On 10/03/2016 11:00 AM, Olivier Matz wrote:
> Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
> ---
> drivers/net/virtio/virtio_ethdev.c | 14 ++++----
> drivers/net/virtio/virtio_ethdev.h | 2 +-
> drivers/net/virtio/virtio_rxtx.c | 69
> ++++++++++++++++++++++++++++++++++++++
> drivers/net/virtio/virtqueue.h | 1 +
> 4 files changed, 78 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/virtio/virtio_ethdev.c
> b/drivers/net/virtio/virtio_ethdev.c
> index fa56032..43cb096 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c
> @@ -1262,7 +1262,7 @@ eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
> eth_dev->data->dev_flags = dev_flags;
>
> /* reset device and negotiate default features */
> - ret = virtio_init_device(eth_dev, VIRTIO_PMD_GUEST_FEATURES);
> + ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
> if (ret < 0)
> return ret;
>
> @@ -1351,13 +1351,10 @@ virtio_dev_configure(struct rte_eth_dev *dev)
> int ret;
>
> PMD_INIT_LOG(DEBUG, "configure");
> + req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
> + if (rxmode->hw_ip_checksum)
> + req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
>
> - if (rxmode->hw_ip_checksum) {
> - PMD_DRV_LOG(ERR, "HW IP checksum not supported");
> - return -EINVAL;
> - }
> -
> - req_features = VIRTIO_PMD_GUEST_FEATURES;
> /* if request features changed, reinit the device */
> if (req_features != hw->req_guest_features) {
> ret = virtio_init_device(dev, req_features);
> @@ -1578,6 +1575,9 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct
> rte_eth_dev_info *dev_info)
> dev_info->default_txconf = (struct rte_eth_txconf) {
> .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
> };
> + dev_info->rx_offload_capa =
> + DEV_RX_OFFLOAD_TCP_CKSUM |
> + DEV_RX_OFFLOAD_UDP_CKSUM;
> }
>
> /*
> diff --git a/drivers/net/virtio/virtio_ethdev.h
> b/drivers/net/virtio/virtio_ethdev.h
> index 5d5e788..2fc9218 100644
> --- a/drivers/net/virtio/virtio_ethdev.h
> +++ b/drivers/net/virtio/virtio_ethdev.h
> @@ -54,7 +54,7 @@
> #define VIRTIO_MAX_RX_PKTLEN 9728
>
> /* Features desired/implemented by this driver. */
> -#define VIRTIO_PMD_GUEST_FEATURES \
> +#define VIRTIO_PMD_DEFAULT_GUEST_FEATURES \
> (1u << VIRTIO_NET_F_MAC | \
> 1u << VIRTIO_NET_F_STATUS | \
> 1u << VIRTIO_NET_F_MQ | \
> diff --git a/drivers/net/virtio/virtio_rxtx.c
> b/drivers/net/virtio/virtio_rxtx.c
> index 724517e..eda678a 100644
> --- a/drivers/net/virtio/virtio_rxtx.c
> +++ b/drivers/net/virtio/virtio_rxtx.c
> @@ -50,6 +50,7 @@
> #include <rte_string_fns.h>
> #include <rte_errno.h>
> #include <rte_byteorder.h>
> +#include <rte_net.h>
>
> #include "virtio_logs.h"
> #include "virtio_ethdev.h"
> @@ -627,6 +628,56 @@ virtio_update_packet_stats(struct virtnet_stats *stats,
> struct rte_mbuf *mbuf)
> }
> }
>
> +/* Optionally fill offload information in structure */
> +static int
> +virtio_rx_offload(struct rte_mbuf *m, struct virtio_net_hdr *hdr)
> +{
> + struct rte_net_hdr_lens hdr_lens;
> + uint32_t hdrlen, ptype;
> + int l4_supported = 0;
> +
> + /* nothing to do */
> + if (hdr->flags == 0 && hdr->gso_type == VIRTIO_NET_HDR_GSO_NONE)
> + return 0;
> +
> + m->ol_flags |= PKT_RX_IP_CKSUM_UNKNOWN;
> +
> + ptype = rte_net_get_ptype(m, &hdr_lens, RTE_PTYPE_ALL_MASK);
> + m->packet_type = ptype;
> + if ((ptype & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_TCP ||
> + (ptype & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_UDP ||
> + (ptype & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_SCTP)
> + l4_supported = 1;
> +
> + if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
> + hdrlen = hdr_lens.l2_len + hdr_lens.l3_len + hdr_lens.l4_len;
> + if (hdr->csum_start <= hdrlen && l4_supported) {
> + m->ol_flags |= PKT_RX_L4_CKSUM_NONE;
> + } else {
> + /* Unknown proto or tunnel, do sw cksum. We can assume
> + * the cksum field is in the first segment since the
> + * buffers we provided to the host are large enough.
> + * In case of SCTP, this will be wrong since it's a CRC
> + * but there's nothing we can do.
> + */
> + uint16_t csum, off;
> +
> + csum = rte_raw_cksum_mbuf(m, hdr->csum_start,
> + rte_pktmbuf_pkt_len(m) - hdr->csum_start);
> + if (csum != 0xffff)
Why don't we do the 1-complement if 0xffff?
> + csum = ~csum;
> + off = hdr->csum_offset + hdr->csum_start;
> + if (rte_pktmbuf_data_len(m) >= off + 1)
> + *rte_pktmbuf_mtod_offset(m, uint16_t *,
> + off) = csum;
> + }
> + } else if (hdr->flags & VIRTIO_NET_HDR_F_DATA_VALID && l4_supported) {
> + m->ol_flags |= PKT_RX_L4_CKSUM_GOOD;
> + }
> +
> + return 0;
> +}
> +
