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| author | Igor Maravic <igorm@etf.rs> | 2012-03-05 00:01:25 +0100 |
|---|---|---|
| committer | Francois Romieu <romieu@fr.zoreil.com> | 2012-03-06 00:24:26 +0100 |
| commit | 036dafa28da1e2565a8529de2ae663c37b7a0060 (patch) | |
| tree | 97df33f26323d324964412939aa2b60dd15c7b88 | |
| parent | 8027aa245bbd125350f6a78c5a78771d143aba55 (diff) | |
| download | linux-036dafa28da1e2565a8529de2ae663c37b7a0060.tar.gz linux-036dafa28da1e2565a8529de2ae663c37b7a0060.tar.bz2 linux-036dafa28da1e2565a8529de2ae663c37b7a0060.zip | |
r8169: add byte queue limit support.
Nothing fancy:
- sent bytes count is notified in the start_xmit path right before
updating the owner bit in the hardware Tx descriptor (E. Dumazet)
- avoid useless tp->dev dereferencing in start_xmit (E. Dumazet)
Use of netdev_reset_queue is favored over proper accounting in
rtl8169_tx_clear_range since the latter would need more work for the
same result (nb: said accounting degenerates to nothing in xmit_frags).
Signed-off-by: Igor Maravic <igorm@etf.rs>
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
| -rw-r--r-- | drivers/net/ethernet/realtek/r8169.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c index a4d7674886a2..515a7edb605c 100644 --- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -5399,6 +5399,7 @@ static void rtl8169_tx_clear(struct rtl8169_private *tp) { rtl8169_tx_clear_range(tp, tp->dirty_tx, NUM_TX_DESC); tp->cur_tx = tp->dirty_tx = 0; + netdev_reset_queue(tp->dev); } static void rtl_reset_work(struct rtl8169_private *tp) @@ -5553,6 +5554,8 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb, txd->opts2 = cpu_to_le32(opts[1]); + netdev_sent_queue(dev, skb->len); + wmb(); /* Anti gcc 2.95.3 bugware (sic) */ @@ -5647,9 +5650,16 @@ static void rtl8169_pcierr_interrupt(struct net_device *dev) rtl_schedule_task(tp, RTL_FLAG_TASK_RESET_PENDING); } +struct rtl_txc { + int packets; + int bytes; +}; + static void rtl_tx(struct net_device *dev, struct rtl8169_private *tp) { + struct rtl8169_stats *tx_stats = &tp->tx_stats; unsigned int dirty_tx, tx_left; + struct rtl_txc txc = { 0, 0 }; dirty_tx = tp->dirty_tx; smp_rmb(); @@ -5668,17 +5678,24 @@ static void rtl_tx(struct net_device *dev, struct rtl8169_private *tp) rtl8169_unmap_tx_skb(&tp->pci_dev->dev, tx_skb, tp->TxDescArray + entry); if (status & LastFrag) { - u64_stats_update_begin(&tp->tx_stats.syncp); - tp->tx_stats.packets++; - tp->tx_stats.bytes += tx_skb->skb->len; - u64_stats_update_end(&tp->tx_stats.syncp); - dev_kfree_skb(tx_skb->skb); + struct sk_buff *skb = tx_skb->skb; + + txc.packets++; + txc.bytes += skb->len; + dev_kfree_skb(skb); tx_skb->skb = NULL; } dirty_tx++; tx_left--; } + u64_stats_update_begin(&tx_stats->syncp); + tx_stats->packets += txc.packets; + tx_stats->bytes += txc.bytes; + u64_stats_update_end(&tx_stats->syncp); + + netdev_completed_queue(dev, txc.packets, txc.bytes); + if (tp->dirty_tx != dirty_tx) { tp->dirty_tx = dirty_tx; /* Sync with rtl8169_start_xmit: |