Lines Matching refs:queue
28 * Video buffers queue management.
34 * the videobuf2 queue operations by serializing calls to videobuf2 and a
35 * spinlock to protect the IRQ queue that holds the buffers to be processed by
40 * videobuf2 queue operations
47 struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
49 container_of(queue, struct uvc_streaming, queue);
65 struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
74 if (unlikely(queue->flags & UVC_QUEUE_DISCONNECTED))
91 struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
95 spin_lock_irqsave(&queue->irqlock, flags);
96 if (likely(!(queue->flags & UVC_QUEUE_DISCONNECTED))) {
97 list_add_tail(&buf->queue, &queue->irqqueue);
106 spin_unlock_irqrestore(&queue->irqlock, flags);
111 struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
113 container_of(queue, struct uvc_streaming, queue);
122 struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
124 mutex_unlock(&queue->mutex);
129 struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
131 mutex_lock(&queue->mutex);
143 int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
148 queue->queue.type = type;
149 queue->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
150 queue->queue.drv_priv = queue;
151 queue->queue.buf_struct_size = sizeof(struct uvc_buffer);
152 queue->queue.ops = &uvc_queue_qops;
153 queue->queue.mem_ops = &vb2_vmalloc_memops;
154 queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
156 ret = vb2_queue_init(&queue->queue);
160 mutex_init(&queue->mutex);
161 spin_lock_init(&queue->irqlock);
162 INIT_LIST_HEAD(&queue->irqqueue);
163 queue->flags = drop_corrupted ? UVC_QUEUE_DROP_CORRUPTED : 0;
169 * V4L2 queue operations
172 int uvc_alloc_buffers(struct uvc_video_queue *queue,
177 mutex_lock(&queue->mutex);
178 ret = vb2_reqbufs(&queue->queue, rb);
179 mutex_unlock(&queue->mutex);
184 void uvc_free_buffers(struct uvc_video_queue *queue)
186 mutex_lock(&queue->mutex);
187 vb2_queue_release(&queue->queue);
188 mutex_unlock(&queue->mutex);
191 int uvc_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
195 mutex_lock(&queue->mutex);
196 ret = vb2_querybuf(&queue->queue, buf);
197 mutex_unlock(&queue->mutex);
202 int uvc_create_buffers(struct uvc_video_queue *queue,
207 mutex_lock(&queue->mutex);
208 ret = vb2_create_bufs(&queue->queue, cb);
209 mutex_unlock(&queue->mutex);
214 int uvc_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
218 mutex_lock(&queue->mutex);
219 ret = vb2_qbuf(&queue->queue, buf);
220 mutex_unlock(&queue->mutex);
225 int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf,
230 mutex_lock(&queue->mutex);
231 ret = vb2_dqbuf(&queue->queue, buf, nonblocking);
232 mutex_unlock(&queue->mutex);
237 int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma)
241 mutex_lock(&queue->mutex);
242 ret = vb2_mmap(&queue->queue, vma);
243 mutex_unlock(&queue->mutex);
249 unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
254 mutex_lock(&queue->mutex);
255 ret = vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);
256 mutex_unlock(&queue->mutex);
261 unsigned int uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
266 mutex_lock(&queue->mutex);
267 ret = vb2_poll(&queue->queue, file, wait);
268 mutex_unlock(&queue->mutex);
280 int uvc_queue_allocated(struct uvc_video_queue *queue)
284 mutex_lock(&queue->mutex);
285 allocated = vb2_is_busy(&queue->queue);
286 mutex_unlock(&queue->mutex);
292 * Enable or disable the video buffers queue.
294 * The queue must be enabled before starting video acquisition and must be
295 * disabled after stopping it. This ensures that the video buffers queue
299 * Enabling the video queue returns -EBUSY if the queue is already enabled.
301 * Disabling the video queue cancels the queue and removes all buffers from
302 * the main queue.
307 int uvc_queue_enable(struct uvc_video_queue *queue, int enable)
312 mutex_lock(&queue->mutex);
314 ret = vb2_streamon(&queue->queue, queue->queue.type);
318 queue->buf_used = 0;
320 ret = vb2_streamoff(&queue->queue, queue->queue.type);
324 spin_lock_irqsave(&queue->irqlock, flags);
325 INIT_LIST_HEAD(&queue->irqqueue);
326 spin_unlock_irqrestore(&queue->irqlock, flags);
330 mutex_unlock(&queue->mutex);
335 * Cancel the video buffers queue.
337 * Cancelling the queue marks all buffers on the irq queue as erroneous,
338 * wakes them up and removes them from the queue.
346 void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect)
351 spin_lock_irqsave(&queue->irqlock, flags);
352 while (!list_empty(&queue->irqqueue)) {
353 buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
354 queue);
355 list_del(&buf->queue);
363 * state outside the queue code.
366 queue->flags |= UVC_QUEUE_DISCONNECTED;
367 spin_unlock_irqrestore(&queue->irqlock, flags);
370 struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
376 if ((queue->flags & UVC_QUEUE_DROP_CORRUPTED) && buf->error) {
384 spin_lock_irqsave(&queue->irqlock, flags);
385 list_del(&buf->queue);
386 if (!list_empty(&queue->irqqueue))
387 nextbuf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
388 queue);
391 spin_unlock_irqrestore(&queue->irqlock, flags);