[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / acpica / rscreate.c

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

/*
 * Copyright (C) 2000 - 2013, 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 "acresrc.h"
#include "acnamesp.h"

#define _COMPONENT          ACPI_RESOURCES
ACPI_MODULE_NAME("rscreate")

/*******************************************************************************
 *
 * FUNCTION:    acpi_buffer_to_resource
 *
 * PARAMETERS:  aml_buffer          - Pointer to the resource byte stream
 *              aml_buffer_length   - Length of the aml_buffer
 *              resource_ptr        - Where the converted resource is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert a raw AML buffer to a resource list
 *
 ******************************************************************************/
acpi_status
acpi_buffer_to_resource(u8 *aml_buffer,
			u16 aml_buffer_length,
			struct acpi_resource **resource_ptr)
{
	acpi_status status;
	acpi_size list_size_needed;
	void *resource;
	void *current_resource_ptr;

	/*
	 * Note: we allow AE_AML_NO_RESOURCE_END_TAG, since an end tag
	 * is not required here.
	 */

	/* Get the required length for the converted resource */

	status = acpi_rs_get_list_length(aml_buffer, aml_buffer_length,
					 &list_size_needed);
	if (status == AE_AML_NO_RESOURCE_END_TAG) {
		status = AE_OK;
	}
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	/* Allocate a buffer for the converted resource */

	resource = ACPI_ALLOCATE_ZEROED(list_size_needed);
	current_resource_ptr = resource;
	if (!resource) {
		return (AE_NO_MEMORY);
	}

	/* Perform the AML-to-Resource conversion */

	status = acpi_ut_walk_aml_resources(NULL, aml_buffer, aml_buffer_length,
					    acpi_rs_convert_aml_to_resources,
					    &current_resource_ptr);
	if (status == AE_AML_NO_RESOURCE_END_TAG) {
		status = AE_OK;
	}
	if (ACPI_FAILURE(status)) {
		ACPI_FREE(resource);
	} else {
		*resource_ptr = resource;
	}

	return (status);
}

/*******************************************************************************
 *
 * 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;
	void *resource;

	ACPI_FUNCTION_TRACE(rs_create_resource_list);

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "AmlBuffer = %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 ListSizeNeeded=%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 */

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

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %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 a package containing one
 *                                        of more ACPI_OPERAND_OBJECTs
 *              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, "BufferSizeNeeded = %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 u64 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 ((*top_object_list)->common.type != ACPI_TYPE_PACKAGE) {
			ACPI_ERROR((AE_INFO,
				    "(PRT[%u]) Need sub-package, found %s",
				    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_ERROR((AE_INFO,
				    "(PRT[%u]) Need package of length 4, found length %u",
				    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 (obj_desc->common.type != ACPI_TYPE_INTEGER) {
			ACPI_ERROR((AE_INFO,
				    "(PRT[%u].Address) Need Integer, found %s",
				    index,
				    acpi_ut_get_object_type_name(obj_desc)));
			return_ACPI_STATUS(AE_BAD_DATA);
		}

		user_prt->address = obj_desc->integer.value;

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

		obj_desc = sub_object_list[1];
		if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
			ACPI_ERROR((AE_INFO,
				    "(PRT[%u].Pin) Need Integer, found %s",
				    index,
				    acpi_ut_get_object_type_name(obj_desc)));
			return_ACPI_STATUS(AE_BAD_DATA);
		}

		user_prt->pin = (u32) obj_desc->integer.value;

		/*
		 * If the BIOS has erroneously reversed the _PRT source_name (index 2)
		 * and the source_index (index 3), fix it. _PRT is important enough to
		 * workaround this BIOS error. This also provides compatibility with
		 * other ACPI implementations.
		 */
		obj_desc = sub_object_list[3];
		if (!obj_desc || (obj_desc->common.type != ACPI_TYPE_INTEGER)) {
			sub_object_list[3] = sub_object_list[2];
			sub_object_list[2] = obj_desc;

			ACPI_WARNING((AE_INFO,
				      "(PRT[%X].Source) SourceName and SourceIndex are reversed, fixed",
				      index));
		}

