examples/vhost: zero copy mode

[dpdk.git] / examples / vhost / virtio-net.h

diff --git a/examples/vhost/virtio-net.h b/examples/vhost/virtio-net.h
index 3e677e7..fbc2a16 100644 (file)
--- a/examples/vhost/virtio-net.h
+++ b/examples/vhost/virtio-net.h
@@ -40,6 +40,7 @@
 /* Backend value set by guest. */
 #define VIRTIO_DEV_STOPPED -1
 
+#define PAGE_SIZE   4096
 
 /* Enum for virtqueue management. */
 enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
@@ -99,6 +100,21 @@ struct virtio_memory_regions {
        uint64_t        address_offset;                 /* Offset of region for address translation. */
 };
 
+/*
+ * Information relating to memory regions including offsets to
+ * addresses in host physical space.
+ */
+struct virtio_memory_regions_hpa {
+       /* Base guest physical address of region. */
+       uint64_t        guest_phys_address;
+       /* End guest physical address of region. */
+       uint64_t        guest_phys_address_end;
+       /* Size of region. */
+       uint64_t        memory_size;
+       /* Offset of region for gpa to hpa translation. */
+       uint64_t        host_phys_addr_offset;
+};
+
 /*
  * Memory structure includes region and mapping information.
  */
@@ -107,7 +123,12 @@ struct virtio_memory {
        uint64_t                        mapped_address;                 /* Mapped address of memory file base in our applications memory space. */
        uint64_t                        mapped_size;                    /* Total size of memory file. */
        uint32_t                        nregions;                               /* Number of memory regions. */
-       struct virtio_memory_regions    regions[0];     /* Memory region information. */
+        /* Number of memory regions for gpa to hpa translation. */
+       uint32_t                        nregions_hpa;
+       /* Memory region information for gpa to hpa translation. */
+       struct virtio_memory_regions_hpa  *regions_hpa;
+       /* Memory region information. */
+       struct virtio_memory_regions      regions[0];
 };
 
 /*