RDMA/mlx5: Add other eswitch support to userspace tables

Allows the creation of RDMA TRANSPORT tables over VFs/SFs that
belong to another eswitch manager. Which is only possible for PFs that
were connected via a create_lag PRM command.

Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Signed-off-by: Edward Srouji <edwards@nvidia.com>
Link: https://patch.msgid.link/20251029-support-other-eswitch-v1-7-98bb707b5d57@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/hw/mlx5/fs.c b/drivers/infiniband/hw/mlx5/fs.c
index c8a25370aa7997ad9853617e3a8c6783ec0ad321..d17823ce7f384e50bab5c6019a469e6b4e565057 100644 (file)
--- a/drivers/infiniband/hw/mlx5/fs.c
+++ b/drivers/infiniband/hw/mlx5/fs.c
@@ -1874,7 +1874,7 @@ static int mlx5_ib_fill_transport_ns_info(struct mlx5_ib_dev *dev,
                                          u32 *flags, u16 *vport_idx,
                                          u16 *vport,
                                          struct mlx5_core_dev **ft_mdev,
-                                         u32 ib_port)
+                                         u32 ib_port, u16 *esw_owner_vhca_id)
 {
        struct mlx5_core_dev *esw_mdev;
 
@@ -1888,8 +1888,13 @@ static int mlx5_ib_fill_transport_ns_info(struct mlx5_ib_dev *dev,
                return -EINVAL;
 
        esw_mdev = mlx5_eswitch_get_core_dev(dev->port[ib_port - 1].rep->esw);
-       if (esw_mdev != dev->mdev)
-               return -EOPNOTSUPP;
+       if (esw_mdev != dev->mdev) {
+               if (!MLX5_CAP_ADV_RDMA(dev->mdev,
+                                      rdma_transport_manager_other_eswitch))
+                       return -EOPNOTSUPP;
+               *flags |= MLX5_FLOW_TABLE_OTHER_ESWITCH;
+               *esw_owner_vhca_id = MLX5_CAP_GEN(esw_mdev, vhca_id);
+       }
 
        *flags |= MLX5_FLOW_TABLE_OTHER_VPORT;
        *ft_mdev = esw_mdev;
@@ -1908,6 +1913,7 @@ _get_flow_table(struct mlx5_ib_dev *dev, u16 user_priority,
        struct mlx5_flow_table_attr ft_attr = {};
        struct mlx5_flow_namespace *ns = NULL;
        struct mlx5_ib_flow_prio *prio = NULL;
+       u16 esw_owner_vhca_id = 0;
        int max_table_size = 0;
        u16 vport_idx = 0;
        bool esw_encap;
@@ -1969,7 +1975,8 @@ _get_flow_table(struct mlx5_ib_dev *dev, u16 user_priority,
                        return ERR_PTR(-EINVAL);
                ret = mlx5_ib_fill_transport_ns_info(dev, ns_type, &flags,
                                                     &vport_idx, &vport,
-                                                    &ft_mdev, ib_port);
+                                                    &ft_mdev, ib_port,
+                                                    &esw_owner_vhca_id);
                if (ret)
                        return ERR_PTR(ret);
 
@@ -2033,6 +2040,7 @@ _get_flow_table(struct mlx5_ib_dev *dev, u16 user_priority,
        ft_attr.max_fte = max_table_size;
        ft_attr.flags = flags;
        ft_attr.vport = vport;
+       ft_attr.esw_owner_vhca_id = esw_owner_vhca_id;
        ft_attr.autogroup.max_num_groups = MLX5_FS_MAX_TYPES;
        return _get_prio(ns, prio, &ft_attr);
 }