1 /*- 2 * Core routines and tables shareable across OS platforms. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 1994-2002 Justin T. Gibbs. 7 * Copyright (c) 2000-2002 Adaptec Inc. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions, and the following disclaimer, 15 * without modification. 16 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 17 * substantially similar to the "NO WARRANTY" disclaimer below 18 * ("Disclaimer") and any redistribution must be conditioned upon 19 * including a substantially similar Disclaimer requirement for further 20 * binary redistribution. 21 * 3. Neither the names of the above-listed copyright holders nor the names 22 * of any contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * Alternatively, this software may be distributed under the terms of the 26 * GNU General Public License ("GPL") version 2 as published by the Free 27 * Software Foundation. 28 * 29 * NO WARRANTY 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 33 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 34 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 38 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 39 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 40 * POSSIBILITY OF SUCH DAMAGES. 41 * 42 * $Id: //depot/aic7xxx/aic7xxx/aic7xxx.c#155 $ 43 */ 44 45 #include <dev/aic7xxx/aic7xxx_osm.h> 46 #include <dev/aic7xxx/aic7xxx_inline.h> 47 #include <dev/aic7xxx/aicasm/aicasm_insformat.h> 48 49 /****************************** Softc Data ************************************/ 50 struct ahc_softc_tailq ahc_tailq = TAILQ_HEAD_INITIALIZER(ahc_tailq); 51 52 /***************************** Lookup Tables **********************************/ 53 char *ahc_chip_names[] = 54 { 55 "NONE", 56 "aic7770", 57 "aic7850", 58 "aic7855", 59 "aic7859", 60 "aic7860", 61 "aic7870", 62 "aic7880", 63 "aic7895", 64 "aic7895C", 65 "aic7890/91", 66 "aic7896/97", 67 "aic7892", 68 "aic7899" 69 }; 70 71 /* 72 * Hardware error codes. 73 */ 74 struct ahc_hard_error_entry { 75 uint8_t errno; 76 char *errmesg; 77 }; 78 79 static struct ahc_hard_error_entry ahc_hard_errors[] = { 80 { ILLHADDR, "Illegal Host Access" }, 81 { ILLSADDR, "Illegal Sequencer Address referrenced" }, 82 { ILLOPCODE, "Illegal Opcode in sequencer program" }, 83 { SQPARERR, "Sequencer Parity Error" }, 84 { DPARERR, "Data-path Parity Error" }, 85 { MPARERR, "Scratch or SCB Memory Parity Error" }, 86 { PCIERRSTAT, "PCI Error detected" }, 87 { CIOPARERR, "CIOBUS Parity Error" }, 88 }; 89 static const u_int num_errors = NUM_ELEMENTS(ahc_hard_errors); 90 91 static struct ahc_phase_table_entry ahc_phase_table[] = 92 { 93 { P_DATAOUT, MSG_NOOP, "in Data-out phase" }, 94 { P_DATAIN, MSG_INITIATOR_DET_ERR, "in Data-in phase" }, 95 { P_DATAOUT_DT, MSG_NOOP, "in DT Data-out phase" }, 96 { P_DATAIN_DT, MSG_INITIATOR_DET_ERR, "in DT Data-in phase" }, 97 { P_COMMAND, MSG_NOOP, "in Command phase" }, 98 { P_MESGOUT, MSG_NOOP, "in Message-out phase" }, 99 { P_STATUS, MSG_INITIATOR_DET_ERR, "in Status phase" }, 100 { P_MESGIN, MSG_PARITY_ERROR, "in Message-in phase" }, 101 { P_BUSFREE, MSG_NOOP, "while idle" }, 102 { 0, MSG_NOOP, "in unknown phase" } 103 }; 104 105 /* 106 * In most cases we only wish to itterate over real phases, so 107 * exclude the last element from the count. 108 */ 109 static const u_int num_phases = NUM_ELEMENTS(ahc_phase_table) - 1; 110 111 /* 112 * Valid SCSIRATE values. (p. 3-17) 113 * Provides a mapping of transfer periods in ns to the proper value to 114 * stick in the scsixfer reg. 115 */ 116 static struct ahc_syncrate ahc_syncrates[] = 117 { 118 /* ultra2 fast/ultra period rate */ 119 { 0x42, 0x000, 9, "80.0" }, 120 { 0x03, 0x000, 10, "40.0" }, 121 { 0x04, 0x000, 11, "33.0" }, 122 { 0x05, 0x100, 12, "20.0" }, 123 { 0x06, 0x110, 15, "16.0" }, 124 { 0x07, 0x120, 18, "13.4" }, 125 { 0x08, 0x000, 25, "10.0" }, 126 { 0x19, 0x010, 31, "8.0" }, 127 { 0x1a, 0x020, 37, "6.67" }, 128 { 0x1b, 0x030, 43, "5.7" }, 129 { 0x1c, 0x040, 50, "5.0" }, 130 { 0x00, 0x050, 56, "4.4" }, 131 { 0x00, 0x060, 62, "4.0" }, 132 { 0x00, 0x070, 68, "3.6" }, 133 { 0x00, 0x000, 0, NULL } 134 }; 135 136 /* Our Sequencer Program */ 137 #include "aic7xxx_seq.h" 138 139 /**************************** Function Declarations ***************************/ 140 static void ahc_force_renegotiation(struct ahc_softc *ahc, 141 struct ahc_devinfo *devinfo); 142 static struct ahc_tmode_tstate* 143 ahc_alloc_tstate(struct ahc_softc *ahc, 144 u_int scsi_id, char channel); 145 #ifdef AHC_TARGET_MODE 146 static void ahc_free_tstate(struct ahc_softc *ahc, 147 u_int scsi_id, char channel, int force); 148 #endif 149 static struct ahc_syncrate* 150 ahc_devlimited_syncrate(struct ahc_softc *ahc, 151 struct ahc_initiator_tinfo *, 152 u_int *period, 153 u_int *ppr_options, 154 role_t role); 155 static void ahc_update_pending_scbs(struct ahc_softc *ahc); 156 static void ahc_fetch_devinfo(struct ahc_softc *ahc, 157 struct ahc_devinfo *devinfo); 158 static void ahc_scb_devinfo(struct ahc_softc *ahc, 159 struct ahc_devinfo *devinfo, 160 struct scb *scb); 161 static void ahc_assert_atn(struct ahc_softc *ahc); 162 static void ahc_setup_initiator_msgout(struct ahc_softc *ahc, 163 struct ahc_devinfo *devinfo, 164 struct scb *scb); 165 static void ahc_build_transfer_msg(struct ahc_softc *ahc, 166 struct ahc_devinfo *devinfo); 167 static void ahc_construct_sdtr(struct ahc_softc *ahc, 168 struct ahc_devinfo *devinfo, 169 u_int period, u_int offset); 170 static void ahc_construct_wdtr(struct ahc_softc *ahc, 171 struct ahc_devinfo *devinfo, 172 u_int bus_width); 173 static void ahc_construct_ppr(struct ahc_softc *ahc, 174 struct ahc_devinfo *devinfo, 175 u_int period, u_int offset, 176 u_int bus_width, u_int ppr_options); 177 static void ahc_clear_msg_state(struct ahc_softc *ahc); 178 static void ahc_handle_proto_violation(struct ahc_softc *ahc); 179 static void ahc_handle_message_phase(struct ahc_softc *ahc); 180 typedef enum { 181 AHCMSG_1B, 182 AHCMSG_2B, 183 AHCMSG_EXT 184 } ahc_msgtype; 185 static int ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, 186 u_int msgval, int full); 187 static int ahc_parse_msg(struct ahc_softc *ahc, 188 struct ahc_devinfo *devinfo); 189 static int ahc_handle_msg_reject(struct ahc_softc *ahc, 190 struct ahc_devinfo *devinfo); 191 static void ahc_handle_ign_wide_residue(struct ahc_softc *ahc, 192 struct ahc_devinfo *devinfo); 193 static void ahc_reinitialize_dataptrs(struct ahc_softc *ahc); 194 static void ahc_handle_devreset(struct ahc_softc *ahc, 195 struct ahc_devinfo *devinfo, 196 cam_status status, char *message, 197 int verbose_level); 198 #ifdef AHC_TARGET_MODE 199 static void ahc_setup_target_msgin(struct ahc_softc *ahc, 200 struct ahc_devinfo *devinfo, 201 struct scb *scb); 202 #endif 203 204 static bus_dmamap_callback_t ahc_dmamap_cb; 205 static void ahc_build_free_scb_list(struct ahc_softc *ahc); 206 static int ahc_init_scbdata(struct ahc_softc *ahc); 207 static void ahc_fini_scbdata(struct ahc_softc *ahc); 208 static void ahc_qinfifo_requeue(struct ahc_softc *ahc, 209 struct scb *prev_scb, 210 struct scb *scb); 211 static int ahc_qinfifo_count(struct ahc_softc *ahc); 212 static u_int ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, 213 u_int prev, u_int scbptr); 214 static void ahc_add_curscb_to_free_list(struct ahc_softc *ahc); 215 static u_int ahc_rem_wscb(struct ahc_softc *ahc, 216 u_int scbpos, u_int prev); 217 static void ahc_reset_current_bus(struct ahc_softc *ahc); 218 #ifdef AHC_DUMP_SEQ 219 static void ahc_dumpseq(struct ahc_softc *ahc); 220 #endif 221 static int ahc_loadseq(struct ahc_softc *ahc); 222 static int ahc_check_patch(struct ahc_softc *ahc, 223 struct patch **start_patch, 224 u_int start_instr, u_int *skip_addr); 225 static void ahc_download_instr(struct ahc_softc *ahc, 226 u_int instrptr, uint8_t *dconsts); 227 static int ahc_other_scb_timeout(struct ahc_softc *ahc, 228 struct scb *scb, 229 struct scb *other_scb); 230 #ifdef AHC_TARGET_MODE 231 static void ahc_queue_lstate_event(struct ahc_softc *ahc, 232 struct ahc_tmode_lstate *lstate, 233 u_int initiator_id, 234 u_int event_type, 235 u_int event_arg); 236 static void ahc_update_scsiid(struct ahc_softc *ahc, 237 u_int targid_mask); 238 static int ahc_handle_target_cmd(struct ahc_softc *ahc, 239 struct target_cmd *cmd); 240 #endif 241 /************************* Sequencer Execution Control ************************/ 242 /* 243 * Restart the sequencer program from address zero 244 */ 245 void 246 ahc_restart(struct ahc_softc *ahc) 247 { 248 249 ahc_pause(ahc); 250 251 /* No more pending messages. */ 252 ahc_clear_msg_state(ahc); 253 254 ahc_outb(ahc, SCSISIGO, 0); /* De-assert BSY */ 255 ahc_outb(ahc, MSG_OUT, MSG_NOOP); /* No message to send */ 256 ahc_outb(ahc, SXFRCTL1, ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET); 257 ahc_outb(ahc, LASTPHASE, P_BUSFREE); 258 ahc_outb(ahc, SAVED_SCSIID, 0xFF); 259 ahc_outb(ahc, SAVED_LUN, 0xFF); 260 261 /* 262 * Ensure that the sequencer's idea of TQINPOS 263 * matches our own. The sequencer increments TQINPOS 264 * only after it sees a DMA complete and a reset could 265 * occur before the increment leaving the kernel to believe 266 * the command arrived but the sequencer to not. 267 */ 268 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext); 269 270 /* Always allow reselection */ 271 ahc_outb(ahc, SCSISEQ, 272 ahc_inb(ahc, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP)); 273 if ((ahc->features & AHC_CMD_CHAN) != 0) { 274 /* Ensure that no DMA operations are in progress */ 275 ahc_outb(ahc, CCSCBCNT, 0); 276 ahc_outb(ahc, CCSGCTL, 0); 277 ahc_outb(ahc, CCSCBCTL, 0); 278 } 279 /* 280 * If we were in the process of DMA'ing SCB data into 281 * an SCB, replace that SCB on the free list. This prevents 282 * an SCB leak. 283 */ 284 if ((ahc_inb(ahc, SEQ_FLAGS2) & SCB_DMA) != 0) { 285 ahc_add_curscb_to_free_list(ahc); 286 ahc_outb(ahc, SEQ_FLAGS2, 287 ahc_inb(ahc, SEQ_FLAGS2) & ~SCB_DMA); 288 } 289 290 /* 291 * Clear any pending sequencer interrupt. It is no 292 * longer relevant since we're resetting the Program 293 * Counter. 294 */ 295 ahc_outb(ahc, CLRINT, CLRSEQINT); 296 297 ahc_outb(ahc, MWI_RESIDUAL, 0); 298 ahc_outb(ahc, SEQCTL, ahc->seqctl); 299 ahc_outb(ahc, SEQADDR0, 0); 300 ahc_outb(ahc, SEQADDR1, 0); 301 302 ahc_unpause(ahc); 303 } 304 305 /************************* Input/Output Queues ********************************/ 306 void 307 ahc_run_qoutfifo(struct ahc_softc *ahc) 308 { 309 struct scb *scb; 310 u_int scb_index; 311 312 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD); 313 while (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) { 314 scb_index = ahc->qoutfifo[ahc->qoutfifonext]; 315 if ((ahc->qoutfifonext & 0x03) == 0x03) { 316 u_int modnext; 317 318 /* 319 * Clear 32bits of QOUTFIFO at a time 320 * so that we don't clobber an incoming 321 * byte DMA to the array on architectures 322 * that only support 32bit load and store 323 * operations. 324 */ 325 modnext = ahc->qoutfifonext & ~0x3; 326 *((uint32_t *)(&ahc->qoutfifo[modnext])) = 0xFFFFFFFFUL; 327 aic_dmamap_sync(ahc, ahc->shared_data_dmat, 328 ahc->shared_data_dmamap, 329 /*offset*/modnext, /*len*/4, 330 BUS_DMASYNC_PREREAD); 331 } 332 ahc->qoutfifonext++; 333 334 scb = ahc_lookup_scb(ahc, scb_index); 335 if (scb == NULL) { 336 printf("%s: WARNING no command for scb %d " 337 "(cmdcmplt)\nQOUTPOS = %d\n", 338 ahc_name(ahc), scb_index, 339 (ahc->qoutfifonext - 1) & 0xFF); 340 continue; 341 } 342 343 /* 344 * Save off the residual 345 * if there is one. 346 */ 347 ahc_update_residual(ahc, scb); 348 ahc_done(ahc, scb); 349 } 350 } 351 352 void 353 ahc_run_untagged_queues(struct ahc_softc *ahc) 354 { 355 int i; 356 357 for (i = 0; i < 16; i++) 358 ahc_run_untagged_queue(ahc, &ahc->untagged_queues[i]); 359 } 360 361 void 362 ahc_run_untagged_queue(struct ahc_softc *ahc, struct scb_tailq *queue) 363 { 364 struct scb *scb; 365 366 if (ahc->untagged_queue_lock != 0) 367 return; 368 369 if ((scb = TAILQ_FIRST(queue)) != NULL 370 && (scb->flags & SCB_ACTIVE) == 0) { 371 scb->flags |= SCB_ACTIVE; 372 /* 373 * Timers are disabled while recovery is in progress. 374 */ 375 aic_scb_timer_start(scb); 376 ahc_queue_scb(ahc, scb); 377 } 378 } 379 380 /************************* Interrupt Handling *********************************/ 381 void 382 ahc_handle_brkadrint(struct ahc_softc *ahc) 383 { 384 /* 385 * We upset the sequencer :-( 386 * Lookup the error message 387 */ 388 int i; 389 int error; 390 391 error = ahc_inb(ahc, ERROR); 392 for (i = 0; error != 1 && i < num_errors; i++) 393 error >>= 1; 394 printf("%s: brkadrint, %s at seqaddr = 0x%x\n", 395 ahc_name(ahc), ahc_hard_errors[i].errmesg, 396 ahc_inb(ahc, SEQADDR0) | 397 (ahc_inb(ahc, SEQADDR1) << 8)); 398 399 ahc_dump_card_state(ahc); 400 401 /* Tell everyone that this HBA is no longer available */ 402 ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 403 CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN, 404 CAM_NO_HBA); 405 406 /* Disable all interrupt sources by resetting the controller */ 407 ahc_shutdown(ahc); 408 } 409 410 void 411 ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat) 412 { 413 struct scb *scb; 414 struct ahc_devinfo devinfo; 415 416 ahc_fetch_devinfo(ahc, &devinfo); 417 418 /* 419 * Clear the upper byte that holds SEQINT status 420 * codes and clear the SEQINT bit. We will unpause 421 * the sequencer, if appropriate, after servicing 422 * the request. 423 */ 424 ahc_outb(ahc, CLRINT, CLRSEQINT); 425 switch (intstat & SEQINT_MASK) { 426 case BAD_STATUS: 427 { 428 u_int scb_index; 429 struct hardware_scb *hscb; 430 431 /* 432 * Set the default return value to 0 (don't 433 * send sense). The sense code will change 434 * this if needed. 435 */ 436 ahc_outb(ahc, RETURN_1, 0); 437 438 /* 439 * The sequencer will notify us when a command 440 * has an error that would be of interest to 441 * the kernel. This allows us to leave the sequencer 442 * running in the common case of command completes 443 * without error. The sequencer will already have 444 * dma'd the SCB back up to us, so we can reference 445 * the in kernel copy directly. 446 */ 447 scb_index = ahc_inb(ahc, SCB_TAG); 448 scb = ahc_lookup_scb(ahc, scb_index); 449 if (scb == NULL) { 450 ahc_print_devinfo(ahc, &devinfo); 451 printf("ahc_intr - referenced scb " 452 "not valid during seqint 0x%x scb(%d)\n", 453 intstat, scb_index); 454 ahc_dump_card_state(ahc); 455 panic("for safety"); 456 goto unpause; 457 } 458 459 hscb = scb->hscb; 460 461 /* Don't want to clobber the original sense code */ 462 if ((scb->flags & SCB_SENSE) != 0) { 463 /* 464 * Clear the SCB_SENSE Flag and have 465 * the sequencer do a normal command 466 * complete. 467 */ 468 scb->flags &= ~SCB_SENSE; 469 aic_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); 470 break; 471 } 472 aic_set_transaction_status(scb, CAM_SCSI_STATUS_ERROR); 473 /* Freeze the queue until the client sees the error. */ 474 ahc_freeze_devq(ahc, scb); 475 aic_freeze_scb(scb); 476 aic_set_scsi_status(scb, hscb->shared_data.status.scsi_status); 477 switch (hscb->shared_data.status.scsi_status) { 478 case SCSI_STATUS_OK: 479 printf("%s: Interrupted for staus of 0???\n", 480 ahc_name(ahc)); 481 break; 482 case SCSI_STATUS_CMD_TERMINATED: 483 case SCSI_STATUS_CHECK_COND: 484 { 485 struct ahc_dma_seg *sg; 486 struct scsi_sense *sc; 487 struct ahc_initiator_tinfo *targ_info; 488 struct ahc_tmode_tstate *tstate; 489 struct ahc_transinfo *tinfo; 490 #ifdef AHC_DEBUG 491 if (ahc_debug & AHC_SHOW_SENSE) { 492 ahc_print_path(ahc, scb); 493 printf("SCB %d: requests Check Status\n", 494 scb->hscb->tag); 495 } 496 #endif 497 498 if (aic_perform_autosense(scb) == 0) 499 break; 500 501 targ_info = ahc_fetch_transinfo(ahc, 502 devinfo.channel, 503 devinfo.our_scsiid, 504 devinfo.target, 505 &tstate); 506 tinfo = &targ_info->curr; 507 sg = scb->sg_list; 508 sc = (struct scsi_sense *)(&hscb->shared_data.cdb); 509 /* 510 * Save off the residual if there is one. 511 */ 512 ahc_update_residual(ahc, scb); 513 #ifdef AHC_DEBUG 514 if (ahc_debug & AHC_SHOW_SENSE) { 515 ahc_print_path(ahc, scb); 516 printf("Sending Sense\n"); 517 } 518 #endif 519 sg->addr = ahc_get_sense_bufaddr(ahc, scb); 520 sg->len = aic_get_sense_bufsize(ahc, scb); 521 sg->len |= AHC_DMA_LAST_SEG; 522 523 /* Fixup byte order */ 524 sg->addr = aic_htole32(sg->addr); 525 sg->len = aic_htole32(sg->len); 526 527 sc->opcode = REQUEST_SENSE; 528 sc->byte2 = 0; 529 if (tinfo->protocol_version <= SCSI_REV_2 530 && SCB_GET_LUN(scb) < 8) 531 sc->byte2 = SCB_GET_LUN(scb) << 5; 532 sc->unused[0] = 0; 533 sc->unused[1] = 0; 534 sc->length = sg->len; 535 sc->control = 0; 536 537 /* 538 * We can't allow the target to disconnect. 539 * This will be an untagged transaction and 540 * having the target disconnect will make this 541 * transaction indestinguishable from outstanding 542 * tagged transactions. 543 */ 544 hscb->control = 0; 545 546 /* 547 * This request sense could be because the 548 * the device lost power or in some other 549 * way has lost our transfer negotiations. 550 * Renegotiate if appropriate. Unit attention 551 * errors will be reported before any data 552 * phases occur. 553 */ 554 if (aic_get_residual(scb) 555 == aic_get_transfer_length(scb)) { 556 ahc_update_neg_request(ahc, &devinfo, 557 tstate, targ_info, 558 AHC_NEG_IF_NON_ASYNC); 559 } 560 if (tstate->auto_negotiate & devinfo.target_mask) { 561 hscb->control |= MK_MESSAGE; 562 scb->flags &= ~SCB_NEGOTIATE; 563 scb->flags |= SCB_AUTO_NEGOTIATE; 564 } 565 hscb->cdb_len = sizeof(*sc); 566 hscb->dataptr = sg->addr; 567 hscb->datacnt = sg->len; 568 hscb->sgptr = scb->sg_list_phys | SG_FULL_RESID; 569 hscb->sgptr = aic_htole32(hscb->sgptr); 570 scb->sg_count = 1; 571 scb->flags |= SCB_SENSE; 572 ahc_qinfifo_requeue_tail(ahc, scb); 573 ahc_outb(ahc, RETURN_1, SEND_SENSE); 574 /* 575 * Ensure we have enough time to actually 576 * retrieve the sense, but only schedule 577 * the timer if we are not in recovery or 578 * this is a recovery SCB that is allowed 579 * to have an active timer. 580 */ 581 if (ahc->scb_data->recovery_scbs == 0 582 || (scb->flags & SCB_RECOVERY_SCB) != 0) 583 aic_scb_timer_reset(scb, 5 * 1000); 584 break; 585 } 586 default: 587 break; 588 } 589 break; 590 } 591 case NO_MATCH: 592 { 593 /* Ensure we don't leave the selection hardware on */ 594 ahc_outb(ahc, SCSISEQ, 595 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); 596 597 printf("%s:%c:%d: no active SCB for reconnecting " 598 "target - issuing BUS DEVICE RESET\n", 599 ahc_name(ahc), devinfo.channel, devinfo.target); 600 printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, " 601 "ARG_1 == 0x%x ACCUM = 0x%x\n", 602 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN), 603 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM)); 604 printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, " 605 "SINDEX == 0x%x\n", 606 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR), 607 ahc_index_busy_tcl(ahc, 608 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID), 609 ahc_inb(ahc, SAVED_LUN))), 610 ahc_inb(ahc, SINDEX)); 611 printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, " 612 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n", 613 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID), 614 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG), 615 ahc_inb(ahc, SCB_CONTROL)); 616 printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n", 617 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI)); 618 printf("SXFRCTL0 == 0x%x\n", ahc_inb(ahc, SXFRCTL0)); 619 printf("SEQCTL == 0x%x\n", ahc_inb(ahc, SEQCTL)); 620 ahc_dump_card_state(ahc); 621 ahc->msgout_buf[0] = MSG_BUS_DEV_RESET; 622 ahc->msgout_len = 1; 623 ahc->msgout_index = 0; 624 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 625 ahc_outb(ahc, MSG_OUT, HOST_MSG); 626 ahc_assert_atn(ahc); 627 break; 628 } 629 case SEND_REJECT: 630 { 631 u_int rejbyte = ahc_inb(ahc, ACCUM); 632 printf("%s:%c:%d: Warning - unknown message received from " 633 "target (0x%x). Rejecting\n", 634 ahc_name(ahc), devinfo.channel, devinfo.target, rejbyte); 635 break; 636 } 637 case PROTO_VIOLATION: 638 { 639 ahc_handle_proto_violation(ahc); 640 break; 641 } 642 case IGN_WIDE_RES: 643 ahc_handle_ign_wide_residue(ahc, &devinfo); 644 break; 645 case PDATA_REINIT: 646 ahc_reinitialize_dataptrs(ahc); 647 break; 648 case BAD_PHASE: 649 { 650 u_int lastphase; 651 652 lastphase = ahc_inb(ahc, LASTPHASE); 653 printf("%s:%c:%d: unknown scsi bus phase %x, " 654 "lastphase = 0x%x. Attempting to continue\n", 655 ahc_name(ahc), devinfo.channel, devinfo.target, 656 lastphase, ahc_inb(ahc, SCSISIGI)); 657 break; 658 } 659 case MISSED_BUSFREE: 660 { 661 u_int lastphase; 662 663 lastphase = ahc_inb(ahc, LASTPHASE); 664 printf("%s:%c:%d: Missed busfree. " 665 "Lastphase = 0x%x, Curphase = 0x%x\n", 666 ahc_name(ahc), devinfo.channel, devinfo.target, 667 lastphase, ahc_inb(ahc, SCSISIGI)); 668 ahc_restart(ahc); 669 return; 670 } 671 case HOST_MSG_LOOP: 672 { 673 /* 674 * The sequencer has encountered a message phase 675 * that requires host assistance for completion. 676 * While handling the message phase(s), we will be 677 * notified by the sequencer after each byte is 678 * transferred so we can track bus phase changes. 679 * 680 * If this is the first time we've seen a HOST_MSG_LOOP 681 * interrupt, initialize the state of the host message 682 * loop. 683 */ 684 if (ahc->msg_type == MSG_TYPE_NONE) { 685 struct scb *scb; 686 u_int scb_index; 687 u_int bus_phase; 688 689 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 690 if (bus_phase != P_MESGIN 691 && bus_phase != P_MESGOUT) { 692 printf("ahc_intr: HOST_MSG_LOOP bad " 693 "phase 0x%x\n", 694 bus_phase); 695 /* 696 * Probably transitioned to bus free before 697 * we got here. Just punt the message. 698 */ 699 ahc_clear_intstat(ahc); 700 ahc_restart(ahc); 701 return; 702 } 703 704 scb_index = ahc_inb(ahc, SCB_TAG); 705 scb = ahc_lookup_scb(ahc, scb_index); 706 if (devinfo.role == ROLE_INITIATOR) { 707 if (scb == NULL) 708 panic("HOST_MSG_LOOP with " 709 "invalid SCB %x\n", scb_index); 710 711 if (bus_phase == P_MESGOUT) 712 ahc_setup_initiator_msgout(ahc, 713 &devinfo, 714 scb); 715 else { 716 ahc->msg_type = 717 MSG_TYPE_INITIATOR_MSGIN; 718 ahc->msgin_index = 0; 719 } 720 } 721 #ifdef AHC_TARGET_MODE 722 else { 723 if (bus_phase == P_MESGOUT) { 724 ahc->msg_type = 725 MSG_TYPE_TARGET_MSGOUT; 726 ahc->msgin_index = 0; 727 } 728 else 729 ahc_setup_target_msgin(ahc, 730 &devinfo, 731 scb); 732 } 733 #endif 734 } 735 736 ahc_handle_message_phase(ahc); 737 break; 738 } 739 case PERR_DETECTED: 740 { 741 /* 742 * If we've cleared the parity error interrupt 743 * but the sequencer still believes that SCSIPERR 744 * is true, it must be that the parity error is 745 * for the currently presented byte on the bus, 746 * and we are not in a phase (data-in) where we will 747 * eventually ack this byte. Ack the byte and 748 * throw it away in the hope that the target will 749 * take us to message out to deliver the appropriate 750 * error message. 751 */ 752 if ((intstat & SCSIINT) == 0 753 && (ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0) { 754 if ((ahc->features & AHC_DT) == 0) { 755 u_int curphase; 756 757 /* 758 * The hardware will only let you ack bytes 759 * if the expected phase in SCSISIGO matches 760 * the current phase. Make sure this is 761 * currently the case. 762 */ 763 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 764 ahc_outb(ahc, LASTPHASE, curphase); 765 ahc_outb(ahc, SCSISIGO, curphase); 766 } 767 if ((ahc_inb(ahc, SCSISIGI) & (CDI|MSGI)) == 0) { 768 int wait; 769 770 /* 771 * In a data phase. Faster to bitbucket 772 * the data than to individually ack each 773 * byte. This is also the only strategy 774 * that will work with AUTOACK enabled. 775 */ 776 ahc_outb(ahc, SXFRCTL1, 777 ahc_inb(ahc, SXFRCTL1) | BITBUCKET); 778 wait = 5000; 779 while (--wait != 0) { 780 if ((ahc_inb(ahc, SCSISIGI) 781 & (CDI|MSGI)) != 0) 782 break; 783 aic_delay(100); 784 } 785 ahc_outb(ahc, SXFRCTL1, 786 ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET); 787 if (wait == 0) { 788 struct scb *scb; 789 u_int scb_index; 790 791 ahc_print_devinfo(ahc, &devinfo); 792 printf("Unable to clear parity error. " 793 "Resetting bus.\n"); 794 scb_index = ahc_inb(ahc, SCB_TAG); 795 scb = ahc_lookup_scb(ahc, scb_index); 796 if (scb != NULL) 797 aic_set_transaction_status(scb, 798 CAM_UNCOR_PARITY); 799 ahc_reset_channel(ahc, devinfo.channel, 800 /*init reset*/TRUE); 801 } 802 } else { 803 ahc_inb(ahc, SCSIDATL); 804 } 805 } 806 break; 807 } 808 case DATA_OVERRUN: 809 { 810 /* 811 * When the sequencer detects an overrun, it 812 * places the controller in "BITBUCKET" mode 813 * and allows the target to complete its transfer. 814 * Unfortunately, none of the counters get updated 815 * when the controller is in this mode, so we have 816 * no way of knowing how large the overrun was. 817 */ 818 u_int scbindex = ahc_inb(ahc, SCB_TAG); 819 u_int lastphase = ahc_inb(ahc, LASTPHASE); 820 u_int i; 821 822 scb = ahc_lookup_scb(ahc, scbindex); 823 for (i = 0; i < num_phases; i++) { 824 if (lastphase == ahc_phase_table[i].phase) 825 break; 826 } 827 ahc_print_path(ahc, scb); 828 printf("data overrun detected %s." 829 " Tag == 0x%x.\n", 830 ahc_phase_table[i].phasemsg, 831 scb->hscb->tag); 832 ahc_print_path(ahc, scb); 833 printf("%s seen Data Phase. Length = %ld. NumSGs = %d.\n", 834 ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't", 835 aic_get_transfer_length(scb), scb->sg_count); 836 if (scb->sg_count > 0) { 837 for (i = 0; i < scb->sg_count; i++) { 838 printf("sg[%d] - Addr 0x%x%x : Length %d\n", 839 i, 840 (aic_le32toh(scb->sg_list[i].len) >> 24 841 & SG_HIGH_ADDR_BITS), 842 aic_le32toh(scb->sg_list[i].addr), 843 aic_le32toh(scb->sg_list[i].len) 844 & AHC_SG_LEN_MASK); 845 } 846 } 847 /* 848 * Set this and it will take effect when the 849 * target does a command complete. 850 */ 851 ahc_freeze_devq(ahc, scb); 852 if ((scb->flags & SCB_SENSE) == 0) { 853 aic_set_transaction_status(scb, CAM_DATA_RUN_ERR); 854 } else { 855 scb->flags &= ~SCB_SENSE; 856 aic_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); 857 } 858 aic_freeze_scb(scb); 859 860 if ((ahc->features & AHC_ULTRA2) != 0) { 861 /* 862 * Clear the channel in case we return 863 * to data phase later. 864 */ 865 ahc_outb(ahc, SXFRCTL0, 866 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN); 867 ahc_outb(ahc, SXFRCTL0, 868 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN); 869 } 870 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) { 871 u_int dscommand1; 872 873 /* Ensure HHADDR is 0 for future DMA operations. */ 874 dscommand1 = ahc_inb(ahc, DSCOMMAND1); 875 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0); 876 ahc_outb(ahc, HADDR, 0); 877 ahc_outb(ahc, DSCOMMAND1, dscommand1); 878 } 879 break; 880 } 881 case MKMSG_FAILED: 882 { 883 u_int scbindex; 884 885 printf("%s:%c:%d:%d: Attempt to issue message failed\n", 886 ahc_name(ahc), devinfo.channel, devinfo.target, 887 devinfo.lun); 888 scbindex = ahc_inb(ahc, SCB_TAG); 889 scb = ahc_lookup_scb(ahc, scbindex); 890 if (scb != NULL 891 && (scb->flags & SCB_RECOVERY_SCB) != 0) 892 /* 893 * Ensure that we didn't put a second instance of this 894 * SCB into the QINFIFO. 895 */ 896 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb), 897 SCB_GET_CHANNEL(ahc, scb), 898 SCB_GET_LUN(scb), scb->hscb->tag, 899 ROLE_INITIATOR, /*status*/0, 900 SEARCH_REMOVE); 901 break; 902 } 903 case NO_FREE_SCB: 904 { 905 printf("%s: No free or disconnected SCBs\n", ahc_name(ahc)); 906 ahc_dump_card_state(ahc); 907 panic("for safety"); 908 break; 909 } 910 case SCB_MISMATCH: 911 { 912 u_int scbptr; 913 914 scbptr = ahc_inb(ahc, SCBPTR); 915 printf("Bogus TAG after DMA. SCBPTR %d, tag %d, our tag %d\n", 916 scbptr, ahc_inb(ahc, ARG_1), 917 ahc->scb_data->hscbs[scbptr].tag); 918 ahc_dump_card_state(ahc); 919 panic("for safety"); 920 break; 921 } 922 case OUT_OF_RANGE: 923 { 924 printf("%s: BTT calculation out of range\n", ahc_name(ahc)); 925 printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, " 926 "ARG_1 == 0x%x ACCUM = 0x%x\n", 927 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN), 928 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM)); 929 printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, " 930 "SINDEX == 0x%x\n, A == 0x%x\n", 931 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR), 932 ahc_index_busy_tcl(ahc, 933 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID), 934 ahc_inb(ahc, SAVED_LUN))), 935 ahc_inb(ahc, SINDEX), 936 ahc_inb(ahc, ACCUM)); 937 printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, " 938 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n", 939 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID), 940 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG), 941 ahc_inb(ahc, SCB_CONTROL)); 942 printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n", 943 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI)); 944 ahc_dump_card_state(ahc); 945 panic("for safety"); 946 break; 947 } 948 default: 949 printf("ahc_intr: seqint, " 950 "intstat == 0x%x, scsisigi = 0x%x\n", 951 intstat, ahc_inb(ahc, SCSISIGI)); 952 break; 953 } 954 unpause: 955 /* 956 * The sequencer is paused immediately on 957 * a SEQINT, so we should restart it when 958 * we're done. 959 */ 960 ahc_unpause(ahc); 961 } 962 963 void 964 ahc_handle_scsiint(struct ahc_softc *ahc, u_int intstat) 965 { 966 u_int scb_index; 967 u_int status0; 968 u_int status; 969 struct scb *scb; 970 char cur_channel; 971 char intr_channel; 972 973 if ((ahc->features & AHC_TWIN) != 0 974 && ((ahc_inb(ahc, SBLKCTL) & SELBUSB) != 0)) 975 cur_channel = 'B'; 976 else 977 cur_channel = 'A'; 978 intr_channel = cur_channel; 979 980 if ((ahc->features & AHC_ULTRA2) != 0) 981 status0 = ahc_inb(ahc, SSTAT0) & IOERR; 982 else 983 status0 = 0; 984 status = ahc_inb(ahc, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR); 985 if (status == 0 && status0 == 0) { 986 if ((ahc->features & AHC_TWIN) != 0) { 987 /* Try the other channel */ 988 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB); 989 status = ahc_inb(ahc, SSTAT1) 990 & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR); 991 intr_channel = (cur_channel == 'A') ? 