Hi Alexey,
On Wednesday, 11 July 2018 7:45:10 PM AEST Alexey Kardashevskiy wrote:
> On Thu, 7 Jun 2018 17:06:07 +1000
> Alexey Kardashevskiy <a...@ozlabs.ru> wrote:
>
> > This brings NPU2 in a safe mode when it does not throw HMI if GPU
> > coherent memory is gone.
It might be helpful if you you could describe the problem and what you are
trying to solve in a bit more depth. Assuming the memory was online how are you
offlining it? If the memory has been online merely fencing/hot-resetting the
NVLink is likely not sufficient as you also need to flush caches prior to taking
the links down.
- Alistair
> > Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
>
>
> Anyone, ping?
>
>
> > ---
> >
> > The main aim for this is nvlink2 pass through, helps a lot.
> >
> >
> > ---
> > arch/powerpc/platforms/powernv/pci-ioda.c | 11 +++++++++++
> > 1 file changed, 11 insertions(+)
> >
> > diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c
> > b/arch/powerpc/platforms/powernv/pci-ioda.c
> > index 66c2804..29f798c 100644
> > --- a/arch/powerpc/platforms/powernv/pci-ioda.c
> > +++ b/arch/powerpc/platforms/powernv/pci-ioda.c
> > @@ -3797,6 +3797,16 @@ static void pnv_pci_release_device(struct pci_dev
> > *pdev)
> > pnv_ioda_release_pe(pe);
> > }
> >
> > +void pnv_npu_disable_device(struct pci_dev *pdev)
> > +{
> > + struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
> > + struct eeh_pe *eehpe = edev ? edev->pe : NULL;
> > +
> > + if (eehpe && eeh_ops && eeh_ops->reset) {
> > + eeh_ops->reset(eehpe, EEH_RESET_HOT);
> > + }
> > +}
> > +
> > static void pnv_pci_ioda_shutdown(struct pci_controller *hose)
> > {
> > struct pnv_phb *phb = hose->private_data;
> > @@ -3841,6 +3851,7 @@ static const struct pci_controller_ops
> > pnv_npu_ioda_controller_ops = {
> > .reset_secondary_bus = pnv_pci_reset_secondary_bus,
> > .dma_set_mask = pnv_npu_dma_set_mask,
> > .shutdown = pnv_pci_ioda_shutdown,
> > + .disable_device = pnv_npu_disable_device,
> > };
> >
> > static const struct pci_controller_ops pnv_npu_ocapi_ioda_controller_ops =
> > {
>
>
>
> --
> Alexey
>
