vmxnet3: add support for capability registers
This patch enhances vmxnet3 to suuport capability registers which allows it to enable features selectively. The DCR register tracks the capabilities vmxnet3 device supports. The PTCR register states the capabilities that the passthrough device supports. With the help of these registers, vmxnet3 can enable only those features which the passthrough device supoprts. This allows smooth trasition to Uniform-Passthrough (UPT) mode if the virtual nic requests it. If PTCR register returns nothing or error it means UPT is not being requested and vnic will continue in emulation mode. Signed-off-by:Ronak Doshi <doshir@vmware.com> Acked-by:
Guolin Yang <gyang@vmware.com> Signed-off-by:
Paolo Abeni <pabeni@redhat.com>
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55f0395f
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