Messages in this thread | | | Date | Wed, 17 Jan 2007 13:33:18 -0800 | From | Greg KH <> | Subject | Re: PME_Turn_Off in Linux |
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On Wed, Jan 17, 2007 at 10:43:14AM -0600, Miller, Mike (OS Dev) wrote: > Hello, > We've been seeing some nasty data corruption issues on some platforms. > We've been capturing PCI-E traces looking for something nasty but we > haven't found anything yet. One of the hardware guys if asking if there > is a call in Linux to issue a PME_Turn_Off broadcast message. > > PME_Turn_Off Broadcast Message > Before main component power and reference clocks are turned off, the > Root Complex or Switch Downstream Port must issue a broadcast Message > that instructs all agents downstream of that point within the hierarchy > to cease initiation of any subsequent PM_PME Messages, effective > immediately upon receipt of the PME_Turn_Off Message. > > This must be initiated from the root complex. Is there such a call in > linux?
This firmware that implements the PCI-E connection should do this, I don't think there is anything that the Operating system can do to control this, as PCI-E should be transparant to the OS.
Unless this is on a PCI-E Hotplug system? What is the sequence of events that cause the data corruption?
thanks,
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