1 /* $NetBSD: sgmap.h,v 1.5 2008/02/03 08:39:48 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #ifndef _VAX_SGMAP_H 41 #define _VAX_SGMAP_H 42 43 #include <sys/extent.h> 44 #include <machine/bus.h> 45 #include <machine/pte.h> 46 47 /* 48 * A VAX SGMAP's state information. Nothing in the sgmap requires 49 * locking[*], with the exception of the extent map. Locking of the 50 * extent map is handled within the extent manager itself. 51 * 52 * [*] While the page table is a `global' resource, access to it is 53 * controlled by the extent map; once a region has been allocated from 54 * the map, that region is effectively `locked'. 55 */ 56 struct vax_sgmap { 57 struct extent *aps_ex; /* extent map to manage sgva space */ 58 struct pte *aps_pt; /* page table */ 59 bus_addr_t aps_sgvabase; /* base of the sgva space */ 60 bus_size_t aps_sgvasize; /* size of the sgva space */ 61 bus_addr_t aps_pa; /* Address in region */ 62 unsigned int aps_flags; /* flags */ 63 }; 64 65 void vax_sgmap_dmatag_init(bus_dma_tag_t, void *, size_t); 66 67 void vax_sgmap_init(bus_dma_tag_t, struct vax_sgmap *, const char *, 68 bus_addr_t, bus_size_t, struct pte *, bus_size_t); 69 70 int vax_sgmap_alloc(bus_dmamap_t, bus_size_t, struct vax_sgmap *, int); 71 void vax_sgmap_free(bus_dmamap_t, struct vax_sgmap *); 72 73 int vax_sgmap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, 74 struct proc *, int, struct vax_sgmap *); 75 76 int vax_sgmap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int, 77 struct vax_sgmap *); 78 79 int vax_sgmap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *, int, 80 struct vax_sgmap *); 81 82 int vax_sgmap_load_raw(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 83 int, bus_size_t, int, struct vax_sgmap *); 84 85 void vax_sgmap_unload(bus_dma_tag_t, bus_dmamap_t, struct vax_sgmap *); 86 87 #endif /* _VAX_SGMAP_H */ 88