[1/2] net/sfc: support ops to check ready descriptors in ESSB Rx
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Commit Message
Implement EF10 ESSB Rx datapath callback to get number of pending
descriptors.
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Ivan Malov <ivan.malov@oktetlabs.ru>
---
drivers/net/sfc/sfc_ef10_essb_rx.c | 27 +++++++++++++++++++++------
1 file changed, 21 insertions(+), 6 deletions(-)
Comments
On 6/29/2018 4:41 PM, Andrew Rybchenko wrote:
> Implement EF10 ESSB Rx datapath callback to get number of pending
> descriptors.
>
> Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
> Reviewed-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Series applied to dpdk-next-net/master, thanks.
@@ -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;