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| author | Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> | 2016-02-01 11:17:58 +0530 |
|---|---|---|
| committer | Alexey Kardashevskiy <aik@ozlabs.ru> | 2016-02-08 16:40:38 +1100 |
| commit | fdb62149dc88c8003f1c2273f6becca08629910a (patch) | |
| tree | 6c1ae5e12ac0d35dd13ac2b532512707b59ed36c /lib/libvirtio/virtio.c | |
| parent | b5a692d3f7c2cf3ca2eea5e9f8f99f0972cf56d1 (diff) | |
| download | SLOF-fdb62149dc88c8003f1c2273f6becca08629910a.zip SLOF-fdb62149dc88c8003f1c2273f6becca08629910a.tar.gz SLOF-fdb62149dc88c8003f1c2273f6becca08629910a.tar.bz2 | |
virtio-blk: add helpers for filling descriptors
Enable virtio_fill_desc/fill_blk_hdr with legacy and modern mode for
further use
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Diffstat (limited to 'lib/libvirtio/virtio.c')
| -rw-r--r-- | lib/libvirtio/virtio.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/libvirtio/virtio.c b/lib/libvirtio/virtio.c index 063a621..4ea8278 100644 --- a/lib/libvirtio/virtio.c +++ b/lib/libvirtio/virtio.c @@ -113,6 +113,25 @@ struct vring_used *virtio_get_vring_used(struct virtio_device *dev, int queue) * sizeof(struct vring_avail)); } +/** + * Fill the virtio ring descriptor depending on the legacy mode or virtio 1.0 + */ +void virtio_fill_desc(struct vring_desc *desc, bool is_modern, + uint64_t addr, uint32_t len, + uint16_t flags, uint16_t next) +{ + if (is_modern) { + desc->addr = cpu_to_le64(addr); + desc->len = cpu_to_le32(len); + desc->flags = cpu_to_le16(flags); + desc->next = cpu_to_le16(next); + } else { + desc->addr = addr; + desc->len = len; + desc->flags = flags; + desc->next = next; + } +} /** * Reset virtio device |