eb36b1d0bc
--Remove special-case handling of sparc64 bus_dmamap* functions. Replace with a more generic mechanism that allows MD busdma implementations to generate inline mapping functions by defining WANT_INLINE_DMAMAP in <machine/bus_dma.h>. This is currently useful for sparc64, x86, and arm64, which all implement non-load dmamap operations as simple wrappers around map objects which may be bus- or device-specific. --Remove NULL-checked bus_dmamap macros. Implement the equivalent NULL checks in the inlined x86 implementation. For non-x86 platforms, these checks are a minor pessimization as those platforms do not currently allow NULL maps. NULL maps were originally allowed on arm64, which appears to have been the motivation behind adding arm[64]-specific barriers to bus_dma.h, but that support was removed in r299463. --Simplify the internal interface used by the bus_dmamap_load* variants and move it to bus_dma_internal.h --Fix some drivers that directly include sys/bus_dma.h despite the recommendations of bus_dma(9) Reviewed by: kib (previous revision), marius Differential Revision: https://reviews.freebsd.org/D10729
220 lines
7.4 KiB
C
220 lines
7.4 KiB
C
/*-
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* Copyright (c) 1996, 1997, 1998, 2001 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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*
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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) 1997-1999 Eduardo E. Horvath. All rights reserved.
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* Copyright (c) 1996 Charles M. Hannum. All rights reserved.
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* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
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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 Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: NetBSD: bus.h,v 1.58 2008/04/28 20:23:36 martin Exp
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* and
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* from: FreeBSD: src/sys/alpha/include/bus.h,v 1.9 2001/01/09
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*
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* $FreeBSD$
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*/
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#ifndef _SPARC64_BUS_DMA_H
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#define _SPARC64_BUS_DMA_H
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#define WANT_INLINE_DMAMAP
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#include <sys/bus_dma.h>
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/* DMA support */
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/*
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* Method table for a bus_dma_tag.
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*/
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struct bus_dma_methods {
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int (*dm_dmamap_create)(bus_dma_tag_t, int, bus_dmamap_t *);
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int (*dm_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t);
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int (*dm_dmamap_load_phys)(bus_dma_tag_t dmat, bus_dmamap_t map,
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vm_paddr_t buf, bus_size_t buflen, int flags,
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bus_dma_segment_t *segs, int *segp);
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int (*dm_dmamap_load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map,
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void *buf, bus_size_t buflen, struct pmap *pmap, int flags,
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bus_dma_segment_t *segs, int *segp);
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void (*dm_dmamap_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map,
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struct memdesc *mem, bus_dmamap_callback_t *callback,
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void *callback_arg);
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bus_dma_segment_t *(*dm_dmamap_complete)(bus_dma_tag_t dmat,
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bus_dmamap_t map, bus_dma_segment_t *segs, int nsegs, int error);
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void (*dm_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t);
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void (*dm_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t,
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bus_dmasync_op_t);
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int (*dm_dmamem_alloc)(bus_dma_tag_t, void **, int, bus_dmamap_t *);
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void (*dm_dmamem_free)(bus_dma_tag_t, void *, bus_dmamap_t);
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};
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/*
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* bus_dma_tag_t
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*
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* A machine-dependent opaque type describing the implementation of
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* DMA for a given bus.
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*/
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struct bus_dma_tag {
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void *dt_cookie; /* cookie used in the guts */
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bus_dma_tag_t dt_parent;
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bus_size_t dt_alignment;
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bus_addr_t dt_boundary;
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bus_addr_t dt_lowaddr;
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bus_addr_t dt_highaddr;
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bus_dma_filter_t *dt_filter;
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void *dt_filterarg;
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bus_size_t dt_maxsize;
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int dt_nsegments;
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bus_size_t dt_maxsegsz;
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int dt_flags;
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int dt_ref_count;
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int dt_map_count;
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bus_dma_lock_t *dt_lockfunc;
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void * *dt_lockfuncarg;
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bus_dma_segment_t *dt_segments;
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struct bus_dma_methods *dt_mt;
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};
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static inline int
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bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
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{
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return (dmat->dt_mt->dm_dmamap_create(dmat, flags, mapp));
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}
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static inline int
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bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map)
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{
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return (dmat->dt_mt->dm_dmamap_destroy(dmat, map));
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}
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static inline void
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bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
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{
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dmat->dt_mt->dm_dmamap_sync(dmat, map, op);
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}
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static inline void
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bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
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{
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dmat->dt_mt->dm_dmamap_unload(dmat, map);
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}
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static inline int
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bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags, bus_dmamap_t *mapp)
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{
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return (dmat->dt_mt->dm_dmamem_alloc(dmat, vaddr, flags, mapp));
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}
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static inline void
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bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map)
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{
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dmat->dt_mt->dm_dmamem_free(dmat, vaddr, map);
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}
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static inline bus_dma_segment_t*
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_bus_dmamap_complete(bus_dma_tag_t dmat, bus_dmamap_t map,
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bus_dma_segment_t *segs, int nsegs, int error)
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{
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return (dmat->dt_mt->dm_dmamap_complete(dmat, map, segs,
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nsegs, error));
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}
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static inline int
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_bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map,
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void *buf, bus_size_t buflen, struct pmap *pmap,
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int flags, bus_dma_segment_t *segs, int *segp)
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{
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return (dmat->dt_mt->dm_dmamap_load_buffer(dmat, map, buf, buflen,
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pmap, flags, segs, segp));
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}
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static inline int
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_bus_dmamap_load_ma(bus_dma_tag_t dmat, bus_dmamap_t map,
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struct vm_page **ma, bus_size_t tlen, int ma_offs,
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int flags, bus_dma_segment_t *segs, int *segp)
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{
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return (bus_dmamap_load_ma_triv(dmat, map, ma, tlen, ma_offs, flags,
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segs, segp));
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}
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static inline int
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_bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map,
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vm_paddr_t paddr, bus_size_t buflen,
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int flags, bus_dma_segment_t *segs, int *segp)
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{
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return (dmat->dt_mt->dm_dmamap_load_phys(dmat, map, paddr, buflen,
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flags, segs, segp));
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}
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static inline void
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_bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map,
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struct memdesc *mem, bus_dmamap_callback_t *callback,
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void *callback_arg)
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{
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return (dmat->dt_mt->dm_dmamap_waitok(dmat, map, mem, callback,
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callback_arg));
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}
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#endif /* !_SPARC64_BUS_DMA_H_ */
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