Messages in this thread | | | Subject | Re: pci error recovery procedure | From | "Zhang, Yanmin" <> | Date | Wed, 06 Sep 2006 09:35:21 +0800 |
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On Wed, 2006-09-06 at 02:50, Linas Vepstas wrote: > On Mon, Sep 04, 2006 at 07:03:12PM +1000, Benjamin Herrenschmidt wrote: > > > > > As you know, all functions of a device share the same bus number and 5 bit dev number. > > > They just have different 3 bit function number. We could deduce if functions are in the same > > > device (slot). > > > > Until you have a P2P bridge ... > > And this is not theoretical: for example, the matrox graphics cards: > > 0000:c8:01.0 PCI bridge: Hint Corp HB6 Universal PCI-PCI bridge (non-transparent mode) (rev 13) > 0000:c9:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 85) > > Now, I could have sworn there was another device behind this bridge, > some serial or joystick controller or something, although this > particular card doesn't seem to have it. Thanks. My comments above in this email is just to try to find a method to judge if 2 or more functions belongs to the same device. If it's not right, it still doesn't hurt the new API pci_error_handlers.
> > ------ > It's not clear to me what hardware may show up in the future. > For example, someone may build a 32x PCI-E card that will act > as a bridge to a drawer with half-a-dozen ordinary PCI-X slots > in it. This is perhaps a bit hypothetical, but changing the API > will make it harder to implement eror recovery for such a system. I agree that it's difficult to predict the future. At least the new API could process the example.
> FWIW, there is at least one pSeries system in the lab which has > several hundred PCI slots attached to it, although I've never > done testing on it. Hmm. Maybe its time I did ... > > --linas - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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