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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [acpi/] [resources/] [rsxface.c] - Rev 1765
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/******************************************************************************* * * Module Name: rsxface - Public interfaces to the resource manager * ******************************************************************************/ /* * Copyright (C) 2000 - 2004, 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> #define _COMPONENT ACPI_RESOURCES ACPI_MODULE_NAME ("rsxface") /******************************************************************************* * * 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); } /******************************************************************************* * * 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. * ******************************************************************************/ 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); } /******************************************************************************* * * 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 = (struct acpi_resource *) ((u8 *) buffer.pointer + buffer.length); /* Walk the resource list */ for (;;) { if (!resource || resource->id == 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); } /******************************************************************************* * * 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); } #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_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->id) { 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); }