diff options
Diffstat (limited to 'drivers/acpi/resources/rscalc.c')
| -rw-r--r-- | drivers/acpi/resources/rscalc.c | 253 |
1 files changed, 112 insertions, 141 deletions
diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c index c29d3a447278..eca7439ee9da 100644 --- a/drivers/acpi/resources/rscalc.c +++ b/drivers/acpi/resources/rscalc.c @@ -299,13 +299,14 @@ acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed) /* Point to the next object */ - resource = ACPI_PTR_ADD(struct acpi_resource, - resource, resource->length); + resource = + ACPI_PTR_ADD(struct acpi_resource, resource, + resource->length); } - /* Did not find an END_TAG descriptor */ + /* Did not find an end_tag resource descriptor */ - return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); + return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); } /******************************************************************************* @@ -328,185 +329,155 @@ acpi_status acpi_rs_get_list_length(u8 * aml_buffer, u32 aml_buffer_length, acpi_size * size_needed) { + acpi_status status; + u8 *end_aml; u8 *buffer; - struct acpi_resource_info *resource_info; u32 buffer_size = 0; - u32 bytes_parsed = 0; - u8 resource_type; u16 temp16; u16 resource_length; - u16 header_length; u32 extra_struct_bytes; + u8 resource_index; + u8 minimum_aml_resource_length; ACPI_FUNCTION_TRACE("rs_get_list_length"); - while (bytes_parsed < aml_buffer_length) { - /* The next byte in the stream is the resource descriptor type */ + end_aml = aml_buffer + aml_buffer_length; - resource_type = acpi_ut_get_resource_type(aml_buffer); + /* Walk the list of AML resource descriptors */ - /* Get the base stream size and structure sizes for the descriptor */ + while (aml_buffer < end_aml) { + /* Validate the Resource Type and Resource Length */ - resource_info = acpi_rs_get_resource_info(resource_type); - if (!resource_info) { - return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); + status = acpi_ut_validate_resource(aml_buffer, &resource_index); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); } - /* Get the Length field from the input resource descriptor */ + /* Get the resource length and base (minimum) AML size */ resource_length = acpi_ut_get_resource_length(aml_buffer); + minimum_aml_resource_length = + acpi_gbl_resource_aml_sizes[resource_index]; - /* Augment the size for descriptors with optional fields */ - + /* + * Augment the size for descriptors with optional + * and/or variable length fields + */ extra_struct_bytes = 0; + buffer = + aml_buffer + acpi_ut_get_resource_header_length(aml_buffer); - if (!(resource_type & ACPI_RESOURCE_NAME_LARGE)) { + switch (acpi_ut_get_resource_type(aml_buffer)) { + case ACPI_RESOURCE_NAME_IRQ: /* - * Small resource descriptors + * IRQ Resource: + * Get the number of bits set in the 16-bit IRQ mask */ - header_length = - sizeof(struct aml_resource_small_header); - buffer = aml_buffer + header_length; - - switch (resource_type) { - case ACPI_RESOURCE_NAME_IRQ: - /* - * IRQ Resource: - * Get the number of bits set in the IRQ word - */ - ACPI_MOVE_16_TO_16(&temp16, buffer); - extra_struct_bytes = - (acpi_rs_count_set_bits(temp16) * - sizeof(u32)); - break; - - case ACPI_RESOURCE_NAME_DMA: - /* - * DMA Resource: - * Get the number of bits set in the DMA channels byte - */ - ACPI_MOVE_16_TO_16(&temp16, buffer); - extra_struct_bytes = - (acpi_rs_count_set_bits(temp16) * - sizeof(u32)); - break; - - case ACPI_RESOURCE_NAME_VENDOR_SMALL: - /* - * Vendor Specific Resource: - * Ensure a 32-bit boundary for the structure - */ - extra_struct_bytes = - ACPI_ROUND_UP_to_32_bITS(resource_length); - break; + ACPI_MOVE_16_TO_16(&temp16, buffer); + extra_struct_bytes = + acpi_rs_count_set_bits(temp16) * sizeof(u32); + break; - case ACPI_RESOURCE_NAME_END_TAG: - /* - * End Tag: - * Terminate the loop now - */ - aml_buffer_length = bytes_parsed; - break; + case ACPI_RESOURCE_NAME_DMA: + /* + * DMA Resource: + * Get the number of bits set in the 8-bit DMA mask + */ + extra_struct_bytes = + acpi_rs_count_set_bits(*buffer) * sizeof(u32); + break; - default: - break; - } - } else { + case ACPI_RESOURCE_NAME_VENDOR_SMALL: /* - * Large resource descriptors + * Vendor Resource: + * Ensure a 32-bit boundary for