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| author | Ben Skeggs <bskeggs@redhat.com> | 2016-12-12 10:52:45 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-09 10:32:19 +0300 |
| commit | bfa563bae25131fc084c273b43a789819e302fe7 (patch) | |
| tree | 72767d908b267f415e5d5b1c84cfc4d235b8fd61 /drivers/gpu/drm/nouveau/nouveau_bo.c | |
| parent | a5b4c77c92da629bf10926fe05cdf972e0e08f86 (diff) | |
| download | linux-bfa563bae25131fc084c273b43a789819e302fe7.tar.xz | |
drm/nouveau/ttm: wait for bo fence to signal before unmapping vmas
commit 10dcab3e7f477bffee88d518aad57d06777cfdf4 upstream.
TTM was changed a while back to allow for pipelining of buffer moves, and
part of this was the removal of waiting for a BO to idle before calling
move(), placing the responsibility on the driver to do this if required.
That's all well and good, except, we make use of move_notify() to handle
mapping/unmapping from the GPU VMM as move() isn't called on all paths.
This commit adds a wait before unmapping from a VMM in move_notify(), to
prevent GPU page faults where a buffer is still being accessed.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_bo.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_bo.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index 343b8659472c..a2e6a81669e7 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -1209,6 +1209,7 @@ nouveau_bo_move_ntfy(struct ttm_buffer_object *bo, struct ttm_mem_reg *new_mem) nvbo->page_shift != vma->vm->mmu->lpg_shift)) { nvkm_vm_map(vma, new_mem->mm_node); } else { + WARN_ON(ttm_bo_wait(bo, false, false)); nvkm_vm_unmap(vma); } } |