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_ */ 110