50 #define CALL(q, f, arg...)						\  argument
51 	((q->int_ops->f) ? q->int_ops->f(arg) : 0)
52 #define CALLPTR(q, f, arg...)						\  argument
53 	((q->int_ops->f) ? q->int_ops->f(arg) : NULL)
55 struct videobuf_buffer *videobuf_alloc_vb(struct videobuf_queue *q)  in videobuf_alloc_vb()  argument
59 	BUG_ON(q->msize < sizeof(*vb));  in videobuf_alloc_vb()
61 	if (!q->int_ops || !q->int_ops->alloc_vb) {  in videobuf_alloc_vb()
66 	vb = q->int_ops->alloc_vb(q->msize);  in videobuf_alloc_vb()
76 static int state_neither_active_nor_queued(struct videobuf_queue *q,  in state_neither_active_nor_queued()  argument
82 	spin_lock_irqsave(q->irqlock, flags);  in state_neither_active_nor_queued()
84 	spin_unlock_irqrestore(q->irqlock, flags);  in state_neither_active_nor_queued()
88 int videobuf_waiton(struct videobuf_queue *q, struct videobuf_buffer *vb,  in videobuf_waiton()  argument
97 		if (state_neither_active_nor_queued(q, vb))  in videobuf_waiton()
102 	is_ext_locked = q->ext_lock && mutex_is_locked(q->ext_lock);  in videobuf_waiton()
107 		mutex_unlock(q->ext_lock);  in videobuf_waiton()
110 					state_neither_active_nor_queued(q, vb));  in videobuf_waiton()
112 		wait_event(vb->done, state_neither_active_nor_queued(q, vb));  in videobuf_waiton()
115 		mutex_lock(q->ext_lock);  in videobuf_waiton()
121 int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb,  in videobuf_iolock()  argument
125 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_iolock()
127 	return CALL(q, iolock, q, vb, fbuf);  in videobuf_iolock()
131 void *videobuf_queue_to_vaddr(struct videobuf_queue *q,  in videobuf_queue_to_vaddr()  argument
134 	if (q->int_ops->vaddr)  in videobuf_queue_to_vaddr()
135 		return q->int_ops->vaddr(buf);  in videobuf_queue_to_vaddr()
143 void videobuf_queue_core_init(struct videobuf_queue *q,  in videobuf_queue_core_init()  argument
154 	BUG_ON(!q);  in videobuf_queue_core_init()
155 	memset(q, 0, sizeof(*q));  in videobuf_queue_core_init()
156 	q->irqlock   = irqlock;  in videobuf_queue_core_init()
157 	q->ext_lock  = ext_lock;  in videobuf_queue_core_init()
158 	q->dev       = dev;  in videobuf_queue_core_init()
159 	q->type      = type;  in videobuf_queue_core_init()
160 	q->field     = field;  in videobuf_queue_core_init()
161 	q->msize     = msize;  in videobuf_queue_core_init()
162 	q->ops       = ops;  in videobuf_queue_core_init()
163 	q->priv_data = priv;  in videobuf_queue_core_init()
164 	q->int_ops   = int_ops;  in videobuf_queue_core_init()
167 	BUG_ON(!q->ops->buf_setup);  in videobuf_queue_core_init()
168 	BUG_ON(!q->ops->buf_prepare);  in videobuf_queue_core_init()
169 	BUG_ON(!q->ops->buf_queue);  in videobuf_queue_core_init()
170 	BUG_ON(!q->ops->buf_release);  in videobuf_queue_core_init()
176 	BUG_ON(!q->int_ops);  in videobuf_queue_core_init()
178 	mutex_init(&q->vb_lock);  in videobuf_queue_core_init()
179 	init_waitqueue_head(&q->wait);  in videobuf_queue_core_init()
180 	INIT_LIST_HEAD(&q->stream);  in videobuf_queue_core_init()
185 int videobuf_queue_is_busy(struct videobuf_queue *q)  in videobuf_queue_is_busy()  argument
189 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_queue_is_busy()
191 	if (q->streaming) {  in videobuf_queue_is_busy()
195 	if (q->reading) {  in videobuf_queue_is_busy()
199 	if (q->read_buf) {  in videobuf_queue_is_busy()
204 		if (NULL == q->bufs[i])  in videobuf_queue_is_busy()
206 		if (q->bufs[i]->map) {  in videobuf_queue_is_busy()
