patch-2.4.22 linux-2.4.22/drivers/acpi/resources/rsutils.c

• Lines: 517
• Date: 2003-08-25 04:44:41.000000000 -0700
• Orig file: linux-2.4.21/drivers/acpi/resources/rsutils.c
• Orig date: 2001-10-24 14:06:22.000000000 -0700

diff -urN linux-2.4.21/drivers/acpi/resources/rsutils.c linux-2.4.22/drivers/acpi/resources/rsutils.c
@@ -1,44 +1,62 @@
 /*******************************************************************************
  *
  * Module Name: rsutils - Utilities for the resource manager
- *              $Revision: 23 $
  *
  ******************************************************************************/
 
 /*
- *  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 "acnamesp.h"
-#include "acresrc.h"
+#include <acpi/acpi.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acresrc.h>
 
 
 #define _COMPONENT          ACPI_RESOURCES
-	 MODULE_NAME         ("rsutils")
+	 ACPI_MODULE_NAME    ("rsutils")
 
 
 /*******************************************************************************
  *
- * FUNCTION:    Acpi_rs_get_prt_method_data
+ * FUNCTION:    acpi_rs_get_prt_method_data
  *
  * PARAMETERS:  Handle          - a handle to the containing object
- *              Ret_buffer      - a pointer to a buffer structure for the
+ *              ret_buffer      - a pointer to a buffer structure for the
  *                                  results
  *
  * RETURN:      Status
@@ -53,78 +71,45 @@
 
 acpi_status
 acpi_rs_get_prt_method_data (
-	acpi_handle             handle,
-	acpi_buffer             *ret_buffer)
+	acpi_handle                     handle,
+	struct acpi_buffer              *ret_buffer)
 {
-	acpi_operand_object     *ret_obj;
-	acpi_status             status;
-	u32                     buffer_space_needed;
+	union acpi_operand_object       *obj_desc;
+	acpi_status                     status;
 
 
-	FUNCTION_TRACE ("Rs_get_prt_method_data");
+	ACPI_FUNCTION_TRACE ("rs_get_prt_method_data");
 
 
-	/* already validated params, so we won't repeat here */
-
-	buffer_space_needed = ret_buffer->length;
+	/* Parameters guaranteed valid by caller */
 
 	/*
-	 *  Execute the method, no parameters
+	 * Execute the method, no parameters
 	 */
-	status = acpi_ns_evaluate_relative (handle, "_PRT", NULL, &ret_obj);
+	status = acpi_ut_evaluate_object (handle, "_PRT", ACPI_BTYPE_PACKAGE, &obj_desc);
 	if (ACPI_FAILURE (status)) {
 		return_ACPI_STATUS (status);
 	}
 
-	if (!ret_obj) {
-		/* Return object is required */
-
-		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object was returned from _PRT\n"));
-		return_ACPI_STATUS (AE_TYPE);
-	}
-
-
-	/*
-	 * The return object will be a package, so check the
-	 *  parameters.  If the return object is not a package,
-	 *  then the underlying AML code is corrupt or improperly
-	 *  written.
-	 */
-	if (ACPI_TYPE_PACKAGE != ret_obj->common.type) {
-		status = AE_AML_OPERAND_TYPE;
-		goto cleanup;
-	}
-
-	/*
-	 * Make the call to create a resource linked list from the
-	 *  byte stream buffer that comes back from the _CRS method
-	 *  execution.
-	 */
-	status = acpi_rs_create_pci_routing_table (ret_obj, ret_buffer->pointer,
-			  &buffer_space_needed);
-
 	/*
-	 * Tell the user how much of the buffer we have used or is needed
-	 *  and return the final status.
+	 * Create a resource linked list from the byte stream buffer that comes
+	 * back from the _CRS method execution.
 	 */
-	ret_buffer->length = buffer_space_needed;
-
+	status = acpi_rs_create_pci_routing_table (obj_desc, ret_buffer);
 
