siop.c revision 1.37
1 /* $NetBSD: siop.c,v 1.37 2000/11/14 18:21:02 thorpej 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_start __P((struct siop_softc *)); 85 void siop_timeout __P((void *)); 86 int siop_scsicmd __P((struct scsipi_xfer *)); 87 void siop_dump_script __P((struct siop_softc *)); 88 int siop_morecbd __P((struct siop_softc *)); 89 struct siop_lunsw *siop_get_lunsw __P((struct siop_softc *)); 90 void siop_add_reselsw __P((struct siop_softc *, int)); 91 void siop_update_scntl3 __P((struct siop_softc *, struct siop_target *)); 92 93 struct scsipi_adapter siop_adapter = { 94 0, 95 siop_scsicmd, 96 siop_minphys, 97 siop_ioctl, 98 NULL, 99 NULL, 100 }; 101 102 struct scsipi_device siop_dev = { 103 NULL, 104 NULL, 105 NULL, 106 NULL, 107 }; 108 109 #ifdef SIOP_STATS 110 static int siop_stat_intr = 0; 111 static int siop_stat_intr_shortxfer = 0; 112 static int siop_stat_intr_sdp = 0; 113 static int siop_stat_intr_done = 0; 114 static int siop_stat_intr_xferdisc = 0; 115 static int siop_stat_intr_lunresel = 0; 116 static int siop_stat_intr_qfull = 0; 117 void siop_printstats __P((void)); 118 #define INCSTAT(x) x++ 119 #else 120 #define INCSTAT(x) 121 #endif 122 123 static __inline__ void siop_script_sync __P((struct siop_softc *, int)); 124 static __inline__ void 125 siop_script_sync(sc, ops) 126 struct siop_softc *sc; 127 int ops; 128 { 129 if ((sc->features & SF_CHIP_RAM) == 0) 130 bus_dmamap_sync(sc->sc_dmat, sc->sc_scriptdma, 0, 131 PAGE_SIZE, ops); 132 } 133 134 static __inline__ u_int32_t siop_script_read __P((struct siop_softc *, u_int)); 135 static __inline__ u_int32_t 136 siop_script_read(sc, offset) 137 struct siop_softc *sc; 138 u_int offset; 139 { 140 if (sc->features & SF_CHIP_RAM) { 141 return bus_space_read_4(sc->sc_ramt, sc->sc_ramh, offset * 4); 142 } else { 143 return le32toh(sc->sc_script[offset]); 144 } 145 } 146 147 static __inline__ void siop_script_write __P((struct siop_softc *, u_int, 148 u_int32_t)); 149 static __inline__ void 150 siop_script_write(sc, offset, val) 151 struct siop_softc *sc; 152 u_int offset; 153 u_int32_t val; 154 { 155 if (sc->features & SF_CHIP_RAM) { 156 bus_space_write_4(sc->sc_ramt, sc->sc_ramh, offset * 4, val); 157 } else { 158 sc->sc_script[offset] = htole32(val); 159 } 160 } 161 162 void 163 siop_attach(sc) 164 struct siop_softc *sc; 165 { 166 int error, i; 167 bus_dma_segment_t seg; 168 int rseg; 169 170 /* 171 * Allocate DMA-safe memory for the script and map it. 172 */ 173 if ((sc->features & SF_CHIP_RAM) == 0) { 174 error = bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE, 175 PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT); 176 if (error) { 177 printf("%s: unable to allocate script DMA memory, " 178 "error = %d\n", sc->sc_dev.dv_xname, error); 179 return; 180 } 181 error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, PAGE_SIZE, 182 (caddr_t *)&sc->sc_script, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 183 if (error) { 184 printf("%s: unable to map script DMA memory, " 185 "error = %d\n", sc->sc_dev.dv_xname, error); 186 return; 187 } 188 error = bus_dmamap_create(sc->sc_dmat, PAGE_SIZE, 1, 189 PAGE_SIZE, 0, BUS_DMA_NOWAIT, &sc->sc_scriptdma); 190 if (error) { 191 printf("%s: unable to create script DMA map, " 192 "error = %d\n", sc->sc_dev.dv_xname, error); 193 return; 194 } 195 error = bus_dmamap_load(sc->sc_dmat, sc->sc_scriptdma, 196 sc->sc_script, PAGE_SIZE, NULL, BUS_DMA_NOWAIT); 197 if (error) { 198 printf("%s: unable to load script DMA map, " 199 "error = %d\n", sc->sc_dev.dv_xname, error); 200 return; 201 } 202 sc->sc_scriptaddr = sc->sc_scriptdma->dm_segs[0].ds_addr; 203 sc->ram_size = PAGE_SIZE; 204 } 205 TAILQ_INIT(&sc->free_list); 206 TAILQ_INIT(&sc->ready_list); 207 TAILQ_INIT(&sc->urgent_list); 208 TAILQ_INIT(&sc->cmds); 209 TAILQ_INIT(&sc->lunsw_list); 210 sc->sc_currschedslot = 0; 211 #ifdef SIOP_DEBUG 212 printf("%s: script size = %d, PHY addr=0x%x, VIRT=%p\n", 213 sc->sc_dev.dv_xname, (int)sizeof(siop_script), 214 (u_int32_t)sc->sc_scriptaddr, sc->sc_script); 215 #endif 216 217 sc->sc_link.adapter_softc = sc; 218 sc->sc_link.openings = 2; 219 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 220 sc->sc_link.scsipi_scsi.max_target = 221 (sc->features & SF_BUS_WIDE) ? 15 : 7; 222 sc->sc_link.scsipi_scsi.max_lun = 7; 223 sc->sc_link.scsipi_scsi.adapter_target = bus_space_read_1(sc->sc_rt, 224 sc->sc_rh, SIOP_SCID); 225 if (sc->sc_link.scsipi_scsi.adapter_target == 0 || 226 sc->sc_link.scsipi_scsi.adapter_target > 227 sc->sc_link.scsipi_scsi.max_target) 228 sc->sc_link.scsipi_scsi.adapter_target = SIOP_DEFAULT_TARGET; 229 sc->sc_link.type = BUS_SCSI; 230 sc->sc_link.adapter = &siop_adapter; 231 sc->sc_link.device = &siop_dev; 232 sc->sc_link.flags = 0; 233 234 for (i = 0; i < 16; i++) 235 sc->targets[i] = NULL; 236 237 /* find min/max sync period for this chip */ 238 sc->maxsync = 0; 239 sc->minsync = 255; 240 for (i = 0; i < sizeof(scf_period) / sizeof(scf_period[0]); i++) { 241 if (sc->clock_period != scf_period[i].clock) 242 continue; 243 if (sc->maxsync < scf_period[i].period) 244 sc->maxsync = scf_period[i].period; 245 if (sc->minsync > scf_period[i].period) 246 sc->minsync = scf_period[i].period; 247 } 248 if (sc->maxsync == 255 || sc->minsync == 0) 249 panic("siop: can't find my sync parameters\n"); 250 /* Do a bus reset, so that devices fall back to narrow/async */ 251 siop_resetbus(sc); 252 /* 253 * siop_reset() will reset the chip, thus clearing pending interrupts 254 */ 255 siop_reset(sc); 256 #ifdef DUMP_SCRIPT 257 siop_dump_script(sc); 258 #endif 259 260 config_found((struct device*)sc, &sc->sc_link, scsiprint); 261 } 262 263 void 264 siop_reset(sc) 265 struct siop_softc *sc; 266 { 267 int i, j; 268 struct siop_lunsw *lunsw; 269 270 siop_common_reset(sc); 271 272 /* copy and patch the script */ 273 if (sc->features & SF_CHIP_RAM) { 274 bus_space_write_region_4(sc->sc_ramt, sc->sc_ramh, 0, 275 siop_script, sizeof(siop_script) / sizeof(siop_script[0])); 276 for (j = 0; j < 277 (sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0])); 278 j++) { 279 bus_space_write_4(sc->sc_ramt, sc->sc_ramh, 280 E_abs_msgin_Used[j] * 4, 281 sc->sc_scriptaddr + Ent_msgin_space); 282 } 283 } else { 284 for (j = 0; 285 j < (sizeof(siop_script) / sizeof(siop_script[0])); j++) { 286 sc->sc_script[j] = htole32(siop_script[j]); 287 } 288 for (j = 0; j < 289 (sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0])); 290 j++) { 291 sc->sc_script[E_abs_msgin_Used[j]] = 292 htole32(sc->sc_scriptaddr + Ent_msgin_space); 293 } 294 } 295 sc->script_free_lo = sizeof(siop_script) / sizeof(siop_script[0]); 296 sc->script_free_hi = sc->ram_size / 4; 297 298 /* free used and unused lun switches */ 299 while((lunsw = TAILQ_FIRST(&sc->lunsw_list)) != NULL) { 300 #ifdef SIOP_DEBUG 301 printf("%s: free lunsw at offset %d\n", 302 sc->sc_dev.dv_xname, lunsw->lunsw_off); 303 #endif 304 TAILQ_REMOVE(&sc->lunsw_list, lunsw, next); 305 free(lunsw, M_DEVBUF); 306 } 307 TAILQ_INIT(&sc->lunsw_list); 308 /* restore reselect switch */ 309 for (i = 0; i <= sc->sc_link.scsipi_scsi.max_target; i++) { 310 if (sc->targets[i] == NULL) 311 continue; 312 #ifdef SIOP_DEBUG 313 printf("%s: restore sw for target %d\n", 314 sc->sc_dev.dv_xname, i); 315 #endif 316 free(sc->targets[i]->lunsw, M_DEVBUF); 317 sc->targets[i]->lunsw = siop_get_lunsw(sc); 318 if (sc->targets[i]->lunsw == NULL) { 319 printf("%s: can't alloc lunsw for target %d\n", 320 sc->sc_dev.dv_xname, i); 321 break; 322 } 323 siop_add_reselsw(sc, i); 324 } 325 326 /* start script */ 327 if ((sc->features & SF_CHIP_RAM) == 0) { 328 bus_dmamap_sync(sc->sc_dmat, sc->sc_scriptdma, 