From: Zhu Yanjun <yanjun.zhu@xxxxxxxxx> Based on the link https://www.spinics.net/lists/linux-rdma/msg73735.html, get the source udp port number for a QP based on the local QPN. This provides a better spread of traffic across NIC RX queues. The method in the commit d3c04a3a6870 ("IB/rxe: vary the source udp port for receive scaling") is stable. So it is also adopted in this commit. Signed-off-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx> --- drivers/infiniband/hw/irdma/verbs.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c index 102dc9342f2a..2697b40a539e 100644 --- a/drivers/infiniband/hw/irdma/verbs.c +++ b/drivers/infiniband/hw/irdma/verbs.c @@ -690,6 +690,11 @@ static int irdma_cqp_create_qp_cmd(struct irdma_qp *iwqp) return status ? -ENOMEM : 0; } +static inline u16 irdma_get_src_port(struct irdma_qp *iwqp) +{ + return 0xc000 + (hash_32_generic(iwqp->ibqp.qp_num, 14) & 0x3fff); +} + static void irdma_roce_fill_and_set_qpctx_info(struct irdma_qp *iwqp, struct irdma_qp_host_ctx_info *ctx_info) { @@ -703,7 +708,7 @@ static void irdma_roce_fill_and_set_qpctx_info(struct irdma_qp *iwqp, udp_info->cwnd = iwdev->roce_cwnd; udp_info->rexmit_thresh = 2; udp_info->rnr_nak_thresh = 2; - udp_info->src_port = 0xc000; + udp_info->src_port = irdma_get_src_port(iwqp); udp_info->dst_port = ROCE_V2_UDP_DPORT; roce_info = &iwqp->roce_info; ether_addr_copy(roce_info->mac_addr, iwdev->netdev->dev_addr); -- 2.27.0
