netdev - Re: [PATCH mlx5-next v1 1/3] IB/mlx5: Query ODP capabilities for DC

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Date:   Mon, 5 Aug 2019 18:23:04 +0000
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     Jason Gunthorpe <jgg@...lanox.com>,
        "leon@...nel.org" <leon@...nel.org>,
        "dledford@...hat.com" <dledford@...hat.com>
CC:     Michael Guralnik <michaelgur@...lanox.com>,
        Moni Shoua <monis@...lanox.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Leon Romanovsky <leonro@...lanox.com>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>
Subject: Re: [PATCH mlx5-next v1 1/3] IB/mlx5: Query ODP capabilities for DC

On Sun, 2019-08-04 at 13:00 +0300, Leon Romanovsky wrote:
> From: Michael Guralnik <michaelgur@...lanox.com>
> 
> Set current capabilities of ODP for DC to max capabilities and cache
> them in mlx5_ib.
> 
> Signed-off-by: Michael Guralnik <michaelgur@...lanox.com>
> Reviewed-by: Moni Shoua <monis@...lanox.com>
> Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
> ---
>  drivers/infiniband/hw/mlx5/mlx5_ib.h           |  1 +
>  drivers/infiniband/hw/mlx5/odp.c               | 18 
> ++++++++++++++++++
>  drivers/net/ethernet/mellanox/mlx5/core/main.c |  6 ++++++
>  include/linux/mlx5/mlx5_ifc.h                  |  4 +++-

Please avoid cross tree changes when you can.. 
Here you do can avoid it, so please separate to two stage patches,
mlx5_ifc and core, then mlx5_ib.


>  4 files changed, 28 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h
> b/drivers/infiniband/hw/mlx5/mlx5_ib.h
> index cb41a7e6255a..f99c71b3c876 100644
> --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
> +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
> @@ -967,6 +967,7 @@ struct mlx5_ib_dev {
>  	struct mutex			slow_path_mutex;
>  	int				fill_delay;
>  	struct ib_odp_caps	odp_caps;
> +	uint32_t		dc_odp_caps;
>  	u64			odp_max_size;
>  	struct mlx5_ib_pf_eq	odp_pf_eq;
>  
> diff --git a/drivers/infiniband/hw/mlx5/odp.c
> b/drivers/infiniband/hw/mlx5/odp.c
> index b0c5de39d186..5e87a5e25574 100644
> --- a/drivers/infiniband/hw/mlx5/odp.c
> +++ b/drivers/infiniband/hw/mlx5/odp.c
> @@ -353,6 +353,24 @@ void mlx5_ib_internal_fill_odp_caps(struct
> mlx5_ib_dev *dev)
>  	if (MLX5_CAP_ODP(dev->mdev, xrc_odp_caps.srq_receive))
>  		caps->per_transport_caps.xrc_odp_caps |=
> IB_ODP_SUPPORT_SRQ_RECV;
>  
> +	if (MLX5_CAP_ODP(dev->mdev, dc_odp_caps.send))
> +		dev->dc_odp_caps |= IB_ODP_SUPPORT_SEND;
> +
> +	if (MLX5_CAP_ODP(dev->mdev, dc_odp_caps.receive))
> +		dev->dc_odp_caps |= IB_ODP_SUPPORT_RECV;
> +
> +	if (MLX5_CAP_ODP(dev->mdev, dc_odp_caps.write))
> +		dev->dc_odp_caps |= IB_ODP_SUPPORT_WRITE;
> +
> +	if (MLX5_CAP_ODP(dev->mdev, dc_odp_caps.read))
> +		dev->dc_odp_caps |= IB_ODP_SUPPORT_READ;
> +
> +	if (MLX5_CAP_ODP(dev->mdev, dc_odp_caps.atomic))
> +		dev->dc_odp_caps |= IB_ODP_SUPPORT_ATOMIC;
> +
> +	if (MLX5_CAP_ODP(dev->mdev, dc_odp_caps.srq_receive))
> +		dev->dc_odp_caps |= IB_ODP_SUPPORT_SRQ_RECV;
> +
>  	if (MLX5_CAP_GEN(dev->mdev, fixed_buffer_size) &&
>  	    MLX5_CAP_GEN(dev->mdev, null_mkey) &&
>  	    MLX5_CAP_GEN(dev->mdev, umr_extended_translation_offset))
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c
> b/drivers/net/ethernet/mellanox/mlx5/core/main.c
> index b15b27a497fc..3995fc6d4d34 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
> @@ -495,6 +495,12 @@ static int handle_hca_cap_odp(struct
> mlx5_core_dev *dev)
>  	ODP_CAP_SET_MAX(dev, xrc_odp_caps.write);
>  	ODP_CAP_SET_MAX(dev, xrc_odp_caps.read);
>  	ODP_CAP_SET_MAX(dev, xrc_odp_caps.atomic);
> +	ODP_CAP_SET_MAX(dev, dc_odp_caps.srq_receive);
> +	ODP_CAP_SET_MAX(dev, dc_odp_caps.send);
> +	ODP_CAP_SET_MAX(dev, dc_odp_caps.receive);
> +	ODP_CAP_SET_MAX(dev, dc_odp_caps.write);
> +	ODP_CAP_SET_MAX(dev, dc_odp_caps.read);
> +	ODP_CAP_SET_MAX(dev, dc_odp_caps.atomic);
>  
>  	if (do_set)
>  		err = set_caps(dev, set_ctx, set_sz,
> diff --git a/include/linux/mlx5/mlx5_ifc.h
> b/include/linux/mlx5/mlx5_ifc.h
> index ec571fd7fcf8..5eae8d734435 100644
> --- a/include/linux/mlx5/mlx5_ifc.h
> +++ b/include/linux/mlx5/mlx5_ifc.h
> @@ -944,7 +944,9 @@ struct mlx5_ifc_odp_cap_bits {
>  
>  	struct mlx5_ifc_odp_per_transport_service_cap_bits
> xrc_odp_caps;
>  
> -	u8         reserved_at_100[0x700];
> +	struct mlx5_ifc_odp_per_transport_service_cap_bits dc_odp_caps;
> +
> +	u8         reserved_at_100[0x6E0];

reserved_at_100 should move 20 bit forward. i.e reserved_at_120