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Device Drivers & /dev files                                         e1000g(4D)

       e1000g, e1000 - Intel PRO/1000 Gigabit family of network interface con‐


       The e1000g Gigabit Ethernet driver is a multi-threaded, loadable, clon‐
       able, GLD-based STREAMS driver supporting the Data Link Provider Inter‐
       face, dlpi(4P), over Intel PRO/1000 family of Gigabit controllers. This
       driver supports multiple Intel Gigabit controllers installed within the
       system. The e1000g driver provides basic support  including  chip  ini‐
       tialization,  frame  transmit and receive, multicast support, and error
       recovery and reporting.

       The cloning character-special device, /dev/e1000g, is  used  to  access
       all Intel Gigabit devices installed within the system.

       The  e1000g  driver  is  managed  by the dladm(8) command line utility,
       which allows VLANs to be defined on top of  e1000g  instances  and  for
       e1000g instances to be aggregated. See dladm(8) for more details.

       You must send an explicit DL_ATTACH_REQ message to associate the opened
       stream with a particular device (PPA). The PPA ID is interpreted as  an
       unsigned  integer  data  type  and  indicates  the corresponding device
       instance (unit) number. The driver returns an error  (DL_ERROR_ACK)  if
       the PPA field value does not correspond to a valid device instance num‐

       The values returned by the  driver  in  the  DL_INFO_ACK  primitive  in
       response to the DL_INFO_REQ are as follows:

           o      Maximum SDU (with jumbo frame) is as high as 16298.

           o      Minimum  SDU is 0. The driver pads to the mandatory 60-octet
                  minimum packet size.

           o      The dlsap address length is 8.

           o      MAC type is DL_ETHER.

           o      The sap length value is −2, means that the physical  address
                  component  is followed immediately by a 2-byte sap component
                  within the DLSAP address.

           o      The  broadcast  address  value  is  Ethernet/IEEE  broadcast
                  address (FF:FF:FF:FF:FF:FF).

       The e1000g driver is managed by the dladm(8) command line utility.

       By  default,  the e1000g driver performs auto-negotiation to select the
       link speed and mode. Link speed and mode can be any one of the  follow‐
       ing, as described in the IEEE 803.2 standard:

         1000Mbps full duplex
         100Mbps full duplex
         100Mbps half duplex
         10Mbps full duplex
         10Mbps half duplex

       Note -

         The link mode of 1000Mbps half duplex is not supported.

       Forced link mode of 1000Mbps full duplex is not supported.

       The e1000g driver does not support the use of shared RAM on the board.

   Configuration File Options
       The following e1000g.conf configuration options are supported:


           This is a bitmap for the speeds advertised during auto-negotiation.

             Bit    |  7  |  6  |   5   |   4   |  3   |  2   |  1  |  0
             Setting| N/A | N/A | 1000F |  N/A  | 100F | 100H | 10F | 10H

           The adapter only auto-negotiates to a speed that is advertised. For
           example: AutoNegAdvertised = 4 causes an adapter to only  advertise
           auto-negotiation at 100 Mbps, full duplex. No other link speeds are
           accepted or  given  during  auto-negotiation.  AutoNegAdvertised=47
           advertises  all  speeds  available,  This  is the same as using the
           default setting of 0.

           0-255    Allowed values

           0        Default


           Specifies the speed and duplex mode for each instance.

           If you set ForceSpeedDuplex=7,4, the e1000g0 is set to auto-negoti‐
           ate  and  e1000g1  is set to 100 Mbps, full duplex. Note that fiber
           optic Ethernet adapters ignore this setting.

           Allowed values are:

           1    10 Megabits per second, Half Duplex.

           2    10 Megabits per second, Full Duplex.

           3    100 Megabits per second, Half Duplex.

           4    100 Megabits per second, Full Duplex.

           7    Auto-negotiate speed and duplex. (Default).


           Upper limit on the maximum MTU size that  the  driver  allows.  All
           Intel  gigabit  adapters  (except  the  82542-based  Intel PRO/1000
           adapter) allow the configuration of jumbo frames.

