aic7xxx.c revision 1.122
1 /* $NetBSD: aic7xxx.c,v 1.122 2006/10/12 01:30:58 christos Exp $ */ 2 3 /* 4 * Core routines and tables shareable across OS platforms. 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: aic7xxx.c,v 1.122 2006/10/12 01:30:58 christos Exp $ 43 * 44 * //depot/aic7xxx/aic7xxx/aic7xxx.c#112 $ 45 * 46 * $FreeBSD: /repoman/r/ncvs/src/sys/dev/aic7xxx/aic7xxx.c,v 1.88 2003/01/20 20:44:55 gibbs Exp $ 47 */ 48 /* 49 * Ported from FreeBSD by Pascal Renauld, Network Storage Solutions, Inc. - April 2003 50 */ 51 52 #include <sys/cdefs.h> 53 __KERNEL_RCSID(0, "$NetBSD: aic7xxx.c,v 1.122 2006/10/12 01:30:58 christos Exp $"); 54 55 #include <dev/ic/aic7xxx_osm.h> 56 #include <dev/ic/aic7xxx_inline.h> 57 #include <dev/ic/aic7xxx_cam.h> 58 59 /****************************** Softc Data ************************************/ 60 struct ahc_softc_tailq ahc_tailq = TAILQ_HEAD_INITIALIZER(ahc_tailq); 61 62 /***************************** Lookup Tables **********************************/ 63 const char *ahc_chip_names[] = 64 { 65 "NONE", 66 "aic7770", 67 "aic7850", 68 "aic7855", 69 "aic7859", 70 "aic7860", 71 "aic7870", 72 "aic7880", 73 "aic7895", 74 "aic7895C", 75 "aic7890/91", 76 "aic7896/97", 77 "aic7892", 78 "aic7899" 79 }; 80 81 /* 82 * Hardware error codes. 83 */ 84 struct ahc_hard_error_entry { 85 uint8_t errno; 86 const char *errmesg; 87 }; 88 89 static struct ahc_hard_error_entry ahc_hard_errors[] = { 90 { ILLHADDR, "Illegal Host Access" }, 91 { ILLSADDR, "Illegal Sequencer Address referrenced" }, 92 { ILLOPCODE, "Illegal Opcode in sequencer program" }, 93 { SQPARERR, "Sequencer Parity Error" }, 94 { DPARERR, "Data-path Parity Error" }, 95 { MPARERR, "Scratch or SCB Memory Parity Error" }, 96 { PCIERRSTAT, "PCI Error detected" }, 97 { CIOPARERR, "CIOBUS Parity Error" }, 98 }; 99 static const u_int num_errors = NUM_ELEMENTS(ahc_hard_errors); 100 101 static struct ahc_phase_table_entry ahc_phase_table[] = 102 { 103 { P_DATAOUT, MSG_NOOP, "in Data-out phase" }, 104 { P_DATAIN, MSG_INITIATOR_DET_ERR, "in Data-in phase" }, 105 { P_DATAOUT_DT, MSG_NOOP, "in DT Data-out phase" }, 106 { P_DATAIN_DT, MSG_INITIATOR_DET_ERR, "in DT Data-in phase" }, 107 { P_COMMAND, MSG_NOOP, "in Command phase" }, 108 { P_MESGOUT, MSG_NOOP, "in Message-out phase" }, 109 { P_STATUS, MSG_INITIATOR_DET_ERR, "in Status phase" }, 110 { P_MESGIN, MSG_PARITY_ERROR, "in Message-in phase" }, 111 { P_BUSFREE, MSG_NOOP, "while idle" }, 112 { 0, MSG_NOOP, "in unknown phase" } 113 }; 114 115 /* 116 * In most cases we only wish to itterate over real phases, so 117 * exclude the last element from the count. 118 */ 119 static const u_int num_phases = NUM_ELEMENTS(ahc_phase_table) - 1; 120 121 /* 122 * Valid SCSIRATE values. (p. 3-17) 123 * Provides a mapping of transfer periods in ns to the proper value to 124 * stick in the scsixfer reg. 125 */ 126 static struct ahc_syncrate ahc_syncrates[] = 127 { 128 /* ultra2 fast/ultra period rate */ 129 { 0x42, 0x000, 9, "80.0" }, 130 { 0x03, 0x000, 10, "40.0" }, 131 { 0x04, 0x000, 11, "33.0" }, 132 { 0x05, 0x100, 12, "20.0" }, 133 { 0x06, 0x110, 15, "16.0" }, 134 { 0x07, 0x120, 18, "13.4" }, 135 { 0x08, 0x000, 25, "10.0" }, 136 { 0x19, 0x010, 31, "8.0" }, 137 { 0x1a, 0x020, 37, "6.67" }, 138 { 0x1b, 0x030, 43, "5.7" }, 139 { 0x1c, 0x040, 50, "5.0" }, 140 { 0x00, 0x050, 56, "4.4" }, 141 { 0x00, 0x060, 62, "4.0" }, 142 { 0x00, 0x070, 68, "3.6" }, 143 { 0x00, 0x000, 0, NULL } 144 }; 145 146 /* Our Sequencer Program */ 147 #include <dev/microcode/aic7xxx/aic7xxx_seq.h> 148 149 /**************************** Function Declarations ***************************/ 150 static void ahc_force_renegotiation(struct ahc_softc *ahc); 151 static struct ahc_tmode_tstate* 152 ahc_alloc_tstate(struct ahc_softc *ahc, 153 u_int scsi_id, char channel); 154 #ifdef AHC_TARGET_MODE 155 static void ahc_free_tstate(struct ahc_softc *ahc, 156 u_int scsi_id, char channel, int force); 157 #endif 158 static struct ahc_syncrate* 159 ahc_devlimited_syncrate(struct ahc_softc *ahc, 160 struct ahc_initiator_tinfo *, 161 u_int *period, 162 u_int *ppr_options, 163 role_t role); 164 static void ahc_update_pending_scbs(struct ahc_softc *ahc); 165 static void ahc_fetch_devinfo(struct ahc_softc *ahc, 166 struct ahc_devinfo *devinfo); 167 static void ahc_scb_devinfo(struct ahc_softc *ahc, 168 struct ahc_devinfo *devinfo, 169 struct scb *scb); 170 static void ahc_assert_atn(struct ahc_softc *ahc); 171 static void ahc_setup_initiator_msgout(struct ahc_softc *ahc, 172 struct ahc_devinfo *devinfo, 173 struct scb *scb); 174 static void ahc_build_transfer_msg(struct ahc_softc *ahc, 175 struct ahc_devinfo *devinfo); 176 static void ahc_construct_sdtr(struct ahc_softc *ahc, 177 struct ahc_devinfo *devinfo, 178 u_int period, u_int offset); 179 static void ahc_construct_wdtr(struct ahc_softc *ahc, 180 struct ahc_devinfo *devinfo, 181 u_int bus_width); 182 static void ahc_construct_ppr(struct ahc_softc *ahc, 183 struct ahc_devinfo *devinfo, 184 u_int period, u_int offset, 185 u_int bus_width, u_int ppr_options); 186 static void ahc_clear_msg_state(struct ahc_softc *ahc); 187 static void ahc_handle_proto_violation(struct ahc_softc *ahc); 188 static void ahc_handle_message_phase(struct ahc_softc *ahc); 189 typedef enum { 190 AHCMSG_1B, 191 AHCMSG_2B, 192 AHCMSG_EXT 193 } ahc_msgtype; 194 static int ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, 195 u_int msgval, int full); 196 static int ahc_parse_msg(struct ahc_softc *ahc, 197 struct ahc_devinfo *devinfo); 198 static int ahc_handle_msg_reject(struct ahc_softc *ahc, 199 struct ahc_devinfo *devinfo); 200 static void ahc_handle_ign_wide_residue(struct ahc_softc *ahc, 201 struct ahc_devinfo *devinfo); 202 static void ahc_reinitialize_dataptrs(struct ahc_softc *ahc); 203 static void ahc_handle_devreset(struct ahc_softc *ahc, 204 struct ahc_devinfo *devinfo, 205 cam_status status, 206 const char *message, 207 int verbose_level); 208 #if AHC_TARGET_MODE 209 static void ahc_setup_target_msgin(struct ahc_softc *ahc, 210 struct ahc_devinfo *devinfo, 211 struct scb *scb); 212 #endif 213 214 //static bus_dmamap_callback_t ahc_dmamap_cb; 215 static void ahc_build_free_scb_list(struct ahc_softc *ahc); 216 static int ahc_init_scbdata(struct ahc_softc *ahc); 217 static void ahc_fini_scbdata(struct ahc_softc *ahc); 218 static void ahc_qinfifo_requeue(struct ahc_softc *ahc, 219 struct scb *prev_scb, 220 struct scb *scb); 221 static int ahc_qinfifo_count(struct ahc_softc *ahc); 222 static u_int ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, 223 u_int prev, u_int scbptr); 224 static void ahc_add_curscb_to_free_list(struct ahc_softc *ahc); 225 static u_int ahc_rem_wscb(struct ahc_softc *ahc, 226 u_int scbpos, u_int prev); 227 static void ahc_reset_current_bus(struct ahc_softc *ahc); 228 #ifdef AHC_DUMP_SEQ 229 static void ahc_dumpseq(struct ahc_softc *ahc); 230 #endif 231 static void ahc_loadseq(struct ahc_softc *ahc); 232 static int ahc_check_patch(struct ahc_softc *ahc, 233 struct patch **start_patch, 234 u_int start_instr, u_int *skip_addr); 235 static void ahc_download_instr(struct ahc_softc *ahc, 236 u_int instrptr, uint8_t *dconsts); 237 #ifdef AHC_TARGET_MODE 238 static void ahc_queue_lstate_event(struct ahc_softc *ahc, 239 struct ahc_tmode_lstate *lstate, 240 u_int initiator_id, 241 u_int event_type, 242 u_int event_arg); 243 static void ahc_update_scsiid(struct ahc_softc *ahc, 244 u_int targid_mask); 245 static int ahc_handle_target_cmd(struct ahc_softc *ahc, 246 struct target_cmd *cmd); 247 #endif 248 249 /************************** Added for porting to NetBSD ***********************/ 250 static int ahc_createdmamem(bus_dma_tag_t tag, 251 int size, 252 int flags, 253 bus_dmamap_t *mapp, 254 caddr_t *vaddr, 255 bus_addr_t *baddr, 256 bus_dma_segment_t *seg, 257 int *nseg, 258 const char *myname, const char *what); 259 static void ahc_freedmamem(bus_dma_tag_t tag, 260 int size, 261 bus_dmamap_t map, 262 caddr_t vaddr, 263 bus_dma_segment_t *seg, 264 int nseg); 265 266 /************************* Sequencer Execution Control ************************/ 267 /* 268 * Restart the sequencer program from address zero 269 */ 270 void 271 ahc_restart(struct ahc_softc *ahc) 272 { 273 274 ahc_pause(ahc); 275 276 /* No more pending messages. */ 277 ahc_clear_msg_state(ahc); 278 279 ahc_outb(ahc, SCSISIGO, 0); /* De-assert BSY */ 280 ahc_outb(ahc, MSG_OUT, MSG_NOOP); /* No message to send */ 281 ahc_outb(ahc, SXFRCTL1, ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET); 282 ahc_outb(ahc, LASTPHASE, P_BUSFREE); 283 ahc_outb(ahc, SAVED_SCSIID, 0xFF); 284 ahc_outb(ahc, SAVED_LUN, 0xFF); 285 286 /* 287 * Ensure that the sequencer's idea of TQINPOS 288 * matches our own. The sequencer increments TQINPOS 289 * only after it sees a DMA complete and a reset could 290 * occur before the increment leaving the kernel to believe 291 * the command arrived but the sequencer to not. 292 */ 293 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext); 294 295 /* Always allow reselection */ 296 ahc_outb(ahc, SCSISEQ, 297 ahc_inb(ahc, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP)); 298 if ((ahc->features & AHC_CMD_CHAN) != 0) { 299 /* Ensure that no DMA operations are in progress */ 300 ahc_outb(ahc, CCSCBCNT, 0); 301 ahc_outb(ahc, CCSGCTL, 0); 302 ahc_outb(ahc, CCSCBCTL, 0); 303 } 304 /* 305 * If we were in the process of DMA'ing SCB data into 306 * an SCB, replace that SCB on the free list. This prevents 307 * an SCB leak. 308 */ 309 if ((ahc_inb(ahc, SEQ_FLAGS2) & SCB_DMA) != 0) { 310 ahc_add_curscb_to_free_list(ahc); 311 ahc_outb(ahc, SEQ_FLAGS2, 312 ahc_inb(ahc, SEQ_FLAGS2) & ~SCB_DMA); 313 } 314 ahc_outb(ahc, MWI_RESIDUAL, 0); 315 ahc_outb(ahc, SEQCTL, FASTMODE); 316 ahc_outb(ahc, SEQADDR0, 0); 317 ahc_outb(ahc, SEQADDR1, 0); 318 ahc_unpause(ahc); 319 } 320 321 /************************* Input/Output Queues ********************************/ 322 void 323 ahc_run_qoutfifo(struct ahc_softc *ahc) 324 { 325 struct scb *scb; 326 u_int scb_index; 327 328 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD); 329 while (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) { 330 331 scb_index = ahc->qoutfifo[ahc->qoutfifonext]; 332 if ((ahc->qoutfifonext & 0x03) == 0x03) { 333 u_int modnext; 334 335 /* 336 * Clear 32bits of QOUTFIFO at a time 337 * so that we don't clobber an incoming 338 * byte DMA to the array on architectures 339 * that only support 32bit load and store 340 * operations. 341 */ 342 modnext = ahc->qoutfifonext & ~0x3; 343 *((uint32_t *)(&ahc->qoutfifo[modnext])) = 0xFFFFFFFFUL; 344 ahc_dmamap_sync(ahc, ahc->parent_dmat /*shared_data_dmat*/, 345 ahc->shared_data_dmamap, 346 /*offset*/modnext, /*len*/4, 347 BUS_DMASYNC_PREREAD); 348 } 349 ahc->qoutfifonext++; 350 351 scb = ahc_lookup_scb(ahc, scb_index); 352 if (scb == NULL) { 353 printf("%s: WARNING no command for scb %d " 354 "(cmdcmplt)\nQOUTPOS = %d\n", 355 ahc_name(ahc), scb_index, 356 (ahc->qoutfifonext - 1) & 0xFF); 357 continue; 358 } 359 360 /* 361 * Save off the residual 362 * if there is one. 363 */ 364 ahc_update_residual(ahc, scb); 365 ahc_done(ahc, scb); 366 } 367 } 368 369 void 370 ahc_run_untagged_queues(struct ahc_softc *ahc) 371 { 372 int i; 373 374 for (i = 0; i < 16; i++) 375 ahc_run_untagged_queue(ahc, &ahc->untagged_queues[i]); 376 } 377 378 void 379 ahc_run_untagged_queue(struct ahc_softc *ahc, struct scb_tailq *queue) 380 { 381 struct scb *scb; 382 383 if (ahc->untagged_queue_lock != 0) 384 return; 385 386 if ((scb = TAILQ_FIRST(queue)) != NULL 387 && (scb->flags & SCB_ACTIVE) == 0) { 388 scb->flags |= SCB_ACTIVE; 389 ahc_queue_scb(ahc, scb); 390 } 391 } 392 393 /************************* Interrupt Handling *********************************/ 394 void 395 ahc_handle_brkadrint(struct ahc_softc *ahc) 396 { 397 /* 398 * We upset the sequencer :-( 399 * Lookup the error message 400 */ 401 int i; 402 int error; 403 404 error = ahc_inb(ahc, ERROR); 405 for (i = 0; error != 1 && i < num_errors; i++) 406 error >>= 1; 407 printf("%s: brkadrint, %s at seqaddr = 0x%x\n", 408 ahc_name(ahc), ahc_hard_errors[i].errmesg, 409 ahc_inb(ahc, SEQADDR0) | 410 (ahc_inb(ahc, SEQADDR1) << 8)); 411 412 ahc_dump_card_state(ahc); 413 414 /* Tell everyone that this HBA is no longer available */ 415 ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 416 CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN, 417 CAM_NO_HBA); 418 419 /* Disable all interrupt sources by resetting the controller */ 420 ahc_shutdown(ahc); 421 } 422 423 void 424 ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat) 425 { 426 struct scb *scb; 427 struct ahc_devinfo devinfo; 428 429 ahc_fetch_devinfo(ahc, &devinfo); 430 431 /* 432 * Clear the upper byte that holds SEQINT status 433 * codes and clear the SEQINT bit. We will unpause 434 * the sequencer, if appropriate, after servicing 435 * the request. 436 */ 437 ahc_outb(ahc, CLRINT, CLRSEQINT); 438 switch (intstat & SEQINT_MASK) { 439 case BAD_STATUS: 440 { 441 u_int scb_index; 442 struct hardware_scb *hscb; 443 444 /* 445 * Set the default return value to 0 (don't 446 * send sense). The sense code will change 447 * this if needed. 448 */ 449 ahc_outb(ahc, RETURN_1, 0); 450 451 /* 452 * The sequencer will notify us when a command 453 * has an error that would be of interest to 454 * the kernel. This allows us to leave the sequencer 455 * running in the common case of command completes 456 * without error. The sequencer will already have 457 * DMA'd the SCB back up to us, so we can reference 458 * the in kernel copy directly. 459 */ 460 scb_index = ahc_inb(ahc, SCB_TAG); 461 scb = ahc_lookup_scb(ahc, scb_index); 462 if (scb == NULL) { 463 ahc_print_devinfo(ahc, &devinfo); 464 printf("ahc_intr - referenced scb " 465 "not valid during seqint 0x%x scb(%d)\n", 466 intstat, scb_index); 467 ahc_dump_card_state(ahc); 468 panic("for safety"); 469 goto unpause; 470 } 471 472 hscb = scb->hscb; 473 474 /* Don't want to clobber the original sense code */ 475 if ((scb->flags & SCB_SENSE) != 0) { 476 /* 477 * Clear the SCB_SENSE Flag and have 478 * the sequencer do a normal command 479 * complete. 480 */ 481 scb->flags &= ~SCB_SENSE; 482 break; 483 } 484 /* Freeze the queue until the client sees the error. */ 485 ahc_freeze_devq(ahc, scb); 486 ahc_freeze_scb(scb); 487 ahc_set_scsi_status(scb, hscb->shared_data.status.scsi_status); 488 switch (hscb->shared_data.status.scsi_status) { 489 case SCSI_STATUS_OK: 490 printf("%s: Interrupted for status of 0 (?)\n", 491 ahc_name(ahc)); 492 break; 493 case SCSI_STATUS_CMD_TERMINATED: 494 case SCSI_STATUS_CHECK_COND: 495 { 496 struct ahc_dma_seg *sg; 497 struct scsi_request_sense *sc; 498 struct ahc_initiator_tinfo *targ_info; 499 struct ahc_tmode_tstate *tstate; 500 struct ahc_transinfo *tinfo; 501 uint32_t len; 502 #ifdef AHC_DEBUG 503 if (ahc_debug & AHC_SHOW_SENSE) { 504 ahc_print_path(ahc, scb); 505 printf("SCB %d: requests Check Status\n", 506 scb->hscb->tag); 507 } 508 #endif 509 510 if (ahc_perform_autosense(scb) == 0) 511 break; 512 513 targ_info = ahc_fetch_transinfo(ahc, 514 devinfo.channel, 515 devinfo.our_scsiid, 516 devinfo.target, 517 &tstate); 518 tinfo = &targ_info->curr; 519 sg = scb->sg_list; 520 sc = (struct scsi_request_sense *)(&hscb->shared_data.cdb); 521 /* 522 * Save off the residual if there is one. 523 */ 524 ahc_update_residual(ahc, scb); 525 #ifdef AHC_DEBUG 526 if (ahc_debug & AHC_SHOW_SENSE) { 527 ahc_print_path(ahc, scb); 528 printf("Sending Sense\n"); 529 } 530 #endif 531 sg->addr = ahc_htole32(ahc_get_sense_bufaddr(ahc, scb)); 532 len = ahc_get_sense_bufsize(ahc, scb); 533 sg->len = ahc_htole32(len | AHC_DMA_LAST_SEG); 534 535 memset(sc, 0, sizeof(*sc)); 536 sc->opcode = SCSI_REQUEST_SENSE; 537 if (tinfo->protocol_version <= SCSI_REV_2 538 && SCB_GET_LUN(scb) < 8) 539 sc->byte2 = SCB_GET_LUN(scb) << 5; 540 sc->length = len; 541 542 /* 543 * We can't allow the target to disconnect. 544 * This will be an untagged transaction and 545 * having the target disconnect will make this 546 * transaction indistinguishable from outstanding 547 * tagged transactions. 548 */ 549 hscb->control = 0; 550 551 /* 552 * This request sense could be because the 553 * the device lost power or in some other 554 * way has lost our transfer negotiations. 555 * Renegotiate if appropriate. Unit attention 556 * errors will be reported before any data 557 * phases occur. 558 */ 559 if (ahc_get_residual(scb) 560 == ahc_get_transfer_length(scb)) { 561 ahc_update_neg_request(ahc, &devinfo, 562 tstate, targ_info, 563 AHC_NEG_IF_NON_ASYNC); 564 } 565 if (tstate->auto_negotiate & devinfo.target_mask) { 566 hscb->control |= MK_MESSAGE; 567 scb->flags &= ~SCB_NEGOTIATE; 568 scb->flags |= SCB_AUTO_NEGOTIATE; 569 } 570 hscb->cdb_len = sizeof(*sc); 571 hscb->dataptr = sg->addr; 572 hscb->datacnt = sg->len; 573 hscb->sgptr = 574 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 575 scb->sg_count = 1; 576 scb->flags |= SCB_SENSE; 577 ahc_qinfifo_requeue_tail(ahc, scb); 578 ahc_outb(ahc, RETURN_1, SEND_SENSE); 579 /* 580 * Ensure we have enough time to actually 581 * retrieve the sense. 582 */ 583 ahc_scb_timer_reset(scb, 5 * 1000000); 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 *scb1; 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 scb1 = ahc_lookup_scb(ahc, scb_index); 706 if (devinfo.role == ROLE_INITIATOR) { 707 if (scb1 == 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 scb1); 715 else { 716 ahc->msg_type = 717 MSG_TYPE_INITIATOR_MSGIN; 718 ahc->msgin_index = 0; 719 } 720 } 721 #if 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 scb1); 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) { 754 755 if ((ahc->features & AHC_DT) == 0) { 756 u_int curphase; 757 758 /* 759 * The hardware will only let you ack bytes 760 * if the expected phase in SCSISIGO matches 761 * the current phase. Make sure this is 762 * currently the case. 763 */ 764 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 765 ahc_outb(ahc, LASTPHASE, curphase); 766 ahc_outb(ahc, SCSISIGO, curphase); 767 } 768 if ((ahc_inb(ahc, SCSISIGI) & (CDI|MSGI)) == 0) { 769 int wait; 770 771 /* 772 * In a data phase. Faster to bitbucket 773 * the data than to individually ack each 774 * byte. This is also the only strategy 775 * that will work with AUTOACK enabled. 776 */ 777 ahc_outb(ahc, SXFRCTL1, 778 ahc_inb(ahc, SXFRCTL1) | BITBUCKET); 779 wait = 5000; 780 while (--wait != 0) { 781 if ((ahc_inb(ahc, SCSISIGI) 782 & (CDI|MSGI)) != 0) 783 break; 784 ahc_delay(100); 785 } 786 ahc_outb(ahc, SXFRCTL1, 787 ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET); 788 if (wait == 0) { 789 struct scb *scb1; 790 u_int scb_index; 791 792 ahc_print_devinfo(ahc, &devinfo); 793 printf("Unable to clear parity error. " 794 "Resetting bus.\n"); 795 scb_index = ahc_inb(ahc, SCB_TAG); 796 scb1 = ahc_lookup_scb(ahc, scb_index); 797 if (scb1 != NULL) 798 ahc_set_transaction_status(scb1, 799 CAM_UNCOR_PARITY); 800 ahc_reset_channel(ahc, devinfo.channel, 801 /*init reset*/TRUE); 802 } 803 } else { 804 (void)ahc_inb(ahc, SCSIDATL); 805 } 806 } 807 break; 808 } 809 case DATA_OVERRUN: 810 { 811 /* 812 * When the sequencer detects an overrun, it 813 * places the controller in "BITBUCKET" mode 814 * and allows the target to complete its transfer. 815 * Unfortunately, none of the counters get updated 816 * when the controller is in this mode, so we have 817 * no way of knowing how large the overrun was. 818 */ 819 u_int scbindex = ahc_inb(ahc, SCB_TAG); 820 u_int lastphase = ahc_inb(ahc, LASTPHASE); 821 u_int i; 822 823 scb = ahc_lookup_scb(ahc, scbindex); 824 for (i = 0; i < num_phases; i++) { 825 if (lastphase == ahc_phase_table[i].phase) 826 break; 827 } 828 ahc_print_path(ahc, scb); 829 printf("data overrun detected %s." 830 " Tag == 0x%x.\n", 831 ahc_phase_table[i].phasemsg, 832 scb->hscb->tag); 833 ahc_print_path(ahc, scb); 834 printf("%s seen Data Phase. Length = %ld. NumSGs = %d.\n", 835 ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't", 836 ahc_get_transfer_length(scb), scb->sg_count); 837 if (scb->sg_count > 0) { 838 for (i = 0; i < scb->sg_count; i++) { 839 840 printf("sg[%d] - Addr 0x%x%x : Length %d\n", 841 i, 842 (ahc_le32toh(scb->sg_list[i].len) >> 24 843 & SG_HIGH_ADDR_BITS), 844 ahc_le32toh(scb->sg_list[i].addr), 845 ahc_le32toh(scb->sg_list[i].len) 846 & AHC_SG_LEN_MASK); 847 } 848 } 849 /* 850 * Set this and it will take effect when the 851 * target does a command complete. 852 */ 853 ahc_freeze_devq(ahc, scb); 854 if ((scb->flags & SCB_SENSE) == 0) { 855 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 856 } else { 857 scb->flags &= ~SCB_SENSE; 858 ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); 859 } 860 ahc_freeze_scb(scb); 861 862 if ((ahc->features & AHC_ULTRA2) != 0) { 863 /* 864 * Clear the channel in case we return 865 * to data phase later. 866 */ 867 ahc_outb(ahc, SXFRCTL0, 868 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN); 869 ahc_outb(ahc, SXFRCTL0, 870 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN); 871 } 872 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) { 873 u_int dscommand1; 874 875 /* Ensure HHADDR is 0 for future DMA operations. */ 876 dscommand1 = ahc_inb(ahc, DSCOMMAND1); 877 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0); 878 ahc_outb(ahc, HADDR, 0); 879 ahc_outb(ahc, DSCOMMAND1, dscommand1); 880 } 881 break; 882 } 883 case MKMSG_FAILED: 884 { 885 u_int scbindex; 886 887 printf("%s:%c:%d:%d: Attempt to issue message failed\n", 888 ahc_name(ahc), devinfo.channel, devinfo.target, 889 devinfo.lun); 890 scbindex = ahc_inb(ahc, SCB_TAG); 891 scb = ahc_lookup_scb(ahc, scbindex); 892 if (scb != NULL 893 && (scb->flags & SCB_RECOVERY_SCB) != 0) 894 /* 895 * Ensure that we didn't put a second instance of this 896 * SCB into the QINFIFO. 