210 		if (q->bufs[i]->state == VIDEOBUF_QUEUED) {  in videobuf_queue_is_busy()
214 		if (q->bufs[i]->state == VIDEOBUF_ACTIVE) {  in videobuf_queue_is_busy()
230 static int __videobuf_free(struct videobuf_queue *q)  in __videobuf_free()  argument
235 	if (!q)  in __videobuf_free()
238 	if (q->streaming || q->reading) {  in __videobuf_free()
243 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in __videobuf_free()
246 		if (q->bufs[i] && q->bufs[i]->map) {  in __videobuf_free()
252 		if (NULL == q->bufs[i])  in __videobuf_free()
254 		q->ops->buf_release(q, q->bufs[i]);  in __videobuf_free()
255 		kfree(q->bufs[i]);  in __videobuf_free()
256 		q->bufs[i] = NULL;  in __videobuf_free()
263 void videobuf_queue_cancel(struct videobuf_queue *q)  in videobuf_queue_cancel()  argument
268 	q->streaming = 0;  in videobuf_queue_cancel()
269 	q->reading  = 0;  in videobuf_queue_cancel()
270 	wake_up_interruptible_sync(&q->wait);  in videobuf_queue_cancel()
273 	spin_lock_irqsave(q->irqlock, flags);  in videobuf_queue_cancel()
275 		if (NULL == q->bufs[i])  in videobuf_queue_cancel()
277 		if (q->bufs[i]->state == VIDEOBUF_QUEUED) {  in videobuf_queue_cancel()
278 			list_del(&q->bufs[i]->queue);  in videobuf_queue_cancel()
279 			q->bufs[i]->state = VIDEOBUF_ERROR;  in videobuf_queue_cancel()
280 			wake_up_all(&q->bufs[i]->done);  in videobuf_queue_cancel()
283 	spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_queue_cancel()
287 		if (NULL == q->bufs[i])  in videobuf_queue_cancel()
289 		q->ops->buf_release(q, q->bufs[i]);  in videobuf_queue_cancel()
291 	INIT_LIST_HEAD(&q->stream);  in videobuf_queue_cancel()
298 enum v4l2_field videobuf_next_field(struct videobuf_queue *q)  in videobuf_next_field()  argument
300 	enum v4l2_field field = q->field;  in videobuf_next_field()
305 		if (V4L2_FIELD_TOP == q->last) {  in videobuf_next_field()
307 			q->last = V4L2_FIELD_BOTTOM;  in videobuf_next_field()
310 			q->last = V4L2_FIELD_TOP;  in videobuf_next_field()
318 static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b,  in videobuf_status()  argument
322 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_status()
373 int videobuf_mmap_free(struct videobuf_queue *q)  in videobuf_mmap_free()  argument
376 	videobuf_queue_lock(q);  in videobuf_mmap_free()
377 	ret = __videobuf_free(q);  in videobuf_mmap_free()
378 	videobuf_queue_unlock(q);  in videobuf_mmap_free()
384 int __videobuf_mmap_setup(struct videobuf_queue *q,  in __videobuf_mmap_setup()  argument
391 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in __videobuf_mmap_setup()
393 	err = __videobuf_free(q);  in __videobuf_mmap_setup()
399 		q->bufs[i] = videobuf_alloc_vb(q);  in __videobuf_mmap_setup()
401 		if (NULL == q->bufs[i])  in __videobuf_mmap_setup()
404 		q->bufs[i]->i      = i;  in __videobuf_mmap_setup()
405 		q->bufs[i]->memory = memory;  in __videobuf_mmap_setup()
406 		q->bufs[i]->bsize  = bsize;  in __videobuf_mmap_setup()
409 			q->bufs[i]->boff = PAGE_ALIGN(bsize) * i;  in __videobuf_mmap_setup()
428 int videobuf_mmap_setup(struct videobuf_queue *q,  in videobuf_mmap_setup()  argument
433 	videobuf_queue_lock(q);  in videobuf_mmap_setup()
434 	ret = __videobuf_mmap_setup(q, bcount, bsize, memory);  in videobuf_mmap_setup()
435 	videobuf_queue_unlock(q);  in videobuf_mmap_setup()
440 int videobuf_reqbufs(struct videobuf_queue *q,  in videobuf_reqbufs()  argument
453 	videobuf_queue_lock(q);  in videobuf_reqbufs()
454 	if (req->type != q->type) {  in videobuf_reqbufs()
