[IB] CM: Fix initialization of QP attributes for UC QPs.

Fix cm_init_qp_init_attr(), cm_init_qp_rtr_attr() and cm_init_qp_rts_attr()
so that they correctly handle the differences between UC and RC QPs.  This
fixes problems with setting up UC QPs through the CM.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 24 insertions, 14 deletions

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index 3fe6f4754fa8..389fecbaf662 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -135,6 +135,7 @@ struct cm_id_private {
         __be64 tid;
         __be32 local_qpn;
         __be32 remote_qpn;
+        enum ib_qp_type qp_type;
         __be32 sq_psn;
         __be32 rq_psn;
         int timeout_ms;
@@ -926,6 +927,7 @@ int ib_send_cm_req(struct ib_cm_id *cm_id,
         cm_id_priv->responder_resources = param->responder_resources;
         cm_id_priv->retry_count = param->retry_count;
         cm_id_priv->path_mtu = param->primary_path->mtu;
+        cm_id_priv->qp_type = param->qp_type;
 
         ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
         if (ret)
@@ -1320,6 +1322,7 @@ static int cm_req_handler(struct cm_work *work)
                                 cm_req_get_primary_local_ack_timeout(req_msg);
         cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
         cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
+        cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
 
         cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
         cm_process_work(cm_id_priv, work);
@@ -3079,10 +3082,10 @@ static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
         case IB_CM_ESTABLISHED:
                 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
                                 IB_QP_PKEY_INDEX | IB_QP_PORT;
-                qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE;
+                qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE |
+                                           IB_ACCESS_REMOTE_WRITE;
                 if (cm_id_priv->responder_resources)
-                        qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_WRITE |
-                                                    IB_ACCESS_REMOTE_READ;
+                        qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ;
                 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
                 qp_attr->port_num = cm_id_priv->av.port->port_num;
                 ret = 0;
@@ -3112,14 +3115,18 @@ static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
         case IB_CM_MRA_REP_RCVD:
         case IB_CM_ESTABLISHED:
                 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
-                                IB_QP_DEST_QPN | IB_QP_RQ_PSN |
-                                IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER;
+                                IB_QP_DEST_QPN | IB_QP_RQ_PSN;
                 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
                 qp_attr->path_mtu = cm_id_priv->path_mtu;
                 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
                 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
-                qp_attr->max_dest_rd_atomic = cm_id_priv->responder_resources;
-                qp_attr->min_rnr_timer = 0;
+                if (cm_id_priv->qp_type == IB_QPT_RC) {
+                        *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
+                                         IB_QP_MIN_RNR_TIMER;
+                        qp_attr->max_dest_rd_atomic =
+                                        cm_id_priv->responder_resources;
+                        qp_attr->min_rnr_timer = 0;
+                }
                 if (cm_id_priv->alt_av.ah_attr.dlid) {
                         *qp_attr_mask |= IB_QP_ALT_PATH;
                         qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
@@ -3148,14 +3155,17 @@ static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
         case IB_CM_REP_SENT:
         case IB_CM_MRA_REP_RCVD:
         case IB_CM_ESTABLISHED:
-                *qp_attr_mask = IB_QP_STATE | IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
-                                IB_QP_RNR_RETRY | IB_QP_SQ_PSN |
-                                IB_QP_MAX_QP_RD_ATOMIC;
-                qp_attr->timeout = cm_id_priv->local_ack_timeout;
-                qp_attr->retry_cnt = cm_id_priv->retry_count;
-                qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
+                *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
                 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
-                qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
+                if (cm_id_priv->qp_type == IB_QPT_RC) {
+                        *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
+                                         IB_QP_RNR_RETRY |
+                                         IB_QP_MAX_QP_RD_ATOMIC;
+                        qp_attr->timeout = cm_id_priv->local_ack_timeout;
+                        qp_attr->retry_cnt = cm_id_priv->retry_count;
+                        qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
+                        qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
+                }
                 if (cm_id_priv->alt_av.ah_attr.dlid) {
                         *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
                         qp_attr->path_mig_state = IB_MIG_REARM;