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diff --git a/kernel/Documentation/networking/ixgbe.txt b/kernel/Documentation/networking/ixgbe.txt new file mode 100644 index 000000000..6f0cb57b5 --- /dev/null +++ b/kernel/Documentation/networking/ixgbe.txt @@ -0,0 +1,349 @@ +Linux* Base Driver for the Intel(R) Ethernet 10 Gigabit PCI Express Family of +Adapters +============================================================================= + +Intel 10 Gigabit Linux driver. +Copyright(c) 1999 - 2013 Intel Corporation. + +Contents +======== + +- Identifying Your Adapter +- Additional Configurations +- Performance Tuning +- Known Issues +- Support + +Identifying Your Adapter +======================== + +The driver in this release is compatible with 82598, 82599 and X540-based +Intel Network Connections. + +For more information on how to identify your adapter, go to the Adapter & +Driver ID Guide at: + + http://support.intel.com/support/network/sb/CS-012904.htm + +SFP+ Devices with Pluggable Optics +---------------------------------- + +82599-BASED ADAPTERS + +NOTES: If your 82599-based Intel(R) Network Adapter came with Intel optics, or +is an Intel(R) Ethernet Server Adapter X520-2, then it only supports Intel +optics and/or the direct attach cables listed below. + +When 82599-based SFP+ devices are connected back to back, they should be set to +the same Speed setting via ethtool. Results may vary if you mix speed settings. +82598-based adapters support all passive direct attach cables that comply +with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. Active direct attach +cables are not supported. + +Supplier Type Part Numbers + +SR Modules +Intel DUAL RATE 1G/10G SFP+ SR (bailed) FTLX8571D3BCV-IT +Intel DUAL RATE 1G/10G SFP+ SR (bailed) AFBR-703SDDZ-IN1 +Intel DUAL RATE 1G/10G SFP+ SR (bailed) AFBR-703SDZ-IN2 +LR Modules +Intel DUAL RATE 1G/10G SFP+ LR (bailed) FTLX1471D3BCV-IT +Intel DUAL RATE 1G/10G SFP+ LR (bailed) AFCT-701SDDZ-IN1 +Intel DUAL RATE 1G/10G SFP+ LR (bailed) AFCT-701SDZ-IN2 + +The following is a list of 3rd party SFP+ modules and direct attach cables that +have received some testing. Not all modules are applicable to all devices. + +Supplier Type Part Numbers + +Finisar SFP+ SR bailed, 10g single rate FTLX8571D3BCL +Avago SFP+ SR bailed, 10g single rate AFBR-700SDZ +Finisar SFP+ LR bailed, 10g single rate FTLX1471D3BCL + +Finisar DUAL RATE 1G/10G SFP+ SR (No Bail) FTLX8571D3QCV-IT +Avago DUAL RATE 1G/10G SFP+ SR (No Bail) AFBR-703SDZ-IN1 +Finisar DUAL RATE 1G/10G SFP+ LR (No Bail) FTLX1471D3QCV-IT +Avago DUAL RATE 1G/10G SFP+ LR (No Bail) AFCT-701SDZ-IN1 +Finistar 1000BASE-T SFP FCLF8522P2BTL +Avago 1000BASE-T SFP ABCU-5710RZ + +82599-based adapters support all passive and active limiting direct attach +cables that comply with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. + +Laser turns off for SFP+ when device is down +------------------------------------------- +"ip link set down" turns off the laser for 82599-based SFP+ fiber adapters. +"ip link set up" turns on the laser. + + +82598-BASED ADAPTERS + +NOTES for 82598-Based Adapters: +- Intel(R) Network Adapters that support removable optical modules only support + their original module type (i.e., the Intel(R) 10 Gigabit SR Dual Port + Express Module only supports SR optical modules). If you plug in a different + type of module, the driver will not load. +- Hot Swapping/hot plugging optical modules is not supported. +- Only single speed, 10 gigabit modules are supported. +- LAN on Motherboard (LOMs) may support DA, SR, or LR modules. Other module + types are not supported. Please see your system documentation for details. + +The following is a list of 3rd party SFP+ modules and direct attach cables that +have received some testing. Not all modules are applicable to all devices. + +Supplier Type Part Numbers + +Finisar SFP+ SR bailed, 10g single rate FTLX8571D3BCL +Avago SFP+ SR bailed, 10g single rate AFBR-700SDZ +Finisar SFP+ LR bailed, 10g single rate FTLX1471D3BCL + +82598-based adapters support all passive direct attach cables that comply +with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. Active direct attach +cables are not supported. + + +Flow Control +------------ +Ethernet Flow Control (IEEE 802.3x) can be configured with ethtool to enable +receiving and transmitting pause frames for ixgbe. When