int
acpi_pcib_attach(device_t dev, ACPI_BUFFER *prt, int busno)
{
ACPI_STATUS status;
int error;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
/*
* Don't attach if we're not really there.
*
* XXX: This isn't entirely correct since we may be a PCI bus
* on a hot-plug docking station, etc.
*/
if (!acpi_DeviceIsPresent(dev))
return_VALUE(ENXIO);
/*
* Get the PCI interrupt routing table for this bus. If we can't
* get it, this is not an error but may reduce functionality. There
* are several valid bridges in the field that do not have a _PRT, so
* only warn about missing tables if bootverbose is set.
*/
prt->Length = ACPI_ALLOCATE_BUFFER;
status = AcpiGetIrqRoutingTable(acpi_get_handle(dev), prt);
if (ACPI_FAILURE(status) && (bootverbose || status != AE_NOT_FOUND))
device_printf(dev,
"could not get PCI interrupt routing table for %s - %s\n",
acpi_name(acpi_get_handle(dev)), AcpiFormatException(status));
/*
* Attach the PCI bus proper.
*/
if (device_add_child(dev, "pci", busno) == NULL) {
device_printf(device_get_parent(dev), "couldn't attach pci bus\n");
return_VALUE(ENXIO);
}
/*
* Now go scan the bus.
*/
prt_walk_table(prt, prt_attach_devices, dev);
error = bus_generic_attach(dev);
return_VALUE(error);
}
int
acpi_pcib_attach(device_t dev, ACPI_BUFFER *prt, int busno)
{
device_t child;
ACPI_STATUS status;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (!acpi_DeviceIsPresent(dev)) {
/* Caller should already have checked it */
panic("%s device is not present", __func__);
}
ACPI_SERIAL_INIT(pcib);
/*
* Get the PCI interrupt routing table for this bus. If we can't
* get it, this is not an error but may reduce functionality. There
* are several valid bridges in the field that do not have a _PRT, so
* only warn about missing tables if bootverbose is set.
*/
prt->Length = ACPI_ALLOCATE_BUFFER;
status = AcpiGetIrqRoutingTable(acpi_get_handle(dev), prt);
if (ACPI_FAILURE(status) && (bootverbose || status != AE_NOT_FOUND))
device_printf(dev,
"could not get PCI interrupt routing table for %s - %s\n",
acpi_name(acpi_get_handle(dev)), AcpiFormatException(status));
/*
* Attach the PCI bus proper.
*/
if ((child = device_add_child(dev, "pci", busno)) == NULL) {
device_printf(device_get_parent(dev), "couldn't attach pci bus\n");
return_VALUE(ENXIO);
}
/*
* Now go scan the bus.
*/
prt_walk_table(prt, prt_attach_devices, dev);
return_VALUE (bus_generic_attach(dev));
}
/*
* Route an interrupt for a child of the bridge.
*/
int
acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin,
ACPI_BUFFER *prtbuf)
{
ACPI_PCI_ROUTING_TABLE *prt;
struct prt_lookup_request pr;
ACPI_HANDLE lnkdev;
int interrupt;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
interrupt = PCI_INVALID_IRQ;
/* ACPI numbers pins 0-3, not 1-4 like the BIOS. */
pin--;
ACPI_SERIAL_BEGIN(pcib);
/* Search for a matching entry in the routing table. */
pr.pr_entry = NULL;
pr.pr_pin = pin;
pr.pr_slot = pci_get_slot(dev);
prt_walk_table(prtbuf, prt_lookup_device, &pr);
if (pr.pr_entry == NULL) {
device_printf(pcib, "no PRT entry for %d.%d.INT%c\n", pci_get_bus(dev),
pci_get_slot(dev), 'A' + pin);
goto out;
}
prt = pr.pr_entry;
if (bootverbose) {
device_printf(pcib, "matched entry for %d.%d.INT%c",
pci_get_bus(dev), pci_get_slot(dev), 'A' + pin);
if (prt->Source != NULL && prt->Source[0] != '\0')
printf(" (src %s:%u)", prt->Source, prt->SourceIndex);
printf("\n");
}
/*
* If source is empty/NULL, the source index is a global IRQ number
* and it's hard-wired so we're done.
*
* XXX: If the source index is non-zero, ignore the source device and
* assume that this is a hard-wired entry.
*/
if (prt->Source == NULL || prt->Source[0] == '\0' ||
prt->SourceIndex != 0) {
if (bootverbose)
device_printf(pcib, "slot %d INT%c hardwired to IRQ %d\n",
pci_get_slot(dev), 'A' + pin, prt->SourceIndex);
if (prt->SourceIndex) {
interrupt = prt->SourceIndex;
BUS_CONFIG_INTR(dev, interrupt, INTR_TRIGGER_LEVEL,
INTR_POLARITY_LOW);
} else
device_printf(pcib, "error: invalid hard-wired IRQ of 0\n");
goto out;
}
/*
* We have to find the source device (PCI interrupt link device).
*/
if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, prt->Source, &lnkdev))) {
device_printf(pcib, "couldn't find PCI interrupt link device %s\n",
prt->Source);
goto out;
}
interrupt = acpi_pci_link_route_interrupt(acpi_get_device(lnkdev),
prt->SourceIndex);
if (bootverbose && PCI_INTERRUPT_VALID(interrupt))
device_printf(pcib, "slot %d INT%c routed to irq %d via %s\n",
pci_get_slot(dev), 'A' + pin, interrupt, acpi_name(lnkdev));
out:
ACPI_SERIAL_END(pcib);
return_VALUE(interrupt);
}
