1 /* $NetBSD: uda.c,v 1.38 2000/06/10 19:44:55 ragge Exp $ */ 2 /* 3 * Copyright (c) 1996 Ludd, University of Lule}, Sweden. 4 * Copyright (c) 1988 Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Chris Torek. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)uda.c 7.32 (Berkeley) 2/13/91 39 */ 40 41 /* 42 * UDA50 disk device driver 43 */ 44 45 #include <sys/param.h> 46 #include <sys/kernel.h> 47 #include <sys/systm.h> 48 #include <sys/device.h> 49 #include <sys/buf.h> 50 #include <sys/malloc.h> 51 52 #include <machine/bus.h> 53 #include <machine/sid.h> 54 55 #include <dev/qbus/ubavar.h> 56 57 #include <dev/mscp/mscp.h> 58 #include <dev/mscp/mscpreg.h> 59 #include <dev/mscp/mscpvar.h> 60 61 #include "ioconf.h" 62 63 /* 64 * Software status, per controller. 65 */ 66 struct uda_softc { 67 struct device sc_dev; /* Autoconfig info */ 68 struct evcnt sc_intrcnt; /* Interrupt counting */ 69 struct uba_unit sc_unit; /* Struct common for UBA to communicate */ 70 struct buf_queue sc_bufq; /* bufs awaiting for resources */ 71 struct mscp_pack *sc_uuda; /* Unibus address of uda struct */ 72 struct mscp_pack sc_uda; /* Struct for uda communication */ 73 bus_dma_tag_t sc_dmat; 74 bus_space_tag_t sc_iot; 75 bus_space_handle_t sc_iph; 76 bus_space_handle_t sc_sah; 77 bus_dmamap_t sc_cmap;/* Control structures */ 78 struct mscp *sc_mscp; /* Keep pointer to active mscp */ 79 struct mscp_softc *sc_softc; /* MSCP info (per mscpvar.h) */ 80 int sc_wticks; /* watchdog timer ticks */ 81 int sc_inq; 82 }; 83 84 static int udamatch __P((struct device *, struct cfdata *, void *)); 85 static void udaattach __P((struct device *, struct device *, void *)); 86 static void udareset(struct device *); 87 static void udaintr __P((void *)); 88 int udaready __P((struct uba_unit *)); 89 void udactlrdone __P((struct device *)); 90 int udaprint __P((void *, const char *)); 91 void udasaerror __P((struct device *, int)); 92 void udago __P((struct device *, struct mscp_xi *)); 93 94 struct cfattach mtc_ca = { 95 sizeof(struct uda_softc), udamatch, udaattach 96 }; 97 98 struct cfattach uda_ca = { 99 sizeof(struct uda_softc), udamatch, udaattach 100 }; 101 102 /* 103 * More driver definitions, for generic MSCP code. 104 */ 105 struct mscp_ctlr uda_mscp_ctlr = { 106 udactlrdone, 107 udago, 108 udasaerror, 109 }; 110 111 /* 112 * Miscellaneous private variables. 113 */ 114 static int ivec_no; 115 116 int 117 udaprint(aux, name) 118 void *aux; 119 const char *name; 120 { 121 if (name) 122 printf("%s: mscpbus", name); 123 return UNCONF; 124 } 125 126 /* 127 * Poke at a supposed UDA50 to see if it is there. 128 */ 129 int 130 udamatch(parent, cf, aux) 131 struct device *parent; 132 struct cfdata *cf; 133 void *aux; 134 { 135 struct uba_attach_args *ua = aux; 136 struct mscp_softc mi; /* Nice hack */ 137 struct uba_softc *ubasc; 138 int tries; 139 140 /* Get an interrupt vector. */ 141 ubasc = (void *)parent; 142 ivec_no = ubasc->uh_lastiv - 4; 143 144 mi.mi_iot = ua->ua_iot; 145 mi.mi_iph = ua->ua_ioh; 146 mi.mi_sah = ua->ua_ioh + 2; 147 mi.mi_swh = ua->ua_ioh + 2; 148 149 /* 150 * Initialise the controller (partially). The UDA50 programmer's 151 * manual states that if initialisation fails, it should be retried 152 * at least once, but after a second failure the port should be 153 * considered `down'; it also mentions that the controller should 154 * initialise within ten seconds. Or so I hear; I have not seen 155 * this manual myself. 