X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Facpi%2Fresources%2Frsutils.c;h=a9cbee8e8b44c3a12145c6be17ed36657e9ba1a5;hb=69cd291c6bbc6647fe3783257c5a2e076e808f71;hp=4446778eaf7927df16f9b29a49fb2a6395871086;hpb=d67eb16f5d444fb6d173bcec889ddb2066c0fa0c;p=pandora-kernel.git diff --git a/drivers/acpi/resources/rsutils.c b/drivers/acpi/resources/rsutils.c index 4446778eaf79..a9cbee8e8b44 100644 --- a/drivers/acpi/resources/rsutils.c +++ b/drivers/acpi/resources/rsutils.c @@ -5,7 +5,7 @@ ******************************************************************************/ /* - * Copyright (C) 2000 - 2005, R. Byron Moore + * Copyright (C) 2000 - 2006, R. Byron Moore * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -48,13 +48,403 @@ #define _COMPONENT ACPI_RESOURCES ACPI_MODULE_NAME("rsutils") +/******************************************************************************* + * + * FUNCTION: acpi_rs_decode_bitmask + * + * PARAMETERS: Mask - Bitmask to decode + * List - Where the converted list is returned + * + * RETURN: Count of bits set (length of list) + * + * DESCRIPTION: Convert a bit mask into a list of values + * + ******************************************************************************/ +u8 acpi_rs_decode_bitmask(u16 mask, u8 * list) +{ + acpi_native_uint i; + u8 bit_count; + + ACPI_FUNCTION_ENTRY(); + + /* Decode the mask bits */ + + for (i = 0, bit_count = 0; mask; i++) { + if (mask & 0x0001) { + list[bit_count] = (u8) i; + bit_count++; + } + + mask >>= 1; + } + + return (bit_count); +} + +/******************************************************************************* + * + * FUNCTION: acpi_rs_encode_bitmask + * + * PARAMETERS: List - List of values to encode + * Count - Length of list + * + * RETURN: Encoded bitmask + * + * DESCRIPTION: Convert a list of values to an encoded bitmask + * + ******************************************************************************/ + +u16 acpi_rs_encode_bitmask(u8 * list, u8 count) +{ + acpi_native_uint i; + u16 mask; + + ACPI_FUNCTION_ENTRY(); + + /* Encode the list into a single bitmask */ + + for (i = 0, mask = 0; i < count; i++) { + mask |= (0x0001 << list[i]); + } + + return (mask); +} + +/******************************************************************************* + * + * FUNCTION: acpi_rs_move_data + * + * PARAMETERS: Destination - Pointer to the destination descriptor + * Source - Pointer to the source descriptor + * item_count - How many items to move + * move_type - Byte width + * + * RETURN: None + * + * DESCRIPTION: Move multiple data items from one descriptor to another. Handles + * alignment issues and endian issues if necessary, as configured + * via the ACPI_MOVE_* macros. (This is why a memcpy is not used) + * + ******************************************************************************/ + +void +acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type) +{ + acpi_native_uint i; + + ACPI_FUNCTION_ENTRY(); + + /* One move per item */ + + for (i = 0; i < item_count; i++) { + switch (move_type) { + /* + * For the 8-bit case, we can perform the move all at once + * since there are no alignment or endian issues + */ + case ACPI_RSC_MOVE8: + ACPI_MEMCPY(destination, source, item_count); + return; + + /* + * 16-, 32-, and 64-bit cases must use the move macros that perform + * endian conversion and/or accomodate hardware that cannot perform + * misaligned memory transfers + */ + case ACPI_RSC_MOVE16: + ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i], + &ACPI_CAST_PTR(u16, source)[i]); + break; + + case ACPI_RSC_MOVE32: + ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i], + &ACPI_CAST_PTR(u32, source)[i]); + break; + + case ACPI_RSC_MOVE64: + ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i], + &ACPI_CAST_PTR(u64, source)[i]); + break; + + default: + return; + } + } +} + +/******************************************************************************* + * + * FUNCTION: acpi_rs_set_resource_length + * + * PARAMETERS: total_length - Length of the AML descriptor, including + * the header and length fields. + * Aml - Pointer to the raw AML descriptor + * + * RETURN: None + * + * DESCRIPTION: Set the resource_length field of an AML + * resource descriptor, both Large and Small descriptors are + * supported automatically. Note: Descriptor Type field must + * be valid. + * + ******************************************************************************/ + +void +acpi_rs_set_resource_length(acpi_rsdesc_size total_length, + union aml_resource *aml) +{ + acpi_rs_length resource_length; + + ACPI_FUNCTION_ENTRY(); + + /* Length is the total descriptor length minus the header length */ + + resource_length = (acpi_rs_length) + (total_length - acpi_ut_get_resource_header_length(aml)); + + /* Length is stored differently for large and small descriptors */ + + if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) { + + /* Large descriptor -- bytes 1-2 contain the 16-bit length */ + + ACPI_MOVE_16_TO_16(&aml->large_header.resource_length, + &resource_length); + } else { + /* Small descriptor -- bits 2:0 of byte 0 contain the length */ + + aml->small_header.descriptor_type = (u8) + + /* Clear any existing length, preserving descriptor type bits */ + ((aml->small_header. + descriptor_type & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK) + + | resource_length); + } +} + +/******************************************************************************* + * + * FUNCTION: acpi_rs_set_resource_header + * + * PARAMETERS: descriptor_type - Byte to be inserted as the type + * total_length - Length of the AML descriptor, including + * the header and length fields. + * Aml - Pointer to the raw AML descriptor + * + * RETURN: None + * + * DESCRIPTION: Set the descriptor_type and resource_length fields of an AML + * resource descriptor, both Large and Small descriptors are + * supported automatically + * + ******************************************************************************/ + +void +acpi_rs_set_resource_header(u8 descriptor_type, + acpi_rsdesc_size total_length, + union aml_resource *aml) +{ + ACPI_FUNCTION_ENTRY(); + + /* Set the Resource Type */ + + aml->small_header.descriptor_type = descriptor_type; + + /* Set the Resource Length */ + + acpi_rs_set_resource_length(total_length, aml); +} + +/******************************************************************************* + * + * FUNCTION: acpi_rs_strcpy + * + * PARAMETERS: Destination - Pointer to the destination string + * Source - Pointer to the source string + * + * RETURN: String length, including NULL terminator + * + * DESCRIPTION: Local string copy that returns the string length, saving a + * strcpy followed by a strlen. + * + ******************************************************************************/ + +static u16 acpi_rs_strcpy(char *destination, char *source) +{ + u16 i; + + ACPI_FUNCTION_ENTRY(); + + for (i = 0; source[i]; i++) { + destination[i] = source[i]; + } + + destination[i] = 0; + + /* Return string length including the NULL terminator */ + + return ((u16) (i + 1)); +} + +/******************************************************************************* + * + * FUNCTION: acpi_rs_get_resource_source + * + * PARAMETERS: resource_length - Length field of the descriptor + * minimum_length - Minimum length of the descriptor (minus + * any optional fields) + * resource_source - Where the resource_source is returned + * Aml - Pointer to the raw AML descriptor + * string_ptr - (optional) where to store the actual + * resource_source string + * + * RETURN: Length of the string plus NULL terminator, rounded up to native + * word boundary + * + * DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor + * to an internal resource descriptor + * + ******************************************************************************/ + +acpi_rs_length +acpi_rs_get_resource_source(acpi_rs_length resource_length, + acpi_rs_length minimum_length, + struct acpi_resource_source * resource_source, + union aml_resource * aml, char *string_ptr) +{ + acpi_rsdesc_size total_length; + u8 *aml_resource_source; + + ACPI_FUNCTION_ENTRY(); + + total_length = + resource_length + sizeof(struct aml_resource_large_header); + aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length); + + /* + * resource_source is present if the length of the descriptor is longer than + * the minimum length. + * + * Note: Some resource descriptors will have an additional null, so + * we add 1 to the minimum length. + */ + if (total_length > (acpi_rsdesc_size) (minimum_length + 1)) { + + /* Get the resource_source_index */ + + resource_source->index = aml_resource_source[0]; + + resource_source->string_ptr = string_ptr; + if (!string_ptr) { + /* + * String destination pointer is not specified; Set the String + * pointer to the end of the current resource_source structure. + */ + resource_source->string_ptr = + ACPI_ADD_PTR(char, resource_source, + sizeof(struct acpi_resource_source)); + } + + /* + * In order for the Resource length to be a multiple of the native + * word, calculate the length of the string (+1 for NULL terminator) + * and expand to the next word multiple. + * + * Zero the entire area of the buffer. + */ + total_length = + (u32) + ACPI_STRLEN(ACPI_CAST_PTR(char, &aml_resource_source[1])) + + 1; + total_length = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(total_length); + + ACPI_MEMSET(resource_source->string_ptr, 0, total_length); + + /* Copy the