mlx5dv_dci_stream_id_reset(3) mlx5dv_dci_stream_id_reset(3)
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 er-
rored stream_id by calling mlx5dv_dci_stream_id_reset(). Work request-
ed 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)
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