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| author |   Christian Ehrhardt <christian.ehrhardt@canonical.com> | 2017-06-08 09:46:51 -0600 |
|---|---|---|
| committer | Christian Ehrhardt <christian.ehrhardt@canonical.com> | 2017-06-08 09:51:02 -0600 |
| commit | aab0c291a90f701b60f8c9a88cbcc265cba0ec8b (patch) | |
| tree | bfa7bf9663cb9a518d81f18e3a2c792eee8fa1c8 /drivers/net/virtio/virtqueue.h | |
| parent | ce3d555e43e3795b5d9507fcfc76b7a0a92fd0d6 (diff) | |
Imported Upstream version 16.11.2
Change-Id: I947038e46a2c747296dc7aa7522239733ca2f659
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Diffstat (limited to 'drivers/net/virtio/virtqueue.h')
| -rw-r--r-- | drivers/net/virtio/virtqueue.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h index b1070e05..569c251c 100644 --- 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. + * + * 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 |