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/*-
* 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: release/9.1.0/sys/dev/acpica/acpi_pcib_acpi.c 234150 2012-04-11 20:50:17Z jhb $");
#include "opt_acpi.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.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; /* PCI domain */
int ap_bus; /* bios-assigned bus number */
int ap_addr; /* device/func of PCI-Host bridge */
ACPI_BUFFER ap_prt; /* interrupt routing table */
#ifdef NEW_PCIB
struct pcib_host_resources ap_host_res;
#endif
};
static int acpi_pcib_acpi_probe(device_t bus);
static int acpi_pcib_acpi_attach(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, u_int bus,
u_int slot, u_int func, u_int reg, int bytes);
static void acpi_pcib_write_config(device_t dev, u_int bus,
u_int slot, u_int func, u_int reg, uint32_t data,
int bytes);
static int acpi_pcib_acpi_route_interrupt(device_t pcib,
device_t dev, int pin);
static int acpi_pcib_alloc_msi(device_t pcib, device_t dev,
int count, int maxcount, int *irqs);
static int acpi_pcib_map_msi(device_t pcib, device_t dev,
int irq, uint64_t *addr, uint32_t *data);
static int acpi_pcib_alloc_msix(device_t pcib, device_t dev,
int *irq);
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);
#ifdef NEW_PCIB
static int acpi_pcib_acpi_adjust_resource(device_t dev,
device_t child, int type, struct resource *r,
u_long start, u_long end);
#endif
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, bus_generic_resume),
/* Bus interface */
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),
#ifdef NEW_PCIB
DEVMETHOD(bus_adjust_resource, acpi_pcib_acpi_adjust_resource),
#else
DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
#endif
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),
DEVMETHOD(pcib_alloc_msi, acpi_pcib_alloc_msi),
DEVMETHOD(pcib_release_msi, pcib_release_msi),
DEVMETHOD(pcib_alloc_msix, acpi_pcib_alloc_msix),
DEVMETHOD(pcib_release_msix, pcib_release_msix),
DEVMETHOD(pcib_map_msi, acpi_pcib_map_msi),
DEVMETHOD(pcib_power_for_sleep, acpi_pcib_power_for_sleep),
DEVMETHOD_END
};
static devclass_t pcib_devclass;
DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, 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)
{
ACPI_DEVICE_INFO *devinfo;
ACPI_HANDLE h;
int root;
if (acpi_disabled("pcib") || (h = acpi_get_handle(dev)) == NULL ||
ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
return (ENXIO);
root = (devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0;
AcpiOsFree(devinfo);
if (!root || pci_cfgregopen() == 0)
return (ENXIO);
device_set_desc(dev, "ACPI Host-PCI bridge");
return (0);
}
#ifdef NEW_PCIB
static ACPI_STATUS
acpi_pcib_producer_handler(ACPI_RESOURCE *res, void *context)
{
struct acpi_hpcib_softc *sc;
UINT64 length, min, max;
u_int flags;
int error, type;
sc = context;
switch (res->Type) {
case ACPI_RESOURCE_TYPE_START_DEPENDENT:
case ACPI_RESOURCE_TYPE_END_DEPENDENT:
panic("host bridge has depenedent resources");
case ACPI_RESOURCE_TYPE_ADDRESS16:
case ACPI_RESOURCE_TYPE_ADDRESS32:
case ACPI_RESOURCE_TYPE_ADDRESS64:
case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
if (res->Data.Address.ProducerConsumer != ACPI_PRODUCER)
break;
switch (res->Type) {
case ACPI_RESOURCE_TYPE_ADDRESS16:
min = res->Data.Address16.Minimum;
max = res->Data.Address16.Maximum;
length = res->Data.Address16.AddressLength;
break;
case ACPI_RESOURCE_TYPE_ADDRESS32:
min = res->Data.Address32.Minimum;
max = res->Data.Address32.Maximum;
length = res->Data.Address32.AddressLength;
break;
case ACPI_RESOURCE_TYPE_ADDRESS64:
min = res->Data.Address64.Minimum;
max = res->Data.Address64.Maximum;
length = res->Data.Address64.AddressLength;
break;
default:
KASSERT(res->Type ==
ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64,
("should never happen"));
min = res->Data.ExtAddress64.Minimum;
max = res->Data.ExtAddress64.Maximum;
length = res->Data.ExtAddress64.AddressLength;
break;
}
if (length == 0)
break;
if (min + length - 1 != max &&
(res->Data.Address.MinAddressFixed != ACPI_ADDRESS_FIXED ||
res->Data.Address.MaxAddressFixed != ACPI_ADDRESS_FIXED))
break;
flags = 0;
switch (res->Data.Address.ResourceType) {
case ACPI_MEMORY_RANGE:
type = SYS_RES_MEMORY;
if (res->Type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) {
if (res->Data.Address.Info.Mem.Caching ==
ACPI_PREFETCHABLE_MEMORY)
flags |= RF_PREFETCHABLE;
} else {
/*
* XXX: Parse prefetch flag out of
* TypeSpecific.
