/* $NetBSD: pci_machdep.c,v 1.79 2022/10/01 07:59:25 charlotte Exp $ */
/*
* Copyright (c) 1999, 2000 Matthew R. Green
* 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 ``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.
*/
/*
* functions expected by the MI PCI code.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.79 2022/10/01 07:59:25 charlotte Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/malloc.h>
#define _SPARC_BUS_DMA_PRIVATE
#include <sys/bus.h>
#include <machine/autoconf.h>
#include <machine/openfirm.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/ofw/ofw_pci.h>
#include <sparc64/dev/iommureg.h>
#include <sparc64/sparc64/cache.h>
#include "locators.h"
#ifdef DEBUG
#define SPDB_CONF 0x01
#define SPDB_INTR 0x04
#define SPDB_INTMAP 0x08
#define SPDB_PROBE 0x20
#define SPDB_TAG 0x40
int sparc_pci_debug = 0x0;
#define DPRINTF(l, s) do { if (sparc_pci_debug & l) printf s; } while (0)
#else
#define DPRINTF(l, s)
#endif
/* this is a base to be copied */
struct sparc_pci_chipset _sparc_pci_chipset = {
.cookie = NULL,
};
static pcitag_t
ofpci_make_tag(pci_chipset_tag_t pc, int node, int b, int d, int f)
{
pcitag_t tag;
pcireg_t reg;
tag = PCITAG_CREATE(node, b, d, f);
DPRINTF(SPDB_TAG,
("%s: creating tag for node %x bus %d dev %d fn %d\n",
__func__, node, b, d, f));
/* Enable all the different spaces for this device */
reg = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
reg |= PCI_COMMAND_MEM_ENABLE|PCI_COMMAND_MASTER_ENABLE|
PCI_COMMAND_IO_ENABLE;
pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, reg);
return (tag);
}
/*
* functions provided to the MI code.
*/
void
pci_attach_hook(device_t parent, device_t self,
struct pcibus_attach_args *pba)
{
}
int
pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
{
return 32;
}
pcitag_t
pci_make_tag(pci_chipset_tag_t pc, int b, int d, int f)
{
struct ofw_pci_register reg;
pcitag_t tag;
int (*valid)(void *);
int node, new_node, len;
#ifdef DEBUG
char name[80];
memset(name, 0, sizeof(name));
#endif
/*
* Refer to the PCI/CardBus bus node first.
* It returns a tag if node is present and bus is valid.
*/
if (0 <= b && b < 256) {
KASSERT(pc->spc_busnode != NULL);
node = (*pc->spc_busnode)[b].node;
valid = (*pc->spc_busnode)[b].valid;
if (node != 0 && d == 0 &&
(valid == NULL || (*valid)((*pc->spc_busnode)[b].arg)))
return ofpci_make_tag(pc, node, b, d, f);
}
/*
* Hunt for the node that corresponds to this device
*
* We could cache this info in an array in the parent
* device... except then we have problems with devices
* attached below pci-pci bridges, and we would need to
* add special code to the pci-pci bridge to cache this
* info.
*/
tag = PCITAG_CREATE(-1, b, d, f);
node = pc->rootnode;
/*
* First make sure we're on the right bus. If our parent
* has a bus-range property and we're not in the range,
* then we're obviously on the wrong bus. So go up one
* level.
*/
DPRINTF(SPDB_PROBE, ("curnode %x %s\n", node,
prom_getpropstringA(node, "name", name, sizeof(name))));
#if 0
while ((OF_getprop(OF_parent(node), "bus-range", (void *)&busrange,
sizeof(busrange)) == sizeof(busrange)) &&
(b < busrange[0] || b > busrange[1])) {
/* Out of range, go up one */
node = OF_parent(node);
DPRINTF(SPDB_PROBE, printf("going up to node %x %s\n",
node,
prom_getpropstringA(node, "name", name, sizeof(name))));
}
#endif
node = prom_firstchild(node);
/*
* Now traverse all peers until we find the node or we find
* the right bridge.
*
* XXX We go up one and down one to make sure nobody's missed.
* but this should not be necessary.
*/
for (node = ((node)); node; node = prom_nextsibling(node)) {
DPRINTF(SPDB_PROBE, ("checking node %x %s\n", node,
prom_getpropstringA(node, "name", name, sizeof(name))));
#if 1
/*
* Check for PCI-PCI bridges. If the device we want is
* in the bus-range for that bridge, work our way down.
