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net/wan/fsl_ucc_hdlc: add BQL support 

Add byte queue limits support in the fsl_ucc_hdlc driver.

Signed-off-by: Mathias Thore <mathias.thore@infinera.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mathias Thore 2018-11-07 09:09:45 +01:00 committed by David S. Miller
parent 3b73e842c7
commit 2e7ad56aa5
1 changed files with 8 additions and 0 deletions
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8
drivers/net/wan/fsl_ucc_hdlc.c
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@ -391,6 +391,7 @@ static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev)
dev_kfree_skb(skb);
return -ENOMEM;
}
netdev_sent_queue(dev, skb->len);
spin_lock_irqsave(&priv->lock, flags);
/* Start from the next BD that should be filled */
@ -447,6 +448,8 @@ static int hdlc_tx_done(struct ucc_hdlc_private *priv)
{
/* Start from the next BD that should be filled */
struct net_device *dev = priv->ndev;
unsigned int bytes_sent = 0;
int howmany = 0;
struct qe_bd *bd; /* BD pointer */
u16 bd_status;
int tx_restart = 0;
@ -474,6 +477,8 @@ static int hdlc_tx_done(struct ucc_hdlc_private *priv)
skb = priv->tx_skbuff[priv->skb_dirtytx];
if (!skb)
break;
howmany++;
bytes_sent += skb->len;
dev->stats.tx_packets++;
memset(priv->tx_buffer +
(be32_to_cpu(bd->buf) - priv->dma_tx_addr),
@ -501,6 +506,7 @@ static int hdlc_tx_done(struct ucc_hdlc_private *priv)
if (tx_restart)
hdlc_tx_restart(priv);
netdev_completed_queue(dev, howmany, bytes_sent);
return 0;
}
@ -721,6 +727,7 @@ static int uhdlc_open(struct net_device *dev)
priv->hdlc_busy = 1;
netif_device_attach(priv->ndev);
napi_enable(&priv->napi);
netdev_reset_queue(dev);
netif_start_queue(dev);
hdlc_open(dev);
}
@ -812,6 +819,7 @@ static int uhdlc_close(struct net_device *dev)
free_irq(priv->ut_info->uf_info.irq, priv);
netif_stop_queue(dev);
netdev_reset_queue(dev);
priv->hdlc_busy = 0;
return 0;