* changes to drivers/scsi/sym53c8xx_defs.h in the mips tree
@ 2005-01-29 16:37 Christoph Hellwig
2005-01-30 1:18 ` Maciej W. Rozycki
0 siblings, 1 reply; 3+ messages in thread
From: Christoph Hellwig @ 2005-01-29 16:37 UTC (permalink / raw)
To: carstenl; +Cc: linux-mips
Hi Carsten,
do you remember what your changes to drivers/scsi/sym53c8xx_defs.h in
the mips tree are supposed to help with?
sym53c8xx_defs.h is only used for the ncr53c8xx driver, which despite
the name is only for NCR53c720 chips these days (supported on parisc,
and eisa/mca). It has correct big endian support for parisc alrady.
Also the patch duplicates your changelog and copyright entry that's
in the file already.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: changes to drivers/scsi/sym53c8xx_defs.h in the mips tree
2005-01-29 16:37 changes to drivers/scsi/sym53c8xx_defs.h in the mips tree Christoph Hellwig
@ 2005-01-30 1:18 ` Maciej W. Rozycki
2005-01-30 10:59 ` Christoph Hellwig
0 siblings, 1 reply; 3+ messages in thread
From: Maciej W. Rozycki @ 2005-01-30 1:18 UTC (permalink / raw)
To: Christoph Hellwig; +Cc: linux-mips
On Sat, 29 Jan 2005, Christoph Hellwig wrote:
> Hi Carsten,
I'm afraid Carsten may no longer be reachable, but I may try to help in
his stead.
> do you remember what your changes to drivers/scsi/sym53c8xx_defs.h in
> the mips tree are supposed to help with?
It must have been the MIPS Technologies' Atlas development board which
has a SYM53C810A incorporated, even though the resulting changes are
specific to the board. There appears to have been some sort of confusion
about the semantics of i/o and mmio operations in mixed-endian
configurations, which for the MIPS port actually is currently being
resolved.
> sym53c8xx_defs.h is only used for the ncr53c8xx driver, which despite
> the name is only for NCR53c720 chips these days (supported on parisc,
> and eisa/mca). It has correct big endian support for parisc alrady.
I can verify whether the other driver operates correctly in the four
possible configurations with an Atlas board.
BTW, that SCSI_NCR_BIG_ENDIAN macro looks scary -- is the chip wired
incorrectly (i.e. with byte lanes swapped at PCI) or are i/o and/or mmio
operations simply broken for parisc?
> Also the patch duplicates your changelog and copyright entry that's
> in the file already.
It looks like some sort of a merging mistake.
Maciej
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: changes to drivers/scsi/sym53c8xx_defs.h in the mips tree
2005-01-30 1:18 ` Maciej W. Rozycki
@ 2005-01-30 10:59 ` Christoph Hellwig
0 siblings, 0 replies; 3+ messages in thread
From: Christoph Hellwig @ 2005-01-30 10:59 UTC (permalink / raw)
To: Maciej W. Rozycki; +Cc: linux-mips
On Sun, Jan 30, 2005 at 01:18:52AM +0000, Maciej W. Rozycki wrote:
> BTW, that SCSI_NCR_BIG_ENDIAN macro looks scary -- is the chip wired
> incorrectly (i.e. with byte lanes swapped at PCI) or are i/o and/or mmio
> operations simply broken for parisc?
Many parisc systems have a NCR720 on the HP GSC bus, which actually
is accessed as big endian.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2005-01-29 16:37 changes to drivers/scsi/sym53c8xx_defs.h in the mips tree Christoph Hellwig
2005-01-30 1:18 ` Maciej W. Rozycki
2005-01-30 10:59 ` Christoph Hellwig
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