[PATCH] nvme: prepare support for Apple NVMe controller

Keith Busch keith.busch at intel.com
Thu Oct 29 13:31:15 PDT 2015

On Thu, Oct 29, 2015 at 08:46:38PM +0100, Stephan Günther wrote:
> On 2015/October/29 09:10, Jon Derrick wrote:
> > Christoph recently added a quirks mechanism where I think it would fit
> To be honest we don't know what mechanism you are referring to. Please 
> give us pointer.

It's new, not merged in an official tree. A copy is on the mailing list
somewhere. I committed it to my personal tree here:

> I assume that we concur that this workaround--as well as making the nvme 
> driver claim the Apple controller--should be a runtime-decisions based 
> on the device id. That avoids both penalties in terms of cpu cycles and 
> the tedious manual binding.

Just append the Vendor + Device to struct pci_device_id nvme_id_table
if the 64 bit register access really is the only problem preventing it
from working in an NVMe compliant way. You can check at run time for
the lo_hi_[read/write]q quirk.

If it really works with only this one change to the nvme driver, I also
wonder Apple typo'ed their class code.

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