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+Linux* Base Driver for the Intel(R) PRO/1000 Family of Adapters
+===============================================================
+
+November 17, 2004
+
+
+Contents
+========
+
+- In This Release
+- Identifying Your Adapter
+- Command Line Parameters
+- Speed and Duplex Configuration
+- Additional Configurations
+- Known Issues
+- Support
+
+
+In This Release
+===============
+
+This file describes the Linux* Base Driver for the Intel(R) PRO/1000 Family
+of Adapters, version 5.x.x.  
+
+For questions related to hardware requirements, refer to the documentation 
+supplied with your Intel PRO/1000 adapter. All hardware requirements listed 
+apply to use with Linux.
+
+Native VLANs are now available with supported kernels.
+
+Identifying Your Adapter
+========================
+
+For more information on how to identify your adapter, go to the Adapter & 
+Driver ID Guide at:
+
+    http://support.intel.com/support/network/adapter/pro100/21397.htm
+
+For the latest Intel network drivers for Linux, refer to the following 
+website. In the search field, enter your adapter name or type, or use the 
+networking link on the left to search for your adapter:
+
+    http://downloadfinder.intel.com/scripts-df/support_intel.asp
+
+Command Line Parameters
+=======================
+
+If the driver is built as a module, the  following optional parameters are 
+used by entering them on the command line with the modprobe or insmod command
+using this syntax:
+
+     modprobe e1000 [<option>=<VAL1>,<VAL2>,...]
+
+     insmod e1000 [<option>=<VAL1>,<VAL2>,...] 
+
+For example, with two PRO/1000 PCI adapters, entering:
+
+     insmod e1000 TxDescriptors=80,128
+
+loads the e1000 driver with 80 TX descriptors for the first adapter and 128 TX 
+descriptors for the second adapter.
+
+The default value for each parameter is generally the recommended setting,
+unless otherwise noted. Also, if the driver is statically built into the
+kernel, the driver is loaded with the default values for all the parameters.
+Ethtool can be used to change some of the parameters at runtime.
+
+    NOTES: For more information about the AutoNeg, Duplex, and Speed
+           parameters, see the "Speed and Duplex Configuration" section in 
+           this document.
+
+           For more information about the InterruptThrottleRate, RxIntDelay, 
+           TxIntDelay, RxAbsIntDelay, and TxAbsIntDelay parameters, see the 
+           application note at:
+           http://www.intel.com/design/network/applnots/ap450.htm
+
+           A descriptor describes a data buffer and attributes related to the 
+           data buffer. This information is accessed by the hardware.
+
+AutoNeg (adapters using copper connections only)
+Valid Range: 0x01-0x0F, 0x20-0x2F
+Default Value: 0x2F
+    This parameter is a bit mask that specifies which speed and duplex
+    settings the board advertises. When this parameter is used, the Speed and
+    Duplex parameters must not be specified.
+    NOTE: Refer to the Speed and Duplex section of this readme for more 
+          information on the AutoNeg parameter.  
+
+Duplex (adapters using copper connections only)
+Valid Range: 0-2 (0=auto-negotiate, 1=half, 2=full)
+Default Value: 0
+    Defines the direction in which data is allowed to flow. Can be either one 
+    or two-directional. If both Duplex and the link partner are set to auto-
+    negotiate, the board auto-detects the correct duplex. If the link partner
+    is forced (either full or half), Duplex defaults to half-duplex.
+
+FlowControl
+Valid Range: 0-3 (0=none, 1=Rx only, 2=Tx only, 3=Rx&Tx)
+Default: Read flow control settings from the EEPROM
+    This parameter controls the automatic generation(Tx) and response(Rx) to 
+    Ethernet PAUSE frames.
+
+InterruptThrottleRate
+Valid Range: 100-100000 (0=off, 1=dynamic)
+Default Value: 8000
+    This value represents the maximum number of interrupts per second the 
+    controller generates. InterruptThrottleRate is another setting used in 
+    interrupt moderation. Dynamic mode uses a heuristic algorithm to adjust 
+    InterruptThrottleRate based on the current traffic load.
