patch-2.4.22 linux-2.4.22/drivers/acpi/events/evxfregn.c

• Lines: 522
• Date: 2003-08-25 04:44:41.000000000 -0700
• Orig file: linux-2.4.21/drivers/acpi/events/evxfregn.c
• Orig date: 2001-10-24 14:06:22.000000000 -0700

diff -urN linux-2.4.21/drivers/acpi/events/evxfregn.c linux-2.4.22/drivers/acpi/events/evxfregn.c
@@ -2,84 +2,101 @@
  *
  * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
  *                         Address Spaces.
- *              $Revision: 40 $
  *
  *****************************************************************************/
 
 /*
- *  Copyright (C) 2000, 2001 R. Byron Moore
+ * Copyright (C) 2000 - 2003, R. Byron Moore
+ * All rights reserved.
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * 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.h"
-#include "achware.h"
-#include "acnamesp.h"
-#include "acevents.h"
-#include "amlcode.h"
-#include "acinterp.h"
+#include <acpi/acpi.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acevents.h>
+#include <acpi/acinterp.h>
 
 #define _COMPONENT          ACPI_EVENTS
-	 MODULE_NAME         ("evxfregn")
+	 ACPI_MODULE_NAME    ("evxfregn")
 
 
 /*******************************************************************************
  *
- * FUNCTION:    Acpi_install_address_space_handler
+ * FUNCTION:    acpi_install_address_space_handler
  *
  * PARAMETERS:  Device          - Handle for the device
- *              Space_id        - The address space ID
+ *              space_id        - The address space ID
  *              Handler         - Address of the handler
  *              Setup           - Address of the setup function
  *              Context         - Value passed to the handler on each access
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Install a handler for all Op_regions of a given Space_id.
+ * DESCRIPTION: Install a handler for all op_regions of a given space_id.
  *
  ******************************************************************************/
 
 acpi_status
 acpi_install_address_space_handler (
-	acpi_handle             device,
-	ACPI_ADR_SPACE_TYPE     space_id,
-	acpi_adr_space_handler  handler,
-	acpi_adr_space_setup    setup,
-	void                    *context)
+	acpi_handle                     device,
+	acpi_adr_space_type             space_id,
+	acpi_adr_space_handler          handler,
+	acpi_adr_space_setup            setup,
+	void                            *context)
 {
-	acpi_operand_object     *obj_desc;
-	acpi_operand_object     *handler_obj;
-	acpi_namespace_node     *node;
-	acpi_status             status = AE_OK;
-	acpi_object_type8       type;
-	u16                     flags = 0;
+	union acpi_operand_object       *obj_desc;
+	union acpi_operand_object       *handler_obj;
+	struct acpi_namespace_node      *node;
+	acpi_status                     status;
+	acpi_object_type                type;
+	u16                             flags = 0;
 
 
-	FUNCTION_TRACE ("Acpi_install_address_space_handler");
+	ACPI_FUNCTION_TRACE ("acpi_install_address_space_handler");
 
 
 	/* Parameter validation */
 
-	if ((!device)   ||
-		((!handler)  && (handler != ACPI_DEFAULT_HANDLER)) ||
-		(space_id > ACPI_MAX_ADDRESS_SPACE)) {
+	if (!device) {
 		return_ACPI_STATUS (AE_BAD_PARAMETER);
 	}
 
-	acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
 
 	/* Convert and validate the device handle */
 
@@ -103,7 +120,7 @@
 	}
 
 	if (handler == ACPI_DEFAULT_HANDLER) {
-		flags = ADDR_HANDLER_DEFAULT_INSTALLED;
+		flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
 
 		switch (space_id) {
 		case ACPI_ADR_SPACE_SYSTEM_MEMORY:
@@ -131,55 +148,65 @@
 			setup   = acpi_ev_pci_bar_region_setup;
 			break;
 
