Merge commit 'v2.6.29-rc1' into timers/urgent

1 files changed, 684 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evrgnini.c b/drivers/acpi/acpica/evrgnini.c
new file mode 100644
index 00000000000..f3f1fb45c3d
--- /dev/null
+++ b/drivers/acpi/acpica/evrgnini.c
@@ -0,0 +1,684 @@
+/******************************************************************************
+ *
+ * Module Name: evrgnini- ACPI address_space (op_region) init
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, 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.
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acevents.h"
+#include "acnamesp.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evrgnini")
+
+/* Local prototypes */
+static u8 acpi_ev_match_pci_root_bridge(char *id);
+
+static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_system_memory_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a system_memory operation region
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_system_memory_region_setup(acpi_handle handle,
+				   u32 function,
+				   void *handler_context, void **region_context)
+{
+	union acpi_operand_object *region_desc =
+	    (union acpi_operand_object *)handle;
+	struct acpi_mem_space_context *local_region_context;
+
+	ACPI_FUNCTION_TRACE(ev_system_memory_region_setup);
+
+	if (function == ACPI_REGION_DEACTIVATE) {
+		if (*region_context) {
+			local_region_context =
+			    (struct acpi_mem_space_context *)*region_context;
+
+			/* Delete a cached mapping if present */
+
+			if (local_region_context->mapped_length) {
+				acpi_os_unmap_memory(local_region_context->
+						     mapped_logical_address,
+						     local_region_context->
+						     mapped_length);
+			}
+			ACPI_FREE(local_region_context);
+			*region_context = NULL;
+		}
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Create a new context */
+
+	local_region_context =
+	    ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_mem_space_context));
+	if (!(local_region_context)) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/* Save the region length and address for use in the handler */
+
+	local_region_context->length = region_desc->region.length;
+	local_region_context->address = region_desc->region.address;
+
+	*region_context = local_region_context;
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_io_space_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a IO operation region
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_io_space_region_setup(acpi_handle handle,
+			      u32 function,
+			      void *handler_context, void **region_context)
+{
+	ACPI_FUNCTION_TRACE(ev_io_space_region_setup);
+
+	if (function == ACPI_REGION_DEACTIVATE) {
+		*region_context = NULL;
+	} else {
+		*region_context = handler_context;
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_pci_config_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a PCI_Config operation region
+ *
+ * MUTEX:       Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_pci_config_region_setup(acpi_handle handle,
+				u32 function,
+				void *handler_context, void **region_context)
+{
+	acpi_status status = AE_OK;
+	acpi_integer pci_value;
+	struct acpi_pci_id *pci_id = *region_context;
+	union acpi_operand_object *handler_obj;
+	struct acpi_namespace_node *parent_node;
+	struct acpi_namespace_node *pci_root_node;
+	struct acpi_namespace_node *pci_device_node;
+	union acpi_operand_object *region_obj =
+	    (union acpi_operand_object *)handle;
+
+	ACPI_FUNCTION_TRACE(ev_pci_config_region_setup);
+
+	handler_obj = region_obj->region.handler;
+	if (!handler_obj) {
+		/*
+		 * No installed handler. This shouldn't happen because the dispatch
+		 * routine checks before we get here, but we check again just in case.
+		 */
+		ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+				  "Attempting to init a region %p, with no handler\n",
+				  region_obj));
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
+	*region_context = NULL;
+	if (function == ACPI_REGION_DEACTIVATE) {
+		if (pci_id) {
+			ACPI_FREE(pci_id);
+		}
+		return_ACPI_STATUS(status);
+	}
+
+	parent_node = acpi_ns_get_parent_node(region_obj->region.node);
+
+	/*
+	 * Get the _SEG and _BBN values from the device upon which the handler
+	 * is installed.
+	 *
+	 * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
+	 * This is the device the handler has been registered to handle.
+	 */
+
+	/*
+	 * If the address_space.Node is still pointing to the root, we need
+	 * to scan upward for a PCI Root bridge and re-associate the op_region
+	 * handlers with that device.
