[linux-2.6-block.git] / drivers / acpi / resources / rscreate.c

/*******************************************************************************
 *
 * Module Name: rscreate - Create resource lists/tables
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2005, R. Byron Moore
 * 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 <acpi/acresrc.h>
#include <acpi/amlcode.h>
#include <acpi/acnamesp.h>

#define _COMPONENT          ACPI_RESOURCES
ACPI_MODULE_NAME("rscreate")

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_create_resource_list
 *
 * PARAMETERS:  aml_buffer          - Pointer to the resource byte stream
 *              output_buffer       - Pointer to the user's buffer
 *
 * RETURN:      Status: AE_OK if okay, else a valid acpi_status code
 *              If output_buffer is not large enough, output_buffer_length
 *              indicates how large output_buffer should be, else it
 *              indicates how may u8 elements of output_buffer are valid.
 *
 * DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
 *              execution and parses the stream to create a linked list
 *              of device resources.
 *
 ******************************************************************************/
acpi_status
acpi_rs_create_resource_list(union acpi_operand_object *aml_buffer,
			     struct acpi_buffer *output_buffer)
{

	acpi_status status;
	u8 *aml_start;
	acpi_size list_size_needed = 0;
	u32 aml_buffer_length;

	ACPI_FUNCTION_TRACE("rs_create_resource_list");

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "aml_buffer = %p\n", aml_buffer));

	/* Params already validated, so we don't re-validate here */

	aml_buffer_length = aml_buffer->buffer.length;
	aml_start = aml_buffer->buffer.pointer;

	/*
	 * Pass the aml_buffer into a module that can calculate
	 * the buffer size needed for the linked list
	 */
	status = acpi_rs_get_list_length(aml_start, aml_buffer_length,
					 &list_size_needed);

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Status=%X list_size_needed=%X\n",
			  status, (u32) list_size_needed));
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Validate/Allocate/Clear caller buffer */

	status = acpi_ut_initialize_buffer(output_buffer, list_size_needed);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Do the conversion */

	status = acpi_rs_convert_aml_to_resources(aml_start, aml_buffer_length,
						  output_buffer->pointer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "output_buffer %p Length %X\n",
			  output_buffer->pointer, (u32) output_buffer->length));
	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_create_pci_routing_table
 *
 * PARAMETERS:  package_object          - Pointer to an union acpi_operand_object
 *                                        package
 *              output_buffer           - Pointer to the user's buffer
 *
 * RETURN:      Status  AE_OK if okay, else a valid acpi_status code.
 *              If the output_buffer is too small, the error will be
 *              AE_BUFFER_OVERFLOW and output_buffer->Length will point
 *              to the size buffer needed.
 *
 * DESCRIPTION: Takes the union acpi_operand_object    package and creates a
 *              linked list of PCI interrupt descriptions
 *
 * NOTE: It is the caller's responsibility to ensure that the start of the
 * output buffer is aligned properly (if necessary).
 *
 ******************************************************************************/

acpi_status
acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
				 struct acpi_buffer *output_buffer)
{
	u8 *buffer;
	union acpi_operand_object **top_object_list;
	union acpi_operand_object **sub_object_list;
	union acpi_operand_object *obj_desc;
	acpi_size buffer_size_needed = 0;
	u32 number_of_elements;
	u32 index;
	struct acpi_pci_routing_table *user_prt;
	struct acpi_namespace_node *node;
	acpi_status status;
	struct acpi_buffer path_buffer;

	ACPI_FUNCTION_TRACE("rs_create_pci_routing_table");

	/* Params already validated, so we don't re-validate here */

	/* Get the required buffer length */

	status = acpi_rs_get_pci_routing_table_length(package_object,
						      &buffer_size_needed);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "buffer_size_needed = %X\n",
			  (u32) buffer_size_needed));