*/
while (1) {
int busrange[2], *brp;
len = 2;
brp = busrange;
if (prom_getprop(node, "bus-range", sizeof(*brp),
&len, &brp) != 0)
break;
if (len != 2 || b < busrange[0] || b > busrange[1])
break;
/* Go down 1 level, as long as we're able */
new_node = prom_firstchild(node);
if (new_node == 0)
break;
node = new_node;
DPRINTF(SPDB_PROBE, ("going down to node %x %s\n", node,
prom_getpropstringA(node, "name", name,
sizeof(name))));
}
#endif /*1*/
/*
* We only really need the first `reg' property.
*
* For simplicity, we'll query the `reg' when we
* need it. Otherwise we could malloc() it, but
* that gets more complicated.
*/
len = prom_getproplen(node, "reg");
if (len < sizeof(reg))
continue;
if (OF_getprop(node, "reg", (void *)®, sizeof(reg)) != len)
panic("pci_probe_bus: OF_getprop len botch");
if (b != OFW_PCI_PHYS_HI_BUS(reg.phys_hi))
continue;
if (d != OFW_PCI_PHYS_HI_DEVICE(reg.phys_hi))
continue;
if (f != OFW_PCI_PHYS_HI_FUNCTION(reg.phys_hi))
continue;
/* Got a match */
tag = ofpci_make_tag(pc, node, b, d, f);
return (tag);
}
/* No device found -- return a dead tag */
return (tag);
}
void
pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, int *bp, int *dp, int *fp)
{
if (bp != NULL)
*bp = PCITAG_BUS(tag);
if (dp != NULL)
*dp = PCITAG_DEV(tag);
if (fp != NULL)
*fp = PCITAG_FUN(tag);
}
int
sparc64_pci_enumerate_bus(struct pci_softc *sc, const int *locators,
int (*match)(const struct pci_attach_args *), struct pci_attach_args *pap)
{
struct ofw_pci_register reg;
pci_chipset_tag_t pc = sc->sc_pc;
pcitag_t tag;
pcireg_t class, csr, bhlc, ic;
int node, b, d, f, ret;
int bus_frequency, lt, cl, cacheline;
char name[30];
#if 0
extern int pci_config_dump;
#endif
if (sc->sc_bridgetag)
node = PCITAG_NODE(*sc->sc_bridgetag);
else
node = pc->rootnode;
bus_frequency =
prom_getpropint(node, "clock-frequency", 33000000) / 1000000;
/*
* Make sure the cache line size is at least as big as the
* ecache line and the streaming cache (64 byte).
*/
cacheline = uimax(ecache_min_line_size, 64);
KASSERT((cacheline/64)*64 == cacheline &&
(cacheline/ecache_min_line_size)*ecache_min_line_size == cacheline &&
(cacheline/4)*4 == cacheline);
#if 0
/*
* XXX this faults on Fire PCIe controllers.
* XXX move into the psycho and schizo driver front ends.
*/
/* Turn on parity for the bus. */
tag = ofpci_make_tag(pc, node, sc->sc_bus, 0, 0);
csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
csr |= PCI_COMMAND_PARITY_ENABLE;
pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr);
/*
* Initialize the latency timer register.
* The value 0x40 is from Solaris.
*/
bhlc = pci_conf_read(pc, tag, PCI_BHLC_REG);
bhlc &= ~(PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT);
bhlc |= 0x40 << PCI_LATTIMER_SHIFT;
pci_conf_write(pc, tag, PCI_BHLC_REG, bhlc);
if (pci_config_dump)
pci_conf_print(pc, tag, NULL);
#endif
for (node = prom_firstchild(node); node != 0 && node != -1;
node = prom_nextsibling(node)) {
name[0] = name[29] = 0;
prom_getpropstringA(node, "name", name, sizeof(name));
if (OF_getprop(node, "class-code", &class, sizeof(class)) !=
sizeof(class))
continue;
if (OF_getprop(node, "reg", ®, sizeof(reg)) < sizeof(reg))
panic("pci_enumerate_bus: \"%s\" regs too small", name);
b = OFW_PCI_PHYS_HI_BUS(reg.phys_hi);
d = OFW_PCI_PHYS_HI_DEVICE(reg.phys_hi);
f = OFW_PCI_PHYS_HI_FUNCTION(reg.phys_hi);
if (sc->sc_bus != b) {
aprint_error_dev(sc->sc_dev, "WARNING: incorrect "
"bus # for \"%s\" (%d/%d/%d)\n", name, b, d, f);
continue;
}
if ((locators[PCICF_DEV] != PCICF_DEV_DEFAULT) &&
(locators[PCICF_DEV] != d))
continue;
if ((locators[PCICF_FUNCTION] != PCICF_FUNCTION_DEFAULT) &&
(locators[PCICF_FUNCTION] != f))
continue;
tag = ofpci_make_tag(pc, node, b, d, f);
/*
* Turn on parity and fast-back-to-back for the device.
