summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/cx18/cx18-queue.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/cx18/cx18-queue.h')
-rw-r--r--drivers/media/video/cx18/cx18-queue.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-queue.h b/drivers/media/video/cx18/cx18-queue.h
new file mode 100644
index 0000000..f86c8a6
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-queue.h
@@ -0,0 +1,59 @@
+/*
+ * cx18 buffer queues
+ *
+ * Derived from ivtv-queue.h
+ *
+ * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307 USA
+ */
+
+#define CX18_DMA_UNMAPPED ((u32) -1)
+
+/* cx18_buffer utility functions */
+
+static inline void cx18_buf_sync_for_cpu(struct cx18_stream *s,
+ struct cx18_buffer *buf)
+{
+ pci_dma_sync_single_for_cpu(s->cx->dev, buf->dma_handle,
+ s->buf_size, s->dma);
+}
+
+static inline void cx18_buf_sync_for_device(struct cx18_stream *s,
+ struct cx18_buffer *buf)
+{
+ pci_dma_sync_single_for_device(s->cx->dev, buf->dma_handle,
+ s->buf_size, s->dma);
+}
+
+int cx18_buf_copy_from_user(struct cx18_stream *s, struct cx18_buffer *buf,
+ const char __user *src, int copybytes);
+void cx18_buf_swap(struct cx18_buffer *buf);
+
+/* cx18_queue utility functions */
+void cx18_queue_init(struct cx18_queue *q);
+void cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf,
+ struct cx18_queue *q);
+struct cx18_buffer *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q);
+int cx18_queue_move(struct cx18_stream *s, struct cx18_queue *from,
+ struct cx18_queue *steal, struct cx18_queue *to, int needed_bytes);
+struct cx18_buffer *cx18_queue_find_buf(struct cx18_stream *s, u32 id,
+ u32 bytesused);
+void cx18_flush_queues(struct cx18_stream *s);
+
+/* cx18_stream utility functions */
+int cx18_stream_alloc(struct cx18_stream *s);
+void cx18_stream_free(struct cx18_stream *s);
OpenPOWER on IntegriCloud