	/* Validate/Allocate/Clear caller buffer */

	status = acpi_ut_initialize_buffer(output_buffer, buffer_size_needed);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * Loop through the ACPI_INTERNAL_OBJECTS - Each object
	 * should be a package that in turn contains an
	 * acpi_integer Address, a u8 Pin, a Name and a u8 source_index.
	 */
	top_object_list = package_object->package.elements;
	number_of_elements = package_object->package.count;
	buffer = output_buffer->pointer;
	user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);

	for (index = 0; index < number_of_elements; index++) {
		/*
		 * Point user_prt past this current structure
		 *
		 * NOTE: On the first iteration, user_prt->Length will
		 * be zero because we cleared the return buffer earlier
		 */
		buffer += user_prt->length;
		user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);

		/*
		 * Fill in the Length field with the information we have at this point.
		 * The minus four is to subtract the size of the u8 Source[4] member
		 * because it is added below.
		 */
		user_prt->length = (sizeof(struct acpi_pci_routing_table) - 4);

		/* Each element of the top-level package must also be a package */

		if (ACPI_GET_OBJECT_TYPE(*top_object_list) != ACPI_TYPE_PACKAGE) {
			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					  "(PRT[%X]) Need sub-package, found %s\n",
					  index,
					  acpi_ut_get_object_type_name
					  (*top_object_list)));
			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
		}

		/* Each sub-package must be of length 4 */

		if ((*top_object_list)->package.count != 4) {
			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					  "(PRT[%X]) Need package of length 4, found length %d\n",
					  index,
					  (*top_object_list)->package.count));
			return_ACPI_STATUS(AE_AML_PACKAGE_LIMIT);
		}

		/*
		 * Dereference the sub-package.
		 * The sub_object_list will now point to an array of the four IRQ
		 * elements: [Address, Pin, Source, source_index]
		 */
		sub_object_list = (*top_object_list)->package.elements;

		/* 1) First subobject: Dereference the PRT.Address */

		obj_desc = sub_object_list[0];
		if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
			user_prt->address = obj_desc->integer.value;
		} else {
			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					  "(PRT[%X].Address) Need Integer, found %s\n",
					  index,
					  acpi_ut_get_object_type_name
					  (obj_desc)));
			return_ACPI_STATUS(AE_BAD_DATA);
		}

		/* 2) Second subobject: Dereference the PRT.Pin */

		obj_desc = sub_object_list[1];
		if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
			user_prt->pin = (u32) obj_desc->integer.value;
		} else {
			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					  "(PRT[%X].Pin) Need Integer, found %s\n",
					  index,
					  acpi_ut_get_object_type_name
					  (obj_desc)));
			return_ACPI_STATUS(AE_BAD_DATA);
		}

		/* 3) Third subobject: Dereference the PRT.source_name */

		obj_desc = sub_object_list[2];
		switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
		case ACPI_TYPE_LOCAL_REFERENCE:

			if (obj_desc->reference.opcode != AML_INT_NAMEPATH_OP) {
				ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
						  "(PRT[%X].Source) Need name, found reference op %X\n",
						  index,
						  obj_desc->reference.opcode));
				return_ACPI_STATUS(AE_BAD_DATA);
			}

			node = obj_desc->reference.node;

			/* Use *remaining* length of the buffer as max for pathname */

			path_buffer.length = output_buffer->length -
			    (u32) ((u8 *) user_prt->source -
				   (u8 *) output_buffer->pointer);
			path_buffer.pointer = user_prt->source;

			status =
			    acpi_ns_handle_to_pathname((acpi_handle) node,
						       &path_buffer);

			/* +1 to include null terminator */

			user_prt->length +=
			    (u32) ACPI_STRLEN(user_prt->source) + 1;
			break;

		case ACPI_TYPE_STRING:

			ACPI_STRCPY(user_prt->source, obj_desc->string.pointer);

			/*
			 * Add to the Length field the length of the string
			 * (add 1 for terminator)
			 */
			user_prt->length += obj_desc->string.length + 1;
			break;

		case ACPI_TYPE_INTEGER:
			/*
			 * If this is a number, then the Source Name is NULL, since the
			 * entire buffer was zeroed out, we can leave this alone.
			 *
			 * Add to the Length field the length of the u32 NULL
			 */
			user_prt->length += sizeof(u32);
			break;

		default:

