drivers/gpu/drm/i915/i915_timeline.h

   1 /*
   2  * Copyright © 2016 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #ifndef I915_TIMELINE_H
  26 #define I915_TIMELINE_H
  27
  28 #include <linux/lockdep.h>
  29
  30 #include "i915_active.h"
  31 #include "i915_syncmap.h"
  32 #include "i915_timeline_types.h"
  33
  34 int i915_timeline_init(struct drm_i915_private *i915,
  35                        struct i915_timeline *tl,
  36                        struct i915_vma *hwsp);
  37 void i915_timeline_fini(struct i915_timeline *tl);
  38
  39 static inline void
  40 i915_timeline_set_subclass(struct i915_timeline *timeline,
  41                            unsigned int subclass)
  42 {
  43         lockdep_set_subclass(&timeline->lock, subclass);
  44
  45         /*
  46          * Due to an interesting quirk in lockdep's internal debug tracking,
  47          * after setting a subclass we must ensure the lock is used. Otherwise,
  48          * nr_unused_locks is incremented once too often.
  49          */
  50 #ifdef CONFIG_DEBUG_LOCK_ALLOC
  51         local_irq_disable();
  52         lock_map_acquire(&timeline->lock.dep_map);
  53         lock_map_release(&timeline->lock.dep_map);
  54         local_irq_enable();
  55 #endif
  56 }
  57
  58 struct i915_timeline *
  59 i915_timeline_create(struct drm_i915_private *i915,
  60                      struct i915_vma *global_hwsp);
  61
  62 static inline struct i915_timeline *
  63 i915_timeline_get(struct i915_timeline *timeline)
  64 {
  65         kref_get(&timeline->kref);
  66         return timeline;
  67 }
  68
  69 void __i915_timeline_free(struct kref *kref);
  70 static inline void i915_timeline_put(struct i915_timeline *timeline)
  71 {
  72         kref_put(&timeline->kref, __i915_timeline_free);
  73 }
  74
  75 static inline int __i915_timeline_sync_set(struct i915_timeline *tl,
  76                                            u64 context, u32 seqno)
  77 {
  78         return i915_syncmap_set(&tl->sync, context, seqno);
  79 }
  80
  81 static inline int i915_timeline_sync_set(struct i915_timeline *tl,
  82                                          const struct dma_fence *fence)
  83 {
  84         return __i915_timeline_sync_set(tl, fence->context, fence->seqno);
  85 }
  86
  87 static inline bool __i915_timeline_sync_is_later(struct i915_timeline *tl,
  88                                                  u64 context, u32 seqno)
  89 {
  90         return i915_syncmap_is_later(&tl->sync, context, seqno);
  91 }
  92
  93 static inline bool i915_timeline_sync_is_later(struct i915_timeline *tl,
  94                                                const struct dma_fence *fence)
  95 {
  96         return __i915_timeline_sync_is_later(tl, fence->context, fence->seqno);
  97 }
  98
  99 int i915_timeline_pin(struct i915_timeline *tl);
 100 int i915_timeline_get_seqno(struct i915_timeline *tl,
 101                             struct i915_request *rq,
 102                             u32 *seqno);
 103 void i915_timeline_unpin(struct i915_timeline *tl);
 104
 105 int i915_timeline_read_hwsp(struct i915_request *from,
 106                             struct i915_request *until,
 107                             u32 *hwsp_offset);
 108
 109 void i915_timelines_init(struct drm_i915_private *i915);
 110 void i915_timelines_park(struct drm_i915_private *i915);
 111 void i915_timelines_fini(struct drm_i915_private *i915);
 112
 113 #endif