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ar71xx: ag71xx: add BQL support 

It will be usable only from linux-3.3.

Based on a patch by Dave Taht <dave.taht@bufferbloat.net>

SVN-Revision: 30417
lede-17.01
Gabor Juhos 2012-02-10 14:56:47 +00:00
parent fc069f030b
commit 766999085a
1 changed files with 13 additions and 5 deletions
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18
target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
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@ -134,6 +134,7 @@ static void ag71xx_ring_tx_clean(struct ag71xx *ag)
{
struct ag71xx_ring *ring = &ag->tx_ring;
struct net_device *dev = ag->dev;
u32 bytes_compl = 0, pkts_compl = 0;
while (ring->curr != ring->dirty) {
u32 i = ring->dirty % ring->size;
@ -143,17 +144,19 @@ static void ag71xx_ring_tx_clean(struct ag71xx *ag)
dev->stats.tx_errors++;
}
if (ring->buf[i].skb)
if (ring->buf[i].skb) {
bytes_compl += ring->buf[i].skb->len;
pkts_compl++;
dev_kfree_skb_any(ring->buf[i].skb);
}
ring->buf[i].skb = NULL;
ring->dirty++;
}
/* flush descriptors */
wmb();
netdev_completed_queue(dev, pkts_compl, bytes_compl);
}
static void ag71xx_ring_tx_init(struct ag71xx *ag)
@ -174,6 +177,7 @@ static void ag71xx_ring_tx_init(struct ag71xx *ag)
ring->curr = 0;
ring->dirty = 0;
netdev_reset_queue(ag->dev);
}
static void ag71xx_ring_rx_clean(struct ag71xx *ag)
@ -326,6 +330,7 @@ static void ag71xx_rings_cleanup(struct ag71xx *ag)
ag71xx_ring_free(&ag->rx_ring);
ag71xx_ring_tx_clean(ag);
netdev_reset_queue(ag->dev);
ag71xx_ring_free(&ag->tx_ring);
}
@ -691,6 +696,7 @@ static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb,
dma_addr = dma_map_single(&dev->dev, skb->data, skb->len,
DMA_TO_DEVICE);
netdev_sent_queue(dev, skb->len);
ring->buf[i].skb = skb;
ring->buf[i].timestamp = jiffies;
@ -822,11 +828,11 @@ static int ag71xx_tx_packets(struct ag71xx *ag)
{
struct ag71xx_ring *ring = &ag->tx_ring;
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
int sent;
int sent = 0;
int bytes_compl = 0;
DBG("%s: processing TX ring\n", ag->dev->name);
sent = 0;
while (ring->dirty != ring->curr) {
unsigned int i = ring->dirty % ring->size;
struct ag71xx_desc *desc = ring->buf[i].desc;
@ -841,6 +847,7 @@ static int ag71xx_tx_packets(struct ag71xx *ag)
ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
bytes_compl += skb->len;
ag->dev->stats.tx_bytes += skb->len;
ag->dev->stats.tx_packets++;
@ -853,6 +860,7 @@ static int ag71xx_tx_packets(struct ag71xx *ag)
DBG("%s: %d packets sent out\n", ag->dev->name, sent);
netdev_completed_queue(ag->dev, sent, bytes_compl);
if ((ring->curr - ring->dirty) < (ring->size * 3) / 4)
netif_wake_queue(ag->dev);