[openib-general] Handling SM class (SMInfo vs. other queries)

[Roland Dreier]

    Hal> This applies to Sets of SMInfo as well as Gets.

True, good point.

    Hal> The registration interface will need to be extended somehow
    Hal> for this.  I don't think we want to add an attribute ID mask
    Hal> :-) The simplest way I can think of is to add an issm bit to
    Hal> the registration request structure and special case these
    Hal> unsolicited receives to go to the SM if it has been
    Hal> registered and to drop otherwise.

All these special cases are starting to look pretty awkward.  Another
solution is to get rid of the snoop_mad entry point and the SMA and
PMA agents in ib_smi, and just pass every MAD to the low-level
driver.  The low-level driver can decide to handle it (consume it
and/or generate a response) or not.  Everything not consumed by the
low-level driver gets put through agent dispatch as usual.

This also avoids having to add another agent for BMA to ib_smi.  Also
it makes it pretty easy for low-level drivers to handle
vendor-specific GSI classes (of course drivers can register an agent
for every port and class they want to handle but it turns into a bit
of a pain).

 - R.