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Message-ID: <20120119164354.78ea63d6@nehalam.linuxnetplumber.net>
Date: Thu, 19 Jan 2012 16:43:54 -0800
From: Stephen Hemminger <shemminger@...tta.com>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org
Subject: [PATCH 3/3] skge: add byte queue limit support
This also changes the cleanup logic slightly to aggregate
completed notifications for multiple packets.
Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
--- a/drivers/net/ethernet/marvell/skge.c 2012-01-19 16:12:19.000000000 -0800
+++ b/drivers/net/ethernet/marvell/skge.c 2012-01-19 16:42:17.675908798 -0800
@@ -2831,6 +2831,7 @@ static netdev_tx_t skge_xmit_frame(struc
netif_stop_queue(dev);
}
+ netdev_sent_queue(dev, skb->len);
return NETDEV_TX_OK;
mapping_unwind:
@@ -2858,11 +2859,9 @@ mapping_error:
/* Free resources associated with this reing element */
-static void skge_tx_free(struct skge_port *skge, struct skge_element *e,
- u32 control)
+static inline void skge_tx_unmap(struct pci_dev *pdev, struct skge_element *e,
+ u32 control)
{
- struct pci_dev *pdev = skge->hw->pdev;
-
/* skb header vs. fragment */
if (control & BMU_STF)
pci_unmap_single(pdev, dma_unmap_addr(e, mapaddr),
@@ -2872,13 +2871,6 @@ static void skge_tx_free(struct skge_por
pci_unmap_page(pdev, dma_unmap_addr(e, mapaddr),
dma_unmap_len(e, maplen),
PCI_DMA_TODEVICE);
-
- if (control & BMU_EOF) {
- netif_printk(skge, tx_done, KERN_DEBUG, skge->netdev,
- "tx done slot %td\n", e - skge->tx_ring.start);
-
- dev_kfree_skb(e->skb);
- }
}
/* Free all buffers in transmit ring */
@@ -2889,10 +2881,15 @@ static void skge_tx_clean(struct net_dev
for (e = skge->tx_ring.to_clean; e != skge->tx_ring.to_use; e = e->next) {
struct skge_tx_desc *td = e->desc;
- skge_tx_free(skge, e, td->control);
+
+ skge_tx_unmap(skge->hw->pdev, e, td->control);
+
+ if (td->control & BMU_EOF)
+ dev_kfree_skb(e->skb);
td->control = 0;
}
+ netdev_reset_queue(dev);
skge->tx_ring.to_clean = e;
}
@@ -3157,6 +3154,7 @@ static void skge_tx_done(struct net_devi
struct skge_port *skge = netdev_priv(dev);
struct skge_ring *ring = &skge->tx_ring;
struct skge_element *e;
+ unsigned int bytes_compl = 0, pkts_compl = 0;
skge_write8(skge->hw, Q_ADDR(txqaddr[skge->port], Q_CSR), CSR_IRQ_CL_F);
@@ -3166,8 +3164,20 @@ static void skge_tx_done(struct net_devi
if (control & BMU_OWN)
break;
- skge_tx_free(skge, e, control);
+ skge_tx_unmap(skge->hw->pdev, e, control);
+
+ if (control & BMU_EOF) {
+ netif_printk(skge, tx_done, KERN_DEBUG, skge->netdev,
+ "tx done slot %td\n",
+ e - skge->tx_ring.start);
+
+ pkts_compl++;
+ bytes_compl += e->skb->len;
+
+ dev_kfree_skb(e->skb);
+ }
}
+ netdev_completed_queue(dev, pkts_compl, bytes_compl);
skge->tx_ring.to_clean = e;
/* Can run lockless until we need to synchronize to restart queue. */
--
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