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Diffstat (limited to 'drivers/acpi/resources/rsutils.c')
| -rw-r--r-- | drivers/acpi/resources/rsutils.c | 356 |
1 files changed, 356 insertions, 0 deletions
diff --git a/drivers/acpi/resources/rsutils.c b/drivers/acpi/resources/rsutils.c new file mode 100644 index 000000000000..ee9ce13c053d --- /dev/null +++ b/drivers/acpi/resources/rsutils.c @@ -0,0 +1,356 @@ +/******************************************************************************* + * + * Module Name: rsutils - Utilities for 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 <acpi/acpi.h> +#include <acpi/acnamesp.h> +#include <acpi/acresrc.h> + + +#define _COMPONENT ACPI_RESOURCES + ACPI_MODULE_NAME ("rsutils") + + +/******************************************************************************* + * + * FUNCTION: acpi_rs_get_prt_method_data + * + * PARAMETERS: Handle - a handle to the containing object + * ret_buffer - a pointer to a buffer structure for the + * results + * + * RETURN: Status + * + * DESCRIPTION: This function is called to get the _PRT value of an object + * contained in an object specified by the handle passed in + * + * If the function fails an appropriate status will be returned + * and the contents of the callers buffer is undefined. + * + ******************************************************************************/ + +acpi_status +acpi_rs_get_prt_method_data ( + acpi_handle handle, + struct acpi_buffer *ret_buffer) +{ + union acpi_operand_object *obj_desc; + acpi_status status; + + + ACPI_FUNCTION_TRACE ("rs_get_prt_method_data"); + + + /* Parameters guaranteed valid by caller */ + + /* + * Execute the method, no parameters + */ + status = acpi_ut_evaluate_object (handle, "_PRT", ACPI_BTYPE_PACKAGE, &obj_desc); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* + * Create a resource linked list from the byte stream buffer that comes + * back from the _CRS method execution. + */ + status = acpi_rs_create_pci_routing_table (obj_desc, ret_buffer); + + /* On exit, we must delete the object returned by evaluate_object */ + + acpi_ut_remove_reference (obj_desc); + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_rs_get_crs_method_data + * + * PARAMETERS: Handle - a handle to the containing object + * ret_buffer - a pointer to a buffer structure for the + * results + * + * RETURN: Status + * + * DESCRIPTION: This function is called to get the _CRS value of an object + * contained in an object specified by the handle passed in + * + * If the function fails an appropriate status will be returned + * and the contents of the callers buffer is undefined. + * + ******************************************************************************/ + +acpi_status +acpi_rs_get_crs_method_data ( + acpi_handle handle, + struct acpi_buffer *ret_buffer) +{ + union acpi_operand_object *obj_desc; + acpi_status status; + + + ACPI_FUNCTION_TRACE ("rs_get_crs_method_data"); + + + /* Parameters guaranteed valid by caller */ + + /* + * Execute the method, no parameters + */ + status = acpi_ut_evaluate_object (handle, "_CRS", ACPI_BTYPE_BUFFER, &obj_desc); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* + * Make the call to create a resource linked list from the + * byte stream buffer that comes back from the _CRS method + * execution. + */ + status = acpi_rs_create_resource_list (obj_desc, ret_buffer); + + /* on exit, we must delete the object returned by evaluate_object */ + + acpi_ut_remove_reference (obj_desc); + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_rs_get_prs_method_data + * + * PARAMETERS: Handle - a handle to the containing object + * ret_buffer - a pointer to a buffer structure for the + * results + * + * RETURN: Status + * + * DESCRIPTION: This function is called to get the _PRS value of an object + * contained in an object specified by the handle passed in + * + * If the function fails an appropriate status will be returned + * and the contents of the callers buffer is undefined. + * + ******************************************************************************/ +#ifdef ACPI_FUTURE_USAGE +acpi_status +acpi_rs_get_prs_method_data ( + acpi_handle handle, + struct acpi_buffer *ret_buffer) +{ + union acpi_operand_object *obj_desc; + acpi_status status; + + + ACPI_FUNCTION_TRACE ("rs_get_prs_method_data"); + + + /* Parameters