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sys/dev/ic/siop.c
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1 /* $NetBSD: siop.c,v 1.72 2004/03/16 19:10:43 bouyer 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/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: siop.c,v 1.72 2004/03/16 19:10:43 bouyer Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 #include <sys/malloc.h> 42 #include <sys/buf.h> 43 #include <sys/kernel.h> 44 45 #include <uvm/uvm_extern.h> 46 47 #include <machine/endian.h> 48 #include <machine/bus.h> 49 50 #include <dev/microcode/siop/siop.out> 51 52 #include <dev/scsipi/scsi_all.h> 53 #include <dev/scsipi/scsi_message.h> 54 #include <dev/scsipi/scsipi_all.h> 55 56 #include <dev/scsipi/scsiconf.h> 57 58 #include <dev/ic/siopreg.h> 59 #include <dev/ic/siopvar_common.h> 60 #include <dev/ic/siopvar.h> 61 62 #include "opt_siop.h" 63 64 #ifndef DEBUG 65 #undef DEBUG 66 #endif 67 #undef SIOP_DEBUG 68 #undef SIOP_DEBUG_DR 69 #undef SIOP_DEBUG_INTR 70 #undef SIOP_DEBUG_SCHED 71 #undef DUMP_SCRIPT 72 73 #define SIOP_STATS 74 75 #ifndef SIOP_DEFAULT_TARGET 76 #define SIOP_DEFAULT_TARGET 7 77 #endif 78 79 /* number of cmd descriptors per block */ 80 #define SIOP_NCMDPB (PAGE_SIZE / sizeof(struct siop_xfer)) 81 82 /* Number of scheduler slot (needs to match script) */ 83 #define SIOP_NSLOTS 40 84 85 void siop_reset __P((struct siop_softc *)); 86 void siop_handle_reset __P((struct siop_softc *)); 87 int siop_handle_qtag_reject __P((struct siop_cmd *)); 88 void siop_scsicmd_end __P((struct siop_cmd *)); 89 void siop_unqueue __P((struct siop_softc *, int, int)); 90 static void siop_start __P((struct siop_softc *, struct siop_cmd *)); 91 void siop_timeout __P((void *)); 92 int siop_scsicmd __P((struct scsipi_xfer *)); 93 void siop_scsipi_request __P((struct scsipi_channel *, 94 scsipi_adapter_req_t, void *)); 95 void siop_dump_script __P((struct siop_softc *)); 96 void siop_morecbd __P((struct siop_softc *)); 97 struct siop_lunsw *siop_get_lunsw __P((struct siop_softc *)); 98 void siop_add_reselsw __P((struct siop_softc *, int)); 99 void siop_update_scntl3 __P((struct siop_softc *, 100 struct siop_common_target *)); 101 102 #ifdef SIOP_STATS 103 static int siop_stat_intr = 0; 104 static int siop_stat_intr_shortxfer = 0; 105 static int siop_stat_intr_sdp = 0; 106 static int siop_stat_intr_done = 0; 107 static int siop_stat_intr_xferdisc = 0; 108 static int siop_stat_intr_lunresel = 0; 109 static int siop_stat_intr_qfull = 0; 110 void siop_printstats __P((void)); 111 #define INCSTAT(x) x++ 112 #else 113 #define INCSTAT(x) 114 #endif 115 116 static __inline__ void siop_script_sync __P((struct siop_softc *, int)); 117 static __inline__ void 118 siop_script_sync(sc, ops) 119 struct siop_softc *sc; 120 int ops; 121 { 122 if ((sc->sc_c.features & SF_CHIP_RAM) == 0) 123 bus_dmamap_sync(sc->sc_c.sc_dmat, sc->sc_c.sc_scriptdma, 0, 124 PAGE_SIZE, ops); 125 } 126 127 static __inline__ u_int32_t siop_script_read __P((struct siop_softc *, u_int)); 128 static __inline__ u_int32_t 129 siop_script_read(sc, offset) 130 struct siop_softc *sc; 131 u_int offset; 132 { 133 if (sc->sc_c.features & SF_CHIP_RAM) { 134 return bus_space_read_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh, 135 offset * 4); 136 } else { 137 return le32toh(sc->sc_c.sc_script[offset]); 138 } 139 } 140 141 static __inline__ void siop_script_write __P((struct siop_softc *, u_int, 142 u_int32_t)); 143 static __inline__ void 144 siop_script_write(sc, offset, val) 145 struct siop_softc *sc; 146 u_int offset; 147 u_int32_t val; 148 { 149 if (sc->sc_c.features & SF_CHIP_RAM) { 150 bus_space_write_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh, 151 offset * 4, val); 152 } else { 153 sc->sc_c.sc_script[offset] = htole32(val); 154 } 155 } 156 157 void 158 siop_attach(sc) 159 struct siop_softc *sc; 160 { 161 if (siop_common_attach(&sc->sc_c) != 0) 162 return; 163 164 TAILQ_INIT(&sc->free_list); 165 TAILQ_INIT(&sc->cmds); 166 TAILQ_INIT(&sc->lunsw_list); 167 sc->sc_currschedslot = 0; 168 #ifdef SIOP_DEBUG 169 printf("%s: script size = %d, PHY addr=0x%x, VIRT=%p\n", 170 sc->sc_c.sc_dev.dv_xname, (int)sizeof(siop_script), 171 (u_int32_t)sc->sc_c.sc_scriptaddr, sc->sc_c.sc_script); 172 #endif 173 174 sc->sc_c.sc_adapt.adapt_max_periph = SIOP_NTAG - 1; 175 sc->sc_c.sc_adapt.adapt_request = siop_scsipi_request; 176 177 /* Do a bus reset, so that devices fall back to narrow/async */ 178 siop_resetbus(&sc->sc_c); 179 /* 180 * siop_reset() will reset the chip, thus clearing pending interrupts 181 */ 182 siop_reset(sc); 183 #ifdef DUMP_SCRIPT 184 siop_dump_script(sc); 185 #endif 186 187 config_found((struct device*)sc, &sc->sc_c.sc_chan, scsiprint); 188 } 189 190 void 191 siop_reset(sc) 192 struct siop_softc *sc; 193 { 194 int i, j; 195 struct siop_lunsw *lunsw; 196 197 siop_common_reset(&sc->sc_c); 198 199 /* copy and patch the script */ 200 if (sc->sc_c.features & SF_CHIP_RAM) { 201 bus_space_write_region_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh, 0, 202 siop_script, sizeof(siop_script) / sizeof(siop_script[0])); 203 for (j = 0; j < 204 (sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0])); 205 j++) { 206 bus_space_write_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh, 207 E_abs_msgin_Used[j] * 4, 208 sc->sc_c.sc_scriptaddr + Ent_msgin_space); 209 } 210 if (sc->sc_c.features & SF_CHIP_LED0) { 211 bus_space_write_region_4(sc->sc_c.sc_ramt, 212 sc->sc_c.sc_ramh, 213 Ent_led_on1, siop_led_on, 214 sizeof(siop_led_on) / sizeof(siop_led_on[0])); 215 bus_space_write_region_4(sc->sc_c.sc_ramt, 216 sc->sc_c.sc_ramh, 217 Ent_led_on2, siop_led_on, 218 sizeof(siop_led_on) / sizeof(siop_led_on[0])); 219 bus_space_write_region_4(sc->sc_c.sc_ramt, 220 sc->sc_c.sc_ramh, 221 Ent_led_off, siop_led_off, 222 sizeof(siop_led_off) / sizeof(siop_led_off[0])); 223 } 224 } else { 225 for (j = 0; 226 j < (sizeof(siop_script) / sizeof(siop_script[0])); j++) { 227 sc->sc_c.sc_script[j] = htole32(siop_script[j]); 228 } 229 for (j = 0; j < 230 (sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0])); 231 j++) { 232 sc->sc_c.sc_script[E_abs_msgin_Used[j]] = 233 htole32(sc->sc_c.sc_scriptaddr + Ent_msgin_space); 234 } 235 if (sc->sc_c.features & SF_CHIP_LED0) { 236 for (j = 0; j < (sizeof(siop_led_on) / 237 sizeof(siop_led_on[0])); j++) 238 sc->sc_c.sc_script[ 239 Ent_led_on1 / sizeof(siop_led_on[0]) + j 240 ] = htole32(siop_led_on[j]); 241 for (j = 0; j < (sizeof(siop_led_on) / 242 sizeof(siop_led_on[0])); j++) 243 sc->sc_c.sc_script[ 244 Ent_led_on2 / sizeof(siop_led_on[0]) + j 245 ] = htole32(siop_led_on[j]); 246 for (j = 0; j < (sizeof(siop_led_off) / 247 sizeof(siop_led_off[0])); j++) 248 sc->sc_c.sc_script[ 249 Ent_led_off / sizeof(siop_led_off[0]) + j 250 ] = htole32(siop_led_off[j]); 251 } 252 } 253 sc->script_free_lo = sizeof(siop_script) / sizeof(siop_script[0]); 254 sc->script_free_hi = sc->sc_c.ram_size / 4; 255 sc->sc_ntargets = 0; 256 257 /* free used and unused lun switches */ 258 while((lunsw = TAILQ_FIRST(&sc->lunsw_list)) != NULL) { 259 #ifdef SIOP_DEBUG 260 printf("%s: free lunsw at offset %d\n", 261 sc->sc_c.sc_dev.dv_xname, lunsw->lunsw_off); 262 #endif 263 TAILQ_REMOVE(&sc->lunsw_list, lunsw, next); 264 free(lunsw, M_DEVBUF); 265 } 266 TAILQ_INIT(&sc->lunsw_list); 267 /* restore reselect switch */ 268 for (i = 0; i < sc->sc_c.sc_chan.chan_ntargets; i++) { 269 struct siop_target *target; 270 if (sc->sc_c.targets[i] == NULL) 271 continue; 272 #ifdef SIOP_DEBUG 273 printf("%s: restore sw for target %d\n", 274 sc->sc_c.sc_dev.dv_xname, i); 275 #endif 276 target = (struct siop_target *)sc->sc_c.targets[i]; 277 free(target->lunsw, M_DEVBUF); 278 target->lunsw = siop_get_lunsw(sc); 279 if (target->lunsw == NULL) { 280 printf("%s: can't alloc lunsw for target %d\n", 281 sc->sc_c.sc_dev.dv_xname, i); 282 break; 283 } 284 siop_add_reselsw(sc, i); 285 } 286 287 /* start script */ 288 if ((sc->sc_c.features & SF_CHIP_RAM) == 0) { 289 bus_dmamap_sync(sc->sc_c.sc_dmat, sc->sc_c.sc_scriptdma, 0, 290 PAGE_SIZE, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 291 } 292 bus_space_write_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSP, 293 sc->sc_c.sc_scriptaddr + Ent_reselect); 294 } 295 296 #if 0 297 #define CALL_SCRIPT(ent) do {\ 298 printf ("start script DSA 0x%lx DSP 0x%lx\n", \ 299 siop_cmd->cmd_c.dsa, \ 300 sc->sc_c.sc_scriptaddr + ent); \ 301 bus_space_write_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSP, sc->sc_c.sc_scriptaddr + ent); \ 302 } while (0) 303 #else 304 #define CALL_SCRIPT(ent) do {\ 305 bus_space_write_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSP, sc->sc_c.sc_scriptaddr + ent); \ 306 } while (0) 307 #endif 308 309 int 310 siop_intr(v) 311 void *v; 312 { 313 struct siop_softc *sc = v; 314 struct siop_target *siop_target; 315 struct siop_cmd *siop_cmd; 316 struct siop_lun *siop_lun; 317 struct scsipi_xfer *xs; 318 int istat, sist, sstat1, dstat = 0; /* XXX: gcc */ 319 u_int32_t irqcode; 320 int need_reset = 0; 321 int offset, target, lun, tag; 322 bus_addr_t dsa; 323 struct siop_cbd *cbdp; 324 int freetarget = 0; 325 int restart = 0; 326 327 istat = bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_ISTAT); 328 if ((istat & (ISTAT_INTF | ISTAT_DIP | ISTAT_SIP)) == 0) 329 return 0; 330 INCSTAT(siop_stat_intr); 331 if (istat & ISTAT_INTF) { 332 printf("INTRF\n"); 333 bus_space_write_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 334 SIOP_ISTAT, ISTAT_INTF); 335 } 336 if ((istat &(ISTAT_DIP | ISTAT_SIP | ISTAT_ABRT)) == 337 (ISTAT_DIP | ISTAT_ABRT)) { 338 /* clear abort */ 339 bus_space_write_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 340 SIOP_ISTAT, 0); 341 } 342 /* use DSA to find the current siop_cmd */ 343 siop_cmd = NULL; 344 dsa = bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSA); 345 TAILQ_FOREACH(cbdp, &sc->cmds, next) { 346 if (dsa >= cbdp->xferdma->dm_segs[0].ds_addr && 347 dsa < cbdp->xferdma->dm_segs[0].ds_addr + PAGE_SIZE) { 348 dsa -= cbdp->xferdma->dm_segs[0].ds_addr; 349 siop_cmd = &cbdp->cmds[dsa / sizeof(struct siop_xfer)]; 350 siop_table_sync(siop_cmd, 351 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 352 break; 353 } 354 } 355 if (siop_cmd) { 356 xs = siop_cmd->cmd_c.xs; 357 siop_target = (struct siop_target *)siop_cmd->cmd_c.siop_target; 358 target = siop_cmd->cmd_c.xs->xs_periph->periph_target; 359 lun = siop_cmd->cmd_c.xs->xs_periph->periph_lun; 360 tag = siop_cmd->cmd_c.tag; 361 siop_lun = siop_target->siop_lun[lun]; 362 #ifdef DIAGNOSTIC 363 if (siop_cmd->cmd_c.status != CMDST_ACTIVE) { 364 printf("siop_cmd (lun %d) for DSA 0x%x " 365 "not active (%d)\n", lun, (u_int)dsa, 366 siop_cmd->cmd_c.status); 367 xs = NULL; 368 siop_target = NULL; 369 target = -1; 370 lun = -1; 371 tag = -1; 372 siop_lun = NULL; 373 siop_cmd = NULL; 374 } else if (siop_lun->siop_tag[tag].active != siop_cmd) { 375 printf("siop_cmd (lun %d tag %d) not in siop_lun " 376 "active (%p != %p)\n", lun, tag, siop_cmd, 377 siop_lun->siop_tag[tag].active); 378 } 379 #endif 380 } else { 381 xs = NULL; 382 siop_target = NULL; 383 target = -1; 384 lun = -1; 385 tag = -1; 386 siop_lun = NULL; 387 } 388 if (istat & ISTAT_DIP) { 389 dstat = bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 390 SIOP_DSTAT); 391 if (dstat & DSTAT_ABRT) { 392 /* was probably generated by a bus reset IOCTL */ 393 if ((dstat & DSTAT_DFE) == 0) 394 siop_clearfifo(&sc->sc_c); 395 goto reset; 396 } 397 if (dstat & DSTAT_SSI) { 398 printf("single step dsp 0x%08x dsa 0x08%x\n", 399 (int)(bus_space_read_4(sc->sc_c.sc_rt, 400 sc->sc_c.sc_rh, SIOP_DSP) - 401 sc->sc_c.sc_scriptaddr), 402 bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 403 SIOP_DSA)); 404 if ((dstat & ~(DSTAT_DFE | DSTAT_SSI)) == 0 && 405 (istat & ISTAT_SIP) == 0) { 406 bus_space_write_1(sc->sc_c.sc_rt, 407 sc->sc_c.sc_rh, SIOP_DCNTL, 408 bus_space_read_1(sc->sc_c.sc_rt, 409 sc->sc_c.sc_rh, SIOP_DCNTL) | DCNTL_STD); 410 } 411 return 1; 412 } 413 414 if (dstat & ~(DSTAT_SIR | DSTAT_DFE | DSTAT_SSI)) { 415 printf("DMA IRQ:"); 416 if (dstat & DSTAT_IID) 417 printf(" Illegal instruction"); 418 if (dstat & DSTAT_BF) 419 printf(" bus fault"); 420 if (dstat & DSTAT_MDPE) 421 printf(" parity"); 422 if (dstat & DSTAT_DFE) 423 printf(" DMA fifo empty"); 424 else 425 siop_clearfifo(&sc->sc_c); 426 printf(", DSP=0x%x DSA=0x%x: ", 427 (int)(bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 428 SIOP_DSP) - sc->sc_c.sc_scriptaddr), 429 bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSA)); 430 if (siop_cmd) 431 printf("last msg_in=0x%x status=0x%x\n", 432 siop_cmd->cmd_tables->msg_in[0], 433 le32toh(siop_cmd->cmd_tables->status)); 434 else 435 printf("%s: current DSA invalid\n", 436 sc->sc_c.sc_dev.dv_xname); 437 need_reset = 1; 438 } 439 } 440 if (istat & ISTAT_SIP) { 441 if (istat & ISTAT_DIP) 442 delay(10); 443 /* 444 * Can't read sist0 & sist1 independently, or we have to 445 * insert delay 446 */ 447 sist = bus_space_read_2(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 448 SIOP_SIST0); 449 sstat1 = bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 450 SIOP_SSTAT1); 451 #ifdef SIOP_DEBUG_INTR 452 printf("scsi interrupt, sist=0x%x sstat1=0x%x " 453 "DSA=0x%x DSP=0x%lx\n", sist, 454 bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 455 SIOP_SSTAT1), 456 bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSA), 457 (u_long)(bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 458 SIOP_DSP) - 459 sc->sc_c.sc_scriptaddr)); 460 #endif 461 if (sist & SIST0_RST) { 462 siop_handle_reset(sc); 463 /* no table to flush here */ 464 return 1; 465 } 466 if (sist & SIST0_SGE) { 467 if (siop_cmd) 468 scsipi_printaddr(xs->xs_periph); 469 else 470 printf("%s:", sc->sc_c.sc_dev.dv_xname); 471 printf("scsi gross error\n"); 472 goto reset; 473 } 474 if ((sist & SIST0_MA) && need_reset == 0) { 475 if (siop_cmd) { 476 int scratcha0; 477 dstat = bus_space_read_1(sc->sc_c.sc_rt, 478 sc->sc_c.sc_rh, SIOP_DSTAT); 479 /* 480 * first restore DSA, in case we were in a S/G 481 * operation. 482 */ 483 bus_space_write_4(sc->sc_c.sc_rt, 484 sc->sc_c.sc_rh, 485 SIOP_DSA, siop_cmd->cmd_c.dsa); 486 scratcha0 = bus_space_read_1(sc->sc_c.sc_rt, 487 sc->sc_c.sc_rh, SIOP_SCRATCHA); 488 switch (sstat1 & SSTAT1_PHASE_MASK) { 489 case SSTAT1_PHASE_STATUS: 490 /* 491 * previous phase may be aborted for any reason 492 * ( for example, the target has less data to 493 * transfer than requested). Just go to status 494 * and the command should terminate. 495 */ 496 INCSTAT(siop_stat_intr_shortxfer); 497 if ((dstat & DSTAT_DFE) == 0) 498 siop_clearfifo(&sc->sc_c); 499 /* no table to flush here */ 500 CALL_SCRIPT(Ent_status); 501 return 1; 502 case SSTAT1_PHASE_MSGIN: 503 /* 504 * target may be ready to disconnect 505 * Save data pointers just in case. 506 */ 507 INCSTAT(siop_stat_intr_xferdisc); 508 if (scratcha0 & A_flag_data) 509 siop_sdp(&siop_cmd->cmd_c); 510 else if ((dstat & DSTAT_DFE) == 0) 511 siop_clearfifo(&sc->sc_c); 512 bus_space_write_1(sc->sc_c.sc_rt, 513 sc->sc_c.sc_rh, SIOP_SCRATCHA, 514 scratcha0 & ~A_flag_data); 515 siop_table_sync(siop_cmd, 516 BUS_DMASYNC_PREREAD | 517 BUS_DMASYNC_PREWRITE); 518 CALL_SCRIPT(Ent_msgin); 519 return 1; 520 } 521 printf("%s: unexpected phase mismatch %d\n", 522 sc->sc_c.sc_dev.dv_xname, 523 sstat1 & SSTAT1_PHASE_MASK); 524 } else { 525 printf("%s: phase mismatch without command\n", 526 sc->sc_c.sc_dev.dv_xname); 527 } 528 need_reset = 1; 529 } 530 if (sist & SIST0_PAR) { 531 /* parity error, reset */ 532 if (siop_cmd) 533 scsipi_printaddr(xs->xs_periph); 534 else 535 printf("%s:", sc->sc_c.sc_dev.dv_xname); 536 printf("parity error\n"); 537 goto reset; 538 } 539 if ((sist & (SIST1_STO << 8)) && need_reset == 0) { 540 /* selection time out, assume there's no device here */ 541 if (siop_cmd) { 542 siop_cmd->cmd_c.status = CMDST_DONE; 543 xs->error = XS_SELTIMEOUT; 544 freetarget = 1; 545 goto end; 546 } else { 547 printf("%s: selection timeout without " 548 "command\n", sc->sc_c.sc_dev.dv_xname); 549 need_reset = 1; 550 } 551 } 552 if (sist & SIST0_UDC) { 553 /* 554 * unexpected disconnect. Usually the target signals 555 * a fatal condition this way. Attempt to get sense. 