[ofa-general] umad SLID and LMC

[Hal Rosenstock]

On Sun, Aug 2, 2009 at 5:45 PM, Todd Rimmer <todd.rimmer at qlogic.com> wrote:

> What is the proper way to control the SLID used for outgoing umad sends?
>
> For example, when using LMC>0, the PathRecord returned from the SM for
> talking to a given remove node may have a SLID which is not the BaseLid for
> the sender.  How does the sender ensure the correct SLID is used for the
> outgoing mad?
>
> In reviewing the API it seems like the only way to do this is:
> void *umad = umad_alloc(...);
>
> // call various umad calls to initialize address and contents
> umad_get_mad_addr(umad)->path_bits = lower LMC bits of SLID;
>
> umad_send(..., umad, ...);
>
> Was path_bits an intentional omission in the API?


No; it was an unintentional omission AFAIT.


>  It would seem that a function which could update the ib_mad_addr in a umad
> given a path record would seem appropriate.


Seems reasonable to me. Care to supply a patch ?

-- Hal


>
> Todd Rimmer
> Chief Architect
> QLogic Network Systems Group
> Voice: 610-233-4852     Fax: 610-233-4777
> Todd.Rimmer at QLogic.com  www.QLogic.com <http://www.qlogic.com/>
>
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