NAME

       mlx5dv_dci_stream_id_reset - Reset stream_id of a given DCI QP

SYNOPSIS

              #include <infiniband/mlx5dv.h>

              int mlx5dv_dci_stream_id_reset(struct ibv_qp *qp, uint16_t stream_id);

DESCRIPTION

       Used by SW to reset an errored stream_id in the HW DCI context.

       On work completion with error, the application should call ibv_query_qp() to check if the QP was moved to
       an  error  state,  or it’s still operational (in RTS state), which means that the specific stream_id that
       caused the completion with error is in error state.

       Errors which are stream related will cause only that stream_id’s work request to be flushed as  they  are
       handled  in  order  in the send queue.  Once all stream_id WR’s are flushed, application should reset the
       errored stream_id by calling mlx5dv_dci_stream_id_reset().  Work requested  for  other  stream_id’s  will
       continue  to  be processed by the QP.  The DCI QP will move to an error state and stop operating once the
       number of unique stream_id in error reaches the DCI QP’s `log_num_errored' streams defined by SW.

       Application should use the `wr_id' in the ibv_wc to find the stream_id from it’s private context.

ARGUMENTS

       qp     The ibv_qp object to issue the action on.

       stream_id
              The DCI stream channel id that need to be reset.

RETURN VALUE

       Returns 0 on success, or the value of errno on failure (which indicates the failure reason).

AUTHOR

       Lior Nahmanson liorna@nvidia.com

                                                                                   mlx5dv_dci_stream_id_reset(3)