/* $NetBSD: intio.c,v 1.9 2001/08/26 12:14:22 mrg Exp $ */ /*- * Copyright (c) 1998 NetBSD Foundation, Inc. * 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. 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. */ /* * NetBSD/x68k internal I/O virtual bus. */ #include #include #include #include #include #include #include #include #include #include #include #include /* * bus_space(9) interface */ static int intio_bus_space_map __P((bus_space_tag_t, bus_addr_t, bus_size_t, int, bus_space_handle_t *)); static void intio_bus_space_unmap __P((bus_space_tag_t, bus_space_handle_t, bus_size_t)); static int intio_bus_space_subregion __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_size_t, bus_space_handle_t *)); static struct x68k_bus_space intio_bus = { #if 0 X68K_INTIO_BUS, #endif intio_bus_space_map, intio_bus_space_unmap, intio_bus_space_subregion, x68k_bus_space_alloc, x68k_bus_space_free, #if 0 x68k_bus_space_barrier, #endif 0 }; /* * bus_dma(9) interface */ #define INTIO_DMA_BOUNCE_THRESHOLD (16 * 1024 * 1024) int _intio_bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, bus_size_t, bus_size_t, int, bus_dmamap_t *)); void _intio_bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t)); int _intio_bus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int)); int _intio_bus_dmamap_load_mbuf __P((bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int)); int _intio_bus_dmamap_load_uio __P((bus_dma_tag_t, bus_dmamap_t, struct uio *, int)); int _intio_bus_dmamap_load_raw __P((bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int)); void _intio_bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t)); void _intio_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int)); int _intio_bus_dmamem_alloc __P((bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t, bus_dma_segment_t *, int, int *, int)); int _intio_dma_alloc_bouncebuf __P((bus_dma_tag_t, bus_dmamap_t, bus_size_t, int)); void _intio_dma_free_bouncebuf __P((bus_dma_tag_t, bus_dmamap_t)); struct x68k_bus_dma intio_bus_dma = { INTIO_DMA_BOUNCE_THRESHOLD, _intio_bus_dmamap_create, _intio_bus_dmamap_destroy, _intio_bus_dmamap_load, _intio_bus_dmamap_load_mbuf, _intio_bus_dmamap_load_uio, _intio_bus_dmamap_load_raw, _intio_bus_dmamap_unload, _intio_bus_dmamap_sync, _intio_bus_dmamem_alloc, x68k_bus_dmamem_free, x68k_bus_dmamem_map, x68k_bus_dmamem_unmap, x68k_bus_dmamem_mmap, }; /* * autoconf stuff */ static int intio_match __P((struct device *, struct cfdata *, void *)); static void intio_attach __P((struct device *, struct device *, void *)); static int intio_search __P((struct device *, struct cfdata *cf, void *)); static int intio_print __P((void *, const char *)); static void intio_alloc_system_ports __P((struct intio_softc*)); struct cfattach intio_ca = { sizeof(struct intio_softc), intio_match, intio_attach }; static struct intio_interrupt_vector { intio_intr_handler_t iiv_handler; void *iiv_arg; int iiv_intrcntoff; } iiv[256] = {{0,},}; extern struct cfdriver intio_cd; /* used in console initialization */ extern int x68k_realconfig; int x68k_config_found __P((struct cfdata *, struct device *, void *, cfprint_t)); static struct cfdata *cfdata_intiobus = NULL; /* other static functions */ static int scan_intrnames __P((const char *)); #ifdef DEBUG int intio_debug = 0; #endif