From: Benjamin H. <be...@ke...> - 2004-10-27 10:01:44
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On Wed, 2004-10-27 at 02:30 -0400, Len Brown wrote: > Li Shaohua wrote: > > On Tue, 2004-10-26 at 17:21, Pavel Machek wrote: > > >>>Here is a another idea: > >>>Record all PCI writes in Linux kernel... > >> > >>That looks extremely ugly to me. If you want to do something special > >>in resume function, just do it there. It will probably share a lot of > >>code with your init function, anyway. > > > > How can you handle devices without driver? And how to save/restore > > config space for special devices, such as LPC bridge and host bridge? > > Say that writing the missing drivers is the only workable solution. > Does anybody have an estimate of how many there are and how big > a task that would be? This has been discussed a bit on linux-pm (on osdl lists, it's a new list to discuss PM specific matters). I tend to think the core should know at least a few "standard" things like P2P bridges, by simply saving/restoring a bigger chunk of config space. We also need to fix the current restore code I suppose, so that it disables IO & MEM, then restore all registers, then re-enable those 2 ones... I don't want to cross-post between lists, but people are welcome to join linux-pm to talk about implementation issues related to power management, including the changes we are trying to define to the various driver callbacks. Ben. |