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
34struct intel_timeline *
35intel_timeline_create(struct intel_gt *gt, struct i915_vma *global_hwsp);
36
37static inline struct intel_timeline *
38intel_timeline_get(struct intel_timeline *timeline)
39{
40	kref_get(&timeline->kref);
41	return timeline;
42}
43
44void __intel_timeline_free(struct kref *kref);
45static inline void intel_timeline_put(struct intel_timeline *timeline)
46{
47	kref_put(&timeline->kref, __intel_timeline_free);
48}
49
50static 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
56static 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
62static 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
68static 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
74int intel_timeline_pin(struct intel_timeline *tl);
75void intel_timeline_enter(struct intel_timeline *tl);
76int intel_timeline_get_seqno(struct intel_timeline *tl,
77			     struct i915_request *rq,
78			     u32 *seqno);
79void intel_timeline_exit(struct intel_timeline *tl);
80void intel_timeline_unpin(struct intel_timeline *tl);
81
82void intel_timeline_reset_seqno(const struct intel_timeline *tl);
83
84int intel_timeline_read_hwsp(struct i915_request *from,
85			     struct i915_request *until,
86			     u32 *hwsp_offset);
87
88void intel_gt_init_timelines(struct intel_gt *gt);
89void intel_gt_fini_timelines(struct intel_gt *gt);
90
91#endif