Implement EF10 ESSB Rx datapath callback to get number of pending descriptors.
Signed-off-by: Andrew Rybchenko <[email protected]> Reviewed-by: Ivan Malov <[email protected]> --- drivers/net/sfc/sfc_ef10_essb_rx.c | 27 +++++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-) diff --git a/drivers/net/sfc/sfc_ef10_essb_rx.c b/drivers/net/sfc/sfc_ef10_essb_rx.c index dcb5cb24c..257e40db1 100644 --- a/drivers/net/sfc/sfc_ef10_essb_rx.c +++ b/drivers/net/sfc/sfc_ef10_essb_rx.c @@ -404,13 +404,28 @@ sfc_ef10_essb_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, static sfc_dp_rx_qdesc_npending_t sfc_ef10_essb_rx_qdesc_npending; static unsigned int -sfc_ef10_essb_rx_qdesc_npending(__rte_unused struct sfc_dp_rxq *dp_rxq) +sfc_ef10_essb_rx_qdesc_npending(struct sfc_dp_rxq *dp_rxq) { - /* - * Correct implementation requires EvQ polling and events - * processing. - */ - return -ENOTSUP; + struct sfc_ef10_essb_rxq *rxq = sfc_ef10_essb_rxq_by_dp_rxq(dp_rxq); + const unsigned int evq_old_read_ptr = rxq->evq_read_ptr; + efx_qword_t rx_ev; + + if (unlikely(rxq->flags & (SFC_EF10_ESSB_RXQ_NOT_RUNNING | + SFC_EF10_ESSB_RXQ_EXCEPTION))) + return rxq->bufs_pending; + + while (sfc_ef10_essb_rx_event_get(rxq, &rx_ev)) { + /* + * DROP_EVENT is an internal to the NIC, software should + * never see it and, therefore, may ignore it. + */ + sfc_ef10_essb_rx_process_ev(rxq, rx_ev); + } + + sfc_ef10_ev_qclear(rxq->evq_hw_ring, rxq->evq_ptr_mask, + evq_old_read_ptr, rxq->evq_read_ptr); + + return rxq->bufs_pending; } static sfc_dp_rx_qdesc_status_t sfc_ef10_essb_rx_qdesc_status; -- 2.17.1
