C++ (Cpp) mlx5dv_create_qp Examples

Example #1

File: mlx5_glue.c Project: cjdoucette/dpdk

static struct ibv_qp *
mlx5_glue_dv_create_qp(struct ibv_context *context,
		       struct ibv_qp_init_attr_ex *qp_init_attr_ex,
		       struct mlx5dv_qp_init_attr *dv_qp_init_attr)
{
#ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
	return mlx5dv_create_qp(context, qp_init_attr_ex, dv_qp_init_attr);
#else
	(void)context;
	(void)qp_init_attr_ex;
	(void)dv_qp_init_attr;
	return NULL;
#endif
}

Example #2

File: ib_mlx5_dv.c Project: shamisp/ucx

static ucs_status_t uct_ib_mlx5_check_dc(uct_ib_device_t *dev)
{
    ucs_status_t status = UCS_OK;
    struct ibv_context *ctx = dev->ibv_context;
    struct ibv_qp_init_attr_ex qp_attr = {};
    struct mlx5dv_qp_init_attr dv_attr = {};
    struct ibv_pd *pd;
    struct ibv_cq *cq;
    struct ibv_qp *qp;

    pd = ibv_alloc_pd(ctx);
    if (pd == NULL) {
        ucs_error("ibv_alloc_pd() failed: %m");
        return UCS_ERR_IO_ERROR;
    }

    cq = ibv_create_cq(ctx, 1, NULL, NULL, 0);
    if (cq == NULL) {
        ucs_error("ibv_create_cq() failed: %m");
        status = UCS_ERR_IO_ERROR;
        goto err_cq;
    }

    qp_attr.send_cq              = cq;
    qp_attr.recv_cq              = cq;
    qp_attr.cap.max_send_wr      = 1;
    qp_attr.cap.max_send_sge     = 1;
    qp_attr.qp_type              = IBV_QPT_DRIVER;
    qp_attr.comp_mask            = IBV_QP_INIT_ATTR_PD;
    qp_attr.pd                   = pd;

    dv_attr.comp_mask            = MLX5DV_QP_INIT_ATTR_MASK_DC;
    dv_attr.dc_init_attr.dc_type = MLX5DV_DCTYPE_DCI;

    /* create DCI qp successful means DC is supported */
    qp = mlx5dv_create_qp(ctx, &qp_attr, &dv_attr);
    if (qp) {
        ibv_destroy_qp(qp);
        dev->flags |= UCT_IB_DEVICE_FLAG_DC;
    }

    ibv_destroy_cq(cq);
err_cq:
    ibv_dealloc_pd(pd);
    return status;
}