52 #define CALL(q, f, arg...)						\  argument
53 	((q->int_ops->f) ? q->int_ops->f(arg) : 0)
54 #define CALLPTR(q, f, arg...)						\  argument
55 	((q->int_ops->f) ? q->int_ops->f(arg) : NULL)
57 struct videobuf_buffer *videobuf_alloc_vb(struct videobuf_queue *q)  in videobuf_alloc_vb()  argument
61 	BUG_ON(q->msize < sizeof(*vb));  in videobuf_alloc_vb()
63 	if (!q->int_ops || !q->int_ops->alloc_vb) {  in videobuf_alloc_vb()
68 	vb = q->int_ops->alloc_vb(q->msize);  in videobuf_alloc_vb()
78 static int state_neither_active_nor_queued(struct videobuf_queue *q,  in state_neither_active_nor_queued()  argument
84 	spin_lock_irqsave(q->irqlock, flags);  in state_neither_active_nor_queued()
86 	spin_unlock_irqrestore(q->irqlock, flags);  in state_neither_active_nor_queued()
90 int videobuf_waiton(struct videobuf_queue *q, struct videobuf_buffer *vb,  in videobuf_waiton()  argument
99 		if (state_neither_active_nor_queued(q, vb))  in videobuf_waiton()
104 	is_ext_locked = q->ext_lock && mutex_is_locked(q->ext_lock);  in videobuf_waiton()
109 		mutex_unlock(q->ext_lock);  in videobuf_waiton()
112 					state_neither_active_nor_queued(q, vb));  in videobuf_waiton()
114 		wait_event(vb->done, state_neither_active_nor_queued(q, vb));  in videobuf_waiton()
117 		mutex_lock(q->ext_lock);  in videobuf_waiton()
123 int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb,  in videobuf_iolock()  argument
127 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_iolock()
129 	return CALL(q, iolock, q, vb, fbuf);  in videobuf_iolock()
133 void *videobuf_queue_to_vaddr(struct videobuf_queue *q,  in videobuf_queue_to_vaddr()  argument
136 	if (q->int_ops->vaddr)  in videobuf_queue_to_vaddr()
137 		return q->int_ops->vaddr(buf);  in videobuf_queue_to_vaddr()
145 void videobuf_queue_core_init(struct videobuf_queue *q,  in videobuf_queue_core_init()  argument
156 	BUG_ON(!q);  in videobuf_queue_core_init()
157 	memset(q, 0, sizeof(*q));  in videobuf_queue_core_init()
158 	q->irqlock   = irqlock;  in videobuf_queue_core_init()
159 	q->ext_lock  = ext_lock;  in videobuf_queue_core_init()
160 	q->dev       = dev;  in videobuf_queue_core_init()
161 	q->type      = type;  in videobuf_queue_core_init()
162 	q->field     = field;  in videobuf_queue_core_init()
163 	q->msize     = msize;  in videobuf_queue_core_init()
164 	q->ops       = ops;  in videobuf_queue_core_init()
165 	q->priv_data = priv;  in videobuf_queue_core_init()
166 	q->int_ops   = int_ops;  in videobuf_queue_core_init()
169 	BUG_ON(!q->ops->buf_setup);  in videobuf_queue_core_init()
170 	BUG_ON(!q->ops->buf_prepare);  in videobuf_queue_core_init()
171 	BUG_ON(!q->ops->buf_queue);  in videobuf_queue_core_init()
172 	BUG_ON(!q->ops->buf_release);  in videobuf_queue_core_init()
178 	BUG_ON(!q->int_ops);  in videobuf_queue_core_init()
180 	mutex_init(&q->vb_lock);  in videobuf_queue_core_init()
181 	init_waitqueue_head(&q->wait);  in videobuf_queue_core_init()
182 	INIT_LIST_HEAD(&q->stream);  in videobuf_queue_core_init()
187 int videobuf_queue_is_busy(struct videobuf_queue *q)  in videobuf_queue_is_busy()  argument
191 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_queue_is_busy()
193 	if (q->streaming) {  in videobuf_queue_is_busy()
197 	if (q->reading) {  in videobuf_queue_is_busy()
201 	if (q->read_buf) {  in videobuf_queue_is_busy()
206 		if (NULL == q->bufs[i])  in videobuf_queue_is_busy()
208 		if (q->bufs[i]->map) {  in videobuf_queue_is_busy()
212 		if (q->bufs[i]->state == VIDEOBUF_QUEUED) {  in videobuf_queue_is_busy()
216 		if (q->bufs[i]->state == VIDEOBUF_ACTIVE) {  in videobuf_queue_is_busy()
232 static int __videobuf_free(struct videobuf_queue *q)  in __videobuf_free()  argument
237 	if (!q)  in __videobuf_free()
240 	if (q->streaming || q->reading) {  in __videobuf_free()
245 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in __videobuf_free()
248 		if (q->bufs[i] && q->bufs[i]->map) {  in __videobuf_free()
254 		if (NULL == q->bufs[i])  in __videobuf_free()
256 		q->ops->buf_release(q, q->bufs[i]);  in __videobuf_free()
257 		kfree(q->bufs[i]);  in __videobuf_free()
258 		q->bufs[i] = NULL;  in __videobuf_free()
265 void videobuf_queue_cancel(struct videobuf_queue *q)  in videobuf_queue_cancel()  argument
270 	q->streaming = 0;  in videobuf_queue_cancel()
271 	q->reading  = 0;  in videobuf_queue_cancel()
272 	wake_up_interruptible_sync(&q->wait);  in videobuf_queue_cancel()
275 	spin_lock_irqsave(q->irqlock, flags);  in videobuf_queue_cancel()
277 		if (NULL == q->bufs[i])  in videobuf_queue_cancel()
279 		if (q->bufs[i]->state == VIDEOBUF_QUEUED) {  in videobuf_queue_cancel()
280 			list_del(&q->bufs[i]->queue);  in videobuf_queue_cancel()
281 			q->bufs[i]->state = VIDEOBUF_ERROR;  in videobuf_queue_cancel()
282 			wake_up_all(&q->bufs[i]->done);  in videobuf_queue_cancel()
285 	spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_queue_cancel()
289 		if (NULL == q->bufs[i])  in videobuf_queue_cancel()
291 		q->ops->buf_release(q, q->bufs[i]);  in videobuf_queue_cancel()
293 	INIT_LIST_HEAD(&q->stream);  in videobuf_queue_cancel()
300 enum v4l2_field videobuf_next_field(struct videobuf_queue *q)  in videobuf_next_field()  argument
302 	enum v4l2_field field = q->field;  in videobuf_next_field()
307 		if (V4L2_FIELD_TOP == q->last) {  in videobuf_next_field()
309 			q->last = V4L2_FIELD_BOTTOM;  in videobuf_next_field()
312 			q->last = V4L2_FIELD_TOP;  in videobuf_next_field()
320 static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b,  in videobuf_status()  argument
324 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_status()
375 int videobuf_mmap_free(struct videobuf_queue *q)  in videobuf_mmap_free()  argument
378 	videobuf_queue_lock(q);  in videobuf_mmap_free()
379 	ret = __videobuf_free(q);  in videobuf_mmap_free()
380 	videobuf_queue_unlock(q);  in videobuf_mmap_free()
386 int __videobuf_mmap_setup(struct videobuf_queue *q,  in __videobuf_mmap_setup()  argument
393 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in __videobuf_mmap_setup()
395 	err = __videobuf_free(q);  in __videobuf_mmap_setup()
401 		q->bufs[i] = videobuf_alloc_vb(q);  in __videobuf_mmap_setup()
403 		if (NULL == q->bufs[i])  in __videobuf_mmap_setup()
406 		q->bufs[i]->i      = i;  in __videobuf_mmap_setup()
407 		q->bufs[i]->memory = memory;  in __videobuf_mmap_setup()
408 		q->bufs[i]->bsize  = bsize;  in __videobuf_mmap_setup()
411 			q->bufs[i]->boff = PAGE_ALIGN(bsize) * i;  in __videobuf_mmap_setup()
430 int videobuf_mmap_setup(struct videobuf_queue *q,  in videobuf_mmap_setup()  argument
435 	videobuf_queue_lock(q);  in videobuf_mmap_setup()
436 	ret = __videobuf_mmap_setup(q, bcount, bsize, memory);  in videobuf_mmap_setup()
437 	videobuf_queue_unlock(q);  in videobuf_mmap_setup()
442 int videobuf_reqbufs(struct videobuf_queue *q,  in videobuf_reqbufs()  argument
455 	videobuf_queue_lock(q);  in videobuf_reqbufs()
456 	if (req->type != q->type) {  in videobuf_reqbufs()
