Sync w/ i386 port:
Implement bounce buffers for mbufs. Also, correct copyright snafus, and a forgot-o left over from a commit I made yesterday.
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thorpej
parent
6d29690288
commit
52450409d6
@ -1,4 +1,41 @@
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/* $NetBSD: isa_machdep.h,v 1.3 1998/02/03 04:32:17 sakamoto Exp $ */
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/* $NetBSD: isa_machdep.h,v 1.4 1998/06/03 21:52:36 thorpej Exp $ */
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/*-
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* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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@ -88,9 +125,15 @@ extern struct bebox_bus_dma_tag isa_bus_dma_tag;
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struct bebox_isa_dma_cookie {
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int id_flags; /* flags; see below */
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/*
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* Information about the original buffer used during
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* DMA map syncs. Note that origbuflen is only used
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* for ID_BUFTYPE_LINEAR.
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*/
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void *id_origbuf; /* pointer to orig buffer if
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bouncing */
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bus_size_t id_origbuflen; /* ...and size */
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int id_buftype; /* type of buffer */
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void *id_bouncebuf; /* pointer to the bounce buffer */
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bus_size_t id_bouncebuflen; /* ...and size */
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@ -104,6 +147,12 @@ struct bebox_isa_dma_cookie {
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#define ID_HAS_BOUNCE 0x02 /* map currently has bounce buffers */
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#define ID_IS_BOUNCING 0x04 /* map is bouncing current xfer */
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/* id_buftype */
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#define ID_BUFTYPE_INVALID 0
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#define ID_BUFTYPE_LINEAR 1
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#define ID_BUFTYPE_MBUF 2
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#define ID_BUFTYPE_UIO 3
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#define ID_BUFTYPE_RAW 4
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/*
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* XXX Various seemingly PC-specific constants, some of which may be
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@ -1,4 +1,4 @@
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/* $NetBSD: isadma_machdep.c,v 1.8 1998/06/03 06:43:04 thorpej Exp $ */
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/* $NetBSD: isadma_machdep.c,v 1.9 1998/06/03 21:52:36 thorpej Exp $ */
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#define ISA_DMA_STATS
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@ -39,51 +39,13 @@
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1993, 1994, 1996, 1997 Charles M. Hannum. All rights reserved.
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)isa.c 7.2 (Berkeley) 5/13/91
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/syslog.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/mbuf.h>
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#define _BEBOX_BUS_DMA_PRIVATE
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#include <machine/bus.h>
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@ -140,7 +102,6 @@ void _isa_dma_free_bouncebuf __P((bus_dma_tag_t, bus_dmamap_t));
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*/
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struct bebox_bus_dma_tag isa_bus_dma_tag = {
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ISA_DMA_BOUNCE_THRESHOLD,
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NULL, /* _cookie */
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_isa_bus_dmamap_create,
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_isa_bus_dmamap_destroy,
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_isa_bus_dmamap_load,
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@ -342,6 +303,7 @@ _isa_bus_dmamap_load(t, map, buf, buflen, p, flags)
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*/
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cookie->id_origbuf = buf;
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cookie->id_origbuflen = buflen;
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cookie->id_buftype = ID_BUFTYPE_LINEAR;
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error = _bus_dmamap_load(t, map, cookie->id_bouncebuf, buflen,
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p, flags);
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if (error) {
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@ -363,14 +325,76 @@ _isa_bus_dmamap_load(t, map, buf, buflen, p, flags)
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* Like _isa_bus_dmamap_load(), but for mbufs.
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*/
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int
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_isa_bus_dmamap_load_mbuf(t, map, m, flags)
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_isa_bus_dmamap_load_mbuf(t, map, m0, flags)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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struct mbuf *m;
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struct mbuf *m0;
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int flags;
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{
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struct bebox_isa_dma_cookie *cookie = map->_dm_cookie;
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int error;
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panic("_isa_bus_dmamap_load_mbuf: not implemented");
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/*
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* Make sure that on error condition we return "no valid mappings."
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*/
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map->dm_mapsize = 0;
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map->dm_nsegs = 0;
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#ifdef DIAGNOSTIC
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if ((m0->m_flags & M_PKTHDR) == 0)
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panic("_isa_bus_dmamap_load_mbuf: no packet header");
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#endif
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if (m0->m_pkthdr.len > map->_dm_size)
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return (EINVAL);
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/*
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* Try to load the map the normal way. If this errors out,
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* and we can bounce, we will.
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*/
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error = _bus_dmamap_load_mbuf(t, map, m0, flags);
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if (error == 0 ||
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(error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0))
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return (error);
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/*
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* First attempt failed; bounce it.
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*/
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STAT_INCR(isa_dma_stats_bounces);
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/*
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* Allocate bounce pages, if necessary.
