[mirror_ubuntu-artful-kernel.git] / drivers / acpi / resources / rsxface.c

/*******************************************************************************
 *
 * Module Name: rsxface - Public interfaces to the resource manager
 *
 ******************************************************************************/

/*
 * 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 <linux/module.h>

#include <acpi/acpi.h>
#include <acpi/acresrc.h>

#define _COMPONENT          ACPI_RESOURCES
ACPI_MODULE_NAME("rsxface")

/* Local macros for 16,32-bit to 64-bit conversion */
#define ACPI_COPY_FIELD(out, in, field)  ((out)->field = (in)->field)
#define ACPI_COPY_ADDRESS(out, in)                      \
	ACPI_COPY_FIELD(out, in, resource_type);             \
	ACPI_COPY_FIELD(out, in, producer_consumer);         \
	ACPI_COPY_FIELD(out, in, decode);                    \
	ACPI_COPY_FIELD(out, in, min_address_fixed);         \
	ACPI_COPY_FIELD(out, in, max_address_fixed);         \
	ACPI_COPY_FIELD(out, in, attribute);                 \
	ACPI_COPY_FIELD(out, in, granularity);               \
	ACPI_COPY_FIELD(out, in, min_address_range);         \
	ACPI_COPY_FIELD(out, in, max_address_range);         \
	ACPI_COPY_FIELD(out, in, address_translation_offset); \
	ACPI_COPY_FIELD(out, in, address_length);            \
	ACPI_COPY_FIELD(out, in, resource_source);
/*******************************************************************************
 *
 * FUNCTION:    acpi_get_irq_routing_table
 *
 * PARAMETERS:  device_handle   - a handle to the Bus device we are querying
 *              ret_buffer      - a pointer to a buffer to receive the
 *                                current resources for the device
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to get the IRQ routing table for a
 *              specific bus.  The caller must first acquire a handle for the
 *              desired bus.  The routine table is placed in the buffer pointed
 *              to by the ret_buffer variable parameter.
 *
 *              If the function fails an appropriate status will be returned
 *              and the value of ret_buffer is undefined.
 *
 *              This function attempts to execute the _PRT method contained in
 *              the object indicated by the passed device_handle.
 *
 ******************************************************************************/
acpi_status
acpi_get_irq_routing_table(acpi_handle device_handle,
			   struct acpi_buffer *ret_buffer)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE("acpi_get_irq_routing_table ");

	/*
	 * Must have a valid handle and buffer, So we have to have a handle
	 * and a return buffer structure, and if there is a non-zero buffer length
	 * we also need a valid pointer in the buffer. If it's a zero buffer length,
	 * we'll be returning the needed buffer size, so keep going.
	 */
	if (!device_handle) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	status = acpi_ut_validate_buffer(ret_buffer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	status = acpi_rs_get_prt_method_data(device_handle, ret_buffer);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_current_resources
 *
 * PARAMETERS:  device_handle   - a handle to the device object for the
 *                                device we are querying
 *              ret_buffer      - a pointer to a buffer to receive the
 *                                current resources for the device
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to get the current resources for a
 *              specific device.  The caller must first acquire a handle for
 *              the desired device.  The resource data is placed in the buffer
 *              pointed to by the ret_buffer variable parameter.
 *
 *              If the function fails an appropriate status will be returned
 *              and the value of ret_buffer is undefined.
 *
 *              This function attempts to execute the _CRS method contained in
 *              the object indicated by the passed device_handle.
 *
 ******************************************************************************/

acpi_status
acpi_get_current_resources(acpi_handle device_handle,
			   struct acpi_buffer *ret_buffer)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE("acpi_get_current_resources");

	/*
	 * Must have a valid handle and buffer, So we have to have a handle
	 * and a return buffer structure, and if there is a non-zero buffer length
	 * we also need a valid pointer in the buffer. If it's a zero buffer length,
	 * we'll be returning the needed buffer size, so keep going.
	 */
	if (!device_handle) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	status = acpi_ut_validate_buffer(ret_buffer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	status = acpi_rs_get_crs_method_data(device_handle, ret_buffer);
	return_ACPI_STATUS(status);
}

EXPORT_SYMBOL(acpi_get_current_resources);

