freebsd-nq/sys/sparc64/pci/ofw_pci.c

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/*
* Copyright (c) 1999, 2000 Matthew R. Green
* All rights reserved.
* Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
* from: NetBSD: psycho.c,v 1.35 2001/09/10 16:17:06 eeh Exp
*
* $FreeBSD$
*/
#include "opt_ofw_pci.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/ofw/ofw_pci.h>
#include <dev/ofw/openfirm.h>
#include <sparc64/pci/ofw_pci.h>
#include <machine/ofw_bus.h>
#include <machine/ver.h>
#include "pcib_if.h"
u_int8_t pci_bus_cnt;
phandle_t *pci_bus_map;
int pci_bus_map_sz;
#define OPQ_NO_SWIZZLE 1
static struct ofw_pci_quirk {
char *opq_model;
int opq_quirks;
} ofw_pci_quirks[] = {
{ "SUNW,Ultra-4", OPQ_NO_SWIZZLE },
{ "SUNW,Ultra-1-Engine", OPQ_NO_SWIZZLE },
};
#define OPQ_NENT (sizeof(ofw_pci_quirks) / sizeof(ofw_pci_quirks[0]))
static int pci_quirks;
#define OFW_PCI_PCIBUS "pci"
#define PCI_BUS_MAP_INC 10
int
ofw_pci_orb_callback(phandle_t node, u_int8_t *pintptr, int pintsz,
u_int8_t *pregptr, int pregsz, u_int8_t **rintr, int *terminate)
{
struct ofw_pci_register preg;
u_int32_t pintr, intr;
char type[32];
if (pintsz != sizeof(u_int32_t))
return (-1);
bcopy(pintptr, &pintr, sizeof(pintr));
if ((pci_quirks & OPQ_NO_SWIZZLE) == 0 && pregsz >= sizeof(preg) &&
OF_getprop(node, "device_type", type, sizeof(type)) != -1 &&
strcmp(type, OFW_PCI_PCIBUS) == 0 && pintr >= 1 && pintr <= 4) {
/*
* Handle a quirk found on some Netra t1 models: there exist
* PCI bridges without interrupt maps, where we apparently must
* do the PCI swizzle and continue to map on at the parent.
*/
bcopy(pregptr, &preg, sizeof(preg));
intr = (OFW_PCI_PHYS_HI_DEVICE(preg.phys_hi) + pintr + 3) %
4 + 1;
*rintr = malloc(sizeof(intr), M_OFWPROP, M_WAITOK);
bcopy(&intr, *rintr, sizeof(intr));
*terminate = 0;
return (sizeof(intr));
}
return (-1);
}
u_int32_t
ofw_pci_route_intr(phandle_t node, u_int32_t ign)
{
u_int32_t rv;
rv = ofw_bus_route_intr(node, ORIP_NOINT, ofw_pci_orb_callback);
if (rv == ORIR_NOTFOUND)
return (255);
/*
* Some machines (notably the SPARCengine Ultra AX) have no mappings
* at all, but use complete interrupt vector number including the IGN.
* Catch this case and remove the IGN.
*/
if (rv > ign)
rv -= ign;
return (rv);
}
u_int8_t
ofw_pci_alloc_busno(phandle_t node)
{
phandle_t *om;
int osz;
u_int8_t n;
n = pci_bus_cnt++;
/* Establish a mapping between bus numbers and device nodes. */
if (n >= pci_bus_map_sz) {
osz = pci_bus_map_sz;
om = pci_bus_map;
pci_bus_map_sz = n + PCI_BUS_MAP_INC;
pci_bus_map = malloc(sizeof(*pci_bus_map) * pci_bus_map_sz,
M_DEVBUF, M_WAITOK | M_ZERO);
if (om != NULL) {
bcopy(om, pci_bus_map, sizeof(*om) * osz);
free(om, M_DEVBUF);
}
}
pci_bus_map[n] = node;
return (n);
}
/*
* Initialize bridge bus numbers for bridges that implement the primary,
* secondary and subordinate bus number registers.
*/
void
ofw_pci_binit(device_t busdev, struct ofw_pci_bdesc *obd)
{
#ifdef OFW_PCI_DEBUG
printf("PCI-PCI bridge at %u/%u/%u: setting bus #s to %u/%u/%u\n",
obd->obd_bus, obd->obd_slot, obd->obd_func, obd->obd_bus,
obd->obd_secbus, obd->obd_subbus);
#endif /* OFW_PCI_DEBUG */
PCIB_WRITE_CONFIG(busdev, obd->obd_bus, obd->obd_slot, obd->obd_func,
PCIR_PRIBUS_1, obd->obd_bus, 1);
PCIB_WRITE_CONFIG(busdev, obd->obd_bus, obd->obd_slot, obd->obd_func,
PCIR_SECBUS_1, obd->obd_secbus, 1);
PCIB_WRITE_CONFIG(busdev, obd->obd_bus, obd->obd_slot, obd->obd_func,
PCIR_SUBBUS_1, obd->obd_subbus, 1);
}
/*
* Walk the PCI bus hierarchy, starting with the root PCI bus and descending
* through bridges, and initialize the interrupt line and latency timer
* configuration registers of attached devices using firmware information,
* as well as the the bus numbers and ranges of the bridges.
