glm(7D)
NAME
glm − GLM SCSI Host Bus Adapter Driver
SYNOPSIS
glm@bus-type
AVAILABILITY
Limited to PCI-based systems with Symbios 53c875 SCSI I/O processors.
DESCRIPTION
The glm Host Bus Adapter driver is a SCSA compliant nexus driver that supports the Symbios 53c875 SCSI chip.
It supports the standard functions provided by the SCSA interface, that is, it supports wide and fast SCSI, but does not support linked commands.
Driver Configuration
Configure the glm driver by defining properties in glm.conf. These properties override the global SCSI settings. glm supports these properties: scsi-options, target<n>-scsi-options, target<n>-sync-speed, target<n>-wide, target<n>-TQ, scsi-reset-delay, scsi-watchdog-tick, and scsi-initiator-id.
target<n>-scsi-options overrides the scsi-options property value for target<n>. <n> can vary from hex 0 to F. glm supports these scsi-options: SCSI_OPTIONS_DR, SCSI_OPTIONS_SYNC, SCSI_OPTIONS_FAST, SCSI_OPTIONS_WIDE, and SCSI_OPTIONS_FAST20.
During the periodic interval scsi-watchdog-tick, glm searches through all current and disconnected commands for timeouts.
EXAMPLES
Create a file /kernel/drv/glm.conf and add the following line:
scsi-options=0x78;
This will disable fast SCSI and wide mode for all glm instances. To disable an option for one specific glm, see driver.conf(4).
Note that the default initiator ID in OBP is 7 and that the change to ID 6 will occur at attach time. It may be preferable to change the initiator ID in OBP.
FILES
/kernel/drv/glm ELF Kernel Module
/kernel/drv/glm.conf
Optional configuration file
SEE ALSO
prtconf(1M), driver.conf(4), scsi_abort(9F), scsi_hba_attach(9F), scsi_ifgetcap(9F), scsi_ifsetcap(9F), scsi_reset(9F), scsi_sync_pkt(9F), scsi_transport(9F), scsi_device(9S), scsi_extended_sense(9S), scsi_inquiry(9S), scsi_pkt(9S),
Writing Device Drivers
ANSI Small Computer System Interface-2 (SCSI-2),
Symbios Logic Inc., SYM53c875 PCI-SCSI I/O Processor With Fast-20
NOTES
The glm hardware (53C875) supports both wide and fast SCSI mode. The maximum SCSI bandwidth is 20 MB/sec.
SunOS 5.5.1 — Last change: 13 Sep 1995