			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					  "(PRT[%X].Source) Need Ref/String/Integer, found %s\n",
					  index,
					  acpi_ut_get_object_type_name
					  (obj_desc)));
			return_ACPI_STATUS(AE_BAD_DATA);
		}

		/* Now align the current length */

		user_prt->length =
		    (u32) ACPI_ROUND_UP_to_64_bITS(user_prt->length);

		/* 4) Fourth subobject: Dereference the PRT.source_index */

		obj_desc = sub_object_list[3];
		if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
			user_prt->source_index = (u32) obj_desc->integer.value;
		} else {
			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					  "(PRT[%X].source_index) Need Integer, found %s\n",
					  index,
					  acpi_ut_get_object_type_name
					  (obj_desc)));
			return_ACPI_STATUS(AE_BAD_DATA);
		}

		/* Point to the next union acpi_operand_object in the top level package */

		top_object_list++;
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "output_buffer %p Length %X\n",
			  output_buffer->pointer, (u32) output_buffer->length));
	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_create_aml_resources
 *
 * PARAMETERS:  linked_list_buffer      - Pointer to the resource linked list
 *              output_buffer           - Pointer to the user's buffer
 *
 * RETURN:      Status  AE_OK if okay, else a valid acpi_status code.
 *              If the output_buffer is too small, the error will be
 *              AE_BUFFER_OVERFLOW and output_buffer->Length will point
 *              to the size buffer needed.
 *
 * DESCRIPTION: Takes the linked list of device resources and
 *              creates a bytestream to be used as input for the
 *              _SRS control method.
 *
 ******************************************************************************/

acpi_status
acpi_rs_create_aml_resources(struct acpi_resource *linked_list_buffer,
			     struct acpi_buffer *output_buffer)
{
	acpi_status status;
	acpi_size aml_size_needed = 0;

	ACPI_FUNCTION_TRACE("rs_create_aml_resources");

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "linked_list_buffer = %p\n",
			  linked_list_buffer));

	/*
	 * Params already validated, so we don't re-validate here
	 *
	 * Pass the linked_list_buffer into a module that calculates
	 * the buffer size needed for the byte stream.
	 */
	status = acpi_rs_get_aml_length(linked_list_buffer, &aml_size_needed);

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "aml_size_needed=%X, %s\n",
			  (u32) aml_size_needed,
			  acpi_format_exception(status)));
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Validate/Allocate/Clear caller buffer */

	status = acpi_ut_initialize_buffer(output_buffer, aml_size_needed);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Do the conversion */

