-static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt)
-{
- struct linux_prom_pci_intmap bridge_local_intmap[PROM_PCIIMAP_MAX], *intmap;
- struct linux_prom_pci_intmask bridge_local_intmask, *intmask;
- struct pcidev_cookie *dev_pcp = pdev->sysdata;
- struct pci_pbm_info *pbm = dev_pcp->pbm;
- struct linux_prom_pci_registers *pregs = dev_pcp->prom_regs;
- unsigned int hi, mid, lo, irq;
- int i, num_intmap, map_slot;
-
- intmap = &pbm->pbm_intmap[0];
- intmask = &pbm->pbm_intmask;
- num_intmap = pbm->num_pbm_intmap;
- map_slot = 0;
-
- /* If we are underneath a PCI bridge, use PROM register
- * property of the parent bridge which is closest to
- * the PBM.
- *
- * However if that parent bridge has interrupt map/mask
- * properties of its own we use the PROM register property
- * of the next child device on the path to PDEV.
- *
- * In detail the two cases are (note that the 'X' below is the
- * 'next child on the path to PDEV' mentioned above):
- *
- * 1) PBM --> PCI bus lacking int{map,mask} --> X ... PDEV
- *
- * Here we use regs of 'PCI bus' device.
- *
- * 2) PBM --> PCI bus with int{map,mask} --> X ... PDEV
- *
- * Here we use regs of 'X'. Note that X can be PDEV.
- */
- if (pdev->bus->number != pbm->pci_first_busno) {
- struct pcidev_cookie *bus_pcp, *regs_pcp;
- struct pci_dev *bus_dev, *regs_dev;
- int plen;
-
- bus_dev = pdev->bus->self;
- regs_dev = pdev;
-
- while (bus_dev->bus &&
- bus_dev->bus->number != pbm->pci_first_busno) {
- regs_dev = bus_dev;
- bus_dev = bus_dev->bus->self;
- }
-
- regs_pcp = regs_dev->sysdata;
- pregs = regs_pcp->prom_regs;
-
- bus_pcp = bus_dev->sysdata;
-
- /* But if the PCI bridge has it's own interrupt map
- * and mask properties, use that and the regs of the
- * PCI entity at the next level down on the path to the
- * device.
- */
- plen = prom_getproperty(bus_pcp->prom_node, "interrupt-map",
- (char *) &bridge_local_intmap[0],
- sizeof(bridge_local_intmap));
- if (plen != -1) {
- intmap = &bridge_local_intmap[0];
- num_intmap = plen / sizeof(struct linux_prom_pci_intmap);
- plen = prom_getproperty(bus_pcp->prom_node,
- "interrupt-map-mask",
- (char *) &bridge_local_intmask,
- sizeof(bridge_local_intmask));
- if (plen == -1) {
- printk("pci_intmap_match: Warning! Bridge has intmap "
- "but no intmask.\n");
- printk("pci_intmap_match: Trying to recover.\n");
- return 0;
- }
-
- if (pdev->bus->self != bus_dev)
- map_slot = 1;
- } else {
- pregs = bus_pcp->prom_regs;
- map_slot = 1;
- }
- }
-
- if (map_slot) {
- *interrupt = ((*interrupt
- - 1
- + PCI_SLOT(pdev->devfn)) & 0x3) + 1;
- }
-
- hi = pregs->phys_hi & intmask->phys_hi;
- mid = pregs->phys_mid & intmask->phys_mid;
- lo = pregs->phys_lo & intmask->phys_lo;
- irq = *interrupt & intmask->interrupt;
-
- for (i = 0; i < num_intmap; i++) {
- if (intmap[i].phys_hi == hi &&
- intmap[i].phys_mid == mid &&
- intmap[i].phys_lo == lo &&
- intmap[i].interrupt == irq) {
- *interrupt = intmap[i].cinterrupt;
- printk("PCI-IRQ: Routing bus[%2x] slot[%2x] map[%d] to INO[%02x]\n",
- pdev->bus->number, PCI_SLOT(pdev->devfn),
- map_slot, *interrupt);
- return 1;
- }
- }
-
- /* We will run this code even if pbm->num_pbm_intmap is zero, just so
- * we can apply the slot mapping to the PROM interrupt property value.
- * So do not spit out these warnings in that case.
- */
- if (num_intmap != 0) {
- /* Print it both to OBP console and kernel one so that if bootup
- * hangs here the user has the information to report.
- */
- prom_printf("pci_intmap_match: bus %02x, devfn %02x: ",
- pdev->bus->number, pdev->devfn);
- prom_printf("IRQ [%08x.%08x.%08x.%08x] not found in interrupt-map\n",
- pregs->phys_hi, pregs->phys_mid, pregs->phys_lo, *interrupt);
- prom_printf("Please email this information to davem@redhat.com\n");
-
- printk("pci_intmap_match: bus %02x, devfn %02x: ",
- pdev->bus->number, pdev->devfn);
- printk("IRQ [%08x.%08x.%08x.%08x] not found in interrupt-map\n",
- pregs->phys_hi, pregs->phys_mid, pregs->phys_lo, *interrupt);
- printk("Please email this information to davem@redhat.com\n");
- }
-
- return 0;
-}
-