Date: Sun, 6 Nov 2005 10:07:02 -0500 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-hackers@FreeBSD.org Cc: kylin <fierykylin@gmail.com> Subject: Re: misc questions about the device&driver arch Message-ID: <200511061007.03634.jhb@FreeBSD.org> In-Reply-To: <87ab37ab0511060314m2eef7458vefc4f5f657ea6501@mail.gmail.com> References: <87ab37ab0511032030o134b9316j83295dd303e4e44b@mail.gmail.com> <20051105.140416.69987626.imp@bsdimp.com> <87ab37ab0511060314m2eef7458vefc4f5f657ea6501@mail.gmail.com>
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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.co= m> > > > > kylin <fierykylin@gmail.com> writes: > > : /////////////// > > : pci bridge dynamic resize > > : ///////////// > > : it seems that the device arch of freebsd is similar to what is reveal= ed > > : 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 can = do > > : global pci resource window reconfiguration.so good to the hotplugin p= ci > > : 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-plug > > 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 possi= ble=20 to do it by adding a new device_pause() method that drivers would be requir= ed=20 to implement while the resources were shuffled around though and possibly a= =20 device_unpause() method so that they could update their state if their=20 resources were changed while the device was paused. =2D-=20 John Baldwin <jhb@FreeBSD.org> =A0<>< =A0http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" =A0=3D =A0http://www.FreeBSD.org
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