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 15 enum { 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 41 struct i915_priolist { 42 struct list_head requests; 43 struct rb_node node; 44 int priority; 45 }; 46 47 #endif /* _I915_PRIOLIST_TYPES_H_ */ 48