FreeBSD-5.3/sys/dev/acpica/acpi_pcib.c
/*-
* Copyright (c) 2000 Michael Smith
* Copyright (c) 2000 BSDi
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/acpica/acpi_pcib.c,v 1.50 2004/08/13 06:22:07 njl Exp $");
#include "opt_acpi.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpi_pcibvar.h>
#include <dev/pci/pcivar.h>
#include "pcib_if.h"
/* Hooks for the ACPI CA debugging infrastructure. */
#define _COMPONENT ACPI_BUS
ACPI_MODULE_NAME("PCI")
ACPI_SERIAL_DECL(pcib, "ACPI PCI bus methods");
/*
* For locking, we assume the caller is not concurrent since this is
* triggered by newbus methods.
*/
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__);
/*
* 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.
*/
prt->Length = ACPI_ALLOCATE_BUFFER;
status = AcpiGetIrqRoutingTable(acpi_get_handle(dev), prt);
if (ACPI_FAILURE(status))
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.
*/
acpi_pci_link_config(dev, prt, busno);
return_VALUE (bus_generic_attach(dev));
}
int
acpi_pcib_resume(device_t dev)
{
acpi_pci_link_resume(dev);
return (bus_generic_resume(dev));
}
/*
* Route an interrupt for a child of the bridge.
*/
int
acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin)
{
struct acpi_prt_entry *entry;
int i, interrupt;
struct acpi_pci_link_entry *link;
ACPI_PCI_ROUTING_TABLE *prt;
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);
/* Look up the PRT entry for this device. */
entry = acpi_pci_find_prt(pcib, dev, pin);
if (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 = &entry->prt;
link = entry->pci_link;
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[0] != '\0')
printf(" (src %s)", acpi_name(entry->prt_source));
printf("\n");
}
/*
* If source is empty/NULL, the source index is a global IRQ number
* and it's hard-wired so we're done.
*/
if (prt->Source == NULL || prt->Source[0] == '\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;
else
device_printf(pcib, "error: invalid hard-wired IRQ of 0\n");
goto out;
}
/* XXX Support for multiple resources must be added to the link code. */
if (prt->SourceIndex) {
device_printf(pcib, "src index %d not yet supported\n",
prt->SourceIndex);
goto out;
}
/* There has to be at least one interrupt available. */
if (link->number_of_interrupts == 0) {
device_printf(pcib, "device has no interrupts\n");
goto out;
}
/*
* If the current interrupt has been routed, we're done. This is the
* case when the BIOS initializes it and we didn't disable it.
*/
if (link->flags & ACPI_LINK_ROUTED) {
interrupt = link->current_irq;
if (bootverbose)
device_printf(pcib, "slot %d INT%c is already routed to irq %d\n",
pci_get_slot(dev), 'A' + pin, interrupt);
goto out;
}
if (bootverbose) {
device_printf(pcib, "possible interrupts:");
for (i = 0; i < link->number_of_interrupts; i++)
printf("%3d", link->interrupts[i]);
printf("\n");
}
/*
* Perform the link routing. The link code will pick the best IRQ
* for this pin and configure it.
*/
interrupt = acpi_pci_link_route(dev, entry);
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(entry->prt_source));
out:
ACPI_SERIAL_END(pcib);
return_VALUE (interrupt);
}