rsxface.c

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

/*
 * Copyright (C) 2000 - 2007, 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/acnamesp.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, info);                      \
	ACPI_COPY_FIELD(out, in, granularity);               \
	ACPI_COPY_FIELD(out, in, minimum);                   \
	ACPI_COPY_FIELD(out, in, maximum);                   \
	ACPI_COPY_FIELD(out, in, translation_offset);        \
	ACPI_COPY_FIELD(out, in, address_length);            \
	ACPI_COPY_FIELD(out, in, resource_source);
/* Local prototypes */
static acpi_status
acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context);

static acpi_status
acpi_rs_validate_parameters(acpi_handle device_handle,
			    struct acpi_buffer *buffer,
			    struct acpi_namespace_node **return_node);

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_validate_parameters
 *
 * PARAMETERS:  device_handle   - Handle to a device
 *              Buffer          - Pointer to a data buffer
 *              return_node     - Pointer to where the device node is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Common parameter validation for resource interfaces
 *
 ******************************************************************************/

static acpi_status
acpi_rs_validate_parameters(acpi_handle device_handle,
			    struct acpi_buffer *buffer,
			    struct acpi_namespace_node **return_node)
{
	acpi_status status;
	struct acpi_namespace_node *node;

	ACPI_FUNCTION_TRACE(rs_validate_parameters);

	/*
	 * Must have a valid handle to an ACPI device
	 */
	if (!device_handle) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	node = acpi_ns_map_handle_to_node(device_handle);
	if (!node) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	if (node->type != ACPI_TYPE_DEVICE) {
		return_ACPI_STATUS(AE_TYPE);
	}

	/*
	 * Validate the user buffer object
	 *
	 * 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 (later), so keep going.
	 */
	status = acpi_ut_validate_buffer(buffer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	*return_node = node;
	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_irq_routing_table
 *
 * PARAMETERS:  device_handle   - Handle to the Bus device we are querying
 *              ret_buffer      - 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;
	struct acpi_namespace_node *node;

	ACPI_FUNCTION_TRACE(acpi_get_irq_routing_table);

	/* Validate parameters then dispatch to internal routine */

	status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

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

ACPI_EXPORT_SYMBOL(acpi_get_irq_routing_table)

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_current_resources
 *
 * PARAMETERS:  device_handle   - Handle to the device object for the
 *                                device we are querying
 *              ret_buffer      - 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;
	struct acpi_namespace_node *node;

	ACPI_FUNCTION_TRACE(acpi_get_current_resources);

	/* Validate parameters then dispatch to internal routine */

	status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

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

ACPI_EXPORT_SYMBOL(acpi_get_current_resources)
#ifdef ACPI_FUTURE_USAGE
/*******************************************************************************
 *
 * FUNCTION:    acpi_get_possible_resources
 *
 * PARAMETERS:  device_handle   - Handle to the device object for the
 *                                device we are querying
 *              ret_buffer      - 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.
 *
 ******************************************************************************/
acpi_status
acpi_get_possible_resources(acpi_handle device_handle,
			    struct acpi_buffer *ret_buffer)
{
	acpi_status status;
	struct acpi_namespace_node *node;

	ACPI_FUNCTION_TRACE(acpi_get_possible_resources);

	/* Validate parameters then dispatch to internal routine */

	status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

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

ACPI_EXPORT_SYMBOL(acpi_get_possible_resources)
#endif				/*  ACPI_FUTURE_USAGE  */
/*******************************************************************************
 *
 * FUNCTION:    acpi_set_current_resources
 *
 * PARAMETERS:  device_handle   - Handle to the device object for the
 *                                device we are setting resources
 *              in_buffer       - 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;
	struct acpi_namespace_node *node;