9f011bca82
Use sx to allow M_WAITOK allocations (suggested by markj). admbugs: 782 Reviewed by: markj
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/*-
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* Copyright (c) 2015, 2019 Marcel Moolenaar
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* 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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*
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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 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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* $FreeBSD$
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*/
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#ifndef _DEV_PROTO_BUSDMA_H_
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#define _DEV_PROTO_BUSDMA_H_
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struct proto_md;
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struct proto_tag {
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LIST_ENTRY(proto_tag) tags;
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struct proto_tag *parent;
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LIST_ENTRY(proto_tag) peers;
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LIST_HEAD(,proto_tag) children;
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LIST_HEAD(,proto_md) mds;
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bus_addr_t align;
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bus_addr_t bndry;
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bus_addr_t maxaddr;
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bus_size_t maxsz;
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bus_size_t maxsegsz;
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u_int nsegs;
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u_int datarate;
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};
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struct proto_md {
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LIST_ENTRY(proto_md) mds;
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LIST_ENTRY(proto_md) peers;
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struct proto_tag *tag;
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void *virtaddr;
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vm_paddr_t physaddr;
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bus_dma_tag_t bd_tag;
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bus_dmamap_t bd_map;
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};
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struct proto_busdma {
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LIST_HEAD(,proto_tag) tags;
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LIST_HEAD(,proto_md) mds;
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bus_dma_tag_t bd_roottag;
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struct sx sxlck;
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};
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struct proto_busdma *proto_busdma_attach(struct proto_softc *);
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int proto_busdma_detach(struct proto_softc *, struct proto_busdma *);
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int proto_busdma_cleanup(struct proto_softc *, struct proto_busdma *);
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int proto_busdma_ioctl(struct proto_softc *, struct proto_busdma *,
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struct proto_ioc_busdma *, struct thread *);
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int proto_busdma_mmap_allowed(struct proto_busdma *, vm_paddr_t);
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#endif /* _DEV_PROTO_BUSDMA_H_ */
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