tc_dma_3000_500.c revision 1.6
1 /* $NetBSD: tc_dma_3000_500.c,v 1.6 1998/05/07 20:09:38 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 1.6 1998/05/07 20:09:38 thorpej Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #include <vm/vm.h> 49 50 #define _ALPHA_BUS_DMA_PRIVATE 51 #include <machine/bus.h> 52 53 #include <dev/tc/tcvar.h> 54 #include <alpha/tc/tc_sgmap.h> 55 #include <alpha/tc/tc_dma_3000_500.h> 56 57 struct alpha_bus_dma_tag tc_dmat_sgmap = { 58 NULL, /* _cookie */ 59 0, /* _wbase */ 60 NULL, /* _get_tag */ 61 tc_bus_dmamap_create_sgmap, 62 tc_bus_dmamap_destroy_sgmap, 63 tc_bus_dmamap_load_sgmap, 64 tc_bus_dmamap_load_mbuf_sgmap, 65 tc_bus_dmamap_load_uio_sgmap, 66 tc_bus_dmamap_load_raw_sgmap, 67 tc_bus_dmamap_unload_sgmap, 68 _bus_dmamap_sync, 69 _bus_dmamem_alloc, 70 _bus_dmamem_free, 71 _bus_dmamem_map, 72 _bus_dmamem_unmap, 73 _bus_dmamem_mmap, 74 }; 75 76 struct tc_dma_slot_info { 77 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ 78 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ 79 }; 80 struct tc_dma_slot_info *tc_dma_slot_info; 81 82 void 83 tc_dma_init_3000_500(nslots) 84 int nslots; 85 { 86 extern struct alpha_bus_dma_tag tc_dmat_direct; 87 size_t sisize; 88 int i; 89 90 /* Allocate per-slot DMA info. */ 91 sisize = nslots * sizeof(struct tc_dma_slot_info); 92 tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT); 93 if (tc_dma_slot_info == NULL) 94 panic("tc_dma_init: can't allocate per-slot DMA info"); 95 bzero(tc_dma_slot_info, sisize); 96 97 /* Default all slots to direct-mapped. */ 98 for (i = 0; i < nslots; i++) 99 bcopy(&tc_dmat_direct, &tc_dma_slot_info[i].tdsi_dmat, 100 sizeof(tc_dma_slot_info[i].tdsi_dmat)); 101 } 102 103 /* 104 * Return the DMA tag for the given slot. 105 */ 106 bus_dma_tag_t 107 tc_dma_get_tag_3000_500(slot) 108 int slot; 109 { 110 111 return (&tc_dma_slot_info[slot].tdsi_dmat); 112 } 113 114 /* 115 * Create a TurboChannel SGMAP-mapped DMA map. 116 */ 117 int 118 tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 119 flags, dmamp) 120 bus_dma_tag_t t; 121 bus_size_t size; 122 int nsegments; 123 bus_size_t maxsegsz; 124 bus_size_t boundary; 125 int flags; 126 bus_dmamap_t *dmamp; 127 { 128 struct tc_dma_slot_info *tdsi = t->_cookie; 129 bus_dmamap_t map; 130 int error; 131 132 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 133 boundary, flags, dmamp); 134 if (error) 135 return (error); 136 137 map = *dmamp; 138 139 if (flags & BUS_DMA_ALLOCNOW) { 140 error = alpha_sgmap_alloc(map, round_page(size), 141 &tdsi->tdsi_sgmap, flags); 142 if (error) 143 tc_bus_dmamap_destroy_sgmap(t, map); 144 } 145 146 return (error); 147 } 148 149 /* 150 * Destroy a TurboChannel SGMAP-mapped DMA map. 151 */ 152 void 153 tc_bus_dmamap_destroy_sgmap(t, map) 154 bus_dma_tag_t t; 155 bus_dmamap_t map; 156 { 157 struct tc_dma_slot_info *tdsi = t->_cookie; 158 159 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 160 alpha_sgmap_free(map, &tdsi->tdsi_sgmap); 161 162 _bus_dmamap_destroy(t, map); 163 } 164 165 /* 166 * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. 167 */ 168 int 169 tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 170 bus_dma_tag_t t; 171 bus_dmamap_t map; 172 void *buf; 173 bus_size_t buflen; 174 struct proc *p; 175 int flags; 176 { 177 struct tc_dma_slot_info *tdsi = t->_cookie; 178 179 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 180 &tdsi->tdsi_sgmap)); 181 } 182 183 /* 184 * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. 185 */ 186 int 187 tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 188 bus_dma_tag_t t; 189 bus_dmamap_t map; 190 struct mbuf *m; 191 int flags; 192 { 193 struct tc_dma_slot_info *tdsi = t->_cookie; 194 195 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 196 } 197 198 /* 199 * Load a TurboChannel SGMAP-mapped DMA map with a uio. 200 */ 201 int 202 tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 203 bus_dma_tag_t t; 204 bus_dmamap_t map; 205 struct uio *uio; 206 int flags; 207 { 208 struct tc_dma_slot_info *tdsi = t->_cookie; 209 210 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 211 } 212 213 /* 214 * Load a TurboChannel SGMAP-mapped DMA map with raw memory. 215 */ 216 int 217 tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 218 bus_dma_tag_t t; 219 bus_dmamap_t map; 220 bus_dma_segment_t *segs; 221 int nsegs; 222 bus_size_t size; 223 int flags; 224 { 225 struct tc_dma_slot_info *tdsi = t->_cookie; 226 227 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 228 &tdsi->tdsi_sgmap)); 229 } 230 231 /* 232 * Unload a TurboChannel SGMAP-mapped DMA map. 233 */ 234 void 235 tc_bus_dmamap_unload_sgmap(t, map) 236 bus_dma_tag_t t; 237 bus_dmamap_t map; 238 { 239 struct tc_dma_slot_info *tdsi = t->_cookie; 240 241 /* 242 * Invalidate any SGMAP page table entries used by this 243 * mapping. 244 */ 245 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 246 247 /* 248 * Do the generic bits of the unload. 249 */ 250 _bus_dmamap_unload(t, map); 251 } 252
Indexes created Thu Oct 02 01:09:59 GMT 2025