897 */ 898 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb), 899 SCB_GET_CHANNEL(ahc, scb), 900 SCB_GET_LUN(scb), scb->hscb->tag, 901 ROLE_INITIATOR, /*status*/0, 902 SEARCH_REMOVE); 903 break; 904 } 905 case NO_FREE_SCB: 906 { 907 printf("%s: No free or disconnected SCBs\n", ahc_name(ahc)); 908 ahc_dump_card_state(ahc); 909 panic("for safety"); 910 break; 911 } 912 case SCB_MISMATCH: 913 { 914 u_int scbptr; 915 916 scbptr = ahc_inb(ahc, SCBPTR); 917 printf("Bogus TAG after DMA. SCBPTR %d, tag %d, our tag %d\n", 918 scbptr, ahc_inb(ahc, ARG_1), 919 ahc->scb_data->hscbs[scbptr].tag); 920 ahc_dump_card_state(ahc); 921 panic("for saftey"); 922 break; 923 } 924 case OUT_OF_RANGE: 925 { 926 printf("%s: BTT calculation out of range\n", ahc_name(ahc)); 927 printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, " 928 "ARG_1 == 0x%x ACCUM = 0x%x\n", 929 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN), 930 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM)); 931 printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, " 932 "SINDEX == 0x%x\n, A == 0x%x\n", 933 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR), 934 ahc_index_busy_tcl(ahc, 935 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID), 936 ahc_inb(ahc, SAVED_LUN))), 937 ahc_inb(ahc, SINDEX), 938 ahc_inb(ahc, ACCUM)); 939 printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, " 940 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n", 941 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID), 942 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG), 943 ahc_inb(ahc, SCB_CONTROL)); 944 printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n", 945 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI)); 946 ahc_dump_card_state(ahc); 947 panic("for safety"); 948 break; 949 } 950 default: 951 printf("ahc_intr: seqint, " 952 "intstat == 0x%x, scsisigi = 0x%x\n", 953 intstat, ahc_inb(ahc, SCSISIGI)); 954 break; 955 } 956 unpause: 957 /* 958 * The sequencer is paused immediately on 959 * a SEQINT, so we should restart it when 960 * we're done. 961 */ 962 ahc_unpause(ahc); 963 } 964 965 void 966 ahc_handle_scsiint(struct ahc_softc *ahc, u_int intstat __unused) 967 { 968 u_int scb_index; 969 u_int status0; 970 u_int status; 971 struct scb *scb; 972 char cur_channel; 973 char intr_channel; 974 975 if ((ahc->features & AHC_TWIN) != 0 976 && ((ahc_inb(ahc, SBLKCTL) & SELBUSB) != 0)) 977 cur_channel = 'B'; 978 else 979 cur_channel = 'A'; 980 intr_channel = cur_channel; 981 982 if ((ahc->features & AHC_ULTRA2) != 0) 983 status0 = ahc_inb(ahc, SSTAT0) & IOERR; 984 else 985 status0 = 0; 986 status = ahc_inb(ahc, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR); 987 if (status == 0 && status0 == 0) { 988 if ((ahc->features & AHC_TWIN) != 0) { 989 /* Try the other channel */ 990 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB); 991 status = ahc_inb(ahc, SSTAT1) 992 & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR); 993 intr_channel = (cur_channel == 'A') ? 'B' : 'A'; 994 } 995 if (status == 0) { 996 printf("%s: Spurious SCSI interrupt\n", ahc_name(ahc)); 997 ahc_outb(ahc, CLRINT, CLRSCSIINT); 998 ahc_unpause(ahc); 999 return; 1000 } 1001 } 1002 1003 /* Make sure the sequencer is in a safe location. */ 1004 ahc_clear_critical_section(ahc); 1005 1006 scb_index = ahc_inb(ahc, SCB_TAG); 1007 scb = ahc_lookup_scb(ahc, scb_index); 1008 if (scb != NULL 1009 && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) != 0) 1010 scb = NULL; 1011 1012 if ((ahc->features & AHC_ULTRA2) != 0 1013 && (status0 & IOERR) != 0) { 1014 int now_lvd; 1015 1016 now_lvd = ahc_inb(ahc, SBLKCTL) & ENAB40; 1017 printf("%s: Transceiver State Has Changed to %s mode\n", 1018 ahc_name(ahc), now_lvd ? "LVD" : "SE"); 1019 ahc_outb(ahc, CLRSINT0, CLRIOERR); 1020 /* 1021 * When transitioning to SE mode, the reset line 1022 * glitches, triggering an arbitration bug in some 1023 * Ultra2 controllers. This bug is cleared when we 1024 * assert the reset line. Since a reset glitch has 1025 * already occurred with this transition and a 1026 * transceiver state change is handled just like 1027 * a bus reset anyway, asserting the reset line 1028 * ourselves is safe. 1029 */ 1030 ahc_reset_channel(ahc, intr_channel, 1031 /*Initiate Reset*/now_lvd == 0); 1032 } else if ((status & SCSIRSTI) != 0) { 1033 printf("%s: Someone reset channel %c\n", 1034 ahc_name(ahc), intr_channel); 1035 if (intr_channel != cur_channel) 1036 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB); 1037 ahc_reset_channel(ahc, intr_channel, /*Initiate Reset*/FALSE); 1038 } else if ((status & SCSIPERR) != 0) { 1039 /* 1040 * Determine the bus phase and queue an appropriate message. 1041 * SCSIPERR is latched true as soon as a parity error 1042 * occurs. If the sequencer acked the transfer that 1043 * caused the parity error and the currently presented 1044 * transfer on the bus has correct parity, SCSIPERR will 1045 * be cleared by CLRSCSIPERR. Use this to determine if 1046 * we should look at the last phase the sequencer recorded, 1047 * or the current phase presented on the bus. 1048 */ 1049 u_int mesg_out; 1050 u_int curphase; 1051 u_int errorphase; 1052 u_int lastphase; 1053 u_int scsirate; 1054 u_int i; 1055 u_int sstat2; 1056 int silent; 1057 1058 lastphase = ahc_inb(ahc, LASTPHASE); 1059 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 1060 sstat2 = ahc_inb(ahc, SSTAT2); 1061 ahc_outb(ahc, CLRSINT1, CLRSCSIPERR); 1062 /* 1063 * For all phases save DATA, the sequencer won't 1064 * automatically ack a byte that has a parity error 1065 * in it. So the only way that the current phase 1066 * could be 'data-in' is if the parity error is for 1067 * an already acked byte in the data phase. During 1068 * synchronous data-in transfers, we may actually 1069 * ack bytes before latching the current phase in 1070 * LASTPHASE, leading to the discrepancy between 1071 * curphase and lastphase. 1072 */ 1073 if ((ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0 1074 || curphase == P_DATAIN || curphase == P_DATAIN_DT) 1075 errorphase = curphase; 1076 else 1077 errorphase = lastphase; 1078 1079 for (i = 0; i < num_phases; i++) { 1080 if (errorphase == ahc_phase_table[i].phase) 1081 break; 1082 } 1083 mesg_out = ahc_phase_table[i].mesg_out; 1084 silent = FALSE; 1085 if (scb != NULL) { 1086 if (SCB_IS_SILENT(scb)) 1087 silent = TRUE; 1088 else 1089 ahc_print_path(ahc, scb); 1090 scb->flags |= SCB_TRANSMISSION_ERROR; 1091 } else 1092 printf("%s:%c:%d: ", ahc_name(ahc), intr_channel, 1093 SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID))); 1094 scsirate = ahc_inb(ahc, SCSIRATE); 1095 if (silent == FALSE) { 1096 printf("parity error detected %s. " 1097 "SEQADDR(0x%x) SCSIRATE(0x%x)\n", 1098 ahc_phase_table[i].phasemsg, 1099 ahc_inw(ahc, SEQADDR0), 1100 scsirate); 1101 if ((ahc->features & AHC_DT) != 0) { 1102 if ((sstat2 & CRCVALERR) != 0) 1103 printf("\tCRC Value Mismatch\n"); 1104 if ((sstat2 & CRCENDERR) != 0) 1105 printf("\tNo terminal CRC packet " 1106 "recevied\n"); 1107 if ((sstat2 & CRCREQERR) != 0) 1108 printf("\tIllegal CRC packet " 1109 "request\n"); 1110 if ((sstat2 & DUAL_EDGE_ERR) != 0) 1111 printf("\tUnexpected %sDT Data Phase\n", 1112 (scsirate & SINGLE_EDGE) 1113 ? "" : "non-"); 1114 } 1115 } 1116 1117 if ((ahc->features & AHC_DT) != 0 1118 && (sstat2 & DUAL_EDGE_ERR) != 0) { 1119 /* 1120 * This error applies regardless of 1121 * data direction, so ignore the value 1122 * in the phase table. 1123 */ 1124 mesg_out = MSG_INITIATOR_DET_ERR; 1125 } 1126 1127 /* 1128 * We've set the hardware to assert ATN if we 1129 * get a parity error on "in" phases, so all we 1130 * need to do is stuff the message buffer with 1131 * the appropriate message. "In" phases have set 1132 * mesg_out to something other than MSG_NOP. 1133 */ 1134 if (mesg_out != MSG_NOOP) { 1135 if (ahc->msg_type != MSG_TYPE_NONE) 1136 ahc->send_msg_perror = TRUE; 1137 else 1138 ahc_outb(ahc, MSG_OUT, mesg_out); 1139 } 1140 /* 1141 * Force a renegotiation with this target just in 1142 * case we are out of sync for some external reason 1143 * unknown (or unreported) by the target. 1144 */ 1145 ahc_force_renegotiation(ahc); 1146 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1147 ahc_unpause(ahc); 1148 } else if ((status & SELTO) != 0) { 1149 u_int scbptr; 1150 1151 /* Stop the selection */ 1152 ahc_outb(ahc, SCSISEQ, 0); 1153 1154 /* No more pending messages */ 1155 ahc_clear_msg_state(ahc); 1156 1157 /* Clear interrupt state */ 1158 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); 1159 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR); 1160 1161 /* 1162 * Although the driver does not care about the 1163 * 'Selection in Progress' status bit, the busy 1164 * LED does. SELINGO is only cleared by a sucessfull 1165 * selection, so we must manually clear it to insure 1166 * the LED turns off just incase no future successful 1167 * selections occur (e.g. no devices on the bus). 1168 */ 1169 ahc_outb(ahc, CLRSINT0, CLRSELINGO); 1170 1171 scbptr = ahc_inb(ahc, WAITING_SCBH); 1172 ahc_outb(ahc, SCBPTR, scbptr); 1173 scb_index = ahc_inb(ahc, SCB_TAG); 1174 1175 scb = ahc_lookup_scb(ahc, scb_index); 1176 if (scb == NULL) { 1177 printf("%s: ahc_intr - referenced scb not " 1178 "valid during SELTO scb(%d, %d)\n", 1179 ahc_name(ahc), scbptr, scb_index); 1180 ahc_dump_card_state(ahc); 1181 } else { 1182 #ifdef AHC_DEBUG 1183 if ((ahc_debug & AHC_SHOW_SELTO) != 0) { 1184 ahc_print_path(ahc, scb); 1185 printf("Saw Selection Timeout for SCB 0x%x\n", 1186 scb_index); 1187 } 1188 #endif 1189 /* 1190 * Force a renegotiation with this target just in 1191 * case the cable was pulled and will later be 1192 * re-attached. The target may forget its negotiation 1193 * settings with us should it attempt to reselect 1194 * during the interruption. The target will not issue 1195 * a unit attention in this case, so we must always 1196 * renegotiate. 1197 */ 1198 ahc_force_renegotiation(ahc); 1199 ahc_set_transaction_status(scb, CAM_SEL_TIMEOUT); 1200 ahc_freeze_devq(ahc, scb); 1201 } 1202 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1203 ahc_restart(ahc); 1204 } else if ((status & BUSFREE) != 0 1205 && (ahc_inb(ahc, SIMODE1) & ENBUSFREE) != 0) { 1206 u_int lastphase; 1207 u_int saved_scsiid; 1208 u_int saved_lun; 1209 u_int target; 1210 u_int initiator_role_id; 1211 char channel; 1212 int printerror; 1213 1214 /* 1215 * Clear our selection hardware as soon as possible. 1216 * We may have an entry in the waiting Q for this target, 1217 * that is affected by this busfree and we don't want to 1218 * go about selecting the target while we handle the event. 1219 */ 1220 ahc_outb(ahc, SCSISEQ, 1221 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); 1222 1223 /* 1224 * Disable busfree interrupts and clear the busfree 1225 * interrupt status. We do this here so that several 1226 * bus transactions occur prior to clearing the SCSIINT 1227 * latch. It can take a bit for the clearing to take effect. 1228 */ 1229 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); 1230 ahc_outb(ahc, CLRSINT1, CLRBUSFREE|CLRSCSIPERR); 1231 1232 /* 1233 * Look at what phase we were last in. 1234 * If its message out, chances are pretty good 1235 * that the busfree was in response to one of 1236 * our abort requests. 1237 */ 1238 lastphase = ahc_inb(ahc, LASTPHASE); 1239 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 1240 saved_lun = ahc_inb(ahc, SAVED_LUN); 1241 target = SCSIID_TARGET(ahc, saved_scsiid); 1242 initiator_role_id = SCSIID_OUR_ID(saved_scsiid); 1243 channel = SCSIID_CHANNEL(ahc, saved_scsiid); 1244 printerror = 1; 1245 1246 if (lastphase == P_MESGOUT) { 1247 struct ahc_devinfo devinfo; 1248 u_int tag; 1249 1250 ahc_fetch_devinfo(ahc, &devinfo); 1251 tag = SCB_LIST_NULL; 1252 if (ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT_TAG, TRUE) 1253 || ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT, TRUE)) { 1254 if (ahc->msgout_buf[ahc->msgout_index - 1] 1255 == MSG_ABORT_TAG) 1256 tag = scb->hscb->tag; 1257 ahc_print_path(ahc, scb); 1258 printf("SCB %d - Abort%s Completed.\n", 1259 scb->hscb->tag, tag == SCB_LIST_NULL ? 1260 "" : " Tag"); 1261 ahc_abort_scbs(ahc, target, channel, 1262 saved_lun, tag, 1263 ROLE_INITIATOR, 1264 CAM_REQ_ABORTED); 1265 printerror = 0; 1266 } else if (ahc_sent_msg(ahc, AHCMSG_1B, 1267 MSG_BUS_DEV_RESET, TRUE)) { 1268 #ifdef __FreeBSD__ 1269 /* 1270 * Don't mark the user's request for this BDR 1271 * as completing with CAM_BDR_SENT. CAM3 1272 * specifies CAM_REQ_CMP. 1273 */ 1274 if (scb != NULL 1275 && scb->io_ctx->ccb_h.func_code== XPT_RESET_DEV 1276 && ahc_match_scb(ahc, scb, target, channel, 1277 CAM_LUN_WILDCARD, 1278 SCB_LIST_NULL, 1279 ROLE_INITIATOR)) { 1280 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1281 } 1282 #endif 1283 ahc_compile_devinfo(&devinfo, 1284 initiator_role_id, 1285 target, 1286 CAM_LUN_WILDCARD, 1287 channel, 1288 ROLE_INITIATOR); 1289 ahc_handle_devreset(ahc, &devinfo, 1290 CAM_BDR_SENT, 1291 "Bus Device Reset", 1292 /*verbose_level*/0); 1293 printerror = 0; 1294 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, 1295 MSG_EXT_PPR, FALSE)) { 1296 struct ahc_initiator_tinfo *tinfo; 1297 struct ahc_tmode_tstate *tstate; 1298 1299 /* 1300 * PPR Rejected. Try non-ppr negotiation 1301 * and retry command. 1302 */ 1303 tinfo = ahc_fetch_transinfo(ahc, 1304 devinfo.channel, 1305 devinfo.our_scsiid, 1306 devinfo.target, 1307 &tstate); 1308 tinfo->curr.transport_version = 2; 1309 tinfo->goal.transport_version = 2; 1310 tinfo->goal.ppr_options = 0; 1311 ahc_qinfifo_requeue_tail(ahc, scb); 1312 printerror = 0; 1313 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, 1314 MSG_EXT_WDTR, FALSE) 1315 || ahc_sent_msg(ahc, AHCMSG_EXT, 1316 MSG_EXT_SDTR, FALSE)) { 1317 /* 1318 * Negotiation Rejected. Go-async and 1319 * retry command. 1320 */ 1321 ahc_set_width(ahc, &devinfo, 1322 MSG_EXT_WDTR_BUS_8_BIT, 1323 AHC_TRANS_CUR|AHC_TRANS_GOAL, 1324 /*paused*/TRUE); 1325 ahc_set_syncrate(ahc, &devinfo, 1326 /*syncrate*/NULL, 1327 /*period*/0, /*offset*/0, 1328 /*ppr_options*/0, 1329 AHC_TRANS_CUR|AHC_TRANS_GOAL, 1330 /*paused*/TRUE); 1331 ahc_qinfifo_requeue_tail(ahc, scb); 1332 printerror = 0; 1333 } 1334 } 1335 if (printerror != 0) { 1336 u_int i; 1337 1338 if (scb != NULL) { 1339 u_int tag; 1340 1341 if ((scb->hscb->control & TAG_ENB) != 0) 1342 tag = scb->hscb->tag; 1343 else 1344 tag = SCB_LIST_NULL; 1345 ahc_print_path(ahc, scb); 1346 ahc_abort_scbs(ahc, target, channel, 1347 SCB_GET_LUN(scb), tag, 1348 ROLE_INITIATOR, 1349 CAM_UNEXP_BUSFREE); 1350 } else { 1351 /* 1352 * We had not fully identified this connection, 1353 * so we cannot abort anything. 1354 */ 1355 printf("%s: ", ahc_name(ahc)); 1356 } 1357 for (i = 0; i < num_phases; i++) { 1358 if (lastphase == ahc_phase_table[i].phase) 1359 break; 1360 } 1361 /* 1362 * Renegotiate with this device at the 1363 * next opportunity just in case this busfree 1364 * is due to a negotiation mismatch with the 1365 * device. 1366 */ 1367 ahc_force_renegotiation(ahc); 1368 printf("Unexpected busfree %s\n" 1369 "SEQADDR == 0x%x\n", 1370 ahc_phase_table[i].phasemsg, 1371 ahc_inb(ahc, SEQADDR0) 1372 | (ahc_inb(ahc, SEQADDR1) << 8)); 1373 } 1374 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1375 ahc_restart(ahc); 1376 } else { 1377 printf("%s: Missing case in ahc_handle_scsiint. status = %x\n", 1378 ahc_name(ahc), status); 1379 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1380 } 1381 } 1382 1383 /* 1384 * Force renegotiation to occur the next time we initiate 1385 * a command to the current device. 1386 */ 1387 static void 1388 ahc_force_renegotiation(struct ahc_softc *ahc) 1389 { 1390 struct ahc_devinfo devinfo; 1391 struct ahc_initiator_tinfo *targ_info; 1392 struct ahc_tmode_tstate *tstate; 1393 1394 ahc_fetch_devinfo(ahc, &devinfo); 1395 targ_info = ahc_fetch_transinfo(ahc, 1396 devinfo.channel, 1397 devinfo.our_scsiid, 1398 devinfo.target, 1399 &tstate); 1400 ahc_update_neg_request(ahc, &devinfo, tstate, 1401 targ_info, AHC_NEG_IF_NON_ASYNC); 1402 } 1403 1404 #define AHC_MAX_STEPS 2000 1405 void 1406 ahc_clear_critical_section(struct ahc_softc *ahc) 1407 { 1408 int stepping; 1409 int steps; 1410 u_int simode0; 1411 u_int simode1; 1412 1413 if (ahc->num_critical_sections == 0) 1414 return; 1415 1416 stepping = FALSE; 1417 steps = 0; 1418 simode0 = 0; 1419 simode1 = 0; 1420 for (;;) { 1421 struct cs *cs; 1422 u_int seqaddr; 1423 u_int i; 1424 1425 seqaddr = ahc_inb(ahc, SEQADDR0) 1426 | (ahc_inb(ahc, SEQADDR1) << 8); 1427 1428 /* 1429 * Seqaddr represents the next instruction to execute, 1430 * so we are really executing the instruction just 1431 * before it. 1432 */ 1433 if (seqaddr != 0) 1434 seqaddr -= 1; 1435 cs = ahc->critical_sections; 1436 for (i = 0; i < ahc->num_critical_sections; i++, cs++) { 1437 1438 if (cs->begin < seqaddr && cs->end >= seqaddr) 1439 break; 1440 } 1441 1442 if (i == ahc->num_critical_sections) 1443 break; 1444 1445 if (steps > AHC_MAX_STEPS) { 1446 printf("%s: Infinite loop in critical section\n", 1447 ahc_name(ahc)); 1448 ahc_dump_card_state(ahc); 1449 panic("critical section loop"); 1450 } 1451 1452 steps++; 1453 if (stepping == FALSE) { 1454 1455 /* 1456 * Disable all interrupt sources so that the 1457 * sequencer will not be stuck by a pausing 1458 * interrupt condition while we attempt to 1459 * leave a critical section. 1460 */ 1461 simode0 = ahc_inb(ahc, SIMODE0); 1462 ahc_outb(ahc, SIMODE0, 0); 1463 simode1 = ahc_inb(ahc, SIMODE1); 1464 if ((ahc->features & AHC_DT) != 0) 1465 /* 1466 * On DT class controllers, we 1467 * use the enhanced busfree logic. 1468 * Unfortunately we cannot re-enable 1469 * busfree detection within the 1470 * current connection, so we must 1471 * leave it on while single stepping. 1472 */ 1473 ahc_outb(ahc, SIMODE1, ENBUSFREE); 1474 else 1475 ahc_outb(ahc, SIMODE1, 0); 1476 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1477 ahc_outb(ahc, SEQCTL, ahc_inb(ahc, SEQCTL) | STEP); 1478 stepping = TRUE; 1479 } 1480 if ((ahc->features & AHC_DT) != 0) { 1481 ahc_outb(ahc, CLRSINT1, CLRBUSFREE); 1482 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1483 } 1484 ahc_outb(ahc, HCNTRL, ahc->unpause); 1485 while (!ahc_is_paused(ahc)) 1486 ahc_delay(200); 1487 } 1488 if (stepping) { 1489 ahc_outb(ahc, SIMODE0, simode0); 1490 ahc_outb(ahc, SIMODE1, simode1); 1491 ahc_outb(ahc, SEQCTL, ahc_inb(ahc, SEQCTL) & ~STEP); 1492 } 1493 } 1494 1495 /* 1496 * Clear any pending interrupt status. 1497 */ 1498 void 1499 ahc_clear_intstat(struct ahc_softc *ahc) 1500 { 1501 /* Clear any interrupt conditions this may have caused */ 1502 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI 1503 |CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG| 1504 CLRREQINIT); 1505 ahc_flush_device_writes(ahc); 1506 ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO); 1507 ahc_flush_device_writes(ahc); 1508 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1509 ahc_flush_device_writes(ahc); 1510 } 1511 1512 /**************************** Debugging Routines ******************************/ 1513 #ifdef AHC_DEBUG 1514 uint32_t ahc_debug = 0; /* AHC_SHOW_MISC|AHC_SHOW_SENSE|AHC_DEBUG_OPTS;*/ 1515 #endif 1516 1517 void 1518 ahc_print_scb(struct scb *scb) 1519 { 1520 int i; 1521 1522 struct hardware_scb *hscb = scb->hscb; 1523 1524 printf("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n", 1525 (void *)scb, 1526 hscb->control, 1527 hscb->scsiid, 1528 hscb->lun, 1529 hscb->cdb_len); 1530 printf("Shared Data: "); 1531 for (i = 0; i < sizeof(hscb->shared_data.cdb); i++) 1532 printf("%#02x", hscb->shared_data.cdb[i]); 1533 printf(" dataptr:%#x datacnt:%#x sgptr:%#x tag:%#x\n", 1534 ahc_le32toh(hscb->dataptr), 1535 ahc_le32toh(hscb->datacnt), 1536 ahc_le32toh(hscb->sgptr), 1537 hscb->tag); 1538 if (scb->sg_count > 0) { 1539 for (i = 0; i < scb->sg_count; i++) { 1540 printf("sg[%d] - Addr 0x%x%x : Length %d\n", 1541 i, 1542 (ahc_le32toh(scb->sg_list[i].len) >> 24 1543 & SG_HIGH_ADDR_BITS), 1544 ahc_le32toh(scb->sg_list[i].addr), 1545 ahc_le32toh(scb->sg_list[i].len)); 1546 } 1547 } 1548 } 1549 1550 /************************* Transfer Negotiation *******************************/ 1551 /* 1552 * Allocate per target mode instance (ID we respond to as a target) 1553 * transfer negotiation data structures. 1554 */ 1555 static struct ahc_tmode_tstate * 1556 ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel) 1557 { 1558 struct ahc_tmode_tstate *master_tstate; 1559 struct ahc_tmode_tstate *tstate; 1560 int i; 1561 1562 master_tstate = ahc->enabled_targets[ahc->our_id]; 1563 if (channel == 'B') { 1564 scsi_id += 8; 1565 master_tstate = ahc->enabled_targets[ahc->our_id_b + 8]; 1566 } 1567 if (ahc->enabled_targets[scsi_id] != NULL 1568 && ahc->enabled_targets[scsi_id] != master_tstate) 1569 panic("%s: ahc_alloc_tstate - Target already allocated", 1570 ahc_name(ahc)); 1571 tstate = (struct ahc_tmode_tstate*)malloc(sizeof(*tstate), 1572 M_DEVBUF, M_NOWAIT); 1573 if (tstate == NULL) 1574 return (NULL); 1575 1576 /* 1577 * If we have allocated a master tstate, copy user settings from 1578 * the master tstate (taken from SRAM or the EEPROM) for this 1579 * channel, but reset our current and goal settings to async/narrow 1580 * until an initiator talks to us. 1581 */ 1582 if (master_tstate != NULL) { 1583 memcpy(tstate, master_tstate, sizeof(*tstate)); 1584 memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns)); 1585 tstate->ultraenb = 0; 1586 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1587 memset(&tstate->transinfo[i].curr, 0, 1588 sizeof(tstate->transinfo[i].curr)); 1589 memset(&tstate->transinfo[i].goal, 0, 1590 sizeof(tstate->transinfo[i].goal)); 1591 } 1592 } else 1593 memset(tstate, 0, sizeof(*tstate)); 1594 ahc->enabled_targets[scsi_id] = tstate; 1595 return (tstate); 1596 } 1597 1598 #ifdef AHC_TARGET_MODE 1599 /* 1600 * Free per target mode instance (ID we respond to as a target) 1601 * transfer negotiation data structures. 1602 */ 1603 static void 1604 ahc_free_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel, int force) 1605 { 1606 struct ahc_tmode_tstate *tstate; 1607 1608 /* 1609 * Don't clean up our "master" tstate. 1610 * It has our default user settings. 1611 */ 1612 if (((channel == 'B' && scsi_id == ahc->our_id_b) 1613 || (channel == 'A' && scsi_id == ahc->our_id)) 1614 && force == FALSE) 1615 return; 1616 1617 if (channel == 'B') 1618 scsi_id += 8; 1619 tstate = ahc->enabled_targets[scsi_id]; 1620 if (tstate != NULL) 1621 free(tstate, M_DEVBUF); 1622 ahc->enabled_targets[scsi_id] = NULL; 1623 } 1624 #endif 1625 1626 /* 1627 * Called when we have an active connection to a target on the bus, 1628 * this function finds the nearest syncrate to the input period limited 1629 * by the capabilities of the bus connectivity of and sync settings for 1630 * the target. 1631 */ 1632 struct ahc_syncrate * 1633 ahc_devlimited_syncrate(struct ahc_softc *ahc, 1634 struct ahc_initiator_tinfo *tinfo, 1635 u_int *period, u_int *ppr_options, role_t role) 1636 { 1637 struct ahc_transinfo *transinfo; 1638 u_int maxsync; 1639 1640 if ((ahc->features & AHC_ULTRA2) != 0) { 1641 if ((ahc_inb(ahc, SBLKCTL) & ENAB40) != 0 1642 && (ahc_inb(ahc, SSTAT2) & EXP_ACTIVE) == 0) { 1643 maxsync = AHC_SYNCRATE_DT; 1644 } else { 1645 maxsync = AHC_SYNCRATE_ULTRA; 1646 /* Can't do DT on an SE bus */ 1647 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 1648 } 1649 } else if ((ahc->features & AHC_ULTRA) != 0) { 1650 maxsync = AHC_SYNCRATE_ULTRA; 1651 } else { 1652 maxsync = AHC_SYNCRATE_FAST; 1653 } 1654 /* 1655 * Never allow a value higher than our current goal 1656 * period otherwise we may allow a target initiated 1657 * negotiation to go above the limit as set by the 1658 * user. In the case of an initiator initiated 1659 * sync negotiation, we limit based on the user 1660 * setting. This allows the system to still accept 1661 * incoming negotiations even if target initiated 1662 * negotiation is not performed. 1663 */ 1664 if (role == ROLE_TARGET) 1665 transinfo = &tinfo->user; 1666 else 1667 transinfo = &tinfo->goal; 1668 *ppr_options &= transinfo->ppr_options; 1669 if (transinfo->width == MSG_EXT_WDTR_BUS_8_BIT) { 1670 maxsync = MAX(maxsync, AHC_SYNCRATE_ULTRA2); 1671 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 1672 } 1673 if (transinfo->period == 0) { 1674 *period = 0; 1675 *ppr_options = 0; 1676 return (NULL); 1677 } 1678 *period = MAX(*period, transinfo->period); 1679 return (ahc_find_syncrate(ahc, period, ppr_options, maxsync)); 1680 } 1681 1682 /* 1683 * Look up the valid period to SCSIRATE conversion in our table. 