556 */ 557 if (siop_cmd) { 558 siop_cmd->cmd_tables->status = 559 htole32(SCSI_CHECK); 560 goto end; 561 } 562 printf("%s: unexpected disconnect without " 563 "command\n", sc->sc_c.sc_dev.dv_xname); 564 goto reset; 565 } 566 if (sist & (SIST1_SBMC << 8)) { 567 /* SCSI bus mode change */ 568 if (siop_modechange(&sc->sc_c) == 0 || need_reset == 1) 569 goto reset; 570 if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { 571 /* 572 * we have a script interrupt, it will 573 * restart the script. 574 */ 575 goto scintr; 576 } 577 /* 578 * else we have to restart it ourselve, at the 579 * interrupted instruction. 580 */ 581 bus_space_write_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 582 SIOP_DSP, 583 bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 584 SIOP_DSP) - 8); 585 return 1; 586 } 587 /* Else it's an unhandled exception (for now). */ 588 printf("%s: unhandled scsi interrupt, sist=0x%x sstat1=0x%x " 589 "DSA=0x%x DSP=0x%x\n", sc->sc_c.sc_dev.dv_xname, sist, 590 bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 591 SIOP_SSTAT1), 592 bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSA), 593 (int)(bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 594 SIOP_DSP) - sc->sc_c.sc_scriptaddr)); 595 if (siop_cmd) { 596 siop_cmd->cmd_c.status = CMDST_DONE; 597 xs->error = XS_SELTIMEOUT; 598 goto end; 599 } 600 need_reset = 1; 601 } 602 if (need_reset) { 603 reset: 604 /* fatal error, reset the bus */ 605 siop_resetbus(&sc->sc_c); 606 /* no table to flush here */ 607 return 1; 608 } 609 610 scintr: 611 if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { /* script interrupt */ 612 irqcode = bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 613 SIOP_DSPS); 614 #ifdef SIOP_DEBUG_INTR 615 printf("script interrupt 0x%x\n", irqcode); 616 #endif 617 /* 618 * no command, or an inactive command is only valid for a 619 * reselect interrupt 620 */ 621 if ((irqcode & 0x80) == 0) { 622 if (siop_cmd == NULL) { 623 printf( 624 "%s: script interrupt (0x%x) with invalid DSA !!!\n", 625 sc->sc_c.sc_dev.dv_xname, irqcode); 626 goto reset; 627 } 628 if (siop_cmd->cmd_c.status != CMDST_ACTIVE) { 629 printf("%s: command with invalid status " 630 "(IRQ code 0x%x current status %d) !\n", 631 sc->sc_c.sc_dev.dv_xname, 632 irqcode, siop_cmd->cmd_c.status); 633 xs = NULL; 634 } 635 } 636 switch(irqcode) { 637 case A_int_err: 638 printf("error, DSP=0x%x\n", 639 (int)(bus_space_read_4(sc->sc_c.sc_rt, 640 sc->sc_c.sc_rh, SIOP_DSP) - sc->sc_c.sc_scriptaddr)); 641 if (xs) { 642 xs->error = XS_SELTIMEOUT; 643 goto end; 644 } else { 645 goto reset; 646 } 647 case A_int_reseltarg: 648 printf("%s: reselect with invalid target\n", 649 sc->sc_c.sc_dev.dv_xname); 650 goto reset; 651 case A_int_resellun: 652 INCSTAT(siop_stat_intr_lunresel); 653 target = bus_space_read_1(sc->sc_c.sc_rt, 654 sc->sc_c.sc_rh, SIOP_SCRATCHA) & 0xf; 655 lun = bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 656 SIOP_SCRATCHA + 1); 657 tag = bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 658 SIOP_SCRATCHA + 2); 659 siop_target = 660 (struct siop_target *)sc->sc_c.targets[target]; 661 if (siop_target == NULL) { 662 printf("%s: reselect with invalid target %d\n", 663 sc->sc_c.sc_dev.dv_xname, target); 664 goto reset; 665 } 666 siop_lun = siop_target->siop_lun[lun]; 667 if (siop_lun == NULL) { 668 printf("%s: target %d reselect with invalid " 669 "lun %d\n", sc->sc_c.sc_dev.dv_xname, 670 target, lun); 671 goto reset; 672 } 673 if (siop_lun->siop_tag[tag].active == NULL) { 674 printf("%s: target %d lun %d tag %d reselect " 675 "without command\n", 676 sc->sc_c.sc_dev.dv_xname, 677 target, lun, tag); 678 goto reset; 679 } 680 siop_cmd = siop_lun->siop_tag[tag].active; 681 bus_space_write_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 682 SIOP_DSP, siop_cmd->cmd_c.dsa + 683 sizeof(struct siop_common_xfer) + 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_c.sc_dev.dv_xname); 690 goto reset; 691 case A_int_msgin: 692 { 693 int msgin = bus_space_read_1(sc->sc_c.sc_rt, 694 sc->sc_c.sc_rh, SIOP_SFBR); 695 if (msgin == MSG_MESSAGE_REJECT) { 696 int msg, extmsg; 697 if (siop_cmd->cmd_tables->msg_out[0] & 0x80) { 698 /* 699 * message was part of a identify + 700 * something else. Identify shouldn't 701 * have been rejected. 702 */ 703 msg = 704 siop_cmd->cmd_tables->msg_out[1]; 705 extmsg = 706 siop_cmd->cmd_tables->msg_out[3]; 707 } else { 708 msg = siop_cmd->cmd_tables->msg_out[0]; 709 extmsg = 710 siop_cmd->cmd_tables->msg_out[2]; 711 } 712 if (msg == MSG_MESSAGE_REJECT) { 713 /* MSG_REJECT for a MSG_REJECT !*/ 714 if (xs) 715 scsipi_printaddr(xs->xs_periph); 716 else 717 printf("%s: ", 718 sc->sc_c.sc_dev.dv_xname); 719 printf("our reject message was " 720 "rejected\n"); 721 goto reset; 722 } 723 if (msg == MSG_EXTENDED && 724 extmsg == MSG_EXT_WDTR) { 725 /* WDTR rejected, initiate sync */ 726 if ((siop_target->target_c.flags & 727 TARF_SYNC) == 0) { 728 siop_target->target_c.status = 729 TARST_OK; 730 siop_update_xfer_mode(&sc->sc_c, 731 target); 732 /* no table to flush here */ 733 CALL_SCRIPT(Ent_msgin_ack); 734 return 1; 735 } 736 siop_target->target_c.status = 737 TARST_SYNC_NEG; 738 siop_sdtr_msg(&siop_cmd->cmd_c, 0, 739 sc->sc_c.st_minsync, 740 sc->sc_c.maxoff); 741 siop_table_sync(siop_cmd, 742 BUS_DMASYNC_PREREAD | 743 BUS_DMASYNC_PREWRITE); 744 CALL_SCRIPT(Ent_send_msgout); 745 return 1; 746 } else if (msg == MSG_EXTENDED && 747 extmsg == MSG_EXT_SDTR) { 748 /* sync rejected */ 749 siop_target->target_c.offset = 0; 750 siop_target->target_c.period = 0; 751 siop_target->target_c.status = TARST_OK; 752 siop_update_xfer_mode(&sc->sc_c, 753 target); 754 /* no table to flush here */ 755 CALL_SCRIPT(Ent_msgin_ack); 756 return 1; 757 } else if (msg == MSG_SIMPLE_Q_TAG || 758 msg == MSG_HEAD_OF_Q_TAG || 759 msg == MSG_ORDERED_Q_TAG) { 760 if (siop_handle_qtag_reject( 761 siop_cmd) == -1) 762 goto reset; 763 CALL_SCRIPT(Ent_msgin_ack); 764 return 1; 765 } 766 if (xs) 767 scsipi_printaddr(xs->xs_periph); 768 else 769 printf("%s: ", 770 sc->sc_c.sc_dev.dv_xname); 771 if (msg == MSG_EXTENDED) { 772 printf("scsi message reject, extended " 773 "message sent was 0x%x\n", extmsg); 774 } else { 775 printf("scsi message reject, message " 776 "sent was 0x%x\n", msg); 777 } 778 /* no table to flush here */ 779 CALL_SCRIPT(Ent_msgin_ack); 780 return 1; 781 } 782 if (xs) 783 scsipi_printaddr(xs->xs_periph); 784 else 785 printf("%s: ", sc->sc_c.sc_dev.dv_xname); 786 printf("unhandled message 0x%x\n", 787 siop_cmd->cmd_tables->msg_in[0]); 788 siop_cmd->cmd_tables->msg_out[0] = MSG_MESSAGE_REJECT; 789 siop_cmd->cmd_tables->t_msgout.count= htole32(1); 790 siop_table_sync(siop_cmd, 791 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 792 CALL_SCRIPT(Ent_send_msgout); 793 return 1; 794 } 795 case A_int_extmsgin: 796 #ifdef SIOP_DEBUG_INTR 797 printf("extended message: msg 0x%x len %d\n", 798 siop_cmd->cmd_tables->msg_in[2], 799 siop_cmd->cmd_tables->msg_in[1]); 800 #endif 801 if (siop_cmd->cmd_tables->msg_in[1] > 802 sizeof(siop_cmd->cmd_tables->msg_in) - 2) 803 printf("%s: extended message too big (%d)\n", 804 sc->sc_c.sc_dev.dv_xname, 805 siop_cmd->cmd_tables->msg_in[1]); 806 