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Kirill Smelkov
linux
Commits
8bee0cd9
Commit
8bee0cd9
authored
22 years ago
by
Scott Feldman
Committed by
Jeff Garzik
22 years ago
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e100 4/4:
* updates to Documentation/networking/e100.txt
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2896ddff
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Documentation/networking/e100.txt
View file @
8bee0cd9
Linux* Base Driver for the Intel(R) PRO/100 Family of Adapters
==============================================================
April 9
, 2002
September 16
, 2002
Contents
...
...
@@ -19,26 +19,9 @@ In This Release
===============
This file describes the Linux* Base Driver for the Intel(R) PRO/100 Family of
Adapters, version 2.
0
.x. This driver includes support for Itanium(TM)-based
Adapters, version 2.
1
.x. This driver includes support for Itanium(TM)-based
systems.
New for this release:
- Additional ethtool functionality, including link status test and EEPROM
read/write. A third-party application can use the ethtool interface to
get and set driver parameters.
- Support for Zero copy on 82550-based adapters. This feature provides
faster data throughput and significant CPU usage improvement in systems
that use the relevant system call (sendfile(2)).
- Support for large MTU-enabling interface (1504 bytes) with kernel's
VLAN module
- Support for polling on RX
- Support for Wake On LAN* on 82550 and 82559-based adapters
Supported Adapters
==================
...
...
@@ -96,8 +79,7 @@ CNR PRO/100 VE Desktop Adapter A10386-xxx, A10725-xxx,
To verify that your adapter is supported, find the board ID number on the
adapter. Look for a label that has a barcode and a number in the format
123456-001 (six digits hyphen three digits). Match this to the list of
numbers above.
A12345-001. Match this to the list of numbers above.
For more information on how to identify your adapter, go to the Adapter &
Driver ID Guide at:
...
...
@@ -106,15 +88,20 @@ Driver ID Guide at:
For the latest Intel PRO/100 network driver for Linux, see:
http://
apps
r.intel.com/scripts-df/support_intel.asp
http://
downloadfinde
r.intel.com/scripts-df/support_intel.asp
Command Line Parameters
=======================
The following parameters are used by entering them on the command line with
the modprobe or insmod command. For example, with two Intel PRO/100 PCI
adapters, entering:
The following optional parameters are used by entering them on the command
line with the modprobe or insmod command using this syntax:
modprobe e100 [<option>=<VAL1>,<VAL2>,...]
insmod e100 [<option>=<VAL1>,<VAL2>,...]
For example, with two Intel PRO/100 PCI adapters, entering:
modprobe e100 TxDescriptors=32,128
...
...
@@ -122,16 +109,20 @@ loads the e100 driver with 32 TX resources for the first adapter and 128 TX
resources for the second adapter. This configuration favors the second
adapter. The driver supports up to 16 network adapters concurrently.
The default value for each parameter is generally the recommended setting,
unless otherwise noted.
NOTE: Giving any command line option the value "-1" causes the driver to use
the appropriate default value for that option, as if no value was
specified.
BundleMax
Valid Range:
0x1-0xFFFF
Valid Range:
1-65535
Default Value: 6
This parameter holds the maximum number of packets in a bundle. Suggested
values range from 2 to 10. See "CPU Cycle Saver."
This parameter holds the maximum number of small packets (less than 128
bytes) in a bundle. Suggested values range from 2 to 10. See "CPU Cycle
Saver."
BundleSmallFr
Valid Range: 0-1 (0=off, 1=on)
...
...
@@ -142,48 +133,33 @@ Default Value: 0
e100_speed_duplex
Valid Range: 0-4 (1=10half;2=10full;3=100half;4=100full)
Default Value: 0
The default value of 0 is set to auto-negotiate if the link partner is set
to auto-negotiate. If the link partner is forced, e100_speed_duplex
defaults to half-duplex.
The default value of 0 sets the adapter to auto-negotiate. Other values
set the adapter to forced speed and duplex.