'B' : 'A'; 992 } 993 if (status == 0) { 994 printf("%s: Spurious SCSI interrupt\n", ahc_name(ahc)); 995 ahc_outb(ahc, CLRINT, CLRSCSIINT); 996 ahc_unpause(ahc); 997 return; 998 } 999 } 1000 1001 /* Make sure the sequencer is in a safe location. */ 1002 ahc_clear_critical_section(ahc); 1003 1004 scb_index = ahc_inb(ahc, SCB_TAG); 1005 scb = ahc_lookup_scb(ahc, scb_index); 1006 if (scb != NULL 1007 && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) != 0) 1008 scb = NULL; 1009 1010 if ((ahc->features & AHC_ULTRA2) != 0 1011 && (status0 & IOERR) != 0) { 1012 int now_lvd; 1013 1014 now_lvd = ahc_inb(ahc, SBLKCTL) & ENAB40; 1015 printf("%s: Transceiver State Has Changed to %s mode\n", 1016 ahc_name(ahc), now_lvd ? "LVD" : "SE"); 1017 ahc_outb(ahc, CLRSINT0, CLRIOERR); 1018 /* 1019 * When transitioning to SE mode, the reset line 1020 * glitches, triggering an arbitration bug in some 1021 * Ultra2 controllers. This bug is cleared when we 1022 * assert the reset line. Since a reset glitch has 1023 * already occurred with this transition and a 1024 * transceiver state change is handled just like 1025 * a bus reset anyway, asserting the reset line 1026 * ourselves is safe. 1027 */ 1028 ahc_reset_channel(ahc, intr_channel, 1029 /*Initiate Reset*/now_lvd == 0); 1030 } else if ((status & SCSIRSTI) != 0) { 1031 printf("%s: Someone reset channel %c\n", 1032 ahc_name(ahc), intr_channel); 1033 if (intr_channel != cur_channel) 1034 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB); 1035 ahc_reset_channel(ahc, intr_channel, /*Initiate Reset*/FALSE); 1036 } else if ((status & SCSIPERR) != 0) { 1037 /* 1038 * Determine the bus phase and queue an appropriate message. 1039 * SCSIPERR is latched true as soon as a parity error 1040 * occurs. If the sequencer acked the transfer that 1041 * caused the parity error and the currently presented 1042 * transfer on the bus has correct parity, SCSIPERR will 1043 * be cleared by CLRSCSIPERR. Use this to determine if 1044 * we should look at the last phase the sequencer recorded, 1045 * or the current phase presented on the bus. 1046 */ 1047 struct ahc_devinfo devinfo; 1048 u_int mesg_out; 1049 u_int curphase; 1050 u_int errorphase; 1051 u_int lastphase; 1052 u_int scsirate; 1053 u_int i; 1054 u_int sstat2; 1055 int silent; 1056 1057 lastphase = ahc_inb(ahc, LASTPHASE); 1058 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 1059 sstat2 = ahc_inb(ahc, SSTAT2); 1060 ahc_outb(ahc, CLRSINT1, CLRSCSIPERR); 1061 /* 1062 * For all phases save DATA, the sequencer won't 1063 * automatically ack a byte that has a parity error 1064 * in it. So the only way that the current phase 1065 * could be 'data-in' is if the parity error is for 1066 * an already acked byte in the data phase. During 1067 * synchronous data-in transfers, we may actually 1068 * ack bytes before latching the current phase in 1069 * LASTPHASE, leading to the discrepancy between 1070 * curphase and lastphase. 1071 */ 1072 if ((ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0 1073 || curphase == P_DATAIN || curphase == P_DATAIN_DT) 1074 errorphase = curphase; 1075 else 1076 errorphase = lastphase; 1077 1078 for (i = 0; i < num_phases; i++) { 1079 if (errorphase == ahc_phase_table[i].phase) 1080 break; 1081 } 1082 mesg_out = ahc_phase_table[i].mesg_out; 1083 silent = FALSE; 1084 if (scb != NULL) { 1085 if (SCB_IS_SILENT(scb)) 1086 silent = TRUE; 1087 else 1088 ahc_print_path(ahc, scb); 1089 scb->flags |= SCB_TRANSMISSION_ERROR; 1090 } else 1091 printf("%s:%c:%d: ", ahc_name(ahc), intr_channel, 1092 SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID))); 1093 scsirate = ahc_inb(ahc, SCSIRATE); 1094 if (silent == FALSE) { 1095 printf("parity error detected %s. " 1096 "SEQADDR(0x%x) SCSIRATE(0x%x)\n", 1097 ahc_phase_table[i].phasemsg, 1098 ahc_inw(ahc, SEQADDR0), 1099 scsirate); 1100 if ((ahc->features & AHC_DT) != 0) { 1101 if ((sstat2 & CRCVALERR) != 0) 1102 printf("\tCRC Value Mismatch\n"); 1103 if ((sstat2 & CRCENDERR) != 0) 1104 printf("\tNo terminal CRC packet " 1105 "received\n"); 1106 if ((sstat2 & CRCREQERR) != 0) 1107 printf("\tIllegal CRC packet " 1108 "request\n"); 1109 if ((sstat2 & DUAL_EDGE_ERR) != 0) 1110 printf("\tUnexpected %sDT Data Phase\n", 1111 (scsirate & SINGLE_EDGE) 1112 ? "" : "non-"); 1113 } 1114 } 1115 1116 if ((ahc->features & AHC_DT) != 0 1117 && (sstat2 & DUAL_EDGE_ERR) != 0) { 1118 /* 1119 * This error applies regardless of 1120 * data direction, so ignore the value 1121 * in the phase table. 1122 */ 1123 mesg_out = MSG_INITIATOR_DET_ERR; 1124 } 1125 1126 /* 1127 * We've set the hardware to assert ATN if we 1128 * get a parity error on "in" phases, so all we 1129 * need to do is stuff the message buffer with 1130 * the appropriate message. "In" phases have set 1131 * mesg_out to something other than MSG_NOP. 1132 */ 1133 if (mesg_out != MSG_NOOP) { 1134 if (ahc->msg_type != MSG_TYPE_NONE) 1135 ahc->send_msg_perror = TRUE; 1136 else 1137 ahc_outb(ahc, MSG_OUT, mesg_out); 1138 } 1139 /* 1140 * Force a renegotiation with this target just in 1141 * case we are out of sync for some external reason 1142 * unknown (or unreported) by the target. 1143 */ 1144 ahc_fetch_devinfo(ahc, &devinfo); 1145 ahc_force_renegotiation(ahc, &devinfo); 1146 1147 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1148 ahc_unpause(ahc); 1149 } else if ((status & SELTO) != 0) { 1150 u_int scbptr; 1151 1152 /* Stop the selection */ 1153 ahc_outb(ahc, SCSISEQ, 0); 1154 1155 /* No more pending messages */ 1156 ahc_clear_msg_state(ahc); 1157 1158 /* Clear interrupt state */ 1159 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); 1160 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR); 1161 1162 /* 1163 * Although the driver does not care about the 1164 * 'Selection in Progress' status bit, the busy 1165 * LED does. SELINGO is only cleared by a successful 1166 * selection, so we must manually clear it to insure 1167 * the LED turns off just incase no future successful 1168 * selections occur (e.g. no devices on the bus). 1169 */ 1170 ahc_outb(ahc, CLRSINT0, CLRSELINGO); 1171 1172 scbptr = ahc_inb(ahc, WAITING_SCBH); 1173 ahc_outb(ahc, SCBPTR, scbptr); 1174 scb_index = ahc_inb(ahc, SCB_TAG); 1175 1176 scb = ahc_lookup_scb(ahc, scb_index); 1177 if (scb == NULL) { 1178 printf("%s: ahc_intr - referenced scb not " 1179 "valid during SELTO scb(%d, %d)\n", 1180 ahc_name(ahc), scbptr, scb_index); 1181 ahc_dump_card_state(ahc); 1182 } else { 1183 struct ahc_devinfo devinfo; 1184 #ifdef AHC_DEBUG 1185 if ((ahc_debug & AHC_SHOW_SELTO) != 0) { 1186 ahc_print_path(ahc, scb); 1187 printf("Saw Selection Timeout for SCB 0x%x\n", 1188 scb_index); 1189 } 1190 #endif 1191 ahc_scb_devinfo(ahc, &devinfo, scb); 1192 aic_set_transaction_status(scb, CAM_SEL_TIMEOUT); 1193 ahc_freeze_devq(ahc, scb); 1194 1195 /* 1196 * Cancel any pending transactions on the device 1197 * now that it seems to be missing. This will 1198 * also revert us to async/narrow transfers until 1199 * we can renegotiate with the device. 1200 */ 1201 ahc_handle_devreset(ahc, &devinfo, 1202 CAM_SEL_TIMEOUT, 1203 "Selection Timeout", 1204 /*verbose_level*/1); 1205 } 1206 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1207 ahc_restart(ahc); 1208 } else if ((status & BUSFREE) != 0 1209 && (ahc_inb(ahc, SIMODE1) & ENBUSFREE) != 0) { 1210 struct ahc_devinfo devinfo; 1211 u_int lastphase; 1212 u_int saved_scsiid; 1213 u_int saved_lun; 1214 u_int target; 1215 u_int initiator_role_id; 1216 char channel; 1217 int printerror; 1218 1219 /* 1220 * Clear our selection hardware as soon as possible. 1221 * We may have an entry in the waiting Q for this target, 1222 * that is affected by this busfree and we don't want to 1223 * go about selecting the target while we handle the event. 1224 */ 1225 ahc_outb(ahc, SCSISEQ, 1226 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); 1227 1228 /* 1229 * Disable busfree interrupts and clear the busfree 1230 * interrupt status. We do this here so that several 1231 * bus transactions occur prior to clearing the SCSIINT 1232 * latch. It can take a bit for the clearing to take effect. 1233 */ 1234 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); 1235 ahc_outb(ahc, CLRSINT1, CLRBUSFREE|CLRSCSIPERR); 1236 1237 /* 1238 * Look at what phase we were last in. 1239 * If its message out, chances are pretty good 1240 * that the busfree was in response to one of 1241 * our abort requests. 1242 */ 1243 lastphase = ahc_inb(ahc, LASTPHASE); 1244 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 1245 saved_lun = ahc_inb(ahc, SAVED_LUN); 1246 target = SCSIID_TARGET(ahc, saved_scsiid); 1247 initiator_role_id = SCSIID_OUR_ID(saved_scsiid); 1248 channel = SCSIID_CHANNEL(ahc, saved_scsiid); 1249 ahc_compile_devinfo(&devinfo, initiator_role_id, 1250 target, saved_lun, channel, ROLE_INITIATOR); 1251 printerror = 1; 1252 1253 if (lastphase == P_MESGOUT) { 1254 u_int tag; 1255 1256 tag = SCB_LIST_NULL; 1257 if (ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT_TAG, TRUE) 1258 || ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT, TRUE)) { 1259 if (ahc->msgout_buf[ahc->msgout_index - 1] 1260 == MSG_ABORT_TAG) 1261 tag = scb->hscb->tag; 1262 ahc_print_path(ahc, scb); 1263 printf("SCB %d - Abort%s Completed.\n", 1264 scb->hscb->tag, tag == SCB_LIST_NULL ? 1265 "" : " Tag"); 1266 ahc_abort_scbs(ahc, target, channel, 1267 saved_lun, tag, 1268 ROLE_INITIATOR, 1269 CAM_REQ_ABORTED); 1270 printerror = 0; 1271 } else if (ahc_sent_msg(ahc, AHCMSG_1B, 1272 MSG_BUS_DEV_RESET, TRUE)) { 1273 /* 1274 * Don't mark the user's request for this BDR 1275 * as completing with CAM_BDR_SENT. CAM3 1276 * specifies CAM_REQ_CMP. 1277 */ 1278 if (scb != NULL 1279 && scb->io_ctx->ccb_h.func_code== XPT_RESET_DEV 1280 && ahc_match_scb(ahc, scb, target, channel, 1281 CAM_LUN_WILDCARD, 1282 SCB_LIST_NULL, 1283 ROLE_INITIATOR)) { 1284 aic_set_transaction_status(scb, CAM_REQ_CMP); 1285 } 1286 ahc_compile_devinfo(&devinfo, 1287 initiator_role_id, 1288 target, 1289 CAM_LUN_WILDCARD, 1290 channel, 1291 ROLE_INITIATOR); 1292 ahc_handle_devreset(ahc, &devinfo, 1293 CAM_BDR_SENT, 1294 "Bus Device Reset", 1295 /*verbose_level*/0); 1296 printerror = 0; 1297 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, 1298 MSG_EXT_PPR, FALSE)) { 1299 struct ahc_initiator_tinfo *tinfo; 1300 struct ahc_tmode_tstate *tstate; 1301 1302 /* 1303 * PPR Rejected. Try non-ppr negotiation 1304 * and retry command. 1305 */ 1306 tinfo = ahc_fetch_transinfo(ahc, 1307 devinfo.channel, 1308 devinfo.our_scsiid, 1309 devinfo.target, 1310 &tstate); 1311 tinfo->curr.transport_version = 2; 1312 tinfo->goal.transport_version = 2; 1313 tinfo->goal.ppr_options = 0; 1314 ahc_qinfifo_requeue_tail(ahc, scb); 1315 printerror = 0; 1316 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, 1317 MSG_EXT_WDTR, FALSE)) { 1318 /* 1319 * Negotiation Rejected. Go-narrow and 1320 * retry command. 1321 */ 1322 ahc_set_width(ahc, &devinfo, 1323 MSG_EXT_WDTR_BUS_8_BIT, 1324 AHC_TRANS_CUR|AHC_TRANS_GOAL, 1325 /*paused*/TRUE); 1326 ahc_qinfifo_requeue_tail(ahc, scb); 1327 printerror = 0; 1328 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, 1329 MSG_EXT_SDTR, FALSE)) { 1330 /* 1331 * Negotiation Rejected. Go-async and 1332 * retry command. 1333 */ 1334 ahc_set_syncrate(ahc, &devinfo, 1335 /*syncrate*/NULL, 1336 /*period*/0, /*offset*/0, 1337 /*ppr_options*/0, 1338 AHC_TRANS_CUR|AHC_TRANS_GOAL, 1339 /*paused*/TRUE); 1340 ahc_qinfifo_requeue_tail(ahc, scb); 1341 printerror = 0; 1342 } 1343 } 1344 if (printerror != 0) { 1345 u_int i; 1346 1347 if (scb != NULL) { 1348 u_int tag; 1349 1350 if ((scb->hscb->control & TAG_ENB) != 0) 1351 tag = scb->hscb->tag; 1352 else 1353 tag = SCB_LIST_NULL; 1354 ahc_print_path(ahc, scb); 1355 ahc_abort_scbs(ahc, target, channel, 1356 SCB_GET_LUN(scb), tag, 1357 ROLE_INITIATOR, 1358 CAM_UNEXP_BUSFREE); 1359 } else { 1360 /* 1361 * We had not fully identified this connection, 1362 * so we cannot abort anything. 1363 */ 1364 printf("%s: ", ahc_name(ahc)); 1365 } 1366 for (i = 0; i < num_phases; i++) { 1367 if (lastphase == ahc_phase_table[i].phase) 1368 break; 1369 } 1370 if (lastphase != P_BUSFREE) { 1371 /* 1372 * Renegotiate with this device at the 1373 * next opportunity just in case this busfree 1374 * is due to a negotiation mismatch with the 1375 * device. 1376 */ 1377 ahc_force_renegotiation(ahc, &devinfo); 1378 } 1379 printf("Unexpected busfree %s\n" 1380 "SEQADDR == 0x%x\n", 1381 ahc_phase_table[i].phasemsg, 1382 ahc_inb(ahc, SEQADDR0) 1383 | (ahc_inb(ahc, SEQADDR1) << 8)); 1384 } 1385 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1386 ahc_restart(ahc); 1387 } else { 1388 printf("%s: Missing case in ahc_handle_scsiint. status = %x\n", 1389 ahc_name(ahc), status); 1390 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1391 } 1392 } 1393 1394 /* 1395 * Force renegotiation to occur the next time we initiate 1396 * a command to the current device. 1397 */ 1398 static void 1399 ahc_force_renegotiation(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1400 { 1401 struct ahc_initiator_tinfo *targ_info; 1402 struct ahc_tmode_tstate *tstate; 1403 1404 targ_info = ahc_fetch_transinfo(ahc, 1405 devinfo->channel, 1406 devinfo->our_scsiid, 1407 devinfo->target, 1408 &tstate); 1409 ahc_update_neg_request(ahc, devinfo, tstate, 1410 targ_info, AHC_NEG_IF_NON_ASYNC); 1411 } 1412 1413 #define AHC_MAX_STEPS 2000 1414 void 1415 ahc_clear_critical_section(struct ahc_softc *ahc) 1416 { 1417 int stepping; 1418 int steps; 1419 u_int simode0; 1420 u_int simode1; 1421 1422 if (ahc->num_critical_sections == 0) 1423 return; 1424 1425 stepping = FALSE; 1426 steps = 0; 1427 simode0 = 0; 1428 simode1 = 0; 1429 for (;;) { 1430 struct cs *cs; 1431 u_int seqaddr; 1432 u_int i; 1433 1434 seqaddr = ahc_inb(ahc, SEQADDR0) 1435 | (ahc_inb(ahc, SEQADDR1) << 8); 1436 1437 /* 1438 * Seqaddr represents the next instruction to execute, 1439 * so we are really executing the instruction just 1440 * before it. 1441 */ 1442 cs = ahc->critical_sections; 1443 for (i = 0; i < ahc->num_critical_sections; i++, cs++) { 1444 1445 if (cs->begin < seqaddr && cs->end >= seqaddr) 1446 break; 1447 } 1448 1449 if (i == ahc->num_critical_sections) 1450 break; 1451 1452 if (steps > AHC_MAX_STEPS) { 1453 printf("%s: Infinite loop in critical section\n", 1454 ahc_name(ahc)); 1455 ahc_dump_card_state(ahc); 1456 panic("critical section loop"); 1457 } 1458 1459 steps++; 1460 if (stepping == FALSE) { 1461 /* 1462 * Disable all interrupt sources so that the 1463 * sequencer will not be stuck by a pausing 1464 * interrupt condition while we attempt to 1465 * leave a critical section. 1466 */ 1467 simode0 = ahc_inb(ahc, SIMODE0); 1468 ahc_outb(ahc, SIMODE0, 0); 1469 simode1 = ahc_inb(ahc, SIMODE1); 1470 if ((ahc->features & AHC_DT) != 0) 1471 /* 1472 * On DT class controllers, we 1473 * use the enhanced busfree logic. 1474 * Unfortunately we cannot re-enable 1475 * busfree detection within the 1476 * current connection, so we must 1477 * leave it on while single stepping. 1478 */ 1479 ahc_outb(ahc, SIMODE1, simode1 & ENBUSFREE); 1480 else 1481 ahc_outb(ahc, SIMODE1, 0); 1482 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1483 ahc_outb(ahc, SEQCTL, ahc->seqctl | STEP); 1484 stepping = TRUE; 1485 } 1486 if ((ahc->features & AHC_DT) != 0) { 1487 ahc_outb(ahc, CLRSINT1, CLRBUSFREE); 1488 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1489 } 1490 ahc_outb(ahc, HCNTRL, ahc->unpause); 1491 while (!ahc_is_paused(ahc)) 1492 aic_delay(200); 1493 } 1494 if (stepping) { 1495 ahc_outb(ahc, SIMODE0, simode0); 1496 ahc_outb(ahc, SIMODE1, simode1); 1497 ahc_outb(ahc, SEQCTL, ahc->seqctl); 1498 } 1499 } 1500 1501 /* 1502 * Clear any pending interrupt status. 1503 */ 1504 void 1505 ahc_clear_intstat(struct ahc_softc *ahc) 1506 { 1507 /* Clear any interrupt conditions this may have caused */ 1508 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI 1509 |CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG| 1510 CLRREQINIT); 1511 ahc_flush_device_writes(ahc); 1512 ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO); 1513 ahc_flush_device_writes(ahc); 1514 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1515 ahc_flush_device_writes(ahc); 1516 } 1517 1518 /**************************** Debugging Routines ******************************/ 1519 #ifdef AHC_DEBUG 1520 uint32_t ahc_debug = AHC_DEBUG_OPTS; 1521 #endif 1522 1523 void 1524 ahc_print_scb(struct scb *scb) 1525 { 1526 int i; 1527 1528 struct hardware_scb *hscb = scb->hscb; 1529 1530 printf("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n", 1531 (void *)scb, 1532 hscb->control, 1533 hscb->scsiid, 1534 hscb->lun, 1535 hscb->cdb_len); 1536 printf("Shared Data: "); 1537 for (i = 0; i < sizeof(hscb->shared_data.cdb); i++) 1538 printf("%#02x", hscb->shared_data.cdb[i]); 1539 printf(" dataptr:%#x datacnt:%#x sgptr:%#x tag:%#x\n", 1540 aic_le32toh(hscb->dataptr), 1541 aic_le32toh(hscb->datacnt), 1542 aic_le32toh(hscb->sgptr), 1543 hscb->tag); 1544 if (scb->sg_count > 0) { 1545 for (i = 0; i < scb->sg_count; i++) { 1546 printf("sg[%d] - Addr 0x%x%x : Length %d\n", 1547 i, 1548 (aic_le32toh(scb->sg_list[i].len) >> 24 1549 & SG_HIGH_ADDR_BITS), 1550 aic_le32toh(scb->sg_list[i].addr), 1551 aic_le32toh(scb->sg_list[i].len)); 1552 } 1553 } 1554 } 1555 1556 /************************* Transfer Negotiation *******************************/ 1557 /* 1558 * Allocate per target mode instance (ID we respond to as a target) 1559 * transfer negotiation data structures. 1560 */ 1561 static struct ahc_tmode_tstate * 1562 ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel) 1563 { 1564 struct ahc_tmode_tstate *master_tstate; 1565 struct ahc_tmode_tstate *tstate; 1566 int i; 1567 1568 master_tstate = ahc->enabled_targets[ahc->our_id]; 1569 if (channel == 'B') { 1570 scsi_id += 8; 1571 master_tstate = ahc->enabled_targets[ahc->our_id_b + 8]; 1572 } 1573 if (ahc->enabled_targets[scsi_id] != NULL 1574 && ahc->enabled_targets[scsi_id] != master_tstate) 1575 panic("%s: ahc_alloc_tstate - Target already allocated", 1576 ahc_name(ahc)); 1577 tstate = (struct ahc_tmode_tstate*)malloc(sizeof(*tstate), 1578 M_DEVBUF, M_NOWAIT); 1579 if (tstate == NULL) 1580 return (NULL); 1581 1582 /* 1583 * If we have allocated a master tstate, copy user settings from 1584 * the master tstate (taken from SRAM or the EEPROM) for this 1585 * channel, but reset our current and goal settings to async/narrow 1586 * until an initiator talks to us. 1587 */ 1588 if (master_tstate != NULL) { 1589 memcpy(tstate, master_tstate, sizeof(*tstate)); 1590 memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns)); 1591 tstate->ultraenb = 0; 1592 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1593 memset(&tstate->transinfo[i].curr, 0, 1594 sizeof(tstate->transinfo[i].curr)); 1595 memset(&tstate->transinfo[i].goal, 0, 1596 sizeof(tstate->transinfo[i].goal)); 1597 } 1598 } else 1599 memset(tstate, 0, sizeof(*tstate)); 1600 ahc->enabled_targets[scsi_id] = tstate; 1601 return (tstate); 1602 } 1603 1604 #ifdef AHC_TARGET_MODE 1605 /* 1606 * Free per target mode instance (ID we respond to as a target) 1607 * transfer negotiation data structures. 1608 */ 1609 static void 1610 ahc_free_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel, int force) 1611 { 1612 struct ahc_tmode_tstate *tstate; 1613 1614 /* 1615 * Don't clean up our "master" tstate. 1616 * It has our default user settings. 1617 */ 1618 if (((channel == 'B' && scsi_id == ahc->our_id_b) 1619 || (channel == 'A' && scsi_id == ahc->our_id)) 1620 && force == FALSE) 1621 return; 1622 1623 if (channel == 'B') 1624 scsi_id += 8; 1625 tstate = ahc->enabled_targets[scsi_id]; 1626 if (tstate != NULL) 1627 free(tstate, M_DEVBUF); 1628 ahc->enabled_targets[scsi_id] = NULL; 1629 } 1630 #endif 1631 1632 /* 1633 * Called when we have an active connection to a target on the bus, 1634 * this function finds the nearest syncrate to the input period limited 1635 * by the capabilities of the bus connectivity of and sync settings for 1636 * the target. 1637 */ 1638 struct ahc_syncrate * 1639 ahc_devlimited_syncrate(struct ahc_softc *ahc, 1640 struct ahc_initiator_tinfo *tinfo, 1641 u_int *period, u_int *ppr_options, role_t role) 1642 { 1643 struct ahc_transinfo *transinfo; 1644 u_int maxsync; 1645 1646 if ((ahc->features & AHC_ULTRA2) != 0) { 1647 if ((ahc_inb(ahc, SBLKCTL) & ENAB40) != 0 1648 && (ahc_inb(ahc, SSTAT2) & EXP_ACTIVE) == 0) { 1649 maxsync = AHC_SYNCRATE_DT; 1650 } else { 1651 maxsync = AHC_SYNCRATE_ULTRA; 1652 /* Can't do DT on an SE bus */ 1653 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 1654 } 1655 } else if ((ahc->features & AHC_ULTRA) != 0) { 1656 maxsync = AHC_SYNCRATE_ULTRA; 1657 } else { 1658 maxsync = AHC_SYNCRATE_FAST; 1659 } 1660 /* 1661 * Never allow a value higher than our current goal 1662 * period otherwise we may allow a target initiated 1663 * negotiation to go above the limit as set by the 1664 * user. In the case of an initiator initiated 1665 * sync negotiation, we limit based on the user 1666 * setting. This allows the system to still accept 1667 * incoming negotiations even if target initiated 1668 * negotiation is not performed. 1669 */ 1670 if (role == ROLE_TARGET) 1671 transinfo = &tinfo->user; 1672 else 1673 transinfo = &tinfo->goal; 1674 *ppr_options &= transinfo->ppr_options; 1675 if (transinfo->width == MSG_EXT_WDTR_BUS_8_BIT) { 1676 maxsync = MAX(maxsync, AHC_SYNCRATE_ULTRA2); 1677 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 1678 } 1679 if (transinfo->period == 0) { 1680 *period = 0; 1681 *ppr_options = 0; 1682 return (NULL); 1683 } 1684 *period = MAX(*period, transinfo->period); 1685 return (ahc_find_syncrate(ahc, period, ppr_options, maxsync)); 1686 } 1687 1688 /* 1689 * Look up the valid period to SCSIRATE conversion in our table. 1690 * Return the period and offset that should be sent to the target 1691 * if this was the beginning of an SDTR. 1692 */ 1693 struct ahc_syncrate * 1694 ahc_find_syncrate(struct ahc_softc *ahc, u_int *period, 1695 u_int *ppr_options, u_int maxsync) 1696 { 1697 struct ahc_syncrate *syncrate; 1698 1699 if ((ahc->features & AHC_DT) == 0) 1700 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 1701 1702 /* Skip all DT only entries if DT is not available */ 1703 if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0 1704 && maxsync < AHC_SYNCRATE_ULTRA2) 1705 maxsync = AHC_SYNCRATE_ULTRA2; 1706 1707 for (syncrate = &ahc_syncrates[maxsync]; 1708 syncrate->rate != NULL; 1709 syncrate++) { 1710 /* 1711 * The Ultra2 table doesn't go as low 1712 * as for the Fast/Ultra cards. 1713 */ 1714 if ((ahc->features & AHC_ULTRA2) != 0 1715 && (syncrate->sxfr_u2 == 0)) 1716 break; 1717 1718 if (*period <= syncrate->period) { 1719 /* 1720 * When responding to a target that requests 1721 * sync, the requested rate may fall between 1722 * two rates that we can output, but still be 1723 * a rate that we can receive. Because of this, 1724 * we want to respond to the target with 1725 * the same rate that it sent to us even 1726 * if the period we use to send data to it 1727 * is lower. Only lower the response period 1728 * if we must. 1729 */ 1730 if (syncrate == &ahc_syncrates[maxsync]) 1731 *period = syncrate->period; 1732 1733 /* 1734 * At some speeds, we only support 1735 * ST transfers. 1736 */ 1737 if ((syncrate->sxfr_u2 & ST_SXFR) != 0) 1738 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 1739 break; 1740 } 1741 } 1742 1743 if ((*period == 0) 1744 || (syncrate->rate == NULL) 1745 || ((ahc->features & AHC_ULTRA2) != 0 1746 && (syncrate->sxfr_u2 == 0))) { 1747 /* Use asynchronous transfers. */ 1748 *period = 0; 1749 syncrate = NULL; 1750 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 1751 } 1752 return (syncrate); 1753 } 1754 1755 /* 1756 * Convert from an entry in our syncrate table to the SCSI equivalent 1757 * sync "period" factor. 1758 */ 1759 u_int 1760 ahc_find_period(struct ahc_softc *ahc, u_int scsirate, u_int maxsync) 1761 { 1762 struct ahc_syncrate *syncrate; 1763 1764 if ((ahc->features & AHC_ULTRA2) != 0) 1765 scsirate &= SXFR_ULTRA2; 1766 else 1767 scsirate &= SXFR; 1768 1769 syncrate = &ahc_syncrates[maxsync]; 1770 while (syncrate->rate != NULL) { 1771 if ((ahc->features & AHC_ULTRA2) != 0) { 1772 if (syncrate->sxfr_u2 == 0) 1773 break; 1774 else if (scsirate == (syncrate->sxfr_u2 & SXFR_ULTRA2)) 1775 return (syncrate->period); 1776 } else if (scsirate == (syncrate->sxfr & SXFR)) { 1777 return (syncrate->period); 1778 } 1779 syncrate++; 1780 } 1781 return (0); /* async */ 1782 } 1783 1784 /* 1785 * Truncate the given synchronous offset to a value the 1786 * current adapter type and syncrate are capable of. 1787 */ 1788 void 1789 ahc_validate_offset(struct ahc_softc *ahc, 1790 struct ahc_initiator_tinfo *tinfo, 1791 struct ahc_syncrate *syncrate, 1792 u_int *offset, int wide, role_t role) 1793 { 1794 u_int maxoffset; 1795 1796 /* Limit offset to what we can do */ 1797 if (syncrate == NULL) { 1798 maxoffset = 0; 1799 } else if ((ahc->features & AHC_ULTRA2) != 0) { 1800 maxoffset = MAX_OFFSET_ULTRA2; 1801 } else { 1802 if (wide) 1803 maxoffset = MAX_OFFSET_16BIT; 1804 else 1805 maxoffset = MAX_OFFSET_8BIT; 1806 } 1807 *offset = MIN(*offset, maxoffset); 1808 if (tinfo != NULL) { 1809 if (role == ROLE_TARGET) 1810 *offset = MIN(*offset, tinfo->user.offset); 1811 else 1812 *offset = MIN(*offset, tinfo->goal.offset); 1813 } 1814 } 1815 1816 /* 1817 * Truncate the given transfer width parameter to a value the 1818 * current adapter type is capable of. 1819 */ 1820 void 1821 ahc_validate_width(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo, 1822 u_int *bus_width, role_t role) 1823 { 1824 switch (*bus_width) { 1825 default: 1826 if (ahc->features & AHC_WIDE) { 1827 /* Respond Wide */ 1828 *bus_width = MSG_EXT_WDTR_BUS_16_BIT; 1829 break; 1830 } 1831 /* FALLTHROUGH */ 1832 case MSG_EXT_WDTR_BUS_8_BIT: 1833 *bus_width = MSG_EXT_WDTR_BUS_8_BIT; 1834 break; 1835 } 1836 if (tinfo != NULL) { 1837 if (role == ROLE_TARGET) 1838 *bus_width = MIN(tinfo->user.width, *bus_width); 1839 else 1840 *bus_width = MIN(tinfo->goal.width, *bus_width); 1841 } 1842 } 1843 1844 /* 1845 * Update the bitmask of targets for which the controller should 1846 * negotiate with at the next convenient opportunity. This currently 1847 * means the next time we send the initial identify messages for 1848 * a new transaction. 1849 */ 1850 int 1851 ahc_update_neg_request(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 1852 struct ahc_tmode_tstate *tstate, 1853 struct ahc_initiator_tinfo *tinfo, ahc_neg_type neg_type) 1854 { 1855 u_int auto_negotiate_orig; 1856 1857 auto_negotiate_orig = tstate->auto_negotiate; 1858 if (neg_type == AHC_NEG_ALWAYS) { 1859 /* 1860 * Force our "current" settings to be 1861 * unknown so that unless a bus reset 1862 * occurs the need to renegotiate is 1863 * recorded persistently. 1864 */ 1865 if ((ahc->features & AHC_WIDE) != 0) 1866 tinfo->curr.width = AHC_WIDTH_UNKNOWN; 1867 tinfo->curr.period = AHC_PERIOD_UNKNOWN; 1868 tinfo->curr.offset = AHC_OFFSET_UNKNOWN; 1869 } 1870 if (tinfo->curr.period != tinfo->goal.period 1871 || tinfo->curr.width != tinfo->goal.width 1872 || tinfo->curr.offset != tinfo->goal.offset 1873 || tinfo->curr.ppr_options != tinfo->goal.ppr_options 1874 || (neg_type == AHC_NEG_IF_NON_ASYNC 1875 && (tinfo->goal.offset != 0 1876 || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT 1877 || tinfo->goal.ppr_options != 0))) 1878 tstate->auto_negotiate |= devinfo->target_mask; 1879 else 1880 tstate->auto_negotiate &= ~devinfo->target_mask; 1881 1882 return (auto_negotiate_orig != tstate->auto_negotiate); 1883 } 1884 1885 /* 1886 * Update the user/goal/curr tables of synchronous negotiation 1887 * parameters as well as, in the case of a current or active update, 1888 * any data structures on the host controller. In the case of an 1889 * active update, the specified target is currently talking to us on 1890 * the bus, so the transfer parameter update must take effect 1891 * immediately. 