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by dealing with various error conditions.
Testing by Marco Peereboom, Olivier Cherrier, Alex Holst, Daniel Lucq,
deraadt@, beck@ and others.
ok deraadt@.
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Renauld of Network Storage Solutions, Inc. Many fixes, wider device
support. In particular, the notorious 'Target 0' problem seems to be
fixed.
Does *not* include any updates to isa or eisa code beyond what was
necessary to compile.
Known issues:
1) Tagged Queuing is probably not optimal.
2) PPR negotiation may not be fully functional.
3) No support yet for freezing devices or channels.
4) The mechanism for preventing 'A' and 'B' channel confusion during probe
can fail if scsibus > 254 found.
5) Requeuing I/O's not working. A workaround will be committed almost
immediately. At the moment timeouts, SCSI message rejects, aborting
SCB's and trying to freeze a device may cause incomplete i/o's to be
reported as complete.
6) Verbosity and probe messages need work.
7) Last disk on bus seems to go through an extra re-negotiation.
8) >16 devices on an adapter will trigger the usual problems of total
openings exceeding available SCB's under heavy load.
Tested by deraadt@, beck@, miod@, naddy@, drahn@, marc@ amoung
others.
ok deraadt@.
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scsiconf.c. The fact that both this ('original') ahc driver and the
new ahc driver (since reverted) crashed if devices capable of tagged
queuing were not correctly flagged as such must be a clue to some
interesting problem.
a) Restore marking of appropriate devices as tagged.
b) Use TAG_ENB define instead of MSG_SIMPLE_Q_TAG when
manipulating hscb->control. Both were defined to the
same value, but TAG_ENB is the define used to extract
the bit later on.
c) Delete unused field 'tagdisable'.
ok millert@, also tested by naddy@
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Fix for drives with Tag quirks.
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two months of work.
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by gibbs@freebsd.org
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NetBSD 961107 state. Other has not, partly because sometimes the bus.h
changes was coupled with other changes.
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pete@demon.net
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