Hi All,
I have the following doubt
Why do we use two step mehanism for interacting HCA driver with IBBUS.SYS.
Mechanism Used
First we look for the GUID_IB_CI_INTERFACE's (created by IBBUS) arrival in
HCA driver
Then we get the ib_register_ca ,ib_deregister_ca and other function pointer
via IRP_MN_QUERY_INTERFACE on ibbus.
Then we regiser HCA driver to the core(ibbus) providing funtion pointer to
the verbs implementation
Above interaction could have achieved in just one step if IBBUS.SYS would
have exported ib_register_ca ,ib_bus_deregister_ca.
Or Mechanism used satisfy some other requirements also which I am not able to
decipher.
Cheers
Deepak
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