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-rw-r--r--arch/sparc64/kernel/pci_common.c269
1 files changed, 155 insertions, 114 deletions
diff --git a/arch/sparc64/kernel/pci_common.c b/arch/sparc64/kernel/pci_common.c
index ab6a2e1b76f..f9101966a74 100644
--- a/arch/sparc64/kernel/pci_common.c
+++ b/arch/sparc64/kernel/pci_common.c
@@ -541,142 +541,183 @@ void __init pci_assign_unassigned(struct pci_pbm_info *pbm,
pci_assign_unassigned(pbm, bus);
}
-static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt)
+static inline unsigned int pci_slot_swivel(struct pci_pbm_info *pbm,
+ struct pci_dev *toplevel_pdev,
+ 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;
+ unsigned int ret;
- intmap = &pbm->pbm_intmap[0];
- intmask = &pbm->pbm_intmask;
- num_intmap = pbm->num_pbm_intmap;
- map_slot = 0;
+ if (unlikely(interrupt < 1 || interrupt > 4)) {
+ printk("%s: Device %s interrupt value of %u is strange.\n",
+ pbm->name, pci_name(pdev), interrupt);
+ return interrupt;
+ }
- /* 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;
+ ret = ((interrupt - 1 + (PCI_SLOT(pdev->devfn) & 3)) & 3) + 1;
+
+ printk("%s: %s IRQ Swivel %s [%x:%x] -> [%x]\n",
+ pbm->name, pci_name(toplevel_pdev), pci_name(pdev),
+ interrupt, PCI_SLOT(pdev->devfn), ret);
- bus_dev = pdev->bus->self;
- bus_pcp = bus_dev->sysdata;
- regs_dev = pdev;
- regs_pcp = regs_dev->sysdata;
+ return ret;
+}
- while (bus_dev->bus &&
- bus_dev->bus->number != pbm->pci_first_busno &&
- prom_getproplen(bus_pcp->prom_node,
- "interrupt-map") <= 0) {
- regs_dev = bus_dev;
- regs_pcp = regs_dev->sysdata;
+static inline unsigned int pci_apply_intmap(struct pci_pbm_info *pbm,
+ struct pci_dev *toplevel_pdev,
+ struct pci_dev *pbus,
+ struct pci_dev *pdev,
+ unsigned int interrupt,
+ unsigned int *cnode)
+{
+ struct linux_prom_pci_intmap imap[PROM_PCIIMAP_MAX];
+ struct linux_prom_pci_intmask imask;
+ struct pcidev_cookie *pbus_pcp = pbus->sysdata;
+ struct pcidev_cookie *pdev_pcp = pdev->sysdata;
+ struct linux_prom_pci_registers *pregs = pdev_pcp->prom_regs;
+ int plen, num_imap, i;
+ unsigned int hi, mid, lo, irq, orig_interrupt;
+
+ *cnode = pbus_pcp->prom_node;
+
+ plen = prom_getproperty(pbus_pcp->prom_node, "interrupt-map",
+ (char *) &imap[0], sizeof(imap));
+ if (plen <= 0 ||
+ (plen % sizeof(struct linux_prom_pci_intmap)) != 0) {
+ printk("%s: Device %s interrupt-map has bad len %d\n",
+ pbm->name, pci_name(pbus), plen);
+ goto no_intmap;
+ }
+ num_imap = plen / sizeof(struct linux_prom_pci_intmap);
+
+ plen = prom_getproperty(pbus_pcp->prom_node, "interrupt-map-mask",
+ (char *) &imask, sizeof(imask));
+ if (plen <= 0 ||
+ (plen % sizeof(struct linux_prom_pci_intmask)) != 0) {
+ printk("%s: Device %s interrupt-map-mask has bad len %d\n",
+ pbm->name, pci_name(pbus), plen);
+ goto no_intmap;
+ }
- bus_dev = bus_dev->bus->self;
- bus_pcp = bus_dev->sysdata;
+ orig_interrupt = interrupt;
+
+ hi = pregs->phys_hi & imask.phys_hi;
+ mid = pregs->phys_mid & imask.phys_mid;
+ lo = pregs->phys_lo & imask.phys_lo;
+ irq = interrupt & imask.interrupt;
+
+ for (i = 0; i < num_imap; i++) {
+ if (imap[i].phys_hi == hi &&
+ imap[i].phys_mid == mid &&
+ imap[i].phys_lo == lo &&
+ imap[i].interrupt == irq) {
+ *cnode = imap[i].cnode;
+ interrupt = imap[i].cinterrupt;
}
+ }
- pregs = regs_pcp->prom_regs;
+ printk("%s: %s MAP BUS %s DEV %s [%x] -> [%x]\n",
+ pbm->name, pci_name(toplevel_pdev),
+ pci_name(pbus), pci_name(pdev),
+ orig_interrupt, interrupt);
+no_intmap:
+ return interrupt;
+}
- /* 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;
- }
+/* For each PCI bus on the way to the root:
+ * 1) If it has an interrupt-map property, apply it.
