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ixgbe: add support for byte queue limits 

This adds support for byte queue limits (BQL).

Based on patch from Eric Dumazet for igb.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
This commit is contained in:
Alexander Duyck 2012-02-07 08:14:33 +00:00 committed by Jeff Kirsher
parent 35551c4749
commit b2d96e0ac0
2 changed files with 12 additions and 0 deletions
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5
drivers/net/ethernet/intel/ixgbe/ixgbe.h
View File

@ -643,4 +643,9 @@ extern int ixgbe_fcoe_get_hbainfo(struct net_device *netdev,
struct netdev_fcoe_hbainfo *info);
#endif /* IXGBE_FCOE */
static inline struct netdev_queue *txring_txq(const struct ixgbe_ring *ring)
{
return netdev_get_tx_queue(ring->netdev, ring->queue_index);
}
#endif /* _IXGBE_H_ */

7
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -840,6 +840,9 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
return true;
}
netdev_tx_completed_queue(txring_txq(tx_ring),
total_packets, total_bytes);
#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
(ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
@ -2617,6 +2620,8 @@ void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
/* enable queue */
IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
netdev_tx_reset_queue(txring_txq(ring));
/* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
if (hw->mac.type == ixgbe_mac_82598EB &&
!(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
@ -6808,6 +6813,8 @@ static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
tx_buffer_info->gso_segs = gso_segs;
tx_buffer_info->skb = skb;
netdev_tx_sent_queue(txring_txq(tx_ring), tx_buffer_info->bytecount);
/* set the timestamp */
first->time_stamp = jiffies;