Date: Wed, 9 Mar 2011 11:17:35 +0100 From: Marius Strobl <marius@alchemy.franken.de> To: "Patrick M. Hausen" <hausen@punkt.de> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: Disable probing of bge1? Message-ID: <20110309101734.GA42208@alchemy.franken.de> In-Reply-To: <B9B3E34F-AE93-41AB-A5F4-732B60A7F35A@punkt.de> References: <B9B3E34F-AE93-41AB-A5F4-732B60A7F35A@punkt.de>
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On Mon, Mar 07, 2011 at 01:26:01PM +0100, Patrick M. Hausen wrote:
> Hi, all,
>
> I just discovered a minor problem when updating some rather dated
> systems from FreeBSD 6.x to 7.x or 8.x.
>
> The servers are Fujitsu Technology Solutions (former Fujitsu-Siemens)
> RX100 S4. The current generation of the same system is RX100 S6, so this
> is two generations old. Some of them still run fine in our datacenter, though.
>
> While the S5 and S6 series features two gigabit ports and an additional
> network interface for out of band management (called iRMC, similar to HP's iLO),
> the S4 has only two gigabit ports and the iRMC interface is piggybacked to
> one of them.
>
> In our standard setup we disable the first interface in the BIOS. If you do this,
> the physical port is available as a dedicated management interface to the iRMC
> and only the second IF is probed by FreeBSD 6.x as bge0.
>
> Now I try to PXE boot an identically configured system via the remote serial
> console with FreeBSD 7. Everything runs fine, until the kernel probes the
> network interfaces. The last thing I see are messages about successful
> probing of both bge0 and bge1 and then my remote management connection
> and my console are gone.
>
> I have to reset the BMC by literally pulling the power to get the iRMC back.
>
> Is it possible to use some device.hints entry to prohibit the probing of bge1?
> I think that would be the easiest solution to the problem? Other suggestions
> are of course welcome. I can provide more config details and dmesg output
> if needed.
>
Unfortunately, there's currently no generic way to disable probing/
attaching of specific PCI devices. You'd need to hack the driver
like in the following example to achieve that:
Index: /usr/src/sys/dev/bge/if_bge.c
===================================================================
--- /usr/src/sys/dev/bge/if_bge.c (revision 213448)
+++ /usr/src/sys/dev/bge/if_bge.c (working copy)
@@ -2472,6 +2472,9 @@ bge_attach(device_t dev)
u_char eaddr[ETHER_ADDR_LEN];
int error, msicount, reg, rid, trys;
+ if (device_get_unit(dev) == 1)
+ return (ENXIO);
+
sc = device_get_softc(dev);
sc->bge_dev = dev;
Marius
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