net/mlx5e: XDP_TX from UMEM support

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When an XDP program returns XDP_TX, and the RQ is XSK-enabled, it
requires careful handling, because convert_to_xdp_frame creates a new
page and copies the data there, while our driver expects the xdp_frame
to point to the same memory as the xdp_buff. Handle this case
separately: map the page, and in the end unmap it and call
xdp_return_frame.

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Maxim Mikityanskiy 2019-06-26 17:35:34 +03:00 • committed by Daniel Borkmann

parent b9673cf555

commit 84a0a2310d

1 changed files with 42 additions and 8 deletions

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

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