Thank you for taking the time in confirming some of the potential strategies I was already thinking about...:-)
I am going to try to pre-allocate some resources for the specific port/slot/bridge device (because we know at all times that port #6 (bus #5) is going to have a FPGA end device associated with it... Any other thoughts - whenever you can make them - would be more than welcome! Tom >> -----Original Message----- >> From: Benjamin Herrenschmidt [mailto:b...@kernel.crashing.org] >> Sent: Wednesday, September 23, 2009 5:42 AM >> To: Morrison, Tom >> Cc: linuxppc-...@ozlabs.org; linux-ker...@vger.kernel.org >> Subject: Re: PCI HotPlug and Adding Resources after Linux Boots >> >> On Tue, 2009-09-22 at 15:36 -0400, Morrison, Tom wrote: >> > I am not exactly sure who to direct this question to (general Linux >> > kernel or LinuxPPC), >> >> PCI Hotplug is reasonably arch specific at the moment so I suppose >> here's is as good as anywhere else to ask :-) >> >> > so I am directing to both - in hopes that someone will recognize this >> > problem - and perhaps >> > >> > give me some suggestions on how to proceed... >> >> There's a few things you can do, though I don't have time just right now >> to give you a detailed answer. I'll try again later. >> >> In the meantime, some of the answers could be around not using full >> automatic resource assignment, but instead, pre-initializing the top >> bridge with some resources that are going to be enough for the device. >> >> You can also try to get the bridge to re-allocate. There's various funky >> locking issues with doing that though as long as it's during boot time, >> it's not too much of a problem. >> >> There are other more or less hackish ways to do it, but I'll have to >> give it more thought. >> >> I'm quite stretched at the moment so if you don't hear back from me in >> the upcoming few days, don't hesitate to ping me again. >> >> Cheers, >> Ben. >> > >> > I am running Linux (2.6.23x (and 2.6.27.x)) on a MPC8572 based system. >> [Morrison, Tom] <snip the rest original msg> _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
