siop.c revision 1.43
1 /* $NetBSD: siop.c,v 1.43 2001/04/30 02:17:55 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 2000 Manuel Bouyer. 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. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Manuel Bouyer 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 */ 32 33 /* SYM53c7/8xx PCI-SCSI I/O Processors driver */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 #include <sys/malloc.h> 39 #include <sys/buf.h> 40 #include <sys/kernel.h> 41 42 #include <uvm/uvm_extern.h> 43 44 #include <machine/endian.h> 45 #include <machine/bus.h> 46 47 #include <dev/microcode/siop/siop.out> 48 49 #include <dev/scsipi/scsi_all.h> 50 #include <dev/scsipi/scsi_message.h> 51 #include <dev/scsipi/scsipi_all.h> 52 53 #include <dev/scsipi/scsiconf.h> 54 55 #include <dev/ic/siopreg.h> 56 #include <dev/ic/siopvar.h> 57 #include <dev/ic/siopvar_common.h> 58 59 #ifndef DEBUG 60 #undef DEBUG 61 #endif 62 #undef SIOP_DEBUG 63 #undef SIOP_DEBUG_DR 64 #undef SIOP_DEBUG_INTR 65 #undef SIOP_DEBUG_SCHED 66 #undef DUMP_SCRIPT 67 68 #define SIOP_STATS 69 70 #ifndef SIOP_DEFAULT_TARGET 71 #define SIOP_DEFAULT_TARGET 7 72 #endif 73 74 /* number of cmd descriptors per block */ 75 #define SIOP_NCMDPB (PAGE_SIZE / sizeof(struct siop_xfer)) 76 77 /* Number of scheduler slot (needs to match script) */ 78 #define SIOP_NSLOTS 40 79 80 void siop_reset __P((struct siop_softc *)); 81 void siop_handle_reset __P((struct siop_softc *)); 82 int siop_handle_qtag_reject __P((struct siop_cmd *)); 83 void siop_scsicmd_end __P((struct siop_cmd *)); 84 void siop_unqueue __P((struct siop_softc *, int, int)); 85 static void siop_start __P((struct siop_softc *, struct siop_cmd *)); 86 void siop_timeout __P((void *)); 87 int siop_scsicmd __P((struct scsipi_xfer *)); 88 void siop_scsipi_request __P((struct scsipi_channel *, 89 scsipi_adapter_req_t, void *)); 90 void siop_dump_script __P((struct siop_softc *)); 91 int siop_morecbd __P((struct siop_softc *)); 92 struct siop_lunsw *siop_get_lunsw __P((struct siop_softc *)); 93 void siop_add_reselsw __P((struct siop_softc *, int)); 94 void siop_update_scntl3 __P((struct siop_softc *, struct siop_target *)); 95 96 #ifdef SIOP_STATS 97 static int siop_stat_intr = 0; 98 static int siop_stat_intr_shortxfer = 0; 99 static int siop_stat_intr_sdp = 0; 100 static int siop_stat_intr_done = 0; 101 static int siop_stat_intr_xferdisc = 0; 102 static int siop_stat_intr_lunresel = 0; 103 static int siop_stat_intr_qfull = 0; 104 void siop_printstats __P((void)); 105 #define INCSTAT(x) x++ 106 #else 107 #define INCSTAT(x) 108 #endif 109 110 static __inline__ void siop_script_sync __P((struct siop_softc *, int)); 111 static __inline__ void 112 siop_script_sync(sc, ops) 113 struct siop_softc *sc; 114 int ops; 115 { 116 if ((sc->features & SF_CHIP_RAM) == 0) 117 bus_dmamap_sync(sc->sc_dmat, sc->sc_scriptdma, 0, 118 PAGE_SIZE, ops); 119 } 120 121 static __inline__ u_int32_t siop_script_read __P((struct siop_softc *, u_int)); 122 static __inline__ u_int32_t 123 siop_script_read(sc, offset) 124 struct siop_softc *sc; 125 u_int offset; 126 { 127 if (sc->features & SF_CHIP_RAM) { 128 return bus_space_read_4(sc->sc_ramt, sc->sc_ramh, offset * 4); 129 } else { 130 return le32toh(sc->sc_script[offset]); 131 } 132 } 133 134 static __inline__ void siop_script_write __P((struct siop_softc *, u_int, 135 u_int32_t)); 136 static __inline__ void 137 siop_script_write(sc, offset, val) 138 struct siop_softc *sc; 139 u_int offset; 140 u_int32_t val; 141 { 142 if (sc->features & SF_CHIP_RAM) { 143 bus_space_write_4(sc->sc_ramt, sc->sc_ramh, offset * 4, val); 144 } else { 145 sc->sc_script[offset] = htole32(val); 146 } 147 } 148 149 void 150 siop_attach(sc) 151 struct siop_softc *sc; 152 { 153 int error, i; 154 bus_dma_segment_t seg; 155 int rseg; 156 157 /* 158 * Allocate DMA-safe memory for the script and map it. 159 */ 160 if ((sc->features & SF_CHIP_RAM) == 0) { 161 error = bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE, 162 PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT); 163 if (error) { 164 printf("%s: unable to allocate script DMA memory, " 165 "error = %d\n", sc->sc_dev.dv_xname, error); 166 return; 167 } 168 error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, PAGE_SIZE, 169 (caddr_t *)&sc->sc_script, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 170 if (error) { 171 printf("%s: unable to map script DMA memory, " 172 "error = %d\n", sc->sc_dev.dv_xname, error); 173 return; 174 } 175 error = bus_dmamap_create(sc->sc_dmat, PAGE_SIZE, 1, 176 PAGE_SIZE, 0, BUS_DMA_NOWAIT, &sc->sc_scriptdma); 177 if (error) { 178 printf("%s: unable to create script DMA map, " 179 "error = %d\n", sc->sc_dev.dv_xname, error); 180 return; 181 } 182 error = bus_dmamap_load(sc->sc_dmat, sc->sc_scriptdma, 183 sc->sc_script, PAGE_SIZE, NULL, BUS_DMA_NOWAIT); 184 if (error) { 185 printf("%s: unable to load script DMA map, " 186 "error = %d\n", sc->sc_dev.dv_xname, error); 187 return; 188 } 189 sc->sc_scriptaddr = sc->sc_scriptdma->dm_segs[0].ds_addr; 190 sc->ram_size = PAGE_SIZE; 191 } 192 TAILQ_INIT(&sc->free_list); 193 TAILQ_INIT(&sc->cmds); 194 TAILQ_INIT(&sc->lunsw_list); 195 sc->sc_currschedslot = 0; 196 #ifdef SIOP_DEBUG 197 printf("%s: script size = %d, PHY addr=0x%x, VIRT=%p\n", 198 sc->sc_dev.dv_xname, (int)sizeof(siop_script), 199 (u_int32_t)sc->sc_scriptaddr, sc->sc_script); 200 #endif 201 202 sc->sc_adapt.adapt_dev = &sc->sc_dev; 203 sc->sc_adapt.adapt_nchannels = 1; 204 sc->sc_adapt.adapt_openings = 225; 205 sc->sc_adapt.adapt_max_periph = SIOP_NTAG - 1; 206 sc->sc_adapt.adapt_ioctl = siop_ioctl; 207 sc->sc_adapt.adapt_minphys = minphys; 208 sc->sc_adapt.adapt_request = siop_scsipi_request; 209 210 memset(&sc->sc_chan, 0, sizeof(sc->sc_chan)); 211 sc->sc_chan.chan_adapter = &sc->sc_adapt; 212 sc->sc_chan.chan_bustype = &scsi_bustype; 213 sc->sc_chan.chan_channel = 0; 214 sc->sc_chan.chan_ntargets = (sc->features & SF_BUS_WIDE) ? 16 : 8; 215 sc->sc_chan.chan_nluns = 8; 216 sc->sc_chan.chan_id = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCID); 217 if (sc->sc_chan.chan_id == 0 || 218 sc->sc_chan.chan_id >= sc->sc_chan.chan_ntargets) 219 sc->sc_chan.chan_id = SIOP_DEFAULT_TARGET; 220 221 for (i = 0; i < 16; i++) 222 sc->targets[i] = NULL; 223 224 /* find min/max sync period for this chip */ 225 sc->maxsync = 0; 226 sc->minsync = 255; 227 for (i = 0; i < sizeof(scf_period) / sizeof(scf_period[0]); i++) { 228 if (sc->clock_period != scf_period[i].clock) 229 continue; 230 if (sc->maxsync < scf_period[i].period) 231 sc->maxsync = scf_period[i].period; 232 if (sc->minsync > scf_period[i].period) 233 sc->minsync = scf_period[i].period; 234 } 235 if (sc->maxsync == 255 || sc->minsync == 0) 236 panic("siop: can't find my sync parameters\n"); 237 /* Do a bus reset, so that devices fall back to narrow/async */ 238 siop_resetbus(sc); 239 /* 240 * siop_reset() will reset the chip, thus clearing pending interrupts 241 */ 242 siop_reset(sc); 243 #ifdef DUMP_SCRIPT 244 siop_dump_script(sc); 245 #endif 246 247 config_found((struct device*)sc, &sc->sc_chan, scsiprint); 248 } 249 250 void 251 siop_reset(sc) 252 struct siop_softc *sc; 253 { 254 int i, j; 255 struct siop_lunsw *lunsw; 256 257 siop_common_reset(sc); 258 259 /* copy and patch the script */ 260 if (sc->features & SF_CHIP_RAM) { 261 bus_space_write_region_4(sc->sc_ramt, sc->sc_ramh, 0, 262 siop_script, sizeof(siop_script) / sizeof(siop_script[0])); 263 for (j = 0; j < 264 (sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0])); 265 j++) { 266 