diff options
Diffstat (limited to 'drivers/acpi/resources/rsutils.c')
| -rw-r--r-- | drivers/acpi/resources/rsutils.c | 155 |
1 files changed, 87 insertions, 68 deletions
diff --git a/drivers/acpi/resources/rsutils.c b/drivers/acpi/resources/rsutils.c index 25b5aedd6612..a9cbee8e8b44 100644 --- a/drivers/acpi/resources/rsutils.c +++ b/drivers/acpi/resources/rsutils.c @@ -205,6 +205,7 @@ acpi_rs_set_resource_length(acpi_rsdesc_size total_length, /* 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, @@ -298,7 +299,8 @@ static u16 acpi_rs_strcpy(char *destination, char *source) * string_ptr - (optional) where to store the actual * resource_source string * - * RETURN: Length of the string plus NULL terminator, rounded up to 32 bit + * 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 @@ -328,6 +330,7 @@ acpi_rs_get_resource_source(acpi_rs_length resource_length, * 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]; @@ -344,23 +347,26 @@ acpi_rs_get_resource_source(acpi_rs_length resource_length, } /* - * In order for the struct_size to fall on a 32-bit boundary, calculate - * the length of the string (+1 for the NULL terminator) and expand the - * struct_size to the next 32-bit boundary. + * 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 = - ACPI_ROUND_UP_to_32_bITS(ACPI_STRLEN - ((char *)&aml_resource_source[1]) + - 1); + (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, - (char *)&aml_resource_source[1]); + ACPI_CAST_PTR(char, + &aml_resource_source[1])); return ((acpi_rs_length) total_length); } @@ -405,6 +411,7 @@ acpi_rs_set_resource_source(union aml_resource * aml, /* 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); @@ -415,7 +422,7 @@ acpi_rs_set_resource_source(union aml_resource * aml, /* Copy the resource_source string */ - ACPI_STRCPY((char *)&aml_resource_source[1], + ACPI_STRCPY(ACPI_CAST_PTR(char, &aml_resource_source[1]), resource_source->string_ptr); /* @@ -435,9 +442,9 @@ acpi_rs_set_resource_source(union aml_resource * aml, * * 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 * @@ -450,18 +457,19 @@ acpi_rs_set_resource_source(union aml_resource * aml, ******************************************************************************/ 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); @@ -483,9 +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 * @@ -498,18 +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); @@ -522,7 +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); @@ -532,9 +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 * @@ -548,18 +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); @@ -572,7 +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); @@ -583,10 +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 * @@ -605,7 +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 */ @@ -634,9 +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 * @@ -646,23 +656,37 @@ 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 @@ -670,41 +694,36 @@ acpi_rs_set_srs_method_data(acpi_handle handle, struct acpi_buffer *in_buffer) buffer.length = ACPI_ALLOCATE_LOCAL_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 */ + /* Create and initialize the method parameter 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); + 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); } |
