RDMA/cxgb4: Configure 0B MRs to match HW implementation

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0B MRs need some tweaks to work correctly with HW. When writing the
TPTE, if the MR length is zero we now:

1) turn off all permissions
2) set the length to -1

While functionality/capabilities of the MR are the same with these
changes, it resolves a dapltest 0B RDMA Read test failure.  Based on
original work by Steve Wise <swise@opengridcomputing.com>.

Signed-off-by: Pramod Kumar <pramod@chelsio.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

...

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Pramod Kumar 2014-11-21 09:36:35 -06:00 • committed by Roland Dreier

parent 63a71ba617

commit 123bc2a27a

1 changed files with 4 additions and 2 deletions

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drivers/infiniband/hw/cxgb4/mem.c

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