+Un-supported Adapters: InterruptThrottleRate is NOT supported by 82542, 82543
+    or 82544-based adapters.
+
+    NOTE: InterruptThrottleRate takes precedence over the TxAbsIntDelay and 
+          RxAbsIntDelay parameters. In other words, minimizing the receive 
+          and/or transmit absolute delays does not force the controller to 
+          generate more interrupts than what the Interrupt Throttle Rate 
+          allows.
+    CAUTION: If you are using the Intel PRO/1000 CT Network Connection 
+             (controller 82547), setting InterruptThrottleRate to a value 
+             greater than 75,000, may hang (stop transmitting) adapters under 
+             certain network conditions. If this occurs a NETDEV WATCHDOG 
+             message is logged in the system event log. In addition, the 
+             controller is automatically reset, restoring the network 
+             connection. To eliminate the potential for the hang, ensure 
+             that InterruptThrottleRate is set no greater than 75,000 and is 
+             not set to 0.
+    NOTE: When e1000 is loaded with default settings and multiple adapters are 
+          in use simultaneously, the CPU utilization may increase non-linearly. 
+          In order to limit the CPU utilization without impacting the overall 
+          throughput, we recommend that you load the driver as follows:
+
+              insmod e1000.o InterruptThrottleRate=3000,3000,3000
+
+          This sets the InterruptThrottleRate to 3000 interrupts/sec for the 
+          first, second, and third instances of the driver. The range of 2000 to 
+          3000 interrupts per second works on a majority of systems and is a 
+          good starting point, but the optimal value will be platform-specific. 
+          If CPU utilization is not a concern, use RX_POLLING (NAPI) and default 
+          driver settings.
+
+RxDescriptors
+Valid Range: 80-256 for 82542 and 82543-based adapters
+             80-4096 for all other supported adapters
+Default Value: 256
+    This value is the number of receive descriptors allocated by the driver. 
+    Increasing this value allows the driver to buffer more incoming packets. 
+    Each descriptor is 16 bytes.  A receive buffer is allocated for each
+    descriptor and can either be 2048 or 4096 bytes long, depending on the MTU 
+
+    setting. An incoming packet can span one or more receive descriptors. 
+    The maximum MTU size is 16110.
+
+    NOTE: MTU designates the frame size. It only needs to be set for Jumbo 
+          Frames.
+    NOTE: Depending on the available system resources, the request for a
+    higher number of receive descriptors may be denied.  In this case,
+    use a lower number.
+
+RxIntDelay
+Valid Range: 0-65535 (0=off)
+Default Value: 0
+    This value delays the generation of receive interrupts in units of 1.024 
+    microseconds.  Receive interrupt reduction can improve CPU efficiency if 
+    properly tuned for specific network traffic. Increasing this value adds 
+    extra latency to frame reception and can end up decreasing the throughput 
+    of TCP traffic. If the system is reporting dropped receives, this value 
+    may be set too high, causing the driver to run out of available receive 
+    descriptors.
+
+    CAUTION: When setting RxIntDelay to a value other than 0, adapters may 
+             hang (stop transmitting) under certain network conditions. If 
+             this occurs a NETDEV WATCHDOG message is logged in the system
+             event log. In addition, the controller is automatically reset, 
+             restoring the network connection. To eliminate the potential for
+             the hang ensure that RxIntDelay is set to 0.
+
+RxAbsIntDelay (82540, 82545 and later adapters only)
+Valid Range: 0-65535 (0=off)
+Default Value: 128
+    This value, in units of 1.024 microseconds, limits the delay in which a 
+    receive interrupt is generated. Useful only if RxIntDelay is non-zero, 
+    this value ensures that an interrupt is generated after the initial 
+    packet is received within the set amount of time.  Proper tuning,
+    along with RxIntDelay, may improve traffic throughput in specific network
+    conditions.
