diff options
| author | Artemy Kovalyov <artemyko@mellanox.com> | 2017-01-18 17:58:07 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-02-14 19:41:17 +0300 |
| commit | d07d1d70ce1ad1c525f51f459ce36ca49ec2bf48 (patch) | |
| tree | 09873cb0c3319aa49d59d1f44e2007e9bbd96356 /drivers/infiniband/core/umem.c | |
| parent | 25bf14d6f5898a59325f3ecabda7695565776594 (diff) | |
| download | linux-d07d1d70ce1ad1c525f51f459ce36ca49ec2bf48.tar.xz | |
IB/umem: Update on demand page (ODP) support
Currently ODP MR may explicitly register virtual address space area
of limited length.
This change allows MR to cover entire process virtual address space
dynamicaly adding/removing translation entries to device MTT.
Add following changes to support implicit MR:
* Allow umem to be zero size to back-up implicit MR.
* Add new function ib_alloc_odp_umem() to add virtual memory regions
to implicit MR dynamically on demand.
* Add new function rbt_ib_umem_lookup() to find dynamically added
virtual memory regions.
* Expose function rbt_ib_umem_for_each_in_range() to other modules and
make it safe
Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/core/umem.c')
| -rw-r--r-- | drivers/infiniband/core/umem.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index 1e62a5f0cb28..9f9630b1bc7b 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -99,9 +99,6 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, if (dmasync) dma_attrs |= DMA_ATTR_WRITE_BARRIER; - if (!size) - return ERR_PTR(-EINVAL); - /* * If the combination of the addr and size requested for this memory * region causes an integer overflow, return error. |