2 #include "i915_drm_winsys.h"
3 #include "util/u_memory.h"
4 #include "util/u_atomic.h"
5 #include "util/u_inlines.h"
8 * Because gem does not have fence's we have to create our own fences.
10 * They work by keeping the batchbuffer around and checking if that has
11 * been idled. If bo is NULL fence has expired.
15 struct pipe_reference reference
;
20 struct pipe_fence_handle
*
21 i915_drm_fence_create(drm_intel_bo
*bo
)
23 struct i915_drm_fence
*fence
= CALLOC_STRUCT(i915_drm_fence
);
25 pipe_reference_init(&fence
->reference
, 1);
26 /* bo is null if fence already expired */
28 drm_intel_bo_reference(bo
);
32 return (struct pipe_fence_handle
*)fence
;
36 i915_drm_fence_reference(struct i915_winsys
*iws
,
37 struct pipe_fence_handle
**ptr
,
38 struct pipe_fence_handle
*fence
)
40 struct i915_drm_fence
*old
= (struct i915_drm_fence
*)*ptr
;
41 struct i915_drm_fence
*f
= (struct i915_drm_fence
*)fence
;
43 if (pipe_reference(&((struct i915_drm_fence
*)(*ptr
))->reference
, &f
->reference
)) {
45 drm_intel_bo_unreference(old
->bo
);
52 i915_drm_fence_signalled(struct i915_winsys
*iws
,
53 struct pipe_fence_handle
*fence
)
55 struct i915_drm_fence
*f
= (struct i915_drm_fence
*)fence
;
57 /* fence already expired */
61 return !drm_intel_bo_busy(f
->bo
);
65 i915_drm_fence_finish(struct i915_winsys
*iws
,
66 struct pipe_fence_handle
*fence
)
68 struct i915_drm_fence
*f
= (struct i915_drm_fence
*)fence
;
70 /* fence already expired */
74 drm_intel_bo_wait_rendering(f
->bo
);
75 drm_intel_bo_unreference(f
->bo
);
82 i915_drm_winsys_init_fence_functions(struct i915_drm_winsys
*idws
)
84 idws
->base
.fence_reference
= i915_drm_fence_reference
;
85 idws
->base
.fence_signalled
= i915_drm_fence_signalled
;
86 idws
->base
.fence_finish
= i915_drm_fence_finish
;