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 21 #define I915_USER_PRIORITY_SHIFT 2 22 #define I915_USER_PRIORITY(x) ((x) << I915_USER_PRIORITY_SHIFT) 23 24 #define I915_PRIORITY_COUNT BIT(I915_USER_PRIORITY_SHIFT) 25 #define I915_PRIORITY_MASK (I915_PRIORITY_COUNT - 1) 26 27 #define I915_PRIORITY_WAIT ((u8)BIT(0)) 28 #define I915_PRIORITY_NOSEMAPHORE ((u8)BIT(1)) 29 30 /* Smallest priority value that cannot be bumped. */ 31 #define I915_PRIORITY_INVALID (INT_MIN | (u8)I915_PRIORITY_MASK) 32 33 /* 34 * Requests containing performance queries must not be preempted by 35 * another context. They get scheduled with their default priority and 36 * once they reach the execlist ports we ensure that they stick on the 37 * HW until finished by pretending that they have maximum priority, 38 * i.e. nothing can have higher priority and force us to usurp the 39 * active request. 40 */ 41 #define I915_PRIORITY_UNPREEMPTABLE INT_MAX 42 43 #define __NO_PREEMPTION (I915_PRIORITY_WAIT) 44 45 struct i915_priolist { 46 struct list_head requests[I915_PRIORITY_COUNT]; 47 struct rb_node node; 48 unsigned long used; 49 int priority; 50 }; 51 52 #endif /* _I915_PRIOLIST_TYPES_H_ */ 53
