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Imported Upstream version 16.11.2
[deb_dpdk.git]
/
drivers
/
net
/
virtio
/
virtqueue.h
diff --git
a/drivers/net/virtio/virtqueue.h
b/drivers/net/virtio/virtqueue.h
index
b1070e0
..
569c251
100644
(file)
--- a/
drivers/net/virtio/virtqueue.h
+++ b/
drivers/net/virtio/virtqueue.h
@@
-71,8
+71,14
@@
struct rte_mbuf;
/**
* Return the physical address (or virtual address in case of
* virtio-user) of mbuf data buffer.
/**
* Return the physical address (or virtual address in case of
* virtio-user) of mbuf data buffer.
+ *
+ * The address is firstly casted to the word size (sizeof(uintptr_t))
+ * before casting it to uint64_t. This is to make it work with different
+ * combination of word size (64 bit and 32 bit) and virtio device
+ * (virtio-pci and virtio-user).
*/
*/
-#define VIRTIO_MBUF_ADDR(mb, vq) (*(uint64_t *)((uintptr_t)(mb) + (vq)->offset))
+#define VIRTIO_MBUF_ADDR(mb, vq) \
+ ((uint64_t)(*(uintptr_t *)((uintptr_t)(mb) + (vq)->offset)))
#else
#define VIRTIO_MBUF_ADDR(mb, vq) ((mb)->buf_physaddr)
#endif
#else
#define VIRTIO_MBUF_ADDR(mb, vq) ((mb)->buf_physaddr)
#endif