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RDMA/mlx5: Support TX port affinity for VF drivers in LAG mode

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The mlx5 VF driver doesn't set QP tx port affinity because it doesn't know
if the lag is active or not, since the "lag_active" works only for PF
interfaces. In this case for VF interfaces only one lag is used which
brings performance issue.

Add a lag_tx_port_affinity CAP bit; When it is enabled and
"num_lag_ports > 1", then driver always set QP tx affinity, regardless
of lag state.

Link: https://lore.kernel.org/r/20200527055014.355093-1-leon@kernel.org
Signed-off-by: Mark Zhang <markz@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Mark Zhang
2020-05-27 08:50:14 +03:00
committed by Jason Gunthorpe
parent e0cca8b456
commit 802dcc7fc5
3 changed files with 10 additions and 2 deletions
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3
drivers/infiniband/hw/mlx5/qp.c
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@@ -3653,7 +3653,8 @@ static unsigned int get_tx_affinity(struct ib_qp *qp,
struct mlx5_ib_qp_base *qp_base;
unsigned int tx_affinity;
if (!(dev->lag_active && qp_supports_affinity(qp)))
if (!(mlx5_ib_lag_should_assign_affinity(dev) &&
qp_supports_affinity(qp)))
return 0;
if (mqp->flags & MLX5_IB_QP_CREATE_SQPN_QP1)