TX is enabled, PAUSE +frames are generated when the receive packet buffer crosses a predefined +threshold. When rx is enabled, the transmit unit will halt for the time delay +specified when a PAUSE frame is received. + +Flow Control is enabled by default. If you want to disable a flow control +capable link partner, use ethtool: + + ethtool -A eth? autoneg off RX off TX off + +NOTE: For 82598 backplane cards entering 1 gig mode, flow control default +behavior is changed to off. Flow control in 1 gig mode on these devices can +lead to Tx hangs. + +Intel(R) Ethernet Flow Director +------------------------------- +Supports advanced filters that direct receive packets by their flows to +different queues. Enables tight control on routing a flow in the platform. +Matches flows and CPU cores for flow affinity. Supports multiple parameters +for flexible flow classification and load balancing. + +Flow director is enabled only if the kernel is multiple TX queue capable. + +An included script (set_irq_affinity.sh) automates setting the IRQ to CPU +affinity. + +You can verify that the driver is using Flow Director by looking at the counter +in ethtool: fdir_miss and fdir_match. + +Other ethtool Commands: +To enable Flow Director + ethtool -K ethX ntuple on +To add a filter + Use -U switch. e.g., ethtool -U ethX flow-type tcp4 src-ip 10.0.128.23 + action 1 +To see the list of filters currently present: + ethtool -u ethX + +Perfect Filter: Perfect filter is an interface to load the filter table that +funnels all flow into queue_0 unless an alternative queue is specified using +"action". In that case, any flow that matches the filter criteria will be +directed to the appropriate queue. + +If the queue is defined as -1, filter will drop matching packets. + +To account for filter matches and misses, there are two stats in ethtool: +fdir_match and fdir_miss. In addition, rx_queue_N_packets shows the number of +packets processed by the Nth queue. + +NOTE: Receive Packet Steering (RPS) and Receive Flow Steering (RFS) are not +compatible with Flow Director. IF Flow Director is enabled, these will be +disabled. + +The following three parameters impact Flow Director. + +FdirMode +-------- +Valid Range: 0-2 (0=off, 1=ATR, 2=Perfect filter mode) +Default Value: 1 + + Flow Director filtering modes. + +FdirPballoc +----------- +Valid Range: 0-2 (0=64k, 1=128k, 2=256k) +Default Value: 0 + + Flow Director allocated packet buffer size. + +AtrSampleRate +-------------- +Valid Range: 1-100 +Default Value: 20 + + Software ATR Tx packet sample rate. For example, when set to 20, every 20th + packet, looks to see if the packet will create a new flow. + +Node +---- +Valid Range: 0-n +Default Value: 1 (off) + + 0 - n: where n is the number of NUMA nodes (i.e. 0 - 3) currently online in + your system + 1: turns this option off + + The Node parameter will allow you to pick which NUMA node you want to have + the adapter allocate memory on. + +max_vfs +------- +Valid Range: 1-63 +Default Value: 0 + + If the value is greater than 0 it will also force the VMDq parameter to be 1 + or more. + + This parameter adds support for SR-IOV. It causes the driver to spawn up to + max_vfs worth of virtual function. + + +Additional Configurations +========================= + + Jumbo Frames + ------------ + The driver supports Jumbo Frames for all adapters. Jumbo Frames support is + enabled by changing the MTU to a value larger than the default of 1500. + The maximum value for the MTU is 16110. Use the ip command to + increase the MTU size. For example: + + ip link set dev ethx mtu 9000 + + The maximum MTU setting for Jumbo Frames is 9710. This value coincides + with the maximum Jumbo Frames size of 9728. + + Generic Receive Offload, aka GRO + -------------------------------- + The driver supports the in-kernel software implementation of GRO. GRO has + shown that by coalescing Rx traffic into larger chunks of data, CPU + utilization can be significantly reduced when under large Rx load. GRO is an + evolution of the previously-used LRO interface. GRO is able to coalesce + other protocols besides TCP. It's also safe to use with configurations that + are problematic for LRO, namely bridging and iSCSI. + + Data Center Bridging, aka DCB + ----------------------------- + DCB is a configuration Quality of Service implementation in hardware. + It uses the VLAN