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-newbie" 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.linux-learn.org/faqs
