diff options
| author | Christian König <christian.koenig@amd.com> | 2016-06-01 16:10:02 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-06-02 09:27:41 +0300 |
| commit | 76bf0db5543976ef50362db7071da367cb118532 (patch) | |
| tree | c8f94084239df5d095c80d87d423d44d95081379 /drivers/gpu/drm/nouveau/nouveau_fence.h | |
| parent | 3377900791ea48a638fb9b70869258332951271d (diff) | |
| download | linux-76bf0db5543976ef50362db7071da367cb118532.tar.xz | |
dma-buf/fence: make fence context 64 bit v2
Fence contexts are created on the fly (for example) by the GPU scheduler used
in the amdgpu driver as a result of an userspace request. Because of this
userspace could in theory force a wrap around of the 32bit context number
if it doesn't behave well.
Avoid this by increasing the context number to 64bits. This way even when
userspace manages to allocate a billion contexts per second it takes more
than 500 years for the context number to wrap around.
v2: fix printf formats as well.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1464786612-5010-2-git-send-email-deathsimple@vodafone.de
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_fence.h')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_fence.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.h b/drivers/gpu/drm/nouveau/nouveau_fence.h index 2e3a62d38fe9..64c4ce7115ad 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fence.h +++ b/drivers/gpu/drm/nouveau/nouveau_fence.h @@ -57,7 +57,8 @@ struct nouveau_fence_priv { int (*context_new)(struct nouveau_channel *); void (*context_del)(struct nouveau_channel *); - u32 contexts, context_base; + u32 contexts; + u64 context_base; bool uevent; }; |