 	/* On exit, we must delete the object returned by evaluate_object */
 
-cleanup:
-
-	acpi_ut_remove_reference (ret_obj);
+	acpi_ut_remove_reference (obj_desc);
 	return_ACPI_STATUS (status);
 }
 
 
 /*******************************************************************************
  *
- * FUNCTION:    Acpi_rs_get_crs_method_data
+ * FUNCTION:    acpi_rs_get_crs_method_data
  *
  * PARAMETERS:  Handle          - a handle to the containing object
- *              Ret_buffer      - a pointer to a buffer structure for the
+ *              ret_buffer      - a pointer to a buffer structure for the
  *                                  results
  *
  * RETURN:      Status
@@ -139,76 +124,46 @@
 
 acpi_status
 acpi_rs_get_crs_method_data (
-	acpi_handle             handle,
-	acpi_buffer             *ret_buffer)
+	acpi_handle                     handle,
+	struct acpi_buffer              *ret_buffer)
 {
-	acpi_operand_object     *ret_obj;
-	acpi_status             status;
-	u32                     buffer_space_needed = ret_buffer->length;
+	union acpi_operand_object       *obj_desc;
+	acpi_status                     status;
 
 
-	FUNCTION_TRACE ("Rs_get_crs_method_data");
+	ACPI_FUNCTION_TRACE ("rs_get_crs_method_data");
 
 
-	/* already validated params, so we won't repeat here */
+	/* Parameters guaranteed valid by caller */
 
 	/*
-	 *  Execute the method, no parameters
+	 * Execute the method, no parameters
 	 */
-	status = acpi_ns_evaluate_relative (handle, "_CRS", NULL, &ret_obj);
+	status = acpi_ut_evaluate_object (handle, "_CRS", ACPI_BTYPE_BUFFER, &obj_desc);
 	if (ACPI_FAILURE (status)) {
 		return_ACPI_STATUS (status);
 	}
 
-	if (!ret_obj) {
-		/* Return object is required */
-
-		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object was returned from _CRS\n"));
-		return_ACPI_STATUS (AE_TYPE);
-	}
-
-	/*
-	 * The return object will be a buffer, but check the
-	 *  parameters.  If the return object is not a buffer,
-	 *  then the underlying AML code is corrupt or improperly
-	 *  written.
-	 */
-	if (ACPI_TYPE_BUFFER != ret_obj->common.type) {
-		status = AE_AML_OPERAND_TYPE;
-		goto cleanup;
-	}
-
 	/*
 	 * Make the call to create a resource linked list from the
-	 *  byte stream buffer that comes back from the _CRS method
-	 *  execution.
+	 * byte stream buffer that comes back from the _CRS method
+	 * execution.
 	 */
-	status = acpi_rs_create_resource_list (ret_obj, ret_buffer->pointer,
-			 &buffer_space_needed);
+	status = acpi_rs_create_resource_list (obj_desc, ret_buffer);
 
+	/* on exit, we must delete the object returned by evaluate_object */
 
-	/*
-	 * Tell the user how much of the buffer we have used or is needed
-	 *  and return the final status.
-	 */
-	ret_buffer->length = buffer_space_needed;
-
-
-	/* On exit, we must delete the object returned by evaluate_object */
-
-cleanup:
-
-	acpi_ut_remove_reference (ret_obj);
+	acpi_ut_remove_reference (obj_desc);
 	return_ACPI_STATUS (status);
 }
 
 
 /*******************************************************************************
  *
- * FUNCTION:    Acpi_rs_get_prs_method_data
+ * FUNCTION:    acpi_rs_get_prs_method_data
  *
  * PARAMETERS:  Handle          - a handle to the containing object
- *              Ret_buffer      - a pointer to a buffer structure for the
+ *              ret_buffer      - a pointer to a buffer structure for the
  *                                  results
  *
  * RETURN:      Status
@@ -223,75 +178,100 @@
 
 acpi_status
 acpi_rs_get_prs_method_data (
-	acpi_handle             handle,
-	acpi_buffer             *ret_buffer)
+	acpi_handle                     handle,
+	struct acpi_buffer              *ret_buffer)
 {
-	acpi_operand_object     *ret_obj;
-	acpi_status             status;
-	u32                     buffer_space_needed = ret_buffer->length;
+	union acpi_operand_object       *obj_desc;
+	acpi_status                     status;
 
