RDMA/umem: Allow pinned dmabuf umem usage

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Introduce ib_umem_dmabuf_get_pinned() which allows the driver to get a
dmabuf umem which is pinned and does not require move_notify callback
implementation.

The returned umem is pinned and DMA mapped like standard cpu umems, and is
released through ib_umem_release() (incl. unpinning and unmapping).

Link: https://lore.kernel.org/r/20211012120903.96933-3-galpress@amazon.com
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Gal Pressman 2021-10-12 15:09:02 +03:00 • committed by Jason Gunthorpe

parent 5460601de5

commit 1e4df4a21c

2 changed files with 62 additions and 0 deletions

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51

drivers/infiniband/core/umem_dmabuf.c

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11

include/rdma/ib_umem.h

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