diff options
Diffstat (limited to 'drivers/acpi/resources/rslist.c')
| -rw-r--r-- | drivers/acpi/resources/rslist.c | 533 |
1 files changed, 173 insertions, 360 deletions
diff --git a/drivers/acpi/resources/rslist.c b/drivers/acpi/resources/rslist.c index 103eb31c284e..87e75349dd0a 100644 --- a/drivers/acpi/resources/rslist.c +++ b/drivers/acpi/resources/rslist.c @@ -47,44 +47,143 @@ #define _COMPONENT ACPI_RESOURCES ACPI_MODULE_NAME("rslist") +/* Dispatch table for convert-to-stream functions */ +typedef +acpi_status(*ACPI_STREAM_HANDLER) (struct acpi_resource * resource, + u8 ** output_buffer, + acpi_size * bytes_consumed); + +static ACPI_STREAM_HANDLER acpi_gbl_stream_dispatch[] = { + acpi_rs_irq_stream, /* ACPI_RSTYPE_IRQ */ + acpi_rs_dma_stream, /* ACPI_RSTYPE_DMA */ + acpi_rs_start_depend_fns_stream, /* ACPI_RSTYPE_START_DPF */ + acpi_rs_end_depend_fns_stream, /* ACPI_RSTYPE_END_DPF */ + acpi_rs_io_stream, /* ACPI_RSTYPE_IO */ + acpi_rs_fixed_io_stream, /* ACPI_RSTYPE_FIXED_IO */ + acpi_rs_vendor_stream, /* ACPI_RSTYPE_VENDOR */ + acpi_rs_end_tag_stream, /* ACPI_RSTYPE_END_TAG */ + acpi_rs_memory24_stream, /* ACPI_RSTYPE_MEM24 */ + acpi_rs_memory32_range_stream, /* ACPI_RSTYPE_MEM32 */ + acpi_rs_fixed_memory32_stream, /* ACPI_RSTYPE_FIXED_MEM32 */ + acpi_rs_address16_stream, /* ACPI_RSTYPE_ADDRESS16 */ + acpi_rs_address32_stream, /* ACPI_RSTYPE_ADDRESS32 */ + acpi_rs_address64_stream, /* ACPI_RSTYPE_ADDRESS64 */ + acpi_rs_extended_irq_stream, /* ACPI_RSTYPE_EXT_IRQ */ + acpi_rs_generic_register_stream /* ACPI_RSTYPE_GENERIC_REG */ +}; + +/* Dispatch tables for convert-to-resource functions */ + +typedef +acpi_status(*ACPI_RESOURCE_HANDLER) (u8 * byte_stream_buffer, + acpi_size * bytes_consumed, + u8 ** output_buffer, + acpi_size * structure_size); + +static ACPI_RESOURCE_HANDLER acpi_gbl_sm_resource_dispatch[] = { + NULL, /* 0x00, Reserved */ + NULL, /* 0x01, Reserved */ + NULL, /* 0x02, Reserved */ + NULL, /* 0x03, Reserved */ + acpi_rs_irq_resource, /* ACPI_RDESC_TYPE_IRQ_FORMAT */ + acpi_rs_dma_resource, /* ACPI_RDESC_TYPE_DMA_FORMAT */ + acpi_rs_start_depend_fns_resource, /* ACPI_RDESC_TYPE_START_DEPENDENT */ + acpi_rs_end_depend_fns_resource, /* ACPI_RDESC_TYPE_END_DEPENDENT */ + acpi_rs_io_resource, /* ACPI_RDESC_TYPE_IO_PORT */ + acpi_rs_fixed_io_resource, /* ACPI_RDESC_TYPE_FIXED_IO_PORT */ + NULL, /* 0x0A, Reserved */ + NULL, /* 0x0B, Reserved */ + NULL, /* 0x0C, Reserved */ + NULL, /* 0x0D, Reserved */ + acpi_rs_vendor_resource, /* ACPI_RDESC_TYPE_SMALL_VENDOR */ + acpi_rs_end_tag_resource /* ACPI_RDESC_TYPE_END_TAG */ +}; + +static ACPI_RESOURCE_HANDLER acpi_gbl_lg_resource_dispatch[] = { + NULL, /* 0x00, Reserved */ + acpi_rs_memory24_resource, /* ACPI_RDESC_TYPE_MEMORY_24 */ + acpi_rs_generic_register_resource, /* ACPI_RDESC_TYPE_GENERIC_REGISTER */ + NULL, /* 0x03, Reserved */ + acpi_rs_vendor_resource, /* ACPI_RDESC_TYPE_LARGE_VENDOR */ + acpi_rs_memory32_range_resource, /* ACPI_RDESC_TYPE_MEMORY_32 */ + acpi_rs_fixed_memory32_resource, /* ACPI_RDESC_TYPE_FIXED_MEMORY_32 */ + acpi_rs_address32_resource, /* ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE */ + acpi_rs_address16_resource, /* ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE */ + acpi_rs_extended_irq_resource, /* ACPI_RDESC_TYPE_EXTENDED_XRUPT */ + acpi_rs_address64_resource, /* ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE */ + acpi_rs_address64_resource /* ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE */ +}; + +/* Local prototypes */ + +static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type); + /******************************************************************************* * * FUNCTION: acpi_rs_get_resource_type * - * PARAMETERS: resource_start_byte - Byte 0 of a resource descriptor + * PARAMETERS: resource_type - Byte 0 of a resource descriptor * - * RETURN: The Resource Type with