[ACPI] ACPICA 20050930

Completed a major overhaul of the Resource Manager code -
specifically, optimizations in the area of the AML/internal
resource conversion code. The code has been optimized to
simplify and eliminate duplicated code, CPU stack use has
been decreased by optimizing function parameters and local
variables, and naming conventions across the manager have
been standardized for clarity and ease of maintenance (this
includes function, parameter, variable, and struct/typedef
names.)

All Resource Manager dispatch and information tables have
been moved to a single location for clarity and ease of
maintenance. One new file was created, named "rsinfo.c".

The ACPI return macros (return_ACPI_STATUS, etc.) have
been modified to guarantee that the argument is
not evaluated twice, making them less prone to macro
side-effects. However, since there exists the possibility
of additional stack use if a particular compiler cannot
optimize them (such as in the debug generation case),
the original macros are optionally available.  Note that
some invocations of the return_VALUE macro may now cause
size mismatch warnings; the return_UINT8 and return_UINT32
macros are provided to eliminate these. (From Randy Dunlap)

Implemented a new mechanism to enable debug tracing for
individual control methods. A new external interface,
acpi_debug_trace(), is provided to enable this mechanism. The
intent is to allow the host OS to easily enable and disable
tracing for problematic control methods. This interface
can be easily exposed to a user or debugger interface if
desired. See the file psxface.c for details.

acpi_ut_callocate() will now return a valid pointer if a
length of zero is specified - a length of one is used
and a warning is issued. This matches the behavior of
acpi_ut_allocate().

