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      1 /*	$NetBSD: i915_scheduler.h,v 1.3 2021/12/19 11:37:50 riastradh Exp $	*/
      2 
      3 /*
      4  * SPDX-License-Identifier: MIT
      5  *
      6  * Copyright  2018 Intel Corporation
      7  */
      8 
      9 #ifndef _I915_SCHEDULER_H_
     10 #define _I915_SCHEDULER_H_
     11 
     12 #include <linux/bitops.h>
     13 #include <linux/list.h>
     14 #include <linux/kernel.h>
     15 
     16 #include "i915_scheduler_types.h"
     17 
     18 #define priolist_for_each_request(it, plist, idx) \
     19 	for (idx = 0; idx < ARRAY_SIZE((plist)->requests); idx++) \
     20 		list_for_each_entry(it, &(plist)->requests[idx], sched.link)
     21 
     22 #define priolist_for_each_request_consume(it, n, plist, idx) \
     23 	for (; \
     24 	     (plist)->used ? (idx = __ffs((plist)->used)), 1 : 0; \
     25 	     (plist)->used &= ~BIT(idx)) \
     26 		list_for_each_entry_safe(it, n, \
     27 					 &(plist)->requests[idx], \
     28 					 sched.link)
     29 
     30 void i915_sched_node_init(struct i915_sched_node *node);
     31 void i915_sched_node_reinit(struct i915_sched_node *node);
     32 
     33 bool __i915_sched_node_add_dependency(struct i915_sched_node *node,
     34 				      struct i915_sched_node *signal,
     35 				      struct i915_dependency *dep,
     36 				      unsigned long flags);
     37 
     38 int i915_sched_node_add_dependency(struct i915_sched_node *node,
     39 				   struct i915_sched_node *signal);
     40 
     41 void i915_sched_node_fini(struct i915_sched_node *node);
     42 
     43 void i915_schedule(struct i915_request *request,
     44 		   const struct i915_sched_attr *attr);
     45 
     46 void i915_schedule_bump_priority(struct i915_request *rq, unsigned int bump);
     47 
     48 struct list_head *
     49 i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio);
     50 
     51 void __i915_priolist_free(struct i915_priolist *p);
     52 static inline void i915_priolist_free(struct i915_priolist *p)
     53 {
     54 	if (p->priority != I915_PRIORITY_NORMAL)
     55 		__i915_priolist_free(p);
     56 }
     57 
     58 void i915_sched_init(struct intel_engine_execlists *);
     59 
     60 #endif /* _I915_SCHEDULER_H_ */
     61