static int intio_match(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; /* NULL */ { if (strcmp(aux, intio_cd.cd_name) != 0) return (0); if (cf->cf_unit != 0) return (0); if (x68k_realconfig == 0) cfdata_intiobus = cf; /* XXX */ return (1); } /* used in console initialization: configure only MFP */ static struct intio_attach_args initial_ia = { &intio_bus, 0/*XXX*/, "mfp", /* ia_name */ MFP_ADDR, /* ia_addr */ 0x30, /* ia_size */ MFP_INTR, /* ia_intr */ -1 /* ia_dma */ -1, /* ia_dmaintr */ }; static void intio_attach(parent, self, aux) struct device *parent, *self; void *aux; /* NULL */ { struct intio_softc *sc = (struct intio_softc *)self; struct intio_attach_args ia; if (self == NULL) { /* console only init */ x68k_config_found(cfdata_intiobus, NULL, &initial_ia, NULL); return; } printf (" mapped at %8p\n", intiobase); sc->sc_map = extent_create("intiomap", PHYS_INTIODEV, PHYS_INTIODEV + 0x400000, M_DEVBUF, NULL, NULL, EX_NOWAIT); intio_alloc_system_ports (sc); sc->sc_bst = &intio_bus; sc->sc_bst->x68k_bus_device = self; sc->sc_dmat = &intio_bus_dma; sc->sc_dmac = 0; bzero(iiv, sizeof (struct intio_interrupt_vector) * 256); ia.ia_bst = sc->sc_bst; ia.ia_dmat = sc->sc_dmat; config_search (intio_search, self, &ia); } static int intio_search(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { struct intio_attach_args *ia = aux; struct intio_softc *sc = (struct intio_softc *)parent; ia->ia_bst = sc->sc_bst; ia->ia_dmat = sc->sc_dmat; ia->ia_name = cf->cf_driver->cd_name; ia->ia_addr = cf->cf_addr; ia->ia_intr = cf->cf_intr; ia->ia_dma = cf->cf_dma; ia->ia_dmaintr = cf->cf_dmaintr; if ((*cf->cf_attach->ca_match)(parent, cf, ia) > 0) config_attach(parent, cf, ia, intio_print); return (0); } static int intio_print(aux, name) void *aux; const char *name; { struct intio_attach_args *ia = aux; /* if (ia->ia_addr > 0) */ printf (" addr 0x%06x", ia->ia_addr); if (ia->ia_intr > 0) printf (" intr 0x%02x", ia->ia_intr); if (ia->ia_dma >= 0) { printf (" using DMA ch%d", ia->ia_dma); if (ia->ia_dmaintr > 0) printf (" intr 0x%02x and 0x%02x", ia->ia_dmaintr, ia->ia_dmaintr+1); } return (QUIET); } /* * intio memory map manager */ int intio_map_allocate_region(parent, ia, flag) struct device *parent; struct intio_attach_args *ia; enum intio_map_flag flag; /* INTIO_MAP_TESTONLY or INTIO_MAP_ALLOCATE */ { struct intio_softc *sc = (struct intio_softc*) parent; struct extent *map = sc->sc_map; int r; r = extent_alloc_region (map, ia->ia_addr, ia->ia_size, 0); #ifdef DEBUG if (intio_debug) extent_print (map); #endif if (r == 0) { if (flag != INTIO_MAP_ALLOCATE) extent_free (map, ia->ia_addr, ia->ia_size, 0); return 0; } return -1; } int intio_map_free_region(parent, ia) struct device *parent; struct intio_attach_args *ia; { struct intio_softc *sc = (struct intio_softc*) parent; struct extent *map = sc->sc_map; extent_free (map, ia->ia_addr, ia->ia_size, 0); #ifdef DEBUG if (intio_debug) extent_print (map); #endif return 0; } void intio_alloc_system_ports(sc) struct intio_softc *sc; { extent_alloc_region (sc->sc_map, INTIO_SYSPORT, 16, 0); extent_alloc_region (sc->sc_map, INTIO_SICILIAN, 0x2000, 0); } /* * intio bus space stuff. */ static int intio_bus_space_map(t, bpa, size, flags, bshp) bus_space_tag_t t; bus_addr_t bpa; bus_size_t size; int flags; bus_space_handle_t *bshp; { /* * Intio bus is mapped permanently. */ *bshp = (bus_space_handle_t) ((u_int) bpa - PHYS_INTIODEV + intiobase); /* * Some devices are mapped on odd addresses only. */ if (flags & BUS_SPACE_MAP_SHIFTED) *bshp += 0x80000001; return (0); } static void intio_bus_space_unmap(t, bsh, size) bus_space_tag_t t; bus_space_handle_t bsh; bus_size_t size; { return; } static int intio_bus_space_subregion(t, bsh, offset, size, nbshp) bus_space_tag_t t; bus_space_handle_t bsh; bus_size_t offset, size; bus_space_handle_t *nbshp; { *nbshp = bsh + offset; return (0); } /* * interrupt handler */ int intio_intr_establish (vector, name, handler, arg) int vector; const char *name; /* XXX */ intio_intr_handler_t handler; void *arg; { if (vector < 16) panic ("Invalid interrupt vector"); if (iiv[vector].iiv_handler) return EBUSY; iiv[vector].iiv_handler = handler; iiv[vector].iiv_arg = arg; iiv[vector].iiv_intrcntoff = scan_intrnames(name); return 0; } static int scan_intrnames (name) const char *name; { extern char intrnames[]; extern char eintrnames[]; int r = 0; char *p = &intrnames[0]; for (;;) { if (*p == 0) { /* new intr */ if (p + strlen(name) >= eintrnames) panic ("Interrupt statics buffer overrun."); strcpy (p, name); break; } if (strcmp(p, name) == 0) break; r++; while (*p++ != 0); } return r; } int intio_intr_disestablish (vector, arg) int vector; void *arg; { if (iiv[vector].iiv_handler == 0 || iiv[vector].iiv_arg != arg) return EINVAL; iiv[vector].iiv_handler = 0; iiv[vector].iiv_arg = 0; return 0; } int intio_intr (frame) struct frame *frame; { int vector = frame->f_vector / 4; extern int intrcnt[]; #if 0 /* this is not correct now */ /* CAUTION: HERE WE ARE IN SPLHIGH() */ /* LOWER TO APPROPRIATE IPL AT VERY FIRST IN THE HANDLER!! */ #endif if (iiv[vector].iiv_handler == 0) { printf ("Stray interrupt: %d type %x\n", vector, frame->f_format); return 0; } intrcnt[iiv[vector].iiv_intrcntoff]++; return (*(iiv[vector].iiv_handler)) (iiv[vector].iiv_arg); } /* * Intio I/O controler interrupt */ static u_int8_t intio_ivec = 0; void intio_set_ivec (vec) int vec; { vec &= 0xfc; if (intio_ivec && intio_ivec != (vec & 0xfc)) panic ("Wrong interrupt vector for Sicilian."); intio_ivec = vec; intio_set_sicilian_ivec(vec); } /* * intio bus dma stuff. stolen from arch/i386/isa/isa_machdep.c */ /* * Create an INTIO DMA map. */ int _intio_bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, flags, dmamp) bus_dma_tag_t t; bus_size_t size; int nsegments; bus_size_t maxsegsz; bus_size_t boundary; int flags; bus_dmamap_t *dmamp; { struct intio_dma_cookie *cookie; bus_dmamap_t map; int error, cookieflags; void *cookiestore; size_t cookiesize; extern paddr_t avail_end; /* Call common function to create the basic map. */ error = x68k_bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, flags, dmamp); if (error) return (error); map = *dmamp; map->x68k_dm_cookie = NULL; cookiesize = sizeof(struct intio_dma_cookie); /* * INTIO only has 24-bits of address space. This means * we can't DMA to pages over 16M. In order to DMA to * arbitrary buffers, we use "bounce buffers" - pages * in memory below the 16M boundary. On DMA reads, * DMA happens to the bounce buffers, and is copied into * the caller's buffer. On writes, data is copied into * but bounce buffer, and the DMA happens from those * pages. To software using the DMA mapping interface, * this looks simply like a data cache. * * If we have more than 16M of RAM in the system, we may * need bounce buffers. We check and remember that here. * * ...or, there is an opposite case. The most segments * a transfer will require is (maxxfer / NBPG) + 1. If * the caller can't handle that many segments (e.g. the * DMAC), we may have to bounce it as well. */ if (avail_end <= t->_bounce_thresh) /* Bouncing not necessary due to memory size. */ map->x68k_dm_bounce_thresh = 0; cookieflags = 0; if (map->x68k_dm_bounce_thresh != 0 || ((map->x68k_dm_size / NBPG) + 1) > map->x68k_dm_segcnt) { cookieflags |= ID_MIGHT_NEED_BOUNCE; cookiesize += (sizeof(bus_dma_segment_t) * map->x68k_dm_segcnt); } /* * Allocate our cookie. */ if ((cookiestore = malloc(cookiesize, M_DMAMAP, (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL) { error = ENOMEM; goto out; } memset(cookiestore, 0, cookiesize); cookie = (struct intio_dma_cookie *)cookiestore; cookie->id_flags = cookieflags; map->x68k_dm_cookie = cookie; if (cookieflags & ID_MIGHT_NEED_BOUNCE) { /* * Allocate the bounce pages now if the caller * wishes us to do so. */ if ((flags & BUS_DMA_ALLOCNOW) == 0) goto out; error = _intio_dma_alloc_bouncebuf(t, map, size, flags); } out: if (error) { if (map->x68k_dm_cookie != NULL) free(map->x68k_dm_cookie, M_DMAMAP); x68k_bus_dmamap_destroy(t, map); } return (error); } /* * Destroy an INTIO DMA map. */ void _intio_bus_dmamap_destroy(t, map) bus_dma_tag_t t; bus_dmamap_t map; { struct intio_dma_cookie *cookie = map->x68k_dm_cookie; /* * Free any bounce pages this map might hold. */ if (cookie->id_flags & ID_HAS_BOUNCE) _intio_dma_free_bouncebuf(t, map); free(cookie, M_DMAMAP); x68k_bus_dmamap_destroy(t, map); } /* * Load an INTIO DMA map with a linear buffer. */ int _intio_bus_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; { struct intio_dma_cookie *cookie = map->x68k_dm_cookie; int error; /* * Make sure that on error condition we return "no valid mappings." */ map->dm_mapsize = 0; map->dm_nsegs = 0; /* * Try to load the map the normal way. If this errors out, * and we can bounce, we will. */ error = x68k_bus_dmamap_load(t, map, buf, buflen, p, flags); if (error == 0 || (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0)) return (error); /* * Allocate bounce pages, if necessary. */ if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) { error = _intio_dma_alloc_bouncebuf(t, map, buflen, flags); if (error) return (error); } /* * Cache a pointer to the caller's buffer and load the DMA map * with the bounce buffer. */ cookie->id_origbuf = buf; cookie->id_origbuflen = buflen; cookie->id_buftype = ID_BUFTYPE_LINEAR; error = x68k_bus_dmamap_load(t, map, cookie->id_bouncebuf, buflen, p, flags); if (error) { /* * Free the bounce pages, unless our resources * are reserved for our exclusive use. */ if ((map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) _intio_dma_free_bouncebuf(t, map); return (error); } /* ...so _intio_bus_dmamap_sync() knows we're bouncing */ cookie->id_flags |= ID_IS_BOUNCING; return (0); } /* * Like _intio_bus_dmamap_load(), but for mbufs. */ int _intio_bus_dmamap_load_mbuf(t, map, m0, flags) bus_dma_tag_t t; bus_dmamap_t map; struct mbuf *m0; int flags; { struct intio_dma_cookie *cookie = map->x68k_dm_cookie; int error; /* * Make sure on error condition we return "no valid mappings." */ map->dm_mapsize = 0; map->dm_nsegs = 0; #ifdef DIAGNOSTIC if ((m0->m_flags & M_PKTHDR) == 0) panic("_intio_bus_dmamap_load_mbuf: no packet header"); #endif if (m0->m_pkthdr.len > map->x68k_dm_size) return (EINVAL); /* * Try to load the map the normal way. If this errors out, * and we can bounce, we will. */ error = x68k_bus_dmamap_load_mbuf(t, map, m0, flags); if (error == 0 || (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0)) return (error); /* * Allocate bounce pages, if necessary. */ if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) { error = _intio_dma_alloc_bouncebuf(t, map, m0->m_pkthdr.len, flags); if (error) return (error); } /* * Cache a pointer to the caller's buffer and load the DMA map * with the bounce buffer. */ cookie->id_origbuf = m0; cookie->id_origbuflen = m0->m_pkthdr.len; /* not really used */ cookie->id_buftype = ID_BUFTYPE_MBUF; error = x68k_bus_dmamap_load(t, map, cookie->id_bouncebuf, m0->m_pkthdr.len, NULL, flags); if (error) { /* * Free the bounce pages, unless our resources * are reserved for our exclusive use. */ if ((map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) _intio_dma_free_bouncebuf(t, map); return (error); } /* ...so _intio_bus_dmamap_sync() knows we're bouncing */ cookie->id_flags |= ID_IS_BOUNCING; return (0); } /* * Like _intio_bus_dmamap_load(), but for uios. */ int _intio_bus_dmamap_load_uio(t, map, uio, flags) bus_dma_tag_t t; bus_dmamap_t map; struct uio *uio; int flags; { panic("_intio_bus_dmamap_load_uio: not implemented"); } /* * Like _intio_bus_dmamap_load(), but for raw memory allocated with * bus_dmamem_alloc(). */ int _intio_bus_dmamap_load_raw(t, map, segs, nsegs, size, flags) bus_dma_tag_t t; bus_dmamap_t map; bus_dma_segment_t *segs; int nsegs; bus_size_t size; int flags; { panic("_intio_bus_dmamap_load_raw: not implemented"); } /* * Unload an INTIO DMA map. */ void _intio_bus_dmamap_unload(t, map) bus_dma_tag_t t; bus_dmamap_t map; { struct intio_dma_cookie *cookie = map->x68k_dm_cookie; /* * If we have bounce pages, free them, unless they're * reserved for our exclusive use. */ if ((cookie->id_flags & ID_HAS_BOUNCE) && (map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) _intio_dma_free_bouncebuf(t, map); cookie->id_flags &= ~ID_IS_BOUNCING; cookie->id_buftype = ID_BUFTYPE_INVALID; /* * Do the generic bits of the unload. */ x68k_bus_dmamap_unload(t, map); } /* * Synchronize an INTIO DMA map. */ void _intio_bus_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 intio_dma_cookie *cookie = map->x68k_dm_cookie; /* * Mixing PRE and POST operations is not allowed. */ if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0 && (ops & (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE)) != 0) panic("_intio_bus_dmamap_sync: mix PRE and POST"); #ifdef DIAGNOSTIC if ((ops & (BUS_DMASYNC_PREWRITE|BUS_DMASYNC_POSTREAD)) != 0) { if (offset >= map->dm_mapsize) panic("_intio_bus_dmamap_sync: bad offset"); if (len == 0 || (offset + len) > map->dm_mapsize) panic("_intio_bus_dmamap_sync: bad length"); } #endif /* * If we're not bouncing, just return; nothing to do. */ if ((cookie->id_flags & ID_IS_BOUNCING) == 0) return; switch (cookie->id_buftype) { case ID_BUFTYPE_LINEAR: /* * Nothing