From: Jeffrey Kardatzke <jkardatzke@xxxxxxxxxx>
Adds a V4L2 flag which indicates that a queue is using restricted
dmabufs and the corresponding capability flag.
Signed-off-by: Jeffrey Kardatzke <jkardatzke@xxxxxxxxxx>
Signed-off-by: Yunfei Dong <yunfei.dong@xxxxxxxxxxxx>
---
include/media/videobuf2-core.h | 8 +++++++-
include/uapi/linux/videodev2.h | 2 ++
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 955237ac503d..afd497e93a37 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -517,6 +517,9 @@ struct vb2_buf_ops {
* ->finish().
* @non_coherent_mem: when set queue will attempt to allocate buffers using
* non-coherent memory.
+ * @allow_restricted_mem: when set user-space can pass the %V4L2_MEMORY_FLAG_RESTRICTED
+ * flag to indicate the dma bufs are restricted.
+ * @restricted_mem: when set queue will verify that the dma bufs are restricted.
* @lock: pointer to a mutex that protects the &struct vb2_queue. The
* driver can set this to a mutex to let the v4l2 core serialize
* the queuing ioctls. If the driver wants to handle locking
@@ -621,6 +624,8 @@ struct vb2_queue {
unsigned int uses_requests:1;
unsigned int allow_cache_hints:1;
unsigned int non_coherent_mem:1;
+ unsigned int allow_restricted_mem:1;
+ unsigned int restricted_mem:1;
struct mutex *lock;
void *owner;
@@ -792,7 +797,8 @@ void vb2_core_querybuf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb);
* @q: pointer to &struct vb2_queue with videobuf2 queue.
* @memory: memory type, as defined by &enum vb2_memory.
* @flags: auxiliary queue/buffer management flags. Currently, the only
- * used flag is %V4L2_MEMORY_FLAG_NON_COHERENT.
+ * used flags are %V4L2_MEMORY_FLAG_NON_COHERENT and
+ * %V4L2_MEMORY_FLAG_RESTRICTED.
* @count: requested buffer count.
*
* Videobuf2 core helper to implement VIDIOC_REQBUF() operation. It is called
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 2663213b76a4..b6fbbd276bf1 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1026,6 +1026,7 @@ struct v4l2_requestbuffers {
};
#define V4L2_MEMORY_FLAG_NON_COHERENT (1 << 0)
+#define V4L2_MEMORY_FLAG_RESTRICTED (1 << 1)
/* capabilities for struct v4l2_requestbuffers and v4l2_create_buffers */
#define V4L2_BUF_CAP_SUPPORTS_MMAP (1 << 0)
@@ -1037,6 +1038,7 @@ struct v4l2_requestbuffers {
#define V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS (1 << 6)
#define V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS (1 << 7)
#define V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS (1 << 8)
+#define V4L2_BUF_CAP_SUPPORTS_RESTRICTED_MEM (1 << 9)
/**
* struct v4l2_plane - plane info for multi-planar buffers
--
2.18.0