 
-	FUNCTION_TRACE ("Rs_get_prs_method_data");
+	ACPI_FUNCTION_TRACE ("rs_get_prs_method_data");
 
 
-	/* already validated params, so we won't repeat here */
+	/* Parameters guaranteed valid by caller */
 
 	/*
-	 *  Execute the method, no parameters
+	 * Execute the method, no parameters
 	 */
-	status = acpi_ns_evaluate_relative (handle, "_PRS", NULL, &ret_obj);
+	status = acpi_ut_evaluate_object (handle, "_PRS", ACPI_BTYPE_BUFFER, &obj_desc);
 	if (ACPI_FAILURE (status)) {
 		return_ACPI_STATUS (status);
 	}
 
-	if (!ret_obj) {
-		/* Return object is required */
+	/*
+	 * Make the call to create a resource linked list from the
+	 * byte stream buffer that comes back from the _CRS method
+	 * execution.
+	 */
+	status = acpi_rs_create_resource_list (obj_desc, ret_buffer);
 
-		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object was returned from _PRS\n"));
-		return_ACPI_STATUS (AE_TYPE);
-	}
+	/* on exit, we must delete the object returned by evaluate_object */
+
+	acpi_ut_remove_reference (obj_desc);
+	return_ACPI_STATUS (status);
+}
 
-	/*
-	 * The return object will be a buffer, but check the
-	 *  parameters.  If the return object is not a buffer,
-	 *  then the underlying AML code is corrupt or improperly
-	 *  written..
-	 */
-	if (ACPI_TYPE_BUFFER != ret_obj->common.type) {
-		status = AE_AML_OPERAND_TYPE;
-		goto cleanup;
-	}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_get_method_data
+ *
+ * PARAMETERS:  Handle          - a handle to the containing object
+ *              ret_buffer      - a pointer to a buffer structure for the
+ *                                  results
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
+ *              object contained in an object specified by the handle passed in
+ *
+ *              If the function fails an appropriate status will be returned
+ *              and the contents of the callers buffer is undefined.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_get_method_data (
+	acpi_handle                     handle,
+	char                            *path,
+	struct acpi_buffer              *ret_buffer)
+{
+	union acpi_operand_object       *obj_desc;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("rs_get_method_data");
+
+
+	/* Parameters guaranteed valid by caller */
 
 	/*
-	 * Make the call to create a resource linked list from the
-	 *  byte stream buffer that comes back from the _CRS method
-	 *  execution.
+	 * Execute the method, no parameters
 	 */
-	status = acpi_rs_create_resource_list (ret_obj, ret_buffer->pointer,
-			 &buffer_space_needed);
+	status = acpi_ut_evaluate_object (handle, path, ACPI_BTYPE_BUFFER, &obj_desc);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
 
 	/*
-	 * Tell the user how much of the buffer we have used or is needed
-	 *  and return the final status.
+	 * Make the call to create a resource linked list from the
+	 * byte stream buffer that comes back from the method
+	 * execution.
 	 */
-	ret_buffer->length = buffer_space_needed;
-
+	status = acpi_rs_create_resource_list (obj_desc, ret_buffer);
 
 	/* On exit, we must delete the object returned by evaluate_object */
 
-cleanup:
-
-	acpi_ut_remove_reference (ret_obj);
+	acpi_ut_remove_reference (obj_desc);
 	return_ACPI_STATUS (status);
 }
 
