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Message-Id: <1292048241-22026-6-git-send-email-jeffrey.t.kirsher@intel.com>
Date: Fri, 10 Dec 2010 22:16:59 -0800
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Jeff Kirsher <jeffrey.t.kirsher@...el.com>, netdev@...r.kernel.org,
gospo@...hat.com, bphilips@...ell.com
Subject: [PATCH 05/27] Documentation/networking/ixgbe.txt: Update ixgbe documentation
Update Intel Wired LAN ixgbe documentation.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
Documentation/networking/ixgbe.txt | 211 +++++++++++++++++++++++-------------
1 files changed, 136 insertions(+), 75 deletions(-)
diff --git a/Documentation/networking/ixgbe.txt b/Documentation/networking/ixgbe.txt
index eeb6868..9ade280 100644
--- a/Documentation/networking/ixgbe.txt
+++ b/Documentation/networking/ixgbe.txt
@@ -1,107 +1,126 @@
Linux Base Driver for 10 Gigabit PCI Express Intel(R) Network Connection
========================================================================
-March 10, 2009
-
+Intel Gigabit Linux driver.
+Copyright(c) 1999 - 2010 Intel Corporation.
Contents
========
-- In This Release
- Identifying Your Adapter
-- Building and Installation
- Additional Configurations
+- Performance Tuning
+- Known Issues
- Support
+Identifying Your Adapter
+========================
+The driver in this release is compatible with 82598 and 82599-based Intel
+Network Connections.
-In This Release
-===============
+For more information on how to identify your adapter, go to the Adapter &
+Driver ID Guide at:
-This file describes the ixgbe Linux Base Driver for the 10 Gigabit PCI
-Express Intel(R) Network Connection. This driver includes support for
-Itanium(R)2-based systems.
+ http://support.intel.com/support/network/sb/CS-012904.htm
-For questions related to hardware requirements, refer to the documentation
-supplied with your 10 Gigabit adapter. All hardware requirements listed apply
-to use with Linux.
+SFP+ Devices with Pluggable Optics
+----------------------------------
-The following features are available in this kernel:
- - Native VLANs
- - Channel Bonding (teaming)
- - SNMP
- - Generic Receive Offload
- - Data Center Bridging
+82599-BASED ADAPTERS
-Channel Bonding documentation can be found in the Linux kernel source:
-/Documentation/networking/bonding.txt
+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.
-Ethtool, lspci, and ifconfig can be used to display device and driver
-specific information.
+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
-Identifying Your Adapter
-========================
+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
-This driver supports devices based on the 82598 controller and the 82599
-controller.
+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.
-For specific information on identifying which adapter you have, please visit:
+Supplier Type Part Numbers
- http://support.intel.com/support/network/sb/CS-008441.htm
+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
-Building and Installation
-=========================
+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.
-select m for "Intel(R) 10GbE PCI Express adapters support" located at:
- Location:
- -> Device Drivers
- -> Network device support (NETDEVICES [=y])
- -> Ethernet (10000 Mbit) (NETDEV_10000 [=y])
+Laser turns off for SFP+ when ifconfig down
+-------------------------------------------
+"ifconfig down" turns off the laser for 82599-based SFP+ fiber adapters.
+"ifconfig up" turns on the later.
-1. make modules & make modules_install
-2. Load the module:
+82598-BASED ADAPTERS
-# modprobe ixgbe
+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 insmod command can be used if the full
- path to the driver module is specified. For example:
+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.
- insmod /lib/modules/<KERNEL VERSION>/kernel/drivers/net/ixgbe/ixgbe.ko
+Supplier Type Part Numbers
- With 2.6 based kernels also make sure that older ixgbe drivers are
- removed from the kernel, before loading the new module:
+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
- rmmod ixgbe; modprobe ixgbe
+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.
-3. Assign an IP address to the interface by entering the following, where
- x is the interface number:
- ifconfig ethx <IP_address>
+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.
-4. Verify that the interface works. Enter the following, where <IP_address>
- is the IP address for another machine on the same subnet as the interface
- that is being tested:
+Flow Control is enabled by default. If you want to disable a flow control
+capable link partner, use Ethtool:
- ping <IP_address>
+ 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.
Additional Configurations
=========================
- Viewing Link Messages
- ---------------------
- Link messages will not be displayed to the console if the distribution is
- restricting system messages. In order to see network driver link messages on
- your console, set dmesg to eight by entering the following:
-
- dmesg -n 8
-
- NOTE: This setting is not saved across reboots.
-
-
Jumbo Frames
------------
The driver supports Jumbo Frames for all adapters. Jumbo Frames support is
@@ -123,13 +142,8 @@ Additional Configurations
other protocols besides TCP. It's also safe to use with configurations that
are problematic for LRO, namely bridging and iSCSI.
- GRO is enabled by default in the driver. Future versions of ethtool will
- support disabling and re-enabling GRO on the fly.
-
-
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.
@@ -163,24 +177,71 @@ Additional Configurations
http://e1000.sf.net
-
Ethtool
-------
The driver utilizes the ethtool interface for driver configuration and
- diagnostics, as well as displaying statistical information. Ethtool
- version 3.0 or later is required for this functionality.
+ 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://sourceforge.net/projects/gkernel.
-
- NAPI
+ 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@...ts.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 Microsoft* Windows* Server 2008 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.
- NAPI (Rx polling mode) is supported in the ixgbe driver. NAPI is enabled
- by default in the driver.
+ 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:
- See www.cyberus.ca/~hadi/usenix-paper.tgz for more information on NAPI.
+ "-cpu qemu64,model=13"
Support
--
1.7.3.2
--
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