Date: Wed, 05 Feb 1997 15:44:31 -0800 (PST) From: Simon Shapiro <Shimon@i-Connect.Net> To: freebsd-scsi@freebsd.org Subject: RE: Some SCSI Questions... Message-ID: <XFMail.970205155418.Shimon@i-Connect.Net>
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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
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