Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 85ff3d87 authored by Cyrille Pitchen's avatar Cyrille Pitchen Committed by David S. Miller
Browse files

net/macb: add TX checksum offload feature 



Signed-off-by: default avatarCyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a4c35ed3

drivers/net/ethernet/cadence/macb.c

+29 −0
Original line number Diff line number Diff line
@@ -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;