[PATCH 2/7] drm/amdgpu: fix amdgpu_vm_bo_wait

[Christian König]

From: Christian König <christian.koenig at amd.com>

We need to wait with the correct owner on unmap operations or otherwise can run
into VM faults.

Also always wait for the page directory since this is where the reservation
object comes from. So rename the function to amdgpu_vm_wait_pd instead as well.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index bf7696a7..ba3bfc3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -995,13 +995,14 @@ static void amdgpu_vm_cpu_set_ptes(struct amdgpu_pte_update_params *params,
 	amdgpu_gart_flush_gpu_tlb(params->adev, 0);
 }
 
-static int amdgpu_vm_bo_wait(struct amdgpu_device *adev, struct amdgpu_bo *bo)
+static int amdgpu_vm_wait_pd(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+			     void *owner)
 {
 	struct amdgpu_sync sync;
 	int r;
 
 	amdgpu_sync_create(&sync);
-	amdgpu_sync_resv(adev, &sync, bo->tbo.resv, AMDGPU_FENCE_OWNER_VM);
+	amdgpu_sync_resv(adev, &sync, vm->root.bo->tbo.resv, owner);
 	r = amdgpu_sync_wait(&sync, true);
 	amdgpu_sync_free(&sync);
 
@@ -1047,7 +1048,7 @@ static int amdgpu_vm_update_level(struct amdgpu_device *adev,
 		r = amdgpu_bo_kmap(parent->bo, (void **)&pd_addr);
 		if (r)
 			return r;
-		r = amdgpu_vm_bo_wait(adev, parent->bo);
+		r = amdgpu_vm_wait_pd(adev, vm, AMDGPU_FENCE_OWNER_VM);
 		if (unlikely(r)) {
 			amdgpu_bo_kunmap(parent->bo);
 			return r;
@@ -1445,6 +1446,10 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
 	params.vm = vm;
 	params.src = src;
 
+	/* sync to everything on unmapping */
+	if (!(flags & AMDGPU_PTE_VALID))
+		owner = AMDGPU_FENCE_OWNER_UNDEFINED;
+
 	if (vm->use_cpu_for_update) {
 		/* params.src is used as flag to indicate system Memory */
 		if (pages_addr)
@@ -1453,7 +1458,7 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
 		/* Wait for PT BOs to be free. PTs share the same resv. object
 		 * as the root PD BO
 		 */
-		r = amdgpu_vm_bo_wait(adev, vm->root.bo);
+		r = amdgpu_vm_wait_pd(adev, vm, owner);
 		if (unlikely(r))
 			return r;
 
@@ -1465,10 +1470,6 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
 
 	ring = container_of(vm->entity.sched, struct amdgpu_ring, sched);
 
-	/* sync to everything on unmapping */
-	if (!(flags & AMDGPU_PTE_VALID))
-		owner = AMDGPU_FENCE_OWNER_UNDEFINED;
-
 	nptes = last - start + 1;
 
 	/*
-- 
2.7.4