net/sfc: get RxQ pending descriptors count

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andrew Lee <alee@solarflare.com>
Reviewed-by: Robert Stonehouse <rstonehouse@solarflare.com>

diff --git a/drivers/net/sfc/sfc_ethdev.c b/drivers/net/sfc/sfc_ethdev.c
index 226ff16..ad6f813 100644 (file)
--- a/drivers/net/sfc/sfc_ethdev.c
+++ b/drivers/net/sfc/sfc_ethdev.c
@@ -844,6 +844,16 @@ sfc_rx_queue_info_get(struct rte_eth_dev *dev, uint16_t rx_queue_id,
        sfc_adapter_unlock(sa);
 }
 
+static uint32_t
+sfc_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
+{
+       struct sfc_adapter *sa = dev->data->dev_private;
+
+       sfc_log_init(sa, "RxQ=%u", rx_queue_id);
+
+       return sfc_rx_qdesc_npending(sa, rx_queue_id);
+}
+
 static const struct eth_dev_ops sfc_eth_dev_ops = {
        .dev_configure                  = sfc_dev_configure,
        .dev_start                      = sfc_dev_start,
@@ -864,6 +874,7 @@ static const struct eth_dev_ops sfc_eth_dev_ops = {
        .mtu_set                        = sfc_dev_set_mtu,
        .rx_queue_setup                 = sfc_rx_queue_setup,
        .rx_queue_release               = sfc_rx_queue_release,
+       .rx_queue_count                 = sfc_rx_queue_count,
        .tx_queue_setup                 = sfc_tx_queue_setup,
        .tx_queue_release               = sfc_tx_queue_release,
        .flow_ctrl_get                  = sfc_flow_ctrl_get,

diff --git a/drivers/net/sfc/sfc_rx.c b/drivers/net/sfc/sfc_rx.c
index 278d583..ff9d799 100644 (file)
--- a/drivers/net/sfc/sfc_rx.c
+++ b/drivers/net/sfc/sfc_rx.c
@@ -257,6 +257,22 @@ discard:
        return done_pkts;
 }
 
+unsigned int
+sfc_rx_qdesc_npending(struct sfc_adapter *sa, unsigned int sw_index)
+{
+       struct sfc_rxq *rxq;
+
+       SFC_ASSERT(sw_index < sa->rxq_count);
+       rxq = sa->rxq_info[sw_index].rxq;
+
+       if (rxq == NULL || (rxq->state & SFC_RXQ_RUNNING) == 0)
+               return 0;
+
+       sfc_ev_qpoll(rxq->evq);
+
+       return rxq->pending - rxq->completed;
+}
+
 static void
 sfc_rx_qpurge(struct sfc_rxq *rxq)
 {

diff --git a/drivers/net/sfc/sfc_rx.h b/drivers/net/sfc/sfc_rx.h
index 69318ab..8064af6 100644 (file)
--- a/drivers/net/sfc/sfc_rx.h
+++ b/drivers/net/sfc/sfc_rx.h
@@ -140,6 +140,9 @@ void sfc_rx_qflush_failed(struct sfc_rxq *rxq);
 uint16_t sfc_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
                       uint16_t nb_pkts);
 
+unsigned int sfc_rx_qdesc_npending(struct sfc_adapter *sa,
+                                  unsigned int sw_index);
+
 #ifdef __cplusplus
 }
 #endif