462 	if (q->streaming) {  in videobuf_reqbufs()
467 	if (!list_empty(&q->stream)) {  in videobuf_reqbufs()
475 		retval = __videobuf_free(q);  in videobuf_reqbufs()
483 	q->ops->buf_setup(q, &count, &size);  in videobuf_reqbufs()
488 	retval = __videobuf_mmap_setup(q, count, size, req->memory);  in videobuf_reqbufs()
498 	videobuf_queue_unlock(q);  in videobuf_reqbufs()
503 int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b)  in videobuf_querybuf()  argument
507 	videobuf_queue_lock(q);  in videobuf_querybuf()
508 	if (unlikely(b->type != q->type)) {  in videobuf_querybuf()
516 	if (unlikely(NULL == q->bufs[b->index])) {  in videobuf_querybuf()
521 	videobuf_status(q, b, q->bufs[b->index], q->type);  in videobuf_querybuf()
525 	videobuf_queue_unlock(q);  in videobuf_querybuf()
530 int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b)  in videobuf_qbuf()  argument
537 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_qbuf()
542 	videobuf_queue_lock(q);  in videobuf_qbuf()
544 	if (q->reading) {  in videobuf_qbuf()
549 	if (b->type != q->type) {  in videobuf_qbuf()
557 	buf = q->bufs[b->index];  in videobuf_qbuf()
578 		if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT  in videobuf_qbuf()
579 		    || q->type == V4L2_BUF_TYPE_VBI_OUTPUT  in videobuf_qbuf()
580 		    || q->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT  in videobuf_qbuf()
581 		    || q->type == V4L2_BUF_TYPE_SDR_OUTPUT) {  in videobuf_qbuf()
594 			q->ops->buf_release(q, buf);  in videobuf_qbuf()
606 	field = videobuf_next_field(q);  in videobuf_qbuf()
607 	retval = q->ops->buf_prepare(q, buf, field);  in videobuf_qbuf()
613 	list_add_tail(&buf->stream, &q->stream);  in videobuf_qbuf()
614 	if (q->streaming) {  in videobuf_qbuf()
615 		spin_lock_irqsave(q->irqlock, flags);  in videobuf_qbuf()
616 		q->ops->buf_queue(q, buf);  in videobuf_qbuf()
617 		spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_qbuf()
621 	wake_up_interruptible_sync(&q->wait);  in videobuf_qbuf()
624 	videobuf_queue_unlock(q);  in videobuf_qbuf()
634 static int stream_next_buffer_check_queue(struct videobuf_queue *q, int noblock)  in stream_next_buffer_check_queue()  argument
639 	if (!q->streaming) {  in stream_next_buffer_check_queue()
645 	if (list_empty(&q->stream)) {  in stream_next_buffer_check_queue()
654 			videobuf_queue_unlock(q);  in stream_next_buffer_check_queue()
659 			retval = wait_event_interruptible(q->wait,  in stream_next_buffer_check_queue()
660 				!list_empty(&q->stream) || !q->streaming);  in stream_next_buffer_check_queue()
661 			videobuf_queue_lock(q);  in stream_next_buffer_check_queue()
677 static int stream_next_buffer(struct videobuf_queue *q,  in stream_next_buffer()  argument
683 	retval = stream_next_buffer_check_queue(q, nonblocking);  in stream_next_buffer()
687 	buf = list_entry(q->stream.next, struct videobuf_buffer, stream);  in stream_next_buffer()
688 	retval = videobuf_waiton(q, buf, nonblocking, 1);  in stream_next_buffer()
697 int videobuf_dqbuf(struct videobuf_queue *q,  in videobuf_dqbuf()  argument
703 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_dqbuf()
706 	videobuf_queue_lock(q);  in videobuf_dqbuf()
708 	retval = stream_next_buffer(q, &buf, nonblocking);  in videobuf_dqbuf()
726 	CALL(q, sync, q, buf);  in videobuf_dqbuf()
727 	videobuf_status(q, b, buf, q->type);  in videobuf_dqbuf()
732 	videobuf_queue_unlock(q);  in videobuf_dqbuf()
