new file mode 100644
@@ -0,0 +1,30 @@
+
+#ifndef _LINUX_VIRTIO_RPMSG_H
+#define _LINUX_VIRTIO_RPMSG_H
+
+/* Offset in struct fw_rsc_vdev */
+#define RPMSG_CONFIG_OFFSET 0
+
+/**
+ * struct virtio_rpmsg_cfg - optional configuration field for virtio rpmsg
+ * provided at probe time by virtio (get/set)
+ * @id: virtio cfg id (as in virtio_ids.h)
+ * @version: virtio_rpmsg_cfg structure version number
+ * @da: device address
+ * @pa: physical address
+ * @len: length (in bytes)
+ * @buf_size: size of rpmsg buffer size (defined by firmware else default value
+ * used)
+ * @reserved: reserved (must be zero)
+ */
+struct virtio_rpmsg_cfg {
+ u32 id;
+ u32 version;
+ u32 da;
+ u32 pa;
+ u32 len;
+ u32 buf_size;
+ u32 reserved;
+} __packed;
+
+#endif
Rpmsg channel configuration should be identical on host and coprocessor side. This patch proposes a new structure named struct virtio_rpmsg_cfg to gather all configuration information to characterize the communication link and. This structure will be exchanged with coprocessor via the resource table, expanding struct fw_rsc_vdev. It will guarantee that host and coprocessor will share the same information. virtio_rpmsg will access it thanks to virtio get and set features. Presence of struct virtio_rpmsg_cfg is optional. Signed-off-by: Loic Pallardy <loic.pallardy@st.com> --- Changes since V3: - remove va field from struct virtio_rpmsg_cfg --- include/linux/rpmsg/virtio_rpmsg.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 include/linux/rpmsg/virtio_rpmsg.h -- 1.9.1