/* $NetBSD: sbus.c,v 1.19 1999/06/20 00:51:30 eeh Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Paul Kranenburg. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Lawrence Berkeley Laboratory. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)sbus.c 8.1 (Berkeley) 6/11/93 */ /* * Copyright (c) 1999 Eduardo Horvath * * 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. * * 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. * */ /* * Sbus stuff. */ #include "opt_ddb.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DEBUG #define SDB_DVMA 0x1 #define SDB_INTR 0x2 int sbusdebug = 0; #endif void sbusreset __P((int)); static bus_space_tag_t sbus_alloc_bustag __P((struct sbus_softc *)); static bus_dma_tag_t sbus_alloc_dmatag __P((struct sbus_softc *)); static int sbus_get_intr __P((struct sbus_softc *, int, struct sbus_intr **, int *)); static int sbus_bus_mmap __P((bus_space_tag_t, bus_type_t, bus_addr_t, int, bus_space_handle_t *)); static int _sbus_bus_map __P(( bus_space_tag_t, bus_type_t, bus_addr_t, /*offset*/ bus_size_t, /*size*/ int, /*flags*/ vaddr_t, /*preferred virtual address */ bus_space_handle_t *)); static void *sbus_intr_establish __P(( bus_space_tag_t, int, /*level*/ int, /*flags*/ int (*) __P((void *)), /*handler*/ void *)); /*handler arg*/ /* autoconfiguration driver */ int sbus_match __P((struct device *, struct cfdata *, void *)); void sbus_attach __P((struct device *, struct device *, void *)); struct cfattach sbus_ca = { sizeof(struct sbus_softc), sbus_match, sbus_attach }; extern struct cfdriver sbus_cd; /* * DVMA routines */ int sbus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int)); void sbus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t)); void sbus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int)); int sbus_dmamem_alloc __P((bus_dma_tag_t tag, bus_size_t size, bus_size_t alignment, bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags)); void sbus_dmamem_free __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs)); int sbus_dmamem_map __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs, size_t size, caddr_t *kvap, int flags)); void sbus_dmamem_unmap __P((bus_dma_tag_t tag, caddr_t kva, size_t size)); /* * Child devices receive the Sbus interrupt level in their attach * arguments. We translate these to CPU IPLs using the following * tables. Note: obio bus interrupt levels are identical to the * processor IPL. * * The second set of tables is used when the Sbus interrupt level * cannot be had from the PROM as an `interrupt' property. We then * fall back on the `intr' property which contains the CPU IPL. */ /* Translate Sbus interrupt level to processor IPL */ static int intr_sbus2ipl_4c[] = { 0, 1, 2, 3, 5, 7, 8, 9 }; static int intr_sbus2ipl_4m[] = { 0, 2, 3, 5, 7, 9, 11, 13 }; /* * This value is or'ed into the attach args' interrupt level cookie * if the interrupt level comes from an `intr' property, i.e. it is * not an Sbus interrupt level. */ #define SBUS_INTR_COMPAT 0x80000000 /* * Print the location of some sbus-attached device (called just * before attaching that device). If `sbus' is not NULL, the * device was found but not configured; print the sbus as well. * Return UNCONF (config_find ignores this if the device was configured). */ int sbus_print(args, busname) void *args; const char *busname; { struct