737 int videobuf_streamon(struct videobuf_queue *q)  in videobuf_streamon()  argument
743 	videobuf_queue_lock(q);  in videobuf_streamon()
745 	if (q->reading)  in videobuf_streamon()
748 	if (q->streaming)  in videobuf_streamon()
750 	q->streaming = 1;  in videobuf_streamon()
751 	spin_lock_irqsave(q->irqlock, flags);  in videobuf_streamon()
752 	list_for_each_entry(buf, &q->stream, stream)  in videobuf_streamon()
754 			q->ops->buf_queue(q, buf);  in videobuf_streamon()
755 	spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_streamon()
757 	wake_up_interruptible_sync(&q->wait);  in videobuf_streamon()
759 	videobuf_queue_unlock(q);  in videobuf_streamon()
765 static int __videobuf_streamoff(struct videobuf_queue *q)  in __videobuf_streamoff()  argument
767 	if (!q->streaming)  in __videobuf_streamoff()
770 	videobuf_queue_cancel(q);  in __videobuf_streamoff()
775 int videobuf_streamoff(struct videobuf_queue *q)  in videobuf_streamoff()  argument
779 	videobuf_queue_lock(q);  in videobuf_streamoff()
780 	retval = __videobuf_streamoff(q);  in videobuf_streamoff()
781 	videobuf_queue_unlock(q);  in videobuf_streamoff()
788 static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q,  in videobuf_read_zerocopy()  argument
796 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_read_zerocopy()
799 	q->read_buf = videobuf_alloc_vb(q);  in videobuf_read_zerocopy()
800 	if (NULL == q->read_buf)  in videobuf_read_zerocopy()
803 	q->read_buf->memory = V4L2_MEMORY_USERPTR;  in videobuf_read_zerocopy()
804 	q->read_buf->baddr  = (unsigned long)data;  in videobuf_read_zerocopy()
805 	q->read_buf->bsize  = count;  in videobuf_read_zerocopy()
807 	field = videobuf_next_field(q);  in videobuf_read_zerocopy()
808 	retval = q->ops->buf_prepare(q, q->read_buf, field);  in videobuf_read_zerocopy()
813 	spin_lock_irqsave(q->irqlock, flags);  in videobuf_read_zerocopy()
814 	q->ops->buf_queue(q, q->read_buf);  in videobuf_read_zerocopy()
815 	spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_read_zerocopy()
816 	retval = videobuf_waiton(q, q->read_buf, 0, 0);  in videobuf_read_zerocopy()
818 		CALL(q, sync, q, q->read_buf);  in videobuf_read_zerocopy()
819 		if (VIDEOBUF_ERROR == q->read_buf->state)  in videobuf_read_zerocopy()
822 			retval = q->read_buf->size;  in videobuf_read_zerocopy()
827 	q->ops->buf_release(q, q->read_buf);  in videobuf_read_zerocopy()
828 	kfree(q->read_buf);  in videobuf_read_zerocopy()
829 	q->read_buf = NULL;  in videobuf_read_zerocopy()
833 static int __videobuf_copy_to_user(struct videobuf_queue *q,  in __videobuf_copy_to_user()  argument
838 	void *vaddr = CALLPTR(q, vaddr, buf);  in __videobuf_copy_to_user()
841 	if (count > buf->size - q->read_off)  in __videobuf_copy_to_user()
842 		count = buf->size - q->read_off;  in __videobuf_copy_to_user()
844 	if (copy_to_user(data, vaddr + q->read_off, count))  in __videobuf_copy_to_user()
850 static int __videobuf_copy_stream(struct videobuf_queue *q,  in __videobuf_copy_stream()  argument
855 	unsigned int *fc = CALLPTR(q, vaddr, buf);  in __videobuf_copy_stream()
868 	count = __videobuf_copy_to_user(q, buf, data, count, nonblocking);  in __videobuf_copy_stream()
876 ssize_t videobuf_read_one(struct videobuf_queue *q,  in videobuf_read_one()  argument
885 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_read_one()
887 	videobuf_queue_lock(q);  in videobuf_read_one()
889 	q->ops->buf_setup(q, &nbufs, &size);  in videobuf_read_one()
891 	if (NULL == q->read_buf  &&  in videobuf_read_one()
