[dpdk-dev] [PATCH 3/6] net/e1000: implement descriptor status API (igb)

Olivier Matz olivier.matz at 6wind.com
Wed Mar 1 18:19:09 CET 2017


Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
---
 drivers/net/e1000/e1000_ethdev.h |  5 +++++
 drivers/net/e1000/igb_ethdev.c   |  2 ++
 drivers/net/e1000/igb_rxtx.c     | 46 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+)

diff --git a/drivers/net/e1000/e1000_ethdev.h b/drivers/net/e1000/e1000_ethdev.h
index 81a6dbb..2b63b1a 100644
--- a/drivers/net/e1000/e1000_ethdev.h
+++ b/drivers/net/e1000/e1000_ethdev.h
@@ -311,6 +311,11 @@ uint32_t eth_igb_rx_queue_count(struct rte_eth_dev *dev,
 
 int eth_igb_rx_descriptor_done(void *rx_queue, uint16_t offset);
 
+int eth_igb_rx_descriptor_status(struct rte_eth_dev *dev,
+	uint16_t rx_queue_id, uint16_t offset);
+int eth_igb_tx_descriptor_status(struct rte_eth_dev *dev,
+	uint16_t tx_queue_id, uint16_t offset);
+
 int eth_igb_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 		uint16_t nb_tx_desc, unsigned int socket_id,
 		const struct rte_eth_txconf *tx_conf);
diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index a112b38..f6ed824 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -406,6 +406,8 @@ static const struct eth_dev_ops eth_igb_ops = {
 	.rx_queue_release     = eth_igb_rx_queue_release,
 	.rx_queue_count       = eth_igb_rx_queue_count,
 	.rx_descriptor_done   = eth_igb_rx_descriptor_done,
+	.rx_descriptor_status = eth_igb_rx_descriptor_status,
+	.tx_descriptor_status = eth_igb_tx_descriptor_status,
 	.tx_queue_setup       = eth_igb_tx_queue_setup,
 	.tx_queue_release     = eth_igb_tx_queue_release,
 	.dev_led_on           = eth_igb_led_on,
diff --git a/drivers/net/e1000/igb_rxtx.c b/drivers/net/e1000/igb_rxtx.c
index c9cf392..838413c 100644
--- a/drivers/net/e1000/igb_rxtx.c
+++ b/drivers/net/e1000/igb_rxtx.c
@@ -1606,6 +1606,52 @@ eth_igb_rx_descriptor_done(void *rx_queue, uint16_t offset)
 	return !!(rxdp->wb.upper.status_error & E1000_RXD_STAT_DD);
 }
 
+int
+eth_igb_rx_descriptor_status(struct rte_eth_dev *dev, uint16_t rx_queue_id,
+	uint16_t offset)
+{
+	volatile uint32_t *status;
+	struct igb_rx_queue *rxq;
+	uint32_t desc;
+
+	rxq = dev->data->rx_queues[rx_queue_id];
+	if (unlikely(offset >= rxq->nb_rx_desc))
+		return -EINVAL;
+
+	if (offset >= rxq->nb_rx_desc - rxq->nb_rx_hold)
+		return RTE_ETH_RX_DESC_USED;
+
+	desc = rxq->rx_tail + offset;
+	if (desc >= rxq->nb_rx_desc)
+		desc -= rxq->nb_rx_desc;
+
+	status = &rxq->rx_ring[desc].wb.upper.status_error;
+	if (*status & rte_cpu_to_le_32(E1000_RXD_STAT_DD))
+		return RTE_ETH_RX_DESC_DONE;
+
+	return RTE_ETH_RX_DESC_AVAIL;
+}
+
+int
+eth_igb_tx_descriptor_status(struct rte_eth_dev *dev, uint16_t tx_queue_id,
+	uint16_t offset)
+{
+	volatile uint32_t *status;
+	struct igb_tx_queue *txq;
+	uint32_t desc;
+
+	txq = dev->data->tx_queues[tx_queue_id];
+	if (unlikely(offset >= txq->nb_tx_desc))
+		return -EINVAL;
+
+	desc = txq->tx_tail + offset;
+	status = &txq->tx_ring[desc].wb.status;
+	if (*status & rte_cpu_to_le_32(E1000_TXD_STAT_DD))
+		return RTE_ETH_TX_DESC_DONE;
+
+	return RTE_ETH_TX_DESC_FULL;
+}
+
 void
 igb_dev_clear_queues(struct rte_eth_dev *dev)
 {
-- 
2.8.1



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