sbus_attach_args *sa = args; int i; if (busname) printf("%s at %s", sa->sa_name, busname); printf(" slot %ld offset 0x%lx", (long)sa->sa_slot, (u_long)sa->sa_offset); for (i=0; isa_nintr; i++) { struct sbus_intr *sbi = &sa->sa_intr[i]; printf(" vector %lx ipl %ld", (u_long)sbi->sbi_vec, (long)INTLEV(sbi->sbi_pri)); } return (UNCONF); } int sbus_match(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { struct mainbus_attach_args *ma = aux; return (strcmp(cf->cf_driver->cd_name, ma->ma_name) == 0); } /* * Attach an Sbus. */ void sbus_attach(parent, self, aux) struct device *parent; struct device *self; void *aux; { struct sbus_softc *sc = (struct sbus_softc *)self; struct mainbus_attach_args *ma = aux; int node = ma->ma_node; int node0, error; bus_space_tag_t sbt; struct sbus_attach_args sa; char *busname = "sbus"; struct bootpath *bp = ma->ma_bp; sc->sc_bustag = ma->ma_bustag; sc->sc_dmatag = ma->ma_dmatag; sc->sc_sysio = (struct sysioreg*)(u_long)ma->ma_address[0]; /* Use prom mapping for sysio. */ sc->sc_ign = ma->ma_interrupts[0] & INTMAP_IGN; /* Find interrupt group no */ /* Setup interrupt translation tables */ sc->sc_intr2ipl = CPU_ISSUN4C ? intr_sbus2ipl_4c : intr_sbus2ipl_4m; /* * Record clock frequency for synchronous SCSI. * IS THIS THE CORRECT DEFAULT?? */ sc->sc_clockfreq = getpropint(node, "clock-frequency", 25*1000*1000); printf(": clock = %s MHz\n", clockfreq(sc->sc_clockfreq)); sbt = sbus_alloc_bustag(sc); sc->sc_dmatag = sbus_alloc_dmatag(sc); /* * Get the SBus burst transfer size if burst transfers are supported */ sc->sc_burst = getpropint(node, "burst-sizes", 0); /* Propagate bootpath */ if (bp != NULL && strcmp(bp->name, busname) == 0) bp++; else bp = NULL; /* * Collect address translations from the OBP. */ error = getprop(node, "ranges", sizeof(struct sbus_range), &sc->sc_nrange, (void **)&sc->sc_range); if (error) panic("%s: error getting ranges property", sc->sc_dev.dv_xname); /* initailise the IOMMU */ /* punch in our copies */ sc->sc_is.is_bustag = sc->sc_bustag; sc->sc_is.is_iommu = &sc->sc_sysio->sys_iommu; sc->sc_is.is_sb = &sc->sc_sysio->sys_strbuf; #ifdef DEBUG if (sbusdebug & SDB_DVMA) printf("sysio base %p phys %p\n", (long)sc->sc_sysio, (long)pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_sysio)); #endif /* XXX should have instance number */ iommu_init("SBus dvma", &sc->sc_is, 0); /* * Loop through ROM children, fixing any relative addresses * and then configuring each device. * `specials' is an array of device names that are treated * specially: */ node0 = firstchild(node); for (node = node0; node; node = nextsibling(node)) { char *name = getpropstring(node, "name"); if (sbus_setup_attach_args(sc, sbt, sc->sc_dmatag, node, bp, &sa) != 0) { printf("sbus_attach: %s: incomplete\n", name); continue; } (void) config_found(&sc->sc_dev, (void *)&sa, sbus_print); sbus_destroy_attach_args(&sa); } } int sbus_setup_attach_args(sc, bustag, dmatag, node, bp, sa) struct sbus_softc *sc; bus_space_tag_t bustag; bus_dma_tag_t dmatag; int node; struct bootpath *bp; struct sbus_attach_args *sa; { /*struct sbus_reg sbusreg;*/ /*int base;*/ int error; int n; bzero(sa, sizeof(struct sbus_attach_args)); error = getprop(node, "name", 1, &n, (void **)&sa->sa_name); if (error != 0) return (error); sa->sa_name[n] = '\0'; sa->sa_bustag = bustag; sa->sa_dmatag = dmatag; sa->sa_node = node; sa->sa_bp = bp; error = getprop(node, "reg", sizeof(struct sbus_reg), &sa->sa_nreg, (void **)&sa->sa_reg); if (error != 0) { char buf[32]; if (error != ENOENT || !node_has_property(node, "device_type") || strcmp(getpropstringA(node, "device_type", buf), "hierarchical") != 0) return (error); } for (n = 0; n < sa->sa_nreg; n++) { /* Convert to relative addressing, if necessary */ u_int32_t base = sa->sa_reg[n].sbr_offset; if (SBUS_ABS(base)) { sa->sa_reg[n].sbr_slot = SBUS_ABS_TO_SLOT(base); sa->sa_reg[n].sbr_offset = SBUS_ABS_TO_OFFSET(base); } } if ((error = sbus_get_intr(sc, node, &sa->sa_intr, &sa->sa_nintr)) != 0) return (error); error = getprop(node, "address", sizeof(u_int32_t), &sa->sa_npromvaddrs, (void **)&sa->sa_promvaddrs); if (error != 0 && error != ENOENT) return (error); return (0); } void sbus_destroy_attach_args(sa) struct sbus_attach_args *sa; { if (sa->sa_name != NULL) free(sa->sa_name, M_DEVBUF); if (sa->sa_nreg != 0) free(sa->sa_reg, M_DEVBUF); if (sa->sa_intr) free(sa->sa_intr, M_DEVBUF); if (sa->sa_promvaddrs) free((void *)sa->sa_promvaddrs, M_DEVBUF); bzero(sa, sizeof(struct sbus_attach_args));/*DEBUG*/ } int _sbus_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 sbus_softc *sc = t->cookie; int64_t slot = btype; int i; for (i = 0; i < sc->sc_nrange; i++) { bus_addr_t paddr; if (sc->sc_range[i].cspace != slot) continue; /* We've found the connection to the parent bus */ paddr = sc->sc_range[i].poffset + offset; paddr |= ((bus_addr_t)sc->sc_range[i].pspace<<32); #ifdef DEBUG if (sbusdebug & SDB_DVMA) printf("\n_sbus_bus_map: mapping paddr slot %lx offset %lx poffset %lx paddr %lx\n", (long)slot, (long)offset, (long)sc->sc_range[i].poffset, (long)paddr); #endif return (bus_space_map2(sc->sc_bustag, 0, paddr, size, flags, vaddr, hp)); } return (EINVAL); } int sbus_bus_mmap(t, btype, paddr, flags, hp) bus_space_tag_t t; bus_type_t btype; bus_addr_t paddr; int flags; bus_space_handle_t *hp; { bus_addr_t offset = paddr; int slot = (paddr>>32); struct sbus_softc *sc = t->cookie; int i; for (i = 0; i < sc->sc_nrange; i++) { bus_addr_t paddr; if (sc->sc_range[i].cspace != slot) continue; paddr = sc->sc_range[i].poffset + offset; paddr |= ((bus_addr_t)sc->sc_range[i].pspace<<32); return (bus_space_mmap(sc->sc_bustag, 0, paddr, flags, hp)); } return (-1); } /* * Each attached device calls sbus_establish after it initializes * its sbusdev portion. */ void sbus_establish(sd, dev) register struct sbusdev *sd; register struct device *dev; { register struct sbus_softc *sc; register struct device *curdev; /* * We have to look for the sbus by name, since it is not necessarily * our immediate parent (i.e. sun4m /iommu/sbus/espdma/esp) * We don't just use the device structure of the above-attached * sbus, since we might (in the future) support multiple sbus's. */ for (curdev = dev->dv_parent; ; curdev = curdev->dv_parent) { if (!curdev || !curdev->dv_xname) panic("sbus_establish: can't find sbus parent for %s", sd->sd_dev->dv_xname ? sd->sd_dev->dv_xname : "" ); if (strncmp(curdev->dv_xname, "sbus", 4) == 0) break; } sc = (struct sbus_softc *) curdev; sd->sd_dev = dev; sd->sd_bchain = sc->sc_sbdev; sc->sc_sbdev = sd; } /* * Reset the given sbus. (???) */ void sbusreset(sbus) int sbus; { register struct sbusdev *sd; struct sbus_softc *sc = sbus_cd.cd_devs[sbus]; struct device *dev; printf("reset %s:", sc->sc_dev.dv_xname); for (sd = sc->sc_sbdev; sd != NULL; sd = sd->sd_bchain) { if (sd->sd_reset) { dev = sd->sd_dev; (*sd->sd_reset)(dev); printf(" %s", dev->dv_xname); } } /* Reload iommu regs */ iommu_reset(&sc->sc_is); } /* * Get interrupt attributes for an Sbus device. */ int sbus_get_intr(sc, node, ipp, np) struct sbus_softc *sc; int node; struct sbus_intr **ipp; int *np; { int *ipl; int i, n, error; char buf[32]; /* * The `interrupts' property contains the Sbus interrupt level. */ ipl = NULL; if (getprop(node, "interrupts", sizeof(int), np, (void **)&ipl) == 0) { /* Change format to an `struct sbus_intr' array */ struct sbus_intr *ip; /* Default to interrupt level 2 -- otherwise unused */ int pri = INTLEVENCODE(2); ip = malloc(*np * sizeof(struct sbus_intr), M_DEVBUF, M_NOWAIT); if (ip == NULL) return (ENOMEM); /* Now things get ugly. We need to take this value which is * the interrupt vector number and encode the IPL into it * somehow. Luckily, the interrupt vector has lots of free * space and we can easily stuff the IPL in there for a while. */ getpropstringA(node, "device_type", buf); if (!buf[0]) { getpropstringA(node, "name", buf); } for (i=0; intrmap[i].in_class; i++) { if (strcmp(intrmap[i].in_class, buf) == 0) { pri = INTLEVENCODE(intrmap[i].in_lev); break; } } for (n = 0; n < *np; n++) { /* * We encode vector and priority into sbi_pri so we * can pass them as a unit. This will go away if * sbus_establish ever takes an sbus_intr instead * of an integer level. * Stuff the real vector in sbi_vec. */ ip[n].sbi_pri = pri|ipl[n]; ip[n].sbi_vec = ipl[n]; } free(ipl, M_DEVBUF); *ipp = ip; return (0); } /* We really don't support the following */ /* printf("\nWARNING: sbus_get_intr() \"interrupts\" not found -- using \"intr\"\n"); */ /* And some devices don't even have interrupts */ /* * Fall back on `intr' property. */ *ipp = NULL; error = getprop(node, "intr", sizeof(struct sbus_intr), np, (void **)ipp); switch (error) { case 0: for (n = *np; n-- > 0;) { /* * Move the interrupt vector into place. * We could remap the level, but the SBUS priorities * are probably good enough. */ (*ipp)[n].sbi_vec = (*ipp)[n].sbi_pri; (*ipp)[n].sbi_pri |= INTLEVENCODE((*ipp)[n].sbi_pri); } break; case ENOENT: error = 0; break; } return (error); } /* * Install an interrupt handler for an Sbus device. */ void * sbus_intr_establish(t, level, flags, handler, arg) bus_space_tag_t t; int level; int flags; int (*handler) __P((void *)); void *arg; { struct sbus_softc *sc = t->cookie; struct intrhand *ih; int ipl; long vec = level; ih = (struct intrhand *) malloc(sizeof(struct intrhand), M_DEVBUF, M_NOWAIT); if (ih == NULL) return (NULL); if ((flags & BUS_INTR_ESTABLISH_SOFTINTR) != 0) ipl = vec; else if ((vec & SBUS_INTR_COMPAT) != 0) ipl = vec & ~SBUS_INTR_COMPAT; else { /* Decode and remove IPL */ ipl = INTLEV(vec); vec = INTVEC(vec); #ifdef DEBUG if (sbusdebug & SDB_INTR) { printf("\nsbus: intr[%ld]%lx: %lx\n", (long)ipl, (long)vec, intrlev[vec]); printf("Hunting for IRQ...