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NetBSD/sys/arch/sparc64/dev/ebus.c
eeh 1fead733d9 PCI overhaul.
2001-07-20 00:07:12 +00:00

639 lines
16 KiB
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/* $NetBSD: ebus.c,v 1.23 2001/07/20 00:07:12 eeh 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.
* 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.
*/
#include "opt_ddb.h"
/*
* UltraSPARC 5 and beyond ebus support.
*
* note that this driver is not complete:
* - ebus2 dma code is completely unwritten
* - interrupt establish is written and appears to work
* - bus map code is written and appears to work
*/
#undef DEBUG
#define DEBUG
#ifdef DEBUG
#define EDB_PROM 0x01
#define EDB_CHILD 0x02
#define EDB_INTRMAP 0x04
#define EDB_BUSMAP 0x08
#define EDB_BUSDMA 0x10
#define EDB_INTR 0x20
int ebus_debug = 0x0;
#define DPRINTF(l, s) do { if (ebus_debug & l) printf s; } while (0)
#else
#define DPRINTF(l, s)
#endif
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/extent.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/time.h>
#define _SPARC_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/openfirm.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <sparc64/dev/iommureg.h>
#include <sparc64/dev/iommuvar.h>
#include <sparc64/dev/psychoreg.h>
#include <sparc64/dev/psychovar.h>
#include <sparc64/dev/ebusreg.h>
#include <sparc64/dev/ebusvar.h>
#include <sparc64/sparc64/cache.h>
int ebus_match __P((struct device *, struct cfdata *, void *));
void ebus_attach __P((struct device *, struct device *, void *));
struct cfattach ebus_ca = {
sizeof(struct ebus_softc), ebus_match, ebus_attach
};
int ebus_setup_attach_args __P((struct ebus_softc *, int,
struct ebus_attach_args *));
void ebus_destroy_attach_args __P((struct ebus_attach_args *));
int ebus_print __P((void *, const char *));
void ebus_find_ino __P((struct ebus_softc *, struct ebus_attach_args *));
int ebus_find_node __P((struct pci_attach_args *));
/*
* here are our bus space and bus dma routines.
*/
static int ebus_bus_mmap __P((bus_space_tag_t, bus_type_t, bus_addr_t,
int, bus_space_handle_t *));
static int _ebus_bus_map __P((bus_space_tag_t, bus_type_t, bus_addr_t,
bus_size_t, int, vaddr_t,
bus_space_handle_t *));
static void *ebus_intr_establish __P((bus_space_tag_t, int, int, int,
int (*) __P((void *)), void *));
static int ebus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *,
bus_size_t, struct proc *, int));
static void ebus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t));
static void ebus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
bus_size_t, int));
int ebus_dmamem_alloc __P((bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t,
bus_dma_segment_t *, int, int *, int));
void ebus_dmamem_free __P((bus_dma_tag_t, bus_dma_segment_t *, int));
int ebus_dmamem_map __P((bus_dma_tag_t, bus_dma_segment_t *, int, size_t,
caddr_t *, int));
void ebus_dmamem_unmap __P((bus_dma_tag_t, caddr_t, size_t));
int
ebus_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct pci_attach_args *pa = aux;
int node;
/* Only attach if there's a PROM node. */
node = PCITAG_NODE(pa->pa_tag);
if (node == -1) return (0);
/* Match a real ebus */
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN &&
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS)
return (1);
/* Or a PCI-ISA bridge XXX I hope this is on-board. */
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) {
return (1);
}
return (0);
}
/*
* attach an ebus and all it's children. this code is modeled
* after the sbus code which does similar things.
