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);
63 struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
72 if (unlikely(queue->flags & UVC_QUEUE_DISCONNECTED))
89 struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
93 spin_lock_irqsave(&queue->irqlock, flags);
94 if (likely(!(queue->flags & UVC_QUEUE_DISCONNECTED))) {
95 list_add_tail(&buf->queue, &queue->irqqueue);
104 spin_unlock_irqrestore(&queue->irqlock, flags);
109 struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
111 container_of(queue, struct uvc_streaming, queue);
125 void uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
128 queue->queue.type = type;
129 queue->queue.io_modes = VB2_MMAP | VB2_USERPTR;
130 queue->queue.drv_priv = queue;
131 queue->queue.buf_struct_size = sizeof(struct uvc_buffer);
132 queue->queue.ops = &uvc_queue_qops;
133 queue->queue.mem_ops = &vb2_vmalloc_memops;
134 vb2_queue_init(&queue->queue);
136 mutex_init(&queue->mutex);
137 spin_lock_init(&queue->irqlock);
138 INIT_LIST_HEAD(&queue->irqqueue);
139 queue->flags = drop_corrupted ? UVC_QUEUE_DROP_CORRUPTED : 0;
143 * V4L2 queue operations
146 int uvc_alloc_buffers(struct uvc_video_queue *queue,
151 mutex_lock(&queue->mutex);
152 ret = vb2_reqbufs(&queue->queue, rb);
153 mutex_unlock(&queue->mutex);
158 void uvc_free_buffers(struct uvc_video_queue *queue)
160 mutex_lock(&queue->mutex);
161 vb2_queue_release(&queue->queue);
162 mutex_unlock(&queue->mutex);
165 int uvc_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
169 mutex_lock(&queue->mutex);
170 ret = vb2_querybuf(&queue->queue, buf);
171 mutex_unlock(&queue->mutex);
176 int uvc_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
180 mutex_lock(&queue->mutex);
181 ret = vb2_qbuf(&queue->queue, buf);
182 mutex_unlock(&queue->mutex);
187 int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf,
192 mutex_lock(&queue->mutex);
193 ret = vb2_dqbuf(&queue->queue, buf, nonblocking);
194 mutex_unlock(&queue->mutex);
199 int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma)
203 mutex_lock(&queue->mutex);
204 ret = vb2_mmap(&queue->queue, vma);
205 mutex_unlock(&queue->mutex);
210 unsigned int uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
215 mutex_lock(&queue->mutex);
216 ret = vb2_poll(&queue->queue, file, wait);
217 mutex_unlock(&queue->mutex);
229 int uvc_queue_allocated(struct uvc_video_queue *queue)
233 mutex_lock(&queue->mutex);
234 allocated = vb2_is_busy(&queue->queue);
235 mutex_unlock(&queue->mutex);
246 unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
253 mutex_lock(&queue->mutex);
254 for (i = 0; i < queue->count; ++i) {
255 buffer = &queue->buffer[i];
259 if (i == queue->count) {
265 mutex_unlock(&queue->mutex);
271 * Enable or disable the video buffers queue.
273 * The queue must be enabled before starting video acquisition and must be
274 * disabled after stopping it. This ensures that the video buffers queue
278 * Enabling the video queue returns -EBUSY if the queue is already enabled.
280 * Disabling the video queue cancels the queue and removes all buffers from
281 * the main queue.
286 int uvc_queue_enable(struct uvc_video_queue *queue, int enable)
291 mutex_lock(&queue->mutex);
293 ret = vb2_streamon(&queue->queue, queue->queue.type);
297 queue->buf_used = 0;
299 ret = vb2_streamoff(&queue->queue, queue->queue.type);
303 spin_lock_irqsave(&queue->irqlock, flags);
304 INIT_LIST_HEAD(&queue->irqqueue);
305 spin_unlock_irqrestore(&queue->irqlock, flags);
309 mutex_unlock(&queue->mutex);
314 * Cancel the video buffers queue.
316 * Cancelling the queue marks all buffers on the irq queue as erroneous,
317 * wakes them up and removes them from the queue.
325 void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect)
330 spin_lock_irqsave(&queue->irqlock, flags);
331 while (!list_empty(&queue->irqqueue)) {
332 buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
333 queue);
334 list_del(&buf->queue);
342 * state outside the queue code.
345 queue->flags |= UVC_QUEUE_DISCONNECTED;
346 spin_unlock_irqrestore(&queue->irqlock, flags);
349 struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
355 if ((queue->flags & UVC_QUEUE_DROP_CORRUPTED) && buf->error) {
362 spin_lock_irqsave(&queue->irqlock, flags);
363 list_del(&buf->queue);
364 if (!list_empty(&queue->irqqueue))
365 nextbuf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
366 queue);
369 spin_unlock_irqrestore(&queue->irqlock, flags);