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Commit 07c72d7d authored by Tatyana Nikolova's avatar Tatyana Nikolova Committed by Doug Ledford
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i40iw: Send last streaming mode message for loopback connections 



Send a zero length last streaming mode message for loopback
connections to synchronize between accepting QP and connecting QP.
This avoids data transfer to start on the accepting QP before
the connecting QP is in RTS. Also remove function i40iw_loopback_nop()
as it is no longer used.

Fixes: f27b4746 ("i40iw: add connection management code")

Signed-off-by: default avatarTatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: default avatarShiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 3c199b45

drivers/infiniband/hw/i40iw/i40iw_cm.c

+1 −21
Original line number Diff line number Diff line
@@ -3346,26 +3346,6 @@ int i40iw_cm_disconn(struct i40iw_qp *iwqp) 
	return 0;

}



/**

 * i40iw_loopback_nop - Send a nop

 * @qp: associated hw qp

 */

static void i40iw_loopback_nop(struct i40iw_sc_qp *qp)

{

	u64 *wqe;

	u64 header;



	wqe = qp->qp_uk.sq_base->elem;

	set_64bit_val(wqe, 0, 0);

	set_64bit_val(wqe, 8, 0);

	set_64bit_val(wqe, 16, 0);



	header = LS_64(I40IWQP_OP_NOP, I40IWQPSQ_OPCODE) |

	    LS_64(0, I40IWQPSQ_SIGCOMPL) |

	    LS_64(qp->qp_uk.swqe_polarity, I40IWQPSQ_VALID);

	set_64bit_val(wqe, 24, header);

}



/**

 * i40iw_qp_disconnect - free qp and close cm

 * @iwqp: associate qp for the connection
@@ -3638,7 +3618,7 @@ int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 
	} else {

		if (iwqp->page)

			iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);

		i40iw_loopback_nop(&iwqp->sc_qp);

		dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);

	}



	if (iwqp->page)