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net/macb: add TX checksum offload feature 

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cyrille Pitchen 2014-07-24 13:51:00 +02:00 committed by David S. Miller
parent a4c35ed3fb
commit 85ff3d87bf
1 changed files with 29 additions and 0 deletions
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29
drivers/net/ethernet/cadence/macb.c
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@ -1525,6 +1525,10 @@ static void macb_configure_dma(struct macb *bp)
dmacfg = GEM_BFINS(FBLDO, bp->dma_burst_length, dmacfg);
dmacfg |= GEM_BIT(TXPBMS) | GEM_BF(RXBMS, -1L);
dmacfg &= ~GEM_BIT(ENDIA);
if (bp->dev->features & NETIF_F_HW_CSUM)
dmacfg |= GEM_BIT(TXCOEN);
else
dmacfg &= ~GEM_BIT(TXCOEN);
netdev_dbg(bp->dev, "Cadence configure DMA with 0x%08x\n",
dmacfg);
gem_writel(bp, DMACFG, dmacfg);
@ -1925,6 +1929,27 @@ int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
}
EXPORT_SYMBOL_GPL(macb_ioctl);
static int macb_set_features(struct net_device *netdev,
netdev_features_t features)
{
struct macb *bp = netdev_priv(netdev);
netdev_features_t changed = features ^ netdev->features;
/* TX checksum offload */
if ((changed & NETIF_F_HW_CSUM) && macb_is_gem(bp)) {
u32 dmacfg;
dmacfg = gem_readl(bp, DMACFG);
if (features & NETIF_F_HW_CSUM)
dmacfg |= GEM_BIT(TXCOEN);
else
dmacfg &= ~GEM_BIT(TXCOEN);
gem_writel(bp, DMACFG, dmacfg);
}
return 0;
}
static const struct net_device_ops macb_netdev_ops = {
.ndo_open = macb_open,
.ndo_stop = macb_close,
@ -1938,6 +1963,7 @@ static const struct net_device_ops macb_netdev_ops = {
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = macb_poll_controller,
#endif
.ndo_set_features = macb_set_features,
};
#if defined(CONFIG_OF)
@ -2122,6 +2148,9 @@ static int __init macb_probe(struct platform_device *pdev)
/* Set features */
dev->hw_features = NETIF_F_SG;
/* Checksum offload is only available on gem with packet buffer */
if (macb_is_gem(bp) && !(bp->caps & MACB_CAPS_FIFO_MODE))
dev->hw_features |= NETIF_F_HW_CSUM;
if (bp->caps & MACB_CAPS_SG_DISABLED)
dev->hw_features &= ~NETIF_F_SG;
dev->features = dev->hw_features;