Example usage: insmod e100.o e100_speed_duplex=4,4 (for two adapters)
flow_control
Valid Range: 0-1 (0=off, 1=on)
Default Value: 0
This parameter controls the automatic generation(Tx) and response(Rx) to
Ethernet PAUSE frames. flow_control should NOT be set to 1 when the
e100
Ethernet PAUSE frames. flow_control should NOT be set to 1 when the
adapter is connected to an interface that does not support Ethernet PAUSE
frames and when the e100_speed_duplex parameter is NOT set to zero.
IntDelay
Valid Range: 0-
0xFFFF
(0=off)
Valid Range: 0-
65535
(0=off)
Default Value: 1536
This parameter holds the number of time units (in adapter terminology)
until the adapter generates an interrupt. The recommended value for
IntDelay is
0x600
(upon initialization). Suggested values range from
0x200h to 0x800
. See "CPU Cycle Saver."
IntDelay is
1536
(upon initialization). Suggested values range from
512 to 2048
. See "CPU Cycle Saver."
IFS
Valid Range: 0-1 (0=off, 1=on)
Default Value: 1
Inter Frame Spacing (IFS) aims to reduce the number of Ethernet frame
collisions by altering the time between frame transmissions. When IFS is
enabled the driver tries to find an optimal IFS value. However, some
switches function better when IFS is disabled.
PollingMaxWork
Valid Range: 1-1024 (max number of RxDescriptors)
Default Value: Specified number of RxDescriptors
This value specifies the maximum number of receive packets that are
processed on a single polling call. This parameter is invalid if
RxCongestionControl is set to 0.
RxCongestionControl
Valid Range: 0-1 (0=off, 1=on)
Default Value: 1
1 enables polling mode. When the link is congested, the driver can decide
to handle received packets by polling them, instead of waiting until
interrupts occur.
enabled the driver tries to find an optimal IFS value. It is used only at
half duplex.
RxDescriptors
Valid Range: 8-1024
...
...
@@ -200,13 +176,15 @@ Default Value: 64
Increasing this value allows the protocol stack to queue more transmits at
the driver level. The maximum value for Itanium-based systems is 64.
ucode
(not available for 82557-based adapters)
ucode
Valid Range: 0-1 (0=off, 1=on)
Default Value: 0 for 82558-based adapters
1 for 82559
(and higher)
-based adapters
1 for 82559
, 82550, and 82551
-based adapters
On uploads the micro code to the adapter, which enables CPU Cycle Saver.
See the section "CPU Cycle Saver" below.
Example usage: insmod e100.o ucode=0 (does not reduce CPU usage)
Example usage: insmod e100.o ucode=1
Not available on 82557-based adapters.
XsumRX
Valid Range: 0-1 (0=off, 1=on)
...
...
@@ -214,6 +192,8 @@ Default Value: 1
On allows Rx checksum offloading for TCP/UDP packets. Requires that the
hardware support this feature.
Not available on 82557 and 82558-based adapters.
CPU Cycle Saver
================
...
...
@@ -234,10 +214,11 @@ switching to and from the driver.
CPU Cycle Saver consists of these arguments: IntDelay, BundleMax and
BundleSmallFr. When IntDelay is increased, the adapter waits longer for
frames to arrive before generating the interrupt. By increasing BundleMax,
the network adapter waits for the number of frames specified to arrive before
generating the interrupt. When BundleSmallFr is disabled, the adapter does
not bundle packets that are smaller than 128 bytes. Such small packets are
often, but not always, control packets that are better served immediately.
the network adapter waits for the number of small frames (less than 128 bytes)
specified to arrive before generating the interrupt. When BundleSmallFr is
disabled, the adapter does not bundle small packets. Such small packets are
often, but not always, control packets that are better served immediately;
therefore, BundleSmallFr is disabled by default.
For most users, it is recommended that CPU Cycle Saver be used with the
default values specified in the Command Line Parameters section. However, in
...
...
@@ -249,7 +230,7 @@ ucode=0.
Support
=======
For general information
and support
, go to the Intel support website at:
For general information, go to the Intel support website at:
http://support.intel.com
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