460 	if (q->streaming) {  in videobuf_reqbufs()
465 	if (!list_empty(&q->stream)) {  in videobuf_reqbufs()
473 		retval = __videobuf_free(q);  in videobuf_reqbufs()
481 	q->ops->buf_setup(q, &count, &size);  in videobuf_reqbufs()
486 	retval = __videobuf_mmap_setup(q, count, size, req->memory);  in videobuf_reqbufs()
496 	videobuf_queue_unlock(q);  in videobuf_reqbufs()
501 int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b)  in videobuf_querybuf()  argument
505 	videobuf_queue_lock(q);  in videobuf_querybuf()
506 	if (unlikely(b->type != q->type)) {  in videobuf_querybuf()
514 	if (unlikely(NULL == q->bufs[b->index])) {  in videobuf_querybuf()
519 	videobuf_status(q, b, q->bufs[b->index], q->type);  in videobuf_querybuf()
523 	videobuf_queue_unlock(q);  in videobuf_querybuf()
528 int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b)  in videobuf_qbuf()  argument
535 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_qbuf()
540 	videobuf_queue_lock(q);  in videobuf_qbuf()
542 	if (q->reading) {  in videobuf_qbuf()
547 	if (b->type != q->type) {  in videobuf_qbuf()
555 	buf = q->bufs[b->index];  in videobuf_qbuf()
576 		if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT  in videobuf_qbuf()
577 		    || q->type == V4L2_BUF_TYPE_VBI_OUTPUT  in videobuf_qbuf()
578 		    || q->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT  in videobuf_qbuf()
579 		    || q->type == V4L2_BUF_TYPE_SDR_OUTPUT) {  in videobuf_qbuf()
592 			q->ops->buf_release(q, buf);  in videobuf_qbuf()
604 	field = videobuf_next_field(q);  in videobuf_qbuf()
605 	retval = q->ops->buf_prepare(q, buf, field);  in videobuf_qbuf()
611 	list_add_tail(&buf->stream, &q->stream);  in videobuf_qbuf()
612 	if (q->streaming) {  in videobuf_qbuf()
613 		spin_lock_irqsave(q->irqlock, flags);  in videobuf_qbuf()
614 		q->ops->buf_queue(q, buf);  in videobuf_qbuf()
615 		spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_qbuf()
619 	wake_up_interruptible_sync(&q->wait);  in videobuf_qbuf()
622 	videobuf_queue_unlock(q);  in videobuf_qbuf()
632 static int stream_next_buffer_check_queue(struct videobuf_queue *q, int noblock)  in stream_next_buffer_check_queue()  argument
637 	if (!q->streaming) {  in stream_next_buffer_check_queue()
643 	if (list_empty(&q->stream)) {  in stream_next_buffer_check_queue()
652 			videobuf_queue_unlock(q);  in stream_next_buffer_check_queue()
657 			retval = wait_event_interruptible(q->wait,  in stream_next_buffer_check_queue()
658 				!list_empty(&q->stream) || !q->streaming);  in stream_next_buffer_check_queue()
659 			videobuf_queue_lock(q);  in stream_next_buffer_check_queue()
675 static int stream_next_buffer(struct videobuf_queue *q,  in stream_next_buffer()  argument
681 	retval = stream_next_buffer_check_queue(q, nonblocking);  in stream_next_buffer()
685 	buf = list_entry(q->stream.next, struct videobuf_buffer, stream);  in stream_next_buffer()
686 	retval = videobuf_waiton(q, buf, nonblocking, 1);  in stream_next_buffer()
695 int videobuf_dqbuf(struct videobuf_queue *q,  in videobuf_dqbuf()  argument
701 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_dqbuf()
704 	videobuf_queue_lock(q);  in videobuf_dqbuf()
706 	retval = stream_next_buffer(q, &buf, nonblocking);  in videobuf_dqbuf()
724 	CALL(q, sync, q, buf);  in videobuf_dqbuf()
725 	videobuf_status(q, b, buf, q->type);  in videobuf_dqbuf()
730 	videobuf_queue_unlock(q);  in videobuf_dqbuf()
