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Date: Sun, 18 Jun 2017 23:55:59 -0400 (EDT) From: David Miller <davem@...emloft.net> To: felix.manlunas@...ium.com Cc: netdev@...r.kernel.org, raghu.vatsavayi@...ium.com, derek.chickles@...ium.com, satananda.burla@...ium.com, prasad.kanneganti@...ium.com Subject: Re: [PATCH net-next] liquidio: replace info-pointer mode with buffer-pointer-only mode From: Felix Manlunas <felix.manlunas@...ium.com> Date: Sun, 18 Jun 2017 05:04:11 -0700 > From: Prasad Kanneganti <prasad.kanneganti@...ium.com> > > Each Octeon output ring can DMA packets to host memory in two modes: info- > pointer mode and buffer-pointer-only mode. In info-pointer mode, Octeon > takes two buffer pointers for each packet and places the length of the > packet along with specified number of bytes from the beginning of the > packet into one buffer and the rest of the packet in a separate buffer. In > buffer-pointer-only mode, Octeon takes single buffer pointer and places the > length of the packet at the beginning of the buffer followed by the packet > data. > > This patch switches all Octeon output rings from info-pointer mode to > buffer-pointer-only mode. This results in fewer DMA setups and cache line > snoops. > > Signed-off-by: Prasad Kanneganti <pkanneganti@...ium.com> > Signed-off-by: Derek Chickles <derek.chickles@...ium.com> > Signed-off-by: Satanand Burla <satananda.burla@...ium.com> > Signed-off-by: Felix Manlunas <felix.manlunas@...ium.com> Applied.
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