0, PAGE_SIZE, 329 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 330 } 331 bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, 332 sc->sc_scriptaddr + Ent_reselect); 333 } 334 335 #if 0 336 #define CALL_SCRIPT(ent) do {\ 337 printf ("start script DSA 0x%lx DSP 0x%lx\n", \ 338 siop_cmd->dsa, \ 339 sc->sc_scriptaddr + ent); \ 340 bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptaddr + ent); \ 341 } while (0) 342 #else 343 #define CALL_SCRIPT(ent) do {\ 344 bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptaddr + ent); \ 345 } while (0) 346 #endif 347 348 int 349 siop_intr(v) 350 void *v; 351 { 352 struct siop_softc *sc = v; 353 struct siop_target *siop_target; 354 struct siop_cmd *siop_cmd; 355 struct siop_lun *siop_lun; 356 struct scsipi_xfer *xs; 357 int istat, sist, sstat1, dstat; 358 u_int32_t irqcode; 359 int need_reset = 0; 360 int offset, target, lun, tag; 361 bus_addr_t dsa; 362 struct siop_cbd *cbdp; 363 int freetarget = 0; 364 365 istat = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT); 366 if ((istat & (ISTAT_INTF | ISTAT_DIP | ISTAT_SIP)) == 0) 367 return 0; 368 INCSTAT(siop_stat_intr); 369 if (istat & ISTAT_INTF) { 370 printf("INTRF\n"); 371 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT, ISTAT_INTF); 372 } 373 /* use DSA to find the current siop_cmd */ 374 dsa = bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA); 375 for (cbdp = TAILQ_FIRST(&sc->cmds); cbdp != NULL; 376 cbdp = TAILQ_NEXT(cbdp, next)) { 377 if (dsa >= cbdp->xferdma->dm_segs[0].ds_addr && 378 dsa < cbdp->xferdma->dm_segs[0].ds_addr + PAGE_SIZE) { 379 dsa -= cbdp->xferdma->dm_segs[0].ds_addr; 380 siop_cmd = &cbdp->cmds[dsa / sizeof(struct siop_xfer)]; 381 siop_table_sync(siop_cmd, 382 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 383 break; 384 } 385 } 386 if (cbdp == NULL) { 387 siop_cmd = NULL; 388 } 389 if (siop_cmd) { 390 xs = siop_cmd->xs; 391 siop_target = siop_cmd->siop_target; 392 target = siop_cmd->xs->sc_link->scsipi_scsi.target; 393 lun = siop_cmd->xs->sc_link->scsipi_scsi.lun; 394 tag = siop_cmd->tag; 395 siop_lun = siop_target->siop_lun[lun]; 396 #ifdef DIAGNOSTIC 397 if (siop_cmd->status != CMDST_ACTIVE && 398 siop_cmd->status != CMDST_SENSE_ACTIVE) { 399 printf("siop_cmd (lun %d) not active (%d)\n", 400 lun, siop_cmd->status); 401 xs = NULL; 402 siop_target = NULL; 403 target = -1; 404 lun = -1; 405 tag = -1; 406 siop_lun = NULL; 407 siop_cmd = NULL; 408 } else if (siop_lun->siop_tag[tag].active != siop_cmd) { 409 printf("siop_cmd (lun %d tag %d) not in siop_lun " 410 "active (%p != %p)\n", lun, tag, siop_cmd, 411 siop_lun->siop_tag[tag].active); 412 } 413 #endif 414 } else { 415 xs = NULL; 416 siop_target = NULL; 417 target = -1; 418 lun = -1; 419 tag = -1; 420 siop_lun = NULL; 421 } 422 if (istat & ISTAT_DIP) { 423 dstat = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DSTAT); 424 if (dstat & DSTAT_SSI) { 425 printf("single step dsp 0x%08x dsa 0x08%x\n", 426 (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - 427 sc->sc_scriptaddr), 428 bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA)); 429 if ((dstat & ~(DSTAT_DFE | DSTAT_SSI)) == 0 && 430 (istat & ISTAT_SIP) == 0) { 431 bus_space_write_1(sc->sc_rt, sc->sc_rh, 432 SIOP_DCNTL, bus_space_read_1(sc->sc_rt, 433 sc->sc_rh, SIOP_DCNTL) | DCNTL_STD); 434 } 435 return 1; 436 } 437 if (dstat & ~(DSTAT_SIR | DSTAT_DFE | DSTAT_SSI)) { 438 printf("DMA IRQ:"); 439 if (dstat & DSTAT_IID) 440 printf(" Illegal instruction"); 441 if (dstat & DSTAT_ABRT) 442 printf(" abort"); 443 if (dstat & DSTAT_BF) 444 printf(" bus fault"); 445 if (dstat & DSTAT_MDPE) 446 printf(" parity"); 447 if (dstat & DSTAT_DFE) 448 printf(" dma fifo empty"); 449 printf(", DSP=0x%x DSA=0x%x: ", 450 (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - 451 sc->sc_scriptaddr), 452 bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA)); 453 if (siop_cmd) 454 printf("last msg_in=0x%x status=0x%x\n", 455 siop_cmd->siop_tables.msg_in[0], 456 le32toh(siop_cmd->siop_tables.status)); 457 else 458 printf("%s: current DSA invalid\n", 459 sc->sc_dev.dv_xname); 460 need_reset = 1; 461 } 462 } 463 if (istat & ISTAT_SIP) { 464 if (istat & ISTAT_DIP) 465 delay(10); 466 /* 467 * Can't read sist0 & sist1 independantly, or we have to 468 * insert delay 469 */ 470 sist = bus_space_read_2(sc->sc_rt, sc->sc_rh, SIOP_SIST0); 471 sstat1 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1); 472 #ifdef SIOP_DEBUG_INTR 473 printf("scsi interrupt, sist=0x%x sstat1=0x%x " 474 "DSA=0x%x DSP=0x%lx\n", sist, 475 bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1), 476 bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA), 477 (u_long)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - 478 sc->sc_scriptaddr)); 479 #endif 480 if (sist & SIST0_RST) { 481 siop_handle_reset(sc); 482 siop_start(sc); 483 /* no table to flush here */ 484 return 1; 485 } 486 if (sist & SIST0_SGE) { 487 if (siop_cmd) 488 scsi_print_addr(xs->sc_link); 489 else 490 printf("%s:", sc->sc_dev.dv_xname); 491 printf("scsi gross error\n"); 492 goto reset; 493 } 494 if ((sist & SIST0_MA) && need_reset == 0) { 495 if (siop_cmd) { 496 int scratcha0; 497 dstat = bus_space_read_1(sc->sc_rt, sc->sc_rh, 498 SIOP_DSTAT); 499 /* 500 * first restore DSA, in case we were in a S/G 501 * operation. 502 */ 503 bus_space_write_4(sc->sc_rt, sc->sc_rh, 504 SIOP_DSA, siop_cmd->dsa); 505 scratcha0 = bus_space_read_1(sc->sc_rt, 506 sc->sc_rh, SIOP_SCRATCHA); 507 switch (sstat1 & SSTAT1_PHASE_MASK) { 508 case SSTAT1_PHASE_STATUS: 509 /* 510 * previous phase may be aborted for any reason 511 * ( for example, the target has less data to 512 * transfer than requested). Just go to status 513 * and the command should terminate. 514 */ 515 INCSTAT(siop_stat_intr_shortxfer); 516 if ((dstat & DSTAT_DFE) == 0) 517 siop_clearfifo(sc); 518 /* no table to flush here */ 519 CALL_SCRIPT(Ent_status); 520 return 1; 521 case SSTAT1_PHASE_MSGIN: 522 /* 523 * target may be ready to disconnect 524 * Save data pointers just in case. 525 */ 526 INCSTAT(siop_stat_intr_xferdisc); 527 if (scratcha0 & A_flag_data) 528 siop_sdp(siop_cmd); 529 else if ((dstat & DSTAT_DFE) == 0) 530 siop_clearfifo(sc); 531 bus_space_write_1(sc->sc_rt, sc->sc_rh, 532 SIOP_SCRATCHA, 533 scratcha0 & ~A_flag_data); 534 siop_table_sync(siop_cmd, 535 BUS_DMASYNC_PREREAD | 536 BUS_DMASYNC_PREWRITE); 537 CALL_SCRIPT(Ent_msgin); 538 return 1; 539 } 540 printf("%s: unexpected phase mismatch %d\n", 541 sc->sc_dev.dv_xname, 542 sstat1 & SSTAT1_PHASE_MASK); 543 } else { 544 printf("%s: phase mismatch without command\n", 545 sc->sc_dev.dv_xname); 546 } 547 need_reset = 1; 548 } 549 if (sist & SIST0_PAR) { 550 /* parity error, reset */ 551 if (siop_cmd) 552 scsi_print_addr(xs->sc_link); 553 else 554 printf("%s:", sc->sc_dev.dv_xname); 555 printf("parity error\n"); 556 goto reset; 557 } 558 if ((sist & (SIST1_STO << 8)) && need_reset == 0) { 559 /* selection time out, assume there's no device here */ 560 if (siop_cmd) { 561 siop_cmd->status = CMDST_DONE; 562 xs->error = XS_SELTIMEOUT; 563 freetarget = 1; 564 goto end; 565 } else { 566 printf("%s: selection timeout without " 567 "command\n", sc->sc_dev.dv_xname); 568 need_reset = 1; 569 } 570 } 571 if (sist & SIST0_UDC) { 572 /* 573 * unexpected disconnect. Usually the target signals 574 * a fatal condition this way. Attempt to get sense. 575 */ 576 if (siop_cmd) { 577 siop_cmd->siop_tables.status = 578 htole32(SCSI_CHECK); 579 goto end; 580 } 581 printf("%s: unexpected disconnect without " 582 "command\n", sc->sc_dev.dv_xname); 583 goto reset; 584 } 585 if (sist & (SIST1_SBMC << 8)) { 586 /* SCSI bus mode change */ 587 if (siop_modechange(sc) == 0 || need_reset == 1) 588 goto reset; 589 if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { 590 /* 591 * we have a script interrupt, it will 592 * restart the script. 