156 */ 157 tries = 0; 158 again: 159 160 bus_space_write_2(mi.mi_iot, mi.mi_iph, 0, 0); /* Start init */ 161 if (mscp_waitstep(&mi, MP_STEP1, MP_STEP1) == 0) 162 return 0; /* Nothing here... */ 163 164 bus_space_write_2(mi.mi_iot, mi.mi_sah, 0, 165 MP_ERR | (NCMDL2 << 11) | (NRSPL2 << 8) | MP_IE | (ivec_no >> 2)); 166 167 if (mscp_waitstep(&mi, MP_STEP2, MP_STEP2) == 0) { 168 printf("udaprobe: init step2 no change. sa=%x\n", 169 bus_space_read_2(mi.mi_iot, mi.mi_sah, 0)); 170 goto bad; 171 } 172 173 /* should have interrupted by now */ 174 return 1; 175 bad: 176 if (++tries < 2) 177 goto again; 178 return 0; 179 } 180 181 void 182 udaattach(parent, self, aux) 183 struct device *parent, *self; 184 void *aux; 185 { 186 struct uda_softc *sc = (void *)self; 187 struct uba_attach_args *ua = aux; 188 struct uba_softc *uh = (void *)parent; 189 struct mscp_attach_args ma; 190 int ctlr, error, rseg; 191 bus_dma_segment_t seg; 192 193 printf("\n"); 194 195 uh->uh_lastiv -= 4; /* remove dynamic interrupt vector */ 196 197 uba_intr_establish(ua->ua_icookie, ua->ua_cvec, 198 udaintr, sc, &sc->sc_intrcnt); 199 uba_reset_establish(udareset, &sc->sc_dev); 200 evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 201 sc->sc_dev.dv_xname, "intr"); 202 203 sc->sc_iot = ua->ua_iot; 204 sc->sc_iph = ua->ua_ioh; 205 sc->sc_sah = ua->ua_ioh + 2; 206 sc->sc_dmat = ua->ua_dmat; 207 ctlr = sc->sc_dev.dv_unit; 208 BUFQ_INIT(&sc->sc_bufq); 209 210 /* 211 * Fill in the uba_unit struct, so we can communicate with the uba. 212 */ 213 sc->sc_unit.uu_softc = sc; /* Backpointer to softc */ 214 sc->sc_unit.uu_ready = udaready;/* go routine called from adapter */ 215 sc->sc_unit.uu_keepbdp = vax_cputype == VAX_750 ? 1 : 0; 216 217 /* 218 * Map the communication area and command and 219 * response packets into Unibus space. 220 */ 221 if ((error = bus_dmamem_alloc(sc->sc_dmat, sizeof(struct mscp_pack), 222 NBPG, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 223 printf("Alloc ctrl area %d\n", error); 224 return; 225 } 226 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 227 sizeof(struct mscp_pack), (caddr_t *) &sc->sc_uda, 228 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 229 printf("Map ctrl area %d\n", error); 230 err: bus_dmamem_free(sc->sc_dmat, &seg, rseg); 231 return; 232 } 233 if ((error = bus_dmamap_create(sc->sc_dmat, sizeof(struct mscp_pack), 234 1, sizeof(struct mscp_pack), 0, BUS_DMA_NOWAIT, &sc->sc_cmap))) { 235 printf("Create DMA map %d\n", error); 236 err2: bus_dmamem_unmap(sc->sc_dmat, (caddr_t)&sc->sc_uda, 237 sizeof(struct mscp_pack)); 238 goto err; 239 } 240 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cmap, 241 &sc->sc_uda, sizeof(struct mscp_pack), 0, BUS_DMA_NOWAIT))) { 242 printf("Load ctrl map %d\n", error); 243 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cmap); 244 goto err2; 245 } 246 247 bzero(&sc->sc_uda, sizeof (struct mscp_pack)); 248 249 /* 250 * The only thing that differ UDA's and Tape ctlr's is 251 * their vcid. Beacuse there are no way to determine which 252 * ctlr type it is, we check what is generated and later 253 * set the correct vcid. 254 */ 255 ma.ma_type = (strcmp(self->dv_cfdata->cf_driver->cd_name, "mtc") ? 