mlx5: basic XDP_REDIRECT forward support

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This implements basic XDP redirect support in mlx5 driver.

Notice that the ndo_xdp_xmit() is NOT implemented, because that API
need some changes that this patchset is working towards.

The main purpose of this patch is have different drivers doing
XDP_REDIRECT to show how different memory models behave in a cross
driver world.

Update(pre-RFCv2 Tariq): Need to DMA unmap page before xdp_do_redirect,
as the return API does not exist yet to to keep this mapped.

Update(pre-RFCv3 Saeed): Don't mix XDP_TX and XDP_REDIRECT flushing,
introduce xdpsq.db.redirect_flush boolian.

V9: Adjust for commit 121e892754 ("net/mlx5e: Refactor RQ XDP_TX indication")

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Jesper Dangaard Brouer 2018-04-17 16:45:21 +02:00 • committed by David S. Miller

parent 897ddc2483

commit 5168d73201

2 changed files with 25 additions and 3 deletions

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1

drivers/net/ethernet/mellanox/mlx5/core/en.h

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27

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

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