drm/amdgpu: Add notifier lock for KFD userptrs

Add a per-process MMU notifier lock for processing notifiers from
userptrs. Use that lock to properly synchronize page table updates with
MMU notifiers.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Xiaogang Chen<Xiaogang.Chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 3 insertions, 9 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_hmm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_hmm.c
index 65715cb395d8..2dadcfe43d03 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_hmm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_hmm.c
@@ -105,17 +105,11 @@ static bool amdgpu_hmm_invalidate_hsa(struct mmu_interval_notifier *mni,
 				      unsigned long cur_seq)
 {
 	struct amdgpu_bo *bo = container_of(mni, struct amdgpu_bo, notifier);
-	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 
 	if (!mmu_notifier_range_blockable(range))
 		return false;
 
-	mutex_lock(&adev->notifier_lock);
-
-	mmu_interval_set_seq(mni, cur_seq);
-
-	amdgpu_amdkfd_evict_userptr(bo->kfd_bo, bo->notifier.mm);
-	mutex_unlock(&adev->notifier_lock);
+	amdgpu_amdkfd_evict_userptr(mni, cur_seq, bo->kfd_bo);
 
 	return true;
 }
@@ -244,9 +238,9 @@ out_free_range:
 	return r;
 }
 
-int amdgpu_hmm_range_get_pages_done(struct hmm_range *hmm_range)
+bool amdgpu_hmm_range_get_pages_done(struct hmm_range *hmm_range)
 {
-	int r;
+	bool r;
 
 	r = mmu_interval_read_retry(hmm_range->notifier,
 				    hmm_range->notifier_seq);