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_possible_resources
 *
 * PARAMETERS:  device_handle   - a handle to the device object for the
 *                                device we are querying
 *              ret_buffer      - a pointer to a buffer to receive the
 *                                resources for the device
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to get a list of the possible resources
 *              for a specific device.  The caller must first acquire a handle
 *              for the desired device.  The resource data is placed in the
 *              buffer pointed to by the ret_buffer variable.
 *
 *              If the function fails an appropriate status will be returned
 *              and the value of ret_buffer is undefined.
 *
 ******************************************************************************/

#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_get_possible_resources(acpi_handle device_handle,
			    struct acpi_buffer *ret_buffer)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE("acpi_get_possible_resources");

	/*
	 * Must have a valid handle and buffer, So we have to have a handle
	 * and a return buffer structure, and if there is a non-zero buffer length
	 * we also need a valid pointer in the buffer. If it's a zero buffer length,
	 * we'll be returning the needed buffer size, so keep going.
	 */
	if (!device_handle) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	status = acpi_ut_validate_buffer(ret_buffer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	status = acpi_rs_get_prs_method_data(device_handle, ret_buffer);
	return_ACPI_STATUS(status);
}

EXPORT_SYMBOL(acpi_get_possible_resources);
#endif				/*  ACPI_FUTURE_USAGE  */

/*******************************************************************************
 *
 * FUNCTION:    acpi_walk_resources
 *
 * PARAMETERS:  device_handle   - a handle to the device object for the
 *                                device we are querying
 *              Path            - method name of the resources we want
 *                                (METHOD_NAME__CRS or METHOD_NAME__PRS)
 *              user_function   - called for each resource
 *              Context         - passed to user_function
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Retrieves the current or possible resource list for the
 *              specified device.  The user_function is called once for
 *              each resource in the list.
 *
 ******************************************************************************/

acpi_status
acpi_walk_resources(acpi_handle device_handle,
		    char *path,
		    ACPI_WALK_RESOURCE_CALLBACK user_function, void *context)
{
	acpi_status status;
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	struct acpi_resource *resource;
	struct acpi_resource *buffer_end;

	ACPI_FUNCTION_TRACE("acpi_walk_resources");

	if (!device_handle ||
	    (ACPI_STRNCMP(path, METHOD_NAME__CRS, sizeof(METHOD_NAME__CRS)) &&
	     ACPI_STRNCMP(path, METHOD_NAME__PRS, sizeof(METHOD_NAME__PRS)))) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	status = acpi_rs_get_method_data(device_handle, path, &buffer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Setup pointers */

	resource = (struct acpi_resource *)buffer.pointer;
	buffer_end = ACPI_CAST_PTR(struct acpi_resource,
				   ((u8 *) buffer.pointer + buffer.length));

	/* Walk the resource list */

	for (;;) {
		if (!resource || resource->type == ACPI_RSTYPE_END_TAG) {
			break;
		}

		status = user_function(resource, context);

		switch (status) {
		case AE_OK:
		case AE_CTRL_DEPTH:

			/* Just keep going */

			status = AE_OK;
			break;

		case AE_CTRL_TERMINATE:

			/* Exit now, with OK stats */

			status = AE_OK;
			goto cleanup;

		default:

			/* All others are valid exceptions */

			goto cleanup;
		}

		/* Get the next resource descriptor */

		resource = ACPI_NEXT_RESOURCE(resource);

		/* Check for end-of-buffer */

		if (resource >= buffer_end) {
			goto cleanup;
		}
	}

      cleanup:

	acpi_os_free(buffer.pointer);
	return_ACPI_STATUS(status);
}

EXPORT_SYMBOL(acpi_walk_resources);

/*******************************************************************************
 *
 * FUNCTION:    acpi_set_current_resources
 *
 * PARAMETERS:  device_handle   - a handle to the device object for the
 *                                device we are changing the resources of
 *              in_buffer       - a pointer to a buffer containing the
 *                                resources to be set for the device
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to set the current resources for a
 *              specific device.  The caller must first acquire a handle for
 *              the desired device.  The resource data is passed to the routine
 *              the buffer pointed to by the in_buffer variable.
 *
 ******************************************************************************/

acpi_status
acpi_set_current_resources(acpi_handle device_handle,
			   struct acpi_buffer *in_buffer)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE("acpi_set_current_resources");

	/* Must have a valid handle and buffer */

	if ((!device_handle) ||
	    (!in_buffer) || (!in_buffer->pointer) || (!in_buffer->length)) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	status = acpi_rs_set_srs_method_data(device_handle, in_buffer);
	return_ACPI_STATUS(status);
}

