1 /* $NetBSD: sgmap.h,v 1.8 2023/12/03 00:49:46 thorpej 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _VAX_SGMAP_H 34 #define _VAX_SGMAP_H 35 36 #include <sys/vmem.h> 37 #include <machine/bus.h> 38 #include <machine/pte.h> 39 40 /* 41 * A VAX SGMAP's state information. Nothing in the sgmap requires 42 * locking[*], with the exception of the vmem arena, which takes care 43 * of it on its own. 44 * 45 * [*] While the page table is a `global' resource, access to it is 46 * controlled by the arena; once a region has been allocated from 47 * the arena, that region is effectively `locked'. 48 */ 49 struct vax_sgmap { 50 vmem_t *aps_arena; /* arena to manage sgva space */ 51 struct pte *aps_pt; /* page table */ 52 bus_addr_t aps_sgvabase; /* base of the sgva space */ 53 bus_size_t aps_sgvasize; /* size of the sgva space */ 54 bus_addr_t aps_pa; /* Address in region */ 55 unsigned int aps_flags; /* flags */ 56 }; 57 58 void vax_sgmap_dmatag_init(bus_dma_tag_t, void *, size_t); 59 60 void vax_sgmap_init(bus_dma_tag_t, struct vax_sgmap *, const char *, 61 bus_addr_t, bus_size_t, struct pte *, bus_size_t); 62 63 int vax_sgmap_alloc(bus_dmamap_t, bus_size_t, struct vax_sgmap *, int); 64 void vax_sgmap_free(bus_dmamap_t, struct vax_sgmap *); 65 66 int vax_sgmap_reserve(bus_addr_t, bus_size_t, struct vax_sgmap *); 67 68 int vax_sgmap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, 69 struct proc *, int, struct vax_sgmap *); 70 71 int vax_sgmap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int, 72 struct vax_sgmap *); 73 74 int vax_sgmap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *, int, 75 struct vax_sgmap *); 76 77 int vax_sgmap_load_raw(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 78 int, bus_size_t, int, struct vax_sgmap *); 79 80 void vax_sgmap_unload(bus_dma_tag_t, bus_dmamap_t, struct vax_sgmap *); 81 82 #endif /* _VAX_SGMAP_H */ 83