\n"); } #endif if ((vec & INTMAP_OBIO) == 0) { /* We're in an SBUS slot */ /* Register the map and clear intr registers */ #ifdef DEBUG if (sbusdebug & SDB_INTR) { int64_t *intrptr = &(&sc->sc_sysio->sbus_slot0_int)[INTSLOT(vec)]; int64_t intrmap = *intrptr; printf("Found SBUS %lx IRQ as %llx in slot %ld\n", (long)vec, (long)intrmap, (long)INTSLOT(vec)); } #endif ih->ih_map = &(&sc->sc_sysio->sbus_slot0_int)[INTSLOT(vec)]; ih->ih_clr = &sc->sc_sysio->sbus0_clr_int[INTVEC(vec)]; /* Enable the interrupt */ vec |= INTMAP_V; /* Insert IGN */ vec |= sc->sc_ign; bus_space_write_8(sc->sc_bustag, ih->ih_map, 0, vec); } else { int64_t *intrptr = &sc->sc_sysio->scsi_int_map; int64_t intrmap = 0; int i; /* Insert IGN */ vec |= sc->sc_ign; for (i=0; &intrptr[i] <= (int64_t *)&sc->sc_sysio->reserved_int_map && INTVEC(intrmap=intrptr[i]) != INTVEC(vec); i++); if (INTVEC(intrmap) == INTVEC(vec)) { #ifdef DEBUG if (sbusdebug & SDB_INTR) printf("Found OBIO %lx IRQ as %lx in slot %d\n", vec, (long)intrmap, i); #endif /* Register the map and clear intr registers */ ih->ih_map = &intrptr[i]; intrptr = (int64_t *)&sc->sc_sysio->scsi_clr_int; ih->ih_clr = &intrptr[i]; /* Enable the interrupt */ intrmap |= INTMAP_V; bus_space_write_8(sc->sc_bustag, ih->ih_map, 0, (u_long)intrmap); } else panic("IRQ not found!"); } } #ifdef DEBUG if (sbusdebug & SDB_INTR) { long i; for (i=0; i<1400000000; i++); } #endif ih->ih_fun = handler; ih->ih_arg = arg; ih->ih_number = vec; ih->ih_pil = (1<cookie = sc; sbt->parent = sc->sc_bustag; sbt->type = SBUS_BUS_SPACE; sbt->sparc_bus_map = _sbus_bus_map; sbt->sparc_bus_mmap = sbus_bus_mmap; sbt->sparc_intr_establish = sbus_intr_establish; return (sbt); } static bus_dma_tag_t sbus_alloc_dmatag(sc) struct sbus_softc *sc; { bus_dma_tag_t sdt, psdt = sc->sc_dmatag; sdt = (bus_dma_tag_t) malloc(sizeof(struct sparc_bus_dma_tag), M_DEVBUF, M_NOWAIT); if (sdt == NULL) /* Panic? */ return (psdt); sdt->_cookie = sc; sdt->_parent = psdt; #define PCOPY(x) sdt->x = psdt->x PCOPY(_dmamap_create); PCOPY(_dmamap_destroy); sdt->_dmamap_load = sbus_dmamap_load; PCOPY(_dmamap_load_mbuf); PCOPY(_dmamap_load_uio); PCOPY(_dmamap_load_raw); sdt->_dmamap_unload = sbus_dmamap_unload; sdt->_dmamap_sync = sbus_dmamap_sync; sdt->_dmamem_alloc = sbus_dmamem_alloc; sdt->_dmamem_free = sbus_dmamem_free; sdt->_dmamem_map = sbus_dmamem_map; sdt->_dmamem_unmap = sbus_dmamem_unmap; PCOPY(_dmamem_mmap); #undef PCOPY sc->sc_dmatag = sdt; return (sdt); } int sbus_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; { int err, s; bus_size_t sgsize; paddr_t curaddr; u_long dvmaddr; vaddr_t vaddr = (vaddr_t)buf; pmap_t pmap; struct sbus_softc *sc = (struct sbus_softc *)t->_cookie; if (map->dm_nsegs) { /* Already in use?? */ #ifdef DIAGNOSTIC printf("sbus_dmamap_load: map still in use\n"); #endif bus_dmamap_unload(t, map); } /* * Make sure that on error condition we return "no valid mappings". */ map->dm_nsegs = 0; if (buflen > map->_dm_size) #ifdef DEBUG { printf("sbus_dmamap_load(): error %d > %d -- map size exceeded!\n", buflen, map->_dm_size); Debugger(); return (EINVAL); } #else return (EINVAL); #endif sgsize = round_page(buflen + ((int)vaddr & PGOFSET)); /* * XXX Need to implement "don't dma across this boundry". */ s = splhigh(); err = extent_alloc(sc->sc_is.is_dvmamap, sgsize, NBPG, map->_dm_boundary, EX_NOWAIT, (u_long *)&dvmaddr); splx(s); if (err != 0) return (err); #ifdef DEBUG if (dvmaddr == (bus_addr_t)-1) { printf("sbus_dmamap_load(): dvmamap_alloc(%d, %x) failed!