priority tag (802.1p) to filter traffic. That means + that there are 8 different priorities that traffic can be filtered into. + It also enables priority flow control which can limit or eliminate the + number of dropped packets during network stress. Bandwidth can be + allocated to each of these priorities, which is enforced at the hardware + level. + + To enable DCB support in ixgbe, you must enable the DCB netlink layer to + allow the userspace tools (see below) to communicate with the driver. + This can be found in the kernel configuration here: + + -> Networking support + -> Networking options + -> Data Center Bridging support + + Once this is selected, DCB support must be selected for ixgbe. This can + be found here: + + -> Device Drivers + -> Network device support (NETDEVICES [=y]) + -> Ethernet (10000 Mbit) (NETDEV_10000 [=y]) + -> Intel(R) 10GbE PCI Express adapters support + -> Data Center Bridging (DCB) Support + + After these options are selected, you must rebuild your kernel and your + modules. + + In order to use DCB, userspace tools must be downloaded and installed. + The dcbd tools can be found at: + + http://e1000.sf.net + + Ethtool + ------- + The driver utilizes the ethtool interface for driver configuration and + diagnostics, as well as displaying statistical information. The latest + ethtool version is required for this functionality. + + The latest release of ethtool can be found from + http://ftp.kernel.org/pub/software/network/ethtool/ + + FCoE + ---- + This release of the ixgbe driver contains new code to enable users to use + Fiber Channel over Ethernet (FCoE) and Data Center Bridging (DCB) + functionality that is supported by the 82598-based hardware. This code has + no default effect on the regular driver operation, and configuring DCB and + FCoE is outside the scope of this driver README. Refer to + http://www.open-fcoe.org/ for FCoE project information and contact + e1000-eedc@lists.sourceforge.net for DCB information. + + MAC and VLAN anti-spoofing feature + ---------------------------------- + When a malicious driver attempts to send a spoofed packet, it is dropped by + the hardware and not transmitted. An interrupt is sent to the PF driver + notifying it of the spoof attempt. + + When a spoofed packet is detected the PF driver will send the following + message to the system log (displayed by the "dmesg" command): + + Spoof event(s) detected on VF (n) + + Where n=the VF that attempted to do the spoofing. + + +Performance Tuning +================== + +An excellent article on performance tuning can be found at: + +http://www.redhat.com/promo/summit/2008/downloads/pdf/Thursday/Mark_Wagner.pdf + + +Known Issues +============ + + Enabling SR-IOV in a 32-bit or 64-bit Microsoft* Windows* Server 2008/R2 + Guest OS using Intel (R) 82576-based GbE or Intel (R) 82599-based 10GbE + controller under KVM + ------------------------------------------------------------------------ + KVM Hypervisor/VMM supports direct assignment of a PCIe device to a VM. This + includes traditional PCIe devices, as well as SR-IOV-capable devices using + Intel 82576-based and 82599-based controllers. + + While direct assignment of a PCIe device or an SR-IOV Virtual Function (VF) + to a Linux-based VM running 2.6.32 or later kernel works fine, there is a + known issue with Microsoft Windows Server 2008 VM that results in a "yellow + bang" error. This problem is within the KVM VMM itself, not the Intel driver, + or the SR-IOV logic of the VMM, but rather that KVM emulates an older CPU + model for the guests, and this older CPU model does not support MSI-X + interrupts, which is a requirement for Intel SR-IOV. + + If you wish to use the Intel 82576 or 82599-based controllers in SR-IOV mode + with KVM and a Microsoft Windows Server 2008 guest try the following + workaround. The workaround is to tell KVM to emulate a different model of CPU + when using qemu to create the KVM guest: + + "-cpu qemu64,model=13" + + +Support +======= + +For general information, go to the Intel support website at: + + http://support.intel.com + +or the Intel Wired Networking project hosted by Sourceforge at: + + http://e1000.sourceforge.net + +If an issue is identified with the released source code on the supported +kernel with a supported adapter, email the specific information related +to the issue to e1000-devel@lists.sf.net |