Documentation/networking/vxge.txt

   1 Neterion's (Formerly S2io) X3100 Series 10GbE PCIe Server Adapter Linux driver
   2 ==============================================================================
   3
   4 Contents
   5 --------
   6
   7 1) Introduction
   8 2) Features supported
   9 3) Configurable driver parameters
  10 4) Troubleshooting
  11
  12 1) Introduction:
  13 ----------------
  14 This Linux driver supports all Neterion's X3100 series 10 GbE PCIe I/O
  15 Virtualized Server adapters.
  16 The X3100 series supports four modes of operation, configurable via
  17 firmware -
  18         Single function mode
  19         Multi function mode
  20         SRIOV mode
  21         MRIOV mode
  22 The functions share a 10GbE link and the pci-e bus, but hardly anything else
  23 inside the ASIC. Features like independent hw reset, statistics, bandwidth/
  24 priority allocation and guarantees, GRO, TSO, interrupt moderation etc are
  25 supported independently on each function.
  26
  27 (See below for a complete list of features supported for both IPv4 and IPv6)
  28
  29 2) Features supported:
  30 ----------------------
  31
  32 i)   Single function mode (up to 17 queues)
  33
  34 ii)  Multi function mode (up to 17 functions)
  35
  36 iii) PCI-SIG's I/O Virtualization
  37        - Single Root mode: v1.0 (up to 17 functions)
  38        - Multi-Root mode: v1.0 (up to 17 functions)
  39
  40 iv)  Jumbo frames
  41        X3100 Series supports MTU up to 9600 bytes, modifiable using
  42        ip command.
  43
  44 v)   Offloads supported: (Enabled by default)
  45        Checksum offload (TCP/UDP/IP) on transmit and receive paths
  46        TCP Segmentation Offload (TSO) on transmit path
  47        Generic Receive Offload (GRO) on receive path
  48
  49 vi)  MSI-X: (Enabled by default)
  50        Resulting in noticeable performance improvement (up to 7% on certain
  51        platforms).
  52
  53 vii) NAPI: (Enabled by default)
  54        For better Rx interrupt moderation.
  55
  56 viii)RTH (Receive Traffic Hash): (Enabled by default)
  57        Receive side steering for better scaling.
  58
  59 ix)  Statistics
  60        Comprehensive MAC-level and software statistics displayed using
  61        "ethtool -S" option.
  62
  63 x)   Multiple hardware queues: (Enabled by default)
  64        Up to 17 hardware based transmit and receive data channels, with
  65        multiple steering options (transmit multiqueue enabled by default).
  66
  67 3) Configurable driver parameters:
  68 ----------------------------------
  69
  70 i)  max_config_dev
  71        Specifies maximum device functions to be enabled.
  72        Valid range: 1-8
  73
  74 ii) max_config_port
  75        Specifies number of ports to be enabled.
  76        Valid range: 1,2
  77        Default: 1
  78
  79 iii)max_config_vpath
  80        Specifies maximum VPATH(s) configured for each device function.
  81        Valid range: 1-17
  82
  83 iv) vlan_tag_strip
  84        Enables/disables vlan tag stripping from all received tagged frames that
  85        are not replicated at the internal L2 switch.
  86        Valid range: 0,1 (disabled, enabled respectively)
  87        Default: 1
  88
  89 v)  addr_learn_en
  90        Enable learning the mac address of the guest OS interface in
  91        virtualization environment.
  92        Valid range: 0,1 (disabled, enabled respectively)
  93        Default: 0