1892 */ 1893 void 1894 ahc_set_syncrate(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 1895 struct ahc_syncrate *syncrate, u_int period, 1896 u_int offset, u_int ppr_options, u_int type, int paused) 1897 { 1898 struct ahc_initiator_tinfo *tinfo; 1899 struct ahc_tmode_tstate *tstate; 1900 u_int old_period; 1901 u_int old_offset; 1902 u_int old_ppr; 1903 int active; 1904 int update_needed; 1905 1906 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE; 1907 update_needed = 0; 1908 1909 if (syncrate == NULL) { 1910 period = 0; 1911 offset = 0; 1912 } 1913 1914 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 1915 devinfo->target, &tstate); 1916 1917 if ((type & AHC_TRANS_USER) != 0) { 1918 tinfo->user.period = period; 1919 tinfo->user.offset = offset; 1920 tinfo->user.ppr_options = ppr_options; 1921 } 1922 1923 if ((type & AHC_TRANS_GOAL) != 0) { 1924 tinfo->goal.period = period; 1925 tinfo->goal.offset = offset; 1926 tinfo->goal.ppr_options = ppr_options; 1927 } 1928 1929 old_period = tinfo->curr.period; 1930 old_offset = tinfo->curr.offset; 1931 old_ppr = tinfo->curr.ppr_options; 1932 1933 if ((type & AHC_TRANS_CUR) != 0 1934 && (old_period != period 1935 || old_offset != offset 1936 || old_ppr != ppr_options)) { 1937 u_int scsirate; 1938 1939 update_needed++; 1940 scsirate = tinfo->scsirate; 1941 if ((ahc->features & AHC_ULTRA2) != 0) { 1942 scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC); 1943 if (syncrate != NULL) { 1944 scsirate |= syncrate->sxfr_u2; 1945 if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) 1946 scsirate |= ENABLE_CRC; 1947 else 1948 scsirate |= SINGLE_EDGE; 1949 } 1950 } else { 1951 scsirate &= ~(SXFR|SOFS); 1952 /* 1953 * Ensure Ultra mode is set properly for 1954 * this target. 1955 */ 1956 tstate->ultraenb &= ~devinfo->target_mask; 1957 if (syncrate != NULL) { 1958 if (syncrate->sxfr & ULTRA_SXFR) { 1959 tstate->ultraenb |= 1960 devinfo->target_mask; 1961 } 1962 scsirate |= syncrate->sxfr & SXFR; 1963 scsirate |= offset & SOFS; 1964 } 1965 if (active) { 1966 u_int sxfrctl0; 1967 1968 sxfrctl0 = ahc_inb(ahc, SXFRCTL0); 1969 sxfrctl0 &= ~FAST20; 1970 if (tstate->ultraenb & devinfo->target_mask) 1971 sxfrctl0 |= FAST20; 1972 ahc_outb(ahc, SXFRCTL0, sxfrctl0); 1973 } 1974 } 1975 if (active) { 1976 ahc_outb(ahc, SCSIRATE, scsirate); 1977 if ((ahc->features & AHC_ULTRA2) != 0) 1978 ahc_outb(ahc, SCSIOFFSET, offset); 1979 } 1980 1981 tinfo->scsirate = scsirate; 1982 tinfo->curr.period = period; 1983 tinfo->curr.offset = offset; 1984 tinfo->curr.ppr_options = ppr_options; 1985 1986 ahc_send_async(ahc, devinfo->channel, devinfo->target, 1987 CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL); 1988 if (bootverbose) { 1989 if (offset != 0) { 1990 printf("%s: target %d synchronous at %sMHz%s, " 1991 "offset = 0x%x\n", ahc_name(ahc), 1992 devinfo->target, syncrate->rate, 1993 (ppr_options & MSG_EXT_PPR_DT_REQ) 1994 ? " DT" : "", offset); 1995 } else { 1996 printf("%s: target %d using " 1997 "asynchronous transfers\n", 1998 ahc_name(ahc), devinfo->target); 1999 } 2000 } 2001 } 2002 2003 update_needed += ahc_update_neg_request(ahc, devinfo, tstate, 2004 tinfo, AHC_NEG_TO_GOAL); 2005 2006 if (update_needed) 2007 ahc_update_pending_scbs(ahc); 2008 } 2009 2010 /* 2011 * Update the user/goal/curr tables of wide negotiation 2012 * parameters as well as, in the case of a current or active update, 2013 * any data structures on the host controller. In the case of an 2014 * active update, the specified target is currently talking to us on 2015 * the bus, so the transfer parameter update must take effect 2016 * immediately. 2017 */ 2018 void 2019 ahc_set_width(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2020 u_int width, u_int type, int paused) 2021 { 2022 struct ahc_initiator_tinfo *tinfo; 2023 struct ahc_tmode_tstate *tstate; 2024 u_int oldwidth; 2025 int active; 2026 int update_needed; 2027 2028 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE; 2029 update_needed = 0; 2030 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 2031 devinfo->target, &tstate); 2032 2033 if ((type & AHC_TRANS_USER) != 0) 2034 tinfo->user.width = width; 2035 2036 if ((type & AHC_TRANS_GOAL) != 0) 2037 tinfo->goal.width = width; 2038 2039 oldwidth = tinfo->curr.width; 2040 if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) { 2041 u_int scsirate; 2042 2043 update_needed++; 2044 scsirate = tinfo->scsirate; 2045 scsirate &= ~WIDEXFER; 2046 if (width == MSG_EXT_WDTR_BUS_16_BIT) 2047 scsirate |= WIDEXFER; 2048 2049 tinfo->scsirate = scsirate; 2050 2051 if (active) 2052 ahc_outb(ahc, SCSIRATE, scsirate); 2053 2054 tinfo->curr.width = width; 2055 2056 ahc_send_async(ahc, devinfo->channel, devinfo->target, 2057 CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL); 2058 if (bootverbose) { 2059 printf("%s: target %d using %dbit transfers\n", 2060 ahc_name(ahc), devinfo->target, 2061 8 * (0x01 << width)); 2062 } 2063 } 2064 2065 update_needed += ahc_update_neg_request(ahc, devinfo, tstate, 2066 tinfo, AHC_NEG_TO_GOAL); 2067 if (update_needed) 2068 ahc_update_pending_scbs(ahc); 2069 } 2070 2071 /* 2072 * Update the current state of tagged queuing for a given target. 2073 */ 2074 void 2075 ahc_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2076 ahc_queue_alg alg) 2077 { 2078 ahc_platform_set_tags(ahc, devinfo, alg); 2079 ahc_send_async(ahc, devinfo->channel, devinfo->target, 2080 devinfo->lun, AC_TRANSFER_NEG, &alg); 2081 } 2082 2083 /* 2084 * When the transfer settings for a connection change, update any 2085 * in-transit SCBs to contain the new data so the hardware will 2086 * be set correctly during future (re)selections. 2087 */ 2088 static void 2089 ahc_update_pending_scbs(struct ahc_softc *ahc) 2090 { 2091 struct scb *pending_scb; 2092 int pending_scb_count; 2093 int i; 2094 int paused; 2095 u_int saved_scbptr; 2096 2097 /* 2098 * Traverse the pending SCB list and ensure that all of the 2099 * SCBs there have the proper settings. 2100 */ 2101 pending_scb_count = 0; 2102 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2103 struct ahc_devinfo devinfo; 2104 struct hardware_scb *pending_hscb; 2105 struct ahc_initiator_tinfo *tinfo; 2106 struct ahc_tmode_tstate *tstate; 2107 2108 ahc_scb_devinfo(ahc, &devinfo, pending_scb); 2109 tinfo = ahc_fetch_transinfo(ahc, devinfo.channel, 2110 devinfo.our_scsiid, 2111 devinfo.target, &tstate); 2112 pending_hscb = pending_scb->hscb; 2113 pending_hscb->control &= ~ULTRAENB; 2114 if ((tstate->ultraenb & devinfo.target_mask) != 0) 2115 pending_hscb->control |= ULTRAENB; 2116 pending_hscb->scsirate = tinfo->scsirate; 2117 pending_hscb->scsioffset = tinfo->curr.offset; 2118 if ((tstate->auto_negotiate & devinfo.target_mask) == 0 2119 && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) { 2120 pending_scb->flags &= ~SCB_AUTO_NEGOTIATE; 2121 pending_hscb->control &= ~MK_MESSAGE; 2122 } 2123 ahc_sync_scb(ahc, pending_scb, 2124 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 2125 pending_scb_count++; 2126 } 2127 2128 if (pending_scb_count == 0) 2129 return; 2130 2131 if (ahc_is_paused(ahc)) { 2132 paused = 1; 2133 } else { 2134 paused = 0; 2135 ahc_pause(ahc); 2136 } 2137 2138 saved_scbptr = ahc_inb(ahc, SCBPTR); 2139 /* Ensure that the hscbs down on the card match the new information */ 2140 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 2141 struct hardware_scb *pending_hscb; 2142 u_int control; 2143 u_int scb_tag; 2144 2145 ahc_outb(ahc, SCBPTR, i); 2146 scb_tag = ahc_inb(ahc, SCB_TAG); 2147 pending_scb = ahc_lookup_scb(ahc, scb_tag); 2148 if (pending_scb == NULL) 2149 continue; 2150 2151 pending_hscb = pending_scb->hscb; 2152 control = ahc_inb(ahc, SCB_CONTROL); 2153 control &= ~(ULTRAENB|MK_MESSAGE); 2154 control |= pending_hscb->control & (ULTRAENB|MK_MESSAGE); 2155 ahc_outb(ahc, SCB_CONTROL, control); 2156 ahc_outb(ahc, SCB_SCSIRATE, pending_hscb->scsirate); 2157 ahc_outb(ahc, SCB_SCSIOFFSET, pending_hscb->scsioffset); 2158 } 2159 ahc_outb(ahc, SCBPTR, saved_scbptr); 2160 2161 if (paused == 0) 2162 ahc_unpause(ahc); 2163 } 2164 2165 /**************************** Pathing Information *****************************/ 2166 static void 2167 ahc_fetch_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 2168 { 2169 u_int saved_scsiid; 2170 role_t role; 2171 int our_id; 2172 2173 if (ahc_inb(ahc, SSTAT0) & TARGET) 2174 role = ROLE_TARGET; 2175 else 2176 role = ROLE_INITIATOR; 2177 2178 if (role == ROLE_TARGET 2179 && (ahc->features & AHC_MULTI_TID) != 0 2180 && (ahc_inb(ahc, SEQ_FLAGS) 2181 & (CMDPHASE_PENDING|TARG_CMD_PENDING|NO_DISCONNECT)) != 0) { 2182 /* We were selected, so pull our id from TARGIDIN */ 2183 our_id = ahc_inb(ahc, TARGIDIN) & OID; 2184 } else if ((ahc->features & AHC_ULTRA2) != 0) 2185 our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID; 2186 else 2187 our_id = ahc_inb(ahc, SCSIID) & OID; 2188 2189 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2190 ahc_compile_devinfo(devinfo, 2191 our_id, 2192 SCSIID_TARGET(ahc, saved_scsiid), 2193 ahc_inb(ahc, SAVED_LUN), 2194 SCSIID_CHANNEL(ahc, saved_scsiid), 2195 role); 2196 } 2197 2198 struct ahc_phase_table_entry* 2199 ahc_lookup_phase_entry(int phase) 2200 { 2201 struct ahc_phase_table_entry *entry; 2202 struct ahc_phase_table_entry *last_entry; 2203 2204 /* 2205 * num_phases doesn't include the default entry which 2206 * will be returned if the phase doesn't match. 2207 */ 2208 last_entry = &ahc_phase_table[num_phases]; 2209 for (entry = ahc_phase_table; entry < last_entry; entry++) { 2210 if (phase == entry->phase) 2211 break; 2212 } 2213 return (entry); 2214 } 2215 2216 void 2217 ahc_compile_devinfo(struct ahc_devinfo *devinfo, u_int our_id, u_int target, 2218 u_int lun, char channel, role_t role) 2219 { 2220 devinfo->our_scsiid = our_id; 2221 devinfo->target = target; 2222 devinfo->lun = lun; 2223 devinfo->target_offset = target; 2224 devinfo->channel = channel; 2225 devinfo->role = role; 2226 if (channel == 'B') 2227 devinfo->target_offset += 8; 2228 devinfo->target_mask = (0x01 << devinfo->target_offset); 2229 } 2230 2231 void 2232 ahc_print_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 2233 { 2234 printf("%s:%c:%d:%d: ", ahc_name(ahc), devinfo->channel, 2235 devinfo->target, devinfo->lun); 2236 } 2237 2238 static void 2239 ahc_scb_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2240 struct scb *scb) 2241 { 2242 role_t role; 2243 int our_id; 2244 2245 our_id = SCSIID_OUR_ID(scb->hscb->scsiid); 2246 role = ROLE_INITIATOR; 2247 if ((scb->flags & SCB_TARGET_SCB) != 0) 2248 role = ROLE_TARGET; 2249 ahc_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahc, scb), 2250 SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahc, scb), role); 2251 } 2252 2253 /************************ Message Phase Processing ****************************/ 2254 static void 2255 ahc_assert_atn(struct ahc_softc *ahc) 2256 { 2257 u_int scsisigo; 2258 2259 scsisigo = ATNO; 2260 if ((ahc->features & AHC_DT) == 0) 2261 scsisigo |= ahc_inb(ahc, SCSISIGI); 2262 ahc_outb(ahc, SCSISIGO, scsisigo); 2263 } 2264 2265 /* 2266 * When an initiator transaction with the MK_MESSAGE flag either reconnects 2267 * or enters the initial message out phase, we are interrupted. Fill our 2268 * outgoing message buffer with the appropriate message and beging handing 2269 * the message phase(s) manually. 2270 */ 2271 static void 2272 ahc_setup_initiator_msgout(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2273 struct scb *scb) 2274 { 2275 /* 2276 * To facilitate adding multiple messages together, 2277 * each routine should increment the index and len 2278 * variables instead of setting them explicitly. 2279 */ 2280 ahc->msgout_index = 0; 2281 ahc->msgout_len = 0; 2282 2283 if ((scb->flags & SCB_DEVICE_RESET) == 0 2284 && ahc_inb(ahc, MSG_OUT) == MSG_IDENTIFYFLAG) { 2285 u_int identify_msg; 2286 2287 identify_msg = MSG_IDENTIFYFLAG | SCB_GET_LUN(scb); 2288 if ((scb->hscb->control & DISCENB) != 0) 2289 identify_msg |= MSG_IDENTIFY_DISCFLAG; 2290 ahc->msgout_buf[ahc->msgout_index++] = identify_msg; 2291 ahc->msgout_len++; 2292 2293 if ((scb->hscb->control & TAG_ENB) != 0) { 2294 ahc->msgout_buf[ahc->msgout_index++] = 2295 scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE); 2296 ahc->msgout_buf[ahc->msgout_index++] = scb->hscb->tag; 2297 ahc->msgout_len += 2; 2298 } 2299 } 2300 2301 if (scb->flags & SCB_DEVICE_RESET) { 2302 ahc->msgout_buf[ahc->msgout_index++] = MSG_BUS_DEV_RESET; 2303 ahc->msgout_len++; 2304 ahc_print_path(ahc, scb); 2305 printf("Bus Device Reset Message Sent\n"); 2306 /* 2307 * Clear our selection hardware in advance of 2308 * the busfree. We may have an entry in the waiting 2309 * Q for this target, and we don't want to go about 2310 * selecting while we handle the busfree and blow it 2311 * away. 2312 */ 2313 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); 2314 } else if ((scb->flags & SCB_ABORT) != 0) { 2315 if ((scb->hscb->control & TAG_ENB) != 0) 2316 ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT_TAG; 2317 else 2318 ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT; 2319 ahc->msgout_len++; 2320 ahc_print_path(ahc, scb); 2321 printf("Abort%s Message Sent\n", 2322 (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : ""); 2323 /* 2324 * Clear our selection hardware in advance of 2325 * the busfree. We may have an entry in the waiting 2326 * Q for this target, and we don't want to go about 2327 * selecting while we handle the busfree and blow it 2328 * away. 2329 */ 2330 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); 2331 } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) { 2332 ahc_build_transfer_msg(ahc, devinfo); 2333 } else { 2334 printf("ahc_intr: AWAITING_MSG for an SCB that " 2335 "does not have a waiting message\n"); 2336 printf("SCSIID = %x, target_mask = %x\n", scb->hscb->scsiid, 2337 devinfo->target_mask); 2338 panic("SCB = %d, SCB Control = %x, MSG_OUT = %x " 2339 "SCB flags = %x", scb->hscb->tag, scb->hscb->control, 2340 ahc_inb(ahc, MSG_OUT), scb->flags); 2341 } 2342 2343 /* 2344 * Clear the MK_MESSAGE flag from the SCB so we aren't 2345 * asked to send this message again. 2346 */ 2347 ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL) & ~MK_MESSAGE); 2348 scb->hscb->control &= ~MK_MESSAGE; 2349 ahc->msgout_index = 0; 2350 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 2351 } 2352 2353 /* 2354 * Build an appropriate transfer negotiation message for the 2355 * currently active target. 2356 */ 2357 static void 2358 ahc_build_transfer_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 2359 { 2360 /* 2361 * We need to initiate transfer negotiations. 2362 * If our current and goal settings are identical, 2363 * we want to renegotiate due to a check condition. 2364 */ 2365 struct ahc_initiator_tinfo *tinfo; 2366 struct ahc_tmode_tstate *tstate; 2367 struct ahc_syncrate *rate; 2368 int dowide; 2369 int dosync; 2370 int doppr; 2371 u_int period; 2372 u_int ppr_options; 2373 u_int offset; 2374 2375 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 2376 devinfo->target, &tstate); 2377 /* 2378 * Filter our period based on the current connection. 2379 * If we can't perform DT transfers on this segment (not in LVD 2380 * mode for instance), then our decision to issue a PPR message 2381 * may change. 2382 */ 2383 period = tinfo->goal.period; 2384 offset = tinfo->goal.offset; 2385 ppr_options = tinfo->goal.ppr_options; 2386 /* Target initiated PPR is not allowed in the SCSI spec */ 2387 if (devinfo->role == ROLE_TARGET) 2388 ppr_options = 0; 2389 rate = ahc_devlimited_syncrate(ahc, tinfo, &period, 2390 &ppr_options, devinfo->role); 2391 dowide = tinfo->curr.width != tinfo->goal.width; 2392 dosync = tinfo->curr.offset != offset || tinfo->curr.period != period; 2393 /* 2394 * Only use PPR if we have options that need it, even if the device 2395 * claims to support it. There might be an expander in the way 2396 * that doesn't. 2397 */ 2398 doppr = ppr_options != 0; 2399 2400 if (!dowide && !dosync && !doppr) { 2401 dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT; 2402 dosync = tinfo->goal.offset != 0; 2403 } 2404 2405 if (!dowide && !dosync && !doppr) { 2406 /* 2407 * Force async with a WDTR message if we have a wide bus, 2408 * or just issue an SDTR with a 0 offset. 2409 */ 2410 if ((ahc->features & AHC_WIDE) != 0) 2411 dowide = 1; 2412 else 2413 dosync = 1; 2414 2415 if (bootverbose) { 2416 ahc_print_devinfo(ahc, devinfo); 2417 printf("Ensuring async\n"); 2418 } 2419 } 2420 2421 /* Target initiated PPR is not allowed in the SCSI spec */ 2422 if (devinfo->role == ROLE_TARGET) 2423 doppr = 0; 2424 2425 /* 2426 * Both the PPR message and SDTR message require the 2427 * goal syncrate to be limited to what the target device 2428 * is capable of handling (based on whether an LVD->SE 2429 * expander is on the bus), so combine these two cases. 2430 * Regardless, guarantee that if we are using WDTR and SDTR 2431 * messages that WDTR comes first. 2432 */ 2433 if (doppr || (dosync && !dowide)) { 2434 offset = tinfo->goal.offset; 2435 ahc_validate_offset(ahc, tinfo, rate, &offset, 2436 doppr ? tinfo->goal.width 2437 : tinfo->curr.width, 2438 devinfo->role); 2439 if (doppr) { 2440 ahc_construct_ppr(ahc, devinfo, period, offset, 2441 tinfo->goal.width, ppr_options); 2442 } else { 2443 ahc_construct_sdtr(ahc, devinfo, period, offset); 2444 } 2445 } else { 2446 ahc_construct_wdtr(ahc, devinfo, tinfo->goal.width); 2447 } 2448 } 2449 2450 /* 2451 * Build a synchronous negotiation message in our message 2452 * buffer based on the input parameters. 2453 */ 2454 static void 2455 ahc_construct_sdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2456 u_int period, u_int offset) 2457 { 2458 if (offset == 0) 2459 period = AHC_ASYNC_XFER_PERIOD; 2460 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED; 2461 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_SDTR_LEN; 2462 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_SDTR; 2463 ahc->msgout_buf[ahc->msgout_index++] = period; 2464 ahc->msgout_buf[ahc->msgout_index++] = offset; 2465 ahc->msgout_len += 5; 2466 if (bootverbose) { 2467 printf("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n", 2468 ahc_name(ahc), devinfo->channel, devinfo->target, 2469 devinfo->lun, period, offset); 2470 } 2471 } 2472 2473 /* 2474 * Build a wide negotiation message in our message 2475 * buffer based on the input parameters. 2476 */ 2477 static void 2478 ahc_construct_wdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2479 u_int bus_width) 2480 { 2481 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED; 2482 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_WDTR_LEN; 2483 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_WDTR; 2484 ahc->msgout_buf[ahc->msgout_index++] = bus_width; 2485 ahc->msgout_len += 4; 2486 if (bootverbose) { 2487 printf("(%s:%c:%d:%d): Sending WDTR %x\n", 2488 ahc_name(ahc), devinfo->channel, devinfo->target, 2489 devinfo->lun, bus_width); 2490 } 2491 } 2492 2493 /* 2494 * Build a parallel protocol request message in our message 2495 * buffer based on the input parameters. 2496 */ 2497 static void 2498 ahc_construct_ppr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2499 u_int period, u_int offset, u_int bus_width, 2500 u_int ppr_options) 2501 { 2502 if (offset == 0) 2503 period = AHC_ASYNC_XFER_PERIOD; 2504 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED; 2505 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_PPR_LEN; 2506 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_PPR; 2507 ahc->msgout_buf[ahc->msgout_index++] = period; 2508 ahc->msgout_buf[ahc->msgout_index++] = 0; 2509 ahc->msgout_buf[ahc->msgout_index++] = offset; 2510 ahc->msgout_buf[ahc->msgout_index++] = bus_width; 2511 ahc->msgout_buf[ahc->msgout_index++] = ppr_options; 2512 ahc->msgout_len += 8; 2513 if (bootverbose) { 2514 printf("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, " 2515 "offset %x, ppr_options %x\n", ahc_name(ahc), 2516 devinfo->channel, devinfo->target, devinfo->lun, 2517 bus_width, period, offset, ppr_options); 2518 } 2519 } 2520 2521 /* 2522 * Clear any active message state. 2523 */ 2524 static void 2525 ahc_clear_msg_state(struct ahc_softc *ahc) 2526 { 2527 ahc->msgout_len = 0; 2528 ahc->msgin_index = 0; 2529 ahc->msg_type = MSG_TYPE_NONE; 2530 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0) { 2531 /* 2532 * The target didn't care to respond to our 2533 * message request, so clear ATN. 2534 */ 2535 ahc_outb(ahc, CLRSINT1, CLRATNO); 2536 } 2537 ahc_outb(ahc, MSG_OUT, MSG_NOOP); 2538 ahc_outb(ahc, SEQ_FLAGS2, 2539 ahc_inb(ahc, SEQ_FLAGS2) & ~TARGET_MSG_PENDING); 2540 } 2541 2542 static void 2543 ahc_handle_proto_violation(struct ahc_softc *ahc) 2544 { 2545 struct ahc_devinfo devinfo; 2546 struct scb *scb; 2547 u_int scbid; 2548 u_int seq_flags; 2549 u_int curphase; 2550 u_int lastphase; 2551 int found; 2552 2553 ahc_fetch_devinfo(ahc, &devinfo); 2554 scbid = ahc_inb(ahc, SCB_TAG); 2555 scb = ahc_lookup_scb(ahc, scbid); 2556 seq_flags = ahc_inb(ahc, SEQ_FLAGS); 2557 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 2558 lastphase = ahc_inb(ahc, LASTPHASE); 2559 if ((seq_flags & NOT_IDENTIFIED) != 0) { 2560 /* 2561 * The reconnecting target either did not send an 2562 * identify message, or did, but we didn't find an SCB 2563 * to match. 2564 */ 2565 ahc_print_devinfo(ahc, &devinfo); 2566 printf("Target did not send an IDENTIFY message. " 2567 "LASTPHASE = 0x%x.\n", lastphase); 2568 scb = NULL; 2569 } else if (scb == NULL) { 2570 /* 2571 * We don't seem to have an SCB active for this 2572 * transaction. Print an error and reset the bus. 2573 */ 2574 ahc_print_devinfo(ahc, &devinfo); 2575 printf("No SCB found during protocol violation\n"); 2576 goto proto_violation_reset; 2577 } else { 2578 aic_set_transaction_status(scb, CAM_SEQUENCE_FAIL); 2579 if ((seq_flags & NO_CDB_SENT) != 0) { 2580 ahc_print_path(ahc, scb); 2581 printf("No or incomplete CDB sent to device.\n"); 2582 } else if ((ahc_inb(ahc, SCB_CONTROL) & STATUS_RCVD) == 0) { 2583 /* 2584 * The target never bothered to provide status to 2585 * us prior to completing the command. Since we don't 2586 * know the disposition of this command, we must attempt 2587 * to abort it. Assert ATN and prepare to send an abort 2588 * message. 2589 */ 2590 ahc_print_path(ahc, scb); 2591 printf("Completed command without status.\n"); 2592 } else { 2593 ahc_print_path(ahc, scb); 2594 printf("Unknown protocol violation.\n"); 2595 ahc_dump_card_state(ahc); 2596 } 2597 } 2598 if ((lastphase & ~P_DATAIN_DT) == 0 2599 || lastphase == P_COMMAND) { 2600 proto_violation_reset: 2601 /* 2602 * Target either went directly to data/command 2603 * phase or didn't respond to our ATN. 2604 * The only safe thing to do is to blow 2605 * it away with a bus reset. 2606 */ 2607 found = ahc_reset_channel(ahc, 'A', TRUE); 2608 printf("%s: Issued Channel %c Bus Reset. " 2609 "%d SCBs aborted\n", ahc_name(ahc), 'A', found); 2610 } else { 2611 /* 2612 * Leave the selection hardware off in case 2613 * this abort attempt will affect yet to 2614 * be sent commands. 2615 */ 2616 ahc_outb(ahc, SCSISEQ, 2617 ahc_inb(ahc, SCSISEQ) & ~ENSELO); 2618 ahc_assert_atn(ahc); 2619 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2620 if (scb == NULL) { 2621 ahc_print_devinfo(ahc, &devinfo); 2622 ahc->msgout_buf[0] = MSG_ABORT_TASK; 2623 ahc->msgout_len = 1; 2624 ahc->msgout_index = 0; 2625 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 2626 } else { 2627 ahc_print_path(ahc, scb); 2628 scb->flags |= SCB_ABORT; 2629 } 2630 printf("Protocol violation %s. Attempting to abort.\n", 2631 ahc_lookup_phase_entry(curphase)->phasemsg); 2632 } 2633 } 2634 2635 /* 2636 * Manual message loop handler. 2637 */ 2638 static void 2639 ahc_handle_message_phase(struct ahc_softc *ahc) 2640 { 2641 struct ahc_devinfo devinfo; 2642 u_int bus_phase; 2643 int end_session; 2644 2645 ahc_fetch_devinfo(ahc, &devinfo); 2646 end_session = FALSE; 2647 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 2648 2649 reswitch: 2650 switch (ahc->msg_type) { 2651 case MSG_TYPE_INITIATOR_MSGOUT: 2652 { 2653 int lastbyte; 2654 int phasemis; 2655 int msgdone; 2656 2657 if (ahc->msgout_len == 0) 2658 panic("HOST_MSG_LOOP interrupt with no active message"); 2659 2660 #ifdef AHC_DEBUG 2661 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2662 ahc_print_devinfo(ahc, &devinfo); 2663 printf("INITIATOR_MSG_OUT"); 2664 } 2665 #endif 2666 phasemis = bus_phase != P_MESGOUT; 2667 if (phasemis) { 2668 #ifdef AHC_DEBUG 2669 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2670 printf(" PHASEMIS %s\n", 2671 ahc_lookup_phase_entry(bus_phase) 2672 ->phasemsg); 2673 } 2674 #endif 2675 if (bus_phase == P_MESGIN) { 2676 /* 2677 * Change gears and see if 2678 * this messages is of interest to 2679 * us or should be passed back to 2680 * the sequencer. 2681 */ 2682 ahc_outb(ahc, CLRSINT1, CLRATNO); 2683 ahc->send_msg_perror = FALSE; 2684 ahc->msg_type = MSG_TYPE_INITIATOR_MSGIN; 2685 ahc->msgin_index = 0; 2686 goto reswitch; 2687 } 2688 end_session = TRUE; 2689 break; 2690 } 2691 2692 if (ahc->send_msg_perror) { 2693 ahc_outb(ahc, CLRSINT1, CLRATNO); 2694 ahc_outb(ahc, CLRSINT1, CLRREQINIT); 2695 #ifdef AHC_DEBUG 2696 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 2697 printf(" byte 0x%x\n", ahc->send_msg_perror); 2698 #endif 2699 ahc_outb(ahc, SCSIDATL, MSG_PARITY_ERROR); 2700 break; 2701 } 2702 2703 msgdone = ahc->msgout_index == ahc->msgout_len; 2704 if (msgdone) { 2705 /* 2706 * The target has requested a retry. 2707 * Re-assert ATN, reset our message index to 2708 * 0, and try again. 2709 */ 2710 ahc->msgout_index = 0; 2711 ahc_assert_atn(ahc); 2712 } 2713 2714 lastbyte = ahc->msgout_index == (ahc->msgout_len - 1); 2715 if (lastbyte) { 2716 /* Last byte is signified by dropping ATN */ 2717 ahc_outb(ahc, CLRSINT1, CLRATNO); 2718 } 2719 2720 /* 2721 * Clear our interrupt status and present 2722 * the next byte on the bus. 2723 */ 2724 ahc_outb(ahc, CLRSINT1, CLRREQINIT); 2725 #ifdef AHC_DEBUG 2726 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 2727 printf(" byte 0x%x\n", 2728 ahc->msgout_buf[ahc->msgout_index]); 2729 #endif 2730 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]); 2731 break; 2732 } 2733 case MSG_TYPE_INITIATOR_MSGIN: 2734 { 2735 int phasemis; 2736 int message_done; 2737 2738 #ifdef AHC_DEBUG 2739 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2740 ahc_print_devinfo(ahc, &devinfo); 2741 printf("INITIATOR_MSG_IN"); 2742 } 2743 #endif 2744 phasemis = bus_phase != P_MESGIN; 2745 if (phasemis) { 2746 #ifdef AHC_DEBUG 2747 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2748 printf(" PHASEMIS %s\n", 2749 ahc_lookup_phase_entry(bus_phase) 2750 ->phasemsg); 2751 } 2752 #endif 2753 ahc->msgin_index = 0; 2754 if (bus_phase == P_MESGOUT 2755 && (ahc->send_msg_perror == TRUE 2756 || (ahc->msgout_len != 0 2757 && ahc->msgout_index == 0))) { 2758 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 2759 goto reswitch; 2760 } 2761 end_session = TRUE; 2762 break; 2763 } 2764 2765 /* Pull the byte in without acking it */ 2766 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIBUSL); 2767 #ifdef AHC_DEBUG 2768 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 2769 printf(" byte 0x%x\n", 2770 ahc->msgin_buf[ahc->msgin_index]); 2771 #endif 2772 2773 message_done = ahc_parse_msg(ahc, &devinfo); 2774 2775 if (message_done) { 2776 /* 2777 * Clear our incoming message buffer in case there 2778 * is another message following this one. 2779 */ 2780 ahc->msgin_index = 0; 2781 2782 /* 2783 * If this message illicited a response, 2784 * assert ATN so the target takes us to the 2785 * message out phase. 2786 */ 2787 if (ahc->msgout_len != 0) { 2788 #ifdef AHC_DEBUG 2789 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2790 ahc_print_devinfo(ahc, &devinfo); 2791 printf("Asserting ATN for response\n"); 2792 } 2793 #endif 2794 ahc_assert_atn(ahc); 2795 } 2796 } else 2797 ahc->msgin_index++; 2798 2799 if (message_done == MSGLOOP_TERMINATED) { 2800 end_session = TRUE; 2801 } else { 2802 /* Ack the byte */ 2803 ahc_outb(ahc, CLRSINT1, CLRREQINIT); 2804 ahc_inb(ahc, SCSIDATL); 2805 } 2806 break; 2807 } 2808 case MSG_TYPE_TARGET_MSGIN: 2809 { 2810 int msgdone; 2811 2812 if (ahc->msgout_len == 0) 2813 panic("Target MSGIN with no active message"); 2814 2815 #ifdef AHC_DEBUG 2816 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2817 ahc_print_devinfo(ahc, &devinfo); 2818 printf("TARGET_MSG_IN"); 2819 } 2820 #endif 2821 2822 /* 2823 * If we interrupted a mesgout session, the initiator 2824 * will not know this until our first REQ. So, we 2825 * only honor mesgout requests after we've sent our 2826 * first byte. 2827 */ 2828 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0 2829 && ahc->msgout_index > 0) { 2830 /* 2831 * Change gears and see if this messages is 2832 * of interest to us or should be passed back 2833 * to the sequencer. 2834 */ 2835 #ifdef AHC_DEBUG 2836 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 2837 printf(" Honoring ATN Request.