/* $OpenBSD: pci_machdep.c,v 1.25 2006/06/27 21:22:14 kettenis Exp $ */ /* $NetBSD: pci_machdep.c,v 1.22 2001/07/20 00:07:13 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. */ /* * functions expected by the MI PCI code. */ #ifdef DEBUG #define SPDB_CONF 0x01 #define SPDB_INTR 0x04 #define SPDB_INTMAP 0x08 #define SPDB_PROBE 0x20 int sparc_pci_debug = 0x0; #define DPRINTF(l, s) do { if (sparc_pci_debug & l) printf s; } while (0) #else #define DPRINTF(l, s) do { } while (0) #endif #include #include #include #include #include #include #include #define _SPARC_BUS_DMA_PRIVATE #include #include #include #include #include #include #include #include #include #include #include /* this is a base to be copied */ struct sparc_pci_chipset _sparc_pci_chipset = { NULL, }; static int pci_bus_frequency(int node); static pcitag_t ofpci_make_tag(pci_chipset_tag_t pc, int node, int b, int d, int f) { pcitag_t tag; tag = PCITAG_CREATE(node, b, d, f); /* Enable all the different spaces for this device */ pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, PCI_COMMAND_MEM_ENABLE|PCI_COMMAND_MASTER_ENABLE| PCI_COMMAND_IO_ENABLE); return (tag); } /* * functions provided to the MI code. */ void pci_attach_hook(parent, self, pba) struct device *parent; struct device *self; struct pcibus_attach_args *pba; { /* Don't do anything */ } int pci_bus_maxdevs(pc, busno) pci_chipset_tag_t pc; int busno; { return 32; } pcitag_t pci_make_tag(pc, b, d, f) pci_chipset_tag_t pc; int b; int d; int f; { struct ofw_pci_register reg; pcitag_t tag; int busrange[2]; int node, len; #ifdef DEBUG char name[80]; bzero(name, sizeof(name)); #endif /* * Hunt for the node that corresponds to this device * * We could cache this info in an array in the parent * device... except then we have problems with devices * attached below pci-pci bridges, and we would need to * add special code to the pci-pci bridge to cache this * info. */ tag = PCITAG_CREATE(-1, b, d, f); node = pc->rootnode; /* * First make sure we're on the right bus. If our parent * has a bus-range property and we're not in the range, * then we're obviously on the wrong bus. So go up one * level. */ #ifdef DEBUG if (sparc_pci_debug & SPDB_PROBE) { OF_getprop(node, "name", &name, sizeof(name)); printf("curnode %x %s\n", node, name); } #endif #if 0 while ((OF_getprop(OF_parent(node), "bus-range", (void *)&busrange, sizeof(busrange)) == sizeof(busrange)) && (b < busrange[0] || b > busrange[1])) { /* Out of range, go up one */ node = OF_parent(node); #ifdef DEBUG if (sparc_pci_debug & SPDB_PROBE) { OF_getprop(node, "name", &name, sizeof(name)); printf("going up to node %x %s\n", node, name); } #endif } #endif /* * Now traverse all peers until we find the node or we find * the right bridge. * * XXX We go up one and down one to make sure nobody's missed. * but this should not be necessary. */ for (node = ((node)); node; node = OF_peer(node)) { #ifdef DEBUG if (sparc_pci_debug & SPDB_PROBE) { OF_getprop(node, "name", &name, sizeof(name)); printf("checking node %x %s\n", node, name); } #endif #if 1 /* * Check for PCI-PCI bridges. If the device we want is * in the bus-range for that bridge, work our way down. */ while ((OF_getprop(node, "bus-range", (void *)&busrange, sizeof(busrange)) == sizeof(busrange)) && (b >= busrange[0] && b <= busrange[1])) { /* Go down 1 level */ node = OF_child(node); #ifdef DEBUG if (sparc_pci_debug & SPDB_PROBE) { OF_getprop(node, "name", &name, sizeof(name)); printf("going down to node %x %s\n", node, name); } #endif } #endif /* * We only really need the first `reg' property. * * For simplicity, we'll query the `reg' when