EXPORT_SYMBOL(acpi_set_current_resources);

/******************************************************************************
 *
 * FUNCTION:    acpi_resource_to_address64
 *
 * PARAMETERS:  Resource                - Pointer to a resource
 *              Out                     - Pointer to the users's return
 *                                        buffer (a struct
 *                                        struct acpi_resource_address64)
 *
 * RETURN:      Status
 *
 * DESCRIPTION: If the resource is an address16, address32, or address64,
 *              copy it to the address64 return buffer.  This saves the
 *              caller from having to duplicate code for different-sized
 *              addresses.
 *
 ******************************************************************************/

acpi_status
acpi_resource_to_address64(struct acpi_resource *resource,
			   struct acpi_resource_address64 *out)
{
	struct acpi_resource_address16 *address16;
	struct acpi_resource_address32 *address32;

	switch (resource->type) {
	case ACPI_RSTYPE_ADDRESS16:

		address16 = (struct acpi_resource_address16 *)&resource->data;
		ACPI_COPY_ADDRESS(out, address16);
		break;

	case ACPI_RSTYPE_ADDRESS32:

		address32 = (struct acpi_resource_address32 *)&resource->data;
		ACPI_COPY_ADDRESS(out, address32);
		break;

	case ACPI_RSTYPE_ADDRESS64:

		/* Simple copy for 64 bit source */

		ACPI_MEMCPY(out, &resource->data,
			    sizeof(struct acpi_resource_address64));
		break;