735 int videobuf_streamon(struct videobuf_queue *q)  in videobuf_streamon()  argument
741 	videobuf_queue_lock(q);  in videobuf_streamon()
743 	if (q->reading)  in videobuf_streamon()
746 	if (q->streaming)  in videobuf_streamon()
748 	q->streaming = 1;  in videobuf_streamon()
749 	spin_lock_irqsave(q->irqlock, flags);  in videobuf_streamon()
750 	list_for_each_entry(buf, &q->stream, stream)  in videobuf_streamon()
752 			q->ops->buf_queue(q, buf);  in videobuf_streamon()
753 	spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_streamon()
755 	wake_up_interruptible_sync(&q->wait);  in videobuf_streamon()
757 	videobuf_queue_unlock(q);  in videobuf_streamon()
763 static int __videobuf_streamoff(struct videobuf_queue *q)  in __videobuf_streamoff()  argument
765 	if (!q->streaming)  in __videobuf_streamoff()
768 	videobuf_queue_cancel(q);  in __videobuf_streamoff()
773 int videobuf_streamoff(struct videobuf_queue *q)  in videobuf_streamoff()  argument
777 	videobuf_queue_lock(q);  in videobuf_streamoff()
778 	retval = __videobuf_streamoff(q);  in videobuf_streamoff()
779 	videobuf_queue_unlock(q);  in videobuf_streamoff()
786 static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q,  in videobuf_read_zerocopy()  argument
794 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_read_zerocopy()
797 	q->read_buf = videobuf_alloc_vb(q);  in videobuf_read_zerocopy()
798 	if (NULL == q->read_buf)  in videobuf_read_zerocopy()
801 	q->read_buf->memory = V4L2_MEMORY_USERPTR;  in videobuf_read_zerocopy()
802 	q->read_buf->baddr  = (unsigned long)data;  in videobuf_read_zerocopy()
803 	q->read_buf->bsize  = count;  in videobuf_read_zerocopy()
805 	field = videobuf_next_field(q);  in videobuf_read_zerocopy()
806 	retval = q->ops->buf_prepare(q, q->read_buf, field);  in videobuf_read_zerocopy()
811 	spin_lock_irqsave(q->irqlock, flags);  in videobuf_read_zerocopy()
812 	q->ops->buf_queue(q, q->read_buf);  in videobuf_read_zerocopy()
813 	spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_read_zerocopy()
814 	retval = videobuf_waiton(q, q->read_buf, 0, 0);  in videobuf_read_zerocopy()
816 		CALL(q, sync, q, q->read_buf);  in videobuf_read_zerocopy()
817 		if (VIDEOBUF_ERROR == q->read_buf->state)  in videobuf_read_zerocopy()
820 			retval = q->read_buf->size;  in videobuf_read_zerocopy()
825 	q->ops->buf_release(q, q->read_buf);  in videobuf_read_zerocopy()
826 	kfree(q->read_buf);  in videobuf_read_zerocopy()
827 	q->read_buf = NULL;  in videobuf_read_zerocopy()
831 static int __videobuf_copy_to_user(struct videobuf_queue *q,  in __videobuf_copy_to_user()  argument
836 	void *vaddr = CALLPTR(q, vaddr, buf);  in __videobuf_copy_to_user()
839 	if (count > buf->size - q->read_off)  in __videobuf_copy_to_user()
840 		count = buf->size - q->read_off;  in __videobuf_copy_to_user()
842 	if (copy_to_user(data, vaddr + q->read_off, count))  in __videobuf_copy_to_user()
848 static int __videobuf_copy_stream(struct videobuf_queue *q,  in __videobuf_copy_stream()  argument
853 	unsigned int *fc = CALLPTR(q, vaddr, buf);  in __videobuf_copy_stream()
866 	count = __videobuf_copy_to_user(q, buf, data, count, nonblocking);  in __videobuf_copy_stream()
874 ssize_t videobuf_read_one(struct videobuf_queue *q,  in videobuf_read_one()  argument
883 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_read_one()
885 	videobuf_queue_lock(q);  in videobuf_read_one()
887 	q->ops->buf_setup(q, &nbufs, &size);  in videobuf_read_one()
