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RDMA/cm: Use DLID from inbound/outbound PathRecords as the datapath DLID
In inter-subnet cases, when inbound/outbound PRs are available, outbound_PR.dlid is used as the requestor's datapath DLID and inbound_PR.dlid is used as the responder's DLID. The inbound_PR.dlid is passed to responder side with the "ConnectReq.Primary_Local_Port_LID" field. With this solution the PERMISSIVE_LID is no longer used in Primary Local LID field. Signed-off-by: Mark Zhang <markzhang@nvidia.com> Reviewed-by: Mark Bloch <mbloch@nvidia.com> Link: https://lore.kernel.org/r/b3f6cac685bce9dde37c610be82e2c19d9e51d9e.1662631201.git.leonro@nvidia.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
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@ -175,6 +175,7 @@ struct cm_device {
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struct cm_av {
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struct cm_port *port;
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struct rdma_ah_attr ah_attr;
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u16 dlid_datapath;
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u16 pkey_index;
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u8 timeout;
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};
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@ -1304,6 +1305,7 @@ static void cm_format_req(struct cm_req_msg *req_msg,
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struct sa_path_rec *pri_path = param->primary_path;
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struct sa_path_rec *alt_path = param->alternate_path;
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bool pri_ext = false;
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__be16 lid;
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if (pri_path->rec_type == SA_PATH_REC_TYPE_OPA)
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pri_ext = opa_is_extended_lid(pri_path->opa.dlid,
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@ -1363,9 +1365,16 @@ static void cm_format_req(struct cm_req_msg *req_msg,
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htons(ntohl(sa_path_get_dlid(
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pri_path)))));
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} else {
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if (param->primary_path_inbound) {
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lid = param->primary_path_inbound->ib.dlid;
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IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
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be16_to_cpu(lid));
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} else
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IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
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be16_to_cpu(IB_LID_PERMISSIVE));
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/* Work-around until there's a way to obtain remote LID info */
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IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
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be16_to_cpu(IB_LID_PERMISSIVE));
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IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
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be16_to_cpu(IB_LID_PERMISSIVE));
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}
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@ -1520,6 +1529,10 @@ int ib_send_cm_req(struct ib_cm_id *cm_id,
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spin_lock_irqsave(&cm_id_priv->lock, flags);
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cm_move_av_from_path(&cm_id_priv->av, &av);
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if (param->primary_path_outbound)
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cm_id_priv->av.dlid_datapath =
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be16_to_cpu(param->primary_path_outbound->ib.dlid);
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if (param->alternate_path)
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cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av);
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@ -2154,6 +2167,10 @@ static int cm_req_handler(struct cm_work *work)
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NULL, 0);
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goto rejected;
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}
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if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_IB)
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cm_id_priv->av.dlid_datapath =
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IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg);
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if (cm_req_has_alt_path(req_msg)) {
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ret = cm_init_av_by_path(&work->path[1], NULL,
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&cm_id_priv->alt_av);
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@ -4113,6 +4130,10 @@ static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
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*qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
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IB_QP_DEST_QPN | IB_QP_RQ_PSN;
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qp_attr->ah_attr = cm_id_priv->av.ah_attr;
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if ((qp_attr->ah_attr.type == RDMA_AH_ATTR_TYPE_IB) &&
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cm_id_priv->av.dlid_datapath &&
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(cm_id_priv->av.dlid_datapath != 0xffff))
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qp_attr->ah_attr.ib.dlid = cm_id_priv->av.dlid_datapath;
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qp_attr->path_mtu = cm_id_priv->path_mtu;
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qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
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qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
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@ -4313,6 +4313,8 @@ static int cma_connect_ib(struct rdma_id_private *id_priv,
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}
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req.primary_path = &route->path_rec[0];
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req.primary_path_inbound = route->path_rec_inbound;
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req.primary_path_outbound = route->path_rec_outbound;
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if (route->num_pri_alt_paths == 2)
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req.alternate_path = &route->path_rec[1];
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@ -348,6 +348,8 @@ struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
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struct ib_cm_req_param {
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struct sa_path_rec *primary_path;
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struct sa_path_rec *primary_path_inbound;
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struct sa_path_rec *primary_path_outbound;
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struct sa_path_rec *alternate_path;
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const struct ib_gid_attr *ppath_sgid_attr;
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__be64 service_id;
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