256 MSCPBUS_DISK : MSCPBUS_TAPE); 257 258 ma.ma_mc = &uda_mscp_ctlr; 259 ma.ma_type |= MSCPBUS_UDA; 260 ma.ma_uda = &sc->sc_uda; 261 ma.ma_softc = &sc->sc_softc; 262 ma.ma_iot = sc->sc_iot; 263 ma.ma_iph = sc->sc_iph; 264 ma.ma_sah = sc->sc_sah; 265 ma.ma_swh = sc->sc_sah; 266 ma.ma_dmat = sc->sc_dmat; 267 ma.ma_dmam = sc->sc_cmap; 268 ma.ma_ivec = ivec_no; 269 ma.ma_ctlrnr = (ua->ua_iaddr == 0172150 ? 0 : 1); /* XXX */ 270 ma.ma_adapnr = uh->uh_nr; 271 config_found(&sc->sc_dev, &ma, udaprint); 272 } 273 274 /* 275 * Start a transfer if there are free resources available, otherwise 276 * let it go in udaready, forget it for now. 277 * Called from mscp routines. 278 */ 279 void 280 udago(usc, mxi) 281 struct device *usc; 282 struct mscp_xi *mxi; 283 { 284 struct uda_softc *sc = (void *)usc; 285 struct uba_unit *uu; 286 struct buf *bp = mxi->mxi_bp; 287 int err; 288 289 /* 290 * If we already have transfers queued, don't try to load 291 * the map again. 292 */ 293 if (sc->sc_inq == 0) { 294 err = bus_dmamap_load(sc->sc_dmat, mxi->mxi_dmam, 295 bp->b_data, 296 bp->b_bcount, bp->b_proc, BUS_DMA_NOWAIT); 297 if (err == 0) { 298 mscp_dgo(sc->sc_softc, mxi); 299 return; 300 } 301 } 302 uu = malloc(sizeof(struct uba_unit), M_DEVBUF, M_NOWAIT); 303 if (uu == 0) 304 panic("udago: no mem"); 305 uu->uu_ready = udaready; 306 uu->uu_softc = sc; 307 uu->uu_ref = mxi; 308 uba_enqueue(uu); 309 sc->sc_inq++; 310 } 311 312 /* 313 * Called if we have been blocked for resources, and resources 314 * have been freed again. Return 1 if we could start all 315 * transfers again, 0 if we still are waiting. 316 * Called from uba resource free routines. 317 */ 318 int 319 udaready(uu) 320 struct uba_unit *uu; 321 { 322 struct uda_softc *sc = uu->uu_softc; 323 struct mscp_xi *mxi = uu->uu_ref; 324 struct buf *bp = mxi->mxi_bp; 325 int err; 326 327 err = bus_dmamap_load(sc->sc_dmat, mxi->mxi_dmam, bp->b_data, 328 bp->b_bcount, bp->b_proc, BUS_DMA_NOWAIT); 329 if (err) 330 return 0; 331 mscp_dgo(sc->sc_softc, mxi); 332 sc->sc_inq--; 333 free(uu, M_DEVBUF); 334 return 1; 335 } 336 337 static struct saerr { 338 int code; /* error code (including UDA_ERR) */ 339 char *desc; /* what it means: Efoo => foo error */ 340 } saerr[] = { 341 { 0100001, "Eunibus packet read" }, 342 { 0100002, "Eunibus packet write" }, 343 { 0100003, "EUDA ROM and RAM parity" }, 344 { 0100004, "EUDA RAM parity" }, 345 { 0100005, "EUDA ROM parity" }, 346 { 0100006, "Eunibus ring read" }, 347 { 0100007, "Eunibus ring write" }, 348 { 0100010, " unibus interrupt master failure" }, 349 { 0100011, "Ehost access timeout" }, 350 { 0100012, " host exceeded command limit" }, 351 { 0100013, " unibus bus master failure" }, 352 { 0100014, " DM XFC fatal error" }, 353 { 0100015, " hardware timeout of instruction loop" }, 354 { 0100016, " invalid virtual circuit id" }, 355 { 0100017, "Eunibus interrupt write" }, 356 { 0104000, "Efatal sequence" }, 357 { 0104040, " D proc ALU" }, 358 { 0104041, "ED proc control ROM parity" }, 359 { 0105102, "ED proc w/no BD#2 or RAM parity" }, 360 { 0105105, "ED proc RAM buffer" }, 361 { 0105152, "ED proc SDI" }, 362 { 0105153, "ED proc write mode wrap serdes" }, 363 { 0105154, "ED proc read mode serdes, RSGEN & ECC" }, 364 { 0106040, "EU proc ALU" }, 365 { 0106041, "EU proc control reg" }, 366 { 0106042, " U proc DFAIL/cntl ROM