siop_cmd->cmd_tables->t_extmsgdata.count = 807 htole32(siop_cmd->cmd_tables->msg_in[1] - 1); 808 siop_table_sync(siop_cmd, 809 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 810 CALL_SCRIPT(Ent_get_extmsgdata); 811 return 1; 812 case A_int_extmsgdata: 813 #ifdef SIOP_DEBUG_INTR 814 { 815 int i; 816 printf("extended message: 0x%x, data:", 817 siop_cmd->cmd_tables->msg_in[2]); 818 for (i = 3; i < 2 + siop_cmd->cmd_tables->msg_in[1]; 819 i++) 820 printf(" 0x%x", 821 siop_cmd->cmd_tables->msg_in[i]); 822 printf("\n"); 823 } 824 #endif 825 if (siop_cmd->cmd_tables->msg_in[2] == MSG_EXT_WDTR) { 826 switch (siop_wdtr_neg(&siop_cmd->cmd_c)) { 827 case SIOP_NEG_MSGOUT: 828 siop_update_scntl3(sc, 829 siop_cmd->cmd_c.siop_target); 830 siop_table_sync(siop_cmd, 831 BUS_DMASYNC_PREREAD | 832 BUS_DMASYNC_PREWRITE); 833 CALL_SCRIPT(Ent_send_msgout); 834 return(1); 835 case SIOP_NEG_ACK: 836 siop_update_scntl3(sc, 837 siop_cmd->cmd_c.siop_target); 838 CALL_SCRIPT(Ent_msgin_ack); 839 return(1); 840 default: 841 panic("invalid retval from " 842 "siop_wdtr_neg()"); 843 } 844 return(1); 845 } 846 if (siop_cmd->cmd_tables->msg_in[2] == MSG_EXT_SDTR) { 847 switch (siop_sdtr_neg(&siop_cmd->cmd_c)) { 848 case SIOP_NEG_MSGOUT: 849 siop_update_scntl3(sc, 850 siop_cmd->cmd_c.siop_target); 851 siop_table_sync(siop_cmd, 852 BUS_DMASYNC_PREREAD | 853 BUS_DMASYNC_PREWRITE); 854 CALL_SCRIPT(Ent_send_msgout); 855 return(1); 856 case SIOP_NEG_ACK: 857 siop_update_scntl3(sc, 858 siop_cmd->cmd_c.siop_target); 859 CALL_SCRIPT(Ent_msgin_ack); 860 return(1); 861 default: 862 panic("invalid retval from " 863 "siop_wdtr_neg()"); 864 } 865 return(1); 866 } 867 /* send a message reject */ 868 siop_cmd->cmd_tables->msg_out[0] = MSG_MESSAGE_REJECT; 869 siop_cmd->cmd_tables->t_msgout.count = htole32(1); 870 siop_table_sync(siop_cmd, 871 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 872 CALL_SCRIPT(Ent_send_msgout); 873 return 1; 874 case A_int_disc: 875 INCSTAT(siop_stat_intr_sdp); 876 offset = bus_space_read_1(sc->sc_c.sc_rt, 877 sc->sc_c.sc_rh, SIOP_SCRATCHA + 1); 878 #ifdef SIOP_DEBUG_DR 879 printf("disconnect offset %d\n", offset); 880 #endif 881 if (offset > SIOP_NSG) { 882 printf("%s: bad offset for disconnect (%d)\n", 883 sc->sc_c.sc_dev.dv_xname, offset); 884 goto reset; 885 } 886 /* 887 * offset == SIOP_NSG may be a valid condition if 888 * we get a sdp when the xfer is done. 889 * Don't call memmove in this case. 890 */ 891 if (offset < SIOP_NSG) { 892 memmove(&siop_cmd->cmd_tables->data[0], 893 &siop_cmd->cmd_tables->data[offset], 894 (SIOP_NSG - offset) * sizeof(scr_table_t)); 895 siop_table_sync(siop_cmd, 896 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 897 } 898 CALL_SCRIPT(Ent_script_sched); 899 return 1; 900 case A_int_resfail: 901 printf("reselect failed\n"); 902 CALL_SCRIPT(Ent_script_sched); 903 return 1; 904 case A_int_done: 905 if (xs == NULL) { 906 printf("%s: done without command, DSA=0x%lx\n", 907 sc->sc_c.sc_dev.dv_xname, 908 (u_long)siop_cmd->cmd_c.dsa); 909 siop_cmd->cmd_c.status = CMDST_FREE; 910 CALL_SCRIPT(Ent_script_sched); 911 return 1; 912 } 913 #ifdef SIOP_DEBUG_INTR 914 printf("done, DSA=0x%lx target id 0x%x last msg " 915 "in=0x%x status=0x%x\n", (u_long)siop_cmd->cmd_c.dsa, 916 le32toh(siop_cmd->cmd_tables->id), 917 siop_cmd->cmd_tables->msg_in[0], 918 le32toh(siop_cmd->cmd_tables->status)); 919 #endif 920 INCSTAT(siop_stat_intr_done); 921 siop_cmd->cmd_c.status = CMDST_DONE; 922 goto end; 923 default: 924 printf("unknown irqcode %x\n", irqcode); 925 if (xs) { 926 xs->error = XS_SELTIMEOUT; 927 goto end; 928 } 929 goto reset; 930 } 931 return 1; 932 } 933 /* We just should't get there */ 934 panic("siop_intr: I shouldn't be there !"); 935 936 end: 937 /* 938 * restart the script now if command completed properly 939 * Otherwise wait for siop_scsicmd_end(), we may need to cleanup the 940 * queue 941 */ 942 xs->status = le32toh(siop_cmd->cmd_tables->status); 943 if (xs->status == SCSI_OK) 944 CALL_SCRIPT(Ent_script_sched); 945 else 946 restart = 1; 947 siop_lun->siop_tag[tag].active = NULL; 948 siop_scsicmd_end(siop_cmd); 949 if (freetarget && siop_target->target_c.status == TARST_PROBING) 950 siop_del_dev(sc, target, lun); 951 if (restart) 952 CALL_SCRIPT(Ent_script_sched); 953 if (sc->sc_flags & SCF_CHAN_NOSLOT) { 954 /* a command terminated, so we have free slots now */ 955 sc->sc_flags &= ~SCF_CHAN_NOSLOT; 956 scsipi_channel_thaw(&sc->sc_c.sc_chan, 1); 957 } 958 959 return 1; 960 } 961 962 void 963 siop_scsicmd_end(siop_cmd) 964 struct siop_cmd *siop_cmd; 965 { 966 struct scsipi_xfer *xs = siop_cmd->cmd_c.xs; 967 struct siop_softc *sc = (struct siop_softc *)siop_cmd->cmd_c.siop_sc; 968 969 switch(xs->status) { 970 case SCSI_OK: 971 xs->error = XS_NOERROR; 972 break; 973 case SCSI_BUSY: 974 xs->error = XS_BUSY; 975 break; 976 case SCSI_CHECK: 977 xs->error = XS_BUSY; 978 /* remove commands in the queue and scheduler */ 979 siop_unqueue(sc, xs->xs_periph->periph_target, 980 xs->xs_periph->periph_lun); 981 break; 982 case SCSI_QUEUE_FULL: 983 INCSTAT(siop_stat_intr_qfull); 984 #ifdef SIOP_DEBUG 985 printf("%s:%d:%d: queue full (tag %d)\n", 986 sc->sc_c.sc_dev.dv_xname, 987 xs->xs_periph->periph_target, 988 xs->xs_periph->periph_lun, siop_cmd->cmd_c.tag); 989 #endif 990 xs->error = XS_BUSY; 991 break; 992 case SCSI_SIOP_NOCHECK: 993 /* 994 * don't check status, xs->error is already valid 995 */ 996 break; 997 case SCSI_SIOP_NOSTATUS: 998 /* 999 * the status byte was not updated, cmd was 1000 * aborted 1001 */ 1002 xs->error = XS_SELTIMEOUT; 1003 break; 1004 default: 1005 scsipi_printaddr(xs->xs_periph); 1006 printf("invalid status code %d\n", xs->status); 1007 xs->error = XS_DRIVER_STUFFUP; 1008 } 1009 if (xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) { 1010 bus_dmamap_sync(sc->sc_c.sc_dmat, siop_cmd->cmd_c.dmamap_data, 0, 1011 siop_cmd->cmd_c.dmamap_data->dm_mapsize, 1012 (xs->xs_control & XS_CTL_DATA_IN) ? 1013 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 1014 bus_dmamap_unload(sc->sc_c.sc_dmat, siop_cmd->cmd_c.dmamap_data); 1015 } 1016 bus_dmamap_unload(sc->sc_c.sc_dmat, siop_cmd->cmd_c.dmamap_cmd); 1017 callout_stop(&siop_cmd->cmd_c.xs->xs_callout); 1018 siop_cmd->cmd_c.status = CMDST_FREE; 1019 TAILQ_INSERT_TAIL(&sc->free_list, siop_cmd, next); 1020 xs->resid = 0; 1021 scsipi_done (xs); 1022 } 1023 1024 void 1025 siop_unqueue(sc, target, lun) 1026 struct siop_softc *sc; 1027 int target; 1028 int lun; 1029 { 1030 int slot, tag; 1031 struct siop_cmd *siop_cmd; 1032 struct siop_lun *siop_lun = 1033 ((struct siop_target *)sc->sc_c.targets[target])->siop_lun[lun]; 1034 1035 /* first make sure to read valid data */ 1036 siop_script_sync(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1037 1038 for (tag = 1; tag < SIOP_NTAG; tag++) { 1039 /* look for commands in the scheduler, not yet started */ 1040 if (siop_lun->siop_tag[tag].active == NULL) 1041 continue; 1042 siop_cmd = siop_lun->siop_tag[tag].active; 1043 for (slot = 0; slot <= sc->sc_currschedslot; slot++) { 1044 if (siop_script_read(sc, 1045 (Ent_script_sched_slot0 / 4) + slot * 2 + 1) == 1046 siop_cmd->cmd_c.dsa + 1047 sizeof(struct siop_common_xfer) + 1048 Ent_ldsa_select) 1049 break; 1050 } 1051 if (slot > sc->sc_currschedslot) 1052 continue; /* didn't find it */ 1053 if (siop_script_read(sc, 1054 (Ent_script_sched_slot0 / 4) + slot * 2) == 0x80000000) 1055 continue; /* already started */ 1056 /* clear the slot */ 1057 siop_script_write(sc, (Ent_script_sched_slot0 / 4) + slot * 2, 1058 0x80000000); 1059 /* ask to requeue */ 1060 siop_cmd->cmd_c.xs->error = XS_REQUEUE; 1061 siop_cmd->cmd_c.xs->status = SCSI_SIOP_NOCHECK; 1062 siop_lun->siop_tag[tag].active = NULL; 1063 siop_scsicmd_end(siop_cmd); 1064 } 1065 /* update sc_currschedslot */ 1066 sc->sc_currschedslot = 0; 1067 for (slot = SIOP_NSLOTS - 1; slot >= 0; slot--) { 1068 if (siop_script_read(sc, 1069 (Ent_script_sched_slot0 / 4) + slot * 2) != 0x80000000) 1070 sc->sc_currschedslot = slot; 1071 } 1072 } 1073 1074 /* 1075 * handle a rejected queue tag message: the command will run untagged, 1076 * has to adjust the reselect script. 