*/
void
ebus_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ebus_softc *sc = (struct ebus_softc *)self;
struct pci_attach_args *pa = aux;
struct ebus_attach_args eba;
struct ebus_interrupt_map_mask *immp;
int node, nmapmask, error;
char devinfo[256];
printf("\n");
pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
printf("%s: %s, revision 0x%02x\n", self->dv_xname, devinfo,
PCI_REVISION(pa->pa_class));
sc->sc_parent = (struct psycho_softc *)parent;
sc->sc_memtag = pa->pa_memt;
sc->sc_iotag = pa->pa_iot;
sc->sc_childbustag = ebus_alloc_bus_tag(sc, PCI_MEMORY_BUS_SPACE);
sc->sc_dmatag = ebus_alloc_dma_tag(sc, pa->pa_dmat);
node = PCITAG_NODE(pa->pa_tag);
if (node == -1)
panic("could not find ebus node");
sc->sc_node = node;
/*
* fill in our softc with information from the prom
*/
sc->sc_intmap = NULL;
sc->sc_range = NULL;
error = getprop(node, "interrupt-map",
sizeof(struct ebus_interrupt_map),
&sc->sc_nintmap, (void **)&sc->sc_intmap);
switch (error) {
case 0:
immp = &sc->sc_intmapmask;
error = getprop(node, "interrupt-map-mask",
sizeof(struct ebus_interrupt_map_mask), &nmapmask,
(void **)&immp);
if (error)
panic("could not get ebus interrupt-map-mask");
if (nmapmask != 1)
panic("ebus interrupt-map-mask is broken");
break;
case ENOENT:
break;
default:
panic("ebus interrupt-map: error %d", error);
break;
}
error = getprop(node, "ranges", sizeof(struct ebus_ranges),
&sc->sc_nrange, (void **)&sc->sc_range);
if (error)
panic("ebus ranges: error %d", error);
/*
* now attach all our children
*/
DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node));
for (node = firstchild(node); node; node = nextsibling(node)) {
char *name = getpropstring(node, "name");
if (ebus_setup_attach_args(sc, node, &eba) != 0) {
printf("ebus_attach: %s: incomplete\n", name);
continue;
} else {
DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n",
eba.ea_name));
(void)config_found(self, &eba, ebus_print);
}
ebus_destroy_attach_args(&eba);
}
}
int
ebus_setup_attach_args(sc, node, ea)
struct ebus_softc *sc;
int node;
struct ebus_attach_args *ea;
{
int n, rv;
bzero(ea, sizeof(struct ebus_attach_args));
rv = getprop(node, "name", 1, &n, (void **)&ea->ea_name);
if (rv != 0)
return (rv);
ea->ea_name[n] = '\0';
ea->ea_node = node;
ea->ea_bustag = sc->sc_childbustag;
ea->ea_dmatag = sc->sc_dmatag;
rv = getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nregs,
(void **)&ea->ea_regs);
if (rv)
return (rv);
rv = getprop(node, "address", sizeof(u_int32_t), &ea->ea_nvaddrs,
(void **)&ea->ea_vaddrs);
if (rv != ENOENT) {
if (rv)
return (rv);
if (ea->ea_nregs != ea->ea_nvaddrs)
printf("ebus loses: device %s: %d regs and %d addrs\n",
ea->ea_name, ea->ea_nregs, ea->ea_nvaddrs);
} else
ea->ea_nvaddrs = 0;
if (getprop(node, "interrupts", sizeof(u_int32_t), &ea->ea_nintrs,
(void **)&ea->ea_intrs))
ea->ea_nintrs = 0;
else
ebus_find_ino(sc, ea);
return (0);
}
void
ebus_destroy_attach_args(ea)
struct ebus_attach_args *ea;
{
if (ea->ea_name)
free((void *)ea->ea_name, M_DEVBUF);
if (ea->ea_regs)
free((void *)ea->ea_regs, M_DEVBUF);
if (ea->ea_intrs)
free((void *)ea->ea_intrs, M_DEVBUF);
if (ea->ea_vaddrs)
free((void *)ea->ea_vaddrs, M_DEVBUF);
}
int
ebus_print(aux, p)
void *aux;
const char *p;
{
struct ebus_attach_args *ea = aux;
int i;
if (p)
printf("%s at %s", ea->ea_name, p);
for (i = 0; i < ea->ea_nregs; i++)
printf("%s %x-%x", i == 0 ? " addr" : ",",
ea->ea_regs[i].lo,
ea->ea_regs[i].lo + ea->ea_regs[i].size - 1);
for (i = 0; i < ea->ea_nintrs; i++)
printf(" ipl %d", ea->ea_intrs[i]);
return (UNCONF);
}
/*
* find the INO values for each interrupt and fill them in.
*
* for each "reg" property of this device, mask it's hi and lo
* values with the "interrupt-map-mask"'s hi/lo values, and also
* mask the interrupt number with the interrupt mask. search the
* "interrupt-map" list for matching values of hi, lo and interrupt
* to give the INO for this interrupt.
