1 /*
2  * Copyright © 2016 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  *
23  */
24 
25 #ifndef I915_TIMELINE_H
26 #define I915_TIMELINE_H
27 
28 #include <linux/lockdep.h>
29 
30 #include "i915_active.h"
31 #include "i915_syncmap.h"
32 #include "gt/intel_timeline_types.h"
33 
34 struct intel_timeline *
35 intel_timeline_create(struct intel_gt *gt, struct i915_vma *global_hwsp);
36 
37 static inline struct intel_timeline *
38 intel_timeline_get(struct intel_timeline *timeline)
39 {
40 	kref_get(&timeline->kref);
41 	return timeline;
42 }
43 
44 void __intel_timeline_free(struct kref *kref);
45 static inline void intel_timeline_put(struct intel_timeline *timeline)
46 {
47 	kref_put(&timeline->kref, __intel_timeline_free);
48 }
49 
50 static inline int __intel_timeline_sync_set(struct intel_timeline *tl,
51 					    u64 context, u32 seqno)
52 {
53 	return i915_syncmap_set(&tl->sync, context, seqno);
54 }
55 
56 static inline int intel_timeline_sync_set(struct intel_timeline *tl,
57 					  const struct dma_fence *fence)
58 {
59 	return __intel_timeline_sync_set(tl, fence->context, fence->seqno);
60 }
61 
62 static inline bool __intel_timeline_sync_is_later(struct intel_timeline *tl,
63 						  u64 context, u32 seqno)
64 {
65 	return i915_syncmap_is_later(&tl->sync, context, seqno);
66 }
67 
68 static inline bool intel_timeline_sync_is_later(struct intel_timeline *tl,
69 						const struct dma_fence *fence)
70 {
71 	return __intel_timeline_sync_is_later(tl, fence->context, fence->seqno);
72 }
73 
74 int intel_timeline_pin(struct intel_timeline *tl);
75 void intel_timeline_enter(struct intel_timeline *tl);
76 int intel_timeline_get_seqno(struct intel_timeline *tl,
77 			     struct i915_request *rq,
78 			     u32 *seqno);
79 void intel_timeline_exit(struct intel_timeline *tl);
80 void intel_timeline_unpin(struct intel_timeline *tl);
81 
82 void intel_timeline_reset_seqno(const struct intel_timeline *tl);
83 
84 int intel_timeline_read_hwsp(struct i915_request *from,
85 			     struct i915_request *until,
86 			     u32 *hwsp_offset);
87 
88 void intel_gt_init_timelines(struct intel_gt *gt);
89 void intel_gt_fini_timelines(struct intel_gt *gt);
90 
91 #endif
92