parity/BD #1 test CNT" }, 367 { 0106047, " U proc const PROM err w/D proc running SDI test" }, 368 { 0106055, " unexpected trap" }, 369 { 0106071, "EU proc const PROM" }, 370 { 0106072, "EU proc control ROM parity" }, 371 { 0106200, "Estep 1 data" }, 372 { 0107103, "EU proc RAM parity" }, 373 { 0107107, "EU proc RAM buffer" }, 374 { 0107115, " test count wrong (BD 12)" }, 375 { 0112300, "Estep 2" }, 376 { 0122240, "ENPR" }, 377 { 0122300, "Estep 3" }, 378 { 0142300, "Estep 4" }, 379 { 0, " unknown error code" } 380 }; 381 382 /* 383 * If the error bit was set in the controller status register, gripe, 384 * then (optionally) reset the controller and requeue pending transfers. 385 */ 386 void 387 udasaerror(usc, doreset) 388 struct device *usc; 389 int doreset; 390 { 391 struct uda_softc *sc = (void *)usc; 392 int code = bus_space_read_2(sc->sc_iot, sc->sc_sah, 0); 393 struct saerr *e; 394 395 if ((code & MP_ERR) == 0) 396 return; 397 for (e = saerr; e->code; e++) 398 if (e->code == code) 399 break; 400 printf("%s: controller error, sa=0%o (%s%s)\n", 401 sc->sc_dev.dv_xname, code, e->desc + 1, 402 *e->desc == 'E' ? " error" : ""); 403 #if 0 /* XXX we just avoid panic when autoconfig non-existent KFQSA devices */ 404 if (doreset) { 405 mscp_requeue(sc->sc_softc); 406 /* (void) udainit(sc); XXX */ 407 } 408 #endif 409 } 410 411 /* 412 * Interrupt routine. Depending on the state of the controller, 413 * continue initialisation, or acknowledge command and response 414 * interrupts, and process responses. 415 */ 416 static void 417 udaintr(arg) 418 void *arg; 419 { 420 struct uda_softc *sc = arg; 421 struct uba_softc *uh; 422 struct mscp_pack *ud; 423 424 sc->sc_wticks = 0; /* reset interrupt watchdog */ 425 426 /* ctlr fatal error */ 427 if (bus_space_read_2(sc->sc_iot, sc->sc_sah, 0) & MP_ERR) { 428 udasaerror(&sc->sc_dev, 1); 429 return; 430 } 431 ud = &sc->sc_uda; 432 /* 433 * Handle buffer purge requests. 434 * XXX - should be done in bus_dma_sync(). 435 */ 436 uh = (void *)sc->sc_dev.dv_parent; 437 if (ud->mp_ca.ca_bdp) { 438 if (uh->uh_ubapurge) 439 (*uh->uh_ubapurge)(uh, ud->mp_ca.ca_bdp); 440 ud->mp_ca.ca_bdp = 0; 441 /* signal purge complete */ 442 bus_space_write_2(sc->sc_iot, sc->sc_sah, 0, 0); 443 } 444 445 mscp_intr(sc->sc_softc); 446 } 447 448 /* 449 * A Unibus reset has occurred on UBA uban. Reinitialise the controller(s) 450 * on that Unibus, and requeue outstanding I/O. 451 */ 452 static void 453 udareset(struct device *dev) 454 { 455 struct uda_softc *sc = (void *)dev; 456 /* 457 * Our BDP (if any) is gone; our command (if any) is 458 * flushed; the device is no longer mapped; and the 459 * UDA50 is not yet initialised. 460 */ 461 if (sc->sc_unit.uu_bdp) { 462 /* printf("<%d>", UBAI_BDP(sc->sc_unit.uu_bdp)); */ 463 sc->sc_unit.uu_bdp = 0; 464 } 465 466 /* reset queues and requeue pending transfers */ 467 mscp_requeue(sc->sc_softc); 468 469 /* 470 * If it fails to initialise we will notice later and 471 * try again (and again...). Do not call udastart() 472 * here; it will be done after the controller finishes 473 * initialisation. 474 */ 475 /* XXX if (udainit(sc)) */ 476 printf(" (hung)"); 477 } 478 479 void 480 udactlrdone(usc) 481 struct device *usc; 482 { 483 struct uda_softc *sc = (void *)usc; 484 485 uba_done((struct uba_softc *)sc->sc_dev.dv_parent); 486 } 487