net/enic: add the simple version of Tx handler

[dpdk.git] / drivers / net / enic / enic_main.c

diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index c03ec24..e89105d 100644 (file)
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -493,6 +493,27 @@ static void enic_rxq_intr_deinit(struct enic *enic)
        }
 }
 
+static void enic_prep_wq_for_simple_tx(struct enic *enic, uint16_t queue_idx)
+{
+       struct wq_enet_desc *desc;
+       struct vnic_wq *wq;
+       unsigned int i;
+
+       /*
+        * Fill WQ descriptor fields that never change. Every descriptor is
+        * one packet, so set EOP. Also set CQ_ENTRY every ENIC_WQ_CQ_THRESH
+        * descriptors (i.e. request one completion update every 32 packets).
+        */
+       wq = &enic->wq[queue_idx];
+       desc = (struct wq_enet_desc *)wq->ring.descs;
+       for (i = 0; i < wq->ring.desc_count; i++, desc++) {
+               desc->header_length_flags = 1 << WQ_ENET_FLAGS_EOP_SHIFT;
+               if (i % ENIC_WQ_CQ_THRESH == ENIC_WQ_CQ_THRESH - 1)
+                       desc->header_length_flags |=
+                               (1 << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT);
+       }
+}
+
 int enic_enable(struct enic *enic)
 {
        unsigned int index;
@@ -535,6 +556,21 @@ int enic_enable(struct enic *enic)
                }
        }
 
+       /*
+        * Use the simple TX handler if possible. All offloads must be disabled
+        * except mbuf fast free.
+        */
+       if ((eth_dev->data->dev_conf.txmode.offloads &
+            ~DEV_TX_OFFLOAD_MBUF_FAST_FREE) == 0) {
+               PMD_INIT_LOG(DEBUG, " use the simple tx handler");
+               eth_dev->tx_pkt_burst = &enic_simple_xmit_pkts;
+               for (index = 0; index < enic->wq_count; index++)
+                       enic_prep_wq_for_simple_tx(enic, index);
+       } else {
+               PMD_INIT_LOG(DEBUG, " use the default tx handler");
+               eth_dev->tx_pkt_burst = &enic_xmit_pkts;
+       }
+
        for (index = 0; index < enic->wq_count; index++)
                enic_start_wq(enic, index);
        for (index = 0; index < enic->rq_count; index++)