889 	if (NULL == q->read_buf  &&  in videobuf_read_one()
892 		retval = videobuf_read_zerocopy(q, data, count, ppos);  in videobuf_read_one()
899 	if (NULL == q->read_buf) {  in videobuf_read_one()
902 		q->read_buf = videobuf_alloc_vb(q);  in videobuf_read_one()
904 		dprintk(1, "video alloc=0x%p\n", q->read_buf);  in videobuf_read_one()
905 		if (NULL == q->read_buf)  in videobuf_read_one()
907 		q->read_buf->memory = V4L2_MEMORY_USERPTR;  in videobuf_read_one()
908 		q->read_buf->bsize = count; /* preferred size */  in videobuf_read_one()
909 		field = videobuf_next_field(q);  in videobuf_read_one()
910 		retval = q->ops->buf_prepare(q, q->read_buf, field);  in videobuf_read_one()
913 			kfree(q->read_buf);  in videobuf_read_one()
914 			q->read_buf = NULL;  in videobuf_read_one()
918 		spin_lock_irqsave(q->irqlock, flags);  in videobuf_read_one()
919 		q->ops->buf_queue(q, q->read_buf);  in videobuf_read_one()
920 		spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_read_one()
922 		q->read_off = 0;  in videobuf_read_one()
926 	retval = videobuf_waiton(q, q->read_buf, nonblocking, 1);  in videobuf_read_one()
930 	CALL(q, sync, q, q->read_buf);  in videobuf_read_one()
932 	if (VIDEOBUF_ERROR == q->read_buf->state) {  in videobuf_read_one()
934 		q->ops->buf_release(q, q->read_buf);  in videobuf_read_one()
935 		kfree(q->read_buf);  in videobuf_read_one()
936 		q->read_buf = NULL;  in videobuf_read_one()
942 	retval = __videobuf_copy_to_user(q, q->read_buf, data, count, nonblocking);  in videobuf_read_one()
946 	q->read_off += retval;  in videobuf_read_one()
947 	if (q->read_off == q->read_buf->size) {  in videobuf_read_one()
949 		q->ops->buf_release(q, q->read_buf);  in videobuf_read_one()
950 		kfree(q->read_buf);  in videobuf_read_one()
951 		q->read_buf = NULL;  in videobuf_read_one()
955 	videobuf_queue_unlock(q);  in videobuf_read_one()
961 static int __videobuf_read_start(struct videobuf_queue *q)  in __videobuf_read_start()  argument
968 	q->ops->buf_setup(q, &count, &size);  in __videobuf_read_start()
975 	err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR);  in __videobuf_read_start()
982 		field = videobuf_next_field(q);  in __videobuf_read_start()
983 		err = q->ops->buf_prepare(q, q->bufs[i], field);  in __videobuf_read_start()
986 		list_add_tail(&q->bufs[i]->stream, &q->stream);  in __videobuf_read_start()
988 	spin_lock_irqsave(q->irqlock, flags);  in __videobuf_read_start()
990 		q->ops->buf_queue(q, q->bufs[i]);  in __videobuf_read_start()
991 	spin_unlock_irqrestore(q->irqlock, flags);  in __videobuf_read_start()
992 	q->reading = 1;  in __videobuf_read_start()
996 static void __videobuf_read_stop(struct videobuf_queue *q)  in __videobuf_read_stop()  argument
1000 	videobuf_queue_cancel(q);  in __videobuf_read_stop()
1001 	__videobuf_free(q);  in __videobuf_read_stop()
1002 	INIT_LIST_HEAD(&q->stream);  in __videobuf_read_stop()
1004 		if (NULL == q->bufs[i])  in __videobuf_read_stop()
1006 		kfree(q->bufs[i]);  in __videobuf_read_stop()
1007 		q->bufs[i] = NULL;  in __videobuf_read_stop()
1009 	q->read_buf = NULL;  in __videobuf_read_stop()
1012 int videobuf_read_start(struct videobuf_queue *q)  in videobuf_read_start()  argument
1016 	videobuf_queue_lock(q);  in videobuf_read_start()
1017 	rc = __videobuf_read_start(q);  in videobuf_read_start()
1018 	videobuf_queue_unlock(q);  in videobuf_read_start()
1024 void videobuf_read_stop(struct videobuf_queue *q)  in videobuf_read_stop()  argument
