> Date: Sun, 25 Jul 2021 12:08:09 +0100
> From: Stuart Henderson <[email protected]>
> 
> On 2021/07/25 14:55, Jonathan Matthew wrote:
> > On Thu, Jul 22, 2021 at 10:45:17PM -0400, Ashton Fagg wrote:
> > > I have two devices here based on the JMicron JMB585 chipset. This diff
> > > adds the required pcidev IDs and sets disables native command queuing in
> > > the driver. FreeBSD does something similar for this device:
> > > 
> > > https://github.com/freebsd/freebsd-src/commit/16b766eed443043f4216d50e40ba283e74f992c2
> > 
> > Can you explain how you came to the conclusion that you'd need to
> > disable NCQ?  The FreeBSD commit you link to doesn't appear to do that
> > as they're not applying the AHCI_Q_NONCQ flag to these devices.
> > Does it not work with NCQ enabled?
> > 
> 
> That FreeBSD commit prevents using their "hw.ahci.force" tunable on the
> device, it's used for attaching as AHCI to certain known chips even if
> they're set in legacy IDE mode.
> 
> Does it work to just add the vid/pid to the ahci_devices[] array
> without a specific attach function? (like PCI_PRODUCT_ASMEDIA_ASM1061_SATA).

Hmm, that suggests that the right fix might actually be to add
pciide(4) on riscv64.

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