		/*
		 * 3) Third subobject: Dereference the PRT.source_name
		 * The name may be unresolved (slack mode), so allow a null object
		 */
		obj_desc = sub_object_list[2];
		if (obj_desc) {
			switch (obj_desc->common.type) {
			case ACPI_TYPE_LOCAL_REFERENCE:

				if (obj_desc->reference.class !=
				    ACPI_REFCLASS_NAME) {
					ACPI_ERROR((AE_INFO,
						    "(PRT[%u].Source) Need name, found Reference Class 0x%X",
						    index,
						    obj_desc->reference.class));
					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_ERROR((AE_INFO,
					    "(PRT[%u].Source) Need Ref/String/Integer, found %s",
					    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_64BIT(user_prt->length);

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

		obj_desc = sub_object_list[3];
		if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
			ACPI_ERROR((AE_INFO,
				    "(PRT[%u].SourceIndex) Need Integer, found %s",
				    index,
				    acpi_ut_get_object_type_name(obj_desc)));
			return_ACPI_STATUS(AE_BAD_DATA);
		}

		user_prt->source_index = (u32) obj_desc->integer.value;

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

		top_object_list++;
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %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, "LinkedListBuffer = %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, "AmlSizeNeeded=%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, "OutputBuffer %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	/*
25f044e6	8	* Copyright (C) 2000 - 2013, Intel Corp.
1da177e4 LT	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	44	#include <acpi/acpi.h>
e2f7a777 LB	45	#include "accommon.h"
	46	#include "acresrc.h"
	47	#include "acnamesp.h"
1da177e4 LT	48
1da177e4 LT	49	#define _COMPONENT ACPI_RESOURCES
4be44fcd	50	ACPI_MODULE_NAME("rscreate")
1da177e4	51
0e243178 BM	52	/*******************************************************************************
	53	*
	54	* FUNCTION: acpi_buffer_to_resource
	55	*
	56	* PARAMETERS: aml_buffer - Pointer to the resource byte stream
	57	* aml_buffer_length - Length of the aml_buffer
	58	* resource_ptr - Where the converted resource is returned
	59	*
	60	* RETURN: Status
	61	*
	62	* DESCRIPTION: Convert a raw AML buffer to a resource list
	63	*
	64	******************************************************************************/
	65	acpi_status
	66	acpi_buffer_to_resource(u8 *aml_buffer,
	67	u16 aml_buffer_length,
	68	struct acpi_resource **resource_ptr)
	69	{
	70	acpi_status status;
	71	acpi_size list_size_needed;
	72	void *resource;
	73	void *current_resource_ptr;
	74
	75	/*
	76	* Note: we allow AE_AML_NO_RESOURCE_END_TAG, since an end tag
	77	* is not required here.
	78	*/
	79
	80	/* Get the required length for the converted resource */
	81
	82	status = acpi_rs_get_list_length(aml_buffer, aml_buffer_length,
	83	&list_size_needed);
	84	if (status == AE_AML_NO_RESOURCE_END_TAG) {
	85	status = AE_OK;
	86	}
	87	if (ACPI_FAILURE(status)) {
	88	return (status);
	89	}
	90
	91	/* Allocate a buffer for the converted resource */
	92
	93	resource = ACPI_ALLOCATE_ZEROED(list_size_needed);
	94	current_resource_ptr = resource;
	95	if (!resource) {
	96	return (AE_NO_MEMORY);
	97	}
	98
	99	/* Perform the AML-to-Resource conversion */
	100
886308ec	101	status = acpi_ut_walk_aml_resources(NULL, aml_buffer, aml_buffer_length,
0e243178 BM	102	acpi_rs_convert_aml_to_resources,
	103	&current_resource_ptr);
	104	if (status == AE_AML_NO_RESOURCE_END_TAG) {
	105	status = AE_OK;
	106	}
	107	if (ACPI_FAILURE(status)) {
	108	ACPI_FREE(resource);
	109	} else {
	110	*resource_ptr = resource;
	111	}
	112
	113	return (status);
	114	}
	115
