proto_busdma.h

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    1 /*-
    2  * Copyright (c) 2015, 2019 Marcel Moolenaar
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  *
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 #ifndef _DEV_PROTO_BUSDMA_H_
   30 #define _DEV_PROTO_BUSDMA_H_
   31 
   32 struct proto_md;
   33 
   34 struct proto_tag {
   35         LIST_ENTRY(proto_tag)   tags;
   36         struct proto_tag        *parent;
   37         LIST_ENTRY(proto_tag)   peers;
   38         LIST_HEAD(,proto_tag)   children;
   39         LIST_HEAD(,proto_md)    mds;
   40         bus_addr_t              align;
   41         bus_addr_t              bndry;
   42         bus_addr_t              maxaddr;
   43         bus_size_t              maxsz;
   44         bus_size_t              maxsegsz;
   45         u_int                   nsegs;
   46         u_int                   datarate;
   47 };
   48 
   49 struct proto_md {
   50         LIST_ENTRY(proto_md)    mds;
   51         LIST_ENTRY(proto_md)    peers;
   52         struct proto_tag        *tag;
   53         void                    *virtaddr;
   54         vm_paddr_t              physaddr;
   55         bus_dma_tag_t           bd_tag;
   56         bus_dmamap_t            bd_map;
   57 };
   58 
   59 struct proto_busdma {
   60         LIST_HEAD(,proto_tag)   tags;
   61         LIST_HEAD(,proto_md)    mds;
   62         bus_dma_tag_t           bd_roottag;
   63         struct sx               sxlck;
   64 };
   65 
   66 struct proto_busdma *proto_busdma_attach(struct proto_softc *);
   67 int proto_busdma_detach(struct proto_softc *, struct proto_busdma *);
   68 
   69 int proto_busdma_cleanup(struct proto_softc *, struct proto_busdma *);
   70 
   71 int proto_busdma_ioctl(struct proto_softc *, struct proto_busdma *,
   72     struct proto_ioc_busdma *, struct thread *);
   73 
   74 int proto_busdma_mmap_allowed(struct proto_busdma *, vm_paddr_t);
   75 
   76 #endif /* _DEV_PROTO_BUSDMA_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/proto/proto_busdma.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/proto/proto_busdma.h