tc_dma_3000_500.c revision 1.10
1 /* $NetBSD: tc_dma_3000_500.c,v 1.10 2000/06/29 09:02:58 mrg 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 1.10 2000/06/29 09:02:58 mrg 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 NULL, /* _get_tag */ 67 tc_bus_dmamap_create_sgmap, 68 tc_bus_dmamap_destroy_sgmap, 69 tc_bus_dmamap_load_sgmap, 70 tc_bus_dmamap_load_mbuf_sgmap, 71 tc_bus_dmamap_load_uio_sgmap, 72 tc_bus_dmamap_load_raw_sgmap, 73 tc_bus_dmamap_unload_sgmap, 74 _bus_dmamap_sync, 75 _bus_dmamem_alloc, 76 _bus_dmamem_free, 77 _bus_dmamem_map, 78 _bus_dmamem_unmap, 79 _bus_dmamem_mmap, 80 }; 81 82 struct tc_dma_slot_info { 83 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ 84 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ 85 }; 86 struct tc_dma_slot_info *tc_dma_slot_info; 87 88 void 89 tc_dma_init_3000_500(nslots) 90 int nslots; 91 { 92 extern struct alpha_bus_dma_tag tc_dmat_direct; 93 size_t sisize; 94 int i; 95 96 /* Allocate per-slot DMA info. */ 97 sisize = nslots * sizeof(struct tc_dma_slot_info); 98 tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT); 99 if (tc_dma_slot_info == NULL) 100 panic("tc_dma_init: can't allocate per-slot DMA info"); 101 bzero(tc_dma_slot_info, sisize); 102 103 /* Default all slots to direct-mapped. */ 104 for (i = 0; i < nslots; i++) 105 bcopy(&tc_dmat_direct, &tc_dma_slot_info[i].tdsi_dmat, 106 sizeof(tc_dma_slot_info[i].tdsi_dmat)); 107 } 108 109 /* 110 * Return the DMA tag for the given slot. 111 */ 112 bus_dma_tag_t 113 tc_dma_get_tag_3000_500(slot) 114 int slot; 115 { 116 117 return (&tc_dma_slot_info[slot].tdsi_dmat); 118 } 119 120 /* 121 * Create a TurboChannel SGMAP-mapped DMA map. 122 */ 123 int 124 tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 125 flags, dmamp) 126 bus_dma_tag_t t; 127 bus_size_t size; 128 int nsegments; 129 bus_size_t maxsegsz; 130 bus_size_t boundary; 131 int flags; 132 bus_dmamap_t *dmamp; 133 { 134 struct tc_dma_slot_info *tdsi = t->_cookie; 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 if (flags & BUS_DMA_ALLOCNOW) { 146 error = alpha_sgmap_alloc(map, round_page(size), 147 &tdsi->tdsi_sgmap, flags); 148 if (error) 149 tc_bus_dmamap_destroy_sgmap(t, map); 150 } 151 152 return (error); 153 } 154 155 /* 156 * Destroy a TurboChannel SGMAP-mapped DMA map. 157 */ 158 void 159 tc_bus_dmamap_destroy_sgmap(t, map) 160 bus_dma_tag_t t; 161 bus_dmamap_t map; 162 { 163 struct tc_dma_slot_info *tdsi = t->_cookie; 164 165 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 166 alpha_sgmap_free(map, &tdsi->tdsi_sgmap); 167 168 _bus_dmamap_destroy(t, map); 169 } 170 171 /* 172 * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. 173 */ 174 int 175 tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 176 bus_dma_tag_t t; 177 bus_dmamap_t map; 178 void *buf; 179 bus_size_t buflen; 180 struct proc *p; 181 int flags; 182 { 183 struct tc_dma_slot_info *tdsi = t->_cookie; 184 185 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 186 &tdsi->tdsi_sgmap)); 187 } 188 189 /* 190 * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. 191 */ 192 int 193 tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 194 bus_dma_tag_t t; 195 bus_dmamap_t map; 196 struct mbuf *m; 197 int flags; 198 { 199 struct tc_dma_slot_info *tdsi = t->_cookie; 200 201 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 202 } 203 204 /* 205 * Load a TurboChannel SGMAP-mapped DMA map with a uio. 206 */ 207 int 208 tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 209 bus_dma_tag_t t; 210 bus_dmamap_t map; 211 struct uio *uio; 212 int flags; 213 { 214 struct tc_dma_slot_info *tdsi = t->_cookie; 215 216 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 217 } 218 219 /* 220 * Load a TurboChannel SGMAP-mapped DMA map with raw memory. 221 */ 222 int 223 tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 224 bus_dma_tag_t t; 225 bus_dmamap_t map; 226 bus_dma_segment_t *segs; 227 int nsegs; 228 bus_size_t size; 229 int flags; 230 { 231 struct tc_dma_slot_info *tdsi = t->_cookie; 232 233 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 234 &tdsi->tdsi_sgmap)); 235 } 236 237 /* 238 * Unload a TurboChannel SGMAP-mapped DMA map. 239 */ 240 void 241 tc_bus_dmamap_unload_sgmap(t, map) 242 bus_dma_tag_t t; 243 bus_dmamap_t map; 244 { 245 struct tc_dma_slot_info *tdsi = t->_cookie; 246 247 /* 248 * Invalidate any SGMAP page table entries used by this 249 * mapping. 250 */ 251 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 252 253 /* 254 * Do the generic bits of the unload. 255 */ 256 _bus_dmamap_unload(t, map); 257 } 258
Indexes created Thu Oct 02 14:10:14 GMT 2025