1da177e4 LT	116	/*******************************************************************************
	117	*
	118	* FUNCTION: acpi_rs_create_resource_list
	119	*
50eca3eb BM	120	* PARAMETERS: aml_buffer - Pointer to the resource byte stream
50eca3eb BM	121	* output_buffer - Pointer to the user's buffer
1da177e4	122	*
50eca3eb	123	* RETURN: Status: AE_OK if okay, else a valid acpi_status code
1da177e4 LT	124	* If output_buffer is not large enough, output_buffer_length
	125	* indicates how large output_buffer should be, else it
	126	* indicates how may u8 elements of output_buffer are valid.
	127	*
	128	* DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
	129	* execution and parses the stream to create a linked list
	130	* of device resources.
	131	*
	132	******************************************************************************/
e0fe0a8d	133
1da177e4	134	acpi_status
50eca3eb	135	acpi_rs_create_resource_list(union acpi_operand_object *aml_buffer,
e0fe0a8d	136	struct acpi_buffer * output_buffer)
1da177e4 LT	137	{
1da177e4 LT	138
4be44fcd	139	acpi_status status;
50eca3eb	140	u8 *aml_start;
4be44fcd	141	acpi_size list_size_needed = 0;
50eca3eb	142	u32 aml_buffer_length;
61686124	143	void *resource;
1da177e4	144
b229cf92	145	ACPI_FUNCTION_TRACE(rs_create_resource_list);
1da177e4	146
b229cf92	147	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "AmlBuffer = %p\n", aml_buffer));
1da177e4	148
44f6c012 RM	149	/* Params already validated, so we don't re-validate here */
44f6c012 RM	150
50eca3eb BM	151	aml_buffer_length = aml_buffer->buffer.length;
50eca3eb BM	152	aml_start = aml_buffer->buffer.pointer;
1da177e4 LT	153
1da177e4 LT	154	/*
50eca3eb	155	* Pass the aml_buffer into a module that can calculate
1da177e4 LT	156	* the buffer size needed for the linked list
1da177e4 LT	157	*/
50eca3eb BM	158	status = acpi_rs_get_list_length(aml_start, aml_buffer_length,
50eca3eb BM	159	&list_size_needed);
4be44fcd	160
b229cf92	161	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Status=%X ListSizeNeeded=%X\n",
4be44fcd LB	162	status, (u32) list_size_needed));
	163	if (ACPI_FAILURE(status)) {
	164	return_ACPI_STATUS(status);
1da177e4 LT	165	}
	166
	167	/* Validate/Allocate/Clear caller buffer */
	168
4be44fcd LB	169	status = acpi_ut_initialize_buffer(output_buffer, list_size_needed);
	170	if (ACPI_FAILURE(status)) {
	171	return_ACPI_STATUS(status);
1da177e4 LT	172	}
	173
	174	/* Do the conversion */
	175
61686124	176	resource = output_buffer->pointer;
886308ec	177	status = acpi_ut_walk_aml_resources(NULL, aml_start, aml_buffer_length,
61686124 BM	178	acpi_rs_convert_aml_to_resources,
61686124 BM	179	&resource);
4be44fcd LB	180	if (ACPI_FAILURE(status)) {
4be44fcd LB	181	return_ACPI_STATUS(status);
1da177e4 LT	182	}
1da177e4 LT	183
b229cf92	184	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
4be44fcd LB	185	output_buffer->pointer, (u32) output_buffer->length));
4be44fcd LB	186	return_ACPI_STATUS(AE_OK);
1da177e4 LT	187	}
1da177e4 LT	188
1da177e4 LT	189	/*******************************************************************************
	190	*
	191	* FUNCTION: acpi_rs_create_pci_routing_table
	192	*
cf48958e BM	193	* PARAMETERS: package_object - Pointer to a package containing one
cf48958e BM	194	* of more ACPI_OPERAND_OBJECTs
1da177e4 LT	195	* output_buffer - Pointer to the user's buffer
	196	*
	197	* RETURN: Status AE_OK if okay, else a valid acpi_status code.
	198	* If the output_buffer is too small, the error will be
	199	* AE_BUFFER_OVERFLOW and output_buffer->Length will point
	200	* to the size buffer needed.
	201	*
cf48958e	202	* DESCRIPTION: Takes the union acpi_operand_object package and creates a
1da177e4 LT	203	* linked list of PCI interrupt descriptions
	204	*
