On Thu, Apr 12, 2018 at 01:53:26PM +1200, Michael Schmitz wrote:
> From: Michael Schmitz <schm...@debian.org>
> 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 <schmitz...@gmail.com>
> Reviewed-by: Finn Thain <fth...@telegraphics.com.au>
> Reviewed-by: Christoph Hellwig <h...@lst.de>
Tested-by: Christian T. Steigies <c...@debian.org>


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