[PATCH rdma-rc] IB/mlx5: Add support for 400G_8X lane speed

[PATCH rdma-rc] IB/mlx5: Add support for 400G_8X lane speed

[Leon Romanovsky]

From: Maher Sanalla <msanalla@nvidia.com>

Currently, when driver queries PTYS to report which link speed is being
used on its RoCE ports, it does not check the case of having 400Gbps
transmitted over 8 lanes. Thus it fails to report the said speed and
instead it defaults to report 10G over 4 lanes.

Add a check for the said speed when querying PTYS and report it back
correctly when needed.

Fixes: 08e8676f1607 ("IB/mlx5: Add support for 50Gbps per lane link modes")
Signed-off-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 drivers/infiniband/hw/mlx5/main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 5e5ed1c8299d..f0b394ed7452 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -442,6 +442,10 @@ static int translate_eth_ext_proto_oper(u32 eth_proto_oper, u16 *active_speed,
 		*active_width = IB_WIDTH_2X;
 		*active_speed = IB_SPEED_NDR;
 		break;
+	case MLX5E_PROT_MASK(MLX5E_400GAUI_8):
+		*active_width = IB_WIDTH_8X;
+		*active_speed = IB_SPEED_HDR;
+		break;
 	case MLX5E_PROT_MASK(MLX5E_400GAUI_4_400GBASE_CR4_KR4):
 		*active_width = IB_WIDTH_4X;
 		*active_speed = IB_SPEED_NDR;
-- 
2.39.2

Re: [PATCH rdma-rc] IB/mlx5: Add support for 400G_8X lane speed

[Leon Romanovsky]

On Thu, 16 Mar 2023 15:40:49 +0200, Leon Romanovsky wrote:
> Currently, when driver queries PTYS to report which link speed is being
> used on its RoCE ports, it does not check the case of having 400Gbps
> transmitted over 8 lanes. Thus it fails to report the said speed and
> instead it defaults to report 10G over 4 lanes.
> 
> Add a check for the said speed when querying PTYS and report it back
> correctly when needed.
> 
> [...]

Applied, thanks!

[1/1] IB/mlx5: Add support for 400G_8X lane speed
      https://git.kernel.org/rdma/rdma/c/88c9483faf15ad

Best regards,
-- 
Leon Romanovsky <leon@kernel.org>