+
+Speed (adapters using copper connections only)
+Valid Settings: 0, 10, 100, 1000
+Default Value: 0 (auto-negotiate at all supported speeds)
+    Speed forces the line speed to the specified value in megabits per second
+    (Mbps). If this parameter is not specified or is set to 0 and the link 
+    partner is set to auto-negotiate, the board will auto-detect the correct 
+    speed. Duplex should also be set when Speed is set to either 10 or 100.
+
+TxDescriptors
+Valid Range: 80-256 for 82542 and 82543-based adapters
+             80-4096 for all other supported adapters
+Default Value: 256
+    This value is the number of transmit descriptors allocated by the driver.
+    Increasing this value allows the driver to queue more transmits. Each 
+    descriptor is 16 bytes.
+
+    NOTE: Depending on the available system resources, the request for a
+    higher number of transmit descriptors may be denied.  In this case,
+    use a lower number.
+
+TxIntDelay
+Valid Range: 0-65535 (0=off)
+Default Value: 64
+    This value delays the generation of transmit interrupts in units of 
+    1.024 microseconds. Transmit interrupt reduction can improve CPU
+    efficiency if properly tuned for specific network traffic. If the
+    system is reporting dropped transmits, this value may be set too high
+    causing the driver to run out of available transmit descriptors.
+
+TxAbsIntDelay (82540, 82545 and later adapters only)
+Valid Range: 0-65535 (0=off)
+Default Value: 64
+    This value, in units of 1.024 microseconds, limits the delay in which a 
+    transmit interrupt is generated. Useful only if TxIntDelay is non-zero, 
+    this value ensures that an interrupt is generated after the initial 
+    packet is sent on the wire within the set amount of time.  Proper tuning,
+    along with TxIntDelay, may improve traffic throughput in specific 
+    network conditions.
+
+XsumRX (not available on the 82542-based adapter)
+Valid Range: 0-1
+Default Value: 1
+    A value of '1' indicates that the driver should enable IP checksum
+    offload for received packets (both UDP and TCP) to the adapter hardware.
+
+Speed and Duplex Configuration
+==============================
+
+Three keywords are used to control the speed and duplex configuration. These 
+keywords are Speed, Duplex, and AutoNeg.
+
+If the board uses a fiber interface, these keywords are ignored, and the 
+fiber interface board only links at 1000 Mbps full-duplex.
+
+For copper-based boards, the keywords interact as follows:
+
+  The default operation is auto-negotiate. The board advertises all supported
+  speed and duplex combinations, and it links at the highest common speed and
+  duplex mode IF the link partner is set to auto-negotiate.
+
+  If Speed = 1000, limited auto-negotiation is enabled and only 1000 Mbps is
+  advertised (The 1000BaseT spec requires auto-negotiation.)
+
+  If Speed = 10 or 100, then both Speed and Duplex should be set. Auto-
+  negotiation is disabled, and the AutoNeg parameter is ignored. Partner SHOULD
+  also be forced.
+
+The AutoNeg parameter is used when more control is required over the auto-
+negotiation process. When this parameter is used, Speed and Duplex parameters 
+must not be specified. The following table describes supported values for the 
+AutoNeg parameter:
+
+Speed (Mbps)   		 1000      100    100    10     10
+Duplex                   Full      Full   Half   Full   Half
+Value (in base 16)       0x20      0x08   0x04   0x02   0x01
+
+Example: insmod e1000 AutoNeg=0x03, loads e1000 and specifies (10 full duplex, 
+10 half duplex) for negotiation with the peer.
+
+Note that setting AutoNeg does not guarantee that the board will link at the 
+highest specified speed or duplex mode, but the board will link at the 
+highest possible speed/duplex of the link partner IF the link partner is also
+set to auto-negotiate. If the link partner is forced speed/duplex, the 
+adapter MUST be forced to the same speed/duplex.