guaranteed valid by caller */ + + /* + * Execute the method, no parameters + */ + status = acpi_ut_evaluate_object (handle, "_PRS", ACPI_BTYPE_BUFFER, &obj_desc); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* + * Make the call to create a resource linked list from the + * byte stream buffer that comes back from the _CRS method + * execution. + */ + status = acpi_rs_create_resource_list (obj_desc, ret_buffer); + + /* on exit, we must delete the object returned by evaluate_object */ + + acpi_ut_remove_reference (obj_desc); + return_ACPI_STATUS (status); +} +#endif /* ACPI_FUTURE_USAGE */ + + +/******************************************************************************* + * + * FUNCTION: acpi_rs_get_method_data + * + * PARAMETERS: Handle - a handle to the containing object + * ret_buffer - a pointer to a buffer structure for the + * results + * + * RETURN: Status + * + * DESCRIPTION: This function is called to get the _CRS or _PRS value of an + * object contained in an object specified by the handle passed in + * + * If the function fails an appropriate status will be returned + * and the contents of the callers buffer is undefined. + * + ******************************************************************************/ + +acpi_status +acpi_rs_get_method_data ( + acpi_handle handle, + char *path, + struct acpi_buffer *ret_buffer) +{ + union acpi_operand_object *obj_desc; + acpi_status status; + + + ACPI_FUNCTION_TRACE ("rs_get_method_data"); + + + /* Parameters guaranteed valid by caller */ + + /* + * Execute the method, no parameters + */ + status = acpi_ut_evaluate_object (handle, path, ACPI_BTYPE_BUFFER, &obj_desc); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* + * Make the call to create a resource linked list from the + * byte stream buffer that comes back from the method + * execution. + */ + status = acpi_rs_create_resource_list (obj_desc, ret_buffer); + + /* On exit, we must delete the object returned by evaluate_object */ + + acpi_ut_remove_reference (obj_desc); + return_ACPI_STATUS (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_rs_set_srs_method_data + * + * PARAMETERS: Handle - a handle to the containing object + * in_buffer - a pointer to a buffer structure of the + * parameter + * + * RETURN: Status + * + * DESCRIPTION: This function is called to set the _SRS of an object contained + * in an object specified by the handle passed in + * + * If the function fails an appropriate status will be returned + * and the contents of the callers buffer is undefined. + * + ******************************************************************************/ + +acpi_status +acpi_rs_set_srs_method_data ( + acpi_handle handle, + struct acpi_buffer *in_buffer) +{ + struct acpi_parameter_info info; + union acpi_operand_object *params[2]; + acpi_status status; + struct acpi_buffer buffer; + + + ACPI_FUNCTION_TRACE ("rs_set_srs_method_data"); + + + /* Parameters guaranteed valid by caller */ + + /* + * The in_buffer parameter will point to a linked list of + * resource parameters. It needs to be formatted into a + * byte stream to be sent in as an input parameter to _SRS + * + * Convert the linked list into a byte stream + */ + buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; + status = acpi_rs_create_byte_stream (in_buffer->pointer, &buffer); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* + * Init the param object + */ + params[0] = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER); + if (!params[0]) { + acpi_os_free (buffer.pointer); + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* + * Set up the parameter object + */ + params[0]->buffer.length = (u32) buffer.length; + params[0]->buffer.pointer = buffer.pointer; + params[0]->common.flags = AOPOBJ_DATA_VALID; + params[1] = NULL; + + info.node = handle; + info.parameters = params; + info.parameter_type = ACPI_PARAM_ARGS; + + /* + * Execute the method, no return value + */ + status = acpi_ns_evaluate_relative ("_SRS", &info); + if (ACPI_SUCCESS (status)) { + /* Delete any return object (especially if implicit_return is enabled) */ + + if (info.return_object) { + acpi_ut_remove_reference (info.return_object); + } + } + + /* + * Clean up and return the status from acpi_ns_evaluate_relative + */ + acpi_ut_remove_reference (params[0]); + return_ACPI_STATUS (status); +} + |