[ewg] APM over multiple HCA

[pavan tc]

Hi,

Please respond to my mail address since I am not part of the ewg list.

I am attempting APM over multiple HCAs. I would like to know if this is
supported. I am unable to find documentation regarding the same.

What are the fields of the ib_qp_attr structure I would need to initialize
to get this to work? My understanding is that I would need to specify the
SGID, SLID, DGID and DLID of the alternate path. But I don't find a
location where I can specify the SGID and the SLID. The alt_ah_attr member
of the ib_qp_attr structure seems to have the DGID and the DLID fields, but
I am unable to locate a structure that holds the SGID and the SLID for the
alternate path. All I see is a alt_port_num which seems to be useful only
if I am using APM over the two ports of the same HCA.

Thanks,
Pavan
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