1/*	$NetBSD: i915_active_types.h,v 1.3 2021/12/19 11:52:07 riastradh Exp $	*/
2
3/*
4 * SPDX-License-Identifier: MIT
5 *
6 * Copyright �� 2019 Intel Corporation
7 */
8
9#ifndef _I915_ACTIVE_TYPES_H_
10#define _I915_ACTIVE_TYPES_H_
11
12#include <linux/atomic.h>
13#include <linux/dma-fence.h>
14#include <linux/llist.h>
15#include <linux/mutex.h>
16#include <linux/rbtree.h>
17#include <linux/rcupdate.h>
18#include <linux/workqueue.h>
19
20#include <drm/drm_wait_netbsd.h> /* XXX */
21
22#include "i915_utils.h"
23
24struct i915_active_fence {
25	struct dma_fence __rcu *fence;
26	struct dma_fence_cb cb;
27	struct llist_node llist;
28};
29
30struct active_node;
31
32#define I915_ACTIVE_MAY_SLEEP BIT(0)
33
34#define __i915_active_call __aligned(4)
35#define i915_active_may_sleep(fn) ptr_pack_bits(&(fn), I915_ACTIVE_MAY_SLEEP, 2)
36
37struct i915_active {
38	atomic_t count;
39	struct mutex mutex;
40
41	spinlock_t tree_lock;
42	drm_waitqueue_t tree_wq;
43	struct active_node *cache;
44	struct rb_root tree;
45
46	/* Preallocated "exclusive" node */
47	struct i915_active_fence excl;
48
49	unsigned long flags;
50#define I915_ACTIVE_RETIRE_SLEEPS BIT(0)
51
52	int (*active)(struct i915_active *ref);
53	void (*retire)(struct i915_active *ref);
54
55	struct work_struct work;
56
57	struct llist_head preallocated_barriers;
58};
59
60#endif /* _I915_ACTIVE_TYPES_H_ */
61