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

1 files changed, 435 insertions, 2 deletions

diff --git a/drivers/acpi/resources/rsutils.c b/drivers/acpi/resources/rsutils.c
index 4446778eaf7..9d503de1a34 100644
--- a/drivers/acpi/resources/rsutils.c
+++ b/drivers/acpi/resources/rsutils.c
@@ -50,6 +50,438 @@ ACPI_MODULE_NAME("rsutils")
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_rs_move_data
+ *
+ * PARAMETERS:  Destination         - Pointer to the destination descriptor
+ *              Source              - Pointer to the source descriptor
+ *              item_count          - How many items to move
+ *              move_type           - Byte width
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Move multiple data items from one descriptor to another. Handles
+ *              alignment issues and endian issues if necessary, as configured
+ *              via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
+ *
+ ******************************************************************************/
+void
+acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type)
+{
+	acpi_native_uint i;
+
+	/* One move per item */
+
+	for (i = 0; i < item_count; i++) {
+		switch (move_type) {
+		case ACPI_MOVE_TYPE_16_TO_32:
+			ACPI_MOVE_16_TO_32(&((u32 *) destination)[i],
+					   &((u16 *) source)[i]);
+			break;
+
+		case ACPI_MOVE_TYPE_32_TO_16:
+			ACPI_MOVE_32_TO_16(&((u16 *) destination)[i],
+					   &((u32 *) source)[i]);
+			break;
+
+		case ACPI_MOVE_TYPE_32_TO_32:
+			ACPI_MOVE_32_TO_32(&((u32 *) destination)[i],
+					   &((u32 *) source)[i]);
+			break;
+
+		case ACPI_MOVE_TYPE_64_TO_64:
+			ACPI_MOVE_64_TO_64(&((u64 *) destination)[i],
+					   &((u64 *) source)[i]);
+			break;
+
+		default:
+			return;
+		}
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_get_resource_info
+ *
+ * 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.
+ *
+ ******************************************************************************/
+
+struct acpi_resource_info *acpi_rs_get_resource_info(u8 resource_type)
+{
+	struct acpi_resource_info *size_info;
+
+	ACPI_FUNCTION_ENTRY();
+
+	/* Determine if this is a small or large resource */
+
+	if (resource_type & ACPI_RESOURCE_NAME_LARGE) {
+		/* Large Resource Type -- bits 6:0 contain the name */
+
+		if (resource_type > ACPI_RESOURCE_NAME_LARGE_MAX) {
+			return (NULL);
+		}
+
+		size_info = &acpi_gbl_lg_resource_info[(resource_type &
+							ACPI_RESOURCE_NAME_LARGE_MASK)];
+	} else {
+		/* Small Resource Type -- bits 6:3 contain the name */
+
+		size_info = &acpi_gbl_sm_resource_info[((resource_type &
+							 ACPI_RESOURCE_NAME_SMALL_MASK)
+							>> 3)];
+	}
+
+	/* Zero entry indicates an invalid resource type */
+
+	if (!size_info->minimum_internal_struct_length) {
+		return (NULL);
+	}
+
+	return (size_info);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_get_resource_length
+ *
+ * PARAMETERS:  Aml             - Pointer to the raw AML resource descriptor
+ *
+ * RETURN:      Byte Length
+ *
+ * DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By
+ *              definition, this does not include the size of the descriptor
+ *              header or the length field itself.
+ *
+ ******************************************************************************/
+
+u16 acpi_rs_get_resource_length(union aml_resource * aml)
+{
+	u16 resource_length;
+
+	ACPI_FUNCTION_ENTRY();
+
+	/* Determine if this is a small or large resource */
+
+	if (aml->large_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
+		/* Large Resource type -- bytes 1-2 contain the 16-bit length */
+
+		ACPI_MOVE_16_TO_16(&resource_length,
+				   &aml->large_header.resource_length);
+
+	} else {
+		/* Small Resource type -- bits 2:0 of byte 0 contain the length */
+
+		resource_length = (u16) (aml->small_header.descriptor_type &
+					 ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
+	}
+
+	return (resource_length);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_get_descriptor_length
+ *
+ * PARAMETERS:  Aml             - Pointer to the raw AML resource descriptor
+ *
+ * RETURN:      Byte length
+ *
+ * DESCRIPTION: Get the total byte length of a raw AML descriptor, including the
+ *              length of the descriptor header and the length field itself.
+ *              Used to walk descriptor lists.
+ *
+ ******************************************************************************/
+
+u32 acpi_rs_get_descriptor_length(union aml_resource * aml)
+{
+	u32 descriptor_length;
+
+	ACPI_FUNCTION_ENTRY();
+
+	/* Determine if this is a small or large resource */
+
+	if (aml->large_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
+		/* Large Resource type -- bytes 1-2 contain the 16-bit length */
+
+		ACPI_MOVE_16_TO_32(&descriptor_length,
+				   &aml->large_header.resource_length);
+		descriptor_length += sizeof(struct aml_resource_large_header);
+
+	} else {
+		/* Small Resource type -- bits 2:0 of byte 0 contain the length */
+
+		descriptor_length = (u32) (aml->small_header.descriptor_type &
+					   ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
+		descriptor_length += sizeof(struct aml_resource_small_header);
+	}
+
+	return (descriptor_length);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_set_resource_header
+ *
+ * PARAMETERS:  descriptor_type     - Byte to be inserted as the type
+ *              total_length        - Length of the AML descriptor, including
+ *                                    the header and length fields.
+ *              Aml                 - Pointer to the raw AML descriptor
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Set the descriptor_type and resource_length fields of an AML
+ *              resource descriptor, both Large and Small descriptors are
+ *              supported automatically
+ *
+ ******************************************************************************/
+
+void
+acpi_rs_set_resource_header(u8 descriptor_type,
+			    acpi_size total_length, union aml_resource *aml)
+{
+	u16 resource_length;
+
+	ACPI_FUNCTION_ENTRY();
+
+	/* Set the descriptor type */
+
+	aml->small_header.descriptor_type = descriptor_type;
+
+	/* Determine if this is a small or large resource */
+
+	if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
+		/* Large Resource type -- bytes 1-2 contain the 16-bit length */
+
+		resource_length =
+		    (u16) (total_length -
+			   sizeof(struct aml_resource_large_header));
+
+		/* Insert length into the Large descriptor length field */
+
+		ACPI_MOVE_16_TO_16(&aml->large_header.resource_length,
+				   &resource_length);
+	} else {
+		/* Small Resource type -- bits 2:0 of byte 0 contain the length */
+
+		resource_length =
+		    (u16) (total_length -
+			   sizeof(struct aml_resource_small_header));
+
