qemu:virtio-net: Add a virtqueue for control commands from the guest (Alex Williamson)

[qemu] / hw / virtio-net.h

diff --git a/hw/virtio-net.h b/hw/virtio-net.h
index 9dce663..119e38d 100644 (file)
--- a/hw/virtio-net.h
+++ b/hw/virtio-net.h
@@ -40,6 +40,7 @@
 #define VIRTIO_NET_F_HOST_UFO   14      /* Host can handle UFO in. */
 #define VIRTIO_NET_F_MRG_RXBUF  15      /* Host can merge receive buffers. */
 #define VIRTIO_NET_F_STATUS     16      /* virtio_net_config.status available */
+#define VIRTIO_NET_F_CTRL_VQ    17      /* Control channel available */
 
 #define VIRTIO_NET_S_LINK_UP    1       /* Link is up */
 
@@ -84,4 +85,21 @@ struct virtio_net_hdr_mrg_rxbuf
 
 void virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn);
 
+/*
+ * Control virtqueue data structures
+ *
+ * The control virtqueue expects a header in the first sg entry
+ * and an ack/status response in the last entry.  Data for the
+ * command goes in between.
+ */
+struct virtio_net_ctrl_hdr {
+    uint8_t class;
+    uint8_t cmd;
+};
+
+typedef uint8_t virtio_net_ctrl_ack;
+
+#define VIRTIO_NET_OK     0
+#define VIRTIO_NET_ERR    1
+
 #endif