IB/core: Support rate limit for packet pacing
Add new member rate_limit to ib_qp_attr which holds the packet pacing rate in kbps, 0 means unlimited. IB_QP_RATE_LIMIT is added to ib_attr_mask and could be used by RAW QPs when changing QP state from RTR to RTS, RTS to RTS. Signed-off-by: NBodong Wang <bodong@mellanox.com> Reviewed-by: NMatan Barak <matanb@mellanox.com> Signed-off-by: NLeon Romanovsky <leon@kernel.org> Signed-off-by: NDoug Ledford <dledford@redhat.com>
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