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/*-
* Copyright (c) 2011 Nathan Whitehorn
* 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/powerpc/ofw/ofw_pci.c 235060 2012-05-05 16:41:17Z nwhitehorn $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pci.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <machine/bus.h>
#include <machine/intr_machdep.h>
#include <machine/md_var.h>
#include <machine/pio.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <powerpc/ofw/ofw_pci.h>
#include "pcib_if.h"
/*
* Bus interface.
*/
static int ofw_pci_read_ivar(device_t, device_t, int,
uintptr_t *);
static struct resource * ofw_pci_alloc_resource(device_t bus,
device_t child, int type, int *rid, u_long start,
u_long end, u_long count, u_int flags);
static int ofw_pci_release_resource(device_t bus, device_t child,
int type, int rid, struct resource *res);
static int ofw_pci_activate_resource(device_t bus, device_t child,
int type, int rid, struct resource *res);
static int ofw_pci_deactivate_resource(device_t bus,
device_t child, int type, int rid,
struct resource *res);
static int ofw_pci_adjust_resource(device_t bus, device_t child,
int type, struct resource *res, u_long start,
u_long end);
/*
* pcib interface.
*/
static int ofw_pci_maxslots(device_t);
static int ofw_pci_route_interrupt(device_t, device_t, int);
/*
* ofw_bus interface
*/
static phandle_t ofw_pci_get_node(device_t bus, device_t dev);
/*
* local methods
*/
static int ofw_pci_nranges(phandle_t node);
static int ofw_pci_fill_ranges(phandle_t node, struct ofw_pci_range *ranges);
/*
* Driver methods.
*/
static device_method_t ofw_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_attach, ofw_pci_attach),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_read_ivar, ofw_pci_read_ivar),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_alloc_resource, ofw_pci_alloc_resource),
DEVMETHOD(bus_release_resource, ofw_pci_release_resource),
DEVMETHOD(bus_activate_resource, ofw_pci_activate_resource),
DEVMETHOD(bus_deactivate_resource, ofw_pci_deactivate_resource),
DEVMETHOD(bus_adjust_resource, ofw_pci_adjust_resource),
/* pcib interface */
DEVMETHOD(pcib_maxslots, ofw_pci_maxslots),
DEVMETHOD(pcib_route_interrupt, ofw_pci_route_interrupt),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_node, ofw_pci_get_node),
DEVMETHOD_END
};
DEFINE_CLASS_0(ofw_pci, ofw_pci_driver, ofw_pci_methods, 0);
int
ofw_pci_attach(device_t dev)
{
struct ofw_pci_softc *sc;
phandle_t node;
u_int32_t busrange[2];
struct ofw_pci_range *rp;
int error;
node = ofw_bus_get_node(dev);
sc = device_get_softc(dev);
if (OF_getprop(node, "reg", &sc->sc_pcir, sizeof(sc->sc_pcir)) == -1)
return (ENXIO);
if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
busrange[0] = 0;
sc->sc_dev = dev;
sc->sc_node = node;
sc->sc_bus = busrange[0];
if (sc->sc_quirks & OFW_PCI_QUIRK_RANGES_ON_CHILDREN) {
phandle_t c;
int n, i;
sc->sc_nrange = 0;
for (c = OF_child(node); c != 0; c = OF_peer(c)) {
n = ofw_pci_nranges(c);
if (n > 0)
sc->sc_nrange += n;
}
if (sc->sc_nrange == 0)
return (ENXIO);
sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]),
M_DEVBUF, M_WAITOK);
i = 0;
for (c = OF_child(node); c != 0; c = OF_peer(c)) {
n = ofw_pci_fill_ranges(c, &sc->sc_range[i]);
if (n > 0)
i += n;
}
KASSERT(i == sc->sc_nrange, ("range count mismatch"));
} else {
sc->sc_nrange = ofw_pci_nranges(node);
if (sc->sc_nrange <= 0) {
device_printf(dev, "could not get ranges\n");
return (ENXIO);
}
sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]),
M_DEVBUF, M_WAITOK);
ofw_pci_fill_ranges(node, sc->sc_range);
}
sc->sc_io_rman.rm_type = RMAN_ARRAY;
sc->sc_io_rman.rm_descr = "PCI I/O Ports";
error = rman_init(&sc->sc_io_rman);
if (error) {
device_printf(dev, "rman_init() failed. error = %d\n", error);
return (error);
}
sc->sc_mem_rman.rm_type = RMAN_ARRAY;
sc->sc_mem_rman.rm_descr = "PCI Memory";
error = rman_init(&sc->sc_mem_rman);
if (error) {
device_printf(dev, "rman_init() failed. error = %d\n", error);
return (error);
}
for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange &&
rp->pci_hi != 0; rp++) {
error = 0;
switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
case OFW_PCI_PHYS_HI_SPACE_CONFIG:
