linux-kernel - Re: [PATCH mlx5-next 4/7] net/mlx5: Introduce migration bits and structures

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Date:   Fri, 24 Sep 2021 13:48:27 +0800
From:   Mark Zhang <markzhang@...dia.com>
To:     Leon Romanovsky <leon@...nel.org>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>
CC:     Yishai Hadas <yishaih@...dia.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "Jakub Kicinski" <kuba@...nel.org>,
        Kirti Wankhede <kwankhede@...dia.com>, <kvm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
        <linux-rdma@...r.kernel.org>, <netdev@...r.kernel.org>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: Re: [PATCH mlx5-next 4/7] net/mlx5: Introduce migration bits and
 structures

On 9/22/2021 6:38 PM, Leon Romanovsky wrote:
> From: Yishai Hadas <yishaih@...dia.com>
> 
> Introduce migration IFC related stuff to enable migration commands.
> 
> Signed-off-by: Yishai Hadas <yishaih@...dia.com>
> Signed-off-by: Leon Romanovsky <leonro@...dia.com>
> ---
>   include/linux/mlx5/mlx5_ifc.h | 145 +++++++++++++++++++++++++++++++++-
>   1 file changed, 144 insertions(+), 1 deletion(-)
> 
> diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
> index d90a65b6824f..366c7b030eb7 100644
> --- a/include/linux/mlx5/mlx5_ifc.h
> +++ b/include/linux/mlx5/mlx5_ifc.h
> @@ -126,6 +126,11 @@ enum {
>   	MLX5_CMD_OP_QUERY_SF_PARTITION            = 0x111,
>   	MLX5_CMD_OP_ALLOC_SF                      = 0x113,
>   	MLX5_CMD_OP_DEALLOC_SF                    = 0x114,
> +	MLX5_CMD_OP_SUSPEND_VHCA                  = 0x115,
> +	MLX5_CMD_OP_RESUME_VHCA                   = 0x116,
> +	MLX5_CMD_OP_QUERY_VHCA_MIGRATION_STATE    = 0x117,
> +	MLX5_CMD_OP_SAVE_VHCA_STATE               = 0x118,
> +	MLX5_CMD_OP_LOAD_VHCA_STATE               = 0x119,
>   	MLX5_CMD_OP_CREATE_MKEY                   = 0x200,
>   	MLX5_CMD_OP_QUERY_MKEY                    = 0x201,
>   	MLX5_CMD_OP_DESTROY_MKEY                  = 0x202,
> @@ -1719,7 +1724,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
>   	u8         reserved_at_682[0x1];
>   	u8         log_max_sf[0x5];
>   	u8         apu[0x1];
> -	u8         reserved_at_689[0x7];
> +	u8         reserved_at_689[0x4];
> +	u8         migration[0x1];
> +	u8         reserved_at_68d[0x2];

Should it be "reserved_at_68e[0x2]"?

>   	u8         log_min_sf_size[0x8];
>   	u8         max_num_sf_partitions[0x8];
>