RDMA/ocrdma: Support RoCE-v2 in the UD path

This patch adds following changes to support RoCE-v2
in the UD path.

 * During AH creation GID-type is resolved for a given gid-index.
 * Based on GID-type protocol header is built.
 * Work completion reports network header type and set
   IB_WC_WITH_NETWORK_HDR_TYPE flag in wc->wc_flags to indicate
   that the network header type is valid.

Signed-off-by: Somnath Kotur <somnath.kotur@avagotech.com>
Signed-off-by: Devesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/ocrdma/ocrdma_verbs.c

@@ -2005,6 +2005,7 @@ static void ocrdma_build_ud_hdr(struct ocrdma_qp *qp,
 	else
 		ud_hdr->qkey = ud_wr(wr)->remote_qkey;
 	ud_hdr->rsvd_ahid = ah->id;
+	ud_hdr->hdr_type = ah->hdr_type;
 	if (ah->av->valid & OCRDMA_AV_VLAN_VALID)
 		hdr->cw |= (OCRDMA_FLAG_AH_VLAN_PR << OCRDMA_WQE_FLAGS_SHIFT);
 }
@@ -2717,9 +2718,11 @@ static bool ocrdma_poll_scqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
 	return expand;
 }
 
-static int ocrdma_update_ud_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe)
+static int ocrdma_update_ud_rcqe(struct ocrdma_dev *dev, struct ib_wc *ibwc,
+				 struct ocrdma_cqe *cqe)
 {
 	int status;
+	u16 hdr_type = 0;
 
 	status = (le32_to_cpu(cqe->flags_status_srcqpn) &
 		OCRDMA_CQE_UD_STATUS_MASK) >> OCRDMA_CQE_UD_STATUS_SHIFT;
@@ -2728,7 +2731,17 @@ static int ocrdma_update_ud_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe)
 	ibwc->pkey_index = 0;
 	ibwc->wc_flags = IB_WC_GRH;
 	ibwc->byte_len = (le32_to_cpu(cqe->ud.rxlen_pkey) >>
-					OCRDMA_CQE_UD_XFER_LEN_SHIFT);
+			  OCRDMA_CQE_UD_XFER_LEN_SHIFT) &
+			  OCRDMA_CQE_UD_XFER_LEN_MASK;
+
+	if (ocrdma_is_udp_encap_supported(dev)) {
+		hdr_type = (le32_to_cpu(cqe->ud.rxlen_pkey) >>
+			    OCRDMA_CQE_UD_L3TYPE_SHIFT) &
+			    OCRDMA_CQE_UD_L3TYPE_MASK;
+		ibwc->wc_flags |= IB_WC_WITH_NETWORK_HDR_TYPE;
+		ibwc->network_hdr_type = hdr_type;
+	}
+
 	return status;
 }
 
@@ -2791,12 +2804,15 @@ static bool ocrdma_poll_err_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
 static void ocrdma_poll_success_rcqe(struct ocrdma_qp *qp,
 				     struct ocrdma_cqe *cqe, struct ib_wc *ibwc)
 {
+	struct ocrdma_dev *dev;
+
+	dev = get_ocrdma_dev(qp->ibqp.device);
 	ibwc->opcode = IB_WC_RECV;
 	ibwc->qp = &qp->ibqp;
 	ibwc->status = IB_WC_SUCCESS;
 
 	if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI)
-		ocrdma_update_ud_rcqe(ibwc, cqe);
+		ocrdma_update_ud_rcqe(dev, ibwc, cqe);
 	else
 		ibwc->byte_len = le32_to_cpu(cqe->rq.rxlen);