drivers/gpu/drm/vmwgfx/vmwgfx_fence.h

   1 /**************************************************************************
   2  *
   3  * Copyright © 2011-2012 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
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  12  * the following conditions:
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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  27
  28 #ifndef _VMWGFX_FENCE_H_
  29
  30 #include <linux/dma-fence.h>
  31 #include <linux/dma-fence-array.h>
  32
  33 #define VMW_FENCE_WAIT_TIMEOUT (5*HZ)
  34
  35 struct vmw_private;
  36
  37 struct vmw_fence_manager;
  38
  39 /**
  40  *
  41  *
  42  */
  43 enum vmw_action_type {
  44         VMW_ACTION_EVENT = 0,
  45         VMW_ACTION_MAX
  46 };
  47
  48 struct vmw_fence_action {
  49         struct list_head head;
  50         enum vmw_action_type type;
  51         void (*seq_passed) (struct vmw_fence_action *action);
  52         void (*cleanup) (struct vmw_fence_action *action);
  53 };
  54
  55 struct vmw_fence_obj {
  56         struct dma_fence base;
  57
  58         struct list_head head;
  59         struct list_head seq_passed_actions;
  60         void (*destroy)(struct vmw_fence_obj *fence);
  61 };
  62
  63 extern struct vmw_fence_manager *
  64 vmw_fence_manager_init(struct vmw_private *dev_priv);
  65
  66 extern void vmw_fence_manager_takedown(struct vmw_fence_manager *fman);
  67
  68 static inline void
  69 vmw_fence_obj_unreference(struct vmw_fence_obj **fence_p)
  70 {
  71         struct vmw_fence_obj *fence = *fence_p;
  72
  73         *fence_p = NULL;
  74         if (fence)
  75                 dma_fence_put(&fence->base);
  76 }
  77
  78 static inline struct vmw_fence_obj *
  79 vmw_fence_obj_reference(struct vmw_fence_obj *fence)
  80 {
  81         if (fence)
  82                 dma_fence_get(&fence->base);
  83         return fence;
  84 }
  85
  86 extern void vmw_fences_update(struct vmw_fence_manager *fman);
  87
  88 extern bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence);
  89
  90 extern int vmw_fence_obj_wait(struct vmw_fence_obj *fence,
  91                               bool lazy,
  92                               bool interruptible, unsigned long timeout);
  93
  94 extern void vmw_fence_obj_flush(struct vmw_fence_obj *fence);
  95
  96 extern int vmw_fence_create(struct vmw_fence_manager *fman,
  97                             uint32_t seqno,
  98                             struct vmw_fence_obj **p_fence);
  99
 100 extern int vmw_user_fence_create(struct drm_file *file_priv,
 101                                  struct vmw_fence_manager *fman,
 102                                  uint32_t sequence,
 103                                  struct vmw_fence_obj **p_fence,
 104                                  uint32_t *p_handle);
 105
 106 extern int vmw_wait_dma_fence(struct vmw_fence_manager *fman,
 107                               struct dma_fence *fence);
 108
 109 extern void vmw_fence_fifo_up(struct vmw_fence_manager *fman);
 110
 111 extern void vmw_fence_fifo_down(struct vmw_fence_manager *fman);
 112
 113 extern int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data,
 114                                     struct drm_file *file_priv);
 115
 116 extern int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data,
 117                                         struct drm_file *file_priv);
 118
 119 extern int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
 120                                      struct drm_file *file_priv);
 121 extern int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
 122                                  struct drm_file *file_priv);
 123 extern int vmw_event_fence_action_queue(struct drm_file *filee_priv,
 124                                         struct vmw_fence_obj *fence,
 125                                         struct drm_pending_event *event,
 126                                         uint32_t *tv_sec,
 127                                         uint32_t *tv_usec,
 128                                         bool interruptible);
 129 #endif /* _VMWGFX_FENCE_H_ */