diff options
Diffstat (limited to 'drivers/acpi/resources/rslist.c')
| -rw-r--r-- | drivers/acpi/resources/rslist.c | 92 |
1 files changed, 47 insertions, 45 deletions
diff --git a/drivers/acpi/resources/rslist.c b/drivers/acpi/resources/rslist.c index f72d42e0927..ee17ef3315f 100644 --- a/drivers/acpi/resources/rslist.c +++ b/drivers/acpi/resources/rslist.c @@ -48,7 +48,8 @@ ACPI_MODULE_NAME("rslist") /* Local prototypes */ -static ACPI_GET_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type); +static struct acpi_rsconvert_info *acpi_rs_get_conversion_info(u8 + resource_type); static acpi_status acpi_rs_validate_resource_length(union aml_resource *aml); @@ -83,7 +84,7 @@ static acpi_status acpi_rs_validate_resource_length(union aml_resource *aml) return (AE_AML_INVALID_RESOURCE_TYPE); } - resource_length = acpi_rs_get_resource_length(aml); + resource_length = acpi_ut_get_resource_length(aml); minimum_aml_resource_length = resource_info->minimum_aml_resource_length; @@ -115,18 +116,17 @@ static acpi_status acpi_rs_validate_resource_length(union aml_resource *aml) /******************************************************************************* * - * FUNCTION: acpi_rs_get_resource_handler + * FUNCTION: acpi_rs_get_conversion_info * * PARAMETERS: resource_type - Byte 0 of a resource descriptor * - * RETURN: Pointer to the resource conversion handler + * RETURN: Pointer to the resource conversion info table * - * DESCRIPTION: Extract the Resource Type/Name from the first byte of - * a resource descriptor. + * DESCRIPTION: Get the conversion table associated with this resource type * ******************************************************************************/ -static ACPI_GET_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type) +static struct acpi_rsconvert_info *acpi_rs_get_conversion_info(u8 resource_type) { ACPI_FUNCTION_ENTRY(); @@ -174,33 +174,24 @@ acpi_rs_convert_aml_to_resources(u8 * aml_buffer, acpi_status status; acpi_size bytes_parsed = 0; struct acpi_resource *resource; - u16 resource_length; - u32 descriptor_length; - ACPI_GET_RESOURCE_HANDLER handler; + acpi_rsdesc_size descriptor_length; + struct acpi_rsconvert_info *info; ACPI_FUNCTION_TRACE("rs_convert_aml_to_resources"); /* Loop until end-of-buffer or an end_tag is found */ while (bytes_parsed < aml_buffer_length) { - /* Get the handler associated with this Descriptor Type */ + /* Get the conversion table associated with this Descriptor Type */ - handler = acpi_rs_get_resource_handler(*aml_buffer); - if (!handler) { - /* No handler indicates invalid resource type */ + info = acpi_rs_get_conversion_info(*aml_buffer); + if (!info) { + /* No table indicates an invalid resource type */ return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); } - resource_length = - acpi_rs_get_resource_length(ACPI_CAST_PTR - (union aml_resource, - aml_buffer)); - - descriptor_length = - acpi_rs_get_descriptor_length(ACPI_CAST_PTR - (union aml_resource, - aml_buffer)); + descriptor_length = acpi_ut_get_descriptor_length(aml_buffer); /* * Perform limited validation of the resource length, based upon @@ -214,11 +205,16 @@ acpi_rs_convert_aml_to_resources(u8 * aml_buffer, return_ACPI_STATUS(status); } - /* Convert a byte stream resource to local resource struct */ + /* Convert the AML byte stream resource to a local resource struct */ - status = handler(ACPI_CAST_PTR(union aml_resource, aml_buffer), - resource_length, - ACPI_CAST_PTR(struct acpi_resource, buffer)); + status = + acpi_rs_convert_aml_to_resource(ACPI_CAST_PTR + (struct acpi_resource, + buffer), + ACPI_CAST_PTR(union + aml_resource, + aml_buffer), + info); if (ACPI_FAILURE(status)) { ACPI_REPORT_ERROR(("Could not convert AML resource (type %X) to resource, %s\n", *aml_buffer, acpi_format_exception(status))); return_ACPI_STATUS(status); @@ -232,7 +228,7 @@ acpi_rs_convert_aml_to_resources(u8 * aml_buffer, /* Normal exit on completion of an end_tag resource descriptor */ - if (acpi_rs_get_resource_type(*aml_buffer) == + if (acpi_ut_get_resource_type(aml_buffer) == ACPI_RESOURCE_NAME_END_TAG) { return_ACPI_STATUS(AE_OK); } @@ -276,14 +272,15 @@ acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, acpi_size aml_size_needed, u8 * output_buffer) { u8 *aml_buffer = output_buffer; + u8 *end_aml_buffer = output_buffer + aml_size_needed; acpi_status status; ACPI_FUNCTION_TRACE("rs_convert_resources_to_aml"); - /* Convert each resource descriptor in the list */ + /* Walk the resource descriptor list, convert each descriptor */ - while (1) { - /* Validate Resource Descriptor Type before dispatch */ + while (aml_buffer < end_aml_buffer) { + /* Validate the Resource Type */ if (resource->type > ACPI_RESOURCE_TYPE_MAX) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, @@ -292,14 +289,14 @@ acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, return_ACPI_STATUS(AE_BAD_DATA); } - /* Perform the conversion per resource type */ + /* Perform the conversion */ - status = - acpi_gbl_set_resource_dispatch[resource->type] (resource, - ACPI_CAST_PTR - (union - aml_resource, - aml_buffer)); + status = acpi_rs_convert_resource_to_aml(resource, + ACPI_CAST_PTR(union + aml_resource, + aml_buffer), + acpi_gbl_set_resource_dispatch + [resource->type]); if (ACPI_FAILURE(status)) { ACPI_REPORT_ERROR(("Could not convert resource (type %X) to AML, %s\n", resource->type, acpi_format_exception(status))); return_ACPI_STATUS(status); @@ -323,18 +320,23 @@ acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, return_ACPI_STATUS(AE_OK); } - /* Extract the total length of the new descriptor */ - /* Set the aml_buffer to point to the next (output) resource descriptor */ - - aml_buffer += - acpi_rs_get_descriptor_length(ACPI_CAST_PTR - (union aml_resource, - aml_buffer)); + /* + * Extract the total length of the new descriptor and set the + * aml_buffer to point to the next (output) resource descriptor + */ + aml_buffer += acpi_ut_get_descriptor_length(aml_buffer); /* Point to the next input resource descriptor */ resource = ACPI_PTR_ADD(struct acpi_resource, resource, resource->length); + + /* Check for end-of-list, normal exit */ + } + + /* Completed buffer, but did not find an end_tag resource descriptor */ + + return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); } |