Commit 3a0b1713 authored by Jacob Moroni's avatar Jacob Moroni Committed by Leon Romanovsky
Browse files

RDMA/umem: Add helpers for umem dmabuf revoke lock 



Added helpers to acquire and release the umem dmabuf revoke
lock. The intent is to avoid the need for drivers to peek
into the ib_umem_dmabuf internals to get the dma_resv_lock
and bring us one step closer to abstracting ib_umem_dmabuf
away from drivers in general.

Signed-off-by: default avatarJacob Moroni <jmoroni@google.com>
Link: https://patch.msgid.link/20260305170826.3803155-5-jmoroni@google.com


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent ff85a2eb

drivers/infiniband/core/umem_dmabuf.c

+16 −0
Original line number Diff line number Diff line
@@ -334,6 +334,22 @@ struct ib_umem_dmabuf *ib_umem_dmabuf_get_pinned(struct ib_device *device, 
}

EXPORT_SYMBOL(ib_umem_dmabuf_get_pinned);



void ib_umem_dmabuf_revoke_lock(struct ib_umem_dmabuf *umem_dmabuf)

{

	struct dma_buf *dmabuf = umem_dmabuf->attach->dmabuf;



	dma_resv_lock(dmabuf->resv, NULL);

}

EXPORT_SYMBOL(ib_umem_dmabuf_revoke_lock);



void ib_umem_dmabuf_revoke_unlock(struct ib_umem_dmabuf *umem_dmabuf)

{

	struct dma_buf *dmabuf = umem_dmabuf->attach->dmabuf;



	dma_resv_unlock(dmabuf->resv);

}

EXPORT_SYMBOL(ib_umem_dmabuf_revoke_unlock);



void ib_umem_dmabuf_revoke(struct ib_umem_dmabuf *umem_dmabuf)

{

	struct dma_buf *dmabuf = umem_dmabuf->attach->dmabuf;

include/rdma/ib_umem.h

+4 −0
Original line number Diff line number Diff line
@@ -151,6 +151,8 @@ 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_lock(struct ib_umem_dmabuf *umem_dmabuf);

void ib_umem_dmabuf_revoke_unlock(struct ib_umem_dmabuf *umem_dmabuf);

void ib_umem_dmabuf_revoke(struct ib_umem_dmabuf *umem_dmabuf);



#else /* CONFIG_INFINIBAND_USER_MEM */
@@ -223,6 +225,8 @@ 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_lock(struct ib_umem_dmabuf *umem_dmabuf) {}

static inline void ib_umem_dmabuf_revoke_unlock(struct ib_umem_dmabuf *umem_dmabuf) {}

static inline void ib_umem_dmabuf_revoke(struct ib_umem_dmabuf *umem_dmabuf) {}



#endif /* CONFIG_INFINIBAND_USER_MEM */