1684 * Return the period and offset that should be sent to the target 1685 * if this was the beginning of an SDTR. 1686 */ 1687 struct ahc_syncrate * 1688 ahc_find_syncrate(struct ahc_softc *ahc, u_int *period, 1689 u_int *ppr_options, u_int maxsync) 1690 { 1691 struct ahc_syncrate *syncrate; 1692 1693 if ((ahc->features & AHC_DT) == 0) 1694 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 1695 1696 /* Skip all DT only entries if DT is not available */ 1697 if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0 1698 && maxsync < AHC_SYNCRATE_ULTRA2) 1699 maxsync = AHC_SYNCRATE_ULTRA2; 1700 1701 for (syncrate = &ahc_syncrates[maxsync]; 1702 syncrate->rate != NULL; 1703 syncrate++) { 1704 1705 /* 1706 * The Ultra2 table doesn't go as low 1707 * as for the Fast/Ultra cards. 1708 */ 1709 if ((ahc->features & AHC_ULTRA2) != 0 1710 && (syncrate->sxfr_u2 == 0)) 1711 break; 1712 1713 if (*period <= syncrate->period) { 1714 /* 1715 * When responding to a target that requests 1716 * sync, the requested rate may fall between 1717 * two rates that we can output, but still be 1718 * a rate that we can receive. Because of this, 1719 * we want to respond to the target with 1720 * the same rate that it sent to us even 1721 * if the period we use to send data to it 1722 * is lower. Only lower the response period 1723 * if we must. 1724 */ 1725 if (syncrate == &ahc_syncrates[maxsync]) 1726 *period = syncrate->period; 1727 1728 /* 1729 * At some speeds, we only support 1730 * ST transfers. 1731 */ 1732 if ((syncrate->sxfr_u2 & ST_SXFR) != 0) 1733 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 1734 break; 1735 } 1736 } 1737 1738 if ((*period == 0) 1739 || (syncrate->rate == NULL) 1740 || ((ahc->features & AHC_ULTRA2) != 0 1741 && (syncrate->sxfr_u2 == 0))) { 1742 /* Use asynchronous transfers. */ 1743 *period = 0; 1744 syncrate = NULL; 1745 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 1746 } 1747 return (syncrate); 1748 } 1749 1750 /* 1751 * Convert from an entry in our syncrate table to the SCSI equivalent 1752 * sync "period" factor. 1753 */ 1754 u_int 1755 ahc_find_period(struct ahc_softc *ahc, u_int scsirate, u_int maxsync) 1756 { 1757 struct ahc_syncrate *syncrate; 1758 1759 if ((ahc->features & AHC_ULTRA2) != 0) 1760 scsirate &= SXFR_ULTRA2; 1761 else 1762 scsirate &= SXFR; 1763 1764 syncrate = &ahc_syncrates[maxsync]; 1765 while (syncrate->rate != NULL) { 1766 1767 if ((ahc->features & AHC_ULTRA2) != 0) { 1768 if (syncrate->sxfr_u2 == 0) 1769 break; 1770 else if (scsirate == (syncrate->sxfr_u2 & SXFR_ULTRA2)) 1771 return (syncrate->period); 1772 } else if (scsirate == (syncrate->sxfr & SXFR)) { 1773 return (syncrate->period); 1774 } 1775 syncrate++; 1776 } 1777 return (0); /* async */ 1778 } 1779 1780 /* 1781 * Truncate the given synchronous offset to a value the 1782 * current adapter type and syncrate are capable of. 1783 */ 1784 void 1785 ahc_validate_offset(struct ahc_softc *ahc, 1786 struct ahc_initiator_tinfo *tinfo, 1787 struct ahc_syncrate *syncrate, 1788 u_int *offset, int wide, role_t role) 1789 { 1790 u_int maxoffset; 1791 1792 /* Limit offset to what we can do */ 1793 if (syncrate == NULL) { 1794 maxoffset = 0; 1795 } else if ((ahc->features & AHC_ULTRA2) != 0) { 1796 maxoffset = MAX_OFFSET_ULTRA2; 1797 } else { 1798 if (wide) 1799 maxoffset = MAX_OFFSET_16BIT; 1800 else 1801 maxoffset = MAX_OFFSET_8BIT; 1802 } 1803 *offset = MIN(*offset, maxoffset); 1804 if (tinfo != NULL) { 1805 if (role == ROLE_TARGET) 1806 *offset = MIN(*offset, tinfo->user.offset); 1807 else 1808 *offset = MIN(*offset, tinfo->goal.offset); 1809 } 1810 } 1811 1812 /* 1813 * Truncate the given transfer width parameter to a value the 1814 * current adapter type is capable of. 1815 */ 1816 void 1817 ahc_validate_width(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo, 1818 u_int *bus_width, role_t role) 1819 { 1820 switch (*bus_width) { 1821 default: 1822 if (ahc->features & AHC_WIDE) { 1823 /* Respond Wide */ 1824 *bus_width = MSG_EXT_WDTR_BUS_16_BIT; 1825 break; 1826 } 1827 /* FALLTHROUGH */ 1828 case MSG_EXT_WDTR_BUS_8_BIT: 1829 *bus_width = MSG_EXT_WDTR_BUS_8_BIT; 1830 break; 1831 } 1832 if (tinfo != NULL) { 1833 if (role == ROLE_TARGET) 1834 *bus_width = MIN(tinfo->user.width, *bus_width); 1835 else 1836 *bus_width = MIN(tinfo->goal.width, *bus_width); 1837 } 1838 } 1839 1840 /* 1841 * Update the bitmask of targets for which the controller should 1842 * negotiate with at the next convenient opportunity. This currently 1843 * means the next time we send the initial identify messages for 1844 * a new transaction. 1845 */ 1846 int 1847 ahc_update_neg_request(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 1848 struct ahc_tmode_tstate *tstate, 1849 struct ahc_initiator_tinfo *tinfo, ahc_neg_type neg_type) 1850 { 1851 u_int auto_negotiate_orig; 1852 1853 auto_negotiate_orig = tstate->auto_negotiate; 1854 if (neg_type == AHC_NEG_ALWAYS) { 1855 /* 1856 * Force our "current" settings to be 1857 * unknown so that unless a bus reset 1858 * occurs the need to renegotiate is 1859 * recorded persistently. 1860 */ 1861 if ((ahc->features & AHC_WIDE) != 0) 1862 tinfo->curr.width = AHC_WIDTH_UNKNOWN; 1863 tinfo->curr.period = AHC_PERIOD_UNKNOWN; 1864 tinfo->curr.offset = AHC_OFFSET_UNKNOWN; 1865 } 1866 if (tinfo->curr.period != tinfo->goal.period 1867 || tinfo->curr.width != tinfo->goal.width 1868 || tinfo->curr.offset != tinfo->goal.offset 1869 || tinfo->curr.ppr_options != tinfo->goal.ppr_options 1870 || (neg_type == AHC_NEG_IF_NON_ASYNC 1871 && (tinfo->goal.offset != 0 1872 || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT 1873 || tinfo->goal.ppr_options != 0))) 1874 tstate->auto_negotiate |= devinfo->target_mask; 1875 else 1876 tstate->auto_negotiate &= ~devinfo->target_mask; 1877 1878 return (auto_negotiate_orig != tstate->auto_negotiate); 1879 } 1880 1881 /* 1882 * Update the user/goal/curr tables of synchronous negotiation 1883 * parameters as well as, in the case of a current or active update, 1884 * any data structures on the host controller. In the case of an 1885 * active update, the specified target is currently talking to us on 1886 * the bus, so the transfer parameter update must take effect 1887 * immediately. 1888 */ 1889 void 1890 ahc_set_syncrate(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 1891 struct ahc_syncrate *syncrate, u_int period, 1892 u_int offset, u_int ppr_options, u_int type, int paused __unused) 1893 { 1894 struct ahc_initiator_tinfo *tinfo; 1895 struct ahc_tmode_tstate *tstate; 1896 u_int old_period; 1897 u_int old_offset; 1898 u_int old_ppr; 1899 int active; 1900 int update_needed; 1901 1902 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE; 1903 update_needed = 0; 1904 1905 if (syncrate == NULL) { 1906 period = 0; 1907 offset = 0; 1908 } 1909 1910 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 1911 devinfo->target, &tstate); 1912 1913 if ((type & AHC_TRANS_USER) != 0) { 1914 tinfo->user.period = period; 1915 tinfo->user.offset = offset; 1916 tinfo->user.ppr_options = ppr_options; 1917 } 1918 1919 if ((type & AHC_TRANS_GOAL) != 0) { 1920 tinfo->goal.period = period; 1921 tinfo->goal.offset = offset; 1922 tinfo->goal.ppr_options = ppr_options; 1923 } 1924 1925 old_period = tinfo->curr.period; 1926 old_offset = tinfo->curr.offset; 1927 old_ppr = tinfo->curr.ppr_options; 1928 1929 if ((type & AHC_TRANS_CUR) != 0 1930 && (old_period != period 1931 || old_offset != offset 1932 || old_ppr != ppr_options)) { 1933 u_int scsirate; 1934 1935 update_needed++; 1936 scsirate = tinfo->scsirate; 1937 if ((ahc->features & AHC_ULTRA2) != 0) { 1938 1939 scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC); 1940 if (syncrate != NULL) { 1941 scsirate |= syncrate->sxfr_u2; 1942 if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) 1943 scsirate |= ENABLE_CRC; 1944 else 1945 scsirate |= SINGLE_EDGE; 1946 } 1947 } else { 1948 1949 scsirate &= ~(SXFR|SOFS); 1950 /* 1951 * Ensure Ultra mode is set properly for 1952 * this target. 1953 */ 1954 tstate->ultraenb &= ~devinfo->target_mask; 1955 if (syncrate != NULL) { 1956 if (syncrate->sxfr & ULTRA_SXFR) { 1957 tstate->ultraenb |= 1958 devinfo->target_mask; 1959 } 1960 scsirate |= syncrate->sxfr & SXFR; 1961 scsirate |= offset & SOFS; 1962 } 1963 if (active) { 1964 u_int sxfrctl0; 1965 1966 sxfrctl0 = ahc_inb(ahc, SXFRCTL0); 1967 sxfrctl0 &= ~FAST20; 1968 if (tstate->ultraenb & devinfo->target_mask) 1969 sxfrctl0 |= FAST20; 1970 ahc_outb(ahc, SXFRCTL0, sxfrctl0); 1971 } 1972 } 1973 if (active) { 1974 ahc_outb(ahc, SCSIRATE, scsirate); 1975 if ((ahc->features & AHC_ULTRA2) != 0) 1976 ahc_outb(ahc, SCSIOFFSET, offset); 1977 } 1978 1979 tinfo->scsirate = scsirate; 1980 tinfo->curr.period = period; 1981 tinfo->curr.offset = offset; 1982 tinfo->curr.ppr_options = ppr_options; 1983 1984 ahc_send_async(ahc, devinfo->channel, devinfo->target, 1985 CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL); 1986 if (bootverbose) { 1987 if (offset != 0) { 1988 printf("%s: target %d synchronous at %sMHz%s, " 1989 "offset = 0x%x\n", ahc_name(ahc), 1990 devinfo->target, syncrate->rate, 1991 (ppr_options & MSG_EXT_PPR_DT_REQ) 1992 ? " DT" : "", offset); 1993 } else { 1994 printf("%s: target %d using " 1995 "asynchronous transfers\n", 1996 ahc_name(ahc), devinfo->target); 1997 } 1998 } 1999 } 2000 2001 update_needed += ahc_update_neg_request(ahc, devinfo, tstate, 2002 tinfo, AHC_NEG_TO_GOAL); 2003 2004 if (update_needed) 2005 ahc_update_pending_scbs(ahc); 2006 } 2007 2008 /* 2009 * Update the user/goal/curr tables of wide negotiation 2010 * parameters as well as, in the case of a current or active update, 2011 * any data structures on the host controller. In the case of an 2012 * active update, the specified target is currently talking to us on 2013 * the bus, so the transfer parameter update must take effect 2014 * immediately. 2015 */ 2016 void 2017 ahc_set_width(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2018 u_int width, u_int type, int paused __unused) 2019 { 2020 struct ahc_initiator_tinfo *tinfo; 2021 struct ahc_tmode_tstate *tstate; 2022 u_int oldwidth; 2023 int active; 2024 int update_needed; 2025 2026 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE; 2027 update_needed = 0; 2028 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 2029 devinfo->target, &tstate); 2030 2031 if ((type & AHC_TRANS_USER) != 0) 2032 tinfo->user.width = width; 2033 2034 if ((type & AHC_TRANS_GOAL) != 0) 2035 tinfo->goal.width = width; 2036 2037 oldwidth = tinfo->curr.width; 2038 if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) { 2039 u_int scsirate; 2040 2041 update_needed++; 2042 scsirate = tinfo->scsirate; 2043 scsirate &= ~WIDEXFER; 2044 if (width == MSG_EXT_WDTR_BUS_16_BIT) 2045 scsirate |= WIDEXFER; 2046 2047 tinfo->scsirate = scsirate; 2048 2049 if (active) 2050 ahc_outb(ahc, SCSIRATE, scsirate); 2051 2052 tinfo->curr.width = width; 2053 2054 ahc_send_async(ahc, devinfo->channel, devinfo->target, 2055 CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL); 2056 if (bootverbose) { 2057 printf("%s: target %d using %dbit transfers\n", 2058 ahc_name(ahc), devinfo->target, 2059 8 * (0x01 << width)); 2060 } 2061 } 2062 2063 update_needed += ahc_update_neg_request(ahc, devinfo, tstate, 2064 tinfo, AHC_NEG_TO_GOAL); 2065 if (update_needed) 2066 ahc_update_pending_scbs(ahc); 2067 } 2068 2069 /* 2070 * Update the current state of tagged queuing for a given target. 2071 */ 2072 void 2073 ahc_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2074 ahc_queue_alg alg) 2075 { 2076 ahc_platform_set_tags(ahc, devinfo, alg); 2077 } 2078 2079 /* 2080 * When the transfer settings for a connection change, update any 2081 * in-transit SCBs to contain the new data so the hardware will 2082 * be set correctly during future (re)selections. 2083 */ 2084 static void 2085 ahc_update_pending_scbs(struct ahc_softc *ahc) 2086 { 2087 struct scb *pending_scb; 2088 int pending_scb_count; 2089 int i; 2090 int paused; 2091 u_int saved_scbptr; 2092 2093 /* 2094 * Traverse the pending SCB list and ensure that all of the 2095 * SCBs there have the proper settings. 2096 */ 2097 pending_scb_count = 0; 2098 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2099 struct ahc_devinfo devinfo; 2100 struct hardware_scb *pending_hscb; 2101 struct ahc_initiator_tinfo *tinfo; 2102 struct ahc_tmode_tstate *tstate; 2103 2104 ahc_scb_devinfo(ahc, &devinfo, pending_scb); 2105 tinfo = ahc_fetch_transinfo(ahc, devinfo.channel, 2106 devinfo.our_scsiid, 2107 devinfo.target, &tstate); 2108 pending_hscb = pending_scb->hscb; 2109 pending_hscb->control &= ~ULTRAENB; 2110 if ((tstate->ultraenb & devinfo.target_mask) != 0) 2111 pending_hscb->control |= ULTRAENB; 2112 pending_hscb->scsirate = tinfo->scsirate; 2113 pending_hscb->scsioffset = tinfo->curr.offset; 2114 if ((tstate->auto_negotiate & devinfo.target_mask) == 0 2115 && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) { 2116 pending_scb->flags &= ~SCB_AUTO_NEGOTIATE; 2117 pending_hscb->control &= ~MK_MESSAGE; 2118 } 2119 ahc_sync_scb(ahc, pending_scb, 2120 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 2121 pending_scb_count++; 2122 } 2123 2124 if (pending_scb_count == 0) 2125 return; 2126 2127 if (ahc_is_paused(ahc)) { 2128 paused = 1; 2129 } else { 2130 paused = 0; 2131 ahc_pause(ahc); 2132 } 2133 2134 saved_scbptr = ahc_inb(ahc, SCBPTR); 2135 /* Ensure that the hscbs down on the card match the new information */ 2136 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 2137 struct hardware_scb *pending_hscb; 2138 u_int control; 2139 u_int scb_tag; 2140 2141 ahc_outb(ahc, SCBPTR, i); 2142 scb_tag = ahc_inb(ahc, SCB_TAG); 2143 pending_scb = ahc_lookup_scb(ahc, scb_tag); 2144 if (pending_scb == NULL) 2145 continue; 2146 2147 pending_hscb = pending_scb->hscb; 2148 control = ahc_inb(ahc, SCB_CONTROL); 2149 control &= ~(ULTRAENB|MK_MESSAGE); 2150 control |= pending_hscb->control & (ULTRAENB|MK_MESSAGE); 2151 ahc_outb(ahc, SCB_CONTROL, control); 2152 ahc_outb(ahc, SCB_SCSIRATE, pending_hscb->scsirate); 2153 ahc_outb(ahc, SCB_SCSIOFFSET, pending_hscb->scsioffset); 2154 } 2155 ahc_outb(ahc, SCBPTR, saved_scbptr); 2156 2157 if (paused == 0) 2158 ahc_unpause(ahc); 2159 } 2160 2161 /**************************** Pathing Information *****************************/ 2162 static void 2163 ahc_fetch_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 2164 { 2165 u_int saved_scsiid; 2166 role_t role; 2167 int our_id; 2168 2169 if (ahc_inb(ahc, SSTAT0) & TARGET) 2170 role = ROLE_TARGET; 2171 else 2172 role = ROLE_INITIATOR; 2173 2174 if (role == ROLE_TARGET 2175 && (ahc->features & AHC_MULTI_TID) != 0 2176 && (ahc_inb(ahc, SEQ_FLAGS) 2177 & (CMDPHASE_PENDING|TARG_CMD_PENDING|NO_DISCONNECT)) != 0) { 2178 /* We were selected, so pull our id from TARGIDIN */ 2179 our_id = ahc_inb(ahc, TARGIDIN) & OID; 2180 } else if ((ahc->features & AHC_ULTRA2) != 0) 2181 our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID; 2182 else 2183 our_id = ahc_inb(ahc, SCSIID) & OID; 2184 2185 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2186 ahc_compile_devinfo(devinfo, 2187 our_id, 2188 SCSIID_TARGET(ahc, saved_scsiid), 2189 ahc_inb(ahc, SAVED_LUN), 2190 SCSIID_CHANNEL(ahc, saved_scsiid), 2191 role); 2192 } 2193 2194 struct ahc_phase_table_entry* 2195 ahc_lookup_phase_entry(int phase) 2196 { 2197 struct ahc_phase_table_entry *entry; 2198 struct ahc_phase_table_entry *last_entry; 2199 2200 /* 2201 * num_phases doesn't include the default entry which 2202 * will be returned if the phase doesn't match. 2203 */ 2204 last_entry = &ahc_phase_table[num_phases]; 2205 for (entry = ahc_phase_table; entry < last_entry; entry++) { 2206 if (phase == entry->phase) 2207 break; 2208 } 2209 return (entry); 2210 } 2211 2212 void 2213 ahc_compile_devinfo(struct ahc_devinfo *devinfo, u_int our_id, u_int target, 2214 u_int lun, char channel, role_t role) 2215 { 2216 devinfo->our_scsiid = our_id; 2217 devinfo->target = target; 2218 devinfo->lun = lun; 2219 devinfo->target_offset = target; 2220 devinfo->channel = channel; 2221 devinfo->role = role; 2222 if (channel == 'B') 2223 devinfo->target_offset += 8; 2224 devinfo->target_mask = (0x01 << devinfo->target_offset); 2225 } 2226 2227 void 2228 ahc_print_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 2229 { 2230 printf("%s:%c:%d:%d: ", ahc_name(ahc), devinfo->channel, 2231 devinfo->target, devinfo->lun); 2232 } 2233 2234 static void 2235 ahc_scb_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2236 struct scb *scb) 2237 { 2238 role_t role; 2239 int our_id; 2240 2241 our_id = SCSIID_OUR_ID(scb->hscb->scsiid); 2242 role = ROLE_INITIATOR; 2243 if ((scb->flags & SCB_TARGET_SCB) != 0) 2244 role = ROLE_TARGET; 2245 ahc_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahc, scb), 2246 SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahc, scb), role); 2247 } 2248 2249 2250 /************************ Message Phase Processing ****************************/ 2251 static void 2252 ahc_assert_atn(struct ahc_softc *ahc) 2253 { 2254 u_int scsisigo; 2255 2256 scsisigo = ATNO; 2257 if ((ahc->features & AHC_DT) == 0) 2258 scsisigo |= ahc_inb(ahc, SCSISIGI); 2259 ahc_outb(ahc, SCSISIGO, scsisigo); 2260 } 2261 2262 /* 2263 * When an initiator transaction with the MK_MESSAGE flag either reconnects 2264 * or enters the initial message out phase, we are interrupted. Fill our 2265 * outgoing message buffer with the appropriate message and begin handing 2266 * the message phase(s) manually. 2267 */ 2268 static void 2269 ahc_setup_initiator_msgout(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2270 struct scb *scb) 2271 { 2272 /* 2273 * To facilitate adding multiple messages together, 2274 * each routine should increment the index and len 2275 * variables instead of setting them explicitly. 2276 */ 2277 ahc->msgout_index = 0; 2278 ahc->msgout_len = 0; 2279 2280 if ((scb->flags & SCB_DEVICE_RESET) == 0 2281 && ahc_inb(ahc, MSG_OUT) == MSG_IDENTIFYFLAG) { 2282 u_int identify_msg; 2283 2284 identify_msg = MSG_IDENTIFYFLAG | SCB_GET_LUN(scb); 2285 if ((scb->hscb->control & DISCENB) != 0) 2286 identify_msg |= MSG_IDENTIFY_DISCFLAG; 2287 ahc->msgout_buf[ahc->msgout_index++] = identify_msg; 2288 ahc->msgout_len++; 2289 2290 if ((scb->hscb->control & TAG_ENB) != 0) { 2291 ahc->msgout_buf[ahc->msgout_index++] = 2292 scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE); 2293 ahc->msgout_buf[ahc->msgout_index++] = scb->hscb->tag; 2294 ahc->msgout_len += 2; 2295 } 2296 } 2297 2298 if (scb->flags & SCB_DEVICE_RESET) { 2299 ahc->msgout_buf[ahc->msgout_index++] = MSG_BUS_DEV_RESET; 2300 ahc->msgout_len++; 2301 ahc_print_path(ahc, scb); 2302 printf("Bus Device Reset Message Sent\n"); 2303 /* 2304 * Clear our selection hardware in advance of 2305 * the busfree. We may have an entry in the waiting 2306 * Q for this target, and we don't want to go about 2307 * selecting while we handle the busfree and blow it 2308 * away. 2309 */ 2310 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); 2311 } else if ((scb->flags & SCB_ABORT) != 0) { 2312 if ((scb->hscb->control & TAG_ENB) != 0) 2313 ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT_TAG; 2314 else 2315 ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT; 2316 ahc->msgout_len++; 2317 ahc_print_path(ahc, scb); 2318 printf("Abort%s Message Sent\n", 2319 (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : ""); 2320 /* 2321 * Clear our selection hardware in advance of 2322 * the busfree. We may have an entry in the waiting 2323 * Q for this target, and we don't want to go about 2324 * selecting while we handle the busfree and blow it 2325 * away. 2326 */ 2327 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); 2328 } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) { 2329 ahc_build_transfer_msg(ahc, devinfo); 2330 } else { 2331 printf("ahc_intr: AWAITING_MSG for an SCB that " 2332 "does not have a waiting message\n"); 2333 printf("SCSIID = %x, target_mask = %x\n", scb->hscb->scsiid, 2334 devinfo->target_mask); 2335 panic("SCB = %d, SCB Control = %x, MSG_OUT = %x " 2336 "SCB flags = %x", scb->hscb->tag, scb->hscb->control, 2337 ahc_inb(ahc, MSG_OUT), scb->flags); 2338 } 2339 2340 /* 2341 * Clear the MK_MESSAGE flag from the SCB so we aren't 2342 * asked to send this message again. 2343 */ 2344 ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL) & ~MK_MESSAGE); 2345 scb->hscb->control &= ~MK_MESSAGE; 2346 ahc->msgout_index = 0; 2347 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 2348 } 2349 2350 /* 2351 * Build an appropriate transfer negotiation message for the 2352 * currently active target. 2353 */ 2354 static void 2355 ahc_build_transfer_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 2356 { 2357 /* 2358 * We need to initiate transfer negotiations. 2359 * If our current and goal settings are identical, 2360 * we want to renegotiate due to a check condition. 2361 */ 2362 struct ahc_initiator_tinfo *tinfo; 2363 struct ahc_tmode_tstate *tstate; 2364 struct ahc_syncrate *rate; 2365 int dowide; 2366 int dosync; 2367 int doppr; 2368 u_int period; 2369 u_int ppr_options; 2370 u_int offset; 2371 2372 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 2373 devinfo->target, &tstate); 2374 /* 2375 * Filter our period based on the current connection. 2376 * If we can't perform DT transfers on this segment (not in LVD 2377 * mode for instance), then our decision to issue a PPR message 2378 * may change. 2379 */ 2380 period = tinfo->goal.period; 2381 ppr_options = tinfo->goal.ppr_options; 2382 /* Target initiated PPR is not allowed in the SCSI spec */ 2383 if (devinfo->role == ROLE_TARGET) 2384 ppr_options = 0; 2385 rate = ahc_devlimited_syncrate(ahc, tinfo, &period, 2386 &ppr_options, devinfo->role); 2387 dowide = tinfo->curr.width != tinfo->goal.width; 2388 dosync = tinfo->curr.period != period; 2389 /* 2390 * Only use PPR if we have options that need it, even if the device 2391 * claims to support it. There might be an expander in the way 2392 * that doesn't. 2393 */ 2394 doppr = ppr_options != 0; 2395 2396 if (!dowide && !dosync && !doppr) { 2397 dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT; 2398 dosync = tinfo->goal.offset != 0; 2399 } 2400 2401 if (!dowide && !dosync && !doppr) { 2402 /* 2403 * Force async with a WDTR message if we have a wide bus, 2404 * or just issue an SDTR with a 0 offset. 2405 */ 2406 if ((ahc->features & AHC_WIDE) != 0) 2407 dowide = 1; 2408 else 2409 dosync = 1; 2410 2411 if (bootverbose) { 2412 ahc_print_devinfo(ahc, devinfo); 2413 printf("Ensuring async\n"); 2414 } 2415 } 2416 2417 /* Target initiated PPR is not allowed in the SCSI spec */ 2418 if (devinfo->role == ROLE_TARGET) 2419 doppr = 0; 2420 2421 /* 2422 * Both the PPR message and SDTR message require the 2423 * goal syncrate to be limited to what the target device 2424 * is capable of handling (based on whether an LVD->SE 2425 * expander is on the bus), so combine these two cases. 2426 * Regardless, guarantee that if we are using WDTR and SDTR 2427 * messages that WDTR comes first. 