*/
void
ebus_find_ino(sc, ea)
struct ebus_softc *sc;
struct ebus_attach_args *ea;
{
u_int32_t hi, lo, intr;
int i, j, k;
if (sc->sc_nintmap == 0) {
for (i = 0; i < ea->ea_nintrs; i++) {
OF_mapintr(ea->ea_node, &ea->ea_intrs[i],
sizeof(ea->ea_intrs[0]),
sizeof(ea->ea_intrs[0]));
}
return;
}
DPRINTF(EDB_INTRMAP,
("ebus_find_ino: searching %d interrupts", ea->ea_nintrs));
for (j = 0; j < ea->ea_nintrs; j++) {
intr = ea->ea_intrs[j] & sc->sc_intmapmask.intr;
DPRINTF(EDB_INTRMAP,
("; intr %x masked to %x", ea->ea_intrs[j], intr));
for (i = 0; i < ea->ea_nregs; i++) {
hi = ea->ea_regs[i].hi & sc->sc_intmapmask.hi;
lo = ea->ea_regs[i].lo & sc->sc_intmapmask.lo;
DPRINTF(EDB_INTRMAP,
("; reg hi.lo %08x.%08x masked to %08x.%08x",
ea->ea_regs[i].hi, ea->ea_regs[i].lo, hi, lo));
for (k = 0; k < sc->sc_nintmap; k++) {
DPRINTF(EDB_INTRMAP,
("; checking hi.lo %08x.%08x intr %x",
sc->sc_intmap[k].hi, sc->sc_intmap[k].lo,
sc->sc_intmap[k].intr));
if (hi == sc->sc_intmap[k].hi &&
lo == sc->sc_intmap[k].lo &&
intr == sc->sc_intmap[k].intr) {
ea->ea_intrs[j] =
sc->sc_intmap[k].cintr;
DPRINTF(EDB_INTRMAP,
("; FOUND IT! changing to %d\n",
sc->sc_intmap[k].cintr));
goto next_intr;
}
}
}
next_intr:;
}
}
/*
* bus space and bus dma below here
*/
bus_space_tag_t
ebus_alloc_bus_tag(sc, type)
struct ebus_softc *sc;
int type;
{
bus_space_tag_t bt;
bt = (bus_space_tag_t)
malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_NOWAIT);
if (bt == NULL)
panic("could not allocate ebus bus tag");
bzero(bt, sizeof *bt);
bt->cookie = sc;
bt->parent = sc->sc_memtag;
bt->type = type;
bt->sparc_bus_map = _ebus_bus_map;
bt->sparc_bus_mmap = ebus_bus_mmap;
bt->sparc_intr_establish = ebus_intr_establish;
return (bt);
}
/* XXX? */
bus_dma_tag_t
ebus_alloc_dma_tag(sc, pdt)
struct ebus_softc *sc;
bus_dma_tag_t pdt;
{
bus_dma_tag_t dt;
dt = (bus_dma_tag_t)
malloc(sizeof(struct sparc_bus_dma_tag), M_DEVBUF, M_NOWAIT);
if (dt == NULL)
panic("could not allocate ebus dma tag");
bzero(dt, sizeof *dt);
dt->_cookie = sc;
dt->_parent = pdt;
#define PCOPY(x) dt->x = pdt->x
PCOPY(_dmamap_create);
PCOPY(_dmamap_destroy);
dt->_dmamap_load = ebus_dmamap_load;
PCOPY(_dmamap_load_mbuf);
PCOPY(_dmamap_load_uio);
PCOPY(_dmamap_load_raw);
dt->_dmamap_unload = ebus_dmamap_unload;
dt->_dmamap_sync = ebus_dmamap_sync;
dt->_dmamem_alloc = ebus_dmamem_alloc;
dt->_dmamem_free = ebus_dmamem_free;
dt->_dmamem_map = ebus_dmamem_map;
dt->_dmamem_unmap = ebus_dmamem_unmap;
PCOPY(_dmamem_mmap);
#undef PCOPY
return (dt);
}
/*
* bus space support. <sparc64/dev/psychoreg.h> has a discussion
* about PCI physical addresses, which also applies to ebus.