resource_source string to the destination */ + + resource_source->string_length = + acpi_rs_strcpy(resource_source->string_ptr, + ACPI_CAST_PTR(char, + &aml_resource_source[1])); + + return ((acpi_rs_length) total_length); + } + + /* resource_source is not present */ + + resource_source->index = 0; + resource_source->string_length = 0; + resource_source->string_ptr = NULL; + return (0); +} + +/******************************************************************************* + * + * FUNCTION: acpi_rs_set_resource_source + * + * PARAMETERS: Aml - Pointer to the raw AML descriptor + * minimum_length - Minimum length of the descriptor (minus + * any optional fields) + * resource_source - Internal resource_source + + * + * RETURN: Total length of the AML descriptor + * + * DESCRIPTION: Convert an optional resource_source from internal format to a + * raw AML resource descriptor + * + ******************************************************************************/ + +acpi_rsdesc_size +acpi_rs_set_resource_source(union aml_resource * aml, + acpi_rs_length minimum_length, + struct acpi_resource_source * resource_source) +{ + u8 *aml_resource_source; + acpi_rsdesc_size descriptor_length; + + ACPI_FUNCTION_ENTRY(); + + descriptor_length = minimum_length; + + /* Non-zero string length indicates presence of a resource_source */ + + if (resource_source->string_length) { + + /* Point to the end of the AML descriptor */ + + aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length); + + /* Copy the resource_source_index */ + + aml_resource_source[0] = (u8) resource_source->index; + + /* Copy the resource_source string */ + + ACPI_STRCPY(ACPI_CAST_PTR(char, &aml_resource_source[1]), + resource_source->string_ptr); + + /* + * Add the length of the string (+ 1 for null terminator) to the + * final descriptor length + */ + descriptor_length += + ((acpi_rsdesc_size) resource_source->string_length + 1); + } + + /* Return the new total length of the AML descriptor */ + + return (descriptor_length); +} + /******************************************************************************* * * 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 + * PARAMETERS: Node - Device node + * ret_buffer - Pointer to a buffer structure for the + * results * * RETURN: Status * @@ -65,19 +455,21 @@ ACPI_MODULE_NAME("rsutils") * 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) +acpi_rs_get_prt_method_data(struct acpi_namespace_node * node, + struct acpi_buffer * ret_buffer) { union acpi_operand_object *obj_desc; acpi_status status; - ACPI_FUNCTION_TRACE("rs_get_prt_method_data"); + ACPI_FUNCTION_TRACE(rs_get_prt_method_data); /* Parameters guaranteed valid by caller */ /* Execute the method, no parameters */ - status = acpi_ut_evaluate_object(handle, METHOD_NAME__PRT, + status = acpi_ut_evaluate_object(node, METHOD_NAME__PRT, ACPI_BTYPE_PACKAGE, &obj_desc); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); @@ -99,9 +491,9 @@ acpi_rs_get_prt_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) * * 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 + * PARAMETERS: Node - Device node + * ret_buffer - Pointer to a buffer structure for the + * results * * RETURN: Status * @@ -114,18 +506,19 @@ acpi_rs_get_prt_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) ******************************************************************************/ acpi_status -acpi_rs_get_crs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) +acpi_rs_get_crs_method_data(struct acpi_namespace_node *node, + struct acpi_buffer *ret_buffer) { union acpi_operand_object *obj_desc; acpi_status status; - ACPI_FUNCTION_TRACE("rs_get_crs_method_data"); + ACPI_FUNCTION_TRACE(rs_get_crs_method_data); /* Parameters guaranteed valid by caller */ /* Execute the method, no parameters */ - status = acpi_ut_evaluate_object(handle, METHOD_NAME__CRS, + status = acpi_ut_evaluate_object(node, METHOD_NAME__CRS, ACPI_BTYPE_BUFFER, &obj_desc); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); @@ -138,7 +531,7 @@ acpi_rs_get_crs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) */ status = acpi_rs_create_resource_list(obj_desc, ret_buffer); - /* on exit, we must delete the object returned by evaluate_object */ + /* On exit, we must delete the object returned by evaluate_object */ acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status); @@ -148,9 +541,9 @@ acpi_rs_get_crs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) * * 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 + * PARAMETERS: Node - Device node + * ret_buffer - Pointer to a buffer structure for the + * results * * RETURN: Status * @@ -164,18 +557,19 @@ acpi_rs_get_crs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) #ifdef