+
+
+Additional Configurations
+=========================
+
+  Configuring the Driver on Different Distributions
+  -------------------------------------------------
+
+  Configuring a network driver to load properly when the system is started is
+  distribution dependent. Typically, the configuration process involves adding
+  an alias line to /etc/modules.conf as well as editing other system startup 
+  scripts and/or configuration files. Many popular Linux distributions ship 
+  with tools to make these changes for you. To learn the proper way to 
+  configure a network device for your system, refer to your distribution 
+  documentation. If during this process you are asked for the driver or module 
+  name, the name for the Linux Base Driver for the Intel PRO/1000 Family of 
+  Adapters is e1000.
+
+  As an example, if you install the e1000 driver for two PRO/1000 adapters 
+  (eth0 and eth1) and set the speed and duplex to 10full and 100half, add the 
+  following to modules.conf:
+
+       alias eth0 e1000
+       alias eth1 e1000
+       options e1000 Speed=10,100 Duplex=2,1
+
+  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 except 82542-based 
+  adapters. Jumbo Frames support is enabled by changing the MTU to a value 
+  larger than the default of 1500. Use the ifconfig command to increase the 
+  MTU size. For example:
+
+        ifconfig ethx mtu 9000 up
+
+  The maximum MTU setting for Jumbo Frames is 16110. This value coincides 
+  with the maximum Jumbo Frames size of 16128.
+
+  NOTE: Jumbo Frames are supported at 1000 Mbps only. Using Jumbo Frames at 
+  10 or 100 Mbps may result in poor performance or loss of link.
+
+
+  NOTE: MTU designates the frame size. To enable Jumbo Frames, increase the
+  MTU size on the interface beyond 1500.
+
+  Ethtool
+  -------
+
+  The driver utilizes the ethtool interface for driver configuration and
+  diagnostics, as well as displaying statistical information.  Ethtool
+  version 1.6 or later is required for this functionality.
+
+  The latest release of ethtool can be found from
+  http://sf.net/projects/gkernel.  
+
+  NOTE: Ethtool 1.6 only supports a limited set of ethtool options. Support 
+  for a more complete ethtool feature set can be enabled by upgrading 
+  ethtool to ethtool-1.8.1. 
+
+  Enabling Wake on LAN* (WoL)
+  ---------------------------
+
+  WoL is configured through the Ethtool* utility. Ethtool is included with
+  all versions of Red Hat after Red Hat 7.2. For other Linux distributions, 
+  download and install Ethtool from the following website: 
+  http://sourceforge.net/projects/gkernel.
+
+  For instructions on enabling WoL with Ethtool, refer to the website listed 
+  above.
+
+  WoL will be enabled on the system during the next shut down or reboot. 
+  For this driver version, in order to enable WoL, the e1000 driver must be 
+  loaded when shutting down or rebooting the system.
+
+  NAPI
+  ----
+
+  NAPI (Rx polling mode) is supported in the e1000 driver. NAPI is enabled
+  or disabled based on the configuration of the kernel. 
+
+  See www.cyberus.ca/~hadi/usenix-paper.tgz for more information on NAPI.
+
+
+Known Issues
+============
+
+  Jumbo Frames System Requirement
+  -------------------------------
+
+  Memory allocation failures have been observed on Linux systems with 64 MB 
+  of RAM or less that are running Jumbo Frames. If you are using Jumbo Frames,
+  your system may require more than the advertised minimum requirement of 64 MB
+  of system memory.
+
+
+Support
+=======
+
+For general information, go to the Intel support website at:
+
+    http://support.intel.com
+
+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 linux.nics@intel.com.
+
+
+License
+=======
+
+This software program is released under the terms of a license agreement 
+between you ('Licensee') and Intel. Do not use or load this software or any 
+associated materials (collectively, the 'Software') until you have carefully 
+read the full terms and conditions of the LICENSE located in this software 
+package. By loading or using the Software, you agree to the terms of this 
+Agreement. If you do not agree with the terms of this Agreement, do not 
+install or use the Software.
+
+* Other names and brands may be claimed as the property of others.