diff options
| author | Naresh Gottumukkala <bgottumukkala@emulex.com> | 2013-08-26 13:57:44 +0400 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2013-09-03 08:18:32 +0400 |
| commit | cffce99051b80c90630a9fff662a1b25e278069d (patch) | |
| tree | 58257cc50f34458649c412d5a723063d53b417a3 /drivers/infiniband/hw/ocrdma/ocrdma.h | |
| parent | 2b51a9b9eb6bf240d2592e10d2f8823dd1f5ee3e (diff) | |
| download | linux-cffce99051b80c90630a9fff662a1b25e278069d.tar.xz | |
RDMA/ocrdma: Dont use PD 0 for userpace CQ DB
Create_CQ verb doesn't provide a PD pointer. So, until now we are
creating all (both userspace and kernel) CQ DB regions from PD0. This
will result in mmapping PD0 to applications. A rogue userspace
application can mess things up.
Also more serious issues is even the be2net NIC uses PD0.
This patch addresses this problem by:
1) Create a PD page for every userspace application when the
alloc_ucontext is called. This will be destroyed in
dealloc_ucontext.
2) All CQs for that context will use the PD allocated in ucontext.
3) The first create_PD call from application will result in returning
the PD address from its ucontext (no new PD will be created).
4) For subsecquent create_pd calls from application, we create new PDs for
the application.
Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/ocrdma/ocrdma.h')
| -rw-r--r-- | drivers/infiniband/hw/ocrdma/ocrdma.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma.h b/drivers/infiniband/hw/ocrdma/ocrdma.h index 1c8ba4cefcba..fde8fb097a8c 100644 --- a/drivers/infiniband/hw/ocrdma/ocrdma.h +++ b/drivers/infiniband/hw/ocrdma/ocrdma.h @@ -324,6 +324,9 @@ struct ocrdma_ucontext { struct list_head mm_head; struct mutex mm_list_lock; /* protects list entries of mm type */ + struct ocrdma_pd *cntxt_pd; + int pd_in_use; + struct { u32 *va; dma_addr_t pa; |