LXR linux/drivers/gpu/drm/i915/i915

   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
  16struct 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
  24void i915_sched_node_init(struct i915_sched_node *node);
  25void i915_sched_node_reinit(struct i915_sched_node *node);
  26
  27bool __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
  32int i915_sched_node_add_dependency(struct i915_sched_node *node,
  33                                   struct i915_sched_node *signal,
  34                                   unsigned long flags);
  35
  36void i915_sched_node_fini(struct i915_sched_node *node);
  37
  38void i915_schedule(struct i915_request *request,
  39                   const struct i915_sched_attr *attr);
  40
  41struct list_head *
  42i915_sched_lookup_priolist(struct i915_sched_engine *sched_engine, int prio);
  43
  44void __i915_priolist_free(struct i915_priolist *p);
  45static inline void i915_priolist_free(struct i915_priolist *p)
  46{
  47        if (p->priority != I915_PRIORITY_NORMAL)
  48                __i915_priolist_free(p);
  49}
  50
  51struct i915_sched_engine *
  52i915_sched_engine_create(unsigned int subclass);
  53
  54static inline struct i915_sched_engine *
  55i915_sched_engine_get(struct i915_sched_engine *sched_engine)
  56{
  57        kref_get(&sched_engine->ref);
  58        return sched_engine;
  59}
  60
  61static inline void
  62i915_sched_engine_put(struct i915_sched_engine *sched_engine)
  63{
  64        kref_put(&sched_engine->ref, sched_engine->destroy);
  65}
  66
  67static inline bool
  68i915_sched_engine_is_empty(struct i915_sched_engine *sched_engine)
  69{
  70        return RB_EMPTY_ROOT(&sched_engine->queue.rb_root);
  71}
  72
  73static inline void
  74i915_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
  80static inline void
  81i915_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
  87static inline void
  88i915_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
  94void i915_request_show_with_schedule(struct drm_printer *m,
  95                                     const struct i915_request *rq,
  96                                     const char *prefix,
  97                                     int indent);
  98
  99static inline bool
 100i915_sched_engine_disabled(struct i915_sched_engine *sched_engine)
 101{
 102        return sched_engine->disabled(sched_engine);
 103}
 104
 105void i915_scheduler_module_exit(void);
 106int i915_scheduler_module_init(void);
 107
 108#endif /* _I915_SCHEDULER_H_ */
 109