break;
case OFW_PCI_PHYS_HI_SPACE_IO:
error = rman_manage_region(&sc->sc_io_rman, rp->pci,
rp->pci + rp->size - 1);
break;
case OFW_PCI_PHYS_HI_SPACE_MEM32:
case OFW_PCI_PHYS_HI_SPACE_MEM64:
error = rman_manage_region(&sc->sc_mem_rman, rp->pci,
rp->pci + rp->size - 1);
break;
}
if (error) {
device_printf(dev,
"rman_manage_region(%x, %#jx, %#jx) failed. "
"error = %d\n", rp->pci_hi &
OFW_PCI_PHYS_HI_SPACEMASK, rp->pci,
rp->pci + rp->size - 1, error);
panic("AHOY");
return (error);
}
}
ofw_bus_setup_iinfo(node, &sc->sc_pci_iinfo, sizeof(cell_t));
device_add_child(dev, "pci", device_get_unit(dev));
return (bus_generic_attach(dev));
}
static int
ofw_pci_maxslots(device_t dev)
{
return (PCI_SLOTMAX);
}
static int
ofw_pci_route_interrupt(device_t bus, device_t dev, int pin)
{
struct ofw_pci_softc *sc;
struct ofw_pci_register reg;
uint32_t pintr, mintr;
phandle_t iparent;
uint8_t maskbuf[sizeof(reg) + sizeof(pintr)];
sc = device_get_softc(bus);
pintr = pin;
if (ofw_bus_lookup_imap(ofw_bus_get_node(dev), &sc->sc_pci_iinfo, ®,
sizeof(reg), &pintr, sizeof(pintr), &mintr, sizeof(mintr),
&iparent, maskbuf))
return (MAP_IRQ(iparent, mintr));
/* Maybe it's a real interrupt, not an intpin */
if (pin > 4)
return (pin);
device_printf(bus, "could not route pin %d for device %d.%d\n",
pin, pci_get_slot(dev), pci_get_function(dev));
return (PCI_INVALID_IRQ);
}
static int
ofw_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct ofw_pci_softc *sc;
sc = device_get_softc(dev);
switch (which) {
case PCIB_IVAR_DOMAIN:
*result = device_get_unit(dev);
return (0);
case PCIB_IVAR_BUS:
*result = sc->sc_bus;
return (0);
}
return (ENOENT);
}
static struct resource *
ofw_pci_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct ofw_pci_softc *sc;
struct resource *rv;
struct rman *rm;
int needactivate;
needactivate = flags & RF_ACTIVE;
flags &= ~RF_ACTIVE;
sc = device_get_softc(bus);
switch (type) {
case SYS_RES_MEMORY:
rm = &sc->sc_mem_rman;
break;
case SYS_RES_IOPORT:
rm = &sc->sc_io_rman;
break;
case SYS_RES_IRQ:
return (bus_alloc_resource(bus, type, rid, start, end, count,
flags));
default:
device_printf(bus, "unknown resource request from %s\n",
device_get_nameunit(child));
return (NULL);
}
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == NULL) {
device_printf(bus, "failed to reserve resource for %s\n",
device_get_nameunit(child));
return (NULL);
}
rman_set_rid(rv, *rid);
if (needactivate) {
if (bus_activate_resource(child, type, *rid, rv) != 0) {
device_printf(bus,
"failed to activate resource for %s\n",
device_get_nameunit(child));
rman_release_resource(rv);
return (NULL);
}
}
return (rv);
}
static int
ofw_pci_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
if (rman_get_flags(res) & RF_ACTIVE) {
int error = bus_deactivate_resource(child, type, rid, res);
if (error)
return error;
}
return (rman_release_resource(res));
}
static int
ofw_pci_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
struct ofw_pci_softc *sc;
void *p;
sc = device_get_softc(bus);
if (type == SYS_RES_IRQ) {
return (bus_activate_resource(bus, type, rid, res));
}
if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
struct ofw_pci_range *rp;
vm_offset_t start;
int space;
start = (vm_offset_t)rman_get_start(res);
/*
* Map this through the ranges list
*/
for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange &&
rp->pci_hi != 0; rp++) {
if (start < rp->pci || start >= rp->pci + rp->size)
continue;
switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
case OFW_PCI_PHYS_HI_SPACE_IO:
space = SYS_RES_IOPORT;
break;
case OFW_PCI_PHYS_HI_SPACE_MEM32:
case OFW_PCI_PHYS_HI_SPACE_MEM64:
space = SYS_RES_MEMORY;
break;
default:
space = -1;
}
if (type == space) {
start += (rp->host - rp->pci);
break;
}
}
if (bootverbose)
printf("ofw_pci mapdev: start %zx, len %ld\n", start,
rman_get_size(res));
p = pmap_mapdev(start, (vm_size_t)rman_get_size(res));
if (p == NULL)
return (ENOMEM);
rman_set_virtual(res, p);
rman_set_bustag(res, &bs_le_tag);
rman_set_bushandle(res, (u_long)p);
}
return (rman_activate_resource(res));
}
static int
ofw_pci_deactivate_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
/*
* If this is a memory resource, unmap it.
