IB/mlx5: When in switchdev mode, expose only raw packet capabilities

Currently in switchdev mode we allow only for raw packet QPs.
Expose the right capabilities and set the gid table length to 0, also
make sure we don't try to enable RoCE, so split the function
to enable RoCE so representors can enable only the notifier needed for
net device events.
Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/infiniband/hw/mlx5/main.c

@@ -131,7 +131,7 @@ static int get_port_state(struct ib_device *ibdev,
 	int ret;
 
 	memset(&attr, 0, sizeof(attr));
-	ret = mlx5_ib_query_port(ibdev, port_num, &attr);
+	ret = ibdev->query_port(ibdev, port_num, &attr);
 	if (!ret)
 		*state = attr.state;
 	return ret;
@@ -1278,6 +1278,22 @@ int mlx5_ib_query_port(struct ib_device *ibdev, u8 port,
 	return ret;
 }
 
+static int mlx5_ib_rep_query_port(struct ib_device *ibdev, u8 port,
+				  struct ib_port_attr *props)
+{
+	int ret;
+
+	/* Only link layer == ethernet is valid for representors */
+	ret = mlx5_query_port_roce(ibdev, port, props);
+	if (ret || !props)
+		return ret;
+
+	/* We don't support GIDS */
+	props->gid_tbl_len = 0;
+
+	return ret;
+}
+
 static int mlx5_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 			     union ib_gid *gid)
 {
@@ -3794,6 +3810,25 @@ static int mlx5_port_immutable(struct ib_device *ibdev, u8 port_num,
 	return 0;
 }
 
+static int mlx5_port_rep_immutable(struct ib_device *ibdev, u8 port_num,
+				   struct ib_port_immutable *immutable)
+{
+	struct ib_port_attr attr;
+	int err;
+
+	immutable->core_cap_flags = RDMA_CORE_PORT_RAW_PACKET;
+
+	err = ib_query_port(ibdev, port_num, &attr);
+	if (err)
+		return err;
+
+	immutable->pkey_tbl_len = attr.pkey_tbl_len;
+	immutable->gid_tbl_len = attr.gid_tbl_len;
+	immutable->core_cap_flags = RDMA_CORE_PORT_RAW_PACKET;
+
+	return 0;
+}
+
 static void get_dev_fw_str(struct ib_device *ibdev, char *str)
 {
 	struct mlx5_ib_dev *dev =
@@ -3870,14 +3905,10 @@ static int mlx5_enable_eth(struct mlx5_ib_dev *dev, u8 port_num)
 {
 	int err;
 
-	err = mlx5_add_netdev_notifier(dev, port_num);
-	if (err)
-		return err;
-
 	if (MLX5_CAP_GEN(dev->mdev, roce)) {
 		err = mlx5_nic_vport_enable_roce(dev->mdev);
 		if (err)
-			goto err_unregister_netdevice_notifier;
+			return err;
 	}
 
 	err = mlx5_eth_lag_init(dev);
@@ -3890,8 +3921,6 @@ static int mlx5_enable_eth(struct mlx5_ib_dev *dev, u8 port_num)
 	if (MLX5_CAP_GEN(dev->mdev, roce))
 		mlx5_nic_vport_disable_roce(dev->mdev);
 
-err_unregister_netdevice_notifier:
-	mlx5_remove_netdev_notifier(dev, port_num);
 	return err;
 }
 
@@ -4664,7 +4693,6 @@ static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev)
 		(1ull << IB_USER_VERBS_EX_CMD_MODIFY_CQ);
 
 	dev->ib_dev.query_device	= mlx5_ib_query_device;
-	dev->ib_dev.query_port		= mlx5_ib_query_port;
 	dev->ib_dev.get_link_layer	= mlx5_ib_port_link_layer;
 	dev->ib_dev.query_gid		= mlx5_ib_query_gid;
 	dev->ib_dev.add_gid		= mlx5_ib_add_gid;
@@ -4707,7 +4735,6 @@ static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev)
 	dev->ib_dev.alloc_mr		= mlx5_ib_alloc_mr;
 	dev->ib_dev.map_mr_sg		= mlx5_ib_map_mr_sg;
 	dev->ib_dev.check_mr_status	= mlx5_ib_check_mr_status;
-	dev->ib_dev.get_port_immutable  = mlx5_port_immutable;
 	dev->ib_dev.get_dev_fw_str      = get_dev_fw_str;
 	dev->ib_dev.get_vector_affinity	= mlx5_ib_get_vector_affinity;
 	if (MLX5_CAP_GEN(mdev, ipoib_enhanced_offloads))
@@ -4758,20 +4785,27 @@ static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev)
 	return 0;
 }
 
-static int mlx5_ib_stage_roce_init(struct mlx5_ib_dev *dev)
+static int mlx5_ib_stage_non_default_cb(struct mlx5_ib_dev *dev)
 {
-	struct mlx5_core_dev *mdev = dev->mdev;
-	enum rdma_link_layer ll;
-	int port_type_cap;
-	u8 port_num;
-	int err;
-	int i;
+	dev->ib_dev.get_port_immutable  = mlx5_port_immutable;
+	dev->ib_dev.query_port		= mlx5_ib_query_port;
 
