Brian King wrote:
Jeff Garzik wrote:
Brian King wrote:
This patch adds the appropriate ethtool hooks to allow for enabling/disabling
of hypervisor assisted checksum offload for TCP.
Signed-off-by: Brian King <[EMAIL PROTECTED]>
---
linux-2.6-bjking1/drivers/net/ibmveth.c | 118 +++++++++++++++++++++++++++++++-
linux-2.6-bjking1/drivers/net/ibmveth.h | 1
2 files changed, 117 insertions(+), 2 deletions(-)
diff -puN drivers/net/ibmveth.c~ibmveth_csum_offload_ethtool
drivers/net/ibmveth.c
--- linux-2.6/drivers/net/ibmveth.c~ibmveth_csum_offload_ethtool
2007-08-01 14:55:14.000000000 -0500
+++ linux-2.6-bjking1/drivers/net/ibmveth.c 2007-08-01 14:55:14.000000000
-0500
@@ -641,12 +641,125 @@ static u32 netdev_get_link(struct net_de
return 1;
}
+static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
+{
+ struct ibmveth_adapter *adapter = dev->priv;
+
+ if (data)
+ adapter->rx_csum = 1;
+ else {
+ adapter->rx_csum = 0;
+ dev->features &= ~NETIF_F_IP_CSUM;
why does this RX-related code clear a TX-related flag?
Its related to how the pSeries firmware works. The firmware provides an
interface
to enable "checksum offload", which means both tx and rx checksum offload from
the firmware's point of view. The firmware does not support enabling checksum
offload for only rx. If I disable it for rx I have to disable it for tx as
well, otherwise the firmware will reject all future tx buffers I throw at it
that are not checksummed.
ACK once you add a comment describing this :)
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