Re: SCSI QLA not working on latest *-mm SN2

Andrew Vasquez
2004-09-18T01:28:48Z

On Fri, 2004-09-17 at 18:25, Matthew Wilcox wrote:
> On Fri, Sep 17, 2004 at 06:15:10PM -0700, Andrew Vasquez wrote:
> > On Fri, 17 Sep 2004, James Bottomley wrote:
> > > Just to confirm if we absolutely have to do this...the offending reads
> > > to issue the posting flush were to the register you just wrote to to get
> > > the chip to reset. However, any MMIO read to any region of that card
> > > would also trigger a posted write flush. Does the chip drop entirely
> > > off the PCI bus during the execution of reset, or could we perhaps issue
> > > an innocuous read to somewhere in PCI configuration space for the card?
> >
> > I had asked the hardware guy a similar question -- for the soft-reset
> > operation, we'll _not_ be able to issue additional readw()s until '16
> > PCI clocks elapse.' So, it seems we'll have to settle with the
> > udelay() in this particular instance.
>
> But the write that starts the reset can be delayed arbitrarily, so we need
> to do *some* kind of read from the device to be know that it got there.
> Can we access config space instead of mmio space?

I'll have an answer to that question on Monday -- most, if not everyone
here has left for the weekend.

--
andrew