413 lines
14 KiB
C
413 lines
14 KiB
C
/*******************************************************************************
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*
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* Module Name: rsxface - Public interfaces to the resource manager
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <linux/module.h>
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#include <acpi/acpi.h>
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#include <acpi/acresrc.h>
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#define _COMPONENT ACPI_RESOURCES
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ACPI_MODULE_NAME("rsxface")
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/* Local macros for 16,32-bit to 64-bit conversion */
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#define ACPI_COPY_FIELD(out, in, field) ((out)->field = (in)->field)
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#define ACPI_COPY_ADDRESS(out, in) \
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ACPI_COPY_FIELD(out, in, resource_type); \
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ACPI_COPY_FIELD(out, in, producer_consumer); \
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ACPI_COPY_FIELD(out, in, decode); \
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ACPI_COPY_FIELD(out, in, min_address_fixed); \
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ACPI_COPY_FIELD(out, in, max_address_fixed); \
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ACPI_COPY_FIELD(out, in, info); \
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ACPI_COPY_FIELD(out, in, granularity); \
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ACPI_COPY_FIELD(out, in, minimum); \
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ACPI_COPY_FIELD(out, in, maximum); \
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ACPI_COPY_FIELD(out, in, translation_offset); \
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ACPI_COPY_FIELD(out, in, address_length); \
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ACPI_COPY_FIELD(out, in, resource_source);
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_irq_routing_table
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*
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* PARAMETERS: device_handle - a handle to the Bus device we are querying
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* ret_buffer - a pointer to a buffer to receive the
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* current resources for the device
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to get the IRQ routing table for a
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* specific bus. The caller must first acquire a handle for the
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* desired bus. The routine table is placed in the buffer pointed
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* to by the ret_buffer variable parameter.
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*
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* If the function fails an appropriate status will be returned
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* and the value of ret_buffer is undefined.
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*
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* This function attempts to execute the _PRT method contained in
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* the object indicated by the passed device_handle.
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*
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******************************************************************************/
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acpi_status
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acpi_get_irq_routing_table(acpi_handle device_handle,
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struct acpi_buffer *ret_buffer)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE("acpi_get_irq_routing_table ");
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/*
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* Must have a valid handle and buffer, So we have to have a handle
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* and a return buffer structure, and if there is a non-zero buffer length
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* we also need a valid pointer in the buffer. If it's a zero buffer length,
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* we'll be returning the needed buffer size, so keep going.
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*/
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if (!device_handle) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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status = acpi_ut_validate_buffer(ret_buffer);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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status = acpi_rs_get_prt_method_data(device_handle, ret_buffer);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_current_resources
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*
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* PARAMETERS: device_handle - a handle to the device object for the
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* device we are querying
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* ret_buffer - a pointer to a buffer to receive the
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* current resources for the device
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to get the current resources for a
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* specific device. The caller must first acquire a handle for
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* the desired device. The resource data is placed in the buffer
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* pointed to by the ret_buffer variable parameter.
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*
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* If the function fails an appropriate status will be returned
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* and the value of ret_buffer is undefined.
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*
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* This function attempts to execute the _CRS method contained in
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* the object indicated by the passed device_handle.
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*
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******************************************************************************/
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acpi_status
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acpi_get_current_resources(acpi_handle device_handle,
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struct acpi_buffer *ret_buffer)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE("acpi_get_current_resources");
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/*
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* Must have a valid handle and buffer, So we have to have a handle
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* and a return buffer structure, and if there is a non-zero buffer length
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* we also need a valid pointer in the buffer. If it's a zero buffer length,
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* we'll be returning the needed buffer size, so keep going.
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*/
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if (!device_handle) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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status = acpi_ut_validate_buffer(ret_buffer);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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status = acpi_rs_get_crs_method_data(device_handle, ret_buffer);
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return_ACPI_STATUS(status);
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}
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EXPORT_SYMBOL(acpi_get_current_resources);
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_possible_resources
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*
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* PARAMETERS: device_handle - a handle to the device object for the
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* device we are querying
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* ret_buffer - a pointer to a buffer to receive the
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* resources for the device
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to get a list of the possible resources
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* for a specific device. The caller must first acquire a handle
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* for the desired device. The resource data is placed in the
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* buffer pointed to by the ret_buffer variable.
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*
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* If the function fails an appropriate status will be returned
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* and the value of ret_buffer is undefined.
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*
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******************************************************************************/
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#ifdef ACPI_FUTURE_USAGE
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acpi_status
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acpi_get_possible_resources(acpi_handle device_handle,
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struct acpi_buffer *ret_buffer)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE("acpi_get_possible_resources");
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/*
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* Must have a valid handle and buffer, So we have to have a handle
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* and a return buffer structure, and if there is a non-zero buffer length
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* we also need a valid pointer in the buffer. If it's a zero buffer length,
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* we'll be returning the needed buffer size, so keep going.
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*/
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if (!device_handle) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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status = acpi_ut_validate_buffer(ret_buffer);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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status = acpi_rs_get_prs_method_data(device_handle, ret_buffer);
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return_ACPI_STATUS(status);
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}
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EXPORT_SYMBOL(acpi_get_possible_resources);
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#endif /* ACPI_FUTURE_USAGE */
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/*******************************************************************************
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*
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* FUNCTION: acpi_walk_resources
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*
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* PARAMETERS: device_handle - a handle to the device object for the
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* device we are querying
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* Path - method name of the resources we want
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* (METHOD_NAME__CRS or METHOD_NAME__PRS)
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* user_function - called for each resource
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* Context - passed to user_function
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*
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* RETURN: Status
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*
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* DESCRIPTION: Retrieves the current or possible resource list for the
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* specified device. The user_function is called once for
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* each resource in the list.
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*
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******************************************************************************/
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acpi_status
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acpi_walk_resources(acpi_handle device_handle,
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char *path,
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ACPI_WALK_RESOURCE_CALLBACK user_function, void *context)
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{
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acpi_status status;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_resource *resource;
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struct acpi_resource *buffer_end;
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ACPI_FUNCTION_TRACE("acpi_walk_resources");
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if (!device_handle ||
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(ACPI_STRNCMP(path, METHOD_NAME__CRS, sizeof(METHOD_NAME__CRS)) &&
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ACPI_STRNCMP(path, METHOD_NAME__PRS, sizeof(METHOD_NAME__PRS)))) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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status = acpi_rs_get_method_data(device_handle, path, &buffer);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Setup pointers */
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resource = (struct acpi_resource *)buffer.pointer;
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buffer_end = ACPI_CAST_PTR(struct acpi_resource,
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((u8 *) buffer.pointer + buffer.length));
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/* Walk the resource list */
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for (;;) {
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if (!resource || resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
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break;
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}
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status = user_function(resource, context);
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switch (status) {
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case AE_OK:
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case AE_CTRL_DEPTH:
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/* Just keep going */
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status = AE_OK;
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break;
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case AE_CTRL_TERMINATE:
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/* Exit now, with OK stats */
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status = AE_OK;
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goto cleanup;
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default:
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/* All others are valid exceptions */
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goto cleanup;
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}
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/* Get the next resource descriptor */
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resource = ACPI_NEXT_RESOURCE(resource);
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/* Check for end-of-buffer */
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if (resource >= buffer_end) {
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goto cleanup;
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}
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}
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cleanup:
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acpi_os_free(buffer.pointer);
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return_ACPI_STATUS(status);
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}
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EXPORT_SYMBOL(acpi_walk_resources);
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/*******************************************************************************
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*
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* FUNCTION: acpi_set_current_resources
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*
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* PARAMETERS: device_handle - a handle to the device object for the
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* device we are changing the resources of
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* in_buffer - a pointer to a buffer containing the
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* resources to be set for the device
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to set the current resources for a
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* specific device. The caller must first acquire a handle for
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* the desired device. The resource data is passed to the routine
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* the buffer pointed to by the in_buffer variable.
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*
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******************************************************************************/
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acpi_status
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acpi_set_current_resources(acpi_handle device_handle,
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struct acpi_buffer *in_buffer)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE("acpi_set_current_resources");
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/* Must have a valid handle and buffer */
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if ((!device_handle) ||
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(!in_buffer) || (!in_buffer->pointer) || (!in_buffer->length)) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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status = acpi_rs_set_srs_method_data(device_handle, in_buffer);
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return_ACPI_STATUS(status);
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}
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EXPORT_SYMBOL(acpi_set_current_resources);
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/******************************************************************************
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*
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* FUNCTION: acpi_resource_to_address64
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*
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* PARAMETERS: Resource - Pointer to a resource
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* Out - Pointer to the users's return
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* buffer (a struct
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* struct acpi_resource_address64)
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*
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* RETURN: Status
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*
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* DESCRIPTION: If the resource is an address16, address32, or address64,
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* copy it to the address64 return buffer. This saves the
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* caller from having to duplicate code for different-sized
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* addresses.
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*
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******************************************************************************/
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acpi_status
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acpi_resource_to_address64(struct acpi_resource *resource,
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struct acpi_resource_address64 *out)
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{
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struct acpi_resource_address16 *address16;
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struct acpi_resource_address32 *address32;
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switch (resource->type) {
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case ACPI_RESOURCE_TYPE_ADDRESS16:
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address16 = (struct acpi_resource_address16 *)&resource->data;
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ACPI_COPY_ADDRESS(out, address16);
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break;
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case ACPI_RESOURCE_TYPE_ADDRESS32:
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address32 = (struct acpi_resource_address32 *)&resource->data;
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ACPI_COPY_ADDRESS(out, address32);
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break;
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case ACPI_RESOURCE_TYPE_ADDRESS64:
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/* Simple copy for 64 bit source */
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ACPI_MEMCPY(out, &resource->data,
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sizeof(struct acpi_resource_address64));
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break;
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default:
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return (AE_BAD_PARAMETER);
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}
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return (AE_OK);
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}
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EXPORT_SYMBOL(acpi_resource_to_address64);
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