1077 */ 1078 int 1079 siop_handle_qtag_reject(siop_cmd) 1080 struct siop_cmd *siop_cmd; 1081 { 1082 struct siop_softc *sc = (struct siop_softc *)siop_cmd->cmd_c.siop_sc; 1083 int target = siop_cmd->cmd_c.xs->xs_periph->periph_target; 1084 int lun = siop_cmd->cmd_c.xs->xs_periph->periph_lun; 1085 int tag = siop_cmd->cmd_tables->msg_out[2]; 1086 struct siop_lun *siop_lun = 1087 ((struct siop_target*)sc->sc_c.targets[target])->siop_lun[lun]; 1088 1089 #ifdef SIOP_DEBUG 1090 printf("%s:%d:%d: tag message %d (%d) rejected (status %d)\n", 1091 sc->sc_c.sc_dev.dv_xname, target, lun, tag, siop_cmd->cmd_c.tag, 1092 siop_cmd->cmd_c.status); 1093 #endif 1094 1095 if (siop_lun->siop_tag[0].active != NULL) { 1096 printf("%s: untagged command already running for target %d " 1097 "lun %d (status %d)\n", sc->sc_c.sc_dev.dv_xname, 1098 target, lun, siop_lun->siop_tag[0].active->cmd_c.status); 1099 return -1; 1100 } 1101 /* clear tag slot */ 1102 siop_lun->siop_tag[tag].active = NULL; 1103 /* add command to non-tagged slot */ 1104 siop_lun->siop_tag[0].active = siop_cmd; 1105 siop_cmd->cmd_c.tag = 0; 1106 /* adjust reselect script if there is one */ 1107 if (siop_lun->siop_tag[0].reseloff > 0) { 1108 siop_script_write(sc, 1109 siop_lun->siop_tag[0].reseloff + 1, 1110 siop_cmd->cmd_c.dsa + sizeof(struct siop_common_xfer) + 1111 Ent_ldsa_reload_dsa); 1112 siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE); 1113 } 1114 return 0; 1115 } 1116 1117 /* 1118 * handle a bus reset: reset chip, unqueue all active commands, free all 1119 * target struct and report lossage to upper layer. 1120 * As the upper layer may requeue immediatly we have to first store 1121 * all active commands in a temporary queue. 1122 */ 1123 void 1124 siop_handle_reset(sc) 1125 struct siop_softc *sc; 1126 { 1127 struct siop_cmd *siop_cmd; 1128 struct siop_lun *siop_lun; 1129 int target, lun, tag; 1130 /* 1131 * scsi bus reset. reset the chip and restart 1132 * the queue. Need to clean up all active commands 1133 */ 1134 printf("%s: scsi bus reset\n", sc->sc_c.sc_dev.dv_xname); 1135 /* stop, reset and restart the chip */ 1136 siop_reset(sc); 1137 if (sc->sc_flags & SCF_CHAN_NOSLOT) { 1138 /* chip has been reset, all slots are free now */ 1139 sc->sc_flags &= ~SCF_CHAN_NOSLOT; 1140 scsipi_channel_thaw(&sc->sc_c.sc_chan, 1); 1141 } 1142 /* 1143 * Process all commands: first commands being executed 1144 */ 1145 for (target = 0; target < sc->sc_c.sc_chan.chan_ntargets; 1146 target++) { 1147 if (sc->sc_c.targets[target] == NULL) 1148 continue; 1149 for (lun = 0; lun < 8; lun++) { 1150 struct siop_target *siop_target = 1151 (struct siop_target *)sc->sc_c.targets[target]; 1152 siop_lun = siop_target->siop_lun[lun]; 1153 if (siop_lun == NULL) 1154 continue; 1155 for (tag = 0; tag < 1156 ((sc->sc_c.targets[target]->flags & TARF_TAG) ? 1157 SIOP_NTAG : 1); 1158 tag++) { 1159 siop_cmd = siop_lun->siop_tag[tag].active; 1160 if (siop_cmd == NULL) 1161 continue; 1162 scsipi_printaddr(siop_cmd->cmd_c.xs->xs_periph); 1163 printf("command with tag id %d reset\n", tag); 1164 siop_cmd->cmd_c.xs->error = 1165 (siop_cmd->cmd_c.flags & CMDFL_TIMEOUT) ? 1166 XS_TIMEOUT : XS_RESET; 1167 siop_cmd->cmd_c.xs->status = SCSI_SIOP_NOCHECK; 1168 siop_lun->siop_tag[tag].active = NULL; 1169 siop_cmd->cmd_c.status = CMDST_DONE; 1170 siop_scsicmd_end(siop_cmd); 1171 } 1172 } 1173 sc->sc_c.targets[target]->status = TARST_ASYNC; 1174 sc->sc_c.targets[target]->flags &= ~TARF_ISWIDE; 1175 sc->sc_c.targets[target]->period = 1176 sc->sc_c.targets[target]->offset = 0; 1177 siop_update_xfer_mode(&sc->sc_c, target); 1178 } 1179 1180 scsipi_async_event(&sc->sc_c.sc_chan, ASYNC_EVENT_RESET, NULL); 1181 } 1182 1183 void 1184 siop_scsipi_request(chan, req, arg) 1185 struct scsipi_channel *chan; 1186 scsipi_adapter_req_t req; 1187 void *arg; 1188 { 1189 struct scsipi_xfer *xs; 1190 struct scsipi_periph *periph; 1191 struct siop_softc *sc = (void *)chan->chan_adapter->adapt_dev; 1192 struct siop_cmd *siop_cmd; 1193 struct siop_target *siop_target; 1194 int s, error, i; 1195 int target; 1196 int lun; 1197 1198 switch (req) { 1199 case ADAPTER_REQ_RUN_XFER: 1200 xs = arg; 1201 periph = xs->xs_periph; 1202 target = periph->periph_target; 1203 lun = periph->periph_lun; 1204 1205 s = splbio(); 1206 #ifdef SIOP_DEBUG_SCHED 1207 printf("starting cmd for %d:%d\n", target, lun); 1208 #endif 1209 siop_cmd = TAILQ_FIRST(&sc->free_list); 1210 if (siop_cmd == NULL) { 1211 xs->error = XS_RESOURCE_SHORTAGE; 1212 scsipi_done(xs); 1213 splx(s); 1214 return; 1215 } 1216 TAILQ_REMOVE(&sc->free_list, siop_cmd, next); 1217 #ifdef DIAGNOSTIC 1218 if (siop_cmd->cmd_c.status != CMDST_FREE) 1219 panic("siop_scsicmd: new cmd not free"); 1220 #endif 1221 siop_target = (struct siop_target*)sc->sc_c.targets[target]; 1222 if (siop_target == NULL) { 1223 #ifdef SIOP_DEBUG 1224 printf("%s: alloc siop_target for target %d\n", 1225 sc->sc_c.sc_dev.dv_xname, target); 1226 #endif 1227 sc->sc_c.targets[target] = 1228 malloc(sizeof(struct siop_target), 1229 M_DEVBUF, M_NOWAIT); 1230 if (sc->sc_c.targets[target] == NULL) { 1231 printf("%s: can't malloc memory for " 1232 "target %d\n", sc->sc_c.sc_dev.dv_xname, 1233 target); 1234 xs->error = XS_RESOURCE_SHORTAGE; 1235 scsipi_done(xs); 1236 splx(s); 1237 return; 1238 } 1239 siop_target = 1240 (struct siop_target*)sc->sc_c.targets[target]; 1241 siop_target->target_c.status = TARST_PROBING; 1242 siop_target->target_c.flags = 0; 1243 siop_target->target_c.id = 1244 sc->sc_c.clock_div << 24; /* scntl3 */ 1245 siop_target->target_c.id |= target << 16; /* id */ 1246 /* siop_target->target_c.id |= 0x0 << 8; scxfer is 0 */ 1247 1248 /* get a lun switch script */ 1249 siop_target->lunsw = siop_get_lunsw(sc); 1250 if (siop_target->lunsw == NULL) { 1251 printf("%s: can't alloc lunsw for target %d\n", 1252 sc->sc_c.sc_dev.dv_xname, target); 1253 xs->error = XS_RESOURCE_SHORTAGE; 1254 scsipi_done(xs); 1255 splx(s); 1256 return; 1257 } 1258 for (i=0; i < 8; i++) 1259 siop_target->siop_lun[i] = NULL; 1260 siop_add_reselsw(sc, target); 1261 } 1262 if (siop_target->siop_lun[lun] == NULL) { 1263 siop_target->siop_lun[lun] = 1264 malloc(sizeof(struct siop_lun), M_DEVBUF, 1265 M_NOWAIT|M_ZERO); 1266 if (siop_target->siop_lun[lun] == NULL) { 1267 printf("%s: can't alloc siop_lun for " 1268 "target %d lun %d\n", 1269 sc->sc_c.sc_dev.dv_xname, target, lun); 1270 xs->error = XS_RESOURCE_SHORTAGE; 1271 scsipi_done(xs); 1272 splx(s); 1273 return; 1274 } 1275 } 1276 siop_cmd->cmd_c.siop_target = sc->sc_c.targets[target]; 1277 siop_cmd->cmd_c.xs = xs; 1278 siop_cmd->cmd_c.flags = 0; 1279 siop_cmd->cmd_c.status = CMDST_READY; 1280 1281 /* load the DMA maps */ 1282 error = bus_dmamap_load(sc->sc_c.sc_dmat, 1283 siop_cmd->cmd_c.dmamap_cmd, 1284 xs->cmd, xs->cmdlen, NULL, BUS_DMA_NOWAIT); 1285 if (error) { 1286 printf("%s: unable to load cmd DMA map: %d\n", 1287 sc->sc_c.sc_dev.dv_xname, error); 1288 xs->error = XS_DRIVER_STUFFUP; 1289 scsipi_done(xs); 1290 splx(s); 1291 return; 1292 } 1293 if (xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) { 1294 error = bus_dmamap_load(sc->sc_c.sc_dmat, 1295 siop_cmd->cmd_c.dmamap_data, xs->data, xs->datalen, 1296 NULL, BUS_DMA_NOWAIT | BUS_DMA_STREAMING | 1297 ((xs->xs_control & XS_CTL_DATA_IN) ? 