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RDMA/core: Calculate UDP source port based on flow label or lqpn/rqpn

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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>
This commit is contained in:
Zhu Yanjun 2022-01-06 13:03:56 -05:00 committed by Jason Gunthorpe
parent 4d2a3c169b
commit 18451db82e
1 changed files with 17 additions and 0 deletions
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17
include/rdma/ib_verbs.h
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@ -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 */