bus_space_write_4(sc->sc_ramt, sc->sc_ramh, 267 E_abs_msgin_Used[j] * 4, 268 sc->sc_scriptaddr + Ent_msgin_space); 269 } 270 } else { 271 for (j = 0; 272 j < (sizeof(siop_script) / sizeof(siop_script[0])); j++) { 273 sc->sc_script[j] = htole32(siop_script[j]); 274 } 275 for (j = 0; j < 276 (sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0])); 277 j++) { 278 sc->sc_script[E_abs_msgin_Used[j]] = 279 htole32(sc->sc_scriptaddr + Ent_msgin_space); 280 } 281 } 282 sc->script_free_lo = sizeof(siop_script) / sizeof(siop_script[0]); 283 sc->script_free_hi = sc->ram_size / 4; 284 285 /* free used and unused lun switches */ 286 while((lunsw = TAILQ_FIRST(&sc->lunsw_list)) != NULL) { 287 #ifdef SIOP_DEBUG 288 printf("%s: free lunsw at offset %d\n", 289 sc->sc_dev.dv_xname, lunsw->lunsw_off); 290 #endif 291 TAILQ_REMOVE(&sc->lunsw_list, lunsw, next); 292 free(lunsw, M_DEVBUF); 293 } 294 TAILQ_INIT(&sc->lunsw_list); 295 /* restore reselect switch */ 296 for (i = 0; i < sc->sc_chan.chan_ntargets; i++) { 297 if (sc->targets[i] == NULL) 298 continue; 299 #ifdef SIOP_DEBUG 300 printf("%s: restore sw for target %d\n", 301 sc->sc_dev.dv_xname, i); 302 #endif 303 free(sc->targets[i]->lunsw, M_DEVBUF); 304 sc->targets[i]->lunsw = siop_get_lunsw(sc); 305 if (sc->targets[i]->lunsw == NULL) { 306 printf("%s: can't alloc lunsw for target %d\n", 307 sc->sc_dev.dv_xname, i); 308 break; 309 } 310 siop_add_reselsw(sc, i); 311 } 312 313 /* start script */ 314 if ((sc->features & SF_CHIP_RAM) == 0) { 315 bus_dmamap_sync(sc->sc_dmat, sc->sc_scriptdma, 0, PAGE_SIZE, 316 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 317 } 318 bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, 319 sc->sc_scriptaddr + Ent_reselect); 320 } 321 322 #if 0 323 #define CALL_SCRIPT(ent) do {\ 324 printf ("start script DSA 0x%lx DSP 0x%lx\n", \ 325 siop_cmd->dsa, \ 326 sc->sc_scriptaddr + ent); \ 327 bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptaddr + ent); \ 328 } while (0) 329 #else 330 #define CALL_SCRIPT(ent) do {\ 331 bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptaddr + ent); \ 332 } while (0) 333 #endif 334 335 int 336 siop_intr(v) 337 void *v; 338 { 339 struct siop_softc *sc = v; 340 struct siop_target *siop_target; 341 struct siop_cmd *siop_cmd; 342 struct siop_lun *siop_lun; 343 struct scsipi_xfer *xs; 344 int istat, sist, sstat1, dstat; 345 u_int32_t irqcode; 346 int need_reset = 0; 347 int offset, target, lun, tag; 348 bus_addr_t dsa; 349 struct siop_cbd *cbdp; 350 int freetarget = 0; 351 int restart = 0; 352 353 istat = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT); 354 if ((istat & (ISTAT_INTF | ISTAT_DIP | ISTAT_SIP)) == 0) 355 return 0; 356 INCSTAT(siop_stat_intr); 357 if (istat & ISTAT_INTF) { 358 printf("INTRF\n"); 359 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT, ISTAT_INTF); 360 } 361 /* use DSA to find the current siop_cmd */ 362 dsa = bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA); 363 for (cbdp = TAILQ_FIRST(&sc->cmds); cbdp != NULL; 364 cbdp = TAILQ_NEXT(cbdp, next)) { 365 if (dsa >= cbdp->xferdma->dm_segs[0].ds_addr && 366 dsa < cbdp->xferdma->dm_segs[0].ds_addr + PAGE_SIZE) { 367 dsa -= cbdp->xferdma->dm_segs[0].ds_addr; 368 siop_cmd = &cbdp->cmds[dsa / sizeof(struct siop_xfer)]; 369 siop_table_sync(siop_cmd, 370 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 371 break; 372 } 373 } 374 if (cbdp == NULL) { 375 siop_cmd = NULL; 376 } 377 if (siop_cmd) { 378 xs = siop_cmd->xs; 379 siop_target = siop_cmd->siop_target; 380 target = siop_cmd->xs->xs_periph->periph_target; 381 lun = siop_cmd->xs->xs_periph->periph_lun; 382 tag = siop_cmd->tag; 383 siop_lun = siop_target->siop_lun[lun]; 384 #ifdef DIAGNOSTIC 385 if (siop_cmd->status != CMDST_ACTIVE) { 386 printf("siop_cmd (lun %d) not active (%d)\n", 387 lun, siop_cmd->status); 388 xs = NULL; 389 siop_target = NULL; 390 target = -1; 391 lun = -1; 392 tag = -1; 393 siop_lun = NULL; 394 siop_cmd = NULL; 395 } else if (siop_lun->siop_tag[tag].active != siop_cmd) { 396 printf("siop_cmd (lun %d tag %d) not in siop_lun " 397 "active (%p != %p)\n", lun, tag, siop_cmd, 398 siop_lun->siop_tag[tag].active); 399 } 400 #endif 401 } else { 402 xs = NULL; 403 siop_target = NULL; 404 target = -1; 405 lun = -1; 406 tag = -1; 407 siop_lun = NULL; 408 } 409 if (istat & ISTAT_DIP) { 410 dstat = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DSTAT); 411 if (dstat & DSTAT_SSI) { 412 printf("single step dsp 0x%08x dsa 0x08%x\n", 413 (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - 414 sc->sc_scriptaddr), 415 bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA)); 416 if ((dstat & ~(DSTAT_DFE | DSTAT_SSI)) == 0 && 417 (istat & ISTAT_SIP) == 0) { 418 bus_space_write_1(sc->sc_rt, sc->sc_rh, 419 SIOP_DCNTL, bus_space_read_1(sc->sc_rt, 420 sc->sc_rh, SIOP_DCNTL) | DCNTL_STD); 421 } 422 return 1; 423 } 424 if (dstat & ~(DSTAT_SIR | DSTAT_DFE | DSTAT_SSI)) { 425 printf("DMA IRQ:"); 426 if (dstat & DSTAT_IID) 427 printf(" Illegal instruction"); 428 if (dstat & DSTAT_ABRT) 429 printf(" abort"); 430 if (dstat & DSTAT_BF) 431 printf(" bus fault"); 432 if (dstat & DSTAT_MDPE) 433 printf(" parity"); 434 if (dstat & DSTAT_DFE) 435 printf(" dma fifo empty"); 436 printf(", DSP=0x%x DSA=0x%x: ", 437 (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - 438 sc->sc_scriptaddr), 439 bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA)); 440 if (siop_cmd) 441 printf("last msg_in=0x%x status=0x%x\n", 442 siop_cmd->siop_tables.msg_in[0], 443 le32toh(siop_cmd->siop_tables.status)); 444 else 445 printf("%s: current DSA invalid\n", 446 sc->sc_dev.dv_xname); 447 need_reset = 1; 448 } 449 } 450 if (istat & ISTAT_SIP) { 451 if (istat & ISTAT_DIP) 452 delay(10); 453 /* 454 * Can't read sist0 & sist1 independantly, or we have to 455 * insert delay 456 */ 457 sist = bus_space_read_2(sc->sc_rt, sc->sc_rh, SIOP_SIST0); 458 sstat1 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1); 459 #ifdef SIOP_DEBUG_INTR 460 printf("scsi interrupt, sist=0x%x sstat1=0x%x " 461 "DSA=0x%x DSP=0x%lx\n", sist, 462 bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1), 463 bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA), 464 (u_long)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - 465 sc->sc_scriptaddr)); 466 #endif 467 if (sist & SIST0_RST) { 468 siop_handle_reset(sc); 469 /* no table to flush here */ 470 return 1; 471 } 472 if (sist & SIST0_SGE) { 473 if (siop_cmd) 474 scsipi_printaddr(xs->xs_periph); 475 else 476 printf("%s:", sc->sc_dev.dv_xname); 477 printf("scsi gross error\n"); 478 goto reset; 479 } 480 if ((sist & SIST0_MA) && need_reset == 0) { 481 if (siop_cmd) { 482 int scratcha0; 483 dstat = bus_space_read_1(sc->sc_rt, sc->sc_rh, 484 SIOP_DSTAT); 485 /* 486 * first restore DSA, in case we were in a S/G 487 * operation. 488 */ 489 bus_space_write_4(sc->sc_rt, sc->sc_rh, 490 SIOP_DSA, siop_cmd->dsa); 491 scratcha0 = bus_space_read_1(sc->sc_rt, 492 sc->sc_rh, SIOP_SCRATCHA); 493 switch (sstat1 & SSTAT1_PHASE_MASK) { 494 case SSTAT1_PHASE_STATUS: 495 /* 496 * previous phase may be aborted for any reason 497 * ( for example, the target has less data to 498 * transfer than requested). Just go to status 499 * and the command should terminate. 