\n"); 2838 #endif 2839 ahc->msg_type = MSG_TYPE_TARGET_MSGOUT; 2840 2841 /* 2842 * Disable SCSI Programmed I/O during the 2843 * phase change so as to avoid phantom REQs. 2844 */ 2845 ahc_outb(ahc, SXFRCTL0, 2846 ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); 2847 2848 /* 2849 * Since SPIORDY asserts when ACK is asserted 2850 * for P_MSGOUT, and SPIORDY's assertion triggered 2851 * our entry into this routine, wait for ACK to 2852 * *de-assert* before changing phases. 2853 */ 2854 while ((ahc_inb(ahc, SCSISIGI) & ACKI) != 0) 2855 ; 2856 2857 ahc_outb(ahc, SCSISIGO, P_MESGOUT | BSYO); 2858 2859 /* 2860 * All phase line changes require a bus 2861 * settle delay before REQ is asserted. 2862 * [SCSI SPI4 10.7.1] 2863 */ 2864 ahc_flush_device_writes(ahc); 2865 aic_delay(AHC_BUSSETTLE_DELAY); 2866 2867 ahc->msgin_index = 0; 2868 /* Enable SCSI Programmed I/O to REQ for first byte */ 2869 ahc_outb(ahc, SXFRCTL0, 2870 ahc_inb(ahc, SXFRCTL0) | SPIOEN); 2871 break; 2872 } 2873 2874 msgdone = ahc->msgout_index == ahc->msgout_len; 2875 if (msgdone) { 2876 ahc_outb(ahc, SXFRCTL0, 2877 ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); 2878 end_session = TRUE; 2879 break; 2880 } 2881 2882 /* 2883 * Present the next byte on the bus. 2884 */ 2885 #ifdef AHC_DEBUG 2886 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 2887 printf(" byte 0x%x\n", 2888 ahc->msgout_buf[ahc->msgout_index]); 2889 #endif 2890 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN); 2891 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]); 2892 break; 2893 } 2894 case MSG_TYPE_TARGET_MSGOUT: 2895 { 2896 int lastbyte; 2897 int msgdone; 2898 2899 #ifdef AHC_DEBUG 2900 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2901 ahc_print_devinfo(ahc, &devinfo); 2902 printf("TARGET_MSG_OUT"); 2903 } 2904 #endif 2905 /* 2906 * The initiator signals that this is 2907 * the last byte by dropping ATN. 2908 */ 2909 lastbyte = (ahc_inb(ahc, SCSISIGI) & ATNI) == 0; 2910 2911 /* 2912 * Read the latched byte, but turn off SPIOEN first 2913 * so that we don't inadvertently cause a REQ for the 2914 * next byte. 2915 */ 2916 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); 2917 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIDATL); 2918 2919 #ifdef AHC_DEBUG 2920 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 2921 printf(" byte 0x%x\n", 2922 ahc->msgin_buf[ahc->msgin_index]); 2923 #endif 2924 2925 msgdone = ahc_parse_msg(ahc, &devinfo); 2926 if (msgdone == MSGLOOP_TERMINATED) { 2927 /* 2928 * The message is *really* done in that it caused 2929 * us to go to bus free. The sequencer has already 2930 * been reset at this point, so pull the ejection 2931 * handle. 2932 */ 2933 return; 2934 } 2935 2936 ahc->msgin_index++; 2937 2938 /* 2939 * XXX Read spec about initiator dropping ATN too soon 2940 * and use msgdone to detect it. 2941 */ 2942 if (msgdone == MSGLOOP_MSGCOMPLETE) { 2943 ahc->msgin_index = 0; 2944 2945 /* 2946 * If this message illicited a response, transition 2947 * to the Message in phase and send it. 2948 */ 2949 if (ahc->msgout_len != 0) { 2950 #ifdef AHC_DEBUG 2951 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2952 ahc_print_devinfo(ahc, &devinfo); 2953 printf(" preparing response.\n"); 2954 } 2955 #endif 2956 ahc_outb(ahc, SCSISIGO, P_MESGIN | BSYO); 2957 2958 /* 2959 * All phase line changes require a bus 2960 * settle delay before REQ is asserted. 2961 * [SCSI SPI4 10.7.1] When transitioning 2962 * from an OUT to an IN phase, we must 2963 * also wait a data release delay to allow 2964 * the initiator time to release the data 2965 * lines. [SCSI SPI4 10.12] 2966 */ 2967 ahc_flush_device_writes(ahc); 2968 aic_delay(AHC_BUSSETTLE_DELAY 2969 + AHC_DATARELEASE_DELAY); 2970 2971 /* 2972 * Enable SCSI Programmed I/O. This will 2973 * immediately cause SPIORDY to assert, 2974 * and the sequencer will call our message 2975 * loop again. 2976 */ 2977 ahc_outb(ahc, SXFRCTL0, 2978 ahc_inb(ahc, SXFRCTL0) | SPIOEN); 2979 ahc->msg_type = MSG_TYPE_TARGET_MSGIN; 2980 ahc->msgin_index = 0; 2981 break; 2982 } 2983 } 2984 2985 if (lastbyte) 2986 end_session = TRUE; 2987 else { 2988 /* Ask for the next byte. */ 2989 ahc_outb(ahc, SXFRCTL0, 2990 ahc_inb(ahc, SXFRCTL0) | SPIOEN); 2991 } 2992 2993 break; 2994 } 2995 default: 2996 panic("Unknown REQINIT message type"); 2997 } 2998 2999 if (end_session) { 3000 ahc_clear_msg_state(ahc); 3001 ahc_outb(ahc, RETURN_1, EXIT_MSG_LOOP); 3002 } else 3003 ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP); 3004 } 3005 3006 /* 3007 * See if we sent a particular extended message to the target. 3008 * If "full" is true, return true only if the target saw the full 3009 * message. If "full" is false, return true if the target saw at 3010 * least the first byte of the message. 3011 */ 3012 static int 3013 ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, u_int msgval, int full) 3014 { 3015 int found; 3016 u_int index; 3017 3018 found = FALSE; 3019 index = 0; 3020 3021 while (index < ahc->msgout_len) { 3022 if (ahc->msgout_buf[index] == MSG_EXTENDED) { 3023 u_int end_index; 3024 3025 end_index = index + 1 + ahc->msgout_buf[index + 1]; 3026 if (ahc->msgout_buf[index+2] == msgval 3027 && type == AHCMSG_EXT) { 3028 if (full) { 3029 if (ahc->msgout_index > end_index) 3030 found = TRUE; 3031 } else if (ahc->msgout_index > index) 3032 found = TRUE; 3033 } 3034 index = end_index; 3035 } else if (ahc->msgout_buf[index] >= MSG_SIMPLE_TASK 3036 && ahc->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) { 3037 /* Skip tag type and tag id or residue param*/ 3038 index += 2; 3039 } else { 3040 /* Single byte message */ 3041 if (type == AHCMSG_1B 3042 && ahc->msgout_buf[index] == msgval 3043 && ahc->msgout_index > index) 3044 found = TRUE; 3045 index++; 3046 } 3047 3048 if (found) 3049 break; 3050 } 3051 return (found); 3052 } 3053 3054 /* 3055 * Wait for a complete incoming message, parse it, and respond accordingly. 3056 */ 3057 static int 3058 ahc_parse_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 3059 { 3060 struct ahc_initiator_tinfo *tinfo; 3061 struct ahc_tmode_tstate *tstate; 3062 int reject; 3063 int done; 3064 int response; 3065 u_int targ_scsirate; 3066 3067 done = MSGLOOP_IN_PROG; 3068 response = FALSE; 3069 reject = FALSE; 3070 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 3071 devinfo->target, &tstate); 3072 targ_scsirate = tinfo->scsirate; 3073 3074 /* 3075 * Parse as much of the message as is available, 3076 * rejecting it if we don't support it. When 3077 * the entire message is available and has been 3078 * handled, return MSGLOOP_MSGCOMPLETE, indicating 3079 * that we have parsed an entire message. 3080 * 3081 * In the case of extended messages, we accept the length 3082 * byte outright and perform more checking once we know the 3083 * extended message type. 3084 */ 3085 switch (ahc->msgin_buf[0]) { 3086 case MSG_DISCONNECT: 3087 case MSG_SAVEDATAPOINTER: 3088 case MSG_CMDCOMPLETE: 3089 case MSG_RESTOREPOINTERS: 3090 case MSG_IGN_WIDE_RESIDUE: 3091 /* 3092 * End our message loop as these are messages 3093 * the sequencer handles on its own. 3094 */ 3095 done = MSGLOOP_TERMINATED; 3096 break; 3097 case MSG_MESSAGE_REJECT: 3098 response = ahc_handle_msg_reject(ahc, devinfo); 3099 /* FALLTHROUGH */ 3100 case MSG_NOOP: 3101 done = MSGLOOP_MSGCOMPLETE; 3102 break; 3103 case MSG_EXTENDED: 3104 { 3105 /* Wait for enough of the message to begin validation */ 3106 if (ahc->msgin_index < 2) 3107 break; 3108 switch (ahc->msgin_buf[2]) { 3109 case MSG_EXT_SDTR: 3110 { 3111 struct ahc_syncrate *syncrate; 3112 u_int period; 3113 u_int ppr_options; 3114 u_int offset; 3115 u_int saved_offset; 3116 3117 if (ahc->msgin_buf[1] != MSG_EXT_SDTR_LEN) { 3118 reject = TRUE; 3119 break; 3120 } 3121 3122 /* 3123 * Wait until we have both args before validating 3124 * and acting on this message. 3125 * 3126 * Add one to MSG_EXT_SDTR_LEN to account for 3127 * the extended message preamble. 3128 */ 3129 if (ahc->msgin_index < (MSG_EXT_SDTR_LEN + 1)) 3130 break; 3131 3132 period = ahc->msgin_buf[3]; 3133 ppr_options = 0; 3134 saved_offset = offset = ahc->msgin_buf[4]; 3135 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period, 3136 &ppr_options, 3137 devinfo->role); 3138 ahc_validate_offset(ahc, tinfo, syncrate, &offset, 3139 targ_scsirate & WIDEXFER, 3140 devinfo->role); 3141 if (bootverbose) { 3142 printf("(%s:%c:%d:%d): Received " 3143 "SDTR period %x, offset %x\n\t" 3144 "Filtered to period %x, offset %x\n", 3145 ahc_name(ahc), devinfo->channel, 3146 devinfo->target, devinfo->lun, 3147 ahc->msgin_buf[3], saved_offset, 3148 period, offset); 3149 } 3150 ahc_set_syncrate(ahc, devinfo, 3151 syncrate, period, 3152 offset, ppr_options, 3153 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3154 /*paused*/TRUE); 3155 3156 /* 3157 * See if we initiated Sync Negotiation 3158 * and didn't have to fall down to async 3159 * transfers. 3160 */ 3161 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, TRUE)) { 3162 /* We started it */ 3163 if (saved_offset != offset) { 3164 /* Went too low - force async */ 3165 reject = TRUE; 3166 } 3167 } else { 3168 /* 3169 * Send our own SDTR in reply 3170 */ 3171 if (bootverbose 3172 && devinfo->role == ROLE_INITIATOR) { 3173 printf("(%s:%c:%d:%d): Target " 3174 "Initiated SDTR\n", 3175 ahc_name(ahc), devinfo->channel, 3176 devinfo->target, devinfo->lun); 3177 } 3178 ahc->msgout_index = 0; 3179 ahc->msgout_len = 0; 3180 ahc_construct_sdtr(ahc, devinfo, 3181 period, offset); 3182 ahc->msgout_index = 0; 3183 response = TRUE; 3184 } 3185 done = MSGLOOP_MSGCOMPLETE; 3186 break; 3187 } 3188 case MSG_EXT_WDTR: 3189 { 3190 u_int bus_width; 3191 u_int saved_width; 3192 u_int sending_reply; 3193 3194 sending_reply = FALSE; 3195 if (ahc->msgin_buf[1] != MSG_EXT_WDTR_LEN) { 3196 reject = TRUE; 3197 break; 3198 } 3199 3200 /* 3201 * Wait until we have our arg before validating 3202 * and acting on this message. 3203 * 3204 * Add one to MSG_EXT_WDTR_LEN to account for 3205 * the extended message preamble. 3206 */ 3207 if (ahc->msgin_index < (MSG_EXT_WDTR_LEN + 1)) 3208 break; 3209 3210 bus_width = ahc->msgin_buf[3]; 3211 saved_width = bus_width; 3212 ahc_validate_width(ahc, tinfo, &bus_width, 3213 devinfo->role); 3214 if (bootverbose) { 3215 printf("(%s:%c:%d:%d): Received WDTR " 3216 "%x filtered to %x\n", 3217 ahc_name(ahc), devinfo->channel, 3218 devinfo->target, devinfo->lun, 3219 saved_width, bus_width); 3220 } 3221 3222 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, TRUE)) { 3223 /* 3224 * Don't send a WDTR back to the 3225 * target, since we asked first. 3226 * If the width went higher than our 3227 * request, reject it. 3228 */ 3229 if (saved_width > bus_width) { 3230 reject = TRUE; 3231 printf("(%s:%c:%d:%d): requested %dBit " 3232 "transfers. Rejecting...\n", 3233 ahc_name(ahc), devinfo->channel, 3234 devinfo->target, devinfo->lun, 3235 8 * (0x01 << bus_width)); 3236 bus_width = 0; 3237 } 3238 } else { 3239 /* 3240 * Send our own WDTR in reply 3241 */ 3242 if (bootverbose 3243 && devinfo->role == ROLE_INITIATOR) { 3244 printf("(%s:%c:%d:%d): Target " 3245 "Initiated WDTR\n", 3246 ahc_name(ahc), devinfo->channel, 3247 devinfo->target, devinfo->lun); 3248 } 3249 ahc->msgout_index = 0; 3250 ahc->msgout_len = 0; 3251 ahc_construct_wdtr(ahc, devinfo, bus_width); 3252 ahc->msgout_index = 0; 3253 response = TRUE; 3254 sending_reply = TRUE; 3255 } 3256 /* 3257 * After a wide message, we are async, but 3258 * some devices don't seem to honor this portion 3259 * of the spec. Force a renegotiation of the 3260 * sync component of our transfer agreement even 3261 * if our goal is async. By updating our width 3262 * after forcing the negotiation, we avoid 3263 * renegotiating for width. 3264 */ 3265 ahc_update_neg_request(ahc, devinfo, tstate, 3266 tinfo, AHC_NEG_ALWAYS); 3267 ahc_set_width(ahc, devinfo, bus_width, 3268 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3269 /*paused*/TRUE); 3270 if (sending_reply == FALSE && reject == FALSE) { 3271 /* 3272 * We will always have an SDTR to send. 3273 */ 3274 ahc->msgout_index = 0; 3275 ahc->msgout_len = 0; 3276 ahc_build_transfer_msg(ahc, devinfo); 3277 ahc->msgout_index = 0; 3278 response = TRUE; 3279 } 3280 done = MSGLOOP_MSGCOMPLETE; 3281 break; 3282 } 3283 case MSG_EXT_PPR: 3284 { 3285 struct ahc_syncrate *syncrate; 3286 u_int period; 3287 u_int offset; 3288 u_int bus_width; 3289 u_int ppr_options; 3290 u_int saved_width; 3291 u_int saved_offset; 3292 u_int saved_ppr_options; 3293 3294 if (ahc->msgin_buf[1] != MSG_EXT_PPR_LEN) { 3295 reject = TRUE; 3296 break; 3297 } 3298 3299 /* 3300 * Wait until we have all args before validating 3301 * and acting on this message. 3302 * 3303 * Add one to MSG_EXT_PPR_LEN to account for 3304 * the extended message preamble. 3305 */ 3306 if (ahc->msgin_index < (MSG_EXT_PPR_LEN + 1)) 3307 break; 3308 3309 period = ahc->msgin_buf[3]; 3310 offset = ahc->msgin_buf[5]; 3311 bus_width = ahc->msgin_buf[6]; 3312 saved_width = bus_width; 3313 ppr_options = ahc->msgin_buf[7]; 3314 /* 3315 * According to the spec, a DT only 3316 * period factor with no DT option 3317 * set implies async. 3318 */ 3319 if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0 3320 && period == 9) 3321 offset = 0; 3322 saved_ppr_options = ppr_options; 3323 saved_offset = offset; 3324 3325 /* 3326 * Mask out any options we don't support 3327 * on any controller. Transfer options are 3328 * only available if we are negotiating wide. 3329 */ 3330 ppr_options &= MSG_EXT_PPR_DT_REQ; 3331 if (bus_width == 0) 3332 ppr_options = 0; 3333 3334 ahc_validate_width(ahc, tinfo, &bus_width, 3335 devinfo->role); 3336 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period, 3337 &ppr_options, 3338 devinfo->role); 3339 ahc_validate_offset(ahc, tinfo, syncrate, 3340 &offset, bus_width, 3341 devinfo->role); 3342 3343 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, TRUE)) { 3344 /* 3345 * If we are unable to do any of the 3346 * requested options (we went too low), 3347 * then we'll have to reject the message. 3348 */ 3349 if (saved_width > bus_width 3350 || saved_offset != offset 3351 || saved_ppr_options != ppr_options) { 3352 reject = TRUE; 3353 period = 0; 3354 offset = 0; 3355 bus_width = 0; 3356 ppr_options = 0; 3357 syncrate = NULL; 3358 } 3359 } else { 3360 if (devinfo->role != ROLE_TARGET) 3361 printf("(%s:%c:%d:%d): Target " 3362 "Initiated PPR\n", 3363 ahc_name(ahc), devinfo->channel, 3364 devinfo->target, devinfo->lun); 3365 else 3366 printf("(%s:%c:%d:%d): Initiator " 3367 "Initiated PPR\n", 3368 ahc_name(ahc), devinfo->channel, 3369 devinfo->target, devinfo->lun); 3370 ahc->msgout_index = 0; 3371 ahc->msgout_len = 0; 3372 ahc_construct_ppr(ahc, devinfo, period, offset, 3373 bus_width, ppr_options); 3374 ahc->msgout_index = 0; 3375 response = TRUE; 3376 } 3377 if (bootverbose) { 3378 printf("(%s:%c:%d:%d): Received PPR width %x, " 3379 "period %x, offset %x,options %x\n" 3380 "\tFiltered to width %x, period %x, " 3381 "offset %x, options %x\n", 3382 ahc_name(ahc), devinfo->channel, 3383 devinfo->target, devinfo->lun, 3384 saved_width, ahc->msgin_buf[3], 3385 saved_offset, saved_ppr_options, 3386 bus_width, period, offset, ppr_options); 3387 } 3388 ahc_set_width(ahc, devinfo, bus_width, 3389 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3390 /*paused*/TRUE); 3391 ahc_set_syncrate(ahc, devinfo, 3392 syncrate, period, 3393 offset, ppr_options, 3394 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3395 /*paused*/TRUE); 3396 done = MSGLOOP_MSGCOMPLETE; 3397 break; 3398 } 3399 default: 3400 /* Unknown extended message. Reject it. */ 3401 reject = TRUE; 3402 break; 3403 } 3404 break; 3405 } 3406 #ifdef AHC_TARGET_MODE 3407 case MSG_BUS_DEV_RESET: 3408 ahc_handle_devreset(ahc, devinfo, 3409 CAM_BDR_SENT, 3410 "Bus Device Reset Received", 3411 /*verbose_level*/0); 3412 ahc_restart(ahc); 3413 done = MSGLOOP_TERMINATED; 3414 break; 3415 case MSG_ABORT_TAG: 3416 case MSG_ABORT: 3417 case MSG_CLEAR_QUEUE: 3418 { 3419 int tag; 3420 3421 /* Target mode messages */ 3422 if (devinfo->role != ROLE_TARGET) { 3423 reject = TRUE; 3424 break; 3425 } 3426 tag = SCB_LIST_NULL; 3427 if (ahc->msgin_buf[0] == MSG_ABORT_TAG) 3428 tag = ahc_inb(ahc, INITIATOR_TAG); 3429 ahc_abort_scbs(ahc, devinfo->target, devinfo->channel, 3430 devinfo->lun, tag, ROLE_TARGET, 3431 CAM_REQ_ABORTED); 3432 3433 tstate = ahc->enabled_targets[devinfo->our_scsiid]; 3434 if (tstate != NULL) { 3435 struct ahc_tmode_lstate* lstate; 3436 3437 lstate = tstate->enabled_luns[devinfo->lun]; 3438 if (lstate != NULL) { 3439 ahc_queue_lstate_event(ahc, lstate, 3440 devinfo->our_scsiid, 3441 ahc->msgin_buf[0], 3442 /*arg*/tag); 3443 ahc_send_lstate_events(ahc, lstate); 3444 } 3445 } 3446 ahc_restart(ahc); 3447 done = MSGLOOP_TERMINATED; 3448 break; 3449 } 3450 #endif 3451 case MSG_TERM_IO_PROC: 3452 default: 3453 reject = TRUE; 3454 break; 3455 } 3456 3457 if (reject) { 3458 /* 3459 * Setup to reject the message. 3460 */ 3461 ahc->msgout_index = 0; 3462 ahc->msgout_len = 1; 3463 ahc->msgout_buf[0] = MSG_MESSAGE_REJECT; 3464 done = MSGLOOP_MSGCOMPLETE; 3465 response = TRUE; 3466 } 3467 3468 if (done != MSGLOOP_IN_PROG && !response) 3469 /* Clear the outgoing message buffer */ 3470 ahc->msgout_len = 0; 3471 3472 return (done); 3473 } 3474 3475 /* 3476 * Process a message reject message. 3477 */ 3478 static int 3479 ahc_handle_msg_reject(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 3480 { 3481 /* 3482 * What we care about here is if we had an 3483 * outstanding SDTR or WDTR message for this 3484 * target. If we did, this is a signal that 3485 * the target is refusing negotiation. 3486 */ 3487 struct scb *scb; 3488 struct ahc_initiator_tinfo *tinfo; 3489 struct ahc_tmode_tstate *tstate; 3490 u_int scb_index; 3491 u_int last_msg; 3492 int response = 0; 3493 3494 scb_index = ahc_inb(ahc, SCB_TAG); 3495 scb = ahc_lookup_scb(ahc, scb_index); 3496 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, 3497 devinfo->our_scsiid, 3498 devinfo->target, &tstate); 3499 /* Might be necessary */ 3500 last_msg = ahc_inb(ahc, LAST_MSG); 3501 3502 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, /*full*/FALSE)) { 3503 /* 3504 * Target does not support the PPR message. 3505 * Attempt to negotiate SPI-2 style. 3506 */ 3507 if (bootverbose) { 3508 printf("(%s:%c:%d:%d): PPR Rejected. " 3509 "Trying WDTR/SDTR\n", 3510 ahc_name(ahc), devinfo->channel, 3511 devinfo->target, devinfo->lun); 3512 } 3513 tinfo->goal.ppr_options = 0; 3514 tinfo->curr.transport_version = 2; 3515 tinfo->goal.transport_version = 2; 3516 ahc->msgout_index = 0; 3517 ahc->msgout_len = 0; 3518 ahc_build_transfer_msg(ahc, devinfo); 3519 ahc->msgout_index = 0; 3520 response = 1; 3521 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, /*full*/FALSE)) { 3522 /* note 8bit xfers */ 3523 printf("(%s:%c:%d:%d): refuses WIDE negotiation. Using " 3524 "8bit transfers\n", ahc_name(ahc), 3525 devinfo->channel, devinfo->target, devinfo->lun); 3526 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT, 3527 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3528 /*paused*/TRUE); 3529 /* 3530 * No need to clear the sync rate. If the target 3531 * did not accept the command, our syncrate is 3532 * unaffected. If the target started the negotiation, 3533 * but rejected our response, we already cleared the 3534 * sync rate before sending our WDTR. 3535 */ 3536 if (tinfo->goal.offset != tinfo->curr.offset) { 3537 /* Start the sync negotiation */ 3538 ahc->msgout_index = 0; 3539 ahc->msgout_len = 0; 3540 ahc_build_transfer_msg(ahc, devinfo); 3541 ahc->msgout_index = 0; 3542 response = 1; 3543 } 3544 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, /*full*/FALSE)) { 3545 /* note asynch xfers and clear flag */ 3546 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0, 3547 /*offset*/0, /*ppr_options*/0, 3548 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3549 /*paused*/TRUE); 3550 printf("(%s:%c:%d:%d): refuses synchronous negotiation. " 3551 "Using asynchronous transfers\n", 3552 ahc_name(ahc), devinfo->channel, 3553 devinfo->target, devinfo->lun); 3554 } else if ((scb->hscb->control & MSG_SIMPLE_TASK) != 0) { 3555 int tag_type; 3556 int mask; 3557 3558 tag_type = (scb->hscb->control & MSG_SIMPLE_TASK); 3559 3560 if (tag_type == MSG_SIMPLE_TASK) { 3561 printf("(%s:%c:%d:%d): refuses tagged commands. " 3562 "Performing non-tagged I/O\n", ahc_name(ahc), 3563 devinfo->channel, devinfo->target, devinfo->lun); 3564 ahc_set_tags(ahc, devinfo, AHC_QUEUE_NONE); 3565 mask = ~0x23; 3566 } else { 3567 printf("(%s:%c:%d:%d): refuses %s tagged commands. " 3568 "Performing simple queue tagged I/O only\n", 3569 ahc_name(ahc), devinfo->channel, devinfo->target, 3570 devinfo->lun, tag_type == MSG_ORDERED_TASK 3571 ? "ordered" : "head of queue"); 3572 ahc_set_tags(ahc, devinfo, AHC_QUEUE_BASIC); 3573 mask = ~0x03; 3574 } 3575 3576 /* 3577 * Resend the identify for this CCB as the target 3578 * may believe that the selection is invalid otherwise. 3579 */ 3580 ahc_outb(ahc, SCB_CONTROL, 3581 ahc_inb(ahc, SCB_CONTROL) & mask); 3582 scb->hscb->control &= mask; 3583 aic_set_transaction_tag(scb, /*enabled*/FALSE, 3584 /*type*/MSG_SIMPLE_TASK); 3585 ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG); 3586 ahc_assert_atn(ahc); 3587 3588 /* 3589 * This transaction is now at the head of 3590 * the untagged queue for this target. 3591 */ 3592 if ((ahc->flags & AHC_SCB_BTT) == 0) { 3593 struct scb_tailq *untagged_q; 3594 3595 untagged_q = 3596 &(ahc->untagged_queues[devinfo->target_offset]); 3597 TAILQ_INSERT_HEAD(untagged_q, scb, links.tqe); 3598 scb->flags |= SCB_UNTAGGEDQ; 3599 } 3600 ahc_busy_tcl(ahc, BUILD_TCL(scb->hscb->scsiid, devinfo->lun), 3601 scb->hscb->tag); 3602 3603 /* 3604 * Requeue all tagged commands for this target 3605 * currently in our possession so they can be 3606 * converted to untagged commands. 3607 */ 3608 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb), 3609 SCB_GET_CHANNEL(ahc, scb), 3610 SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL, 3611 ROLE_INITIATOR, CAM_REQUEUE_REQ, 3612 SEARCH_COMPLETE); 3613 } else { 3614 /* 3615 * Otherwise, we ignore it. 3616 */ 3617 printf("%s:%c:%d: Message reject for %x -- ignored\n", 3618 ahc_name(ahc), devinfo->channel, devinfo->target, 3619 last_msg); 3620 } 3621 return (response); 3622 } 3623 3624 /* 3625 * Process an ignore wide residue message. 3626 */ 3627 static void 3628 ahc_handle_ign_wide_residue(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 3629 { 3630 u_int scb_index; 3631 struct scb *scb; 3632 3633 scb_index = ahc_inb(ahc, SCB_TAG); 3634 scb = ahc_lookup_scb(ahc, scb_index); 3635 /* 3636 * XXX Actually check data direction in the sequencer? 3637 * Perhaps add datadir to some spare bits in the hscb? 3638 */ 3639 if ((ahc_inb(ahc, SEQ_FLAGS) & DPHASE) == 0 3640 || aic_get_transfer_dir(scb) != CAM_DIR_IN) { 3641 /* 3642 * Ignore the message if we haven't 3643 * seen an appropriate data phase yet. 3644 */ 3645 } else { 3646 /* 3647 * If the residual occurred on the last 3648 * transfer and the transfer request was 3649 * expected to end on an odd count, do 3650 * nothing. Otherwise, subtract a byte 3651 * and update the residual count accordingly. 3652 */ 3653 uint32_t sgptr; 3654 3655 sgptr = ahc_inb(ahc, SCB_RESIDUAL_SGPTR); 3656 if ((sgptr & SG_LIST_NULL) != 0 3657 && (ahc_inb(ahc, SCB_LUN) & SCB_XFERLEN_ODD) != 0) { 3658 /* 3659 * If the residual occurred on the last 3660 * transfer and the transfer request was 3661 * expected to end on an odd count, do 3662 * nothing. 3663 */ 3664 } else { 3665 struct ahc_dma_seg *sg; 3666 uint32_t data_cnt; 3667 uint32_t sglen; 3668 3669 /* Pull in all of the sgptr */ 3670 sgptr = ahc_inl(ahc, SCB_RESIDUAL_SGPTR); 3671 data_cnt = ahc_inl(ahc, SCB_RESIDUAL_DATACNT); 3672 3673 if ((sgptr & SG_LIST_NULL) != 0) { 3674 /* 3675 * The residual data count is not updated 3676 * for the command run to completion case. 3677 * Explicitly zero the count. 3678 */ 3679 data_cnt &= ~AHC_SG_LEN_MASK; 3680 } 3681 3682 data_cnt += 1; 3683 sgptr &= SG_PTR_MASK; 3684 3685 sg = ahc_sg_bus_to_virt(scb, sgptr); 3686 3687 /* 3688 * The residual sg ptr points to the next S/G 3689 * to load so we must go back one. 3690 */ 3691 sg--; 3692 sglen = aic_le32toh(sg->len) & AHC_SG_LEN_MASK; 3693 if (sg != scb->sg_list 3694 && sglen < (data_cnt & AHC_SG_LEN_MASK)) { 3695 sg--; 3696 sglen = aic_le32toh(sg->len); 3697 /* 3698 * Preserve High Address and SG_LIST bits 3699 * while setting the count to 1. 3700 */ 3701 data_cnt = 1 | (sglen & (~AHC_SG_LEN_MASK)); 3702 3703 /* 3704 * Increment sg so it points to the 3705 * "next" sg. 3706 */ 3707 sg++; 3708 sgptr = ahc_sg_virt_to_bus(scb, sg); 3709 } 3710 ahc_outl(ahc, SCB_RESIDUAL_SGPTR, sgptr); 3711 ahc_outl(ahc, SCB_RESIDUAL_DATACNT, data_cnt); 3712 /* 3713 * Toggle the "oddness" of the transfer length 3714 * to handle this mid-transfer ignore wide 3715 * residue. This ensures that the oddness is 3716 * correct for subsequent data transfers. 3717 */ 3718 ahc_outb(ahc, SCB_LUN, 3719 ahc_inb(ahc, SCB_LUN) ^ SCB_XFERLEN_ODD); 3720 } 3721 } 3722 } 3723 3724 /* 3725 * Reinitialize the data pointers for the active transfer 3726 * based on its current residual. 3727 */ 3728 static void 3729 ahc_reinitialize_dataptrs(struct ahc_softc *ahc) 3730 { 3731 struct scb *scb; 3732 struct ahc_dma_seg *sg; 3733 u_int scb_index; 3734 uint32_t sgptr; 3735 uint32_t resid; 3736 uint32_t dataptr; 3737 3738 scb_index = ahc_inb(ahc, SCB_TAG); 3739 scb = ahc_lookup_scb(ahc, scb_index); 3740 sgptr = (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24) 3741 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16) 3742 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8) 3743 | ahc_inb(ahc, SCB_RESIDUAL_SGPTR); 3744 3745 sgptr &= SG_PTR_MASK; 3746 sg = ahc_sg_bus_to_virt(scb, sgptr); 3747 3748 /* The residual sg_ptr always points to the next sg */ 3749 sg--; 3750 3751 resid = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 2) << 16) 3752 | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 1) << 8) 3753 | ahc_inb(ahc, SCB_RESIDUAL_DATACNT); 3754 3755 dataptr = aic_le32toh(sg->addr) 3756 + (aic_le32toh(sg->len) & AHC_SG_LEN_MASK) 3757 - resid; 3758 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) { 3759 u_int dscommand1; 3760 3761 dscommand1 = ahc_inb(ahc, DSCOMMAND1); 3762 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0); 3763 ahc_outb(ahc, HADDR, 3764 (aic_le32toh(sg->len) >> 24) & SG_HIGH_ADDR_BITS); 3765 ahc_outb(ahc, DSCOMMAND1, dscommand1); 3766 } 3767 ahc_outb(ahc, HADDR + 3, dataptr >> 24); 3768 ahc_outb(ahc, HADDR + 2, dataptr >> 16); 3769 ahc_outb(ahc, HADDR + 1, dataptr >> 8); 3770 ahc_outb(ahc, HADDR, dataptr); 3771 ahc_outb(ahc, HCNT + 2, resid >> 16); 3772 ahc_outb(ahc, HCNT + 1, resid >> 8); 3773 ahc_outb(ahc, HCNT, resid); 3774 if ((ahc->features & AHC_ULTRA2) == 0) { 3775 ahc_outb(ahc, STCNT + 2, resid >> 16); 3776 ahc_outb(ahc, STCNT + 1, resid >> 8); 3777 ahc_outb(ahc, STCNT, resid); 3778 } 3779 } 3780 3781 /* 3782 * Handle the effects of issuing a bus device reset message. 3783 */ 3784 static void 3785 ahc_handle_devreset(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 3786 cam_status status, char *message, int verbose_level) 3787 { 3788 #ifdef AHC_TARGET_MODE 3789 struct ahc_tmode_tstate* tstate; 3790 u_int lun; 3791 #endif 3792 int found; 3793 3794 found = ahc_abort_scbs(ahc, devinfo->target, devinfo->channel, 3795 CAM_LUN_WILDCARD, SCB_LIST_NULL, devinfo->role, 3796 status); 3797 3798 #ifdef AHC_TARGET_MODE 3799 /* 3800 * Send an immediate notify ccb to all target mord peripheral 3801 * drivers affected by this action. 3802 */ 3803 tstate = ahc->enabled_targets[devinfo->our_scsiid]; 3804 if (tstate != NULL) { 3805 for (lun = 0; lun < AHC_NUM_LUNS; lun++) { 3806 struct ahc_tmode_lstate* lstate; 3807 3808 lstate = tstate->enabled_luns[lun]; 3809 if (lstate == NULL) 3810 continue; 3811 3812 ahc_queue_lstate_event(ahc, lstate, devinfo->our_scsiid, 3813 MSG_BUS_DEV_RESET, /*arg*/0); 3814 ahc_send_lstate_events(ahc, lstate); 3815 } 3816 } 3817 #endif 3818 3819 /* 3820 * Go back to async/narrow transfers and renegotiate. 3821 */ 3822 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT, 3823 AHC_TRANS_CUR, /*paused*/TRUE); 3824 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, 3825 /*period*/0, /*offset*/0, /*ppr_options*/0, 3826 AHC_TRANS_CUR, /*paused*/TRUE); 3827 3828 if (status != CAM_SEL_TIMEOUT) 3829 ahc_send_async(ahc, devinfo->channel, devinfo->target, 3830 CAM_LUN_WILDCARD, AC_SENT_BDR, NULL); 3831 3832 if (message != NULL 3833 && (verbose_level <= bootverbose)) 3834 printf("%s: %s on %c:%d. %d SCBs aborted\n", ahc_name(ahc), 3835 message, devinfo->channel, devinfo->target, found); 3836 } 3837 3838 #ifdef AHC_TARGET_MODE 3839 static void 3840 ahc_setup_target_msgin(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 3841 struct scb *scb) 3842 { 3843 3844 /* 3845 * To facilitate adding multiple messages together, 3846 * each routine should increment the index and len 3847 * variables instead of setting them explicitly. 