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061b27e372
On the HiSilicon accelerators drivers, the PF/VFs driver can send messages to the VFs/PF by writing hardware registers, and the VFs/PF driver receives messages from the PF/VFs by reading hardware registers. To support this feature, a new version id is added, different communication mechanism are used based on different version id. Signed-off-by: Yang Shen <shenyang39@huawei.com> Signed-off-by: Weili Qian <qianweili@huawei.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>