Date: Mon, 7 Nov 2005 00:46:16 +0800 From: kylin <fierykylin@gmail.com> To: John Baldwin <jhb@freebsd.org>, "M. Warner Losh" <imp@bsdimp.com>, "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: misc questions about the device&driver arch Message-ID: <87ab37ab0511060846v203a266dtf6058ebbd4afcc90@mail.gmail.com> In-Reply-To: <200511061007.03634.jhb@FreeBSD.org> References: <87ab37ab0511032030o134b9316j83295dd303e4e44b@mail.gmail.com> <20051105.140416.69987626.imp@bsdimp.com> <87ab37ab0511060314m2eef7458vefc4f5f657ea6501@mail.gmail.com> <200511061007.03634.jhb@FreeBSD.org>
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On 11/6/05, John Baldwin <jhb@freebsd.org> wrote: > On Sunday 06 November 2005 06:14 am, kylin wrote: > > On 11/6/05, M. Warner Losh <imp@bsdimp.com> wrote: > > > In message: <87ab37ab0511032030o134b9316j83295dd303e4e44b@mail.gmail.= com> > > > > > > kylin <fierykylin@gmail.com> writes: > > > : /////////////// > > > : pci bridge dynamic resize > > > : ///////////// > > > : it seems that the device arch of freebsd is similar to what is reve= aled > > > : in window OS. i have read the pcie hotplug tps of windows longhorn = ,it > > > : is said that with some hardware mechanisms the pci bridge driver ca= n do > > > : global pci resource window reconfiguration.so good to the hotplugin= pci > > > : device for it avoid prelocating resource for the device . > > > : i wonder ,if the mem /io/irq reconfiguration possible under freebsd= .:) > > > : 1 > > > > > > Yes. Cardbus does it all the time. However, there's no pcie hot-plu= g > > > support yet, so the process for kicking off configuration of the new > > > device doesn't happen. > > > > > > Warner > > > > sorry for my poor grammar ,i think i confused the public:) i will make > > myself clear with the words below about the PCI Multi-level Rebalance > > > > PCI Multi-level Rebalance in Windows Longhorn > > Updated: November 25, 2003 > > No, FreeBSD doesn't currently do what this decribes yet. It would be pos= sible > to do it by adding a new device_pause() method that drivers would be requ= ired > to implement while the resources were shuffled around though and possibly= a > device_unpause() method so that they could update their state if their > resources were changed while the device was paused. > > -- > John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ > "Power Users Use the Power to Serve" =3D http://www.FreeBSD.org > To be or Not to be ,really a question ,may be the change is so huge that a new branch is suitable -- we who r about to die,salute u!
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