*/
csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
if (csr & PCI_STATUS_BACKTOBACK_SUPPORT)
csr |= PCI_COMMAND_BACKTOBACK_ENABLE;
csr |= PCI_COMMAND_PARITY_ENABLE;
pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr);
/*
* Initialize the latency timer register for busmaster
* devices to work properly.
* latency-timer = min-grant * bus-freq / 4 (from FreeBSD)
* Also initialize the cache line size register.
* Solaris anytime sets this register to the value 0x10.
*/
bhlc = pci_conf_read(pc, tag, PCI_BHLC_REG);
ic = pci_conf_read(pc, tag, PCI_INTERRUPT_REG);
lt = uimin(PCI_MIN_GNT(ic) * bus_frequency / 4, 255);
if (lt == 0 || lt < PCI_LATTIMER(bhlc))
lt = PCI_LATTIMER(bhlc);
cl = PCI_CACHELINE(bhlc);
if (cl == 0)
cl = cacheline;
bhlc &= ~((PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT) |
(PCI_CACHELINE_MASK << PCI_CACHELINE_SHIFT));
bhlc |= (lt << PCI_LATTIMER_SHIFT) |
(cl << PCI_CACHELINE_SHIFT);
pci_conf_write(pc, tag, PCI_BHLC_REG, bhlc);
ret = pci_probe_device(sc, tag, match, pap);
if (match != NULL && ret != 0)
return (ret);
}
return (0);
}
const char *
pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih, char *buf,
size_t len)
{
snprintf(buf, len, "ivec %x", ih);
DPRINTF(SPDB_INTR, ("pci_intr_string: returning %s\n", buf));
return buf;
}
const struct evcnt *
pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih)
{
/* XXX for now, no evcnt parent reported */
return NULL;
}
int
pci_intr_setattr(pci_chipset_tag_t pc, pci_intr_handle_t *ih,
int attr, uint64_t data)
{
switch (attr) {
case PCI_INTR_MPSAFE:
return 0;
default:
return ENODEV;
}
}
/*
* interrupt mapping foo.
* XXX: how does this deal with multiple interrupts for a device?
*/
int
pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
pcitag_t tag = pa->pa_tag;
int interrupts[4], *intp, int_used;
int len, node = PCITAG_NODE(tag);
char devtype[30];
intp = &interrupts[0];
len = prom_getproplen(node, "interrupts");
if (len > sizeof(interrupts)) {
DPRINTF(SPDB_INTMAP,
("pci_intr_map: too many available interrupts\n"));
return (ENODEV);
}
if (prom_getprop(node, "interrupts", len,
&len, &intp) != 0 || len != 1) {
DPRINTF(SPDB_INTMAP,
("pci_intr_map: could not read interrupts\n"));
return (ENODEV);
}
/* XXX We pick the first interrupt, but should do better */
int_used = interrupts[0];
if (OF_mapintr(node, &int_used, sizeof(int_used),
sizeof(int_used)) < 0) {
printf("OF_mapintr failed\n");
if (pa->pa_pc->spc_find_ino)
pa->pa_pc->spc_find_ino(pa, &int_used);
}
DPRINTF(SPDB_INTMAP, ("OF_mapintr() gave %x\n", int_used));
/* Try to find an IPL for this type of device. */
prom_getpropstringA(node, "device_type", devtype, sizeof(devtype));
for (len = 0; intrmap[len].in_class != NULL; len++)
if (strcmp(intrmap[len].in_class, devtype) == 0) {
int_used |= INTLEVENCODE(intrmap[len].in_lev);
DPRINTF(SPDB_INTMAP, ("reset to %x\n", int_used));
break;
}
*ihp = int_used;
/* Call the sub-driver is necessary */
if (pa->pa_pc->spc_intr_map)
(*pa->pa_pc->spc_intr_map)(pa, ihp);
return (0);
}
void
pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie)
{
DPRINTF(SPDB_INTR, ("pci_intr_disestablish: cookie %p\n", cookie));
/* XXX */
/* panic("can't disestablish PCI interrupts yet"); */
}
int
sparc_pci_childspace(int type)
{
int ss;
switch (type) {
case PCI_CONFIG_BUS_SPACE:
ss = 0x00;
break;
case PCI_IO_BUS_SPACE:
ss = 0x01;
break;
case PCI_MEMORY_BUS_SPACE:
ss = 0x02;
break;
#if 0
/* we don't do 64 bit memory space */
case PCI_MEMORY64_BUS_SPACE:
ss = 0x03;
break;
#endif
default:
panic("get_childspace: unknown bus type: %d", type);
}
return (ss);
}