1/* SPDX-License-Identifier: MIT */
 2/*
 3 * Copyright © 2022 Intel Corporation
 4 */
 5
 6#ifndef _XE_PREEMPT_FENCE_H_
 7#define _XE_PREEMPT_FENCE_H_
 8
 9#include "xe_preempt_fence_types.h"
10
11struct list_head;
12
13struct dma_fence *
14xe_preempt_fence_create(struct xe_exec_queue *q,
15			u64 context, u32 seqno);
16
17struct xe_preempt_fence *xe_preempt_fence_alloc(void);
18
19void xe_preempt_fence_free(struct xe_preempt_fence *pfence);
20
21struct dma_fence *
22xe_preempt_fence_arm(struct xe_preempt_fence *pfence, struct xe_exec_queue *q,
23		     u64 context, u32 seqno);
24
25static inline struct xe_preempt_fence *
26to_preempt_fence(struct dma_fence *fence)
27{
28	return container_of(fence, struct xe_preempt_fence, base);
29}
30
31/**
32 * xe_preempt_fence_link() - Return a link used to keep unarmed preempt
33 * fences on a list.
34 * @pfence: Pointer to the preempt fence.
35 *
36 * The link is embedded in the struct xe_preempt_fence. Use
37 * link_to_preempt_fence() to convert back to the preempt fence.
38 *
39 * Return: A pointer to an embedded struct list_head.
40 */
41static inline struct list_head *
42xe_preempt_fence_link(struct xe_preempt_fence *pfence)
43{
44	return &pfence->link;
45}
46
47/**
48 * to_preempt_fence_from_link() - Convert back to a preempt fence pointer
49 * from a link obtained with xe_preempt_fence_link().
50 * @link: The struct list_head obtained from xe_preempt_fence_link().
51 *
52 * Return: A pointer to the embedding struct xe_preempt_fence.
53 */
54static inline struct xe_preempt_fence *
55to_preempt_fence_from_link(struct list_head *link)
56{
57	return container_of(link, struct xe_preempt_fence, link);
58}
59
60bool xe_fence_is_xe_preempt(const struct dma_fence *fence);
61#endif