	status =
	    acpi_rs_convert_resources_to_aml(linked_list_buffer,
					     aml_size_needed,
					     output_buffer->pointer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "output_buffer %p Length %X\n",
			  output_buffer->pointer, (u32) output_buffer->length));
	return_ACPI_STATUS(AE_OK);
}
Commit	Line	Data
1da177e4 LT	1	/*******************************************************************************
	2	*
	3	* Module Name: rscreate - Create resource lists/tables
	4	*
	5	******************************************************************************/
	6
	7	/*
	8	* Copyright (C) 2000 - 2005, R. Byron Moore
	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
1da177e4 LT	44	#include <acpi/acpi.h>
	45	#include <acpi/acresrc.h>
	46	#include <acpi/amlcode.h>
	47	#include <acpi/acnamesp.h>
	48
	49	#define _COMPONENT ACPI_RESOURCES
4be44fcd	50	ACPI_MODULE_NAME("rscreate")
1da177e4 LT	51
	52	/*******************************************************************************
	53	*
	54	* FUNCTION: acpi_rs_create_resource_list
	55	*
50eca3eb BM	56	* PARAMETERS: aml_buffer - Pointer to the resource byte stream
50eca3eb BM	57	* output_buffer - Pointer to the user's buffer
1da177e4	58	*
50eca3eb	59	* RETURN: Status: AE_OK if okay, else a valid acpi_status code
1da177e4 LT	60	* If output_buffer is not large enough, output_buffer_length
	61	* indicates how large output_buffer should be, else it
	62	* indicates how may u8 elements of output_buffer are valid.
	63	*
	64	* DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
	65	* execution and parses the stream to create a linked list
	66	* of device resources.
	67	*
	68	******************************************************************************/
1da177e4	69	acpi_status
50eca3eb	70	acpi_rs_create_resource_list(union acpi_operand_object *aml_buffer,
4be44fcd	71	struct acpi_buffer *output_buffer)
1da177e4 LT	72	{
1da177e4 LT	73
4be44fcd	74	acpi_status status;
50eca3eb	75	u8 *aml_start;
4be44fcd	76	acpi_size list_size_needed = 0;
50eca3eb	77	u32 aml_buffer_length;
1da177e4	78
4be44fcd	79	ACPI_FUNCTION_TRACE("rs_create_resource_list");
1da177e4	80
50eca3eb	81	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "aml_buffer = %p\n", aml_buffer));
1da177e4	82
44f6c012 RM	83	/* Params already validated, so we don't re-validate here */
44f6c012 RM	84
50eca3eb BM	85	aml_buffer_length = aml_buffer->buffer.length;
50eca3eb BM	86	aml_start = aml_buffer->buffer.pointer;
1da177e4 LT	87
1da177e4 LT	88	/*
50eca3eb	89	* Pass the aml_buffer into a module that can calculate
1da177e4 LT	90	* the buffer size needed for the linked list
1da177e4 LT	91	*/
50eca3eb BM	92	status = acpi_rs_get_list_length(aml_start, aml_buffer_length,
50eca3eb BM	93	&list_size_needed);
4be44fcd LB	94
	95	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Status=%X list_size_needed=%X\n",
	96	status, (u32) list_size_needed));
	97	if (ACPI_FAILURE(status)) {
	98	return_ACPI_STATUS(status);
1da177e4 LT	99	}
	100
	101	/* Validate/Allocate/Clear caller buffer */
	102
4be44fcd LB	103	status = acpi_ut_initialize_buffer(output_buffer, list_size_needed);
	104	if (ACPI_FAILURE(status)) {
	105	return_ACPI_STATUS(status);
1da177e4 LT	106	}
	107
	108	/* Do the conversion */
	109
50eca3eb BM	110	status = acpi_rs_convert_aml_to_resources(aml_start, aml_buffer_length,
50eca3eb BM	111	output_buffer->pointer);
4be44fcd LB	112	if (ACPI_FAILURE(status)) {
4be44fcd LB	113	return_ACPI_STATUS(status);
1da177e4 LT	114	}
1da177e4 LT	115
4be44fcd LB	116	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "output_buffer %p Length %X\n",
	117	output_buffer->pointer, (u32) output_buffer->length));
	118	return_ACPI_STATUS(AE_OK);
1da177e4 LT	119	}
1da177e4 LT	120
1da177e4 LT	121	/*******************************************************************************
