[PATCH] forcedeth config: csum

This patch allows for configurable rx and tx checksum offloads through
ethtool support.

Signed-Off-By: Ayaz Abdulla <aabdulla@nvidia.com>

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 77 insertions, 8 deletions

diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index d9b7345198c4..eaf6de9a9dfa 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -1707,14 +1707,16 @@ static void nv_rx_process(struct net_device *dev)
                                         }
                                 }
                         }
-                        Flags &= NV_RX2_CHECKSUMMASK;
-                        if (Flags == NV_RX2_CHECKSUMOK1 ||
-                                        Flags == NV_RX2_CHECKSUMOK2 ||
-                                        Flags == NV_RX2_CHECKSUMOK3) {
-                                dprintk(KERN_DEBUG "%s: hw checksum hit!.\n", dev->name);
-                                np->rx_skbuff[i]->ip_summed = CHECKSUM_UNNECESSARY;
-                        } else {
-                                dprintk(KERN_DEBUG "%s: hwchecksum miss!.\n", dev->name);
+                        if (np->txrxctl_bits & NVREG_TXRXCTL_RXCHECK) {
+                                Flags &= NV_RX2_CHECKSUMMASK;
+                                if (Flags == NV_RX2_CHECKSUMOK1 ||
+                                    Flags == NV_RX2_CHECKSUMOK2 ||
+                                    Flags == NV_RX2_CHECKSUMOK3) {
+                                        dprintk(KERN_DEBUG "%s: hw checksum hit!.\n", dev->name);
+                                        np->rx_skbuff[i]->ip_summed = CHECKSUM_UNNECESSARY;
+                                } else {
+                                        dprintk(KERN_DEBUG "%s: hwchecksum miss!.\n", dev->name);
+                                }
                         }
                 }
                 /* got a valid packet - forward it to the network core */
@@ -3021,6 +3023,67 @@ static int nv_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam*
         return 0;
 }
 
+static u32 nv_get_rx_csum(struct net_device *dev)
+{
+        struct fe_priv *np = netdev_priv(dev);
+        return (np->txrxctl_bits & NVREG_TXRXCTL_RXCHECK) != 0;
+}
+
+static int nv_set_rx_csum(struct net_device *dev, u32 data)
+{
+        struct fe_priv *np = netdev_priv(dev);
+        u8 __iomem *base = get_hwbase(dev);
+        int retcode = 0;
+
+        if (np->driver_data & DEV_HAS_CHECKSUM) {
+
+                if (((np->txrxctl_bits & NVREG_TXRXCTL_RXCHECK) && data) ||
+                    (!(np->txrxctl_bits & NVREG_TXRXCTL_RXCHECK) && !data)) {
+                        /* already set or unset */
+                        return 0;
+                }
+
+                if (data) {
+                        np->txrxctl_bits |= NVREG_TXRXCTL_RXCHECK;
+                } else if (!(np->vlanctl_bits & NVREG_VLANCONTROL_ENABLE)) {
+                        np->txrxctl_bits &= ~NVREG_TXRXCTL_RXCHECK;
+                } else {
+                        printk(KERN_INFO "Can not disable rx checksum if vlan is enabled\n");
+                        return -EINVAL;
+                }
+
+                if (netif_running(dev)) {
+                        spin_lock_irq(&np->lock);
+                        writel(np->txrxctl_bits, base + NvRegTxRxControl);
+                        spin_unlock_irq(&np->lock);
+                }
+        } else {
+                return -EINVAL;
+        }
+
+        return retcode;
+}
+
+static int nv_set_tx_csum(struct net_device *dev, u32 data)
+{
+        struct fe_priv *np = netdev_priv(dev);
+
+        if (np->driver_data & DEV_HAS_CHECKSUM)
+                return ethtool_op_set_tx_hw_csum(dev, data);
+        else
+                return -EOPNOTSUPP;
+}
+
+static int nv_set_sg(struct net_device *dev, u32 data)
+{
+        struct fe_priv *np = netdev_priv(dev);
+
+        if (np->driver_data & DEV_HAS_CHECKSUM)
+                return ethtool_op_set_sg(dev, data);
+        else
+                return -EOPNOTSUPP;
+}
+
 static struct ethtool_ops ops = {
         .get_drvinfo = nv_get_drvinfo,
         .get_link = ethtool_op_get_link,
@@ -3038,6 +3101,12 @@ static struct ethtool_ops ops = {
         .set_ringparam = nv_set_ringparam,
         .get_pauseparam = nv_get_pauseparam,
         .set_pauseparam = nv_set_pauseparam,
+        .get_rx_csum = nv_get_rx_csum,
+        .set_rx_csum = nv_set_rx_csum,
+        .get_tx_csum = ethtool_op_get_tx_csum,
+        .set_tx_csum = nv_set_tx_csum,
+        .get_sg = ethtool_op_get_sg,
+        .set_sg = nv_set_sg,
 };
 
 static void nv_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)