	205	* NOTE: It is the caller's responsibility to ensure that the start of the
	206	* output buffer is aligned properly (if necessary).
	207	*
	208	******************************************************************************/
	209
	210	acpi_status
4be44fcd LB	211	acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
4be44fcd LB	212	struct acpi_buffer *output_buffer)
1da177e4	213	{
4be44fcd LB	214	u8 *buffer;
	215	union acpi_operand_object **top_object_list;
	216	union acpi_operand_object **sub_object_list;
	217	union acpi_operand_object *obj_desc;
	218	acpi_size buffer_size_needed = 0;
	219	u32 number_of_elements;
	220	u32 index;
	221	struct acpi_pci_routing_table *user_prt;
	222	struct acpi_namespace_node *node;
	223	acpi_status status;
	224	struct acpi_buffer path_buffer;
	225
b229cf92	226	ACPI_FUNCTION_TRACE(rs_create_pci_routing_table);
1da177e4 LT	227
	228	/* Params already validated, so we don't re-validate here */
	229
44f6c012 RM	230	/* Get the required buffer length */
44f6c012 RM	231
4be44fcd LB	232	status = acpi_rs_get_pci_routing_table_length(package_object,
	233	&buffer_size_needed);
	234	if (ACPI_FAILURE(status)) {
	235	return_ACPI_STATUS(status);
1da177e4 LT	236	}
1da177e4 LT	237
b229cf92	238	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "BufferSizeNeeded = %X\n",
4be44fcd	239	(u32) buffer_size_needed));
1da177e4 LT	240
	241	/* Validate/Allocate/Clear caller buffer */
	242
4be44fcd LB	243	status = acpi_ut_initialize_buffer(output_buffer, buffer_size_needed);
	244	if (ACPI_FAILURE(status)) {
	245	return_ACPI_STATUS(status);
1da177e4 LT	246	}
	247
	248	/*
fd0a4327	249	* Loop through the ACPI_INTERNAL_OBJECTS - Each object should be a
5df7e6cb	250	* package that in turn contains an u64 Address, a u8 Pin,
fd0a4327	251	* a Name, and a u8 source_index.
1da177e4	252	*/
4be44fcd	253	top_object_list = package_object->package.elements;
1da177e4	254	number_of_elements = package_object->package.count;
4be44fcd LB	255	buffer = output_buffer->pointer;
4be44fcd LB	256	user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);
1da177e4 LT	257
1da177e4 LT	258	for (index = 0; index < number_of_elements; index++) {
2f894ef9	259
1da177e4 LT	260	/*
	261	* Point user_prt past this current structure
	262	*
	263	* NOTE: On the first iteration, user_prt->Length will
	264	* be zero because we cleared the return buffer earlier
	265	*/
	266	buffer += user_prt->length;
4be44fcd	267	user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);
1da177e4 LT	268
	269	/*
	270	* Fill in the Length field with the information we have at this point.
	271	* The minus four is to subtract the size of the u8 Source[4] member
	272	* because it is added below.
	273	*/
4be44fcd	274	user_prt->length = (sizeof(struct acpi_pci_routing_table) - 4);
1da177e4	275
44f6c012 RM	276	/* Each element of the top-level package must also be a package */
44f6c012 RM	277
3371c19c	278	if ((*top_object_list)->common.type != ACPI_TYPE_PACKAGE) {
b8e4d893	279	ACPI_ERROR((AE_INFO,
f6a22b0b	280	"(PRT[%u]) Need sub-package, found %s",
b8e4d893 BM	281	index,
	282	acpi_ut_get_object_type_name
	283	(*top_object_list)));
4be44fcd	284	return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
1da177e4 LT	285	}
	286
	287	/* Each sub-package must be of length 4 */
	288
	289	if ((*top_object_list)->package.count != 4) {
b8e4d893	290	ACPI_ERROR((AE_INFO,
f6a22b0b	291	"(PRT[%u]) Need package of length 4, found length %u",
b8e4d893	292	index, (*top_object_list)->package.count));
4be44fcd	293	return_ACPI_STATUS(AE_AML_PACKAGE_LIMIT);
1da177e4 LT	294	}
	295
	296	/*
	297	* Dereference the sub-package.
	298	* The sub_object_list will now point to an array of the four IRQ
	299	* elements: [Address, Pin, Source, source_index]
	300	*/
