esh(4) [netbsd man page]

ESH(4)							   BSD Kernel Interfaces Manual 						    ESH(4)

NAME

     esh -- RoadRunner-based HIPPI interfaces device driver

SYNOPSIS

     esh* at pci? dev ? function ?

DESCRIPTION

     The esh device driver supports the Essential Communications RoadRunner-based HIPPI interfaces.  With some modifications, the driver could be
     made to support the Gigabit Ethernet card based on the same chip.

     The driver supports both a normal network interface and a raw HIPPI Framing Protocol (HIPPI-FP) device.  The HIPPI-FP interface is accessed
     via the /dev/eshN/ulpN set of devices.  There are 255 available Upper Layer Protocols in FP;  these are selectable via the various device
     entries.

     HIPPI is an 800-megabit/sec networking technology which supports extremely large packet sizes.  In order to efficiently use this network, the
     kernel should be configured with extra mbufs, and the default socket buffer size should be increased to at least 192KB, regardless of the
     expected bandwidth-delay product of the network.

     HIPPI ARP is not widely used, and the NetBSD stack does not support it (yet).  In order to define the mappings between IP addresses and
     ifields (the HIPPI MAC addresses), the administrator must make link-layer entries in the routing table using the route(8) command:

	   route add -interface 129.99.154.101 -llinfo -link esh0:3.0.0.65

MEDIA SELECTION

     Media selection is not yet supported for this device.

SEE ALSO

     intro(4), pci(4), eshconfig(8), ifconfig(8), route(8)

BUGS

     The card must be tuned for proper and efficient DMA operation.  The appropriate values vary based on the system.  The eshconfig(8) program is
     used for this.

BSD
								 January 28, 1998							       BSD

ESHCONFIG(8)						    BSD System Manager's Manual 					      ESHCONFIG(8)

NAME

     eshconfig -- configure Essential Communications' HIPPI network interface

SYNOPSIS

     eshconfig [-estx] [-b bytes] [-c bytes] [-d filename] [-i usecs] [-m bytes] [-r bytes] [-u filename] [-w bytes] [interface]

DESCRIPTION

     eshconfig is used to configure device-specific parameters and download new firmware to the Essential Communications RoadRunner-based HIPPI
     network interface.  The interface is very sensitive to the DMA performance characteristics of the host, and so requires careful tuning to
     achieve reasonable performance.  In addition, firmware is likely to change frequently, which necessitates a reasonably easy way to update
     that firmware.

     Available operands for eshconfig:

     -b bytes
	     Adjust the burst size for read (by NIC of host memory) DMA.

     -c bytes
	     Adjust the burst size for write (by NIC of host memory) DMA.

     -d filename
	     Filename for file to download into NIC firmware.  This must be a file in the standard Essential format, with :04 preceding every
	     line, and a tag line at the end indicating the characteristics of the firmware file.

     -e      Write data to EEPROM.  Normally, setting tuning parameters will only persist until the system is rebooted.  Setting this parameter
	     ensures that the changes will be written to EEPROM.

     -i usecs
	     Interrupt delay in microseconds.

     -m bytes
	     Minimum number of bytes to DMA in one direction (read or write) before allowing a DMA in the other direction.  Tuning this prevents
	     one direction from dominating the flow of bytes, and artificially throttling the NIC.

     -r bytes
	     Bytes before DMA starts for read (from host to NIC).  This controls how soon the DMA is triggered;  until this many bytes are
	     requested, the DMA will not begin.

     -s      Show statistics for the HIPPI NIC.  Repeat the option to suppress non-zero statistics.

     -t      Show current tuning parameters on the host.

     -u filename
	     Name of file to which the NIC firmware should be uploaded.  Not currently supported.

     -w bytes
	     Number of bytes required before write (from NIC to host) DMA is started.  Until this many bytes are ready to be written, the DMA will
	     not start.

     -x      Reset the NIC.  This is necessary for the HIPPI-FP support, as ifconfig(8) will no longer physically reset the NIC when the inter-
	     faces goes up and down.

     Only the super-user may modify the configuration of a network interface.

DIAGNOSTICS

     Messages indicating the specified interface does not exist or the user is not privileged and tried to alter an interface's configuration.

SEE ALSO

     esh(4), ifconfig(8)

HISTORY

     The eshconfig command first appeared in NetBSD 1.4.

BSD
								   June 17, 2005							       BSD