+	 */
+	if (handler_obj->address_space.node == acpi_gbl_root_node) {
+
+		/* Start search from the parent object */
+
+		pci_root_node = parent_node;
+		while (pci_root_node != acpi_gbl_root_node) {
+
+			/* Get the _HID/_CID in order to detect a root_bridge */
+
+			if (acpi_ev_is_pci_root_bridge(pci_root_node)) {
+
+				/* Install a handler for this PCI root bridge */
+
+				status =
+				    acpi_install_address_space_handler((acpi_handle) pci_root_node, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
+				if (ACPI_FAILURE(status)) {
+					if (status == AE_SAME_HANDLER) {
+						/*
+						 * It is OK if the handler is already installed on the
+						 * root bridge. Still need to return a context object
+						 * for the new PCI_Config operation region, however.
+						 */
+						status = AE_OK;
+					} else {
+						ACPI_EXCEPTION((AE_INFO, status,
+								"Could not install PciConfig handler for Root Bridge %4.4s",
+								acpi_ut_get_node_name
+								(pci_root_node)));
+					}
+				}
+				break;
+			}
+
+			pci_root_node = acpi_ns_get_parent_node(pci_root_node);
+		}
+
+		/* PCI root bridge not found, use namespace root node */
+	} else {
+		pci_root_node = handler_obj->address_space.node;
+	}
+
+	/*
+	 * If this region is now initialized, we are done.
+	 * (install_address_space_handler could have initialized it)
+	 */
+	if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Region is still not initialized. Create a new context */
+
+	pci_id = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pci_id));
+	if (!pci_id) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/*
+	 * For PCI_Config space access, we need the segment, bus, device and
+	 * function numbers. Acquire them here.
+	 *
+	 * Find the parent device object. (This allows the operation region to be
+	 * within a subscope under the device, such as a control method.)
+	 */
+	pci_device_node = region_obj->region.node;
+	while (pci_device_node && (pci_device_node->type != ACPI_TYPE_DEVICE)) {
+		pci_device_node = acpi_ns_get_parent_node(pci_device_node);
+	}
+
+	if (!pci_device_node) {
+		ACPI_FREE(pci_id);
+		return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+	}
+
+	/*
+	 * Get the PCI device and function numbers from the _ADR object contained
+	 * in the parent's scope.
+	 */
+	status =
+	    acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, pci_device_node,
+					    &pci_value);
+
+	/*
+	 * The default is zero, and since the allocation above zeroed the data,
+	 * just do nothing on failure.
+	 */
+	if (ACPI_SUCCESS(status)) {
+		pci_id->device = ACPI_HIWORD(ACPI_LODWORD(pci_value));
+		pci_id->function = ACPI_LOWORD(ACPI_LODWORD(pci_value));
+	}
+
+	/* The PCI segment number comes from the _SEG method */
+
+	status =
+	    acpi_ut_evaluate_numeric_object(METHOD_NAME__SEG, pci_root_node,
+					    &pci_value);
+	if (ACPI_SUCCESS(status)) {
+		pci_id->segment = ACPI_LOWORD(pci_value);
+	}
+
+	/* The PCI bus number comes from the _BBN method */
+
+	status =
+	    acpi_ut_evaluate_numeric_object(METHOD_NAME__BBN, pci_root_node,
+					    &pci_value);
+	if (ACPI_SUCCESS(status)) {
+		pci_id->bus = ACPI_LOWORD(pci_value);
+	}
+
+	/* Complete this device's pci_id */
+
+	acpi_os_derive_pci_id(pci_root_node, region_obj->region.node, &pci_id);
+
+	*region_context = pci_id;
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_match_pci_root_bridge
+ *
+ * PARAMETERS:  Id              - The HID/CID in string format
+ *
+ * RETURN:      TRUE if the Id is a match for a PCI/PCI-Express Root Bridge
+ *
+ * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID.
