1/*
2 * SPDX-License-Identifier: MIT
3 *
4 * Copyright �� 2018 Intel Corporation
5 */
6
7#ifndef _I915_PRIOLIST_TYPES_H_
8#define _I915_PRIOLIST_TYPES_H_
9
10#include <linux/list.h>
11#include <linux/rbtree.h>
12
13#include <uapi/drm/i915_drm.h>
14
15enum {
16	I915_PRIORITY_MIN = I915_CONTEXT_MIN_USER_PRIORITY - 1,
17	I915_PRIORITY_NORMAL = I915_CONTEXT_DEFAULT_PRIORITY,
18	I915_PRIORITY_MAX = I915_CONTEXT_MAX_USER_PRIORITY + 1,
19
20	/* A preemptive pulse used to monitor the health of each engine */
21	I915_PRIORITY_HEARTBEAT,
22
23	/* Interactive workload, scheduled for immediate pageflipping */
24	I915_PRIORITY_DISPLAY,
25};
26
27/* Smallest priority value that cannot be bumped. */
28#define I915_PRIORITY_INVALID (INT_MIN)
29
30/*
31 * Requests containing performance queries must not be preempted by
32 * another context. They get scheduled with their default priority and
33 * once they reach the execlist ports we ensure that they stick on the
34 * HW until finished by pretending that they have maximum priority,
35 * i.e. nothing can have higher priority and force us to usurp the
36 * active request.
37 */
38#define I915_PRIORITY_UNPREEMPTABLE INT_MAX
39#define I915_PRIORITY_BARRIER (I915_PRIORITY_UNPREEMPTABLE - 1)
40
41struct i915_priolist {
42	struct list_head requests;
43	struct rb_node node;
44	int priority;
45};
46
47#endif /* _I915_PRIOLIST_TYPES_H_ */
48