[dpdk-dev] [PATCH v2 15/19] net/bnxt: add support for rx_descriptor_status

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

add support for rx_descriptor_status dev_op
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
--
v1->v2: incorporate review comments.
---
 doc/guides/nics/features/bnxt.ini |  1 +
 drivers/net/bnxt/bnxt_ethdev.c    | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/doc/guides/nics/features/bnxt.ini b/doc/guides/nics/features/bnxt.ini
index 119132e..e0af1df 100644
--- a/doc/guides/nics/features/bnxt.ini
+++ b/doc/guides/nics/features/bnxt.ini
@@ -21,6 +21,7 @@ Basic stats          = Y
 Extended stats       = Y
 FW version           = Y
 LED                  = Y
+Rx descriptor status = Y
 Linux UIO            = Y
 Linux VFIO           = Y
 x86-64               = Y
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index b2272c2..140db0e 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -1567,6 +1567,44 @@ bnxt_rx_queue_count_op(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 	return desc;
 }
 
+static int
+bnxt_rx_descriptor_status_op(void *rx_queue, uint16_t offset)
+{
+	struct bnxt_rx_queue *rxq = (struct bnxt_rx_queue *)rx_queue;
+	struct bnxt_rx_ring_info *rxr;
+	struct bnxt_cp_ring_info *cpr;
+	struct bnxt_sw_rx_bd *rx_buf;
+	struct rx_pkt_cmpl *rxcmp;
+	uint32_t cons, cp_cons;
+
+	if (!rxq)
+		return -EINVAL;
+
+	cpr = rxq->cp_ring;
+	rxr = rxq->rx_ring;
+
+	if (offset >= rxq->nb_rx_desc)
+		return -EINVAL;
+
+	cons = RING_CMP(cpr->cp_ring_struct, offset);
+	cp_cons = cpr->cp_raw_cons;
+	rxcmp = (struct rx_pkt_cmpl *)&cpr->cp_desc_ring[cons];
+
+	if (cons > cp_cons) {
+		if (CMPL_VALID(rxcmp, cpr->valid))
+			return RTE_ETH_RX_DESC_DONE;
+	} else {
+		if (CMPL_VALID(rxcmp, !cpr->valid))
+			return RTE_ETH_RX_DESC_DONE;
+	}
+	rx_buf = &rxr->rx_buf_ring[cons];
+	if (rx_buf->mbuf == NULL)
+		return RTE_ETH_RX_DESC_UNAVAIL;
+
+
+	return RTE_ETH_RX_DESC_AVAIL;
+}
+
 /*
  * Initialization
  */
@@ -1617,6 +1655,7 @@ static const struct eth_dev_ops bnxt_dev_ops = {
 	.xstats_get_by_id = bnxt_dev_xstats_get_by_id_op,
 	.xstats_get_names_by_id = bnxt_dev_xstats_get_names_by_id_op,
 	.rx_queue_count = bnxt_rx_queue_count_op,
+	.rx_descriptor_status = bnxt_rx_descriptor_status_op,
 };
 
 static bool bnxt_vf_pciid(uint16_t id)
-- 
2.10.1 (Apple Git-78)