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| author |   Jack Morgenstein <jackm@dev.mellanox.co.il> | 2018-05-23 15:30:30 +0300 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2018-05-28 11:41:39 -0600 |
| commit | 08bb558ac11ab944e0539e78619d7b4c356278bd (patch) | |
| tree | 41e3c9c3d0d3bc2a3c764765568c4f711d067403 /include/rdma/ib_verbs.h | |
| parent | RDMA/hns: Move the location for initializing tmp_len (diff) | |
| download | linux-dev-08bb558ac11ab944e0539e78619d7b4c356278bd.tar.xz linux-dev-08bb558ac11ab944e0539e78619d7b4c356278bd.zip | |
IB/core: Make testing MR flags for writability a static inline function
Make the MR writability flags check, which is performed in umem.c,
a static inline function in file ib_verbs.h
This allows the function to be used by low-level infiniband drivers.
Cc: <stable@vger.kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Diffstat (limited to 'include/rdma/ib_verbs.h')
| -rw-r--r-- | include/rdma/ib_verbs.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 9fc8a825aa28..20fa5c591e81 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -3734,6 +3734,20 @@ static inline int ib_check_mr_access(int flags) return 0; } +static inline bool ib_access_writable(int access_flags) +{ + /* + * We have writable memory backing the MR if any of the following + * access flags are set. "Local write" and "remote write" obviously + * require write access. "Remote atomic" can do things like fetch and + * add, which will modify memory, and "MW bind" can change permissions + * by binding a window. + */ + return access_flags & + (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | + IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND); +} + /** * ib_check_mr_status: lightweight check of MR status. * This routine may provide status checks on a selected |