ceph/src/spdk/dpdk/doc/guides/vdpadevs/features_overview.rst

   1 ..  SPDX-License-Identifier: BSD-3-Clause
   2     Copyright 2019 Mellanox Technologies, Ltd
   3
   4 Overview of vDPA Drivers Features
   5 =================================
   6
   7 This section explains the supported features that are listed in the table below.
   8
   9 csum
  10   Device can handle packets with partial checksum.
  11
  12 guest csum
  13   Guest can handle packets with partial checksum.
  14
  15 mac
  16   Device has given MAC address.
  17
  18 gso
  19   Device can handle packets with any GSO type.
  20
  21 guest tso4
  22   Guest can receive TSOv4.
  23
  24 guest tso6
  25   Guest can receive TSOv6.
  26
  27 ecn
  28   Device can receive TSO with ECN.
  29
  30 ufo
  31   Device can receive UFO.
  32
  33 host tso4
  34   Device can receive TSOv4.
  35
  36 host tso6
  37   Device can receive TSOv6.
  38
  39 mrg rxbuf
  40   Guest can merge receive buffers.
  41
  42 ctrl vq
  43   Control channel is available.
  44
  45 ctrl rx
  46   Control channel RX mode support.
  47
  48 any layout
  49   Device can handle any descriptor layout.
  50
  51 guest announce
  52   Guest can send gratuitous packets.
  53
  54 mq
  55   Device supports Receive Flow Steering.
  56
  57 version 1
  58   v1.0 compliant.
  59
  60 log all
  61   Device can log all write descriptors (live migration).
  62
  63 indirect desc
  64   Indirect buffer descriptors support.
  65
  66 event idx
  67   Support for avail_idx and used_idx fields.
  68
  69 mtu
  70   Host can advise the guest with its maximum supported MTU.
  71
  72 in_order
  73   Device can use descriptors in ring order.
  74
  75 IOMMU platform
  76   Device support IOMMU addresses.
  77
  78 packed
  79   Device support packed virtio queues.
  80
  81 proto mq
  82   Support the number of queues query.
  83
  84 proto log shmfd
  85   Guest support setting log base.
  86
  87 proto rarp
  88   Host can broadcast a fake RARP after live migration.
  89
  90 proto reply ack
  91   Host support requested operation status ack.
  92
  93 proto host notifier
  94   Host can register memory region based host notifiers.
  95
  96 proto pagefault
  97   Slave expose page-fault FD for migration process.
  98
  99 BSD nic_uio
 100   BSD ``nic_uio`` module supported.
 101
 102 Linux VFIO
 103   Works with ``vfio-pci`` kernel module.
 104
 105 Other kdrv
 106   Kernel module other than above ones supported.
 107
 108 ARMv7
 109   Support armv7 architecture.
 110
 111 ARMv8
 112   Support armv8a (64bit) architecture.
 113
 114 Power8
 115   Support PowerPC architecture.
 116
 117 x86-32
 118   Support 32bits x86 architecture.
 119
 120 x86-64
 121   Support 64bits x86 architecture.
 122
 123 Usage doc
 124   Documentation describes usage, In ``doc/guides/vdpadevs/``.
 125
 126 Design doc
 127   Documentation describes design. In ``doc/guides/vdpadevs/``.
 128
 129 Perf doc
 130   Documentation describes performance values, In ``doc/perf/``.
 131
 132 .. note::
 133
 134    Most of the features capabilities should be provided by the drivers via the
 135    next vDPA operations: ``get_features`` and ``get_protocol_features``.
 136
 137
 138 References
 139 ==========
 140
 141   * `OASIS: Virtual I/O Device (VIRTIO) Version 1.1 <https://docs.oasis-open.org/virtio/virtio/v1.1/csprd01/virtio-v1.1-csprd01.html>`_
 142   * `QEMU: Vhost-user Protocol <https://qemu.weilnetz.de/doc/interop/vhost-user.html>`_
 143
 144
 145 Features Table
 146 ==============
 147
 148 .. _table_vdpa_pmd_features:
 149
 150 .. include:: overview_feature_table.txt
 151
 152 .. Note::
 153
 154    Features marked with "P" are partially supported. Refer to the appropriate
 155    driver guide in the following sections for details.