14 Commits

Author SHA1 Message Date
gibbs
feab573385 Add tagged queueing support. Right now, we only allow two tagged
commands per target.  I could have followed the route of the ncr driver
and gone to great lengths to get the SCSI subsystem to support more, but
I think I'll use the time saved to help Julian and Peter make tagged
queuing a better handled generic feature.  This also includes some comment
and enum clean up and a possible fix for the hanging PCI controllers.
1995-02-22 01:43:25 +00:00
gibbs
c1786c1d98 Keep track of when we actually are awaiting a reply to an SDTR or WDTR
message instead of relying on the fact that we are scheduled to send them.
The old method worked 99.9% of the time, but someone reported some periferals
that did MSG_REJECT at odd times (sometimes before we could send an SDTR
or WDTR) that we would construe as the response to an SDTR or WDTR message.
This also removes a possible race condition where after a bus reset (the
result of a command time out not during intial probe time), we might queue
two commands both requesting SDTR, WDTR or both.
1995-02-03 17:15:12 +00:00
gibbs
630d398130 Set the current transfer parameters directly after a mesg reject for either
Wide or Sync negotiation attempts as we do in all other phases of negotiation.
1995-01-27 17:37:05 +00:00
gibbs
8e92a2f20c Initialize SIMODE1, SCSIID, and SXFRCTL1 in ahc_init instead of at each
reconnection/selection with a target.
1995-01-22 00:48:39 +00:00
gibbs
cd232c506d Add $Ids. Use DMA for downloading SCBs to the sequencer. Implement SDTR,
WDTR, and message reject handlers so they don't need to exist in the
sequencer.  All three of these cases are not on the critical path, so it
makes little sense to use up precious sequencer ram for them.
1995-01-16 16:33:47 +00:00
gibbs
7f7c56c327 Point include to i386/scsi 1995-01-13 02:27:08 +00:00
gibbs
7052076816 Generic support for the entire aic7x70 line of adaptors. No one else
came up with a directory place ment more me, so now we have i386/scsi.
1995-01-13 02:24:31 +00:00
gibbs
52abe9ec49 Handle both channels of Twin channeled devices. Respect the configuration
values for syncronous negotiation.  The 284x series adaptors can now be
supported without the Bios being enabled.  If you disable the Bios on the
274x series adaptors, all configuration parameters revert to the default
since there is no way to retrieve them.
1994-12-31 19:31:56 +00:00
gibbs
b6942ab081 Put the sequencer into FASTMODE during initialization. I can now
get up to 8m/sec write performance out of a pd2100 with this driver.
1994-11-29 23:06:54 +00:00
ats
d33db1bec6 Changed the MAX_SLOTS constant from 8 to 16. The EISA bus can have up
to 16 slots.
1994-11-25 22:25:15 +00:00
gibbs
ea0a6a1c28 Register with devconfg so we show up in lsdev. 1994-11-18 20:34:30 +00:00
gibbs
7178816b0f Change the include for the sequencer program to point back to the
right place:

include "../../sys/gnu/misc/aic7770/aic7770_seq.h"
1994-11-18 09:14:14 +00:00
jkh
d972449378 Whoops - this one's my fault. Put back my changes for seqprog[]. 1994-11-18 09:03:09 +00:00
gibbs
ead58c9f62 My port of Julian's 1742 driver to work with the Linux aic7770 sequencer
code.
1994-11-17 20:22:31 +00:00