593 */ 594 goto scintr; 595 } 596 /* 597 * else we have to restart it ourselve, at the 598 * interrupted instruction. 599 */ 600 bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, 601 bus_space_read_4(sc->sc_rt, sc->sc_rh, 602 SIOP_DSP) - 8); 603 return 1; 604 } 605 /* Else it's an unhandled exeption (for now). */ 606 printf("%s: unhandled scsi interrupt, sist=0x%x sstat1=0x%x " 607 "DSA=0x%x DSP=0x%x\n", sc->sc_dev.dv_xname, sist, 608 bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1), 609 bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA), 610 (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - 611 sc->sc_scriptaddr)); 612 if (siop_cmd) { 613 siop_cmd->status = CMDST_DONE; 614 xs->error = XS_SELTIMEOUT; 615 goto end; 616 } 617 need_reset = 1; 618 } 619 if (need_reset) { 620 reset: 621 /* fatal error, reset the bus */ 622 siop_resetbus(sc); 623 /* no table to flush here */ 624 return 1; 625 } 626 627 scintr: 628 if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { /* script interrupt */ 629 irqcode = bus_space_read_4(sc->sc_rt, sc->sc_rh, 630 SIOP_DSPS); 631 #ifdef SIOP_DEBUG_INTR 632 printf("script interrupt 0x%x\n", irqcode); 633 #endif 634 /* 635 * no command, or an inactive command is only valid for a 636 * reselect interrupt 637 */ 638 if ((irqcode & 0x80) == 0) { 639 if (siop_cmd == NULL) { 640 printf("%s: script interrupt (0x%x) with 641 invalid DSA !!!\n", sc->sc_dev.dv_xname, 642 irqcode); 643 goto reset; 644 } 645 if (siop_cmd->status != CMDST_ACTIVE && 646 siop_cmd->status != CMDST_SENSE_ACTIVE) { 647 printf("%s: command with invalid status " 648 "(IRQ code 0x%x current status %d) !\n", 649 sc->sc_dev.dv_xname, 650 irqcode, siop_cmd->status); 651 xs = NULL; 652 } 653 } 654 switch(irqcode) { 655 case A_int_err: 656 printf("error, DSP=0x%x\n", 657 (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, 658 SIOP_DSP) - sc->sc_scriptaddr)); 659 if (xs) { 660 xs->error = XS_SELTIMEOUT; 661 goto end; 662 } else { 663 goto reset; 664 } 665 case A_int_reseltarg: 666 printf("%s: reselect with invalid target\n", 667 sc->sc_dev.dv_xname); 668 goto reset; 669 case A_int_resellun: 670 INCSTAT(siop_stat_intr_lunresel); 671 target = bus_space_read_1(sc->sc_rt, sc->sc_rh, 672 SIOP_SCRATCHA) & 0xf; 673 lun = bus_space_read_1(sc->sc_rt, sc->sc_rh, 674 SIOP_SCRATCHA + 1); 675 tag = bus_space_read_1(sc->sc_rt, sc->sc_rh, 676 SIOP_SCRATCHA + 2); 677 siop_target = sc->targets[target]; 678 if (siop_target == NULL) { 679 printf("%s: reselect with invalid " 680 "target %d\n", sc->sc_dev.dv_xname, target); 681 goto reset; 682 } 683 siop_lun = siop_target->siop_lun[lun]; 684 if (siop_lun == NULL) { 685 printf("%s: target %d reselect with invalid " 686 "lun %d\n", sc->sc_dev.dv_xname, 687 target, lun); 688 goto reset; 689 } 690 if (siop_lun->siop_tag[tag].active == NULL) { 691 printf("%s: target %d lun %d tag %d reselect " 692 "without command\n", sc->sc_dev.dv_xname, 693 target, lun, tag); 694 goto reset; 695 } 696 siop_cmd = siop_lun->siop_tag[tag].active; 697 bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, 698 siop_cmd->dsa + sizeof(struct siop_xfer_common) + 699 Ent_ldsa_reload_dsa); 700 return 1; 701 case A_int_reseltag: 702 printf("%s: reselect with invalid tag\n", 703 sc->sc_dev.dv_xname); 704 goto reset; 705 case A_int_msgin: 706 { 707 int msgin = bus_space_read_1(sc->sc_rt, sc->sc_rh, 708 SIOP_SFBR); 709 if (msgin == MSG_MESSAGE_REJECT) { 710 int msg, extmsg; 711 if (siop_cmd->siop_tables.msg_out[0] & 0x80) { 712 /* 713 * message was part of a identify + 714 * something else. Identify shoudl't 715 * have been rejected. 716 */ 717 msg = siop_cmd->siop_tables.msg_out[1]; 718 extmsg = 719 siop_cmd->siop_tables.msg_out[3]; 720 } else { 721 msg = siop_cmd->siop_tables.msg_out[0]; 722 extmsg = 723 siop_cmd->siop_tables.msg_out[2]; 724 } 725 if (msg == MSG_MESSAGE_REJECT) { 726 /* MSG_REJECT for a MSG_REJECT !*/ 727 if (xs) 728 scsi_print_addr(xs->sc_link); 729 else 730 printf("%s: ", 731 sc->sc_dev.dv_xname); 732 printf("our reject message was " 733 "rejected\n"); 734 goto reset; 735 } 736 if (msg == MSG_EXTENDED && 737 extmsg == MSG_EXT_WDTR) { 738 /* WDTR rejected, initiate sync */ 739 printf("%s: target %d using 8bit " 740 "transfers\n", sc->sc_dev.dv_xname, 741 target); 742 if ((siop_target->flags & TARF_SYNC) 743 == 0) { 744 siop_target->status = TARST_OK; 745 /* no table to flush here */ 746 CALL_SCRIPT(Ent_msgin_ack); 747 return 1; 748 } 749 siop_target->status = TARST_SYNC_NEG; 750 siop_sdtr_msg(siop_cmd, 0, 751 sc->minsync, sc->maxoff); 752 siop_table_sync(siop_cmd, 753 BUS_DMASYNC_PREREAD | 754 BUS_DMASYNC_PREWRITE); 755 CALL_SCRIPT(Ent_send_msgout); 756 return 1; 757 } else if (msg == MSG_EXTENDED && 758 extmsg == MSG_EXT_SDTR) { 759 /* sync rejected */ 760 printf("%s: target %d asynchronous\n", 761 sc->sc_dev.dv_xname, 762 target); 763 siop_target->status = TARST_OK; 764 /* no table to flush here */ 765 CALL_SCRIPT(Ent_msgin_ack); 766 return 1; 767 } else if (msg == MSG_SIMPLE_Q_TAG || 768 msg == MSG_HEAD_OF_Q_TAG || 769 msg == MSG_ORDERED_Q_TAG) { 770 if (siop_handle_qtag_reject( 771 siop_cmd) == -1) 772 goto reset; 773 CALL_SCRIPT(Ent_msgin_ack); 774 return 1; 775 } 776 if (xs) 777 scsi_print_addr(xs->sc_link); 778 else 779 printf("%s: ", sc->sc_dev.dv_xname); 780 if (msg == MSG_EXTENDED) { 781 printf("scsi message reject, extended " 782 "message sent was 0x%x\n", extmsg); 783 } else { 784 printf("scsi message reject, message " 785 "sent was 0x%x\n", msg); 786 } 787 /* no table to flush here */ 788 CALL_SCRIPT(Ent_msgin_ack); 789 return 1; 790 } 791 if (xs) 792 scsi_print_addr(xs->sc_link); 793 else 794 printf("%s: ", sc->sc_dev.dv_xname); 795 printf("unhandled message 0x%x\n", 796 siop_cmd->siop_tables.msg_in[0]); 797 siop_cmd->siop_tables.msg_out[0] = MSG_MESSAGE_REJECT; 798 siop_cmd->siop_tables.t_msgout.count= htole32(1); 799 siop_table_sync(siop_cmd, 800 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 801 CALL_SCRIPT(Ent_send_msgout); 802 return 1; 803 } 804 case A_int_extmsgin: 805 #ifdef SIOP_DEBUG_INTR 806 printf("extended message: msg 0x%x len %d\n", 807 siop_cmd->siop_tables.msg_in[2], 808 siop_cmd->siop_tables.msg_in[1]); 809 #endif 810 if (siop_cmd->siop_tables.msg_in[1] > 6) 811 printf("%s: extended message too big (%d)\n", 812 sc->sc_dev.dv_xname, 813 siop_cmd->siop_tables.msg_in[1]); 814 siop_cmd->siop_tables.t_extmsgdata.count = 815 htole32(siop_cmd->siop_tables.msg_in[1] - 1); 816 siop_table_sync(siop_cmd, 817 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 818 CALL_SCRIPT(Ent_get_extmsgdata); 819 return 1; 820 case A_int_extmsgdata: 821 #ifdef SIOP_DEBUG_INTR 822 { 823 int i; 824 printf("extended message: 0x%x, data:", 825 siop_cmd->siop_tables.msg_in[2]); 826 for (i = 3; i < 2 + siop_cmd->siop_tables.msg_in[1]; 827 i++) 828 printf(" 0x%x", 829 siop_cmd->siop_tables.msg_in[i]); 830 printf("\n"); 831 } 832 #endif 833 if (siop_cmd->siop_tables.msg_in[2] == MSG_EXT_WDTR) { 834 switch (siop_wdtr_neg(siop_cmd)) { 835 case SIOP_NEG_MSGOUT: 836 siop_update_scntl3(sc, 837 siop_cmd->siop_target); 838 siop_table_sync(siop_cmd, 839 BUS_DMASYNC_PREREAD | 840 BUS_DMASYNC_PREWRITE); 841 CALL_SCRIPT(Ent_send_msgout); 842 return(1); 843 case SIOP_NEG_ACK: 844 siop_update_scntl3(sc, 845 siop_cmd->siop_target); 846 CALL_SCRIPT(Ent_msgin_ack); 847 return(1); 848 default: 849 panic("invalid retval from " 850 "siop_wdtr_neg()"); 851 } 852 return(1); 