drivers/gpu/drm/i915/i915_scheduler.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright © 2018 Intel Corporation
   5  */
   6
   7 #ifndef _I915_SCHEDULER_H_
   8 #define _I915_SCHEDULER_H_
   9
  10 #include <linux/bitops.h>
  11 #include <linux/list.h>
  12 #include <linux/kernel.h>
  13
  14 #include "i915_scheduler_types.h"
  15
  16 struct drm_printer;
  17
  18 #define priolist_for_each_request(it, plist) \
  19         list_for_each_entry(it, &(plist)->requests, sched.link)
  20
  21 #define priolist_for_each_request_consume(it, n, plist) \
  22         list_for_each_entry_safe(it, n, &(plist)->requests, sched.link)
  23
  24 void i915_sched_node_init(struct i915_sched_node *node);
  25 void i915_sched_node_reinit(struct i915_sched_node *node);
  26
  27 bool __i915_sched_node_add_dependency(struct i915_sched_node *node,
  28                                       struct i915_sched_node *signal,
  29                                       struct i915_dependency *dep,
  30                                       unsigned long flags);
  31
  32 int i915_sched_node_add_dependency(struct i915_sched_node *node,
  33                                    struct i915_sched_node *signal,
  34                                    unsigned long flags);
  35
  36 void i915_sched_node_fini(struct i915_sched_node *node);
  37
  38 void i915_schedule(struct i915_request *request,
  39                    const struct i915_sched_attr *attr);
  40
  41 struct list_head *
  42 i915_sched_lookup_priolist(struct i915_sched_engine *sched_engine, int prio);
  43
  44 void __i915_priolist_free(struct i915_priolist *p);
  45 static inline void i915_priolist_free(struct i915_priolist *p)
  46 {
  47         if (p->priority != I915_PRIORITY_NORMAL)
  48                 __i915_priolist_free(p);
  49 }
  50
  51 struct i915_sched_engine *
  52 i915_sched_engine_create(unsigned int subclass);
  53
  54 static inline struct i915_sched_engine *
  55 i915_sched_engine_get(struct i915_sched_engine *sched_engine)
  56 {
  57         kref_get(&sched_engine->ref);
  58         return sched_engine;
  59 }
  60
  61 static inline void
  62 i915_sched_engine_put(struct i915_sched_engine *sched_engine)
  63 {
  64         kref_put(&sched_engine->ref, sched_engine->destroy);
  65 }
  66
  67 static inline bool
  68 i915_sched_engine_is_empty(struct i915_sched_engine *sched_engine)
  69 {
  70         return RB_EMPTY_ROOT(&sched_engine->queue.rb_root);
  71 }
  72
  73 static inline void
  74 i915_sched_engine_reset_on_empty(struct i915_sched_engine *sched_engine)
  75 {
  76         if (i915_sched_engine_is_empty(sched_engine))
  77                 sched_engine->no_priolist = false;
  78 }
  79
  80 static inline void
  81 i915_sched_engine_active_lock_bh(struct i915_sched_engine *sched_engine)
  82 {
  83         local_bh_disable(); /* prevent local softirq and lock recursion */
  84         tasklet_lock(&sched_engine->tasklet);
  85 }
  86
  87 static inline void
  88 i915_sched_engine_active_unlock_bh(struct i915_sched_engine *sched_engine)
  89 {
  90         tasklet_unlock(&sched_engine->tasklet);
  91         local_bh_enable(); /* restore softirq, and kick ksoftirqd! */
  92 }
  93
  94 void i915_request_show_with_schedule(struct drm_printer *m,
  95                                      const struct i915_request *rq,
  96                                      const char *prefix,
  97                                      int indent);
  98
  99 static inline bool
 100 i915_sched_engine_disabled(struct i915_sched_engine *sched_engine)
 101 {
 102         return sched_engine->disabled(sched_engine);
 103 }
 104
 105 void i915_scheduler_module_exit(void);
 106 int i915_scheduler_module_init(void);
 107
 108 #endif /* _I915_SCHEDULER_H_ */