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net/virtio: set offload flag for jumbo frames

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Port configuration fails because offload flags don't match the expected
value when max-pkt-len is set to a value that should enable receive port
offloading but doesn't.

The .dev_infos_get callback can be called before the configure callback.
At that time we don't know the maximum packet size yet because it is
only set up when ports are started. So in virtio_dev_info_get() just
always set the jumbo packet offload flag.

Check the maximum packet length at device configure time, because then we
have access to the max-pkt-len value provided by the user. If the
max-pkt-len exceeds the maximum MTU supported by the device we remove
the VIRTIO_NET_F_MTU flag from requested features.

Fixes: a4996bd89c ("ethdev: new Rx/Tx offloads API")
Cc: stable@dpdk.org

Signed-off-by: Jens Freimann <jfreimann@redhat.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Jens Freimann 2019-02-05 12:17:02 +01:00 committed by Ferruh Yigit
parent 4b058fdd27
commit 8b90e43581
1 changed files with 6 additions and 0 deletions
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6
drivers/net/virtio/virtio_ethdev.c
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@ -1972,6 +1972,8 @@ 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;
uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
hw->vtnet_hdr_size;
uint64_t rx_offloads = rxmode->offloads;
uint64_t tx_offloads = txmode->offloads;
uint64_t req_features;
@ -1986,6 +1988,9 @@ virtio_dev_configure(struct rte_eth_dev *dev)
return ret;
}
if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
DEV_RX_OFFLOAD_TCP_CKSUM))
req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
@ -2339,6 +2344,7 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
host_features = VTPCI_OPS(hw)->get_features(hw);
dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
dev_info->rx_offload_capa |=
DEV_RX_OFFLOAD_TCP_CKSUM |