853 } 854 if (siop_cmd->siop_tables.msg_in[2] == MSG_EXT_SDTR) { 855 switch (siop_sdtr_neg(siop_cmd)) { 856 case SIOP_NEG_MSGOUT: 857 siop_update_scntl3(sc, 858 siop_cmd->siop_target); 859 siop_table_sync(siop_cmd, 860 BUS_DMASYNC_PREREAD | 861 BUS_DMASYNC_PREWRITE); 862 CALL_SCRIPT(Ent_send_msgout); 863 return(1); 864 case SIOP_NEG_ACK: 865 siop_update_scntl3(sc, 866 siop_cmd->siop_target); 867 CALL_SCRIPT(Ent_msgin_ack); 868 return(1); 869 default: 870 panic("invalid retval from " 871 "siop_wdtr_neg()"); 872 } 873 return(1); 874 } 875 /* send a message reject */ 876 siop_cmd->siop_tables.msg_out[0] = MSG_MESSAGE_REJECT; 877 siop_cmd->siop_tables.t_msgout.count = htole32(1); 878 siop_table_sync(siop_cmd, 879 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 880 CALL_SCRIPT(Ent_send_msgout); 881 return 1; 882 case A_int_disc: 883 INCSTAT(siop_stat_intr_sdp); 884 offset = bus_space_read_1(sc->sc_rt, sc->sc_rh, 885 SIOP_SCRATCHA + 1); 886 #ifdef SIOP_DEBUG_DR 887 printf("disconnect offset %d\n", offset); 888 #endif 889 if (offset > SIOP_NSG) { 890 printf("%s: bad offset for disconnect (%d)\n", 891 sc->sc_dev.dv_xname, offset); 892 goto reset; 893 } 894 /* 895 * offset == SIOP_NSG may be a valid condition if 896 * we get a sdp when the xfer is done. 897 * Don't call memmove in this case. 898 */ 899 if (offset < SIOP_NSG) { 900 memmove(&siop_cmd->siop_tables.data[0], 901 &siop_cmd->siop_tables.data[offset], 902 (SIOP_NSG - offset) * sizeof(scr_table_t)); 903 siop_table_sync(siop_cmd, 904 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 905 } 906 CALL_SCRIPT(Ent_script_sched); 907 /* check if we can put some command in scheduler */ 908 siop_start(sc); 909 return 1; 910 case A_int_resfail: 911 printf("reselect failed\n"); 912 CALL_SCRIPT(Ent_script_sched); 913 return 1; 914 case A_int_done: 915 if (xs == NULL) { 916 printf("%s: done without command, DSA=0x%lx\n", 917 sc->sc_dev.dv_xname, (u_long)siop_cmd->dsa); 918 siop_cmd->status = CMDST_FREE; 919 siop_start(sc); 920 CALL_SCRIPT(Ent_script_sched); 921 return 1; 922 } 923 #ifdef SIOP_DEBUG_INTR 924 printf("done, DSA=0x%lx target id 0x%x last msg " 925 "in=0x%x status=0x%x\n", (u_long)siop_cmd->dsa, 926 le32toh(siop_cmd->siop_tables.id), 927 siop_cmd->siop_tables.msg_in[0], 928 le32toh(siop_cmd->siop_tables.status)); 929 #endif 930 INCSTAT(siop_stat_intr_done); 931 if (siop_cmd->status == CMDST_SENSE_ACTIVE) 932 siop_cmd->status = CMDST_SENSE_DONE; 933 else 934 siop_cmd->status = CMDST_DONE; 935 goto end; 936 default: 937 printf("unknown irqcode %x\n", irqcode); 938 if (xs) { 939 xs->error = XS_SELTIMEOUT; 940 goto end; 941 } 942 goto reset; 943 } 944 return 1; 945 } 946 /* We just should't get there */ 947 panic("siop_intr: I shouldn't be there !"); 948 return 1; 949 end: 950 CALL_SCRIPT(Ent_script_sched); 951 siop_scsicmd_end(siop_cmd); 952 siop_lun->siop_tag[tag].active = NULL; 953 if (siop_cmd->status == CMDST_FREE) { 954 TAILQ_INSERT_TAIL(&sc->free_list, siop_cmd, next); 955 siop_lun->lun_flags &= ~SIOP_LUNF_FULL; 956 if (freetarget && siop_target->status == TARST_PROBING) 957 siop_del_dev(sc, target, lun); 958 } 959 siop_start(sc); 960 return 1; 961 } 962 963 void 964 siop_scsicmd_end(siop_cmd) 965 struct siop_cmd *siop_cmd; 966 { 967 struct scsipi_xfer *xs = siop_cmd->xs; 968 struct siop_softc *sc = siop_cmd->siop_sc; 969 970 switch(le32toh(siop_cmd->siop_tables.status)) { 971 case SCSI_OK: 972 xs->error = (siop_cmd->status == CMDST_DONE) ? 973 XS_NOERROR : XS_SENSE; 974 break; 975 case SCSI_BUSY: 976 xs->error = XS_BUSY; 977 break; 978 case SCSI_CHECK: 979 if (siop_cmd->status == CMDST_SENSE_DONE) { 980 /* request sense on a request sense ? */ 981 printf("request sense failed\n"); 982 xs->error = XS_DRIVER_STUFFUP; 983 } else { 984 siop_cmd->status = CMDST_SENSE; 985 } 986 break; 987 case SCSI_QUEUE_FULL: 988 { 989 struct siop_lun *siop_lun = siop_cmd->siop_target->siop_lun[ 990 xs->sc_link->scsipi_scsi.lun]; 991 /* 992 * device didn't queue the command. We have to 993 * retry it. 994 * We insert it in the urgent list, hoping to preserve order. 995 * But unfortunably, commands already in the scheduler may 996 * be accepted before this one. 997 * Also remember the condition, to avoid starting new commands 998 * for this device before one is done. 999 */ 1000 INCSTAT(siop_stat_intr_qfull); 1001 #ifdef SIOP_DEBUG 1002 printf("%s:%d:%d: queue full (tag %d)\n", sc->sc_dev.dv_xname, 1003 xs->sc_link->scsipi_scsi.target, 1004 xs->sc_link->scsipi_scsi.lun, siop_cmd->tag); 1005 #endif 1006 callout_stop(&xs->xs_callout); 1007 siop_lun->lun_flags |= SIOP_LUNF_FULL; 1008 siop_cmd->status = CMDST_READY; 1009 siop_setuptables(siop_cmd); 1010 TAILQ_INSERT_TAIL(&sc->urgent_list, siop_cmd, next); 1011 return; 1012 } 1013 case SCSI_SIOP_NOCHECK: 1014 /* 1015 * don't check status, xs->error is already valid 1016 */ 1017 break; 1018 case SCSI_SIOP_NOSTATUS: 1019 /* 1020 * the status byte was not updated, cmd was 1021 * aborted 1022 */ 1023 xs->error = XS_SELTIMEOUT; 1024 break; 1025 default: 1026 xs->error = XS_DRIVER_STUFFUP; 1027 } 1028 if (siop_cmd->status != CMDST_SENSE_DONE && 1029 xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) { 1030 bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, 0, 1031 siop_cmd->dmamap_data->dm_mapsize, 1032 (xs->xs_control & XS_CTL_DATA_IN) ? 1033 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 1034 bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_data); 1035 } 1036 bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd); 1037 if (siop_cmd->status == CMDST_SENSE) { 1038 /* issue a request sense for this target */ 1039 int error; 1040 siop_cmd->rs_cmd.opcode = REQUEST_SENSE; 1041 siop_cmd->rs_cmd.byte2 = xs->sc_link->scsipi_scsi.lun << 5; 1042 siop_cmd->rs_cmd.unused[0] = siop_cmd->rs_cmd.unused[1] = 0; 1043 siop_cmd->rs_cmd.length = sizeof(struct scsipi_sense_data); 1044 siop_cmd->rs_cmd.control = 0; 1045 siop_cmd->flags &= ~CMDFL_TAG; 1046 error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_cmd, 1047 &siop_cmd->rs_cmd, sizeof(struct scsipi_sense), 1048 NULL, BUS_DMA_NOWAIT); 1049 if (error) { 1050 printf("%s: unable to load cmd DMA map: %d", 1051 sc->sc_dev.dv_xname, error); 1052 xs->error = XS_DRIVER_STUFFUP; 1053 goto out; 1054 } 1055 error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_data, 1056 &xs->sense.scsi_sense, sizeof(struct scsipi_sense_data), 1057 NULL, BUS_DMA_NOWAIT); 1058 if (error) { 1059 printf("%s: unable to load sense DMA map: %d", 1060 sc->sc_dev.dv_xname, error); 1061 xs->error = XS_DRIVER_STUFFUP; 1062 bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd); 1063 goto out; 1064 } 1065 bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, 0, 1066 siop_cmd->dmamap_data->dm_mapsize, BUS_DMASYNC_PREREAD); 1067 bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_cmd, 0, 1068 siop_cmd->dmamap_cmd->dm_mapsize, BUS_DMASYNC_PREWRITE); 1069 1070 siop_setuptables(siop_cmd); 1071 /* arrange for the cmd to be handled now */ 1072 TAILQ_INSERT_HEAD(&sc->urgent_list, siop_cmd, next); 1073 return; 1074 } else if (siop_cmd->status == CMDST_SENSE_DONE) { 1075 bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, 0, 1076 siop_cmd->dmamap_data->dm_mapsize, BUS_DMASYNC_POSTREAD); 1077 bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_data); 1078 } 1079 out: 1080 callout_stop(&siop_cmd->xs->xs_callout); 1081 siop_cmd->status = CMDST_FREE; 1082 xs->xs_status |= XS_STS_DONE; 1083 xs->resid = 0; 1084 if ((xs->xs_control & XS_CTL_POLL) == 0) 1085 scsipi_done (xs); 1086 } 1087 1088 /* 1089 * handle a rejected queue tag message: the command will run untagged, 1090 * has to adjust the reselect script. 