Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 36 insertions, 0 deletions

diff --git a/include/hw/cris/etraxfs_dma.h b/include/hw/cris/etraxfs_dma.h
new file mode 100644
index 000000000..095d76b95
--- /dev/null
+++ b/include/hw/cris/etraxfs_dma.h
@@ -0,0 +1,36 @@
+#ifndef HW_ETRAXFS_DMA_H
+#define HW_ETRAXFS_DMA_H
+
+#include "exec/hwaddr.h"
+
+struct dma_context_metadata {
+	/* data descriptor md */
+	uint16_t metadata;
+};
+
+struct etraxfs_dma_client
+{
+	/* DMA controller. */
+	int channel;
+	void *ctrl;
+
+	/* client.  */
+	struct {
+		int (*push)(void *opaque, unsigned char *buf,
+		            int len, bool eop);
+		void (*pull)(void *opaque);
+		void (*metadata_push)(void *opaque,
+		                      const struct dma_context_metadata *md);
+		void *opaque;
+	} client;
+};
+
+void *etraxfs_dmac_init(hwaddr base, int nr_channels);
+void etraxfs_dmac_connect(void *opaque, int channel, qemu_irq *line,
+			  int input);
+void etraxfs_dmac_connect_client(void *opaque, int c, 
+				 struct etraxfs_dma_client *cl);
+int etraxfs_dmac_input(struct etraxfs_dma_client *client, 
+		       void *buf, int len, int eop);
+
+#endif