[dpdk-dev] [PATCH] net/enic: add support for Rx queue count function
Nelson Escobar
neescoba at cisco.com
Mon Sep 19 20:50:29 CEST 2016
Add support to enic for rte_eth_rx_queue_count().
Signed-off-by: Nelson Escobar <neescoba at cisco.com>
Reviewed-by: John Daley <johndale at cisco.com>
---
drivers/net/enic/enic_ethdev.c | 31 ++++++++++++++++++++++++++++++-
1 file changed, 30 insertions(+), 1 deletion(-)
diff --git a/drivers/net/enic/enic_ethdev.c b/drivers/net/enic/enic_ethdev.c
index 44105d6..d20637f 100644
--- a/drivers/net/enic/enic_ethdev.c
+++ b/drivers/net/enic/enic_ethdev.c
@@ -260,6 +260,35 @@ static void enicpmd_dev_rx_queue_release(void *rxq)
enic_free_rq(rxq);
}
+static uint32_t enicpmd_dev_rx_queue_count(struct rte_eth_dev *dev,
+ uint16_t rx_queue_id)
+{
+ struct enic *enic = pmd_priv(dev);
+ uint32_t queue_count = 0;
+ struct vnic_cq *cq;
+ uint32_t cq_tail;
+ uint16_t cq_idx;
+ int rq_num;
+
+ if (rx_queue_id >= dev->data->nb_rx_queues) {
+ dev_err(enic, "Invalid RX queue id=%d", rx_queue_id);
+ return 0;
+ }
+
+ rq_num = enic_sop_rq(rx_queue_id);
+ cq = &enic->cq[enic_cq_rq(enic, rq_num)];
+ cq_idx = cq->to_clean;
+
+ cq_tail = ioread32(&cq->ctrl->cq_tail);
+
+ if (cq_tail < cq_idx)
+ cq_tail += cq->ring.desc_count;
+
+ queue_count = cq_tail - cq_idx;
+
+ return queue_count;
+}
+
static int enicpmd_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
uint16_t queue_idx,
uint16_t nb_desc,
@@ -560,7 +589,7 @@ static const struct eth_dev_ops enicpmd_eth_dev_ops = {
.tx_queue_stop = enicpmd_dev_tx_queue_stop,
.rx_queue_setup = enicpmd_dev_rx_queue_setup,
.rx_queue_release = enicpmd_dev_rx_queue_release,
- .rx_queue_count = NULL,
+ .rx_queue_count = enicpmd_dev_rx_queue_count,
.rx_descriptor_done = NULL,
.tx_queue_setup = enicpmd_dev_tx_queue_setup,
.tx_queue_release = enicpmd_dev_tx_queue_release,
--
2.7.0
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