*/
void
ofw_pci_init(device_t dev, phandle_t bushdl, u_int32_t ign,
struct ofw_pci_bdesc *obd)
{
struct ofw_pci_register pcir;
struct ofw_pci_bdesc subobd, *tobd;
phandle_t node;
char type[32];
int i, intr, freemap;
u_int slot, busno, func, sub, lat;
/* Initialize the quirk list. */
for (i = 0; i < OPQ_NENT; i++) {
if (strcmp(sparc64_model, ofw_pci_quirks[i].opq_model) == 0) {
pci_quirks = ofw_pci_quirks[i].opq_quirks;
break;
}
}
if ((node = OF_child(bushdl)) == 0)
return;
freemap = 0;
busno = obd->obd_secbus;
do {
if (node == -1)
panic("ofw_pci_init_intr: OF_child failed");
if (OF_getprop(node, "device_type", type, sizeof(type)) == -1)
type[0] = '\0';
else
type[sizeof(type) - 1] = '\0';
if (OF_getprop(node, "reg", &pcir, sizeof(pcir)) == -1)
panic("ofw_pci_init: OF_getprop failed");
slot = OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi);
func = OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi);
if (strcmp(type, OFW_PCI_PCIBUS) == 0) {
/*
* This is a pci-pci bridge, initalize the bus number and
* recurse to initialize the child bus. The hierarchy is
* usually at most 2 levels deep, so recursion is
* feasible.
*/
subobd.obd_bus = busno;
subobd.obd_slot = slot;
subobd.obd_func = func;
sub = ofw_pci_alloc_busno(node);
subobd.obd_secbus = subobd.obd_subbus = sub;
/* Assume this bridge is mostly standard conforming. */
subobd.obd_init = ofw_pci_binit;
subobd.obd_super = obd;
/*
* Need to change all subordinate bus registers of the
* bridges above this one now so that configuration
* transactions will get through.
*/
for (tobd = obd; tobd != NULL; tobd = tobd->obd_super) {
tobd->obd_subbus = sub;
tobd->obd_init(dev, tobd);
}
subobd.obd_init(dev, &subobd);
#ifdef OFW_PCI_DEBUG
device_printf(dev, "%s: descending to "
"subordinate PCI bus\n", __func__);
#endif /* OFW_PCI_DEBUG */
ofw_pci_init(dev, node, ign, &subobd);
} else {
/*
* Initialize the latency timer register for
* busmaster devices to work properly. This is another
* task which the firmware does not always perform.
* The Min_Gnt register can be used to compute it's
* recommended value: it contains the desired latency
* in units of 1/4 us. To calculate the correct latency
* timer value, a bus clock of 33 and no wait states
* should be assumed.
*/
lat = PCIB_READ_CONFIG(dev, busno, slot, func,
PCIR_MINGNT, 1) * 33 / 4;
if (lat != 0) {
#ifdef OFW_PCI_DEBUG
printf("device %d/%d/%d: latency timer %d -> "
"%d\n", busno, slot, func,
PCIB_READ_CONFIG(dev, busno, slot, func,
PCIR_LATTIMER, 1), lat);
#endif /* OFW_PCI_DEBUG */
PCIB_WRITE_CONFIG(dev, busno, slot, func,
PCIR_LATTIMER, imin(lat, 255), 1);
}
/* Initialize the intline registers. */
if ((intr = ofw_pci_route_intr(node, ign)) != 255) {
#ifdef OFW_PCI_DEBUG
device_printf(dev, "%s: mapping intr for "
"%d/%d/%d to %d (preset was %d)\n",
__func__, busno, slot, func, intr,
(int)PCIB_READ_CONFIG(dev, busno, slot,
func, PCIR_INTLINE, 1));
#endif /* OFW_PCI_DEBUG */
PCIB_WRITE_CONFIG(dev, busno, slot, func,
PCIR_INTLINE, intr, 1);
} else {
#ifdef OFW_PCI_DEBUG
device_printf(dev, "%s: no interrupt "
"mapping found for %d/%d/%d (preset %d)\n",
__func__, busno, slot, func,
(int)PCIB_READ_CONFIG(dev, busno, slot,
func, PCIR_INTLINE, 1));
#endif /* OFW_PCI_DEBUG */
/*
* The firmware initializes to 0 instead of
* 255.
*/
PCIB_WRITE_CONFIG(dev, busno, slot, func,
PCIR_INTLINE, 255, 1);
}
}
} while ((node = OF_peer(node)) != 0);
}
phandle_t
ofw_pci_find_node(int bus, int slot, int func)
{
phandle_t node, bnode;
struct ofw_pci_register pcir;
/*
* Retrieve the bus node from the mapping that was created on
* initialization. The bus numbers the firmware uses cannot be trusted,
* so they might have needed to be changed and this is necessary.
*/
if (bus >= pci_bus_map_sz)
return (0);
bnode = pci_bus_map[bus];
if (bnode == 0)
return (0);
for (node = OF_child(bnode); node != 0 && node != -1;
node = OF_peer(node)) {
if (OF_getprop(node, "reg", &pcir, sizeof(pcir)) == -1)
continue;
if (OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi) == slot &&
OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi) == func)
return (node);
}
return (0);
}
phandle_t
ofw_pci_node(device_t dev)
{
return (ofw_pci_find_node(pci_get_bus(dev), pci_get_slot(dev),
pci_get_function(dev)));
}