IB/iser: Rewrite SG handling for RDMA logic

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After dma-mapping an SG list provided by the SCSI midlayer, iser has
to make sure the mapped SG is "aligned for RDMA" in the sense that its
possible to produce one mapping in the HCA IOMMU which represents the
whole SG. Next, the mapped SG is formatted for registration with the HCA.

This patch re-writes the logic that does the above, to make it clearer
and simpler. It also fixes a bug in the being aligned for RDMA checks,
where a "start" check wasn't done but rather only "end" check.

Signed-off-by: Alexander Nezhinsky <alexandern@voltaire.com>
Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

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Or Gerlitz 2009-11-12 11:32:27 -08:00 • committed by Roland Dreier

parent 91d3f9bacd

commit c1ccaf2478

1 changed files with 56 additions and 66 deletions

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drivers/infiniband/ulp/iser/iser_memory.c

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