From: Intel <intel.com>
Date: Mon, 22 Jul 2013 22:00:00 +0000 (+0200)
Subject: ixgbe: check DD bit for specific RX descriptor
X-Git-Tag: spdx-start~11170
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=11c378b199c662a133fe61482b06f870a56a4c5b;p=dpdk.git

ixgbe: check DD bit for specific RX descriptor

Signed-off-by: Intel
---

diff --git a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
index 1434ac9dc3..e26d5b9351 100644
--- a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
+++ b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
@@ -244,6 +244,7 @@ static struct eth_dev_ops ixgbe_eth_dev_ops = {
 	.rx_queue_setup       = ixgbe_dev_rx_queue_setup,
 	.rx_queue_release     = ixgbe_dev_rx_queue_release,
 	.rx_queue_count       = ixgbe_dev_rx_queue_count,
+	.rx_descriptor_done   = ixgbe_dev_rx_descriptor_done,
 	.tx_queue_setup       = ixgbe_dev_tx_queue_setup,
 	.tx_queue_release     = ixgbe_dev_tx_queue_release,
 	.dev_led_on           = ixgbe_dev_led_on,
diff --git a/lib/librte_pmd_ixgbe/ixgbe_ethdev.h b/lib/librte_pmd_ixgbe/ixgbe_ethdev.h
index e9ddfc2ef6..260622a63b 100644
--- a/lib/librte_pmd_ixgbe/ixgbe_ethdev.h
+++ b/lib/librte_pmd_ixgbe/ixgbe_ethdev.h
@@ -175,6 +175,8 @@ int  ixgbe_dev_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 uint32_t ixgbe_dev_rx_queue_count(struct rte_eth_dev *dev, 
 		uint16_t rx_queue_id);
 
+int ixgbe_dev_rx_descriptor_done(void *rx_queue, uint16_t offset);
+
 int ixgbe_dev_rx_init(struct rte_eth_dev *dev);
 
 void ixgbe_dev_tx_init(struct rte_eth_dev *dev);
diff --git a/lib/librte_pmd_ixgbe/ixgbe_rxtx.c b/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
index 8e7cb2693a..3039faaa66 100644
--- a/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
+++ b/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
@@ -2299,6 +2299,23 @@ ixgbe_dev_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 	return desc;
 }
 
+int
+ixgbe_dev_rx_descriptor_done(void *rx_queue, uint16_t offset)
+{
+	volatile union ixgbe_adv_rx_desc *rxdp;
+	struct igb_rx_queue *rxq = rx_queue;
+	uint32_t desc;
+
+	if (unlikely(offset >= rxq->nb_rx_desc))
+		return 0;
+	desc = rxq->rx_tail + offset;
+	if (desc >= rxq->nb_rx_desc)
+		desc -= rxq->nb_rx_desc;
+
+	rxdp = &rxq->rx_ring[desc];
+	return !!(rxdp->wb.upper.status_error & IXGBE_RXDADV_STAT_DD);
+}
+
 void
 ixgbe_dev_clear_queues(struct rte_eth_dev *dev)
 {