> -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Ouyang Changchun > Sent: Monday, March 2, 2015 8:41 AM > To: dev at dpdk.org > Subject: [dpdk-dev] [PATCH v2] doc: Update prog guide for virtio > > This patch add contents for major change in single virtio implementation, also > add back something for merge-able feature and promiscuous mode in virtio. > > Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com> > --- > > Changes in v2 > -- A few words adjusted. > > .../prog_guide/poll_mode_drv_emulated_virtio_nic.rst | 17 > +++++++++++++---- > 1 file changed, 13 insertions(+), 4 deletions(-) > > diff --git a/doc/guides/prog_guide/poll_mode_drv_emulated_virtio_nic.rst > b/doc/guides/prog_guide/poll_mode_drv_emulated_virtio_nic.rst > index b0a6250..aae32b6 100644 > --- a/doc/guides/prog_guide/poll_mode_drv_emulated_virtio_nic.rst > +++ b/doc/guides/prog_guide/poll_mode_drv_emulated_virtio_nic.rst > @@ -68,20 +68,29 @@ Features and Limitations of virtio PMD > > In this release, the virtio PMD driver provides the basic functionality of > packet reception and transmission. > > -* This release does not support mergeable buffers per packet for > performance reasons. > - The packet size supported is from 64 to 1518. > - rte_mbuf should be big enough to hold the whole packet. > +* It supports merge-able buffers per packet when receiving packets and > scattered buffer per packet > + when transmitting packets. The packet size supported is from 64 to 1518. > + > +* It supports multicast packets and promiscuous mode. > > * The descriptor number for the RX/TX queue is hard-coded to be 256 by > qemu. > If given a different descriptor number by the upper application, > the virtio PMD generates a warning and fall back to the hard-coded value. > > -* Features such as mac/vlan filter are not supported. > +* Features of mac/vlan filter are supported, negotiation with > vhost/backend are needed to support them. > + When backend can't support vlan filter, virtio app on guest should > disable > vlan filter to make sure > + the virtio port is configured correctly. E.g. specify > '--disable-hw-vlan' in > testpmd command line. > > * RTE_PKTMBUF_HEADROOM should be defined larger than sizeof(struct > virtio_net_hdr), which is 10 bytes. > > * Virtio does not support runtime configuration. > > +* Virtio supports Link State interrupt. > + > +* Virtio supports software vlan stripping and inserting. > + > +* Virtio supports using port IO to get PCI resource when uio/igb_uio > module is not available. > + > Prerequisites > ------------- > > -- > 1.8.4.2
Acked-by: Siobhan Butler <siobhan.a.butler at intel.com>
