net: socionext: different approach on DMA

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Current driver dynamically allocates an skb and maps it as DMA Rx
buffer. In order to prepare for upcoming XDP changes, let's introduce a
different allocation scheme.
Buffers are allocated dynamically and mapped into hardware.
During the Rx operation the driver uses build_skb() to produce the
necessary buffers for the network stack.
This change increases performance ~15% on 64b packets with smmu disabled
and ~5% with smmu enabled

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Ilias Apalodimas 2018-11-08 17:19:54 +02:00 • committed by David S. Miller

parent 026b907d58

commit 4acb20b462

1 changed files with 128 additions and 99 deletions

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drivers/net/ethernet/socionext/netsec.c

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