PCI_GET_MP_PFN
comp_pfn = PCI_GET_MP_PFN(mp, page);
iopfn_t pfn = PCI_GET_MP_PFN(mp, start_idx);
iopfn_t pfn = PCI_GET_MP_PFN(mp, 0);
iopfn_t pfn = PCI_GET_MP_PFN(mp, i);
#define GET_TTE_TEMPLATE(mp) MAKE_TTE_TEMPLATE(PCI_GET_MP_PFN((mp), 0), (mp))