	301	sub_object_list = (*top_object_list)->package.elements;
	302
44f6c012 RM	303	/* 1) First subobject: Dereference the PRT.Address */
44f6c012 RM	304
1da177e4	305	obj_desc = sub_object_list[0];
3371c19c	306	if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
b8e4d893	307	ACPI_ERROR((AE_INFO,
f6a22b0b	308	"(PRT[%u].Address) Need Integer, found %s",
b8e4d893 BM	309	index,
b8e4d893 BM	310	acpi_ut_get_object_type_name(obj_desc)));
4be44fcd	311	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	312	}
1da177e4 LT	313
fd0a4327 BM	314	user_prt->address = obj_desc->integer.value;
fd0a4327 BM	315
44f6c012 RM	316	/* 2) Second subobject: Dereference the PRT.Pin */
44f6c012 RM	317
1da177e4	318	obj_desc = sub_object_list[1];
3371c19c	319	if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
b8e4d893	320	ACPI_ERROR((AE_INFO,
f6a22b0b	321	"(PRT[%u].Pin) Need Integer, found %s",
b8e4d893 BM	322	index,
b8e4d893 BM	323	acpi_ut_get_object_type_name(obj_desc)));
4be44fcd	324	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	325	}
1da177e4 LT	326
fd0a4327 BM	327	user_prt->pin = (u32) obj_desc->integer.value;
fd0a4327 BM	328
d0e184ab BM	329	/*
	330	* If the BIOS has erroneously reversed the _PRT source_name (index 2)
	331	* and the source_index (index 3), fix it. _PRT is important enough to
	332	* workaround this BIOS error. This also provides compatibility with
	333	* other ACPI implementations.
	334	*/
	335	obj_desc = sub_object_list[3];
3371c19c	336	if (!obj_desc \|\| (obj_desc->common.type != ACPI_TYPE_INTEGER)) {
d0e184ab BM	337	sub_object_list[3] = sub_object_list[2];
	338	sub_object_list[2] = obj_desc;
	339
	340	ACPI_WARNING((AE_INFO,
	341	"(PRT[%X].Source) SourceName and SourceIndex are reversed, fixed",
	342	index));
	343	}
	344
b8e4d893 BM	345	/*
	346	* 3) Third subobject: Dereference the PRT.source_name
	347	* The name may be unresolved (slack mode), so allow a null object
	348	*/
82babbb3	349	obj_desc = sub_object_list[2];
b8e4d893	350	if (obj_desc) {
3371c19c	351	switch (obj_desc->common.type) {
b8e4d893 BM	352	case ACPI_TYPE_LOCAL_REFERENCE:
b8e4d893 BM	353
1044f1f6 BM	354	if (obj_desc->reference.class !=
1044f1f6 BM	355	ACPI_REFCLASS_NAME) {
b8e4d893	356	ACPI_ERROR((AE_INFO,
f6a22b0b	357	"(PRT[%u].Source) Need name, found Reference Class 0x%X",
b8e4d893	358	index,
1044f1f6	359	obj_desc->reference.class));
b8e4d893 BM	360	return_ACPI_STATUS(AE_BAD_DATA);
	361	}
	362
	363	node = obj_desc->reference.node;
	364
	365	/* Use remaining length of the buffer as max for pathname */
	366
	367	path_buffer.length = output_buffer->length -
	368	(u32) ((u8 *) user_prt->source -
	369	(u8 *) output_buffer->pointer);
	370	path_buffer.pointer = user_prt->source;
	371
	372	status =
	373	acpi_ns_handle_to_pathname((acpi_handle)
	374	node,
	375	&path_buffer);
	376
	377	/* +1 to include null terminator */
	378
	379	user_prt->length +=
	380	(u32) ACPI_STRLEN(user_prt->source) + 1;
	381	break;
	382
	383	case ACPI_TYPE_STRING:
	384
	385	ACPI_STRCPY(user_prt->source,
	386	obj_desc->string.pointer);
	387
	388	/*
	389	* Add to the Length field the length of the string
	390	* (add 1 for terminator)
	391	*/
	392	user_prt->length += obj_desc->string.length + 1;
	393	break;
	394
	395	case ACPI_TYPE_INTEGER:
	396	/*
	397	* If this is a number, then the Source Name is NULL, since the
	398	* entire buffer was zeroed out, we can leave this alone.
	399	*
	400	* Add to the Length field the length of the u32 NULL
	401	*/
	402	user_prt->length += sizeof(u32);
	403	break;
	404
	405	default:
	406
	407	ACPI_ERROR((AE_INFO,
f6a22b0b	408	"(PRT[%u].Source) Need Ref/String/Integer, found %s",
b8e4d893 BM	409	index,
	410	acpi_ut_get_object_type_name
	411	(obj_desc)));
