/* $OpenBSD: cbus.c,v 1.17 2021/10/24 17:05:03 mpi 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 #include #include #include #include #include #include #include #include #include struct cbus_softc { struct device sc_dv; bus_space_tag_t sc_bustag; bus_dma_tag_t sc_dmatag; uint64_t sc_devhandle; /* 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 *); const 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; int reg; sc->sc_bustag = cbus_alloc_bus_tag(sc, va->va_bustag); sc->sc_dmatag = va->va_dmatag; if (OF_getprop(va->va_node, "reg", ®, sizeof(reg)) != sizeof(reg)) return; sc->sc_devhandle = reg; 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_setstate(bus_space_tag_t t, uint64_t devino, uint64_t state) { struct cbus_softc *sc = t->cookie; uint64_t devhandle = sc->sc_devhandle; int err; err = hv_vintr_setstate(devhandle, devino, state); if (err != H_EOK) return (-1); return (0); } int cbus_intr_setenabled(bus_space_tag_t t, uint64_t devino, uint64_t enabled) { struct cbus_softc *sc = t->cookie; uint64_t devhandle = sc->sc_devhandle; int err; err = hv_vintr_setenabled(devhandle, devino, enabled); 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) { struct cbus_softc *sc = t0->cookie; uint64_t devhandle = sc->sc_devhandle; uint64_t devino = ihandle; struct intrhand *ih; int err; ih = bus_intr_allocate(t0, handler, arg, ihandle, level, NULL, NULL, what); if (ih == NULL) return (NULL); err = hv_vintr_setenabled(devhandle, devino, INTR_DISABLED); if (err != H_EOK) { printf("hv_vintr_setenabled: %d\n", err); return (NULL); } err = hv_vintr_setcookie(devhandle, devino, (vaddr_t)ih); if (err != H_EOK) { printf("hv_vintr_setcookie: %d\n", err); return (NULL); } if (flags & BUS_INTR_ESTABLISH_MPSAFE) ih->ih_mpsafe = 1; evcount_attach(&ih->ih_count, ih->ih_name, NULL); ih->ih_ack = cbus_intr_ack; ih->ih_cpu = cpus; err = hv_vintr_settarget(devhandle, devino, ih->ih_cpu->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); } return (ih); } void cbus_intr_ack(struct intrhand *ih) { bus_space_tag_t t = ih->ih_bus; struct cbus_softc *sc = t->cookie; uint64_t devhandle = sc->sc_devhandle; uint64_t devino = 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"); strlcpy(bt->name, sc->sc_dv.dv_xname, sizeof(bt->name)); 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); }