RDMA/hns: Fix wrong assignment of lp_pktn_ini in QPC

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The RoCE Engine will schedule to another QP after one has sent
(2 ^ lp_pktn_ini) packets. lp_pktn_ini is set in QPC and should be
calculated from 2 factors:

1. current MTU as a integer
2. the RoCE Engine's maximum slice length 64KB

But the driver use MTU as a enum ib_mtu and the max inline capability, the
lp_pktn_ini will be much bigger than expected which may cause traffic of
some QPs to never get scheduled.

Fixes: b713128de7 ("RDMA/hns: Adjust lp_pktn_ini dynamically")
Link: https://lore.kernel.org/r/1594726138-49294-1-git-send-email-liweihang@huawei.com
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Weihang Li 2020-07-14 19:28:58 +08:00 • committed by Jason Gunthorpe

parent c3d6057e07

commit 7b9bd73ed1

1 changed files with 22 additions and 12 deletions

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drivers/infiniband/hw/hns/hns_roce_hw_v2.c

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