3848 */ 3849 ahc->msgout_index = 0; 3850 ahc->msgout_len = 0; 3851 3852 if (scb != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 0) 3853 ahc_build_transfer_msg(ahc, devinfo); 3854 else 3855 panic("ahc_intr: AWAITING target message with no message"); 3856 3857 ahc->msgout_index = 0; 3858 ahc->msg_type = MSG_TYPE_TARGET_MSGIN; 3859 } 3860 #endif 3861 /**************************** Initialization **********************************/ 3862 /* 3863 * Allocate a controller structure for a new device 3864 * and perform initial initializion. 3865 */ 3866 struct ahc_softc * 3867 ahc_alloc(void *platform_arg, char *name) 3868 { 3869 struct ahc_softc *ahc; 3870 int i; 3871 3872 ahc = device_get_softc((device_t)platform_arg); 3873 memset(ahc, 0, sizeof(*ahc)); 3874 ahc->seep_config = malloc(sizeof(*ahc->seep_config), 3875 M_DEVBUF, M_NOWAIT); 3876 if (ahc->seep_config == NULL) { 3877 free(name, M_DEVBUF); 3878 return (NULL); 3879 } 3880 LIST_INIT(&ahc->pending_scbs); 3881 LIST_INIT(&ahc->timedout_scbs); 3882 /* We don't know our unit number until the OSM sets it */ 3883 ahc->name = name; 3884 ahc->unit = -1; 3885 ahc->description = NULL; 3886 ahc->channel = 'A'; 3887 ahc->channel_b = 'B'; 3888 ahc->chip = AHC_NONE; 3889 ahc->features = AHC_FENONE; 3890 ahc->bugs = AHC_BUGNONE; 3891 ahc->flags = AHC_FNONE; 3892 /* 3893 * Default to all error reporting enabled with the 3894 * sequencer operating at its fastest speed. 3895 * The bus attach code may modify this. 3896 */ 3897 ahc->seqctl = FASTMODE; 3898 3899 for (i = 0; i < AHC_NUM_TARGETS; i++) 3900 TAILQ_INIT(&ahc->untagged_queues[i]); 3901 if (ahc_platform_alloc(ahc, platform_arg) != 0) { 3902 ahc_free(ahc); 3903 ahc = NULL; 3904 } 3905 ahc_lockinit(ahc); 3906 return (ahc); 3907 } 3908 3909 int 3910 ahc_softc_init(struct ahc_softc *ahc) 3911 { 3912 3913 /* The IRQMS bit is only valid on VL and EISA chips */ 3914 if ((ahc->chip & AHC_PCI) == 0) 3915 ahc->unpause = ahc_inb(ahc, HCNTRL) & IRQMS; 3916 else 3917 ahc->unpause = 0; 3918 ahc->pause = ahc->unpause | PAUSE; 3919 /* XXX The shared scb data stuff should be deprecated */ 3920 if (ahc->scb_data == NULL) { 3921 ahc->scb_data = malloc(sizeof(*ahc->scb_data), 3922 M_DEVBUF, M_NOWAIT); 3923 if (ahc->scb_data == NULL) 3924 return (ENOMEM); 3925 memset(ahc->scb_data, 0, sizeof(*ahc->scb_data)); 3926 } 3927 3928 return (0); 3929 } 3930 3931 void 3932 ahc_softc_insert(struct ahc_softc *ahc) 3933 { 3934 struct ahc_softc *list_ahc; 3935 3936 #if AIC_PCI_CONFIG > 0 3937 /* 3938 * Second Function PCI devices need to inherit some 3939 * settings from function 0. 3940 */ 3941 if ((ahc->chip & AHC_BUS_MASK) == AHC_PCI 3942 && (ahc->features & AHC_MULTI_FUNC) != 0) { 3943 TAILQ_FOREACH(list_ahc, &ahc_tailq, links) { 3944 aic_dev_softc_t list_pci; 3945 aic_dev_softc_t pci; 3946 3947 list_pci = list_ahc->dev_softc; 3948 pci = ahc->dev_softc; 3949 if (aic_get_pci_slot(list_pci) == aic_get_pci_slot(pci) 3950 && aic_get_pci_bus(list_pci) == aic_get_pci_bus(pci)) { 3951 struct ahc_softc *master; 3952 struct ahc_softc *slave; 3953 3954 if (aic_get_pci_function(list_pci) == 0) { 3955 master = list_ahc; 3956 slave = ahc; 3957 } else { 3958 master = ahc; 3959 slave = list_ahc; 3960 } 3961 slave->flags &= ~AHC_BIOS_ENABLED; 3962 slave->flags |= 3963 master->flags & AHC_BIOS_ENABLED; 3964 slave->flags &= ~AHC_PRIMARY_CHANNEL; 3965 slave->flags |= 3966 master->flags & AHC_PRIMARY_CHANNEL; 3967 break; 3968 } 3969 } 3970 } 3971 #endif 3972 3973 /* 3974 * Insertion sort into our list of softcs. 3975 */ 3976 list_ahc = TAILQ_FIRST(&ahc_tailq); 3977 while (list_ahc != NULL 3978 && ahc_softc_comp(ahc, list_ahc) <= 0) 3979 list_ahc = TAILQ_NEXT(list_ahc, links); 3980 if (list_ahc != NULL) 3981 TAILQ_INSERT_BEFORE(list_ahc, ahc, links); 3982 else 3983 TAILQ_INSERT_TAIL(&ahc_tailq, ahc, links); 3984 ahc->init_level++; 3985 } 3986 3987 void 3988 ahc_set_unit(struct ahc_softc *ahc, int unit) 3989 { 3990 ahc->unit = unit; 3991 } 3992 3993 void 3994 ahc_set_name(struct ahc_softc *ahc, char *name) 3995 { 3996 if (ahc->name != NULL) 3997 free(ahc->name, M_DEVBUF); 3998 ahc->name = name; 3999 } 4000 4001 void 4002 ahc_free(struct ahc_softc *ahc) 4003 { 4004 int i; 4005 4006 ahc_terminate_recovery_thread(ahc); 4007 switch (ahc->init_level) { 4008 default: 4009 case 5: 4010 ahc_shutdown(ahc); 4011 /* FALLTHROUGH */ 4012 case 4: 4013 aic_dmamap_unload(ahc, ahc->shared_data_dmat, 4014 ahc->shared_data_dmamap); 4015 /* FALLTHROUGH */ 4016 case 3: 4017 aic_dmamem_free(ahc, ahc->shared_data_dmat, ahc->qoutfifo, 4018 ahc->shared_data_dmamap); 4019 /* FALLTHROUGH */ 4020 case 2: 4021 aic_dma_tag_destroy(ahc, ahc->shared_data_dmat); 4022 case 1: 4023 aic_dma_tag_destroy(ahc, ahc->buffer_dmat); 4024 break; 4025 case 0: 4026 break; 4027 } 4028 4029 aic_dma_tag_destroy(ahc, ahc->parent_dmat); 4030 ahc_platform_free(ahc); 4031 ahc_fini_scbdata(ahc); 4032 for (i = 0; i < AHC_NUM_TARGETS; i++) { 4033 struct ahc_tmode_tstate *tstate; 4034 4035 tstate = ahc->enabled_targets[i]; 4036 if (tstate != NULL) { 4037 #ifdef AHC_TARGET_MODE 4038 int j; 4039 4040 for (j = 0; j < AHC_NUM_LUNS; j++) { 4041 struct ahc_tmode_lstate *lstate; 4042 4043 lstate = tstate->enabled_luns[j]; 4044 if (lstate != NULL) { 4045 xpt_free_path(lstate->path); 4046 free(lstate, M_DEVBUF); 4047 } 4048 } 4049 #endif 4050 free(tstate, M_DEVBUF); 4051 } 4052 } 4053 #ifdef AHC_TARGET_MODE 4054 if (ahc->black_hole != NULL) { 4055 xpt_free_path(ahc->black_hole->path); 4056 free(ahc->black_hole, M_DEVBUF); 4057 } 4058 #endif 4059 if (ahc->name != NULL) 4060 free(ahc->name, M_DEVBUF); 4061 if (ahc->seep_config != NULL) 4062 free(ahc->seep_config, M_DEVBUF); 4063 return; 4064 } 4065 4066 void 4067 ahc_shutdown(void *arg) 4068 { 4069 struct ahc_softc *ahc; 4070 int i; 4071 4072 ahc = (struct ahc_softc *)arg; 4073 4074 /* This will reset most registers to 0, but not all */ 4075 ahc_reset(ahc, /*reinit*/FALSE); 4076 ahc_outb(ahc, SCSISEQ, 0); 4077 ahc_outb(ahc, SXFRCTL0, 0); 4078 ahc_outb(ahc, DSPCISTATUS, 0); 4079 4080 for (i = TARG_SCSIRATE; i < SCSICONF; i++) 4081 ahc_outb(ahc, i, 0); 4082 } 4083 4084 /* 4085 * Reset the controller and record some information about it 4086 * that is only available just after a reset. If "reinit" is 4087 * non-zero, this reset occurred after initial configuration 4088 * and the caller requests that the chip be fully reinitialized 4089 * to a runable state. Chip interrupts are *not* enabled after 4090 * a reinitialization. The caller must enable interrupts via 4091 * ahc_intr_enable(). 4092 */ 4093 int 4094 ahc_reset(struct ahc_softc *ahc, int reinit) 4095 { 4096 u_int sblkctl; 4097 u_int sxfrctl1_a, sxfrctl1_b; 4098 int error; 4099 int wait; 4100 4101 /* 4102 * Preserve the value of the SXFRCTL1 register for all channels. 4103 * It contains settings that affect termination and we don't want 4104 * to disturb the integrity of the bus. 4105 */ 4106 ahc_pause(ahc); 4107 sxfrctl1_b = 0; 4108 if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7770) { 4109 u_int sblkctl; 4110 4111 /* 4112 * Save channel B's settings in case this chip 4113 * is setup for TWIN channel operation. 4114 */ 4115 sblkctl = ahc_inb(ahc, SBLKCTL); 4116 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB); 4117 sxfrctl1_b = ahc_inb(ahc, SXFRCTL1); 4118 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB); 4119 } 4120 sxfrctl1_a = ahc_inb(ahc, SXFRCTL1); 4121 4122 ahc_outb(ahc, HCNTRL, CHIPRST | ahc->pause); 4123 4124 /* 4125 * Ensure that the reset has finished. We delay 1000us 4126 * prior to reading the register to make sure the chip 4127 * has sufficiently completed its reset to handle register 4128 * accesses. 4129 */ 4130 wait = 1000; 4131 do { 4132 aic_delay(1000); 4133 } while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK)); 4134 4135 if (wait == 0) { 4136 printf("%s: WARNING - Failed chip reset! " 4137 "Trying to initialize anyway.\n", ahc_name(ahc)); 4138 } 4139 ahc_outb(ahc, HCNTRL, ahc->pause); 4140 4141 /* Determine channel configuration */ 4142 sblkctl = ahc_inb(ahc, SBLKCTL) & (SELBUSB|SELWIDE); 4143 /* No Twin Channel PCI cards */ 4144 if ((ahc->chip & AHC_PCI) != 0) 4145 sblkctl &= ~SELBUSB; 4146 switch (sblkctl) { 4147 case 0: 4148 /* Single Narrow Channel */ 4149 break; 4150 case 2: 4151 /* Wide Channel */ 4152 ahc->features |= AHC_WIDE; 4153 break; 4154 case 8: 4155 /* Twin Channel */ 4156 ahc->features |= AHC_TWIN; 4157 break; 4158 default: 4159 printf(" Unsupported adapter type. Ignoring\n"); 4160 return(-1); 4161 } 4162 4163 /* 4164 * Reload sxfrctl1. 4165 * 4166 * We must always initialize STPWEN to 1 before we 4167 * restore the saved values. STPWEN is initialized 4168 * to a tri-state condition which can only be cleared 4169 * by turning it on. 4170 */ 4171 if ((ahc->features & AHC_TWIN) != 0) { 4172 u_int sblkctl; 4173 4174 sblkctl = ahc_inb(ahc, SBLKCTL); 4175 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB); 4176 ahc_outb(ahc, SXFRCTL1, sxfrctl1_b); 4177 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB); 4178 } 4179 ahc_outb(ahc, SXFRCTL1, sxfrctl1_a); 4180 4181 error = 0; 4182 if (reinit != 0) 4183 /* 4184 * If a recovery action has forced a chip reset, 4185 * re-initialize the chip to our liking. 4186 */ 4187 error = ahc->bus_chip_init(ahc); 4188 #ifdef AHC_DUMP_SEQ 4189 else 4190 ahc_dumpseq(ahc); 4191 #endif 4192 4193 return (error); 4194 } 4195 4196 /* 4197 * Determine the number of SCBs available on the controller 4198 */ 4199 int 4200 ahc_probe_scbs(struct ahc_softc *ahc) { 4201 int i; 4202 4203 for (i = 0; i < AHC_SCB_MAX; i++) { 4204 ahc_outb(ahc, SCBPTR, i); 4205 ahc_outb(ahc, SCB_BASE, i); 4206 if (ahc_inb(ahc, SCB_BASE) != i) 4207 break; 4208 ahc_outb(ahc, SCBPTR, 0); 4209 if (ahc_inb(ahc, SCB_BASE) != 0) 4210 break; 4211 } 4212 return (i); 4213 } 4214 4215 static void 4216 ahc_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 4217 { 4218 bus_addr_t *baddr; 4219 4220 baddr = (bus_addr_t *)arg; 4221 *baddr = segs->ds_addr; 4222 } 4223 4224 static void 4225 ahc_build_free_scb_list(struct ahc_softc *ahc) 4226 { 4227 int scbsize; 4228 int i; 4229 4230 scbsize = 32; 4231 if ((ahc->flags & AHC_LSCBS_ENABLED) != 0) 4232 scbsize = 64; 4233 4234 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 4235 int j; 4236 4237 ahc_outb(ahc, SCBPTR, i); 4238 4239 /* 4240 * Touch all SCB bytes to avoid parity errors 4241 * should one of our debugging routines read 4242 * an otherwise uninitiatlized byte. 4243 */ 4244 for (j = 0; j < scbsize; j++) 4245 ahc_outb(ahc, SCB_BASE+j, 0xFF); 4246 4247 /* Clear the control byte. */ 4248 ahc_outb(ahc, SCB_CONTROL, 0); 4249 4250 /* Set the next pointer */ 4251 if ((ahc->flags & AHC_PAGESCBS) != 0) 4252 ahc_outb(ahc, SCB_NEXT, i+1); 4253 else 4254 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL); 4255 4256 /* Make the tag number, SCSIID, and lun invalid */ 4257 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL); 4258 ahc_outb(ahc, SCB_SCSIID, 0xFF); 4259 ahc_outb(ahc, SCB_LUN, 0xFF); 4260 } 4261 4262 if ((ahc->flags & AHC_PAGESCBS) != 0) { 4263 /* SCB 0 heads the free list. */ 4264 ahc_outb(ahc, FREE_SCBH, 0); 4265 } else { 4266 /* No free list. */ 4267 ahc_outb(ahc, FREE_SCBH, SCB_LIST_NULL); 4268 } 4269 4270 /* Make sure that the last SCB terminates the free list */ 4271 ahc_outb(ahc, SCBPTR, i-1); 4272 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL); 4273 } 4274 4275 static int 4276 ahc_init_scbdata(struct ahc_softc *ahc) 4277 { 4278 struct scb_data *scb_data; 4279 4280 scb_data = ahc->scb_data; 4281 SLIST_INIT(&scb_data->free_scbs); 4282 SLIST_INIT(&scb_data->sg_maps); 4283 4284 /* Allocate SCB resources */ 4285 scb_data->scbarray = 4286 (struct scb *)malloc(sizeof(struct scb) * AHC_SCB_MAX_ALLOC, 4287 M_DEVBUF, M_NOWAIT); 4288 if (scb_data->scbarray == NULL) 4289 return (ENOMEM); 4290 memset(scb_data->scbarray, 0, sizeof(struct scb) * AHC_SCB_MAX_ALLOC); 4291 4292 /* Determine the number of hardware SCBs and initialize them */ 4293 4294 scb_data->maxhscbs = ahc_probe_scbs(ahc); 4295 if (ahc->scb_data->maxhscbs == 0) { 4296 printf("%s: No SCB space found\n", ahc_name(ahc)); 4297 return (ENXIO); 4298 } 4299 4300 /* 4301 * Create our DMA tags. These tags define the kinds of device 4302 * accessible memory allocations and memory mappings we will 4303 * need to perform during normal operation. 4304 * 4305 * Unless we need to further restrict the allocation, we rely 4306 * on the restrictions of the parent dmat, hence the common 4307 * use of MAXADDR and MAXSIZE. 4308 */ 4309 4310 /* DMA tag for our hardware scb structures */ 4311 if (aic_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, 4312 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, 4313 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 4314 /*highaddr*/BUS_SPACE_MAXADDR, 4315 /*filter*/NULL, /*filterarg*/NULL, 4316 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb), 4317 /*nsegments*/1, 4318 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, 4319 /*flags*/0, &scb_data->hscb_dmat) != 0) { 4320 goto error_exit; 4321 } 4322 4323 scb_data->init_level++; 4324 4325 /* Allocation for our hscbs */ 4326 if (aic_dmamem_alloc(ahc, scb_data->hscb_dmat, 4327 (void **)&scb_data->hscbs, 4328 BUS_DMA_NOWAIT | BUS_DMA_COHERENT, 4329 &scb_data->hscb_dmamap) != 0) { 4330 goto error_exit; 4331 } 4332 4333 scb_data->init_level++; 4334 4335 /* And permanently map them */ 4336 aic_dmamap_load(ahc, scb_data->hscb_dmat, scb_data->hscb_dmamap, 4337 scb_data->hscbs, 4338 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb), 4339 ahc_dmamap_cb, &scb_data->hscb_busaddr, /*flags*/0); 4340 4341 scb_data->init_level++; 4342 4343 /* DMA tag for our sense buffers */ 4344 if (aic_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, 4345 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, 4346 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 4347 /*highaddr*/BUS_SPACE_MAXADDR, 4348 /*filter*/NULL, /*filterarg*/NULL, 4349 AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data), 4350 /*nsegments*/1, 4351 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, 4352 /*flags*/0, &scb_data->sense_dmat) != 0) { 4353 goto error_exit; 4354 } 4355 4356 scb_data->init_level++; 4357 4358 /* Allocate them */ 4359 if (aic_dmamem_alloc(ahc, scb_data->sense_dmat, 4360 (void **)&scb_data->sense, 4361 BUS_DMA_NOWAIT, &scb_data->sense_dmamap) != 0) { 4362 goto error_exit; 4363 } 4364 4365 scb_data->init_level++; 4366 4367 /* And permanently map them */ 4368 aic_dmamap_load(ahc, scb_data->sense_dmat, scb_data->sense_dmamap, 4369 scb_data->sense, 4370 AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data), 4371 ahc_dmamap_cb, &scb_data->sense_busaddr, /*flags*/0); 4372 4373 scb_data->init_level++; 4374 4375 /* DMA tag for our S/G structures. We allocate in page sized chunks */ 4376 if (aic_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/8, 4377 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, 4378 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 4379 /*highaddr*/BUS_SPACE_MAXADDR, 4380 /*filter*/NULL, /*filterarg*/NULL, 4381 PAGE_SIZE, /*nsegments*/1, 4382 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, 4383 /*flags*/0, &scb_data->sg_dmat) != 0) { 4384 goto error_exit; 4385 } 4386 4387 scb_data->init_level++; 4388 4389 /* Perform initial CCB allocation */ 4390 memset(scb_data->hscbs, 0, 4391 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb)); 4392 while (ahc_alloc_scbs(ahc) != 0) 4393 ; 4394 4395 if (scb_data->numscbs == 0) { 4396 printf("%s: ahc_init_scbdata - " 4397 "Unable to allocate initial scbs\n", 4398 ahc_name(ahc)); 4399 goto error_exit; 4400 } 4401 4402 /* 4403 * Reserve the next queued SCB. 4404 */ 4405 ahc->next_queued_scb = ahc_get_scb(ahc); 4406 4407 /* 4408 * Note that we were successful 4409 */ 4410 return (0); 4411 4412 error_exit: 4413 4414 return (ENOMEM); 4415 } 4416 4417 static void 4418 ahc_fini_scbdata(struct ahc_softc *ahc) 4419 { 4420 struct scb_data *scb_data; 4421 4422 scb_data = ahc->scb_data; 4423 if (scb_data == NULL) 4424 return; 4425 4426 switch (scb_data->init_level) { 4427 default: 4428 case 7: 4429 { 4430 struct sg_map_node *sg_map; 4431 4432 while ((sg_map = SLIST_FIRST(&scb_data->sg_maps))!= NULL) { 4433 SLIST_REMOVE_HEAD(&scb_data->sg_maps, links); 4434 aic_dmamap_unload(ahc, scb_data->sg_dmat, 4435 sg_map->sg_dmamap); 4436 aic_dmamem_free(ahc, scb_data->sg_dmat, 4437 sg_map->sg_vaddr, 4438 sg_map->sg_dmamap); 4439 free(sg_map, M_DEVBUF); 4440 } 4441 aic_dma_tag_destroy(ahc, scb_data->sg_dmat); 4442 } 4443 case 6: 4444 aic_dmamap_unload(ahc, scb_data->sense_dmat, 4445 scb_data->sense_dmamap); 4446 case 5: 4447 aic_dmamem_free(ahc, scb_data->sense_dmat, scb_data->sense, 4448 scb_data->sense_dmamap); 4449 case 4: 4450 aic_dma_tag_destroy(ahc, scb_data->sense_dmat); 4451 case 3: 4452 aic_dmamap_unload(ahc, scb_data->hscb_dmat, 4453 scb_data->hscb_dmamap); 4454 case 2: 4455 aic_dmamem_free(ahc, scb_data->hscb_dmat, scb_data->hscbs, 4456 scb_data->hscb_dmamap); 4457 case 1: 4458 aic_dma_tag_destroy(ahc, scb_data->hscb_dmat); 4459 break; 4460 case 0: 4461 break; 4462 } 4463 if (scb_data->scbarray != NULL) 4464 free(scb_data->scbarray, M_DEVBUF); 4465 } 4466 4467 int 4468 ahc_alloc_scbs(struct ahc_softc *ahc) 4469 { 4470 struct scb_data *scb_data; 4471 struct scb *next_scb; 4472 struct sg_map_node *sg_map; 4473 bus_addr_t physaddr; 4474 struct ahc_dma_seg *segs; 4475 int newcount; 4476 int i; 4477 4478 scb_data = ahc->scb_data; 4479 if (scb_data->numscbs >= AHC_SCB_MAX_ALLOC) 4480 /* Can't allocate any more */ 4481 return (0); 4482 4483 next_scb = &scb_data->scbarray[scb_data->numscbs]; 4484 4485 sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT); 4486 4487 if (sg_map == NULL) 4488 return (0); 4489 4490 /* Allocate S/G space for the next batch of SCBS */ 4491 if (aic_dmamem_alloc(ahc, scb_data->sg_dmat, 4492 (void **)&sg_map->sg_vaddr, 4493 BUS_DMA_NOWAIT | BUS_DMA_COHERENT, 4494 &sg_map->sg_dmamap) != 0) { 4495 free(sg_map, M_DEVBUF); 4496 return (0); 4497 } 4498 4499 SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links); 4500 4501 aic_dmamap_load(ahc, scb_data->sg_dmat, sg_map->sg_dmamap, 4502 sg_map->sg_vaddr, PAGE_SIZE, ahc_dmamap_cb, 4503 &sg_map->sg_physaddr, /*flags*/0); 4504 4505 segs = sg_map->sg_vaddr; 4506 physaddr = sg_map->sg_physaddr; 4507 4508 newcount = (PAGE_SIZE / (AHC_NSEG * sizeof(struct ahc_dma_seg))); 4509 newcount = MIN(newcount, (AHC_SCB_MAX_ALLOC - scb_data->numscbs)); 4510 for (i = 0; i < newcount; i++) { 4511 struct scb_platform_data *pdata; 4512 int error; 4513 pdata = (struct scb_platform_data *)malloc(sizeof(*pdata), 4514 M_DEVBUF, M_NOWAIT); 4515 if (pdata == NULL) 4516 break; 4517 next_scb->platform_data = pdata; 4518 next_scb->sg_map = sg_map; 4519 next_scb->sg_list = segs; 4520 /* 4521 * The sequencer always starts with the second entry. 4522 * The first entry is embedded in the scb. 4523 */ 4524 next_scb->sg_list_phys = physaddr + sizeof(struct ahc_dma_seg); 4525 next_scb->ahc_softc = ahc; 4526 next_scb->flags = SCB_FLAG_NONE; 4527 error = aic_dmamap_create(ahc, ahc->buffer_dmat, /*flags*/0, 4528 &next_scb->dmamap); 4529 if (error != 0) 4530 break; 4531 4532 next_scb->hscb = &scb_data->hscbs[scb_data->numscbs]; 4533 next_scb->hscb->tag = ahc->scb_data->numscbs; 4534 aic_timer_init(&next_scb->io_timer); 4535 SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, 4536 next_scb, links.sle); 4537 segs += AHC_NSEG; 4538 physaddr += (AHC_NSEG * sizeof(struct ahc_dma_seg)); 4539 next_scb++; 4540 ahc->scb_data->numscbs++; 4541 } 4542 return (i); 4543 } 4544 4545 void 4546 ahc_controller_info(struct ahc_softc *ahc, char *buf) 4547 { 4548 int len; 4549 4550 len = sprintf(buf, "%s: ", ahc_chip_names[ahc->chip & AHC_CHIPID_MASK]); 4551 buf += len; 4552 if ((ahc->features & AHC_TWIN) != 0) 4553 len = sprintf(buf, "Twin Channel, A SCSI Id=%d, " 4554 "B SCSI Id=%d, primary %c, ", 4555 ahc->our_id, ahc->our_id_b, 4556 (ahc->flags & AHC_PRIMARY_CHANNEL) + 'A'); 4557 else { 4558 const char *speed; 4559 const char *type; 4560 4561 speed = ""; 4562 if ((ahc->features & AHC_ULTRA) != 0) { 4563 speed = "Ultra "; 4564 } else if ((ahc->features & AHC_DT) != 0) { 4565 speed = "Ultra160 "; 4566 } else if ((ahc->features & AHC_ULTRA2) != 0) { 4567 speed = "Ultra2 "; 4568 } 4569 if ((ahc->features & AHC_WIDE) != 0) { 4570 type = "Wide"; 4571 } else { 4572 type = "Single"; 4573 } 4574 len = sprintf(buf, "%s%s Channel %c, SCSI Id=%d, ", 4575 speed, type, ahc->channel, ahc->our_id); 4576 } 4577 buf += len; 4578 4579 if ((ahc->flags & AHC_PAGESCBS) != 0) 4580 sprintf(buf, "%d/%d SCBs", 4581 ahc->scb_data->maxhscbs, AHC_MAX_QUEUE); 4582 else 4583 sprintf(buf, "%d SCBs", ahc->scb_data->maxhscbs); 4584 } 4585 4586 int 4587 ahc_chip_init(struct ahc_softc *ahc) 4588 { 4589 int term; 4590 int error; 4591 u_int i; 4592 u_int scsi_conf; 4593 u_int scsiseq_template; 4594 uint32_t physaddr; 4595 4596 ahc_outb(ahc, SEQ_FLAGS, 0); 4597 ahc_outb(ahc, SEQ_FLAGS2, 0); 4598 4599 /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/ 4600 if (ahc->features & AHC_TWIN) { 4601 /* 4602 * Setup Channel B first. 4603 */ 4604 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB); 4605 term = (ahc->flags & AHC_TERM_ENB_B) != 0 ? STPWEN : 0; 4606 ahc_outb(ahc, SCSIID, ahc->our_id_b); 4607 scsi_conf = ahc_inb(ahc, SCSICONF + 1); 4608 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) 4609 |term|ahc->seltime_b|ENSTIMER|ACTNEGEN); 4610 if ((ahc->features & AHC_ULTRA2) != 0) 4611 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR); 4612 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); 4613 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN); 4614 4615 /* Select Channel A */ 4616 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB); 4617 } 4618 term = (ahc->flags & AHC_TERM_ENB_A) != 0 ? STPWEN : 0; 4619 if ((ahc->features & AHC_ULTRA2) != 0) 4620 ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id); 4621 else 4622 ahc_outb(ahc, SCSIID, ahc->our_id); 4623 scsi_conf = ahc_inb(ahc, SCSICONF); 4624 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) 4625 |term|ahc->seltime 4626 |ENSTIMER|ACTNEGEN); 4627 if ((ahc->features & AHC_ULTRA2) != 0) 4628 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR); 4629 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); 4630 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN); 4631 4632 /* There are no untagged SCBs active yet. */ 4633 for (i = 0; i < 16; i++) { 4634 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, 0)); 4635 if ((ahc->flags & AHC_SCB_BTT) != 0) { 4636 int lun; 4637 4638 /* 4639 * The SCB based BTT allows an entry per 4640 * target and lun pair. 4641 */ 4642 for (lun = 1; lun < AHC_NUM_LUNS; lun++) 4643 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, lun)); 4644 } 4645 } 4646 4647 /* All of our queues are empty */ 4648 for (i = 0; i < 256; i++) 4649 ahc->qoutfifo[i] = SCB_LIST_NULL; 4650 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_PREREAD); 4651 4652 for (i = 0; i < 256; i++) 4653 ahc->qinfifo[i] = SCB_LIST_NULL; 4654 4655 if ((ahc->features & AHC_MULTI_TID) != 0) { 4656 ahc_outb(ahc, TARGID, 0); 4657 ahc_outb(ahc, TARGID + 1, 0); 4658 } 4659 4660 /* 4661 * Tell the sequencer where it can find our arrays in memory. 4662 */ 4663 physaddr = ahc->scb_data->hscb_busaddr; 4664 ahc_outb(ahc, HSCB_ADDR, physaddr & 0xFF); 4665 ahc_outb(ahc, HSCB_ADDR + 1, (physaddr >> 8) & 0xFF); 4666 ahc_outb(ahc, HSCB_ADDR + 2, (physaddr >> 16) & 0xFF); 4667 ahc_outb(ahc, HSCB_ADDR + 3, (physaddr >> 24) & 0xFF); 4668 4669 physaddr = ahc->shared_data_busaddr; 4670 ahc_outb(ahc, SHARED_DATA_ADDR, physaddr & 0xFF); 4671 ahc_outb(ahc, SHARED_DATA_ADDR + 1, (physaddr >> 8) & 0xFF); 4672 ahc_outb(ahc, SHARED_DATA_ADDR + 2, (physaddr >> 16) & 0xFF); 4673 ahc_outb(ahc, SHARED_DATA_ADDR + 3, (physaddr >> 24) & 0xFF); 4674 4675 /* 4676 * Initialize the group code to command length table. 4677 * This overrides the values in TARG_SCSIRATE, so only 4678 * setup the table after we have processed that information. 4679 */ 4680 ahc_outb(ahc, CMDSIZE_TABLE, 5); 4681 ahc_outb(ahc, CMDSIZE_TABLE + 1, 9); 4682 ahc_outb(ahc, CMDSIZE_TABLE + 2, 9); 4683 ahc_outb(ahc, CMDSIZE_TABLE + 3, 0); 4684 ahc_outb(ahc, CMDSIZE_TABLE + 4, 15); 4685 ahc_outb(ahc, CMDSIZE_TABLE + 5, 11); 4686 ahc_outb(ahc, CMDSIZE_TABLE + 6, 0); 4687 ahc_outb(ahc, CMDSIZE_TABLE + 7, 0); 4688 4689 if ((ahc->features & AHC_HS_MAILBOX) != 0) 4690 ahc_outb(ahc, HS_MAILBOX, 0); 4691 4692 /* Tell the sequencer of our initial queue positions */ 4693 if ((ahc->features & AHC_TARGETMODE) != 0) { 4694 ahc->tqinfifonext = 1; 4695 ahc_outb(ahc, KERNEL_TQINPOS, ahc->tqinfifonext - 1); 4696 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext); 4697 } 4698 ahc->qinfifonext = 0; 4699 ahc->qoutfifonext = 0; 4700 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 4701 ahc_outb(ahc, QOFF_CTLSTA, SCB_QSIZE_256); 4702 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); 4703 ahc_outb(ahc, SNSCB_QOFF, ahc->qinfifonext); 4704 ahc_outb(ahc, SDSCB_QOFF, 0); 4705 } else { 4706 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); 4707 ahc_outb(ahc, QINPOS, ahc->qinfifonext); 4708 ahc_outb(ahc, QOUTPOS, ahc->qoutfifonext); 4709 } 4710 4711 /* We don't have any waiting selections */ 4712 ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL); 4713 4714 /* Our disconnection list is empty too */ 4715 ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL); 4716 4717 /* Message out buffer starts empty */ 4718 ahc_outb(ahc, MSG_OUT, MSG_NOOP); 4719 4720 /* 4721 * Setup the allowed SCSI Sequences based on operational mode. 4722 * If we are a target, we'll enalbe select in operations once 4723 * we've had a lun enabled. 4724 */ 4725 scsiseq_template = ENSELO|ENAUTOATNO|ENAUTOATNP; 4726 if ((ahc->flags & AHC_INITIATORROLE) != 0) 4727 scsiseq_template |= ENRSELI; 4728 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq_template); 4729 4730 /* Initialize our list of free SCBs. */ 4731 ahc_build_free_scb_list(ahc); 4732 4733 /* 4734 * Tell the sequencer which SCB will be the next one it receives. 4735 */ 4736 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag); 4737 4738 /* 4739 * Load the Sequencer program and Enable the adapter 4740 * in "fast" mode. 4741 */ 4742 if (bootverbose) 4743 printf("%s: Downloading Sequencer Program...", 4744 ahc_name(ahc)); 4745 4746 error = ahc_loadseq(ahc); 4747 if (error != 0) 4748 return (error); 4749 4750 if ((ahc->features & AHC_ULTRA2) != 0) { 4751 int wait; 4752 4753 /* 4754 * Wait for up to 500ms for our transceivers 4755 * to settle. If the adapter does not have 4756 * a cable attached, the transceivers may 4757 * never settle, so don't complain if we 4758 * fail here. 4759 */ 4760 for (wait = 5000; 4761 (ahc_inb(ahc, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait; 4762 wait--) 4763 aic_delay(100); 4764 } 4765 ahc_restart(ahc); 4766 return (0); 4767 } 4768 4769 /* 4770 * Start the board, ready for normal operation 4771 */ 4772 int 4773 ahc_init(struct ahc_softc *ahc) 4774 { 4775 int max_targ; 4776 int error; 4777 u_int i; 4778 u_int scsi_conf; 4779 u_int ultraenb; 4780 u_int discenable; 4781 u_int tagenable; 4782 size_t driver_data_size; 4783 4784 #ifdef AHC_DEBUG 4785 if ((ahc_debug & AHC_DEBUG_SEQUENCER) != 0) 4786 ahc->flags |= AHC_SEQUENCER_DEBUG; 4787 #endif 4788 4789 #ifdef AHC_PRINT_SRAM 4790 printf("Scratch Ram:"); 4791 for (i = 0x20; i < 0x5f; i++) { 4792 if (((i % 8) == 0) && (i != 0)) { 4793 printf ("\n "); 4794 } 4795 printf (" 0x%x", ahc_inb(ahc, i)); 4796 } 4797 if ((ahc->features & AHC_MORE_SRAM) != 0) { 4798 for (i = 0x70; i < 0x7f; i++) { 4799 if (((i % 8) == 0) && (i != 0)) { 4800 printf ("\n "); 4801 } 4802 printf (" 0x%x", ahc_inb(ahc, i)); 4803 } 4804 } 4805 printf ("\n"); 4806 /* 4807 * Reading uninitialized scratch ram may 4808 * generate parity errors. 4809 */ 4810 ahc_outb(ahc, CLRINT, CLRPARERR); 4811 ahc_outb(ahc, CLRINT, CLRBRKADRINT); 4812 #endif 4813 max_targ = 15; 4814 4815 /* 4816 * Assume we have a board at this stage and it has been reset. 4817 */ 4818 if ((ahc->flags & AHC_USEDEFAULTS) != 0) 4819 ahc->our_id = ahc->our_id_b = 7; 4820 4821 /* 4822 * Default to allowing initiator operations. 4823 */ 4824 ahc->flags |= AHC_INITIATORROLE; 4825 4826 /* 4827 * Only allow target mode features if this unit has them enabled. 4828 */ 4829 if ((AHC_TMODE_ENABLE & (0x1 << ahc->unit)) == 0) 4830 ahc->features &= ~AHC_TARGETMODE; 4831 4832 /* DMA tag for mapping buffers into device visible space. */ 4833 if (aic_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, 4834 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, 4835 /*lowaddr*/ahc->flags & AHC_39BIT_ADDRESSING 4836 ? (bus_addr_t)0x7FFFFFFFFFULL 4837 : BUS_SPACE_MAXADDR_32BIT, 4838 /*highaddr*/BUS_SPACE_MAXADDR, 4839 /*filter*/NULL, /*filterarg*/NULL, 4840 /*maxsize*/(AHC_NSEG - 1) * PAGE_SIZE, 4841 /*nsegments*/AHC_NSEG, 4842 /*maxsegsz*/AHC_MAXTRANSFER_SIZE, 4843 /*flags*/BUS_DMA_ALLOCNOW, 4844 &ahc->buffer_dmat) != 0) { 4845 return (ENOMEM); 4846 } 4847 4848 ahc->init_level++; 4849 4850 /* 4851 * DMA tag for our command fifos and other data in system memory 4852 * the card's sequencer must be able to access. For initiator 4853 * roles, we need to allocate space for the qinfifo and qoutfifo. 