uba.c revision 1.78.4.1
1 /* $NetBSD: uba.c,v 1.78.4.1 2011/03/05 20:54:02 rmind 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 * 3. All advertising materials mentioning features or use of this software 48 * must display the following acknowledgement: 49 * This product includes software developed by the University of 50 * California, Berkeley and its contributors. 51 * 4. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)uba.c 7.10 (Berkeley) 12/16/90 68 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 69 */ 70 71 #include <sys/cdefs.h> 72 __KERNEL_RCSID(0, "$NetBSD: uba.c,v 1.78.4.1 2011/03/05 20:54:02 rmind Exp $"); 73 74 #include <sys/param.h> 75 #include <sys/time.h> 76 #include <sys/systm.h> 77 #include <sys/buf.h> 78 #include <sys/proc.h> 79 #include <sys/conf.h> 80 #include <sys/kernel.h> 81 #include <sys/malloc.h> 82 #include <sys/device.h> 83 84 #include <sys/bus.h> 85 #include <machine/scb.h> 86 #include <sys/cpu.h> 87 88 #include <dev/qbus/ubareg.h> 89 #include <dev/qbus/ubavar.h> 90 91 #include "ioconf.h" 92 #include "locators.h" 93 94 static int ubasearch (device_t, cfdata_t, 95 const int *, void *); 96 static int ubaprint (void *, const char *); 97 98 /* 99 * If we failed to allocate uba resources, put us on a queue to wait 100 * until there is available resources. Resources to compete about 101 * are map registers and BDPs. This is normally only a problem on 102 * Unibus systems, Qbus systems have more map registers than usable. 103 */ 104 void 105 uba_enqueue(struct uba_unit *uu) 106 { 107 struct uba_softc *uh; 108 int s; 109 110 uh = device_private(device_parent(uu->uu_dev)); 111 112 s = spluba(); 113 SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq); 114 splx(s); 115 } 116 117 /* 118 * When a routine that uses resources is finished, the next device 119 * in queue for map registers etc is called. If it succeeds to get 120 * resources, call next, and next, and next... 121 * This routine must be called at spluba. 122 */ 123 void 124 uba_done(struct uba_softc *uh) 125 { 126 struct uba_unit *uu; 127 128 while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) { 129 SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu_resq); 130 if ((*uu->uu_ready)(uu) == 0) { 131 SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq); 132 break; 133 } 134 } 135 } 136 137 /* 138 * Each device that needs some handling if an ubareset occurs must 139 * register for reset first through this routine. 140 */ 141 void 142 uba_reset_establish(void (*reset)(device_t), device_t dev) 143 { 144 struct uba_softc *uh = device_private(device_parent(dev)); 145 struct uba_reset *ur; 146 147 ur = malloc(sizeof(struct uba_reset), M_DEVBUF, M_NOWAIT|M_ZERO); 148 if (ur == NULL) 149 panic("uba_reset_establish"); 150 ur->ur_dev = dev; 151 ur->ur_reset = reset; 152 153 SIMPLEQ_INSERT_TAIL(&uh->uh_resetq, ur, ur_resetq); 154 } 155 156 /* 157 * Allocate a bunch of map registers and map them to the given address. 158 */ 159 int 160 uballoc(struct uba_softc *uh, struct ubinfo *ui, int flags) 161 { 162 int waitok = (flags & UBA_CANTWAIT) == 0; 163 int error; 164 165 if ((error = bus_dmamap_create(uh->uh_dmat, ui->ui_size, 1, 166 ui->ui_size, 0, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT), 167 &ui->ui_dmam))) 168 return error; 169 170 if ((error = bus_dmamap_load(uh->uh_dmat, ui->ui_dmam, ui->ui_vaddr, 171 ui->ui_size, NULL, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT)))) { 172 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam); 173 return error; 174 } 175 ui->ui_baddr = ui->ui_dmam->dm_segs[0].ds_addr; 176 return 0; 177 } 178 179 /* 180 * Allocate DMA-able memory and map it on the unibus. 