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/* $OpenBSD: cbus.c,v 1.6 2009/05/10 12:48:24 kettenis 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/mdesc.h>
#include <machine/openfirm.h>
#include <sparc64/dev/cbusvar.h>
#include <sparc64/dev/vbusvar.h>
struct cbus_softc {
struct device sc_dv;
bus_space_tag_t sc_bustag;
bus_dma_tag_t sc_dmatag;
/* Machine description. */
int sc_idx;
};
int cbus_match(struct device *, void *, void *);
void cbus_attach(struct device *, struct device *, void *);
int cbus_print(void *, const char *);
struct cfattach cbus_ca = {
sizeof(struct cbus_softc), cbus_match, cbus_attach
};
struct cfdriver cbus_cd = {
NULL, "cbus", DV_DULL
};
void *cbus_intr_establish(bus_space_tag_t, bus_space_tag_t, int, int, int,
int (*)(void *), void *, const char *);
void cbus_intr_ack(struct intrhand *);
bus_space_tag_t cbus_alloc_bus_tag(struct cbus_softc *, bus_space_tag_t);
int cbus_get_channel_endpoint(struct cbus_softc *,
struct cbus_attach_args *);
int
cbus_match(struct device *parent, void *match, void *aux)
{
struct vbus_attach_args *va = aux;
if (strcmp(va->va_name, "channel-devices") == 0)
return (1);
return (0);
}
void
cbus_attach(struct device *parent, struct device *self, void *aux)
{
struct cbus_softc *sc = (struct cbus_softc *)self;
struct vbus_attach_args *va = aux;
int node;
sc->sc_bustag = cbus_alloc_bus_tag(sc, va->va_bustag);
sc->sc_dmatag = va->va_dmatag;
printf("\n");
sc->sc_idx = mdesc_find(va->va_name, va->va_reg[0]);
if (sc->sc_idx == -1)
return;
for (node = OF_child(va->va_node); node; node = OF_peer(node)) {
struct cbus_attach_args ca;
char buf[32];
bzero(&ca, sizeof(ca));
ca.ca_node = node;
if (OF_getprop(node, "name", buf, sizeof(buf)) <= 0)
continue;
ca.ca_name = buf;
ca.ca_bustag = sc->sc_bustag;
ca.ca_dmatag = sc->sc_dmatag;
getprop(node, "reg", sizeof(*ca.ca_reg),
&ca.ca_nreg, (void **)&ca.ca_reg);
if (cbus_get_channel_endpoint(sc, &ca) != 0)
continue;
config_found(self, &ca, cbus_print);
}
}
int
cbus_print(void *aux, const char *name)
{
struct cbus_attach_args *ca = aux;
if (name)
printf("\"%s\" at %s", ca->ca_name, name);
if (ca->ca_id != -1)
printf(" chan 0x%llx", ca->ca_id);
return (UNCONF);
}
int
cbus_intr_map(int node, int ino, uint64_t *sysino)
{
int parent;
int reg;
int err;
parent = OF_parent(node);
if (OF_getprop(parent, "reg", ®, sizeof(reg)) != sizeof(reg))
return (-1);
*sysino = INTIGN(reg) | INTINO(ino);
err = hv_vintr_setcookie(reg, ino, *sysino);
if (err != H_EOK)
return (-1);
return (0);
}
void *
cbus_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 devhandle = INTIGN(ihandle);
uint64_t devino = INTINO(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 = cbus_intr_ack;
err = hv_vintr_settarget(devhandle, devino, cpus->ci_upaid);
if (err != H_EOK) {
printf("hv_vintr_settarget: %d\n", err);
return (NULL);
}
/* Clear pending interrupts. */
err = hv_vintr_setstate(devhandle, devino, INTR_IDLE);
if (err != H_EOK) {
printf("hv_vintr_setstate: %d\n", err);
return (NULL);
}
err = hv_vintr_setenabled(devhandle, devino, INTR_ENABLED);
if (err != H_EOK) {
printf("hv_vintr_setenabled: %d\n", err);
return (NULL);
}
return (ih);
}
void
cbus_intr_ack(struct intrhand *ih)
{
uint64_t devhandle = INTIGN(ih->ih_number);
uint64_t devino = INTINO(ih->ih_number);
hv_vintr_setstate(devhandle, devino, INTR_IDLE);
}
bus_space_tag_t
cbus_alloc_bus_tag(struct cbus_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 cbus 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 = cbus_intr_establish;
return (bt);
}
int
cbus_get_channel_endpoint(struct cbus_softc *sc, struct cbus_attach_args *ca)
{
struct md_header *hdr;
struct md_element *elem;
const char *name_blk;
const char *str;
int idx;
int arc;
idx = mdesc_find_child(sc->sc_idx, ca->ca_name, ca->ca_reg[0]);
if (idx == -1)
return (ENOENT);
hdr = (struct md_header *)mdesc;
elem = (struct md_element *)(mdesc + sizeof(struct md_header));
name_blk = mdesc + sizeof(struct md_header) + hdr->node_blk_sz;
ca->ca_idx = idx;
ca->ca_id = -1;
ca->ca_tx_ino = -1;
ca->ca_rx_ino = -1;
if (strcmp(ca->ca_name, "disk") != 0 &&
strcmp(ca->ca_name, "network") != 0)
return (0);
for (; elem[idx].tag != 'E'; idx++) {
str = name_blk + elem[idx].name_offset;
if (elem[idx].tag != 'a' || strcmp(str, "fwd") != 0)
continue;
arc = elem[idx].d.val;
str = name_blk + elem[arc].name_offset;
if (strcmp(str, "virtual-device-port") == 0) {
idx = arc;
continue;
}
if (strcmp(str, "channel-endpoint") == 0) {
ca->ca_id = mdesc_get_prop_val(arc, "id");
ca->ca_tx_ino = mdesc_get_prop_val(arc, "tx-ino");
ca->ca_rx_ino = mdesc_get_prop_val(arc, "rx-ino");
return (0);
}
}
return (0);
}
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