M
meerkat
Hi,
Mapping the skb data to dma sometimes includes a bounce buffer (if the skb is out of the dma area)
My dma bitmask is unusual, and so I'm getting a lot of those bounce buffers.
My question is -
Is there a way to make sure that the skb is allocated in my dma region before I get it in the xmit function? This way I can keep the zero-copy in the tx, and avoid the bounce buffer at the same time.
Only 2 options I came up with are:
1. map the skb data (--> bounce buffer)
2. memcpy the skb data and then map it (no more zero-copy)
Thanks!
Roy
Continue reading...
Mapping the skb data to dma sometimes includes a bounce buffer (if the skb is out of the dma area)
My dma bitmask is unusual, and so I'm getting a lot of those bounce buffers.
My question is -
Is there a way to make sure that the skb is allocated in my dma region before I get it in the xmit function? This way I can keep the zero-copy in the tx, and avoid the bounce buffer at the same time.
Only 2 options I came up with are:
1. map the skb data (--> bounce buffer)
2. memcpy the skb data and then map it (no more zero-copy)
Thanks!
Roy
Continue reading...