the structure */ - header_length = - sizeof(struct aml_resource_large_header); - buffer = aml_buffer + header_length; + extra_struct_bytes = + ACPI_ROUND_UP_to_32_bITS(resource_length) - + resource_length; + break; - switch (resource_type) { - case ACPI_RESOURCE_NAME_VENDOR_LARGE: - /* - * Vendor Defined Resource: - * Add vendor data and ensure a 32-bit boundary for the structure - */ - extra_struct_bytes = - ACPI_ROUND_UP_to_32_bITS(resource_length); - break; + case ACPI_RESOURCE_NAME_END_TAG: + /* + * End Tag: This is the normal exit + */ + *size_needed = buffer_size; + return_ACPI_STATUS(AE_OK); - case ACPI_RESOURCE_NAME_ADDRESS32: - case ACPI_RESOURCE_NAME_ADDRESS16: - /* - * 32-Bit or 16-bit Address Resource: - * Add the size of any optional data (resource_source) - */ - extra_struct_bytes = - acpi_rs_stream_option_length - (resource_length, - resource_info-> - minimum_aml_resource_length); - break; - - case ACPI_RESOURCE_NAME_EXTENDED_IRQ: - /* - * Extended IRQ: - * Point past the interrupt_vector_flags to get the - * interrupt_table_length. - */ - buffer++; + case ACPI_RESOURCE_NAME_VENDOR_LARGE: + /* + * Vendor Resource: + * Add vendor data and ensure a 32-bit boundary for the structure + */ + extra_struct_bytes = + ACPI_ROUND_UP_to_32_bITS(resource_length) - + resource_length; + break; - /* - * Add 4 bytes for each additional interrupt. Note: at least one - * interrupt is required and is included in the minimum - * descriptor size - */ - extra_struct_bytes = - ((*buffer - 1) * sizeof(u32)); + case ACPI_RESOURCE_NAME_ADDRESS32: + case ACPI_RESOURCE_NAME_ADDRESS16: + /* + * 32-Bit or 16-bit Address Resource: + * Add the size of any optional data (resource_source) + */ + extra_struct_bytes = + acpi_rs_stream_option_length(resource_length, + minimum_aml_resource_length); + break; - /* Add the size of any optional data (resource_source) */ + case ACPI_RESOURCE_NAME_EXTENDED_IRQ: + /* + * Extended IRQ: + * Point past the interrupt_vector_flags to get the + * interrupt_table_length. + */ + buffer++; + + extra_struct_bytes = + /* + * Add 4 bytes for each additional interrupt. Note: at + * least one interrupt is required and is included in + * the minimum descriptor size + */ + ((*buffer - 1) * sizeof(u32)) + + /* Add the size of any optional data (resource_source) */ + acpi_rs_stream_option_length(resource_length - + extra_struct_bytes, + minimum_aml_resource_length); + break; - extra_struct_bytes += - acpi_rs_stream_option_length(resource_length - - - extra_struct_bytes, - resource_info-> - minimum_aml_resource_length); - break; + case ACPI_RESOURCE_NAME_ADDRESS64: + /* + * 64-Bit Address Resource: + * Add the size of any optional data (resource_source) + * Ensure a 64-bit boundary for the structure + */ + extra_struct_bytes = + ACPI_ROUND_UP_to_64_bITS + (acpi_rs_stream_option_length + (resource_length, minimum_aml_resource_length)); + break; - case ACPI_RESOURCE_NAME_ADDRESS64: - /* - * 64-Bit Address Resource: - * Add the size of any optional data (resource_source) - * Ensure a 64-bit boundary for the structure - */ - extra_struct_bytes = - ACPI_ROUND_UP_to_64_bITS - (acpi_rs_stream_option_length - (resource_length, - resource_info-> - minimum_aml_resource_length)); - break; - - default: - break; - } + default: + break; } /* Update the required buffer size for the internal descriptor structs */ - temp16 = - (u16) (resource_info->minimum_internal_struct_length + - extra_struct_bytes); + temp16 = (u16) (acpi_gbl_resource_struct_sizes[resource_index] + + extra_struct_bytes); buffer_size += (u32) ACPI_ALIGN_RESOURCE_SIZE(temp16); /* - * Update byte count and point to the next resource within the stream + * Point to the next resource within the stream * using the size of the header plus the length contained in the header */ - temp16 = (u16) (header_length + resource_length); - bytes_parsed += temp16; - aml_buffer += temp16; + aml_buffer += acpi_ut_get_descriptor_length(aml_buffer); } - /* This is the data the caller needs */ + /* Did not find an end_tag resource descriptor */ - *size_needed = buffer_size; - return_ACPI_STATUS(AE_OK); + return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); } /******************************************************************************* |