net/mlx5e: Build SKB in place over the first fragment in non-linear legacy RQ

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As a performance optimization and preparation to enabling XDP multi
buffer on non-linear legacy RQ, build the linear part of the SKB over
the first fragment, instead of allocating a new buffer and copying the
first 256 bytes there.

To achieve this, add headroom and tailroom to the first fragment.

Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

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Maxim Mikityanskiy 2022-01-26 17:18:26 +02:00 • committed by Saeed Mahameed

parent c3cce0fff3

commit 8d35fb57fd

2 changed files with 57 additions and 34 deletions

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43

drivers/net/ethernet/mellanox/mlx5/core/en/params.c

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48

drivers/net/ethernet/mellanox/mlx5/core/en_rx.c

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