On Thu, Jan 28, 2021 at 02:29:43PM +0800, Xiao Yang wrote: > On 2021/1/27 20:04, Leon Romanovsky wrote: > > On Wed, Jan 27, 2021 at 04:24:31PM +0800, Xiao Yang wrote: > > > Even if we enable sq_sig_all or IBV_SEND_SIGNALED, current rxe > > > module cannot set imm_data in WC when the related WR with imm_data > > > finished on SQ. > > > > > > Signed-off-by: Xiao Yang<yangx.jy@xxxxxxxxxxxxxx> > > > --- > > > > > > Current rxe module and other rdma modules(e.g. mlx5) only set > > > imm_data in WC when the related WR with imm_data finished on RQ. > > > I am not sure if it is a expected behavior. > > This is IBTA behavior. > > > > 5.2.11 IMMEDIATE DATA EXTENDED TRANSPORT HEADER (ImmDt) - 4 BYTES > > "Immediate Data (ImmDt) contains data that is placed in the receive > > Completion Queue Element (CQE). The ImmDt is only allowed in SEND or > > RDMA WRITE packets with Immediate Data." > > > > If I understand the spec, you shouldn't set imm_data in SQ. > Hi Leon, > > About the behavior, I have another question: > For send operation with imm_data, we can verify if the delivered imm_data is > correct by CQE on RQ. > For rdma write operation with imm_data, how to verify if the delivered > imm_data is correct? :-) Probably that I didn't understand the question, but the RDMA WRITE is marked with special opcode in the BTH that indicates imm_data. Thanks > > Best Regards, > Xiao Yang > > Thanks > > > > > > . > > > > >
