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drivers: net: cpsw: Add support for pause frames

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CPSW supports both rx and tx pause frames for flow control.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mugunthan V N 2014-09-08 22:54:02 +05:30 committed by David S. Miller
parent 119eccd5e7
commit 1923d6e418
1 changed files with 37 additions and 0 deletions
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37
drivers/net/ethernet/ti/cpsw.c
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@ -397,6 +397,8 @@ struct cpsw_priv {
struct cpdma_ctlr *dma;
struct cpdma_chan *txch, *rxch;
struct cpsw_ale *ale;
bool rx_pause;
bool tx_pause;
/* snapshot of IRQ numbers */
u32 irqs_table[4];
u32 num_irqs;
@ -832,6 +834,12 @@ static void _cpsw_adjust_link(struct cpsw_slave *slave,
else if (phy->speed == 10)
mac_control |= BIT(18); /* In Band mode */
if (priv->rx_pause)
mac_control |= BIT(3);
if (priv->tx_pause)
mac_control |= BIT(4);
*link = true;
} else {
mac_control = 0;
@ -1223,6 +1231,9 @@ static int cpsw_ndo_open(struct net_device *ndev)
/* enable statistics collection only on all ports */
__raw_writel(0x7, &priv->regs->stat_port_en);
/* Enable internal fifo flow control */
writel(0x7, &priv->regs->flow_control);
if (WARN_ON(!priv->data.rx_descs))
priv->data.rx_descs = 128;
@ -1784,6 +1795,30 @@ static int cpsw_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
return -EOPNOTSUPP;
}
static void cpsw_get_pauseparam(struct net_device *ndev,
struct ethtool_pauseparam *pause)
{
struct cpsw_priv *priv = netdev_priv(ndev);
pause->autoneg = AUTONEG_DISABLE;
pause->rx_pause = priv->rx_pause ? true : false;
pause->tx_pause = priv->tx_pause ? true : false;
}
static int cpsw_set_pauseparam(struct net_device *ndev,
struct ethtool_pauseparam *pause)
{
struct cpsw_priv *priv = netdev_priv(ndev);
bool link;
priv->rx_pause = pause->rx_pause ? true : false;
priv->tx_pause = pause->tx_pause ? true : false;
for_each_slave(priv, _cpsw_adjust_link, priv, &link);
return 0;
}
static const struct ethtool_ops cpsw_ethtool_ops = {
.get_drvinfo = cpsw_get_drvinfo,
.get_msglevel = cpsw_get_msglevel,
@ -1797,6 +1832,8 @@ static const struct ethtool_ops cpsw_ethtool_ops = {
.get_sset_count = cpsw_get_sset_count,
.get_strings = cpsw_get_strings,
.get_ethtool_stats = cpsw_get_ethtool_stats,
.get_pauseparam = cpsw_get_pauseparam,
.set_pauseparam = cpsw_set_pauseparam,
.get_wol = cpsw_get_wol,
.set_wol = cpsw_set_wol,
.get_regs_len = cpsw_get_regs_len,