no extraneous bits + * RETURN: The Resource Type with no extraneous bits (except the large/ + * small bit -- left alone) * * DESCRIPTION: Extract the Resource Type/Name from the first byte of * a resource descriptor. * ******************************************************************************/ -u8 acpi_rs_get_resource_type(u8 resource_start_byte) -{ +u8 acpi_rs_get_resource_type(u8 resource_type) +{ ACPI_FUNCTION_ENTRY(); /* Determine if this is a small or large resource */ - switch (resource_start_byte & ACPI_RDESC_TYPE_MASK) { - case ACPI_RDESC_TYPE_SMALL: + if (resource_type & ACPI_RDESC_TYPE_LARGE) { + /* Large Resource Type -- bits 6:0 contain the name */ + + return (resource_type); + } else { + /* Small Resource Type -- bits 6:3 contain the name */ + + return ((u8) (resource_type & ACPI_RDESC_SMALL_MASK)); + } +} + +/******************************************************************************* + * + * FUNCTION: acpi_rs_get_resource_handler + * + * PARAMETERS: resource_type - Byte 0 of a resource descriptor + * + * RETURN: Pointer to the resource conversion handler + * + * DESCRIPTION: Extract the Resource Type/Name from the first byte of + * a resource descriptor. + * + ******************************************************************************/ - /* Small Resource Type -- Only bits 6:3 are valid */ +static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type) +{ + ACPI_FUNCTION_ENTRY(); - return ((u8) (resource_start_byte & ACPI_RDESC_SMALL_MASK)); + /* Determine if this is a small or large resource */ - case ACPI_RDESC_TYPE_LARGE: + if (resource_type & ACPI_RDESC_TYPE_LARGE) { + /* Large Resource Type -- bits 6:0 contain the name */ - /* Large Resource Type -- All bits are valid */ + if (resource_type > ACPI_RDESC_LARGE_MAX) { + return (NULL); + } - return (resource_start_byte); + return (acpi_gbl_lg_resource_dispatch[(resource_type & + ACPI_RDESC_LARGE_MASK)]); + } else { + /* Small Resource Type -- bits 6:3 contain the name */ - default: - /* Invalid type */ - break; + return (acpi_gbl_sm_resource_dispatch[((resource_type & + ACPI_RDESC_SMALL_MASK) + >> 3)]); } - - return (0xFF); } /******************************************************************************* @@ -107,228 +206,70 @@ acpi_status acpi_rs_byte_stream_to_list(u8 * byte_stream_buffer, u32 byte_stream_buffer_length, u8 * output_buffer) { + u8 *buffer = output_buffer; acpi_status status; acpi_size bytes_parsed = 0; - u8 resource_type = 0; acpi_size bytes_consumed = 0; - u8 *buffer = output_buffer; acpi_size structure_size = 0; - u8 end_tag_processed = FALSE; struct acpi_resource *resource; + ACPI_RESOURCE_HANDLER handler; ACPI_FUNCTION_TRACE("rs_byte_stream_to_list"); - while (bytes_parsed < byte_stream_buffer_length && !end_tag_processed) { - /* The next byte in the stream is the resource type */ - - resource_type = acpi_rs_get_resource_type(*byte_stream_buffer); - - switch (resource_type) { - case ACPI_RDESC_TYPE_MEMORY_24: - /* - * 24-Bit Memory Resource - */ - status = acpi_rs_memory24_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_LARGE_VENDOR: - /* - * Vendor Defined Resource - */ - status = acpi_rs_vendor_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_MEMORY_32: - /* - * 32-Bit Memory Range Resource - */ - status = - acpi_rs_memory32_range_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_FIXED_MEMORY_32: - /* - * 32-Bit Fixed Memory Resource - */ - status = - acpi_rs_fixed_memory32_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE: - case ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE: - /* - * 64-Bit Address Resource - */ - status = acpi_rs_address64_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE: - /* - * 32-Bit Address Resource - */ - status = acpi_rs_address32_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE: - /* - * 16-Bit Address Resource - */ - status = acpi_rs_address16_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_EXTENDED_XRUPT: - /* - * Extended IRQ - */ - status = - acpi_rs_extended_irq_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_IRQ_FORMAT: - /* - * IRQ Resource - */ - status = acpi_rs_irq_resource(byte_stream_buffer, - &bytes_consumed, &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_DMA_FORMAT: - /* - * DMA Resource - */ - status = acpi_rs_dma_resource(byte_stream_buffer, - &bytes_consumed, &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_START_DEPENDENT: - /* - * Start Dependent Functions Resource - */ - status = - acpi_rs_start_depend_fns_resource - (byte_stream_buffer, &bytes_consumed, &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_END_DEPENDENT: - /* - * End Dependent Functions Resource - */ - status = - acpi_rs_end_depend_fns_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_IO_PORT: - /* - * IO Port Resource - */ - status = acpi_rs_io_resource(byte_stream_buffer, - &bytes_consumed, &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_FIXED_IO_PORT: - /* - * Fixed IO Port Resource - */ - status = acpi_rs_fixed_io_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_SMALL_VENDOR: - /* - * Vendor Specific Resource - */ - status = acpi_rs_vendor_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - case ACPI_RDESC_TYPE_END_TAG: - /* - * End Tag - */ - end_tag_processed = TRUE; - status = acpi_rs_end_tag_resource(byte_stream_buffer, - &bytes_consumed, - &buffer, - &structure_size); - break; - - default: - /* - * Invalid/Unknown resource type - */ + /* Loop until end-of-buffer or an end_tag is found */ + + while (bytes_parsed < byte_stream_buffer_length) { + /* Get the handler associated with this Descriptor Type */ + + handler = acpi_rs_get_resource_handler(*byte_stream_buffer); + if (handler) { + /* Convert a byte stream resource to local resource struct */ + + status = handler(byte_stream_buffer, &bytes_consumed, + &buffer, &structure_size); + } else { + /* Invalid resource type */ + status = AE_AML_INVALID_RESOURCE_TYPE; - break; } if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } - /* Update the return value and counter */ + /* Set the aligned length of the new resource descriptor */ - bytes_parsed += bytes_consumed; + resource = ACPI_CAST_PTR(struct acpi_resource, buffer); + resource->length = + (u32) ACPI_ALIGN_RESOURCE_SIZE(resource->length); - /* Set the byte stream to point to the next resource */ + /* Normal exit on completion of an end_tag resource descriptor */ + if (acpi_rs_get_resource_type(*byte_stream_buffer) == + ACPI_RDESC_TYPE_END_TAG) { + return_ACPI_STATUS(AE_OK); + } + + /* Update counter and point to the next input resource */ + + bytes_parsed += bytes_consumed; byte_stream_buffer += bytes_consumed; - /* Set the Buffer to the next structure */ + /* Point to the next structure in the output buffer */ - resource = ACPI_CAST_PTR(struct acpi_resource, buffer); - resource->length = - (u32) ACPI_ALIGN_RESOURCE_SIZE(resource->length); buffer += ACPI_ALIGN_RESOURCE_SIZE(structure_size); } - /* Check the reason for exiting the while loop */ + /* Completed buffer, but did not find an end_tag resource descriptor */ - if (!end_tag_processed) { - return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); - } - - return_ACPI_STATUS(AE_OK); + return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); } /******************************************************************************* * * FUNCTION: acpi_rs_list_to_byte_stream * - * PARAMETERS: linked_list - Pointer to the resource linked list + * PARAMETERS: Resource - Pointer to the resource linked list * byte_steam_size_needed - Calculated size of the byte stream * needed from calling * acpi_rs_get_byte_stream_length() @@ -346,180 +287,52 @@ acpi_rs_byte_stream_to_list(u8 * byte_stream_buffer, ******************************************************************************/ acpi_status -acpi_rs_list_to_byte_stream(struct acpi_resource *linked_list, +acpi_rs_list_to_byte_stream(struct acpi_resource *resource, acpi_size byte_stream_size_needed, u8 * output_buffer) { - acpi_status status; u8 *buffer = output_buffer; acpi_size bytes_consumed = 0; - u8 done = FALSE; + acpi_status status; ACPI_FUNCTION_TRACE("rs_list_to_byte_stream"); - while (!done) { - switch (linked_list->id) { - case ACPI_RSTYPE_IRQ: - /* - * IRQ Resource - */ - status = - acpi_rs_irq_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_DMA: - /* - * DMA Resource - */ - status = - acpi_rs_dma_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_START_DPF: - /* - * Start Dependent Functions Resource - */ - status = acpi_rs_start_depend_fns_stream(linked_list, - &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_END_DPF: - /* - * End Dependent Functions Resource - */ - status = acpi_rs_end_depend_fns_stream(linked_list, - &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_IO: - /* - * IO Port Resource - */ - status = - acpi_rs_io_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_FIXED_IO: - /* - * Fixed IO Port Resource - */ - status = - acpi_rs_fixed_io_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_VENDOR: - /* - * Vendor Defined Resource - */ - status = - acpi_rs_vendor_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_END_TAG: - /* - * End Tag - */ - status = - acpi_rs_end_tag_stream(linked_list, &buffer, - &bytes_consumed); + /* Convert each resource descriptor in the list */ - /* An End Tag indicates the end of the Resource Template */ + while (1) { + /* Validate Type before dispatch */ - done = TRUE; - break; - - case ACPI_RSTYPE_MEM24: - /* - * 24-Bit Memory Resource - */ - status = - acpi_rs_memory24_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_MEM32: - /* - * 32-Bit Memory Range Resource - */ - status = - acpi_rs_memory32_range_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_FIXED_MEM32: - /* - * 32-Bit Fixed Memory Resource - */ - status = - acpi_rs_fixed_memory32_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_ADDRESS16: - /* - * 16-Bit Address Descriptor Resource - */ - status = acpi_rs_address16_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_ADDRESS32: - /* - * 32-Bit Address Descriptor Resource - */ - status = acpi_rs_address32_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_ADDRESS64: - /* - * 64-Bit Address Descriptor Resource - */ - status = acpi_rs_address64_stream(linked_list, &buffer, - &bytes_consumed); - break; - - case ACPI_RSTYPE_EXT_IRQ: - /* - * Extended IRQ Resource - */ - status = - acpi_rs_extended_irq_stream(linked_list, &buffer, - &bytes_consumed); - break; - - default: - /* - * If we get here, everything is out of sync, - * so exit with an error - */ + if (resource->type > ACPI_RSTYPE_MAX) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid descriptor type (%X) in resource list\n", - linked_list->id)); - status = AE_BAD_DATA; - break; + resource->type)); + return_ACPI_STATUS(AE_BAD_DATA); } + /* Perform the conversion, per resource type */ + + status = acpi_gbl_stream_dispatch[resource->type] (resource, + &buffer, + &bytes_consumed); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } - /* Set the Buffer to point to the open byte */ + /* Check for end-of-list */ + + if (resource->type == ACPI_RSTYPE_END_TAG) { + /* An End Tag indicates the end of the Resource Template */ + + return_ACPI_STATUS(AE_OK); + } + + /* Set the Buffer to point to the next (output) resource descriptor */ buffer += bytes_consumed; - /* Point to the next object */ + /* Point to the next input resource object */ - linked_list = ACPI_PTR_ADD(struct acpi_resource, - linked_list, linked_list->length); + resource = ACPI_PTR_ADD(struct acpi_resource, + resource, resource->length); } - - return_ACPI_STATUS(AE_OK); } |