1 /* $NetBSD: uba.c,v 1.83 2021/08/07 16:19:15 thorpej Exp $ */ 2 /* 3 * Copyright (c) 1982, 1986 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)uba.c 7.10 (Berkeley) 12/16/90 31 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 32 */ 33 34 /* 35 * Copyright (c) 1996 Jonathan Stone. 36 * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden. 37 * All rights reserved. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)uba.c 7.10 (Berkeley) 12/16/90 61 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: uba.c,v 1.83 2021/08/07 16:19:15 thorpej Exp $"); 66 67 #include <sys/param.h> 68 #include <sys/time.h> 69 #include <sys/systm.h> 70 #include <sys/buf.h> 71 #include <sys/proc.h> 72 #include <sys/conf.h> 73 #include <sys/kernel.h> 74 #include <sys/malloc.h> 75 #include <sys/device.h> 76 77 #include <sys/bus.h> 78 #include <machine/scb.h> 79 #include <sys/cpu.h> 80 81 #include <dev/qbus/ubareg.h> 82 #include <dev/qbus/ubavar.h> 83 84 #include "ioconf.h" 85 #include "locators.h" 86 87 static int ubasearch (device_t, cfdata_t, 88 const int *, void *); 89 static int ubaprint (void *, const char *); 90 91 /* 92 * If we failed to allocate uba resources, put us on a queue to wait 93 * until there is available resources. Resources to compete about 94 * are map registers and BDPs. This is normally only a problem on 95 * Unibus systems, Qbus systems have more map registers than usable. 96 */ 97 void 98 uba_enqueue(struct uba_unit *uu) 99 { 100 struct uba_softc *uh; 101 int s; 102 103 uh = device_private(device_parent(uu->uu_dev)); 104 105 s = spluba(); 106 SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq); 107 splx(s); 108 } 109 110 /* 111 * When a routine that uses resources is finished, the next device 112 * in queue for map registers etc is called. If it succeeds to get 113 * resources, call next, and next, and next... 114 * This routine must be called at spluba. 115 */ 116 void 117 uba_done(struct uba_softc *uh) 118 { 119 struct uba_unit *uu; 120 121 while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) { 122 SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu_resq); 123 if ((*uu->uu_ready)(uu) == 0) { 124 SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq); 125 break; 126 } 127 } 128 } 129 130 /* 131 * Each device that needs some handling if an ubareset occurs must 132 * register for reset first through this routine. 133 */ 134 void 135 uba_reset_establish(void (*reset)(device_t), device_t dev) 136 { 137 struct uba_softc *uh = device_private(device_parent(dev)); 138 struct uba_reset *ur; 139 140 ur = malloc(sizeof(struct uba_reset), M_DEVBUF, M_WAITOK|M_ZERO); 141 ur->ur_dev = dev; 142 ur->ur_reset = reset; 143 144 SIMPLEQ_INSERT_TAIL(&uh->uh_resetq, ur, ur_resetq); 145 } 146 147 /* 148 * Allocate a bunch of map registers and map them to the given address. 149 */ 150 int 151 uballoc(struct uba_softc *uh, struct ubinfo *ui, int flags) 152 { 153 int waitok = (flags & UBA_CANTWAIT) == 0; 154 int error; 155 156 if ((error = bus_dmamap_create(uh->uh_dmat, ui->ui_size, 1, 157 ui->ui_size, 0, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT), 158 &ui->ui_dmam))) 159 return error; 160 161 if ((error = bus_dmamap_load(uh->uh_dmat, ui->ui_dmam, ui->ui_vaddr, 162 ui->ui_size, NULL, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT)))) { 163 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam); 164 return error; 165 } 166 ui->ui_baddr = ui->ui_dmam->dm_segs[0].ds_addr; 167 return 0; 168 } 169 170 /* 171 * Allocate DMA-able memory and map it on the unibus. 