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/* $OpenBSD: vbus.c,v 1.3 2008/11/10 16:50:13 art Exp $ */
/*
* Copyright (c) 2008 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <machine/autoconf.h>
#include <machine/hypervisor.h>
#include <machine/openfirm.h>
#include <sparc64/dev/vbusvar.h>
#include <dev/clock_subr.h>
extern todr_chip_handle_t todr_handle;
struct vbus_softc {
struct device sc_dv;
bus_space_tag_t sc_bustag;
};
int vbus_cmp_cells(int *, int *, int *, int);
int vbus_match(struct device *, void *, void *);
void vbus_attach(struct device *, struct device *, void *);
int vbus_print(void *, const char *);
struct cfattach vbus_ca = {
sizeof(struct vbus_softc), vbus_match, vbus_attach
};
struct cfdriver vbus_cd = {
NULL, "vbus", DV_DULL
};
void *vbus_intr_establish(bus_space_tag_t, bus_space_tag_t, int, int, int,
int (*)(void *), void *, const char *);
void vbus_intr_ack(struct intrhand *);
bus_space_tag_t vbus_alloc_bus_tag(struct vbus_softc *, bus_space_tag_t);
int
vbus_match(struct device *parent, void *match, void *aux)
{
struct mainbus_attach_args *ma = aux;
if (strcmp(ma->ma_name, "virtual-devices") == 0)
return (1);
return (0);
}
void
vbus_attach(struct device *parent, struct device *self, void *aux)
{
struct vbus_softc *sc = (struct vbus_softc *)self;
struct mainbus_attach_args *ma = aux;
int node;
sc->sc_bustag = vbus_alloc_bus_tag(sc, ma->ma_bustag);
printf("\n");
for (node = OF_child(ma->ma_node); node; node = OF_peer(node)) {
struct vbus_attach_args va;
char buf[32];
bzero(&va, sizeof(va));
va.va_node = node;
if (OF_getprop(node, "name", buf, sizeof(buf)) <= 0)
continue;
va.va_name = buf;
va.va_bustag = sc->sc_bustag;
getprop(node, "reg", sizeof(*va.va_reg),
&va.va_nreg, (void **)&va.va_reg);
getprop(node, "interrupts", sizeof(*va.va_intr),
&va.va_nintr, (void **)&va.va_intr);
config_found(self, &va, vbus_print);
}
if (todr_handle == NULL) {
struct vbus_attach_args va;
bzero(&va, sizeof(va));
va.va_name = "rtc";
config_found(self, &va, vbus_print);
}
}
int
vbus_print(void *aux, const char *name)
{
struct vbus_attach_args *va = aux;
if (name)
printf("\"%s\" at %s", va->va_name, name);
return (UNCONF);
}
/*
* Compare a sequence of cells with a mask, return 1 if they match and
* 0 if they don't.
*/
int
vbus_cmp_cells(int *cell1, int *cell2, int *mask, int ncells)
{
int i;
for (i = 0; i < ncells; i++) {
if (((cell1[i] ^ cell2[i]) & mask[i]) != 0)
return (0);
}
return (1);
}
int
vbus_intr_map(int node, int ino, uint64_t *sysino)
{
int *imap = NULL, nimap;
int *reg = NULL, nreg;
int *imap_mask;
int parent;
int address_cells, interrupt_cells;
uint64_t devhandle;
uint64_t devino;
int len;
int err;
parent = OF_parent(node);
address_cells = getpropint(parent, "#address-cells", 2);
interrupt_cells = getpropint(parent, "#interrupt-cells", 1);
KASSERT(interrupt_cells == 1);
len = OF_getproplen(parent, "interrupt-map-mask");
if (len < (address_cells + interrupt_cells) * sizeof(int))
return (-1);
imap_mask = malloc(len, M_DEVBUF, M_NOWAIT);
if (imap_mask == NULL)
return (-1);
if (OF_getprop(parent, "interrupt-map-mask", imap_mask, len) != len)
return (-1);
getprop(parent, "interrupt-map", sizeof(int), &nimap, (void **)&imap);
getprop(node, "reg", sizeof(*reg), &nreg, (void **)®);
if (nreg < address_cells)
return (-1);
while (nimap >= address_cells + interrupt_cells + 2) {
if (vbus_cmp_cells(imap, reg, imap_mask, address_cells) &&
vbus_cmp_cells(&imap[address_cells], &ino,
&imap_mask[address_cells], interrupt_cells)) {
node = imap[address_cells + interrupt_cells];
devino = imap[address_cells + interrupt_cells + 1];
free(reg, M_DEVBUF);
reg = NULL;
getprop(node, "reg", sizeof(*reg), &nreg, (void **)®);
devhandle = reg[0] & 0x0fffffff;
err = hv_intr_devino_to_sysino(devhandle, devino, sysino);
if (err != H_EOK)
return (-1);
KASSERT(*sysino == INTVEC(*sysino));
return (0);
}
imap += address_cells + interrupt_cells + 2;
nimap -= address_cells + interrupt_cells + 2;
}
return (-1);
}
void *
vbus_intr_establish(bus_space_tag_t t, bus_space_tag_t t0, int ihandle,
int level, int flags, int (*handler)(void *), void *arg, const char *what)
{
uint64_t sysino = INTVEC(ihandle);
struct intrhand *ih;
int err;
ih = bus_intr_allocate(t0, handler, arg, ihandle, level,
NULL, NULL, what);
if (ih == NULL)
return (NULL);
intr_establish(ih->ih_pil, ih);
ih->ih_ack = vbus_intr_ack;
err = hv_intr_settarget(sysino, cpus->ci_upaid);
if (err != H_EOK)
return (NULL);
/* Clear pending interrupts. */
err = hv_intr_setstate(sysino, INTR_IDLE);
if (err != H_EOK)
return (NULL);
err = hv_intr_setenabled(sysino, INTR_ENABLED);
if (err != H_EOK)
return (NULL);
return (ih);
}
void
vbus_intr_ack(struct intrhand *ih)
{
hv_intr_setstate(ih->ih_number, INTR_IDLE);
}
bus_space_tag_t
vbus_alloc_bus_tag(struct vbus_softc *sc, bus_space_tag_t parent)
{
struct sparc_bus_space_tag *bt;
bt = malloc(sizeof(*bt), M_DEVBUF, M_NOWAIT | M_ZERO);
if (bt == NULL)
panic("could not allocate vbus bus tag");
snprintf(bt->name, sizeof(bt->name), "%s", sc->sc_dv.dv_xname);
bt->cookie = sc;
bt->parent = parent;
bt->asi = parent->asi;
bt->sasi = parent->sasi;
bt->sparc_bus_map = parent->sparc_bus_map;
bt->sparc_intr_establish = vbus_intr_establish;
return (bt);
}
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