netdev - [PATCH net-next v6 2/2] net/mlx5e: add mlx5e_rep_indr_setup_ft

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Message-Id: <1585061059-6591-3-git-send-email-wenxu@ucloud.cn>
Date:   Tue, 24 Mar 2020 22:44:19 +0800
From:   wenxu@...oud.cn
To:     saeedm@...lanox.com
Cc:     paulb@...lanox.com, vladbu@...lanox.com, netdev@...r.kernel.org
Subject: [PATCH net-next v6 2/2] net/mlx5e: add mlx5e_rep_indr_setup_ft_cb support

From: wenxu <wenxu@...oud.cn>

Add mlx5e_rep_indr_setup_ft_cb to support indr block setup
in FT mode. 
Both tc rules and flow table rules are of the same format,
It can re-use tc parsing for that, and move the flow table rules
to their steering domain(the specific chain_index), the indr
block offload in FT also follow this scenario.

Signed-off-by: wenxu <wenxu@...oud.cn>
---
v6: modify the comments

 drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 52 ++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 057f5f9..30c81c3 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -732,6 +732,55 @@ static int mlx5e_rep_indr_setup_tc_cb(enum tc_setup_type type,
 	}
 }
 
+static int mlx5e_rep_indr_setup_ft_cb(enum tc_setup_type type,
+				      void *type_data, void *indr_priv)
+{
+	struct mlx5e_rep_indr_block_priv *priv = indr_priv;
+	struct flow_cls_offload *f = type_data;
+	struct flow_cls_offload tmp;
+	struct mlx5e_priv *mpriv;
+	struct mlx5_eswitch *esw;
+	unsigned long flags;
+	int err;
+
+	mpriv = netdev_priv(priv->rpriv->netdev);
+	esw = mpriv->mdev->priv.eswitch;
+
+	flags = MLX5_TC_FLAG(EGRESS) |
+		MLX5_TC_FLAG(ESW_OFFLOAD) |
+		MLX5_TC_FLAG(FT_OFFLOAD);
+
+	switch (type) {
+	case TC_SETUP_CLSFLOWER:
+		memcpy(&tmp, f, sizeof(*f));
+
+		if (!mlx5_esw_chains_prios_supported(esw))
+			return -EOPNOTSUPP;
+
+		/* Re-use tc offload path by moving the ft flow to the
+		 * reserved ft chain.
+		 *
+		 * FT offload can use prio range [0, INT_MAX], so we normalize
+		 * it to range [1, mlx5_esw_chains_get_prio_range(esw)]
+		 * as with tc, where prio 0 isn't supported.
+		 *
+		 * We only support chain 0 of FT offload.
+		 */
+		if (tmp.common.prio >= mlx5_esw_chains_get_prio_range(esw))
+			return -EOPNOTSUPP;
+		if (tmp.common.chain_index != 0)
+			return -EOPNOTSUPP;
+
+		tmp.common.chain_index = mlx5_esw_chains_get_ft_chain(esw);
+		tmp.common.prio++;
+		err = mlx5e_rep_indr_offload(priv->netdev, &tmp, priv, flags);
+		memcpy(&f->stats, &tmp.stats, sizeof(f->stats));
+		return err;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
 static void mlx5e_rep_indr_block_unbind(void *cb_priv)
 {
 	struct mlx5e_rep_indr_block_priv *indr_priv = cb_priv;
@@ -809,6 +858,9 @@ int mlx5e_rep_indr_setup_cb(struct net_device *netdev, void *cb_priv,
 	case TC_SETUP_BLOCK:
 		return mlx5e_rep_indr_setup_block(netdev, cb_priv, type_data,
 						  mlx5e_rep_indr_setup_tc_cb);
+	case TC_SETUP_FT:
+		return mlx5e_rep_indr_setup_block(netdev, cb_priv, type_data,
+						  mlx5e_rep_indr_setup_ft_cb);
 	default:
 		return -EOPNOTSUPP;
 	}
-- 
1.8.3.1