ionic: implement Rx page reuse

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Rework the Rx buffer allocations to use pages twice when using
normal MTU in order to cut down on buffer allocation and mapping
overhead.

Instead of tracking individual pages, in which we may have
wasted half the space when using standard 1500 MTU, we track
buffers which use half pages, so we can use the second half
of the page rather than allocate and map a new page once the
first buffer has been used.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Shannon Nelson 2021-03-10 11:26:27 -08:00 • committed by David S. Miller

parent 2b5720f269

commit 4b0a7539a3

2 changed files with 138 additions and 89 deletions

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12

drivers/net/ethernet/pensando/ionic/ionic_dev.h

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221

drivers/net/ethernet/pensando/ionic/ionic_txrx.c

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