Commit aaa3ac64 authored by Alexander Lobakin's avatar Alexander Lobakin Committed by Tony Nguyen
Browse files

idpf: add support for .ndo_xdp_xmit() 



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: default avatarMaciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: default avatarAlexander Lobakin <aleksander.lobakin@intel.com>
Tested-by: default avatarRamu R <ramu.r@intel.com>
Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
parent cba102cd

drivers/net/ethernet/intel/idpf/idpf_lib.c

+1 −0
Original line number Diff line number Diff line
@@ -2617,4 +2617,5 @@ 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,

};

drivers/net/ethernet/intel/idpf/xdp.c

+20 −0
Original line number Diff line number Diff line
@@ -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;

}

drivers/net/ethernet/intel/idpf/xdp.h

+2 −0
Original line number Diff line number Diff line
@@ -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_ */