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*/
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if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) {
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error = _isa_dma_alloc_bouncebuf(t, map, m0->m_pkthdr.len,
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flags);
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if (error)
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return (error);
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}
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/*
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* Cache a pointer to the caller's buffer and load the DMA map
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* with the bounce buffer.
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*/
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cookie->id_origbuf = m0;
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cookie->id_origbuflen = m0->m_pkthdr.len; /* not really used */
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cookie->id_buftype = ID_BUFTYPE_MBUF;
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error = _bus_dmamap_load(t, map, cookie->id_bouncebuf,
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m0->m_pkthdr.len, NULL, flags);
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if (error) {
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/*
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* Free the bounce pages, unless our resources
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* are reserved for our exclusive use.
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*/
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if ((map->_dm_flags & BUS_DMA_ALLOCNOW) == 0)
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_isa_dma_free_bouncebuf(t, map);
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return (error);
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}
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/* ...so _isa_bus_dmamap_sync() knows we're bouncing */
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cookie->id_flags |= ID_IS_BOUNCING;
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return (0);
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}
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/*
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@ -423,6 +447,7 @@ _isa_bus_dmamap_unload(t, map)
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_isa_dma_free_bouncebuf(t, map);
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cookie->id_flags &= ~ID_IS_BOUNCING;
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cookie->id_buftype = ID_BUFTYPE_INVALID;
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/*
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* Do the generic bits of the unload.
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@ -459,26 +484,30 @@ _isa_bus_dmamap_sync(t, map, offset, len, ops)
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}
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#endif
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/*
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* If we're not bouncing, just return; nothing to do.
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*/
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if ((cookie->id_flags & ID_IS_BOUNCING) == 0)
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return;
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switch (cookie->id_buftype) {
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case ID_BUFTYPE_LINEAR:
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/*
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* Nothing to do for pre-read.
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*/
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if (ops & BUS_DMASYNC_PREWRITE) {
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/*
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* If we're bouncing this transfer, copy the
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* caller's buffer to the bounce buffer.
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* Copy the caller's buffer to the bounce buffer.
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*/
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if (cookie->id_flags & ID_IS_BOUNCING)
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bcopy(cookie->id_origbuf + offset,
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cookie->id_bouncebuf + offset, len);
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}
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if (ops & BUS_DMASYNC_POSTREAD) {
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/*
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* If we're bouncing this transfer, copy the
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* bounce buffer to the caller's buffer.
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* Copy the bounce buffer to the caller's buffer.
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*/
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if (cookie->id_flags & ID_IS_BOUNCING)
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bcopy(cookie->id_bouncebuf + offset,
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cookie->id_origbuf + offset, len);
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}
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@ -486,11 +515,76 @@ _isa_bus_dmamap_sync(t, map, offset, len, ops)
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/*
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* Nothing to do for post-write.
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*/
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break;
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#if 0
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/* This is a noop anyhow, so why bother calling it? */
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_bus_dmamap_sync(t, map, offset, len, ops);
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#endif
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case ID_BUFTYPE_MBUF:
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{
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struct mbuf *m, *m0 = cookie->id_origbuf;
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bus_size_t minlen, moff;
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/*
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* Nothing to do for pre-read.
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*/
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if (ops & BUS_DMASYNC_PREWRITE) {
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/*
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* Copy the caller's buffer to the bounce buffer.
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*/
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m_copydata(m0, offset, len,
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cookie->id_bouncebuf + offset);
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}
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if (ops & BUS_DMASYNC_POSTREAD) {
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/*
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* Copy the bounce buffer to the caller's buffer.
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*/
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for (moff = offset, m = m0; m != NULL && len != 0;
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m = m->m_next) {
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/* Find the beginning mbuf. */
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if (moff >= m->m_len) {
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moff -= m->m_len;
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continue;
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}
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/*
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* Now at the first mbuf to sync; nail
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* each one until we have exhausted the
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* length.
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*/
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minlen = len < m->m_len - moff ?
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len : m->m_len - moff;
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bcopy(cookie->id_bouncebuf + offset,
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mtod(m, caddr_t) + moff, minlen);
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moff = 0;
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len -= minlen;
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offset += minlen;
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}
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}
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/*
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* Nothing to do for post-write.
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*/
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break;
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}
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case ID_BUFTYPE_UIO:
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panic("_isa_bus_dmamap_sync: ID_BUFTYPE_UIO");
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break;
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case ID_BUFTYPE_RAW:
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panic("_isa_bus_dmamap_sync: ID_BUFTYPE_RAW");
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break;
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case ID_BUFTYPE_INVALID:
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panic("_isa_bus_dmamap_sync: ID_BUFTYPE_INVALID");
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break;
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default:
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printf("unknown buffer type %d\n", cookie->id_buftype);
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panic("_isa_bus_dmamap_sync");
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}
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}
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/*
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