tc_dma_3000_500.c revision 1.13
1 /* $NetBSD: tc_dma_3000_500.c,v 1.13 2001/07/19 06:40:03 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 * 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 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 41 42 __KERNEL_RCSID(0, "$NetBSD: tc_dma_3000_500.c,v 1.13 2001/07/19 06:40:03 thorpej Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/device.h> 47 #include <sys/kernel.h> 48 #include <sys/malloc.h> 49 50 #include <uvm/uvm_extern.h> 51 52 #define _ALPHA_BUS_DMA_PRIVATE 53 #include <machine/bus.h> 54 55 #include <dev/tc/tcvar.h> 56 #include <alpha/tc/tc_sgmap.h> 57 #include <alpha/tc/tc_dma_3000_500.h> 58 59 struct alpha_bus_dma_tag tc_dmat_sgmap = { 60 NULL, /* _cookie */ 61 0, /* _wbase */ 62 0, /* _wsize */ 63 NULL, /* _next_window */ 64 0, /* _boundary */ 65 NULL, /* _sgmap */ 66 0, /* _pfthresh */ 67 NULL, /* _get_tag */ 68 tc_bus_dmamap_create_sgmap, 69 tc_bus_dmamap_destroy_sgmap, 70 tc_bus_dmamap_load_sgmap, 71 tc_bus_dmamap_load_mbuf_sgmap, 72 tc_bus_dmamap_load_uio_sgmap, 73 tc_bus_dmamap_load_raw_sgmap, 74 tc_bus_dmamap_unload_sgmap, 75 _bus_dmamap_sync, 76 _bus_dmamem_alloc, 77 _bus_dmamem_free, 78 _bus_dmamem_map, 79 _bus_dmamem_unmap, 80 _bus_dmamem_mmap, 81 }; 82 83 struct tc_dma_slot_info { 84 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ 85 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ 86 }; 87 struct tc_dma_slot_info *tc_dma_slot_info; 88 89 void 90 tc_dma_init_3000_500(nslots) 91 int nslots; 92 { 93 extern struct alpha_bus_dma_tag tc_dmat_direct; 94 size_t sisize; 95 int i; 96 97 /* Allocate per-slot DMA info. */ 98 sisize = nslots * sizeof(struct tc_dma_slot_info); 99 tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT); 100 if (tc_dma_slot_info == NULL) 101 panic("tc_dma_init: can't allocate per-slot DMA info"); 102 memset(tc_dma_slot_info, 0, sisize); 103 104 /* Default all slots to direct-mapped. */ 105 for (i = 0; i < nslots; i++) 106 memcpy(&tc_dma_slot_info[i].tdsi_dmat, &tc_dmat_direct, 107 sizeof(tc_dma_slot_info[i].tdsi_dmat)); 108 } 109 110 /* 111 * Return the DMA tag for the given slot. 112 */ 113 bus_dma_tag_t 114 tc_dma_get_tag_3000_500(slot) 115 int slot; 116 { 117 118 return (&tc_dma_slot_info[slot].tdsi_dmat); 119 } 120 121 /* 122 * Create a TurboChannel SGMAP-mapped DMA map. 123 */ 124 int 125 tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 126 flags, dmamp) 127 bus_dma_tag_t t; 128 bus_size_t size; 129 int nsegments; 130 bus_size_t maxsegsz; 131 bus_size_t boundary; 132 int flags; 133 bus_dmamap_t *dmamp; 134 { 135 bus_dmamap_t map; 136 int error; 137 138 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 139 boundary, flags, dmamp); 140 if (error) 141 return (error); 142 143 map = *dmamp; 144 145 /* XXX BUS_DMA_ALLOCNOW */ 146 147 return (error); 148 } 149 150 /* 151 * Destroy a TurboChannel SGMAP-mapped DMA map. 152 */ 153 void 154 tc_bus_dmamap_destroy_sgmap(t, map) 155 bus_dma_tag_t t; 156 bus_dmamap_t map; 157 { 158 159 KASSERT(map->dm_mapsize == 0); 160 161 _bus_dmamap_destroy(t, map); 162 } 163 164 /* 165 * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. 166 */ 167 int 168 tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 169 bus_dma_tag_t t; 170 bus_dmamap_t map; 171 void *buf; 172 bus_size_t buflen; 173 struct proc *p; 174 int flags; 175 { 176 struct tc_dma_slot_info *tdsi = t->_cookie; 177 178 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 179 &tdsi->tdsi_sgmap)); 180 } 181 182 /* 183 * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. 184 */ 185 int 186 tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 187 bus_dma_tag_t t; 188 bus_dmamap_t map; 189 struct mbuf *m; 190 int flags; 191 { 192 struct tc_dma_slot_info *tdsi = t->_cookie; 193 194 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 195 } 196 197 /* 198 * Load a TurboChannel SGMAP-mapped DMA map with a uio. 199 */ 200 int 201 tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 202 bus_dma_tag_t t; 203 bus_dmamap_t map; 204 struct uio *uio; 205 int flags; 206 { 207 struct tc_dma_slot_info *tdsi = t->_cookie; 208 209 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 210 } 211 212 /* 213 * Load a TurboChannel SGMAP-mapped DMA map with raw memory. 214 */ 215 int 216 tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 217 bus_dma_tag_t t; 218 bus_dmamap_t map; 219 bus_dma_segment_t *segs; 220 int nsegs; 221 bus_size_t size; 222 int flags; 223 { 224 struct tc_dma_slot_info *tdsi = t->_cookie; 225 226 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 227 &tdsi->tdsi_sgmap)); 228 } 229 230 /* 231 * Unload a TurboChannel SGMAP-mapped DMA map. 232 */ 233 void 234 tc_bus_dmamap_unload_sgmap(t, map) 235 bus_dma_tag_t t; 236 bus_dmamap_t map; 237 { 238 struct tc_dma_slot_info *tdsi = t->_cookie; 239 240 /* 241 * Invalidate any SGMAP page table entries used by this 242 * mapping. 243 */ 244 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 245 246 /* 247 * Do the generic bits of the unload. 248 */ 249 _bus_dmamap_unload(t, map); 250 } 251
Indexes created Thu Oct 02 01:09:59 GMT 2025