1cb4415751
The vDPA device offloads all the datapath of the vhost device to the HW device. In order to expose to the user traffic information this patch introduces new 3 APIs to get traffic statistics, the device statistics name and to reset the statistics per virtio queue. The statistics are taken directly from the vDPA driver managing the HW device and can be different for each vendor driver. Signed-off-by: Matan Azrad <matan@mellanox.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
159 lines
3.0 KiB
ReStructuredText
159 lines
3.0 KiB
ReStructuredText
.. SPDX-License-Identifier: BSD-3-Clause
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Copyright 2019 Mellanox Technologies, Ltd
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Overview of vDPA Drivers Features
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=================================
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This section explains the supported features that are listed in the table below.
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csum
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Device can handle packets with partial checksum.
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guest csum
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Guest can handle packets with partial checksum.
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mac
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Device has given MAC address.
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gso
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Device can handle packets with any GSO type.
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guest tso4
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Guest can receive TSOv4.
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guest tso6
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Guest can receive TSOv6.
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ecn
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Device can receive TSO with ECN.
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ufo
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Device can receive UFO.
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host tso4
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Device can receive TSOv4.
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host tso6
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Device can receive TSOv6.
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mrg rxbuf
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Guest can merge receive buffers.
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ctrl vq
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Control channel is available.
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ctrl rx
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Control channel RX mode support.
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any layout
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Device can handle any descriptor layout.
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guest announce
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Guest can send gratuitous packets.
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mq
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Device supports Receive Flow Steering.
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version 1
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v1.0 compliant.
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log all
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Device can log all write descriptors (live migration).
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indirect desc
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Indirect buffer descriptors support.
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event idx
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Support for avail_idx and used_idx fields.
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mtu
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Host can advise the guest with its maximum supported MTU.
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in_order
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Device can use descriptors in ring order.
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IOMMU platform
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Device support IOMMU addresses.
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packed
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Device support packed virtio queues.
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proto mq
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Support the number of queues query.
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proto log shmfd
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Guest support setting log base.
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proto rarp
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Host can broadcast a fake RARP after live migration.
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proto reply ack
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Host support requested operation status ack.
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proto host notifier
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Host can register memory region based host notifiers.
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proto pagefault
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Slave expose page-fault FD for migration process.
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queue statistics
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Support virtio queue statistics query.
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BSD nic_uio
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BSD ``nic_uio`` module supported.
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Linux VFIO
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Works with ``vfio-pci`` kernel module.
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Other kdrv
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Kernel module other than above ones supported.
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ARMv7
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Support armv7 architecture.
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ARMv8
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Support armv8a (64bit) architecture.
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Power8
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Support PowerPC architecture.
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x86-32
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Support 32bits x86 architecture.
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x86-64
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Support 64bits x86 architecture.
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Usage doc
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Documentation describes usage, In ``doc/guides/vdpadevs/``.
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Design doc
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Documentation describes design. In ``doc/guides/vdpadevs/``.
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Perf doc
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Documentation describes performance values, In ``doc/perf/``.
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.. note::
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Most of the features capabilities should be provided by the drivers via the
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next vDPA operations: ``get_features`` and ``get_protocol_features``.
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References
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==========
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* `OASIS: Virtual I/O Device (VIRTIO) Version 1.1 <https://docs.oasis-open.org/virtio/virtio/v1.1/csprd01/virtio-v1.1-csprd01.html>`_
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* `QEMU: Vhost-user Protocol <https://qemu.weilnetz.de/doc/interop/vhost-user.html>`_
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Features Table
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==============
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.. _table_vdpa_pmd_features:
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.. include:: overview_feature_table.txt
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.. Note::
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Features marked with "P" are partially supported. Refer to the appropriate
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driver guide in the following sections for details.
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