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a73d8779d6
Offloading MACsec in PHYs requires inserting the SecTAG and the ICV in the ethernet frame. This operation will increase the frame size with up to 32 bytes. If the frames are sent at line rate, the PHY will not have enough room to insert the SecTAG and the ICV. Some PHYs use a hardware buffer to store a number of ethernet frames and, if it fills up, a pause frame is sent to the MAC to control the flow. This HW implementation does not need any modification in the stack. Other PHYs might offer to use a specific ethertype with some padding bytes present in the ethernet frame. This ethertype and its associated bytes will be replaced by the SecTAG and ICV. mdo_insert_tx_tag allows the PHY drivers to add any specific tag in the skb. Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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