2 * SPDX-License-Identifier: MIT
4 * Copyright © 2018 Intel Corporation
7 #ifndef _I915_PRIOLIST_TYPES_H_
8 #define _I915_PRIOLIST_TYPES_H_
10 #include <linux/list.h>
11 #include <linux/rbtree.h>
13 #include <uapi/drm/i915_drm.h>
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,
20 /* A preemptive pulse used to monitor the health of each engine */
21 I915_PRIORITY_HEARTBEAT,
23 /* Interactive workload, scheduled for immediate pageflipping */
24 I915_PRIORITY_DISPLAY,
27 #define I915_USER_PRIORITY_SHIFT 0
28 #define I915_USER_PRIORITY(x) ((x) << I915_USER_PRIORITY_SHIFT)
30 #define I915_PRIORITY_COUNT BIT(I915_USER_PRIORITY_SHIFT)
31 #define I915_PRIORITY_MASK (I915_PRIORITY_COUNT - 1)
33 /* Smallest priority value that cannot be bumped. */
34 #define I915_PRIORITY_INVALID (INT_MIN | (u8)I915_PRIORITY_MASK)
37 * Requests containing performance queries must not be preempted by
38 * another context. They get scheduled with their default priority and
39 * once they reach the execlist ports we ensure that they stick on the
40 * HW until finished by pretending that they have maximum priority,
41 * i.e. nothing can have higher priority and force us to usurp the
44 #define I915_PRIORITY_UNPREEMPTABLE INT_MAX
45 #define I915_PRIORITY_BARRIER (I915_PRIORITY_UNPREEMPTABLE - 1)
47 struct i915_priolist {
48 struct list_head requests[I915_PRIORITY_COUNT];
54 #endif /* _I915_PRIOLIST_TYPES_H_ */