From: Sven Van Asbroeck <thesve...@gmail.com> The first patch of this series boosts the chip's rx performance by up to 3x on cpus such as ARM. However it introduces a breaking change: the mtu can no longer be changed while the network interface is up.
To get around this efficiently, the second patch adds driver support for multi-buffer frames. This will allow us to change the mtu while the device is up, without having to re-allocate all ring buffers. Since this is an important change to the driver's rx logic, I have attempted to very carefully test this. Test descriptions are included with each commit message. I invite all interested users of the lan743x to test out these changes, either by testing them out "in the real world", or by repeating my artificial tests. Suggestions for better tests are very welcome. Tree: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git # 46eb3c108fe1 To: Bryan Whitehead <bryan.whiteh...@microchip.com> To: unglinuxdri...@microchip.com To: "David S. Miller" <da...@davemloft.net> To: Jakub Kicinski <k...@kernel.org> Cc: Andrew Lunn <and...@lunn.ch> Cc: Alexey Denisov <rtg...@gmail.com> Cc: Sergej Bauer <sba...@blackbox.su> Cc: Tim Harvey <thar...@gateworks.com> Cc: Anders Rønningen <and...@ronningen.priv.no> Cc: netdev@vger.kernel.org Cc: linux-ker...@vger.kernel.org (open list) Sven Van Asbroeck (6): lan743x: boost performance on cpu archs w/o dma cache snooping lan743x: support rx multi-buffer packets lan743x: allow mtu change while network interface is up TEST ONLY: lan743x: limit rx ring buffer size to 500 bytes TEST ONLY: lan743x: skb_alloc failure test TEST ONLY: lan743x: skb_trim failure test drivers/net/ethernet/microchip/lan743x_main.c | 324 ++++++++---------- drivers/net/ethernet/microchip/lan743x_main.h | 2 + 2 files changed, 152 insertions(+), 174 deletions(-) -- 2.17.1