	default:
		return (AE_BAD_PARAMETER);
	}

	return (AE_OK);
}

EXPORT_SYMBOL(acpi_resource_to_address64);
Commit	Line	Data
1da177e4 LT	1	/*******************************************************************************
	2	*
	3	* Module Name: rsxface - Public interfaces to the resource manager
	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
	44	#include <linux/module.h>
	45
	46	#include <acpi/acpi.h>
	47	#include <acpi/acresrc.h>
	48
	49	#define _COMPONENT ACPI_RESOURCES
4be44fcd	50	ACPI_MODULE_NAME("rsxface")
1da177e4	51
44f6c012	52	/* Local macros for 16,32-bit to 64-bit conversion */
44f6c012 RM	53	#define ACPI_COPY_FIELD(out, in, field) ((out)->field = (in)->field)
	54	#define ACPI_COPY_ADDRESS(out, in) \
	55	ACPI_COPY_FIELD(out, in, resource_type); \
	56	ACPI_COPY_FIELD(out, in, producer_consumer); \
	57	ACPI_COPY_FIELD(out, in, decode); \
	58	ACPI_COPY_FIELD(out, in, min_address_fixed); \
	59	ACPI_COPY_FIELD(out, in, max_address_fixed); \
	60	ACPI_COPY_FIELD(out, in, attribute); \
	61	ACPI_COPY_FIELD(out, in, granularity); \
	62	ACPI_COPY_FIELD(out, in, min_address_range); \
	63	ACPI_COPY_FIELD(out, in, max_address_range); \
	64	ACPI_COPY_FIELD(out, in, address_translation_offset); \
	65	ACPI_COPY_FIELD(out, in, address_length); \
	66	ACPI_COPY_FIELD(out, in, resource_source);
1da177e4 LT	67	/*******************************************************************************
	68	*
	69	* FUNCTION: acpi_get_irq_routing_table
	70	*
	71	* PARAMETERS: device_handle - a handle to the Bus device we are querying
	72	* ret_buffer - a pointer to a buffer to receive the
	73	* current resources for the device
	74	*
	75	* RETURN: Status
	76	*
	77	* DESCRIPTION: This function is called to get the IRQ routing table for a
	78	* specific bus. The caller must first acquire a handle for the
	79	* desired bus. The routine table is placed in the buffer pointed
	80	* to by the ret_buffer variable parameter.
	81	*
	82	* If the function fails an appropriate status will be returned
	83	* and the value of ret_buffer is undefined.
	84	*
	85	* This function attempts to execute the _PRT method contained in
	86	* the object indicated by the passed device_handle.
	87	*
	88	******************************************************************************/
1da177e4	89	acpi_status
4be44fcd LB	90	acpi_get_irq_routing_table(acpi_handle device_handle,
4be44fcd LB	91	struct acpi_buffer *ret_buffer)
1da177e4	92	{
4be44fcd	93	acpi_status status;
1da177e4	94
4be44fcd	95	ACPI_FUNCTION_TRACE("acpi_get_irq_routing_table ");
1da177e4 LT	96
	97	/*
	98	* Must have a valid handle and buffer, So we have to have a handle
	99	* and a return buffer structure, and if there is a non-zero buffer length
	100	* we also need a valid pointer in the buffer. If it's a zero buffer length,
	101	* we'll be returning the needed buffer size, so keep going.
	102	*/
	103	if (!device_handle) {
4be44fcd	104	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	105	}
1da177e4 LT	106
4be44fcd LB	107	status = acpi_ut_validate_buffer(ret_buffer);
	108	if (ACPI_FAILURE(status)) {
	109	return_ACPI_STATUS(status);
1da177e4 LT	110	}
1da177e4 LT	111
4be44fcd LB	112	status = acpi_rs_get_prt_method_data(device_handle, ret_buffer);
4be44fcd LB	113	return_ACPI_STATUS(status);
1da177e4 LT	114	}
1da177e4 LT	115
1da177e4 LT	116	/*******************************************************************************
	117	*
	118	* FUNCTION: acpi_get_current_resources
	119	*
	120	* PARAMETERS: device_handle - a handle to the device object for the
	121	* device we are querying
	122	* ret_buffer - a pointer to a buffer to receive the
	123	* current resources for the device
	124	*
	125	* RETURN: Status
	126	*
	127	* DESCRIPTION: This function is called to get the current resources for a
	128	* specific device. The caller must first acquire a handle for
	129	* the desired device. The resource data is placed in the buffer
	130	* pointed to by the ret_buffer variable parameter.
	131	*
	132	* If the function fails an appropriate status will be returned
	133	* and the value of ret_buffer is undefined.
	134	*
	135	* This function attempts to execute the _CRS method contained in
	136	* the object indicated by the passed device_handle.
	137	*
	138	******************************************************************************/
	139
	140	acpi_status
4be44fcd LB	141	acpi_get_current_resources(acpi_handle device_handle,
4be44fcd LB	142	struct acpi_buffer *ret_buffer)
1da177e4	143	{
4be44fcd	144	acpi_status status;
1da177e4	145
4be44fcd	146	ACPI_FUNCTION_TRACE("acpi_get_current_resources");
1da177e4 LT	147
