Re: [PATCH 1/1] PCI: Add pci reset quirk for Nvidia GPUs

[Alex Williamson]

On Mon, 26 Apr 2021 19:19:43 +0100
Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:

> On Fri, Apr 23, 2021 at 04:45:15PM -0500, Shanker R Donthineni wrote:
> > > specific platforms (embedded device?), and the failure mode of the SBR.  
> > These are not plug-in PCIe GPU cards, will exist on upcoming
> > server baseboards. Triggering SBR without firmware notification  
> 
> Please submit the quirks together with the actual support for the GPUs
> in the nouveau driver, as they are completely useless without that.

My default assumption would be that this resolves an issue with
assigning this device to a userspace or VM driver through vfio-pci, as
most in-kernel drivers don't make use of this interface themselves;
they often know more device specific ways to re-initialize hardware.
This reset path is also trivially accessible through pci-sysfs.  I
don't expect nouveau would have much use for this even if it did
include support for these devices.  Thanks,

Alex