1026 	videobuf_queue_lock(q);  in videobuf_read_stop()
1027 	__videobuf_read_stop(q);  in videobuf_read_stop()
1028 	videobuf_queue_unlock(q);  in videobuf_read_stop()
1032 void videobuf_stop(struct videobuf_queue *q)  in videobuf_stop()  argument
1034 	videobuf_queue_lock(q);  in videobuf_stop()
1036 	if (q->streaming)  in videobuf_stop()
1037 		__videobuf_streamoff(q);  in videobuf_stop()
1039 	if (q->reading)  in videobuf_stop()
1040 		__videobuf_read_stop(q);  in videobuf_stop()
1042 	videobuf_queue_unlock(q);  in videobuf_stop()
1046 ssize_t videobuf_read_stream(struct videobuf_queue *q,  in videobuf_read_stream()  argument
1053 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_read_stream()
1056 	videobuf_queue_lock(q);  in videobuf_read_stream()
1058 	if (q->streaming)  in videobuf_read_stream()
1060 	if (!q->reading) {  in videobuf_read_stream()
1061 		retval = __videobuf_read_start(q);  in videobuf_read_stream()
1069 		if (NULL == q->read_buf) {  in videobuf_read_stream()
1070 			q->read_buf = list_entry(q->stream.next,  in videobuf_read_stream()
1073 			list_del(&q->read_buf->stream);  in videobuf_read_stream()
1074 			q->read_off = 0;  in videobuf_read_stream()
1076 		rc = videobuf_waiton(q, q->read_buf, nonblocking, 1);  in videobuf_read_stream()
1083 		if (q->read_buf->state == VIDEOBUF_DONE) {  in videobuf_read_stream()
1084 			rc = __videobuf_copy_stream(q, q->read_buf, data + retval, count,  in videobuf_read_stream()
1092 			q->read_off += rc;  in videobuf_read_stream()
1095 			q->read_off = q->read_buf->size;  in videobuf_read_stream()
1101 		if (q->read_off == q->read_buf->size) {  in videobuf_read_stream()
1102 			list_add_tail(&q->read_buf->stream,  in videobuf_read_stream()
1103 				      &q->stream);  in videobuf_read_stream()
1104 			spin_lock_irqsave(q->irqlock, flags);  in videobuf_read_stream()
1105 			q->ops->buf_queue(q, q->read_buf);  in videobuf_read_stream()
1106 			spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_read_stream()
1107 			q->read_buf = NULL;  in videobuf_read_stream()
1114 	videobuf_queue_unlock(q);  in videobuf_read_stream()
1120 			      struct videobuf_queue *q,  in videobuf_poll_stream()  argument
1127 	videobuf_queue_lock(q);  in videobuf_poll_stream()
1128 	if (q->streaming) {  in videobuf_poll_stream()
1129 		if (!list_empty(&q->stream))  in videobuf_poll_stream()
1130 			buf = list_entry(q->stream.next,  in videobuf_poll_stream()
1133 		if (!q->reading)  in videobuf_poll_stream()
1134 			__videobuf_read_start(q);  in videobuf_poll_stream()
1135 		if (!q->reading) {  in videobuf_poll_stream()
1137 		} else if (NULL == q->read_buf) {  in videobuf_poll_stream()
1138 			q->read_buf = list_entry(q->stream.next,  in videobuf_poll_stream()
1141 			list_del(&q->read_buf->stream);  in videobuf_poll_stream()
1142 			q->read_off = 0;  in videobuf_poll_stream()
1144 		buf = q->read_buf;  in videobuf_poll_stream()
1154 			switch (q->type) {  in videobuf_poll_stream()
1167 	videobuf_queue_unlock(q);  in videobuf_poll_stream()
1172 int videobuf_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma)  in videobuf_mmap_mapper()  argument
1177 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_mmap_mapper()
1184 	videobuf_queue_lock(q);  in videobuf_mmap_mapper()
1186 		struct videobuf_buffer *buf = q->bufs[i];  in videobuf_mmap_mapper()
1190 			rc = CALL(q, mmap_mapper, q, buf, vma);  in videobuf_mmap_mapper()
1194 	videobuf_queue_unlock(q);  in videobuf_mmap_mapper()