+ *
+ ******************************************************************************/
+
+static u8 acpi_ev_match_pci_root_bridge(char *id)
+{
+
+	/*
+	 * Check if this is a PCI root.
+	 * ACPI 3.0+: check for a PCI Express root also.
+	 */
+	if (!(ACPI_STRNCMP(id,
+			   PCI_ROOT_HID_STRING,
+			   sizeof(PCI_ROOT_HID_STRING))) ||
+	    !(ACPI_STRNCMP(id,
+			   PCI_EXPRESS_ROOT_HID_STRING,
+			   sizeof(PCI_EXPRESS_ROOT_HID_STRING)))) {
+		return (TRUE);
+	}
+
+	return (FALSE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_is_pci_root_bridge
+ *
+ * PARAMETERS:  Node            - Device node being examined
+ *
+ * RETURN:      TRUE if device is a PCI/PCI-Express Root Bridge
+ *
+ * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
+ *              examining the _HID and _CID for the device.
+ *
+ ******************************************************************************/
+
+static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
+{
+	acpi_status status;
+	struct acpica_device_id hid;
+	struct acpi_compatible_id_list *cid;
+	u32 i;
+
+	/* Get the _HID and check for a PCI Root Bridge */
+
+	status = acpi_ut_execute_HID(node, &hid);
+	if (ACPI_FAILURE(status)) {
+		return (FALSE);
+	}
+
+	if (acpi_ev_match_pci_root_bridge(hid.value)) {
+		return (TRUE);
+	}
+
+	/* The _HID did not match. Get the _CID and check for a PCI Root Bridge */
+
+	status = acpi_ut_execute_CID(node, &cid);
+	if (ACPI_FAILURE(status)) {
+		return (FALSE);
+	}
+
+	/* Check all _CIDs in the returned list */
+
+	for (i = 0; i < cid->count; i++) {
+		if (acpi_ev_match_pci_root_bridge(cid->id[i].value)) {
+			ACPI_FREE(cid);
+			return (TRUE);
+		}
+	}
+
+	ACPI_FREE(cid);
+	return (FALSE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_pci_bar_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a pci_bAR operation region
+ *
+ * MUTEX:       Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_pci_bar_region_setup(acpi_handle handle,
+			     u32 function,
+			     void *handler_context, void **region_context)
+{
+	ACPI_FUNCTION_TRACE(ev_pci_bar_region_setup);
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_cmos_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a CMOS operation region
+ *
+ * MUTEX:       Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_cmos_region_setup(acpi_handle handle,
+			  u32 function,
+			  void *handler_context, void **region_context)
+{
+	ACPI_FUNCTION_TRACE(ev_cmos_region_setup);
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_default_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Default region initialization
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_default_region_setup(acpi_handle handle,
+			     u32 function,
+			     void *handler_context, void **region_context)
+{
+	ACPI_FUNCTION_TRACE(ev_default_region_setup);
+
+	if (function == ACPI_REGION_DEACTIVATE) {
+		*region_context = NULL;
+	} else {
+		*region_context = handler_context;
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_initialize_region
+ *
+ * PARAMETERS:  region_obj      - Region we are initializing
+ *              acpi_ns_locked  - Is namespace locked?
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
+ *              for execution at a later time
+ *
+ *              Get the appropriate address space handler for a newly
+ *              created region.
+ *
+ *              This also performs address space specific initialization. For
+ *              example, PCI regions must have an _ADR object that contains
+ *              a PCI address in the scope of the definition. This address is
+ *              required to perform an access to PCI config space.