172 */ 173 int 174 ubmemalloc(struct uba_softc *uh, struct ubinfo *ui, int flags) 175 { 176 int waitok = (flags & UBA_CANTWAIT ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK); 177 int error; 178 179 if ((error = bus_dmamem_alloc(uh->uh_dmat, ui->ui_size, PAGE_SIZE, 0, 180 &ui->ui_seg, 1, &ui->ui_rseg, waitok))) 181 return error; 182 if ((error = bus_dmamem_map(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg, 183 ui->ui_size, &ui->ui_vaddr, waitok|BUS_DMA_COHERENT))) { 184 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 185 return error; 186 } 187 if ((error = uballoc(uh, ui, flags))) { 188 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size); 189 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 190 } 191 return error; 192 } 193 194 void 195 ubfree(struct uba_softc *uh, struct ubinfo *ui) 196 { 197 bus_dmamap_unload(uh->uh_dmat, ui->ui_dmam); 198 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam); 199 } 200 201 void 202 ubmemfree(struct uba_softc *uh, struct ubinfo *ui) 203 { 204 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size); 205 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 206 ubfree(uh, ui); 207 } 208 209 /* 210 * Generate a reset on uba number uban. Then 211 * call each device that asked to be called during attach, 212 * giving it a chance to clean up so as to be able to continue. 213 */ 214 void 215 ubareset(struct uba_softc *uh) 216 { 217 struct uba_reset *ur; 218 int s; 219 220 s = spluba(); 221 SIMPLEQ_INIT(&uh->uh_resq); 222 printf("%s: reset", device_xname(uh->uh_dev)); 223 (*uh->uh_ubainit)(uh); 224 225 ur = SIMPLEQ_FIRST(&uh->uh_resetq); 226 if (ur) do { 227 printf(" %s", device_xname(ur->ur_dev)); 228 (*ur->ur_reset)(ur->ur_dev); 229 } while ((ur = SIMPLEQ_NEXT(ur, ur_resetq))); 230 231 printf("\n"); 232 splx(s); 233 } 234 235 /* 236 * The common attach routine: 237 * Calls the scan routine to search for uba devices. 238 */ 239 void 240 uba_attach(struct uba_softc *sc, paddr_t iopagephys) 241 { 242 243 /* 244 * Set last free interrupt vector for devices with 245 * programmable interrupt vectors. Use is to decrement 246 * this number and use result as interrupt vector. 247 */ 248 sc->uh_lastiv = 0x200; 249 SIMPLEQ_INIT(&sc->uh_resq); 250 SIMPLEQ_INIT(&sc->uh_resetq); 251 252 /* 253 * Allocate place for unibus I/O space in virtual space. 254 */ 255 if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh)) 256 return; 257 258 /* 259 * Keep track of which addressed devices are found. 260 */ 261 sc->uh_used = malloc(UBAIOSIZE, M_TEMP, M_WAITOK); 262 memset(sc->uh_used, 0, UBAIOSIZE); 263 264 if (sc->uh_beforescan) 265 (*sc->uh_beforescan)(sc); 266 /* 267 * Now start searching for devices. 268 */ 269 config_search(sc->uh_dev, NULL, 270 CFARGS(.search = ubasearch)); 271 272 if (sc->uh_afterscan) 273 (*sc->uh_afterscan)(sc); 274 275 free(sc->uh_used, M_TEMP); 276 } 277 278 int 279 ubasearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 280 { 281 struct uba_softc *sc = device_private(parent); 282 struct uba_attach_args ua; 283 int i, csr, vec, br; 284 285 csr = cf->cf_loc[UBACF_CSR]; 286 if (sc->uh_used[ubdevreg(csr)]) 287 return 0; /* something are already at this address */ 288 289 ua.ua_ioh = ubdevreg(csr) + sc->uh_ioh; 290 ua.ua_iot = sc->uh_iot; 291 ua.ua_dmat = sc->uh_dmat; 292 293 if (badaddr((void *)ua.ua_ioh, 2) || 294 (sc->uh_errchk ? (*sc->uh_errchk)(sc):0)) 295 goto forgetit; 296 297 scb_vecref(0, 0); /* Clear vector ref */ 298 i = config_probe(parent, cf, &ua); 299 300 if (sc->uh_errchk) 301 if ((*sc->uh_errchk)(sc)) 302 goto forgetit; 303 if (i == 0) 304 goto forgetit; 305 306 i = scb_vecref(&vec, &br); 307 if (i == 0) 308 goto fail; 309 if (vec == 0) 310 goto fail; 311 312 ua.ua_br = br; 313 ua.ua_cvec = vec; 314 ua.ua_iaddr = csr; 315 ua.ua_evcnt = NULL; 316 317 sc->uh_used[ubdevreg(csr)] = 1; 318 319 config_attach(parent, cf, &ua, ubaprint, CFARGS_NONE); 320 return 0; 321 322 fail: 323 printf("%s%d at %s csr %o %s\n", 324 cf->cf_name, cf->cf_unit, device_xname(parent), 325 csr, (i ? "zero vector" : "didn't interrupt")); 326 327 forgetit: 328 return 0; 329 } 330 331 /* 332 * Print out some interesting info common to all unibus devices. 333 */ 334 int 335 ubaprint(void *aux, const char *uba) 336 { 337 struct uba_attach_args *ua = aux; 338 339 aprint_normal(" csr %o vec %o ipl %x", ua->ua_iaddr, 340 ua->ua_cvec & 511, ua->ua_br); 341 return UNCONF; 342 } 343 344 /* 345 * Move to machdep eventually 346 */ 347 void 348 uba_intr_establish(void *icookie, int vec, void (*ifunc)(void *iarg), 349 void *iarg, struct evcnt *ev) 350 { 351 scb_vecalloc(vec, ifunc, iarg, SCB_ISTACK, ev); 352 } 353
Indexes created Sat Sep 20 22:09:52 GMT 2025