4854 * The qinfifo and qoutfifo are composed of 256 1 byte elements. 4855 * When providing for the target mode role, we must additionally 4856 * provide space for the incoming target command fifo and an extra 4857 * byte to deal with a dma bug in some chip versions. 4858 */ 4859 driver_data_size = 2 * 256 * sizeof(uint8_t); 4860 if ((ahc->features & AHC_TARGETMODE) != 0) 4861 driver_data_size += AHC_TMODE_CMDS * sizeof(struct target_cmd) 4862 + /*DMA WideOdd Bug Buffer*/1; 4863 if (aic_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, 4864 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, 4865 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 4866 /*highaddr*/BUS_SPACE_MAXADDR, 4867 /*filter*/NULL, /*filterarg*/NULL, 4868 driver_data_size, 4869 /*nsegments*/1, 4870 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, 4871 /*flags*/0, &ahc->shared_data_dmat) != 0) { 4872 return (ENOMEM); 4873 } 4874 4875 ahc->init_level++; 4876 4877 /* Allocation of driver data */ 4878 if (aic_dmamem_alloc(ahc, ahc->shared_data_dmat, 4879 (void **)&ahc->qoutfifo, 4880 BUS_DMA_NOWAIT | BUS_DMA_COHERENT, 4881 &ahc->shared_data_dmamap) != 0) { 4882 return (ENOMEM); 4883 } 4884 4885 ahc->init_level++; 4886 4887 /* And permanently map it in */ 4888 aic_dmamap_load(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap, 4889 ahc->qoutfifo, driver_data_size, ahc_dmamap_cb, 4890 &ahc->shared_data_busaddr, /*flags*/0); 4891 4892 if ((ahc->features & AHC_TARGETMODE) != 0) { 4893 ahc->targetcmds = (struct target_cmd *)ahc->qoutfifo; 4894 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[AHC_TMODE_CMDS]; 4895 ahc->dma_bug_buf = ahc->shared_data_busaddr 4896 + driver_data_size - 1; 4897 /* All target command blocks start out invalid. */ 4898 for (i = 0; i < AHC_TMODE_CMDS; i++) 4899 ahc->targetcmds[i].cmd_valid = 0; 4900 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_PREREAD); 4901 } 4902 ahc->qinfifo = &ahc->qoutfifo[256]; 4903 4904 ahc->init_level++; 4905 4906 /* Allocate SCB data now that buffer_dmat is initialized */ 4907 if (ahc->scb_data->maxhscbs == 0) 4908 if (ahc_init_scbdata(ahc) != 0) 4909 return (ENOMEM); 4910 4911 /* 4912 * Allocate a tstate to house information for our 4913 * initiator presence on the bus as well as the user 4914 * data for any target mode initiator. 4915 */ 4916 if (ahc_alloc_tstate(ahc, ahc->our_id, 'A') == NULL) { 4917 printf("%s: unable to allocate ahc_tmode_tstate. " 4918 "Failing attach\n", ahc_name(ahc)); 4919 return (ENOMEM); 4920 } 4921 4922 if ((ahc->features & AHC_TWIN) != 0) { 4923 if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) { 4924 printf("%s: unable to allocate ahc_tmode_tstate. " 4925 "Failing attach\n", ahc_name(ahc)); 4926 return (ENOMEM); 4927 } 4928 } 4929 4930 /* 4931 * Fire up a recovery thread for this controller. 4932 */ 4933 error = ahc_spawn_recovery_thread(ahc); 4934 if (error != 0) 4935 return (error); 4936 4937 if (ahc->scb_data->maxhscbs < AHC_SCB_MAX_ALLOC) { 4938 ahc->flags |= AHC_PAGESCBS; 4939 } else { 4940 ahc->flags &= ~AHC_PAGESCBS; 4941 } 4942 4943 #ifdef AHC_DEBUG 4944 if (ahc_debug & AHC_SHOW_MISC) { 4945 printf("%s: hardware scb %u bytes; kernel scb %u bytes; " 4946 "ahc_dma %u bytes\n", 4947 ahc_name(ahc), 4948 (u_int)sizeof(struct hardware_scb), 4949 (u_int)sizeof(struct scb), 4950 (u_int)sizeof(struct ahc_dma_seg)); 4951 } 4952 #endif /* AHC_DEBUG */ 4953 4954 /* 4955 * Look at the information that board initialization or 4956 * the board bios has left us. 4957 */ 4958 if (ahc->features & AHC_TWIN) { 4959 scsi_conf = ahc_inb(ahc, SCSICONF + 1); 4960 if ((scsi_conf & RESET_SCSI) != 0 4961 && (ahc->flags & AHC_INITIATORROLE) != 0) 4962 ahc->flags |= AHC_RESET_BUS_B; 4963 } 4964 4965 scsi_conf = ahc_inb(ahc, SCSICONF); 4966 if ((scsi_conf & RESET_SCSI) != 0 4967 && (ahc->flags & AHC_INITIATORROLE) != 0) 4968 ahc->flags |= AHC_RESET_BUS_A; 4969 4970 ultraenb = 0; 4971 tagenable = ALL_TARGETS_MASK; 4972 4973 /* Grab the disconnection disable table and invert it for our needs */ 4974 if ((ahc->flags & AHC_USEDEFAULTS) != 0) { 4975 printf("%s: Host Adapter Bios disabled. Using default SCSI " 4976 "device parameters\n", ahc_name(ahc)); 4977 ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B| 4978 AHC_TERM_ENB_A|AHC_TERM_ENB_B; 4979 discenable = ALL_TARGETS_MASK; 4980 if ((ahc->features & AHC_ULTRA) != 0) 4981 ultraenb = ALL_TARGETS_MASK; 4982 } else { 4983 discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8) 4984 | ahc_inb(ahc, DISC_DSB)); 4985 if ((ahc->features & (AHC_ULTRA|AHC_ULTRA2)) != 0) 4986 ultraenb = (ahc_inb(ahc, ULTRA_ENB + 1) << 8) 4987 | ahc_inb(ahc, ULTRA_ENB); 4988 } 4989 4990 if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0) 4991 max_targ = 7; 4992 4993 for (i = 0; i <= max_targ; i++) { 4994 struct ahc_initiator_tinfo *tinfo; 4995 struct ahc_tmode_tstate *tstate; 4996 u_int our_id; 4997 u_int target_id; 4998 char channel; 4999 5000 channel = 'A'; 5001 our_id = ahc->our_id; 5002 target_id = i; 5003 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 5004 channel = 'B'; 5005 our_id = ahc->our_id_b; 5006 target_id = i % 8; 5007 } 5008 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 5009 target_id, &tstate); 5010 /* Default to async narrow across the board */ 5011 memset(tinfo, 0, sizeof(*tinfo)); 5012 if (ahc->flags & AHC_USEDEFAULTS) { 5013 if ((ahc->features & AHC_WIDE) != 0) 5014 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; 5015 5016 /* 5017 * These will be truncated when we determine the 5018 * connection type we have with the target. 5019 */ 5020 tinfo->user.period = ahc_syncrates->period; 5021 tinfo->user.offset = MAX_OFFSET; 5022 } else { 5023 u_int scsirate; 5024 uint16_t mask; 5025 5026 /* Take the settings leftover in scratch RAM. */ 5027 scsirate = ahc_inb(ahc, TARG_SCSIRATE + i); 5028 mask = (0x01 << i); 5029 if ((ahc->features & AHC_ULTRA2) != 0) { 5030 u_int offset; 5031 u_int maxsync; 5032 5033 if ((scsirate & SOFS) == 0x0F) { 5034 /* 5035 * Haven't negotiated yet, 5036 * so the format is different. 5037 */ 5038 scsirate = (scsirate & SXFR) >> 4 5039 | (ultraenb & mask) 5040 ? 0x08 : 0x0 5041 | (scsirate & WIDEXFER); 5042 offset = MAX_OFFSET_ULTRA2; 5043 } else 5044 offset = ahc_inb(ahc, TARG_OFFSET + i); 5045 if ((scsirate & ~WIDEXFER) == 0 && offset != 0) 5046 /* Set to the lowest sync rate, 5MHz */ 5047 scsirate |= 0x1c; 5048 maxsync = AHC_SYNCRATE_ULTRA2; 5049 if ((ahc->features & AHC_DT) != 0) 5050 maxsync = AHC_SYNCRATE_DT; 5051 tinfo->user.period = 5052 ahc_find_period(ahc, scsirate, maxsync); 5053 if (offset == 0) 5054 tinfo->user.period = 0; 5055 else 5056 tinfo->user.offset = MAX_OFFSET; 5057 if ((scsirate & SXFR_ULTRA2) <= 8/*10MHz*/ 5058 && (ahc->features & AHC_DT) != 0) 5059 tinfo->user.ppr_options = 5060 MSG_EXT_PPR_DT_REQ; 5061 } else if ((scsirate & SOFS) != 0) { 5062 if ((scsirate & SXFR) == 0x40 5063 && (ultraenb & mask) != 0) { 5064 /* Treat 10MHz as a non-ultra speed */ 5065 scsirate &= ~SXFR; 5066 ultraenb &= ~mask; 5067 } 5068 tinfo->user.period = 5069 ahc_find_period(ahc, scsirate, 5070 (ultraenb & mask) 5071 ? AHC_SYNCRATE_ULTRA 5072 : AHC_SYNCRATE_FAST); 5073 if (tinfo->user.period != 0) 5074 tinfo->user.offset = MAX_OFFSET; 5075 } 5076 if (tinfo->user.period == 0) 5077 tinfo->user.offset = 0; 5078 if ((scsirate & WIDEXFER) != 0 5079 && (ahc->features & AHC_WIDE) != 0) 5080 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; 5081 tinfo->user.protocol_version = 4; 5082 if ((ahc->features & AHC_DT) != 0) 5083 tinfo->user.transport_version = 3; 5084 else 5085 tinfo->user.transport_version = 2; 5086 tinfo->goal.protocol_version = 2; 5087 tinfo->goal.transport_version = 2; 5088 tinfo->curr.protocol_version = 2; 5089 tinfo->curr.transport_version = 2; 5090 } 5091 tstate->ultraenb = 0; 5092 } 5093 ahc->user_discenable = discenable; 5094 ahc->user_tagenable = tagenable; 5095 5096 return (ahc->bus_chip_init(ahc)); 5097 } 5098 5099 void 5100 ahc_intr_enable(struct ahc_softc *ahc, int enable) 5101 { 5102 u_int hcntrl; 5103 5104 hcntrl = ahc_inb(ahc, HCNTRL); 5105 hcntrl &= ~INTEN; 5106 ahc->pause &= ~INTEN; 5107 ahc->unpause &= ~INTEN; 5108 if (enable) { 5109 hcntrl |= INTEN; 5110 ahc->pause |= INTEN; 5111 ahc->unpause |= INTEN; 5112 } 5113 ahc_outb(ahc, HCNTRL, hcntrl); 5114 } 5115 5116 /* 5117 * Ensure that the card is paused in a location 5118 * outside of all critical sections and that all 5119 * pending work is completed prior to returning. 5120 * This routine should only be called from outside 5121 * an interrupt context. 5122 */ 5123 void 5124 ahc_pause_and_flushwork(struct ahc_softc *ahc) 5125 { 5126 int intstat; 5127 int maxloops; 5128 int paused; 5129 5130 maxloops = 1000; 5131 ahc->flags |= AHC_ALL_INTERRUPTS; 5132 paused = FALSE; 5133 do { 5134 if (paused) { 5135 ahc_unpause(ahc); 5136 /* 5137 * Give the sequencer some time to service 5138 * any active selections. 5139 */ 5140 aic_delay(500); 5141 } 5142 ahc_intr(ahc); 5143 ahc_pause(ahc); 5144 paused = TRUE; 5145 ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & ~ENSELO); 5146 intstat = ahc_inb(ahc, INTSTAT); 5147 if ((intstat & INT_PEND) == 0) { 5148 ahc_clear_critical_section(ahc); 5149 intstat = ahc_inb(ahc, INTSTAT); 5150 } 5151 } while (--maxloops 5152 && (intstat != 0xFF || (ahc->features & AHC_REMOVABLE) == 0) 5153 && ((intstat & INT_PEND) != 0 5154 || (ahc_inb(ahc, SSTAT0) & (SELDO|SELINGO)) != 0)); 5155 if (maxloops == 0) { 5156 printf("Infinite interrupt loop, INTSTAT = %x", 5157 ahc_inb(ahc, INTSTAT)); 5158 } 5159 ahc_platform_flushwork(ahc); 5160 ahc->flags &= ~AHC_ALL_INTERRUPTS; 5161 } 5162 5163 int 5164 ahc_suspend(struct ahc_softc *ahc) 5165 { 5166 5167 ahc_pause_and_flushwork(ahc); 5168 5169 if (LIST_FIRST(&ahc->pending_scbs) != NULL) { 5170 ahc_unpause(ahc); 5171 return (EBUSY); 5172 } 5173 5174 #ifdef AHC_TARGET_MODE 5175 /* 5176 * XXX What about ATIOs that have not yet been serviced? 5177 * Perhaps we should just refuse to be suspended if we 5178 * are acting in a target role. 5179 */ 5180 if (ahc->pending_device != NULL) { 5181 ahc_unpause(ahc); 5182 return (EBUSY); 5183 } 5184 #endif 5185 ahc_shutdown(ahc); 5186 return (0); 5187 } 5188 5189 int 5190 ahc_resume(struct ahc_softc *ahc) 5191 { 5192 5193 ahc_reset(ahc, /*reinit*/TRUE); 5194 ahc_intr_enable(ahc, TRUE); 5195 ahc_restart(ahc); 5196 return (0); 5197 } 5198 5199 /************************** Busy Target Table *********************************/ 5200 /* 5201 * Return the untagged transaction id for a given target/channel lun. 5202 * Optionally, clear the entry. 5203 */ 5204 u_int 5205 ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl) 5206 { 5207 u_int scbid; 5208 u_int target_offset; 5209 5210 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5211 u_int saved_scbptr; 5212 5213 saved_scbptr = ahc_inb(ahc, SCBPTR); 5214 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); 5215 scbid = ahc_inb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl)); 5216 ahc_outb(ahc, SCBPTR, saved_scbptr); 5217 } else { 5218 target_offset = TCL_TARGET_OFFSET(tcl); 5219 scbid = ahc_inb(ahc, BUSY_TARGETS + target_offset); 5220 } 5221 5222 return (scbid); 5223 } 5224 5225 void 5226 ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl) 5227 { 5228 u_int target_offset; 5229 5230 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5231 u_int saved_scbptr; 5232 5233 saved_scbptr = ahc_inb(ahc, SCBPTR); 5234 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); 5235 ahc_outb(ahc, SCB_64_BTT+TCL_TARGET_OFFSET(tcl), SCB_LIST_NULL); 5236 ahc_outb(ahc, SCBPTR, saved_scbptr); 5237 } else { 5238 target_offset = TCL_TARGET_OFFSET(tcl); 5239 ahc_outb(ahc, BUSY_TARGETS + target_offset, SCB_LIST_NULL); 5240 } 5241 } 5242 5243 void 5244 ahc_busy_tcl(struct ahc_softc *ahc, u_int tcl, u_int scbid) 5245 { 5246 u_int target_offset; 5247 5248 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5249 u_int saved_scbptr; 5250 5251 saved_scbptr = ahc_inb(ahc, SCBPTR); 5252 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); 5253 ahc_outb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl), scbid); 5254 ahc_outb(ahc, SCBPTR, saved_scbptr); 5255 } else { 5256 target_offset = TCL_TARGET_OFFSET(tcl); 5257 ahc_outb(ahc, BUSY_TARGETS + target_offset, scbid); 5258 } 5259 } 5260 5261 /************************** SCB and SCB queue management **********************/ 5262 int 5263 ahc_match_scb(struct ahc_softc *ahc, struct scb *scb, int target, 5264 char channel, int lun, u_int tag, role_t role) 5265 { 5266 int targ = SCB_GET_TARGET(ahc, scb); 5267 char chan = SCB_GET_CHANNEL(ahc, scb); 5268 int slun = SCB_GET_LUN(scb); 5269 int match; 5270 5271 match = ((chan == channel) || (channel == ALL_CHANNELS)); 5272 if (match != 0) 5273 match = ((targ == target) || (target == CAM_TARGET_WILDCARD)); 5274 if (match != 0) 5275 match = ((lun == slun) || (lun == CAM_LUN_WILDCARD)); 5276 if (match != 0) { 5277 #ifdef AHC_TARGET_MODE 5278 int group; 5279 5280 group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code); 5281 if (role == ROLE_INITIATOR) { 5282 match = (group != XPT_FC_GROUP_TMODE) 5283 && ((tag == scb->hscb->tag) 5284 || (tag == SCB_LIST_NULL)); 5285 } else if (role == ROLE_TARGET) { 5286 match = (group == XPT_FC_GROUP_TMODE) 5287 && ((tag == scb->io_ctx->csio.tag_id) 5288 || (tag == SCB_LIST_NULL)); 5289 } 5290 #else /* !AHC_TARGET_MODE */ 5291 match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL)); 5292 #endif /* AHC_TARGET_MODE */ 5293 } 5294 5295 return match; 5296 } 5297 5298 void 5299 ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 5300 { 5301 int target; 5302 char channel; 5303 int lun; 5304 5305 target = SCB_GET_TARGET(ahc, scb); 5306 lun = SCB_GET_LUN(scb); 5307 channel = SCB_GET_CHANNEL(ahc, scb); 5308 5309 ahc_search_qinfifo(ahc, target, channel, lun, 5310 /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN, 5311 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 5312 5313 ahc_platform_freeze_devq(ahc, scb); 5314 } 5315 5316 void 5317 ahc_qinfifo_requeue_tail(struct ahc_softc *ahc, struct scb *scb) 5318 { 5319 struct scb *prev_scb; 5320 5321 prev_scb = NULL; 5322 if (ahc_qinfifo_count(ahc) != 0) { 5323 u_int prev_tag; 5324 uint8_t prev_pos; 5325 5326 prev_pos = ahc->qinfifonext - 1; 5327 prev_tag = ahc->qinfifo[prev_pos]; 5328 prev_scb = ahc_lookup_scb(ahc, prev_tag); 5329 } 5330 ahc_qinfifo_requeue(ahc, prev_scb, scb); 5331 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 5332 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); 5333 } else { 5334 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); 5335 } 5336 } 5337 5338 static void 5339 ahc_qinfifo_requeue(struct ahc_softc *ahc, struct scb *prev_scb, 5340 struct scb *scb) 5341 { 5342 if (prev_scb == NULL) { 5343 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag); 5344 } else { 5345 prev_scb->hscb->next = scb->hscb->tag; 5346 ahc_sync_scb(ahc, prev_scb, 5347 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 5348 } 5349 ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag; 5350 scb->hscb->next = ahc->next_queued_scb->hscb->tag; 5351 ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 5352 } 5353 5354 static int 5355 ahc_qinfifo_count(struct ahc_softc *ahc) 5356 { 5357 uint8_t qinpos; 5358 uint8_t diff; 5359 5360 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 5361 qinpos = ahc_inb(ahc, SNSCB_QOFF); 5362 ahc_outb(ahc, SNSCB_QOFF, qinpos); 5363 } else 5364 qinpos = ahc_inb(ahc, QINPOS); 5365 diff = ahc->qinfifonext - qinpos; 5366 return (diff); 5367 } 5368 5369 int 5370 ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel, 5371 int lun, u_int tag, role_t role, uint32_t status, 5372 ahc_search_action action) 5373 { 5374 struct scb *scb; 5375 struct scb *prev_scb; 5376 uint8_t qinstart; 5377 uint8_t qinpos; 5378 uint8_t qintail; 5379 uint8_t next; 5380 uint8_t prev; 5381 uint8_t curscbptr; 5382 int found; 5383 int have_qregs; 5384 5385 qintail = ahc->qinfifonext; 5386 have_qregs = (ahc->features & AHC_QUEUE_REGS) != 0; 5387 if (have_qregs) { 5388 qinstart = ahc_inb(ahc, SNSCB_QOFF); 5389 ahc_outb(ahc, SNSCB_QOFF, qinstart); 5390 } else 5391 qinstart = ahc_inb(ahc, QINPOS); 5392 qinpos = qinstart; 5393 found = 0; 5394 prev_scb = NULL; 5395 5396 if (action == SEARCH_COMPLETE) { 5397 /* 5398 * Don't attempt to run any queued untagged transactions 5399 * until we are done with the abort process. 5400 */ 5401 ahc_freeze_untagged_queues(ahc); 5402 } 5403 5404 /* 5405 * Start with an empty queue. Entries that are not chosen 5406 * for removal will be re-added to the queue as we go. 5407 */ 5408 ahc->qinfifonext = qinpos; 5409 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag); 5410 5411 while (qinpos != qintail) { 5412 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinpos]); 5413 if (scb == NULL) { 5414 printf("qinpos = %d, SCB index = %d\n", 5415 qinpos, ahc->qinfifo[qinpos]); 5416 panic("Loop 1\n"); 5417 } 5418 5419 if (ahc_match_scb(ahc, scb, target, channel, lun, tag, role)) { 5420 /* 5421 * We found an scb that needs to be acted on. 5422 */ 5423 found++; 5424 switch (action) { 5425 case SEARCH_COMPLETE: 5426 { 5427 cam_status ostat; 5428 cam_status cstat; 5429 5430 ostat = aic_get_transaction_status(scb); 5431 if (ostat == CAM_REQ_INPROG) 5432 aic_set_transaction_status(scb, status); 5433 cstat = aic_get_transaction_status(scb); 5434 if (cstat != CAM_REQ_CMP) 5435 aic_freeze_scb(scb); 5436 if ((scb->flags & SCB_ACTIVE) == 0) 5437 printf("Inactive SCB in qinfifo\n"); 5438 ahc_done(ahc, scb); 5439 5440 /* FALLTHROUGH */ 5441 } 5442 case SEARCH_REMOVE: 5443 break; 5444 case SEARCH_COUNT: 5445 ahc_qinfifo_requeue(ahc, prev_scb, scb); 5446 prev_scb = scb; 5447 break; 5448 } 5449 } else { 5450 ahc_qinfifo_requeue(ahc, prev_scb, scb); 5451 prev_scb = scb; 5452 } 5453 qinpos++; 5454 } 5455 5456 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 5457 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); 5458 } else { 5459 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); 5460 } 5461 5462 if (action != SEARCH_COUNT 5463 && (found != 0) 5464 && (qinstart != ahc->qinfifonext)) { 5465 /* 5466 * The sequencer may be in the process of dmaing 5467 * down the SCB at the beginning of the queue. 5468 * This could be problematic if either the first, 5469 * or the second SCB is removed from the queue 5470 * (the first SCB includes a pointer to the "next" 5471 * SCB to dma). If we have removed any entries, swap 5472 * the first element in the queue with the next HSCB 5473 * so the sequencer will notice that NEXT_QUEUED_SCB 5474 * has changed during its dma attempt and will retry 5475 * the DMA. 5476 */ 5477 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinstart]); 5478 5479 if (scb == NULL) { 5480 printf("found = %d, qinstart = %d, qinfifionext = %d\n", 5481 found, qinstart, ahc->qinfifonext); 5482 panic("First/Second Qinfifo fixup\n"); 5483 } 5484 /* 5485 * ahc_swap_with_next_hscb forces our next pointer to 5486 * point to the reserved SCB for future commands. Save 5487 * and restore our original next pointer to maintain 5488 * queue integrity. 5489 */ 5490 next = scb->hscb->next; 5491 ahc->scb_data->scbindex[scb->hscb->tag] = NULL; 5492 ahc_swap_with_next_hscb(ahc, scb); 5493 scb->hscb->next = next; 5494 ahc->qinfifo[qinstart] = scb->hscb->tag; 5495 5496 /* Tell the card about the new head of the qinfifo. */ 5497 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag); 5498 5499 /* Fixup the tail "next" pointer. */ 5500 qintail = ahc->qinfifonext - 1; 5501 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qintail]); 5502 scb->hscb->next = ahc->next_queued_scb->hscb->tag; 5503 } 5504 5505 /* 5506 * Search waiting for selection list. 5507 */ 5508 curscbptr = ahc_inb(ahc, SCBPTR); 5509 next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */ 5510 prev = SCB_LIST_NULL; 5511 5512 while (next != SCB_LIST_NULL) { 5513 uint8_t scb_index; 5514 5515 ahc_outb(ahc, SCBPTR, next); 5516 scb_index = ahc_inb(ahc, SCB_TAG); 5517 if (scb_index >= ahc->scb_data->numscbs) { 5518 printf("Waiting List inconsistency. " 5519 "SCB index == %d, yet numscbs == %d.", 5520 scb_index, ahc->scb_data->numscbs); 5521 ahc_dump_card_state(ahc); 5522 panic("for safety"); 5523 } 5524 scb = ahc_lookup_scb(ahc, scb_index); 5525 if (scb == NULL) { 5526 printf("scb_index = %d, next = %d\n", 5527 scb_index, next); 5528 panic("Waiting List traversal\n"); 5529 } 5530 if (ahc_match_scb(ahc, scb, target, channel, 5531 lun, SCB_LIST_NULL, role)) { 5532 /* 5533 * We found an scb that needs to be acted on. 5534 */ 5535 found++; 5536 switch (action) { 5537 case SEARCH_COMPLETE: 5538 { 5539 cam_status ostat; 5540 cam_status cstat; 5541 5542 ostat = aic_get_transaction_status(scb); 5543 if (ostat == CAM_REQ_INPROG) 5544 aic_set_transaction_status(scb, 5545 status); 5546 cstat = aic_get_transaction_status(scb); 5547 if (cstat != CAM_REQ_CMP) 5548 aic_freeze_scb(scb); 5549 if ((scb->flags & SCB_ACTIVE) == 0) 5550 printf("Inactive SCB in Wait List\n"); 5551 ahc_done(ahc, scb); 5552 /* FALLTHROUGH */ 5553 } 5554 case SEARCH_REMOVE: 5555 next = ahc_rem_wscb(ahc, next, prev); 5556 break; 5557 case SEARCH_COUNT: 5558 prev = next; 5559 next = ahc_inb(ahc, SCB_NEXT); 5560 break; 5561 } 5562 } else { 5563 5564 prev = next; 5565 next = ahc_inb(ahc, SCB_NEXT); 5566 } 5567 } 5568 ahc_outb(ahc, SCBPTR, curscbptr); 5569 5570 found += ahc_search_untagged_queues(ahc, /*aic_io_ctx_t*/NULL, target, 5571 channel, lun, status, action); 5572 5573 if (action == SEARCH_COMPLETE) 5574 ahc_release_untagged_queues(ahc); 5575 return (found); 5576 } 5577 5578 int 5579 ahc_search_untagged_queues(struct ahc_softc *ahc, aic_io_ctx_t ctx, 5580 int target, char channel, int lun, uint32_t status, 5581 ahc_search_action action) 5582 { 5583 struct scb *scb; 5584 int maxtarget; 5585 int found; 5586 int i; 5587 5588 if (action == SEARCH_COMPLETE) { 5589 /* 5590 * Don't attempt to run any queued untagged transactions 5591 * until we are done with the abort process. 5592 */ 5593 ahc_freeze_untagged_queues(ahc); 5594 } 5595 5596 found = 0; 5597 i = 0; 5598 if ((ahc->flags & AHC_SCB_BTT) == 0) { 5599 maxtarget = 16; 5600 if (target != CAM_TARGET_WILDCARD) { 5601 i = target; 5602 if (channel == 'B') 5603 i += 8; 5604 maxtarget = i + 1; 5605 } 5606 } else { 5607 maxtarget = 0; 5608 } 5609 5610 for (; i < maxtarget; i++) { 5611 struct scb_tailq *untagged_q; 5612 struct scb *next_scb; 5613 5614 untagged_q = &(ahc->untagged_queues[i]); 5615 next_scb = TAILQ_FIRST(untagged_q); 5616 while (next_scb != NULL) { 5617 scb = next_scb; 5618 next_scb = TAILQ_NEXT(scb, links.tqe); 5619 5620 /* 5621 * The head of the list may be the currently 5622 * active untagged command for a device. 5623 * We're only searching for commands that 5624 * have not been started. A transaction 5625 * marked active but still in the qinfifo 5626 * is removed by the qinfifo scanning code 5627 * above. 5628 */ 5629 if ((scb->flags & SCB_ACTIVE) != 0) 5630 continue; 5631 5632 if (ahc_match_scb(ahc, scb, target, channel, lun, 5633 SCB_LIST_NULL, ROLE_INITIATOR) == 0 5634 || (ctx != NULL && ctx != scb->io_ctx)) 5635 continue; 5636 5637 /* 5638 * We found an scb that needs to be acted on. 5639 */ 5640 found++; 5641 switch (action) { 5642 case SEARCH_COMPLETE: 5643 { 5644 cam_status ostat; 5645 cam_status cstat; 5646 5647 ostat = aic_get_transaction_status(scb); 5648 if (ostat == CAM_REQ_INPROG) 5649 aic_set_transaction_status(scb, status); 5650 cstat = aic_get_transaction_status(scb); 5651 if (cstat != CAM_REQ_CMP) 5652 aic_freeze_scb(scb); 5653 ahc_done(ahc, scb); 5654 break; 5655 } 5656 case SEARCH_REMOVE: 5657 scb->flags &= ~SCB_UNTAGGEDQ; 5658 TAILQ_REMOVE(untagged_q, scb, links.tqe); 5659 break; 5660 case SEARCH_COUNT: 5661 break; 5662 } 5663 } 5664 } 5665 5666 if (action == SEARCH_COMPLETE) 5667 ahc_release_untagged_queues(ahc); 5668 return (found); 5669 } 5670 5671 int 5672 ahc_search_disc_list(struct ahc_softc *ahc, int target, char channel, 5673 int lun, u_int tag, int stop_on_first, int remove, 5674 int save_state) 5675 { 5676 struct scb *scbp; 5677 u_int next; 5678 u_int prev; 5679 u_int count; 5680 u_int active_scb; 5681 5682 count = 0; 5683 next = ahc_inb(ahc, DISCONNECTED_SCBH); 5684 prev = SCB_LIST_NULL; 5685 5686 if (save_state) { 5687 /* restore this when we're done */ 5688 active_scb = ahc_inb(ahc, SCBPTR); 5689 } else 5690 /* Silence compiler */ 5691 active_scb = SCB_LIST_NULL; 5692 5693 while (next != SCB_LIST_NULL) { 5694 u_int scb_index; 5695 5696 ahc_outb(ahc, SCBPTR, next); 5697 scb_index = ahc_inb(ahc, SCB_TAG); 5698 if (scb_index >= ahc->scb_data->numscbs) { 5699 printf("Disconnected List inconsistency. " 5700 "SCB index == %d, yet numscbs == %d.", 5701 scb_index, ahc->scb_data->numscbs); 5702 ahc_dump_card_state(ahc); 5703 panic("for safety"); 5704 } 5705 5706 if (next == prev) { 5707 panic("Disconnected List Loop. " 5708 "cur SCBPTR == %x, prev SCBPTR == %x.", 5709 next, prev); 5710 } 5711 scbp = ahc_lookup_scb(ahc, scb_index); 5712 if (ahc_match_scb(ahc, scbp, target, channel, lun, 5713 tag, ROLE_INITIATOR)) { 5714 count++; 5715 if (remove) { 5716 next = 5717 ahc_rem_scb_from_disc_list(ahc, prev, next); 5718 } else { 5719 prev = next; 5720 next = ahc_inb(ahc, SCB_NEXT); 5721 } 5722 if (stop_on_first) 5723 break; 5724 } else { 5725 prev = next; 5726 next = ahc_inb(ahc, SCB_NEXT); 5727 } 5728 } 5729 if (save_state) 5730 ahc_outb(ahc, SCBPTR, active_scb); 5731 return (count); 5732 } 5733 5734 /* 5735 * Remove an SCB from the on chip list of disconnected transactions. 5736 * This is empty/unused if we are not performing SCB paging. 5737 */ 5738 static u_int 5739 ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, u_int prev, u_int scbptr) 5740 { 5741 u_int next; 5742 5743 ahc_outb(ahc, SCBPTR, scbptr); 5744 next = ahc_inb(ahc, SCB_NEXT); 5745 5746 ahc_outb(ahc, SCB_CONTROL, 0); 5747 5748 ahc_add_curscb_to_free_list(ahc); 5749 5750 if (prev != SCB_LIST_NULL) { 5751 ahc_outb(ahc, SCBPTR, prev); 5752 ahc_outb(ahc, SCB_NEXT, next); 5753 } else 5754 ahc_outb(ahc, DISCONNECTED_SCBH, next); 5755 5756 return (next); 5757 } 5758 5759 /* 5760 * Add the SCB as selected by SCBPTR onto the on chip list of 5761 * free hardware SCBs. This list is empty/unused if we are not 5762 * performing SCB paging. 5763 */ 5764 static void 5765 ahc_add_curscb_to_free_list(struct ahc_softc *ahc) 5766 { 5767 /* 5768 * Invalidate the tag so that our abort 5769 * routines don't think it's active. 5770 */ 5771 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL); 5772 5773 if ((ahc->flags & AHC_PAGESCBS) != 0) { 5774 ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH)); 5775 ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR)); 5776 } 5777 } 5778 5779 /* 5780 * Manipulate the waiting for selection list and return the 5781 * scb that follows the one that we remove. 5782 */ 5783 static u_int 5784 ahc_rem_wscb(struct ahc_softc *ahc, u_int scbpos, u_int prev) 5785 { 5786 u_int curscb, next; 5787 5788 /* 5789 * Select the SCB we want to abort and 5790 * pull the next pointer out of it. 5791 */ 5792 curscb = ahc_inb(ahc, SCBPTR); 5793 ahc_outb(ahc, SCBPTR, scbpos); 5794 next = ahc_inb(ahc, SCB_NEXT); 5795 5796 /* Clear the necessary fields */ 5797 ahc_outb(ahc, SCB_CONTROL, 0); 5798 5799 ahc_add_curscb_to_free_list(ahc); 5800 5801 /* update the waiting list */ 5802 if (prev == SCB_LIST_NULL) { 5803 /* First in the list */ 5804 ahc_outb(ahc, WAITING_SCBH, next); 5805 5806 /* 5807 * Ensure we aren't attempting to perform 5808 * selection for this entry. 5809 */ 5810 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); 5811 } else { 5812 /* 5813 * Select the scb that pointed to us 5814 * and update its next pointer. 5815 */ 5816 ahc_outb(ahc, SCBPTR, prev); 5817 ahc_outb(ahc, SCB_NEXT, next); 5818 } 5819 5820 /* 5821 * Point us back at the original scb position. 5822 */ 5823 ahc_outb(ahc, SCBPTR, curscb); 5824 return next; 5825 } 5826 5827 /******************************** Error Handling ******************************/ 5828 /* 5829 * Abort all SCBs that match the given description (target/channel/lun/tag), 5830 * setting their status to the passed in status if the status has not already 5831 * been modified from CAM_REQ_INPROG. This routine assumes that the sequencer 5832 * is paused before it is called. 5833 */ 5834 int 5835 ahc_abort_scbs(struct ahc_softc *ahc, int target, char channel, 5836 int lun, u_int tag, role_t role, uint32_t status) 5837 { 5838 struct scb *scbp; 5839 struct scb *scbp_next; 5840 u_int active_scb; 5841 int i, j; 5842 int maxtarget; 5843 int minlun; 5844 int maxlun; 5845 5846 int found; 5847 5848 /* 5849 * Don't attempt to run any queued untagged transactions 5850 * until we are done with the abort process. 5851 */ 5852 ahc_freeze_untagged_queues(ahc); 5853 5854 /* restore this when we're done */ 5855 active_scb = ahc_inb(ahc, SCBPTR); 5856 5857 found = ahc_search_qinfifo(ahc, target, channel, lun, SCB_LIST_NULL, 5858 role, CAM_REQUEUE_REQ, SEARCH_COMPLETE); 5859 5860 /* 5861 * Clean out the busy target table for any untagged commands. 