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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2007-10-13 03:27:47 +0200
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2007-10-13 03:27:47 +0200
commitb981d8b3f5e008ff10d993be633ad00564fc22cd (patch)
treee292dc07b22308912cf6a58354a608b9e5e8e1fd /include/media/videobuf-vmalloc.h
parentInput: add support for SEGA Dreamcast keyboard (diff)
parentOnly enable BLOCK_COMPAT if COMPAT is needed (diff)
downloadlinux-b981d8b3f5e008ff10d993be633ad00564fc22cd.tar.xz
linux-b981d8b3f5e008ff10d993be633ad00564fc22cd.zip
Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: drivers/macintosh/adbhid.c
Diffstat (limited to 'include/media/videobuf-vmalloc.h')
-rw-r--r--include/media/videobuf-vmalloc.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/include/media/videobuf-vmalloc.h b/include/media/videobuf-vmalloc.h
new file mode 100644
index 000000000000..26a8958d23d1
--- /dev/null
+++ b/include/media/videobuf-vmalloc.h
@@ -0,0 +1,41 @@
+/*
+ * helper functions for vmalloc capture buffers
+ *
+ * The functions expect the hardware being able to scatter gatter
+ * (i.e. the buffers are not linear in physical memory, but fragmented
+ * into PAGE_SIZE chunks). They also assume the driver does not need
+ * to touch the video data.
+ *
+ * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
+ *
+ * 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
+ */
+
+#include <media/videobuf-core.h>
+
+/* --------------------------------------------------------------------- */
+
+struct videbuf_vmalloc_memory
+{
+ u32 magic;
+
+ void *vmalloc;
+
+ /* remap_vmalloc_range seems to need to run after mmap() on some cases */
+ struct vm_area_struct *vma;
+};
+
+void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
+ struct videobuf_queue_ops *ops,
+ void *dev,
+ spinlock_t *irqlock,
+ enum v4l2_buf_type type,
+ enum v4l2_field field,
+ unsigned int msize,
+ void *priv);
+
+void *videobuf_to_vmalloc (struct videobuf_buffer *buf);
+
+void videobuf_vmalloc_free (struct videobuf_buffer *buf);