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net/sfc: support ops to check ready descriptors in ESSB Rx

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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>
This commit is contained in:
Andrew Rybchenko 2018-06-29 16:41:30 +01:00 committed by Ferruh Yigit
parent 20680dae46
commit 6e98e4d230
1 changed files with 21 additions and 6 deletions
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27
drivers/net/sfc/sfc_ef10_essb_rx.c
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@ -411,13 +411,28 @@ 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;