tc_dma_3000_500.c revision 1.7
1 /* $NetBSD: tc_dma_3000_500.c,v 1.7 1998/05/13 21:21:17 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 1.7 1998/05/13 21:21:17 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 0, /* _wsize */ 61 NULL, /* _next_window */ 62 NULL, /* _sgmap */ 63 NULL, /* _get_tag */ 64 tc_bus_dmamap_create_sgmap, 65 tc_bus_dmamap_destroy_sgmap, 66 tc_bus_dmamap_load_sgmap, 67 tc_bus_dmamap_load_mbuf_sgmap, 68 tc_bus_dmamap_load_uio_sgmap, 69 tc_bus_dmamap_load_raw_sgmap, 70 tc_bus_dmamap_unload_sgmap, 71 _bus_dmamap_sync, 72 _bus_dmamem_alloc, 73 _bus_dmamem_free, 74 _bus_dmamem_map, 75 _bus_dmamem_unmap, 76 _bus_dmamem_mmap, 77 }; 78 79 struct tc_dma_slot_info { 80 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ 81 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ 82 }; 83 struct tc_dma_slot_info *tc_dma_slot_info; 84 85 void 86 tc_dma_init_3000_500(nslots) 87 int nslots; 88 { 89 extern struct alpha_bus_dma_tag tc_dmat_direct; 90 size_t sisize; 91 int i; 92 93 /* Allocate per-slot DMA info. */ 94 sisize = nslots * sizeof(struct tc_dma_slot_info); 95 tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT); 96 if (tc_dma_slot_info == NULL) 97 panic("tc_dma_init: can't allocate per-slot DMA info"); 98 bzero(tc_dma_slot_info, sisize); 99 100 /* Default all slots to direct-mapped. */ 101 for (i = 0; i < nslots; i++) 102 bcopy(&tc_dmat_direct, &tc_dma_slot_info[i].tdsi_dmat, 103 sizeof(tc_dma_slot_info[i].tdsi_dmat)); 104 } 105 106 /* 107 * Return the DMA tag for the given slot. 108 */ 109 bus_dma_tag_t 110 tc_dma_get_tag_3000_500(slot) 111 int slot; 112 { 113 114 return (&tc_dma_slot_info[slot].tdsi_dmat); 115 } 116 117 /* 118 * Create a TurboChannel SGMAP-mapped DMA map. 119 */ 120 int 121 tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 122 flags, dmamp) 123 bus_dma_tag_t t; 124 bus_size_t size; 125 int nsegments; 126 bus_size_t maxsegsz; 127 bus_size_t boundary; 128 int flags; 129 bus_dmamap_t *dmamp; 130 { 131 struct tc_dma_slot_info *tdsi = t->_cookie; 132 bus_dmamap_t map; 133 int error; 134 135 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 136 boundary, flags, dmamp); 137 if (error) 138 return (error); 139 140 map = *dmamp; 141 142 if (flags & BUS_DMA_ALLOCNOW) { 143 error = alpha_sgmap_alloc(map, round_page(size), 144 &tdsi->tdsi_sgmap, flags); 145 if (error) 146 tc_bus_dmamap_destroy_sgmap(t, map); 147 } 148 149 return (error); 150 } 151 152 /* 153 * Destroy a TurboChannel SGMAP-mapped DMA map. 154 */ 155 void 156 tc_bus_dmamap_destroy_sgmap(t, map) 157 bus_dma_tag_t t; 158 bus_dmamap_t map; 159 { 160 struct tc_dma_slot_info *tdsi = t->_cookie; 161 162 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 163 alpha_sgmap_free(map, &tdsi->tdsi_sgmap); 164 165 _bus_dmamap_destroy(t, map); 166 } 167 168 /* 169 * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. 170 */ 171 int 172 tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 173 bus_dma_tag_t t; 174 bus_dmamap_t map; 175 void *buf; 176 bus_size_t buflen; 177 struct proc *p; 178 int flags; 179 { 180 struct tc_dma_slot_info *tdsi = t->_cookie; 181 182 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 183 &tdsi->tdsi_sgmap)); 184 } 185 186 /* 187 * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. 188 */ 189 int 190 tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 191 bus_dma_tag_t t; 192 bus_dmamap_t map; 193 struct mbuf *m; 194 int flags; 195 { 196 struct tc_dma_slot_info *tdsi = t->_cookie; 197 198 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 199 } 200 201 /* 202 * Load a TurboChannel SGMAP-mapped DMA map with a uio. 203 */ 204 int 205 tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 206 bus_dma_tag_t t; 207 bus_dmamap_t map; 208 struct uio *uio; 209 int flags; 210 { 211 struct tc_dma_slot_info *tdsi = t->_cookie; 212 213 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 214 } 215 216 /* 217 * Load a TurboChannel SGMAP-mapped DMA map with raw memory. 218 */ 219 int 220 tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 221 bus_dma_tag_t t; 222 bus_dmamap_t map; 223 bus_dma_segment_t *segs; 224 int nsegs; 225 bus_size_t size; 226 int flags; 227 { 228 struct tc_dma_slot_info *tdsi = t->_cookie; 229 230 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 231 &tdsi->tdsi_sgmap)); 232 } 233 234 /* 235 * Unload a TurboChannel SGMAP-mapped DMA map. 236 */ 237 void 238 tc_bus_dmamap_unload_sgmap(t, map) 239 bus_dma_tag_t t; 240 bus_dmamap_t map; 241 { 242 struct tc_dma_slot_info *tdsi = t->_cookie; 243 244 /* 245 * Invalidate any SGMAP page table entries used by this 246 * mapping. 247 */ 248 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 249 250 /* 251 * Do the generic bits of the unload. 252 */ 253 _bus_dmamap_unload(t, map); 254 } 255
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