to do for pre-read. */ if (ops & BUS_DMASYNC_PREWRITE) { /* * Copy the caller's buffer to the bounce buffer. */ memcpy((char *)cookie->id_bouncebuf + offset, (char *)cookie->id_origbuf + offset, len); } if (ops & BUS_DMASYNC_POSTREAD) { /* * Copy the bounce buffer to the caller's buffer. */ memcpy((char *)cookie->id_origbuf + offset, (char *)cookie->id_bouncebuf + offset, len); } /* * Nothing to do for post-write. */ break; case ID_BUFTYPE_MBUF: { struct mbuf *m, *m0 = cookie->id_origbuf; bus_size_t minlen, moff; /* * Nothing to do for pre-read. */ if (ops & BUS_DMASYNC_PREWRITE) { /* * Copy the caller's buffer to the bounce buffer. */ m_copydata(m0, offset, len, (char *)cookie->id_bouncebuf + offset); } if (ops & BUS_DMASYNC_POSTREAD) { /* * Copy the bounce buffer to the caller's buffer. */ for (moff = offset, m = m0; m != NULL && len != 0; m = m->m_next) { /* Find the beginning mbuf. */ if (moff >= m->m_len) { moff -= m->m_len; continue; } /* * Now at the first mbuf to sync; nail * each one until we have exhausted the * length. */ minlen = len < m->m_len - moff ? len : m->m_len - moff; memcpy(mtod(m, caddr_t) + moff, (char *)cookie->id_bouncebuf + offset, minlen); moff = 0; len -= minlen; offset += minlen; } } /* * Nothing to do for post-write. */ break; } case ID_BUFTYPE_UIO: panic("_intio_bus_dmamap_sync: ID_BUFTYPE_UIO"); break; case ID_BUFTYPE_RAW: panic("_intio_bus_dmamap_sync: ID_BUFTYPE_RAW"); break; case ID_BUFTYPE_INVALID: panic("_intio_bus_dmamap_sync: ID_BUFTYPE_INVALID"); break; default: printf("unknown buffer type %d\n", cookie->id_buftype); panic("_intio_bus_dmamap_sync"); } } /* * Allocate memory safe for INTIO DMA. */ int _intio_bus_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 high; extern paddr_t avail_end; if (avail_end > INTIO_DMA_BOUNCE_THRESHOLD) high = trunc_page(INTIO_DMA_BOUNCE_THRESHOLD); else high = trunc_page(avail_end); return (x68k_bus_dmamem_alloc_range(t, size, alignment, boundary, segs, nsegs, rsegs, flags, 0, high)); } /********************************************************************** * INTIO DMA utility functions **********************************************************************/ int _intio_dma_alloc_bouncebuf(t, map, size, flags) bus_dma_tag_t t; bus_dmamap_t map; bus_size_t size; int flags; { struct intio_dma_cookie *cookie = map->x68k_dm_cookie; int error = 0; cookie->id_bouncebuflen = round_page(size); error = _intio_bus_dmamem_alloc(t, cookie->id_bouncebuflen, NBPG, map->x68k_dm_boundary, cookie->id_bouncesegs, map->x68k_dm_segcnt, &cookie->id_nbouncesegs, flags); if (error) goto out; error = x68k_bus_dmamem_map(t, cookie->id_bouncesegs, cookie->id_nbouncesegs, cookie->id_bouncebuflen, (caddr_t *)&cookie->id_bouncebuf, flags); out: if (error) { x68k_bus_dmamem_free(t, cookie->id_bouncesegs, cookie->id_nbouncesegs); cookie->id_bouncebuflen = 0; cookie->id_nbouncesegs = 0; } else { cookie->id_flags |= ID_HAS_BOUNCE; } return (error); } void _intio_dma_free_bouncebuf(t, map) bus_dma_tag_t t; bus_dmamap_t map; { struct intio_dma_cookie *cookie = map->x68k_dm_cookie; x68k_bus_dmamem_unmap(t, cookie->id_bouncebuf, cookie->id_bouncebuflen); x68k_bus_dmamem_free(t, cookie->id_bouncesegs, cookie->id_nbouncesegs); cookie->id_bouncebuflen = 0; cookie->id_nbouncesegs = 0; cookie->id_flags &= ~ID_HAS_BOUNCE; }