ACPI_FUTURE_USAGE acpi_status -acpi_rs_get_prs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) +acpi_rs_get_prs_method_data(struct acpi_namespace_node *node, + struct acpi_buffer *ret_buffer) { union acpi_operand_object *obj_desc; acpi_status status; - ACPI_FUNCTION_TRACE("rs_get_prs_method_data"); + ACPI_FUNCTION_TRACE(rs_get_prs_method_data); /* Parameters guaranteed valid by caller */ /* Execute the method, no parameters */ - status = acpi_ut_evaluate_object(handle, METHOD_NAME__PRS, + status = acpi_ut_evaluate_object(node, METHOD_NAME__PRS, ACPI_BTYPE_BUFFER, &obj_desc); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); @@ -188,7 +582,7 @@ acpi_rs_get_prs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) */ status = acpi_rs_create_resource_list(obj_desc, ret_buffer); - /* on exit, we must delete the object returned by evaluate_object */ + /* On exit, we must delete the object returned by evaluate_object */ acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status); @@ -199,10 +593,10 @@ acpi_rs_get_prs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) * * FUNCTION: acpi_rs_get_method_data * - * PARAMETERS: Handle - a handle to the containing object + * PARAMETERS: Handle - Handle to the containing object * Path - Path to method, relative to Handle - * ret_buffer - a pointer to a buffer structure for the - * results + * ret_buffer - Pointer to a buffer structure for the + * results * * RETURN: Status * @@ -221,7 +615,7 @@ acpi_rs_get_method_data(acpi_handle handle, union acpi_operand_object *obj_desc; acpi_status status; - ACPI_FUNCTION_TRACE("rs_get_method_data"); + ACPI_FUNCTION_TRACE(rs_get_method_data); /* Parameters guaranteed valid by caller */ @@ -250,9 +644,9 @@ acpi_rs_get_method_data(acpi_handle handle, * * 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 + * PARAMETERS: Node - Device node + * in_buffer - Pointer to a buffer structure of the + * parameter * * RETURN: Status * @@ -262,65 +656,74 @@ acpi_rs_get_method_data(acpi_handle handle, * If the function fails an appropriate status will be returned * and the contents of the callers buffer is undefined. * + * Note: Parameters guaranteed valid by caller + * ******************************************************************************/ acpi_status -acpi_rs_set_srs_method_data(acpi_handle handle, struct acpi_buffer *in_buffer) +acpi_rs_set_srs_method_data(struct acpi_namespace_node *node, + struct acpi_buffer *in_buffer) { - struct acpi_parameter_info info; - union acpi_operand_object *params[2]; + struct acpi_evaluate_info *info; + union acpi_operand_object *args[2]; acpi_status status; struct acpi_buffer buffer; - ACPI_FUNCTION_TRACE("rs_set_srs_method_data"); + ACPI_FUNCTION_TRACE(rs_set_srs_method_data); - /* Parameters guaranteed valid by caller */ + /* Allocate and initialize the evaluation information block */ + + info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); + if (!info) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + info->prefix_node = node; + info->pathname = METHOD_NAME__SRS; + info->parameters = args; + info->parameter_type = ACPI_PARAM_ARGS; + info->flags = ACPI_IGNORE_RETURN_VALUE; /* * The in_buffer parameter will point to a linked list of - * resource parameters. It needs to be formatted into a + * 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); + status = acpi_rs_create_aml_resources(in_buffer->pointer, &buffer); if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); + goto cleanup; } - /* 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); + /* Create and initialize the method parameter object */ + + args[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); + if (!args[0]) { + /* + * Must free the buffer allocated above (otherwise it is freed + * later) + */ + ACPI_FREE(buffer.pointer); + status = AE_NO_MEMORY; + goto cleanup; } - /* 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; + args[0]->buffer.length = (u32) buffer.length; + args[0]->buffer.pointer = buffer.pointer; + args[0]->common.flags = AOPOBJ_DATA_VALID; + args[1] = NULL; - /* Execute the method, no return value */ + /* Execute the method, no return value is expected */ - status = acpi_ns_evaluate_relative(METHOD_NAME__SRS, &info); - if (ACPI_SUCCESS(status)) { - /* Delete any return object (especially if implicit_return is enabled) */ + status = acpi_ns_evaluate(info); - if (info.return_object) { - acpi_ut_remove_reference(info.return_object); - } - } + /* Clean up and return the status from acpi_ns_evaluate */ - /* Clean up and return the status from acpi_ns_evaluate_relative */ + acpi_ut_remove_reference(args[0]); - acpi_ut_remove_reference(params[0]); + cleanup: + ACPI_FREE(info); return_ACPI_STATUS(status); }