	122	*
	123	* FUNCTION: acpi_rs_create_pci_routing_table
	124	*
	125	* PARAMETERS: package_object - Pointer to an union acpi_operand_object
	126	* package
	127	* output_buffer - Pointer to the user's buffer
	128	*
	129	* RETURN: Status AE_OK if okay, else a valid acpi_status code.
	130	* If the output_buffer is too small, the error will be
	131	* AE_BUFFER_OVERFLOW and output_buffer->Length will point
	132	* to the size buffer needed.
	133	*
	134	* DESCRIPTION: Takes the union acpi_operand_object package and creates a
	135	* linked list of PCI interrupt descriptions
	136	*
	137	* NOTE: It is the caller's responsibility to ensure that the start of the
	138	* output buffer is aligned properly (if necessary).
	139	*
	140	******************************************************************************/
	141
	142	acpi_status
4be44fcd LB	143	acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
4be44fcd LB	144	struct acpi_buffer *output_buffer)
1da177e4	145	{
4be44fcd LB	146	u8 *buffer;
	147	union acpi_operand_object **top_object_list;
	148	union acpi_operand_object **sub_object_list;
	149	union acpi_operand_object *obj_desc;
	150	acpi_size buffer_size_needed = 0;
	151	u32 number_of_elements;
	152	u32 index;
	153	struct acpi_pci_routing_table *user_prt;
	154	struct acpi_namespace_node *node;
	155	acpi_status status;
	156	struct acpi_buffer path_buffer;
	157
	158	ACPI_FUNCTION_TRACE("rs_create_pci_routing_table");
1da177e4 LT	159
	160	/* Params already validated, so we don't re-validate here */
	161
44f6c012 RM	162	/* Get the required buffer length */
44f6c012 RM	163
4be44fcd LB	164	status = acpi_rs_get_pci_routing_table_length(package_object,
	165	&buffer_size_needed);
	166	if (ACPI_FAILURE(status)) {
	167	return_ACPI_STATUS(status);
1da177e4 LT	168	}
1da177e4 LT	169
4be44fcd LB	170	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "buffer_size_needed = %X\n",
4be44fcd LB	171	(u32) buffer_size_needed));
1da177e4 LT	172
	173	/* Validate/Allocate/Clear caller buffer */
	174
4be44fcd LB	175	status = acpi_ut_initialize_buffer(output_buffer, buffer_size_needed);
	176	if (ACPI_FAILURE(status)) {
	177	return_ACPI_STATUS(status);
1da177e4 LT	178	}
	179
	180	/*
	181	* Loop through the ACPI_INTERNAL_OBJECTS - Each object
	182	* should be a package that in turn contains an
	183	* acpi_integer Address, a u8 Pin, a Name and a u8 source_index.
	184	*/
4be44fcd	185	top_object_list = package_object->package.elements;
1da177e4	186	number_of_elements = package_object->package.count;
4be44fcd LB	187	buffer = output_buffer->pointer;
4be44fcd LB	188	user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);
1da177e4 LT	189
	190	for (index = 0; index < number_of_elements; index++) {
	191	/*
	192	* Point user_prt past this current structure
	193	*
	194	* NOTE: On the first iteration, user_prt->Length will
	195	* be zero because we cleared the return buffer earlier
	196	*/
	197	buffer += user_prt->length;
4be44fcd	198	user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);
1da177e4 LT	199
	200	/*
	201	* Fill in the Length field with the information we have at this point.
	202	* The minus four is to subtract the size of the u8 Source[4] member
	203	* because it is added below.
	204	*/
4be44fcd	205	user_prt->length = (sizeof(struct acpi_pci_routing_table) - 4);
1da177e4	206
44f6c012 RM	207	/* Each element of the top-level package must also be a package */
44f6c012 RM	208
4be44fcd LB	209	if (ACPI_GET_OBJECT_TYPE(*top_object_list) != ACPI_TYPE_PACKAGE) {
	210	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	211	"(PRT[%X]) Need sub-package, found %s\n",
	212	index,
	213	acpi_ut_get_object_type_name
	214	(*top_object_list)));
	215	return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