+		case ACPI_ADR_SPACE_DATA_TABLE:
+			handler = acpi_ex_data_table_space_handler;
+			setup   = NULL;
+			break;
+
 		default:
-			status = AE_NOT_EXIST;
+			status = AE_BAD_PARAMETER;
 			goto unlock_and_exit;
-			break;
 		}
 	}
 
-	/*
-	 * If the caller hasn't specified a setup routine, use the default
-	 */
+	/* If the caller hasn't specified a setup routine, use the default */
+
 	if (!setup) {
 		setup = acpi_ev_default_region_setup;
 	}
 
-	/*
-	 * Check for an existing internal object
-	 */
+	/* Check for an existing internal object */
+
 	obj_desc = acpi_ns_get_attached_object (node);
 	if (obj_desc) {
 		/*
-		 * The object exists.
+		 * The attached device object already exists.
 		 * Make sure the handler is not already installed.
 		 */
+		handler_obj = obj_desc->device.address_space;
 
-		/* check the address handler the user requested */
+		/* Walk the handler list for this device */
 
-		handler_obj = obj_desc->device.addr_handler;
 		while (handler_obj) {
-			/*
-			 * We have an Address handler, see if user requested this
-			 * address space.
-			 */
-			if(handler_obj->addr_handler.space_id == space_id) {
-				status = AE_EXIST;
+			/* Same space_id indicates a handler already installed */
+
+			if(handler_obj->address_space.space_id == space_id) {
+				if (handler_obj->address_space.handler == handler) {
+					/*
+					 * It is (relatively) OK to attempt to install the SAME
+					 * handler twice. This can easily happen with PCI_Config space.
+					 */
+					status = AE_SAME_HANDLER;
+					goto unlock_and_exit;
+				}
+				else {
+					/* A handler is already installed */
+
+					status = AE_ALREADY_EXISTS;
+				}
 				goto unlock_and_exit;
 			}
 
-			/*
-			 * Move through the linked list of handlers
-			 */
-			handler_obj = handler_obj->addr_handler.next;
+			/* Walk the linked list of handlers */
+
+			handler_obj = handler_obj->address_space.next;
 		}
 	}
-
 	else {
 		ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
 			"Creating object on Device %p while installing handler\n", node));
 
-		/* Obj_desc does not exist, create one */
+		/* obj_desc does not exist, create one */
 
 		if (node->type == ACPI_TYPE_ANY) {
 			type = ACPI_TYPE_DEVICE;
@@ -200,110 +227,117 @@
 
 		/* Attach the new object to the Node */
 
-		status = acpi_ns_attach_object (node, obj_desc, (u8) type);
+		status = acpi_ns_attach_object (node, obj_desc, type);
+
+		/* Remove local reference to the object */
+
+		acpi_ut_remove_reference (obj_desc);
+
 		if (ACPI_FAILURE (status)) {
-			acpi_ut_remove_reference (obj_desc);
 			goto unlock_and_exit;
 		}
 	}
 
 	ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
-		"Installing address handler for region %s(%X) on Device %p(%p)\n",
-		acpi_ut_get_region_name (space_id), space_id, node, obj_desc));
+		"Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
+		acpi_ut_get_region_name (space_id), space_id, node->name.ascii, node, obj_desc));
 
 	/*
-	 * Now we can install the handler
+	 * Install the handler
 	 *
-	 * At this point we know that there is no existing handler.
-	 * So, we just allocate the object for the handler and link it
+	 * At this point there is no existing handler.
+	 * Just allocate the object for the handler and link it
 	 * into the list.
 	 */
-	handler_obj = acpi_ut_create_internal_object (INTERNAL_TYPE_ADDRESS_HANDLER);
+	handler_obj = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
 	if (!handler_obj) {
 		status = AE_NO_MEMORY;
 		goto unlock_and_exit;
 	}
 
