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,
 10 * distribute, sub license, and/or sell copies of the Software, and to
 11 * permit persons to whom the Software is furnished to do so, subject to
 12 * the following conditions:
 13 *
 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.
 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,
 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 25 *
 26 **************************************************************************/
 27
 28#ifndef _VMWGFX_FENCE_H_
 29
 30#include <linux/dma-fence.h>
 31
 32#define VMW_FENCE_WAIT_TIMEOUT (5*HZ)
 33
 34struct vmw_private;
 35
 36struct vmw_fence_manager;
 37
 38/**
 39 *
 40 *
 41 */
 42enum vmw_action_type {
 43	VMW_ACTION_EVENT = 0,
 44	VMW_ACTION_MAX
 45};
 46
 47struct 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
 54struct vmw_fence_obj {
 55	struct dma_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
 62extern struct vmw_fence_manager *
 63vmw_fence_manager_init(struct vmw_private *dev_priv);
 64
 65extern void vmw_fence_manager_takedown(struct vmw_fence_manager *fman);
 66
 67static inline void
 68vmw_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		dma_fence_put(&fence->base);
 75}
 76
 77static inline struct vmw_fence_obj *
 78vmw_fence_obj_reference(struct vmw_fence_obj *fence)
 79{
 80	if (fence)
 81		dma_fence_get(&fence->base);
 82	return fence;
 83}
 84
 85extern void vmw_fences_update(struct vmw_fence_manager *fman);
 86
 87extern bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence);
 88
 89extern int vmw_fence_obj_wait(struct vmw_fence_obj *fence,
 90			      bool lazy,
 91			      bool interruptible, unsigned long timeout);
 92
 93extern void vmw_fence_obj_flush(struct vmw_fence_obj *fence);
 94
 95extern int vmw_fence_create(struct vmw_fence_manager *fman,
 96			    uint32_t seqno,
 97			    struct vmw_fence_obj **p_fence);
 98
 99extern 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
105extern void vmw_fence_fifo_up(struct vmw_fence_manager *fman);
106
107extern void vmw_fence_fifo_down(struct vmw_fence_manager *fman);
108
109extern int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data,
110				    struct drm_file *file_priv);
111
112extern int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data,
113					struct drm_file *file_priv);
114
115extern int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
116				     struct drm_file *file_priv);
117extern int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
118				 struct drm_file *file_priv);
119extern int vmw_event_fence_action_queue(struct drm_file *filee_priv,
120					struct vmw_fence_obj *fence,
121					struct drm_pending_event *event,
122					uint32_t *tv_sec,
123					uint32_t *tv_usec,
124					bool interruptible);
125#endif /* _VMWGFX_FENCE_H_ */