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/*******************************************************************************

 *

 * Module Name: rslist - Linked list utilities

 *

 ******************************************************************************/

/*

 * 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.

 */

#include 

#include "accommon.h"

#include "acresrc.h"

#define _COMPONENT          ACPI_RESOURCES

ACPI_MODULE_NAME("rslist")

/*******************************************************************************

 *

 * FUNCTION:    acpi_rs_convert_aml_to_resources

 *

 * PARAMETERS:  acpi_walk_aml_callback

 *              resource_ptr            - Pointer to the buffer that will

 *                                        contain the output structures

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Convert an AML resource to an internal representation of the

 *              resource that is aligned and easier to access.

 *

 ******************************************************************************/

acpi_status

acpi_rs_convert_aml_to_resources(u8 * aml,

				 u32 length,

				 u32 offset, u8 resource_index, void **context)

{

	struct acpi_resource **resource_ptr =

	    ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context);

	struct acpi_resource *resource;

	union aml_resource *aml_resource;

	struct acpi_rsconvert_info *conversion_table;

	acpi_status status;

	ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources);

	/*

	 * Check that the input buffer and all subsequent pointers into it

	 * are aligned on a native word boundary. Most important on IA64

	 */

	resource = *resource_ptr;

	if (ACPI_IS_MISALIGNED(resource)) {

		ACPI_WARNING((AE_INFO,

			      "Misaligned resource pointer %p", resource));

	}

	/* Get the appropriate conversion info table */

	aml_resource = ACPI_CAST_PTR(union aml_resource, aml);

	if (acpi_ut_get_resource_type(aml) == ACPI_RESOURCE_NAME_SERIAL_BUS) {

		if (aml_resource->common_serial_bus.type >

		    AML_RESOURCE_MAX_SERIALBUSTYPE) {

			conversion_table = NULL;

		} else {

			/* This is an I2C, SPI, or UART serial_bus descriptor */

			conversion_table =

			    acpi_gbl_convert_resource_serial_bus_dispatch

			    [aml_resource->common_serial_bus.type];

		}

	} else {

		conversion_table =

		    acpi_gbl_get_resource_dispatch[resource_index];

	}

	if (!conversion_table) {

		ACPI_ERROR((AE_INFO,

			    "Invalid/unsupported resource descriptor: Type 0x%2.2X",

			    resource_index));

		return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);

	}

	/* Convert the AML byte stream resource to a local resource struct */

	status =

	    acpi_rs_convert_aml_to_resource(resource, aml_resource,

					    conversion_table);

	if (ACPI_FAILURE(status)) {

		ACPI_EXCEPTION((AE_INFO, status,

				"Could not convert AML resource (Type 0x%X)",

				*aml));

		return_ACPI_STATUS(status);

	}

	ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,

			  "Type %.2X, AmlLength %.2X InternalLength %.2X\n",

			  acpi_ut_get_resource_type(aml), length,

			  resource->length));

	/* Point to the next structure in the output buffer */

	*resource_ptr = ACPI_NEXT_RESOURCE(resource);

	return_ACPI_STATUS(AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_rs_convert_resources_to_aml

 *

 * PARAMETERS:  resource            - Pointer to the resource linked list

 *              aml_size_needed     - Calculated size of the byte stream

 *                                    needed from calling acpi_rs_get_aml_length()

 *                                    The size of the output_buffer is

 *                                    guaranteed to be >= aml_size_needed

 *              output_buffer       - Pointer to the buffer that will

 *                                    contain the byte stream

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Takes the resource linked list and parses it, creating a

 *              byte stream of resources in the caller's output buffer

 *

 ******************************************************************************/

acpi_status

acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,

				 acpi_size aml_size_needed, u8 * output_buffer)

{

	u8 *aml = output_buffer;

	u8 *end_aml = output_buffer + aml_size_needed;

	struct acpi_rsconvert_info *conversion_table;

	acpi_status status;

	ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml);

	/* Walk the resource descriptor list, convert each descriptor */

	while (aml < end_aml) {

		/* Validate the (internal) Resource Type */

		if (resource->type > ACPI_RESOURCE_TYPE_MAX) {

			ACPI_ERROR((AE_INFO,

				    "Invalid descriptor type (0x%X) in resource list",

				    resource->type));

			return_ACPI_STATUS(AE_BAD_DATA);

		}

		/* Sanity check the length. It must not be zero, or we loop forever */

		if (!resource->length) {

			ACPI_ERROR((AE_INFO,

				    "Invalid zero length descriptor in resource list\n"));

			return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);

		}

		/* Perform the conversion */

		if (resource->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {

			if (resource->data.common_serial_bus.type >

			    AML_RESOURCE_MAX_SERIALBUSTYPE) {

				conversion_table = NULL;

			} else {

				/* This is an I2C, SPI, or UART serial_bus descriptor */

				conversion_table =

				    acpi_gbl_convert_resource_serial_bus_dispatch

				    [resource->data.common_serial_bus.type];

			}

		} else {

			conversion_table =

			    acpi_gbl_set_resource_dispatch[resource->type];

		}

		if (!conversion_table) {

			ACPI_ERROR((AE_INFO,

				    "Invalid/unsupported resource descriptor: Type 0x%2.2X",

				    resource->type));

			return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);

		}

		status = acpi_rs_convert_resource_to_aml(resource,

						         ACPI_CAST_PTR(union

								       aml_resource,

								       aml),

							 conversion_table);

		if (ACPI_FAILURE(status)) {

			ACPI_EXCEPTION((AE_INFO, status,

					"Could not convert resource (type 0x%X) to AML",

					resource->type));

			return_ACPI_STATUS(status);

		}

		/* Perform final sanity check on the new AML resource descriptor */

		status = acpi_ut_validate_resource(NULL,

						   ACPI_CAST_PTR(union

								 aml_resource,

								 aml), NULL);

		if (ACPI_FAILURE(status)) {

			return_ACPI_STATUS(status);

		}

		/* Check for end-of-list, normal exit */

		if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {

			/* An End Tag indicates the end of the input Resource Template */

			return_ACPI_STATUS(AE_OK);

		}

		/*

		 * Extract the total length of the new descriptor and set the

		 * Aml to point to the next (output) resource descriptor

		 */

		aml += acpi_ut_get_descriptor_length(aml);

		/* Point to the next input resource descriptor */

		resource = ACPI_NEXT_RESOURCE(resource);

	}

	/* Completed buffer, but did not find an end_tag resource descriptor */

	return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);

}