diff options
| author | Yishai Hadas <yishaih@nvidia.com> | 2024-08-01 14:05:14 +0200 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2024-08-11 10:12:49 +0200 |
| commit | 253c61dc256b3e6be65657f78b4a8452163ce00f (patch) | |
| tree | 8738f45da564c9af3e1d345083df9f730b741287 /include/rdma | |
| parent | RDMA/umem: Add support for creating pinned DMABUF umem with a given dma device (diff) | |
| download | linux-253c61dc256b3e6be65657f78b4a8452163ce00f.tar.xz linux-253c61dc256b3e6be65657f78b4a8452163ce00f.zip | |
RDMA/umem: Introduce an option to revoke DMABUF umem
Introduce an option to revoke DMABUF umem.
This option will retain the umem allocation while revoking its DMA
mapping. Furthermore, any subsequent attempts to map the pages should
fail once the umem has been revoked.
This functionality will be utilized in the upcoming patches in the
series, where we aim to delay umem deallocation until the mkey
deregistration. However, we must unmap its pages immediately.
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://patch.msgid.link/a38270f2fe4a194868ca2312f4c1c760e51bcbff.1722512548.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'include/rdma')
| -rw-r--r-- | include/rdma/ib_umem.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/rdma/ib_umem.h b/include/rdma/ib_umem.h index de05268ed632..7dc7b1cc71b5 100644 --- a/include/rdma/ib_umem.h +++ b/include/rdma/ib_umem.h @@ -38,6 +38,7 @@ struct ib_umem_dmabuf { unsigned long last_sg_trim; void *private; u8 pinned : 1; + u8 revoked : 1; }; static inline struct ib_umem_dmabuf *to_ib_umem_dmabuf(struct ib_umem *umem) @@ -158,6 +159,7 @@ ib_umem_dmabuf_get_pinned_with_dma_device(struct ib_device *device, int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf); void ib_umem_dmabuf_unmap_pages(struct ib_umem_dmabuf *umem_dmabuf); void ib_umem_dmabuf_release(struct ib_umem_dmabuf *umem_dmabuf); +void ib_umem_dmabuf_revoke(struct ib_umem_dmabuf *umem_dmabuf); #else /* CONFIG_INFINIBAND_USER_MEM */ @@ -217,6 +219,7 @@ static inline int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf) } static inline void ib_umem_dmabuf_unmap_pages(struct ib_umem_dmabuf *umem_dmabuf) { } static inline void ib_umem_dmabuf_release(struct ib_umem_dmabuf *umem_dmabuf) { } +static inline void ib_umem_dmabuf_revoke(struct ib_umem_dmabuf *umem_dmabuf) {} #endif /* CONFIG_INFINIBAND_USER_MEM */ #endif /* IB_UMEM_H */ |