diff options
Diffstat (limited to 'drivers/infiniband/hw/mlx5/fs.h')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/fs.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx5/fs.h b/drivers/infiniband/hw/mlx5/fs.h new file mode 100644 index 000000000..b9734904f --- /dev/null +++ b/drivers/infiniband/hw/mlx5/fs.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ +/* + * Copyright (c) 2013-2020, Mellanox Technologies inc. All rights reserved. + */ + +#ifndef _MLX5_IB_FS_H +#define _MLX5_IB_FS_H + +#include "mlx5_ib.h" + +#if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS) +int mlx5_ib_fs_init(struct mlx5_ib_dev *dev); +void mlx5_ib_fs_cleanup_anchor(struct mlx5_ib_dev *dev); +#else +static inline int mlx5_ib_fs_init(struct mlx5_ib_dev *dev) +{ + dev->flow_db = kzalloc(sizeof(*dev->flow_db), GFP_KERNEL); + + if (!dev->flow_db) + return -ENOMEM; + + mutex_init(&dev->flow_db->lock); + return 0; +} + +inline void mlx5_ib_fs_cleanup_anchor(struct mlx5_ib_dev *dev) {} +#endif + +static inline void mlx5_ib_fs_cleanup(struct mlx5_ib_dev *dev) +{ + /* When a steering anchor is created, a special flow table is also + * created for the user to reference. Since the user can reference it, + * the kernel cannot trust that when the user destroys the steering + * anchor, they no longer reference the flow table. + * + * To address this issue, when a user destroys a steering anchor, only + * the flow steering rule in the table is destroyed, but the table + * itself is kept to deal with the above scenario. The remaining + * resources are only removed when the RDMA device is destroyed, which + * is a safe assumption that all references are gone. + */ + mlx5_ib_fs_cleanup_anchor(dev); + kfree(dev->flow_db); +} +#endif /* _MLX5_IB_FS_H */ |