ACK: [PATCH][Jammy] IB/mlx5: Expose NDR speed through MAD

[Tim Gardner]

Acked-by: Tim Gardner <tim.gardner at canonical.com>

On 2/24/22 09:09, dann frazier wrote:
> From: Maher Sanalla <msanalla at nvidia.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1962185
> 
> Under MAD query port, Report NDR speed when NDR is supported in the port
> capability mask.
> 
> Link: https://lore.kernel.org/r/a2ab630d2a634547db9b581faa9d65da2edb9d05.1639554831.git.leonro@nvidia.com
> Signed-off-by: Maher Sanalla <msanalla at nvidia.com>
> Reviewed-by: Michael Guralnik <michaelgur at nvidia.com>
> Signed-off-by: Leon Romanovsky <leonro at nvidia.com>
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>
> (cherry picked from commit fbdb0ba7051e9b0881708c1c7bb491363cb7e486)
> Signed-off-by: dann frazier <dann.frazier at canonical.com>
> ---
> 
> Recognized speeds exposed in upcoming hardware products.
> 
>   drivers/infiniband/hw/mlx5/mad.c | 5 +++++
>   include/rdma/ib_mad.h            | 1 +
>   2 files changed, 6 insertions(+)
> 
> diff --git a/drivers/infiniband/hw/mlx5/mad.c b/drivers/infiniband/hw/mlx5/mad.c
> index ec242a5a17a3..29a888b22789 100644
> --- a/drivers/infiniband/hw/mlx5/mad.c
> +++ b/drivers/infiniband/hw/mlx5/mad.c
> @@ -584,6 +584,11 @@ int mlx5_query_mad_ifc_port(struct ib_device *ibdev, u32 port,
>   			    props->port_cap_flags2 & IB_PORT_LINK_SPEED_HDR_SUP)
>   				props->active_speed = IB_SPEED_HDR;
>   			break;
> +		case 8:
> +			if (props->port_cap_flags & IB_PORT_CAP_MASK2_SUP &&
> +			    props->port_cap_flags2 & IB_PORT_LINK_SPEED_NDR_SUP)
> +				props->active_speed = IB_SPEED_NDR;
> +			break;
>   		}
>   	}
>   
> diff --git a/include/rdma/ib_mad.h b/include/rdma/ib_mad.h
> index 465b0d0bdaf8..2e3843b761e8 100644
> --- a/include/rdma/ib_mad.h
> +++ b/include/rdma/ib_mad.h
> @@ -276,6 +276,7 @@ enum ib_port_capability_mask2_bits {
>   	IB_PORT_SWITCH_PORT_STATE_TABLE_SUP	= 1 << 3,
>   	IB_PORT_LINK_WIDTH_2X_SUP		= 1 << 4,
>   	IB_PORT_LINK_SPEED_HDR_SUP		= 1 << 5,
> +	IB_PORT_LINK_SPEED_NDR_SUP		= 1 << 10,
>   };
>   
>   #define OPA_CLASS_PORT_INFO_PR_SUPPORT BIT(26)

-- 
-----------
Tim Gardner
Canonical, Inc