+ * 2) Else, swivel the interrupt number based upon the PCI device number.
+ *
+ * Return the "IRQ controller" node. If this is the PBM's device node,
+ * all interrupt translations are complete, else we should use that node's
+ * "reg" property to apply the PBM's "interrupt-{map,mask}" to the interrupt.
+ */
+static unsigned int __init pci_intmap_match_to_root(struct pci_pbm_info *pbm,
+ struct pci_dev *pdev,
+ unsigned int *interrupt)
+{
+ struct pci_dev *toplevel_pdev = pdev;
+ struct pcidev_cookie *toplevel_pcp = toplevel_pdev->sysdata;
+ unsigned int cnode = toplevel_pcp->prom_node;
- intmask = &bridge_local_intmask;
+ while (pdev->bus->number != pbm->pci_first_busno) {
+ struct pci_dev *pbus = pdev->bus->self;
+ struct pcidev_cookie *pcp = pbus->sysdata;
+ int plen;
- if (pdev->bus->self != bus_dev)
- map_slot = 1;
+ plen = prom_getproplen(pcp->prom_node, "interrupt-map");
+ if (plen <= 0) {
+ *interrupt = pci_slot_swivel(pbm, toplevel_pdev,
+ pdev, *interrupt);
+ cnode = pcp->prom_node;
} else {
- pregs = bus_pcp->prom_regs;
- map_slot = 1;
+ *interrupt = pci_apply_intmap(pbm, toplevel_pdev,
+ pbus, pdev,
+ *interrupt, &cnode);
+
+ while (pcp->prom_node != cnode &&
+ pbus->bus->number != pbm->pci_first_busno) {
+ pbus = pbus->bus->self;
+ pcp = pbus->sysdata;
+ }
}
- }
+ pdev = pbus;
- if (map_slot) {
- *interrupt = ((*interrupt
- - 1
- + PCI_SLOT(pdev->devfn)) & 0x3) + 1;
+ if (cnode == pbm->prom_node)
+ break;
}
- 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;
- }
+ return cnode;
+}
+
+static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt)
+{
+ struct pcidev_cookie *dev_pcp = pdev->sysdata;
+ struct pci_pbm_info *pbm = dev_pcp->pbm;
+ struct linux_prom_pci_registers reg;
+ unsigned int hi, mid, lo, irq;
+ int i, cnode, plen;
+
+ cnode = pci_intmap_match_to_root(pbm, pdev, interrupt);
+ if (cnode == pbm->prom_node)
+ goto success;
+
+ plen = prom_getproperty(cnode, "reg", (char *) &reg, sizeof(reg));
+ if (plen <= 0 ||
+ (plen % sizeof(struct linux_prom_pci_registers)) != 0) {
+ printk("%s: OBP node %x reg property has bad len %d\n",
+ pbm->name, cnode, plen);
+ goto fail;
}
- /* 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");
+ hi = reg.phys_hi & pbm->pbm_intmask.phys_hi;
+ mid = reg.phys_mid & pbm->pbm_intmask.phys_mid;
+ lo = reg.phys_lo & pbm->pbm_intmask.phys_lo;
+ irq = *interrupt & pbm->pbm_intmask.interrupt;
+
+ for (i = 0; i < pbm->num_pbm_intmap; i++) {
+ struct linux_prom_pci_intmap *intmap;
+
+ intmap = &pbm->pbm_intmap[i];
+
+ if (intmap->phys_hi == hi &&
+ intmap->phys_mid == mid &&
+ intmap->phys_lo == lo &&
+ intmap->interrupt == irq) {
+ *interrupt = intmap->cinterrupt;
+ goto success;
+ }
}
+fail:
return 0;
+
+success:
+ printk("PCI-IRQ: Routing bus[%2x] slot[%2x] to INO[%02x]\n",
+ pdev->bus->number, PCI_SLOT(pdev->devfn),
+ *interrupt);
+ return 1;
}
static void __init pdev_fixup_irq(struct pci_dev *pdev)
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-14 19:27:16 +0000