1298 BUS_DMA_READ : BUS_DMA_WRITE)); 1299 if (error) { 1300 printf("%s: unable to load cmd DMA map: %d", 1301 sc->sc_c.sc_dev.dv_xname, error); 1302 xs->error = XS_DRIVER_STUFFUP; 1303 scsipi_done(xs); 1304 bus_dmamap_unload(sc->sc_c.sc_dmat, 1305 siop_cmd->cmd_c.dmamap_cmd); 1306 splx(s); 1307 return; 1308 } 1309 bus_dmamap_sync(sc->sc_c.sc_dmat, 1310 siop_cmd->cmd_c.dmamap_data, 0, 1311 siop_cmd->cmd_c.dmamap_data->dm_mapsize, 1312 (xs->xs_control & XS_CTL_DATA_IN) ? 1313 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 1314 } 1315 bus_dmamap_sync(sc->sc_c.sc_dmat, siop_cmd->cmd_c.dmamap_cmd, 0, 1316 siop_cmd->cmd_c.dmamap_cmd->dm_mapsize, 1317 BUS_DMASYNC_PREWRITE); 1318 1319 if (xs->xs_tag_type) { 1320 /* use tag_id + 1, tag 0 is reserved for untagged cmds*/ 1321 siop_cmd->cmd_c.tag = xs->xs_tag_id + 1; 1322 } else { 1323 siop_cmd->cmd_c.tag = 0; 1324 } 1325 siop_setuptables(&siop_cmd->cmd_c); 1326 siop_table_sync(siop_cmd, 1327 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1328 siop_start(sc, siop_cmd); 1329 if (xs->xs_control & XS_CTL_POLL) { 1330 /* poll for command completion */ 1331 while ((xs->xs_status & XS_STS_DONE) == 0) { 1332 delay(1000); 1333 siop_intr(sc); 1334 } 1335 } 1336 splx(s); 1337 return; 1338 1339 case ADAPTER_REQ_GROW_RESOURCES: 1340 #ifdef SIOP_DEBUG 1341 printf("%s grow resources (%d)\n", sc->sc_c.sc_dev.dv_xname, 1342 sc->sc_c.sc_adapt.adapt_openings); 1343 #endif 1344 siop_morecbd(sc); 1345 return; 1346 1347 case ADAPTER_REQ_SET_XFER_MODE: 1348 { 1349 struct scsipi_xfer_mode *xm = arg; 1350 if (sc->sc_c.targets[xm->xm_target] == NULL) 1351 return; 1352 s = splbio(); 1353 if (xm->xm_mode & PERIPH_CAP_TQING) 1354 sc->sc_c.targets[xm->xm_target]->flags |= TARF_TAG; 1355 if ((xm->xm_mode & PERIPH_CAP_WIDE16) && 1356 (sc->sc_c.features & SF_BUS_WIDE)) 1357 sc->sc_c.targets[xm->xm_target]->flags |= TARF_WIDE; 1358 if (xm->xm_mode & PERIPH_CAP_SYNC) 1359 sc->sc_c.targets[xm->xm_target]->flags |= TARF_SYNC; 1360 if ((xm->xm_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_WIDE16)) || 1361 sc->sc_c.targets[xm->xm_target]->status == TARST_PROBING) 1362 sc->sc_c.targets[xm->xm_target]->status = 1363 TARST_ASYNC; 1364 1365 for (lun = 0; lun < sc->sc_c.sc_chan.chan_nluns; lun++) { 1366 if (scsipi_lookup_periph(chan, 1367 xm->xm_target, lun) != NULL) { 1368 /* allocate a lun sw entry for this device */ 1369 siop_add_dev(sc, xm->xm_target, lun); 1370 } 1371 } 1372 1373 splx(s); 1374 } 1375 } 1376 } 1377 1378 static void 1379 siop_start(sc, siop_cmd) 1380 struct siop_softc *sc; 1381 struct siop_cmd *siop_cmd; 1382 { 1383 struct siop_lun *siop_lun; 1384 struct siop_xfer *siop_xfer; 1385 u_int32_t dsa; 1386 int timeout; 1387 int target, lun, slot; 1388 1389 /* 1390 * first make sure to read valid data 1391 */ 1392 siop_script_sync(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1393 1394 /* 1395 * The queue management here is a bit tricky: the script always looks 1396 * at the slot from first to last, so if we always use the first 1397 * free slot commands can stay at the tail of the queue ~forever. 1398 * The algorithm used here is to restart from the head when we know 1399 * that the queue is empty, and only add commands after the last one. 1400 * When we're at the end of the queue wait for the script to clear it. 1401 * The best thing to do here would be to implement a circular queue, 1402 * but using only 53c720 features this can be "interesting". 1403 * A mid-way solution could be to implement 2 queues and swap orders. 1404 */ 1405 slot = sc->sc_currschedslot; 1406 /* 1407 * If the instruction is 0x80000000 (JUMP foo, IF FALSE) the slot is 1408 * free. As this is the last used slot, all previous slots are free, 1409 * we can restart from 0. 1410 */ 1411 if (siop_script_read(sc, (Ent_script_sched_slot0 / 4) + slot * 2) == 1412 0x80000000) { 1413 slot = sc->sc_currschedslot = 0; 1414 } else { 1415 slot++; 1416 } 1417 target = siop_cmd->cmd_c.xs->xs_periph->periph_target; 1418 lun = siop_cmd->cmd_c.xs->xs_periph->periph_lun; 1419 siop_lun = 1420 ((struct siop_target*)sc->sc_c.targets[target])->siop_lun[lun]; 1421 /* if non-tagged command active, panic: this shouldn't happen */ 1422 if (siop_lun->siop_tag[0].active != NULL) { 1423 panic("siop_start: tagged cmd while untagged running"); 1424 } 1425 #ifdef DIAGNOSTIC 1426 /* sanity check the tag if needed */ 1427 if (siop_cmd->cmd_c.flags & CMDFL_TAG) { 1428 if (siop_lun->siop_tag[siop_cmd->cmd_c.tag].active != NULL) 1429 panic("siop_start: tag not free"); 1430 if (siop_cmd->cmd_c.tag >= SIOP_NTAG) { 1431 scsipi_printaddr(siop_cmd->cmd_c.xs->xs_periph); 1432 printf(": tag id %d\n", siop_cmd->cmd_c.tag); 1433 panic("siop_start: invalid tag id"); 1434 } 1435 } 1436 #endif 1437 /* 1438 * find a free scheduler slot and load it. 1439 */ 1440 for (; slot < SIOP_NSLOTS; slot++) { 1441 /* 1442 * If cmd if 0x80000000 the slot is free 1443 */ 1444 if (siop_script_read(sc, 1445 (Ent_script_sched_slot0 / 4) + slot * 2) == 1446 0x80000000) 1447 break; 1448 } 1449 if (slot == SIOP_NSLOTS) { 1450 /* 1451 * no more free slot, no need to continue. freeze the queue 1452 * and requeue this command. 1453 */ 1454 scsipi_channel_freeze(&sc->sc_c.sc_chan, 1); 1455 sc->sc_flags |= SCF_CHAN_NOSLOT; 1456 siop_cmd->cmd_c.xs->error = XS_REQUEUE; 1457 siop_cmd->cmd_c.xs->status = SCSI_SIOP_NOCHECK; 1458 siop_scsicmd_end(siop_cmd); 1459 return; 1460 } 1461 #ifdef SIOP_DEBUG_SCHED 1462 printf("using slot %d for DSA 0x%lx\n", slot, 1463 (u_long)siop_cmd->cmd_c.dsa); 1464 #endif 1465 /* mark command as active */ 1466 if (siop_cmd->cmd_c.status == CMDST_READY) 1467 siop_cmd->cmd_c.status = CMDST_ACTIVE; 1468 else 1469 panic("siop_start: bad status"); 1470 siop_lun->siop_tag[siop_cmd->cmd_c.tag].active = siop_cmd; 1471 /* patch scripts with DSA addr */ 1472 dsa = siop_cmd->cmd_c.dsa; 1473 /* first reselect switch, if we have an entry */ 1474 if (siop_lun->siop_tag[siop_cmd->cmd_c.tag].reseloff > 0) 1475 siop_script_write(sc, 1476 siop_lun->siop_tag[siop_cmd->cmd_c.tag].reseloff + 1, 1477 dsa + sizeof(struct siop_common_xfer) + 1478 Ent_ldsa_reload_dsa); 1479 /* CMD script: MOVE MEMORY addr */ 1480 siop_xfer = (struct siop_xfer*)siop_cmd->cmd_tables; 1481 siop_xfer->resel[E_ldsa_abs_slot_Used[0]] = 1482 htole32(sc->sc_c.sc_scriptaddr + Ent_script_sched_slot0 + slot * 8); 1483 siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE); 1484 /* scheduler slot: JUMP ldsa_select */ 1485 siop_script_write(sc, 1486 (Ent_script_sched_slot0 / 4) + slot * 2 + 1, 1487 dsa + sizeof(struct siop_common_xfer) + Ent_ldsa_select); 1488 /* handle timeout */ 1489 if ((siop_cmd->cmd_c.xs->xs_control & XS_CTL_POLL) == 0) { 1490 /* start exire timer */ 1491 timeout = mstohz(siop_cmd->cmd_c.xs->timeout); 1492 if (timeout == 0) 1493 timeout = 1; 1494 callout_reset( &siop_cmd->cmd_c.xs->xs_callout, 1495 timeout, siop_timeout, siop_cmd); 1496 } 1497 /* 1498 * Change JUMP cmd so that this slot will be handled 1499 */ 1500 siop_script_write(sc, (Ent_script_sched_slot0 / 4) + slot * 2, 1501 0x80080000); 1502 sc->sc_currschedslot = slot; 1503 1504 /* make sure SCRIPT processor will read valid data */ 1505 siop_script_sync(sc,BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1506 /* Signal script it has some work to do */ 1507 bus_space_write_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, 1508 SIOP_ISTAT, ISTAT_SIGP); 1509 /* and wait for IRQ */ 1510 return; 1511 } 1512 1513 void 1514 siop_timeout(v) 1515 void *v; 1516 { 1517 struct siop_cmd *siop_cmd = v; 1518 struct siop_softc *sc = (struct siop_softc *)siop_cmd->cmd_c.siop_sc; 1519 int s; 1520 1521 scsipi_printaddr(siop_cmd->cmd_c.xs->xs_periph); 1522 printf("command timeout, CDB: "); 1523 scsipi_print_cdb(siop_cmd->cmd_c.xs->cmd); 1524 printf("\n"); 1525 1526 s = splbio(); 1527 /* reset the scsi bus */ 1528 siop_resetbus(&sc->sc_c); 1529 1530 /* deactivate callout */ 1531 callout_stop(&siop_cmd->cmd_c.xs->xs_callout); 1532 /* mark command as being timed out; siop_intr will handle it */ 1533 /* 1534 * mark command has being timed out and just return; 1535 * the bus reset will generate an interrupt, 1536 * it will be handled in siop_intr() 1537 */ 1538 siop_cmd->cmd_c.flags |= CMDFL_TIMEOUT; 1539 splx(s); 1540 return; 1541 1542 } 1543 1544 void 1545 siop_dump_script(sc) 1546 struct siop_softc *sc; 1547 { 1548 int i; 1549 for (i = 0; i < PAGE_SIZE / 4; i += 2) { 1550 printf("0x%04x: 0x%08x 0x%08x", i * 4, 1551 le32toh(sc->sc_c.sc_script[i]), 1552 le32toh(sc->sc_c.sc_script[i+1])); 1553 if ((le32toh(sc->sc_c.sc_script[i]) & 0xe0000000) == 1554 0xc0000000) { 1555 i++; 1556 printf(" 0x%08x", le32toh(sc->sc_c.sc_script[i+1])); 1557 } 1558 printf("\n"); 1559 } 1560 } 1561 1562 void 1563 siop_morecbd(sc) 1564 struct siop_softc *sc; 1565 { 1566 int error, i, j, s; 1567 bus_dma_segment_t seg; 1568 int rseg; 1569 struct siop_cbd *newcbd; 1570 struct siop_xfer *xfer; 1571 bus_addr_t dsa; 1572 u_int32_t *scr; 1573 1574 /* allocate a new list head */ 1575 newcbd = malloc(sizeof(struct siop_cbd), M_DEVBUF, M_NOWAIT|M_ZERO); 1576 if (newcbd == NULL) { 1577 printf("%s: can't allocate memory for command descriptors " 1578 "head\n", sc->sc_c.sc_dev.dv_xname); 1579 return; 1580 } 1581 1582 /* allocate cmd list */ 1583 newcbd->cmds = malloc(sizeof(struct siop_cmd) * SIOP_NCMDPB, 1584 M_DEVBUF, M_NOWAIT|M_ZERO); 1585 if (newcbd->cmds == NULL) { 1586 printf("%s: can't allocate memory for command descriptors\n", 1587 sc->sc_c.sc_dev.dv_xname); 1588 goto bad3; 1589 } 1590 error = bus_dmamem_alloc(sc->sc_c.sc_dmat, PAGE_SIZE, PAGE_SIZE, 0, &seg, 1591 1, &rseg, BUS_DMA_NOWAIT); 1592 if (error) { 1593 printf("%s: unable to allocate cbd DMA memory, error = %d\n", 1594 sc->sc_c.sc_dev.dv_xname, error); 1595 goto bad2; 1596 } 1597 error = bus_dmamem_map(sc->sc_c.sc_dmat, &seg, rseg, PAGE_SIZE, 1598 (caddr_t *)&newcbd->xfers, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 1599 if (error) { 1600 printf("%s: unable to map cbd DMA memory, error = %d\n", 1601 sc->sc_c.sc_dev.dv_xname, error); 1602 goto bad2; 1603 } 1604 error = bus_dmamap_create(sc->sc_c.sc_dmat, PAGE_SIZE, 1, PAGE_SIZE, 0, 1605 BUS_DMA_NOWAIT, &newcbd->xferdma); 1606 if (error) { 1607 printf("%s: unable to create cbd DMA map, error = %d\n", 1608 sc->sc_c.sc_dev.dv_xname, error); 1609 goto bad1; 1610 } 1611 error = bus_dmamap_load(sc->sc_c.sc_dmat, newcbd->xferdma, newcbd->xfers, 1612 PAGE_SIZE, NULL, BUS_DMA_NOWAIT); 1613 if (error) { 1614 printf("%s: unable to load cbd DMA map, error = %d\n", 1615 sc->sc_c.sc_dev.dv_xname, error); 1616 goto bad0; 1617 } 1618 #ifdef DEBUG 1619 printf("%s: alloc newcdb at PHY addr 0x%lx\n", sc->sc_c.sc_dev.dv_xname, 1620 (unsigned long)newcbd->xferdma->dm_segs[0].ds_addr); 1621 #endif 1622 for (i = 0; i < SIOP_NCMDPB; i++) { 1623 error = bus_dmamap_create(sc->sc_c.sc_dmat, MAXPHYS, SIOP_NSG, 1624 MAXPHYS, 0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, 1625 &newcbd->cmds[i].cmd_c.dmamap_data); 1626 if (error) { 1627 printf("%s: unable to create data DMA map for cbd: " 1628 "error %d\n", 1629 sc->sc_c.sc_dev.dv_xname, error); 1630 goto bad0; 1631 } 1632 error = bus_dmamap_create(sc->sc_c.sc_dmat, 1633 sizeof(struct scsipi_generic), 1, 1634 sizeof(struct scsipi_generic), 0, 1635 BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, 1636 &newcbd->cmds[i].cmd_c.dmamap_cmd); 1637 if (error) { 1638 printf("%s: unable to create cmd DMA map for cbd %d\n", 1639 sc->sc_c.sc_dev.dv_xname, error); 1640 goto bad0; 1641 } 1642 newcbd->cmds[i].cmd_c.siop_sc = &sc->sc_c; 1643 newcbd->cmds[i].siop_cbdp = newcbd; 1644 xfer = &newcbd->xfers[i]; 1645 newcbd->cmds[i].cmd_tables = (struct siop_common_xfer *)xfer; 1646 memset(newcbd->cmds[i].cmd_tables, 0, sizeof(struct siop_xfer)); 1647 dsa = newcbd->xferdma->dm_segs[0].ds_addr + 1648 i * sizeof(struct siop_xfer); 1649 newcbd->cmds[i].cmd_c.dsa = dsa; 1650 newcbd->cmds[i].cmd_c.status = CMDST_FREE; 1651 xfer->siop_tables.t_msgout.count= htole32(1); 1652 xfer->siop_tables.t_msgout.addr = htole32(dsa); 1653 xfer->siop_tables.t_msgin.count= htole32(1); 1654 xfer->siop_tables.t_msgin.addr = htole32(dsa + 1655 offsetof(struct siop_common_xfer, msg_in)); 1656 xfer->siop_tables.t_extmsgin.count= htole32(2); 1657 xfer->siop_tables.t_extmsgin.addr = htole32(dsa + 1658 offsetof(struct siop_common_xfer, msg_in) + 1); 1659 xfer->siop_tables.t_extmsgdata.addr = htole32(dsa + 1660 offsetof(struct siop_common_xfer, msg_in) + 3); 1661 xfer->siop_tables.t_status.count= htole32(1); 1662 xfer->siop_tables.t_status.addr = htole32(dsa + 1663 offsetof(struct siop_common_xfer, status)); 1664 /* The select/reselect script */ 1665 scr = &xfer->resel[0]; 1666 for (j = 0; j < sizeof(load_dsa) / sizeof(load_dsa[0]); j++) 1667 scr[j] = htole32(load_dsa[j]); 1668 /* 1669 * 0x78000000 is a 'move data8 to reg'. data8 is the second 1670 * octet, reg offset is the third. 1671 */ 1672 scr[Ent_rdsa0 / 4] = 1673 htole32(0x78100000 | ((dsa & 0x000000ff) << 8)); 1674 scr[Ent_rdsa1 / 4] = 1675 htole32(0x78110000 | ( dsa & 0x0000ff00 )); 1676 scr[Ent_rdsa2 / 4] = 1677 htole32(0x78120000 | ((dsa & 0x00ff0000) >> 8)); 1678 scr[Ent_rdsa3 / 4] = 1679 htole32(0x78130000 | ((dsa & 0xff000000) >> 16)); 1680 scr[E_ldsa_abs_reselected_Used[0]] = 1681 htole32(sc->sc_c.sc_scriptaddr + Ent_reselected); 1682 scr[E_ldsa_abs_reselect_Used[0]] = 1683 htole32(sc->sc_c.sc_scriptaddr + Ent_reselect); 1684 scr[E_ldsa_abs_selected_Used[0]] = 1685 htole32(sc->sc_c.sc_scriptaddr + Ent_selected); 1686 scr[E_ldsa_abs_data_Used[0]] = 1687 htole32(dsa + sizeof(struct siop_common_xfer) + 1688 Ent_ldsa_data); 1689 /* JUMP foo, IF FALSE - used by MOVE MEMORY to clear the slot */ 1690 scr[Ent_ldsa_data / 4] = htole32(0x80000000); 1691 s = splbio(); 1692 TAILQ_INSERT_TAIL(&sc->free_list, &newcbd->cmds[i], next); 1693 splx(s); 1694 #ifdef SIOP_DEBUG 1695 printf("tables[%d]: in=0x%x out=0x%x status=0x%x\n", i, 1696 le32toh(newcbd->cmds[i].cmd_tables->t_msgin.addr), 1697 le32toh(newcbd->cmds[i].cmd_tables->t_msgout.addr), 1698 le32toh(newcbd->cmds[i].cmd_tables->t_status.addr)); 1699 #endif 1700 } 1701 s = splbio(); 1702 TAILQ_INSERT_TAIL(&sc->cmds, newcbd, next); 1703 sc->sc_c.sc_adapt.adapt_openings += SIOP_NCMDPB; 1704 splx(s); 1705 return; 1706 bad0: 1707 bus_dmamap_unload(sc->sc_c.sc_dmat, newcbd->xferdma); 1708 bus_dmamap_destroy(sc->sc_c.sc_dmat, newcbd->xferdma); 1709 bad1: 1710 bus_dmamem_free(sc->sc_c.sc_dmat, &seg, rseg); 1711 bad2: 1712 free(newcbd->cmds, M_DEVBUF); 1713 bad3: 1714 free(newcbd, M_DEVBUF); 1715 return; 1716 } 1717 1718 struct siop_lunsw * 1719 siop_get_lunsw(sc) 1720 struct siop_softc *sc; 1721 { 1722 struct siop_lunsw *lunsw; 1723 int i; 1724 1725 if (sc->script_free_lo + (sizeof(lun_switch) / sizeof(lun_switch[0])) >= 1726 sc->script_free_hi) 1727 return NULL; 1728 lunsw = TAILQ_FIRST(&sc->lunsw_list); 1729 if (lunsw != NULL) { 1730 #ifdef SIOP_DEBUG 1731 printf("siop_get_lunsw got lunsw at offset %d\n", 1732 lunsw->lunsw_off); 1733 #endif 1734 TAILQ_REMOVE(&sc->lunsw_list, lunsw, next); 1735 return lunsw; 1736 } 1737 lunsw = malloc(sizeof(struct siop_lunsw), M_DEVBUF, M_NOWAIT|M_ZERO); 1738 if (lunsw == NULL) 1739 return NULL; 1740 #ifdef SIOP_DEBUG 1741 printf("allocating lunsw at offset %d\n", sc->script_free_lo); 1742 #endif 1743 if (sc->sc_c.features & SF_CHIP_RAM) { 1744 bus_space_write_region_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh, 1745 sc->script_free_lo * 4, lun_switch, 1746 sizeof(lun_switch) / sizeof(lun_switch[0])); 1747 bus_space_write_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh, 1748 (sc->script_free_lo + E_abs_lunsw_return_Used[0]) * 4, 1749 sc->sc_c.sc_scriptaddr + Ent_lunsw_return); 1750 } else { 1751 for (i = 0; i < sizeof(lun_switch) / sizeof(lun_switch[0]); 1752 i++) 1753 sc->sc_c.sc_script[sc->script_free_lo + i] = 1754 