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| author |   Zhu Yanjun <yanjun.zhu@linux.dev> | 2022-01-06 13:03:56 -0500 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2022-01-07 19:34:01 -0400 |
| commit | 18451db82ef7f943c60a7fce685f16172bda5106 (patch) | |
| tree | 462fc04a960dfe126b5cced14dfc3c74596eba28 /include/rdma/ib_verbs.h | |
| parent | IB/qib: Fix typos (diff) | |
| download | linux-dev-18451db82ef7f943c60a7fce685f16172bda5106.tar.xz linux-dev-18451db82ef7f943c60a7fce685f16172bda5106.zip | |
RDMA/core: Calculate UDP source port based on flow label or lqpn/rqpn
Calculate and set UDP source port based on the flow label. If flow label
is not defined in GRH then calculate it based on lqpn/rqpn.
Link: https://lore.kernel.org/r/20220106180359.2915060-2-yanjun.zhu@linux.dev
Signed-off-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/rdma/ib_verbs.h')
| -rw-r--r-- | include/rdma/ib_verbs.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 6e9ad656ecb7..69d883f7fb41 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -4749,6 +4749,23 @@ static inline u32 rdma_calc_flow_label(u32 lqpn, u32 rqpn) return (u32)(v & IB_GRH_FLOWLABEL_MASK); } +/** + * rdma_get_udp_sport - Calculate and set UDP source port based on the flow + * label. If flow label is not defined in GRH then + * calculate it based on lqpn/rqpn. + * + * @fl: flow label from GRH + * @lqpn: local qp number + * @rqpn: remote qp number + */ +static inline u16 rdma_get_udp_sport(u32 fl, u32 lqpn, u32 rqpn) +{ + if (!fl) + fl = rdma_calc_flow_label(lqpn, rqpn); + + return rdma_flow_label_to_udp_sport(fl); +} + const struct ib_port_immutable* ib_port_immutable_read(struct ib_device *dev, unsigned int port); #endif /* IB_VERBS_H */ |