1 /* $NetBSD: tc_dma_3000_500.c,v 1.24 2021/07/18 05:12:27 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 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 34 35 __KERNEL_RCSID(0, "$NetBSD: tc_dma_3000_500.c,v 1.24 2021/07/18 05:12:27 thorpej Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/kernel.h> 41 #include <sys/kmem.h> 42 43 #define _ALPHA_BUS_DMA_PRIVATE 44 #include <sys/bus.h> 45 46 #include <dev/tc/tcvar.h> 47 #include <alpha/tc/tc_sgmap.h> 48 #include <alpha/tc/tc_dma_3000_500.h> 49 50 struct alpha_bus_dma_tag tc_dmat_sgmap = { 51 NULL, /* _cookie */ 52 0, /* _wbase */ 53 0, /* _wsize */ 54 NULL, /* _next_window */ 55 0, /* _boundary */ 56 NULL, /* _sgmap */ 57 PAGE_SIZE, /* _sgmap_minalign */ 58 0, /* _pfthresh */ 59 NULL, /* _get_tag */ 60 tc_bus_dmamap_create_sgmap, 61 tc_bus_dmamap_destroy_sgmap, 62 tc_bus_dmamap_load_sgmap, 63 tc_bus_dmamap_load_mbuf_sgmap, 64 tc_bus_dmamap_load_uio_sgmap, 65 tc_bus_dmamap_load_raw_sgmap, 66 tc_bus_dmamap_unload_sgmap, 67 _bus_dmamap_sync, 68 _bus_dmamem_alloc, 69 _bus_dmamem_free, 70 _bus_dmamem_map, 71 _bus_dmamem_unmap, 72 _bus_dmamem_mmap, 73 }; 74 75 struct tc_dma_slot_info { 76 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ 77 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ 78 }; 79 struct tc_dma_slot_info *tc_dma_slot_info; 80 81 void 82 tc_dma_init_3000_500(int nslots) 83 { 84 extern struct alpha_bus_dma_tag tc_dmat_direct; 85 size_t sisize; 86 int i; 87 88 /* Allocate per-slot DMA info. */ 89 sisize = nslots * sizeof(struct tc_dma_slot_info); 90 tc_dma_slot_info = kmem_zalloc(sisize, KM_SLEEP); 91 92 /* Default all slots to direct-mapped. */ 93 for (i = 0; i < nslots; i++) 94 memcpy(&tc_dma_slot_info[i].tdsi_dmat, &tc_dmat_direct, 95 sizeof(tc_dma_slot_info[i].tdsi_dmat)); 96 } 97 98 /* 99 * Return the DMA tag for the given slot. 100 */ 101 bus_dma_tag_t 102 tc_dma_get_tag_3000_500(int slot) 103 { 104 105 return (&tc_dma_slot_info[slot].tdsi_dmat); 106 } 107 108 /* 109 * Create a TURBOchannel SGMAP-mapped DMA map. 110 */ 111 int 112 tc_bus_dmamap_create_sgmap( 113 bus_dma_tag_t t, 114 bus_size_t size, 115 int nsegments, 116 bus_size_t maxsegsz, 117 bus_size_t boundary, 118 int flags, 119 bus_dmamap_t *dmamp) 120 { 121 int error; 122 123 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 124 boundary, flags, dmamp); 125 if (error) 126 return (error); 127 128 (void)*dmamp; 129 130 /* XXX BUS_DMA_ALLOCNOW */ 131 132 return (error); 133 } 134 135 /* 136 * Destroy a TURBOchannel SGMAP-mapped DMA map. 137 */ 138 void 139 tc_bus_dmamap_destroy_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 140 { 141 142 KASSERT(map->dm_mapsize == 0); 143 144 _bus_dmamap_destroy(t, map); 145 } 146 147 /* 148 * Load a TURBOchannel SGMAP-mapped DMA map with a linear buffer. 149 */ 150 int 151 tc_bus_dmamap_load_sgmap(bus_dma_tag_t t, bus_dmamap_t map, void *buf, bus_size_t buflen, struct proc *p, int flags) 152 { 153 struct tc_dma_slot_info *tdsi = t->_cookie; 154 155 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 156 &tdsi->tdsi_sgmap)); 157 } 158 159 /* 160 * Load a TURBOchannel SGMAP-mapped DMA map with an mbuf chain. 161 */ 162 int 163 tc_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m, int flags) 164 { 165 struct tc_dma_slot_info *tdsi = t->_cookie; 166 167 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 168 } 169 170 /* 171 * Load a TURBOchannel SGMAP-mapped DMA map with a uio. 172 */ 173 int 174 tc_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio, int flags) 175 { 176 struct tc_dma_slot_info *tdsi = t->_cookie; 177 178 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 179 } 180 181 /* 182 * Load a TURBOchannel SGMAP-mapped DMA map with raw memory. 183 */ 184 int 185 tc_bus_dmamap_load_raw_sgmap(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags) 186 { 187 struct tc_dma_slot_info *tdsi = t->_cookie; 188 189 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 190 &tdsi->tdsi_sgmap)); 191 } 192 193 /* 194 * Unload a TURBOchannel SGMAP-mapped DMA map. 195 */ 196 void 197 tc_bus_dmamap_unload_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 198 { 199 struct tc_dma_slot_info *tdsi = t->_cookie; 200 201 /* 202 * Invalidate any SGMAP page table entries used by this 203 * mapping. 204 */ 205 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 206 207 /* 208 * Do the generic bits of the unload. 209 */ 210 _bus_dmamap_unload_common(t, map); 211 } 212
Indexes created Tue Sep 30 11:09:46 GMT 2025