net/mlx5e: Set ECN for received packets using CQE indication

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In multi-host (MH) NIC scheme, a single HW port serves multiple hosts
or sockets on the same host.
The HW uses a mechanism in the PCIe buffer which monitors
the amount of consumed PCIe buffers per host.
On a certain configuration, under congestion,
the HW emulates a switch doing ECN marking on packets using ECN
indication on the completion descriptor (CQE).

The driver needs to set the ECN bits on the packet SKB,
such that the network stack can react on that, this commit does that.

Signed-off-by: Natali Shechtman <natali@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

...

This commit is contained in:

Natali Shechtman 2018-03-20 17:15:31 +02:00 • committed by Saeed Mahameed

parent 64109f1dc4

commit f007c13d4a

3 changed files with 35 additions and 5 deletions

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35

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

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3

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

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2

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

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