idpf: add XDP RSS hash hint

Add &xdp_metadata_ops with a callback to get RSS hash hint from the
descriptor. Declare the splitq 32-byte descriptor as 4 u64s to parse
them more efficiently when possible.

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>

1 files changed, 27 insertions, 1 deletions

diff --git a/drivers/net/ethernet/intel/idpf/xdp.c b/drivers/net/ethernet/intel/idpf/xdp.c
index b6a8304d61f9..89d5735f42f2 100644
--- a/drivers/net/ethernet/intel/idpf/xdp.c
+++ b/drivers/net/ethernet/intel/idpf/xdp.c
@@ -342,12 +342,38 @@ int idpf_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
 				       idpf_xdp_tx_finalize);
 }
 
+static int idpf_xdpmo_rx_hash(const struct xdp_md *ctx, u32 *hash,
+			      enum xdp_rss_hash_type *rss_type)
+{
+	const struct libeth_xdp_buff *xdp = (typeof(xdp))ctx;
+	struct idpf_xdp_rx_desc desc __uninitialized;
+	const struct idpf_rx_queue *rxq;
+	struct libeth_rx_pt pt;
+
+	rxq = libeth_xdp_buff_to_rq(xdp, typeof(*rxq), xdp_rxq);
+
+	idpf_xdp_get_qw0(&desc, xdp->desc);
+
+	pt = rxq->rx_ptype_lkup[idpf_xdp_rx_pt(&desc)];
+	if (!libeth_rx_pt_has_hash(rxq->xdp_rxq.dev, pt))
+		return -ENODATA;
+
+	idpf_xdp_get_qw2(&desc, xdp->desc);
+
+	return libeth_xdpmo_rx_hash(hash, rss_type, idpf_xdp_rx_hash(&desc),
+				    pt);
+}
+
+static const struct xdp_metadata_ops idpf_xdpmo = {
+	.xmo_rx_hash		= idpf_xdpmo_rx_hash,
+};
+
 void idpf_xdp_set_features(const struct idpf_vport *vport)
 {
 	if (!idpf_is_queue_model_split(vport->rxq_model))
 		return;
 
-	libeth_xdp_set_features_noredir(vport->netdev);
+	libeth_xdp_set_features_noredir(vport->netdev, &idpf_xdpmo);
 }
 
 static int idpf_xdp_setup_prog(struct idpf_vport *vport,