500 */ 501 INCSTAT(siop_stat_intr_shortxfer); 502 if ((dstat & DSTAT_DFE) == 0) 503 siop_clearfifo(sc); 504 /* no table to flush here */ 505 CALL_SCRIPT(Ent_status); 506 return 1; 507 case SSTAT1_PHASE_MSGIN: 508 /* 509 * target may be ready to disconnect 510 * Save data pointers just in case. 511 */ 512 INCSTAT(siop_stat_intr_xferdisc); 513 if (scratcha0 & A_flag_data) 514 siop_sdp(siop_cmd); 515 else if ((dstat & DSTAT_DFE) == 0) 516 siop_clearfifo(sc); 517 bus_space_write_1(sc->sc_rt, sc->sc_rh, 518 SIOP_SCRATCHA, 519 scratcha0 & ~A_flag_data); 520 siop_table_sync(siop_cmd, 521 BUS_DMASYNC_PREREAD | 522 BUS_DMASYNC_PREWRITE); 523 CALL_SCRIPT(Ent_msgin); 524 return 1; 525 } 526 printf("%s: unexpected phase mismatch %d\n", 527 sc->sc_dev.dv_xname, 528 sstat1 & SSTAT1_PHASE_MASK); 529 } else { 530 printf("%s: phase mismatch without command\n", 531 sc->sc_dev.dv_xname); 532 } 533 need_reset = 1; 534 } 535 if (sist & SIST0_PAR) { 536 /* parity error, reset */ 537 if (siop_cmd) 538 scsipi_printaddr(xs->xs_periph); 539 else 540 printf("%s:", sc->sc_dev.dv_xname); 541 printf("parity error\n"); 542 goto reset; 543 } 544 if ((sist & (SIST1_STO << 8)) && need_reset == 0) { 545 /* selection time out, assume there's no device here */ 546 if (siop_cmd) { 547 siop_cmd->status = CMDST_DONE; 548 xs->error = XS_SELTIMEOUT; 549 freetarget = 1; 550 goto end; 551 } else { 552 printf("%s: selection timeout without " 553 "command\n", sc->sc_dev.dv_xname); 554 need_reset = 1; 555 } 556 } 557 if (sist & SIST0_UDC) { 558 /* 559 * unexpected disconnect. Usually the target signals 560 * a fatal condition this way. Attempt to get sense. 561 */ 562 if (siop_cmd) { 563 siop_cmd->siop_tables.status = 564 htole32(SCSI_CHECK); 565 goto end; 566 } 567 printf("%s: unexpected disconnect without " 568 "command\n", sc->sc_dev.dv_xname); 569 goto reset; 570 } 571 if (sist & (SIST1_SBMC << 8)) { 572 /* SCSI bus mode change */ 573 if (siop_modechange(sc) == 0 || need_reset == 1) 574 goto reset; 575 if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { 576 /* 577 * we have a script interrupt, it will 578 * restart the script. 579 */ 580 goto scintr; 581 } 582 /* 583 * else we have to restart it ourselve, at the 584 * interrupted instruction. 585 */ 586 bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, 587 bus_space_read_4(sc->sc_rt, sc->sc_rh, 588 SIOP_DSP) - 8); 589 return 1; 590 } 591 /* Else it's an unhandled exeption (for now). */ 592 printf("%s: unhandled scsi interrupt, sist=0x%x sstat1=0x%x " 593 "DSA=0x%x DSP=0x%x\n", sc->sc_dev.dv_xname, sist, 594 bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1), 595 bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA), 596 (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - 597 sc->sc_scriptaddr)); 598 if (siop_cmd) { 599 siop_cmd->status = CMDST_DONE; 600 xs->error = XS_SELTIMEOUT; 601 goto end; 602 } 603 need_reset = 1; 604 } 605 if (need_reset) { 606 reset: 607 /* fatal error, reset the bus */ 608 siop_resetbus(sc); 609 /* no table to flush here */ 610 return 1; 611 } 612 613 scintr: 614 if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { /* script interrupt */ 615 irqcode = bus_space_read_4(sc->sc_rt, sc->sc_rh, 616 SIOP_DSPS); 617 #ifdef SIOP_DEBUG_INTR 618 printf("script interrupt 0x%x\n", irqcode); 619 #endif 620 /* 621 * no command, or an inactive command is only valid for a 622 * reselect interrupt 623 */ 624 if ((irqcode & 0x80) == 0) { 625 if (siop_cmd == NULL) { 626 printf( 627 "%s: script interrupt (0x%x) with invalid DSA !!!\n", 628 sc->sc_dev.dv_xname, irqcode); 629 goto reset; 630 } 631 if (siop_cmd->status != CMDST_ACTIVE) { 632 printf("%s: command with invalid status " 633 "(IRQ code 0x%x current status %d) !\n", 634 sc->sc_dev.dv_xname, 635 irqcode, siop_cmd->status); 636 xs = NULL; 637 } 638 } 639 switch(irqcode) { 640 case A_int_err: 641 printf("error, DSP=0x%x\n", 642 (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, 643 SIOP_DSP) - sc->sc_scriptaddr)); 644 if (xs) { 645 xs->error = XS_SELTIMEOUT; 646 goto end; 647 } else { 648 goto reset; 649 } 650 case A_int_reseltarg: 651 printf("%s: reselect with invalid target\n", 652 sc->sc_dev.dv_xname); 653 goto reset; 654 case A_int_resellun: 655 INCSTAT(siop_stat_intr_lunresel); 656 target = bus_space_read_1(sc->sc_rt, sc->sc_rh, 657 SIOP_SCRATCHA) & 0xf; 658 lun = bus_space_read_1(sc->sc_rt, sc->sc_rh, 659 SIOP_SCRATCHA + 1); 660 tag = bus_space_read_1(sc->sc_rt, sc->sc_rh, 661 SIOP_SCRATCHA + 2); 662 siop_target = sc->targets[target]; 663 if (siop_target == NULL) { 664 printf("%s: reselect with invalid " 665 "target %d\n", sc->sc_dev.dv_xname, target); 666 goto reset; 667 } 668 siop_lun = siop_target->siop_lun[lun]; 669 if (siop_lun == NULL) { 670 printf("%s: target %d reselect with invalid " 671 "lun %d\n", sc->sc_dev.dv_xname, 672 target, lun); 673 goto reset; 674 } 675 if (siop_lun->siop_tag[tag].active == NULL) { 676 printf("%s: target %d lun %d tag %d reselect " 677 "without command\n", sc->sc_dev.dv_xname, 678 target, lun, tag); 679 goto reset; 680 } 681 siop_cmd = siop_lun->siop_tag[tag].active; 682 bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, 683 siop_cmd->dsa + sizeof(struct siop_xfer_common) + 684 Ent_ldsa_reload_dsa); 685 siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE); 686 return 1; 687 case A_int_reseltag: 688 printf("%s: reselect with invalid tag\n", 689 sc->sc_dev.dv_xname); 690 goto reset; 691 case A_int_msgin: 692 { 693 int msgin = bus_space_read_1(sc->sc_rt, sc->sc_rh, 694 SIOP_SFBR); 695 if (msgin == MSG_MESSAGE_REJECT) { 696 int msg, extmsg; 697 if (siop_cmd->siop_tables.msg_out[0] & 0x80) { 698 /* 699 * message was part of a identify + 700 * something else. Identify shoudl't 701 * have been rejected. 702 */ 703 msg = siop_cmd->siop_tables.msg_out[1]; 704 extmsg = 705 siop_cmd->siop_tables.msg_out[3]; 706 } else { 707 msg = siop_cmd->siop_tables.msg_out[0]; 708 extmsg = 709 siop_cmd->siop_tables.msg_out[2]; 710 } 711 if (msg == MSG_MESSAGE_REJECT) { 712 /* MSG_REJECT for a MSG_REJECT !*/ 713 if (xs) 714 scsipi_printaddr(xs->xs_periph); 715 else 716 printf("%s: ", 717 sc->sc_dev.dv_xname); 718 printf("our reject message was " 719 "rejected\n"); 720 goto reset; 721 } 722 if (msg == MSG_EXTENDED && 723 extmsg == MSG_EXT_WDTR) { 724 /* WDTR rejected, initiate sync */ 725 if ((siop_target->flags & TARF_SYNC) 726 == 0) { 727 siop_target->status = TARST_OK; 728 siop_update_xfer_mode(sc, 729 target); 730 /* no table to flush here */ 731 CALL_SCRIPT(Ent_msgin_ack); 732 return 1; 733 } 734 siop_target->status = TARST_SYNC_NEG; 735 siop_sdtr_msg(siop_cmd, 0, 736 sc->minsync, sc->maxoff); 737 siop_table_sync(siop_cmd, 738 BUS_DMASYNC_PREREAD | 739 BUS_DMASYNC_PREWRITE); 740 CALL_SCRIPT(Ent_send_msgout); 741 return 1; 742 } else if (msg == MSG_EXTENDED && 743 extmsg == MSG_EXT_SDTR) { 744 /* sync rejected */ 745 siop_target->offset = 0; 746 siop_target->period = 0; 747 siop_target->status = TARST_OK; 748 siop_update_xfer_mode(sc, target); 749 /* no table to flush here */ 750 CALL_SCRIPT(Ent_msgin_ack); 751 return 1; 752 } else if (msg == MSG_SIMPLE_Q_TAG || 753 msg == MSG_HEAD_OF_Q_TAG || 754 msg == MSG_ORDERED_Q_TAG) { 755 if (siop_handle_qtag_reject( 756 siop_cmd) == -1) 757 goto reset; 758 CALL_SCRIPT(Ent_msgin_ack); 759 return 1; 760 } 761 if (xs) 762 scsipi_printaddr(xs->xs_periph); 763 else 764 printf("%s: ", sc->sc_dev.dv_xname); 765 if (msg == MSG_EXTENDED) { 766 printf("scsi message reject, extended " 767 "message sent was 0x%x\n", extmsg); 768 } else { 769 printf("scsi message reject, message " 770 "sent was 0x%x\n", msg); 771 } 772 /* no table to flush here */ 773 CALL_SCRIPT(Ent_msgin_ack); 774 return 1; 775 } 776 if (xs) 777 scsipi_printaddr(xs->xs_periph); 778 else 779 printf("%s: ", sc->sc_dev.dv_xname); 780 printf("unhandled message 0x%x\n", 781 siop_cmd->siop_tables.msg_in[0]); 782 siop_cmd->siop_tables.msg_out[0] = MSG_MESSAGE_REJECT; 783 