github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-28 01:55:51 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

net: fec: transmit XDP frames in bulk

Browse Source 
Currently, the driver writes the ENET_TDAR register for every XDP frame
to trigger transmit start. Frequent MMIO writes consume more CPU cycles
and may reduce XDP TX performance, so transmit XDP frames in bulk.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260205085742.2685134-9-wei.fang@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Wei Fang 2026-02-05 16:57:35 +08:00 committed by Paolo Abeni
parent 8a3344bb73
commit 2ff7a7d392
1 changed files with 9 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/ethernet/freescale/fec_main.c
View File

@ -2006,6 +2006,8 @@ static int fec_enet_rx_queue_xdp(struct fec_enet_private *fep, int queue,
rxq->stats[RX_XDP_TX_ERRORS]++;
fec_xdp_drop(rxq, &xdp, sync);
trace_xdp_exception(ndev, prog, XDP_TX);
} else {
xdp_res |= FEC_ENET_XDP_TX;
}
break;
default:
@ -2056,6 +2058,10 @@ static int fec_enet_rx_queue_xdp(struct fec_enet_private *fep, int queue,
if (xdp_res & FEC_ENET_XDP_REDIR)
xdp_do_flush();
if (xdp_res & FEC_ENET_XDP_TX)
/* Trigger transmission start */
fec_txq_trigger_xmit(fep, fep->tx_queue[tx_qid]);
return pkt_received;
}
@ -4037,9 +4043,6 @@ static int fec_enet_txq_xmit_frame(struct fec_enet_private *fep,
txq->bd.cur = bdp;
/* Trigger transmission start */
fec_txq_trigger_xmit(fep, txq);
return 0;
}
@ -4089,6 +4092,9 @@ static int fec_enet_xdp_xmit(struct net_device *dev,
sent_frames++;
}
if (sent_frames)
fec_txq_trigger_xmit(fep, txq);
__netif_tx_unlock(nq);
return sent_frames;