[dpdk-dev] [PATCH v3] net/octeontx2: add tx desc status dev ops

[kirankumark at marvell.com]

From: Kiran Kumar K <kirankumark at marvell.com>

Adding support for tx descriptor status dev ops for octeontx2.

Signed-off-by: Kiran Kumar K <kirankumark at marvell.com>
---
V3 Changes:
* Added version info in subject

V2 Changes:
* Fixed check for num of tx desc

 doc/guides/nics/features/octeontx2.ini  |  1 +
 drivers/net/octeontx2/otx2_ethdev.c     |  1 +
 drivers/net/octeontx2/otx2_ethdev.h     |  1 +
 drivers/net/octeontx2/otx2_ethdev_ops.c | 38 ++++++++++++++++++++++++-
 4 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/doc/guides/nics/features/octeontx2.ini b/doc/guides/nics/features/octeontx2.ini
index 66952328b..b89959994 100644
--- a/doc/guides/nics/features/octeontx2.ini
+++ b/doc/guides/nics/features/octeontx2.ini
@@ -39,6 +39,7 @@ Packet type parsing  = Y
 Timesync             = Y
 Timestamp offload    = Y
 Rx descriptor status = Y
+Tx descriptor status = Y
 Basic stats          = Y
 Stats per queue      = Y
 Extended stats       = Y
diff --git a/drivers/net/octeontx2/otx2_ethdev.c b/drivers/net/octeontx2/otx2_ethdev.c
index b84128fef..696c85cb8 100644
--- a/drivers/net/octeontx2/otx2_ethdev.c
+++ b/drivers/net/octeontx2/otx2_ethdev.c
@@ -1646,6 +1646,7 @@ static const struct eth_dev_ops otx2_eth_dev_ops = {
 	.rx_queue_count           = otx2_nix_rx_queue_count,
 	.rx_descriptor_done       = otx2_nix_rx_descriptor_done,
 	.rx_descriptor_status     = otx2_nix_rx_descriptor_status,
+	.tx_descriptor_status     = otx2_nix_tx_descriptor_status,
 	.tx_done_cleanup          = otx2_nix_tx_done_cleanup,
 	.pool_ops_supported       = otx2_nix_pool_ops_supported,
 	.filter_ctrl              = otx2_nix_dev_filter_ctrl,
diff --git a/drivers/net/octeontx2/otx2_ethdev.h b/drivers/net/octeontx2/otx2_ethdev.h
index 7b15d6bc8..1c660cb1e 100644
--- a/drivers/net/octeontx2/otx2_ethdev.h
+++ b/drivers/net/octeontx2/otx2_ethdev.h
@@ -377,6 +377,7 @@ uint32_t otx2_nix_rx_queue_count(struct rte_eth_dev *eth_dev, uint16_t qidx);
 int otx2_nix_tx_done_cleanup(void *txq, uint32_t free_cnt);
 int otx2_nix_rx_descriptor_done(void *rxq, uint16_t offset);
 int otx2_nix_rx_descriptor_status(void *rx_queue, uint16_t offset);
+int otx2_nix_tx_descriptor_status(void *tx_queue, uint16_t offset);

 void otx2_nix_promisc_config(struct rte_eth_dev *eth_dev, int en);
 void otx2_nix_promisc_enable(struct rte_eth_dev *eth_dev);
diff --git a/drivers/net/octeontx2/otx2_ethdev_ops.c b/drivers/net/octeontx2/otx2_ethdev_ops.c
index 7c6532b6f..ab07e4bc0 100644
--- a/drivers/net/octeontx2/otx2_ethdev_ops.c
+++ b/drivers/net/octeontx2/otx2_ethdev_ops.c
@@ -274,7 +274,7 @@ otx2_nix_rx_descriptor_status(void *rx_queue, uint16_t offset)
 	struct otx2_eth_rxq *rxq = rx_queue;
 	uint32_t head, tail;

-	if (rxq->qlen >= offset)
+	if (rxq->qlen <= offset)
 		return -EINVAL;

 	nix_rx_head_tail_get(otx2_eth_pmd_priv(rxq->eth_dev),
@@ -286,6 +286,42 @@ otx2_nix_rx_descriptor_status(void *rx_queue, uint16_t offset)
 		return RTE_ETH_RX_DESC_AVAIL;
 }

+static void
+nix_tx_head_tail_get(struct otx2_eth_dev *dev,
+		     uint32_t *head, uint32_t *tail, uint16_t queue_idx)
+{
+	uint64_t reg, val;
+
+	if (head == NULL || tail == NULL)
+		return;
+
+	reg = (((uint64_t)queue_idx) << 32);
+	val = otx2_atomic64_add_nosync(reg, (int64_t *)
+				       (dev->base + NIX_LF_SQ_OP_STATUS));
+	if (val & OP_ERR)
+		val = 0;
+
+	*tail = (uint32_t)((val >> 28) & 0x3F);
+	*head = (uint32_t)((val >> 20) & 0x3F);
+}
+
+int
+otx2_nix_tx_descriptor_status(void *tx_queue, uint16_t offset)
+{
+	struct otx2_eth_txq *txq = tx_queue;
+	uint32_t head, tail;
+
+	if (txq->qconf.nb_desc <= offset)
+		return -EINVAL;
+
+	nix_tx_head_tail_get(txq->dev, &head, &tail, txq->sq);
+
+	if (nix_offset_has_packet(head, tail, offset))
+		return RTE_ETH_TX_DESC_DONE;
+	else
+		return RTE_ETH_TX_DESC_FULL;
+}
+
 /* It is a NOP for octeontx2 as HW frees the buffer on xmit */
 int
 otx2_nix_tx_done_cleanup(void *txq, uint32_t free_cnt)
--
2.17.1