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Message-ID: <CALzJLG8sa03Qh5yg+OP1p12po1eWxF6FMYqdcoFLYfK_MnwnZA@mail.gmail.com>
Date:   Tue, 10 Jul 2018 15:26:28 -0700
From:   Saeed Mahameed <saeedm@....mellanox.co.il>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        RDMA mailing list <linux-rdma@...r.kernel.org>,
        Yishai Hadas <yishaih@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        linux-netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH mlx5-next 2/9] net/mlx5: Add support for flow table
 destination number

On Sun, Jul 8, 2018 at 3:24 AM, Leon Romanovsky <leon@...nel.org> wrote:
> From: Yishai Hadas <yishaih@...lanox.com>
>
> Add support to set a destination from a flow table number.
> This functionality will be used in downstream patches from this
> series by the DEVX stuff.
>
> Signed-off-by: Yishai Hadas <yishaih@...lanox.com>
> Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
> ---
>  .../mellanox/mlx5/core/diag/fs_tracepoint.c         |  3 +++
>  drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c    | 21 ++++++++++++++-------
>  drivers/net/ethernet/mellanox/mlx5/core/fs_core.c   |  4 +++-
>  include/linux/mlx5/fs.h                             |  1 +
>  include/linux/mlx5/mlx5_ifc.h                       |  1 +
>  5 files changed, 22 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/fs_tracepoint.c b/drivers/net/ethernet/mellanox/mlx5/core/diag/fs_tracepoint.c
> index b3820a34e773..0f11fff32a9b 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/diag/fs_tracepoint.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/fs_tracepoint.c
> @@ -240,6 +240,9 @@ const char *parse_fs_dst(struct trace_seq *p,
>         case MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE:
>                 trace_seq_printf(p, "ft=%p\n", dst->ft);
>                 break;
> +       case MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE_NUM:
> +               trace_seq_printf(p, "ft_num=%u\n", dst->ft_num);
> +               break;
>         case MLX5_FLOW_DESTINATION_TYPE_TIR:
>                 trace_seq_printf(p, "tir=%u\n", dst->tir_num);
>                 break;
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
> index 5a00deff5457..a98584576c2e 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
> @@ -363,17 +363,21 @@ static int mlx5_cmd_set_fte(struct mlx5_core_dev *dev,
>
>                 list_for_each_entry(dst, &fte->node.children, node.list) {
>                         unsigned int id;
> +                       unsigned int type;
>

reversed xmas tree, preferably just do:

    unsigned int id, type = dst->dest_attr.type;

    // use type directly instead of dst->dest_attr.type below ..


>                         if (dst->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_COUNTER)
>                                 continue;
>
> -                       MLX5_SET(dest_format_struct, in_dests, destination_type,
> -                                dst->dest_attr.type);
> -                       if (dst->dest_attr.type ==
> -                           MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE) {
> +                       type = dst->dest_attr.type;
> +                       switch (type) {
> +                       case MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE_NUM:
> +                               id = dst->dest_attr.ft_num;
> +                               type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
> +                               break;
> +                       case MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE:
>                                 id = dst->dest_attr.ft->id;
> -                       } else if (dst->dest_attr.type ==
> -                                  MLX5_FLOW_DESTINATION_TYPE_VPORT) {
> +                               break;
> +                       case MLX5_FLOW_DESTINATION_TYPE_VPORT:
>                                 id = dst->dest_attr.vport.num;
>                                 MLX5_SET(dest_format_struct, in_dests,
>                                          destination_eswitch_owner_vhca_id_valid,
> @@ -381,9 +385,12 @@ static int mlx5_cmd_set_fte(struct mlx5_core_dev *dev,
>                                 MLX5_SET(dest_format_struct, in_dests,
>                                          destination_eswitch_owner_vhca_id,
>                                          dst->dest_attr.vport.vhca_id);
> -                       } else {
> +                               break;
> +                       default:
>                                 id = dst->dest_attr.tir_num;
>                         }
> +
> +                       MLX5_SET(dest_format_struct, in_dests, destination_type, type);
>                         MLX5_SET(dest_format_struct, in_dests, destination_id, id);
>                         in_dests += MLX5_ST_SZ_BYTES(dest_format_struct);
>                         list_size++;
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
> index eba113cf1117..69aa298a0b1c 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
> @@ -1356,7 +1356,9 @@ static bool mlx5_flow_dests_cmp(struct mlx5_flow_destination *d1,
>                     (d1->type == MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE &&
>                      d1->ft == d2->ft) ||
>                     (d1->type == MLX5_FLOW_DESTINATION_TYPE_TIR &&
> -                    d1->tir_num == d2->tir_num))
> +                    d1->tir_num == d2->tir_num) ||
> +                   (d1->type == MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE_NUM &&
> +                    d1->ft_num == d2->ft_num))
>                         return true;
>         }
>
> diff --git a/include/linux/mlx5/fs.h b/include/linux/mlx5/fs.h
> index 757b4a30281e..a45febcf6b51 100644
> --- a/include/linux/mlx5/fs.h
> +++ b/include/linux/mlx5/fs.h
> @@ -89,6 +89,7 @@ struct mlx5_flow_destination {
>         enum mlx5_flow_destination_type type;
>         union {
>                 u32                     tir_num;
> +               u32                     ft_num;
>                 struct mlx5_flow_table  *ft;
>                 struct mlx5_fc          *counter;
>                 struct {
> diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
> index 44a6ce01c3bb..fb89cc519703 100644
> --- a/include/linux/mlx5/mlx5_ifc.h
> +++ b/include/linux/mlx5/mlx5_ifc.h
> @@ -1181,6 +1181,7 @@ enum mlx5_flow_destination_type {
>
>         MLX5_FLOW_DESTINATION_TYPE_PORT         = 0x99,
>         MLX5_FLOW_DESTINATION_TYPE_COUNTER      = 0x100,
> +       MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE_NUM = 0x101,
>  };
>
>  struct mlx5_ifc_dest_format_struct_bits {
> --
> 2.14.4
>

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