ldc_mem_dring_map
status = ldc_mem_dring_map(vd->ldc_handle, reg_msg->cookie,
rv = ldc_mem_dring_map(ldcp->ldc_handle, &dcookie, ncookies, num_desc,
rv = ldc_mem_dring_map(ldcp->ldc_handle, &dcookie, ncookies, num_desc,
rv = ldc_mem_dring_map(ldcp->ldc_handle, &dp->dring_cookie[0],
int ldc_mem_dring_map(ldc_handle_t handle, ldc_mem_cookie_t *cookie,