1091 */ 1092 int 1093 siop_handle_qtag_reject(siop_cmd) 1094 struct siop_cmd *siop_cmd; 1095 { 1096 struct siop_softc *sc = siop_cmd->siop_sc; 1097 int target = siop_cmd->xs->sc_link->scsipi_scsi.target; 1098 int lun = siop_cmd->xs->sc_link->scsipi_scsi.lun; 1099 int tag = siop_cmd->siop_tables.msg_out[2]; 1100 struct siop_lun *siop_lun = sc->targets[target]->siop_lun[lun]; 1101 1102 #ifdef SIOP_DEBUG 1103 printf("%s:%d:%d: tag message %d (%d) rejected (status %d)\n", 1104 sc->sc_dev.dv_xname, target, lun, tag, siop_cmd->tag, 1105 siop_cmd->status); 1106 #endif 1107 1108 if (siop_lun->siop_tag[0].active != NULL) { 1109 printf("%s: untagged command already running for target %d " 1110 "lun %d (status %d)\n", sc->sc_dev.dv_xname, target, lun, 1111 siop_lun->siop_tag[0].active->status); 1112 return -1; 1113 } 1114 /* clear tag slot */ 1115 siop_lun->siop_tag[tag].active = NULL; 1116 /* add command to non-tagged slot */ 1117 siop_lun->siop_tag[0].active = siop_cmd; 1118 siop_cmd->tag = 0; 1119 /* adjust reselect script if there is one */ 1120 if (siop_lun->siop_tag[0].reseloff > 0) { 1121 siop_script_write(sc, 1122 siop_lun->siop_tag[0].reseloff + 1, 1123 siop_cmd->dsa + sizeof(struct siop_xfer_common) + 1124 Ent_ldsa_reload_dsa); 1125 } 1126 return 0; 1127 } 1128 1129 /* 1130 * handle a bus reset: reset chip, unqueue all active commands, free all 1131 * target struct and report loosage to upper layer. 1132 * As the upper layer may requeue immediatly we have to first store 1133 * all active commands in a temporary queue. 1134 */ 1135 void 1136 siop_handle_reset(sc) 1137 struct siop_softc *sc; 1138 { 1139 struct cmd_list reset_list; 1140 struct siop_cmd *siop_cmd, *next_siop_cmd; 1141 struct siop_lun *siop_lun; 1142 int target, lun, tag; 1143 /* 1144 * scsi bus reset. reset the chip and restart 1145 * the queue. Need to clean up all active commands 1146 */ 1147 printf("%s: scsi bus reset\n", sc->sc_dev.dv_xname); 1148 /* stop, reset and restart the chip */ 1149 siop_reset(sc); 1150 TAILQ_INIT(&reset_list); 1151 /* 1152 * Process all commands: first commmands being executed 1153 */ 1154 for (target = 0; target <= sc->sc_link.scsipi_scsi.max_target; 1155 target++) { 1156 if (sc->targets[target] == NULL) 1157 continue; 1158 for (lun = 0; lun < 8; lun++) { 1159 siop_lun = sc->targets[target]->siop_lun[lun]; 1160 if (siop_lun == NULL) 1161 continue; 1162 siop_lun->lun_flags &= ~SIOP_LUNF_FULL; 1163 for (tag = 0; tag < 1164 ((sc->targets[target]->flags & TARF_TAG) ? 1165 SIOP_NTAG : 1); 1166 tag++) { 1167 siop_cmd = siop_lun->siop_tag[tag].active; 1168 if (siop_cmd == NULL) 1169 continue; 1170 printf("cmd %p (target %d:%d) in reset list\n", 1171 siop_cmd, target, lun); 1172 TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next); 1173 siop_lun->siop_tag[tag].active = NULL; 1174 } 1175 } 1176 sc->targets[target]->status = TARST_ASYNC; 1177 sc->targets[target]->flags &= ~TARF_ISWIDE; 1178 } 1179 /* Next commands from the urgent list */ 1180 for (siop_cmd = TAILQ_FIRST(&sc->urgent_list); siop_cmd != NULL; 1181 siop_cmd = next_siop_cmd) { 1182 next_siop_cmd = TAILQ_NEXT(siop_cmd, next); 1183 siop_cmd->flags &= ~CMDFL_TAG; 1184 printf("cmd %p (target %d:%d) in reset list (wait)\n", 1185 siop_cmd, siop_cmd->xs->sc_link->scsipi_scsi.target, 1186 siop_cmd->xs->sc_link->scsipi_scsi.lun); 1187 TAILQ_REMOVE(&sc->urgent_list, siop_cmd, next); 1188 TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next); 1189 } 1190 /* Then command waiting in the input list */ 1191 for (siop_cmd = TAILQ_FIRST(&sc->ready_list); siop_cmd != NULL; 1192 siop_cmd = next_siop_cmd) { 1193 next_siop_cmd = TAILQ_NEXT(siop_cmd, next); 1194 siop_cmd->flags &= ~CMDFL_TAG; 1195 printf("cmd %p (target %d:%d) in reset list (wait)\n", 1196 siop_cmd, siop_cmd->xs->sc_link->scsipi_scsi.target, 1197 siop_cmd->xs->sc_link->scsipi_scsi.lun); 1198 TAILQ_REMOVE(&sc->ready_list, siop_cmd, next); 1199 TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next); 1200 } 1201 1202 for (siop_cmd = TAILQ_FIRST(&reset_list); siop_cmd != NULL; 1203 siop_cmd = next_siop_cmd) { 1204 next_siop_cmd = TAILQ_NEXT(siop_cmd, next); 1205 siop_cmd->xs->error = (siop_cmd->flags & CMDFL_TIMEOUT) ? 1206 XS_TIMEOUT : XS_RESET; 1207 siop_cmd->siop_tables.status = htole32(SCSI_SIOP_NOCHECK); 1208 printf("cmd %p (status %d) about to be processed\n", siop_cmd, 1209 siop_cmd->status); 1210 if (siop_cmd->status == CMDST_SENSE || 1211 siop_cmd->status == CMDST_SENSE_ACTIVE) 1212 siop_cmd->status = CMDST_SENSE_DONE; 1213 else 1214 siop_cmd->status = CMDST_DONE; 1215 TAILQ_REMOVE(&reset_list, siop_cmd, next); 1216 siop_scsicmd_end(siop_cmd); 1217 TAILQ_INSERT_TAIL(&sc->free_list, siop_cmd, next); 1218 } 1219 } 1220 1221 int 1222 siop_scsicmd(xs) 1223 struct scsipi_xfer *xs; 1224 { 1225 struct siop_softc *sc = (struct siop_softc *)xs->sc_link->adapter_softc; 1226 struct siop_cmd *siop_cmd; 1227 int s, error, i; 1228 const int target = xs->sc_link->scsipi_scsi.target; 1229 const int lun = xs->sc_link->scsipi_scsi.lun; 1230 1231 s = splbio(); 1232 #ifdef SIOP_DEBUG_SCHED 1233 printf("starting cmd for %d:%d\n", target, lun); 1234 #endif 1235 siop_cmd = TAILQ_FIRST(&sc->free_list); 1236 if (siop_cmd) { 1237 TAILQ_REMOVE(&sc->free_list, siop_cmd, next); 1238 } else { 1239 if (siop_morecbd(sc) == 0) { 1240 siop_cmd = TAILQ_FIRST(&sc->free_list); 1241 #ifdef DIAGNOSTIC 1242 if (siop_cmd == NULL) 1243 panic("siop_morecbd succeed and does nothing"); 1244 #endif 1245 TAILQ_REMOVE(&sc->free_list, siop_cmd, next); 1246 } 1247 } 1248 if (siop_cmd == NULL) { 1249 xs->error = XS_DRIVER_STUFFUP; 1250 splx(s); 1251 return(TRY_AGAIN_LATER); 1252 } 1253 #ifdef DIAGNOSTIC 1254 if (siop_cmd->status != CMDST_FREE) 1255 panic("siop_scsicmd: new cmd not free"); 1256 #endif 1257 if (sc->targets[target] == NULL) { 1258 #ifdef SIOP_DEBUG 1259 printf("%s: alloc siop_target for target %d\n", 1260 sc->sc_dev.dv_xname, target); 1261 #endif 1262 sc->targets[target] = 1263 malloc(sizeof(struct siop_target), M_DEVBUF, M_NOWAIT); 1264 if (sc->targets[target] == NULL) { 1265 printf("%s: can't malloc memory for target %d\n", 1266 sc->sc_dev.dv_xname, target); 1267 xs->error = XS_DRIVER_STUFFUP; 1268 splx(s); 1269 return(TRY_AGAIN_LATER); 1270 } 1271 sc->targets[target]->status = TARST_PROBING; 1272 sc->targets[target]->flags = 0; 1273 sc->targets[target]->id = sc->clock_div << 24; /* scntl3 */ 1274 sc->targets[target]->id |= target << 16; /* id */ 1275 /* sc->targets[target]->id |= 0x0 << 8; scxfer is 0 */ 1276 1277 /* get a lun switch script */ 1278 sc->targets[target]->lunsw = siop_get_lunsw(sc); 1279 if (sc->targets[target]->lunsw == NULL) { 1280 printf("%s: can't alloc lunsw for target %d\n", 1281 sc->sc_dev.dv_xname, target); 1282 xs->error = XS_DRIVER_STUFFUP; 1283 splx(s); 1284 return(TRY_AGAIN_LATER); 1285 } 1286 for (i=0; i < 8; i++) 1287 sc->targets[target]->siop_lun[i] = NULL; 1288 siop_add_reselsw(sc, target); 1289 } 1290 if (sc->targets[target]->siop_lun[lun] == NULL) { 1291 sc->targets[target]->siop_lun[lun] = 1292 malloc(sizeof(struct siop_lun), M_DEVBUF, M_NOWAIT); 1293 if (sc->targets[target]->siop_lun[lun] == NULL) { 1294 printf("%s: can't alloc siop_lun for target %d " 1295 "lun %d\n", sc->sc_dev.dv_xname, target, lun); 1296 xs->error = XS_DRIVER_STUFFUP; 1297 splx(s); 1298 return(TRY_AGAIN_LATER); 1299 } 1300 memset(sc->targets[target]->siop_lun[lun], 0, 1301 sizeof(struct siop_lun)); 1302 } 1303 siop_cmd->siop_target = sc->targets[target]; 1304 siop_cmd->xs = xs; 1305 siop_cmd->flags = 0; 1306 siop_cmd->status = CMDST_READY; 1307 1308 /* load the DMA maps */ 1309 error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_cmd, 1310 xs->cmd, xs->cmdlen, NULL, BUS_DMA_NOWAIT); 1311 if (error) { 1312 printf("%s: unable to load cmd DMA map: %d", 1313 sc->sc_dev.dv_xname, error); 1314 xs->error = XS_DRIVER_STUFFUP; 1315 splx(s); 1316 return(TRY_AGAIN_LATER); 1317 } 1318 if (xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) { 1319 error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_data, 1320 xs->data, xs->datalen, NULL, BUS_DMA_NOWAIT); 1321 if (error) { 1322 printf("%s: unable to load cmd DMA map: %d", 1323 sc->sc_dev.dv_xname, error); 1324 xs->error = XS_DRIVER_STUFFUP; 1325 bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd); 1326 splx(s); 1327 return(TRY_AGAIN_LATER); 1328 } 1329 bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, 0, 1330 siop_cmd->dmamap_data->dm_mapsize, 1331 (xs->xs_control & XS_CTL_DATA_IN) ? 