/* $NetBSD: intio.c,v 1.52 2022/05/26 14:33:29 tsutsui Exp $ */ /*- * Copyright (c) 1998 The 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. * * 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 __KERNEL_RCSID(0, "$NetBSD: intio.c,v 1.52 2022/05/26 14:33:29 tsutsui Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include "ioconf.h" /* * bus_space(9) interface */ static int intio_bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, bus_space_handle_t *); static void intio_bus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t); static int intio_bus_space_subregion(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(bus_dma_tag_t, bus_size_t, int, bus_size_t, bus_size_t, int, bus_dmamap_t *); void _intio_bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); int _intio_bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int); int _intio_bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); int _intio_bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); int _intio_bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int); void _intio_bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); void _intio_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int); int _intio_bus_dmamem_alloc(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(bus_dma_tag_t, bus_dmamap_t, bus_size_t, int); void _intio_dma_free_bouncebuf(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(device_t, cfdata_t, void *); static void intio_attach(device_t, device_t, void *); static int intio_search(device_t, cfdata_t, const int *, void *); static int intio_print(void *, const char *); static void intio_alloc_system_ports(struct intio_softc*); CFATTACH_DECL_NEW(intio, sizeof(struct intio_softc), intio_match, intio_attach, NULL, NULL); static int intio_attached; static struct intio_interrupt_vector { intio_intr_handler_t iiv_handler; void *iiv_arg; struct evcnt *iiv_evcnt; } iiv[256] = {{0,},}; #ifdef DEBUG int intio_debug = 0; #endif static int intio_match(device_t parent, cfdata_t cf, void *aux) { if (strcmp(aux, intio_cd.cd_name) != 0) return (0); if (intio_attached) return (0); return (1); } static void intio_attach(device_t parent, device_t self, void *aux) { struct intio_softc *sc = device_private(self); struct intio_attach_args ia; intio_attached = 1; aprint_normal(" mapped at %8p\n", intiobase); sc->sc_map = extent_create("intiomap", INTIOBASE, INTIOBASE + 0x400000, NULL, 0, EX_WAITOK); 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; memset(iiv, 0, sizeof(struct intio_interrupt_vector) * 256); ia.ia_bst = sc->sc_bst; ia.ia_dmat = sc->sc_dmat; config_search(self, &ia, CFARGS(.search = intio_search)); } static int intio_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) { struct intio_softc *sc = device_private(parent); struct intio_attach_args *ia = aux; ia->ia_bst = sc->sc_bst; ia->ia_dmat = sc->sc_dmat; ia->ia_name = cf->cf_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 (config_probe(parent, cf, ia)) config_attach(parent, cf, ia, intio_print, CFARGS_NONE); return (0); } static int intio_print(void *aux, const char *name) { struct intio_attach_args *ia = aux; /* if (ia->ia_addr > 0) */ aprint_normal(" addr 0x%06x", ia->ia_addr); if (ia->ia_intr > 0) aprint_normal(" intr 0x%02x", ia->ia_intr); if (ia->ia_dma >= 0) { aprint_normal(" using DMA ch%d", ia->ia_dma); if (ia->ia_dmaintr > 0) aprint_normal(" intr 0x%02x and 0x%02x", ia->ia_dmaintr, ia->ia_dmaintr+1); } return (QUIET); } /* * intio memory map manager */ int intio_map_allocate_region(device_t parent, struct intio_attach_args *ia, enum intio_map_flag flag) { struct intio_softc *sc = device_private(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(device_t parent, struct intio_attach_args *ia) { struct intio_softc *sc = device_private(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(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(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)IIOV(bpa); /* * Some devices are mapped on odd or even addresses only. */ if ((flags & BUS_SPACE_MAP_SHIFTED_MASK) == BUS_SPACE_MAP_SHIFTED_ODD) *bshp += 0x80000001; if ((flags & BUS_SPACE_MAP_SHIFTED_MASK) == BUS_SPACE_MAP_SHIFTED_EVEN) *bshp += 0x80000000; return (0); } static void intio_bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size) { return; } static int intio_bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) { *nbshp = bsh + offset; return (0); } /* * interrupt handler */ int intio_intr_establish(int vector, const char *name, intio_intr_handler_t handler, void *arg) { return intio_intr_establish_ext(vector, name, "intr", handler, arg); } int intio_intr_establish_ext(int vector, const char *name1, const char *name2, intio_intr_handler_t handler, void *arg) { struct evcnt *evcnt; if (vector < 16) panic("Invalid interrupt vector"); if (iiv[vector].iiv_handler) return EBUSY; evcnt = malloc(sizeof(*evcnt), M_DEVBUF, M_WAITOK); evcnt_attach_dynamic(evcnt, EVCNT_TYPE_INTR, NULL, name1, name2); iiv[vector].iiv_handler = handler; iiv[vector].iiv_arg = arg; iiv[vector].iiv_evcnt = evcnt; return 0; } int intio_intr_disestablish(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; evcnt_detach(iiv[vector].iiv_evcnt); free(iiv[vector].iiv_evcnt, M_DEVBUF); return 0; } int intio_intr(struct frame *frame) { int vector = frame->f_vector / 4; if (iiv[vector].iiv_handler == 0) { printf("Stray interrupt: %d type %x, pc %x\n", vector, frame->f_format, frame->f_pc); return 0; } iiv[vector].iiv_evcnt->ev_count++; return (*(iiv[vector].iiv_handler))(iiv[vector].iiv_arg); } /* * Intio I/O controller interrupt */ static u_int8_t intio_ivec = 0; void intio_set_ivec(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(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; 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 * the 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 / PAGE_SIZE) + 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 / PAGE_SIZE) + 1) > map->x68k_dm_segcnt) { cookieflags |= ID_MIGHT_NEED_BOUNCE; cookiesize += (sizeof(bus_dma_segment_t) * map->x68k_dm_segcnt); } /* * Allocate our cookie. */ cookie = malloc(cookiesize, M_DMAMAP, ((flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK) | M_ZERO); if (cookie == NULL) { error = ENOMEM; goto out; } 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(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(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 || (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(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 || (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(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(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(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(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, char *) + 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(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) { 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(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, PAGE_SIZE, 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, (void **)&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(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; }