ice, xsk: Terminate Rx side of NAPI when XSK Rx queue gets full

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When XSK pool uses need_wakeup feature, correlate -ENOBUFS that was
returned from xdp_do_redirect() with a XSK Rx queue being full. In such
case, terminate the Rx processing that is being done on the current HW
Rx ring and let the user space consume descriptors from XSK Rx queue so
that there is room that driver can use later on.

Introduce new internal return code ICE_XDP_EXIT that will indicate case
described above.

Note that it does not affect Tx processing that is bound to the same
NAPI context, nor the other Rx rings.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220413153015.453864-6-maciej.fijalkowski@intel.com

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This commit is contained in:

Maciej Fijalkowski 2022-04-13 17:30:06 +02:00 • committed by Daniel Borkmann

parent d090c88586

commit 50ae066480

2 changed files with 20 additions and 10 deletions

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1

drivers/net/ethernet/intel/ice/ice_txrx.h

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29

drivers/net/ethernet/intel/ice/ice_xsk.c

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