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| author | Jason Gunthorpe <jgg@mellanox.com> | 2019-08-19 14:17:01 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-08-21 14:08:42 -0300 |
| commit | fd7dbf035edcfb035977423e2a5102832c1427f4 (patch) | |
| tree | 6b3db77ec053e94fed95479569088d38e2e64bc8 /include | |
| parent | f993de88a55f2dd56f17248d06c0dfda9a9799db (diff) | |
| download | linux-fd7dbf035edcfb035977423e2a5102832c1427f4.tar.bz2 | |
RDMA/odp: Make it clearer when a umem is an implicit ODP umem
Implicit ODP umems are special, they don't have any page lists, they don't
exist in the interval tree and they are never DMA mapped.
Instead of trying to guess this based on a zero length use an explicit
flag.
Further, do not allow non-implicit umems to be 0 size.
Link: https://lore.kernel.org/r/20190819111710.18440-4-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/rdma/ib_umem_odp.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/rdma/ib_umem_odp.h b/include/rdma/ib_umem_odp.h index 030d5cbad02c..14b38b4459c5 100644 --- a/include/rdma/ib_umem_odp.h +++ b/include/rdma/ib_umem_odp.h @@ -69,6 +69,14 @@ struct ib_umem_odp { /* Tree tracking */ struct interval_tree_node interval_tree; + /* + * An implicit odp umem cannot be DMA mapped, has 0 length, and serves + * only as an anchor for the driver to hold onto the per_mm. FIXME: + * This should be removed and drivers should work with the per_mm + * directly. + */ + bool is_implicit_odp; + struct completion notifier_completion; int dying; unsigned int page_shift; |