1332 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 1333 } 1334 bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_cmd, 0, 1335 siop_cmd->dmamap_cmd->dm_mapsize, BUS_DMASYNC_PREWRITE); 1336 1337 siop_setuptables(siop_cmd); 1338 1339 TAILQ_INSERT_TAIL(&sc->ready_list, siop_cmd, next); 1340 siop_start(sc); 1341 if (xs->xs_control & XS_CTL_POLL) { 1342 /* poll for command completion */ 1343 while ((xs->xs_status & XS_STS_DONE) == 0) { 1344 delay(1000); 1345 siop_intr(sc); 1346 } 1347 splx(s); 1348 return (COMPLETE); 1349 } 1350 splx(s); 1351 return (SUCCESSFULLY_QUEUED); 1352 } 1353 1354 void 1355 siop_start(sc) 1356 struct siop_softc *sc; 1357 { 1358 struct siop_cmd *siop_cmd, *next_siop_cmd; 1359 struct siop_lun *siop_lun; 1360 u_int32_t dsa; 1361 int timeout; 1362 int target, lun, tag, slot; 1363 int newcmd = 0; 1364 int doingready = 0; 1365 1366 /* 1367 * first make sure to read valid data 1368 */ 1369 siop_script_sync(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1370 1371 /* 1372 * The queue management here is a bit tricky: the script always looks 1373 * at the slot from first to last, so if we always use the first 1374 * free slot commands can stay at the tail of the queue ~forever. 1375 * The algorithm used here is to restart from the head when we know 1376 * that the queue is empty, and only add commands after the last one. 1377 * When we're at the end of the queue wait for the script to clear it. 1378 * The best thing to do here would be to implement a circular queue, 1379 * but using only 53c720 features this can be "interesting". 1380 * A mid-way solution could be to implement 2 queues and swap orders. 1381 */ 1382 slot = sc->sc_currschedslot; 1383 /* 1384 * If the instruction is 0x80000000 (JUMP foo, IF FALSE) the slot is 1385 * free. As this is the last used slot, all previous slots are free, 1386 * we can restart from 0. 1387 */ 1388 if (siop_script_read(sc, (Ent_script_sched_slot0 / 4) + slot * 2) == 1389 0x80000000) { 1390 slot = sc->sc_currschedslot = 0; 1391 } else { 1392 slot++; 1393 } 1394 /* first handle commands from the urgent list */ 1395 siop_cmd = TAILQ_FIRST(&sc->urgent_list); 1396 again: 1397 for (; siop_cmd != NULL; siop_cmd = next_siop_cmd) { 1398 next_siop_cmd = TAILQ_NEXT(siop_cmd, next); 1399 #ifdef DIAGNOSTIC 1400 if (siop_cmd->status != CMDST_READY && 1401 siop_cmd->status != CMDST_SENSE) 1402 panic("siop: non-ready cmd in ready list"); 1403 #endif 1404 target = siop_cmd->xs->sc_link->scsipi_scsi.target; 1405 lun = siop_cmd->xs->sc_link->scsipi_scsi.lun; 1406 siop_lun = sc->targets[target]->siop_lun[lun]; 1407 /* if non-tagged command active, wait */ 1408 if (siop_lun->siop_tag[0].active != NULL) 1409 continue; 1410 /* 1411 * if we're in a queue full condition don't start a new 1412 * command, unless it's a request sense 1413 */ 1414 if ((siop_lun->lun_flags & SIOP_LUNF_FULL) && 1415 siop_cmd->status == CMDST_READY) 1416 continue; 1417 /* find a free tag if needed */ 1418 if (siop_cmd->flags & CMDFL_TAG) { 1419 for (tag = 1; tag < SIOP_NTAG; tag++) { 1420 if (siop_lun->siop_tag[tag].active == NULL) 1421 break; 1422 } 1423 if (tag == SIOP_NTAG) /* no free tag */ 1424 continue; 1425 } else { 1426 tag = 0; 1427 } 1428 siop_cmd->tag = tag; 1429 /* find a free scheduler slot and load it */ 1430 for (; slot < SIOP_NSLOTS; slot++) { 1431 /* 1432 * If cmd if 0x80000000 the slot is free 1433 */ 1434 if (siop_script_read(sc, 1435 (Ent_script_sched_slot0 / 4) + slot * 2) == 1436 0x80000000) 1437 break; 1438 } 1439 /* no more free slot, no need to continue */ 1440 if (slot == SIOP_NSLOTS) { 1441 goto end; 1442 } 1443 #ifdef SIOP_DEBUG_SCHED 1444 printf("using slot %d for DSA 0x%lx\n", slot, 1445 (u_long)siop_cmd->dsa); 1446 #endif 1447 /* Ok, we can add the tag message */ 1448 if (tag > 0) { 1449 #ifdef DIAGNOSTIC 1450 int msgcount = 1451 le32toh(siop_cmd->siop_tables.t_msgout.count); 1452 if (msgcount != 1) 1453 printf("%s:%d:%d: tag %d with msgcount %d\n", 1454 sc->sc_dev.dv_xname, target, lun, tag, 1455 msgcount); 1456 #endif 1457 if (siop_cmd->xs->bp != NULL && 1458 (siop_cmd->xs->bp->b_flags & B_ASYNC)) 1459 siop_cmd->siop_tables.msg_out[1] = 1460 MSG_SIMPLE_Q_TAG; 1461 else 1462 siop_cmd->siop_tables.msg_out[1] = 1463 MSG_ORDERED_Q_TAG; 1464 siop_cmd->siop_tables.msg_out[2] = tag; 1465 siop_cmd->siop_tables.t_msgout.count = htole32(3); 1466 } 1467 /* note that we started a new command */ 1468 newcmd = 1; 1469 /* mark command as active */ 1470 if (siop_cmd->status == CMDST_READY) { 1471 siop_cmd->status = CMDST_ACTIVE; 1472 } else if (siop_cmd->status == CMDST_SENSE) { 1473 siop_cmd->status = CMDST_SENSE_ACTIVE; 1474 } else 1475 panic("siop_start: bad status"); 1476 if (doingready) 1477 TAILQ_REMOVE(&sc->ready_list, siop_cmd, next); 1478 else 1479 TAILQ_REMOVE(&sc->urgent_list, siop_cmd, next); 1480 siop_lun->siop_tag[tag].active = siop_cmd; 1481 /* patch scripts with DSA addr */ 1482 dsa = siop_cmd->dsa; 1483 /* first reselect switch, if we have an entry */ 1484 if (siop_lun->siop_tag[tag].reseloff > 0) 1485 siop_script_write(sc, 1486 siop_lun->siop_tag[tag].reseloff + 1, 1487 dsa + sizeof(struct siop_xfer_common) + 1488 Ent_ldsa_reload_dsa); 1489 /* CMD script: MOVE MEMORY addr */ 1490 siop_cmd->siop_xfer->resel[E_ldsa_abs_slot_Used[0]] = 1491 htole32(sc->sc_scriptaddr + Ent_script_sched_slot0 + 1492 slot * 8); 1493 /* scheduler slot: JUMP ldsa_select */ 1494 siop_script_write(sc, 1495 (Ent_script_sched_slot0 / 4) + slot * 2 + 1, 1496 dsa + sizeof(struct siop_xfer_common) + Ent_ldsa_select); 1497 /* handle timeout */ 1498 if (siop_cmd->status == CMDST_ACTIVE) { 1499 if ((siop_cmd->xs->xs_control & 1500 XS_CTL_POLL) == 0) { 1501 /* start exire timer */ 1502 timeout = (u_int64_t) siop_cmd->xs->timeout * 1503 (u_int64_t)hz / 1000; 1504 if (timeout == 0) 1505 timeout = 1; 1506 callout_reset( &siop_cmd->xs->xs_callout, 1507 timeout, siop_timeout, siop_cmd); 1508 } 1509 } 1510 /* 1511 * Change JUMP cmd so that this slot will be handled 1512 */ 1513 siop_script_write(sc, (Ent_script_sched_slot0 / 4) + slot * 2, 1514 0x80080000); 1515 sc->sc_currschedslot = slot; 1516 slot++; 1517 } 1518 if (doingready == 0) { 1519 /* now process ready list */ 1520 doingready = 1; 1521 siop_cmd = TAILQ_FIRST(&sc->ready_list); 1522 goto again; 1523 } 1524 1525 end: 1526 /* if nothing changed no need to flush cache and wakeup script */ 1527 if (newcmd == 0) 1528 return; 1529 /* make sure SCRIPT processor will read valid data */ 1530 siop_script_sync(sc,BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1531 /* Signal script it has some work to do */ 1532 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT, ISTAT_SIGP); 1533 /* and wait for IRQ */ 1534 return; 1535 } 1536 1537 void 1538 siop_timeout(v) 1539 void *v; 1540 { 1541 struct