+ *
+ * MUTEX:       Interpreter should be unlocked, because we may run the _REG
+ *              method for this region.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_initialize_region(union acpi_operand_object *region_obj,
+			  u8 acpi_ns_locked)
+{
+	union acpi_operand_object *handler_obj;
+	union acpi_operand_object *obj_desc;
+	acpi_adr_space_type space_id;
+	struct acpi_namespace_node *node;
+	acpi_status status;
+	struct acpi_namespace_node *method_node;
+	acpi_name *reg_name_ptr = (acpi_name *) METHOD_NAME__REG;
+	union acpi_operand_object *region_obj2;
+
+	ACPI_FUNCTION_TRACE_U32(ev_initialize_region, acpi_ns_locked);
+
+	if (!region_obj) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	region_obj2 = acpi_ns_get_secondary_object(region_obj);
+	if (!region_obj2) {
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
+	node = acpi_ns_get_parent_node(region_obj->region.node);
+	space_id = region_obj->region.space_id;
+
+	/* Setup defaults */
+
+	region_obj->region.handler = NULL;
+	region_obj2->extra.method_REG = NULL;
+	region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE);
+	region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
+
+	/* Find any "_REG" method associated with this region definition */
+
+	status =
+	    acpi_ns_search_one_scope(*reg_name_ptr, node, ACPI_TYPE_METHOD,
+				     &method_node);
+	if (ACPI_SUCCESS(status)) {
+		/*
+		 * The _REG method is optional and there can be only one per region
+		 * definition. This will be executed when the handler is attached
+		 * or removed
+		 */
+		region_obj2->extra.method_REG = method_node;
+	}
+
+	/*
+	 * The following loop depends upon the root Node having no parent
+	 * ie: acpi_gbl_root_node->parent_entry being set to NULL
+	 */
+	while (node) {
+
+		/* Check to see if a handler exists */
+
+		handler_obj = NULL;
+		obj_desc = acpi_ns_get_attached_object(node);
+		if (obj_desc) {
+
+			/* Can only be a handler if the object exists */
+
+			switch (node->type) {
+			case ACPI_TYPE_DEVICE:
+
+				handler_obj = obj_desc->device.handler;
+				break;
+
+			case ACPI_TYPE_PROCESSOR:
+
+				handler_obj = obj_desc->processor.handler;
+				break;
+
+			case ACPI_TYPE_THERMAL:
+
+				handler_obj = obj_desc->thermal_zone.handler;
+				break;
+
+			default:
+				/* Ignore other objects */
+				break;
+			}
+
+			while (handler_obj) {
+
+				/* Is this handler of the correct type? */
+
+				if (handler_obj->address_space.space_id ==
+				    space_id) {
+
+					/* Found correct handler */
+
+					ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+							  "Found handler %p for region %p in obj %p\n",
+							  handler_obj,
+							  region_obj,
+							  obj_desc));
+
+					status =
+					    acpi_ev_attach_region(handler_obj,
+								  region_obj,
+								  acpi_ns_locked);
+
+					/*
+					 * Tell all users that this region is usable by running the _REG
+					 * method
+					 */
+					if (acpi_ns_locked) {
+						status =
+						    acpi_ut_release_mutex
+						    (ACPI_MTX_NAMESPACE);
+						if (ACPI_FAILURE(status)) {
+							return_ACPI_STATUS
+							    (status);
+						}
+					}
+
+					status =
+					    acpi_ev_execute_reg_method
+					    (region_obj, 1);
+
+					if (acpi_ns_locked) {
+						status =
+						    acpi_ut_acquire_mutex
+						    (ACPI_MTX_NAMESPACE);
+						if (ACPI_FAILURE(status)) {
+							return_ACPI_STATUS
+							    (status);
+						}
+					}
+
+					return_ACPI_STATUS(AE_OK);
+				}
+
+				/* Try next handler in the list */
+
+				handler_obj = handler_obj->address_space.next;
+			}
+		}
+
+		/* This node does not have the handler we need; Pop up one level */
+
+		node = acpi_ns_get_parent_node(node);
+	}
+
+	/* If we get here, there is no handler for this region */
+
+	ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+			  "No handler for RegionType %s(%X) (RegionObj %p)\n",
+			  acpi_ut_get_region_name(space_id), space_id,
+			  region_obj));
+
+	return_ACPI_STATUS(AE_NOT_EXIST);
+}