/* $OpenBSD: ebus.c,v 1.9 2002/03/14 03:16:00 millert Exp $ */ /* $NetBSD: ebus.c,v 1.24 2001/07/25 03:49:54 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. */ /* * 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 */ #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 #include #include #include #include #include #include #include #define _SPARC_BUS_DMA_PRIVATE #include #include #include #include #include #include #include #include #include #include #include #include #include int ebus_match(struct device *, void *, void *); void ebus_attach(struct device *, struct device *, void *); struct cfattach ebus_ca = { sizeof(struct ebus_softc), ebus_match, ebus_attach }; struct cfdriver ebus_cd = { NULL, "ebus", DV_DULL }; int ebus_setup_attach_args(struct ebus_softc *, int, struct ebus_attach_args *); void ebus_destroy_attach_args(struct ebus_attach_args *); int ebus_print(void *, const char *); void ebus_find_ino(struct ebus_softc *, struct ebus_attach_args *); int ebus_find_node(struct pci_attach_args *); /* * here are our bus space and bus dma routines. */ static paddr_t ebus_bus_mmap(bus_space_tag_t, bus_addr_t, off_t, int, int); static int _ebus_bus_map(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(bus_space_tag_t, int, int, int, int (*)(void *), void *); static int ebus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int); static void ebus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); static void ebus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int); int ebus_dmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t, bus_dma_segment_t *, int, int *, int); void ebus_dmamem_free(bus_dma_tag_t, bus_dma_segment_t *, int); int ebus_dmamem_map(bus_dma_tag_t, bus_dma_segment_t *, int, size_t, caddr_t *, int); void ebus_dmamem_unmap(bus_dma_tag_t, caddr_t, size_t); int ebus_match(parent, match, aux) struct device *parent; void *match; void *aux; { struct pci_attach_args *pa = aux; char name[10]; 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 */ OF_getprop(node, "name", &name, sizeof(name)); 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 && strcmp(name, "ebus") == 0) return (1); /* Or a real ebus III */ 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_EBUSIII && strcmp(name, "ebus") == 0) 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; printf("\n"); 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); } 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 sc->sc_dmatag = dt; return (dt); } /* * bus space support. 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, 0, pciaddr, size, flags, vaddr, hp)); } DPRINTF(EDB_BUSMAP, (": FAILED\n")); return (EINVAL); } static paddr_t ebus_bus_mmap(t, paddr, off, prot, flags) bus_space_tag_t t; bus_addr_t paddr; off_t off; int prot; int flags; { 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, paddr, off, prot, flags)); } 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)(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; { return (bus_dmamap_load(t->_parent, map, buf, buflen, p, flags)); } void ebus_dmamap_unload(t, map) bus_dma_tag_t t; bus_dmamap_t map; { bus_dmamap_unload(t->_parent, 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; { 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; { return (bus_dmamem_alloc(t->_parent, 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; { bus_dmamem_free(t->_parent, 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; { return (bus_dmamem_map(t->_parent, segs, nsegs, size, kvap, flags)); } void ebus_dmamem_unmap(t, kva, size) bus_dma_tag_t t; caddr_t kva; size_t size; { return (bus_dmamem_unmap(t->_parent, kva, size)); }