-	port_num = mlx5_core_native_port_num(dev->mdev) - 1;
-	port_type_cap = MLX5_CAP_GEN(mdev, port_type);
-	ll = mlx5_port_type_cap_to_rdma_ll(port_type_cap);
+	return 0;
+}
+
+static int mlx5_ib_stage_rep_non_default_cb(struct mlx5_ib_dev *dev)
+{
+	dev->ib_dev.get_port_immutable  = mlx5_port_rep_immutable;
+	dev->ib_dev.query_port		= mlx5_ib_rep_query_port;
+
+	return 0;
+}
+
+static int mlx5_ib_stage_common_roce_init(struct mlx5_ib_dev *dev,
+					  u8 port_num)
+{
+	int i;
 
-	if (ll == IB_LINK_LAYER_ETHERNET) {
 	for (i = 0; i < dev->num_ports; i++) {
 		dev->roce[i].dev = dev;
 		dev->roce[i].native_port_num = i + 1;
@@ -4784,18 +4818,74 @@ static int mlx5_ib_stage_roce_init(struct mlx5_ib_dev *dev)
 	dev->ib_dev.destroy_wq	 = mlx5_ib_destroy_wq;
 	dev->ib_dev.create_rwq_ind_table = mlx5_ib_create_rwq_ind_table;
 	dev->ib_dev.destroy_rwq_ind_table = mlx5_ib_destroy_rwq_ind_table;
+
 	dev->ib_dev.uverbs_ex_cmd_mask |=
 			(1ull << IB_USER_VERBS_EX_CMD_CREATE_WQ) |
 			(1ull << IB_USER_VERBS_EX_CMD_MODIFY_WQ) |
 			(1ull << IB_USER_VERBS_EX_CMD_DESTROY_WQ) |
 			(1ull << IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL) |
 			(1ull << IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL);
-		err = mlx5_enable_eth(dev, port_num);
+
+	return mlx5_add_netdev_notifier(dev, port_num);
+}
+
+static void mlx5_ib_stage_common_roce_cleanup(struct mlx5_ib_dev *dev)
+{
+	u8 port_num = mlx5_core_native_port_num(dev->mdev) - 1;
+
+	mlx5_remove_netdev_notifier(dev, port_num);
+}
+
+int mlx5_ib_stage_rep_roce_init(struct mlx5_ib_dev *dev)
+{
+	struct mlx5_core_dev *mdev = dev->mdev;
+	enum rdma_link_layer ll;
+	int port_type_cap;
+	int err = 0;
+	u8 port_num;
+
+	port_num = mlx5_core_native_port_num(dev->mdev) - 1;
+	port_type_cap = MLX5_CAP_GEN(mdev, port_type);
+	ll = mlx5_port_type_cap_to_rdma_ll(port_type_cap);
+
+	if (ll == IB_LINK_LAYER_ETHERNET)
+		err = mlx5_ib_stage_common_roce_init(dev, port_num);
+
+	return err;
+}
+
+void mlx5_ib_stage_rep_roce_cleanup(struct mlx5_ib_dev *dev)
+{
+	mlx5_ib_stage_common_roce_cleanup(dev);
+}
+
+static int mlx5_ib_stage_roce_init(struct mlx5_ib_dev *dev)
+{
+	struct mlx5_core_dev *mdev = dev->mdev;
+	enum rdma_link_layer ll;
+	int port_type_cap;
+	u8 port_num;
+	int err;
+
+	port_num = mlx5_core_native_port_num(dev->mdev) - 1;
+	port_type_cap = MLX5_CAP_GEN(mdev, port_type);
+	ll = mlx5_port_type_cap_to_rdma_ll(port_type_cap);
+
+	if (ll == IB_LINK_LAYER_ETHERNET) {
+		err = mlx5_ib_stage_common_roce_init(dev, port_num);
 		if (err)
 			return err;
+
+		err = mlx5_enable_eth(dev, port_num);
+		if (err)
+			goto cleanup;
 	}
 
 	return 0;
+cleanup:
+	mlx5_ib_stage_common_roce_cleanup(dev);
+
+	return err;
 }
 
 static void mlx5_ib_stage_roce_cleanup(struct mlx5_ib_dev *dev)
@@ -4811,7 +4901,7 @@ static void mlx5_ib_stage_roce_cleanup(struct mlx5_ib_dev *dev)
 
 	if (ll == IB_LINK_LAYER_ETHERNET) {
 		mlx5_disable_eth(dev);
-		mlx5_remove_netdev_notifier(dev, port_num);
+		mlx5_ib_stage_common_roce_cleanup(dev);
 	}
 }
 
@@ -5017,6 +5107,9 @@ static const struct mlx5_ib_profile pf_profile = {
 	STAGE_CREATE(MLX5_IB_STAGE_CAPS,
 		     mlx5_ib_stage_caps_init,
 		     NULL),
+	STAGE_CREATE(MLX5_IB_STAGE_NON_DEFAULT_CB,
+		     mlx5_ib_stage_non_default_cb,
+		     NULL),
 	STAGE_CREATE(MLX5_IB_STAGE_ROCE,
 		     mlx5_ib_stage_roce_init,
 		     mlx5_ib_stage_roce_cleanup),

drivers/infiniband/hw/mlx5/mlx5_ib.h

@@ -733,6 +733,7 @@ enum mlx5_ib_stages {
 	MLX5_IB_STAGE_INIT,
 	MLX5_IB_STAGE_FLOW_DB,
 	MLX5_IB_STAGE_CAPS,
+	MLX5_IB_STAGE_NON_DEFAULT_CB,
 	MLX5_IB_STAGE_ROCE,
 	MLX5_IB_STAGE_DEVICE_RESOURCES,
 	MLX5_IB_STAGE_ODP,