drm/amdgpu: reserve the PD during unmap and remove

We not only need to protect the mapping tree and freed list itself,
but also the items on those list.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 24 insertions, 10 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index cb27754ec07f..7f6b4d9841e5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -140,25 +140,40 @@ int amdgpu_gem_object_open(struct drm_gem_object *obj, struct drm_file *file_pri
 void amdgpu_gem_object_close(struct drm_gem_object *obj,
                              struct drm_file *file_priv)
 {
-        struct amdgpu_bo *rbo = gem_to_amdgpu_bo(obj);
-        struct amdgpu_device *adev = rbo->adev;
+        struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
+        struct amdgpu_device *adev = bo->adev;
         struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
         struct amdgpu_vm *vm = &fpriv->vm;
+
+        struct amdgpu_bo_list_entry vm_pd;
+        struct list_head list, duplicates;
+        struct ttm_validate_buffer tv;
+        struct ww_acquire_ctx ticket;
         struct amdgpu_bo_va *bo_va;
         int r;
-        r = amdgpu_bo_reserve(rbo, true);
+
+        INIT_LIST_HEAD(&list);
+        INIT_LIST_HEAD(&duplicates);
+
+        tv.bo = &bo->tbo;
+        tv.shared = true;
+        list_add(&tv.head, &list);
+
+        amdgpu_vm_get_pd_bo(vm, &list, &vm_pd);
+
+        r = ttm_eu_reserve_buffers(&ticket, &list, true, &duplicates);
         if (r) {
                 dev_err(adev->dev, "leaking bo va because "
                         "we fail to reserve bo (%d)\n", r);
                 return;
         }
-        bo_va = amdgpu_vm_bo_find(vm, rbo);
+        bo_va = amdgpu_vm_bo_find(vm, bo);
         if (bo_va) {
                 if (--bo_va->ref_count == 0) {
                         amdgpu_vm_bo_rmv(adev, bo_va);
                 }
         }
-        amdgpu_bo_unreserve(rbo);
+        ttm_eu_backoff_reservation(&ticket, &list);
 }
 
 static int amdgpu_gem_handle_lockup(struct amdgpu_device *adev, int r)
@@ -580,11 +595,10 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
         tv.shared = true;
         list_add(&tv.head, &list);
 
-        if (args->operation == AMDGPU_VA_OP_MAP) {
-                tv_pd.bo = &fpriv->vm.page_directory->tbo;
-                tv_pd.shared = true;
-                list_add(&tv_pd.head, &list);
-        }
+        tv_pd.bo = &fpriv->vm.page_directory->tbo;
+        tv_pd.shared = true;
+        list_add(&tv_pd.head, &list);
+
         r = ttm_eu_reserve_buffers(&ticket, &list, true, &duplicates);
         if (r) {
                 drm_gem_object_unreference_unlocked(gobj);