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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: zhihong.wang@intel.com, tiwei.bie@intel.com, dev@dpdk.org
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [dpdk-dev] [PATCH v3 3/5] net/vhost: improve Tx path selection
Date: Thu,  7 Jun 2018 11:26:14 +0200	[thread overview]
Message-ID: <20180607092616.27720-4-maxime.coquelin@redhat.com> (raw)
In-Reply-To: <20180607092616.27720-1-maxime.coquelin@redhat.com>

This patch improves the Tx path selection depending on
whether the application request for offloads, and on whether
offload features have been negotiated.

When the application doesn't request for Tx offload features,
the corresponding features bits aren't negotiated.

When Tx offload virtio features have been negotiated, ensure
the simple Tx path isn't selected.

Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 drivers/net/virtio/virtio_ethdev.c | 21 +++++++++++++++++++--
 drivers/net/virtio/virtio_ethdev.h |  3 ---
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index c6087d9b1..870bd727e 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1860,8 +1860,10 @@ static int
 virtio_dev_configure(struct rte_eth_dev *dev)
 {
 	const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
+	const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
 	struct virtio_hw *hw = dev->data->dev_private;
 	uint64_t rx_offloads = rxmode->offloads;
+	uint64_t tx_offloads = txmode->offloads;
 	uint64_t req_features;
 	int ret;
 
@@ -1887,6 +1889,15 @@ virtio_dev_configure(struct rte_eth_dev *dev)
 			(1ULL << VIRTIO_NET_F_GUEST_TSO4) |
 			(1ULL << VIRTIO_NET_F_GUEST_TSO6);
 
+	if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
+			   DEV_TX_OFFLOAD_TCP_CKSUM))
+		req_features |= (1ULL << VIRTIO_NET_F_CSUM);
+
+	if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
+		req_features |=
+			(1ULL << VIRTIO_NET_F_HOST_TSO4) |
+			(1ULL << VIRTIO_NET_F_HOST_TSO6);
+
 	/* if request features changed, reinit the device */
 	if (req_features != hw->req_guest_features) {
 		ret = virtio_init_device(dev, req_features);
@@ -1955,6 +1966,12 @@ virtio_dev_configure(struct rte_eth_dev *dev)
 			   DEV_RX_OFFLOAD_TCP_CKSUM))
 		hw->use_simple_rx = 0;
 
+	if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
+			   DEV_TX_OFFLOAD_TCP_CKSUM |
+			   DEV_TX_OFFLOAD_TCP_TSO |
+			   DEV_TX_OFFLOAD_VLAN_INSERT))
+		hw->use_simple_tx = 0;
+
 	return 0;
 }
 
@@ -2208,14 +2225,14 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 
 	dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
 				    DEV_TX_OFFLOAD_VLAN_INSERT;
-	if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
+	if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
 		dev_info->tx_offload_capa |=
 			DEV_TX_OFFLOAD_UDP_CKSUM |
 			DEV_TX_OFFLOAD_TCP_CKSUM;
 	}
 	tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
 		(1ULL << VIRTIO_NET_F_HOST_TSO6);
-	if ((hw->guest_features & tso_mask) == tso_mask)
+	if ((host_features & tso_mask) == tso_mask)
 		dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
 }
 
diff --git a/drivers/net/virtio/virtio_ethdev.h b/drivers/net/virtio/virtio_ethdev.h
index bb40064ea..b603665c7 100644
--- a/drivers/net/virtio/virtio_ethdev.h
+++ b/drivers/net/virtio/virtio_ethdev.h
@@ -28,9 +28,6 @@
 	 1u << VIRTIO_NET_F_CTRL_VQ	  |	\
 	 1u << VIRTIO_NET_F_CTRL_RX	  |	\
 	 1u << VIRTIO_NET_F_CTRL_VLAN	  |	\
-	 1u << VIRTIO_NET_F_CSUM	  |	\
-	 1u << VIRTIO_NET_F_HOST_TSO4	  |	\
-	 1u << VIRTIO_NET_F_HOST_TSO6	  |	\
 	 1u << VIRTIO_NET_F_MRG_RXBUF	  |	\
 	 1u << VIRTIO_NET_F_MTU	| \
 	 1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE |	\
-- 
2.14.3

  parent reply	other threads:[~2018-06-07  9:26 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-07  9:26 [dpdk-dev] [PATCH v3 0/5] net/virtio: Tx path selection and offload improvements Maxime Coquelin
2018-06-07  9:26 ` [dpdk-dev] [PATCH v3 1/5] net/virtio: forbid simple Tx path by default Maxime Coquelin
2018-06-12  6:35   ` Tiwei Bie
2018-06-12 11:52     ` Maxime Coquelin
2018-06-07  9:26 ` [dpdk-dev] [PATCH v3 2/5] net/virtio: use simple path for Tx even if Rx mergeable Maxime Coquelin
2018-06-12  6:18   ` Tiwei Bie
2018-06-07  9:26 ` Maxime Coquelin [this message]
2018-06-07  9:26 ` [dpdk-dev] [PATCH v3 4/5] net/virtio: don't use simple Rx if TCP LRO or VLAN strip requested Maxime Coquelin
2018-06-07  9:26 ` [dpdk-dev] [PATCH v3 5/5] net/virtio: improve offload check performance Maxime Coquelin

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