C++ (Cpp) isert_get_cq_idx Beispiele

Beispiel #1

Datei: iser_rdma.c Projekt: christopherdion/scst

static int isert_conn_qp_create(struct isert_connection *isert_conn)
{
	struct rdma_cm_id *cm_id = isert_conn->cm_id;
	struct isert_device *isert_dev = isert_conn->isert_dev;
	struct ib_qp_init_attr qp_attr;
	int err;
	int cq_idx;
	int max_wr = ISER_MAX_WCE;

	TRACE_ENTRY();

	cq_idx = isert_get_cq_idx(isert_dev);

	memset(&qp_attr, 0, sizeof(qp_attr));

	qp_attr.event_handler = isert_async_evt_handler;
	qp_attr.qp_context = isert_conn;
	qp_attr.send_cq = isert_dev->cq_desc[cq_idx].cq;
	qp_attr.recv_cq = isert_dev->cq_desc[cq_idx].cq;

	isert_conn->cq_desc = &isert_dev->cq_desc[cq_idx];

	qp_attr.cap.max_send_sge = isert_conn->max_sge;
	qp_attr.cap.max_recv_sge = 3;
	qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
	qp_attr.qp_type = IB_QPT_RC;

	do {
		if (max_wr < ISER_MIN_SQ_SIZE) {
			pr_err("Failed to create qp, not enough memory\n");
			goto fail_create_qp;
		}

		qp_attr.cap.max_send_wr = max_wr;
		qp_attr.cap.max_recv_wr = max_wr;

		err = rdma_create_qp(cm_id, isert_dev->pd, &qp_attr);
		if (err && err != -ENOMEM) {
			pr_err("Failed to create qp, err:%d\n", err);
			goto fail_create_qp;
		}

		max_wr /= 2;
	} while (err == -ENOMEM);

	isert_conn->qp = cm_id->qp;

	pr_info("iser created cm_id:%p qp:0x%X\n", cm_id, cm_id->qp->qp_num);

out:
	TRACE_EXIT_RES(err);
	return err;

fail_create_qp:
	mutex_lock(&dev_list_mutex);
	isert_dev->cq_qps[cq_idx]--;
	mutex_unlock(&dev_list_mutex);
	goto out;
}

Beispiel #2

Datei: iser_rdma.c Projekt: qtsky89/scst

static int isert_conn_qp_create(struct isert_connection *isert_conn)
{
	struct rdma_cm_id *cm_id = isert_conn->cm_id;
	struct isert_device *isert_dev = isert_conn->isert_dev;
	struct ib_qp_init_attr qp_attr;
	int err;
	int cq_idx;
	int max_wr = ISER_MAX_WCE;

	TRACE_ENTRY();

	cq_idx = isert_get_cq_idx(isert_dev);

	memset(&qp_attr, 0, sizeof(qp_attr));

	qp_attr.event_handler = isert_async_evt_handler;
	qp_attr.qp_context = isert_conn;
	qp_attr.send_cq = isert_dev->cq_desc[cq_idx].cq;
	qp_attr.recv_cq = isert_dev->cq_desc[cq_idx].cq;

	isert_conn->cq_desc = &isert_dev->cq_desc[cq_idx];

	/*
	 * A quote from the OFED 1.5.3.1 release notes
	 * (docs/release_notes/mthca_release_notes.txt), section "Known Issues":
	 * In mem-free devices, RC QPs can be created with a maximum of
	 * (max_sge - 1) entries only; UD QPs can be created with a maximum of
	 * (max_sge - 3) entries.
	 * A quote from the OFED 1.2.5 release notes
	 * (docs/mthca_release_notes.txt), section "Known Issues":
	 * In mem-free devices, RC QPs can be created with a maximum of
	 * (max_sge - 3) entries only.
	 */
	isert_conn->max_sge = isert_dev->device_attr.max_sge - 3;

	WARN_ON(isert_conn->max_sge < 1);

	qp_attr.cap.max_send_sge = isert_conn->max_sge;
	qp_attr.cap.max_recv_sge = 3;
	qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
	qp_attr.qp_type = IB_QPT_RC;

	do {
		if (max_wr < ISER_MIN_SQ_SIZE) {
			pr_err("Failed to create qp, not enough memory\n");
			goto fail_create_qp;
		}

		qp_attr.cap.max_send_wr = max_wr;
		qp_attr.cap.max_recv_wr = max_wr;

		err = rdma_create_qp(cm_id, isert_dev->pd, &qp_attr);
		if (err && err != -ENOMEM) {
			pr_err("Failed to create qp, err:%d\n", err);
			goto fail_create_qp;
		}

		max_wr /= 2;
	} while (err == -ENOMEM);

	isert_conn->qp = cm_id->qp;

	pr_info("iser created cm_id:%p qp:0x%X\n", cm_id, cm_id->qp->qp_num);

out:
	TRACE_EXIT_RES(err);
	return err;

fail_create_qp:
	mutex_lock(&dev_list_mutex);
	isert_dev->cq_qps[cq_idx]--;
	mutex_unlock(&dev_list_mutex);
	goto out;
}