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drm/amdgpu: keep the MMU lock until the update ends v4

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This is quite controversial because it adds another lock which is held during
page table updates, but I don't see much other option.

v2: allow multiple updates to be in flight at the same time
v3: simplify the patch, take the read side only once
v4: correctly fix rebase conflict

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2017-09-05 17:30:46 +02:00
committed by Alex Deucher
parent aebc5e6f50
commit 1ed3d2567c
2 changed files with 57 additions and 6 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu.h
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@@ -1204,11 +1204,11 @@ void amdgpu_test_moves(struct amdgpu_device *adev);
* MMU Notifier
*/
#if defined(CONFIG_MMU_NOTIFIER)
void amdgpu_mn_lock(struct amdgpu_mn *mn);
void amdgpu_mn_unlock(struct amdgpu_mn *mn);
struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev);
int amdgpu_mn_register(struct amdgpu_bo *bo, unsigned long addr);
void amdgpu_mn_unregister(struct amdgpu_bo *bo);
void amdgpu_mn_lock(struct amdgpu_mn *mn);
void amdgpu_mn_unlock(struct amdgpu_mn *mn);
#else
static inline void amdgpu_mn_lock(struct amdgpu_mn *mn) {}
static inline void amdgpu_mn_unlock(struct amdgpu_mn *mn) {}