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Date: Fri, 18 Jul 2014 16:21:15 +0200 From: Cyrille Pitchen <cyrille.pitchen@...el.com> To: <nicolas.ferre@...el.com>, <davem@...emloft.net>, <linux-arm-kernel@...ts.infradead.org>, <netdev@...r.kernel.org>, <soren.brinkmann@...inx.com> CC: <linux-kernel@...r.kernel.org>, Cyrille Pitchen <cyrille.pitchen@...el.com> Subject: [PATCH 3/6] net/macb: add TX checksum offload feature Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...el.com> --- drivers/net/ethernet/cadence/macb.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c index 06e9934..9bdcd1b 100644 --- a/drivers/net/ethernet/cadence/macb.c +++ b/drivers/net/ethernet/cadence/macb.c @@ -1524,6 +1524,10 @@ 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); } @@ -1923,6 +1927,27 @@ 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, @@ -1936,6 +1961,7 @@ 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) @@ -2118,6 +2144,10 @@ static int __init macb_probe(struct platform_device *pdev) /* Set features */ dev->hw_features = NETIF_F_SG; + if (macb_is_gem(bp) && !(bp->caps & MACB_CAPS_FIFO_MODE)) { + /* Checksum offload is only available on packet buffer design */ + 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; -- 1.8.2.2 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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