RDMA/i40iw: Adding queue drain functions
Adding sq and rq drain functions, which block until all previously posted wr-s in the specified queue have completed. A completion object is signaled to unblock the thread, when the last cqe for the corresponding queue is processed. Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com> Signed-off-by: Faisal Latif <faisal.latif@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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@ -789,6 +789,8 @@ static struct ib_qp *i40iw_create_qp(struct ib_pd *ibpd,
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return ERR_PTR(err_code);
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}
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}
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init_completion(&iwqp->sq_drained);
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init_completion(&iwqp->rq_drained);
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return &iwqp->ibqp;
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error:
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@ -1581,6 +1583,32 @@ static int i40iw_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_ne
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return ib_sg_to_pages(ibmr, sg, sg_nents, i40iw_set_page);
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}
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/**
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* i40iw_drain_sq - drain the send queue
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* @ibqp: ib qp pointer
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*/
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static void i40iw_drain_sq(struct ib_qp *ibqp)
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{
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struct i40iw_qp *iwqp = to_iwqp(ibqp);
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struct i40iw_sc_qp *qp = &iwqp->sc_qp;
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if (I40IW_RING_MORE_WORK(qp->qp_uk.sq_ring))
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wait_for_completion(&iwqp->sq_drained);
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}
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/**
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* i40iw_drain_rq - drain the receive queue
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* @ibqp: ib qp pointer
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*/
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static void i40iw_drain_rq(struct ib_qp *ibqp)
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{
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struct i40iw_qp *iwqp = to_iwqp(ibqp);
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struct i40iw_sc_qp *qp = &iwqp->sc_qp;
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if (I40IW_RING_MORE_WORK(qp->qp_uk.rq_ring))
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wait_for_completion(&iwqp->rq_drained);
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}
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/**
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* i40iw_hwreg_mr - send cqp command for memory registration
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* @iwdev: iwarp device
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@ -2218,6 +2246,7 @@ static int i40iw_poll_cq(struct ib_cq *ibcq,
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enum i40iw_status_code ret;
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struct i40iw_cq_uk *ukcq;
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struct i40iw_sc_qp *qp;
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struct i40iw_qp *iwqp;
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unsigned long flags;
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iwcq = (struct i40iw_cq *)ibcq;
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@ -2268,6 +2297,13 @@ static int i40iw_poll_cq(struct ib_cq *ibcq,
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qp = (struct i40iw_sc_qp *)cq_poll_info.qp_handle;
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entry->qp = (struct ib_qp *)qp->back_qp;
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entry->src_qp = cq_poll_info.qp_id;
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iwqp = (struct i40iw_qp *)qp->back_qp;
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if (iwqp->iwarp_state > I40IW_QP_STATE_RTS) {
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if (!I40IW_RING_MORE_WORK(qp->qp_uk.sq_ring))
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complete(&iwqp->sq_drained);
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if (!I40IW_RING_MORE_WORK(qp->qp_uk.rq_ring))
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complete(&iwqp->rq_drained);
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}
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entry->byte_len = cq_poll_info.bytes_xfered;
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entry++;
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cqe_count++;
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@ -2514,6 +2550,8 @@ static struct i40iw_ib_device *i40iw_init_rdma_device(struct i40iw_device *iwdev
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iwibdev->ibdev.query_device = i40iw_query_device;
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iwibdev->ibdev.create_ah = i40iw_create_ah;
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iwibdev->ibdev.destroy_ah = i40iw_destroy_ah;
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iwibdev->ibdev.drain_sq = i40iw_drain_sq;
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iwibdev->ibdev.drain_rq = i40iw_drain_rq;
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iwibdev->ibdev.alloc_mr = i40iw_alloc_mr;
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iwibdev->ibdev.map_mr_sg = i40iw_map_mr_sg;
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iwibdev->ibdev.iwcm = kzalloc(sizeof(*iwibdev->ibdev.iwcm), GFP_KERNEL);
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@ -170,5 +170,7 @@ struct i40iw_qp {
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struct i40iw_pbl *iwpbl;
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struct i40iw_dma_mem q2_ctx_mem;
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struct i40iw_dma_mem ietf_mem;
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struct completion sq_drained;
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struct completion rq_drained;
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};
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#endif
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