2 * Copyright (C) 2015 Red Hat, Inc.
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10 * permit persons to whom the Software is furnished to do so, subject to
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13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 #include "virtgpu_drv.h"
29 static const char *virtio_get_driver_name(struct dma_fence *f)
34 static const char *virtio_get_timeline_name(struct dma_fence *f)
39 static bool virtio_signaled(struct dma_fence *f)
41 struct virtio_gpu_fence *fence = to_virtio_fence(f);
43 if (atomic64_read(&fence->drv->last_seq) >= fence->seq)
48 static void virtio_fence_value_str(struct dma_fence *f, char *str, int size)
50 struct virtio_gpu_fence *fence = to_virtio_fence(f);
52 snprintf(str, size, "%llu", fence->seq);
55 static void virtio_timeline_value_str(struct dma_fence *f, char *str, int size)
57 struct virtio_gpu_fence *fence = to_virtio_fence(f);
59 snprintf(str, size, "%llu", (u64)atomic64_read(&fence->drv->last_seq));
62 static const struct dma_fence_ops virtio_fence_ops = {
63 .get_driver_name = virtio_get_driver_name,
64 .get_timeline_name = virtio_get_timeline_name,
65 .signaled = virtio_signaled,
66 .fence_value_str = virtio_fence_value_str,
67 .timeline_value_str = virtio_timeline_value_str,
70 int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
71 struct virtio_gpu_ctrl_hdr *cmd_hdr,
72 struct virtio_gpu_fence **fence)
74 struct virtio_gpu_fence_driver *drv = &vgdev->fence_drv;
75 unsigned long irq_flags;
77 *fence = kmalloc(sizeof(struct virtio_gpu_fence), GFP_ATOMIC);
81 spin_lock_irqsave(&drv->lock, irq_flags);
83 (*fence)->seq = ++drv->sync_seq;
84 dma_fence_init(&(*fence)->f, &virtio_fence_ops, &drv->lock,
85 drv->context, (*fence)->seq);
86 dma_fence_get(&(*fence)->f);
87 list_add_tail(&(*fence)->node, &drv->fences);
88 spin_unlock_irqrestore(&drv->lock, irq_flags);
90 cmd_hdr->flags |= cpu_to_le32(VIRTIO_GPU_FLAG_FENCE);
91 cmd_hdr->fence_id = cpu_to_le64((*fence)->seq);
95 void virtio_gpu_fence_event_process(struct virtio_gpu_device *vgdev,
98 struct virtio_gpu_fence_driver *drv = &vgdev->fence_drv;
99 struct virtio_gpu_fence *fence, *tmp;
100 unsigned long irq_flags;
102 spin_lock_irqsave(&drv->lock, irq_flags);
103 atomic64_set(&vgdev->fence_drv.last_seq, last_seq);
104 list_for_each_entry_safe(fence, tmp, &drv->fences, node) {
105 if (last_seq < fence->seq)
107 dma_fence_signal_locked(&fence->f);
108 list_del(&fence->node);
109 dma_fence_put(&fence->f);
111 spin_unlock_irqrestore(&drv->lock, irq_flags);