Re: qla1280 driver for qlogic-1040 on alpha

["Martin K. Petersen" <martin.petersen@oracle.com>]

Hi Magnus!

> I've been running linux on alpha (alphaserver es40) for a while, using
> a qlogic-1040 scsi controller. A few weeks ago I added more RAM to the
> es40, but as soon as I got above 2GB RAM I started seeing file system
> corruptions on the drive attached to the qlogic controller.

The qla1280 driver has been used extensively on 64-bit platforms.

Is your isp1040 original to the ES40? My Alphas used 53c8xx series
controllers if I remember correctly. And with the ES40 being fairly
recent (21264), I would have thought it would have used a slightly more
modern controller than a 1040.

> The nvram flag "enable_64bit_addressing" on the qlogic board is not
> checked nor set by the driver.

That would be a good place to start. Maybe if you could dump the NVRAM
contents and validate if that is set by the 1040 firmware? I'm afraid I
don't have a databook. But the 1040 was current right around the time
the industry transitioned from 32 to 64-bit so it could very well be
broken.

If you can establish whether that flag is unset on your controller,
we could use that as a heuristic for configuring DMA.

-- 
Martin K. Petersen	Oracle Linux Engineering