siop_cmd->siop_tables.t_msgout.count= htole32(1); 784 siop_table_sync(siop_cmd, 785 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 786 CALL_SCRIPT(Ent_send_msgout); 787 return 1; 788 } 789 case A_int_extmsgin: 790 #ifdef SIOP_DEBUG_INTR 791 printf("extended message: msg 0x%x len %d\n", 792 siop_cmd->siop_tables.msg_in[2], 793 siop_cmd->siop_tables.msg_in[1]); 794 #endif 795 if (siop_cmd->siop_tables.msg_in[1] > 6) 796 printf("%s: extended message too big (%d)\n", 797 sc->sc_dev.dv_xname, 798 siop_cmd->siop_tables.msg_in[1]); 799 siop_cmd->siop_tables.t_extmsgdata.count = 800 htole32(siop_cmd->siop_tables.msg_in[1] - 1); 801 siop_table_sync(siop_cmd, 802 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 803 CALL_SCRIPT(Ent_get_extmsgdata); 804 return 1; 805 case A_int_extmsgdata: 806 #ifdef SIOP_DEBUG_INTR 807 { 808 int i; 809 printf("extended message: 0x%x, data:", 810 siop_cmd->siop_tables.msg_in[2]); 811 for (i = 3; i < 2 + siop_cmd->siop_tables.msg_in[1]; 812 i++) 813 printf(" 0x%x", 814 siop_cmd->siop_tables.msg_in[i]); 815 printf("\n"); 816 } 817 #endif 818 if (siop_cmd->siop_tables.msg_in[2] == MSG_EXT_WDTR) { 819 switch (siop_wdtr_neg(siop_cmd)) { 820 case SIOP_NEG_MSGOUT: 821 siop_update_scntl3(sc, 822 siop_cmd->siop_target); 823 siop_table_sync(siop_cmd, 824 BUS_DMASYNC_PREREAD | 825 BUS_DMASYNC_PREWRITE); 826 CALL_SCRIPT(Ent_send_msgout); 827 return(1); 828 case SIOP_NEG_ACK: 829 siop_update_scntl3(sc, 830 siop_cmd->siop_target); 831 CALL_SCRIPT(Ent_msgin_ack); 832 return(1); 833 default: 834 panic("invalid retval from " 835 "siop_wdtr_neg()"); 836 } 837 return(1); 838 } 839 if (siop_cmd->siop_tables.msg_in[2] == MSG_EXT_SDTR) { 840 switch (siop_sdtr_neg(siop_cmd)) { 841 case SIOP_NEG_MSGOUT: 842 siop_update_scntl3(sc, 843 siop_cmd->siop_target); 844 siop_table_sync(siop_cmd, 845 BUS_DMASYNC_PREREAD | 846 BUS_DMASYNC_PREWRITE); 847 CALL_SCRIPT(Ent_send_msgout); 848 return(1); 849 case SIOP_NEG_ACK: 850 siop_update_scntl3(sc, 851 siop_cmd->siop_target); 852 CALL_SCRIPT(Ent_msgin_ack); 853 return(1); 854 default: 855 panic("invalid retval from " 856 "siop_wdtr_neg()"); 857 } 858 return(1); 859 } 860 /* send a message reject */ 861 siop_cmd->siop_tables.msg_out[0] = MSG_MESSAGE_REJECT; 862 siop_cmd->siop_tables.t_msgout.count = htole32(1); 863 siop_table_sync(siop_cmd, 864 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 865 CALL_SCRIPT(Ent_send_msgout); 866 return 1; 867 case A_int_disc: 868 INCSTAT(siop_stat_intr_sdp); 869 offset = bus_space_read_1(sc->sc_rt, sc->sc_rh, 870 SIOP_SCRATCHA + 1); 871 #ifdef SIOP_DEBUG_DR 872 printf("disconnect offset %d\n", offset); 873 #endif 874 if (offset > SIOP_NSG) { 875 printf("%s: bad offset for disconnect (%d)\n", 876 sc->sc_dev.dv_xname, offset); 877 goto reset; 878 } 879 /* 880 * offset == SIOP_NSG may be a valid condition if 881 * we get a sdp when the xfer is done. 882 * Don't call memmove in this case. 883 */ 884 if (offset < SIOP_NSG) { 885 memmove(&siop_cmd->siop_tables.data[0], 886 &siop_cmd->siop_tables.data[offset], 887 (SIOP_NSG - offset) * sizeof(scr_table_t)); 888 siop_table_sync(siop_cmd, 889 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 890 } 891 CALL_SCRIPT(Ent_script_sched); 892 return 1; 893 case A_int_resfail: 894 printf("reselect failed\n"); 895 CALL_SCRIPT(Ent_script_sched); 896 return 1; 897 case A_int_done: 898 if (xs == NULL) { 899 printf("%s: done without command, DSA=0x%lx\n", 900 sc->sc_dev.dv_xname, (u_long)siop_cmd->dsa); 901 siop_cmd->status = CMDST_FREE; 902 CALL_SCRIPT(Ent_script_sched); 903 return 1; 904 } 905 #ifdef SIOP_DEBUG_INTR 906 printf("done, DSA=0x%lx target id 0x%x last msg " 907 "in=0x%x status=0x%x\n", (u_long)siop_cmd->dsa, 908 le32toh(siop_cmd->siop_tables.id), 909 siop_cmd->siop_tables.msg_in[0], 910 le32toh(siop_cmd->siop_tables.status)); 911 #endif 912 INCSTAT(siop_stat_intr_done); 913 siop_cmd->status = CMDST_DONE; 914 goto end; 915 default: 916 printf("unknown irqcode %x\n", irqcode); 917 if (xs) { 918 xs->error = XS_SELTIMEOUT; 919 goto end; 920 } 921 goto reset; 922 } 923 return 1; 924 } 925 /* We just should't get there */ 926 panic("siop_intr: I shouldn't be there !"); 927 return 1; 928 end: 929 /* 930 * restart the script now if command completed properly 931 * Otherwise wait for siop_scsicmd_end(), we may need to cleanup the 932 * queue 933 */ 934 xs->status = le32toh(siop_cmd->siop_tables.status); 935 if (xs->status == SCSI_OK) 936 CALL_SCRIPT(Ent_script_sched); 937 else 938 restart = 1; 939 siop_lun->siop_tag[tag].active = NULL; 940 if (sc->sc_flags & SCF_CHAN_NOSLOT) { 941 /* a command terminated, so we have free slots now */ 942 sc->sc_flags &= ~SCF_CHAN_NOSLOT; 943 scsipi_channel_thaw(&sc->sc_chan, 1); 944 } 945 siop_scsicmd_end(siop_cmd); 946 if (freetarget && siop_target->status == TARST_PROBING) 947 siop_del_dev(sc, target, lun); 948 if (restart) 949 CALL_SCRIPT(Ent_script_sched); 950 951 return 1; 952 } 953 954 void 955 siop_scsicmd_end(siop_cmd) 956 struct siop_cmd *siop_cmd; 957 { 958 struct scsipi_xfer *xs = siop_cmd->xs; 959 struct siop_softc *sc = siop_cmd->siop_sc; 960 961 switch(xs->status) { 962 case SCSI_OK: 963 xs->error = XS_NOERROR; 964 break; 965 case SCSI_BUSY: 966 xs->error = XS_BUSY; 967 break; 968 case SCSI_CHECK: 969 xs->error = XS_BUSY; 970 /* remove commands in the queue and scheduler */ 971 siop_unqueue(sc, xs->xs_periph->periph_target, 972 xs->xs_periph->periph_lun); 973 break; 974 case SCSI_QUEUE_FULL: 975 INCSTAT(siop_stat_intr_qfull); 976 #ifdef SIOP_DEBUG 977 printf("%s:%d:%d: queue full (tag %d)\n", sc->sc_dev.dv_xname, 978 xs->xs_periph->periph_target, 979 xs->xs_periph->periph_lun, siop_cmd->tag); 980 #endif 981 xs->error = XS_BUSY; 982 break; 983 case SCSI_SIOP_NOCHECK: 984 /* 985 * don't check status, xs->error is already valid 986 */ 987 break; 988 case SCSI_SIOP_NOSTATUS: 989 /* 990 * the status byte was not updated, cmd was 991 * aborted 992 */ 993 xs->error = XS_SELTIMEOUT; 994 break; 995 default: 996 xs->error = XS_DRIVER_STUFFUP; 997 } 998 if (xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) { 999 bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, 0, 1000 siop_cmd->dmamap_data->dm_mapsize, 1001 (xs->xs_control & XS_CTL_DATA_IN) ? 1002 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 1003 bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_data); 1004 } 1005 bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd); 1006 callout_stop(&siop_cmd->xs->xs_callout); 1007 siop_cmd->status = CMDST_FREE; 1008 TAILQ_INSERT_TAIL(&sc->free_list, siop_cmd, next); 1009 xs->resid = 0; 1010 scsipi_done (xs); 1011 } 1012 1013 void 1014 siop_unqueue(sc, target, lun) 1015 struct siop_softc *sc; 1016 int target; 1017 int lun; 1018 { 1019 int slot, tag; 1020 struct siop_cmd *siop_cmd; 1021 struct siop_lun *siop_lun = sc->targets[target]->siop_lun[lun]; 1022 1023 /* first make sure to read valid data */ 1024 siop_script_sync(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1025 1026 for (tag = 1; tag < SIOP_NTAG; tag++) { 1027 /* look for commands in the scheduler, not yet started */ 1028 if (siop_lun->siop_tag[tag].active == NULL) 1029 continue; 1030 siop_cmd = siop_lun->siop_tag[tag].active; 1031 for (slot = 0; slot <= sc->sc_currschedslot; slot++) { 1032 if (siop_script_read(sc, 1033 (Ent_script_sched_slot0 / 4) + slot * 2 + 1) == 1034 siop_cmd->dsa + sizeof(struct siop_xfer_common) + 1035 Ent_ldsa_select) 1036 break; 1037 } 1038 if (slot > sc->sc_currschedslot) 1039 continue; /* didn't find it */ 1040 if (siop_script_read(sc, 1041 (Ent_script_sched_slot0 / 4) + slot * 2) == 0x80000000) 1042 continue; /* already started */ 1043 /* clear the slot */ 1044 siop_script_write(sc, (Ent_script_sched_slot0 / 4) + slot * 2, 1045 0x80000000); 1046 /* ask to requeue */ 1047 siop_cmd->xs->error = XS_REQUEUE; 1048 siop_cmd->xs->status = SCSI_SIOP_NOCHECK; 1049 siop_lun->siop_tag[tag].active = NULL; 1050 siop_scsicmd_end(siop_cmd); 1051 } 1052 /* update sc_currschedslot */ 1053 sc->sc_currschedslot = 0; 1054 for (slot = SIOP_NSLOTS - 1; slot >= 0; slot--) { 1055 if (siop_script_read(sc, 1056 (Ent_script_sched_slot0 / 4) + slot * 2) != 0x80000000) 1057 sc->sc_currschedslot = slot; 1058 } 1059 } 1060 1061 /* 1062 * handle a rejected queue tag message: the command will run untagged, 1063 * has to adjust the reselect script. 