PRP1 not min page size aligned in read/write cmds

[Keith Busch]

On Tue, Apr 04, 2017 at 06:28:30PM -0700, Nisha Miller wrote:
> We have specified Min page size as 4K in our FW. So we expect that all
> read/write commands sent to FW will operate on multiples of 4K blocks.
> However we observe that sometimes we receive read/write commands where
> the PRP1 address is not 4K aligned, e.g 0x84CD5CD50. Is this normal or
> expected?

Yes, the first PRP entry and any list pointer may have an offset. The
remaining entries can not. See section 4.3, figure 14 in NVMe 1.2.1 spec.