File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
new file mode 100644
index 0000000..07d22bf
--- /dev/null
+++ b/drivers/acpi/acpica/evxface.c
@@ -0,0 +1,1105 @@
+/******************************************************************************
+ *
+ * Module Name: evxface - External interfaces for ACPI events
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, 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.
+ */
+
+#define EXPORT_ACPI_INTERFACES
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+#include "acevents.h"
+#include "acinterp.h"
+
+#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
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_notify_handler
+ *
+ * PARAMETERS: device - The device for which notifies will be handled
+ * handler_type - The type of handler:
+ * ACPI_SYSTEM_NOTIFY: System Handler (00-7F)
+ * ACPI_DEVICE_NOTIFY: Device Handler (80-FF)
+ * ACPI_ALL_NOTIFY: Both System and Device
+ * handler - Address of the handler
+ * context - Value passed to the handler on each GPE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Install a handler for notifications on an ACPI Device,
+ * thermal_zone, or Processor object.
+ *
+ * NOTES: The Root namespace object may have only one handler for each
+ * type of notify (System/Device). Device/Thermal/Processor objects
+ * may have one device notify handler, and multiple system notify
+ * handlers.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_notify_handler(acpi_handle device,
+ u32 handler_type,
+ acpi_notify_handler handler, void *context)
+{
+ struct acpi_namespace_node *node =
+ ACPI_CAST_PTR(struct acpi_namespace_node, device);
+ union acpi_operand_object *obj_desc;
+ union acpi_operand_object *handler_obj;
+ acpi_status status;
+ u32 i;
+
+ ACPI_FUNCTION_TRACE(acpi_install_notify_handler);
+
+ /* Parameter validation */
+
+ if ((!device) || (!handler) || (!handler_type) ||
+ (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * Root Object:
+ * Registering a notify handler on the root object indicates that the
+ * caller wishes to receive notifications for all objects. Note that
+ * only one global handler can be registered per notify type.
+ * Ensure that a handler is not already installed.
+ */
+ if (device == ACPI_ROOT_OBJECT) {
+ for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
+ if (handler_type & (i + 1)) {
+ if (acpi_gbl_global_notify[i].handler) {
+ status = AE_ALREADY_EXISTS;
+ goto unlock_and_exit;
+ }
+
+ acpi_gbl_global_notify[i].handler = handler;
+ acpi_gbl_global_notify[i].context = context;
+ }
+ }
+
+ goto unlock_and_exit; /* Global notify handler installed, all done */
+ }
+
+ /*
+ * All Other Objects:
+ * Caller will only receive notifications specific to the target
+ * object. Note that only certain object types are allowed to
+ * receive notifications.
+ */
+
+ /* Are Notifies allowed on this object? */
+
+ if (!acpi_ev_is_notify_object(node)) {
+ status = AE_TYPE;
+ goto unlock_and_exit;
+ }
+
+ /* Check for an existing internal object, might not exist */
+
+ obj_desc = acpi_ns_get_attached_object(node);
+ if (!obj_desc) {
+
+ /* Create a new object */
+
+ obj_desc = acpi_ut_create_internal_object(node->type);
+ if (!obj_desc) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ /* Attach new object to the Node, remove local reference */
+
+ status = acpi_ns_attach_object(device, obj_desc, node->type);
+ acpi_ut_remove_reference(obj_desc);
+ if (ACPI_FAILURE(status)) {
+ goto unlock_and_exit;
+ }
+ }
+
+ /* Ensure that the handler is not already installed in the lists */
+
+ for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
+ if (handler_type & (i + 1)) {
+ handler_obj = obj_desc->common_notify.notify_list[i];
+ while (handler_obj) {
+ if (handler_obj->notify.handler == handler) {
+ status = AE_ALREADY_EXISTS;
+ goto unlock_and_exit;
+ }
+
+ handler_obj = handler_obj->notify.next[i];
+ }
+ }
+ }
+
+ /* Create and populate a new notify handler object */
+
+ handler_obj = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY);
+ if (!handler_obj) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ handler_obj->notify.node = node;
+ handler_obj->notify.handler_type = handler_type;
+ handler_obj->notify.handler = handler;
+ handler_obj->notify.context = context;
+
+ /* Install the handler at the list head(s) */
+
+ for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
+ if (handler_type & (i + 1)) {
+ handler_obj->notify.next[i] =
+ obj_desc->common_notify.notify_list[i];
+
+ obj_desc->common_notify.notify_list[i] = handler_obj;
+ }
+ }
+
+ /* Add an extra reference if handler was installed in both lists */
+
+ if (handler_type == ACPI_ALL_NOTIFY) {
+ acpi_ut_add_reference(handler_obj);
+ }
+
+unlock_and_exit:
