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 #include "i915_tasklet.h"
  16
  17 struct drm_printer;
  18
  19 #define priolist_for_each_request(it, plist) \
  20         list_for_each_entry(it, &(plist)->requests, sched.link)
  21
  22 #define priolist_for_each_request_consume(it, n, plist) \
  23         list_for_each_entry_safe(it, n, &(plist)->requests, sched.link)
  24
  25 void i915_sched_node_init(struct i915_sched_node *node);
  26 void i915_sched_node_reinit(struct i915_sched_node *node);
  27
  28 bool __i915_sched_node_add_dependency(struct i915_sched_node *node,
  29                                       struct i915_sched_node *signal,
  30                                       struct i915_dependency *dep,
  31                                       unsigned long flags);
  32
  33 int i915_sched_node_add_dependency(struct i915_sched_node *node,
  34                                    struct i915_sched_node *signal,
  35                                    unsigned long flags);
  36
  37 void i915_sched_node_fini(struct i915_sched_node *node);
  38
  39 void i915_schedule(struct i915_request *request,
  40                    const struct i915_sched_attr *attr);
  41
  42 struct list_head *
  43 i915_sched_lookup_priolist(struct i915_sched_engine *sched_engine, int prio);
  44
  45 void __i915_priolist_free(struct i915_priolist *p);
  46 static inline void i915_priolist_free(struct i915_priolist *p)
  47 {
  48         if (p->priority != I915_PRIORITY_NORMAL)
  49                 __i915_priolist_free(p);
  50 }
  51
  52 struct i915_sched_engine *
  53 i915_sched_engine_create(unsigned int subclass);
  54
  55 static inline struct i915_sched_engine *
  56 i915_sched_engine_get(struct i915_sched_engine *sched_engine)
  57 {
  58         kref_get(&sched_engine->ref);
  59         return sched_engine;
  60 }
  61
  62 static inline void
  63 i915_sched_engine_put(struct i915_sched_engine *sched_engine)
  64 {
  65         kref_put(&sched_engine->ref, sched_engine->destroy);
  66 }
  67
  68 static inline bool
  69 i915_sched_engine_is_empty(struct i915_sched_engine *sched_engine)
  70 {
  71         return RB_EMPTY_ROOT(&sched_engine->queue.rb_root);
  72 }
  73
  74 static inline void
  75 i915_sched_engine_reset_on_empty(struct i915_sched_engine *sched_engine)
  76 {
  77         if (i915_sched_engine_is_empty(sched_engine))
  78                 sched_engine->no_priolist = false;
  79 }
  80
  81 static inline void
  82 i915_sched_engine_active_lock_bh(struct i915_sched_engine *sched_engine)
  83 {
  84         local_bh_disable(); /* prevent local softirq and lock recursion */
  85         tasklet_lock(&sched_engine->tasklet);
  86 }
  87
  88 static inline void
  89 i915_sched_engine_active_unlock_bh(struct i915_sched_engine *sched_engine)
  90 {
  91         tasklet_unlock(&sched_engine->tasklet);
  92         local_bh_enable(); /* restore softirq, and kick ksoftirqd! */
  93 }
  94
  95 void i915_request_show_with_schedule(struct drm_printer *m,
  96                                      const struct i915_request *rq,
  97                                      const char *prefix,
  98                                      int indent);
  99
 100 static inline bool
 101 i915_sched_engine_disabled(struct i915_sched_engine *sched_engine)
 102 {
 103         return sched_engine->disabled(sched_engine);
 104 }
 105
 106 void i915_scheduler_module_exit(void);
 107 int i915_scheduler_module_init(void);
 108
 109 #endif /* _I915_SCHEDULER_H_ */