NAME

       mlx5dv_devx_create_cmd_comp - Create a command completion to be used for DEVX asynchronous commands.

       mlx5dv_devx_destroy_cmd_comp - Destroy a devx command completion.

       mlx5dv_devx_get_async_cmd_comp - Get an asynchronous command completion.  # SYNOPSIS

              #include <infiniband/mlx5dv.h>

              struct mlx5dv_devx_cmd_comp {
                  int fd;
              };

              struct mlx5dv_devx_cmd_comp *
              mlx5dv_devx_create_cmd_comp(struct ibv_context *context)

              void mlx5dv_devx_destroy_cmd_comp(struct mlx5dv_devx_cmd_comp *cmd_comp)

              struct mlx5dv_devx_async_cmd_hdr {
                  uint64_t    wr_id;
                  uint8_t     out_data[];
              };

              int mlx5dv_devx_get_async_cmd_comp(struct mlx5dv_devx_cmd_comp *cmd_comp,
                                 struct mlx5dv_devx_async_cmd_hdr *cmd_resp,
                                 size_t cmd_resp_len)

DESCRIPTION

       Create or destroy a command completion to be used for DEVX asynchronous commands.

       The  create  verb  exposes  an  mlx5dv_devx_cmd_comp object that can be used as part of asynchronous DEVX
       commands.  This lets an application run asynchronously without blocking and once the  response  is  ready
       read it from this object.

       The  response  can  be read by the mlx5dv_devx_get_async_cmd_comp() API, upon response the wr_id that was
       supplied upon the asynchronous command is returned and  the  out_data  includes  the  data  itself.   The
       application  must  supply a large enough buffer to match any command that was issued on the cmd_comp, its
       size is given by the input cmd_resp_len parameter.

ARGUMENTS

       context

              RDMA device context to create the action on.

       cmd_comp
              The command completion object.

       cmd_resp
              The output data from the asynchronous command.

       cmd_resp_len
              The output buffer size to hold the response.

RETURN VALUE

       Upon success mlx5dv_devx_create_cmd_comp will return a new struct mlx5dv_devx_cmd_comp object,  on  error
       NULL will be returned and errno will be set.

       Upon success mlx5dv_devx_get_async_cmd_comp will return 0, otherwise errno will be returned.

SEE ALSO

       mlx5dv_open_device(3), mlx5dv_devx_obj_create(3)

       #AUTHOR

       Yishai Hadas <yishaih@mellanox.com>

                                         mlx5dv_devx_create_cmd_comp, mlx5dv_devx_destroy_cmd_comp, get_async(3)