4be44fcd	412	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4	413	}
1da177e4 LT	414	}
	415
	416	/* Now align the current length */
	417
4be44fcd	418	user_prt->length =
958dd242	419	(u32) ACPI_ROUND_UP_TO_64BIT(user_prt->length);
1da177e4	420
44f6c012 RM	421	/* 4) Fourth subobject: Dereference the PRT.source_index */
44f6c012 RM	422
82babbb3	423	obj_desc = sub_object_list[3];
3371c19c	424	if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
b8e4d893	425	ACPI_ERROR((AE_INFO,
f6a22b0b	426	"(PRT[%u].SourceIndex) Need Integer, found %s",
b8e4d893 BM	427	index,
b8e4d893 BM	428	acpi_ut_get_object_type_name(obj_desc)));
4be44fcd	429	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	430	}
1da177e4 LT	431
fd0a4327 BM	432	user_prt->source_index = (u32) obj_desc->integer.value;
fd0a4327 BM	433
1da177e4 LT	434	/* Point to the next union acpi_operand_object in the top level package */
	435
	436	top_object_list++;
	437	}
	438
b229cf92	439	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
4be44fcd LB	440	output_buffer->pointer, (u32) output_buffer->length));
4be44fcd LB	441	return_ACPI_STATUS(AE_OK);
1da177e4 LT	442	}
1da177e4 LT	443
1da177e4 LT	444	/*******************************************************************************
1da177e4 LT	445	*
50eca3eb	446	* FUNCTION: acpi_rs_create_aml_resources
1da177e4 LT	447	*
	448	* PARAMETERS: linked_list_buffer - Pointer to the resource linked list
	449	* output_buffer - Pointer to the user's buffer
	450	*
	451	* RETURN: Status AE_OK if okay, else a valid acpi_status code.
	452	* If the output_buffer is too small, the error will be
	453	* AE_BUFFER_OVERFLOW and output_buffer->Length will point
	454	* to the size buffer needed.
	455	*
	456	* DESCRIPTION: Takes the linked list of device resources and
	457	* creates a bytestream to be used as input for the
	458	* _SRS control method.
	459	*
	460	******************************************************************************/
	461
	462	acpi_status
50eca3eb BM	463	acpi_rs_create_aml_resources(struct acpi_resource *linked_list_buffer,
50eca3eb BM	464	struct acpi_buffer *output_buffer)
1da177e4	465	{
4be44fcd	466	acpi_status status;
50eca3eb	467	acpi_size aml_size_needed = 0;
1da177e4	468
b229cf92	469	ACPI_FUNCTION_TRACE(rs_create_aml_resources);
1da177e4	470
b229cf92	471	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "LinkedListBuffer = %p\n",
4be44fcd	472	linked_list_buffer));
1da177e4 LT	473
	474	/*
	475	* Params already validated, so we don't re-validate here
	476	*
	477	* Pass the linked_list_buffer into a module that calculates
	478	* the buffer size needed for the byte stream.
	479	*/
50eca3eb	480	status = acpi_rs_get_aml_length(linked_list_buffer, &aml_size_needed);
4be44fcd	481
b229cf92	482	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "AmlSizeNeeded=%X, %s\n",
3e8214e5	483	(u32)aml_size_needed, acpi_format_exception(status)));
4be44fcd LB	484	if (ACPI_FAILURE(status)) {
4be44fcd LB	485	return_ACPI_STATUS(status);
1da177e4 LT	486	}
	487
	488	/* Validate/Allocate/Clear caller buffer */
	489
50eca3eb	490	status = acpi_ut_initialize_buffer(output_buffer, aml_size_needed);
4be44fcd LB	491	if (ACPI_FAILURE(status)) {
4be44fcd LB	492	return_ACPI_STATUS(status);
1da177e4 LT	493	}
	494
	495	/* Do the conversion */
	496
4be44fcd	497	status =
50eca3eb BM	498	acpi_rs_convert_resources_to_aml(linked_list_buffer,
	499	aml_size_needed,
	500	output_buffer->pointer);
4be44fcd LB	501	if (ACPI_FAILURE(status)) {
4be44fcd LB	502	return_ACPI_STATUS(status);
1da177e4 LT	503	}
1da177e4 LT	504
b229cf92	505	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
4be44fcd LB	506	output_buffer->pointer, (u32) output_buffer->length));
4be44fcd LB	507	return_ACPI_STATUS(AE_OK);
1da177e4	508	}