diff options
| author | Sagi Grimberg <sagig@mellanox.com> | 2014-12-11 18:04:16 +0300 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2014-12-16 05:13:35 +0300 |
| commit | 860f10a799c83e38a69d5a69d80da5312a4c4106 (patch) | |
| tree | 32bc827e3535988397e99b11f9db5c429c09511f /drivers/infiniband/core/umem.c | |
| parent | 5a77abf9a97a7ecc8fb0f6bf4ad411fb12b02f31 (diff) | |
| download | linux-860f10a799c83e38a69d5a69d80da5312a4c4106.tar.xz | |
IB/core: Add flags for on demand paging support
* Add a configuration option for enable on-demand paging support in
the infiniband subsystem (CONFIG_INFINIBAND_ON_DEMAND_PAGING). In a
later patch, this configuration option will select the MMU_NOTIFIER
configuration option to enable mmu notifiers.
* Add a flag for on demand paging (ODP) support in the IB device capabilities.
* Add a flag to request ODP MR in the access flags to reg_mr.
* Fail registrations done with the ODP flag when the low-level driver
doesn't support this.
* Change the conditions in which an MR will be writable to explicitly
specify the access flags. This is to avoid making an MR writable just
because it is an ODP MR.
* Add a ODP capabilities to the extended query device verb.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/core/umem.c')
| -rw-r--r-- | drivers/infiniband/core/umem.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index 6f152628e0d2..c328e4693d14 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -107,13 +107,15 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, umem->page_size = PAGE_SIZE; umem->pid = get_task_pid(current, PIDTYPE_PID); /* - * We ask for writable memory if any access flags other than - * "remote read" are set. "Local write" and "remote write" + * We ask for writable memory 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. */ - umem->writable = !!(access & ~IB_ACCESS_REMOTE_READ); + umem->writable = !!(access & + (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | + IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND)); /* We assume the memory is from hugetlb until proved otherwise */ umem->hugetlb = 1; |