-	handler_obj->addr_handler.space_id  = (u8) space_id;
-	handler_obj->addr_handler.hflags    = flags;
-	handler_obj->addr_handler.next      = obj_desc->device.addr_handler;
-	handler_obj->addr_handler.region_list = NULL;
-	handler_obj->addr_handler.node      = node;
-	handler_obj->addr_handler.handler   = handler;
-	handler_obj->addr_handler.context   = context;
-	handler_obj->addr_handler.setup     = setup;
+	/* Init handler obj */
+
+	handler_obj->address_space.space_id  = (u8) space_id;
+	handler_obj->address_space.hflags    = flags;
+	handler_obj->address_space.region_list = NULL;
+	handler_obj->address_space.node      = node;
+	handler_obj->address_space.handler   = handler;
+	handler_obj->address_space.context   = context;
+	handler_obj->address_space.setup     = setup;
+
+	/* Install at head of Device.address_space list */
+
+	handler_obj->address_space.next      = obj_desc->device.address_space;
+
+	/*
+	 * The Device object is the first reference on the handler_obj.
+	 * Each region that uses the handler adds a reference.
+	 */
+	obj_desc->device.address_space = handler_obj;
 
 	/*
-	 * Now walk the namespace finding all of the regions this
+	 * Walk the namespace finding all of the regions this
 	 * handler will manage.
 	 *
-	 * We start at the device and search the branch toward
+	 * Start at the device and search the branch toward
 	 * the leaf nodes until either the leaf is encountered or
 	 * a device is detected that has an address handler of the
 	 * same type.
 	 *
-	 * In either case we back up and search down the remainder
+	 * In either case, back up and search down the remainder
 	 * of the branch
 	 */
-	status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, device,
-			 ACPI_UINT32_MAX, NS_WALK_UNLOCK,
-			 acpi_ev_addr_handler_helper,
-			 handler_obj, NULL);
-
-	/*
-	 * Place this handler 1st on the list
-	 */
-	handler_obj->common.reference_count =
-			 (u16) (handler_obj->common.reference_count +
-			 obj_desc->common.reference_count - 1);
-	obj_desc->device.addr_handler = handler_obj;
-
+	status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, device, ACPI_UINT32_MAX,
+			  ACPI_NS_WALK_UNLOCK, acpi_ev_install_handler,
+			  handler_obj, NULL);
 
 unlock_and_exit:
-	acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
 	return_ACPI_STATUS (status);
 }
 
 
 /*******************************************************************************
  *
- * FUNCTION:    Acpi_remove_address_space_handler
+ * FUNCTION:    acpi_remove_address_space_handler
  *
- * PARAMETERS:  Space_id        - The address space ID
+ * PARAMETERS:  Device          - Handle for the device
+ *              space_id        - The address space ID
  *              Handler         - Address of the handler
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Install a handler for accesses on an Operation Region
+ * DESCRIPTION: Remove a previously installed handler.
  *
  ******************************************************************************/
 
 acpi_status
 acpi_remove_address_space_handler (
-	acpi_handle             device,
-	ACPI_ADR_SPACE_TYPE     space_id,
-	acpi_adr_space_handler  handler)
+	acpi_handle                     device,
+	acpi_adr_space_type             space_id,
+	acpi_adr_space_handler          handler)
 {
-	acpi_operand_object     *obj_desc;
-	acpi_operand_object     *handler_obj;
-	acpi_operand_object     *region_obj;
-	acpi_operand_object     **last_obj_ptr;
-	acpi_namespace_node     *node;
-	acpi_status             status = AE_OK;
+	union acpi_operand_object       *obj_desc;
+	union acpi_operand_object       *handler_obj;
+	union acpi_operand_object       *region_obj;
+	union acpi_operand_object       **last_obj_ptr;
+	struct acpi_namespace_node      *node;
+	acpi_status                     status;
 
 
-	FUNCTION_TRACE ("Acpi_remove_address_space_handler");
+	ACPI_FUNCTION_TRACE ("acpi_remove_address_space_handler");
 
