Hi! > Create how-to for SR-IOV user and device driver developer. > > Signed-off-by: Yu Zhao <yu.zhao@xxxxxxxxx> > +1.1 What is SR-IOV > + > +Single Root I/O Virtualization (SR-IOV) is a PCI Express Extended > +capability which makes one physical device appear as multiple virtual > +devices. The physical device is referred to as Physical Function while > +the virtual devices are referred to as Virtual Functions. Allocation > +of Virtual Functions can be dynamically controlled by Physical Function > +via registers encapsulated in the capability. By default, this feature > +is not enabled and the Physical Function behaves as traditional PCIe > +device. Once it's turned on, each Virtual Function's PCI configuration > +space can be accessed by its own Bus, Device and Function Number (Routing > +ID). And each Virtual Function also has PCI Memory Space, which is > used Ok, why is this optional? If intel cares about virtualization, it should enable this by default. I dont see why this should be configurable. > +#ifdef CONFIG_PM > +/* > + * If Physical Function supports the power management, then the > + * SR-IOV needs to be disabled before the adapter goes to sleep, > + * because Virtual Functions will not work when the adapter is in > + * the power-saving mode. > + * The SR-IOV can be enabled again after the adapter wakes up. > + */ How beatiful :-(. -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