-
 /*******************************************************************************
  *
- * FUNCTION:    Acpi_rs_set_srs_method_data
+ * FUNCTION:    acpi_rs_set_srs_method_data
  *
  * PARAMETERS:  Handle          - a handle to the containing object
- *              In_buffer       - a pointer to a buffer structure of the
+ *              in_buffer       - a pointer to a buffer structure of the
  *                                  parameter
  *
  * RETURN:      Status
@@ -306,55 +286,30 @@
 
 acpi_status
 acpi_rs_set_srs_method_data (
-	acpi_handle             handle,
-	acpi_buffer             *in_buffer)
+	acpi_handle                     handle,
+	struct acpi_buffer              *in_buffer)
 {
-	acpi_operand_object     *params[2];
-	acpi_status             status;
-	u8                      *byte_stream = NULL;
-	u32                     buffer_size_needed = 0;
+	union acpi_operand_object       *params[2];
+	acpi_status                     status;
+	struct acpi_buffer              buffer;
 
 
-	FUNCTION_TRACE ("Rs_set_srs_method_data");
+	ACPI_FUNCTION_TRACE ("rs_set_srs_method_data");
 
 
-	/* already validated params, so we won't repeat here */
+	/* Parameters guaranteed valid by caller */
 
 	/*
-	 * The In_buffer parameter will point to a linked list of
+	 * The in_buffer parameter will point to a linked list of
 	 * resource parameters.  It needs to be formatted into a
-	 * byte stream to be sent in as an input parameter.
-	 */
-	buffer_size_needed = 0;
-
-	/*
-	 * First call is to get the buffer size needed
-	 */
-	status = acpi_rs_create_byte_stream (in_buffer->pointer, byte_stream,
-			 &buffer_size_needed);
-	/*
-	 * We expect a return of AE_BUFFER_OVERFLOW
-	 * if not, exit with the error
-	 */
-	if (AE_BUFFER_OVERFLOW != status) {
-		return_ACPI_STATUS (status);
-	}
-
-	/*
-	 * Allocate the buffer needed
+	 * byte stream to be sent in as an input parameter to _SRS
+	 *
+	 * Convert the linked list into a byte stream
 	 */
-	byte_stream = ACPI_MEM_CALLOCATE (buffer_size_needed);
-	if (NULL == byte_stream) {
-		return_ACPI_STATUS (AE_NO_MEMORY);
-	}
-
-	/*
-	 * Now call to convert the linked list into a byte stream
-	 */
-	status = acpi_rs_create_byte_stream (in_buffer->pointer, byte_stream,
-			 &buffer_size_needed);
+	buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
+	status = acpi_rs_create_byte_stream (in_buffer->pointer, &buffer);
 	if (ACPI_FAILURE (status)) {
-		goto cleanup;
+		return_ACPI_STATUS (status);
 	}
 
 	/*
@@ -362,28 +317,27 @@
 	 */
 	params[0] = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER);
 	if (!params[0]) {
-		status = AE_NO_MEMORY;
-		goto cleanup;
+		acpi_os_free (buffer.pointer);
+		return_ACPI_STATUS (AE_NO_MEMORY);
 	}
-	params [1] = NULL;
 
 	/*
-	 *  Set up the parameter object
+	 * Set up the parameter object
 	 */
-	params[0]->buffer.length  = buffer_size_needed;
-	params[0]->buffer.pointer = byte_stream;
+	params[0]->buffer.length  = (u32) buffer.length;
+	params[0]->buffer.pointer = buffer.pointer;
+	params[0]->common.flags   = AOPOBJ_DATA_VALID;
+	params[1] = NULL;
 
 	/*
 	 * Execute the method, no return value
 	 */
 	status = acpi_ns_evaluate_relative (handle, "_SRS", params, NULL);
-	acpi_ut_remove_reference (params[0]);
 
 	/*
-	 * Clean up and return the status from Acpi_ns_evaluate_relative
+	 * Clean up and return the status from acpi_ns_evaluate_relative
 	 */
-cleanup:
-
+	acpi_ut_remove_reference (params[0]);
 	return_ACPI_STATUS (status);
 }