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_notify_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_remove_notify_handler
+ *
+ * PARAMETERS: device - The device for which the handler is installed
+ * handler_type - The type of handler:
+ * ACPI_SYSTEM_NOTIFY: System Handler (00-7F)
+ * ACPI_DEVICE_NOTIFY: Device Handler (80-FF)
+ * ACPI_ALL_NOTIFY: Both System and Device
+ * handler - Address of the handler
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Remove a handler for notifies on an ACPI device
+ *
+ ******************************************************************************/
+acpi_status
+acpi_remove_notify_handler(acpi_handle device,
+ u32 handler_type, acpi_notify_handler handler)
+{
+ struct acpi_namespace_node *node =
+ ACPI_CAST_PTR(struct acpi_namespace_node, device);
+ union acpi_operand_object *obj_desc;
+ union acpi_operand_object *handler_obj;
+ union acpi_operand_object *previous_handler_obj;
+ acpi_status status = AE_OK;
+ u32 i;
+
+ ACPI_FUNCTION_TRACE(acpi_remove_notify_handler);
+
+ /* Parameter validation */
+
+ if ((!device) || (!handler) || (!handler_type) ||
+ (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ /* Root Object. Global handlers are removed here */
+
+ if (device == ACPI_ROOT_OBJECT) {
+ for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
+ if (handler_type & (i + 1)) {
+ status =
+ acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ if (!acpi_gbl_global_notify[i].handler ||
+ (acpi_gbl_global_notify[i].handler !=
+ handler)) {
+ status = AE_NOT_EXIST;
+ goto unlock_and_exit;
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Removing global notify handler\n"));
+
+ acpi_gbl_global_notify[i].handler = NULL;
+ acpi_gbl_global_notify[i].context = NULL;
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+
+ /* Make sure all deferred notify tasks are completed */
+
+ acpi_os_wait_events_complete();
+ }
+ }
+
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /* All other objects: Are Notifies allowed on this object? */
+
+ if (!acpi_ev_is_notify_object(node)) {
+ return_ACPI_STATUS(AE_TYPE);
+ }
+
+ /* Must have an existing internal object */
+
+ obj_desc = acpi_ns_get_attached_object(node);
+ if (!obj_desc) {
+ return_ACPI_STATUS(AE_NOT_EXIST);
+ }
+
+ /* Internal object exists. Find the handler and remove it */
+
+ for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
+ if (handler_type & (i + 1)) {
+ status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ handler_obj = obj_desc->common_notify.notify_list[i];
+ previous_handler_obj = NULL;
+
+ /* Attempt to find the handler in the handler list */
+
+ while (handler_obj &&
+ (handler_obj->notify.handler != handler)) {
+ previous_handler_obj = handler_obj;
+ handler_obj = handler_obj->notify.next[i];
+ }
+
+ if (!handler_obj) {
+ status = AE_NOT_EXIST;
+ goto unlock_and_exit;
+ }
+
+ /* Remove the handler object from the list */
+
+ if (previous_handler_obj) { /* Handler is not at the list head */
+ previous_handler_obj->notify.next[i] =
+ handler_obj->notify.next[i];
+ } else { /* Handler is at the list head */
+
+ obj_desc->common_notify.notify_list[i] =
+ handler_obj->notify.next[i];
+ }
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+
+ /* Make sure all deferred notify tasks are completed */
+
+ acpi_os_wait_events_complete();
+ acpi_ut_remove_reference(handler_obj);
+ }
+ }
+
+ return_ACPI_STATUS(status);
+
+unlock_and_exit:
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_exception_handler
+ *
+ * PARAMETERS: handler - Pointer to the handler function for the
+ * event
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function
+ *
+ ******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
+acpi_status acpi_install_exception_handler(acpi_exception_handler handler)
+{
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_install_exception_handler);
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Don't allow two handlers. */
+
+ if (acpi_gbl_exception_handler) {
+ status = AE_ALREADY_EXISTS;
+ goto cleanup;
+ }
+
+ /* Install the handler */
+
+ acpi_gbl_exception_handler = handler;
+
+cleanup:
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_exception_handler)
+#endif
+
+#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);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_sci_handler)
+
+/*******************************************************************************
+ *
+ * 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);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_sci_handler)
+
+/*******************************************************************************
+ *
+ * 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
+ *
+ * PARAMETERS: event - Event type to enable.