*/
if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
u_int32_t psize;
psize = rman_get_size(res);
pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize);
}
return (rman_deactivate_resource(res));
}
static int
ofw_pci_adjust_resource(device_t bus, device_t child, int type,
struct resource *res, u_long start, u_long end)
{
struct rman *rm = NULL;
struct ofw_pci_softc *sc = device_get_softc(bus);
KASSERT(!(rman_get_flags(res) & RF_ACTIVE),
("active resources cannot be adjusted"));
if (rman_get_flags(res) & RF_ACTIVE)
return (EINVAL);
switch (type) {
case SYS_RES_MEMORY:
rm = &sc->sc_mem_rman;
break;
case SYS_RES_IOPORT:
rm = &sc->sc_io_rman;
break;
default:
return (ENXIO);
}
if (!rman_is_region_manager(res, rm))
return (EINVAL);
return (rman_adjust_resource(res, start, end));
}
static phandle_t
ofw_pci_get_node(device_t bus, device_t dev)
{
struct ofw_pci_softc *sc;
sc = device_get_softc(bus);
/* We only have one child, the PCI bus, which needs our own node. */
return (sc->sc_node);
}
static int
ofw_pci_nranges(phandle_t node)
{
int host_address_cells = 1, pci_address_cells = 3, size_cells = 2;
ssize_t nbase_ranges;
OF_getprop(OF_parent(node), "#address-cells", &host_address_cells,
sizeof(host_address_cells));
OF_getprop(node, "#address-cells", &pci_address_cells,
sizeof(pci_address_cells));
OF_getprop(node, "#size-cells", &size_cells, sizeof(size_cells));
nbase_ranges = OF_getproplen(node, "ranges");
if (nbase_ranges <= 0)
return (-1);
return (nbase_ranges / sizeof(cell_t) /
(pci_address_cells + host_address_cells + size_cells));
}
static int
ofw_pci_fill_ranges(phandle_t node, struct ofw_pci_range *ranges)
{
int host_address_cells = 1, pci_address_cells = 3, size_cells = 2;
cell_t *base_ranges;
ssize_t nbase_ranges;
int nranges;
int i, j, k;
OF_getprop(OF_parent(node), "#address-cells", &host_address_cells,
sizeof(host_address_cells));
OF_getprop(node, "#address-cells", &pci_address_cells,
sizeof(pci_address_cells));
OF_getprop(node, "#size-cells", &size_cells, sizeof(size_cells));
nbase_ranges = OF_getproplen(node, "ranges");
if (nbase_ranges <= 0)
return (-1);
nranges = nbase_ranges / sizeof(cell_t) /
(pci_address_cells + host_address_cells + size_cells);
base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK);
OF_getprop(node, "ranges", base_ranges, nbase_ranges);
for (i = 0, j = 0; i < nranges; i++) {
ranges[i].pci_hi = base_ranges[j++];
ranges[i].pci = 0;
for (k = 0; k < pci_address_cells - 1; k++) {
ranges[i].pci <<= 32;
ranges[i].pci |= base_ranges[j++];
}
ranges[i].host = 0;
for (k = 0; k < host_address_cells; k++) {
ranges[i].host <<= 32;
ranges[i].host |= base_ranges[j++];
}
ranges[i].size = 0;
for (k = 0; k < size_cells; k++) {
ranges[i].size <<= 32;
ranges[i].size |= base_ranges[j++];
}
}
free(base_ranges, M_DEVBUF);
return (nranges);
}