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/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2018 Intel Corporation
*/
#ifndef _I915_PRIOLIST_TYPES_H_
#define _I915_PRIOLIST_TYPES_H_
#include <linux/list.h>
#include <linux/rbtree.h>
#include <uapi/drm/i915_drm.h>
enum {
I915_PRIORITY_MIN = I915_CONTEXT_MIN_USER_PRIORITY - 1,
I915_PRIORITY_NORMAL = I915_CONTEXT_DEFAULT_PRIORITY,
I915_PRIORITY_MAX = I915_CONTEXT_MAX_USER_PRIORITY + 1,
/* A preemptive pulse used to monitor the health of each engine */
I915_PRIORITY_HEARTBEAT,
/* Interactive workload, scheduled for immediate pageflipping */
I915_PRIORITY_DISPLAY,
};
#define I915_USER_PRIORITY_SHIFT 2
#define I915_USER_PRIORITY(x) ((x) << I915_USER_PRIORITY_SHIFT)
#define I915_PRIORITY_COUNT BIT(I915_USER_PRIORITY_SHIFT)
#define I915_PRIORITY_MASK (I915_PRIORITY_COUNT - 1)
#define I915_PRIORITY_WAIT ((u8)BIT(0))
#define I915_PRIORITY_NOSEMAPHORE ((u8)BIT(1))
/* Smallest priority value that cannot be bumped. */
#define I915_PRIORITY_INVALID (INT_MIN | (u8)I915_PRIORITY_MASK)
/*
* Requests containing performance queries must not be preempted by
* another context. They get scheduled with their default priority and
* once they reach the execlist ports we ensure that they stick on the
* HW until finished by pretending that they have maximum priority,
* i.e. nothing can have higher priority and force us to usurp the
* active request.
*/
#define I915_PRIORITY_UNPREEMPTABLE INT_MAX
#define I915_PRIORITY_BARRIER (I915_PRIORITY_UNPREEMPTABLE - 1)
#define __NO_PREEMPTION (I915_PRIORITY_WAIT)
struct i915_priolist {
struct list_head requests[I915_PRIORITY_COUNT];
struct rb_node node;
unsigned long used;
int priority;
};
#endif /* _I915_PRIOLIST_TYPES_H_ */
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