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It turns out that during the last T10 meeting I discovered that I
have to pass the transfer length in the CDB. I have a was to do
that, but
it is going to cost all the transfer bits. I will have a new
command doc
out next week.
Two comments on T10/04-262r3:
1. My linux implementation also finds itself needing to be told
the direction of DMA operations. I pick it up from SCSI
housekeeping structures (which is where I also get the
transfer length from.) If the direction of each transfer
was explicitly stated in the CDB, I think it would be
more self contained.
Well, TBH I think it's redundant information since libata (the Linux
implementation, for our fair readers) already carries the data
direction implicitly. I cannot see a case where the data direction
is not available at all.
Vendor-specific & newly standard ops?
Pat LaVarre
