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SCSI/ATAPI detach is not here yet.
Minor cleanup of wdc. Downgrade to UDMA mode 1 before going further.
Want to stay in UDMA modes because they're more error-resilient due to
a CRC.
Got rid of some of the ridiculous amount of softc sharing going on.
Hopefully, this will make the life of whoever goes in and fixes the
ref-counting to be correct easier.
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driver (pciide, wdc, etc.)
Remove #define WDCDEBUG from top of files
More fixes to ATAPISCSI logic:
Not all devices transition correctly between phases. Devices are supposed
to keep BSY high until they've set the registers to the next sensible
state. Some devices drop BSY and leave the registers in an old or
nonsense state. Our polling code is extremely sensitive to this
(though an early itnerrupt could also observe this). So, if the device is
in an unexpected state, the new polling code waits for a while in the hope
that it enters a better state.
This seems to fix many of the problems reported.
Also, there was a horrible bug which would cause sense to fail on a ATAPI
command that sent data to the drive
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from bouyer:
- Add some debug printf (WDCPROBE) in _wdcreset_wait(), I've needed these
2 times in the past
- Set up timeout per xfer instead of per interrupt. This helps with
PIO transfer (we would call timeout()/untimout() several times for a
transfer).
- If we missed an interrupt for a PIO transfer, reset and restart it
immedialy, don't try to recover and continue. If we missed an interrupt we
may have lost a read/write cycle on the IDE bus. If this happens 1) we
corrupt data and 2) we enter an interrupt loop at the end of the xfer, as
the drive has some more data to read/write, but the host thinks the xfer is
done.
This last change fix the (or at last some of the) 'lookup after lost interrupt'
some peoples have been experiencing.
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Introduction of home-grown
To enable this stuff in your configuration, look at the NEWATA conf file
and go through
dev/isa/files.isa
dev/pci/files.pci
conf/files
arch/i386/conf/files.i386
and follow the instructions on commenting/uncommenting stuff
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