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 "intel_timeline_types.h"
33 
34 struct intel_timeline *
35 __intel_timeline_create(struct intel_gt *gt,
36 			struct i915_vma *global_hwsp,
37 			unsigned int offset);
38 
39 static inline struct intel_timeline *
40 intel_timeline_create(struct intel_gt *gt)
41 {
42 	return __intel_timeline_create(gt, NULL, 0);
43 }
44 
45 static inline struct intel_timeline *
46 intel_timeline_create_from_engine(struct intel_engine_cs *engine,
47 				  unsigned int offset)
48 {
49 	return __intel_timeline_create(engine->gt,
50 				       engine->status_page.vma,
51 				       offset);
52 }
53 
54 static inline struct intel_timeline *
55 intel_timeline_get(struct intel_timeline *timeline)
56 {
57 	kref_get(&timeline->kref);
58 	return timeline;
59 }
60 
61 void __intel_timeline_free(struct kref *kref);
62 static inline void intel_timeline_put(struct intel_timeline *timeline)
63 {
64 	kref_put(&timeline->kref, __intel_timeline_free);
65 }
66 
67 static inline int __intel_timeline_sync_set(struct intel_timeline *tl,
68 					    u64 context, u32 seqno)
69 {
70 	return i915_syncmap_set(&tl->sync, context, seqno);
71 }
72 
73 static inline int intel_timeline_sync_set(struct intel_timeline *tl,
74 					  const struct dma_fence *fence)
75 {
76 	return __intel_timeline_sync_set(tl, fence->context, fence->seqno);
77 }
78 
79 static inline bool __intel_timeline_sync_is_later(struct intel_timeline *tl,
80 						  u64 context, u32 seqno)
81 {
82 	return i915_syncmap_is_later(&tl->sync, context, seqno);
83 }
84 
85 static inline bool intel_timeline_sync_is_later(struct intel_timeline *tl,
86 						const struct dma_fence *fence)
87 {
88 	return __intel_timeline_sync_is_later(tl, fence->context, fence->seqno);
89 }
90 
91 void __intel_timeline_pin(struct intel_timeline *tl);
92 int intel_timeline_pin(struct intel_timeline *tl, struct i915_gem_ww_ctx *ww);
93 void intel_timeline_enter(struct intel_timeline *tl);
94 int intel_timeline_get_seqno(struct intel_timeline *tl,
95 			     struct i915_request *rq,
96 			     u32 *seqno);
97 void intel_timeline_exit(struct intel_timeline *tl);
98 void intel_timeline_unpin(struct intel_timeline *tl);
99 
100 void intel_timeline_reset_seqno(const struct intel_timeline *tl);
101 
102 int intel_timeline_read_hwsp(struct i915_request *from,
103 			     struct i915_request *until,
104 			     u32 *hwsp_offset);
105 
106 void intel_gt_init_timelines(struct intel_gt *gt);
107 void intel_gt_fini_timelines(struct intel_gt *gt);
108 
109 #endif
110