hpt_iopmu_mvfrey
(struct hpt_iopmu_mvfrey *)rman_get_virtual(hba->bar2_res);
hba->bar2h, offsetof(struct hpt_iopmu_mvfrey, offset), value)
hba->bar2h, offsetof(struct hpt_iopmu_mvfrey, offset))
struct hpt_iopmu_mvfrey *mu;