/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright © 2018 Intel Corporation
 */

#ifndef _I915_SCHEDULER_H_
#define _I915_SCHEDULER_H_

#include <linux/bitops.h>
#include <linux/list.h>
#include <linux/kernel.h>

#include "i915_scheduler_types.h"

#define priolist_for_each_request(it, plist, idx) \
	for (idx = 0; idx < ARRAY_SIZE((plist)->requests); idx++) \
		list_for_each_entry(it, &(plist)->requests[idx], sched.link)

#define priolist_for_each_request_consume(it, n, plist, idx) \
	for (; \
	     (plist)->used ? (idx = __ffs((plist)->used)), 1 : 0; \
	     (plist)->used &= ~BIT(idx)) \
		list_for_each_entry_safe(it, n, \
					 &(plist)->requests[idx], \
					 sched.link)

void i915_sched_node_init(struct i915_sched_node *node);

bool __i915_sched_node_add_dependency(struct i915_sched_node *node,
				      struct i915_sched_node *signal,
				      struct i915_dependency *dep,
				      unsigned long flags);

int i915_sched_node_add_dependency(struct i915_sched_node *node,
				   struct i915_sched_node *signal);

void i915_sched_node_fini(struct i915_sched_node *node);

void i915_schedule(struct i915_request *request,
		   const struct i915_sched_attr *attr);

void i915_schedule_bump_priority(struct i915_request *rq, unsigned int bump);

struct list_head *
i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio);

void __i915_priolist_free(struct i915_priolist *p);
static inline void i915_priolist_free(struct i915_priolist *p)
{
	if (p->priority != I915_PRIORITY_NORMAL)
		__i915_priolist_free(p);
}

#endif /* _I915_SCHEDULER_H_ */