P1394 Mail Archive: P1394> Re: The "sbp_status" value for negative residual

P1394 Mail Archive: P1394> Re: The "sbp_status" value for negative residual

P1394> Re: The "sbp_status" value for negative residual

Fri, 3 Dec 1999 01:07:26 EST

In a message dated 99-11-28 19:24:52 EST, shimura@pure.cpdc.canon.co.jp

<<... [the table] specifies the value of "sbp_status" as eight (resources
unavailable) for negative residual case.

I thought that the "sbp_status" of "resources unavailable" means insufficient
SBP-2 resources in the "target" has prevented the target from processing the

I don't think it necessarily has this connotation of target resources, but
that doesn't necessarily mean I disagree with your conclusion!

<<In T2I case, target stores a negative residual completion status because
the buffer provided by the "initiator" was too small to transfer the service

In I2T case, a negative residual would be returned because of the lack of
target's resource, but lacking resource would not be an SBP-2 resource but a
receiving buffer for the service data outside SBP-2.

Thus, from the above observation, appropriate "sbp_status" seems to be zero
(no additional info. to report).>>

A zero value for sbp_status when residual is negative seems OK to me. I'm
making the change in PPDT_r08 with the usual caution that nothing is final in
that document until reviewed by the working group.

<<By the way, there seems to be a few editorial things in the same table. The
"sbp_status" values "4x" and "2x" in case of "resp" equal TRANSPORT_FAILURE
will be "8x(10rr xxxx): page table" and "4x(01rr xxxx)": data buffer)
respectively. Also, the "sbp_status" value "FF(unspecified)" will need to be
added in conformity with the SBP-2 definition.>>

Thank you, Shimura-san. Fixed in the forthcoming draft.


Peter Johansson

Congruent Software, Inc.
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Berkeley, CA 94707

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