drm/radeon: add userptr flag to directly validate the BO to GTT

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / radeon / radeon_gem.c

diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
index 032736b429bfcbf822d4278c6caa573a4e173d61..450656027aba91db2a6574c5ddc20c718266ee23 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -291,7 +291,7 @@ int radeon_gem_userptr_ioctl(struct drm_device *dev, void *data,
 
        /* reject unknown flag values */
        if (args->flags & ~(RADEON_GEM_USERPTR_READONLY |
-           RADEON_GEM_USERPTR_ANONONLY))
+           RADEON_GEM_USERPTR_ANONONLY | RADEON_GEM_USERPTR_VALIDATE))
                return -EINVAL;
 
        /* readonly pages not tested on older hardware */
@@ -312,6 +312,22 @@ int radeon_gem_userptr_ioctl(struct drm_device *dev, void *data,
        if (r)
                goto release_object;
 
+       if (args->flags & RADEON_GEM_USERPTR_VALIDATE) {
+               down_read(&current->mm->mmap_sem);
+               r = radeon_bo_reserve(bo, true);
+               if (r) {
+                       up_read(&current->mm->mmap_sem);
+                       goto release_object;
+               }
+
+               radeon_ttm_placement_from_domain(bo, RADEON_GEM_DOMAIN_GTT);
+               r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
+               radeon_bo_unreserve(bo);
+               up_read(&current->mm->mmap_sem);
+               if (r)
+                       goto release_object;
+       }
+
        r = drm_gem_handle_create(filp, gobj, &handle);
        /* drop reference from allocate - handle holds it now */
        drm_gem_object_unreference_unlocked(gobj);