we * need it. Otherwise we could malloc() it, but * that gets more complicated. */ len = OF_getproplen(node, "reg"); if (len < sizeof(reg)) continue; if (OF_getprop(node, "reg", (void *)®, sizeof(reg)) != len) panic("pci_probe_bus: OF_getprop len botch"); if (b != OFW_PCI_PHYS_HI_BUS(reg.phys_hi)) continue; if (d != OFW_PCI_PHYS_HI_DEVICE(reg.phys_hi)) continue; if (f != OFW_PCI_PHYS_HI_FUNCTION(reg.phys_hi)) continue; /* Got a match */ tag = ofpci_make_tag(pc, node, b, d, f); return (tag); } /* No device found -- return a dead tag */ return (tag); } void pci_decompose_tag(pc, tag, bp, dp, fp) pci_chipset_tag_t pc; pcitag_t tag; int *bp, *dp, *fp; { if (bp != NULL) *bp = PCITAG_BUS(tag); if (dp != NULL) *dp = PCITAG_DEV(tag); if (fp != NULL) *fp = PCITAG_FUN(tag); } static int pci_bus_frequency(int node) { int len, bus_frequency; len = OF_getproplen(node, "clock-frequency"); if (len < sizeof(bus_frequency)) { DPRINTF(SPDB_PROBE, ("pci_bus_frequency: clock-frequency len %d too small\n", len)); return 33; } if (OF_getprop(node, "clock-frequency", &bus_frequency, sizeof(bus_frequency)) != len) { DPRINTF(SPDB_PROBE, ("pci_bus_frequency: could not read clock-frequency\n")); return 33; } return bus_frequency / 1000000; } int sparc64_pci_enumerate_bus(struct pci_softc *sc, int (*match)(struct pci_attach_args *), struct pci_attach_args *pap) { struct ofw_pci_register reg; pci_chipset_tag_t pc = sc->sc_pc; pcitag_t tag; pcireg_t class, csr, bhlc, ic; int node, b, d, f, ret; int bus_frequency, lt, cl, cacheline; char name[30]; if (sc->sc_bridgetag) node = PCITAG_NODE(*sc->sc_bridgetag); else node = pc->rootnode; bus_frequency = pci_bus_frequency(node); /* * Make sure the cache line size is at least as big as the * ecache line and the streaming cache (64 byte). */ cacheline = max(cacheinfo.ec_linesize, 64); KASSERT((cacheline/64)*64 == cacheline && (cacheline/cacheinfo.ec_linesize)*cacheinfo.ec_linesize == cacheline && (cacheline/4)*4 == cacheline); /* Turn on parity for the bus. */ tag = ofpci_make_tag(pc, node, sc->sc_bus, 0, 0); csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); csr |= PCI_COMMAND_PARITY_ENABLE; pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr); /* * Initialize the latency timer register. * The value 0x40 is from Solaris. */ bhlc = pci_conf_read(pc, tag, PCI_BHLC_REG); bhlc &= ~(PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT); bhlc |= 0x40 << PCI_LATTIMER_SHIFT; pci_conf_write(pc, tag, PCI_BHLC_REG, bhlc); for (node = OF_child(node); node != 0 && node != -1; node = OF_peer(node)) { name[0] = name[29] = 0; OF_getprop(node, "name", name, sizeof(name)); if (OF_getprop(node, "class-code", &class, sizeof(class)) != sizeof(class)) continue; if (OF_getprop(node, "reg", ®, sizeof(reg)) < sizeof(reg)) panic("pci_enumerate_bus: \"%s\" regs too small", name); b = OFW_PCI_PHYS_HI_BUS(reg.phys_hi); d = OFW_PCI_PHYS_HI_DEVICE(reg.phys_hi); f = OFW_PCI_PHYS_HI_FUNCTION(reg.phys_hi); if (sc->sc_bus != b) { printf("%s: WARNING: incorrect bus # for \"%s\" " "(%d/%d/%d)\n", sc->sc_dev.dv_xname, name, b, d, f); continue; } tag = ofpci_make_tag(pc, node, b, d, f); /* * Turn on parity and fast-back-to-back for the device. */ csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); if (csr & PCI_STATUS_BACKTOBACK_SUPPORT) csr |= PCI_COMMAND_BACKTOBACK_ENABLE; csr |= PCI_COMMAND_PARITY_ENABLE; pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr); /* * Initialize the latency timer register for busmaster * devices to work properly. * latency-timer = min-grant * bus-freq / 4 (from FreeBSD) * Also initialize the cache line size register. * Solaris