2428 */ 2429 if (doppr || (dosync && !dowide)) { 2430 2431 offset = tinfo->goal.offset; 2432 ahc_validate_offset(ahc, tinfo, rate, &offset, 2433 doppr ? tinfo->goal.width 2434 : tinfo->curr.width, 2435 devinfo->role); 2436 if (doppr) { 2437 ahc_construct_ppr(ahc, devinfo, period, offset, 2438 tinfo->goal.width, ppr_options); 2439 } else { 2440 ahc_construct_sdtr(ahc, devinfo, period, offset); 2441 } 2442 } else { 2443 ahc_construct_wdtr(ahc, devinfo, tinfo->goal.width); 2444 } 2445 } 2446 2447 /* 2448 * Build a synchronous negotiation message in our message 2449 * buffer based on the input parameters. 2450 */ 2451 static void 2452 ahc_construct_sdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2453 u_int period, u_int offset) 2454 { 2455 if (offset == 0) 2456 period = AHC_ASYNC_XFER_PERIOD; 2457 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED; 2458 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_SDTR_LEN; 2459 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_SDTR; 2460 ahc->msgout_buf[ahc->msgout_index++] = period; 2461 ahc->msgout_buf[ahc->msgout_index++] = offset; 2462 ahc->msgout_len += 5; 2463 if (bootverbose) { 2464 printf("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n", 2465 ahc_name(ahc), devinfo->channel, devinfo->target, 2466 devinfo->lun, period, offset); 2467 } 2468 } 2469 2470 /* 2471 * Build a wide negotiation message in our message 2472 * buffer based on the input parameters. 2473 */ 2474 static void 2475 ahc_construct_wdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2476 u_int bus_width) 2477 { 2478 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED; 2479 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_WDTR_LEN; 2480 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_WDTR; 2481 ahc->msgout_buf[ahc->msgout_index++] = bus_width; 2482 ahc->msgout_len += 4; 2483 if (bootverbose) { 2484 printf("(%s:%c:%d:%d): Sending WDTR %x\n", 2485 ahc_name(ahc), devinfo->channel, devinfo->target, 2486 devinfo->lun, bus_width); 2487 } 2488 } 2489 2490 /* 2491 * Build a parallel protocol request message in our message 2492 * buffer based on the input parameters. 2493 */ 2494 static void 2495 ahc_construct_ppr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2496 u_int period, u_int offset, u_int bus_width, 2497 u_int ppr_options) 2498 { 2499 if (offset == 0) 2500 period = AHC_ASYNC_XFER_PERIOD; 2501 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED; 2502 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_PPR_LEN; 2503 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_PPR; 2504 ahc->msgout_buf[ahc->msgout_index++] = period; 2505 ahc->msgout_buf[ahc->msgout_index++] = 0; 2506 ahc->msgout_buf[ahc->msgout_index++] = offset; 2507 ahc->msgout_buf[ahc->msgout_index++] = bus_width; 2508 ahc->msgout_buf[ahc->msgout_index++] = ppr_options; 2509 ahc->msgout_len += 8; 2510 if (bootverbose) { 2511 printf("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, " 2512 "offset %x, ppr_options %x\n", ahc_name(ahc), 2513 devinfo->channel, devinfo->target, devinfo->lun, 2514 bus_width, period, offset, ppr_options); 2515 } 2516 } 2517 2518 /* 2519 * Clear any active message state. 2520 */ 2521 static void 2522 ahc_clear_msg_state(struct ahc_softc *ahc) 2523 { 2524 ahc->msgout_len = 0; 2525 ahc->msgin_index = 0; 2526 ahc->msg_type = MSG_TYPE_NONE; 2527 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0) { 2528 /* 2529 * The target didn't care to respond to our 2530 * message request, so clear ATN. 2531 */ 2532 ahc_outb(ahc, CLRSINT1, CLRATNO); 2533 } 2534 ahc_outb(ahc, MSG_OUT, MSG_NOOP); 2535 ahc_outb(ahc, SEQ_FLAGS2, 2536 ahc_inb(ahc, SEQ_FLAGS2) & ~TARGET_MSG_PENDING); 2537 } 2538 2539 static void 2540 ahc_handle_proto_violation(struct ahc_softc *ahc) 2541 { 2542 struct ahc_devinfo devinfo; 2543 struct scb *scb; 2544 u_int scbid; 2545 u_int seq_flags; 2546 u_int curphase; 2547 u_int lastphase; 2548 int found; 2549 2550 ahc_fetch_devinfo(ahc, &devinfo); 2551 scbid = ahc_inb(ahc, SCB_TAG); 2552 scb = ahc_lookup_scb(ahc, scbid); 2553 seq_flags = ahc_inb(ahc, SEQ_FLAGS); 2554 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 2555 lastphase = ahc_inb(ahc, LASTPHASE); 2556 if ((seq_flags & NOT_IDENTIFIED) != 0) { 2557 2558 /* 2559 * The reconnecting target either did not send an 2560 * identify message, or did, but we didn't find an SCB 2561 * to match. 2562 */ 2563 ahc_print_devinfo(ahc, &devinfo); 2564 printf("Target did not send an IDENTIFY message. " 2565 "LASTPHASE = 0x%x.\n", lastphase); 2566 scb = NULL; 2567 } else if (scb == NULL) { 2568 /* 2569 * We don't seem to have an SCB active for this 2570 * transaction. Print an error and reset the bus. 2571 */ 2572 ahc_print_devinfo(ahc, &devinfo); 2573 printf("No SCB found during protocol violation\n"); 2574 goto proto_violation_reset; 2575 } else { 2576 ahc_set_transaction_status(scb, CAM_SEQUENCE_FAIL); 2577 if ((seq_flags & NO_CDB_SENT) != 0) { 2578 ahc_print_path(ahc, scb); 2579 printf("No or incomplete CDB sent to device.\n"); 2580 } else if ((ahc_inb(ahc, SCB_CONTROL) & STATUS_RCVD) == 0) { 2581 /* 2582 * The target never bothered to provide status to 2583 * us prior to completing the command. Since we don't 2584 * know the disposition of this command, we must attempt 2585 * to abort it. Assert ATN and prepare to send an abort 2586 * message. 2587 */ 2588 ahc_print_path(ahc, scb); 2589 printf("Completed command without status.\n"); 2590 } else { 2591 ahc_print_path(ahc, scb); 2592 printf("Unknown protocol violation.\n"); 2593 ahc_dump_card_state(ahc); 2594 } 2595 } 2596 if ((lastphase & ~P_DATAIN_DT) == 0 2597 || lastphase == P_COMMAND) { 2598 proto_violation_reset: 2599 /* 2600 * Target either went directly to data/command 2601 * phase or didn't respond to our ATN. 2602 * The only safe thing to do is to blow 2603 * it away with a bus reset. 2604 */ 2605 found = ahc_reset_channel(ahc, 'A', TRUE); 2606 printf("%s: Issued Channel %c Bus Reset. " 2607 "%d SCBs aborted\n", ahc_name(ahc), 'A', found); 2608 } else { 2609 /* 2610 * Leave the selection hardware off in case 2611 * this abort attempt will affect yet to 2612 * be sent commands. 2613 */ 2614 ahc_outb(ahc, SCSISEQ, 2615 ahc_inb(ahc, SCSISEQ) & ~ENSELO); 2616 ahc_assert_atn(ahc); 2617 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2618 if (scb == NULL) { 2619 ahc_print_devinfo(ahc, &devinfo); 2620 ahc->msgout_buf[0] = MSG_ABORT_TASK; 2621 ahc->msgout_len = 1; 2622 ahc->msgout_index = 0; 2623 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 2624 } else { 2625 ahc_print_path(ahc, scb); 2626 scb->flags |= SCB_ABORT; 2627 } 2628 printf("Protocol violation %s. Attempting to abort.\n", 2629 ahc_lookup_phase_entry(curphase)->phasemsg); 2630 } 2631 } 2632 2633 /* 2634 * Manual message loop handler. 2635 */ 2636 static void 2637 ahc_handle_message_phase(struct ahc_softc *ahc) 2638 { 2639 struct ahc_devinfo devinfo; 2640 u_int bus_phase; 2641 int end_session; 2642 2643 ahc_fetch_devinfo(ahc, &devinfo); 2644 end_session = FALSE; 2645 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 2646 2647 reswitch: 2648 switch (ahc->msg_type) { 2649 case MSG_TYPE_INITIATOR_MSGOUT: 2650 { 2651 int lastbyte; 2652 int phasemis; 2653 int msgdone; 2654 2655 if (ahc->msgout_len == 0) 2656 panic("HOST_MSG_LOOP interrupt with no active message"); 2657 2658 #ifdef AHC_DEBUG 2659 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2660 ahc_print_devinfo(ahc, &devinfo); 2661 printf("INITIATOR_MSG_OUT"); 2662 } 2663 #endif 2664 phasemis = bus_phase != P_MESGOUT; 2665 if (phasemis) { 2666 #ifdef AHC_DEBUG 2667 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2668 printf(" PHASEMIS %s\n", 2669 ahc_lookup_phase_entry(bus_phase) 2670 ->phasemsg); 2671 } 2672 #endif 2673 if (bus_phase == P_MESGIN) { 2674 /* 2675 * Change gears and see if 2676 * this messages is of interest to 2677 * us or should be passed back to 2678 * the sequencer. 2679 */ 2680 ahc_outb(ahc, CLRSINT1, CLRATNO); 2681 ahc->send_msg_perror = FALSE; 2682 ahc->msg_type = MSG_TYPE_INITIATOR_MSGIN; 2683 ahc->msgin_index = 0; 2684 goto reswitch; 2685 } 2686 end_session = TRUE; 2687 break; 2688 } 2689 2690 if (ahc->send_msg_perror) { 2691 ahc_outb(ahc, CLRSINT1, CLRATNO); 2692 ahc_outb(ahc, CLRSINT1, CLRREQINIT); 2693 #ifdef AHC_DEBUG 2694 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 2695 printf(" byte 0x%x\n", ahc->send_msg_perror); 2696 #endif 2697 ahc_outb(ahc, SCSIDATL, MSG_PARITY_ERROR); 2698 break; 2699 } 2700 2701 msgdone = ahc->msgout_index == ahc->msgout_len; 2702 if (msgdone) { 2703 /* 2704 * The target has requested a retry. 2705 * Re-assert ATN, reset our message index to 2706 * 0, and try again. 2707 */ 2708 ahc->msgout_index = 0; 2709 ahc_assert_atn(ahc); 2710 } 2711 2712 lastbyte = ahc->msgout_index == (ahc->msgout_len - 1); 2713 if (lastbyte) { 2714 /* Last byte is signified by dropping ATN */ 2715 ahc_outb(ahc, CLRSINT1, CLRATNO); 2716 } 2717 2718 /* 2719 * Clear our interrupt status and present 2720 * the next byte on the bus. 2721 */ 2722 ahc_outb(ahc, CLRSINT1, CLRREQINIT); 2723 #ifdef AHC_DEBUG 2724 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 2725 printf(" byte 0x%x\n", 2726 ahc->msgout_buf[ahc->msgout_index]); 2727 #endif 2728 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]); 2729 break; 2730 } 2731 case MSG_TYPE_INITIATOR_MSGIN: 2732 { 2733 int phasemis; 2734 int message_done; 2735 2736 #ifdef AHC_DEBUG 2737 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2738 ahc_print_devinfo(ahc, &devinfo); 2739 printf("INITIATOR_MSG_IN"); 2740 } 2741 #endif 2742 phasemis = bus_phase != P_MESGIN; 2743 if (phasemis) { 2744 #ifdef AHC_DEBUG 2745 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2746 printf(" PHASEMIS %s\n", 2747 ahc_lookup_phase_entry(bus_phase) 2748 ->phasemsg); 2749 } 2750 #endif 2751 ahc->msgin_index = 0; 2752 if (bus_phase == P_MESGOUT 2753 && (ahc->send_msg_perror == TRUE 2754 || (ahc->msgout_len != 0 2755 && ahc->msgout_index == 0))) { 2756 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 2757 goto reswitch; 2758 } 2759 end_session = TRUE; 2760 break; 2761 } 2762 2763 /* Pull the byte in without acking it */ 2764 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIBUSL); 2765 #ifdef AHC_DEBUG 2766 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 2767 printf(" byte 0x%x\n", 2768 ahc->msgin_buf[ahc->msgin_index]); 2769 #endif 2770 2771 message_done = ahc_parse_msg(ahc, &devinfo); 2772 2773 if (message_done) { 2774 /* 2775 * Clear our incoming message buffer in case there 2776 * is another message following this one. 2777 */ 2778 ahc->msgin_index = 0; 2779 2780 /* 2781 * If this message illicited a response, 2782 * assert ATN so the target takes us to the 2783 * message out phase. 2784 */ 2785 if (ahc->msgout_len != 0) { 2786 #ifdef AHC_DEBUG 2787 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 2788 ahc_print_devinfo(ahc, &devinfo); 2789 printf("Asserting ATN for response\n"); 2790 } 2791 #endif 2792 ahc_assert_atn(ahc); 2793 } 2794 } else 2795 ahc->msgin_index++; 2796 2797 if (message_done == MSGLOOP_TERMINATED) { 2798 end_session = TRUE; 2799 } else { 2800 /* Ack the byte */ 2801 ahc_outb(ahc, CLRSINT1, CLRREQINIT); 2802 (void)ahc_inb(ahc, SCSIDATL); 2803 } 2804 break; 2805 } 2806 case MSG_TYPE_TARGET_MSGIN: 2807 { 2808 int msgdone; 2809 int msgout_request; 2810 2811 if (ahc->msgout_len == 0) 2812 panic("Target MSGIN with no active message"); 2813 2814 /* 2815 * If we interrupted a mesgout session, the initiator 2816 * will not know this until our first REQ. So, we 2817 * only honor mesgout requests after we've sent our 2818 * first byte. 2819 */ 2820 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0 2821 && ahc->msgout_index > 0) 2822 msgout_request = TRUE; 2823 else 2824 msgout_request = FALSE; 2825 2826 if (msgout_request) { 2827 2828 /* 2829 * Change gears and see if 2830 * this messages is of interest to 2831 * us or should be passed back to 2832 * the sequencer. 2833 */ 2834 ahc->msg_type = MSG_TYPE_TARGET_MSGOUT; 2835 ahc_outb(ahc, SCSISIGO, P_MESGOUT | BSYO); 2836 ahc->msgin_index = 0; 2837 /* Dummy read to REQ for first byte */ 2838 (void)ahc_inb(ahc, SCSIDATL); 2839 ahc_outb(ahc, SXFRCTL0, 2840 ahc_inb(ahc, SXFRCTL0) | SPIOEN); 2841 break; 2842 } 2843 2844 msgdone = ahc->msgout_index == ahc->msgout_len; 2845 if (msgdone) { 2846 ahc_outb(ahc, SXFRCTL0, 2847 ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); 2848 end_session = TRUE; 2849 break; 2850 } 2851 2852 /* 2853 * Present the next byte on the bus. 2854 */ 2855 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN); 2856 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]); 2857 break; 2858 } 2859 case MSG_TYPE_TARGET_MSGOUT: 2860 { 2861 int lastbyte; 2862 int msgdone; 2863 2864 /* 2865 * The initiator signals that this is 2866 * the last byte by dropping ATN. 2867 */ 2868 lastbyte = (ahc_inb(ahc, SCSISIGI) & ATNI) == 0; 2869 2870 /* 2871 * Read the latched byte, but turn off SPIOEN first 2872 * so that we don't inadvertently cause a REQ for the 2873 * next byte. 2874 */ 2875 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); 2876 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIDATL); 2877 msgdone = ahc_parse_msg(ahc, &devinfo); 2878 if (msgdone == MSGLOOP_TERMINATED) { 2879 /* 2880 * The message is *really* done in that it caused 2881 * us to go to bus free. The sequencer has already 2882 * been reset at this point, so pull the ejection 2883 * handle. 2884 */ 2885 return; 2886 } 2887 2888 ahc->msgin_index++; 2889 2890 /* 2891 * XXX Read spec about initiator dropping ATN too soon 2892 * and use msgdone to detect it. 2893 */ 2894 if (msgdone == MSGLOOP_MSGCOMPLETE) { 2895 ahc->msgin_index = 0; 2896 2897 /* 2898 * If this message illicited a response, transition 2899 * to the Message in phase and send it. 2900 */ 2901 if (ahc->msgout_len != 0) { 2902 ahc_outb(ahc, SCSISIGO, P_MESGIN | BSYO); 2903 ahc_outb(ahc, SXFRCTL0, 2904 ahc_inb(ahc, SXFRCTL0) | SPIOEN); 2905 ahc->msg_type = MSG_TYPE_TARGET_MSGIN; 2906 ahc->msgin_index = 0; 2907 break; 2908 } 2909 } 2910 2911 if (lastbyte) 2912 end_session = TRUE; 2913 else { 2914 /* Ask for the next byte. */ 2915 ahc_outb(ahc, SXFRCTL0, 2916 ahc_inb(ahc, SXFRCTL0) | SPIOEN); 2917 } 2918 2919 break; 2920 } 2921 default: 2922 panic("Unknown REQINIT message type"); 2923 } 2924 2925 if (end_session) { 2926 ahc_clear_msg_state(ahc); 2927 ahc_outb(ahc, RETURN_1, EXIT_MSG_LOOP); 2928 } else 2929 ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP); 2930 } 2931 2932 /* 2933 * See if we sent a particular extended message to the target. 2934 * If "full" is true, return true only if the target saw the full 2935 * message. If "full" is false, return true if the target saw at 2936 * least the first byte of the message. 2937 */ 2938 static int 2939 ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, u_int msgval, int full) 2940 { 2941 int found; 2942 u_int index; 2943 2944 found = FALSE; 2945 index = 0; 2946 2947 while (index < ahc->msgout_len) { 2948 if (ahc->msgout_buf[index] == MSG_EXTENDED) { 2949 u_int end_index; 2950 2951 end_index = index + 1 + ahc->msgout_buf[index + 1]; 2952 if (ahc->msgout_buf[index+2] == msgval 2953 && type == AHCMSG_EXT) { 2954 2955 if (full) { 2956 if (ahc->msgout_index > end_index) 2957 found = TRUE; 2958 } else if (ahc->msgout_index > index) 2959 found = TRUE; 2960 } 2961 index = end_index; 2962 } else if (ahc->msgout_buf[index] >= MSG_SIMPLE_TASK 2963 && ahc->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) { 2964 2965 /* Skip tag type and tag id or residue param*/ 2966 index += 2; 2967 } else { 2968 /* Single byte message */ 2969 if (type == AHCMSG_1B 2970 && ahc->msgout_buf[index] == msgval 2971 && ahc->msgout_index > index) 2972 found = TRUE; 2973 index++; 2974 } 2975 2976 if (found) 2977 break; 2978 } 2979 return (found); 2980 } 2981 2982 /* 2983 * Wait for a complete incoming message, parse it, and respond accordingly. 2984 */ 2985 static int 2986 ahc_parse_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 2987 { 2988 struct ahc_initiator_tinfo *tinfo; 2989 struct ahc_tmode_tstate *tstate; 2990 int reject; 2991 int done; 2992 int response; 2993 u_int targ_scsirate; 2994 2995 done = MSGLOOP_IN_PROG; 2996 response = FALSE; 2997 reject = FALSE; 2998 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 2999 devinfo->target, &tstate); 3000 targ_scsirate = tinfo->scsirate; 3001 3002 /* 3003 * Parse as much of the message as is available, 3004 * rejecting it if we don't support it. When 3005 * the entire message is available and has been 3006 * handled, return MSGLOOP_MSGCOMPLETE, indicating 3007 * that we have parsed an entire message. 3008 * 3009 * In the case of extended messages, we accept the length 3010 * byte outright and perform more checking once we know the 3011 * extended message type. 3012 */ 3013 switch (ahc->msgin_buf[0]) { 3014 case MSG_DISCONNECT: 3015 case MSG_SAVEDATAPOINTER: 3016 case MSG_CMDCOMPLETE: 3017 case MSG_RESTOREPOINTERS: 3018 case MSG_IGN_WIDE_RESIDUE: 3019 /* 3020 * End our message loop as these are messages 3021 * the sequencer handles on its own. 3022 */ 3023 done = MSGLOOP_TERMINATED; 3024 break; 3025 case MSG_MESSAGE_REJECT: 3026 response = ahc_handle_msg_reject(ahc, devinfo); 3027 /* FALLTHROUGH */ 3028 case MSG_NOOP: 3029 done = MSGLOOP_MSGCOMPLETE; 3030 break; 3031 case MSG_EXTENDED: 3032 { 3033 /* Wait for enough of the message to begin validation */ 3034 if (ahc->msgin_index < 2) 3035 break; 3036 switch (ahc->msgin_buf[2]) { 3037 case MSG_EXT_SDTR: 3038 { 3039 struct ahc_syncrate *syncrate; 3040 u_int period; 3041 u_int ppr_options; 3042 u_int offset; 3043 u_int saved_offset; 3044 3045 if (ahc->msgin_buf[1] != MSG_EXT_SDTR_LEN) { 3046 reject = TRUE; 3047 break; 3048 } 3049 3050 /* 3051 * Wait until we have both args before validating 3052 * and acting on this message. 3053 * 3054 * Add one to MSG_EXT_SDTR_LEN to account for 3055 * the extended message preamble. 3056 */ 3057 if (ahc->msgin_index < (MSG_EXT_SDTR_LEN + 1)) 3058 break; 3059 3060 period = ahc->msgin_buf[3]; 3061 ppr_options = 0; 3062 saved_offset = offset = ahc->msgin_buf[4]; 3063 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period, 3064 &ppr_options, 3065 devinfo->role); 3066 ahc_validate_offset(ahc, tinfo, syncrate, &offset, 3067 targ_scsirate & WIDEXFER, 3068 devinfo->role); 3069 if (bootverbose) { 3070 printf("(%s:%c:%d:%d): Received " 3071 "SDTR period %x, offset %x\n\t" 3072 "Filtered to period %x, offset %x\n", 3073 ahc_name(ahc), devinfo->channel, 3074 devinfo->target, devinfo->lun, 3075 ahc->msgin_buf[3], saved_offset, 3076 period, offset); 3077 } 3078 ahc_set_syncrate(ahc, devinfo, 3079 syncrate, period, 3080 offset, ppr_options, 3081 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3082 /*paused*/TRUE); 3083 3084 /* 3085 * See if we initiated Sync Negotiation 3086 * and didn't have to fall down to async 3087 * transfers. 3088 */ 3089 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, TRUE)) { 3090 /* We started it */ 3091 if (saved_offset != offset) { 3092 /* Went too low - force async */ 3093 reject = TRUE; 3094 } 3095 } else { 3096 /* 3097 * Send our own SDTR in reply 3098 */ 3099 if (bootverbose 3100 && devinfo->role == ROLE_INITIATOR) { 3101 printf("(%s:%c:%d:%d): Target " 3102 "Initiated SDTR\n", 3103 ahc_name(ahc), devinfo->channel, 3104 devinfo->target, devinfo->lun); 3105 } 3106 ahc->msgout_index = 0; 3107 ahc->msgout_len = 0; 3108 ahc_construct_sdtr(ahc, devinfo, 3109 period, offset); 3110 ahc->msgout_index = 0; 3111 response = TRUE; 3112 } 3113 done = MSGLOOP_MSGCOMPLETE; 3114 break; 3115 } 3116 case MSG_EXT_WDTR: 3117 { 3118 u_int bus_width; 3119 u_int saved_width; 3120 u_int sending_reply; 3121 3122 sending_reply = FALSE; 3123 if (ahc->msgin_buf[1] != MSG_EXT_WDTR_LEN) { 3124 reject = TRUE; 3125 break; 3126 } 3127 3128 /* 3129 * Wait until we have our arg before validating 3130 * and acting on this message. 3131 * 3132 * Add one to MSG_EXT_WDTR_LEN to account for 3133 * the extended message preamble. 3134 */ 3135 if (ahc->msgin_index < (MSG_EXT_WDTR_LEN + 1)) 3136 break; 3137 3138 bus_width = ahc->msgin_buf[3]; 3139 saved_width = bus_width; 3140 ahc_validate_width(ahc, tinfo, &bus_width, 3141 devinfo->role); 3142 if (bootverbose) { 3143 printf("(%s:%c:%d:%d): Received WDTR " 3144 "%x filtered to %x\n", 3145 ahc_name(ahc), devinfo->channel, 3146 devinfo->target, devinfo->lun, 3147 saved_width, bus_width); 3148 } 3149 3150 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, TRUE)) { 3151 /* 3152 * Don't send a WDTR back to the 3153 * target, since we asked first. 3154 * If the width went higher than our 3155 * request, reject it. 3156 */ 3157 if (saved_width > bus_width) { 3158 reject = TRUE; 3159 printf("(%s:%c:%d:%d): requested %dBit " 3160 "transfers. Rejecting...\n", 3161 ahc_name(ahc), devinfo->channel, 3162 devinfo->target, devinfo->lun, 3163 8 * (0x01 << bus_width)); 3164 bus_width = 0; 3165 } 3166 } else { 3167 /* 3168 * Send our own WDTR in reply 3169 */ 3170 if (bootverbose 3171 && devinfo->role == ROLE_INITIATOR) { 3172 printf("(%s:%c:%d:%d): Target " 3173 "Initiated WDTR\n", 3174 ahc_name(ahc), devinfo->channel, 3175 devinfo->target, devinfo->lun); 3176 } 3177 ahc->msgout_index = 0; 3178 ahc->msgout_len = 0; 3179 ahc_construct_wdtr(ahc, devinfo, bus_width); 3180 ahc->msgout_index = 0; 3181 response = TRUE; 3182 sending_reply = TRUE; 3183 } 3184 ahc_set_width(ahc, devinfo, bus_width, 3185 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3186 /*paused*/TRUE); 3187 /* After a wide message, we are async */ 3188 ahc_set_syncrate(ahc, devinfo, 3189 /*syncrate*/NULL, /*period*/0, 3190 /*offset*/0, /*ppr_options*/0, 3191 AHC_TRANS_ACTIVE, /*paused*/TRUE); 3192 if (sending_reply == FALSE && reject == FALSE) { 3193 3194 if (tinfo->goal.offset) { 3195 ahc->msgout_index = 0; 3196 ahc->msgout_len = 0; 3197 ahc_build_transfer_msg(ahc, devinfo); 3198 ahc->msgout_index = 0; 3199 response = TRUE; 3200 } 3201 } 3202 done = MSGLOOP_MSGCOMPLETE; 3203 break; 3204 } 3205 case MSG_EXT_PPR: 3206 { 3207 struct ahc_syncrate *syncrate; 3208 u_int period; 3209 u_int offset; 3210 u_int bus_width; 3211 u_int ppr_options; 3212 u_int saved_width; 3213 u_int saved_offset; 3214 u_int saved_ppr_options; 3215 3216 if (ahc->msgin_buf[1] != MSG_EXT_PPR_LEN) { 3217 reject = TRUE; 3218 break; 3219 } 3220 3221 /* 3222 * Wait until we have all args before validating 3223 * and acting on this message. 3224 * 3225 * Add one to MSG_EXT_PPR_LEN to account for 3226 * the extended message preamble. 3227 */ 3228 if (ahc->msgin_index < (MSG_EXT_PPR_LEN + 1)) 3229 break; 3230 3231 period = ahc->msgin_buf[3]; 3232 offset = ahc->msgin_buf[5]; 3233 bus_width = ahc->msgin_buf[6]; 3234 saved_width = bus_width; 3235 ppr_options = ahc->msgin_buf[7]; 3236 /* 3237 * According to the spec, a DT only 3238 * period factor with no DT option 3239 * set implies async. 3240 */ 3241 if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0 3242 && period == 9) 3243 offset = 0; 3244 saved_ppr_options = ppr_options; 3245 saved_offset = offset; 3246 3247 /* 3248 * Mask out any options we don't support 3249 * on any controller. Transfer options are 3250 * only available if we are negotiating wide. 3251 */ 3252 ppr_options &= MSG_EXT_PPR_DT_REQ; 3253 if (bus_width == 0) 3254 ppr_options = 0; 3255 3256 ahc_validate_width(ahc, tinfo, &bus_width, 3257 devinfo->role); 3258 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period, 3259 &ppr_options, 3260 devinfo->role); 3261 ahc_validate_offset(ahc, tinfo, syncrate, 3262 &offset, bus_width, 3263 devinfo->role); 3264 3265 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, TRUE)) { 3266 /* 3267 * If we are unable to do any of the 3268 * requested options (we went too low), 3269 * then we'll have to reject the message. 