1064 */ 1065 int 1066 siop_handle_qtag_reject(siop_cmd) 1067 struct siop_cmd *siop_cmd; 1068 { 1069 struct siop_softc *sc = siop_cmd->siop_sc; 1070 int target = siop_cmd->xs->xs_periph->periph_target; 1071 int lun = siop_cmd->xs->xs_periph->periph_lun; 1072 int tag = siop_cmd->siop_tables.msg_out[2]; 1073 struct siop_lun *siop_lun = sc->targets[target]->siop_lun[lun]; 1074 1075 #ifdef SIOP_DEBUG 1076 printf("%s:%d:%d: tag message %d (%d) rejected (status %d)\n", 1077 sc->sc_dev.dv_xname, target, lun, tag, siop_cmd->tag, 1078 siop_cmd->status); 1079 #endif 1080 1081 if (siop_lun->siop_tag[0].active != NULL) { 1082 printf("%s: untagged command already running for target %d " 1083 "lun %d (status %d)\n", sc->sc_dev.dv_xname, target, lun, 1084 siop_lun->siop_tag[0].active->status); 1085 return -1; 1086 } 1087 /* clear tag slot */ 1088 siop_lun->siop_tag[tag].active = NULL; 1089 /* add command to non-tagged slot */ 1090 siop_lun->siop_tag[0].active = siop_cmd; 1091 siop_cmd->tag = 0; 1092 /* adjust reselect script if there is one */ 1093 if (siop_lun->siop_tag[0].reseloff > 0) { 1094 siop_script_write(sc, 1095 siop_lun->siop_tag[0].reseloff + 1, 1096 siop_cmd->dsa + sizeof(struct siop_xfer_common) + 1097 Ent_ldsa_reload_dsa); 1098 siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE); 1099 } 1100 return 0; 1101 } 1102 1103 /* 1104 * handle a bus reset: reset chip, unqueue all active commands, free all 1105 * target struct and report loosage to upper layer. 1106 * As the upper layer may requeue immediatly we have to first store 1107 * all active commands in a temporary queue. 1108 */ 1109 void 1110 siop_handle_reset(sc) 1111 struct siop_softc *sc; 1112 { 1113 struct siop_cmd *siop_cmd; 1114 struct siop_lun *siop_lun; 1115 int target, lun, tag; 1116 /* 1117 * scsi bus reset. reset the chip and restart 1118 * the queue. Need to clean up all active commands 1119 */ 1120 printf("%s: scsi bus reset\n", sc->sc_dev.dv_xname); 1121 /* stop, reset and restart the chip */ 1122 siop_reset(sc); 1123 if (sc->sc_flags & SCF_CHAN_NOSLOT) { 1124 /* chip has been reset, all slots are free now */ 1125 sc->sc_flags &= ~SCF_CHAN_NOSLOT; 1126 scsipi_channel_thaw(&sc->sc_chan, 1); 1127 } 1128 /* 1129 * Process all commands: first commmands being executed 1130 */ 1131 for (target = 0; target < sc->sc_chan.chan_ntargets; 1132 target++) { 1133 if (sc->targets[target] == NULL) 1134 continue; 1135 for (lun = 0; lun < 8; lun++) { 1136 siop_lun = sc->targets[target]->siop_lun[lun]; 1137 if (siop_lun == NULL) 1138 continue; 1139 for (tag = 0; tag < 1140 ((sc->targets[target]->flags & TARF_TAG) ? 1141 SIOP_NTAG : 1); 1142 tag++) { 1143 siop_cmd = siop_lun->siop_tag[tag].active; 1144 if (siop_cmd == NULL) 1145 continue; 1146 scsipi_printaddr(siop_cmd->xs->xs_periph); 1147 printf("command with tag id %d reset\n", tag); 1148 siop_cmd->xs->error = 1149 (siop_cmd->flags & CMDFL_TIMEOUT) ? 1150 XS_TIMEOUT : XS_RESET; 1151 siop_cmd->xs->status = SCSI_SIOP_NOCHECK; 1152 siop_lun->siop_tag[tag].active = NULL; 1153 siop_cmd->status = CMDST_DONE; 1154 siop_scsicmd_end(siop_cmd); 1155 } 1156 } 1157 sc->targets[target]->status = TARST_ASYNC; 1158 sc->targets[target]->flags &= ~TARF_ISWIDE; 1159 sc->targets[target]->period = sc->targets[target]->offset = 0; 1160 siop_update_xfer_mode(sc, target); 1161 } 1162 1163 scsipi_async_event(&sc->sc_chan, ASYNC_EVENT_RESET, NULL); 1164 } 1165 1166 void 1167 siop_scsipi_request(chan, req, arg) 1168 struct scsipi_channel *chan; 1169 scsipi_adapter_req_t req; 1170 void *arg; 1171 { 1172 struct scsipi_xfer *xs; 1173 struct scsipi_periph *periph; 1174 struct siop_softc *sc = (void *)chan->chan_adapter->adapt_dev; 1175 struct siop_cmd *siop_cmd; 1176 int s, error, i; 1177 int target; 1178 int lun; 1179 1180 switch (req) { 1181 case ADAPTER_REQ_RUN_XFER: 1182 xs = arg; 1183 periph = xs->xs_periph; 1184 target = periph->periph_target; 1185 lun = periph->periph_lun; 1186 1187 s = splbio(); 1188 #ifdef SIOP_DEBUG_SCHED 1189 printf("starting cmd for %d:%d\n", target, lun); 1190 #endif 1191 siop_cmd = TAILQ_FIRST(&sc->free_list); 1192 if (siop_cmd) { 1193 TAILQ_REMOVE(&sc->free_list, siop_cmd, next); 1194 } else { 1195 if (siop_morecbd(sc) == 0) { 1196 siop_cmd = TAILQ_FIRST(&sc->free_list); 1197 #ifdef DIAGNOSTIC 1198 if (siop_cmd == NULL) 1199 panic("siop_morecbd succeed and does nothing"); 1200 #endif 1201 TAILQ_REMOVE(&sc->free_list, siop_cmd, next); 1202 } 1203 } 1204 if (siop_cmd == NULL) { 1205 xs->error = XS_RESOURCE_SHORTAGE; 1206 scsipi_done(xs); 1207 splx(s); 1208 return; 1209 } 1210 #ifdef DIAGNOSTIC 1211 if (siop_cmd->status != CMDST_FREE) 1212 panic("siop_scsicmd: new cmd not free"); 1213 #endif 1214 if (sc->targets[target] == NULL) { 1215 #ifdef SIOP_DEBUG 1216 printf("%s: alloc siop_target for target %d\n", 1217 sc->sc_dev.dv_xname, target); 1218 #endif 1219 sc->targets[target] = 1220 malloc(sizeof(struct siop_target), 1221 M_DEVBUF, M_NOWAIT); 1222 if (sc->targets[target] == NULL) { 1223 printf("%s: can't malloc memory for " 1224 "target %d\n", sc->sc_dev.dv_xname, target); 1225 xs->error = XS_RESOURCE_SHORTAGE; 1226 scsipi_done(xs); 1227 splx(s); 1228 return; 1229 } 1230 sc->targets[target]->status = TARST_PROBING; 1231 sc->targets[target]->flags = 0; 1232 sc->targets[target]->id = 1233 sc->clock_div << 24; /* scntl3 */ 1234 sc->targets[target]->id |= target << 16; /* id */ 1235 /* sc->targets[target]->id |= 0x0 << 8; scxfer is 0 */ 1236 1237 /* get a lun switch script */ 1238 sc->targets[target]->lunsw = siop_get_lunsw(sc); 1239 if (sc->targets[target]->lunsw == NULL) { 1240 printf("%s: can't alloc lunsw for target %d\n", 1241 sc->sc_dev.dv_xname, target); 1242 xs->error = XS_RESOURCE_SHORTAGE; 1243 scsipi_done(xs); 1244 splx(s); 1245 return; 1246 } 1247 for (i=0; i < 8; i++) 1248 sc->targets[target]->siop_lun[i] = NULL; 1249 siop_add_reselsw(sc, target); 1250 } 1251 if (sc->targets[target]->siop_lun[lun] == NULL) { 1252 sc->targets[target]->siop_lun[lun] = 1253 malloc(sizeof(struct siop_lun), M_DEVBUF, M_NOWAIT); 1254 if (sc->targets[target]->siop_lun[lun] == NULL) { 1255 printf("%s: can't alloc siop_lun for " 1256 "target %d lun %d\n", 1257 sc->sc_dev.dv_xname, target, lun); 1258 xs->error = XS_RESOURCE_SHORTAGE; 1259 scsipi_done(xs); 1260 splx(s); 1261 return; 1262 } 1263 memset(sc->targets[target]->siop_lun[lun], 0, 1264 sizeof(struct siop_lun)); 1265 } 1266 siop_cmd->siop_target = sc->targets[target]; 1267 siop_cmd->xs = xs; 1268 siop_cmd->flags = 0; 1269 siop_cmd->status = CMDST_READY; 1270 1271 /* load the DMA maps */ 1272 error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_cmd, 1273 xs->cmd, xs->cmdlen, NULL, BUS_DMA_NOWAIT); 1274 if (error) { 1275 printf("%s: unable to load cmd DMA map: %d\n", 1276 sc->sc_dev.dv_xname, error); 1277 xs->error = XS_DRIVER_STUFFUP; 1278 scsipi_done(xs); 1279 splx(s); 1280 return; 1281 } 1282 if (xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) { 1283 error = bus_dmamap_load(sc->sc_dmat, 1284 siop_cmd->dmamap_data, xs->data, xs->datalen, 1285 NULL, BUS_DMA_NOWAIT | BUS_DMA_STREAMING); 1286 if (error) { 1287 printf("%s: unable to load cmd DMA map: %d", 1288 sc->sc_dev.dv_xname, error); 1289 xs->error = XS_DRIVER_STUFFUP; 1290 scsipi_done(xs); 1291 bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd); 1292 splx(s); 1293 return; 1294 } 1295 bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, 0, 1296 siop_cmd->dmamap_data->dm_mapsize, 1297 (xs->xs_control & XS_CTL_DATA_IN) ? 