virtio.h: add apis virtio_read/write_config_member

Used to read/write the virtio deivces' configuration space member Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
OpenAMP · Oct 12, 2024 · 60c1fc3 · 60c1fc3
1 parent ab7922c
commit 60c1fc3
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/lib/include/openamp/virtio.h b/lib/include/openamp/virtio.h
@@ -138,6 +138,20 @@ struct virtio_device_id {
 #define VIRTIO_TRANSPORT_F_START      28
 #define VIRTIO_TRANSPORT_F_END        32
 
+/*
+ * Read the virtio device configuration member.
+ */
+#define virtio_read_config_member(vdev, structname, member, ptr) \
+	virtio_read_config(vdev, metal_offset_of(structname, member), \
+			   ptr, sizeof(((structname *)0)->member))
+
+/*
+ * Write the virtio device configuration member.
+ */
+#define virtio_write_config_member(vdev, structname, member, ptr) \
+	virtio_write_config(vdev, metal_offset_of(structname, member), \
+			    ptr, sizeof(((structname *)0)->member))
+
 #ifdef VIRTIO_DEBUG
 #include <metal/log.h>