3270 */ 3271 if (saved_width > bus_width 3272 || saved_offset != offset 3273 || saved_ppr_options != ppr_options) { 3274 reject = TRUE; 3275 period = 0; 3276 offset = 0; 3277 bus_width = 0; 3278 ppr_options = 0; 3279 syncrate = NULL; 3280 } 3281 } else { 3282 if (devinfo->role != ROLE_TARGET) 3283 printf("(%s:%c:%d:%d): Target " 3284 "Initiated PPR\n", 3285 ahc_name(ahc), devinfo->channel, 3286 devinfo->target, devinfo->lun); 3287 else 3288 printf("(%s:%c:%d:%d): Initiator " 3289 "Initiated PPR\n", 3290 ahc_name(ahc), devinfo->channel, 3291 devinfo->target, devinfo->lun); 3292 ahc->msgout_index = 0; 3293 ahc->msgout_len = 0; 3294 ahc_construct_ppr(ahc, devinfo, period, offset, 3295 bus_width, ppr_options); 3296 ahc->msgout_index = 0; 3297 response = TRUE; 3298 } 3299 if (bootverbose) { 3300 printf("(%s:%c:%d:%d): Received PPR width %x, " 3301 "period %x, offset %x,options %x\n" 3302 "\tFiltered to width %x, period %x, " 3303 "offset %x, options %x\n", 3304 ahc_name(ahc), devinfo->channel, 3305 devinfo->target, devinfo->lun, 3306 saved_width, ahc->msgin_buf[3], 3307 saved_offset, saved_ppr_options, 3308 bus_width, period, offset, ppr_options); 3309 } 3310 ahc_set_width(ahc, devinfo, bus_width, 3311 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3312 /*paused*/TRUE); 3313 ahc_set_syncrate(ahc, devinfo, 3314 syncrate, period, 3315 offset, ppr_options, 3316 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3317 /*paused*/TRUE); 3318 done = MSGLOOP_MSGCOMPLETE; 3319 break; 3320 } 3321 default: 3322 /* Unknown extended message. Reject it. */ 3323 reject = TRUE; 3324 break; 3325 } 3326 break; 3327 } 3328 #ifdef AHC_TARGET_MODE 3329 case MSG_BUS_DEV_RESET: 3330 ahc_handle_devreset(ahc, devinfo, 3331 CAM_BDR_SENT, 3332 "Bus Device Reset Received", 3333 /*verbose_level*/0); 3334 ahc_restart(ahc); 3335 done = MSGLOOP_TERMINATED; 3336 break; 3337 case MSG_ABORT_TAG: 3338 case MSG_ABORT: 3339 case MSG_CLEAR_QUEUE: 3340 { 3341 int tag; 3342 3343 /* Target mode messages */ 3344 if (devinfo->role != ROLE_TARGET) { 3345 reject = TRUE; 3346 break; 3347 } 3348 tag = SCB_LIST_NULL; 3349 if (ahc->msgin_buf[0] == MSG_ABORT_TAG) 3350 tag = ahc_inb(ahc, INITIATOR_TAG); 3351 ahc_abort_scbs(ahc, devinfo->target, devinfo->channel, 3352 devinfo->lun, tag, ROLE_TARGET, 3353 CAM_REQ_ABORTED); 3354 3355 tstate = ahc->enabled_targets[devinfo->our_scsiid]; 3356 if (tstate != NULL) { 3357 struct ahc_tmode_lstate* lstate; 3358 3359 lstate = tstate->enabled_luns[devinfo->lun]; 3360 if (lstate != NULL) { 3361 ahc_queue_lstate_event(ahc, lstate, 3362 devinfo->our_scsiid, 3363 ahc->msgin_buf[0], 3364 /*arg*/tag); 3365 ahc_send_lstate_events(ahc, lstate); 3366 } 3367 } 3368 ahc_restart(ahc); 3369 done = MSGLOOP_TERMINATED; 3370 break; 3371 } 3372 #endif 3373 case MSG_TERM_IO_PROC: 3374 default: 3375 reject = TRUE; 3376 break; 3377 } 3378 3379 if (reject) { 3380 /* 3381 * Setup to reject the message. 3382 */ 3383 ahc->msgout_index = 0; 3384 ahc->msgout_len = 1; 3385 ahc->msgout_buf[0] = MSG_MESSAGE_REJECT; 3386 done = MSGLOOP_MSGCOMPLETE; 3387 response = TRUE; 3388 } 3389 3390 if (done != MSGLOOP_IN_PROG && !response) 3391 /* Clear the outgoing message buffer */ 3392 ahc->msgout_len = 0; 3393 3394 return (done); 3395 } 3396 3397 /* 3398 * Process a message reject message. 3399 */ 3400 static int 3401 ahc_handle_msg_reject(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 3402 { 3403 /* 3404 * What we care about here is if we had an 3405 * outstanding SDTR or WDTR message for this 3406 * target. If we did, this is a signal that 3407 * the target is refusing negotiation. 3408 */ 3409 struct scb *scb; 3410 struct ahc_initiator_tinfo *tinfo; 3411 struct ahc_tmode_tstate *tstate; 3412 u_int scb_index; 3413 u_int last_msg; 3414 int response = 0; 3415 3416 scb_index = ahc_inb(ahc, SCB_TAG); 3417 scb = ahc_lookup_scb(ahc, scb_index); 3418 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, 3419 devinfo->our_scsiid, 3420 devinfo->target, &tstate); 3421 /* Might be necessary */ 3422 last_msg = ahc_inb(ahc, LAST_MSG); 3423 3424 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, /*full*/FALSE)) { 3425 /* 3426 * Target does not support the PPR message. 3427 * Attempt to negotiate SPI-2 style. 3428 */ 3429 if (bootverbose) { 3430 printf("(%s:%c:%d:%d): PPR Rejected. " 3431 "Trying WDTR/SDTR\n", 3432 ahc_name(ahc), devinfo->channel, 3433 devinfo->target, devinfo->lun); 3434 } 3435 tinfo->goal.ppr_options = 0; 3436 tinfo->curr.transport_version = 2; 3437 tinfo->goal.transport_version = 2; 3438 ahc->msgout_index = 0; 3439 ahc->msgout_len = 0; 3440 ahc_build_transfer_msg(ahc, devinfo); 3441 ahc->msgout_index = 0; 3442 response = 1; 3443 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, /*full*/FALSE)) { 3444 3445 /* note 8bit xfers */ 3446 if (bootverbose) 3447 printf("(%s:%c:%d:%d): refuses WIDE negotiation. Using " 3448 "8bit transfers\n", ahc_name(ahc), 3449 devinfo->channel, devinfo->target, devinfo->lun); 3450 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT, 3451 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3452 /*paused*/TRUE); 3453 /* 3454 * No need to clear the sync rate. If the target 3455 * did not accept the command, our syncrate is 3456 * unaffected. If the target started the negotiation, 3457 * but rejected our response, we already cleared the 3458 * sync rate before sending our WDTR. 3459 */ 3460 if (tinfo->goal.offset != tinfo->curr.offset) { 3461 3462 /* Start the sync negotiation */ 3463 ahc->msgout_index = 0; 3464 ahc->msgout_len = 0; 3465 ahc_build_transfer_msg(ahc, devinfo); 3466 ahc->msgout_index = 0; 3467 response = 1; 3468 } 3469 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, /*full*/FALSE)) { 3470 /* note asynch xfers and clear flag */ 3471 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0, 3472 /*offset*/0, /*ppr_options*/0, 3473 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3474 /*paused*/TRUE); 3475 if (bootverbose) 3476 printf("(%s:%c:%d:%d): refuses synchronous negotiation." 3477 " Using asynchronous transfers\n", 3478 ahc_name(ahc), devinfo->channel, 3479 devinfo->target, devinfo->lun); 3480 } else if ((scb->hscb->control & MSG_SIMPLE_TASK) != 0) { 3481 int tag_type; 3482 int mask; 3483 3484 tag_type = (scb->hscb->control & MSG_SIMPLE_TASK); 3485 3486 if (tag_type == MSG_SIMPLE_TASK) { 3487 if (bootverbose) 3488 printf("(%s:%c:%d:%d): refuses tagged commands." 3489 " Performing non-tagged I/O\n", 3490 ahc_name(ahc), devinfo->channel, 3491 devinfo->target, devinfo->lun); 3492 ahc_set_tags(ahc, devinfo, AHC_QUEUE_NONE); 3493 mask = ~0x23; 3494 } else { 3495 if (bootverbose) 3496 printf("(%s:%c:%d:%d): refuses %s tagged " 3497 "commands. Performing simple queue " 3498 "tagged I/O only\n", 3499 ahc_name(ahc), devinfo->channel, 3500 devinfo->target, devinfo->lun, 3501 tag_type == MSG_ORDERED_TASK 3502 ? "ordered" : "head of queue"); 3503 ahc_set_tags(ahc, devinfo, AHC_QUEUE_BASIC); 3504 mask = ~0x03; 3505 } 3506 3507 /* 3508 * Resend the identify for this CCB as the target 3509 * may believe that the selection is invalid otherwise. 3510 */ 3511 ahc_outb(ahc, SCB_CONTROL, 3512 ahc_inb(ahc, SCB_CONTROL) & mask); 3513 scb->hscb->control &= mask; 3514 ahc_set_transaction_tag(scb, /*enabled*/FALSE, 3515 /*type*/MSG_SIMPLE_TASK); 3516 ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG); 3517 ahc_assert_atn(ahc); 3518 3519 /* 3520 * This transaction is now at the head of 3521 * the untagged queue for this target. 3522 */ 3523 if ((ahc->flags & AHC_SCB_BTT) == 0) { 3524 struct scb_tailq *untagged_q; 3525 3526 untagged_q = 3527 &(ahc->untagged_queues[devinfo->target_offset]); 3528 TAILQ_INSERT_HEAD(untagged_q, scb, links.tqe); 3529 scb->flags |= SCB_UNTAGGEDQ; 3530 } 3531 ahc_busy_tcl(ahc, BUILD_TCL(scb->hscb->scsiid, devinfo->lun), 3532 scb->hscb->tag); 3533 3534 /* 3535 * Requeue all tagged commands for this target 3536 * currently in our possession so they can be 3537 * converted to untagged commands. 3538 */ 3539 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb), 3540 SCB_GET_CHANNEL(ahc, scb), 3541 SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL, 3542 ROLE_INITIATOR, CAM_REQUEUE_REQ, 3543 SEARCH_COMPLETE); 3544 } else { 3545 /* 3546 * Otherwise, we ignore it. 3547 */ 3548 if (bootverbose) 3549 printf("%s:%c:%d: Message reject for %x -- ignored\n", 3550 ahc_name(ahc), devinfo->channel, devinfo->target, 3551 last_msg); 3552 } 3553 return (response); 3554 } 3555 3556 /* 3557 * Process an ingnore wide residue message. 3558 */ 3559 static void 3560 ahc_handle_ign_wide_residue(struct ahc_softc *ahc, 3561 struct ahc_devinfo *devinfo __unused) 3562 { 3563 u_int scb_index; 3564 struct scb *scb; 3565 3566 scb_index = ahc_inb(ahc, SCB_TAG); 3567 scb = ahc_lookup_scb(ahc, scb_index); 3568 /* 3569 * XXX Actually check data direction in the sequencer? 3570 * Perhaps add datadir to some spare bits in the hscb? 3571 */ 3572 if ((ahc_inb(ahc, SEQ_FLAGS) & DPHASE) == 0 3573 || ahc_get_transfer_dir(scb) != CAM_DIR_IN) { 3574 /* 3575 * Ignore the message if we haven't 3576 * seen an appropriate data phase yet. 3577 */ 3578 } else { 3579 /* 3580 * If the residual occurred on the last 3581 * transfer and the transfer request was 3582 * expected to end on an odd count, do 3583 * nothing. Otherwise, subtract a byte 3584 * and update the residual count accordingly. 3585 */ 3586 uint32_t sgptr; 3587 3588 sgptr = ahc_inb(ahc, SCB_RESIDUAL_SGPTR); 3589 if ((sgptr & SG_LIST_NULL) != 0 3590 && ahc_inb(ahc, DATA_COUNT_ODD) == 1) { 3591 /* 3592 * If the residual occurred on the last 3593 * transfer and the transfer request was 3594 * expected to end on an odd count, do 3595 * nothing. 3596 */ 3597 } else { 3598 struct ahc_dma_seg *sg; 3599 uint32_t data_cnt; 3600 uint32_t data_addr; 3601 uint32_t sglen; 3602 3603 /* Pull in the rest of the sgptr */ 3604 sgptr |= (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24) 3605 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16) 3606 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8); 3607 sgptr &= SG_PTR_MASK; 3608 data_cnt = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT+3) << 24) 3609 | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT+2) << 16) 3610 | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT+1) << 8) 3611 | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT)); 3612 3613 data_addr = (ahc_inb(ahc, SHADDR + 3) << 24) 3614 | (ahc_inb(ahc, SHADDR + 2) << 16) 3615 | (ahc_inb(ahc, SHADDR + 1) << 8) 3616 | (ahc_inb(ahc, SHADDR)); 3617 3618 data_cnt += 1; 3619 data_addr -= 1; 3620 3621 sg = ahc_sg_bus_to_virt(scb, sgptr); 3622 /* 3623 * The residual sg ptr points to the next S/G 3624 * to load so we must go back one. 3625 */ 3626 sg--; 3627 sglen = ahc_le32toh(sg->len) & AHC_SG_LEN_MASK; 3628 if (sg != scb->sg_list 3629 && sglen < (data_cnt & AHC_SG_LEN_MASK)) { 3630 3631 sg--; 3632 sglen = ahc_le32toh(sg->len); 3633 /* 3634 * Preserve High Address and SG_LIST bits 3635 * while setting the count to 1. 3636 */ 3637 data_cnt = 1 | (sglen & (~AHC_SG_LEN_MASK)); 3638 data_addr = ahc_le32toh(sg->addr) 3639 + (sglen & AHC_SG_LEN_MASK) - 1; 3640 3641 /* 3642 * Increment sg so it points to the 3643 * "next" sg. 3644 */ 3645 sg++; 3646 sgptr = ahc_sg_virt_to_bus(scb, sg); 3647 ahc_outb(ahc, SCB_RESIDUAL_SGPTR + 3, 3648 sgptr >> 24); 3649 ahc_outb(ahc, SCB_RESIDUAL_SGPTR + 2, 3650 sgptr >> 16); 3651 ahc_outb(ahc, SCB_RESIDUAL_SGPTR + 1, 3652 sgptr >> 8); 3653 ahc_outb(ahc, SCB_RESIDUAL_SGPTR, sgptr); 3654 } 3655 3656 ahc_outb(ahc, SCB_RESIDUAL_DATACNT + 3, data_cnt >> 24); 3657 ahc_outb(ahc, SCB_RESIDUAL_DATACNT + 2, data_cnt >> 16); 3658 ahc_outb(ahc, SCB_RESIDUAL_DATACNT + 1, data_cnt >> 8); 3659 ahc_outb(ahc, SCB_RESIDUAL_DATACNT, data_cnt); 3660 } 3661 } 3662 } 3663 3664 3665 /* 3666 * Reinitialize the data pointers for the active transfer 3667 * based on its current residual. 3668 */ 3669 static void 3670 ahc_reinitialize_dataptrs(struct ahc_softc *ahc) 3671 { 3672 struct scb *scb; 3673 struct ahc_dma_seg *sg; 3674 u_int scb_index; 3675 uint32_t sgptr; 3676 uint32_t resid; 3677 uint32_t dataptr; 3678 3679 scb_index = ahc_inb(ahc, SCB_TAG); 3680 scb = ahc_lookup_scb(ahc, scb_index); 3681 sgptr = (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24) 3682 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16) 3683 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8) 3684 | ahc_inb(ahc, SCB_RESIDUAL_SGPTR); 3685 3686 sgptr &= SG_PTR_MASK; 3687 sg = ahc_sg_bus_to_virt(scb, sgptr); 3688 3689 /* The residual sg_ptr always points to the next sg */ 3690 sg--; 3691 3692 resid = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 2) << 16) 3693 | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 1) << 8) 3694 | ahc_inb(ahc, SCB_RESIDUAL_DATACNT); 3695 3696 dataptr = ahc_le32toh(sg->addr) 3697 + (ahc_le32toh(sg->len) & AHC_SG_LEN_MASK) 3698 - resid; 3699 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) { 3700 u_int dscommand1; 3701 3702 dscommand1 = ahc_inb(ahc, DSCOMMAND1); 3703 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0); 3704 ahc_outb(ahc, HADDR, 3705 (ahc_le32toh(sg->len) >> 24) & SG_HIGH_ADDR_BITS); 3706 ahc_outb(ahc, DSCOMMAND1, dscommand1); 3707 } 3708 ahc_outb(ahc, HADDR + 3, dataptr >> 24); 3709 ahc_outb(ahc, HADDR + 2, dataptr >> 16); 3710 ahc_outb(ahc, HADDR + 1, dataptr >> 8); 3711 ahc_outb(ahc, HADDR, dataptr); 3712 ahc_outb(ahc, HCNT + 2, resid >> 16); 3713 ahc_outb(ahc, HCNT + 1, resid >> 8); 3714 ahc_outb(ahc, HCNT, resid); 3715 if ((ahc->features & AHC_ULTRA2) == 0) { 3716 ahc_outb(ahc, STCNT + 2, resid >> 16); 3717 ahc_outb(ahc, STCNT + 1, resid >> 8); 3718 ahc_outb(ahc, STCNT, resid); 3719 } 3720 } 3721 3722 /* 3723 * Handle the effects of issuing a bus device reset message. 3724 */ 3725 static void 3726 ahc_handle_devreset(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 3727 cam_status status, const char *message, int verbose_level) 3728 { 3729 #ifdef AHC_TARGET_MODE 3730 struct ahc_tmode_tstate* tstate; 3731 u_int lun; 3732 #endif 3733 int found; 3734 3735 found = ahc_abort_scbs(ahc, devinfo->target, devinfo->channel, 3736 CAM_LUN_WILDCARD, SCB_LIST_NULL, devinfo->role, 3737 status); 3738 3739 #ifdef AHC_TARGET_MODE 3740 /* 3741 * Send an immediate notify ccb to all target mord peripheral 3742 * drivers affected by this action. 3743 */ 3744 tstate = ahc->enabled_targets[devinfo->our_scsiid]; 3745 if (tstate != NULL) { 3746 for (lun = 0; lun < AHC_NUM_LUNS; lun++) { 3747 struct ahc_tmode_lstate* lstate; 3748 3749 lstate = tstate->enabled_luns[lun]; 3750 if (lstate == NULL) 3751 continue; 3752 3753 ahc_queue_lstate_event(ahc, lstate, devinfo->our_scsiid, 3754 MSG_BUS_DEV_RESET, /*arg*/0); 3755 ahc_send_lstate_events(ahc, lstate); 3756 } 3757 } 3758 #endif 3759 3760 /* 3761 * Go back to async/narrow transfers and renegotiate. 3762 */ 3763 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT, 3764 AHC_TRANS_CUR, /*paused*/TRUE); 3765 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, 3766 /*period*/0, /*offset*/0, /*ppr_options*/0, 3767 AHC_TRANS_CUR, /*paused*/TRUE); 3768 3769 ahc_send_async(ahc, devinfo->channel, devinfo->target, 3770 CAM_LUN_WILDCARD, AC_SENT_BDR, NULL); 3771 3772 if (message != NULL 3773 && (verbose_level <= bootverbose)) 3774 printf("%s: %s on %c:%d. %d SCBs aborted\n", ahc_name(ahc), 3775 message, devinfo->channel, devinfo->target, found); 3776 } 3777 3778 #ifdef AHC_TARGET_MODE 3779 static void 3780 ahc_setup_target_msgin(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 3781 struct scb *scb) 3782 { 3783 3784 /* 3785 * To facilitate adding multiple messages together, 3786 * each routine should increment the index and len 3787 * variables instead of setting them explicitly. 3788 */ 3789 ahc->msgout_index = 0; 3790 ahc->msgout_len = 0; 3791 3792 if (scb != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 0) 3793 ahc_build_transfer_msg(ahc, devinfo); 3794 else 3795 panic("ahc_intr: AWAITING target message with no message"); 3796 3797 ahc->msgout_index = 0; 3798 ahc->msg_type = MSG_TYPE_TARGET_MSGIN; 3799 } 3800 #endif 3801 3802 int 3803 ahc_softc_init(struct ahc_softc *ahc) 3804 { 3805 3806 /* The IRQMS bit is only valid on VL and EISA chips */ 3807 if ((ahc->chip & AHC_PCI) == 0) 3808 ahc->unpause = ahc_inb(ahc, HCNTRL) & IRQMS; 3809 else 3810 ahc->unpause = 0; 3811 ahc->pause = ahc->unpause | PAUSE; 3812 /* XXX The shared scb data stuff should be deprecated */ 3813 if (ahc->scb_data == NULL) { 3814 ahc->scb_data = malloc(sizeof(*ahc->scb_data), 3815 M_DEVBUF, M_NOWAIT); 3816 if (ahc->scb_data == NULL) 3817 return (ENOMEM); 3818 memset(ahc->scb_data, 0, sizeof(*ahc->scb_data)); 3819 } 3820 3821 return (0); 3822 } 3823 3824 void 3825 ahc_softc_insert(struct ahc_softc *ahc) 3826 { 3827 struct ahc_softc *list_ahc; 3828 3829 #if AHC_PCI_CONFIG > 0 3830 /* 3831 * Second Function PCI devices need to inherit some 3832 * settings from function 0. 3833 */ 3834 if ((ahc->chip & AHC_BUS_MASK) == AHC_PCI 3835 && (ahc->features & AHC_MULTI_FUNC) != 0) { 3836 TAILQ_FOREACH(list_ahc, &ahc_tailq, links) { 3837 ahc_dev_softc_t list_pci; 3838 ahc_dev_softc_t pci; 3839 3840 list_pci = list_ahc->dev_softc; 3841 pci = ahc->dev_softc; 3842 if (ahc_get_pci_slot(list_pci) == ahc_get_pci_slot(pci) 3843 && ahc_get_pci_bus(list_pci) == ahc_get_pci_bus(pci)) { 3844 struct ahc_softc *master; 3845 struct ahc_softc *slave; 3846 3847 if (ahc_get_pci_function(list_pci) == 0) { 3848 master = list_ahc; 3849 slave = ahc; 3850 } else { 3851 master = ahc; 3852 slave = list_ahc; 3853 } 3854 slave->flags &= ~AHC_BIOS_ENABLED; 3855 slave->flags |= 3856 master->flags & AHC_BIOS_ENABLED; 3857 slave->flags &= ~AHC_PRIMARY_CHANNEL; 3858 slave->flags |= 3859 master->flags & AHC_PRIMARY_CHANNEL; 3860 break; 3861 } 3862 } 3863 } 3864 #endif 3865 3866 /* 3867 * Insertion sort into our list of softcs. 3868 */ 3869 list_ahc = TAILQ_FIRST(&ahc_tailq); 3870 while (list_ahc != NULL 3871 && ahc_softc_comp(list_ahc, ahc) <= 0) 3872 list_ahc = TAILQ_NEXT(list_ahc, links); 3873 if (list_ahc != NULL) 3874 TAILQ_INSERT_BEFORE(list_ahc, ahc, links); 3875 else 3876 TAILQ_INSERT_TAIL(&ahc_tailq, ahc, links); 3877 ahc->init_level++; 3878 } 3879 3880 /* 3881 * Verify that the passed in softc pointer is for a 3882 * controller that is still configured. 3883 */ 3884 struct ahc_softc * 3885 ahc_find_softc(struct ahc_softc *ahc) 3886 { 3887 struct ahc_softc *list_ahc; 3888 3889 TAILQ_FOREACH(list_ahc, &ahc_tailq, links) { 3890 if (list_ahc == ahc) 3891 return (ahc); 3892 } 3893 return (NULL); 3894 } 3895 3896 void 3897 ahc_set_unit(struct ahc_softc *ahc, int unit) 3898 { 3899 ahc->unit = unit; 3900 } 3901 3902 void 3903 ahc_set_name(struct ahc_softc *ahc, char *name) 3904 { 3905 if (ahc->name != NULL) 3906 free(ahc->name, M_DEVBUF); 3907 ahc->name = name; 3908 } 3909 3910 void 3911 ahc_free(struct ahc_softc *ahc) 3912 { 3913 int i; 3914 3915 ahc_fini_scbdata(ahc); 3916 switch (ahc->init_level) { 3917 default: 3918 case 2: 3919 ahc_shutdown(ahc); 3920 /* TAILQ_REMOVE(&ahc_tailq, ahc, links); XXX */ 3921 /* FALLTHROUGH */ 3922 case 1: 3923 bus_dmamap_unload(ahc->parent_dmat, ahc->shared_data_dmamap); 3924 bus_dmamap_destroy(ahc->parent_dmat, ahc->shared_data_dmamap); 3925 bus_dmamem_unmap(ahc->parent_dmat, (caddr_t)ahc->qoutfifo, ahc->shared_data_size); 3926 bus_dmamem_free(ahc->parent_dmat, &ahc->shared_data_seg, ahc->shared_data_nseg); 3927 break; 3928 case 0: 3929 break; 3930 } 3931 3932 ahc_platform_free(ahc); 3933 for (i = 0; i < AHC_NUM_TARGETS; i++) { 3934 struct ahc_tmode_tstate *tstate; 3935 3936 tstate = ahc->enabled_targets[i]; 3937 if (tstate != NULL) { 3938 #if AHC_TARGET_MODE 3939 int j; 3940 3941 for (j = 0; j < AHC_NUM_LUNS; j++) { 3942 struct ahc_tmode_lstate *lstate; 3943 3944 lstate = tstate->enabled_luns[j]; 3945 if (lstate != NULL) { 3946 /*xpt_free_path(lstate->path);*/ 3947 free(lstate, M_DEVBUF); 3948 } 3949 } 3950 #endif 3951 free(tstate, M_DEVBUF); 3952 } 3953 } 3954 #if AHC_TARGET_MODE 3955 if (ahc->black_hole != NULL) { 3956 /*xpt_free_path(ahc->black_hole->path);*/ 3957 free(ahc->black_hole, M_DEVBUF); 3958 } 3959 #endif 3960 #ifndef __NetBSD__ 3961 if (ahc->name != NULL) 3962 free(ahc->name, M_DEVBUF); 3963 #endif 3964 if (ahc->seep_config != NULL) 3965 free(ahc->seep_config, M_DEVBUF); 3966 #if !defined(__FreeBSD__) && !defined(__NetBSD__) 3967 free(ahc, M_DEVBUF); 3968 #endif 3969 return; 3970 } 3971 3972 void 3973 ahc_shutdown(void *arg) 3974 { 3975 struct ahc_softc *ahc; 3976 int i; 3977 3978 ahc = (struct ahc_softc *)arg; 3979 3980 /* This will reset most registers to 0, but not all */ 3981 ahc_reset(ahc); 3982 ahc_outb(ahc, SCSISEQ, 0); 3983 ahc_outb(ahc, SXFRCTL0, 0); 3984 ahc_outb(ahc, DSPCISTATUS, 0); 3985 3986 for (i = TARG_SCSIRATE; i < SCSICONF; i++) 3987 ahc_outb(ahc, i, 0); 3988 } 3989 3990 /* 3991 * Reset the controller and record some information about it 3992 * that is only available just after a reset. 3993 */ 3994 int 3995 ahc_reset(struct ahc_softc *ahc) 3996 { 3997 u_int sblkctl; 3998 u_int sxfrctl1_a, sxfrctl1_b; 3999 int wait; 4000 4001 /* 4002 * Preserve the value of the SXFRCTL1 register for all channels. 4003 * It contains settings that affect termination and we don't want 4004 * to disturb the integrity of the bus. 4005 */ 4006 ahc_pause(ahc); 4007 if ((ahc_inb(ahc, HCNTRL) & CHIPRST) != 0) { 4008 /* 4009 * The chip has not been initialized since 4010 * PCI/EISA/VLB bus reset. Don't trust 4011 * "left over BIOS data". 4012 */ 4013 ahc->flags |= AHC_NO_BIOS_INIT; 4014 } 4015 sxfrctl1_b = 0; 4016 if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7770) { 4017 u_int sblkctl1; 4018 4019 /* 4020 * Save channel B's settings in case this chip 4021 * is setup for TWIN channel operation. 4022 */ 4023 sblkctl1 = ahc_inb(ahc, SBLKCTL); 4024 ahc_outb(ahc, SBLKCTL, sblkctl1 | SELBUSB); 4025 sxfrctl1_b = ahc_inb(ahc, SXFRCTL1); 4026 ahc_outb(ahc, SBLKCTL, sblkctl1 & ~SELBUSB); 4027 } 4028 sxfrctl1_a = ahc_inb(ahc, SXFRCTL1); 4029 4030 ahc_outb(ahc, HCNTRL, CHIPRST | ahc->pause); 4031 4032 /* 4033 * Ensure that the reset has finished. We delay 1000us 4034 * prior to reading the register to make sure the chip 4035 * has sufficiently completed its reset to handle register 4036 * accesses. 4037 */ 4038 wait = 1000; 4039 do { 4040 ahc_delay(1000); 4041 } while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK)); 4042 4043 if (wait == 0) { 4044 printf("%s: WARNING - Failed chip reset! " 4045 "Trying to initialize anyway.\n", ahc_name(ahc)); 4046 } 4047 ahc_outb(ahc, HCNTRL, ahc->pause); 4048 4049 /* Determine channel configuration */ 4050 sblkctl = ahc_inb(ahc, SBLKCTL) & (SELBUSB|SELWIDE); 4051 /* No Twin Channel PCI cards */ 4052 if ((ahc->chip & AHC_PCI) != 0) 4053 sblkctl &= ~SELBUSB; 4054 switch (sblkctl) { 4055 case 0: 4056 /* Single Narrow Channel */ 4057 break; 4058 case 2: 4059 /* Wide Channel */ 4060 ahc->features |= AHC_WIDE; 4061 break; 4062 case 8: 4063 /* Twin Channel */ 4064 ahc->features |= AHC_TWIN; 4065 break; 4066 default: 4067 printf(" Unsupported adapter type (0x%x). Ignoring\n", sblkctl); 4068 return(-1); 4069 } 4070 4071 /* 4072 * Reload sxfrctl1. 