894 		retval = videobuf_read_zerocopy(q, data, count, ppos);  in videobuf_read_one()
901 	if (NULL == q->read_buf) {  in videobuf_read_one()
904 		q->read_buf = videobuf_alloc_vb(q);  in videobuf_read_one()
906 		dprintk(1, "video alloc=0x%p\n", q->read_buf);  in videobuf_read_one()
907 		if (NULL == q->read_buf)  in videobuf_read_one()
909 		q->read_buf->memory = V4L2_MEMORY_USERPTR;  in videobuf_read_one()
910 		q->read_buf->bsize = count; /* preferred size */  in videobuf_read_one()
911 		field = videobuf_next_field(q);  in videobuf_read_one()
912 		retval = q->ops->buf_prepare(q, q->read_buf, field);  in videobuf_read_one()
915 			kfree(q->read_buf);  in videobuf_read_one()
916 			q->read_buf = NULL;  in videobuf_read_one()
920 		spin_lock_irqsave(q->irqlock, flags);  in videobuf_read_one()
921 		q->ops->buf_queue(q, q->read_buf);  in videobuf_read_one()
922 		spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_read_one()
924 		q->read_off = 0;  in videobuf_read_one()
928 	retval = videobuf_waiton(q, q->read_buf, nonblocking, 1);  in videobuf_read_one()
932 	CALL(q, sync, q, q->read_buf);  in videobuf_read_one()
934 	if (VIDEOBUF_ERROR == q->read_buf->state) {  in videobuf_read_one()
936 		q->ops->buf_release(q, q->read_buf);  in videobuf_read_one()
937 		kfree(q->read_buf);  in videobuf_read_one()
938 		q->read_buf = NULL;  in videobuf_read_one()
944 	retval = __videobuf_copy_to_user(q, q->read_buf, data, count, nonblocking);  in videobuf_read_one()
948 	q->read_off += retval;  in videobuf_read_one()
949 	if (q->read_off == q->read_buf->size) {  in videobuf_read_one()
951 		q->ops->buf_release(q, q->read_buf);  in videobuf_read_one()
952 		kfree(q->read_buf);  in videobuf_read_one()
953 		q->read_buf = NULL;  in videobuf_read_one()
957 	videobuf_queue_unlock(q);  in videobuf_read_one()
963 static int __videobuf_read_start(struct videobuf_queue *q)  in __videobuf_read_start()  argument
970 	q->ops->buf_setup(q, &count, &size);  in __videobuf_read_start()
977 	err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR);  in __videobuf_read_start()
984 		field = videobuf_next_field(q);  in __videobuf_read_start()
985 		err = q->ops->buf_prepare(q, q->bufs[i], field);  in __videobuf_read_start()
988 		list_add_tail(&q->bufs[i]->stream, &q->stream);  in __videobuf_read_start()
990 	spin_lock_irqsave(q->irqlock, flags);  in __videobuf_read_start()
992 		q->ops->buf_queue(q, q->bufs[i]);  in __videobuf_read_start()
993 	spin_unlock_irqrestore(q->irqlock, flags);  in __videobuf_read_start()
994 	q->reading = 1;  in __videobuf_read_start()
998 static void __videobuf_read_stop(struct videobuf_queue *q)  in __videobuf_read_stop()  argument
1002 	videobuf_queue_cancel(q);  in __videobuf_read_stop()
1003 	__videobuf_free(q);  in __videobuf_read_stop()
1004 	INIT_LIST_HEAD(&q->stream);  in __videobuf_read_stop()
1006 		if (NULL == q->bufs[i])  in __videobuf_read_stop()
1008 		kfree(q->bufs[i]);  in __videobuf_read_stop()
1009 		q->bufs[i] = NULL;  in __videobuf_read_stop()
1011 	q->read_buf = NULL;  in __videobuf_read_stop()
1014 int videobuf_read_start(struct videobuf_queue *q)  in videobuf_read_start()  argument
1018 	videobuf_queue_lock(q);  in videobuf_read_start()
1019 	rc = __videobuf_read_start(q);  in videobuf_read_start()
1020 	videobuf_queue_unlock(q);  in videobuf_read_start()
1026 void videobuf_read_stop(struct videobuf_queue *q)  in videobuf_read_stop()  argument
1028 	videobuf_queue_lock(q);  in videobuf_read_stop()
1029 	__videobuf_read_stop(q);  in videobuf_read_stop()
1030 	videobuf_queue_unlock(q);  in videobuf_read_stop()
1034 void videobuf_stop(struct videobuf_queue *q)  in videobuf_stop()  argument
1036 	videobuf_queue_lock(q);  in videobuf_stop()
1038 	if (q->streaming)  in videobuf_stop()
1039 		__videobuf_streamoff(q);  in videobuf_stop()
1041 	if (q->reading)  in videobuf_stop()
1042 		__videobuf_read_stop(q);  in videobuf_stop()
1044 	videobuf_queue_unlock(q);  in videobuf_stop()
1048 ssize_t videobuf_read_stream(struct videobuf_queue *q,  in videobuf_read_stream()  argument
1055 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_read_stream()
1058 	videobuf_queue_lock(q);  in videobuf_read_stream()
1060 	if (q->streaming)  in videobuf_read_stream()
1062 	if (!q->reading) {  in videobuf_read_stream()
1063 		retval = __videobuf_read_start(q);  in videobuf_read_stream()
1071 		if (NULL == q->read_buf) {  in videobuf_read_stream()
1072 			q->read_buf = list_entry(q->stream.next,  in videobuf_read_stream()
1075 			list_del(&q->read_buf->stream);  in videobuf_read_stream()
1076 			q->read_off = 0;  in videobuf_read_stream()
1078 		rc = videobuf_waiton(q, q->read_buf, nonblocking, 1);  in videobuf_read_stream()
1085 		if (q->read_buf->state == VIDEOBUF_DONE) {  in videobuf_read_stream()
1086 			rc = __videobuf_copy_stream(q, q->read_buf, data + retval, count,  in videobuf_read_stream()
1094 			q->read_off += rc;  in videobuf_read_stream()
1097 			q->read_off = q->read_buf->size;  in videobuf_read_stream()
1103 		if (q->read_off == q->read_buf->size) {  in videobuf_read_stream()
1104 			list_add_tail(&q->read_buf->stream,  in videobuf_read_stream()
1105 				      &q->stream);  in videobuf_read_stream()
1106 			spin_lock_irqsave(q->irqlock, flags);  in videobuf_read_stream()
1107 			q->ops->buf_queue(q, q->read_buf);  in videobuf_read_stream()
1108 			spin_unlock_irqrestore(q->irqlock, flags);  in videobuf_read_stream()
1109 			q->read_buf = NULL;  in videobuf_read_stream()
1116 	videobuf_queue_unlock(q);  in videobuf_read_stream()
1122 				  struct videobuf_queue *q,  in videobuf_poll_stream()  argument
1129 	videobuf_queue_lock(q);  in videobuf_poll_stream()
1130 	if (q->streaming) {  in videobuf_poll_stream()
1131 		if (!list_empty(&q->stream))  in videobuf_poll_stream()
1132 			buf = list_entry(q->stream.next,  in videobuf_poll_stream()
1135 		if (!q->reading)  in videobuf_poll_stream()
1136 			__videobuf_read_start(q);  in videobuf_poll_stream()
1137 		if (!q->reading) {  in videobuf_poll_stream()
1139 		} else if (NULL == q->read_buf) {  in videobuf_poll_stream()
1140 			q->read_buf = list_entry(q->stream.next,  in videobuf_poll_stream()
1143 			list_del(&q->read_buf->stream);  in videobuf_poll_stream()
1144 			q->read_off = 0;  in videobuf_poll_stream()
1146 		buf = q->read_buf;  in videobuf_poll_stream()
1155 			switch (q->type) {  in videobuf_poll_stream()
1168 	videobuf_queue_unlock(q);  in videobuf_poll_stream()
1173 int videobuf_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma)  in videobuf_mmap_mapper()  argument
1178 	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);  in videobuf_mmap_mapper()
1185 	videobuf_queue_lock(q);  in videobuf_mmap_mapper()
1187 		struct videobuf_buffer *buf = q->bufs[i];  in videobuf_mmap_mapper()
1191 			rc = CALL(q, mmap_mapper, q, buf, vma);  in videobuf_mmap_mapper()
1195 	videobuf_queue_unlock(q);  in videobuf_mmap_mapper()