From: Adrien Mazarguil <adrien.mazarguil@6wind.com>
Date: Fri, 30 Oct 2015 18:55:17 +0000 (+0100)
Subject: mlx5: enable multi packet send WR in Tx CQ
X-Git-Tag: spdx-start~8242
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=2bbd8c9f8c8f246a17d8748b6d433007bcb1f790;hp=ae018afe866764adc920aad3d1237f708a5c3aea;p=dpdk.git

mlx5: enable multi packet send WR in Tx CQ

For adapters that support it, this flag improves performance outside of VF
context.

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
---

diff --git a/drivers/net/mlx5/Makefile b/drivers/net/mlx5/Makefile
index 2f9f2b825c..ae568e61a1 100644
--- a/drivers/net/mlx5/Makefile
+++ b/drivers/net/mlx5/Makefile
@@ -120,6 +120,11 @@ mlx5_autoconf.h: $(RTE_SDK)/scripts/auto-config-h.sh
 		HAVE_FLOW_SPEC_IPV6 \
 		infiniband/verbs.h \
 		type 'struct ibv_exp_flow_spec_ipv6' $(AUTOCONF_OUTPUT)
+	$Q sh -- '$<' '$@' \
+		HAVE_EXP_QP_BURST_CREATE_ENABLE_MULTI_PACKET_SEND_WR \
+		infiniband/verbs.h \
+		enum IBV_EXP_QP_BURST_CREATE_ENABLE_MULTI_PACKET_SEND_WR \
+		$(AUTOCONF_OUTPUT)
 
 mlx5.o: mlx5_autoconf.h
 
diff --git a/drivers/net/mlx5/mlx5_txq.c b/drivers/net/mlx5/mlx5_txq.c
index a53b128413..aa7581fb22 100644
--- a/drivers/net/mlx5/mlx5_txq.c
+++ b/drivers/net/mlx5/mlx5_txq.c
@@ -395,6 +395,13 @@ txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc,
 		.intf_scope = IBV_EXP_INTF_GLOBAL,
 		.intf = IBV_EXP_INTF_QP_BURST,
 		.obj = tmpl.qp,
+#ifdef HAVE_EXP_QP_BURST_CREATE_ENABLE_MULTI_PACKET_SEND_WR
+		/* Multi packet send WR can only be used outside of VF. */
+		.family_flags =
+			(!priv->vf ?
+			 IBV_EXP_QP_BURST_CREATE_ENABLE_MULTI_PACKET_SEND_WR :
+			 0),
+#endif
 	};
 	tmpl.if_qp = ibv_exp_query_intf(priv->ctx, &attr.params, &status);
 	if (tmpl.if_qp == NULL) {