Hello, Our current NIC does not provide the actual checksum value on receive path. Hence we only claim NETIF_F_IP_CSUM instead of the more general NETIF_F_HW_CSUM.
To support this in a future adapter, we would like to know what exactly are the requirements (on both Rx and Tx )to claim NETIF_F_HW_CSUM ? Following are some specific questions: 1. On Tx, our adapter supports checksumming of TCP/UDP over IPv4 and IPv6. This computation is TCP/UDP specific. Does the checksum calculation need to be more generic ? Also, skbuff.h says that the checksum needs to be placed at a specific location(skb->h.raw+skb->csum). I guess this means the adapter needs to pass back the checksum to host driver after transmission. What happens in case of TSO ? 2. On Rx, is it suffficient if we place the L4 checksum in skb->csum ? What about L3 checksum ? Thanks, Ravi - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
