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 int intel_timeline_init(struct intel_timeline *tl,
35 			struct intel_gt *gt,
36 			struct i915_vma *hwsp);
37 void intel_timeline_fini(struct intel_timeline *tl);
38 
39 struct intel_timeline *
40 intel_timeline_create(struct intel_gt *gt, struct i915_vma *global_hwsp);
41 
42 static inline struct intel_timeline *
43 intel_timeline_get(struct intel_timeline *timeline)
44 {
45 	kref_get(&timeline->kref);
46 	return timeline;
47 }
48 
49 void __intel_timeline_free(struct kref *kref);
50 static inline void intel_timeline_put(struct intel_timeline *timeline)
51 {
52 	kref_put(&timeline->kref, __intel_timeline_free);
53 }
54 
55 static inline int __intel_timeline_sync_set(struct intel_timeline *tl,
56 					    u64 context, u32 seqno)
57 {
58 	return i915_syncmap_set(&tl->sync, context, seqno);
59 }
60 
61 static inline int intel_timeline_sync_set(struct intel_timeline *tl,
62 					  const struct dma_fence *fence)
63 {
64 	return __intel_timeline_sync_set(tl, fence->context, fence->seqno);
65 }
66 
67 static inline bool __intel_timeline_sync_is_later(struct intel_timeline *tl,
68 						  u64 context, u32 seqno)
69 {
70 	return i915_syncmap_is_later(&tl->sync, context, seqno);
71 }
72 
73 static inline bool intel_timeline_sync_is_later(struct intel_timeline *tl,
74 						const struct dma_fence *fence)
75 {
76 	return __intel_timeline_sync_is_later(tl, fence->context, fence->seqno);
77 }
78 
79 int intel_timeline_pin(struct intel_timeline *tl);
80 void intel_timeline_enter(struct intel_timeline *tl);
81 int intel_timeline_get_seqno(struct intel_timeline *tl,
82 			     struct i915_request *rq,
83 			     u32 *seqno);
84 void intel_timeline_exit(struct intel_timeline *tl);
85 void intel_timeline_unpin(struct intel_timeline *tl);
86 
87 int intel_timeline_read_hwsp(struct i915_request *from,
88 			     struct i915_request *until,
89 			     u32 *hwsp_offset);
90 
91 void intel_gt_init_timelines(struct intel_gt *gt);
92 void intel_gt_fini_timelines(struct intel_gt *gt);
93 
94 #endif
95