On 7/28/05, Rajat Jain <[email protected]> wrote:
> >
> > Hi Rajat, you can learn more about the OSHP method by reading the PCI
> > express spec. It is used to tell an ACPI bios that the OS will be
> > handling the hotplug events natively. It may be that your BIOS does
> > not allow native hotplug for pcie, in which case you need to be using
> > the acpiphp driver instead of the pciehp driver. You could just try
> > modprobing acpiphp and see if this will handle the hotplug events. A
> > recent version of lspci (which understands pcie) will tell you as well
> > if pcie hotplug capability is supported (lspci -vv).
> >
>
> Okay. I'm sorry but I'm not very clear with this. I'm just putting
> down here my understanding. So basically we have two mutually
> EXCLUSIVE hotplug drivers I can use for PCI Express:
>
> 1) "pciehp.ko" : We use this PCIE HP driver when our BIOS supports
> Native Hot-plug for PCI Express (which means that hot-plug will be
> handled by OS single handedly).
>
> 2) "acpiphp.ko" : We use this "generic" ACPI HP driver when BIOS
> allows only ITSELF to handle hot-plug events.
usually this is configurable. So, you can configure you BIOS to use
acpi to handle hot-plug, or you can allow the OS to handle it. Most
OS (from what I hear) don't actually implement native hotplug support,
so native hotplug support is probably not as big a priority for bios
writers as the acpi support. so, it doesn't surprise me to find some
that don't support native.
you can run the native hotplug driver on a system who's bios supports
acpi - if it provides the OSHP method, this tells the bios to allow
the OS to handle it.
>
> Is my understanding correct? I would appreciate if you could help me
> gain a grip on this.
i'm trying to gain a grip myself, as i've just started learning about
pcie :). someone else hopefully will correct me if i'm telling you
the wrong info.
>
> Thanks a lot for the useful info you gave. Provided me with a new
> direction to work on.
>
> Regards,
>
> Rajat
>
Kristen
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |