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idpf: add support for .ndo_xdp_xmit()

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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>
Tested-by: Ramu R <ramu.r@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Alexander Lobakin 2025-08-26 17:55:06 +02:00 committed by Tony Nguyen
parent cba102cd71
commit aaa3ac6480
3 changed files with 23 additions and 0 deletions
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1
drivers/net/ethernet/intel/idpf/idpf_lib.c
View File

@ -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,
};

20
drivers/net/ethernet/intel/idpf/xdp.c
View File

@ -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
drivers/net/ethernet/intel/idpf/xdp.h
View File

@ -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_ */