On 04/16/2018 11:26 AM, Christian T. Steigies wrote:
On Thu, Apr 12, 2018 at 01:53:26PM +1200, Michael Schmitz wrote:
From: Michael Schmitz <schmitz@xxxxxxxxxx>
New combined SCSI driver for all ESP based Zorro SCSI boards for
m68k Amiga.
Code largely based on board specific parts of the old drivers (blz1230.c,
blz2060.c, cyberstorm.c, cyberstormII.c, fastlane.c which were removed
after the 2.6 kernel series for lack of maintenance) with contributions
by Tuomas Vainikka (TCQ bug tests and workaround) and Finn Thain (TCQ
bugfix by use of PIO in extended message in transfer).
New Kconfig option and Makefile entries for new Amiga Zorro ESP SCSI
driver included in this patch.
Use DMA transfers wherever possible, with board-specific DMA set-up
functions copied from the old driver code. Three byte reselection messages
do appear to cause DMA timeouts. So wire up a PIO transfer routine for
these instead. esp_reselect_with_tag explicitly sets esp->cmd_block_dma as
target address for the message bytes but PIO requires a virtual address.
Substiute kernel virtual address esp->cmd_block in PIO transfer call if
DMA address is esp->cmd_block_dma and phase is message in.
PIO code taken from mac_esp.c where the reselection timeout issue was
debugged and fixed first, with minor macro and function rename.
Signed-off-by: Michael Schmitz <schmitzmic@xxxxxxxxx>
Reviewed-by: Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Tested-by: Christian T. Steigies <cts@xxxxxxxxxx>
Also here on an Amiga 4000 with Cyberstorm I:
Tested-by: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@xxxxxxxxxx
`. `' Freie Universitaet Berlin - glaubitz@xxxxxxxxxxxxxxxxxxx
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
