25 int ivtv_buf_copy_from_user(struct ivtv_stream *s, struct ivtv_buffer *buf, const char __user *src,…  in ivtv_buf_copy_from_user()  argument
27 	if (s->buf_size - buf->bytesused < copybytes)  in ivtv_buf_copy_from_user()
28 		copybytes = s->buf_size - buf->bytesused;  in ivtv_buf_copy_from_user()
29 	if (copy_from_user(buf->buf + buf->bytesused, src, copybytes)) {  in ivtv_buf_copy_from_user()
32 	buf->bytesused += copybytes;  in ivtv_buf_copy_from_user()
36 void ivtv_buf_swap(struct ivtv_buffer *buf)  in ivtv_buf_swap()  argument
40 	for (i = 0; i < buf->bytesused; i += 4)  in ivtv_buf_swap()
41 		swab32s((u32 *)(buf->buf + i));  in ivtv_buf_swap()
52 void ivtv_enqueue(struct ivtv_stream *s, struct ivtv_buffer *buf, struct ivtv_queue *q)  in ivtv_enqueue()  argument
58 		buf->bytesused = 0;  in ivtv_enqueue()
59 		buf->readpos = 0;  in ivtv_enqueue()
60 		buf->b_flags = 0;  in ivtv_enqueue()
61 		buf->dma_xfer_cnt = 0;  in ivtv_enqueue()
64 	list_add_tail(&buf->list, &q->list);  in ivtv_enqueue()
67 	q->bytesused += buf->bytesused - buf->readpos;  in ivtv_enqueue()
73 	struct ivtv_buffer *buf = NULL;  in ivtv_dequeue()  local
78 		buf = list_entry(q->list.next, struct ivtv_buffer, list);  in ivtv_dequeue()
82 		q->bytesused -= buf->bytesused - buf->readpos;  in ivtv_dequeue()
85 	return buf;  in ivtv_dequeue()
91 	struct ivtv_buffer *buf = list_entry(from->list.next, struct ivtv_buffer, list);  in ivtv_queue_move_buf()  local
96 	from->bytesused -= buf->bytesused - buf->readpos;  in ivtv_queue_move_buf()
99 		buf->bytesused = buf->readpos = buf->b_flags = buf->dma_xfer_cnt = 0;  in ivtv_queue_move_buf()
102 	to->bytesused += buf->bytesused - buf->readpos;  in ivtv_queue_move_buf()
145 		struct ivtv_buffer *buf = list_entry(steal->list.prev, struct ivtv_buffer, list);  in ivtv_queue_move()  local
146 		u16 dma_xfer_cnt = buf->dma_xfer_cnt;  in ivtv_queue_move()
152 		while (dma_xfer_cnt == buf->dma_xfer_cnt) {  in ivtv_queue_move()
157 			steal->bytesused -= buf->bytesused - buf->readpos;  in ivtv_queue_move()
158 			buf->bytesused = buf->readpos = buf->b_flags = buf->dma_xfer_cnt = 0;  in ivtv_queue_move()
164 			buf = list_entry(steal->list.prev, struct ivtv_buffer, list);  in ivtv_queue_move()
240 		struct ivtv_buffer *buf = kzalloc(sizeof(struct ivtv_buffer),  in ivtv_stream_alloc()  local
243 		if (buf == NULL)  in ivtv_stream_alloc()
245 		buf->buf = kmalloc(s->buf_size + 256, GFP_KERNEL|__GFP_NOWARN);  in ivtv_stream_alloc()
246 		if (buf->buf == NULL) {  in ivtv_stream_alloc()
247 			kfree(buf);  in ivtv_stream_alloc()
250 		INIT_LIST_HEAD(&buf->list);  in ivtv_stream_alloc()
252 			buf->dma_handle = pci_map_single(s->itv->pdev,  in ivtv_stream_alloc()
253 				buf->buf, s->buf_size + 256, s->dma);  in ivtv_stream_alloc()
254 			ivtv_buf_sync_for_cpu(s, buf);  in ivtv_stream_alloc()
256 		ivtv_enqueue(s, buf, &s->q_free);  in ivtv_stream_alloc()
267 	struct ivtv_buffer *buf;  in ivtv_stream_free()  local
273 	while ((buf = ivtv_dequeue(s, &s->q_free))) {  in ivtv_stream_free()
275 			pci_unmap_single(s->itv->pdev, buf->dma_handle,  in ivtv_stream_free()
277 		kfree(buf->buf);  in ivtv_stream_free()
278 		kfree(buf);  in ivtv_stream_free()