46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/* 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 */
|