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Salyzyn, Mark 9d399cc7fe [SCSI] aacraid: add support for FUA ... Back in the beginning of last year we disabled mode page 8 and mode page 3f requests through device quirk bits instead of enhancing the driver to respond to these mode pages because there was no apparent added value. The Firmware that supports the new communication commands supports the ability to force a write around of the adapter cache on a command by command basis. In the attached patch we enable mode page 8 and 3f and spoof the results as needed in order to *convince* the layers above to submit writes with the FUA (Force Unit Attention) bit set if the file system or application requires it, if the Firmware supports the write through, or instead to submit a SYNCHRONIZE_CACHE if the Firmware does not. The added value here is for file systems that benefit from this functionality and for clustering or redundancy scenarios. Caveats: By convince, we are responding with a minimal short 3 byte content mode page 8, with only the data the SCSI layer needs and that we can fill confidently. Applications that require the customarily larger mode page 8 results may be confused by this(?). The FUA, or the SYNCHRONIZE_CACHE only affect the cache on the controller. Our firmware by default ensure that the underlying physical drives of the array have their cache turned off so normally this is not a problem. This attached patch is against current scsi-misc-2.6 and was unit tested on RHEL5. Since this is a feature enhancement, it should not be considered for any current stabilization efforts. Signed-off-by: Mark Salyzyn <aacraid@adaptec.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>		18 years ago
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Makefile	[SCSI] aacraid: Begin adding support for new adapter type	18 years ago
TODO	…
aachba.c	[SCSI] aacraid: add support for FUA	18 years ago
aacraid.h	[SCSI] aacraid: add support for FUA	18 years ago
commctrl.c	[SCSI] aacraid: resolve compiler warnings using ptrdiff_t	18 years ago
comminit.c	[SCSI] aacraid: kmalloc/memset->kzalloc	18 years ago
commsup.c	[SCSI] aacraid: kmalloc/memset->kzalloc	18 years ago
dpcsup.c	[SCSI] aacraid: kmalloc/memset->kzalloc	18 years ago
linit.c	[SCSI] aacraid: add support for FUA	18 years ago
nark.c	[SCSI] aacraid: cleanups	18 years ago
rkt.c	[SCSI] aacraid: cleanups	18 years ago
rx.c	[SCSI] aacraid: superfluous adapter reset for IBM 8 series ServeRAID controllers	18 years ago
sa.c	PCI: Cleanup the includes of <linux/pci.h>	18 years ago