net/mlx5e: IPoIB, Move underlay QP init/uninit to separate functions

During the creation of the underlay QP the PKEY index is unknown, the
PKEY index is known only when calling ndo_open.
PKEY index attached to the QP during state modification.

Splitting the functions will also make the code symmetric and more
readable. This split is also required for later PKEY support to be
called with the PKEY index during ndo_open.
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c

@@ -108,11 +108,68 @@ static void mlx5i_cleanup(struct mlx5e_priv *priv)
 	/* Do nothing .. */
 }
 
+static int mlx5i_init_underlay_qp(struct mlx5e_priv *priv)
+{
+	struct mlx5_core_dev *mdev = priv->mdev;
+	struct mlx5i_priv *ipriv = priv->ppriv;
+	struct mlx5_core_qp *qp = &ipriv->qp;
+	struct mlx5_qp_context *context;
+	int ret;
+
+	/* QP states */
+	context = kzalloc(sizeof(*context), GFP_KERNEL);
+	if (!context)
+		return -ENOMEM;
+
+	context->flags = cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
+	context->pri_path.port = 1;
+	context->qkey = cpu_to_be32(IB_DEFAULT_Q_KEY);
+
+	ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RST2INIT_QP, 0, context, qp);
+	if (ret) {
+		mlx5_core_err(mdev, "Failed to modify qp RST2INIT, err: %d\n", ret);
+		goto err_qp_modify_to_err;
+	}
+	memset(context, 0, sizeof(*context));
+
+	ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_INIT2RTR_QP, 0, context, qp);
+	if (ret) {
+		mlx5_core_err(mdev, "Failed to modify qp INIT2RTR, err: %d\n", ret);
+		goto err_qp_modify_to_err;
+	}
+
+	ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RTR2RTS_QP, 0, context, qp);
+	if (ret) {
+		mlx5_core_err(mdev, "Failed to modify qp RTR2RTS, err: %d\n", ret);
+		goto err_qp_modify_to_err;
+	}
+
+	kfree(context);
+	return 0;
+
+err_qp_modify_to_err:
+	mlx5_core_qp_modify(mdev, MLX5_CMD_OP_2ERR_QP, 0, &context, qp);
+	kfree(context);
+	return ret;
+}
+
+static void mlx5i_uninit_underlay_qp(struct mlx5e_priv *priv)
+{
+	struct mlx5i_priv *ipriv = priv->ppriv;
+	struct mlx5_core_dev *mdev = priv->mdev;
+	struct mlx5_qp_context context;
+	int err;
+
+	err = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_2RST_QP, 0, &context,
+				  &ipriv->qp);
+	if (err)
+		mlx5_core_err(mdev, "Failed to modify qp 2RST, err: %d\n", err);
+}
+
 #define MLX5_QP_ENHANCED_ULP_STATELESS_MODE 2
 
 static int mlx5i_create_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp)
 {
-	struct mlx5_qp_context *context = NULL;
 	u32 *in = NULL;
 	void *addr_path;
 	int ret = 0;
@@ -140,38 +197,7 @@ static int mlx5i_create_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core
 		goto out;
 	}
 
-	/* QP states */
-	context = kzalloc(sizeof(*context), GFP_KERNEL);
-	if (!context) {
-		ret = -ENOMEM;
-		goto out;
-	}
-
-	context->flags = cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
-	context->pri_path.port = 1;
-	context->qkey = cpu_to_be32(IB_DEFAULT_Q_KEY);
-
-	ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RST2INIT_QP, 0, context, qp);
-	if (ret) {
-		mlx5_core_err(mdev, "Failed to modify qp RST2INIT, err: %d\n", ret);
-		goto out;
-	}
-	memset(context, 0, sizeof(*context));
-
-	ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_INIT2RTR_QP, 0, context, qp);
-	if (ret) {
-		mlx5_core_err(mdev, "Failed to modify qp INIT2RTR, err: %d\n", ret);
-		goto out;
-	}
-
-	ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RTR2RTS_QP, 0, context, qp);
-	if (ret) {
-		mlx5_core_err(mdev, "Failed to modify qp RTR2RTS, err: %d\n", ret);
-		goto out;
-	}
-
 out:
-	kfree(context);
 	kvfree(in);
 	return ret;
 }
@@ -192,13 +218,23 @@ static int mlx5i_init_tx(struct mlx5e_priv *priv)
 		return err;
 	}
 
+	err = mlx5i_init_underlay_qp(priv);
+	if (err) {
+		mlx5_core_warn(priv->mdev, "intilize underlay QP failed, %d\n", err);
+		goto err_destroy_underlay_qp;
+	}
+
 	err = mlx5e_create_tis(priv->mdev, 0 /* tc */, ipriv->qp.qpn, &priv->tisn[0]);
 	if (err) {
 		mlx5_core_warn(priv->mdev, "create tis failed, %d\n", err);
-		return err;
+		goto err_destroy_underlay_qp;
 	}
 
 	return 0;
+
+err_destroy_underlay_qp:
+	mlx5i_destroy_underlay_qp(priv->mdev, &ipriv->qp);
+	return err;
 }
 
 static void mlx5i_cleanup_tx(struct mlx5e_priv *priv)
@@ -381,12 +417,8 @@ static int mlx5i_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 static void mlx5i_dev_cleanup(struct net_device *dev)
 {
 	struct mlx5e_priv    *priv   = mlx5i_epriv(dev);
-	struct mlx5_core_dev *mdev   = priv->mdev;
-	struct mlx5i_priv    *ipriv  = priv->ppriv;
-	struct mlx5_qp_context context;
 
-	/* detach qp from flow-steering by reset it */
-	mlx5_core_qp_modify(mdev, MLX5_CMD_OP_2RST_QP, 0, &context, &ipriv->qp);
+	mlx5i_uninit_underlay_qp(priv);
 }
 
 static int mlx5i_open(struct net_device *netdev)