htole32(lun_switch[i]); 1755 sc->sc_c.sc_script[ 1756 sc->script_free_lo + E_abs_lunsw_return_Used[0]] = 1757 htole32(sc->sc_c.sc_scriptaddr + Ent_lunsw_return); 1758 } 1759 lunsw->lunsw_off = sc->script_free_lo; 1760 lunsw->lunsw_size = sizeof(lun_switch) / sizeof(lun_switch[0]); 1761 sc->script_free_lo += lunsw->lunsw_size; 1762 siop_script_sync(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1763 return lunsw; 1764 } 1765 1766 void 1767 siop_add_reselsw(sc, target) 1768 struct siop_softc *sc; 1769 int target; 1770 { 1771 int i, j; 1772 struct siop_target *siop_target; 1773 struct siop_lun *siop_lun; 1774 1775 siop_target = (struct siop_target *)sc->sc_c.targets[target]; 1776 /* 1777 * add an entry to resel switch 1778 */ 1779 siop_script_sync(sc, BUS_DMASYNC_POSTWRITE); 1780 for (i = 0; i < 15; i++) { 1781 siop_target->reseloff = Ent_resel_targ0 / 4 + i * 2; 1782 if ((siop_script_read(sc, siop_target->reseloff) & 0xff) 1783 == 0xff) { /* it's free */ 1784 #ifdef SIOP_DEBUG 1785 printf("siop: target %d slot %d offset %d\n", 1786 target, i, siop_target->reseloff); 1787 #endif 1788 /* JUMP abs_foo, IF target | 0x80; */ 1789 siop_script_write(sc, siop_target->reseloff, 1790 0x800c0080 | target); 1791 siop_script_write(sc, siop_target->reseloff + 1, 1792 sc->sc_c.sc_scriptaddr + 1793 siop_target->lunsw->lunsw_off * 4 + 1794 Ent_lun_switch_entry); 1795 break; 1796 } 1797 } 1798 if (i == 15) /* no free slot, shouldn't happen */ 1799 panic("siop: resel switch full"); 1800 1801 sc->sc_ntargets++; 1802 for (i = 0; i < 8; i++) { 1803 siop_lun = siop_target->siop_lun[i]; 1804 if (siop_lun == NULL) 1805 continue; 1806 if (siop_lun->reseloff > 0) { 1807 siop_lun->reseloff = 0; 1808 for (j = 0; j < SIOP_NTAG; j++) 1809 siop_lun->siop_tag[j].reseloff = 0; 1810 siop_add_dev(sc, target, i); 1811 } 1812 } 1813 siop_update_scntl3(sc, sc->sc_c.targets[target]); 1814 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1815 } 1816 1817 void 1818 siop_update_scntl3(sc, _siop_target) 1819 struct siop_softc *sc; 1820 struct siop_common_target *_siop_target; 1821 { 1822 struct siop_target *siop_target = (struct siop_target *)_siop_target; 1823 /* MOVE target->id >> 24 TO SCNTL3 */ 1824 siop_script_write(sc, 1825 siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4), 1826 0x78030000 | ((siop_target->target_c.id >> 16) & 0x0000ff00)); 1827 /* MOVE target->id >> 8 TO SXFER */ 1828 siop_script_write(sc, 1829 siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4) + 2, 1830 0x78050000 | (siop_target->target_c.id & 0x0000ff00)); 1831 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1832 } 1833 1834 void 1835 siop_add_dev(sc, target, lun) 1836 struct siop_softc *sc; 1837 int target; 1838 int lun; 1839 { 1840 struct siop_lunsw *lunsw; 1841 struct siop_target *siop_target = 1842 (struct siop_target *)sc->sc_c.targets[target]; 1843 struct siop_lun *siop_lun = siop_target->siop_lun[lun]; 1844 int i, ntargets; 1845 1846 if (siop_lun->reseloff > 0) 1847 return; 1848 lunsw = siop_target->lunsw; 1849 if ((lunsw->lunsw_off + lunsw->lunsw_size) < sc->script_free_lo) { 1850 /* 1851 * can't extend this slot. Probably not worth trying to deal 1852 * with this case 1853 */ 1854 #ifdef DEBUG 1855 printf("%s:%d:%d: can't allocate a lun sw slot\n", 1856 sc->sc_c.sc_dev.dv_xname, target, lun); 1857 #endif 1858 return; 1859 } 1860 /* count how many free targets we still have to probe */ 1861 ntargets = sc->sc_c.sc_chan.chan_ntargets - 1 - sc->sc_ntargets; 1862 1863 /* 1864 * we need 8 bytes for the lun sw additional entry, and 1865 * eventually sizeof(tag_switch) for the tag switch entry. 1866 * Keep enough free space for the free targets that could be 1867 * probed later. 1868 */ 1869 if (sc->script_free_lo + 2 + 1870 (ntargets * sizeof(lun_switch) / sizeof(lun_switch[0])) >= 1871 ((siop_target->target_c.flags & TARF_TAG) ? 1872 sc->script_free_hi - (sizeof(tag_switch) / sizeof(tag_switch[0])) : 1873 sc->script_free_hi)) { 1874 /* 1875 * not enough space, probably not worth dealing with it. 1876 * We can hold 13 tagged-queuing capable devices in the 4k RAM. 1877 */ 1878 #ifdef DEBUG 1879 printf("%s:%d:%d: not enough memory for a lun sw slot\n", 1880 sc->sc_c.sc_dev.dv_xname, target, lun); 1881 #endif 1882 return; 1883 } 1884 #ifdef SIOP_DEBUG 1885 printf("%s:%d:%d: allocate lun sw entry\n", 1886 sc->sc_c.sc_dev.dv_xname, target, lun); 1887 #endif 1888 /* INT int_resellun */ 1889 siop_script_write(sc, sc->script_free_lo, 0x98080000); 1890 siop_script_write(sc, sc->script_free_lo + 1, A_int_resellun); 1891 /* Now the slot entry: JUMP abs_foo, IF lun */ 1892 siop_script_write(sc, sc->script_free_lo - 2, 1893 0x800c0000 | lun); 1894 siop_script_write(sc, sc->script_free_lo - 1, 0); 1895 siop_lun->reseloff = sc->script_free_lo - 2; 1896 lunsw->lunsw_size += 2; 1897 sc->script_free_lo += 2; 1898 if (siop_target->target_c.flags & TARF_TAG) { 1899 /* we need a tag switch */ 1900 sc->script_free_hi -= 1901 sizeof(tag_switch) / sizeof(tag_switch[0]); 1902 if (sc->sc_c.features & SF_CHIP_RAM) { 1903 bus_space_write_region_4(sc->sc_c.sc_ramt, 1904 sc->sc_c.sc_ramh, 1905 sc->script_free_hi * 4, tag_switch, 1906 sizeof(tag_switch) / sizeof(tag_switch[0])); 1907 } else { 1908 for(i = 0; 1909 i < sizeof(tag_switch) / sizeof(tag_switch[0]); 1910 i++) { 1911 sc->sc_c.sc_script[sc->script_free_hi + i] = 1912 htole32(tag_switch[i]); 1913 } 1914 } 1915 siop_script_write(sc, 1916 siop_lun->reseloff + 1, 1917 sc->sc_c.sc_scriptaddr + sc->script_free_hi * 4 + 1918 Ent_tag_switch_entry); 1919 1920 for (i = 0; i < SIOP_NTAG; i++) { 1921 siop_lun->siop_tag[i].reseloff = 1922 sc->script_free_hi + (Ent_resel_tag0 / 4) + i * 2; 1923 } 1924 } else { 1925 /* non-tag case; just work with the lun switch */ 1926 siop_lun->siop_tag[0].reseloff = 1927 siop_target->siop_lun[lun]->reseloff; 1928 } 1929 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1930 } 1931 1932 void 1933 siop_del_dev(sc, target, lun) 1934 struct siop_softc *sc; 1935 int target; 1936 int lun; 1937 { 1938 int i; 1939 struct siop_target *siop_target; 1940 #ifdef SIOP_DEBUG 1941 printf("%s:%d:%d: free lun sw entry\n", 1942 sc->sc_c.sc_dev.dv_xname, target, lun); 1943 #endif 1944 if (sc->sc_c.targets[target] == NULL) 1945 return; 1946 siop_target = (struct siop_target *)sc->sc_c.targets[target]; 1947 free(siop_target->siop_lun[lun], M_DEVBUF); 1948 siop_target->siop_lun[lun] = NULL; 1949 /* XXX compact sw entry too ? */ 1950 /* check if we can free the whole target */ 1951 for (i = 0; i < 8; i++) { 1952 if (siop_target->siop_lun[i] != NULL) 1953 return; 1954 } 1955 #ifdef SIOP_DEBUG 1956 printf("%s: free siop_target for target %d lun %d lunsw offset %d\n", 1957 sc->sc_c.sc_dev.dv_xname, target, lun, 1958 sc->sc_c.targets[target]->lunsw->lunsw_off); 1959 #endif 1960 /* 1961 * nothing here, free the target struct and resel 1962 * switch entry 1963 */ 1964 siop_script_write(sc, siop_target->reseloff, 0x800c00ff); 1965 siop_script_sync(sc, BUS_DMASYNC_PREWRITE); 1966 TAILQ_INSERT_TAIL(&sc->lunsw_list, siop_target->lunsw, next); 1967 free(sc->sc_c.targets[target], M_DEVBUF); 1968 sc->sc_c.targets[target] = NULL; 1969 sc->sc_ntargets--; 1970 } 1971 1972 #ifdef SIOP_STATS 1973 void 1974 siop_printstats() 1975 { 1976 printf("siop_stat_intr %d\n", siop_stat_intr); 1977 printf("siop_stat_intr_shortxfer %d\n", siop_stat_intr_shortxfer); 1978 printf("siop_stat_intr_xferdisc %d\n", siop_stat_intr_xferdisc); 1979 printf("siop_stat_intr_sdp %d\n", siop_stat_intr_sdp); 1980 printf("siop_stat_intr_done %d\n", siop_stat_intr_done); 1981 printf("siop_stat_intr_lunresel %d\n", siop_stat_intr_lunresel); 1982 printf("siop_stat_intr_qfull %d\n", siop_stat_intr_qfull); 1983 } 1984 #endif
Cache object: 5ab3bbb4c94efc8f98edda224c2f13b7
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