1da177e4 LT	216	}
	217
	218	/* Each sub-package must be of length 4 */
	219
	220	if ((*top_object_list)->package.count != 4) {
4be44fcd LB	221	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	222	"(PRT[%X]) Need package of length 4, found length %d\n",
	223	index,
	224	(*top_object_list)->package.count));
	225	return_ACPI_STATUS(AE_AML_PACKAGE_LIMIT);
1da177e4 LT	226	}
	227
	228	/*
	229	* Dereference the sub-package.
	230	* The sub_object_list will now point to an array of the four IRQ
	231	* elements: [Address, Pin, Source, source_index]
	232	*/
	233	sub_object_list = (*top_object_list)->package.elements;
	234
44f6c012 RM	235	/* 1) First subobject: Dereference the PRT.Address */
44f6c012 RM	236
1da177e4	237	obj_desc = sub_object_list[0];
4be44fcd	238	if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
1da177e4	239	user_prt->address = obj_desc->integer.value;
4be44fcd LB	240	} else {
	241	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	242	"(PRT[%X].Address) Need Integer, found %s\n",
	243	index,
	244	acpi_ut_get_object_type_name
	245	(obj_desc)));
	246	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	247	}
1da177e4 LT	248
44f6c012 RM	249	/* 2) Second subobject: Dereference the PRT.Pin */
44f6c012 RM	250
1da177e4	251	obj_desc = sub_object_list[1];
4be44fcd	252	if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
1da177e4	253	user_prt->pin = (u32) obj_desc->integer.value;
4be44fcd LB	254	} else {
	255	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	256	"(PRT[%X].Pin) Need Integer, found %s\n",
	257	index,
	258	acpi_ut_get_object_type_name
	259	(obj_desc)));
	260	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	261	}
1da177e4 LT	262
44f6c012 RM	263	/* 3) Third subobject: Dereference the PRT.source_name */
44f6c012 RM	264
1da177e4	265	obj_desc = sub_object_list[2];
4be44fcd	266	switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
1da177e4 LT	267	case ACPI_TYPE_LOCAL_REFERENCE:
	268
	269	if (obj_desc->reference.opcode != AML_INT_NAMEPATH_OP) {
4be44fcd LB	270	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	271	"(PRT[%X].Source) Need name, found reference op %X\n",
	272	index,
	273	obj_desc->reference.opcode));
	274	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	275	}
	276
	277	node = obj_desc->reference.node;
	278
	279	/* Use remaining length of the buffer as max for pathname */
	280
	281	path_buffer.length = output_buffer->length -
4be44fcd LB	282	(u32) ((u8 *) user_prt->source -
4be44fcd LB	283	(u8 *) output_buffer->pointer);
1da177e4 LT	284	path_buffer.pointer = user_prt->source;
1da177e4 LT	285
4be44fcd LB	286	status =
	287	acpi_ns_handle_to_pathname((acpi_handle) node,
	288	&path_buffer);
1da177e4	289
44f6c012 RM	290	/* +1 to include null terminator */
44f6c012 RM	291
4be44fcd LB	292	user_prt->length +=
4be44fcd LB	293	(u32) ACPI_STRLEN(user_prt->source) + 1;
1da177e4 LT	294	break;
1da177e4 LT	295
1da177e4 LT	296	case ACPI_TYPE_STRING:
1da177e4 LT	297
4be44fcd	298	ACPI_STRCPY(user_prt->source, obj_desc->string.pointer);
1da177e4	299
44f6c012 RM	300	/*
	301	* Add to the Length field the length of the string
	302	* (add 1 for terminator)
	303	*/
1da177e4 LT	304	user_prt->length += obj_desc->string.length + 1;
	305	break;
	306
1da177e4 LT	307	case ACPI_TYPE_INTEGER:
	308	/*
	309	* If this is a number, then the Source Name is NULL, since the
	310	* entire buffer was zeroed out, we can leave this alone.
	311	*
	312	* Add to the Length field the length of the u32 NULL
	313	*/
4be44fcd	314	user_prt->length += sizeof(u32);
1da177e4 LT	315	break;
1da177e4 LT	316
1da177e4 LT	317	default:
1da177e4 LT	318
4be44fcd LB	319	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	320	"(PRT[%X].Source) Need Ref/String/Integer, found %s\n",
	321	index,
	322	acpi_ut_get_object_type_name
