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| author | Chengchang Tang <tangchengchang@huawei.com> | 2024-09-27 18:33:22 +0800 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2024-10-07 08:53:23 +0300 |
| commit | 51976c6cd786151b6a1bdf8b8b3334beac0ba99c (patch) | |
| tree | 9c4a089bc2931c9000884566f41f81c5f347c855 /include/rdma | |
| parent | 8cf0b93919e13d1e8d4466eb4080a4c4d9d66d7b (diff) | |
| download | linux-51976c6cd786151b6a1bdf8b8b3334beac0ba99c.tar.gz linux-51976c6cd786151b6a1bdf8b8b3334beac0ba99c.tar.bz2 linux-51976c6cd786151b6a1bdf8b8b3334beac0ba99c.zip | |
RDMA/core: Provide rdma_user_mmap_disassociate() to disassociate mmap pages
Provide a new api rdma_user_mmap_disassociate() for drivers to
disassociate mmap pages for a device.
Since drivers can now disassociate mmaps by calling this api,
introduce a new disassociation_lock to specifically prevent
races between this disassociation process and new mmaps. And
thus the old hw_destroy_rwsem is not needed in this api.
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://patch.msgid.link/20240927103323.1897094-2-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'include/rdma')
| -rw-r--r-- | include/rdma/ib_verbs.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index aa8ede439905..9cb8b5fe7eee 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -2948,6 +2948,14 @@ int rdma_user_mmap_entry_insert_range(struct ib_ucontext *ucontext, size_t length, u32 min_pgoff, u32 max_pgoff); +#if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS) +void rdma_user_mmap_disassociate(struct ib_device *device); +#else +static inline void rdma_user_mmap_disassociate(struct ib_device *device) +{ +} +#endif + static inline int rdma_user_mmap_entry_insert_exact(struct ib_ucontext *ucontext, struct rdma_user_mmap_entry *entry, |