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Date: Wed, 05 Feb 1997 15:44:31 -0800 (PST)
Organization: iConnect Corp.
From: Simon Shapiro <Shimon@i-Connect.Net>
To: freebsd-scsi@freebsd.org
Subject: RE: Some SCSI Questions...
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Hi Y'all,

Me again, with more questions:

1.  I want to port cdwrite 2.0 from Linux (and get rid but have no clue
    what the userland API to the generic device (userland SCB) is. 
    Can someone
    please help me with:

    a.  What is the /dev entry?
    b.  What options in config do I need to turn on?
    c.  (At least) header file pathname to API

2.  In writing a SCSI device driver, how does one differentiate a device
    reset from bus reset from HBA reset?  I can guess, that an HBA reset
    may come as a device reset flag in the xs struct, destined for the
    HBA's target ID.  But on which bus?  Based on the Unit number?

    We have an HBA which has three busses.  We can have multiple of these
    HBA's in the system.  We set the HBA softc struct as an array (linked
    list, actually) of softc structures.  In each softc we have an array
    of scsi_link structures to manage that.  But question #2 is not
    answered by that, to my understanding.

    In other words;  We need to differentiate (in the case of an HBA
    reset) between resetting the HBA itself, resetting any given bus
    attached to the HBA and resetting a device attached.  If the HBA does
    target mode, we could argue, that the device reset, applies to the
    HBA as a target, not to the HBA as a controller.  Right?

Thanx!

Simon