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 27 #ifndef _DEV_PROTO_BUSDMA_H_ 28 #define _DEV_PROTO_BUSDMA_H_ 29 30 struct proto_md; 31 32 struct proto_tag { 33 LIST_ENTRY(proto_tag) tags; 34 struct proto_tag *parent; 35 LIST_ENTRY(proto_tag) peers; 36 LIST_HEAD(,proto_tag) children; 37 LIST_HEAD(,proto_md) mds; 38 bus_addr_t align; 39 bus_addr_t bndry; 40 bus_addr_t maxaddr; 41 bus_size_t maxsz; 42 bus_size_t maxsegsz; 43 u_int nsegs; 44 u_int datarate; 45 }; 46 47 struct proto_md { 48 LIST_ENTRY(proto_md) mds; 49 LIST_ENTRY(proto_md) peers; 50 struct proto_tag *tag; 51 void *virtaddr; 52 vm_paddr_t physaddr; 53 bus_dma_tag_t bd_tag; 54 bus_dmamap_t bd_map; 55 }; 56 57 struct proto_busdma { 58 LIST_HEAD(,proto_tag) tags; 59 LIST_HEAD(,proto_md) mds; 60 bus_dma_tag_t bd_roottag; 61 struct sx sxlck; 62 }; 63 64 struct proto_busdma *proto_busdma_attach(struct proto_softc *); 65 int proto_busdma_detach(struct proto_softc *, struct proto_busdma *); 66 67 int proto_busdma_cleanup(struct proto_softc *, struct proto_busdma *); 68 69 int proto_busdma_ioctl(struct proto_softc *, struct proto_busdma *, 70 struct proto_ioc_busdma *, struct thread *); 71 72 int proto_busdma_mmap_allowed(struct proto_busdma *, vm_paddr_t); 73 74 #endif /* _DEV_PROTO_BUSDMA_H_ */ 75