gve: Rx Buffer Recycling

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This patch lets the driver reuse buffers that have been freed by the
networking stack.

In the raw addressing case, this allows the driver avoid allocating new
buffers.
In the qpl case, the driver can avoid copies.

This patch separates the page refcount tracking mechanism
into a function gve_rx_can_recycle_buffer which uses get_page - this will
be changed in a future patch to entirely eliminate the use of get_page in
tracking page refcounts.

Signed-off-by: David Awogbemila <awogbemila@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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David Awogbemila 2020-12-07 14:45:25 -08:00 • committed by David S. Miller

parent ede3fcf5ec

commit 02b0e0c18b

2 changed files with 135 additions and 74 deletions

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10

drivers/net/ethernet/google/gve/gve.h

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201

drivers/net/ethernet/google/gve/gve_rx.c

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