	323	(obj_desc)));
	324	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	325	}
	326
	327	/* Now align the current length */
	328
4be44fcd LB	329	user_prt->length =
4be44fcd LB	330	(u32) ACPI_ROUND_UP_to_64_bITS(user_prt->length);
1da177e4	331
44f6c012 RM	332	/* 4) Fourth subobject: Dereference the PRT.source_index */
44f6c012 RM	333
1da177e4	334	obj_desc = sub_object_list[3];
4be44fcd	335	if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
1da177e4	336	user_prt->source_index = (u32) obj_desc->integer.value;
4be44fcd LB	337	} else {
	338	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	339	"(PRT[%X].source_index) Need Integer, found %s\n",
	340	index,
	341	acpi_ut_get_object_type_name
	342	(obj_desc)));
	343	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	344	}
	345
	346	/* Point to the next union acpi_operand_object in the top level package */
	347
	348	top_object_list++;
	349	}
	350
4be44fcd LB	351	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "output_buffer %p Length %X\n",
	352	output_buffer->pointer, (u32) output_buffer->length));
	353	return_ACPI_STATUS(AE_OK);
1da177e4 LT	354	}
1da177e4 LT	355
1da177e4 LT	356	/*******************************************************************************
1da177e4 LT	357	*
50eca3eb	358	* FUNCTION: acpi_rs_create_aml_resources
1da177e4 LT	359	*
	360	* PARAMETERS: linked_list_buffer - Pointer to the resource linked list
	361	* output_buffer - Pointer to the user's buffer
	362	*
	363	* RETURN: Status AE_OK if okay, else a valid acpi_status code.
	364	* If the output_buffer is too small, the error will be
	365	* AE_BUFFER_OVERFLOW and output_buffer->Length will point
	366	* to the size buffer needed.
	367	*
	368	* DESCRIPTION: Takes the linked list of device resources and
	369	* creates a bytestream to be used as input for the
	370	* _SRS control method.
	371	*
	372	******************************************************************************/
	373
	374	acpi_status
50eca3eb BM	375	acpi_rs_create_aml_resources(struct acpi_resource *linked_list_buffer,
50eca3eb BM	376	struct acpi_buffer *output_buffer)
1da177e4	377	{
4be44fcd	378	acpi_status status;
50eca3eb	379	acpi_size aml_size_needed = 0;
1da177e4	380
50eca3eb	381	ACPI_FUNCTION_TRACE("rs_create_aml_resources");
1da177e4	382
4be44fcd LB	383	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "linked_list_buffer = %p\n",
4be44fcd LB	384	linked_list_buffer));
1da177e4 LT	385
	386	/*
	387	* Params already validated, so we don't re-validate here
	388	*
	389	* Pass the linked_list_buffer into a module that calculates
	390	* the buffer size needed for the byte stream.
	391	*/
50eca3eb	392	status = acpi_rs_get_aml_length(linked_list_buffer, &aml_size_needed);
4be44fcd	393
50eca3eb BM	394	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "aml_size_needed=%X, %s\n",
50eca3eb BM	395	(u32) aml_size_needed,
4be44fcd LB	396	acpi_format_exception(status)));
	397	if (ACPI_FAILURE(status)) {
	398	return_ACPI_STATUS(status);
1da177e4 LT	399	}
	400
	401	/* Validate/Allocate/Clear caller buffer */
	402
50eca3eb	403	status = acpi_ut_initialize_buffer(output_buffer, aml_size_needed);
4be44fcd LB	404	if (ACPI_FAILURE(status)) {
4be44fcd LB	405	return_ACPI_STATUS(status);
1da177e4 LT	406	}
	407
	408	/* Do the conversion */
	409
4be44fcd	410	status =
50eca3eb BM	411	acpi_rs_convert_resources_to_aml(linked_list_buffer,
	412	aml_size_needed,
	413	output_buffer->pointer);
4be44fcd LB	414	if (ACPI_FAILURE(status)) {
4be44fcd LB	415	return_ACPI_STATUS(status);
1da177e4 LT	416	}
1da177e4 LT	417
4be44fcd LB	418	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "output_buffer %p Length %X\n",
	419	output_buffer->pointer, (u32) output_buffer->length));
	420	return_ACPI_STATUS(AE_OK);
1da177e4	421	}