5862 */ 5863 i = 0; 5864 maxtarget = 16; 5865 if (target != CAM_TARGET_WILDCARD) { 5866 i = target; 5867 if (channel == 'B') 5868 i += 8; 5869 maxtarget = i + 1; 5870 } 5871 5872 if (lun == CAM_LUN_WILDCARD) { 5873 /* 5874 * Unless we are using an SCB based 5875 * busy targets table, there is only 5876 * one table entry for all luns of 5877 * a target. 5878 */ 5879 minlun = 0; 5880 maxlun = 1; 5881 if ((ahc->flags & AHC_SCB_BTT) != 0) 5882 maxlun = AHC_NUM_LUNS; 5883 } else { 5884 minlun = lun; 5885 maxlun = lun + 1; 5886 } 5887 5888 if (role != ROLE_TARGET) { 5889 for (;i < maxtarget; i++) { 5890 for (j = minlun;j < maxlun; j++) { 5891 u_int scbid; 5892 u_int tcl; 5893 5894 tcl = BUILD_TCL(i << 4, j); 5895 scbid = ahc_index_busy_tcl(ahc, tcl); 5896 scbp = ahc_lookup_scb(ahc, scbid); 5897 if (scbp == NULL 5898 || ahc_match_scb(ahc, scbp, target, channel, 5899 lun, tag, role) == 0) 5900 continue; 5901 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, j)); 5902 } 5903 } 5904 5905 /* 5906 * Go through the disconnected list and remove any entries we 5907 * have queued for completion, 0'ing their control byte too. 5908 * We save the active SCB and restore it ourselves, so there 5909 * is no reason for this search to restore it too. 5910 */ 5911 ahc_search_disc_list(ahc, target, channel, lun, tag, 5912 /*stop_on_first*/FALSE, /*remove*/TRUE, 5913 /*save_state*/FALSE); 5914 } 5915 5916 /* 5917 * Go through the hardware SCB array looking for commands that 5918 * were active but not on any list. In some cases, these remnants 5919 * might not still have mappings in the scbindex array (e.g. unexpected 5920 * bus free with the same scb queued for an abort). Don't hold this 5921 * against them. 5922 */ 5923 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 5924 u_int scbid; 5925 5926 ahc_outb(ahc, SCBPTR, i); 5927 scbid = ahc_inb(ahc, SCB_TAG); 5928 scbp = ahc_lookup_scb(ahc, scbid); 5929 if ((scbp == NULL && scbid != SCB_LIST_NULL) 5930 || (scbp != NULL 5931 && ahc_match_scb(ahc, scbp, target, channel, lun, tag, role))) 5932 ahc_add_curscb_to_free_list(ahc); 5933 } 5934 5935 /* 5936 * Go through the pending CCB list and look for 5937 * commands for this target that are still active. 5938 * These are other tagged commands that were 5939 * disconnected when the reset occurred. 5940 */ 5941 scbp_next = LIST_FIRST(&ahc->pending_scbs); 5942 while (scbp_next != NULL) { 5943 scbp = scbp_next; 5944 scbp_next = LIST_NEXT(scbp, pending_links); 5945 if (ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)) { 5946 cam_status ostat; 5947 5948 ostat = aic_get_transaction_status(scbp); 5949 if (ostat == CAM_REQ_INPROG) 5950 aic_set_transaction_status(scbp, status); 5951 if (aic_get_transaction_status(scbp) != CAM_REQ_CMP) 5952 aic_freeze_scb(scbp); 5953 if ((scbp->flags & SCB_ACTIVE) == 0) 5954 printf("Inactive SCB on pending list\n"); 5955 ahc_done(ahc, scbp); 5956 found++; 5957 } 5958 } 5959 ahc_outb(ahc, SCBPTR, active_scb); 5960 ahc_platform_abort_scbs(ahc, target, channel, lun, tag, role, status); 5961 ahc_release_untagged_queues(ahc); 5962 return found; 5963 } 5964 5965 static void 5966 ahc_reset_current_bus(struct ahc_softc *ahc) 5967 { 5968 uint8_t scsiseq; 5969 5970 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST); 5971 scsiseq = ahc_inb(ahc, SCSISEQ); 5972 ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO); 5973 ahc_flush_device_writes(ahc); 5974 aic_delay(AHC_BUSRESET_DELAY); 5975 /* Turn off the bus reset */ 5976 ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO); 5977 5978 ahc_clear_intstat(ahc); 5979 5980 /* Re-enable reset interrupts */ 5981 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST); 5982 } 5983 5984 int 5985 ahc_reset_channel(struct ahc_softc *ahc, char channel, int initiate_reset) 5986 { 5987 struct ahc_devinfo devinfo; 5988 u_int initiator, target, max_scsiid; 5989 u_int sblkctl; 5990 u_int scsiseq; 5991 u_int simode1; 5992 int found; 5993 int restart_needed; 5994 char cur_channel; 5995 5996 ahc->pending_device = NULL; 5997 5998 ahc_compile_devinfo(&devinfo, 5999 CAM_TARGET_WILDCARD, 6000 CAM_TARGET_WILDCARD, 6001 CAM_LUN_WILDCARD, 6002 channel, ROLE_UNKNOWN); 6003 ahc_pause(ahc); 6004 6005 /* Make sure the sequencer is in a safe location. */ 6006 ahc_clear_critical_section(ahc); 6007 6008 /* 6009 * Run our command complete fifos to ensure that we perform 6010 * completion processing on any commands that 'completed' 6011 * before the reset occurred. 6012 */ 6013 ahc_run_qoutfifo(ahc); 6014 #ifdef AHC_TARGET_MODE 6015 /* 6016 * XXX - In Twin mode, the tqinfifo may have commands 6017 * for an unaffected channel in it. However, if 6018 * we have run out of ATIO resources to drain that 6019 * queue, we may not get them all out here. Further, 6020 * the blocked transactions for the reset channel 6021 * should just be killed off, irrespective of whether 6022 * we are blocked on ATIO resources. Write a routine 6023 * to compact the tqinfifo appropriately. 6024 */ 6025 if ((ahc->flags & AHC_TARGETROLE) != 0) { 6026 ahc_run_tqinfifo(ahc, /*paused*/TRUE); 6027 } 6028 #endif 6029 6030 /* 6031 * Reset the bus if we are initiating this reset 6032 */ 6033 sblkctl = ahc_inb(ahc, SBLKCTL); 6034 cur_channel = 'A'; 6035 if ((ahc->features & AHC_TWIN) != 0 6036 && ((sblkctl & SELBUSB) != 0)) 6037 cur_channel = 'B'; 6038 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); 6039 if (cur_channel != channel) { 6040 /* Case 1: Command for another bus is active 6041 * Stealthily reset the other bus without 6042 * upsetting the current bus. 6043 */ 6044 ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB); 6045 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST); 6046 #ifdef AHC_TARGET_MODE 6047 /* 6048 * Bus resets clear ENSELI, so we cannot 6049 * defer re-enabling bus reset interrupts 6050 * if we are in target mode. 6051 */ 6052 if ((ahc->flags & AHC_TARGETROLE) != 0) 6053 simode1 |= ENSCSIRST; 6054 #endif 6055 ahc_outb(ahc, SIMODE1, simode1); 6056 if (initiate_reset) 6057 ahc_reset_current_bus(ahc); 6058 ahc_clear_intstat(ahc); 6059 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP)); 6060 ahc_outb(ahc, SBLKCTL, sblkctl); 6061 restart_needed = FALSE; 6062 } else { 6063 /* Case 2: A command from this bus is active or we're idle */ 6064 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST); 6065 #ifdef AHC_TARGET_MODE 6066 /* 6067 * Bus resets clear ENSELI, so we cannot 6068 * defer re-enabling bus reset interrupts 6069 * if we are in target mode. 6070 */ 6071 if ((ahc->flags & AHC_TARGETROLE) != 0) 6072 simode1 |= ENSCSIRST; 6073 #endif 6074 ahc_outb(ahc, SIMODE1, simode1); 6075 if (initiate_reset) 6076 ahc_reset_current_bus(ahc); 6077 ahc_clear_intstat(ahc); 6078 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP)); 6079 restart_needed = TRUE; 6080 } 6081 6082 /* 6083 * Clean up all the state information for the 6084 * pending transactions on this bus. 6085 */ 6086 found = ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, channel, 6087 CAM_LUN_WILDCARD, SCB_LIST_NULL, 6088 ROLE_UNKNOWN, CAM_SCSI_BUS_RESET); 6089 6090 max_scsiid = (ahc->features & AHC_WIDE) ? 15 : 7; 6091 6092 #ifdef AHC_TARGET_MODE 6093 /* 6094 * Send an immediate notify ccb to all target more peripheral 6095 * drivers affected by this action. 6096 */ 6097 for (target = 0; target <= max_scsiid; target++) { 6098 struct ahc_tmode_tstate* tstate; 6099 u_int lun; 6100 6101 tstate = ahc->enabled_targets[target]; 6102 if (tstate == NULL) 6103 continue; 6104 for (lun = 0; lun < AHC_NUM_LUNS; lun++) { 6105 struct ahc_tmode_lstate* lstate; 6106 6107 lstate = tstate->enabled_luns[lun]; 6108 if (lstate == NULL) 6109 continue; 6110 6111 ahc_queue_lstate_event(ahc, lstate, CAM_TARGET_WILDCARD, 6112 EVENT_TYPE_BUS_RESET, /*arg*/0); 6113 ahc_send_lstate_events(ahc, lstate); 6114 } 6115 } 6116 #endif 6117 /* Notify the XPT that a bus reset occurred */ 6118 ahc_send_async(ahc, devinfo.channel, CAM_TARGET_WILDCARD, 6119 CAM_LUN_WILDCARD, AC_BUS_RESET, NULL); 6120 6121 /* 6122 * Revert to async/narrow transfers until we renegotiate. 6123 */ 6124 for (target = 0; target <= max_scsiid; target++) { 6125 if (ahc->enabled_targets[target] == NULL) 6126 continue; 6127 for (initiator = 0; initiator <= max_scsiid; initiator++) { 6128 struct ahc_devinfo devinfo; 6129 6130 ahc_compile_devinfo(&devinfo, target, initiator, 6131 CAM_LUN_WILDCARD, 6132 channel, ROLE_UNKNOWN); 6133 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 6134 AHC_TRANS_CUR, /*paused*/TRUE); 6135 ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL, 6136 /*period*/0, /*offset*/0, 6137 /*ppr_options*/0, AHC_TRANS_CUR, 6138 /*paused*/TRUE); 6139 } 6140 } 6141 6142 if (restart_needed) 6143 ahc_restart(ahc); 6144 else 6145 ahc_unpause(ahc); 6146 return found; 6147 } 6148 6149 /***************************** Residual Processing ****************************/ 6150 /* 6151 * Calculate the residual for a just completed SCB. 6152 */ 6153 void 6154 ahc_calc_residual(struct ahc_softc *ahc, struct scb *scb) 6155 { 6156 struct hardware_scb *hscb; 6157 struct status_pkt *spkt; 6158 uint32_t sgptr; 6159 uint32_t resid_sgptr; 6160 uint32_t resid; 6161 6162 /* 6163 * 5 cases. 6164 * 1) No residual. 6165 * SG_RESID_VALID clear in sgptr. 6166 * 2) Transferless command 6167 * 3) Never performed any transfers. 6168 * sgptr has SG_FULL_RESID set. 6169 * 4) No residual but target did not 6170 * save data pointers after the 6171 * last transfer, so sgptr was 6172 * never updated. 6173 * 5) We have a partial residual. 6174 * Use residual_sgptr to determine 6175 * where we are. 6176 */ 6177 6178 hscb = scb->hscb; 6179 sgptr = aic_le32toh(hscb->sgptr); 6180 if ((sgptr & SG_RESID_VALID) == 0) 6181 /* Case 1 */ 6182 return; 6183 sgptr &= ~SG_RESID_VALID; 6184 6185 if ((sgptr & SG_LIST_NULL) != 0) 6186 /* Case 2 */ 6187 return; 6188 6189 spkt = &hscb->shared_data.status; 6190 resid_sgptr = aic_le32toh(spkt->residual_sg_ptr); 6191 if ((sgptr & SG_FULL_RESID) != 0) { 6192 /* Case 3 */ 6193 resid = aic_get_transfer_length(scb); 6194 } else if ((resid_sgptr & SG_LIST_NULL) != 0) { 6195 /* Case 4 */ 6196 return; 6197 } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) { 6198 panic("Bogus resid sgptr value 0x%x\n", resid_sgptr); 6199 /* NOTREACHED */ 6200 return; 6201 } else { 6202 struct ahc_dma_seg *sg; 6203 6204 /* 6205 * Remainder of the SG where the transfer 6206 * stopped. 6207 */ 6208 resid = aic_le32toh(spkt->residual_datacnt) & AHC_SG_LEN_MASK; 6209 sg = ahc_sg_bus_to_virt(scb, resid_sgptr & SG_PTR_MASK); 6210 6211 /* The residual sg_ptr always points to the next sg */ 6212 sg--; 6213 6214 /* 6215 * Add up the contents of all residual 6216 * SG segments that are after the SG where 6217 * the transfer stopped. 6218 */ 6219 while ((aic_le32toh(sg->len) & AHC_DMA_LAST_SEG) == 0) { 6220 sg++; 6221 resid += aic_le32toh(sg->len) & AHC_SG_LEN_MASK; 6222 } 6223 } 6224 if ((scb->flags & SCB_SENSE) == 0) 6225 aic_set_residual(scb, resid); 6226 else 6227 aic_set_sense_residual(scb, resid); 6228 6229 #ifdef AHC_DEBUG 6230 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 6231 ahc_print_path(ahc, scb); 6232 printf("Handled %sResidual of %d bytes\n", 6233 (scb->flags & SCB_SENSE) ? "Sense " : "", resid); 6234 } 6235 #endif 6236 } 6237 6238 /******************************* Target Mode **********************************/ 6239 #ifdef AHC_TARGET_MODE 6240 /* 6241 * Add a target mode event to this lun's queue 6242 */ 6243 static void 6244 ahc_queue_lstate_event(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate, 6245 u_int initiator_id, u_int event_type, u_int event_arg) 6246 { 6247 struct ahc_tmode_event *event; 6248 int pending; 6249 6250 xpt_freeze_devq(lstate->path, /*count*/1); 6251 if (lstate->event_w_idx >= lstate->event_r_idx) 6252 pending = lstate->event_w_idx - lstate->event_r_idx; 6253 else 6254 pending = AHC_TMODE_EVENT_BUFFER_SIZE + 1 6255 - (lstate->event_r_idx - lstate->event_w_idx); 6256 6257 if (event_type == EVENT_TYPE_BUS_RESET 6258 || event_type == MSG_BUS_DEV_RESET) { 6259 /* 6260 * Any earlier events are irrelevant, so reset our buffer. 6261 * This has the effect of allowing us to deal with reset 6262 * floods (an external device holding down the reset line) 6263 * without losing the event that is really interesting. 6264 */ 6265 lstate->event_r_idx = 0; 6266 lstate->event_w_idx = 0; 6267 xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE); 6268 } 6269 6270 if (pending == AHC_TMODE_EVENT_BUFFER_SIZE) { 6271 xpt_print_path(lstate->path); 6272 printf("immediate event %x:%x lost\n", 6273 lstate->event_buffer[lstate->event_r_idx].event_type, 6274 lstate->event_buffer[lstate->event_r_idx].event_arg); 6275 lstate->event_r_idx++; 6276 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE) 6277 lstate->event_r_idx = 0; 6278 xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE); 6279 } 6280 6281 event = &lstate->event_buffer[lstate->event_w_idx]; 6282 event->initiator_id = initiator_id; 6283 event->event_type = event_type; 6284 event->event_arg = event_arg; 6285 lstate->event_w_idx++; 6286 if (lstate->event_w_idx == AHC_TMODE_EVENT_BUFFER_SIZE) 6287 lstate->event_w_idx = 0; 6288 } 6289 6290 /* 6291 * Send any target mode events queued up waiting 6292 * for immediate notify resources. 6293 */ 6294 void 6295 ahc_send_lstate_events(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate) 6296 { 6297 struct ccb_hdr *ccbh; 6298 struct ccb_immediate_notify *inot; 6299 6300 while (lstate->event_r_idx != lstate->event_w_idx 6301 && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) { 6302 struct ahc_tmode_event *event; 6303 6304 event = &lstate->event_buffer[lstate->event_r_idx]; 6305 SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle); 6306 inot = (struct ccb_immediate_notify *)ccbh; 6307 switch (event->event_type) { 6308 case EVENT_TYPE_BUS_RESET: 6309 ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN; 6310 break; 6311 default: 6312 ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN; 6313 inot->arg = event->event_type; 6314 inot->seq_id = event->event_arg; 6315 break; 6316 } 6317 inot->initiator_id = event->initiator_id; 6318 xpt_done((union ccb *)inot); 6319 lstate->event_r_idx++; 6320 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE) 6321 lstate->event_r_idx = 0; 6322 } 6323 } 6324 #endif 6325 6326 /******************** Sequencer Program Patching/Download *********************/ 6327 6328 #ifdef AHC_DUMP_SEQ 6329 void 6330 ahc_dumpseq(struct ahc_softc* ahc) 6331 { 6332 int i; 6333 6334 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); 6335 ahc_outb(ahc, SEQADDR0, 0); 6336 ahc_outb(ahc, SEQADDR1, 0); 6337 for (i = 0; i < ahc->instruction_ram_size; i++) { 6338 uint8_t ins_bytes[4]; 6339 6340 ahc_insb(ahc, SEQRAM, ins_bytes, 4); 6341 printf("0x%08x\n", ins_bytes[0] << 24 6342 | ins_bytes[1] << 16 6343 | ins_bytes[2] << 8 6344 | ins_bytes[3]); 6345 } 6346 } 6347 #endif 6348 6349 static int 6350 ahc_loadseq(struct ahc_softc *ahc) 6351 { 6352 struct cs cs_table[num_critical_sections]; 6353 u_int begin_set[num_critical_sections]; 6354 u_int end_set[num_critical_sections]; 6355 struct patch *cur_patch; 6356 u_int cs_count; 6357 u_int cur_cs; 6358 u_int i; 6359 u_int skip_addr; 6360 u_int sg_prefetch_cnt; 6361 int downloaded; 6362 uint8_t download_consts[7]; 6363 6364 /* 6365 * Start out with 0 critical sections 6366 * that apply to this firmware load. 6367 */ 6368 cs_count = 0; 6369 cur_cs = 0; 6370 memset(begin_set, 0, sizeof(begin_set)); 6371 memset(end_set, 0, sizeof(end_set)); 6372 6373 /* Setup downloadable constant table */ 6374 download_consts[QOUTFIFO_OFFSET] = 0; 6375 if (ahc->targetcmds != NULL) 6376 download_consts[QOUTFIFO_OFFSET] += 32; 6377 download_consts[QINFIFO_OFFSET] = download_consts[QOUTFIFO_OFFSET] + 1; 6378 download_consts[CACHESIZE_MASK] = ahc->pci_cachesize - 1; 6379 download_consts[INVERTED_CACHESIZE_MASK] = ~(ahc->pci_cachesize - 1); 6380 sg_prefetch_cnt = ahc->pci_cachesize; 6381 if (sg_prefetch_cnt < (2 * sizeof(struct ahc_dma_seg))) 6382 sg_prefetch_cnt = 2 * sizeof(struct ahc_dma_seg); 6383 download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt; 6384 download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_cnt - 1); 6385 download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_cnt - 1); 6386 6387 cur_patch = patches; 6388 downloaded = 0; 6389 skip_addr = 0; 6390 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); 6391 ahc_outb(ahc, SEQADDR0, 0); 6392 ahc_outb(ahc, SEQADDR1, 0); 6393 6394 for (i = 0; i < sizeof(seqprog)/4; i++) { 6395 if (ahc_check_patch(ahc, &cur_patch, i, &skip_addr) == 0) { 6396 /* 6397 * Don't download this instruction as it 6398 * is in a patch that was removed. 6399 */ 6400 continue; 6401 } 6402 6403 if (downloaded == ahc->instruction_ram_size) { 6404 /* 6405 * We're about to exceed the instruction 6406 * storage capacity for this chip. Fail 6407 * the load. 6408 */ 6409 printf("\n%s: Program too large for instruction memory " 6410 "size of %d!\n", ahc_name(ahc), 6411 ahc->instruction_ram_size); 6412 return (ENOMEM); 6413 } 6414 6415 /* 6416 * Move through the CS table until we find a CS 6417 * that might apply to this instruction. 6418 */ 6419 for (; cur_cs < num_critical_sections; cur_cs++) { 6420 if (critical_sections[cur_cs].end <= i) { 6421 if (begin_set[cs_count] == TRUE 6422 && end_set[cs_count] == FALSE) { 6423 cs_table[cs_count].end = downloaded; 6424 end_set[cs_count] = TRUE; 6425 cs_count++; 6426 } 6427 continue; 6428 } 6429 if (critical_sections[cur_cs].begin <= i 6430 && begin_set[cs_count] == FALSE) { 6431 cs_table[cs_count].begin = downloaded; 6432 begin_set[cs_count] = TRUE; 6433 } 6434 break; 6435 } 6436 ahc_download_instr(ahc, i, download_consts); 6437 downloaded++; 6438 } 6439 6440 ahc->num_critical_sections = cs_count; 6441 if (cs_count != 0) { 6442 cs_count *= sizeof(struct cs); 6443 ahc->critical_sections = malloc(cs_count, M_DEVBUF, M_NOWAIT); 6444 if (ahc->critical_sections == NULL) 6445 panic("ahc_loadseq: Could not malloc"); 6446 memcpy(ahc->critical_sections, cs_table, cs_count); 6447 } 6448 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE); 6449 6450 if (bootverbose) { 6451 printf(" %d instructions downloaded\n", downloaded); 6452 printf("%s: Features 0x%x, Bugs 0x%x, Flags 0x%x\n", 6453 ahc_name(ahc), ahc->features, ahc->bugs, ahc->flags); 6454 } 6455 return (0); 6456 } 6457 6458 static int 6459 ahc_check_patch(struct ahc_softc *ahc, struct patch **start_patch, 6460 u_int start_instr, u_int *skip_addr) 6461 { 6462 struct patch *cur_patch; 6463 struct patch *last_patch; 6464 u_int num_patches; 6465 6466 num_patches = sizeof(patches)/sizeof(struct patch); 6467 last_patch = &patches[num_patches]; 6468 cur_patch = *start_patch; 6469 6470 while (cur_patch < last_patch && start_instr == cur_patch->begin) { 6471 if (cur_patch->patch_func(ahc) == 0) { 6472 /* Start rejecting code */ 6473 *skip_addr = start_instr + cur_patch->skip_instr; 6474 cur_patch += cur_patch->skip_patch; 6475 } else { 6476 /* Accepted this patch. Advance to the next 6477 * one and wait for our instruction pointer to 6478 * hit this point. 6479 */ 6480 cur_patch++; 6481 } 6482 } 6483 6484 *start_patch = cur_patch; 6485 if (start_instr < *skip_addr) 6486 /* Still skipping */ 6487 return (0); 6488 6489 return (1); 6490 } 6491 6492 static void 6493 ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts) 6494 { 6495 union ins_formats instr; 6496 struct ins_format1 *fmt1_ins; 6497 struct ins_format3 *fmt3_ins; 6498 u_int opcode; 6499 6500 /* 6501 * The firmware is always compiled into a little endian format. 6502 */ 6503 instr.integer = aic_le32toh(*(uint32_t*)&seqprog[instrptr * 4]); 6504 6505 fmt1_ins = &instr.format1; 6506 fmt3_ins = NULL; 6507 6508 /* Pull the opcode */ 6509 opcode = instr.format1.opcode; 6510 switch (opcode) { 6511 case AIC_OP_JMP: 6512 case AIC_OP_JC: 6513 case AIC_OP_JNC: 6514 case AIC_OP_CALL: 6515 case AIC_OP_JNE: 6516 case AIC_OP_JNZ: 6517 case AIC_OP_JE: 6518 case AIC_OP_JZ: 6519 { 6520 struct patch *cur_patch; 6521 int address_offset; 6522 u_int address; 6523 u_int skip_addr; 6524 u_int i; 6525 6526 fmt3_ins = &instr.format3; 6527 address_offset = 0; 6528 address = fmt3_ins->address; 6529 cur_patch = patches; 6530 skip_addr = 0; 6531 6532 for (i = 0; i < address;) { 6533 ahc_check_patch(ahc, &cur_patch, i, &skip_addr); 6534 6535 if (skip_addr > i) { 6536 int end_addr; 6537 6538 end_addr = MIN(address, skip_addr); 6539 address_offset += end_addr - i; 6540 i = skip_addr; 6541 } else { 6542 i++; 6543 } 6544 } 6545 address -= address_offset; 6546 fmt3_ins->address = address; 6547 /* FALLTHROUGH */ 6548 } 6549 case AIC_OP_OR: 6550 case AIC_OP_AND: 6551 case AIC_OP_XOR: 6552 case AIC_OP_ADD: 6553 case AIC_OP_ADC: 6554 case AIC_OP_BMOV: 6555 if (fmt1_ins->parity != 0) { 6556 fmt1_ins->immediate = dconsts[fmt1_ins->immediate]; 6557 } 6558 fmt1_ins->parity = 0; 6559 if ((ahc->features & AHC_CMD_CHAN) == 0 6560 && opcode == AIC_OP_BMOV) { 6561 /* 6562 * Block move was added at the same time 6563 * as the command channel. Verify that 6564 * this is only a move of a single element 6565 * and convert the BMOV to a MOV 6566 * (AND with an immediate of FF). 6567 */ 6568 if (fmt1_ins->immediate != 1) 6569 panic("%s: BMOV not supported\n", 6570 ahc_name(ahc)); 6571 fmt1_ins->opcode = AIC_OP_AND; 6572 fmt1_ins->immediate = 0xff; 6573 } 6574 /* FALLTHROUGH */ 6575 case AIC_OP_ROL: 6576 if ((ahc->features & AHC_ULTRA2) != 0) { 6577 int i, count; 6578 6579 /* Calculate odd parity for the instruction */ 6580 for (i = 0, count = 0; i < 31; i++) { 6581 uint32_t mask; 6582 6583 mask = 0x01 << i; 6584 if ((instr.integer & mask) != 0) 6585 count++; 6586 } 6587 if ((count & 0x01) == 0) 6588 instr.format1.parity = 1; 6589 } else { 6590 /* Compress the instruction for older sequencers */ 6591 if (fmt3_ins != NULL) { 6592 instr.integer = 6593 fmt3_ins->immediate 6594 | (fmt3_ins->source << 8) 6595 | (fmt3_ins->address << 16) 6596 | (fmt3_ins->opcode << 25); 6597 } else { 6598 instr.integer = 6599 fmt1_ins->immediate 6600 | (fmt1_ins->source << 8) 6601 | (fmt1_ins->destination << 16) 6602 | (fmt1_ins->ret << 24) 6603 | (fmt1_ins->opcode << 25); 6604 } 6605 } 6606 /* The sequencer is a little endian cpu */ 6607 instr.integer = aic_htole32(instr.integer); 6608 ahc_outsb(ahc, SEQRAM, instr.bytes, 4); 6609 break; 6610 default: 6611 panic("Unknown opcode encountered in seq program"); 6612 break; 6613 } 6614 } 6615 6616 int 6617 ahc_print_register(ahc_reg_parse_entry_t *table, u_int num_entries, 6618 const char *name, u_int address, u_int value, 6619 u_int *cur_column, u_int wrap_point) 6620 { 6621 int printed; 6622 u_int printed_mask; 6623 u_int dummy_column; 6624 6625 if (cur_column == NULL) { 6626 dummy_column = 0; 6627 cur_column = &dummy_column; 6628 } 6629 6630 if (*cur_column >= wrap_point) { 6631 printf("\n"); 6632 *cur_column = 0; 6633 } 6634 printed = printf("%s[0x%x]", name, value); 6635 if (table == NULL) { 6636 printed += printf(" "); 6637 *cur_column += printed; 6638 return (printed); 6639 } 6640 printed_mask = 0; 6641 while (printed_mask != 0xFF) { 6642 int entry; 6643 6644 for (entry = 0; entry < num_entries; entry++) { 6645 if (((value & table[entry].mask) 6646 != table[entry].value) 6647 || ((printed_mask & table[entry].mask) 6648 == table[entry].mask)) 6649 continue; 6650 6651 printed += printf("%s%s", 6652 printed_mask == 0 ? ":(" : "|", 6653 table[entry].name); 6654 printed_mask |= table[entry].mask; 6655 6656 break; 6657 } 6658 if (entry >= num_entries) 6659 break; 6660 } 6661 if (printed_mask != 0) 6662 printed += printf(") "); 6663 else 6664 printed += printf(" "); 6665 if (cur_column != NULL) 6666 *cur_column += printed; 6667 return (printed); 6668 } 6669 6670 void 6671 ahc_dump_card_state(struct ahc_softc *ahc) 6672 { 6673 struct scb *scb; 6674 struct scb_tailq *untagged_q; 6675 u_int cur_col; 6676 int paused; 6677 int target; 6678 int maxtarget; 6679 int i; 6680 uint8_t last_phase; 6681 uint8_t qinpos; 6682 uint8_t qintail; 6683 uint8_t qoutpos; 6684 uint8_t scb_index; 6685 uint8_t saved_scbptr; 6686 6687 if (ahc_is_paused(ahc)) { 6688 paused = 1; 6689 } else { 6690 paused = 0; 6691 ahc_pause(ahc); 6692 } 6693 6694 saved_scbptr = ahc_inb(ahc, SCBPTR); 6695 last_phase = ahc_inb(ahc, LASTPHASE); 6696 printf(">>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<\n" 6697 "%s: Dumping Card State %s, at SEQADDR 0x%x\n", 6698 ahc_name(ahc), ahc_lookup_phase_entry(last_phase)->phasemsg, 6699 ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8)); 6700 if (paused) 6701 printf("Card was paused\n"); 6702 printf("ACCUM = 0x%x, SINDEX = 0x%x, DINDEX = 0x%x, ARG_2 = 0x%x\n", 6703 ahc_inb(ahc, ACCUM), ahc_inb(ahc, SINDEX), ahc_inb(ahc, DINDEX), 6704 ahc_inb(ahc, ARG_2)); 6705 printf("HCNT = 0x%x SCBPTR = 0x%x\n", ahc_inb(ahc, HCNT), 6706 ahc_inb(ahc, SCBPTR)); 6707 cur_col = 0; 6708 if ((ahc->features & AHC_DT) != 0) 6709 ahc_scsiphase_print(ahc_inb(ahc, SCSIPHASE), &cur_col, 50); 6710 ahc_scsisigi_print(ahc_inb(ahc, SCSISIGI), &cur_col, 50); 6711 ahc_error_print(ahc_inb(ahc, ERROR), &cur_col, 50); 6712 ahc_scsibusl_print(ahc_inb(ahc, SCSIBUSL), &cur_col, 50); 6713 ahc_lastphase_print(ahc_inb(ahc, LASTPHASE), &cur_col, 50); 6714 ahc_scsiseq_print(ahc_inb(ahc, SCSISEQ), &cur_col, 50); 6715 ahc_sblkctl_print(ahc_inb(ahc, SBLKCTL), &cur_col, 50); 6716 ahc_scsirate_print(ahc_inb(ahc, SCSIRATE), &cur_col, 50); 6717 ahc_seqctl_print(ahc_inb(ahc, SEQCTL), &cur_col, 50); 6718 ahc_seq_flags_print(ahc_inb(ahc, SEQ_FLAGS), &cur_col, 50); 6719 ahc_sstat0_print(ahc_inb(ahc, SSTAT0), &cur_col, 50); 6720 ahc_sstat1_print(ahc_inb(ahc, SSTAT1), &cur_col, 50); 6721 ahc_sstat2_print(ahc_inb(ahc, SSTAT2), &cur_col, 50); 6722 ahc_sstat3_print(ahc_inb(ahc, SSTAT3), &cur_col, 50); 6723 ahc_simode0_print(ahc_inb(ahc, SIMODE0), &cur_col, 50); 6724 ahc_simode1_print(ahc_inb(ahc, SIMODE1), &cur_col, 50); 6725 ahc_sxfrctl0_print(ahc_inb(ahc, SXFRCTL0), &cur_col, 50); 6726 ahc_dfcntrl_print(ahc_inb(ahc, DFCNTRL), &cur_col, 50); 6727 ahc_dfstatus_print(ahc_inb(ahc, DFSTATUS), &cur_col, 50); 6728 if (cur_col != 0) 6729 printf("\n"); 6730 printf("STACK:"); 6731 for (i = 0; i < STACK_SIZE; i++) 6732 printf(" 0x%x", ahc_inb(ahc, STACK)|(ahc_inb(ahc, STACK) << 8)); 6733 printf("\nSCB count = %d\n", ahc->scb_data->numscbs); 6734 printf("Kernel NEXTQSCB = %d\n", ahc->next_queued_scb->hscb->tag); 6735 printf("Card NEXTQSCB = %d\n", ahc_inb(ahc, NEXT_QUEUED_SCB)); 6736 /* QINFIFO */ 6737 printf("QINFIFO entries: "); 6738 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 6739 qinpos = ahc_inb(ahc, SNSCB_QOFF); 6740 ahc_outb(ahc, SNSCB_QOFF, qinpos); 6741 } else 6742 qinpos = ahc_inb(ahc, QINPOS); 6743 qintail = ahc->qinfifonext; 6744 while (qinpos != qintail) { 6745 printf("%d ", ahc->qinfifo[qinpos]); 6746 qinpos++; 6747 } 6748 printf("\n"); 6749 6750 printf("Waiting Queue entries: "); 6751 scb_index = ahc_inb(ahc, WAITING_SCBH); 6752 i = 0; 6753 while (scb_index != SCB_LIST_NULL && i++ < 256) { 6754 ahc_outb(ahc, SCBPTR, scb_index); 6755 printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG)); 6756 scb_index = ahc_inb(ahc, SCB_NEXT); 6757 } 6758 printf("\n"); 6759 6760 printf("Disconnected Queue entries: "); 6761 scb_index = ahc_inb(ahc, DISCONNECTED_SCBH); 6762 i = 0; 6763 while (scb_index != SCB_LIST_NULL && i++ < 256) { 6764 ahc_outb(ahc, SCBPTR, scb_index); 6765 printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG)); 6766 scb_index = ahc_inb(ahc, SCB_NEXT); 6767 } 6768 printf("\n"); 6769 6770 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD); 6771 printf("QOUTFIFO entries: "); 6772 qoutpos = ahc->qoutfifonext; 6773 i = 0; 6774 while (ahc->qoutfifo[qoutpos] != SCB_LIST_NULL && i++ < 256) { 6775 printf("%d ", ahc->qoutfifo[qoutpos]); 6776 qoutpos++; 6777 } 6778 printf("\n"); 6779 6780 printf("Sequencer Free SCB List: "); 6781 scb_index = ahc_inb(ahc, FREE_SCBH); 6782 i = 0; 6783 while (scb_index != SCB_LIST_NULL && i++ < 256) { 6784 ahc_outb(ahc, SCBPTR, scb_index); 6785 printf("%d ", scb_index); 6786 scb_index = ahc_inb(ahc, SCB_NEXT); 6787 } 6788 printf("\n"); 6789 6790 printf("Sequencer SCB Info: "); 6791 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 6792 ahc_outb(ahc, SCBPTR, i); 6793 cur_col = printf("\n%3d ", i); 6794 6795 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), &cur_col, 60); 6796 ahc_scb_scsiid_print(ahc_inb(ahc, SCB_SCSIID), &cur_col, 60); 6797 ahc_scb_lun_print(ahc_inb(ahc, SCB_LUN), &cur_col, 60); 6798 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60); 6799 } 6800 printf("\n"); 6801 6802 printf("Pending list: "); 6803 i = 0; 6804 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { 6805 if (i++ > 256) 6806 break; 6807 cur_col = printf("\n%3d ", scb->hscb->tag); 6808 ahc_scb_control_print(scb->hscb->control, &cur_col, 60); 6809 ahc_scb_scsiid_print(scb->hscb->scsiid, &cur_col, 60); 6810 ahc_scb_lun_print(scb->hscb->lun, &cur_col, 60); 6811 if ((ahc->flags & AHC_PAGESCBS) == 0) { 6812 ahc_outb(ahc, SCBPTR, scb->hscb->tag); 6813 printf("("); 6814 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), 6815 &cur_col, 60); 6816 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60); 6817 printf(")"); 6818 } 6819 } 6820 printf("\n"); 6821 6822 printf("Kernel Free SCB list: "); 6823 i = 0; 6824 SLIST_FOREACH(scb, &ahc->scb_data->free_scbs, links.sle) { 6825 if (i++ > 256) 6826 break; 6827 printf("%d ", scb->hscb->tag); 6828 } 6829 printf("\n"); 6830 6831 maxtarget = (ahc->features & (AHC_WIDE|AHC_TWIN)) ? 