On Mon, Apr 18, 2016 at 7:25 PM, Majd Dibbiny <majd@xxxxxxxxxxxx> wrote:
> From: Bodong Wang <bodong@xxxxxxxxxxxx>
>
> mlx5 based hardware supports LSO for Raw Ethernet QPs.
> LSO (large segment offload) applied here is mainly used
> for TCP (also known as TSO).
>
> Signed-off-by: Bodong Wang <bodong@xxxxxxxxxxxx>
> Signed-off-by: Majd Dibbiny <majd@xxxxxxxxxxxx>
> Signed-off-by: Matan Barak <matanb@xxxxxxxxxxxx>
> ---
> drivers/infiniband/hw/mlx5/main.c | 13 +++++++++++--
> 1 file changed, 11 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
> index 5acf346..09502ad 100644
> --- a/drivers/infiniband/hw/mlx5/main.c
> +++ b/drivers/infiniband/hw/mlx5/main.c
> @@ -454,6 +454,7 @@ static int mlx5_ib_query_device(struct ib_device *ibdev,
> int max_rq_sg;
> int max_sq_sg;
> u64 min_page_size = 1ull << MLX5_CAP_GEN(mdev, log_pg_sz);
> + u64 max_lso;
>
> if (uhw->inlen || uhw->outlen)
> return -EINVAL;
> @@ -508,10 +509,18 @@ static int mlx5_ib_query_device(struct ib_device *ibdev,
> if (MLX5_CAP_GEN(mdev, block_lb_mc))
> props->device_cap_flags |= IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
>
> - if (MLX5_CAP_GEN(dev->mdev, eth_net_offloads) &&
> - (MLX5_CAP_ETH(dev->mdev, csum_cap)))
> + if (MLX5_CAP_GEN(dev->mdev, eth_net_offloads)) {
> + if (MLX5_CAP_ETH(mdev, csum_cap))
> props->device_cap_flags |= IB_DEVICE_RAW_IP_CSUM;
>
> + max_lso = MLX5_CAP_ETH(mdev, max_lso_cap);
> + if (max_lso) {
> + props->lso_caps.max_lso = 1 << max_lso;
> + props->lso_caps.supported_qpts |=
> + 1 << IB_QPT_RAW_ETHERTYPE;
what?!
This QP type is not supported by the driver
> + }
> + }
> +
> if (MLX5_CAP_GEN(mdev, ipoib_basic_offloads)) {
> props->device_cap_flags |= IB_DEVICE_UD_IP_CSUM;
> props->device_cap_flags |= IB_DEVICE_UD_TSO;
> --
--
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