IB/core: Add umem function to read data from user-space

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In some drivers there's a need to read data from a user space area
that was pinned using ib_umem when running from a different process
context.

The ib_umem_copy_from function allows reading data from the physical
pages pinned in the ib_umem struct.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

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Haggai Eran 2014-12-11 17:04:13 +02:00 • committed by Roland Dreier

parent 406f9e5fa9

commit c5d76f130b

2 changed files with 36 additions and 0 deletions

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34

drivers/infiniband/core/umem.c

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2

include/rdma/ib_umem.h

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