net/igb: implement descriptor status API

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>

diff --git a/doc/guides/nics/features/igb.ini b/doc/guides/nics/features/igb.ini
index 26ae008..1145027 100644 (file)
--- a/doc/guides/nics/features/igb.ini
+++ b/doc/guides/nics/features/igb.ini
@@ -33,6 +33,8 @@ L3 checksum offload  = Y
 L4 checksum offload  = Y
 Packet type parsing  = Y
 Timesync             = Y
+Rx descriptor status = Y
+Tx descriptor status = Y
 Basic stats          = Y
 Extended stats       = Y
 FW version           = Y

diff --git a/doc/guides/nics/features/igb_vf.ini b/doc/guides/nics/features/igb_vf.ini
index b617820..e641a2c 100644 (file)
--- a/doc/guides/nics/features/igb_vf.ini
+++ b/doc/guides/nics/features/igb_vf.ini
@@ -17,6 +17,8 @@ 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
 Registers dump       = Y

diff --git a/drivers/net/e1000/e1000_ethdev.h b/drivers/net/e1000/e1000_ethdev.h
index f8dc72f..8352d0a 100644 (file)
--- a/drivers/net/e1000/e1000_ethdev.h
+++ b/drivers/net/e1000/e1000_ethdev.h
@@ -311,6 +311,9 @@ 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(void *rx_queue, uint16_t offset);
+int eth_igb_tx_descriptor_status(void *tx_queue, 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 71d05a9..a73cd7a 100644 (file)
--- 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,
        .tx_done_cleanup      = eth_igb_tx_done_cleanup,

diff --git a/drivers/net/e1000/igb_rxtx.c b/drivers/net/e1000/igb_rxtx.c
index cba3704..b3b601b 100644 (file)
--- a/drivers/net/e1000/igb_rxtx.c
+++ b/drivers/net/e1000/igb_rxtx.c
@@ -1727,6 +1727,51 @@ 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(void *rx_queue, uint16_t offset)
+{
+       struct igb_rx_queue *rxq = rx_queue;
+       volatile uint32_t *status;
+       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.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(void *tx_queue, uint16_t offset)
+{
+       struct igb_tx_queue *txq = tx_queue;
+       volatile uint32_t *status;
+       uint32_t desc;
+
+       if (unlikely(offset >= txq->nb_tx_desc))
+               return -EINVAL;
+
+       desc = txq->tx_tail + offset;
+       if (desc >= txq->nb_tx_desc)
+               desc -= txq->nb_tx_desc;
+
+       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)
 {