freebsd-dev/sys/dev/acpica/acpi_pci.c

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/*
* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
* Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
* 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 unmodified, 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 ``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 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.
*
* $FreeBSD$
*
*/
#include "opt_bus.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include <sys/pciio.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pci_private.h>
#include "pcib_if.h"
#include "pci_if.h"
/*
* Hooks for the ACPI CA debugging infrastructure
*/
#define _COMPONENT ACPI_BUS
ACPI_MODULE_NAME("PCI")
struct acpi_pci_devinfo {
struct pci_devinfo ap_dinfo;
ACPI_HANDLE ap_handle;
};
static int acpi_pci_probe(device_t dev);
static int acpi_pci_attach(device_t dev);
static int acpi_pci_read_ivar(device_t dev, device_t child, int which,
uintptr_t *result);
#if 0
static int acpi_pci_set_powerstate_method(device_t dev, device_t child,
int state);
static int acpi_pci_get_powerstate_method(device_t dev, device_t child);
#endif
static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
void *context, void **status);
static device_method_t acpi_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, acpi_pci_probe),
DEVMETHOD(device_attach, acpi_pci_attach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, pci_print_child),
DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch),
DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar),
DEVMETHOD(bus_write_ivar, pci_write_ivar),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
DEVMETHOD(bus_delete_resource, pci_delete_resource),
DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
/* PCI interface */
DEVMETHOD(pci_read_config, pci_read_config_method),
DEVMETHOD(pci_write_config, pci_write_config_method),
DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
DEVMETHOD(pci_enable_io, pci_enable_io_method),
DEVMETHOD(pci_disable_io, pci_disable_io_method),
/* XXX: We should override these two. */
DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method),
{ 0, 0 }
};
static driver_t acpi_pci_driver = {
"pci",
acpi_pci_methods,
0, /* no softc */
};
DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
MODULE_VERSION(acpi_pci, 1);
MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
static int
acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct acpi_pci_devinfo *dinfo;
switch (which) {
case ACPI_IVAR_HANDLE:
dinfo = device_get_ivars(child);
*result = (uintptr_t)dinfo->ap_handle;
return(0);
}
return(pci_read_ivar(dev, child, which, result));
}
#if 0
/*
* PCI power manangement
*/
static int
acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
{
/* XXX: TODO */
return (ENXIO);
}
static int
acpi_pci_get_powerstate_method(device_t dev, device_t child)
{
/* XXX: TODO */
return (ENXIO);
}
#endif
static ACPI_STATUS
acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
void **status)
{
struct acpi_pci_devinfo *dinfo;
device_t *devlist;
int devcount, i, func, slot;
UINT32 address;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (ACPI_FAILURE(acpi_EvaluateInteger(handle, "_ADR", &address)))
return_ACPI_STATUS(AE_OK);
slot = address >> 16;
func = address & 0xffff;
if (device_get_children((device_t)context, &devlist, &devcount) != 0)
return_ACPI_STATUS(AE_OK);
for (i = 0; i < devcount; i++) {
dinfo = device_get_ivars(devlist[i]);
if (dinfo->ap_dinfo.cfg.func == func &&
dinfo->ap_dinfo.cfg.slot == slot) {
dinfo->ap_handle = handle;
free(devlist, M_TEMP);
return_ACPI_STATUS(AE_OK);
}
}
free(devlist, M_TEMP);
return_ACPI_STATUS(AE_OK);
}
static int
acpi_pci_probe(device_t dev)
{
if (pcib_get_bus(dev) < 0)
return (ENXIO);
device_set_desc(dev, "ACPI PCI bus");
if (acpi_get_handle(dev) == NULL)
return (ENXIO);
return (0);
}
static int
acpi_pci_attach(device_t dev)
{
int busno;
/*
* Since there can be multiple independantly numbered PCI
* busses on some large alpha systems, we can't use the unit
* number to decide what bus we are probing. We ask the parent
* pcib what our bus number is.
*/
busno = pcib_get_bus(dev);
if (bootverbose)
device_printf(dev, "physical bus=%d\n", busno);
/*
* First, PCI devices are added as in the normal PCI bus driver.
* Afterwards, the ACPI namespace under the bridge driver is
* walked to save ACPI handles to all the devices that appear in
* the ACPI namespace as immediate descendants of the bridge.
*
* XXX: Sometimes PCI devices show up in the ACPI namespace that
* pci_add_children() doesn't find. We currently just ignore
* these devices.
*/
pci_add_children(dev, busno, sizeof(struct acpi_pci_devinfo));
(void) AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
acpi_pci_save_handle, dev, NULL);
return (bus_generic_attach(dev));
}