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[rdma-core,1/3] libhns: Set owner bit of SQWQE in user mode

Message ID 1509530440-164400-2-git-send-email-oulijun@huawei.com (mailing list archive)
State Changes Requested
Headers show

Commit Message

Lijun Ou Nov. 1, 2017, 10 a.m. UTC 
In hip08, it needs to set owner field of sqwqe when posting
send wr. The owner field will be used by hardware. The set
algorithm as follows:
The value of owner should be 1 in the first lap, it should
be 0 in the second lap and in turn.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
---
 providers/hns/hns_roce_u_hw_v2.c | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/providers/hns/hns_roce_u_hw_v2.c b/providers/hns/hns_roce_u_hw_v2.c
index 50059bf..900387c 100644
--- a/providers/hns/hns_roce_u_hw_v2.c
+++ b/providers/hns/hns_roce_u_hw_v2.c
@@ -473,6 +473,7 @@  static int hns_roce_u_v2_arm_cq(struct ibv_cq *ibvcq, int solicited)
 static int hns_roce_u_v2_post_send(struct ibv_qp *ibvqp, struct ibv_send_wr *wr,
 				   struct ibv_send_wr **bad_wr)
 {
+	unsigned int sq_shift;
 	unsigned int ind_sge;
 	unsigned int ind;
 	int nreq;
@@ -542,6 +543,11 @@  static int hns_roce_u_v2_post_send(struct ibv_qp *ibvqp, struct ibv_send_wr *wr,
 		roce_set_bit(rc_sq_wqe->byte_4, RC_SQ_WQE_BYTE_4_SE_S,
 			     (wr->send_flags & IBV_SEND_SOLICITED) ? 1 : 0);
 
+		for (sq_shift = 0; (1 << sq_shift) < qp->sq.wqe_cnt; ++sq_shift)
+			;
+		roce_set_bit(rc_sq_wqe->byte_4, RC_SQ_WQE_BYTE_4_OWNER_S,
+			     ~(qp->sq.head >> sq_shift) & 0x1);
+
 		wqe += sizeof(struct hns_roce_rc_sq_wqe);
 		/* set remote addr segment */
 		switch (ibvqp->qp_type) {