	148	/*
	149	* Must have a valid handle and buffer, So we have to have a handle
	150	* and a return buffer structure, and if there is a non-zero buffer length
	151	* we also need a valid pointer in the buffer. If it's a zero buffer length,
	152	* we'll be returning the needed buffer size, so keep going.
	153	*/
	154	if (!device_handle) {
4be44fcd	155	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	156	}
1da177e4 LT	157
4be44fcd LB	158	status = acpi_ut_validate_buffer(ret_buffer);
	159	if (ACPI_FAILURE(status)) {
	160	return_ACPI_STATUS(status);
1da177e4 LT	161	}
1da177e4 LT	162
4be44fcd LB	163	status = acpi_rs_get_crs_method_data(device_handle, ret_buffer);
4be44fcd LB	164	return_ACPI_STATUS(status);
1da177e4	165	}
1da177e4	166
4be44fcd	167	EXPORT_SYMBOL(acpi_get_current_resources);
1da177e4 LT	168
	169	/*******************************************************************************
	170	*
	171	* FUNCTION: acpi_get_possible_resources
	172	*
	173	* PARAMETERS: device_handle - a handle to the device object for the
	174	* device we are querying
	175	* ret_buffer - a pointer to a buffer to receive the
	176	* resources for the device
	177	*
	178	* RETURN: Status
	179	*
	180	* DESCRIPTION: This function is called to get a list of the possible resources
	181	* for a specific device. The caller must first acquire a handle
	182	* for the desired device. The resource data is placed in the
	183	* buffer pointed to by the ret_buffer variable.
	184	*
	185	* If the function fails an appropriate status will be returned
	186	* and the value of ret_buffer is undefined.
	187	*
	188	******************************************************************************/
44f6c012	189
1da177e4 LT	190	#ifdef ACPI_FUTURE_USAGE
1da177e4 LT	191	acpi_status
4be44fcd LB	192	acpi_get_possible_resources(acpi_handle device_handle,
4be44fcd LB	193	struct acpi_buffer *ret_buffer)
1da177e4	194	{
4be44fcd	195	acpi_status status;
1da177e4	196
4be44fcd	197	ACPI_FUNCTION_TRACE("acpi_get_possible_resources");
1da177e4 LT	198
	199	/*
	200	* Must have a valid handle and buffer, So we have to have a handle
	201	* and a return buffer structure, and if there is a non-zero buffer length
	202	* we also need a valid pointer in the buffer. If it's a zero buffer length,
	203	* we'll be returning the needed buffer size, so keep going.
	204	*/
	205	if (!device_handle) {
4be44fcd	206	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	207	}
1da177e4 LT	208
4be44fcd LB	209	status = acpi_ut_validate_buffer(ret_buffer);
	210	if (ACPI_FAILURE(status)) {
	211	return_ACPI_STATUS(status);
1da177e4 LT	212	}
1da177e4 LT	213
4be44fcd LB	214	status = acpi_rs_get_prs_method_data(device_handle, ret_buffer);
4be44fcd LB	215	return_ACPI_STATUS(status);
1da177e4	216	}
1da177e4	217
4be44fcd LB	218	EXPORT_SYMBOL(acpi_get_possible_resources);
4be44fcd LB	219	#endif /* ACPI_FUTURE_USAGE */
1da177e4 LT	220
	221	/*******************************************************************************
	222	*
	223	* FUNCTION: acpi_walk_resources
	224	*
	225	* PARAMETERS: device_handle - a handle to the device object for the
	226	* device we are querying
	227	* Path - method name of the resources we want
	228	* (METHOD_NAME__CRS or METHOD_NAME__PRS)
	229	* user_function - called for each resource
	230	* Context - passed to user_function
	231	*
	232	* RETURN: Status
	233	*
	234	* DESCRIPTION: Retrieves the current or possible resource list for the
	235	* specified device. The user_function is called once for
	236	* each resource in the list.
	237	*
	238	******************************************************************************/
	239
	240	acpi_status
4be44fcd LB	241	acpi_walk_resources(acpi_handle device_handle,
	242	char *path,
	243	ACPI_WALK_RESOURCE_CALLBACK user_function, void *context)
1da177e4	244	{
4be44fcd LB	245	acpi_status status;
	246	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	247	struct acpi_resource *resource;
	248	struct acpi_resource *buffer_end;
1da177e4	249
4be44fcd	250	ACPI_FUNCTION_TRACE("acpi_walk_resources");
1da177e4 LT	251
1da177e4 LT	252	if (!device_handle \|\|
4be44fcd LB	253	(ACPI_STRNCMP(path, METHOD_NAME__CRS, sizeof(METHOD_NAME__CRS)) &&
	254	ACPI_STRNCMP(path, METHOD_NAME__PRS, sizeof(METHOD_NAME__PRS)))) {
	255	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	256	}
1da177e4 LT	257
4be44fcd LB	258	status = acpi_rs_get_method_data(device_handle, path, &buffer);
	259	if (ACPI_FAILURE(status)) {
	260	return_ACPI_STATUS(status);
1da177e4 LT	261	}
	262
	263	/* Setup pointers */
	264
4be44fcd LB	265	resource = (struct acpi_resource *)buffer.pointer;
