On Fri, Aug 16, 2024 at 11:59:08AM +0200, Mark Kettenis wrote:
> > Date: Fri, 16 Aug 2024 15:21:17 +1000
> > From: Jonathan Gray <[email protected]>
> >
> > On Thu, Aug 15, 2024 at 11:04:32PM -0600, Theo de Raadt wrote:
> > > I'm no sure we should call it "BROKEN SUSPEND".
> > > It suspends, in our way. It just has a bug in CRS for RESUME.
> > >
> > > So maybe BROKEN_CRS?
> >
> > NOCRS?
>
> I wonder if we should also skip saving the state in that case. The
> Linux code also has seem workarounds for that. In that case the name
> of the flag should probably be XHCI_NOCSS.
we can also skip restore by not setting sc_saved_state
Index: sys/dev/usb/xhci.c
===================================================================
RCS file: /cvs/src/sys/dev/usb/xhci.c,v
diff -u -p -r1.133 xhci.c
--- sys/dev/usb/xhci.c 15 Aug 2024 17:17:05 -0000 1.133
+++ sys/dev/usb/xhci.c 16 Aug 2024 10:53:27 -0000
@@ -620,6 +620,8 @@ xhci_suspend(struct xhci_softc *sc)
return;
}
+ if (sc->sc_flags & XHCI_NOCCS)
+ goto noccs;
/*
* Some Intel controllers will not power down completely
* unless they have seen a save state command. This in turn
@@ -643,6 +645,7 @@ xhci_suspend(struct xhci_softc *sc)
}
sc->sc_saved_state = 1;
+noccs:
/* Disable interrupts. */
XRWRITE4(sc, XHCI_IMOD(0), 0);
Index: sys/dev/usb/xhcivar.h
===================================================================
RCS file: /cvs/src/sys/dev/usb/xhcivar.h,v
diff -u -p -r1.15 xhcivar.h
--- sys/dev/usb/xhcivar.h 15 Aug 2024 17:17:05 -0000 1.15
+++ sys/dev/usb/xhcivar.h 16 Aug 2024 10:52:11 -0000
@@ -121,6 +121,9 @@ struct xhci_softc {
char sc_vendor[16]; /* Vendor string for root hub */
int sc_id_vendor; /* Vendor ID for root hub */
+
+ int sc_flags;
+#define XHCI_NOCCS 0x01
};
int xhci_init(struct xhci_softc *);
Index: sys/dev/pci/xhci_pci.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/xhci_pci.c,v
diff -u -p -r1.13 xhci_pci.c
--- sys/dev/pci/xhci_pci.c 24 May 2024 06:02:58 -0000 1.13
+++ sys/dev/pci/xhci_pci.c 16 Aug 2024 10:53:39 -0000
@@ -150,6 +164,11 @@ xhci_pci_attach(struct device *parent, s
if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_FRESCO_FL1000 ||
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_FRESCO_FL1400)
pa->pa_flags &= ~PCI_FLAGS_MSI_ENABLED;
+ break;
+ case PCI_VENDOR_AMD:
+ if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_17_1X_XHCI_1 ||
+ PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_17_1X_XHCI_2)
+ psc->sc.sc_flags |= XHCI_NOCCS;
break;
}
