[PATCH iwl-next v5 12/13] idpf: add support for .ndo_xdp_xmit()
From: Alexander Lobakin <aleksander.lobakin@intel.com>
Date: 2025-08-26 16:14:21
Also in:
bpf, intel-wired-lan, lkml
Subsystem:
intel ethernet drivers, networking drivers, the rest, xdp (express data path) · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Alexei Starovoitov, Daniel Borkmann, Jesper Dangaard Brouer, John Fastabend
Use libeth XDP infra to implement .ndo_xdp_xmit() in idpf. The Tx callbacks are reused from XDP_TX code. XDP redirect target feature is set/cleared depending on the XDP prog presence, as for now we still don't allocate XDP Tx queues when there's no program. Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com> --- drivers/net/ethernet/intel/idpf/xdp.h | 2 ++ drivers/net/ethernet/intel/idpf/idpf_lib.c | 1 + drivers/net/ethernet/intel/idpf/xdp.c | 20 ++++++++++++++++++++ 3 files changed, 23 insertions(+)
diff --git a/drivers/net/ethernet/intel/idpf/xdp.h b/drivers/net/ethernet/intel/idpf/xdp.h
index 986156162e2d..db8ecc1843fe 100644
--- a/drivers/net/ethernet/intel/idpf/xdp.h
+++ b/drivers/net/ethernet/intel/idpf/xdp.h@@ -102,5 +102,7 @@ static inline void idpf_xdp_tx_finalize(void *_xdpsq, bool sent, bool flush) void idpf_xdp_set_features(const struct idpf_vport *vport); int idpf_xdp(struct net_device *dev, struct netdev_bpf *xdp); +int idpf_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, + u32 flags); #endif /* _IDPF_XDP_H_ */
diff --git a/drivers/net/ethernet/intel/idpf/idpf_lib.c b/drivers/net/ethernet/intel/idpf/idpf_lib.c
index 1c62998cc0e7..6bf563fa0966 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_lib.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_lib.c@@ -2612,4 +2612,5 @@ static const struct net_device_ops idpf_netdev_ops = { .ndo_hwtstamp_get = idpf_hwtstamp_get, .ndo_hwtstamp_set = idpf_hwtstamp_set, .ndo_bpf = idpf_xdp, + .ndo_xdp_xmit = idpf_xdp_xmit, };
diff --git a/drivers/net/ethernet/intel/idpf/xdp.c b/drivers/net/ethernet/intel/idpf/xdp.c
index e6b45df95cd3..b6a8304d61f9 100644
--- a/drivers/net/ethernet/intel/idpf/xdp.c
+++ b/drivers/net/ethernet/intel/idpf/xdp.c@@ -322,8 +322,26 @@ LIBETH_XDP_DEFINE_START(); LIBETH_XDP_DEFINE_TIMER(static idpf_xdp_tx_timer, idpf_xdpsq_complete); LIBETH_XDP_DEFINE_FLUSH_TX(idpf_xdp_tx_flush_bulk, idpf_xdp_tx_prep, idpf_xdp_tx_xmit); +LIBETH_XDP_DEFINE_FLUSH_XMIT(static idpf_xdp_xmit_flush_bulk, idpf_xdp_tx_prep, + idpf_xdp_tx_xmit); LIBETH_XDP_DEFINE_END(); +int idpf_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, + u32 flags) +{ + const struct idpf_netdev_priv *np = netdev_priv(dev); + const struct idpf_vport *vport = np->vport; + + if (unlikely(!netif_carrier_ok(dev) || !vport->link_up)) + return -ENETDOWN; + + return libeth_xdp_xmit_do_bulk(dev, n, frames, flags, + &vport->txqs[vport->xdp_txq_offset], + vport->num_xdp_txq, + idpf_xdp_xmit_flush_bulk, + idpf_xdp_tx_finalize); +} + void idpf_xdp_set_features(const struct idpf_vport *vport) { if (!idpf_is_queue_model_split(vport->rxq_model))
@@ -378,6 +396,8 @@ static int idpf_xdp_setup_prog(struct idpf_vport *vport, if (old) bpf_prog_put(old); + libeth_xdp_set_redirect(vport->netdev, vport->xdp_prog); + return ret; }
--
2.51.0