1298 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 1299 } 1300 bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_cmd, 0, 1301 siop_cmd->dmamap_cmd->dm_mapsize, BUS_DMASYNC_PREWRITE); 1302 1303 siop_setuptables(siop_cmd); 1304 siop_start(sc, siop_cmd); 1305 if (xs->xs_control & XS_CTL_POLL) { 1306 /* poll for command completion */ 1307 while ((xs->xs_status & XS_STS_DONE) == 0) { 1308 delay(1000); 1309 siop_intr(sc); 1310 } 1311 } 1312 splx(s); 1313 return; 1314 1315 case ADAPTER_REQ_GROW_RESOURCES: 1316 /* XXX Not supported. */ 1317 return; 1318 1319 case ADAPTER_REQ_SET_XFER_MODE: 1320 { 1321 struct scsipi_xfer_mode *xm = arg; 1322 if (sc->targets[xm->xm_target] == NULL) 1323 return; 1324 s = splbio(); 1325 if (xm->xm_mode & PERIPH_CAP_TQING) 1326 sc->targets[xm->xm_target]->flags |= TARF_TAG; 1327 if ((xm->xm_mode & PERIPH_CAP_WIDE16) && 1328 (sc->features & SF_BUS_WIDE)) 1329 sc->targets[xm->xm_target]->flags |= TARF_WIDE; 1330 if (xm->xm_mode & PERIPH_CAP_SYNC) 1331 sc->targets[xm->xm_target]->flags |= TARF_SYNC; 1332 if ((xm->xm_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_WIDE16)) || 1333 sc->targets[xm->xm_target]->status == TARST_PROBING) 1334 sc->targets[xm->xm_target]->status = 1335 TARST_ASYNC; 1336 1337 for (lun = 0; lun < sc->sc_chan.chan_nluns; lun++) { 1338 if (sc->sc_chan.chan_periphs[xm->xm_target][lun]) 1339 /* allocate a lun sw entry for this device */ 1340 siop_add_dev(sc, xm->xm_target, lun); 1341 } 1342 1343 splx(s); 1344 } 1345 } 1346 } 1347 1348 static void 1349 siop_start(sc, siop_cmd) 1350 struct siop_softc *sc; 1351 struct siop_cmd *siop_cmd; 1352 { 1353 struct siop_lun *siop_lun; 1354 u_int32_t dsa; 1355 int timeout; 1356 int target, lun, slot; 1357 1358 /* 1359 * first make sure to read valid data 1360 */ 1361 siop_script_sync(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1362 1363 /* 1364 * The queue management here is a bit tricky: the script always looks 1365 * at the slot from first to last, so if we always use the first 1366 * free slot commands can stay at the tail of the queue ~forever. 1367 * The algorithm used here is to restart from the head when we know 1368 * that the queue is empty, and only add commands after the last one. 1369 * When we're at the end of the queue wait for the script to clear it. 1370 * The best thing to do here would be to implement a circular queue, 1371 * but using only 53c720 features this can be "interesting". 1372 * A mid-way solution could be to implement 2 queues and swap orders. 1373 */ 1374 slot = sc->sc_currschedslot; 1375 /* 1376 * If the instruction is 0x80000000 (JUMP foo, IF FALSE) the slot is 1377 * free. As this is the last used slot, all previous slots are free, 1378 * we can restart from 0. 1379 */ 1380 if (siop_script_read(sc, (Ent_script_sched_slot0 / 4) + slot * 2) == 1381 0x80000000) { 1382 slot = sc->sc_currschedslot = 0; 1383 } else { 1384 slot++; 1385 } 1386 target = siop_cmd->xs->xs_periph->periph_target; 1387 lun = siop_cmd->xs->xs_periph->periph_lun; 1388 siop_lun = sc->targets[target]->siop_lun[lun]; 1389 /* if non-tagged command active, panic: this shouldn't happen */ 1390 if (siop_lun->siop_tag[0].active != NULL) { 1391 panic("siop_start: tagged cmd while untagged running"); 1392 } 1393 #ifdef DIAGNOSTIC 1394 /* sanity check the tag if needed */ 1395 if (siop_cmd->flags & CMDFL_TAG) { 1396 if (siop_lun->siop_tag[siop_cmd->tag].active != NULL) 1397 panic("siop_start: tag not free"); 1398 if (siop_cmd->tag >= SIOP_NTAG) { 1399 scsipi_printaddr(siop_cmd->xs->xs_periph); 1400 printf(": tag id %d\n", siop_cmd->tag); 1401 panic("siop_start: invalid tag id"); 1402 } 1403 } 1404 #endif 1405 /* 1406 * find a free scheduler slot and load it. 1407 */ 1408 for (; slot < SIOP_NSLOTS; slot++) { 1409 /* 1410 * If cmd if 0x80000000 the slot is free 1411 */ 1412 if (siop_script_read(sc, 1413 (Ent_script_sched_slot0 / 4) + slot * 2) == 1414 0x80000000) 1415 break; 1416 } 1417 if (slot == SIOP_NSLOTS) { 1418 /* 1419 * no more free slot, no need to continue. freeze the queue 1420 * and requeue this command. 1421 */ 1422 scsipi_channel_freeze(&sc->sc_chan, 1); 1423 sc->sc_flags |= SCF_CHAN_NOSLOT; 1424 siop_cmd->xs->error = XS_REQUEUE; 1425 siop_cmd->xs->status = SCSI_SIOP_NOCHECK; 1426 siop_scsicmd_end(siop_cmd); 1427 return; 1428 } 1429 #ifdef SIOP_DEBUG_SCHED 1430 printf("using slot %d for DSA 0x%lx\n", slot, 1431 (u_long)siop_cmd->dsa); 1432 #endif 1433 /* mark command as active */ 1434 if (siop_cmd->status == CMDST_READY) 1435 siop_cmd->status = CMDST_ACTIVE; 1436 else 1437 panic("siop_start: bad status"); 1438 siop_lun->siop_tag[siop_cmd->tag].active = siop_cmd; 1439 /* patch scripts with DSA addr */ 1440 dsa = siop_cmd->dsa; 1441 /* first reselect switch, if we have an entry */ 1442 if (siop_lun->siop_tag[siop_cmd->tag].reseloff > 0) 1443 siop_script_write(sc, 1444 siop_lun->siop_tag[siop_cmd->tag].reseloff + 1, 1445 dsa + sizeof(struct siop_xfer_common) + 1446 Ent_ldsa_reload_dsa); 1447 /* CMD script: MOVE MEMORY addr */ 1448 siop_cmd->siop_xfer->resel[E_ldsa_abs_slot_Used[0]] = 1449 htole32(sc->sc_scriptaddr + Ent_script_sched_slot0 + slot * 8); 1450 siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE); 1451 /* scheduler slot: JUMP ldsa_select */ 1452 siop_script_write(sc, 1453 (Ent_script_sched_slot0 / 4) + slot * 2 + 1, 1454 dsa + sizeof(struct siop_xfer_common) + Ent_ldsa_select); 1455 /* handle timeout */ 1456 if ((siop_cmd->xs->xs_control & XS_CTL_POLL) == 0) { 1457 /* start exire timer */ 1458 timeout = 1459 (u_int64_t)siop_cmd->xs->timeout * (u_int64_t)hz / 1000; 1460 if (timeout == 0) 1461 timeout = 1; 1462 callout_reset( &siop_cmd->xs->xs_callout, 1463 timeout, siop_timeout, siop_cmd); 1464 } 1465 /* 1466 * Change JUMP cmd so that this slot will be handled 1467 */ 1468 siop_script_write(sc, (Ent_script_sched_slot0 / 4) + slot * 2, 1469 0x80080000); 1470 sc->sc_currschedslot = slot; 1471 1472 /* make sure SCRIPT processor will read valid data */ 1473 siop_script_sync(sc,BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1474 /* Signal script it has some work to do */ 1475 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT, ISTAT_SIGP); 1476 /* and wait for IRQ */ 1477 return; 1478 } 1479 1480 void 1481 siop_timeout(v) 1482 void *v; 1483 { 1484 struct siop_cmd *siop_cmd = v; 1485 struct siop_softc *sc = siop_cmd->siop_sc; 1486 int s; 1487 1488 scsipi_printaddr(siop_cmd->xs->xs_periph); 1489 printf("command timeout\n"); 1490 1491 s = splbio(); 1492 /* reset the scsi bus */ 1493 siop_resetbus(sc); 1494 1495 /* deactivate callout */ 1496 callout_stop(&siop_cmd->xs->xs_callout); 1497 /* mark command as being timed out; siop_intr will handle it */ 1498 /* 1499 * mark command has being timed out and just return; 1500 * the bus reset will generate an interrupt, 1501 * it will be handled in siop_intr() 1502 */ 1503 siop_cmd->flags |= CMDFL_TIMEOUT; 1504 splx(s); 1505 return; 1506 1507 } 1508 1509 void 1510 siop_dump_script(sc) 