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
34struct intel_timeline *
35__intel_timeline_create(struct intel_gt *gt,
36			struct i915_vma *global_hwsp,
37			unsigned int offset);
38
39static inline struct intel_timeline *
40intel_timeline_create(struct intel_gt *gt)
41{
42	return __intel_timeline_create(gt, NULL, 0);
43}
44
45static inline struct intel_timeline *
46intel_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
54static inline struct intel_timeline *
55intel_timeline_get(struct intel_timeline *timeline)
56{
57	kref_get(&timeline->kref);
58	return timeline;
59}
60
61void __intel_timeline_free(struct kref *kref);
62static inline void intel_timeline_put(struct intel_timeline *timeline)
63{
64	kref_put(&timeline->kref, __intel_timeline_free);
65}
66
67static 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
73static 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
79static 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
85static 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
91void __intel_timeline_pin(struct intel_timeline *tl);
92int intel_timeline_pin(struct intel_timeline *tl, struct i915_gem_ww_ctx *ww);
93void intel_timeline_enter(struct intel_timeline *tl);
94int intel_timeline_get_seqno(struct intel_timeline *tl,
95			     struct i915_request *rq,
96			     u32 *seqno);
97void intel_timeline_exit(struct intel_timeline *tl);
98void intel_timeline_unpin(struct intel_timeline *tl);
99
100void intel_timeline_reset_seqno(const struct intel_timeline *tl);
101
102int intel_timeline_read_hwsp(struct i915_request *from,
103			     struct i915_request *until,
104			     u32 *hwsp_offset);
105
106void intel_gt_init_timelines(struct intel_gt *gt);
107void intel_gt_fini_timelines(struct intel_gt *gt);
108
109#endif
110