+ * handler - Pointer to the handler function for the
+ * event
+ * context - Value passed to the handler on each GPE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function and then enables the
+ * event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_fixed_event_handler(u32 event,
+ acpi_event_handler handler, void *context)
+{
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler);
+
+ /* Parameter validation */
+
+ if (event > ACPI_EVENT_MAX) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Do not allow multiple handlers */
+
+ if (acpi_gbl_fixed_event_handlers[event].handler) {
+ status = AE_ALREADY_EXISTS;
+ goto cleanup;
+ }
+
+ /* Install the handler before enabling the event */
+
+ acpi_gbl_fixed_event_handlers[event].handler = handler;
+ acpi_gbl_fixed_event_handlers[event].context = context;
+
+ status = acpi_clear_event(event);
+ if (ACPI_SUCCESS(status))
+ status = acpi_enable_event(event, 0);
+ if (ACPI_FAILURE(status)) {
+ ACPI_WARNING((AE_INFO,
+ "Could not enable fixed event - %s (%u)",
+ acpi_ut_get_event_name(event), event));
+
+ /* Remove the handler */
+
+ acpi_gbl_fixed_event_handlers[event].handler = NULL;
+ acpi_gbl_fixed_event_handlers[event].context = NULL;
+ } else {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Enabled fixed event %s (%X), Handler=%p\n",
+ acpi_ut_get_event_name(event), event,
+ handler));
+ }
+
+cleanup:
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_remove_fixed_event_handler
+ *
+ * PARAMETERS: event - Event type to disable.
+ * handler - Address of the handler
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Disables the event and unregisters the event handler.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler)
+{
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler);
+
+ /* Parameter validation */
+
+ if (event > ACPI_EVENT_MAX) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Disable the event before removing the handler */
+
+ status = acpi_disable_event(event, 0);
+
+ /* Always Remove the handler */
+
+ acpi_gbl_fixed_event_handlers[event].handler = NULL;
+ acpi_gbl_fixed_event_handlers[event].context = NULL;
+
+ if (ACPI_FAILURE(status)) {
+ ACPI_WARNING((AE_INFO,
+ "Could not disable fixed event - %s (%u)",
+ acpi_ut_get_event_name(event), event));
+ } else {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Disabled fixed event - %s (%X)\n",
+ acpi_ut_get_event_name(event), event));
+ }
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_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: Internal function to install a handler for a General Purpose
+ * Event.
+ *
+ ******************************************************************************/
+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(ev_install_gpe_handler);
+
+ /* Parameter validation */
+
+ if ((!address) || (type & ~ACPI_GPE_XRUPT_TYPE_MASK)) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Allocate and init handler object (before lock) */
+
+ handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_handler_info));
+ if (!handler) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+ /* Ensure that we have a valid GPE number */
+
+ gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+ if (!gpe_event_info) {
+ status = AE_BAD_PARAMETER;
+ goto free_and_exit;
+ }
+
+ /* Make sure that there isn't a handler there already */
+
+ 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;
+ }
+
+ handler->address = address;
+ handler->context = context;
+ handler->method_node = gpe_event_info->dispatch.method_node;
+ handler->original_flags = (u8)(gpe_event_info->flags &
+ (ACPI_GPE_XRUPT_TYPE_MASK |
+ ACPI_GPE_DISPATCH_MASK));
+
+ /*
+ * If the GPE is associated with a method, it may have been enabled
+ * automatically during initialization, in which case it has to be
+ * disabled now to avoid spurious execution of the handler.
