net/virtio-user: move vhost-user specific code

[dpdk.git] / drivers / net / virtio / virtio_user / vhost_user.c

diff --git a/drivers/net/virtio/virtio_user/vhost_user.c b/drivers/net/virtio/virtio_user/vhost_user.c
index 082e821..295ce16 100644 (file)
--- a/drivers/net/virtio/virtio_user/vhost_user.c
+++ b/drivers/net/virtio/virtio_user/vhost_user.c
@@ -42,6 +42,38 @@
 
 #include "vhost.h"
 
+/* The version of the protocol we support */
+#define VHOST_USER_VERSION    0x1
+
+#define VHOST_MEMORY_MAX_NREGIONS 8
+struct vhost_memory {
+       uint32_t nregions;
+       uint32_t padding;
+       struct vhost_memory_region regions[VHOST_MEMORY_MAX_NREGIONS];
+};
+
+struct vhost_user_msg {
+       enum vhost_user_request request;
+
+#define VHOST_USER_VERSION_MASK     0x3
+#define VHOST_USER_REPLY_MASK       (0x1 << 2)
+       uint32_t flags;
+       uint32_t size; /* the following payload size */
+       union {
+#define VHOST_USER_VRING_IDX_MASK   0xff
+#define VHOST_USER_VRING_NOFD_MASK  (0x1 << 8)
+               uint64_t u64;
+               struct vhost_vring_state state;
+               struct vhost_vring_addr addr;
+               struct vhost_memory memory;
+       } payload;
+       int fds[VHOST_MEMORY_MAX_NREGIONS];
+} __attribute((packed));
+
+#define VHOST_USER_HDR_SIZE offsetof(struct vhost_user_msg, payload.u64)
+#define VHOST_USER_PAYLOAD_SIZE \
+       (sizeof(struct vhost_user_msg) - VHOST_USER_HDR_SIZE)
+
 static int
 vhost_user_write(int fd, void *buf, int len, int *fds, int fd_num)
 {