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unsigned. should fix xdc watchdog timeouts noted in port-sparc
by nathanw@mit.edu.
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NS,IPX,X.25 special processing is now handled in there.
reflect this amazing addition in all the ether ifaces.
ppl, pls check the stuff.
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[1] check return value from malloc() for NULL before trying to bzero it.
[2] use "=" rather than "|=" when writing to CSR (otherwise you may
ACK something you don't mean to!).
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minor clean up: revise locations of disk_busy/disk_unbusy calls to match xd.c
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[prevents disk_unbusy panic when disk is loaded (if no
free IOPBs, xdstrategy() would queue the buffer for pickup
by xdcintr() but xdcintr() would never call disk_busy().
xdc_startbuf() is a better place since all bufs are routed
through here] problem detected by girish@dworkin.wustl.edu,
diagnosed and corrected by me.
- move disk_unbusy() call in xdc_remove_iorq() before the call to
XDC_FREE() [don't want to access a data structure that was just put
on a free list]
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- move disk_attach() to before reading the disk label as per Jason.
otherwise we are reading into an unallocated buffer (oops!)
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New generic disk framework. Highlights:
New metrics handling. Metrics are now kept in the new `struct disk'.
Busy time is now stored as a timeval, and transfer count in bytes.
Storage for disklabels is now dynamically allocated, so that the size
of the disk structure is not machine-dependent.
Several new functions for attaching and detaching disks, and handling
metrics calculation.
Old-style instrumentation is still supported in drivers that did it
before. However, old-style instrumentation is being deprecated, and
will go away once the userland utilities are updated for the new
framework.
For usage and architectural details, see the forthcoming disk(9)
manual page.
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Change splimp -> splnet in Ethernet, ARCnet, and FDDI drivers.
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Latest, greatest version of the new NCR driver.
DMA works! Interrupts work! Disconnect/reselect works!
To be paranoid, leave that all disabled for now...
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New SCSI driver for the NCR5380, by David Jones.
Does DMA with interrupts. Much faster than our old
driver which did only PIO transfers. (Thanks David!)
Could be used on the amiga, and probably others...
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