4073 * 4074 * We must always initialize STPWEN to 1 before we 4075 * restore the saved values. STPWEN is initialized 4076 * to a tri-state condition which can only be cleared 4077 * by turning it on. 4078 */ 4079 if ((ahc->features & AHC_TWIN) != 0) { 4080 u_int sblkctl1; 4081 4082 sblkctl1 = ahc_inb(ahc, SBLKCTL); 4083 ahc_outb(ahc, SBLKCTL, sblkctl1 | SELBUSB); 4084 ahc_outb(ahc, SXFRCTL1, sxfrctl1_b); 4085 ahc_outb(ahc, SBLKCTL, sblkctl1 & ~SELBUSB); 4086 } 4087 ahc_outb(ahc, SXFRCTL1, sxfrctl1_a); 4088 4089 #ifdef AHC_DUMP_SEQ 4090 if (ahc->init_level == 0) 4091 ahc_dumpseq(ahc); 4092 #endif 4093 4094 return (0); 4095 } 4096 4097 /* 4098 * Determine the number of SCBs available on the controller 4099 */ 4100 int 4101 ahc_probe_scbs(struct ahc_softc *ahc) { 4102 int i; 4103 4104 for (i = 0; i < AHC_SCB_MAX; i++) { 4105 4106 ahc_outb(ahc, SCBPTR, i); 4107 ahc_outb(ahc, SCB_BASE, i); 4108 if (ahc_inb(ahc, SCB_BASE) != i) 4109 break; 4110 ahc_outb(ahc, SCBPTR, 0); 4111 if (ahc_inb(ahc, SCB_BASE) != 0) 4112 break; 4113 } 4114 return (i); 4115 } 4116 4117 #if 0 4118 static void 4119 ahc_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 4120 { 4121 bus_addr_t *baddr; 4122 4123 baddr = (bus_addr_t *)arg; 4124 *baddr = segs->ds_addr; 4125 } 4126 #endif 4127 4128 static void 4129 ahc_build_free_scb_list(struct ahc_softc *ahc) 4130 { 4131 int scbsize; 4132 int i; 4133 4134 scbsize = 32; 4135 if ((ahc->flags & AHC_LSCBS_ENABLED) != 0) 4136 scbsize = 64; 4137 4138 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 4139 int j; 4140 4141 ahc_outb(ahc, SCBPTR, i); 4142 4143 /* 4144 * Touch all SCB bytes to avoid parity errors 4145 * should one of our debugging routines read 4146 * an otherwise uninitiatlized byte. 4147 */ 4148 for (j = 0; j < scbsize; j++) 4149 ahc_outb(ahc, SCB_BASE+j, 0xFF); 4150 4151 /* Clear the control byte. */ 4152 ahc_outb(ahc, SCB_CONTROL, 0); 4153 4154 /* Set the next pointer */ 4155 if ((ahc->flags & AHC_PAGESCBS) != 0) 4156 ahc_outb(ahc, SCB_NEXT, i+1); 4157 else 4158 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL); 4159 4160 /* Make the tag number, SCSIID, and lun invalid */ 4161 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL); 4162 ahc_outb(ahc, SCB_SCSIID, 0xFF); 4163 ahc_outb(ahc, SCB_LUN, 0xFF); 4164 } 4165 4166 /* Make sure that the last SCB terminates the free list */ 4167 ahc_outb(ahc, SCBPTR, i-1); 4168 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL); 4169 } 4170 4171 static int 4172 ahc_init_scbdata(struct ahc_softc *ahc) 4173 { 4174 struct scb_data *scb_data; 4175 4176 scb_data = ahc->scb_data; 4177 SLIST_INIT(&scb_data->free_scbs); 4178 SLIST_INIT(&scb_data->sg_maps); 4179 4180 /* Allocate SCB resources */ 4181 scb_data->scbarray = 4182 (struct scb *)malloc(sizeof(struct scb) * AHC_SCB_MAX_ALLOC, 4183 M_DEVBUF, M_NOWAIT); 4184 if (scb_data->scbarray == NULL) 4185 return (ENOMEM); 4186 memset(scb_data->scbarray, 0, sizeof(struct scb) * AHC_SCB_MAX_ALLOC); 4187 4188 /* Determine the number of hardware SCBs and initialize them */ 4189 4190 scb_data->maxhscbs = ahc_probe_scbs(ahc); 4191 if ((ahc->flags & AHC_PAGESCBS) != 0) { 4192 /* SCB 0 heads the free list */ 4193 ahc_outb(ahc, FREE_SCBH, 0); 4194 } else { 4195 ahc_outb(ahc, FREE_SCBH, SCB_LIST_NULL); 4196 } 4197 4198 if (ahc->scb_data->maxhscbs == 0) { 4199 printf("%s: No SCB space found\n", ahc_name(ahc)); 4200 return (ENXIO); 4201 } 4202 4203 ahc_build_free_scb_list(ahc); 4204 4205 /* 4206 * Create our DMA tags. These tags define the kinds of device 4207 * accessible memory allocations and memory mappings we will 4208 * need to perform during normal operation. 4209 * 4210 * Unless we need to further restrict the allocation, we rely 4211 * on the restrictions of the parent dmat, hence the common 4212 * use of MAXADDR and MAXSIZE. 4213 */ 4214 4215 if (ahc_createdmamem(ahc->parent_dmat, 4216 AHC_SCB_MAX * sizeof(struct hardware_scb), ahc->sc_dmaflags, 4217 &scb_data->hscb_dmamap, 4218 (caddr_t *)&scb_data->hscbs, &scb_data->hscb_busaddr, 4219 &scb_data->hscb_seg, &scb_data->hscb_nseg, ahc_name(ahc), 4220 "hardware SCB structures") < 0) 4221 goto error_exit; 4222 4223 scb_data->init_level++; 4224 4225 if (ahc_createdmamem(ahc->parent_dmat, 4226 AHC_SCB_MAX * sizeof(struct scsi_sense_data), ahc->sc_dmaflags, 4227 &scb_data->sense_dmamap, (caddr_t *)&scb_data->sense, 4228 &scb_data->sense_busaddr, &scb_data->sense_seg, 4229 &scb_data->sense_nseg, ahc_name(ahc), "sense buffers") < 0) 4230 goto error_exit; 4231 4232 scb_data->init_level++; 4233 4234 /* Perform initial CCB allocation */ 4235 memset(scb_data->hscbs, 0, 4236 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb)); 4237 ahc_alloc_scbs(ahc); 4238 scb_data->init_level++; 4239 4240 if (scb_data->numscbs == 0) { 4241 printf("%s: ahc_init_scbdata - " 4242 "Unable to allocate initial scbs\n", 4243 ahc_name(ahc)); 4244 goto error_exit; 4245 } 4246 4247 /* 4248 * Tell the sequencer which SCB will be the next one it receives. 4249 */ 4250 ahc->next_queued_scb = ahc_get_scb(ahc); 4251 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag); 4252 4253 /* 4254 * Note that we were successfull 4255 */ 4256 return (0); 4257 4258 error_exit: 4259 4260 return (ENOMEM); 4261 } 4262 4263 static void 4264 ahc_fini_scbdata(struct ahc_softc *ahc) 4265 { 4266 struct scb_data *scb_data; 4267 4268 scb_data = ahc->scb_data; 4269 if (scb_data == NULL) 4270 return; 4271 4272 switch (scb_data->init_level) { 4273 default: 4274 case 5: 4275 { 4276 struct sg_map_node *sg_map; 4277 4278 while ((sg_map = SLIST_FIRST(&scb_data->sg_maps))!= NULL) { 4279 SLIST_REMOVE_HEAD(&scb_data->sg_maps, links); 4280 ahc_freedmamem(ahc->parent_dmat, PAGE_SIZE, 4281 sg_map->sg_dmamap, (caddr_t)sg_map->sg_vaddr, 4282 &sg_map->sg_dmasegs, sg_map->sg_nseg); 4283 free(sg_map, M_DEVBUF); 4284 } 4285 } 4286 /*FALLTHROUGH*/ 4287 case 4: 4288 ahc_freedmamem(ahc->parent_dmat, 4289 AHC_SCB_MAX * sizeof(struct scsi_sense_data), 4290 scb_data->sense_dmamap, (caddr_t)scb_data->sense, 4291 &scb_data->sense_seg, scb_data->sense_nseg); 4292 /*FALLTHROUGH*/ 4293 case 3: 4294 ahc_freedmamem(ahc->parent_dmat, 4295 AHC_SCB_MAX * sizeof(struct hardware_scb), 4296 scb_data->hscb_dmamap, (caddr_t)scb_data->hscbs, 4297 &scb_data->hscb_seg, scb_data->hscb_nseg); 4298 /*FALLTHROUGH*/ 4299 case 2: 4300 case 1: 4301 case 0: 4302 break; 4303 } 4304 if (scb_data->scbarray != NULL) 4305 free(scb_data->scbarray, M_DEVBUF); 4306 } 4307 4308 int 4309 ahc_alloc_scbs(struct ahc_softc *ahc) 4310 { 4311 struct scb_data *scb_data; 4312 struct scb *next_scb; 4313 struct sg_map_node *sg_map; 4314 bus_addr_t physaddr; 4315 struct ahc_dma_seg *segs; 4316 int newcount; 4317 int i; 4318 4319 scb_data = ahc->scb_data; 4320 if (scb_data->numscbs >= AHC_SCB_MAX_ALLOC) 4321 /* Can't allocate any more */ 4322 return (0); 4323 4324 next_scb = &scb_data->scbarray[scb_data->numscbs]; 4325 4326 sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_WAITOK); 4327 4328 if (sg_map == NULL) 4329 return (0); 4330 4331 /* Allocate S/G space for the next batch of SCBS */ 4332 if (ahc_createdmamem(ahc->parent_dmat, PAGE_SIZE, ahc->sc_dmaflags, 4333 &sg_map->sg_dmamap, 4334 (caddr_t *)&sg_map->sg_vaddr, &sg_map->sg_physaddr, 4335 &sg_map->sg_dmasegs, &sg_map->sg_nseg, ahc_name(ahc), 4336 "SG space") < 0) { 4337 free(sg_map, M_DEVBUF); 4338 return (0); 4339 } 4340 4341 SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links); 4342 4343 segs = sg_map->sg_vaddr; 4344 physaddr = sg_map->sg_physaddr; 4345 4346 newcount = (PAGE_SIZE / (AHC_NSEG * sizeof(struct ahc_dma_seg))); 4347 newcount = MIN(newcount, (AHC_SCB_MAX_ALLOC - scb_data->numscbs)); 4348 for (i = 0; i < newcount; i++) { 4349 struct scb_platform_data *pdata; 4350 int error; 4351 4352 pdata = (struct scb_platform_data *)malloc(sizeof(*pdata), 4353 M_DEVBUF, M_WAITOK); 4354 if (pdata == NULL) 4355 break; 4356 next_scb->platform_data = pdata; 4357 next_scb->sg_map = sg_map; 4358 next_scb->sg_list = segs; 4359 /* 4360 * The sequencer always starts with the second entry. 4361 * The first entry is embedded in the scb. 4362 */ 4363 next_scb->sg_list_phys = physaddr + sizeof(struct ahc_dma_seg); 4364 next_scb->ahc_softc = ahc; 4365 next_scb->flags = SCB_FREE; 4366 4367 error = bus_dmamap_create(ahc->parent_dmat, 4368 AHC_MAXTRANSFER_SIZE, AHC_NSEG, MAXPHYS, 0, 4369 BUS_DMA_WAITOK|BUS_DMA_ALLOCNOW|ahc->sc_dmaflags, 4370 &next_scb->dmamap); 4371 if (error != 0) 4372 break; 4373 4374 next_scb->hscb = &scb_data->hscbs[scb_data->numscbs]; 4375 next_scb->hscb->tag = ahc->scb_data->numscbs; 4376 SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, 4377 next_scb, links.sle); 4378 segs += AHC_NSEG; 4379 physaddr += (AHC_NSEG * sizeof(struct ahc_dma_seg)); 4380 next_scb++; 4381 ahc->scb_data->numscbs++; 4382 } 4383 return (newcount); 4384 } 4385 4386 void 4387 ahc_controller_info(struct ahc_softc *ahc, char *tbuf, size_t l) 4388 { 4389 int len; 4390 char *ep; 4391 4392 ep = tbuf + l; 4393 4394 len = snprintf(tbuf, ep - tbuf, "%s: ", 4395 ahc_chip_names[ahc->chip & AHC_CHIPID_MASK]); 4396 tbuf += len; 4397 if ((ahc->features & AHC_TWIN) != 0) 4398 len = snprintf(tbuf, ep - tbuf, "Twin Channel, A SCSI Id=%d, " 4399 "B SCSI Id=%d, primary %c, ", 4400 ahc->our_id, ahc->our_id_b, 4401 (ahc->flags & AHC_PRIMARY_CHANNEL) + 'A'); 4402 else { 4403 const char *speed; 4404 const char *type; 4405 4406 speed = ""; 4407 if ((ahc->features & AHC_ULTRA) != 0) { 4408 speed = "Ultra "; 4409 } else if ((ahc->features & AHC_DT) != 0) { 4410 speed = "Ultra160 "; 4411 } else if ((ahc->features & AHC_ULTRA2) != 0) { 4412 speed = "Ultra2 "; 4413 } 4414 if ((ahc->features & AHC_WIDE) != 0) { 4415 type = "Wide"; 4416 } else { 4417 type = "Single"; 4418 } 4419 len = snprintf(tbuf, ep - tbuf, "%s%s Channel %c, SCSI Id=%d, ", 4420 speed, type, ahc->channel, ahc->our_id); 4421 } 4422 tbuf += len; 4423 4424 if ((ahc->flags & AHC_PAGESCBS) != 0) 4425 snprintf(tbuf, ep - tbuf, "%d/%d SCBs", 4426 ahc->scb_data->maxhscbs, AHC_MAX_QUEUE); 4427 else 4428 snprintf(tbuf, ep - tbuf, "%d SCBs", ahc->scb_data->maxhscbs); 4429 } 4430 4431 /* 4432 * Start the board, ready for normal operation 4433 */ 4434 int 4435 ahc_init(struct ahc_softc *ahc) 4436 { 4437 int max_targ; 4438 int i; 4439 int term; 4440 u_int scsi_conf; 4441 u_int scsiseq_template; 4442 u_int ultraenb; 4443 u_int discenable; 4444 u_int tagenable; 4445 size_t driver_data_size; 4446 uint32_t physaddr; 4447 4448 #ifdef AHC_DEBUG 4449 if ((ahc_debug & AHC_DEBUG_SEQUENCER) != 0) 4450 ahc->flags |= AHC_SEQUENCER_DEBUG; 4451 #endif 4452 4453 #ifdef AHC_PRINT_SRAM 4454 printf("Scratch Ram:"); 4455 for (i = 0x20; i < 0x5f; i++) { 4456 if (((i % 8) == 0) && (i != 0)) { 4457 printf ("\n "); 4458 } 4459 printf (" 0x%x", ahc_inb(ahc, i)); 4460 } 4461 if ((ahc->features & AHC_MORE_SRAM) != 0) { 4462 for (i = 0x70; i < 0x7f; i++) { 4463 if (((i % 8) == 0) && (i != 0)) { 4464 printf ("\n "); 4465 } 4466 printf (" 0x%x", ahc_inb(ahc, i)); 4467 } 4468 } 4469 printf ("\n"); 4470 /* 4471 * Reading uninitialized scratch ram may 4472 * generate parity errors. 4473 */ 4474 ahc_outb(ahc, CLRINT, CLRPARERR); 4475 ahc_outb(ahc, CLRINT, CLRBRKADRINT); 4476 #endif 4477 max_targ = 15; 4478 4479 /* 4480 * Assume we have a board at this stage and it has been reset. 4481 */ 4482 if ((ahc->flags & AHC_USEDEFAULTS) != 0) 4483 ahc->our_id = ahc->our_id_b = 7; 4484 4485 /* 4486 * Default to allowing initiator operations. 4487 */ 4488 ahc->flags |= AHC_INITIATORROLE; 4489 4490 /* 4491 * Only allow target mode features if this unit has them enabled. 4492 */ 4493 //if ((AHC_TMODE_ENABLE & (0x1 << ahc->unit)) == 0) 4494 ahc->features &= ~AHC_TARGETMODE; 4495 4496 /* 4497 * DMA tag for our command fifos and other data in system memory 4498 * the card's sequencer must be able to access. For initiator 4499 * roles, we need to allocate space for the qinfifo and qoutfifo. 4500 * The qinfifo and qoutfifo are composed of 256 1 byte elements. 4501 * When providing for the target mode role, we must additionally 4502 * provide space for the incoming target command fifo and an extra 4503 * byte to deal with a DMA bug in some chip versions. 4504 */ 4505 driver_data_size = 2 * 256 * sizeof(uint8_t); 4506 if ((ahc->features & AHC_TARGETMODE) != 0) 4507 driver_data_size += AHC_TMODE_CMDS * sizeof(struct target_cmd) 4508 + /*DMA WideOdd Bug Buffer*/1; 4509 4510 if (ahc_createdmamem(ahc->parent_dmat, driver_data_size, 4511 ahc->sc_dmaflags, 4512 &ahc->shared_data_dmamap, (caddr_t *)&ahc->qoutfifo, 4513 &ahc->shared_data_busaddr, &ahc->shared_data_seg, 4514 &ahc->shared_data_nseg, ahc_name(ahc), "shared data") < 0) 4515 return (ENOMEM); 4516 4517 ahc->init_level++; 4518 4519 if ((ahc->features & AHC_TARGETMODE) != 0) { 4520 ahc->targetcmds = (struct target_cmd *)ahc->qoutfifo; 4521 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[AHC_TMODE_CMDS]; 4522 ahc->dma_bug_buf = ahc->shared_data_busaddr 4523 + driver_data_size - 1; 4524 /* All target command blocks start out invalid. */ 4525 for (i = 0; i < AHC_TMODE_CMDS; i++) 4526 ahc->targetcmds[i].cmd_valid = 0; 4527 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_PREREAD); 4528 ahc->tqinfifonext = 1; 4529 ahc_outb(ahc, KERNEL_TQINPOS, ahc->tqinfifonext - 1); 4530 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext); 4531 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[256]; 4532 } 4533 ahc->qinfifo = &ahc->qoutfifo[256]; 4534 4535 ahc->init_level++; 4536 4537 /* Allocate SCB data now that buffer_dmat is initialized */ 4538 if (ahc->scb_data->maxhscbs == 0) 4539 if (ahc_init_scbdata(ahc) != 0) 4540 return (ENOMEM); 4541 4542 if (bootverbose) 4543 printf("%s: found %d SCBs\n", ahc_name(ahc), 4544 ahc->scb_data->maxhscbs); 4545 4546 /* 4547 * Allocate a tstate to house information for our 4548 * initiator presence on the bus as well as the user 4549 * data for any target mode initiator. 4550 */ 4551 if (ahc_alloc_tstate(ahc, ahc->our_id, 'A') == NULL) { 4552 printf("%s: unable to allocate ahc_tmode_tstate. " 4553 "Failing attach\n", ahc_name(ahc)); 4554 return (ENOMEM); 4555 } 4556 4557 if ((ahc->features & AHC_TWIN) != 0) { 4558 if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) { 4559 printf("%s: unable to allocate ahc_tmode_tstate. " 4560 "Failing attach\n", ahc_name(ahc)); 4561 return (ENOMEM); 4562 } 4563 } 4564 4565 ahc_outb(ahc, SEQ_FLAGS, 0); 4566 ahc_outb(ahc, SEQ_FLAGS2, 0); 4567 4568 if (ahc->scb_data->maxhscbs < AHC_SCB_MAX_ALLOC) { 4569 ahc->flags |= AHC_PAGESCBS; 4570 } else { 4571 ahc->flags &= ~AHC_PAGESCBS; 4572 } 4573 4574 #ifdef AHC_DEBUG 4575 if (ahc_debug & AHC_SHOW_MISC) { 4576 printf("%s: hardware scb %lu bytes; kernel scb %lu bytes; " 4577 "ahc_dma %lu bytes\n", 4578 ahc_name(ahc), 4579 (u_long)sizeof(struct hardware_scb), 4580 (u_long)sizeof(struct scb), 4581 (u_long)sizeof(struct ahc_dma_seg)); 4582 } 4583 #endif /* AHC_DEBUG */ 4584 4585 /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/ 4586 if (ahc->features & AHC_TWIN) { 4587 4588 /* 4589 * The device is gated to channel B after a chip reset, 4590 * so set those values first 4591 */ 4592 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB); 4593 term = (ahc->flags & AHC_TERM_ENB_B) != 0 ? STPWEN : 0; 4594 ahc_outb(ahc, SCSIID, ahc->our_id_b); 4595 scsi_conf = ahc_inb(ahc, SCSICONF + 1); 4596 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) 4597 |term|ahc->seltime_b|ENSTIMER|ACTNEGEN); 4598 if ((ahc->features & AHC_ULTRA2) != 0) 4599 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR); 4600 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); 4601 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN); 4602 4603 if ((scsi_conf & RESET_SCSI) != 0 4604 && (ahc->flags & AHC_INITIATORROLE) != 0) 4605 ahc->flags |= AHC_RESET_BUS_B; 4606 4607 /* Select Channel A */ 4608 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB); 4609 } 4610 4611 term = (ahc->flags & AHC_TERM_ENB_A) != 0 ? STPWEN : 0; 4612 if ((ahc->features & AHC_ULTRA2) != 0) 4613 ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id); 4614 else 4615 ahc_outb(ahc, SCSIID, ahc->our_id); 4616 scsi_conf = ahc_inb(ahc, SCSICONF); 4617 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) 4618 |term|ahc->seltime 4619 |ENSTIMER|ACTNEGEN); 4620 if ((ahc->features & AHC_ULTRA2) != 0) 4621 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR); 4622 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); 4623 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN); 4624 4625 if ((scsi_conf & RESET_SCSI) != 0 4626 && (ahc->flags & AHC_INITIATORROLE) != 0) 4627 ahc->flags |= AHC_RESET_BUS_A; 4628 4629 /* 4630 * Look at the information that board initialization or 4631 * the board bios has left us. 4632 */ 4633 ultraenb = 0; 4634 tagenable = ALL_TARGETS_MASK; 4635 4636 /* Grab the disconnection disable table and invert it for our needs */ 4637 if ((ahc->flags & AHC_USEDEFAULTS) != 0) { 4638 printf("%s: Host Adapter BIOS disabled. Using default SCSI " 4639 "host and target device parameters\n", ahc_name(ahc)); 4640 ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B| 4641 AHC_TERM_ENB_A|AHC_TERM_ENB_B; 4642 discenable = ALL_TARGETS_MASK; 4643 if ((ahc->features & AHC_ULTRA) != 0) 4644 ultraenb = ALL_TARGETS_MASK; 4645 } else if ((ahc->flags & AHC_USETARGETDEFAULTS) != 0) { 4646 printf("%s: Host Adapter has no SEEPROM. Using default SCSI" 4647 " target parameters\n", ahc_name(ahc)); 4648 ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B; 4649 discenable = ALL_TARGETS_MASK; 4650 if ((ahc->features & AHC_ULTRA) != 0) 4651 ultraenb = ALL_TARGETS_MASK; 4652 } else { 4653 discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8) 4654 | ahc_inb(ahc, DISC_DSB)); 4655 if ((ahc->features & (AHC_ULTRA|AHC_ULTRA2)) != 0) 4656 ultraenb = (ahc_inb(ahc, ULTRA_ENB + 1) << 8) 4657 | ahc_inb(ahc, ULTRA_ENB); 4658 } 4659 4660 if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0) 4661 max_targ = 7; 4662 4663 for (i = 0; i <= max_targ; i++) { 4664 struct ahc_initiator_tinfo *tinfo; 4665 struct ahc_tmode_tstate *tstate; 4666 u_int our_id; 4667 u_int target_id; 4668 char channel; 4669 4670 channel = 'A'; 4671 our_id = ahc->our_id; 4672 target_id = i; 4673 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 4674 channel = 'B'; 4675 our_id = ahc->our_id_b; 4676 target_id = i % 8; 4677 } 4678 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 4679 target_id, &tstate); 4680 /* Default to async narrow across the board */ 4681 memset(tinfo, 0, sizeof(*tinfo)); 4682 if (ahc->flags & (AHC_USEDEFAULTS | AHC_USETARGETDEFAULTS)) { 4683 if ((ahc->features & AHC_WIDE) != 0) 4684 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; 4685 4686 /* 4687 * These will be truncated when we determine the 4688 * connection type we have with the target. 4689 */ 4690 tinfo->user.period = ahc_syncrates->period; 4691 tinfo->user.offset = ~0; 4692 } else { 4693 u_int scsirate; 4694 uint16_t mask; 4695 4696 /* Take the settings leftover in scratch RAM. */ 4697 scsirate = ahc_inb(ahc, TARG_SCSIRATE + i); 4698 mask = (0x01 << i); 4699 if ((ahc->features & AHC_ULTRA2) != 0) { 4700 u_int offset; 4701 u_int maxsync; 4702 4703 if ((scsirate & SOFS) == 0x0F) { 4704 /* 4705 * Haven't negotiated yet, 4706 * so the format is different. 4707 */ 4708 scsirate = (scsirate & SXFR) >> 4 4709 | (ultraenb & mask) 4710 ? 0x08 : 0x0 4711 | (scsirate & WIDEXFER); 4712 offset = MAX_OFFSET_ULTRA2; 4713 } else 4714 offset = ahc_inb(ahc, TARG_OFFSET + i); 4715 if ((scsirate & ~WIDEXFER) == 0 && offset != 0) 4716 /* Set to the lowest sync rate, 5MHz */ 4717 scsirate |= 0x1c; 4718 maxsync = AHC_SYNCRATE_ULTRA2; 4719 if ((ahc->features & AHC_DT) != 0) 4720 maxsync = AHC_SYNCRATE_DT; 4721 tinfo->user.period = 4722 ahc_find_period(ahc, scsirate, maxsync); 4723 if (offset == 0) 4724 tinfo->user.period = 0; 4725 else 4726 tinfo->user.offset = ~0; 4727 if ((scsirate & SXFR_ULTRA2) <= 8/*10MHz*/ 4728 && (ahc->features & AHC_DT) != 0) 4729 tinfo->user.ppr_options = 4730 MSG_EXT_PPR_DT_REQ; 4731 } else if ((scsirate & SOFS) != 0) { 4732 if ((scsirate & SXFR) == 0x40 4733 && (ultraenb & mask) != 0) { 4734 /* Treat 10MHz as a non-ultra speed */ 4735 scsirate &= ~SXFR; 4736 ultraenb &= ~mask; 4737 } 4738 tinfo->user.period = 4739 ahc_find_period(ahc, scsirate, 4740 (ultraenb & mask) 4741 ? AHC_SYNCRATE_ULTRA 4742 : AHC_SYNCRATE_FAST); 4743 if (tinfo->user.period != 0) 4744 tinfo->user.offset = ~0; 4745 } 4746 if (tinfo->user.period == 0) 4747 tinfo->user.offset = 0; 4748 if ((scsirate & WIDEXFER) != 0 4749 && (ahc->features & AHC_WIDE) != 0) 4750 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; 4751 tinfo->user.protocol_version = 4; 4752 if ((ahc->features & AHC_DT) != 0) 4753 tinfo->user.transport_version = 3; 4754 else 4755 tinfo->user.transport_version = 2; 4756 tinfo->goal.protocol_version = 2; 4757 tinfo->goal.transport_version = 2; 4758 tinfo->curr.protocol_version = 2; 4759 tinfo->curr.transport_version = 2; 4760 } 4761 tstate->ultraenb = 0; 4762 tstate->discenable = discenable; 4763 } 4764 ahc->user_discenable = discenable; 4765 ahc->user_tagenable = tagenable; 4766 4767 /* There are no untagged SCBs active yet. */ 4768 for (i = 0; i < 16; i++) { 4769 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, 0)); 4770 if ((ahc->flags & AHC_SCB_BTT) != 0) { 4771 int lun; 4772 4773 /* 4774 * The SCB based BTT allows an entry per 4775 * target and lun pair. 4776 */ 4777 for (lun = 1; lun < AHC_NUM_LUNS; lun++) 4778 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, lun)); 4779 } 4780 } 4781 4782 /* All of our queues are empty */ 4783 for (i = 0; i < 256; i++) 4784 ahc->qoutfifo[i] = SCB_LIST_NULL; 4785 4786 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_PREREAD); 4787 4788 for (i = 0; i < 256; i++) 4789 ahc->qinfifo[i] = SCB_LIST_NULL; 4790 4791 if ((ahc->features & AHC_MULTI_TID) != 0) { 4792 ahc_outb(ahc, TARGID, 0); 4793 ahc_outb(ahc, TARGID + 1, 0); 4794 } 4795 4796 /* 4797 * Tell the sequencer where it can find our arrays in memory. 4798 */ 4799 physaddr = ahc->scb_data->hscb_busaddr; 4800 ahc_outb(ahc, HSCB_ADDR, physaddr & 0xFF); 4801 ahc_outb(ahc, HSCB_ADDR + 1, (physaddr >> 8) & 0xFF); 4802 ahc_outb(ahc, HSCB_ADDR + 2, (physaddr >> 16) & 0xFF); 4803 ahc_outb(ahc, HSCB_ADDR + 3, (physaddr >> 24) & 0xFF); 4804 4805 physaddr = ahc->shared_data_busaddr; 4806 ahc_outb(ahc, SHARED_DATA_ADDR, physaddr & 0xFF); 4807 ahc_outb(ahc, SHARED_DATA_ADDR + 1, (physaddr >> 8) & 0xFF); 4808 ahc_outb(ahc, SHARED_DATA_ADDR + 2, (physaddr >> 16) & 0xFF); 4809 ahc_outb(ahc, SHARED_DATA_ADDR + 3, (physaddr >> 24) & 0xFF); 4810 4811 /* 4812 * Initialize the group code to command length table. 4813 * This overrides the values in TARG_SCSIRATE, so only 4814 * setup the table after we have processed that information. 