15 : 7; 6832 for (target = 0; target <= maxtarget; target++) { 6833 untagged_q = &ahc->untagged_queues[target]; 6834 if (TAILQ_FIRST(untagged_q) == NULL) 6835 continue; 6836 printf("Untagged Q(%d): ", target); 6837 i = 0; 6838 TAILQ_FOREACH(scb, untagged_q, links.tqe) { 6839 if (i++ > 256) 6840 break; 6841 printf("%d ", scb->hscb->tag); 6842 } 6843 printf("\n"); 6844 } 6845 6846 ahc_platform_dump_card_state(ahc); 6847 printf("\n<<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>\n"); 6848 ahc_outb(ahc, SCBPTR, saved_scbptr); 6849 if (paused == 0) 6850 ahc_unpause(ahc); 6851 } 6852 6853 /*************************** Timeout Handling *********************************/ 6854 void 6855 ahc_timeout(struct scb *scb) 6856 { 6857 struct ahc_softc *ahc; 6858 6859 ahc = scb->ahc_softc; 6860 if ((scb->flags & SCB_ACTIVE) != 0) { 6861 if ((scb->flags & SCB_TIMEDOUT) == 0) { 6862 LIST_INSERT_HEAD(&ahc->timedout_scbs, scb, 6863 timedout_links); 6864 scb->flags |= SCB_TIMEDOUT; 6865 } 6866 ahc_wakeup_recovery_thread(ahc); 6867 } 6868 } 6869 6870 /* 6871 * Re-schedule a timeout for the passed in SCB if we determine that some 6872 * other SCB is in the process of recovery or an SCB with a longer 6873 * timeout is still pending. Limit our search to just "other_scb" 6874 * if it is non-NULL. 6875 */ 6876 static int 6877 ahc_other_scb_timeout(struct ahc_softc *ahc, struct scb *scb, 6878 struct scb *other_scb) 6879 { 6880 u_int newtimeout; 6881 int found; 6882 6883 ahc_print_path(ahc, scb); 6884 printf("Other SCB Timeout%s", 6885 (scb->flags & SCB_OTHERTCL_TIMEOUT) != 0 6886 ? " again\n" : "\n"); 6887 6888 newtimeout = aic_get_timeout(scb); 6889 scb->flags |= SCB_OTHERTCL_TIMEOUT; 6890 found = 0; 6891 if (other_scb != NULL) { 6892 if ((other_scb->flags 6893 & (SCB_OTHERTCL_TIMEOUT|SCB_TIMEDOUT)) == 0 6894 || (other_scb->flags & SCB_RECOVERY_SCB) != 0) { 6895 found++; 6896 newtimeout = MAX(aic_get_timeout(other_scb), 6897 newtimeout); 6898 } 6899 } else { 6900 LIST_FOREACH(other_scb, &ahc->pending_scbs, pending_links) { 6901 if ((other_scb->flags 6902 & (SCB_OTHERTCL_TIMEOUT|SCB_TIMEDOUT)) == 0 6903 || (other_scb->flags & SCB_RECOVERY_SCB) != 0) { 6904 found++; 6905 newtimeout = 6906 MAX(aic_get_timeout(other_scb), 6907 newtimeout); 6908 } 6909 } 6910 } 6911 6912 if (found != 0) 6913 aic_scb_timer_reset(scb, newtimeout); 6914 else { 6915 ahc_print_path(ahc, scb); 6916 printf("No other SCB worth waiting for...\n"); 6917 } 6918 6919 return (found != 0); 6920 } 6921 6922 /* 6923 * ahc_recover_commands determines if any of the commands that have currently 6924 * timedout are the root cause for this timeout. Innocent commands are given 6925 * a new timeout while we wait for the command executing on the bus to timeout. 6926 * This routine is invoked from a thread context so we are allowed to sleep. 6927 * Our lock is not held on entry. 6928 */ 6929 void 6930 ahc_recover_commands(struct ahc_softc *ahc) 6931 { 6932 struct scb *scb; 6933 int found; 6934 int restart_needed; 6935 u_int last_phase; 6936 6937 /* 6938 * Pause the controller and manually flush any 6939 * commands that have just completed but that our 6940 * interrupt handler has yet to see. 6941 */ 6942 ahc_pause_and_flushwork(ahc); 6943 6944 if (LIST_EMPTY(&ahc->timedout_scbs) != 0) { 6945 /* 6946 * The timedout commands have already 6947 * completed. This typically means 6948 * that either the timeout value was on 6949 * the hairy edge of what the device 6950 * requires or - more likely - interrupts 6951 * are not happening. 6952 */ 6953 printf("%s: Timedout SCBs already complete. " 6954 "Interrupts may not be functioning.\n", ahc_name(ahc)); 6955 ahc_unpause(ahc); 6956 return; 6957 } 6958 6959 restart_needed = 0; 6960 printf("%s: Recovery Initiated\n", ahc_name(ahc)); 6961 ahc_dump_card_state(ahc); 6962 6963 last_phase = ahc_inb(ahc, LASTPHASE); 6964 while ((scb = LIST_FIRST(&ahc->timedout_scbs)) != NULL) { 6965 u_int active_scb_index; 6966 u_int saved_scbptr; 6967 int target; 6968 int lun; 6969 int i; 6970 char channel; 6971 6972 target = SCB_GET_TARGET(ahc, scb); 6973 channel = SCB_GET_CHANNEL(ahc, scb); 6974 lun = SCB_GET_LUN(scb); 6975 6976 ahc_print_path(ahc, scb); 6977 printf("SCB 0x%x - timed out\n", scb->hscb->tag); 6978 if (scb->sg_count > 0) { 6979 for (i = 0; i < scb->sg_count; i++) { 6980 printf("sg[%d] - Addr 0x%x : Length %d\n", 6981 i, 6982 scb->sg_list[i].addr, 6983 scb->sg_list[i].len & AHC_SG_LEN_MASK); 6984 } 6985 } 6986 if (scb->flags & (SCB_DEVICE_RESET|SCB_ABORT)) { 6987 /* 6988 * Been down this road before. 6989 * Do a full bus reset. 6990 */ 6991 aic_set_transaction_status(scb, CAM_CMD_TIMEOUT); 6992 bus_reset: 6993 found = ahc_reset_channel(ahc, channel, 6994 /*Initiate Reset*/TRUE); 6995 printf("%s: Issued Channel %c Bus Reset. " 6996 "%d SCBs aborted\n", ahc_name(ahc), channel, 6997 found); 6998 continue; 6999 } 7000 7001 /* 7002 * Remove the command from the timedout list in 7003 * preparation for requeing it. 7004 */ 7005 LIST_REMOVE(scb, timedout_links); 7006 scb->flags &= ~SCB_TIMEDOUT; 7007 7008 /* 7009 * If we are a target, transition to bus free and report 7010 * the timeout. 7011 * 7012 * The target/initiator that is holding up the bus may not 7013 * be the same as the one that triggered this timeout 7014 * (different commands have different timeout lengths). 7015 * If the bus is idle and we are actiing as the initiator 7016 * for this request, queue a BDR message to the timed out 7017 * target. Otherwise, if the timed out transaction is 7018 * active: 7019 * Initiator transaction: 7020 * Stuff the message buffer with a BDR message and assert 7021 * ATN in the hopes that the target will let go of the bus 7022 * and go to the mesgout phase. If this fails, we'll 7023 * get another timeout 2 seconds later which will attempt 7024 * a bus reset. 7025 * 7026 * Target transaction: 7027 * Transition to BUS FREE and report the error. 7028 * It's good to be the target! 7029 */ 7030 saved_scbptr = ahc_inb(ahc, SCBPTR); 7031 active_scb_index = ahc_inb(ahc, SCB_TAG); 7032 7033 if ((ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0 7034 && (active_scb_index < ahc->scb_data->numscbs)) { 7035 struct scb *active_scb; 7036 7037 /* 7038 * If the active SCB is not us, assume that 7039 * the active SCB has a longer timeout than 7040 * the timedout SCB, and wait for the active 7041 * SCB to timeout. 7042 */ 7043 active_scb = ahc_lookup_scb(ahc, active_scb_index); 7044 if (active_scb != scb) { 7045 if (ahc_other_scb_timeout(ahc, scb, 7046 active_scb) == 0) 7047 goto bus_reset; 7048 continue; 7049 } 7050 7051 /* It's us */ 7052 if ((scb->flags & SCB_TARGET_SCB) != 0) { 7053 /* 7054 * Send back any queued up transactions 7055 * and properly record the error condition. 7056 */ 7057 ahc_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 7058 SCB_GET_CHANNEL(ahc, scb), 7059 SCB_GET_LUN(scb), 7060 scb->hscb->tag, 7061 ROLE_TARGET, 7062 CAM_CMD_TIMEOUT); 7063 7064 /* Will clear us from the bus */ 7065 restart_needed = 1; 7066 break; 7067 } 7068 7069 ahc_set_recoveryscb(ahc, active_scb); 7070 ahc_outb(ahc, MSG_OUT, HOST_MSG); 7071 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 7072 ahc_print_path(ahc, active_scb); 7073 printf("BDR message in message buffer\n"); 7074 active_scb->flags |= SCB_DEVICE_RESET; 7075 aic_scb_timer_reset(scb, 2 * 1000); 7076 } else if (last_phase != P_BUSFREE 7077 && (ahc_inb(ahc, SSTAT1) & REQINIT) == 0) { 7078 /* 7079 * SCB is not identified, there 7080 * is no pending REQ, and the sequencer 7081 * has not seen a busfree. Looks like 7082 * a stuck connection waiting to 7083 * go busfree. Reset the bus. 7084 */ 7085 printf("%s: Connection stuck awaiting busfree or " 7086 "Identify Msg.\n", ahc_name(ahc)); 7087 goto bus_reset; 7088 } else { 7089 int disconnected; 7090 7091 if (last_phase != P_BUSFREE 7092 && (ahc_inb(ahc, SSTAT0) & TARGET) != 0) { 7093 /* Hung target selection. Goto busfree */ 7094 printf("%s: Hung target selection\n", 7095 ahc_name(ahc)); 7096 restart_needed = 1; 7097 break; 7098 } 7099 7100 /* XXX Shouldn't panic. Just punt instead? */ 7101 if ((scb->flags & SCB_TARGET_SCB) != 0) 7102 panic("Timed-out target SCB but bus idle"); 7103 7104 if (ahc_search_qinfifo(ahc, target, channel, lun, 7105 scb->hscb->tag, ROLE_INITIATOR, 7106 /*status*/0, SEARCH_COUNT) > 0) { 7107 disconnected = FALSE; 7108 } else { 7109 disconnected = TRUE; 7110 } 7111 7112 if (disconnected) { 7113 ahc_set_recoveryscb(ahc, scb); 7114 /* 7115 * Actually re-queue this SCB in an attempt 7116 * to select the device before it reconnects. 7117 * In either case (selection or reselection), 7118 * we will now issue a target reset to the 7119 * timed-out device. 7120 * 7121 * Set the MK_MESSAGE control bit indicating 7122 * that we desire to send a message. We 7123 * also set the disconnected flag since 7124 * in the paging case there is no guarantee 7125 * that our SCB control byte matches the 7126 * version on the card. We don't want the 7127 * sequencer to abort the command thinking 7128 * an unsolicited reselection occurred. 7129 */ 7130 scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 7131 scb->flags |= SCB_DEVICE_RESET; 7132 7133 /* 7134 * Remove any cached copy of this SCB in the 7135 * disconnected list in preparation for the 7136 * queuing of our abort SCB. We use the 7137 * same element in the SCB, SCB_NEXT, for 7138 * both the qinfifo and the disconnected list. 7139 */ 7140 ahc_search_disc_list(ahc, target, channel, 7141 lun, scb->hscb->tag, 7142 /*stop_on_first*/TRUE, 7143 /*remove*/TRUE, 7144 /*save_state*/FALSE); 7145 7146 /* 7147 * In the non-paging case, the sequencer will 7148 * never re-reference the in-core SCB. 7149 * To make sure we are notified during 7150 * reselection, set the MK_MESSAGE flag in 7151 * the card's copy of the SCB. 7152 */ 7153 if ((ahc->flags & AHC_PAGESCBS) == 0) { 7154 ahc_outb(ahc, SCBPTR, scb->hscb->tag); 7155 ahc_outb(ahc, SCB_CONTROL, 7156 ahc_inb(ahc, SCB_CONTROL) 7157 | MK_MESSAGE); 7158 } 7159 7160 /* 7161 * Clear out any entries in the QINFIFO first 7162 * so we are the next SCB for this target 7163 * to run. 7164 */ 7165 ahc_search_qinfifo(ahc, 7166 SCB_GET_TARGET(ahc, scb), 7167 channel, SCB_GET_LUN(scb), 7168 SCB_LIST_NULL, 7169 ROLE_INITIATOR, 7170 CAM_REQUEUE_REQ, 7171 SEARCH_COMPLETE); 7172 ahc_print_path(ahc, scb); 7173 printf("Queuing a BDR SCB\n"); 7174 ahc_qinfifo_requeue_tail(ahc, scb); 7175 ahc_outb(ahc, SCBPTR, saved_scbptr); 7176 aic_scb_timer_reset(scb, 2 * 1000); 7177 } else { 7178 /* Go "immediately" to the bus reset */ 7179 /* This shouldn't happen */ 7180 ahc_set_recoveryscb(ahc, scb); 7181 ahc_print_path(ahc, scb); 7182 printf("SCB %d: Immediate reset. " 7183 "Flags = 0x%x\n", scb->hscb->tag, 7184 scb->flags); 7185 goto bus_reset; 7186 } 7187 } 7188 break; 7189 } 7190 7191 /* 7192 * Any remaining SCBs were not the "culprit", so remove 7193 * them from the timeout list. The timer for these commands 7194 * will be reset once the recovery SCB completes. 7195 */ 7196 while ((scb = LIST_FIRST(&ahc->timedout_scbs)) != NULL) { 7197 LIST_REMOVE(scb, timedout_links); 7198 scb->flags &= ~SCB_TIMEDOUT; 7199 } 7200 7201 if (restart_needed) 7202 ahc_restart(ahc); 7203 else 7204 ahc_unpause(ahc); 7205 } 7206 7207 /************************* Target Mode ****************************************/ 7208 #ifdef AHC_TARGET_MODE 7209 cam_status 7210 ahc_find_tmode_devs(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb, 7211 struct ahc_tmode_tstate **tstate, 7212 struct ahc_tmode_lstate **lstate, 7213 int notfound_failure) 7214 { 7215 7216 if ((ahc->features & AHC_TARGETMODE) == 0) 7217 return (CAM_REQ_INVALID); 7218 7219 /* 7220 * Handle the 'black hole' device that sucks up 7221 * requests to unattached luns on enabled targets. 7222 */ 7223 if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD 7224 && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) { 7225 *tstate = NULL; 7226 *lstate = ahc->black_hole; 7227 } else { 7228 u_int max_id; 7229 7230 max_id = (ahc->features & AHC_WIDE) ? 15 : 7; 7231 if (ccb->ccb_h.target_id > max_id) 7232 return (CAM_TID_INVALID); 7233 7234 if (ccb->ccb_h.target_lun >= AHC_NUM_LUNS) 7235 return (CAM_LUN_INVALID); 7236 7237 *tstate = ahc->enabled_targets[ccb->ccb_h.target_id]; 7238 *lstate = NULL; 7239 if (*tstate != NULL) 7240 *lstate = 7241 (*tstate)->enabled_luns[ccb->ccb_h.target_lun]; 7242 } 7243 7244 if (notfound_failure != 0 && *lstate == NULL) 7245 return (CAM_PATH_INVALID); 7246 7247 return (CAM_REQ_CMP); 7248 } 7249 7250 void 7251 ahc_handle_en_lun(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb) 7252 { 7253 struct ahc_tmode_tstate *tstate; 7254 struct ahc_tmode_lstate *lstate; 7255 struct ccb_en_lun *cel; 7256 union ccb *cancel_ccb; 7257 cam_status status; 7258 u_int target; 7259 u_int lun; 7260 u_int target_mask; 7261 u_int our_id; 7262 int error; 7263 char channel; 7264 7265 status = ahc_find_tmode_devs(ahc, sim, ccb, &tstate, &lstate, 7266 /*notfound_failure*/FALSE); 7267 7268 if (status != CAM_REQ_CMP) { 7269 ccb->ccb_h.status = status; 7270 return; 7271 } 7272 7273 if (cam_sim_bus(sim) == 0) 7274 our_id = ahc->our_id; 7275 else 7276 our_id = ahc->our_id_b; 7277 7278 if (ccb->ccb_h.target_id != our_id 7279 && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) { 7280 /* 7281 * our_id represents our initiator ID, or 7282 * the ID of the first target to have an 7283 * enabled lun in target mode. There are 7284 * two cases that may preclude enabling a 7285 * target id other than our_id. 7286 * 7287 * o our_id is for an active initiator role. 7288 * Since the hardware does not support 7289 * reselections to the initiator role at 7290 * anything other than our_id, and our_id 7291 * is used by the hardware to indicate the 7292 * ID to use for both select-out and 7293 * reselect-out operations, the only target 7294 * ID we can support in this mode is our_id. 7295 * 7296 * o The MULTARGID feature is not available and 7297 * a previous target mode ID has been enabled. 7298 */ 7299 if ((ahc->features & AHC_MULTIROLE) != 0) { 7300 if ((ahc->features & AHC_MULTI_TID) != 0 7301 && (ahc->flags & AHC_INITIATORROLE) != 0) { 7302 /* 7303 * Only allow additional targets if 7304 * the initiator role is disabled. 7305 * The hardware cannot handle a re-select-in 7306 * on the initiator id during a re-select-out 7307 * on a different target id. 7308 */ 7309 status = CAM_TID_INVALID; 7310 } else if ((ahc->flags & AHC_INITIATORROLE) != 0 7311 || ahc->enabled_luns > 0) { 7312 /* 7313 * Only allow our target id to change 7314 * if the initiator role is not configured 7315 * and there are no enabled luns which 7316 * are attached to the currently registered 7317 * scsi id. 7318 */ 7319 status = CAM_TID_INVALID; 7320 } 7321 } else if ((ahc->features & AHC_MULTI_TID) == 0 7322 && ahc->enabled_luns > 0) { 7323 status = CAM_TID_INVALID; 7324 } 7325 } 7326 7327 if (status != CAM_REQ_CMP) { 7328 ccb->ccb_h.status = status; 7329 return; 7330 } 7331 7332 /* 7333 * We now have an id that is valid. 7334 * If we aren't in target mode, switch modes. 7335 */ 7336 if ((ahc->flags & AHC_TARGETROLE) == 0 7337 && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) { 7338 ahc_flag saved_flags; 7339 7340 printf("Configuring Target Mode\n"); 7341 if (LIST_FIRST(&ahc->pending_scbs) != NULL) { 7342 ccb->ccb_h.status = CAM_BUSY; 7343 return; 7344 } 7345 saved_flags = ahc->flags; 7346 ahc->flags |= AHC_TARGETROLE; 7347 if ((ahc->features & AHC_MULTIROLE) == 0) 7348 ahc->flags &= ~AHC_INITIATORROLE; 7349 ahc_pause(ahc); 7350 error = ahc_loadseq(ahc); 7351 if (error != 0) { 7352 /* 7353 * Restore original configuration and notify 7354 * the caller that we cannot support target mode. 7355 * Since the adapter started out in this 7356 * configuration, the firmware load will succeed, 7357 * so there is no point in checking ahc_loadseq's 7358 * return value. 7359 */ 7360 ahc->flags = saved_flags; 7361 (void)ahc_loadseq(ahc); 7362 ahc_restart(ahc); 7363 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 7364 return; 7365 } 7366 ahc_restart(ahc); 7367 } 7368 cel = &ccb->cel; 7369 target = ccb->ccb_h.target_id; 7370 lun = ccb->ccb_h.target_lun; 7371 channel = SIM_CHANNEL(ahc, sim); 7372 target_mask = 0x01 << target; 7373 if (channel == 'B') 7374 target_mask <<= 8; 7375 7376 if (cel->enable != 0) { 7377 u_int scsiseq; 7378 7379 /* Are we already enabled?? */ 7380 if (lstate != NULL) { 7381 xpt_print_path(ccb->ccb_h.path); 7382 printf("Lun already enabled\n"); 7383 ccb->ccb_h.status = CAM_LUN_ALRDY_ENA; 7384 return; 7385 } 7386 7387 if (cel->grp6_len != 0 7388 || cel->grp7_len != 0) { 7389 /* 7390 * Don't (yet?) support vendor 7391 * specific commands. 7392 */ 7393 ccb->ccb_h.status = CAM_REQ_INVALID; 7394 printf("Non-zero Group Codes\n"); 7395 return; 7396 } 7397 7398 /* 7399 * Seems to be okay. 7400 * Setup our data structures. 7401 */ 7402 if (target != CAM_TARGET_WILDCARD && tstate == NULL) { 7403 tstate = ahc_alloc_tstate(ahc, target, channel); 7404 if (tstate == NULL) { 7405 xpt_print_path(ccb->ccb_h.path); 7406 printf("Couldn't allocate tstate\n"); 7407 ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 7408 return; 7409 } 7410 } 7411 lstate = malloc(sizeof(*lstate), M_DEVBUF, M_NOWAIT); 7412 if (lstate == NULL) { 7413 xpt_print_path(ccb->ccb_h.path); 7414 printf("Couldn't allocate lstate\n"); 7415 ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 7416 return; 7417 } 7418 memset(lstate, 0, sizeof(*lstate)); 7419 status = xpt_create_path(&lstate->path, /*periph*/NULL, 7420 xpt_path_path_id(ccb->ccb_h.path), 7421 xpt_path_target_id(ccb->ccb_h.path), 7422 xpt_path_lun_id(ccb->ccb_h.path)); 7423 if (status != CAM_REQ_CMP) { 7424 free(lstate, M_DEVBUF); 7425 xpt_print_path(ccb->ccb_h.path); 7426 printf("Couldn't allocate path\n"); 7427 ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 7428 return; 7429 } 7430 SLIST_INIT(&lstate->accept_tios); 7431 SLIST_INIT(&lstate->immed_notifies); 7432 ahc_pause(ahc); 7433 if (target != CAM_TARGET_WILDCARD) { 7434 tstate->enabled_luns[lun] = lstate; 7435 ahc->enabled_luns++; 7436 7437 if ((ahc->features & AHC_MULTI_TID) != 0) { 7438 u_int targid_mask; 7439 7440 targid_mask = ahc_inb(ahc, TARGID) 7441 | (ahc_inb(ahc, TARGID + 1) << 8); 7442 7443 targid_mask |= target_mask; 7444 ahc_outb(ahc, TARGID, targid_mask); 7445 ahc_outb(ahc, TARGID+1, (targid_mask >> 8)); 7446 7447 ahc_update_scsiid(ahc, targid_mask); 7448 } else { 7449 u_int our_id; 7450 char channel; 7451 7452 channel = SIM_CHANNEL(ahc, sim); 7453 our_id = SIM_SCSI_ID(ahc, sim); 7454 7455 /* 7456 * This can only happen if selections 7457 * are not enabled 7458 */ 7459 if (target != our_id) { 7460 u_int sblkctl; 7461 char cur_channel; 7462 int swap; 7463 7464 sblkctl = ahc_inb(ahc, SBLKCTL); 7465 cur_channel = (sblkctl & SELBUSB) 7466 ? 'B' : 'A'; 7467 if ((ahc->features & AHC_TWIN) == 0) 7468 cur_channel = 'A'; 7469 swap = cur_channel != channel; 7470 if (channel == 'A') 7471 ahc->our_id = target; 7472 else 7473 ahc->our_id_b = target; 7474 7475 if (swap) 7476 ahc_outb(ahc, SBLKCTL, 7477 sblkctl ^ SELBUSB); 7478 7479 ahc_outb(ahc, SCSIID, target); 7480 7481 if (swap) 7482 ahc_outb(ahc, SBLKCTL, sblkctl); 7483 } 7484 } 7485 } else 7486 ahc->black_hole = lstate; 7487 /* Allow select-in operations */ 7488 if (ahc->black_hole != NULL && ahc->enabled_luns > 0) { 7489 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); 7490 scsiseq |= ENSELI; 7491 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq); 7492 scsiseq = ahc_inb(ahc, SCSISEQ); 7493 scsiseq |= ENSELI; 7494 ahc_outb(ahc, SCSISEQ, scsiseq); 7495 } 7496 ahc_unpause(ahc); 7497 ccb->ccb_h.status = CAM_REQ_CMP; 7498 xpt_print_path(ccb->ccb_h.path); 7499 printf("Lun now enabled for target mode\n"); 7500 } else { 7501 struct scb *scb; 7502 int i, empty; 7503 7504 if (lstate == NULL) { 7505 ccb->ccb_h.status = CAM_LUN_INVALID; 7506 return; 7507 } 7508 7509 ccb->ccb_h.status = CAM_REQ_CMP; 7510 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { 7511 struct ccb_hdr *ccbh; 7512 7513 ccbh = &scb->io_ctx->ccb_h; 7514 if (ccbh->func_code == XPT_CONT_TARGET_IO 7515 && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){ 7516 printf("CTIO pending\n"); 7517 ccb->ccb_h.status = CAM_REQ_INVALID; 7518 return; 7519 } 7520 } 7521 7522 if (SLIST_FIRST(&lstate->accept_tios) != NULL) { 7523 printf("ATIOs pending\n"); 7524 while ((cancel_ccb = (union ccb *)SLIST_FIRST(&lstate->accept_tios)) != NULL) { 7525 SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle); 7526 cancel_ccb->ccb_h.status = CAM_REQ_ABORTED; 7527 xpt_done(cancel_ccb); 7528 }; 7529 } 7530 7531 if (SLIST_FIRST(&lstate->immed_notifies) != NULL) { 7532 printf("INOTs pending\n"); 7533 while ((cancel_ccb = (union ccb *)SLIST_FIRST(&lstate->immed_notifies)) != NULL) { 7534 SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle); 7535 cancel_ccb->ccb_h.status = CAM_REQ_ABORTED; 7536 xpt_done(cancel_ccb); 7537 }; 7538 } 7539 7540 if (ccb->ccb_h.status != CAM_REQ_CMP) { 7541 return; 7542 } 7543 7544 xpt_print_path(ccb->ccb_h.path); 7545 printf("Target mode disabled\n"); 7546 xpt_free_path(lstate->path); 7547 free(lstate, M_DEVBUF); 7548 7549 ahc_pause(ahc); 7550 /* Can we clean up the target too? */ 7551 if (target != CAM_TARGET_WILDCARD) { 7552 tstate->enabled_luns[lun] = NULL; 7553 ahc->enabled_luns--; 7554 for (empty = 1, i = 0; i < 8; i++) 7555 if (tstate->enabled_luns[i] != NULL) { 7556 empty = 0; 7557 break; 7558 } 7559 7560 if (empty) { 7561 ahc_free_tstate(ahc, target, channel, 7562 /*force*/FALSE); 7563 if (ahc->features & AHC_MULTI_TID) { 7564 u_int targid_mask; 7565 7566 targid_mask = ahc_inb(ahc, TARGID) 7567 | (ahc_inb(ahc, TARGID + 1) 7568 << 8); 7569 7570 targid_mask &= ~target_mask; 7571 ahc_outb(ahc, TARGID, targid_mask); 7572 ahc_outb(ahc, TARGID+1, 7573 (targid_mask >> 8)); 7574 ahc_update_scsiid(ahc, targid_mask); 7575 } 7576 } 7577 } else { 7578 ahc->black_hole = NULL; 7579 7580 /* 7581 * We can't allow selections without 7582 * our black hole device. 7583 */ 7584 empty = TRUE; 7585 } 7586 if (ahc->enabled_luns == 0) { 7587 /* Disallow select-in */ 7588 u_int scsiseq; 7589 7590 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); 7591 scsiseq &= ~ENSELI; 7592 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq); 7593 scsiseq = ahc_inb(ahc, SCSISEQ); 7594 scsiseq &= ~ENSELI; 7595 ahc_outb(ahc, SCSISEQ, scsiseq); 7596 7597 if ((ahc->features & AHC_MULTIROLE) == 0) { 7598 printf("Configuring Initiator Mode\n"); 7599 ahc->flags &= ~AHC_TARGETROLE; 7600 ahc->flags |= AHC_INITIATORROLE; 7601 /* 7602 * Returning to a configuration that 7603 * fit previously will always succeed. 7604 */ 7605 (void)ahc_loadseq(ahc); 7606 ahc_restart(ahc); 7607 /* 7608 * Unpaused. The extra unpause 7609 * that follows is harmless. 7610 */ 7611 } 7612 } 7613 ahc_unpause(ahc); 7614 } 7615 } 7616 7617 static void 7618 ahc_update_scsiid(struct ahc_softc *ahc, u_int targid_mask) 7619 { 7620 u_int scsiid_mask; 7621 u_int scsiid; 7622 7623 if ((ahc->features & AHC_MULTI_TID) == 0) 7624 panic("ahc_update_scsiid called on non-multitid unit\n"); 7625 7626 /* 7627 * Since we will rely on the TARGID mask 7628 * for selection enables, ensure that OID 7629 * in SCSIID is not set to some other ID 7630 * that we don't want to allow selections on. 7631 */ 7632 if ((ahc->features & AHC_ULTRA2) != 0) 7633 scsiid = ahc_inb(ahc, SCSIID_ULTRA2); 7634 else 7635 scsiid = ahc_inb(ahc, SCSIID); 7636 scsiid_mask = 0x1 << (scsiid & OID); 7637 if ((targid_mask & scsiid_mask) == 0) { 7638 u_int our_id; 7639 7640 /* ffs counts from 1 */ 7641 our_id = ffs(targid_mask); 7642 if (our_id == 0) 7643 our_id = ahc->our_id; 7644 else 7645 our_id--; 7646 scsiid &= TID; 7647 scsiid |= our_id; 7648 } 7649 if ((ahc->features & AHC_ULTRA2) != 0) 7650 ahc_outb(ahc, SCSIID_ULTRA2, scsiid); 7651 else 7652 ahc_outb(ahc, SCSIID, scsiid); 7653 } 7654 7655 void 7656 ahc_run_tqinfifo(struct ahc_softc *ahc, int paused) 7657 { 7658 struct target_cmd *cmd; 7659 7660 /* 7661 * If the card supports auto-access pause, 7662 * we can access the card directly regardless 7663 * of whether it is paused or not. 7664 */ 7665 if ((ahc->features & AHC_AUTOPAUSE) != 0) 7666 paused = TRUE; 7667 7668 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_POSTREAD); 7669 while ((cmd = &ahc->targetcmds[ahc->tqinfifonext])->cmd_valid != 0) { 7670 /* 7671 * Only advance through the queue if we 7672 * have the resources to process the command. 7673 */ 7674 if (ahc_handle_target_cmd(ahc, cmd) != 0) 7675 break; 7676 7677 cmd->cmd_valid = 0; 7678 aic_dmamap_sync(ahc, ahc->shared_data_dmat, 7679 ahc->shared_data_dmamap, 7680 ahc_targetcmd_offset(ahc, ahc->tqinfifonext), 7681 sizeof(struct target_cmd), 7682 BUS_DMASYNC_PREREAD); 7683 ahc->tqinfifonext++; 7684 7685 /* 7686 * Lazily update our position in the target mode incoming 7687 * command queue as seen by the sequencer. 7688 */ 7689 if ((ahc->tqinfifonext & (HOST_TQINPOS - 1)) == 1) { 7690 if ((ahc->features & AHC_HS_MAILBOX) != 0) { 7691 u_int hs_mailbox; 7692 7693 hs_mailbox = ahc_inb(ahc, HS_MAILBOX); 7694 hs_mailbox &= ~HOST_TQINPOS; 7695 hs_mailbox |= ahc->tqinfifonext & HOST_TQINPOS; 7696 ahc_outb(ahc, HS_MAILBOX, hs_mailbox); 7697 } else { 7698 if (!paused) 7699 ahc_pause(ahc); 7700 ahc_outb(ahc, KERNEL_TQINPOS, 7701 ahc->tqinfifonext & HOST_TQINPOS); 7702 if (!paused) 7703 ahc_unpause(ahc); 7704 } 7705 } 7706 } 7707 } 7708 7709 static int 7710 ahc_handle_target_cmd(struct ahc_softc *ahc, struct target_cmd *cmd) 7711 { 7712 struct ahc_tmode_tstate *tstate; 7713 struct ahc_tmode_lstate *lstate; 7714 struct ccb_accept_tio *atio; 7715 uint8_t *byte; 7716 int initiator; 7717 int target; 7718 int lun; 7719 7720 initiator = SCSIID_TARGET(ahc, cmd->scsiid); 7721 target = SCSIID_OUR_ID(cmd->scsiid); 7722 lun = (cmd->identify & MSG_IDENTIFY_LUNMASK); 7723 7724 byte = cmd->bytes; 7725 tstate = ahc->enabled_targets[target]; 7726 lstate = NULL; 7727 if (tstate != NULL) 7728 lstate = tstate->enabled_luns[lun]; 7729 7730 /* 7731 * Commands for disabled luns go to the black hole driver. 7732 */ 7733 if (lstate == NULL) 7734 lstate = ahc->black_hole; 7735 7736 atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios); 7737 if (atio == NULL) { 7738 ahc->flags |= AHC_TQINFIFO_BLOCKED; 7739 /* 7740 * Wait for more ATIOs from the peripheral driver for this lun. 7741 */ 7742 if (bootverbose) 7743 printf("%s: ATIOs exhausted\n", ahc_name(ahc)); 7744 return (1); 7745 } else 7746 ahc->flags &= ~AHC_TQINFIFO_BLOCKED; 7747 #ifdef AHC_DEBUG 7748 if (ahc_debug & AHC_SHOW_TQIN) { 7749 printf("Incoming command from %d for %d:%d%s\n", 7750 initiator, target, lun, 7751 lstate == ahc->black_hole ? "(Black Holed)" : ""); 7752 } 7753 #endif 7754 SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle); 7755 7756 if (lstate == ahc->black_hole) { 7757 /* Fill in the wildcards */ 7758 atio->ccb_h.target_id = target; 7759 atio->ccb_h.target_lun = lun; 7760 } 7761 7762 /* 7763 * Package it up and send it off to 7764 * whomever has this lun enabled. 7765 */ 7766 atio->sense_len = 0; 7767 atio->init_id = initiator; 7768 if (byte[0] != 0xFF) { 7769 /* Tag was included */ 7770 atio->tag_action = *byte++; 7771 atio->tag_id = *byte++; 7772 atio->ccb_h.flags |= CAM_TAG_ACTION_VALID; 7773 } else { 7774 atio->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 7775 } 7776 byte++; 7777 7778 /* Okay. Now determine the cdb size based on the command code */ 7779 switch (*byte >> CMD_GROUP_CODE_SHIFT) { 7780 case 0: 7781 atio->cdb_len = 6; 7782 break; 7783 case 1: 7784 case 2: 7785 atio->cdb_len = 10; 7786 break; 7787 case 4: 7788 atio->cdb_len = 16; 7789 break; 7790 case 5: 7791 atio->cdb_len = 12; 7792 break; 7793 case 3: 7794 default: 7795 /* Only copy the opcode. */ 7796 atio->cdb_len = 1; 7797 printf("Reserved or VU command code type encountered\n"); 7798 break; 7799 } 7800 7801 memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len); 7802 7803 atio->ccb_h.status |= CAM_CDB_RECVD; 7804 7805 if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) { 7806 /* 7807 * We weren't allowed to disconnect. 7808 * We're hanging on the bus until a 7809 * continue target I/O comes in response 7810 * to this accept tio. 7811 */ 7812 #ifdef AHC_DEBUG 7813 if (ahc_debug & AHC_SHOW_TQIN) { 7814 printf("Received Immediate Command %d:%d:%d - %p\n", 7815 initiator, target, lun, ahc->pending_device); 7816 } 7817 #endif 7818 ahc->pending_device = lstate; 7819 aic_freeze_ccb((union ccb *)atio); 7820 atio->ccb_h.flags |= CAM_DIS_DISCONNECT; 7821 } else { 7822 atio->ccb_h.flags &= ~CAM_DIS_DISCONNECT; 7823 } 7824 7825 xpt_done((union ccb*)atio); 7826 return (0); 7827 } 7828 7829 #endif 7830