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diff --git a/Documentation/networking/device_drivers/neterion/s2io.txt b/Documentation/networking/device_drivers/neterion/s2io.txt deleted file mode 100644 index 0362a42f7cf4..000000000000 --- a/Documentation/networking/device_drivers/neterion/s2io.txt +++ /dev/null @@ -1,141 +0,0 @@ -Release notes for Neterion's (Formerly S2io) Xframe I/II PCI-X 10GbE driver. - -Contents -======= -- 1. Introduction -- 2. Identifying the adapter/interface -- 3. Features supported -- 4. Command line parameters -- 5. Performance suggestions -- 6. Available Downloads - - -1. Introduction: -This Linux driver supports Neterion's Xframe I PCI-X 1.0 and -Xframe II PCI-X 2.0 adapters. It supports several features -such as jumbo frames, MSI/MSI-X, checksum offloads, TSO, UFO and so on. -See below for complete list of features. -All features are supported for both IPv4 and IPv6. - -2. Identifying the adapter/interface: -a. Insert the adapter(s) in your system. -b. Build and load driver -# insmod s2io.ko -c. View log messages -# dmesg | tail -40 -You will see messages similar to: -eth3: Neterion Xframe I 10GbE adapter (rev 3), Version 2.0.9.1, Intr type INTA -eth4: Neterion Xframe II 10GbE adapter (rev 2), Version 2.0.9.1, Intr type INTA -eth4: Device is on 64 bit 133MHz PCIX(M1) bus - -The above messages identify the adapter type(Xframe I/II), adapter revision, -driver version, interface name(eth3, eth4), Interrupt type(INTA, MSI, MSI-X). -In case of Xframe II, the PCI/PCI-X bus width and frequency are displayed -as well. - -To associate an interface with a physical adapter use "ethtool -p <ethX>". -The corresponding adapter's LED will blink multiple times. - -3. Features supported: -a. Jumbo frames. Xframe I/II supports MTU up to 9600 bytes, -modifiable using ip command. - -b. Offloads. Supports checksum offload(TCP/UDP/IP) on transmit -and receive, TSO. - -c. Multi-buffer receive mode. Scattering of packet across multiple -buffers. Currently driver supports 2-buffer mode which yields -significant performance improvement on certain platforms(SGI Altix, -IBM xSeries). - -d. MSI/MSI-X. Can be enabled on platforms which support this feature -(IA64, Xeon) resulting in noticeable performance improvement(up to 7% -on certain platforms). - -e. Statistics. Comprehensive MAC-level and software statistics displayed -using "ethtool -S" option. - -f. Multi-FIFO/Ring. Supports up to 8 transmit queues and receive rings, -with multiple steering options. - -4. Command line parameters -a. tx_fifo_num -Number of transmit queues -Valid range: 1-8 -Default: 1 - -b. rx_ring_num -Number of receive rings -Valid range: 1-8 -Default: 1 - -c. tx_fifo_len -Size of each transmit queue -Valid range: Total length of all queues should not exceed 8192 -Default: 4096 - -d. rx_ring_sz -Size of each receive ring(in 4K blocks) -Valid range: Limited by memory on system -Default: 30 - -e. intr_type -Specifies interrupt type. Possible values 0(INTA), 2(MSI-X) -Valid values: 0, 2 -Default: 2 - -5. Performance suggestions -General: -a. Set MTU to maximum(9000 for switch setup, 9600 in back-to-back configuration) -b. Set TCP windows size to optimal value. -For instance, for MTU=1500 a value of 210K has been observed to result in -good performance. -# sysctl -w net.ipv4.tcp_rmem="210000 210000 210000" -# sysctl -w net.ipv4.tcp_wmem="210000 210000 210000" -For MTU=9000, TCP window size of 10 MB is recommended. -# sysctl -w net.ipv4.tcp_rmem="10000000 10000000 10000000" -# sysctl -w net.ipv4.tcp_wmem="10000000 10000000 10000000" - -Transmit performance: -a. By default, the driver respects BIOS settings for PCI bus parameters. -However, you may want to experiment with PCI bus parameters -max-split-transactions(MOST) and MMRBC (use setpci command). -A MOST value of 2 has been found optimal for Opterons and 3 for Itanium. -It could be different for your hardware. -Set MMRBC to 4K**. - -For example you can set -For opteron -#setpci -d 17d5:* 62=1d -For Itanium -#setpci -d 17d5:* 62=3d - -For detailed description of the PCI registers, please see Xframe User Guide. - -b. Ensure Transmit Checksum offload is enabled. Use ethtool to set/verify this -parameter. -c. Turn on TSO(using "ethtool -K") -# ethtool -K <ethX> tso on - -Receive performance: -a. By default, the driver respects BIOS settings for PCI bus parameters. -However, you may want to set PCI latency timer to 248. -#setpci -d 17d5:* LATENCY_TIMER=f8 -For detailed description of the PCI registers, please see Xframe User Guide. -b. Use 2-buffer mode. This results in large performance boost on -certain platforms(eg. SGI Altix, IBM xSeries). -c. Ensure Receive Checksum offload is enabled. Use "ethtool -K ethX" command to -set/verify this option. -d. Enable NAPI feature(in kernel configuration Device Drivers ---> Network -device support ---> Ethernet (10000 Mbit) ---> S2IO 10Gbe Xframe NIC) to -bring down CPU utilization. - -** For AMD opteron platforms with 8131 chipset, MMRBC=1 and MOST=1 are -recommended as safe parameters. -For more information, please review the AMD8131 errata at -http://vip.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/ -26310_AMD-8131_HyperTransport_PCI-X_Tunnel_Revision_Guide_rev_3_18.pdf - -6. Support -For further support please contact either your 10GbE Xframe NIC vendor (IBM, -HP, SGI etc.) |