*/
static int
_ebus_bus_map(t, btype, offset, size, flags, vaddr, hp)
bus_space_tag_t t;
bus_type_t btype;
bus_addr_t offset;
bus_size_t size;
int flags;
vaddr_t vaddr;
bus_space_handle_t *hp;
{
struct ebus_softc *sc = t->cookie;
bus_addr_t hi, lo;
int i, ss;
DPRINTF(EDB_BUSMAP,
("\n_ebus_bus_map: type %d off %016llx sz %x flags %d va %p",
(int)t->type, (unsigned long long)offset, (int)size, (int)flags,
(void *)vaddr));
hi = offset >> 32UL;
lo = offset & 0xffffffff;
DPRINTF(EDB_BUSMAP, (" (hi %08x lo %08x)", (u_int)hi, (u_int)lo));
for (i = 0; i < sc->sc_nrange; i++) {
bus_addr_t pciaddr;
if (hi != sc->sc_range[i].child_hi)
continue;
if (lo < sc->sc_range[i].child_lo ||
(lo + size) >
(sc->sc_range[i].child_lo + sc->sc_range[i].size))
continue;
/* Isolate address space and find the right tag */
ss = (sc->sc_range[i].phys_hi>>24)&3;
switch (ss) {
case 1: /* I/O space */
t = sc->sc_iotag;
break;
case 2: /* Memory space */
t = sc->sc_memtag;
break;
case 0: /* Config space */
case 3: /* 64-bit Memory space */
default: /* WTF? */
/* We don't handle these */
panic("_ebus_bus_map: illegal space %x", ss);
break;
}
pciaddr = ((bus_addr_t)sc->sc_range[i].phys_mid << 32UL) |
sc->sc_range[i].phys_lo;
pciaddr += lo;
DPRINTF(EDB_BUSMAP,
("\n_ebus_bus_map: mapping space %x paddr offset %qx pciaddr %qx\n",
ss, (unsigned long long)offset, (unsigned long long)pciaddr));
/* pass it onto the psycho */
return (bus_space_map2(t, sc->sc_range[i].phys_hi,
pciaddr, size, flags, vaddr, hp));
}
DPRINTF(EDB_BUSMAP, (": FAILED\n"));
return (EINVAL);
}
static int
ebus_bus_mmap(t, btype, paddr, flags, hp)
bus_space_tag_t t;
bus_type_t btype;
bus_addr_t paddr;
int flags;
bus_space_handle_t *hp;
{
bus_addr_t offset = paddr;
struct ebus_softc *sc = t->cookie;
int i;
for (i = 0; i < sc->sc_nrange; i++) {
bus_addr_t paddr = ((bus_addr_t)sc->sc_range[i].child_hi << 32) |
sc->sc_range[i].child_lo;
if (offset != paddr)
continue;
DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_mmap: mapping paddr %qx\n",
(unsigned long long)paddr));
return (bus_space_mmap(sc->sc_memtag, 0, paddr,
flags, hp));
}
return (-1);
}
/*
* install an interrupt handler for a PCI device
*/
void *
ebus_intr_establish(t, pri, level, flags, handler, arg)
bus_space_tag_t t;
int pri;
int level;
int flags;
int (*handler) __P((void *));
void *arg;
{
return (bus_intr_establish(t->parent, pri, level, flags, handler, arg));
}
/*
* bus dma support
*/
int
ebus_dmamap_load(t, map, buf, buflen, p, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
void *buf;
bus_size_t buflen;
struct proc *p;
int flags;
{
struct ebus_softc *sc = t->_cookie;
return (iommu_dvmamap_load(t, sc->sc_parent->sc_is, map, buf, buflen,
p, flags));
}
void
ebus_dmamap_unload(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
struct ebus_softc *sc = t->_cookie;
iommu_dvmamap_unload(t, sc->sc_parent->sc_is, map);
}
void
ebus_dmamap_sync(t, map, offset, len, ops)
bus_dma_tag_t t;
bus_dmamap_t map;
bus_addr_t offset;
bus_size_t len;
int ops;
{
struct ebus_softc *sc = t->_cookie;
iommu_dvmamap_sync(t, sc->sc_parent->sc_is, map, offset, len, ops);
bus_dmamap_sync(t->_parent, map, offset, len, ops);
}
int
ebus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags)
bus_dma_tag_t t;
bus_size_t size;
bus_size_t alignment;
bus_size_t boundary;
bus_dma_segment_t *segs;
int nsegs;
int *rsegs;
int flags;
{
struct ebus_softc *sc = t->_cookie;
return (iommu_dvmamem_alloc(t, sc->sc_parent->sc_is, size, alignment,
boundary, segs, nsegs, rsegs, flags));
}
void
ebus_dmamem_free(t, segs, nsegs)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs;
{
struct ebus_softc *sc = t->_cookie;
iommu_dvmamem_free(t, sc->sc_parent->sc_is, segs, nsegs);
}
int
ebus_dmamem_map(t, segs, nsegs, size, kvap, flags)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs;
size_t size;
caddr_t *kvap;
int flags;
{
struct ebus_softc *sc = t->_cookie;
return (iommu_dvmamem_map(t, sc->sc_parent->sc_is, segs, nsegs,
size, kvap, flags));
}
void
ebus_dmamem_unmap(t, kva, size)
bus_dma_tag_t t;
caddr_t kva;
size_t size;
{
struct ebus_softc *sc = t->_cookie;
iommu_dvmamem_unmap(t, sc->sc_parent->sc_is, kva, size);
}
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