1511 struct siop_softc *sc; 1512 { 1513 int i; 1514 for (i = 0; i < PAGE_SIZE / 4; i += 2) { 1515 printf("0x%04x: 0x%08x 0x%08x", i * 4, 1516 le32toh(sc->sc_script[i]), le32toh(sc->sc_script[i+1])); 1517 if ((le32toh(sc->sc_script[i]) & 0xe0000000) == 0xc0000000) { 1518 i++; 1519 printf(" 0x%08x", le32toh(sc->sc_script[i+1])); 1520 } 1521 printf("\n"); 1522 } 1523 } 1524 1525 int 1526 siop_morecbd(sc) 1527 struct siop_softc *sc; 1528 { 1529 int error, i, j; 1530 bus_dma_segment_t seg; 1531 int rseg; 1532 struct siop_cbd *newcbd; 1533 bus_addr_t dsa; 1534 u_int32_t *scr; 1535 1536 /* allocate a new list head */ 1537 newcbd = malloc(sizeof(struct siop_cbd), M_DEVBUF, M_NOWAIT); 1538 if (newcbd == NULL) { 1539 printf("%s: can't allocate memory for command descriptors " 1540 "head\n", sc->sc_dev.dv_xname); 1541 return ENOMEM; 1542 } 1543 memset(newcbd, 0, sizeof(struct siop_cbd)); 1544 1545 /* allocate cmd list */ 1546 newcbd->cmds = 1547 malloc(sizeof(struct siop_cmd) * SIOP_NCMDPB, M_DEVBUF, M_NOWAIT); 1548 if (newcbd->cmds == NULL) { 1549 printf("%s: can't allocate memory for command descriptors\n", 1550 sc->sc_dev.dv_xname); 1551 error = ENOMEM; 1552 goto bad3; 1553 } 1554 memset(newcbd->cmds, 0, sizeof(struct siop_cmd) * SIOP_NCMDPB); 1555 error = bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE, PAGE_SIZE, 0, &seg, 1556 1, &rseg, BUS_DMA_NOWAIT); 1557 if (error) { 1558 printf("%s: unable to allocate cbd DMA memory, error = %d\n", 1559 sc->sc_dev.dv_xname, error); 1560 goto bad2; 1561 } 1562 error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, PAGE_SIZE, 1563 (caddr_t *)&newcbd->xfers, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 1564 if (error) { 1565 printf("%s: unable to map cbd DMA memory, error = %d\n", 1566 sc->sc_dev.dv_xname, error); 1567 goto bad2; 1568 } 1569 error = bus_dmamap_create(sc->sc_dmat, PAGE_SIZE, 1, PAGE_SIZE, 0, 1570 BUS_DMA_NOWAIT, &newcbd->xferdma); 1571 if (error) { 1572 printf("%s: unable to create cbd DMA map, error = %d\n", 1573 sc->sc_dev.dv_xname, error); 1574 goto bad1; 1575 } 1576 error = bus_dmamap_load(sc->sc_dmat, newcbd->xferdma, newcbd->xfers, 1577 PAGE_SIZE, NULL, BUS_DMA_NOWAIT); 1578 if (error) { 1579 printf("%s: unable to load cbd DMA map, error = %d\n", 1580 sc->sc_dev.dv_xname, error); 1581 goto bad0; 1582 } 1583 #ifdef DEBUG 1584 printf("%s: alloc newcdb at PHY addr 0x%lx\n", sc->sc_dev.dv_xname, 1585 (unsigned long)newcbd->xferdma->dm_segs[0].ds_addr); 1586 #endif 1587 1588 for (i = 0; i < SIOP_NCMDPB; i++) { 1589 error = bus_dmamap_create(sc->sc_dmat, MAXPHYS, SIOP_NSG, 1590 MAXPHYS, 0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, 1591 &newcbd->cmds[i].dmamap_data); 1592 if (error) { 1593 printf("%s: unable to create data DMA map for cbd: " 1594 "error %d\n", 1595 sc->sc_dev.dv_xname, error); 1596 goto bad0; 1597 } 1598 error = bus_dmamap_create(sc->sc_dmat, 1599 sizeof(struct scsipi_generic), 1, 1600 sizeof(struct scsipi_generic), 0, 1601 BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, 1602 &newcbd->cmds[i].dmamap_cmd); 1603 if (error) { 1604 printf("%s: unable to create cmd DMA map for cbd %d\n", 1605 sc->sc_dev.dv_xname, error); 1606 goto bad0; 1607 } 1608 newcbd->cmds[i].siop_sc = sc; 1609 newcbd->cmds[i].siop_cbdp = newcbd; 1610 newcbd->cmds[i].siop_xfer = &newcbd->xfers[i]; 1611 memset(newcbd->cmds[i].siop_xfer, 0, 1612 sizeof(struct siop_xfer)); 1613 newcbd->cmds[i].dsa = newcbd->xferdma->dm_segs[0].ds_addr + 1614 i * sizeof(struct siop_xfer); 1615 dsa = newcbd->cmds[i].dsa; 1616 newcbd->cmds[i].status = CMDST_FREE; 1617 newcbd->cmds[i].siop_tables.t_msgout.count= htole32(1); 1618 newcbd->cmds[i].siop_tables.t_msgout.addr = htole32(dsa); 1619 newcbd->cmds[i].siop_tables.t_msgin.count= htole32(1); 1620 newcbd->cmds[i].siop_tables.t_msgin.addr = htole32(dsa + 8); 1621 newcbd->cmds[i].siop_tables.t_extmsgin.count= htole32(2); 1622 newcbd->cmds[i].siop_tables.t_extmsgin.addr = htole32(dsa + 9); 1623 newcbd->cmds[i].siop_tables.t_extmsgdata.addr = 1624 htole32(dsa + 11); 1625 newcbd->cmds[i].siop_tables.t_status.count= htole32(1); 1626 newcbd->cmds[i].siop_tables.t_status.addr = htole32(dsa + 16); 1627 1628 /* The select/reselect script */ 1629 scr = &newcbd->cmds[i].siop_xfer->resel[0]; 1630 for (j = 0; j < sizeof(load_dsa) / sizeof(load_dsa[0]); j++) 1631 scr[j] = htole32(load_dsa[j]); 1632 /* 1633 * 0x78000000 is a 'move data8 to reg'. data8 is the second 1634 * octet, reg offset is the third. 1635 */ 1636 scr[Ent_rdsa0 / 4] = 1637 htole32(0x78100000 | ((dsa & 0x000000ff) << 8)); 1638 scr[Ent_rdsa1 / 4] = 1639 htole32(0x78110000 | ( dsa & 0x0000ff00 )); 1640 scr[Ent_rdsa2 / 4] = 1641 htole32(0x78120000 | ((dsa & 0x00ff0000) >> 8)); 1642 scr[Ent_rdsa3 / 4] = 1643 htole32(0x78130000 | ((dsa & 0xff000000) >> 16)); 1644 scr[E_ldsa_abs_reselected_Used[0]] = 1645 htole32(sc->sc_scriptaddr + Ent_reselected); 1646 scr[E_ldsa_abs_reselect_Used[0]] = 1647 htole32(sc->sc_scriptaddr + Ent_reselect); 1648 scr[E_ldsa_abs_selected_Used[0]] = 1649 htole32(sc->sc_scriptaddr + Ent_selected); 1650 scr[E_ldsa_abs_data_Used[0]] = 1651 htole32(dsa + sizeof(struct siop_xfer_common) + 1652 Ent_ldsa_data); 1653 /* JUMP foo, IF FALSE - used by MOVE MEMORY to clear the slot */ 1654 scr[Ent_ldsa_data / 4] = htole32(0x80000000); 1655 TAILQ_INSERT_TAIL(&sc->free_list, &newcbd->cmds[i], next); 1656 #ifdef SIOP_DEBUG 1657 printf("tables[%d]: in=0x%x out=0x%x status=0x%x\n", i, 1658 le32toh(newcbd->cmds[i].siop_tables.t_msgin.addr), 1659 le32toh(newcbd->cmds[i].siop_tables.t_msgout.addr), 1660 le32toh(newcbd->cmds[i].siop_tables.t_status.addr)); 1661 #endif 1662 } 1663 TAILQ_INSERT_TAIL(&sc->cmds, newcbd, next); 1664 return 0; 1665 bad0: 1666 bus_dmamap_destroy(sc->sc_dmat, newcbd->xferdma); 1667 bad1: 1668 bus_dmamem_free(sc->sc_dmat, &seg, rseg); 1669 bad2: 1670 free(newcbd->cmds, M_DEVBUF); 1671 bad3: 1672 free(newcbd, M_DEVBUF); 1673 return error; 1674 } 1675 1676 struct siop_lunsw * 1677 siop_get_lunsw(sc) 1678 struct siop_softc *sc; 1679 { 1680 struct siop_lunsw *lunsw; 1681 int i; 1682 1683 if (sc->script_free_lo + (sizeof(lun_switch) / sizeof(lun_switch[0])) >= 1684 sc->script_free_hi) 1685 return NULL; 1686 lunsw = TAILQ_FIRST(&sc->lunsw_list); 1687 if (lunsw != NULL) { 1688 #ifdef SIOP_DEBUG 1689 printf("siop_get_lunsw got lunsw at offset %d\n", 1690 lunsw->lunsw_off); 1691 #endif 1692 TAILQ_REMOVE(&sc->lunsw_list, lunsw, next); 1693 return lunsw; 1694 } 1695 lunsw = malloc(sizeof(struct siop_lunsw), M_DEVBUF, M_NOWAIT); 1696 if (lunsw == NULL) 1697 return NULL; 1698 memset(lunsw, 0, sizeof(struct siop_lunsw)); 1699 #ifdef SIOP_DEBUG 1700 printf("allocating lunsw at offset %d\n", sc->script_free_lo); 1701 #endif 1702 if (sc->features & SF_CHIP_RAM) { 1703 bus_space_write_region_4(sc->sc_ramt, sc->sc_ramh, 1704 sc->script_free_lo * 4, lun_switch, 1705 sizeof(lun_switch) / sizeof(lun_switch[0])); 1706 bus_space_write_4(sc->sc_ramt, sc->sc_ramh, 1707 (sc->script_free_lo + E_abs_lunsw_return_Used[0]) * 4, 1708 sc->sc_scriptaddr + Ent_lunsw_return); 1709 } else { 1710 for (i = 0; i < sizeof(lun_switch) / sizeof(lun_switch[0]); 1711 i++) 1712 sc->sc_script[sc->script_free_lo + i] = 1713 htole32(lun_switch[i]); 1714 sc->sc_script[sc->script_free_lo + E_abs_lunsw_return_Used[0]] = 1715 htole32(sc->sc_scriptaddr + Ent_lunsw_return); 1716 } 1717 lunsw->lunsw_off = sc->script_free_lo; 1718 lunsw->lunsw_size = sizeof(lun_switch) / sizeof(lun_switch[0]); 1719 sc->script_free_lo += lunsw->lunsw_size; 1720 siop_script_sync(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1721 return