	266	buffer_end = ACPI_CAST_PTR(struct acpi_resource,
	267	((u8 *) buffer.pointer + buffer.length));
1da177e4 LT	268
	269	/* Walk the resource list */
	270
	271	for (;;) {
bda663d3	272	if (!resource \|\| resource->type == ACPI_RSTYPE_END_TAG) {
1da177e4 LT	273	break;
	274	}
	275
4be44fcd	276	status = user_function(resource, context);
1da177e4 LT	277
	278	switch (status) {
	279	case AE_OK:
	280	case AE_CTRL_DEPTH:
	281
	282	/* Just keep going */
	283
	284	status = AE_OK;
	285	break;
	286
	287	case AE_CTRL_TERMINATE:
	288
	289	/* Exit now, with OK stats */
	290
	291	status = AE_OK;
	292	goto cleanup;
	293
	294	default:
	295
	296	/* All others are valid exceptions */
	297
	298	goto cleanup;
	299	}
	300
	301	/* Get the next resource descriptor */
	302
4be44fcd	303	resource = ACPI_NEXT_RESOURCE(resource);
1da177e4 LT	304
	305	/* Check for end-of-buffer */
	306
	307	if (resource >= buffer_end) {
	308	goto cleanup;
	309	}
	310	}
	311
4be44fcd	312	cleanup:
1da177e4	313
4be44fcd LB	314	acpi_os_free(buffer.pointer);
4be44fcd LB	315	return_ACPI_STATUS(status);
1da177e4	316	}
1da177e4	317
4be44fcd	318	EXPORT_SYMBOL(acpi_walk_resources);
1da177e4 LT	319
	320	/*******************************************************************************
	321	*
	322	* FUNCTION: acpi_set_current_resources
	323	*
	324	* PARAMETERS: device_handle - a handle to the device object for the
	325	* device we are changing the resources of
	326	* in_buffer - a pointer to a buffer containing the
	327	* resources to be set for the device
	328	*
	329	* RETURN: Status
	330	*
	331	* DESCRIPTION: This function is called to set the current resources for a
	332	* specific device. The caller must first acquire a handle for
	333	* the desired device. The resource data is passed to the routine
	334	* the buffer pointed to by the in_buffer variable.
	335	*
	336	******************************************************************************/
	337
	338	acpi_status
4be44fcd LB	339	acpi_set_current_resources(acpi_handle device_handle,
4be44fcd LB	340	struct acpi_buffer *in_buffer)
1da177e4	341	{
4be44fcd	342	acpi_status status;
1da177e4	343
4be44fcd	344	ACPI_FUNCTION_TRACE("acpi_set_current_resources");
1da177e4	345
44f6c012 RM	346	/* Must have a valid handle and buffer */
44f6c012 RM	347
4be44fcd LB	348	if ((!device_handle) \|\|
	349	(!in_buffer) \|\| (!in_buffer->pointer) \|\| (!in_buffer->length)) {
	350	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	351	}
1da177e4 LT	352
4be44fcd LB	353	status = acpi_rs_set_srs_method_data(device_handle, in_buffer);
4be44fcd LB	354	return_ACPI_STATUS(status);
1da177e4	355	}
1da177e4	356
4be44fcd	357	EXPORT_SYMBOL(acpi_set_current_resources);
1da177e4	358
1da177e4 LT	359	/******************************************************************************
	360	*
	361	* FUNCTION: acpi_resource_to_address64
	362	*
bda663d3 RM	363	* PARAMETERS: Resource - Pointer to a resource
bda663d3 RM	364	* Out - Pointer to the users's return
1da177e4 LT	365	* buffer (a struct
	366	* struct acpi_resource_address64)
	367	*
	368	* RETURN: Status
	369	*
	370	* DESCRIPTION: If the resource is an address16, address32, or address64,
	371	* copy it to the address64 return buffer. This saves the
	372	* caller from having to duplicate code for different-sized
	373	* addresses.
	374	*
	375	******************************************************************************/
	376
	377	acpi_status
4be44fcd LB	378	acpi_resource_to_address64(struct acpi_resource *resource,
4be44fcd LB	379	struct acpi_resource_address64 *out)
1da177e4	380	{
4be44fcd LB	381	struct acpi_resource_address16 *address16;
4be44fcd LB	382	struct acpi_resource_address32 *address32;
1da177e4	383
bda663d3	384	switch (resource->type) {
1da177e4 LT	385	case ACPI_RSTYPE_ADDRESS16:
1da177e4 LT	386
4be44fcd LB	387	address16 = (struct acpi_resource_address16 *)&resource->data;
4be44fcd LB	388	ACPI_COPY_ADDRESS(out, address16);
1da177e4 LT	389	break;
1da177e4 LT	390
1da177e4 LT	391	case ACPI_RSTYPE_ADDRESS32:
1da177e4 LT	392
4be44fcd LB	393	address32 = (struct acpi_resource_address32 *)&resource->data;
4be44fcd LB	394	ACPI_COPY_ADDRESS(out, address32);
1da177e4 LT	395	break;
1da177e4 LT	396
1da177e4 LT	397	case ACPI_RSTYPE_ADDRESS64:
	398
	399	/* Simple copy for 64 bit source */
	400
4be44fcd LB	401	ACPI_MEMCPY(out, &resource->data,
4be44fcd LB	402	sizeof(struct acpi_resource_address64));
1da177e4 LT	403	break;
1da177e4 LT	404
1da177e4 LT	405	default:
	406	return (AE_BAD_PARAMETER);
	407	}
	408
	409	return (AE_OK);
	410	}
4be44fcd	411
1da177e4	412	EXPORT_SYMBOL(acpi_resource_to_address64);