> > - ULP calls a 'rdma_post_close_rkey' helper
> > * For FRWR this posts the INVALIDATE
>
> Note: Some send operations automatically invalidate an rkey (and the
> lkey for IB?). This is intended to avoid having to post the
> invalidate WR explicitly. Namely IB_WR_READ_WITH_INV and
> IB_WR_SEND_WITH_INV.
IB_WR_RDMA_READ_WITH_INV is only meaningful/implemented for iWarp. Can
you confirm what it does?
wc.opcode = IB_WR_RDMA_READ_WITH_INV
wc.sg_list[0].lkey = LKEY;
wc.rdma.rkey = RKEY;
Does it locally invalidate LKEY or remotely invalidate RKEY? I'm
feeling pretty confident to guess it invalidates LKEY..
'rdma_post_close_rkey' wouldn't work with lkeys, hence the name :)
IB_WR_SEND_WITH_INV is sadly never used in the kernel. It does
invalidate an rkey, and would have to interact with a
'rdma_post_close_rkey'.
A generic flow could be something like:
if (rdma_post_close_rkey_wc(qp,rkey,wc,...) ..)
// invalidate triggred by the peer, all done.
else
// Peer didn't invalidate, func queued it locally, ULP waits for the next
completion, then all done.
else
// Error
Where the _wc varient checks the wc to confirm that the requested rkey
has been invalidated.
Jason
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