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8139cp: enable bql

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This adds support for byte queue limits on RTL8139C+

Tested on real hardware.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-By: Dave Täht <dave.taht@bufferbloat.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Woodhouse 2012-11-22 03:16:58 +00:00 committed by David S. Miller
parent a9dbe40fc1
commit 871f0d4c15
1 changed files with 11 additions and 0 deletions
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11
drivers/net/ethernet/realtek/8139cp.c
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@ -648,6 +648,7 @@ static void cp_tx (struct cp_private *cp)
{
unsigned tx_head = cp->tx_head;
unsigned tx_tail = cp->tx_tail;
unsigned bytes_compl = 0, pkts_compl = 0;
while (tx_tail != tx_head) {
struct cp_desc *txd = cp->tx_ring + tx_tail;
@ -666,6 +667,9 @@ static void cp_tx (struct cp_private *cp)
le32_to_cpu(txd->opts1) & 0xffff,
PCI_DMA_TODEVICE);
bytes_compl += skb->len;
pkts_compl++;
if (status & LastFrag) {
if (status & (TxError | TxFIFOUnder)) {
netif_dbg(cp, tx_err, cp->dev,
@ -697,6 +701,7 @@ static void cp_tx (struct cp_private *cp)
cp->tx_tail = tx_tail;
netdev_completed_queue(cp->dev, pkts_compl, bytes_compl);
if (TX_BUFFS_AVAIL(cp) > (MAX_SKB_FRAGS + 1))
netif_wake_queue(cp->dev);
}
@ -843,6 +848,8 @@ static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
wmb();
}
cp->tx_head = entry;
netdev_sent_queue(dev, skb->len);
netif_dbg(cp, tx_queued, cp->dev, "tx queued, slot %d, skblen %d\n",
entry, skb->len);
if (TX_BUFFS_AVAIL(cp) <= (MAX_SKB_FRAGS + 1))
@ -937,6 +944,8 @@ static void cp_stop_hw (struct cp_private *cp)
cp->rx_tail = 0;
cp->tx_head = cp->tx_tail = 0;
netdev_reset_queue(cp->dev);
}
static void cp_reset_hw (struct cp_private *cp)
@ -987,6 +996,8 @@ static inline void cp_start_hw (struct cp_private *cp)
* This variant appears to work fine.
*/
cpw8(Cmd, RxOn | TxOn);
netdev_reset_queue(cp->dev);
}
static void cp_enable_irq(struct cp_private *cp)