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From: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
To: intel-wired-lan@lists.osuosl.org
Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, davem@davemloft.net,
	anthony.l.nguyen@intel.com, kuba@kernel.org, bjorn@kernel.org,
	magnus.karlsson@intel.com, joamaki@gmail.com, toke@redhat.com,
	Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Subject: [PATCH v2 intel-next 3/4] ice: do not create xdp_frame on XDP_TX
Date: Mon,  5 Jul 2021 18:43:37 +0200	[thread overview]
Message-ID: <20210705164338.58313-4-maciej.fijalkowski@intel.com> (raw)
In-Reply-To: <20210705164338.58313-1-maciej.fijalkowski@intel.com>

xdp_frame is not needed for XDP_TX data path in ice driver case.
For this data path cleaning of sent descriptor will not happen anywhere
outside of the driver, which means that carrying the information about
the underlying memory model via xdp_frame will not be used. Therefore,
this conversion can be simply dropped, which would relieve CPU a bit.

Call directly ice_xmit_xdp_ring instead of ice_xmit_xdp_buff for XDP_TX
action returned from BPF program.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c
index 23b97c9579fb..fef1f74562e5 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.c
@@ -586,7 +586,7 @@ ice_run_xdp(struct ice_ring *rx_ring, struct xdp_buff *xdp,
 		return ICE_XDP_PASS;
 	case XDP_TX:
 		xdp_ring = rx_ring->vsi->xdp_rings[smp_processor_id()];
-		result = ice_xmit_xdp_buff(xdp, xdp_ring);
+		result = ice_xmit_xdp_ring(xdp->data, xdp->data_end - xdp->data, xdp_ring);
 		if (result == ICE_XDP_CONSUMED)
 			goto out_failure;
 		return result;
-- 
2.20.1


  parent reply	other threads:[~2021-07-05 16:58 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-05 16:43 [PATCH v2 intel-next 0/4] XDP_TX improvements for ice Maciej Fijalkowski
2021-07-05 16:43 ` [PATCH v2 intel-next 1/4] ice: unify xdp_rings accesses Maciej Fijalkowski
2021-07-05 16:43 ` [PATCH v2 intel-next 2/4] ice: optimize XDP_TX descriptor processing Maciej Fijalkowski
2021-07-05 16:43 ` Maciej Fijalkowski [this message]
2021-07-05 16:43 ` [PATCH v2 intel-next 4/4] ice: introduce XDP_TX fallback path Maciej Fijalkowski
2021-07-05 17:06 ` [PATCH v2 intel-next 0/4] XDP_TX improvements for ice Toke Høiland-Jørgensen

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