SCSI Driver Initialization

SCSI Driver Initialization

A SCSI driver can be included in the kernel through a VECTOR, INCLUDE, or USE line in the system file in /var/sysgen/system (see "Configuring a Kernel"). When included through a VECTOR line, the pfxedtinit() entry point is called for each VECTOR line given. The VECTOR can describe a logical unit or a control unit, according to your design choice. However, a VECTOR line for a high-level SCSI driver can not include a probe or exprobe operand, because the hardware is owned by the host adapter driver, not by the SCSI device driver.

When included through a USE line, a SCSI driver is initialized at its pfxinit() entry point. In this case, the driver must obtain the adapter number by some other means. (See "Initialization Entry Points".)