181 */ 182 int 183 ubmemalloc(struct uba_softc *uh, struct ubinfo *ui, int flags) 184 { 185 int waitok = (flags & UBA_CANTWAIT ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK); 186 int error; 187 188 if ((error = bus_dmamem_alloc(uh->uh_dmat, ui->ui_size, PAGE_SIZE, 0, 189 &ui->ui_seg, 1, &ui->ui_rseg, waitok))) 190 return error; 191 if ((error = bus_dmamem_map(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg, 192 ui->ui_size, &ui->ui_vaddr, waitok|BUS_DMA_COHERENT))) { 193 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 194 return error; 195 } 196 if ((error = uballoc(uh, ui, flags))) { 197 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size); 198 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 199 } 200 return error; 201 } 202 203 void 204 ubfree(struct uba_softc *uh, struct ubinfo *ui) 205 { 206 bus_dmamap_unload(uh->uh_dmat, ui->ui_dmam); 207 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam); 208 } 209 210 void 211 ubmemfree(struct uba_softc *uh, struct ubinfo *ui) 212 { 213 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size); 214 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 215 ubfree(uh, ui); 216 } 217 218 /* 219 * Generate a reset on uba number uban. Then 220 * call each device that asked to be called during attach, 221 * giving it a chance to clean up so as to be able to continue. 222 */ 223 void 224 ubareset(struct uba_softc *uh) 225 { 226 struct uba_reset *ur; 227 int s; 228 229 s = spluba(); 230 SIMPLEQ_INIT(&uh->uh_resq); 231 printf("%s: reset", device_xname(uh->uh_dev)); 232 (*uh->uh_ubainit)(uh); 233 234 ur = SIMPLEQ_FIRST(&uh->uh_resetq); 235 if (ur) do { 236 printf(" %s", device_xname(ur->ur_dev)); 237 (*ur->ur_reset)(ur->ur_dev); 238 } while ((ur = SIMPLEQ_NEXT(ur, ur_resetq))); 239 240 printf("\n"); 241 splx(s); 242 } 243 244 /* 245 * The common attach routine: 246 * Calls the scan routine to search for uba devices. 247 */ 248 void 249 uba_attach(struct uba_softc *sc, paddr_t iopagephys) 250 { 251 252 /* 253 * Set last free interrupt vector for devices with 254 * programmable interrupt vectors. Use is to decrement 255 * this number and use result as interrupt vector. 256 */ 257 sc->uh_lastiv = 0x200; 258 SIMPLEQ_INIT(&sc->uh_resq); 259 SIMPLEQ_INIT(&sc->uh_resetq); 260 261 /* 262 * Allocate place for unibus I/O space in virtual space. 263 */ 264 if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh)) 265 return; 266 267 /* 268 * Keep track of which addressed devices are found. 269 */ 270 sc->uh_used = malloc(UBAIOSIZE, M_TEMP, M_WAITOK); 271 memset(sc->uh_used, 0, UBAIOSIZE); 272 273 if (sc->uh_beforescan) 274 (*sc->uh_beforescan)(sc); 275 /* 276 * Now start searching for devices. 277 */ 278 config_search_ia(ubasearch, sc->uh_dev, "uba", NULL); 279 280 if (sc->uh_afterscan) 281 (*sc->uh_afterscan)(sc); 282 283 free(sc->uh_used, M_TEMP); 284 } 285 286 int 287 ubasearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 288 { 289 struct uba_softc *sc = device_private(parent); 290 struct uba_attach_args ua; 291 int i, csr, vec, br; 292 293 csr = cf->cf_loc[UBACF_CSR]; 294 if (sc->uh_used[ubdevreg(csr)]) 295 return 0; /* something are already at this address */ 296 297 ua.ua_ioh = ubdevreg(csr) + sc->uh_ioh; 298 ua.ua_iot = sc->uh_iot; 299 ua.ua_dmat = sc->uh_dmat; 300 301 if (badaddr((void *)ua.ua_ioh, 2) || 302 (sc->uh_errchk ? (*sc->uh_errchk)(sc):0)) 303 goto forgetit; 304 305 scb_vecref(0, 0); /* Clear vector ref */ 306 i = config_match(parent, cf, &ua); 307 308 if (sc->uh_errchk) 309 if ((*sc->uh_errchk)(sc)) 310 goto forgetit; 311 if (i == 0) 312 goto forgetit; 313 314 i = scb_vecref(&vec, &br); 315 if (i == 0) 316 goto fail; 317 if (vec == 0) 318 goto fail; 319 320 ua.ua_br = br; 321 ua.ua_cvec = vec; 322 ua.ua_iaddr = csr; 323 ua.ua_evcnt = NULL; 324 325 sc->uh_used[ubdevreg(csr)] = 1; 326 327 config_attach(parent, cf, &ua, ubaprint); 328 return 0; 329 330 fail: 331 printf("%s%d at %s csr %o %s\n", 332 cf->cf_name, cf->cf_unit, device_xname(parent), 333 csr, (i ? "zero vector" : "didn't interrupt")); 334 335 forgetit: 336 return 0; 337 } 338 339 /* 340 * Print out some interesting info common to all unibus devices. 341 */ 342 int 343 ubaprint(void *aux, const char *uba) 344 { 345 struct uba_attach_args *ua = aux; 346 347 aprint_normal(" csr %o vec %o ipl %x", ua->ua_iaddr, 348 ua->ua_cvec & 511, ua->ua_br); 349 return UNCONF; 350 } 351 352 /* 353 * Move to machdep eventually 354 */ 355 void 356 uba_intr_establish(void *icookie, int vec, void (*ifunc)(void *iarg), 357 void *iarg, struct evcnt *ev) 358 { 359 scb_vecalloc(vec, ifunc, iarg, SCB_ISTACK, ev); 360 } 361
Indexes created Thu Oct 23 22:10:10 GMT 2025