[dpdk-dev] [PATCH v3 3/5] net/ixgbe: remove limit of ixgbe_xmit_pkts_vec burst size

[Zhiyong Yang <zhiyong.yang@intel.com>]

To add a wrapper function to remove the limit of tx burst size and
implement the "make an best effort to transmit the pkts" policy.
The patch makes ixgbe vec function work in a consistent behavior
like ixgbe_xmit_pkts_simple and ixgbe_xmit_pkts do that.

Cc: Helin Zhang <helin.zhang@intel.com>
Cc: Konstantin Ananyev <konstantin.ananyev@intel.com>
Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
---
 drivers/net/ixgbe/ixgbe_rxtx.c          | 29 +++++++++++++++++++++++++++++
 drivers/net/ixgbe/ixgbe_rxtx.h          |  4 ++--
 drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c |  4 ++--
 drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c  |  4 ++--
 4 files changed, 35 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index c080566..8541b14 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -111,6 +111,11 @@
 #define rte_ixgbe_prefetch(p)   do {} while (0)
 #endif
 
+#ifdef RTE_IXGBE_INC_VECTOR
+uint16_t ixgbe_xmit_fixed_burst_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
+				    uint16_t nb_pkts);
+#endif
+
 /*********************************************************************
  *
  *  TX functions
@@ -363,6 +368,30 @@ ixgbe_xmit_pkts_simple(void *tx_queue, struct rte_mbuf **tx_pkts,
 	return nb_tx;
 }
 
+#ifdef RTE_IXGBE_INC_VECTOR
+static uint16_t
+ixgbe_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
+		    uint16_t nb_pkts)
+{
+	uint16_t nb_tx = 0;
+	struct ixgbe_tx_queue *txq = (struct ixgbe_tx_queue *)tx_queue;
+
+	while (nb_pkts) {
+		uint16_t ret, num;
+
+		num = (uint16_t)RTE_MIN(nb_pkts, txq->tx_rs_thresh);
+		ret = ixgbe_xmit_fixed_burst_vec(tx_queue, &tx_pkts[nb_tx],
+						 num);
+		nb_tx += ret;
+		nb_pkts -= ret;
+		if (ret < num)
+			break;
+	}
+
+	return nb_tx;
+}
+#endif
+
 static inline void
 ixgbe_set_xmit_ctx(struct ixgbe_tx_queue *txq,
 		volatile struct ixgbe_adv_tx_context_desc *ctx_txd,
diff --git a/drivers/net/ixgbe/ixgbe_rxtx.h b/drivers/net/ixgbe/ixgbe_rxtx.h
index 739fd19..1ffab4c 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.h
+++ b/drivers/net/ixgbe/ixgbe_rxtx.h
@@ -311,8 +311,8 @@ void ixgbe_rx_queue_release_mbufs_vec(struct ixgbe_rx_queue *rxq);
 
 #ifdef RTE_IXGBE_INC_VECTOR
 
-uint16_t ixgbe_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
-		uint16_t nb_pkts);
+uint16_t ixgbe_xmit_fixed_burst_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
+				    uint16_t nb_pkts);
 int ixgbe_txq_vec_setup(struct ixgbe_tx_queue *txq);
 
 #endif /* RTE_IXGBE_INC_VECTOR */
diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c b/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c
index e2715cb..5930aa1 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c
@@ -451,8 +451,8 @@ vtx(volatile union ixgbe_adv_tx_desc *txdp,
 }
 
 uint16_t
-ixgbe_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
-		       uint16_t nb_pkts)
+ixgbe_xmit_fixed_burst_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
+			   uint16_t nb_pkts)
 {
 	struct ixgbe_tx_queue *txq = (struct ixgbe_tx_queue *)tx_queue;
 	volatile union ixgbe_adv_tx_desc *txdp;
diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c b/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
index abbf284..0861d91 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
@@ -537,8 +537,8 @@ vtx(volatile union ixgbe_adv_tx_desc *txdp,
 }
 
 uint16_t
-ixgbe_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
-		       uint16_t nb_pkts)
+ixgbe_xmit_fixed_burst_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
+			   uint16_t nb_pkts)
 {
 	struct ixgbe_tx_queue *txq = (struct ixgbe_tx_queue *)tx_queue;
 	volatile union ixgbe_adv_tx_desc *txdp;
-- 
2.7.4