38 static const char *vgem_fence_get_driver_name(struct dma_fence *fence)  in vgem_fence_get_driver_name()  argument
43 static const char *vgem_fence_get_timeline_name(struct dma_fence *fence)  in vgem_fence_get_timeline_name()  argument
50 	struct vgem_fence *fence = container_of(base, typeof(*fence), base);  in vgem_fence_release()  local
52 	del_timer_sync(&fence->timer);  in vgem_fence_release()
53 	dma_fence_free(&fence->base);  in vgem_fence_release()
56 static void vgem_fence_value_str(struct dma_fence *fence, char *str, int size)  in vgem_fence_value_str()  argument
58 	snprintf(str, size, "%llu", fence->seqno);  in vgem_fence_value_str()
61 static void vgem_fence_timeline_value_str(struct dma_fence *fence, char *str,  in vgem_fence_timeline_value_str()  argument
65 		 dma_fence_is_signaled(fence) ? fence->seqno : 0);  in vgem_fence_timeline_value_str()
79 	struct vgem_fence *fence = from_timer(fence, t, timer);  in vgem_fence_timeout()  local
81 	dma_fence_signal(&fence->base);  in vgem_fence_timeout()
87 	struct vgem_fence *fence;  in vgem_fence_create()  local
89 	fence = kzalloc(sizeof(*fence), GFP_KERNEL);  in vgem_fence_create()
90 	if (!fence)  in vgem_fence_create()
93 	spin_lock_init(&fence->lock);  in vgem_fence_create()
94 	dma_fence_init(&fence->base, &vgem_fence_ops, &fence->lock,  in vgem_fence_create()
97 	timer_setup(&fence->timer, vgem_fence_timeout, 0);  in vgem_fence_create()
99 	/* We force the fence to expire within 10s to prevent driver hangs */  in vgem_fence_create()
100 	mod_timer(&fence->timer, jiffies + VGEM_FENCE_TIMEOUT);  in vgem_fence_create()
102 	return &fence->base;  in vgem_fence_create()
108  * Create and attach a fence to the vGEM handle. This fence is then exposed
110  * dma-buf. If the flags contain VGEM_FENCE_WRITE, the fence indicates the
112  * fence, otherwise the fence indicates the client is current reading from the
114  * completion. Note that if a conflicting fence is already on the dma-buf (i.e.
115  * an exclusive fence when adding a read, or any fence when adding a write),
119  * This returns the handle for the new fence that must be signaled within 10
134 	struct dma_fence *fence;  in vgem_fence_attach_ioctl()  local
147 	fence = vgem_fence_create(vfile, arg->flags);  in vgem_fence_attach_ioctl()
148 	if (!fence) {  in vgem_fence_attach_ioctl()
153 	/* Check for a conflicting fence */  in vgem_fence_attach_ioctl()
161 	/* Expose the fence via the dma-buf */  in vgem_fence_attach_ioctl()
165 		dma_resv_add_fence(resv, fence, arg->flags & VGEM_FENCE_WRITE ?  in vgem_fence_attach_ioctl()
169 	/* Record the fence in our idr for later signaling */  in vgem_fence_attach_ioctl()
172 		ret = idr_alloc(&vfile->fence_idr, fence, 1, 0, GFP_KERNEL);  in vgem_fence_attach_ioctl()
181 		dma_fence_signal(fence);  in vgem_fence_attach_ioctl()
182 		dma_fence_put(fence);  in vgem_fence_attach_ioctl()
192  * Signal and consume a fence ealier attached to a vGEM handle using
198  * Signaling a fence indicates to all consumers of the dma-buf that the
199  * client has completed the operation associated with the fence, and that the
202  * If the fence does not exist (or has already been signaled by the client),
211 	struct dma_fence *fence;  in vgem_fence_signal_ioctl()  local
218 	fence = idr_replace(&vfile->fence_idr, NULL, arg->fence);  in vgem_fence_signal_ioctl()
220 	if (!fence)  in vgem_fence_signal_ioctl()
222 	if (IS_ERR(fence))  in vgem_fence_signal_ioctl()
223 		return PTR_ERR(fence);  in vgem_fence_signal_ioctl()
225 	if (dma_fence_is_signaled(fence))  in vgem_fence_signal_ioctl()
228 	dma_fence_signal(fence);  in vgem_fence_signal_ioctl()
229 	dma_fence_put(fence);  in vgem_fence_signal_ioctl()