4815 */ 4816 ahc_outb(ahc, CMDSIZE_TABLE, 5); 4817 ahc_outb(ahc, CMDSIZE_TABLE + 1, 9); 4818 ahc_outb(ahc, CMDSIZE_TABLE + 2, 9); 4819 ahc_outb(ahc, CMDSIZE_TABLE + 3, 0); 4820 ahc_outb(ahc, CMDSIZE_TABLE + 4, 15); 4821 ahc_outb(ahc, CMDSIZE_TABLE + 5, 11); 4822 ahc_outb(ahc, CMDSIZE_TABLE + 6, 0); 4823 ahc_outb(ahc, CMDSIZE_TABLE + 7, 0); 4824 4825 /* Tell the sequencer of our initial queue positions */ 4826 ahc_outb(ahc, KERNEL_QINPOS, 0); 4827 ahc_outb(ahc, QINPOS, 0); 4828 ahc_outb(ahc, QOUTPOS, 0); 4829 4830 /* 4831 * Use the built in queue management registers 4832 * if they are available. 4833 */ 4834 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 4835 ahc_outb(ahc, QOFF_CTLSTA, SCB_QSIZE_256); 4836 ahc_outb(ahc, SDSCB_QOFF, 0); 4837 ahc_outb(ahc, SNSCB_QOFF, 0); 4838 ahc_outb(ahc, HNSCB_QOFF, 0); 4839 } 4840 4841 4842 /* We don't have any waiting selections */ 4843 ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL); 4844 4845 /* Our disconnection list is empty too */ 4846 ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL); 4847 4848 /* Message out buffer starts empty */ 4849 ahc_outb(ahc, MSG_OUT, MSG_NOOP); 4850 4851 /* 4852 * Setup the allowed SCSI Sequences based on operational mode. 4853 * If we are a target, we'll enable select in operations once 4854 * we've had a lun enabled. 4855 */ 4856 scsiseq_template = ENSELO|ENAUTOATNO|ENAUTOATNP; 4857 if ((ahc->flags & AHC_INITIATORROLE) != 0) 4858 scsiseq_template |= ENRSELI; 4859 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq_template); 4860 4861 /* 4862 * Load the Sequencer program and Enable the adapter 4863 * in "fast" mode. 4864 */ 4865 if (bootverbose) 4866 printf("%s: Downloading Sequencer Program...", 4867 ahc_name(ahc)); 4868 4869 ahc_loadseq(ahc); 4870 4871 if ((ahc->features & AHC_ULTRA2) != 0) { 4872 int wait; 4873 4874 /* 4875 * Wait for up to 500ms for our transceivers 4876 * to settle. If the adapter does not have 4877 * a cable attached, the transceivers may 4878 * never settle, so don't complain if we 4879 * fail here. 4880 */ 4881 ahc_pause(ahc); 4882 for (wait = 5000; 4883 (ahc_inb(ahc, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait; 4884 wait--) 4885 ahc_delay(100); 4886 ahc_unpause(ahc); 4887 } 4888 4889 /* We have to wait until after any system dumps... */ 4890 ahc->shutdown_hook = shutdownhook_establish(ahc_shutdown, ahc); 4891 4892 return (0); 4893 } 4894 4895 void 4896 ahc_intr_enable(struct ahc_softc *ahc, int enable) 4897 { 4898 u_int hcntrl; 4899 4900 hcntrl = ahc_inb(ahc, HCNTRL); 4901 hcntrl &= ~INTEN; 4902 ahc->pause &= ~INTEN; 4903 ahc->unpause &= ~INTEN; 4904 if (enable) { 4905 hcntrl |= INTEN; 4906 ahc->pause |= INTEN; 4907 ahc->unpause |= INTEN; 4908 } 4909 ahc_outb(ahc, HCNTRL, hcntrl); 4910 } 4911 4912 /* 4913 * Ensure that the card is paused in a location 4914 * outside of all critical sections and that all 4915 * pending work is completed prior to returning. 4916 * This routine should only be called from outside 4917 * an interrupt context. 4918 */ 4919 void 4920 ahc_pause_and_flushwork(struct ahc_softc *ahc) 4921 { 4922 int intstat; 4923 int maxloops; 4924 int paused; 4925 4926 maxloops = 1000; 4927 ahc->flags |= AHC_ALL_INTERRUPTS; 4928 intstat = 0; 4929 paused = FALSE; 4930 do { 4931 if (paused) 4932 ahc_unpause(ahc); 4933 ahc_intr(ahc); 4934 ahc_pause(ahc); 4935 paused = TRUE; 4936 ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & ~ENSELO); 4937 ahc_clear_critical_section(ahc); 4938 if (intstat == 0xFF && (ahc->features & AHC_REMOVABLE) != 0) 4939 break; 4940 } while (--maxloops 4941 && (((intstat = ahc_inb(ahc, INTSTAT)) & INT_PEND) != 0 4942 || (ahc_inb(ahc, SSTAT0) & (SELDO|SELINGO)))); 4943 if (maxloops == 0) { 4944 printf("Infinite interrupt loop, INTSTAT = %x", 4945 ahc_inb(ahc, INTSTAT)); 4946 } 4947 ahc_platform_flushwork(ahc); 4948 ahc->flags &= ~AHC_ALL_INTERRUPTS; 4949 } 4950 4951 int 4952 ahc_suspend(struct ahc_softc *ahc) 4953 { 4954 uint8_t *ptr; 4955 int i; 4956 4957 ahc_pause_and_flushwork(ahc); 4958 4959 if (LIST_FIRST(&ahc->pending_scbs) != NULL) 4960 return (EBUSY); 4961 4962 #if AHC_TARGET_MODE 4963 /* 4964 * XXX What about ATIOs that have not yet been serviced? 4965 * Perhaps we should just refuse to be suspended if we 4966 * are acting in a target role. 4967 */ 4968 if (ahc->pending_device != NULL) 4969 return (EBUSY); 4970 #endif 4971 4972 /* Save volatile registers */ 4973 if ((ahc->features & AHC_TWIN) != 0) { 4974 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB); 4975 ahc->suspend_state.channel[1].scsiseq = ahc_inb(ahc, SCSISEQ); 4976 ahc->suspend_state.channel[1].sxfrctl0 = ahc_inb(ahc, SXFRCTL0); 4977 ahc->suspend_state.channel[1].sxfrctl1 = ahc_inb(ahc, SXFRCTL1); 4978 ahc->suspend_state.channel[1].simode0 = ahc_inb(ahc, SIMODE0); 4979 ahc->suspend_state.channel[1].simode1 = ahc_inb(ahc, SIMODE1); 4980 ahc->suspend_state.channel[1].seltimer = ahc_inb(ahc, SELTIMER); 4981 ahc->suspend_state.channel[1].seqctl = ahc_inb(ahc, SEQCTL); 4982 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB); 4983 } 4984 ahc->suspend_state.channel[0].scsiseq = ahc_inb(ahc, SCSISEQ); 4985 ahc->suspend_state.channel[0].sxfrctl0 = ahc_inb(ahc, SXFRCTL0); 4986 ahc->suspend_state.channel[0].sxfrctl1 = ahc_inb(ahc, SXFRCTL1); 4987 ahc->suspend_state.channel[0].simode0 = ahc_inb(ahc, SIMODE0); 4988 ahc->suspend_state.channel[0].simode1 = ahc_inb(ahc, SIMODE1); 4989 ahc->suspend_state.channel[0].seltimer = ahc_inb(ahc, SELTIMER); 4990 ahc->suspend_state.channel[0].seqctl = ahc_inb(ahc, SEQCTL); 4991 4992 if ((ahc->chip & AHC_PCI) != 0) { 4993 ahc->suspend_state.dscommand0 = ahc_inb(ahc, DSCOMMAND0); 4994 ahc->suspend_state.dspcistatus = ahc_inb(ahc, DSPCISTATUS); 4995 } 4996 4997 if ((ahc->features & AHC_DT) != 0) { 4998 u_int sfunct; 4999 5000 sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE; 5001 ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE); 5002 ahc->suspend_state.optionmode = ahc_inb(ahc, OPTIONMODE); 5003 ahc_outb(ahc, SFUNCT, sfunct); 5004 ahc->suspend_state.crccontrol1 = ahc_inb(ahc, CRCCONTROL1); 5005 } 5006 5007 if ((ahc->features & AHC_MULTI_FUNC) != 0) 5008 ahc->suspend_state.scbbaddr = ahc_inb(ahc, SCBBADDR); 5009 5010 if ((ahc->features & AHC_ULTRA2) != 0) 5011 ahc->suspend_state.dff_thrsh = ahc_inb(ahc, DFF_THRSH); 5012 5013 ptr = ahc->suspend_state.scratch_ram; 5014 for (i = 0; i < 64; i++) 5015 *ptr++ = ahc_inb(ahc, SRAM_BASE + i); 5016 5017 if ((ahc->features & AHC_MORE_SRAM) != 0) { 5018 for (i = 0; i < 16; i++) 5019 *ptr++ = ahc_inb(ahc, TARG_OFFSET + i); 5020 } 5021 5022 ptr = ahc->suspend_state.btt; 5023 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5024 for (i = 0;i < AHC_NUM_TARGETS; i++) { 5025 int j; 5026 5027 for (j = 0;j < AHC_NUM_LUNS; j++) { 5028 u_int tcl; 5029 5030 tcl = BUILD_TCL(i << 4, j); 5031 *ptr = ahc_index_busy_tcl(ahc, tcl); 5032 } 5033 } 5034 } 5035 ahc_shutdown(ahc); 5036 return (0); 5037 } 5038 5039 int 5040 ahc_resume(struct ahc_softc *ahc) 5041 { 5042 uint8_t *ptr; 5043 int i; 5044 5045 ahc_reset(ahc); 5046 5047 ahc_build_free_scb_list(ahc); 5048 5049 /* Restore volatile registers */ 5050 if ((ahc->features & AHC_TWIN) != 0) { 5051 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB); 5052 ahc_outb(ahc, SCSIID, ahc->our_id); 5053 ahc_outb(ahc, SCSISEQ, ahc->suspend_state.channel[1].scsiseq); 5054 ahc_outb(ahc, SXFRCTL0, ahc->suspend_state.channel[1].sxfrctl0); 5055 ahc_outb(ahc, SXFRCTL1, ahc->suspend_state.channel[1].sxfrctl1); 5056 ahc_outb(ahc, SIMODE0, ahc->suspend_state.channel[1].simode0); 5057 ahc_outb(ahc, SIMODE1, ahc->suspend_state.channel[1].simode1); 5058 ahc_outb(ahc, SELTIMER, ahc->suspend_state.channel[1].seltimer); 5059 ahc_outb(ahc, SEQCTL, ahc->suspend_state.channel[1].seqctl); 5060 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB); 5061 } 5062 ahc_outb(ahc, SCSISEQ, ahc->suspend_state.channel[0].scsiseq); 5063 ahc_outb(ahc, SXFRCTL0, ahc->suspend_state.channel[0].sxfrctl0); 5064 ahc_outb(ahc, SXFRCTL1, ahc->suspend_state.channel[0].sxfrctl1); 5065 ahc_outb(ahc, SIMODE0, ahc->suspend_state.channel[0].simode0); 5066 ahc_outb(ahc, SIMODE1, ahc->suspend_state.channel[0].simode1); 5067 ahc_outb(ahc, SELTIMER, ahc->suspend_state.channel[0].seltimer); 5068 ahc_outb(ahc, SEQCTL, ahc->suspend_state.channel[0].seqctl); 5069 if ((ahc->features & AHC_ULTRA2) != 0) 5070 ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id); 5071 else 5072 ahc_outb(ahc, SCSIID, ahc->our_id); 5073 5074 if ((ahc->chip & AHC_PCI) != 0) { 5075 ahc_outb(ahc, DSCOMMAND0, ahc->suspend_state.dscommand0); 5076 ahc_outb(ahc, DSPCISTATUS, ahc->suspend_state.dspcistatus); 5077 } 5078 5079 if ((ahc->features & AHC_DT) != 0) { 5080 u_int sfunct; 5081 5082 sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE; 5083 ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE); 5084 ahc_outb(ahc, OPTIONMODE, ahc->suspend_state.optionmode); 5085 ahc_outb(ahc, SFUNCT, sfunct); 5086 ahc_outb(ahc, CRCCONTROL1, ahc->suspend_state.crccontrol1); 5087 } 5088 5089 if ((ahc->features & AHC_MULTI_FUNC) != 0) 5090 ahc_outb(ahc, SCBBADDR, ahc->suspend_state.scbbaddr); 5091 5092 if ((ahc->features & AHC_ULTRA2) != 0) 5093 ahc_outb(ahc, DFF_THRSH, ahc->suspend_state.dff_thrsh); 5094 5095 ptr = ahc->suspend_state.scratch_ram; 5096 for (i = 0; i < 64; i++) 5097 ahc_outb(ahc, SRAM_BASE + i, *ptr++); 5098 5099 if ((ahc->features & AHC_MORE_SRAM) != 0) { 5100 for (i = 0; i < 16; i++) 5101 ahc_outb(ahc, TARG_OFFSET + i, *ptr++); 5102 } 5103 5104 ptr = ahc->suspend_state.btt; 5105 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5106 for (i = 0;i < AHC_NUM_TARGETS; i++) { 5107 int j; 5108 5109 for (j = 0;j < AHC_NUM_LUNS; j++) { 5110 u_int tcl; 5111 5112 tcl = BUILD_TCL(i << 4, j); 5113 ahc_busy_tcl(ahc, tcl, *ptr); 5114 } 5115 } 5116 } 5117 return (0); 5118 } 5119 5120 /************************** Busy Target Table *********************************/ 5121 /* 5122 * Return the untagged transaction id for a given target/channel lun. 5123 * Optionally, clear the entry. 5124 */ 5125 u_int 5126 ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl) 5127 { 5128 u_int scbid; 5129 u_int target_offset; 5130 5131 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5132 u_int saved_scbptr; 5133 5134 saved_scbptr = ahc_inb(ahc, SCBPTR); 5135 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); 5136 scbid = ahc_inb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl)); 5137 ahc_outb(ahc, SCBPTR, saved_scbptr); 5138 } else { 5139 target_offset = TCL_TARGET_OFFSET(tcl); 5140 scbid = ahc_inb(ahc, BUSY_TARGETS + target_offset); 5141 } 5142 5143 return (scbid); 5144 } 5145 5146 void 5147 ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl) 5148 { 5149 u_int target_offset; 5150 5151 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5152 u_int saved_scbptr; 5153 5154 saved_scbptr = ahc_inb(ahc, SCBPTR); 5155 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); 5156 ahc_outb(ahc, SCB_64_BTT+TCL_TARGET_OFFSET(tcl), SCB_LIST_NULL); 5157 ahc_outb(ahc, SCBPTR, saved_scbptr); 5158 } else { 5159 target_offset = TCL_TARGET_OFFSET(tcl); 5160 ahc_outb(ahc, BUSY_TARGETS + target_offset, SCB_LIST_NULL); 5161 } 5162 } 5163 5164 void 5165 ahc_busy_tcl(struct ahc_softc *ahc, u_int tcl, u_int scbid) 5166 { 5167 u_int target_offset; 5168 5169 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5170 u_int saved_scbptr; 5171 5172 saved_scbptr = ahc_inb(ahc, SCBPTR); 5173 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); 5174 ahc_outb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl), scbid); 5175 ahc_outb(ahc, SCBPTR, saved_scbptr); 5176 } else { 5177 target_offset = TCL_TARGET_OFFSET(tcl); 5178 ahc_outb(ahc, BUSY_TARGETS + target_offset, scbid); 5179 } 5180 } 5181 5182 /************************** SCB and SCB queue management **********************/ 5183 int 5184 ahc_match_scb(struct ahc_softc *ahc, struct scb *scb, int target, 5185 char channel, int lun, u_int tag __unused, role_t role __unused) 5186 { 5187 int targ = SCB_GET_TARGET(ahc, scb); 5188 char chan = SCB_GET_CHANNEL(ahc, scb); 5189 int slun = SCB_GET_LUN(scb); 5190 int match; 5191 5192 match = ((chan == channel) || (channel == ALL_CHANNELS)); 5193 if (match != 0) 5194 match = ((targ == target) || (target == CAM_TARGET_WILDCARD)); 5195 if (match != 0) 5196 match = ((lun == slun) || (lun == CAM_LUN_WILDCARD)); 5197 if (match != 0) { 5198 #if 0 5199 #if AHC_TARGET_MODE 5200 int group; 5201 5202 group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code); 5203 if (role == ROLE_INITIATOR) { 5204 match = (group != XPT_FC_GROUP_TMODE) 5205 && ((tag == scb->hscb->tag) 5206 || (tag == SCB_LIST_NULL)); 5207 } else if (role == ROLE_TARGET) { 5208 match = (group == XPT_FC_GROUP_TMODE) 5209 && ((tag == scb->io_ctx->csio.tag_id) 5210 || (tag == SCB_LIST_NULL)); 5211 } 5212 #else /* !AHC_TARGET_MODE */ 5213 match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL)); 5214 #endif /* AHC_TARGET_MODE */ 5215 #endif 5216 } 5217 5218 return match; 5219 } 5220 5221 void 5222 ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 5223 { 5224 int target; 5225 char channel; 5226 int lun; 5227 5228 target = SCB_GET_TARGET(ahc, scb); 5229 lun = SCB_GET_LUN(scb); 5230 channel = SCB_GET_CHANNEL(ahc, scb); 5231 5232 ahc_search_qinfifo(ahc, target, channel, lun, 5233 /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN, 5234 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 5235 5236 ahc_platform_freeze_devq(ahc, scb); 5237 } 5238 5239 void 5240 ahc_qinfifo_requeue_tail(struct ahc_softc *ahc, struct scb *scb) 5241 { 5242 struct scb *prev_scb; 5243 5244 prev_scb = NULL; 5245 if (ahc_qinfifo_count(ahc) != 0) { 5246 u_int prev_tag; 5247 uint8_t prev_pos; 5248 5249 prev_pos = ahc->qinfifonext - 1; 5250 prev_tag = ahc->qinfifo[prev_pos]; 5251 prev_scb = ahc_lookup_scb(ahc, prev_tag); 5252 } 5253 ahc_qinfifo_requeue(ahc, prev_scb, scb); 5254 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 5255 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); 5256 } else { 5257 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); 5258 } 5259 } 5260 5261 static void 5262 ahc_qinfifo_requeue(struct ahc_softc *ahc, struct scb *prev_scb, 5263 struct scb *scb) 5264 { 5265 if (prev_scb == NULL) { 5266 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag); 5267 } else { 5268 prev_scb->hscb->next = scb->hscb->tag; 5269 ahc_sync_scb(ahc, prev_scb, 5270 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 5271 } 5272 ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag; 5273 scb->hscb->next = ahc->next_queued_scb->hscb->tag; 5274 ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 5275 } 5276 5277 static int 5278 ahc_qinfifo_count(struct ahc_softc *ahc) 5279 { 5280 uint8_t qinpos; 5281 uint8_t diff; 5282 5283 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 5284 qinpos = ahc_inb(ahc, SNSCB_QOFF); 5285 ahc_outb(ahc, SNSCB_QOFF, qinpos); 5286 } else 5287 qinpos = ahc_inb(ahc, QINPOS); 5288 diff = ahc->qinfifonext - qinpos; 5289 return (diff); 5290 } 5291 5292 int 5293 ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel, 5294 int lun, u_int tag, role_t role, uint32_t status, 5295 ahc_search_action action) 5296 { 5297 struct scb *scb; 5298 struct scb *prev_scb; 5299 uint8_t qinstart; 5300 uint8_t qinpos; 5301 uint8_t qintail; 5302 uint8_t next; 5303 uint8_t prev; 5304 uint8_t curscbptr; 5305 int found; 5306 int have_qregs; 5307 5308 qintail = ahc->qinfifonext; 5309 have_qregs = (ahc->features & AHC_QUEUE_REGS) != 0; 5310 if (have_qregs) { 5311 qinstart = ahc_inb(ahc, SNSCB_QOFF); 5312 ahc_outb(ahc, SNSCB_QOFF, qinstart); 5313 } else 5314 qinstart = ahc_inb(ahc, QINPOS); 5315 qinpos = qinstart; 5316 found = 0; 5317 prev_scb = NULL; 5318 5319 if (action == SEARCH_COMPLETE) { 5320 /* 5321 * Don't attempt to run any queued untagged transactions 5322 * until we are done with the abort process. 5323 */ 5324 ahc_freeze_untagged_queues(ahc); 5325 } 5326 5327 /* 5328 * Start with an empty queue. Entries that are not chosen 5329 * for removal will be re-added to the queue as we go. 5330 */ 5331 ahc->qinfifonext = qinpos; 5332 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag); 5333 5334 while (qinpos != qintail) { 5335 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinpos]); 5336 if (scb == NULL) { 5337 printf("qinpos = %d, SCB index = %d\n", 5338 qinpos, ahc->qinfifo[qinpos]); 5339 panic("Loop 1\n"); 5340 } 5341 5342 if (ahc_match_scb(ahc, scb, target, channel, lun, tag, role)) { 5343 /* 5344 * We found an scb that needs to be acted on. 5345 */ 5346 found++; 5347 switch (action) { 5348 case SEARCH_COMPLETE: 5349 { 5350 cam_status ostat; 5351 cam_status cstat; 5352 5353 ostat = ahc_get_transaction_status(scb); 5354 if (ostat == CAM_REQ_INPROG) 5355 ahc_set_transaction_status(scb, status); 5356 cstat = ahc_get_transaction_status(scb); 5357 if (cstat != CAM_REQ_CMP) 5358 ahc_freeze_scb(scb); 5359 if ((scb->flags & SCB_ACTIVE) == 0) 5360 printf("Inactive SCB in qinfifo\n"); 5361 ahc_done(ahc, scb); 5362 5363 /* FALLTHROUGH */ 5364 } 5365 case SEARCH_REMOVE: 5366 break; 5367 case SEARCH_COUNT: 5368 ahc_qinfifo_requeue(ahc, prev_scb, scb); 5369 prev_scb = scb; 5370 break; 5371 } 5372 } else { 5373 ahc_qinfifo_requeue(ahc, prev_scb, scb); 5374 prev_scb = scb; 5375 } 5376 qinpos++; 5377 } 5378 5379 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 5380 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); 5381 } else { 5382 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); 5383 } 5384 5385 if (action != SEARCH_COUNT 5386 && (found != 0) 5387 && (qinstart != ahc->qinfifonext)) { 5388 /* 5389 * The sequencer may be in the process of DMA'ing 5390 * down the SCB at the beginning of the queue. 5391 * This could be problematic if either the first, 5392 * or the second SCB is removed from the queue 5393 * (the first SCB includes a pointer to the "next" 5394 * SCB to DMA). If we have removed any entries, swap 5395 * the first element in the queue with the next HSCB 5396 * so the sequencer will notice that NEXT_QUEUED_SCB 5397 * has changed during its DMA attempt and will retry 5398 * the DMA. 5399 */ 5400 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinstart]); 5401 5402 if (scb == NULL) { 5403 printf("found = %d, qinstart = %d, qinfifionext = %d\n", 5404 found, qinstart, ahc->qinfifonext); 5405 panic("First/Second Qinfifo fixup\n"); 5406 } 5407 /* 5408 * ahc_swap_with_next_hscb forces our next pointer to 5409 * point to the reserved SCB for future commands. Save 5410 * and restore our original next pointer to maintain 5411 * queue integrity. 5412 */ 5413 next = scb->hscb->next; 5414 ahc->scb_data->scbindex[scb->hscb->tag] = NULL; 5415 ahc_swap_with_next_hscb(ahc, scb); 5416 scb->hscb->next = next; 5417 ahc->qinfifo[qinstart] = scb->hscb->tag; 5418 5419 /* Tell the card about the new head of the qinfifo. */ 5420 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag); 5421 5422 /* Fixup the tail "next" pointer. */ 5423 qintail = ahc->qinfifonext - 1; 5424 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qintail]); 5425 scb->hscb->next = ahc->next_queued_scb->hscb->tag; 5426 } 5427 5428 /* 5429 * Search waiting for selection list. 5430 */ 5431 curscbptr = ahc_inb(ahc, SCBPTR); 5432 next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */ 5433 prev = SCB_LIST_NULL; 5434 5435 while (next != SCB_LIST_NULL) { 5436 uint8_t scb_index; 5437 5438 ahc_outb(ahc, SCBPTR, next); 5439 scb_index = ahc_inb(ahc, SCB_TAG); 5440 if (scb_index >= ahc->scb_data->numscbs) { 5441 printf("Waiting List inconsistency. " 5442 "SCB index == %d, yet numscbs == %d.", 5443 scb_index, ahc->scb_data->numscbs); 5444 ahc_dump_card_state(ahc); 5445 panic("for safety"); 5446 } 5447 scb = ahc_lookup_scb(ahc, scb_index); 5448 if (scb == NULL) { 5449 printf("scb_index = %d, next = %d\n", 5450 scb_index, next); 5451 panic("Waiting List traversal\n"); 5452 } 5453 if (ahc_match_scb(ahc, scb, target, channel, 5454 lun, SCB_LIST_NULL, role)) { 5455 /* 5456 * We found an scb that needs to be acted on. 5457 */ 5458 found++; 5459 switch (action) { 5460 case SEARCH_COMPLETE: 5461 { 5462 cam_status ostat; 5463 cam_status cstat; 5464 5465 ostat = ahc_get_transaction_status(scb); 5466 if (ostat == CAM_REQ_INPROG) 5467 ahc_set_transaction_status(scb, status); 5468 cstat = ahc_get_transaction_status(scb); 5469 if (cstat != CAM_REQ_CMP) 5470 ahc_freeze_scb(scb); 5471 if ((scb->flags & SCB_ACTIVE) == 0) 5472 printf("Inactive SCB in Waiting List\n"); 5473 ahc_done(ahc, scb); 5474 /* FALLTHROUGH */ 5475 } 5476 case SEARCH_REMOVE: 5477 next = ahc_rem_wscb(ahc, next, prev); 5478 break; 5479 case SEARCH_COUNT: 5480 prev = next; 5481 next = ahc_inb(ahc, SCB_NEXT); 5482 break; 5483 } 5484 } else { 5485 5486 prev = next; 5487 next = ahc_inb(ahc, SCB_NEXT); 5488 } 5489 } 5490 ahc_outb(ahc, SCBPTR, curscbptr); 5491 5492 found += ahc_search_untagged_queues(ahc, /*ahc_io_ctx_t*/NULL, target, 5493 channel, lun, status, action); 5494 5495 if (action == SEARCH_COMPLETE) 5496 ahc_release_untagged_queues(ahc); 5497 return (found); 5498 } 5499 5500 int 5501 ahc_search_untagged_queues(struct ahc_softc *ahc, 5502 struct scsipi_xfer *xs __unused, int target, char channel, int lun, 5503 uint32_t status, ahc_search_action action) 5504 { 5505 struct scb *scb; 5506 int maxtarget; 5507 int found; 5508 int i; 5509 5510 if (action == SEARCH_COMPLETE) { 5511 /* 5512 * Don't attempt to run any queued untagged transactions 5513 * until we are done with the abort process. 5514 */ 5515 ahc_freeze_untagged_queues(ahc); 5516 } 5517 5518 found = 0; 5519 i = 0; 5520 if ((ahc->flags & AHC_SCB_BTT) == 0) { 5521 5522 maxtarget = 16; 5523 if (target != CAM_TARGET_WILDCARD) { 5524 5525 i = target; 5526 if (channel == 'B') 5527 i += 8; 5528 maxtarget = i + 1; 5529 } 5530 } else { 5531 maxtarget = 0; 5532 } 5533 5534 for (; i < maxtarget; i++) { 5535 struct scb_tailq *untagged_q; 5536 struct scb *next_scb; 5537 5538 untagged_q = &(ahc->untagged_queues[i]); 5539 next_scb = TAILQ_FIRST(untagged_q); 5540 while (next_scb != NULL) { 5541 5542 scb = next_scb; 5543 next_scb = TAILQ_NEXT(scb, links.tqe); 5544 5545 /* 5546 * The head of the list may be the currently 5547 * active untagged command for a device. 5548 * We're only searching for commands that 5549 * have not been started. A transaction 5550 * marked active but still in the qinfifo 5551 * is removed by the qinfifo scanning code 5552 * above. 