Texas Instruments TMS320C645x manual Uses this bit to reclaim buffers

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SRIO Functional Description

	Table 20. TX Buffer Descriptor Field Definitions (continued)
Field	Description
ownership	Ownership: Indicates ownership of the message and is valid only on sop. This bit is set
	by the host and cleared by the port when the message has been transmitted. The host
	uses this bit to reclaim buffers.
	0: The message is owned by the host
	1: The message is owned by the port
eoq	End Of Queue: Set by the port to indicate that all messages in the queue have been
	transmitted and the TX queue is empty. End of queue is determined by the port when
	the next_descriptor_pointer is zero on an eop buffer. This bit is valid only on eop.
	0: The Tx queue has more messages to transfer.
	1: The Descriptor buffer is the last buffer in the last message in the queue.
Teardown_Complete	Teardown Complete: Set by the port to indicate that the host commanded teardown
	process is complete, and the channel buffers may be reclaimed by the host.
	0: The port has not completed the teardown process.
	1: The port has completed the commanded teardown process.
retry_count	Message Retry Count: Set by the CPU to indicate the total number of retries allowed
	for this message, including all segments. Decremented by the port each time a
	message is retried.
	000000b: Infinite Retries
	000001b: Retry Message 1 time
	000002b: Retry Message 2 times
	. . .
	111111b: Retry Message 63 times
cc	Completion Code:
	000: Good Completion. Message received a done response.
	001: Transaction error. Message received an error response. *
	010: Excessive Retries. Message received more than retry_count retry responses.
	011: Transaction timeout. Transaction timer elapsed without any message response
	being received.
	100: DMA data transfer error
	101: Descriptor Programming error
	110: TX Queue Teardown Complete
	111: Outbound Credit not available.
	* An ERROR transfer completion code indicates an error in one or more segments of a
	transmitted multi-segment message.
message_length	Message Length: Message Length – Written by the CPU to specify the number of
	double-words to transmit. Message payloads are limited to a maximum size of 512
	double-words (4096bytes).
	000000000b: 512 double words
	000000001b: 1 double word
	000000010b: 2 double words
	. . .
	111111111b: 511 double words
Dest_id	Destination Node Id: Unique Node identifier for the Destination of the message.
pri	Message Priority: Specifies the SRIO priority at which the message will be sent.
	Messages should not be sent at a priority level of 3 because the message response is
	required to promote the priority to avoid system deadlock. It is the responsibility of the
	software to assign the appropriate outgoing priority.

50 Serial RapidIO (SRIO) SPRU976 –March 2006

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