+ */
+ if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+ ACPI_GPE_DISPATCH_METHOD) ||
+ (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+ ACPI_GPE_DISPATCH_NOTIFY)) && gpe_event_info->runtime_count) {
+ handler->originally_enabled = TRUE;
+ (void)acpi_ev_remove_gpe_reference(gpe_event_info);
+
+ /* Sanity check of original type against new type */
+
+ if (type !=
+ (u32)(gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) {
+ ACPI_WARNING((AE_INFO,
+ "GPE type mismatch (level/edge)"));
+ }
+ }
+
+ /* Install the handler */
+
+ gpe_event_info->dispatch.handler = handler;
+
+ /* Setup up dispatch flags to indicate handler (vs. method/notify) */
+
+ gpe_event_info->flags &=
+ ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+ 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);
+
+unlock_and_exit:
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+
+free_and_exit:
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ ACPI_FREE(handler);
+ 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
+ * defined GPEs)
+ * gpe_number - The event to remove a handler
+ * address - Address of the handler
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Remove a handler for a General Purpose acpi_event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_remove_gpe_handler(acpi_handle gpe_device,
+ u32 gpe_number, acpi_gpe_handler address)
+{
+ 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_remove_gpe_handler);
+
+ /* Parameter validation */
+
+ if (!address) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+ /* Ensure that we have a valid GPE number */
+
+ gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+ if (!gpe_event_info) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Make sure that a handler is indeed installed */
+
+ 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;
+ }
+
+ /* Make sure that the installed handler is the same */
+
+ if (gpe_event_info->dispatch.handler->address != address) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Remove the handler */
+
+ handler = gpe_event_info->dispatch.handler;
+ gpe_event_info->dispatch.handler = NULL;
+
+ /* Restore Method node (if any), set dispatch flags */
+
+ gpe_event_info->dispatch.method_node = handler->method_node;
+ gpe_event_info->flags &=
+ ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+ gpe_event_info->flags |= handler->original_flags;
+
+ /*
+ * If the GPE was previously associated with a method and it was
+ * enabled, it should be enabled at this point to restore the
+ * post-initialization configuration.
+ */
+ if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+ ACPI_GPE_DISPATCH_METHOD) ||
+ (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+ ACPI_GPE_DISPATCH_NOTIFY)) && handler->originally_enabled) {
+ (void)acpi_ev_add_gpe_reference(gpe_event_info);
+ }
+
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+
+ /* Make sure all deferred GPE tasks are completed */
+
+ acpi_os_wait_events_complete();
+
+ /* Now we can free the handler object */
+
+ ACPI_FREE(handler);
+ return_ACPI_STATUS(status);
+
+unlock_and_exit:
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_gpe_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_acquire_global_lock
+ *
+ * PARAMETERS: timeout - How long the caller is willing to wait
+ * handle - Where the handle to the lock is returned
+ * (if acquired)
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Acquire the ACPI Global Lock
+ *
+ * Note: Allows callers with the same thread ID to acquire the global lock
+ * multiple times. In other words, externally, the behavior of the global lock
+ * is identical to an AML mutex. On the first acquire, a new handle is
+ * returned. On any subsequent calls to acquire by the same thread, the same
+ * handle is returned.
+ *
+ ******************************************************************************/
+acpi_status acpi_acquire_global_lock(u16 timeout, u32 *handle)
+{
+ acpi_status status;
+
+ if (!handle) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ /* Must lock interpreter to prevent race conditions */
+
+ acpi_ex_enter_interpreter();
+
+ status = acpi_ex_acquire_mutex_object(timeout,
+ acpi_gbl_global_lock_mutex,
+ acpi_os_get_thread_id());
+
+ if (ACPI_SUCCESS(status)) {
+
+ /* Return the global lock handle (updated in acpi_ev_acquire_global_lock) */
+
+ *handle = acpi_gbl_global_lock_handle;
+ }
+
+ acpi_ex_exit_interpreter();
+ return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_acquire_global_lock)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_release_global_lock
+ *
+ * PARAMETERS: handle - Returned from acpi_acquire_global_lock
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid.
+ *
+ ******************************************************************************/
+acpi_status acpi_release_global_lock(u32 handle)
+{
+ acpi_status status;
+
+ if (!handle || (handle != acpi_gbl_global_lock_handle)) {
+ return (AE_NOT_ACQUIRED);
+ }
+
+ status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex);
+ return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_release_global_lock)
+#endif /* !ACPI_REDUCED_HARDWARE */