Re: kern/52111: wmX i82574L inoperative in monoprocessor mode (i386)

[Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost>]

Hi,

Thank you very much for detail report!

On 2017/03/28 17:40, Frank Kardel wrote:
> From: Frank Kardel <kardel%netbsd.org@localhost>
> To: gnats-bugs%NetBSD.org@localhost
> Cc: 
> Subject: Re: kern/52111: wmX i82574L inoperative in monoprocessor mode (i386)
> Date: Tue, 28 Mar 2017 10:34:59 +0200
>  I just rebooted with GENERIC "boot netbsd.GENERIC-act -1".
>  Same sad story. So we can avoid going throught the differences.

Hmm, I see.

>  looking with gdb into the live kernel I see
>  (gdb) print hardclock_ticks
>  $13 = 68486
>  (gdb) print hardclock_ticks
>  $14 = 68766
>  it is the right one (not the image)
>  
>  (gdb) print ncpus
>  $19 = 0

Is it "ncpu" typo?

>  wm interrupts don't work in GENERIC either. ARP is not resolved.

Oh, that's an important fact. If wm(4) cannot cause interrupts, the
problem may not be wm(4) specific. When "boot -1", the other devices
can cause interrupts?
# "intrctl list" command can help to get the information

If so, below patch can help to use 82574 when "boot -1".
====================
diff --git a/sys/dev/pci/if_wm.c b/sys/dev/pci/if_wm.c
index f8f10dc3..310ca7f 100644
--- a/sys/dev/pci/if_wm.c
+++ b/sys/dev/pci/if_wm.c
@@ -1828,6 +1828,12 @@ wm_attach(device_t parent, device_t self, void *aux)
 	counts[PCI_INTR_TYPE_MSI] = 1;
 	counts[PCI_INTR_TYPE_INTX] = 1;
 
+	/* XXX 82574 and "boot -1" workaround */
+	if (sc->sc_type == WM_T_82574 && ncpu == 1) {
+		max_type = PCI_INTR_TYPE_INTX;
+		counts[PCI_INTR_TYPE_INTX] = 1;
+	}
+
 alloc_retry:
 	if (pci_intr_alloc(pa, &sc->sc_intrs, counts, max_type) != 0) {
 		aprint_error_dev(sc->sc_dev, "failed to allocate interrupt\n");
====================
# This patch force 82574 use not MSI/MSI-X but INTx like other devices


Thanks,

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Internet Initiative Japan Inc.

Device Engineering Section,
IoT Platform Development Department,
Network Division,
Technology Unit

Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost>