325 lines
10 KiB
C
325 lines
10 KiB
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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#include "opt_acpi.h"
|
|
#include <sys/param.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/module.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include "acpi.h"
|
|
#include <dev/acpica/acpivar.h>
|
|
|
|
#include <machine/pci_cfgreg.h>
|
|
#include <dev/pci/pcivar.h>
|
|
#include <dev/pci/pcib_private.h>
|
|
#include "pcib_if.h"
|
|
|
|
#include <dev/acpica/acpi_pcibvar.h>
|
|
|
|
/* Hooks for the ACPI CA debugging infrastructure. */
|
|
#define _COMPONENT ACPI_BUS
|
|
ACPI_MODULE_NAME("PCI_ACPI")
|
|
|
|
struct acpi_hpcib_softc {
|
|
device_t ap_dev;
|
|
ACPI_HANDLE ap_handle;
|
|
int ap_flags;
|
|
|
|
int ap_segment; /* analagous to Alpha 'hose' */
|
|
int ap_bus; /* bios-assigned bus number */
|
|
|
|
ACPI_BUFFER ap_prt; /* interrupt routing table */
|
|
};
|
|
|
|
static int acpi_pcib_acpi_probe(device_t bus);
|
|
static int acpi_pcib_acpi_attach(device_t bus);
|
|
static int acpi_pcib_acpi_resume(device_t bus);
|
|
static int acpi_pcib_read_ivar(device_t dev, device_t child,
|
|
int which, uintptr_t *result);
|
|
static int acpi_pcib_write_ivar(device_t dev, device_t child,
|
|
int which, uintptr_t value);
|
|
static uint32_t acpi_pcib_read_config(device_t dev, int bus, int slot,
|
|
int func, int reg, int bytes);
|
|
static void acpi_pcib_write_config(device_t dev, int bus, int slot,
|
|
int func, int reg, uint32_t data, int bytes);
|
|
static int acpi_pcib_acpi_route_interrupt(device_t pcib,
|
|
device_t dev, int pin);
|
|
static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
|
|
device_t child, int type, int *rid,
|
|
u_long start, u_long end, u_long count,
|
|
u_int flags);
|
|
|
|
static device_method_t acpi_pcib_acpi_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, acpi_pcib_acpi_probe),
|
|
DEVMETHOD(device_attach, acpi_pcib_acpi_attach),
|
|
DEVMETHOD(device_shutdown, bus_generic_shutdown),
|
|
DEVMETHOD(device_suspend, bus_generic_suspend),
|
|
DEVMETHOD(device_resume, acpi_pcib_acpi_resume),
|
|
|
|
/* Bus interface */
|
|
DEVMETHOD(bus_print_child, bus_generic_print_child),
|
|
DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
|
|
DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar),
|
|
DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource),
|
|
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
|
|
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
|
|
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
|
|
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
|
|
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
|
|
|
|
/* pcib interface */
|
|
DEVMETHOD(pcib_maxslots, pcib_maxslots),
|
|
DEVMETHOD(pcib_read_config, acpi_pcib_read_config),
|
|
DEVMETHOD(pcib_write_config, acpi_pcib_write_config),
|
|
DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt),
|
|
|
|
{0, 0}
|
|
};
|
|
|
|
static driver_t acpi_pcib_acpi_driver = {
|
|
"pcib",
|
|
acpi_pcib_acpi_methods,
|
|
sizeof(struct acpi_hpcib_softc),
|
|
};
|
|
|
|
DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
|
|
MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
|
|
|
|
static int
|
|
acpi_pcib_acpi_probe(device_t dev)
|
|
{
|
|
static char *pcib_ids[] = { "PNP0A03", NULL };
|
|
|
|
if (acpi_disabled("pcib") ||
|
|
ACPI_ID_PROBE(device_get_parent(dev), dev, pcib_ids) == NULL)
|
|
return (ENXIO);
|
|
|
|
if (pci_cfgregopen() == 0)
|
|
return (ENXIO);
|
|
device_set_desc(dev, "ACPI Host-PCI bridge");
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
acpi_pcib_acpi_attach(device_t dev)
|
|
{
|
|
struct acpi_hpcib_softc *sc;
|
|
ACPI_STATUS status;
|
|
u_int addr, slot, func, busok;
|
|
uint8_t busno;
|
|
|
|
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->ap_dev = dev;
|
|
sc->ap_handle = acpi_get_handle(dev);
|
|
|
|
/*
|
|
* Get our base bus number by evaluating _BBN.
|
|
* If this doesn't work, we assume we're bus number 0.
|
|
*
|
|
* XXX note that it may also not exist in the case where we are
|
|
* meant to use a private configuration space mechanism for this bus,
|
|
* so we should dig out our resources and check to see if we have
|
|
* anything like that. How do we do this?
|
|
* XXX If we have the requisite information, and if we don't think the
|
|
* default PCI configuration space handlers can deal with this bus,
|
|
* we should attach our own handler.
|
|
* XXX invoke _REG on this for the PCI config space address space?
|
|
* XXX It seems many BIOS's with multiple Host-PCI bridges do not set
|
|
* _BBN correctly. They set _BBN to zero for all bridges. Thus,
|
|
* if _BBN is zero and pcib0 already exists, we try to read our
|
|
* bus number from the configuration registers at address _ADR.
|
|
*/
|
|
status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
|
|
if (ACPI_FAILURE(status)) {
|
|
if (status != AE_NOT_FOUND) {
|
|
device_printf(dev, "could not evaluate _BBN - %s\n",
|
|
AcpiFormatException(status));
|
|
return_VALUE (ENXIO);
|
|
} else {
|
|
/* If it's not found, assume 0. */
|
|
sc->ap_bus = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the bus is zero and pcib0 already exists, read the bus number
|
|
* via PCI config space.
|
|
*/
|
|
busok = 1;
|
|
if (sc->ap_bus == 0 && devclass_get_device(pcib_devclass, 0) != dev) {
|
|
busok = 0;
|
|
status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr);
|
|
if (ACPI_FAILURE(status)) {
|
|
if (status != AE_NOT_FOUND) {
|
|
device_printf(dev, "could not evaluate _ADR - %s\n",
|
|
AcpiFormatException(status));
|
|
return_VALUE (ENXIO);
|
|
} else
|
|
device_printf(dev, "couldn't find _ADR\n");
|
|
} else {
|
|
/* XXX: We assume bus 0. */
|
|
slot = ACPI_ADR_PCI_SLOT(addr);
|
|
func = ACPI_ADR_PCI_FUNC(addr);
|
|
if (bootverbose)
|
|
device_printf(dev, "reading config registers from 0:%d:%d\n",
|
|
slot, func);
|
|
if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
|
|
device_printf(dev, "couldn't read bus number from cfg space\n");
|
|
else {
|
|
sc->ap_bus = busno;
|
|
busok = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If nothing else worked, hope that ACPI at least lays out the
|
|
* host-PCI bridges in order and that as a result our unit number
|
|
* is actually our bus number. There are several reasons this
|
|
* might not be true.
|
|
*/
|
|
if (busok == 0) {
|
|
sc->ap_bus = device_get_unit(dev);
|
|
device_printf(dev, "trying bus number %d\n", sc->ap_bus);
|
|
}
|
|
|
|
/*
|
|
* Get our segment number by evaluating _SEG
|
|
* It's OK for this to not exist.
|
|
*/
|
|
status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
|
|
if (ACPI_FAILURE(status)) {
|
|
if (status != AE_NOT_FOUND) {
|
|
device_printf(dev, "could not evaluate _SEG - %s\n",
|
|
AcpiFormatException(status));
|
|
return_VALUE (ENXIO);
|
|
}
|
|
/* If it's not found, assume 0. */
|
|
sc->ap_segment = 0;
|
|
}
|
|
|
|
return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
|
|
}
|
|
|
|
static int
|
|
acpi_pcib_acpi_resume(device_t dev)
|
|
{
|
|
|
|
return (acpi_pcib_resume(dev));
|
|
}
|
|
|
|
/*
|
|
* Support for standard PCI bridge ivars.
|
|
*/
|
|
static int
|
|
acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
|
|
{
|
|
struct acpi_hpcib_softc *sc = device_get_softc(dev);
|
|
|
|
switch (which) {
|
|
case PCIB_IVAR_BUS:
|
|
*result = sc->ap_bus;
|
|
return (0);
|
|
case ACPI_IVAR_HANDLE:
|
|
*result = (uintptr_t)sc->ap_handle;
|
|
return (0);
|
|
case ACPI_IVAR_FLAGS:
|
|
*result = (uintptr_t)sc->ap_flags;
|
|
return (0);
|
|
}
|
|
return (ENOENT);
|
|
}
|
|
|
|
static int
|
|
acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
|
|
{
|
|
struct acpi_hpcib_softc *sc = device_get_softc(dev);
|
|
|
|
switch (which) {
|
|
case PCIB_IVAR_BUS:
|
|
sc->ap_bus = value;
|
|
return (0);
|
|
case ACPI_IVAR_HANDLE:
|
|
sc->ap_handle = (ACPI_HANDLE)value;
|
|
return (0);
|
|
case ACPI_IVAR_FLAGS:
|
|
sc->ap_flags = (int)value;
|
|
return (0);
|
|
}
|
|
return (ENOENT);
|
|
}
|
|
|
|
static uint32_t
|
|
acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg,
|
|
int bytes)
|
|
{
|
|
return (pci_cfgregread(bus, slot, func, reg, bytes));
|
|
}
|
|
|
|
static void
|
|
acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg,
|
|
uint32_t data, int bytes)
|
|
{
|
|
pci_cfgregwrite(bus, slot, func, reg, data, bytes);
|
|
}
|
|
|
|
static int
|
|
acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
|
|
{
|
|
|
|
return (acpi_pcib_route_interrupt(pcib, dev, pin));
|
|
}
|
|
|
|
static u_long acpi_host_mem_start = 0x80000000;
|
|
TUNABLE_ULONG("hw.acpi.host_mem_start", &acpi_host_mem_start);
|
|
|
|
struct resource *
|
|
acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
|
|
u_long start, u_long end, u_long count, u_int flags)
|
|
{
|
|
/*
|
|
* If no memory preference is given, use upper 32MB slot most
|
|
* bioses use for their memory window. Typically other bridges
|
|
* before us get in the way to assert their preferences on memory.
|
|
* Hardcoding like this sucks, so a more MD/MI way needs to be
|
|
* found to do it. This is typically only used on older laptops
|
|
* that don't have pci busses behind pci bridge, so assuming > 32MB
|
|
* is liekly OK.
|
|
*/
|
|
if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL)
|
|
start = acpi_host_mem_start;
|
|
return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
|
|
count, flags));
|
|
}
|