 
 	/* Parameter validation */
 
-	if ((!device)   ||
-		((!handler)  && (handler != ACPI_DEFAULT_HANDLER)) ||
-		(space_id > ACPI_MAX_ADDRESS_SPACE)) {
+	if (!device) {
 		return_ACPI_STATUS (AE_BAD_PARAMETER);
 	}
 
-	acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
 
 	/* Convert and validate the device handle */
 
@@ -313,7 +347,6 @@
 		goto unlock_and_exit;
 	}
 
-
 	/* Make sure the internal object exists */
 
 	obj_desc = acpi_ns_get_attached_object (node);
@@ -322,25 +355,22 @@
 		goto unlock_and_exit;
 	}
 
-	/*
-	 * find the address handler the user requested
-	 */
-	handler_obj = obj_desc->device.addr_handler;
-	last_obj_ptr = &obj_desc->device.addr_handler;
+	/* Find the address handler the user requested */
+
+	handler_obj = obj_desc->device.address_space;
+	last_obj_ptr = &obj_desc->device.address_space;
 	while (handler_obj) {
-		/*
-		 * We have a handler, see if user requested this one
-		 */
-		if (handler_obj->addr_handler.space_id == space_id) {
-			/*
-			 * Got it, first dereference this in the Regions
-			 */
+		/* We have a handler, see if user requested this one */
+
+		if (handler_obj->address_space.space_id == space_id) {
+			/* Matched space_id, first dereference this in the Regions */
+
 			ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
 				"Removing address handler %p(%p) for region %s on Device %p(%p)\n",
 				handler_obj, handler, acpi_ut_get_region_name (space_id),
 				node, obj_desc));
 
-			region_obj = handler_obj->addr_handler.region_list;
+			region_obj = handler_obj->address_space.region_list;
 
 			/* Walk the handler's region list */
 
@@ -352,51 +382,42 @@
 				 * The region is just inaccessible as indicated to
 				 * the _REG method
 				 */
-				acpi_ev_disassociate_region_from_handler(region_obj, TRUE);
+				acpi_ev_detach_region (region_obj, TRUE);
 
 				/*
-				 * Walk the list, since we took the first region and it
-				 * was removed from the list by the dissassociate call
-				 * we just get the first item on the list again
+				 * Walk the list: Just grab the head because the
+				 * detach_region removed the previous head.
 				 */
-				region_obj = handler_obj->addr_handler.region_list;
+				region_obj = handler_obj->address_space.region_list;
 
 			}
 
-			/*
-			 * Remove this Handler object from the list
-			 */
-			*last_obj_ptr = handler_obj->addr_handler.next;
-
-			/*
-			 * Now we can delete the handler object
-			 */
-			acpi_ut_remove_reference (handler_obj);
-			acpi_ut_remove_reference (handler_obj);
+			/* Remove this Handler object from the list */
 
+			*last_obj_ptr = handler_obj->address_space.next;
+
+			/* Now we can delete the handler object */
+
+			acpi_ut_remove_reference (handler_obj);
 			goto unlock_and_exit;
 		}
 
-		/*
-		 * Move through the linked list of handlers
-		 */
-		last_obj_ptr = &handler_obj->addr_handler.next;
-		handler_obj = handler_obj->addr_handler.next;
+		/* Walk the linked list of handlers */
+
+		last_obj_ptr = &handler_obj->address_space.next;
+		handler_obj = handler_obj->address_space.next;
 	}
 
+	/* The handler does not exist */
 
-	/*
-	 * The handler does not exist
-	 */
 	ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
-		"Unable to remove address handler %p for %s(%X), Dev_node %p, obj %p\n",
+		"Unable to remove address handler %p for %s(%X), dev_node %p, obj %p\n",
 		handler, acpi_ut_get_region_name (space_id), space_id, node, obj_desc));
 
 	status = AE_NOT_EXIST;
 
-
 unlock_and_exit:
-	acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
 	return_ACPI_STATUS (status);
 }