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 #define I915_USER_PRIORITY_SHIFT 0 28 #define I915_USER_PRIORITY(x) ((x) << I915_USER_PRIORITY_SHIFT) 29 30 #define I915_PRIORITY_COUNT BIT(I915_USER_PRIORITY_SHIFT) 31 #define I915_PRIORITY_MASK (I915_PRIORITY_COUNT - 1) 32 33 /* Smallest priority value that cannot be bumped. */ 34 #define I915_PRIORITY_INVALID (INT_MIN | (u8)I915_PRIORITY_MASK) 35 36 /* 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 42 * active request. 43 */ 44 #define I915_PRIORITY_UNPREEMPTABLE INT_MAX 45 #define I915_PRIORITY_BARRIER (I915_PRIORITY_UNPREEMPTABLE - 1) 46 47 struct i915_priolist { 48 struct list_head requests[I915_PRIORITY_COUNT]; 49 struct rb_node node; 50 unsigned long used; 51 int priority; 52 }; 53 54 #endif /* _I915_PRIOLIST_TYPES_H_ */ 55