drivers/gpu/drm/vmwgfx/vmwgfx_fence.h

   1 /**************************************************************************
   2  *
   3  * Copyright © 2011-2012 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
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  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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  25  *
  26  **************************************************************************/
  27
  28 #ifndef _VMWGFX_FENCE_H_
  29
  30 #include <linux/fence.h>
  31
  32 #define VMW_FENCE_WAIT_TIMEOUT (5*HZ)
  33
  34 struct vmw_private;
  35
  36 struct vmw_fence_manager;
  37
  38 /**
  39  *
  40  *
  41  */
  42 enum vmw_action_type {
  43         VMW_ACTION_EVENT = 0,
  44         VMW_ACTION_MAX
  45 };
  46
  47 struct vmw_fence_action {
  48         struct list_head head;
  49         enum vmw_action_type type;
  50         void (*seq_passed) (struct vmw_fence_action *action);
  51         void (*cleanup) (struct vmw_fence_action *action);
  52 };
  53
  54 struct vmw_fence_obj {
  55         struct fence base;
  56
  57         struct list_head head;
  58         struct list_head seq_passed_actions;
  59         void (*destroy)(struct vmw_fence_obj *fence);
  60 };
  61
  62 extern struct vmw_fence_manager *
  63 vmw_fence_manager_init(struct vmw_private *dev_priv);
  64
  65 extern void vmw_fence_manager_takedown(struct vmw_fence_manager *fman);
  66
  67 static inline void
  68 vmw_fence_obj_unreference(struct vmw_fence_obj **fence_p)
  69 {
  70         struct vmw_fence_obj *fence = *fence_p;
  71
  72         *fence_p = NULL;
  73         if (fence)
  74                 fence_put(&fence->base);
  75 }
  76
  77 static inline struct vmw_fence_obj *
  78 vmw_fence_obj_reference(struct vmw_fence_obj *fence)
  79 {
  80         if (fence)
  81                 fence_get(&fence->base);
  82         return fence;
  83 }
  84
  85 extern void vmw_fences_update(struct vmw_fence_manager *fman);
  86
  87 extern bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence);
  88
  89 extern int vmw_fence_obj_wait(struct vmw_fence_obj *fence,
  90                               bool lazy,
  91                               bool interruptible, unsigned long timeout);
  92
  93 extern void vmw_fence_obj_flush(struct vmw_fence_obj *fence);
  94
  95 extern int vmw_fence_create(struct vmw_fence_manager *fman,
  96                             uint32_t seqno,
  97                             struct vmw_fence_obj **p_fence);
  98
  99 extern int vmw_user_fence_create(struct drm_file *file_priv,
 100                                  struct vmw_fence_manager *fman,
 101                                  uint32_t sequence,
 102                                  struct vmw_fence_obj **p_fence,
 103                                  uint32_t *p_handle);
 104
 105 extern void vmw_fence_fifo_up(struct vmw_fence_manager *fman);
 106
 107 extern void vmw_fence_fifo_down(struct vmw_fence_manager *fman);
 108
 109 extern int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data,
 110                                     struct drm_file *file_priv);
 111
 112 extern int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data,
 113                                         struct drm_file *file_priv);
 114
 115 extern int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
 116                                      struct drm_file *file_priv);
 117 extern int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
 118                                  struct drm_file *file_priv);
 119 extern void vmw_event_fence_fpriv_gone(struct vmw_fence_manager *fman,
 120                                        struct list_head *event_list);
 121 extern int vmw_event_fence_action_queue(struct drm_file *filee_priv,
 122                                         struct vmw_fence_obj *fence,
 123                                         struct drm_pending_event *event,
 124                                         uint32_t *tv_sec,
 125                                         uint32_t *tv_usec,
 126                                         bool interruptible);
 127 #endif /* _VMWGFX_FENCE_H_ */