[E1000-devel] Did e1000e driver perform copy when receiving?

[Xi C. <bl8...@gm...>]

Hi
  Currently, I am working on zero copy. The way I do is using user buffer as skb
data area, and use kmap, map it into kernel. As my understand, When e1000e
invoke alloc_skb, it will get the construct skb. And use dma_signle_map get phy
address and later on use dma copy copy it into skb data area. Is that correct ?
Did e1000e driver perform other copy or checksum for received skb. And I think
e1000_clean_rx_irq is the receive entry. I don't know if it is right. 
  Second question is if I want to discard rx checksum and tx checksum in
hardware, is there anything I can do? 
  Have a nice day