net/mlx5e: Use fragments of the same size in non-linear legacy RQ with XDP
XDP multi buffer implementation in the kernel assumes that all fragments have the same size. bpf_xdp_frags_increase_tail uses this assumption to get the size of the last fragment, and __xdp_build_skb_from_frame uses it to calculate truesize as nr_frags * xdpf->frame_sz. The current implementation of mlx5e uses fragments of different size in non-linear legacy RQ. Specifically, the last fragment can be larger than the others. It's an optimization for packets smaller than MTU. This commit adapts mlx5e to the kernel limitations and makes it use fragments of the same size, in order to add support for XDP multi buffer. The change is applied only if XDP is active, otherwise the old optimization still applies. Signed-off-by:Maxim Mikityanskiy <maximmi@nvidia.com> Reviewed-by:
Tariq Toukan <tariqt@nvidia.com> Signed-off-by:
Saeed Mahameed <saeedm@nvidia.com>
parent
4e8231f1
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