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<DIV><FONT face=Arial size=2>Hi All,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have the following doubt</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Why do we use two step mehanism for interacting HCA
driver with IBBUS.SYS.</FONT></DIV>
<DIV><FONT face=Arial size=2><STRONG></STRONG></FONT> </DIV>
<DIV><FONT face=Arial size=2><STRONG>Mechanism Used</STRONG></FONT></DIV>
<DIV><FONT face=Arial size=2> First we look for the
GUID_IB_CI_INTERFACE's (created by IBBUS) arrival in HCA
driver</FONT></DIV>
<DIV><FONT face=Arial size=2> Then we get the ib_register_ca
,ib_deregister_ca and other function pointer via IRP_MN_QUERY_INTERFACE on
ibbus.</FONT></DIV>
<DIV><FONT face=Arial size=2> Then we regiser HCA driver to
the core(ibbus) providing funtion pointer to the verbs
implementation</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> Above interaction could
have achieved in just one step if IBBUS.SYS would have exported <FONT
color=#ff0000>ib_register_ca ,ib_bus_deregister_ca.</FONT></FONT></DIV>
<DIV><FONT face=Arial color=#ff0000 size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Or Mechanism used satisfy some other requirements
also which I am not able to decipher.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Cheers</FONT></DIV>
<DIV><FONT face=Arial size=2>Deepak</FONT></DIV>
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