\n", sgsize, flags); Debugger(); } #endif if (dvmaddr == (bus_addr_t)-1) return (ENOMEM); /* * We always use just one segment. */ map->dm_mapsize = buflen; map->dm_nsegs = 1; map->dm_segs[0].ds_addr = dvmaddr + (vaddr & PGOFSET); map->dm_segs[0].ds_len = sgsize; if (p != NULL) pmap = p->p_vmspace->vm_map.pmap; else pmap = pmap_kernel(); dvmaddr = trunc_page(map->dm_segs[0].ds_addr); sgsize = round_page(buflen + ((int)vaddr & PGOFSET)); for (; buflen > 0; ) { /* * Get the physical address for this page. */ if ((curaddr = (bus_addr_t)pmap_extract(pmap, (vaddr_t)vaddr)) == NULL) { bus_dmamap_unload(t, map); return (-1); } /* * Compute the segment size, and adjust counts. */ sgsize = NBPG - ((u_long)vaddr & PGOFSET); if (buflen < sgsize) sgsize = buflen; #ifdef DEBUG if (sbusdebug & SDB_DVMA) printf("sbus_dmamap_load: map %p loading va %lx at pa %lx\n", map, (long)dvmaddr, (long)(curaddr & ~(NBPG-1))); #endif iommu_enter(&sc->sc_is, trunc_page(dvmaddr), trunc_page(curaddr), flags); dvmaddr += PAGE_SIZE; vaddr += sgsize; buflen -= sgsize; } return (0); } void sbus_dmamap_unload(t, map) bus_dma_tag_t t; bus_dmamap_t map; { vaddr_t addr; int len, error, s; bus_addr_t dvmaddr; bus_size_t sgsize; struct sbus_softc *sc = (struct sbus_softc *)t->_cookie; if (map->dm_nsegs != 1) panic("sbus_dmamap_unload: nsegs = %d", map->dm_nsegs); addr = trunc_page(map->dm_segs[0].ds_addr); len = map->dm_segs[0].ds_len; #ifdef DEBUG if (sbusdebug & SDB_DVMA) printf("sbus_dmamap_unload: map %p removing va %lx size %lx\n", map, (long)addr, (long)len); #endif iommu_remove(&sc->sc_is, addr, len); dvmaddr = (map->dm_segs[0].ds_addr & ~PGOFSET); sgsize = map->dm_segs[0].ds_len; /* Mark the mappings as invalid. */ map->dm_mapsize = 0; map->dm_nsegs = 0; /* Unmapping is bus dependent */ s = splhigh(); error = extent_free(sc->sc_is.is_dvmamap, dvmaddr, sgsize, EX_NOWAIT); splx(s); if (error != 0) printf("warning: %ld of DVMA space lost\n", (long)sgsize); cache_flush((caddr_t)dvmaddr, (u_int) sgsize); } void sbus_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; { struct sbus_softc *sc = (struct sbus_softc *)t->_cookie; vaddr_t va = map->dm_segs[0].ds_addr + offset; /* * We only support one DMA segment; supporting more makes this code * too unweildy. */ if (ops&BUS_DMASYNC_PREREAD) { #ifdef DEBUG if (sbusdebug & SDB_DVMA) printf("sbus_dmamap_sync: syncing va %p len %lu BUS_DMASYNC_PREREAD\n", (long)va, (u_long)len); #endif /* Nothing to do */; } if (ops&BUS_DMASYNC_POSTREAD) { /* * We should sync the IOMMU streaming caches here first. */ #ifdef DEBUG if (sbusdebug & SDB_DVMA) printf("sbus_dmamap_sync: syncing va %p len %lu BUS_DMASYNC_POSTREAD\n", (long)va, (u_long)len); #endif while (len > 0) { /* * Streaming buffer flushes: * * 1 Tell strbuf to flush by storing va to strbuf_pgflush * If we're not on a cache line boundary (64-bits): * 2 Store 0 in flag * 3 Store pointer to flag in flushsync * 4 wait till flushsync becomes 0x1 * * If it takes more than .5 sec, something went wrong. */ #ifdef DEBUG if (sbusdebug & SDB_DVMA) printf("sbus_dmamap_sync: flushing va %p, %lu bytes left\n", (long)va, (u_long)len); #endif bus_space_write_8(sc->sc_bustag, &sc->sc_is.is_sb->strbuf_pgflush, 0, va); if (len <= NBPG) { iommu_flush(&sc->sc_is); len = 0; } else len -= NBPG; va += NBPG; } } if (ops&BUS_DMASYNC_PREWRITE) { #ifdef DEBUG if (sbusdebug & SDB_DVMA) printf("sbus_dmamap_sync: syncing va %p len %lu BUS_DMASYNC_PREWRITE\n", (long)va, (u_long)len); #endif /* Nothing to do */; } if (ops&BUS_DMASYNC_POSTWRITE) { #ifdef DEBUG if (sbusdebug & SDB_DVMA) printf("sbus_dmamap_sync: syncing va %p len %lu BUS_DMASYNC_POSTWRITE\n", (long)va, (u_long)len); #endif /* Nothing to do */; } bus_dmamap_sync(t->_parent, map, offset, len, ops); } /* * Take memory allocated by our parent bus and generate DVMA mappings for it. */ int sbus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags) bus_dma_tag_t t; bus_size_t size, alignment, boundary; bus_dma_segment_t *segs; int nsegs; int *rsegs; int flags; { paddr_t curaddr; u_long dvmaddr; vm_page_t m; struct pglist *mlist; int error; int n, s; struct sbus_softc *sc = (struct sbus_softc *)t->_cookie; if ((error = bus_dmamem_alloc(t->_parent, size, alignment, boundary, segs, nsegs, rsegs, flags))) return (error); /* * Allocate a DVMA mapping for our new memory. */ for (n = 0; n < *rsegs; n++) { #if 1 s = splhigh(); if (extent_alloc(sc->sc_is.is_dvmamap, segs[0].ds_len, alignment, boundary, EX_NOWAIT, (u_long *)&dvmaddr)) { splx(s); /* Free what we got and exit */ bus_dmamem_free(t->_parent, segs, nsegs); return (ENOMEM); } splx(s); #else dvmaddr = dvmamap_alloc(segs[0].ds_len, flags); if (dvmaddr == (bus_addr_t)-1) { /* Free what we got and exit */ bus_dmamem_free(t->_parent, segs, nsegs); return (ENOMEM); } #endif segs[n].ds_addr = dvmaddr; size = segs[n].ds_len; mlist = segs[n]._ds_mlist; /* Map memory into DVMA space */ for (m = mlist->tqh_first; m != NULL; m = m->pageq.tqe_next) { curaddr = VM_PAGE_TO_PHYS(m); #ifdef DEBUG if (sbusdebug & SDB_DVMA) printf("sbus_dmamem_alloc: map %p loading va %lx at pa %lx\n", (long)m, (long)dvmaddr, (long)(curaddr & ~(NBPG-1))); #endif iommu_enter(&sc->sc_is, dvmaddr, curaddr, flags); dvmaddr += PAGE_SIZE; } } return (0); } void sbus_dmamem_free(t, segs, nsegs) bus_dma_tag_t t; bus_dma_segment_t *segs; int nsegs; { vaddr_t addr; int len; int n, s, error; struct sbus_softc *sc = (struct sbus_softc *)t->_cookie; for (n=0; nsc_is, addr, len); #if 1 s = splhigh(); error = extent_free(sc->sc_is.is_dvmamap, addr, len, EX_NOWAIT); splx(s); if (error != 0) printf("warning: %ld of DVMA space lost\n", (long)len); #else dvmamap_free(addr, len); #endif } bus_dmamem_free(t->_parent, segs, nsegs); } /* * Map the DVMA mappings into the kernel pmap. * Check the flags to see whether we're streaming or coherent. */ int sbus_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; { vm_page_t m; vaddr_t va; bus_addr_t addr; struct pglist *mlist; int cbit; /* * digest flags: */ cbit = 0; if (flags & BUS_DMA_COHERENT) /* Disable vcache */ cbit |= PMAP_NVC; if (flags & BUS_DMA_NOCACHE) /* sideffects */ cbit |= PMAP_NC; /* * Now take this and map it into the CPU since it should already * be in the the IOMMU. */ *kvap = (caddr_t)va = segs[0].ds_addr; mlist = segs[0]._ds_mlist; for (m = mlist->tqh_first; m != NULL; m = m->pageq.tqe_next) { if (size == 0) panic("_bus_dmamem_map: size botch"); addr = VM_PAGE_TO_PHYS(m); pmap_enter(pmap_kernel(), va, addr | cbit, VM_PROT_READ | VM_PROT_WRITE, TRUE, VM_PROT_READ | VM_PROT_WRITE); va += PAGE_SIZE; size -= PAGE_SIZE; } return (0); } /* * Unmap DVMA mappings from kernel */ void sbus_dmamem_unmap(t, kva, size) bus_dma_tag_t t; caddr_t kva; size_t size; { #ifdef DIAGNOSTIC if ((u_long)kva & PGOFSET) panic("_bus_dmamem_unmap"); #endif size = round_page(size); pmap_remove(pmap_kernel(), (vaddr_t)kva, size); }