[dpdk-dev] [PATCH v4 32/32] net/ice: support descriptor ops

[Wenzhuo Lu <wenzhuo.lu@intel.com>]

Add below ops,
rx_descriptor_status
tx_descriptor_status

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Signed-off-by: Qiming Yang <qiming.yang@intel.com>
Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
---
 doc/guides/nics/features/ice.ini |  2 ++
 drivers/net/ice/ice_ethdev.c     |  2 ++
 drivers/net/ice/ice_lan_rxtx.c   | 58 ++++++++++++++++++++++++++++++++++++++++
 drivers/net/ice/ice_rxtx.h       |  2 ++
 4 files changed, 64 insertions(+)

diff --git a/doc/guides/nics/features/ice.ini b/doc/guides/nics/features/ice.ini
index 300eced..196b8d5 100644
--- a/doc/guides/nics/features/ice.ini
+++ b/doc/guides/nics/features/ice.ini
@@ -25,6 +25,8 @@ QinQ offload         = Y
 L3 checksum offload  = Y
 L4 checksum offload  = Y
 Packet type parsing  = Y
+Rx descriptor status = Y
+Tx descriptor status = Y
 Basic stats          = Y
 Extended stats       = Y
 FW version           = Y
diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index 6a51033..2ec9e89 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -112,6 +112,8 @@ static int ice_xstats_get_names(struct rte_eth_dev *dev,
 	.get_eeprom_length            = ice_get_eeprom_length,
 	.get_eeprom                   = ice_get_eeprom,
 	.rx_queue_count               = ice_rx_queue_count,
+	.rx_descriptor_status         = ice_rx_descriptor_status,
+	.tx_descriptor_status         = ice_tx_descriptor_status,
 	.stats_get                    = ice_stats_get,
 	.stats_reset                  = ice_stats_reset,
 	.xstats_get                   = ice_xstats_get,
diff --git a/drivers/net/ice/ice_lan_rxtx.c b/drivers/net/ice/ice_lan_rxtx.c
index 986cbc6..8bfd34f 100644
--- a/drivers/net/ice/ice_lan_rxtx.c
+++ b/drivers/net/ice/ice_lan_rxtx.c
@@ -1490,6 +1490,64 @@
 	return desc;
 }
 
+int
+ice_rx_descriptor_status(void *rx_queue, uint16_t offset)
+{
+	struct ice_rx_queue *rxq = rx_queue;
+	volatile uint64_t *status;
+	uint64_t mask;
+	uint32_t desc;
+
+	if (unlikely(offset >= rxq->nb_rx_desc))
+		return -EINVAL;
+
+	if (offset >= rxq->nb_rx_desc - rxq->nb_rx_hold)
+		return RTE_ETH_RX_DESC_UNAVAIL;
+
+	desc = rxq->rx_tail + offset;
+	if (desc >= rxq->nb_rx_desc)
+		desc -= rxq->nb_rx_desc;
+
+	status = &rxq->rx_ring[desc].wb.qword1.status_error_len;
+	mask = rte_cpu_to_le_64((1ULL << ICE_RX_DESC_STATUS_DD_S) <<
+				ICE_RXD_QW1_STATUS_S);
+	if (*status & mask)
+		return RTE_ETH_RX_DESC_DONE;
+
+	return RTE_ETH_RX_DESC_AVAIL;
+}
+
+int
+ice_tx_descriptor_status(void *tx_queue, uint16_t offset)
+{
+	struct ice_tx_queue *txq = tx_queue;
+	volatile uint64_t *status;
+	uint64_t mask, expect;
+	uint32_t desc;
+
+	if (unlikely(offset >= txq->nb_tx_desc))
+		return -EINVAL;
+
+	desc = txq->tx_tail + offset;
+	/* go to next desc that has the RS bit */
+	desc = ((desc + txq->tx_rs_thresh - 1) / txq->tx_rs_thresh) *
+		txq->tx_rs_thresh;
+	if (desc >= txq->nb_tx_desc) {
+		desc -= txq->nb_tx_desc;
+		if (desc >= txq->nb_tx_desc)
+			desc -= txq->nb_tx_desc;
+	}
+
+	status = &txq->tx_ring[desc].cmd_type_offset_bsz;
+	mask = rte_cpu_to_le_64(ICE_TXD_QW1_DTYPE_M);
+	expect = rte_cpu_to_le_64(ICE_TX_DESC_DTYPE_DESC_DONE <<
+				  ICE_TXD_QW1_DTYPE_S);
+	if ((*status & mask) == expect)
+		return RTE_ETH_TX_DESC_DONE;
+
+	return RTE_ETH_TX_DESC_FULL;
+}
+
 void
 ice_clear_queues(struct rte_eth_dev *dev)
 {
diff --git a/drivers/net/ice/ice_rxtx.h b/drivers/net/ice/ice_rxtx.h
index e0218b3..a0aa8f9 100644
--- a/drivers/net/ice/ice_rxtx.h
+++ b/drivers/net/ice/ice_rxtx.h
@@ -143,6 +143,8 @@ uint16_t ice_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
 		       uint16_t nb_pkts);
 void ice_set_tx_function(struct rte_eth_dev *dev);
 uint32_t ice_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id);
+int ice_rx_descriptor_status(void *rx_queue, uint16_t offset);
+int ice_tx_descriptor_status(void *tx_queue, uint16_t offset);
 void ice_set_default_ptype_table(struct rte_eth_dev *dev);
 const uint32_t *ice_dev_supported_ptypes_get(struct rte_eth_dev *dev);
 void ice_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
-- 
1.9.3