RDMA/nes: Support for Packed And Unaligned fpdus

Support for Packed and Unaligned (PAU) FPDUs is needed for
interoperability between NES and non-NES nodes. When the NES hardware
detects a PAU frame, it will pass it to the driver to process the
frame.  NES driver creates a new frame for each FPDU and forwards it
to the hardware to be sent to its associated qp.

Signed-off-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Signed-off-by: Faisal Latif <Faisal.Latif@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 16 insertions, 3 deletions

diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index c118663e4437..401b7bb828d0 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -159,6 +159,15 @@ atomic_t cm_connecteds;
 atomic_t cm_connect_reqs;
 atomic_t cm_rejects;
 
+int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
+{
+        return add_ref_cm_node(cm_node);
+}
+
+int nes_rem_ref_cm_node(struct nes_cm_node *cm_node)
+{
+        return rem_ref_cm_node(cm_node->cm_core, cm_node);
+}
 
 /**
  * create_event
@@ -2331,9 +2340,13 @@ static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
                         }
                         add_ref_cm_node(cm_node);
                 } else if (cm_node->state == NES_CM_STATE_TSA) {
-                        rem_ref_cm_node(cm_core, cm_node);
-                        atomic_inc(&cm_accel_dropped_pkts);
-                        dev_kfree_skb_any(skb);
+                        if (cm_node->nesqp->pau_mode)
+                                nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
+                        else {
+                                rem_ref_cm_node(cm_core, cm_node);
+                                atomic_inc(&cm_accel_dropped_pkts);
+                                dev_kfree_skb_any(skb);
+                        }
                         break;
                 }
                 skb_reset_network_header(skb);