siop_cmd *siop_cmd = v; 1542 struct siop_softc *sc = siop_cmd->siop_sc; 1543 int s; 1544 1545 scsi_print_addr(siop_cmd->xs->sc_link); 1546 printf("command timeout\n"); 1547 1548 s = splbio(); 1549 /* reset the scsi bus */ 1550 siop_resetbus(sc); 1551 1552 /* deactivate callout */ 1553 callout_stop(&siop_cmd->xs->xs_callout); 1554 /* mark command as being timed out; siop_intr will handle it */ 1555 /* 1556 * mark command has being timed out and just return; 1557 * the bus reset will generate an interrupt, 1558 * it will be handled in siop_intr() 1559 */ 1560 siop_cmd->flags |= CMDFL_TIMEOUT; 1561 splx(s); 1562 return; 1563 1564 } 1565 1566 void 1567 siop_dump_script(sc) 1568 struct siop_softc *sc; 1569 { 1570 int i; 1571 for (i = 0; i < PAGE_SIZE / 4; i += 2) { 1572 printf("0x%04x: 0x%08x 0x%08x", i * 4, 1573 le32toh(sc->sc_script[i]), le32toh(sc->sc_script[i+1])); 1574 if ((le32toh(sc->sc_script[i]) & 0xe0000000) == 0xc0000000) { 1575 i++; 1576 printf(" 0x%08x", le32toh(sc->sc_script[i+1])); 1577 } 1578 printf("\n"); 1579 } 1580 } 1581 1582 int 1583 siop_morecbd(sc) 1584 struct siop_softc *sc; 1585 { 1586 int error, i, j; 1587 bus_dma_segment_t seg; 1588 int rseg; 1589 struct siop_cbd *newcbd; 1590 bus_addr_t dsa; 1591 u_int32_t *scr; 1592 1593 /* allocate a new list head */ 1594 newcbd = malloc(sizeof(struct siop_cbd), M_DEVBUF, M_NOWAIT); 1595 if (newcbd == NULL) { 1596 printf("%s: can't allocate memory for command descriptors " 1597 "head\n", sc->sc_dev.dv_xname); 1598 return ENOMEM; 1599 } 1600 memset(newcbd, 0, sizeof(struct siop_cbd)); 1601 1602 /* allocate cmd list */ 1603 newcbd->cmds = 1604 malloc(sizeof(struct siop_cmd) * SIOP_NCMDPB, M_DEVBUF, M_NOWAIT); 1605 if (newcbd->cmds == NULL) { 1606 printf("%s: can't allocate memory for command descriptors\n", 1607 sc->sc_dev.dv_xname); 1608 error = ENOMEM; 1609 goto bad3; 1610 } 1611 memset(newcbd->cmds, 0, sizeof(struct siop_cmd) * SIOP_NCMDPB); 1612 error = bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE, PAGE_SIZE, 0, &seg, 1613 1, &rseg, BUS_DMA_NOWAIT); 1614 if (error) { 1615 printf("%s: unable to allocate cbd DMA memory, error = %d\n", 1616 sc->sc_dev.dv_xname, error); 1617 goto bad2; 1618 } 1619 error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, PAGE_SIZE, 1620 (caddr_t *)&newcbd->xfers, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 1621 if (error) { 1622 printf("%s: unable to map cbd DMA memory, error = %d\n", 1623 sc->sc_dev.dv_xname, error); 1624 goto bad2; 1625 } 1626 error = bus_dmamap_create(sc->sc_dmat, PAGE_SIZE, 1, PAGE_SIZE, 0, 1627 BUS_DMA_NOWAIT, &newcbd->xferdma); 1628 if (error) { 1629 printf("%s: unable to create cbd DMA map, error = %d\n", 1630 sc->sc_dev.dv_xname, error); 1631 goto bad1; 1632 } 1633 error = bus_dmamap_load(sc->sc_dmat, newcbd->xferdma, newcbd->xfers, 1634 PAGE_SIZE, NULL, BUS_DMA_NOWAIT); 1635 if (error) { 1636 printf("%s: unable to load cbd DMA map, error = %d\n", 1637 sc->sc_dev.dv_xname, error); 1638 goto bad0; 1639 } 1640 #ifdef DEBUG 1641 printf("%s: alloc newcdb at PHY addr 0x%lx\n", sc->sc_dev.dv_xname, 1642 (unsigned long)newcbd->xferdma->dm_segs[0].ds_addr); 1643 #endif 1644 1645 for (i = 0; i < SIOP_NCMDPB; i++) { 1646 error = bus_dmamap_create(sc->sc_dmat, MAXPHYS, SIOP_NSG, 1647 MAXPHYS, 0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, 1648 &newcbd->cmds[i].dmamap_data); 1649 if (error) { 1650 printf("%s: unable to create data DMA map for cbd: " 1651 "error %d\n", 1652 sc->sc_dev.dv_xname, error); 1653 goto bad0; 1654 } 1655 error = bus_dmamap_create(sc->sc_dmat, 1656 sizeof(struct scsipi_generic), 1, 1657 sizeof(struct scsipi_generic), 0, 1658 BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, 1659 &newcbd->cmds[i].dmamap_cmd); 1660 if (error) { 1661 printf("%s: unable to create cmd DMA map for cbd %d\n", 1662 sc->sc_dev.dv_xname, error); 1663 goto bad0; 1664 } 1665 newcbd->cmds[i].siop_sc = sc; 1666 newcbd->cmds[i].siop_cbdp = newcbd; 1667 newcbd->cmds[i].siop_xfer = &newcbd->xfers[i]; 1668 memset(newcbd->cmds[i].siop_xfer, 0, 1669 sizeof(struct siop_xfer)); 1670 newcbd->cmds[i].dsa = newcbd->xferdma->dm_segs[0].ds_addr + 1671 i * sizeof(struct siop_xfer); 1672 dsa = newcbd->cmds[i].dsa; 1673 newcbd->cmds[i].status = CMDST_FREE; 1674 newcbd->cmds[i].siop_tables.t_msgout.count= htole32(1); 1675 newcbd->cmds[i].siop_tables.t_msgout.addr = htole32(dsa); 1676 newcbd->cmds[i].siop_tables.t_msgin.count= htole32(1); 1677 newcbd->cmds[i].siop_tables.t_msgin.addr = htole32(dsa + 8); 1678 newcbd->cmds[i].siop_tables.t_extmsgin.count= htole32(2); 1679 newcbd->cmds[i].siop_tables.t_extmsgin.addr = htole32(dsa + 9); 1680 newcbd->cmds[i].siop_tables.t_extmsgdata.addr = 1681 htole32(dsa + 11); 1682 newcbd->cmds[i].siop_tables.t_status.count= htole32(1); 1683 newcbd->cmds[i].siop_tables.t_status.addr = htole32(dsa + 16); 1684 1685 /* The select/reselect script */ 1686 scr = &newcbd->cmds[i].siop_xfer->resel[0]; 1687 for (j = 0; j < sizeof(load_dsa) / sizeof(load_dsa[0]); j++) 1688 scr[j] = htole32(load_dsa[j]); 1689 /* 1690 * 0x78000000 is a 'move data8 to reg'. data8 is the second 1691 * octet, reg offset is the third. 1692 */ 1693 scr[Ent_rdsa0 / 4] = 1694 htole32(0x78100000 | ((dsa & 0x000000ff) << 8)); 1695 scr[Ent_rdsa1 / 4] = 1696 htole32(0x78110000 | ( dsa & 0x0000ff00 )); 1697 scr[Ent_rdsa2 / 4] = 1698 htole32(0x78120000 | ((dsa & 0x00ff0000) >> 8)); 1699 scr[Ent_rdsa3 / 4] = 1700 htole32(0x78130000 | ((dsa & 0xff000000) >> 16)); 1701 scr[E_ldsa_abs_reselected_Used[0]] = 1702 htole32(sc->sc_scriptaddr + Ent_reselected); 1703 scr[E_ldsa_abs_reselect_Used[0]] = 1704 htole32(sc->sc_scriptaddr + Ent_reselect); 1705 scr[E_ldsa_abs_selected_Used[0]] = 1706 htole32(sc->sc_scriptaddr + Ent_selected); 1707 scr[E_ldsa_abs_data_Used[0]] = 1708 htole32(dsa + sizeof(struct siop_xfer_common) + 1709 Ent_ldsa_data); 1710 /* JUMP foo, IF FALSE - used by MOVE MEMORY to clear the slot */ 1711 scr[Ent_ldsa_data / 4] = htole32(0x80000000); 1712 TAILQ_INSERT_TAIL(&sc->free_list, &newcbd->cmds[i], next); 1713 #ifdef SIOP_DEBUG 1714 printf("tables[%d]: in=0x%x out=0x%x status=0x%x\n", i, 1715 le32toh(newcbd->cmds[i].siop_tables.t_msgin.addr), 1716 le32toh(newcbd->cmds[i].siop_tables.t_msgout.addr), 1717 le32toh(newcbd->cmds[i].siop_tables.t_status.addr)); 1718 #endif 1719 } 1720 TAILQ_INSERT_TAIL(&sc->cmds, newcbd, next); 1721 return 0; 1722 bad0: 1723 bus_dmamap_destroy(sc->sc_dmat, newcbd->xferdma); 1724 bad1: 1725 bus_dmamem_free(sc->sc_dmat, &seg, rseg); 1726 bad2: 1727 free(newcbd->cmds, M_DEVBUF); 1728 bad3: 1729 free(newcbd, M_DEVBUF); 1730 return error; 1731 } 1732 1733 struct siop_lunsw * 1734 siop_get_lunsw(sc) 1735 struct siop_softc *sc; 1736 { 1737 struct siop_lunsw *lunsw; 1738 int i; 1739 1740 if (sc->script_free_lo + (sizeof(lun_switch) / sizeof(lun_switch[0])) >= 1741 sc->script_free_hi) 1742 return NULL; 1743 lunsw = TAILQ_FIRST(&sc->lunsw_list); 1744 if (lunsw != NULL) { 1745 #ifdef SIOP_DEBUG 1746 printf("siop_get_lunsw got lunsw at offset %d\n", 1747 lunsw->lunsw_off); 1748 #endif 1749 TAILQ_REMOVE(&sc->lunsw_list, lunsw, next); 1750 return lunsw; 1751 } 1752 lunsw = malloc(sizeof(struct siop_lunsw), M_DEVBUF, M_NOWAIT); 1753 if (lunsw == NULL) 1754 return NULL; 1755 memset(lunsw, 0, sizeof(struct siop_lunsw)); 1756 #ifdef SIOP_DEBUG 1757 printf("allocating lunsw at offset %d\n", sc->script_free_lo); 1758 #endif 1759 if (sc->features & SF_CHIP_RAM) { 1760 bus_space_write_region_4(sc->sc_ramt, sc->sc_ramh, 1761 sc->script_free_lo * 4, lun_switch, 1762 sizeof(lun_switch) / sizeof(lun_switch[0])); 1763 bus_space_write_4(sc->sc_ramt, sc->sc_ramh, 1764 (sc->script_free_lo + E_abs_lunsw_return_Used[0]) * 4, 1765 sc->sc_scriptaddr + Ent_lunsw_return); 1766 } else { 1767 for (i = 0; i < sizeof(lun_switch) / sizeof(lun_switch[0]); 1768 i++) 1769 sc->sc_script[sc->script_free_lo + i] = 1770 htole32(lun_switch[i]); 1771 sc->sc_script[sc->script_free_lo + E_abs_lunsw_return_Used[0]] = 1772 htole32(sc->sc_scriptaddr + Ent_lunsw_return); 1773 } 1774 lunsw->lunsw_off = sc->script_free_lo; 1775 lunsw->lunsw_size = sizeof(lun_switch) / sizeof(lun_switch[0]); 1776 sc->script_free_lo += lunsw->lunsw_size; 1777 if (sc->script_free_lo > 1024) 1778 printf("%s: script_free_lo (%d) > 1024\n", sc->sc_dev.dv_xname, 1779 sc->script_free_lo); 1780 siop_script_sync(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1781 return lunsw; 1782 } 1783 1784 void 1785 siop_add_reselsw(sc, target) 1786 struct siop_softc *sc; 1787 int target; 1788 { 1789 int i; 1790 struct siop_lun *siop_lun; 1791 /* 1792 * add an entry to resel switch 1793 */ 1794 siop_script_sync(sc, BUS_DMASYNC_POSTWRITE); 1795 for (i = 0; i < 15; i++) { 1796 sc->targets[target]->reseloff = Ent_resel_targ0 / 4 + i * 2; 1797 if ((siop_script_read(sc, sc->targets[target]->reseloff) & 0xff) 1798 == 0xff) { /* it's free */ 1799 #ifdef SIOP_DEBUG 1800 printf("siop: target %d slot %d offset %d\n", 1801 target, i, sc->targets[target]->reseloff); 1802 #endif 1803 /* JUMP abs_foo, IF target | 0x80; */ 1804 siop_script_write(sc, sc->targets[target]->reseloff, 1805 0x800c0080 | target); 1806 siop_script_write(sc, sc->targets[target]->reseloff + 1, 1807 sc->sc_scriptaddr + 1808 sc->targets[target]->lunsw->lunsw_off * 4 + 1809 Ent_lun_switch_entry); 1810 break; 1811 } 1812 } 1813 if (i == 15) /* no free slot, shouldn't happen */ 1814 panic("siop: resel switch full"); 1815 1816 sc->sc_ntargets++; 1817 for (i = 0; i < 8; i++) { 1818 siop_lun = sc->targets[target]->siop_lun[i]; 1819 if (siop_lun == NULL) 1820 continue; 1821 if (siop_lun->reseloff > 0) { 1822 siop_lun->reseloff = 0; 1823 siop_add_dev(sc, target, i); 1824 } 1825 } 1826 siop_update_scntl3(sc, sc->targets[target]); 1827 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1828 } 1829 1830 void 1831 siop_update_scntl3(sc, siop_target) 1832 struct siop_softc *sc; 1833 struct siop_target *siop_target; 1834 { 1835 /* MOVE target->id >> 24 TO SCNTL3 */ 1836 siop_script_write(sc, 1837 siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4), 1838 0x78030000 | ((siop_target->id >> 16) & 0x0000ff00)); 1839 /* MOVE target->id >> 8 TO SXFER */ 1840 siop_script_write(sc, 1841 siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4) + 2, 1842 0x78050000 | (siop_target->id & 0x0000ff00)); 1843 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1844 } 1845 1846 void 1847 siop_add_dev(sc, target, lun) 1848 struct siop_softc *sc; 1849 int target; 1850 int lun; 1851 { 1852 struct siop_lunsw *lunsw; 1853 struct siop_lun *siop_lun = sc->targets[target]->siop_lun[lun]; 1854 int i, ntargets; 1855 1856 if (siop_lun->reseloff > 0) 1857 return; 1858 lunsw = sc->targets[target]->lunsw; 1859 if ((lunsw->lunsw_off + lunsw->lunsw_size) < sc->script_free_lo) { 1860 /* 1861 * can't extend this slot. Probably not worth trying to deal 1862 * with this case 1863 */ 1864 #ifdef DEBUG 1865 printf("%s:%d:%d: can't allocate a lun sw slot\n", 1866 sc->sc_dev.dv_xname, target, lun); 1867 #endif 1868 return; 1869 } 1870 /* count how many free targets we still have to probe */ 1871 ntargets = sc->sc_link.scsipi_scsi.max_target - 1 - sc->sc_ntargets; 1872 1873 /* 1874 * we need 8 bytes for the lun sw additionnal entry, and 1875 * eventually sizeof(tag_switch) for the tag switch entry. 1876 * Keep enouth free space for the free targets that could be 1877 * probed later. 1878 */ 1879 if (sc->script_free_lo + 2 + 1880 (ntargets * sizeof(lun_switch) / sizeof(lun_switch[0])) >= 1881 ((sc->targets[target]->flags & TARF_TAG) ? 1882 sc->script_free_hi - (sizeof(tag_switch) / sizeof(tag_switch[0])) : 1883 sc->script_free_hi)) { 1884 /* 1885 * not enouth space, probably not worth dealing with it. 1886 * We can hold 13 tagged-queuing capable devices in the 4k RAM. 1887 */ 1888 #ifdef DEBUG 1889 printf("%s:%d:%d: not enouth memory for a lun sw slot\n", 1890 sc->sc_dev.dv_xname, target, lun); 1891 #endif 1892 return; 1893 } 1894 #ifdef SIOP_DEBUG 1895 printf("%s:%d:%d: allocate lun sw entry\n", 1896 sc->sc_dev.dv_xname, target, lun); 1897 #endif 1898 /* INT int_resellun */ 1899 siop_script_write(sc, sc->script_free_lo, 0x98080000); 1900 siop_script_write(sc, sc->script_free_lo + 1, A_int_resellun); 1901 /* Now the slot entry: JUMP abs_foo, IF lun */ 1902 siop_script_write(sc, sc->script_free_lo - 2, 1903 0x800c0000 | lun); 1904 siop_script_write(sc, sc->script_free_lo - 1, 0); 1905 siop_lun->reseloff = sc->script_free_lo - 2; 1906 lunsw->lunsw_size += 2; 1907 sc->script_free_lo += 2; 1908 if (sc->targets[target]->flags & TARF_TAG) { 1909 /* we need a tag switch */ 1910 sc->script_free_hi -= 1911 sizeof(tag_switch) / sizeof(tag_switch[0]); 1912 if (sc->features & SF_CHIP_RAM) { 1913 bus_space_write_region_4(sc->sc_ramt, sc->sc_ramh, 1914 sc->script_free_hi * 4, tag_switch, 1915 sizeof(tag_switch) / sizeof(tag_switch[0])); 1916 } else { 1917 for(i = 0; 1918 i < sizeof(tag_switch) / sizeof(tag_switch[0]); 1919 i++) { 1920 sc->sc_script[sc->script_free_hi + i] = 1921 htole32(tag_switch[i]); 1922 } 1923 } 1924 siop_script_write(sc, 1925 siop_lun->reseloff + 1, 1926 sc->sc_scriptaddr + sc->script_free_hi * 4 + 1927 Ent_tag_switch_entry); 1928 1929 for (i = 0; i < SIOP_NTAG; i++) { 1930 siop_lun->siop_tag[i].reseloff = 1931 sc->script_free_hi + (Ent_resel_tag0 / 4) + i * 2; 1932 } 1933 } else { 1934 /* non-tag case; just work with the lun switch */ 1935 siop_lun->siop_tag[0].reseloff = 1936 sc->targets[target]->siop_lun[lun]->reseloff; 1937 } 1938 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1939 } 1940 1941 void 1942 siop_del_dev(sc, target, lun) 1943 struct siop_softc *sc; 1944 int target; 1945 int lun; 1946 { 1947 int i; 1948 #ifdef SIOP_DEBUG 1949 printf("%s:%d:%d: free lun sw entry\n", 1950 sc->sc_dev.dv_xname, target, lun); 1951 #endif 1952 if (sc->targets[target] == NULL) 1953 return; 1954 free(sc->targets[target]->siop_lun[lun], M_DEVBUF); 1955 sc->targets[target]->siop_lun[lun] = NULL; 1956 /* XXX compact sw entry too ? */ 1957 /* check if we can free the whole target */ 1958 for (i = 0; i < 8; i++) { 1959 if (sc->targets[target]->siop_lun[i] != NULL) 1960 return; 1961 } 1962 #ifdef SIOP_DEBUG 1963 printf("%s: free siop_target for target %d lun %d lunsw offset %d\n", 1964 sc->sc_dev.dv_xname, target, lun, 1965 sc->targets[target]->lunsw->lunsw_off); 1966 #endif 1967 /* 1968 * nothing here, free the target struct and resel 1969 * switch entry 1970 */ 1971 siop_script_write(sc, sc->targets[target]->reseloff, 0x800c00ff); 1972 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1973 TAILQ_INSERT_TAIL(&sc->lunsw_list, sc->targets[target]->lunsw, next); 1974 free(sc->targets[target], M_DEVBUF); 1975 sc->targets[target] = NULL; 1976 sc->sc_ntargets--; 1977 } 1978 1979 #ifdef SIOP_STATS 1980 void 1981 siop_printstats() 1982 { 1983 printf("siop_stat_intr %d\n", siop_stat_intr); 1984 printf("siop_stat_intr_shortxfer %d\n", siop_stat_intr_shortxfer); 1985 printf("siop_stat_intr_xferdisc %d\n", siop_stat_intr_xferdisc); 1986 printf("siop_stat_intr_sdp %d\n", siop_stat_intr_sdp); 1987 printf("siop_stat_intr_done %d\n", siop_stat_intr_done); 1988 printf("siop_stat_intr_lunresel %d\n", siop_stat_intr_lunresel); 1989 printf("siop_stat_intr_qfull %d\n", siop_stat_intr_qfull); 1990 } 1991 #endif 1992
Indexes created Sun Oct 19 02:09:48 GMT 2025