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 drm_printer;
35 
36 struct intel_timeline *
37 __intel_timeline_create(struct intel_gt *gt,
38 			struct i915_vma *global_hwsp,
39 			unsigned int offset);
40 
41 static inline struct intel_timeline *
42 intel_timeline_create(struct intel_gt *gt)
43 {
44 	return __intel_timeline_create(gt, NULL, 0);
45 }
46 
47 struct intel_timeline *
48 intel_timeline_create_from_engine(struct intel_engine_cs *engine,
49 				  unsigned int offset);
50 
51 static inline struct intel_timeline *
52 intel_timeline_get(struct intel_timeline *timeline)
53 {
54 	kref_get(&timeline->kref);
55 	return timeline;
56 }
57 
58 void __intel_timeline_free(struct kref *kref);
59 static inline void intel_timeline_put(struct intel_timeline *timeline)
60 {
61 	kref_put(&timeline->kref, __intel_timeline_free);
62 }
63 
64 static inline int __intel_timeline_sync_set(struct intel_timeline *tl,
65 					    u64 context, u32 seqno)
66 {
67 	return i915_syncmap_set(&tl->sync, context, seqno);
68 }
69 
70 static inline int intel_timeline_sync_set(struct intel_timeline *tl,
71 					  const struct dma_fence *fence)
72 {
73 	return __intel_timeline_sync_set(tl, fence->context, fence->seqno);
74 }
75 
76 static inline bool __intel_timeline_sync_is_later(struct intel_timeline *tl,
77 						  u64 context, u32 seqno)
78 {
79 	return i915_syncmap_is_later(&tl->sync, context, seqno);
80 }
81 
82 static inline bool intel_timeline_sync_is_later(struct intel_timeline *tl,
83 						const struct dma_fence *fence)
84 {
85 	return __intel_timeline_sync_is_later(tl, fence->context, fence->seqno);
86 }
87 
88 void __intel_timeline_pin(struct intel_timeline *tl);
89 int intel_timeline_pin(struct intel_timeline *tl, struct i915_gem_ww_ctx *ww);
90 void intel_timeline_enter(struct intel_timeline *tl);
91 int intel_timeline_get_seqno(struct intel_timeline *tl,
92 			     struct i915_request *rq,
93 			     u32 *seqno);
94 void intel_timeline_exit(struct intel_timeline *tl);
95 void intel_timeline_unpin(struct intel_timeline *tl);
96 
97 void intel_timeline_reset_seqno(const struct intel_timeline *tl);
98 
99 int intel_timeline_read_hwsp(struct i915_request *from,
100 			     struct i915_request *until,
101 			     u32 *hwsp_offset);
102 
103 void intel_gt_init_timelines(struct intel_gt *gt);
104 void intel_gt_fini_timelines(struct intel_gt *gt);
105 
106 void intel_gt_show_timelines(struct intel_gt *gt,
107 			     struct drm_printer *m,
108 			     void (*show_request)(struct drm_printer *m,
109 						  const struct i915_request *rq,
110 						  const char *prefix,
111 						  int indent));
112 
113 static inline bool
114 intel_timeline_is_last(const struct intel_timeline *tl,
115 		       const struct i915_request *rq)
116 {
117 	return list_is_last_rcu(&rq->link, &tl->requests);
118 }
119 
120 #endif
121