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Merge tag 'x86-mm-2025-01-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
[linux.git] / drivers / gpu / drm / imagination / pvr_sync.h
1 /* SPDX-License-Identifier: GPL-2.0-only OR MIT */
2 /* Copyright (c) 2023 Imagination Technologies Ltd. */
3
4 #ifndef PVR_SYNC_H
5 #define PVR_SYNC_H
6
7 #include <uapi/drm/pvr_drm.h>
8
9 /* Forward declaration from <linux/xarray.h>. */
10 struct xarray;
11
12 /* Forward declaration from <drm/drm_file.h>. */
13 struct drm_file;
14
15 /* Forward declaration from <drm/gpu_scheduler.h>. */
16 struct drm_sched_job;
17
18 /* Forward declaration from "pvr_device.h". */
19 struct pvr_file;
20
21 /**
22  * struct pvr_sync_signal - Object encoding a syncobj signal operation
23  *
24  * The job submission logic collects all signal operations in an array of
25  * pvr_sync_signal objects. This array also serves as a cache to get the
26  * latest dma_fence when multiple jobs are submitted at once, and one job
27  * signals a syncobj point that's later waited on by a subsequent job.
28  */
29 struct pvr_sync_signal {
30         /** @handle: Handle of the syncobj to signal. */
31         u32 handle;
32
33         /**
34          * @point: Point to signal in the syncobj.
35          *
36          * Only relevant for timeline syncobjs.
37          */
38         u64 point;
39
40         /** @syncobj: Syncobj retrieved from the handle. */
41         struct drm_syncobj *syncobj;
42
43         /**
44          * @chain: Chain object used to link the new fence with the
45          *         existing timeline syncobj.
46          *
47          * Should be zero when manipulating a regular syncobj.
48          */
49         struct dma_fence_chain *chain;
50
51         /**
52          * @fence: New fence object to attach to the syncobj.
53          *
54          * This pointer starts with the current fence bound to
55          * the <handle,point> pair.
56          */
57         struct dma_fence *fence;
58 };
59
60 void
61 pvr_sync_signal_array_cleanup(struct xarray *array);
62
63 int
64 pvr_sync_signal_array_collect_ops(struct xarray *array,
65                                   struct drm_file *file,
66                                   u32 sync_op_count,
67                                   const struct drm_pvr_sync_op *sync_ops);
68
69 int
70 pvr_sync_signal_array_update_fences(struct xarray *array,
71                                     u32 sync_op_count,
72                                     const struct drm_pvr_sync_op *sync_ops,
73                                     struct dma_fence *done_fence);
74
75 void
76 pvr_sync_signal_array_push_fences(struct xarray *array);
77
78 int
79 pvr_sync_add_deps_to_job(struct pvr_file *pvr_file, struct drm_sched_job *job,
80                          u32 sync_op_count,
81                          const struct drm_pvr_sync_op *sync_ops,
82                          struct xarray *signal_array);
83
84 #endif /* PVR_SYNC_H */
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