[ACPI] ACPICA 20050916

Fixed a problem within the Resource Manager where
support for the Generic Register descriptor was not fully
implemented.  This descriptor is now fully recognized,
parsed, disassembled, and displayed.

Restructured the Resource Manager code to utilize
table-driven dispatch and lookup, eliminating many of the
large switch() statements.  This reduces overall subsystem
code size and code complexity.  Affects the resource parsing
and construction, disassembly, and debug dump output.

Cleaned up and restructured the debug dump output for all
resource descriptors.  Improved readability of the output
and reduced code size.

Fixed a problem where changes to internal data structures
caused the optional ACPI_MUTEX_DEBUG code to fail
compilation if specified.

Signed-off-by: Robert Moore <Robert.Moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 173 insertions, 360 deletions

diff --git a/drivers/acpi/resources/rslist.c b/drivers/acpi/resources/rslist.c
index 103eb31c284..87e75349dd0 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);
 }