1 /* $NetBSD: vme.c,v 1.29 2021/08/07 16:19:17 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1999 5 * Matthias Drochner. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: vme.c,v 1.29 2021/08/07 16:19:17 thorpej Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/device.h> 37 #include <sys/malloc.h> 38 #include <sys/extent.h> 39 #include <sys/bus.h> 40 41 #include <dev/vme/vmereg.h> 42 #include <dev/vme/vmevar.h> 43 44 static void vme_extractlocators(int*, struct vme_attach_args *); 45 static int vmeprint(struct vme_attach_args *, char *); 46 static int vmesubmatch1(device_t, cfdata_t, const int *, void *); 47 static int vmesubmatch(device_t, cfdata_t, const int *, void *); 48 int vmematch(device_t, cfdata_t, void *); 49 void vmeattach(device_t, device_t, void *); 50 static struct extent *vme_select_map(struct vmebus_softc*, vme_am_t); 51 52 #define VME_SLAVE_DUMMYDRV "vme_slv" 53 54 #define VME_NUMCFRANGES 3 /* cf. "files.vme" */ 55 56 CFATTACH_DECL_NEW(vme, sizeof(struct vmebus_softc), 57 vmematch, vmeattach, NULL, NULL); 58 59 const struct cfattach vme_slv_ca = { 60 0 /* never used */ 61 }; 62 63 static void 64 vme_extractlocators(int *loc, struct vme_attach_args *aa) 65 { 66 int i = 0; 67 68 /* XXX can't use constants in locators.h this way */ 69 70 while (i < VME_NUMCFRANGES && i < VME_MAXCFRANGES && 71 loc[i] != -1) { 72 aa->r[i].offset = (vme_addr_t)loc[i]; 73 aa->r[i].size = (vme_size_t)loc[3 + i]; 74 aa->r[i].am = (vme_am_t)loc[6 + i]; 75 i++; 76 } 77 aa->numcfranges = i; 78 aa->ilevel = loc[9]; 79 aa->ivector = loc[10]; 80 } 81 82 static int 83 vmeprint(struct vme_attach_args *v, char *dummy) 84 { 85 int i; 86 87 for (i = 0; i < v->numcfranges; i++) { 88 aprint_normal(" addr %x", v->r[i].offset); 89 if (v->r[i].size != -1) 90 aprint_normal("-%x", v->r[i].offset + v->r[i].size - 1); 91 if (v->r[i].am != -1) 92 aprint_normal(" am %02x", v->r[i].am); 93 } 94 if (v->ilevel != -1) { 95 aprint_normal(" irq %d", v->ilevel); 96 if (v->ivector != -1) 97 aprint_normal(" vector %x", v->ivector); 98 } 99 return (UNCONF); 100 } 101 102 /* 103 * This looks for a (dummy) vme device "VME_SLAVE_DUMMYDRV". 104 * A callback provided by the bus's parent is called for every such 105 * entry in the config database. 106 * This is a special hack allowing to communicate the address settings 107 * of the VME master's slave side to its driver via the normal 108 * configuration mechanism. 109 * Needed in following cases: 110 * -DMA windows are hardware settable but not readable by software 111 * (driver gets offsets for DMA address calculations this way) 112 * -DMA windows are software settable, but not persistent 113 * (hardware is set up from config file entry) 114 * -other adapter VME slave ranges which should be kept track of 115 * for address space accounting 116 * In any case, the adapter driver must get the data before VME 117 * devices are attached. 118 */ 119 static int 120 vmesubmatch1(device_t bus, cfdata_t dev, const int *ldesc, void *aux) 121 { 122 struct vmebus_softc *sc = device_private(bus); 123 struct vme_attach_args v; 124 125 if (strcmp(dev->cf_name, VME_SLAVE_DUMMYDRV)) 126 return (0); 127 128 vme_extractlocators(dev->cf_loc, &v); 129 130 v.va_vct = sc->sc_vct; /* for space allocation */ 131 132 (*sc->slaveconfig)(device_parent(bus), &v); 133 return (0); 134 } 135 136 static int 137 vmesubmatch(device_t bus, cfdata_t dev, const int *ldesc, void *aux) 138 { 139 struct vmebus_softc *sc = device_private(bus); 140 struct vme_attach_args v; 141 142 if (!strcmp(dev->cf_name, VME_SLAVE_DUMMYDRV)) 143 return (0); 144 145 vme_extractlocators(dev->cf_loc, &v); 146 147 v.va_vct = sc->sc_vct; 148 v.va_bdt = sc->sc_bdt; 149 150 if (config_probe(bus, dev, &v)) { 151 config_attach(bus, dev, &v, (cfprint_t)vmeprint, CFARGS_NONE); 152 return (1); 153 } 154 return (0); 155 } 156 157 int 158 vmematch(device_t parent, cfdata_t match, void *aux) 159 { 160 return (1); 161 } 162 163 void 164 vmeattach(device_t parent, device_t self, void *aux) 165 { 166 struct vmebus_softc *sc = device_private(self); 167 168 struct vmebus_attach_args *aa = aux; 169 170 sc->sc_vct = aa->va_vct; 171 sc->sc_bdt = aa->va_bdt; 172 173 /* the "bus" are we ourselves */ 174 sc->sc_vct->bus = sc; 175 176 sc->slaveconfig = aa->va_slaveconfig; 177 178 printf("\n"); 179 180 /* 181 * set up address space accounting - assume incomplete decoding 182 */ 183 sc->vme32ext = extent_create("vme32", 0, 0xffffffff, 0, 0, 0); 184 if (!sc->vme32ext) { 185 printf("error creating A32 map\n"); 186 return; 187 } 188 189 sc->vme24ext = extent_create("vme24", 0, 0x00ffffff, 0, 0, 0); 190 if (!sc->vme24ext) { 191 printf("error creating A24 map\n"); 192 return; 193 } 194 195 sc->vme16ext = extent_create("vme16", 0, 0x0000ffff, 0, 0, 0); 196 if (!sc->vme16ext) { 197 printf("error creating A16 map\n"); 198 return; 199 } 200 201 if (sc->slaveconfig) { 202 /* first get info about the bus master's slave side, 203 if present */ 204 config_search(self, NULL, 205 CFARGS(.search = vmesubmatch1)); 206 } 207 config_search(self, NULL, 208 CFARGS(.search = vmesubmatch)); 209 210 #ifdef VMEDEBUG 211 if (sc->vme32ext) 212 extent_print(sc->vme32ext); 213 if (sc->vme24ext) 214 extent_print(sc->vme24ext); 215 if (sc->vme16ext) 216 extent_print(sc->vme16ext); 217 #endif 218 } 219 220 #ifdef notyet 221 int 222 vmedetach(device_t dev) 223 { 224 struct vmebus_softc *sc = device_private(dev); 225 226 if (sc->slaveconfig) { 227 /* allow bus master to free its bus resources */ 228 (*sc->slaveconfig)(device_parent(dev), 0); 229 } 230 231 /* extent maps should be empty now */ 232 233 if (sc->vme32ext) { 234 #ifdef VMEDEBUG 235 extent_print(sc->vme32ext); 236 #endif 237 extent_destroy(sc->vme32ext); 238 } 239 if (sc->vme24ext) { 240 #ifdef VMEDEBUG 241 extent_print(sc->vme24ext); 242 #endif 243 extent_destroy(sc->vme24ext); 244 } 245 if (sc->vme16ext) { 246 #ifdef VMEDEBUG 247 extent_print(sc->vme16ext); 248 #endif 249 extent_destroy(sc->vme16ext); 250 } 251 252 return (0); 253 } 254 #endif 255 256 static struct extent * 257 vme_select_map(struct vmebus_softc *sc, vme_am_t ams) 258 { 259 if ((ams & VME_AM_ADRSIZEMASK) == VME_AM_A32) 260 return (sc->vme32ext); 261 else if ((ams & VME_AM_ADRSIZEMASK) == VME_AM_A24) 262 return (sc->vme24ext); 263 else if ((ams & VME_AM_ADRSIZEMASK) == VME_AM_A16) 264 return (sc->vme16ext); 265 else 266 return (0); 267 } 268 269 int 270 _vme_space_alloc(struct vmebus_softc *sc, vme_addr_t addr, vme_size_t len, vme_am_t ams) 271 { 272 struct extent *ex; 273 274 ex = vme_select_map(sc, ams); 275 if (!ex) 276 return (EINVAL); 277 278 return (extent_alloc_region(ex, addr, len, EX_NOWAIT)); 279 } 280 281 void 282 _vme_space_free(struct vmebus_softc *sc, vme_addr_t addr, vme_size_t len, vme_am_t ams) 283 { 284 struct extent *ex; 285 286 ex = vme_select_map(sc, ams); 287 if (!ex) { 288 panic("vme_space_free: invalid am %x", ams); 289 return; 290 } 291 292 extent_free(ex, addr, len, EX_NOWAIT); 293 } 294 295 int 296 _vme_space_get(struct vmebus_softc *sc, vme_size_t len, vme_am_t ams, u_long align, vme_addr_t *addr) 297 { 298 struct extent *ex; 299 u_long help; 300 int res; 301 302 ex = vme_select_map(sc, ams); 303 if (!ex) 304 return (EINVAL); 305 306 res = extent_alloc(ex, len, align, EX_NOBOUNDARY, EX_NOWAIT, &help); 307 if (!res) 308 *addr = help; 309 return (res); 310 } 311