[ofw] Re: Completion with bad status: IBV_WC_EXC_RETRY_EXC_ERROR

[Diego Guella]

Hi Fab,

I changed endianness of the QPN and things started to work (send/recv).
PSN was 0, so there is no problem for that in this case.
I then changed endianness of the rkey and RDMA operations are working now :)


Many thanks for your help,
Diego


----- Original Message ----- 
>From: "Fab Tillier" <ftillier at windows.microsoft.com>
>

>Hi Diego,
>
>It sounds like you're still having a QP configuration issue, and that 
>you're not yet at the point where RDMA operations would work.  Have you 
> >tried send/receive operations to isolate potential rkey issues?  I suspect 
>these won't work either.
>
>My current theory is an endianess issue somewhere in your application.  If 
>you look at the ib_qp_mod_t structure in ib_types.h, the structure >used as 
>input to the ib_modify_qp function, you will see many fields as 'ib_net32'. 
>These are fields that are treated in network order by the >drivers, and the 
>'ib_netxx' types (or simply 'netxx') are used to identify which fields are 
>network order vs. host order.
>
>Here's the list of fields that you need to treat in network order on 
>Windows.  I don't know how they're handled in Linux:
>->INIT: qkey
>->RTR: rq_psn, dest_qp, primary_av.dlid
>->RTS: sq_psn
>
>It sounds like you have the DLID issue handled correctly, but do you set 
>the destination QP and PSNs properly?
>
>-Fab
>