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      1 /*	$NetBSD: vmwgfx_fence.h,v 1.3 2021/12/18 23:45:45 riastradh Exp $	*/
      2 
      3 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
      4 /**************************************************************************
      5  *
      6  * Copyright 2011-2012 VMware, Inc., Palo Alto, CA., USA
      7  *
      8  * Permission is hereby granted, free of charge, to any person obtaining a
      9  * copy of this software and associated documentation files (the
     10  * "Software"), to deal in the Software without restriction, including
     11  * without limitation the rights to use, copy, modify, merge, publish,
     12  * distribute, sub license, and/or sell copies of the Software, and to
     13  * permit persons to whom the Software is furnished to do so, subject to
     14  * the following conditions:
     15  *
     16  * The above copyright notice and this permission notice (including the
     17  * next paragraph) shall be included in all copies or substantial portions
     18  * of the Software.
     19  *
     20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     22  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
     23  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
     24  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
     25  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
     26  * USE OR OTHER DEALINGS IN THE SOFTWARE.
     27  *
     28  **************************************************************************/
     29 
     30 #ifndef _VMWGFX_FENCE_H_
     31 
     32 #include <linux/dma-fence.h>
     33 #include <linux/dma-fence-array.h>
     34 
     35 #define VMW_FENCE_WAIT_TIMEOUT (5*HZ)
     36 
     37 struct drm_device;
     38 struct drm_file;
     39 struct drm_pending_event;
     40 
     41 struct vmw_private;
     42 struct vmw_fence_manager;
     43 
     44 /**
     45  *
     46  *
     47  */
     48 enum vmw_action_type {
     49 	VMW_ACTION_EVENT = 0,
     50 	VMW_ACTION_MAX
     51 };
     52 
     53 struct vmw_fence_action {
     54 	struct list_head head;
     55 	enum vmw_action_type type;
     56 	void (*seq_passed) (struct vmw_fence_action *action);
     57 	void (*cleanup) (struct vmw_fence_action *action);
     58 };
     59 
     60 struct vmw_fence_obj {
     61 	struct dma_fence base;
     62 
     63 	struct list_head head;
     64 	struct list_head seq_passed_actions;
     65 	void (*destroy)(struct vmw_fence_obj *fence);
     66 };
     67 
     68 extern struct vmw_fence_manager *
     69 vmw_fence_manager_init(struct vmw_private *dev_priv);
     70 
     71 extern void vmw_fence_manager_takedown(struct vmw_fence_manager *fman);
     72 
     73 static inline void
     74 vmw_fence_obj_unreference(struct vmw_fence_obj **fence_p)
     75 {
     76 	struct vmw_fence_obj *fence = *fence_p;
     77 
     78 	*fence_p = NULL;
     79 	if (fence)
     80 		dma_fence_put(&fence->base);
     81 }
     82 
     83 static inline struct vmw_fence_obj *
     84 vmw_fence_obj_reference(struct vmw_fence_obj *fence)
     85 {
     86 	if (fence)
     87 		dma_fence_get(&fence->base);
     88 	return fence;
     89 }
     90 
     91 extern void vmw_fences_update(struct vmw_fence_manager *fman);
     92 
     93 extern bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence);
     94 
     95 extern int vmw_fence_obj_wait(struct vmw_fence_obj *fence,
     96 			      bool lazy,
     97 			      bool interruptible, unsigned long timeout);
     98 
     99 extern void vmw_fence_obj_flush(struct vmw_fence_obj *fence);
    100 
    101 extern int vmw_fence_create(struct vmw_fence_manager *fman,
    102 			    uint32_t seqno,
    103 			    struct vmw_fence_obj **p_fence);
    104 
    105 extern int vmw_user_fence_create(struct drm_file *file_priv,
    106 				 struct vmw_fence_manager *fman,
    107 				 uint32_t sequence,
    108 				 struct vmw_fence_obj **p_fence,
    109 				 uint32_t *p_handle);
    110 
    111 extern int vmw_wait_dma_fence(struct vmw_fence_manager *fman,
    112 			      struct dma_fence *fence);
    113 
    114 extern void vmw_fence_fifo_up(struct vmw_fence_manager *fman);
    115 
    116 extern void vmw_fence_fifo_down(struct vmw_fence_manager *fman);
    117 
    118 extern int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data,
    119 				    struct drm_file *file_priv);
    120 
    121 extern int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data,
    122 					struct drm_file *file_priv);
    123 
    124 extern int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
    125 				     struct drm_file *file_priv);
    126 extern int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
    127 				 struct drm_file *file_priv);
    128 extern int vmw_event_fence_action_queue(struct drm_file *filee_priv,
    129 					struct vmw_fence_obj *fence,
    130 					struct drm_pending_event *event,
    131 					uint32_t *tv_sec,
    132 					uint32_t *tv_usec,
    133 					bool interruptible);
    134 #endif /* _VMWGFX_FENCE_H_ */
    135