Commit Graph

6 Commits

Author SHA1 Message Date
jdolecek 67238c609c The header part of driver overhault:
* simplify and clean the attach code a lot, and support the 'drive'
  locator
* pass proper dev_t to readdisklabel() - formerly, the passed value was
  completely broken (used incorrect major and wrong minor), but worked
  by accident
* worker thread is now spawned per controller, rather than per-drive;
  i/o cannot be done concurrently by different drivers, only one
  i/o can be pending at any time
* simplify the command queue code, just sleep appropriately when
  !poll case, g/c 'async' code formerly needed, move the bio code
  from ed_mca.c to edc_mca.c:edc_bio()
* other misc cleanups
2001-11-24 12:46:15 +00:00
wiz cc0b68092e Correct various misspellings of 'transfer' and inflected forms. 2001-07-08 18:06:42 +00:00
jdolecek 5b3932d176 Implement polled command mode, and use it for writing system dump
and for initial autoconf probes; the latter eliminates need for
deferred configuration (and makes dmesg a bit nicer).

g/c EDF_IODONE flag - protect against interrupt by calling tsleep()
at splbio in worker thread

g/c unneeded stuff, improve some autoconf messages
2001-05-04 12:58:34 +00:00
jdolecek 8927d6f1be Fix serious bug in bounce buf handling - the EDF_BOUNCEBUF flag needs
to be cleared always in edmcadone(), otherwise if there is a write
via bounce buffer followed by read directly to buf, the read operation
would return trashed data (the buf data would get overwritten
by contents of bounce buffer in edmcadone()).
Reset b_resid as necessary when the i/o is done, too.

g/c some unneeded stuff, use lockmgr()-style locking in ed_[un]lock(),
better avoid some deadlocks

These changes make the driver quite a bit more stable. It's actually
reliable enough to be possible to newfs the drive and use it for
read/write filesystem now.
2001-04-22 11:32:49 +00:00
jdolecek dbf91c827d Use "edc" instead of "dasd". As pointed out by Soren, dasd doesn't
mean anything special in IBM-talk. And edc better matches prior art, too.
2001-04-19 17:17:28 +00:00
jdolecek fd1d702ab7 Add a driver for IBM ESDI disk controllers. Tested with IBM Integ. ESDI Fixed
Disk & Controller only at the moment.

This driver still needs some touchup (error recovery is not quite
good, MCA DMA controller goo should be moved to driver independant
location), but is working enough to be usable for others. And I
want this under CVS control :)

Thanks to Scott Telford <st@epcc.ed.ac.uk> for providing me docs for
these devices (IBM DASD Storage Interface Specification for MCA rev. 2.2).
2001-04-19 07:30:24 +00:00