anytime sets this register to the value 0x10. */ bhlc = pci_conf_read(pc, tag, PCI_BHLC_REG); ic = pci_conf_read(pc, tag, PCI_INTERRUPT_REG); lt = min(PCI_MIN_GNT(ic) * bus_frequency / 4, 255); if (lt == 0 || lt < PCI_LATTIMER(bhlc)) lt = PCI_LATTIMER(bhlc); cl = PCI_CACHELINE(bhlc); if (cl == 0) cl = cacheline; bhlc &= ~((PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT) | (PCI_CACHELINE_MASK << PCI_CACHELINE_SHIFT)); bhlc |= (lt << PCI_LATTIMER_SHIFT) | (cl << PCI_CACHELINE_SHIFT); pci_conf_write(pc, tag, PCI_BHLC_REG, bhlc); ret = pci_probe_device(sc, tag, match, pap); if (match != NULL && ret != 0) return (ret); } return (0); } /* assume we are mapped little-endian/side-effect */ pcireg_t pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) { pcireg_t val = (pcireg_t)~0; DPRINTF(SPDB_CONF, ("pci_conf_read: tag %lx reg %x ", (long)PCITAG_OFFSET(tag), reg)); if (PCITAG_NODE(tag) != -1) { val = bus_space_read_4(pc->bustag, pc->bushandle, PCITAG_OFFSET(tag) + reg); } else DPRINTF(SPDB_CONF, ("pci_conf_read: bogus pcitag %x\n", (int)PCITAG_OFFSET(tag))); DPRINTF(SPDB_CONF, (" returning %08x\n", (u_int)val)); return (val); } void pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data) { DPRINTF(SPDB_CONF, ("pci_conf_write: tag %lx; reg %x; data %x; ", (long)PCITAG_OFFSET(tag), reg, (int)data)); /* If we don't know it, just punt. */ if (PCITAG_NODE(tag) == -1) { DPRINTF(SPDB_CONF, ("pci_config_write: bad addr")); return; } bus_space_write_4(pc->bustag, pc->bushandle, PCITAG_OFFSET(tag) + reg, data); } /* * interrupt mapping foo. * XXX: how does this deal with multiple interrupts for a device? */ int pci_intr_map(pa, ihp) struct pci_attach_args *pa; pci_intr_handle_t *ihp; { pcitag_t tag = pa->pa_tag; int interrupts; int len, node = PCITAG_NODE(tag); char devtype[30]; len = OF_getproplen(node, "interrupts"); if (len < sizeof(interrupts)) { DPRINTF(SPDB_INTMAP, ("pci_intr_map: interrupts len %d too small\n", len)); return (ENODEV); } if (OF_getprop(node, "interrupts", (void *)&interrupts, sizeof(interrupts)) != len) { DPRINTF(SPDB_INTMAP, ("pci_intr_map: could not read interrupts\n")); return (ENODEV); } if (OF_mapintr(node, &interrupts, sizeof(interrupts), sizeof(interrupts)) < 0) { interrupts = -1; } /* Try to find an IPL for this type of device. */ if (OF_getprop(node, "device_type", &devtype, sizeof(devtype)) > 0) { for (len = 0; intrmap[len].in_class; len++) if (strcmp(intrmap[len].in_class, devtype) == 0) { interrupts |= INTLEVENCODE(intrmap[len].in_lev); break; } } /* XXXX -- we use the ino. What if there is a valid IGN? */ *ihp = interrupts; if (pa->pa_pc->intr_map) return ((*pa->pa_pc->intr_map)(pa, ihp)); else return (0); } const char * pci_intr_string(pc, ih) pci_chipset_tag_t pc; pci_intr_handle_t ih; { static char str[16]; DPRINTF(SPDB_INTR, ("pci_intr_string: ih %u", ih)); snprintf(str, sizeof str, "ivec 0x%x", INTVEC(ih)); DPRINTF(SPDB_INTR, ("; returning %s\n", str)); return (str); } void * pci_intr_establish(pc, ih, level, func, arg, what) pci_chipset_tag_t pc; pci_intr_handle_t ih; int level; int (*func)(void *); void *arg; char *what; { void *cookie; struct psycho_pbm *pp = (struct psycho_pbm *)pc->cookie; DPRINTF(SPDB_INTR, ("pci_intr_establish: ih %lu; level %d", (u_long)ih, level)); cookie = bus_intr_establish(pp->pp_memt, ih, level, 0, func, arg, what); DPRINTF(SPDB_INTR, ("; returning handle %p\n", cookie)); return (cookie); } void pci_intr_disestablish(pc, cookie) pci_chipset_tag_t pc; void *cookie; { DPRINTF(SPDB_INTR, ("pci_intr_disestablish: cookie %p\n", cookie)); /* XXX */ printf("can't disestablish PCI interrupts yet\n"); }