lunsw; 1722 } 1723 1724 void 1725 siop_add_reselsw(sc, target) 1726 struct siop_softc *sc; 1727 int target; 1728 { 1729 int i; 1730 struct siop_lun *siop_lun; 1731 /* 1732 * add an entry to resel switch 1733 */ 1734 siop_script_sync(sc, BUS_DMASYNC_POSTWRITE); 1735 for (i = 0; i < 15; i++) { 1736 sc->targets[target]->reseloff = Ent_resel_targ0 / 4 + i * 2; 1737 if ((siop_script_read(sc, sc->targets[target]->reseloff) & 0xff) 1738 == 0xff) { /* it's free */ 1739 #ifdef SIOP_DEBUG 1740 printf("siop: target %d slot %d offset %d\n", 1741 target, i, sc->targets[target]->reseloff); 1742 #endif 1743 /* JUMP abs_foo, IF target | 0x80; */ 1744 siop_script_write(sc, sc->targets[target]->reseloff, 1745 0x800c0080 | target); 1746 siop_script_write(sc, sc->targets[target]->reseloff + 1, 1747 sc->sc_scriptaddr + 1748 sc->targets[target]->lunsw->lunsw_off * 4 + 1749 Ent_lun_switch_entry); 1750 break; 1751 } 1752 } 1753 if (i == 15) /* no free slot, shouldn't happen */ 1754 panic("siop: resel switch full"); 1755 1756 sc->sc_ntargets++; 1757 for (i = 0; i < 8; i++) { 1758 siop_lun = sc->targets[target]->siop_lun[i]; 1759 if (siop_lun == NULL) 1760 continue; 1761 if (siop_lun->reseloff > 0) { 1762 siop_lun->reseloff = 0; 1763 siop_add_dev(sc, target, i); 1764 } 1765 } 1766 siop_update_scntl3(sc, sc->targets[target]); 1767 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1768 } 1769 1770 void 1771 siop_update_scntl3(sc, siop_target) 1772 struct siop_softc *sc; 1773 struct siop_target *siop_target; 1774 { 1775 /* MOVE target->id >> 24 TO SCNTL3 */ 1776 siop_script_write(sc, 1777 siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4), 1778 0x78030000 | ((siop_target->id >> 16) & 0x0000ff00)); 1779 /* MOVE target->id >> 8 TO SXFER */ 1780 siop_script_write(sc, 1781 siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4) + 2, 1782 0x78050000 | (siop_target->id & 0x0000ff00)); 1783 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1784 } 1785 1786 void 1787 siop_add_dev(sc, target, lun) 1788 struct siop_softc *sc; 1789 int target; 1790 int lun; 1791 { 1792 struct siop_lunsw *lunsw; 1793 struct siop_lun *siop_lun = sc->targets[target]->siop_lun[lun]; 1794 int i, ntargets; 1795 1796 if (siop_lun->reseloff > 0) 1797 return; 1798 lunsw = sc->targets[target]->lunsw; 1799 if ((lunsw->lunsw_off + lunsw->lunsw_size) < sc->script_free_lo) { 1800 /* 1801 * can't extend this slot. Probably not worth trying to deal 1802 * with this case 1803 */ 1804 #ifdef DEBUG 1805 printf("%s:%d:%d: can't allocate a lun sw slot\n", 1806 sc->sc_dev.dv_xname, target, lun); 1807 #endif 1808 return; 1809 } 1810 /* count how many free targets we still have to probe */ 1811 ntargets = sc->sc_chan.chan_ntargets - 1 - sc->sc_ntargets; 1812 1813 /* 1814 * we need 8 bytes for the lun sw additionnal entry, and 1815 * eventually sizeof(tag_switch) for the tag switch entry. 1816 * Keep enouth free space for the free targets that could be 1817 * probed later. 1818 */ 1819 if (sc->script_free_lo + 2 + 1820 (ntargets * sizeof(lun_switch) / sizeof(lun_switch[0])) >= 1821 ((sc->targets[target]->flags & TARF_TAG) ? 1822 sc->script_free_hi - (sizeof(tag_switch) / sizeof(tag_switch[0])) : 1823 sc->script_free_hi)) { 1824 /* 1825 * not enouth space, probably not worth dealing with it. 1826 * We can hold 13 tagged-queuing capable devices in the 4k RAM. 1827 */ 1828 #ifdef DEBUG 1829 printf("%s:%d:%d: not enouth memory for a lun sw slot\n", 1830 sc->sc_dev.dv_xname, target, lun); 1831 #endif 1832 return; 1833 } 1834 #ifdef SIOP_DEBUG 1835 printf("%s:%d:%d: allocate lun sw entry\n", 1836 sc->sc_dev.dv_xname, target, lun); 1837 #endif 1838 /* INT int_resellun */ 1839 siop_script_write(sc, sc->script_free_lo, 0x98080000); 1840 siop_script_write(sc, sc->script_free_lo + 1, A_int_resellun); 1841 /* Now the slot entry: JUMP abs_foo, IF lun */ 1842 siop_script_write(sc, sc->script_free_lo - 2, 1843 0x800c0000 | lun); 1844 siop_script_write(sc, sc->script_free_lo - 1, 0); 1845 siop_lun->reseloff = sc->script_free_lo - 2; 1846 lunsw->lunsw_size += 2; 1847 sc->script_free_lo += 2; 1848 if (sc->targets[target]->flags & TARF_TAG) { 1849 /* we need a tag switch */ 1850 sc->script_free_hi -= 1851 sizeof(tag_switch) / sizeof(tag_switch[0]); 1852 if (sc->features & SF_CHIP_RAM) { 1853 bus_space_write_region_4(sc->sc_ramt, sc->sc_ramh, 1854 sc->script_free_hi * 4, tag_switch, 1855 sizeof(tag_switch) / sizeof(tag_switch[0])); 1856 } else { 1857 for(i = 0; 1858 i < sizeof(tag_switch) / sizeof(tag_switch[0]); 1859 i++) { 1860 sc->sc_script[sc->script_free_hi + i] = 1861 htole32(tag_switch[i]); 1862 } 1863 } 1864 siop_script_write(sc, 1865 siop_lun->reseloff + 1, 1866 sc->sc_scriptaddr + sc->script_free_hi * 4 + 1867 Ent_tag_switch_entry); 1868 1869 for (i = 0; i < SIOP_NTAG; i++) { 1870 siop_lun->siop_tag[i].reseloff = 1871 sc->script_free_hi + (Ent_resel_tag0 / 4) + i * 2; 1872 } 1873 } else { 1874 /* non-tag case; just work with the lun switch */ 1875 siop_lun->siop_tag[0].reseloff = 1876 sc->targets[target]->siop_lun[lun]->reseloff; 1877 } 1878 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1879 } 1880 1881 void 1882 siop_del_dev(sc, target, lun) 1883 struct siop_softc *sc; 1884 int target; 1885 int lun; 1886 { 1887 int i; 1888 #ifdef SIOP_DEBUG 1889 printf("%s:%d:%d: free lun sw entry\n", 1890 sc->sc_dev.dv_xname, target, lun); 1891 #endif 1892 if (sc->targets[target] == NULL) 1893 return; 1894 free(sc->targets[target]->siop_lun[lun], M_DEVBUF); 1895 sc->targets[target]->siop_lun[lun] = NULL; 1896 /* XXX compact sw entry too ? */ 1897 /* check if we can free the whole target */ 1898 for (i = 0; i < 8; i++) { 1899 if (sc->targets[target]->siop_lun[i] != NULL) 1900 return; 1901 } 1902 #ifdef SIOP_DEBUG 1903 printf("%s: free siop_target for target %d lun %d lunsw offset %d\n", 1904 sc->sc_dev.dv_xname, target, lun, 1905 sc->targets[target]->lunsw->lunsw_off); 1906 #endif 1907 /* 1908 * nothing here, free the target struct and resel 1909 * switch entry 1910 */ 1911 siop_script_write(sc, sc->targets[target]->reseloff, 0x800c00ff); 1912 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1913 TAILQ_INSERT_TAIL(&sc->lunsw_list, sc->targets[target]->lunsw, next); 1914 free(sc->targets[target], M_DEVBUF); 1915 sc->targets[target] = NULL; 1916 sc->sc_ntargets--; 1917 } 1918 1919 void 1920 siop_update_xfer_mode(sc, target) 1921 struct siop_softc *sc; 1922 int target; 1923 { 1924 struct siop_target *siop_target = sc->targets[target]; 1925 struct scsipi_xfer_mode xm; 1926 1927 xm.xm_target = target; 1928 xm.xm_mode = 0; 1929 xm.xm_period = 0; 1930 xm.xm_offset = 0; 1931 1932 if (siop_target->flags & TARF_ISWIDE) 1933 xm.xm_mode |= PERIPH_CAP_WIDE16; 1934 if (siop_target->period) { 1935 xm.xm_period = siop_target->period; 1936 xm.xm_offset = siop_target->offset; 1937 xm.xm_mode |= PERIPH_CAP_SYNC; 1938 } 1939 if (siop_target->flags & TARF_TAG) 1940 xm.xm_mode |= PERIPH_CAP_TQING; 1941 scsipi_async_event(&sc->sc_chan, ASYNC_EVENT_XFER_MODE, &xm); 1942 } 1943 1944 #ifdef SIOP_STATS 1945 void 1946 siop_printstats() 1947 { 1948 printf("siop_stat_intr %d\n", siop_stat_intr); 1949 printf("siop_stat_intr_shortxfer %d\n", siop_stat_intr_shortxfer); 1950 printf("siop_stat_intr_xferdisc %d\n", siop_stat_intr_xferdisc); 1951 printf("siop_stat_intr_sdp %d\n", siop_stat_intr_sdp); 1952 printf("siop_stat_intr_done %d\n", siop_stat_intr_done); 1953 printf("siop_stat_intr_lunresel %d\n", siop_stat_intr_lunresel); 1954 printf("siop_stat_intr_qfull %d\n", siop_stat_intr_qfull); 1955 } 1956 #endif 1957
Indexes created Fri Sep 26 20:09:58 GMT 2025