+		/* Insert length into the descriptor type byte */
+
+		aml->small_header.descriptor_type |= (u8) resource_length;
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_get_resource_type
+ *
+ * PARAMETERS:  resource_type       - Byte 0 of a resource descriptor
+ *
+ * RETURN:      The Resource Type with no extraneous bits (except the
+ *              Large/Small descriptor bit -- this is left alone)
+ *
+ * DESCRIPTION: Extract the Resource Type/Name from the first byte of
+ *              a resource descriptor.
+ *
+ ******************************************************************************/
+
+u8 acpi_rs_get_resource_type(u8 resource_type)
+{
+	ACPI_FUNCTION_ENTRY();
+
+	/* Determine if this is a small or large resource */
+
+	if (resource_type & ACPI_RESOURCE_NAME_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_RESOURCE_NAME_SMALL_MASK));
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_strcpy
+ *
+ * PARAMETERS:  Destination         - Pointer to the destination string
+ *              Source              - Pointer to the source string
+ *
+ * RETURN:      String length, including NULL terminator
+ *
+ * DESCRIPTION: Local string copy that returns the string length, saving a
+ *              strcpy followed by a strlen.
+ *
+ ******************************************************************************/
+
+static u16 acpi_rs_strcpy(char *destination, char *source)
+{
+	u16 i;
+
+	ACPI_FUNCTION_ENTRY();
+
+	for (i = 0; source[i]; i++) {
+		destination[i] = source[i];
+	}
+
+	destination[i] = 0;
+
+	/* Return string length including the NULL terminator */
+
+	return ((u16) (i + 1));
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_get_resource_source
+ *
+ * PARAMETERS:  resource_length     - Length field of the descriptor
+ *              minimum_length      - Minimum length of the descriptor (minus
+ *                                    any optional fields)
+ *              resource_source     - Where the resource_source is returned
+ *              Aml                 - Pointer to the raw AML descriptor
+ *              string_ptr          - (optional) where to store the actual
+ *                                    resource_source string
+ *
+ * RETURN:      Length of the string plus NULL terminator, rounded up to 32 bit
+ *
+ * DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor
+ *              to an internal resource descriptor
+ *
+ ******************************************************************************/
+
+u16
+acpi_rs_get_resource_source(u16 resource_length,
+			    acpi_size minimum_length,
+			    struct acpi_resource_source * resource_source,
+			    union aml_resource * aml, char *string_ptr)
+{
+	acpi_size total_length;
+	u8 *aml_resource_source;
+
+	ACPI_FUNCTION_ENTRY();
+
+	total_length =
+	    resource_length + sizeof(struct aml_resource_large_header);
+	aml_resource_source = ((u8 *) aml) + minimum_length;
+
+	/*
+	 * resource_source is present if the length of the descriptor is longer than
+	 * the minimum length.
+	 *
+	 * Note: Some resource descriptors will have an additional null, so
+	 * we add 1 to the minimum length.
+	 */
+	if (total_length > (minimum_length + 1)) {
+		/* Get the resource_source_index */
+
+		resource_source->index = aml_resource_source[0];
+
+		resource_source->string_ptr = string_ptr;
+		if (!string_ptr) {
+			/*
+			 * String destination pointer is not specified; Set the String
+			 * pointer to the end of the current resource_source structure.
+			 */
+			resource_source->string_ptr = (char *)
+			    ((u8 *) resource_source) +
+			    sizeof(struct acpi_resource_source);
+		}
+
+		/* Copy the resource_source string to the destination */
+
+		resource_source->string_length =
+		    acpi_rs_strcpy(resource_source->string_ptr,
+				   (char *)&aml_resource_source[1]);
+
+		/*
+		 * In order for the struct_size to fall on a 32-bit boundary,
+		 * calculate the length of the string and expand the
+		 * struct_size to the next 32-bit boundary.
+		 */
+		return ((u16)
+			ACPI_ROUND_UP_to_32_bITS(resource_source->
+						 string_length));
+	} else {
+		/* resource_source is not present */
+
+		resource_source->index = 0;
+		resource_source->string_length = 0;
+		resource_source->string_ptr = NULL;
+		return (0);
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_set_resource_source
+ *
+ * PARAMETERS:  Aml                 - Pointer to the raw AML descriptor
+ *              minimum_length      - Minimum length of the descriptor (minus
+ *                                    any optional fields)
+ *              resource_source     - Internal resource_source
+
+ *
+ * RETURN:      Total length of the AML descriptor
+ *
+ * DESCRIPTION: Convert an optoinal resource_source from internal format to a
+ *              raw AML resource descriptor
+ *
+ ******************************************************************************/
+
+acpi_size
+acpi_rs_set_resource_source(union aml_resource * aml,
+			    acpi_size minimum_length,
+			    struct acpi_resource_source * resource_source)
+{
+	u8 *aml_resource_source;
+	acpi_size descriptor_length;
+
+	ACPI_FUNCTION_ENTRY();
+
+	descriptor_length = minimum_length;
+
+	/* 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 = ((u8 *) aml) + minimum_length;
+
+		/* Copy the resource_source_index */
+
+		aml_resource_source[0] = (u8) resource_source->index;
+
+		/* Copy the resource_source string */
+
+		ACPI_STRCPY((char *)&aml_resource_source[1],
+			    resource_source->string_ptr);
+
+		/*
+		 * Add the length of the string (+ 1 for null terminator) to the
+		 * final descriptor length
+		 */
+		descriptor_length +=
+		    ((acpi_size) resource_source->string_length + 1);
+	}
+
+	/* Return the new total length of the AML descriptor */
+
+	return (descriptor_length);
+}
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_rs_get_prt_method_data
  *
  * PARAMETERS:  Handle          - a handle to the containing object
@@ -65,8 +497,9 @@ ACPI_MODULE_NAME("rsutils")
  *              and the contents of the callers buffer is undefined.
  *
  ******************************************************************************/
+
 acpi_status
-acpi_rs_get_prt_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer)
+acpi_rs_get_prt_method_data(acpi_handle handle, struct acpi_buffer * ret_buffer)
 {
 	union acpi_operand_object *obj_desc;
 	acpi_status status;
@@ -284,7 +717,7 @@ acpi_rs_set_srs_method_data(acpi_handle handle, struct acpi_buffer *in_buffer)
 	 * Convert the linked list into a byte stream
 	 */
 	buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
-	status = acpi_rs_create_byte_stream(in_buffer->pointer, &buffer);
+	status = acpi_rs_create_aml_resources(in_buffer->pointer, &buffer);
 	if (ACPI_FAILURE(status)) {
 		return_ACPI_STATUS(status);
 	}