On Sun, Mar 24, 2019 at 10:23 PM Wu Hao <hao.wu@xxxxxxxxx> wrote: > > In order to support virtualization usage via PCIe SRIOV, this patch > adds two ioctls under FPGA Management Engine (FME) to release and > assign back the port device. In order to safely turn Port from PF > into VF and enable PCIe SRIOV, it requires user to invoke this > PORT_RELEASE ioctl to release port firstly to remove userspace > interfaces, and then configure the PF/VF access register in FME. > After disable SRIOV, it requires user to invoke this PORT_ASSIGN > ioctl to attach the port back to PF. > > Ioctl interfaces: > * DFL_FPGA_FME_PORT_RELEASE > Release platform device of given port, it deletes port platform > device to remove related userspace interfaces on PF, then > configures PF/VF access mode to VF. > > * DFL_FPGA_FME_PORT_ASSIGN > Assign platform device of given port back to PF, it configures > PF/VF access mode to PF, then adds port platform device back to > re-enable related userspace interfaces on PF. > > Signed-off-by: Zhang Yi Z <yi.z.zhang@xxxxxxxxx> > Signed-off-by: Xu Yilun <yilun.xu@xxxxxxxxx> > Signed-off-by: Wu Hao <hao.wu@xxxxxxxxx> Acked-by: Alan Tull <atull@xxxxxxxxxx>