           For an Intel PRO/1000 adapter that is later than  82571  (including
           82571),  the  maximum  MTU accepted by the MAC is 9216. For others,
           the maximum MTU accepted by the MAC is 16298.  To  configure  jumbo
           frames,  use  e1000g.conf. Using dladm(8) with the adapter instance
           and the mtu argument configures adapter for the  maximum  allowable
           jumbo frame size.

           Allowed values are:

           0    Standard Ethernet frames with a MTU equal to 1500. (Default).

           1    Jumbo frames with a maximum MTU of 4010.

           2    Jumbo frames with a maximum MTU of 8106.

           3    Jumbo frames with a maximum MTU of 16298.


           Flow  control  utilizes Ethernet XON and unicast and multicast XOFF
           packets to allow Ethernet equipment to slow down the stream of data
           between two Ethernet devices.

           Allowed values are:

           0    Disable.  Packets  can  get  dropped in high-throughput situa‐
                tions, leading to reduced network performance.

           1    Receive only.

           2    Transmit only.

           3    Receive and transmit. (Default).

           4    Use adapter's EEPROM-programmed factory default setting.


           You must enable this feature on Intel 82543CG-based copper adapters
           to operate correctly with TBI mode Ethernet hardware.

           Allowed values are:

           0    Disable.

           1    Enable. (Default).


           Controls  the  PHY master/slave setting. Manually forcing master or
           slave can reduce time needed to link with Planex 08TX and  IO  data
           switches. This setting should remain as the hardware default.

           Allowed values are:

           0    Hardware default. (Default).

           1    Force master.

           2    Force slave.

           3    Force auto.

       By  default,  the  following configuration options are not displayed in
       the e1000g.conf file. Although they are configurable,  you  should  not
       change these options:

       NumRxDescriptors        Number of available receive descriptors. Multi‐
                               ple receive descriptors increase  receive  per‐
                               formance, but decrease available memory.

                               80-4096    Allowed values.

                               2048       Default. (MTU < 4010).

                               1024       Default. (MTU >= 4010).

       NumTxDescriptors        Number of transmit descriptors available to the
                               driver. Multiple transmit descriptors  increase
                               transmit  performance,  but  decrease available

                               80-4096    Allowed values.

                               2048       Default. (MTU < 4010).

                               1024       Default. (MTU >= 4010).

       NumRxFreeList           Number of pre-allocated buffers that the driver
                               can  use for received data. Pre-allocating buf‐
                               fers  can  improve  receive   performance   but
                               decrease available memory.

                               60-4096    Allowed values.

                               4096       Default. (MTU < 4010).

                               2048       Default. (MTU >= 4010).

       NumTxFreeList           Number of pre-allocated buffers that the driver
                               can use for transmit data. Pre-allocating  buf‐
                               fers   can  improve  transmit  performance  but
                               decrease available memory.

                               80-4096    Allowed values.

                               2304       Default. (MTU < 4010).

                               1152       Default. (MTU >= 4010).

       MaxNumReceivePackets    Maximum number  of  receive  packets  that  the
                               driver can handle for each interrupt.

                               CPU  utilization  can  be  lowered through more
                               efficient interrupt management. If  this  value
                               is  increased,  the  time  needed by the CPU to
                               process the  individual  interrupts  increases,
                               thereby  nullifying any performance gains real‐
                               ized by handling less interrupts.

                               0-1024    Allowed values.

                               32        Default.

       dev/e1000g                    Character special device.

       /kernel/drv/e1000g.conf       Driver configuration file.

       /kernel/drv/sparcv9/e1000g    SPARC kernel module.

       /kernel/drv/amd64/e1000g      x86 kernel module.

       See attributes(7) for descriptions of the following attributes:

       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE  TYPEAT‐
       TRIBUTE VALUE _ ArchitectureSPARC, x86

       dlpi(4P), attributes(7), dladm(8), ifconfig(8), kstat(8), ping(8)

       Intel PRO/1000 Gigabit Adapter Driver Installation Notes for Solaris

       Writing Device Drivers in Oracle Solaris 11.4

       STREAMS Programming Guide

       Managing Network Virtualization and Network Resources in Oracle Solaris

       Managing Network Datalinks in Oracle Solaris 11.4

Oracle Solaris 11.4               11 May 2021                       e1000g(4D)
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