kern/51970: Adaptec AIC-7902 with HostRAID option enabled fails to be probed

[Seva Gluschenko]

>Number:         51970
>Category:       kern
>Synopsis:       Adaptec AIC-7902 with HostRAID option enabled fails to be probed
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu May 08 06:50:08 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Seva Gluschenko
>Release:        FreeBSD 4.8-RC i386
>Organization:
JSC Demos-Internet
>Environment:
System: FreeBSD road.demos.su 4.8-RC FreeBSD 4.8-RC #2: Tue Mar 4 15:43:13 MSK 2003 gvs at road.demos.su:/usr/local/obj/usr/local/src/sys/ROAD i386


	
>Description:
	When booting with FreeBSD installation CD on ServerWorks machine with
	AIC-7902 SCSI controller on-board with HostRAID option is turned on,
	the controller fails to be detected by FreeBSD driver and is reported
	as unknown device.
>How-To-Repeat:
	Configure your Adaptec SCSI Controller to enable HostRAID option and
	try booting FreeBSD on that. Obviously, you'll fail.
>Fix:

	In /usr/src/sys/dev/aic7xxx/aic79xx_pci.c, line 69:

	#define ID_9005_GENERIC_MASK	0xFFF0FFFF00000000ull

	this line breaks successful AIC-7902 detection with HostRAID option
	turned on because it reports itself as another device ID (809F vs.
	801F with disabled HostRAID). So change the mask to be
	0xFF70FFFF00000000ull (don't care about the specified bit) and thus
	the detection problem is solved.

	BEWARE: while our HostRAID has been configured for mirroring, both
	disks were seen by FreeBSD (da0 and da1), so maybe different
	communication method should be used. I failed to find any contact
	addresses of driver developer from Adaptec, so I can't verify that.

>Release-Note:
>Audit-Trail:
>Unformatted: