On Fri, Jul 01, 2016 at 04:41:52 +0000, Yuval Mintz wrote: > > > > Chelsio T4/T5 cards have SR-IOV Capabilities on Physical Functions > > > > 0..3 and the administrative Driver(cxgb4) attaches to Physical Function > > > > 4. > > > > Each of the Physical Functions 0..3 can support up to 16 Virtual > > > > Functions. With the current Linux APIs, a 2-Port card would only be > > > > able to use the Virtual Functions on Physical Functions 0..1 and not > > > > allow the Virtual Functions on Physical Functions 2..3 to be used since > > > > there are no Ports 2..3 on a 2-Port card. > > > > > > > > Also the current ip commands takes netdev as one of the argument, and > > > > it assumes a 1-to-1 mapping of Network Ports, Physical Functions and the > > > > SR-IOV Virtual Functions of those Physical Functions. But it is not > > > > true in our case and won't work for us. > > > > > > > > Added a new argument to specify the PF number associated with the VF, to > > > > fix this. > > > > > > I don't get it - what's the exact definition of 'Physical Function'? > > > Are we talking PCI functions? Logical partitons? Something else? > > > Its PCIe physical function. Physical functions (PFs) are full-featured > > PCIe functions; virtual functions (VFs) are "lightweight" functions that > > lack configuration resource. > > Seems like a bad precedent to me - the control node is always the netdevice. > While I understand your need, looks like what you really want some kind of > a dummy netdevice for the higher PFs through which you could control their > VFs.
Hi Dave and all, Based on above comment, since the control node should always be net_device, we will go with the below implementation. We will have dummy net devices with 00:00:00:00:00:00 mac address. The device won't be associated with any port, since it doesn't need to transmit/receive. On a two port adapter, we need to create 4 dummy net devices, corresponding to PF0 ... PF3. Basically the dummy net device will have callback's only for "ndo_set_vf_*" API's. Thanks, Hariprasad Shenai