*/
}
break;
case ACPI_IO_RANGE:
type = SYS_RES_IOPORT;
break;
#ifdef PCI_RES_BUS
case ACPI_BUS_NUMBER_RANGE:
type = PCI_RES_BUS;
break;
#endif
default:
return (AE_OK);
}
if (min + length - 1 != max)
device_printf(sc->ap_dev,
"Length mismatch for %d range: %jx vs %jx\n", type,
(uintmax_t)max - min + 1, (uintmax_t)length);
#ifdef __i386__
if (min > ULONG_MAX) {
device_printf(sc->ap_dev,
"Ignoring %d range above 4GB (%#jx-%#jx)\n",
type, (uintmax_t)min, (uintmax_t)max);
break;
}
if (max > ULONG_MAX) {
device_printf(sc->ap_dev,
"Truncating end of %d range above 4GB (%#jx-%#jx)\n",
type, (uintmax_t)min, (uintmax_t)max);
max = ULONG_MAX;
}
#endif
error = pcib_host_res_decodes(&sc->ap_host_res, type, min, max,
flags);
if (error)
panic("Failed to manage %d range (%#jx-%#jx): %d",
type, (uintmax_t)min, (uintmax_t)max, error);
break;
default:
break;
}
return (AE_OK);
}
#endif
static int
acpi_pcib_acpi_attach(device_t dev)
{
struct acpi_hpcib_softc *sc;
ACPI_STATUS status;
static int bus0_seen = 0;
u_int 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 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;
}
/*
* Get the address (device and function) of the associated
* PCI-Host bridge device from _ADR. Assume we don't have one if
* it doesn't exist.
*/
status = acpi_GetInteger(sc->ap_handle, "_ADR", &sc->ap_addr);
if (ACPI_FAILURE(status)) {
device_printf(dev, "could not evaluate _ADR - %s\n",
AcpiFormatException(status));
sc->ap_addr = -1;
}
#ifdef NEW_PCIB
/*
* Determine which address ranges this bridge decodes and setup
* resource managers for those ranges.
*/
if (pcib_host_res_init(sc->ap_dev, &sc->ap_host_res) != 0)
panic("failed to init hostb resources");
if (!acpi_disabled("hostres")) {
status = AcpiWalkResources(sc->ap_handle, "_CRS",
acpi_pcib_producer_handler, sc);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
device_printf(sc->ap_dev, "failed to parse resources: %s\n",
AcpiFormatException(status));
}
#endif
/*
* 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 PCI bus 0 already exists, we try to read our
* bus number from the configuration registers at address _ADR.
* We only do this for domain/segment 0 in the hopes that this is
* only needed for old single-domain machines.
*/
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 this is segment 0, the bus is zero, and PCI bus 0 already
* exists, read the bus number via PCI config space.
*/
busok = 1;
if (sc->ap_segment == 0 && sc->ap_bus == 0 && bus0_seen) {
busok = 0;
if (sc->ap_addr != -1) {
/* XXX: We assume bus 0. */
slot = ACPI_ADR_PCI_SLOT(sc->ap_addr);
func = ACPI_ADR_PCI_FUNC(sc->ap_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);
}
/* If this is bus 0 on segment 0, note that it has been seen already. */
if (sc->ap_segment == 0 && sc->ap_bus == 0)
bus0_seen = 1;
return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
}
/*
* 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_DOMAIN:
*result = sc->ap_segment;
return (0);
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_DOMAIN:
return (EINVAL);
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, u_int bus, u_int slot, u_int func,
u_int reg, int bytes)
{
return (pci_cfgregread(bus, slot, func, reg, bytes));
}
static void
acpi_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func,
u_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)
{
struct acpi_hpcib_softc *sc = device_get_softc(pcib);
return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
}
static int
acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
int *irqs)
{
device_t bus;
bus = device_get_parent(pcib);
return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
irqs));
}
static int
acpi_pcib_alloc_msix(device_t pcib, device_t dev, int *irq)
{
device_t bus;
bus = device_get_parent(pcib);
return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
}
static int
acpi_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
uint32_t *data)
{
struct acpi_hpcib_softc *sc;
device_t bus, hostb;
int error;
bus = device_get_parent(pcib);
error = PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data);
if (error)
return (error);
sc = device_get_softc(dev);
if (sc->ap_addr == -1)
return (0);
/* XXX: Assumes all bridges are on bus 0. */
hostb = pci_find_dbsf(sc->ap_segment, 0, ACPI_ADR_PCI_SLOT(sc->ap_addr),
ACPI_ADR_PCI_FUNC(sc->ap_addr));
if (hostb != NULL)
pci_ht_map_msi(hostb, *addr);
return (0);
}
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)
{
#ifdef NEW_PCIB
struct acpi_hpcib_softc *sc;
struct resource *res;
#endif
#if defined(__i386__) || defined(__amd64__)
start = hostb_alloc_start(type, start, end, count);
#endif
#ifdef NEW_PCIB
sc = device_get_softc(dev);
res = pcib_host_res_alloc(&sc->ap_host_res, child, type, rid, start, end,
count, flags);
/*
* XXX: If this is a request for a specific range, assume it is
* correct and pass it up to the parent. What we probably want to
* do long-term is explicitly trust any firmware-configured
* resources during the initial bus scan on boot and then disable
* this after that.
*/
if (res == NULL && start + count - 1 == end)
res = bus_generic_alloc_resource(dev, child, type, rid, start, end,
count, flags);
return (res);
#else
return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
count, flags));
#endif
}
#ifdef NEW_PCIB
int
acpi_pcib_acpi_adjust_resource(device_t dev, device_t child, int type,
struct resource *r, u_long start, u_long end)
{
struct acpi_hpcib_softc *sc;
sc = device_get_softc(dev);
return (pcib_host_res_adjust(&sc->ap_host_res, child, type, r, start,
end));
}
#endif