5553 */ 5554 if ((scb->flags & SCB_ACTIVE) != 0) 5555 continue; 5556 5557 if (ahc_match_scb(ahc, scb, target, channel, lun, 5558 SCB_LIST_NULL, ROLE_INITIATOR) == 0 5559 /*|| (ctx != NULL && ctx != scb->io_ctx)*/) 5560 continue; 5561 5562 /* 5563 * We found an scb that needs to be acted on. 5564 */ 5565 found++; 5566 switch (action) { 5567 case SEARCH_COMPLETE: 5568 { 5569 cam_status ostat; 5570 cam_status cstat; 5571 5572 ostat = ahc_get_transaction_status(scb); 5573 if (ostat == CAM_REQ_INPROG) 5574 ahc_set_transaction_status(scb, status); 5575 cstat = ahc_get_transaction_status(scb); 5576 if (cstat != CAM_REQ_CMP) 5577 ahc_freeze_scb(scb); 5578 if ((scb->flags & SCB_ACTIVE) == 0) 5579 printf("Inactive SCB in untaggedQ\n"); 5580 ahc_done(ahc, scb); 5581 break; 5582 } 5583 case SEARCH_REMOVE: 5584 scb->flags &= ~SCB_UNTAGGEDQ; 5585 TAILQ_REMOVE(untagged_q, scb, links.tqe); 5586 break; 5587 case SEARCH_COUNT: 5588 break; 5589 } 5590 } 5591 } 5592 5593 if (action == SEARCH_COMPLETE) 5594 ahc_release_untagged_queues(ahc); 5595 return (found); 5596 } 5597 5598 int 5599 ahc_search_disc_list(struct ahc_softc *ahc, int target, char channel, 5600 int lun, u_int tag, int stop_on_first, int remove, 5601 int save_state) 5602 { 5603 struct scb *scbp; 5604 u_int next; 5605 u_int prev; 5606 u_int count; 5607 u_int active_scb; 5608 5609 count = 0; 5610 next = ahc_inb(ahc, DISCONNECTED_SCBH); 5611 prev = SCB_LIST_NULL; 5612 5613 if (save_state) { 5614 /* restore this when we're done */ 5615 active_scb = ahc_inb(ahc, SCBPTR); 5616 } else 5617 /* Silence compiler */ 5618 active_scb = SCB_LIST_NULL; 5619 5620 while (next != SCB_LIST_NULL) { 5621 u_int scb_index; 5622 5623 ahc_outb(ahc, SCBPTR, next); 5624 scb_index = ahc_inb(ahc, SCB_TAG); 5625 if (scb_index >= ahc->scb_data->numscbs) { 5626 printf("Disconnected List inconsistency. " 5627 "SCB index == %d, yet numscbs == %d.", 5628 scb_index, ahc->scb_data->numscbs); 5629 ahc_dump_card_state(ahc); 5630 panic("for safety"); 5631 } 5632 5633 if (next == prev) { 5634 panic("Disconnected List Loop. " 5635 "cur SCBPTR == %x, prev SCBPTR == %x.", 5636 next, prev); 5637 } 5638 scbp = ahc_lookup_scb(ahc, scb_index); 5639 if (ahc_match_scb(ahc, scbp, target, channel, lun, 5640 tag, ROLE_INITIATOR)) { 5641 count++; 5642 if (remove) { 5643 next = 5644 ahc_rem_scb_from_disc_list(ahc, prev, next); 5645 } else { 5646 prev = next; 5647 next = ahc_inb(ahc, SCB_NEXT); 5648 } 5649 if (stop_on_first) 5650 break; 5651 } else { 5652 prev = next; 5653 next = ahc_inb(ahc, SCB_NEXT); 5654 } 5655 } 5656 if (save_state) 5657 ahc_outb(ahc, SCBPTR, active_scb); 5658 return (count); 5659 } 5660 5661 /* 5662 * Remove an SCB from the on chip list of disconnected transactions. 5663 * This is empty/unused if we are not performing SCB paging. 5664 */ 5665 static u_int 5666 ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, u_int prev, u_int scbptr) 5667 { 5668 u_int next; 5669 5670 ahc_outb(ahc, SCBPTR, scbptr); 5671 next = ahc_inb(ahc, SCB_NEXT); 5672 5673 ahc_outb(ahc, SCB_CONTROL, 0); 5674 5675 ahc_add_curscb_to_free_list(ahc); 5676 5677 if (prev != SCB_LIST_NULL) { 5678 ahc_outb(ahc, SCBPTR, prev); 5679 ahc_outb(ahc, SCB_NEXT, next); 5680 } else 5681 ahc_outb(ahc, DISCONNECTED_SCBH, next); 5682 5683 return (next); 5684 } 5685 5686 /* 5687 * Add the SCB as selected by SCBPTR onto the on chip list of 5688 * free hardware SCBs. This list is empty/unused if we are not 5689 * performing SCB paging. 5690 */ 5691 static void 5692 ahc_add_curscb_to_free_list(struct ahc_softc *ahc) 5693 { 5694 /* 5695 * Invalidate the tag so that our abort 5696 * routines don't think it's active. 5697 */ 5698 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL); 5699 5700 if ((ahc->flags & AHC_PAGESCBS) != 0) { 5701 ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH)); 5702 ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR)); 5703 } 5704 } 5705 5706 /* 5707 * Manipulate the waiting for selection list and return the 5708 * scb that follows the one that we remove. 5709 */ 5710 static u_int 5711 ahc_rem_wscb(struct ahc_softc *ahc, u_int scbpos, u_int prev) 5712 { 5713 u_int curscb, next; 5714 5715 /* 5716 * Select the SCB we want to abort and 5717 * pull the next pointer out of it. 5718 */ 5719 curscb = ahc_inb(ahc, SCBPTR); 5720 ahc_outb(ahc, SCBPTR, scbpos); 5721 next = ahc_inb(ahc, SCB_NEXT); 5722 5723 /* Clear the necessary fields */ 5724 ahc_outb(ahc, SCB_CONTROL, 0); 5725 5726 ahc_add_curscb_to_free_list(ahc); 5727 5728 /* update the waiting list */ 5729 if (prev == SCB_LIST_NULL) { 5730 /* First in the list */ 5731 ahc_outb(ahc, WAITING_SCBH, next); 5732 5733 /* 5734 * Ensure we aren't attempting to perform 5735 * selection for this entry. 5736 */ 5737 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); 5738 } else { 5739 /* 5740 * Select the scb that pointed to us 5741 * and update its next pointer. 5742 */ 5743 ahc_outb(ahc, SCBPTR, prev); 5744 ahc_outb(ahc, SCB_NEXT, next); 5745 } 5746 5747 /* 5748 * Point us back at the original scb position. 5749 */ 5750 ahc_outb(ahc, SCBPTR, curscb); 5751 return next; 5752 } 5753 5754 /******************************** Error Handling ******************************/ 5755 /* 5756 * Abort all SCBs that match the given description (target/channel/lun/tag), 5757 * setting their status to the passed in status if the status has not already 5758 * been modified from CAM_REQ_INPROG. This routine assumes that the sequencer 5759 * is paused before it is called. 5760 */ 5761 int 5762 ahc_abort_scbs(struct ahc_softc *ahc, int target, char channel, 5763 int lun, u_int tag, role_t role, uint32_t status) 5764 { 5765 struct scb *scbp; 5766 struct scb *scbp_next; 5767 u_int active_scb; 5768 int i, j; 5769 int maxtarget; 5770 int minlun; 5771 int maxlun; 5772 5773 int found; 5774 5775 /* 5776 * Don't attempt to run any queued untagged transactions 5777 * until we are done with the abort process. 5778 */ 5779 ahc_freeze_untagged_queues(ahc); 5780 5781 /* restore this when we're done */ 5782 active_scb = ahc_inb(ahc, SCBPTR); 5783 5784 found = ahc_search_qinfifo(ahc, target, channel, lun, SCB_LIST_NULL, 5785 role, CAM_REQUEUE_REQ, SEARCH_COMPLETE); 5786 5787 /* 5788 * Clean out the busy target table for any untagged commands. 5789 */ 5790 i = 0; 5791 maxtarget = 16; 5792 if (target != CAM_TARGET_WILDCARD) { 5793 i = target; 5794 if (channel == 'B') 5795 i += 8; 5796 maxtarget = i + 1; 5797 } 5798 5799 if (lun == CAM_LUN_WILDCARD) { 5800 5801 /* 5802 * Unless we are using an SCB based 5803 * busy targets table, there is only 5804 * one table entry for all luns of 5805 * a target. 5806 */ 5807 minlun = 0; 5808 maxlun = 1; 5809 if ((ahc->flags & AHC_SCB_BTT) != 0) 5810 maxlun = AHC_NUM_LUNS; 5811 } else { 5812 minlun = lun; 5813 maxlun = lun + 1; 5814 } 5815 5816 if (role != ROLE_TARGET) { 5817 for (;i < maxtarget; i++) { 5818 for (j = minlun;j < maxlun; j++) { 5819 u_int scbid; 5820 u_int tcl; 5821 5822 tcl = BUILD_TCL(i << 4, j); 5823 scbid = ahc_index_busy_tcl(ahc, tcl); 5824 scbp = ahc_lookup_scb(ahc, scbid); 5825 if (scbp == NULL 5826 || ahc_match_scb(ahc, scbp, target, channel, 5827 lun, tag, role) == 0) 5828 continue; 5829 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, j)); 5830 } 5831 } 5832 5833 /* 5834 * Go through the disconnected list and remove any entries we 5835 * have queued for completion, 0'ing their control byte too. 5836 * We save the active SCB and restore it ourselves, so there 5837 * is no reason for this search to restore it too. 5838 */ 5839 ahc_search_disc_list(ahc, target, channel, lun, tag, 5840 /*stop_on_first*/FALSE, /*remove*/TRUE, 5841 /*save_state*/FALSE); 5842 } 5843 5844 /* 5845 * Go through the hardware SCB array looking for commands that 5846 * were active but not on any list. In some cases, these remnants 5847 * might not still have mappings in the scbindex array (e.g. unexpected 5848 * bus free with the same scb queued for an abort). Don't hold this 5849 * against them. 5850 */ 5851 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 5852 u_int scbid; 5853 5854 ahc_outb(ahc, SCBPTR, i); 5855 scbid = ahc_inb(ahc, SCB_TAG); 5856 scbp = ahc_lookup_scb(ahc, scbid); 5857 if ((scbp == NULL && scbid != SCB_LIST_NULL) 5858 || (scbp != NULL 5859 && ahc_match_scb(ahc, scbp, target, channel, lun, tag, role))) 5860 ahc_add_curscb_to_free_list(ahc); 5861 } 5862 5863 /* 5864 * Go through the pending CCB list and look for 5865 * commands for this target that are still active. 5866 * These are other tagged commands that were 5867 * disconnected when the reset occurred. 5868 */ 5869 scbp_next = LIST_FIRST(&ahc->pending_scbs); 5870 while (scbp_next != NULL) { 5871 scbp = scbp_next; 5872 scbp_next = LIST_NEXT(scbp, pending_links); 5873 if (ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)) { 5874 cam_status ostat; 5875 5876 ostat = ahc_get_transaction_status(scbp); 5877 if (ostat == CAM_REQ_INPROG) 5878 ahc_set_transaction_status(scbp, status); 5879 if (ahc_get_transaction_status(scbp) != CAM_REQ_CMP) 5880 ahc_freeze_scb(scbp); 5881 if ((scbp->flags & SCB_ACTIVE) == 0) 5882 printf("Inactive SCB on pending list\n"); 5883 ahc_done(ahc, scbp); 5884 found++; 5885 } 5886 } 5887 ahc_outb(ahc, SCBPTR, active_scb); 5888 ahc_platform_abort_scbs(ahc, target, channel, lun, tag, role, status); 5889 ahc_release_untagged_queues(ahc); 5890 return found; 5891 } 5892 5893 static void 5894 ahc_reset_current_bus(struct ahc_softc *ahc) 5895 { 5896 uint8_t scsiseq; 5897 5898 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST); 5899 scsiseq = ahc_inb(ahc, SCSISEQ); 5900 ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO); 5901 ahc_flush_device_writes(ahc); 5902 ahc_delay(AHC_BUSRESET_DELAY); 5903 /* Turn off the bus reset */ 5904 ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO); 5905 5906 ahc_clear_intstat(ahc); 5907 5908 /* Re-enable reset interrupts */ 5909 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST); 5910 } 5911 5912 int 5913 ahc_reset_channel(struct ahc_softc *ahc, char channel, int initiate_reset) 5914 { 5915 struct ahc_devinfo dinfo; 5916 u_int initiator, target, max_scsiid; 5917 u_int sblkctl; 5918 u_int scsiseq; 5919 u_int simode1; 5920 int found; 5921 int restart_needed; 5922 char cur_channel; 5923 5924 ahc->pending_device = NULL; 5925 5926 ahc_compile_devinfo(&dinfo, 5927 CAM_TARGET_WILDCARD, 5928 CAM_TARGET_WILDCARD, 5929 CAM_LUN_WILDCARD, 5930 channel, ROLE_UNKNOWN); 5931 ahc_pause(ahc); 5932 5933 /* Make sure the sequencer is in a safe location. */ 5934 ahc_clear_critical_section(ahc); 5935 5936 /* 5937 * Run our command complete fifos to ensure that we perform 5938 * completion processing on any commands that 'completed' 5939 * before the reset occurred. 5940 */ 5941 ahc_run_qoutfifo(ahc); 5942 #if AHC_TARGET_MODE 5943 /* 5944 * XXX - In Twin mode, the tqinfifo may have commands 5945 * for an unaffected channel in it. However, if 5946 * we have run out of ATIO resources to drain that 5947 * queue, we may not get them all out here. Further, 5948 * the blocked transactions for the reset channel 5949 * should just be killed off, irrespecitve of whether 5950 * we are blocked on ATIO resources. Write a routine 5951 * to compact the tqinfifo appropriately. 5952 */ 5953 if ((ahc->flags & AHC_TARGETROLE) != 0) { 5954 ahc_run_tqinfifo(ahc, /*paused*/TRUE); 5955 } 5956 #endif 5957 5958 /* 5959 * Reset the bus if we are initiating this reset 5960 */ 5961 sblkctl = ahc_inb(ahc, SBLKCTL); 5962 cur_channel = 'A'; 5963 if ((ahc->features & AHC_TWIN) != 0 5964 && ((sblkctl & SELBUSB) != 0)) 5965 cur_channel = 'B'; 5966 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); 5967 if (cur_channel != channel) { 5968 /* Case 1: Command for another bus is active 5969 * Stealthily reset the other bus without 5970 * upsetting the current bus. 5971 */ 5972 ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB); 5973 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST); 5974 #if AHC_TARGET_MODE 5975 /* 5976 * Bus resets clear ENSELI, so we cannot 5977 * defer re-enabling bus reset interrupts 5978 * if we are in target mode. 5979 */ 5980 if ((ahc->flags & AHC_TARGETROLE) != 0) 5981 simode1 |= ENSCSIRST; 5982 #endif 5983 ahc_outb(ahc, SIMODE1, simode1); 5984 if (initiate_reset) 5985 ahc_reset_current_bus(ahc); 5986 ahc_clear_intstat(ahc); 5987 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP)); 5988 ahc_outb(ahc, SBLKCTL, sblkctl); 5989 restart_needed = FALSE; 5990 } else { 5991 /* Case 2: A command from this bus is active or we're idle */ 5992 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST); 5993 #if AHC_TARGET_MODE 5994 /* 5995 * Bus resets clear ENSELI, so we cannot 5996 * defer re-enabling bus reset interrupts 5997 * if we are in target mode. 5998 */ 5999 if ((ahc->flags & AHC_TARGETROLE) != 0) 6000 simode1 |= ENSCSIRST; 6001 #endif 6002 ahc_outb(ahc, SIMODE1, simode1); 6003 if (initiate_reset) 6004 ahc_reset_current_bus(ahc); 6005 ahc_clear_intstat(ahc); 6006 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP)); 6007 restart_needed = TRUE; 6008 } 6009 6010 /* 6011 * Clean up all the state information for the 6012 * pending transactions on this bus. 6013 */ 6014 found = ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, channel, 6015 CAM_LUN_WILDCARD, SCB_LIST_NULL, 6016 ROLE_UNKNOWN, CAM_SCSI_BUS_RESET); 6017 6018 max_scsiid = (ahc->features & AHC_WIDE) ? 15 : 7; 6019 6020 #ifdef AHC_TARGET_MODE 6021 /* 6022 * Send an immediate notify ccb to all target more peripheral 6023 * drivers affected by this action. 6024 */ 6025 for (target = 0; target <= max_scsiid; target++) { 6026 struct ahc_tmode_tstate* tstate; 6027 u_int lun; 6028 6029 tstate = ahc->enabled_targets[target]; 6030 if (tstate == NULL) 6031 continue; 6032 for (lun = 0; lun < AHC_NUM_LUNS; lun++) { 6033 struct ahc_tmode_lstate* lstate; 6034 6035 lstate = tstate->enabled_luns[lun]; 6036 if (lstate == NULL) 6037 continue; 6038 6039 ahc_queue_lstate_event(ahc, lstate, CAM_TARGET_WILDCARD, 6040 EVENT_TYPE_BUS_RESET, /*arg*/0); 6041 ahc_send_lstate_events(ahc, lstate); 6042 } 6043 } 6044 #endif 6045 /* 6046 * Revert to async/narrow transfers until we renegotiate. 6047 */ 6048 for (target = 0; target <= max_scsiid; target++) { 6049 6050 if (ahc->enabled_targets[target] == NULL) 6051 continue; 6052 for (initiator = 0; initiator <= max_scsiid; initiator++) { 6053 struct ahc_devinfo devinfo; 6054 6055 ahc_compile_devinfo(&devinfo, target, initiator, 6056 CAM_LUN_WILDCARD, 6057 channel, ROLE_UNKNOWN); 6058 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 6059 AHC_TRANS_CUR, /*paused*/TRUE); 6060 ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL, 6061 /*period*/0, /*offset*/0, 6062 /*ppr_options*/0, AHC_TRANS_CUR, 6063 /*paused*/TRUE); 6064 } 6065 } 6066 6067 if (restart_needed) 6068 ahc_restart(ahc); 6069 else 6070 ahc_unpause(ahc); 6071 return found; 6072 } 6073 6074 6075 /***************************** Residual Processing ****************************/ 6076 /* 6077 * Calculate the residual for a just completed SCB. 6078 */ 6079 void 6080 ahc_calc_residual(struct ahc_softc *ahc __unused, struct scb *scb) 6081 { 6082 struct hardware_scb *hscb; 6083 struct status_pkt *spkt; 6084 uint32_t sgptr; 6085 uint32_t resid_sgptr; 6086 uint32_t resid; 6087 6088 /* 6089 * 5 cases. 6090 * 1) No residual. 6091 * SG_RESID_VALID clear in sgptr. 6092 * 2) Transferless command 6093 * 3) Never performed any transfers. 6094 * sgptr has SG_FULL_RESID set. 6095 * 4) No residual but target did not 6096 * save data pointers after the 6097 * last transfer, so sgptr was 6098 * never updated. 6099 * 5) We have a partial residual. 6100 * Use residual_sgptr to determine 6101 * where we are. 6102 */ 6103 6104 hscb = scb->hscb; 6105 sgptr = ahc_le32toh(hscb->sgptr); 6106 if ((sgptr & SG_RESID_VALID) == 0) 6107 /* Case 1 */ 6108 return; 6109 sgptr &= ~SG_RESID_VALID; 6110 6111 if ((sgptr & SG_LIST_NULL) != 0) 6112 /* Case 2 */ 6113 return; 6114 6115 spkt = &hscb->shared_data.status; 6116 resid_sgptr = ahc_le32toh(spkt->residual_sg_ptr); 6117 if ((sgptr & SG_FULL_RESID) != 0) { 6118 /* Case 3 */ 6119 resid = ahc_get_transfer_length(scb); 6120 } else if ((resid_sgptr & SG_LIST_NULL) != 0) { 6121 /* Case 4 */ 6122 return; 6123 } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) { 6124 panic("Bogus resid sgptr value 0x%x\n", resid_sgptr); 6125 } else { 6126 struct ahc_dma_seg *sg; 6127 6128 /* 6129 * Remainder of the SG where the transfer 6130 * stopped. 6131 */ 6132 resid = ahc_le32toh(spkt->residual_datacnt) & AHC_SG_LEN_MASK; 6133 sg = ahc_sg_bus_to_virt(scb, resid_sgptr & SG_PTR_MASK); 6134 6135 /* The residual sg_ptr always points to the next sg */ 6136 sg--; 6137 6138 /* 6139 * Add up the contents of all residual 6140 * SG segments that are after the SG where 6141 * the transfer stopped. 6142 */ 6143 while ((ahc_le32toh(sg->len) & AHC_DMA_LAST_SEG) == 0) { 6144 sg++; 6145 resid += ahc_le32toh(sg->len) & AHC_SG_LEN_MASK; 6146 } 6147 } 6148 if ((scb->flags & SCB_SENSE) == 0) 6149 ahc_set_residual(scb, resid); 6150 else 6151 ahc_set_sense_residual(scb, resid); 6152 6153 #ifdef AHC_DEBUG 6154 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 6155 ahc_print_path(ahc, scb); 6156 printf("Handled %sResidual of %d bytes\n", 6157 (scb->flags & SCB_SENSE) ? "Sense " : "", resid); 6158 } 6159 #endif 6160 } 6161 6162 /******************************* Target Mode **********************************/ 6163 #ifdef AHC_TARGET_MODE 6164 /* 6165 * Add a target mode event to this lun's queue 6166 */ 6167 static void 6168 ahc_queue_lstate_event(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate, 6169 u_int initiator_id, u_int event_type, u_int event_arg) 6170 { 6171 struct ahc_tmode_event *event; 6172 int pending; 6173 6174 xpt_freeze_devq(lstate->path, /*count*/1); 6175 if (lstate->event_w_idx >= lstate->event_r_idx) 6176 pending = lstate->event_w_idx - lstate->event_r_idx; 6177 else 6178 pending = AHC_TMODE_EVENT_BUFFER_SIZE + 1 6179 - (lstate->event_r_idx - lstate->event_w_idx); 6180 6181 if (event_type == EVENT_TYPE_BUS_RESET 6182 || event_type == MSG_BUS_DEV_RESET) { 6183 /* 6184 * Any earlier events are irrelevant, so reset our buffer. 6185 * This has the effect of allowing us to deal with reset 6186 * floods (an external device holding down the reset line) 6187 * without losing the event that is really interesting. 6188 */ 6189 lstate->event_r_idx = 0; 6190 lstate->event_w_idx = 0; 6191 xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE); 6192 } 6193 6194 if (pending == AHC_TMODE_EVENT_BUFFER_SIZE) { 6195 xpt_print_path(lstate->path); 6196 printf("immediate event %x:%x lost\n", 6197 lstate->event_buffer[lstate->event_r_idx].event_type, 6198 lstate->event_buffer[lstate->event_r_idx].event_arg); 6199 lstate->event_r_idx++; 6200 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE) 6201 lstate->event_r_idx = 0; 6202 xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE); 6203 } 6204 6205 event = &lstate->event_buffer[lstate->event_w_idx]; 6206 event->initiator_id = initiator_id; 6207 event->event_type = event_type; 6208 event->event_arg = event_arg; 6209 lstate->event_w_idx++; 6210 if (lstate->event_w_idx == AHC_TMODE_EVENT_BUFFER_SIZE) 6211 lstate->event_w_idx = 0; 6212 } 6213 6214 /* 6215 * Send any target mode events queued up waiting 6216 * for immediate notify resources. 6217 */ 6218 void 6219 ahc_send_lstate_events(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate) 6220 { 6221 struct ccb_hdr *ccbh; 6222 struct ccb_immed_notify *inot; 6223 6224 while (lstate->event_r_idx != lstate->event_w_idx 6225 && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) { 6226 struct ahc_tmode_event *event; 6227 6228 event = &lstate->event_buffer[lstate->event_r_idx]; 6229 SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle); 6230 inot = (struct ccb_immed_notify *)ccbh; 6231 switch (event->event_type) { 6232 case EVENT_TYPE_BUS_RESET: 6233 ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN; 6234 break; 6235 default: 6236 ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN; 6237 inot->message_args[0] = event->event_type; 6238 inot->message_args[1] = event->event_arg; 6239 break; 6240 } 6241 inot->initiator_id = event->initiator_id; 6242 inot->sense_len = 0; 6243 xpt_done((union ccb *)inot); 6244 lstate->event_r_idx++; 6245 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE) 6246 lstate->event_r_idx = 0; 6247 } 6248 } 6249 #endif 6250 6251 /******************** Sequencer Program Patching/Download *********************/ 6252 6253 #ifdef AHC_DUMP_SEQ 6254 void 6255 ahc_dumpseq(struct ahc_softc* ahc) 6256 { 6257 int i; 6258 int max_prog; 6259 6260 if ((ahc->chip & AHC_BUS_MASK) < AHC_PCI) 6261 max_prog = 448; 6262 else if ((ahc->features & AHC_ULTRA2) != 0) 6263 max_prog = 768; 6264 else 6265 max_prog = 512; 6266 6267 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); 6268 ahc_outb(ahc, SEQADDR0, 0); 6269 ahc_outb(ahc, SEQADDR1, 0); 6270 for (i = 0; i < max_prog; i++) { 6271 uint8_t ins_bytes[4]; 6272 6273 ahc_insb(ahc, SEQRAM, ins_bytes, 4); 6274 printf("0x%08x\n", ins_bytes[0] << 24 6275 | ins_bytes[1] << 16 6276 | ins_bytes[2] << 8 6277 | ins_bytes[3]); 6278 } 6279 } 6280 #endif 6281 6282 static void 6283 ahc_loadseq(struct ahc_softc *ahc) 6284 { 6285 struct cs cs_table[num_critical_sections]; 6286 u_int begin_set[num_critical_sections]; 6287 u_int end_set[num_critical_sections]; 6288 struct patch *cur_patch; 6289 u_int cs_count; 6290 u_int cur_cs; 6291 u_int i; 6292 int downloaded; 6293 u_int skip_addr; 6294 u_int sg_prefetch_cnt; 6295 uint8_t download_consts[7]; 6296 6297 /* 6298 * Start out with 0 critical sections 6299 * that apply to this firmware load. 6300 */ 6301 cs_count = 0; 6302 cur_cs = 0; 6303 memset(begin_set, 0, sizeof(begin_set)); 6304 memset(end_set, 0, sizeof(end_set)); 6305 6306 /* Setup downloadable constant table */ 6307 download_consts[QOUTFIFO_OFFSET] = 0; 6308 if (ahc->targetcmds != NULL) 6309 download_consts[QOUTFIFO_OFFSET] += 32; 6310 download_consts[QINFIFO_OFFSET] = download_consts[QOUTFIFO_OFFSET] + 1; 6311 download_consts[CACHESIZE_MASK] = ahc->pci_cachesize - 1; 6312 download_consts[INVERTED_CACHESIZE_MASK] = ~(ahc->pci_cachesize - 1); 6313 sg_prefetch_cnt = ahc->pci_cachesize; 6314 if (sg_prefetch_cnt < (2 * sizeof(struct ahc_dma_seg))) 6315 sg_prefetch_cnt = 2 * sizeof(struct ahc_dma_seg); 6316 download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt; 6317 download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_cnt - 1); 6318 download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_cnt - 1); 6319 6320 cur_patch = patches; 6321 downloaded = 0; 6322 skip_addr = 0; 6323 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); 6324 ahc_outb(ahc, SEQADDR0, 0); 6325 ahc_outb(ahc, SEQADDR1, 0); 6326 6327 for (i = 0; i < sizeof(seqprog)/4; i++) { 6328 if (ahc_check_patch(ahc, &cur_patch, i, &skip_addr) == 0) { 6329 /* 6330 * Don't download this instruction as it 6331 * is in a patch that was removed. 6332 */ 6333 continue; 6334 } 6335 /* 6336 * Move through the CS table until we find a CS 6337 * that might apply to this instruction. 6338 */ 6339 for (; cur_cs < num_critical_sections; cur_cs++) { 6340 if (critical_sections[cur_cs].end <= i) { 6341 if (begin_set[cs_count] == TRUE 6342 && end_set[cs_count] == FALSE) { 6343 cs_table[cs_count].end = downloaded; 6344 end_set[cs_count] = TRUE; 6345 cs_count++; 6346 } 6347 continue; 6348 } 6349 if (critical_sections[cur_cs].begin <= i 6350 && begin_set[cs_count] == FALSE) { 6351 cs_table[cs_count].begin = downloaded; 6352 begin_set[cs_count] = TRUE; 6353 } 6354 break; 6355 } 6356 ahc_download_instr(ahc, i, download_consts); 6357 downloaded++; 6358 } 6359 6360 ahc->num_critical_sections = cs_count; 6361 if (cs_count != 0) { 6362 6363 cs_count *= sizeof(struct cs); 6364 ahc->critical_sections = malloc(cs_count, M_DEVBUF, M_NOWAIT); 6365 if (ahc->critical_sections == NULL) 6366 panic("ahc_loadseq: Could not malloc"); 6367 memcpy(ahc->critical_sections, cs_table, cs_count); 6368 } 6369 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE); 6370 ahc_restart(ahc); 6371 6372 if (bootverbose) { 6373 printf(" %d instructions downloaded\n", downloaded); 6374 printf("%s: Features 0x%x, Bugs 0x%x, Flags 0x%x\n", 6375 ahc_name(ahc), ahc->features, ahc->bugs, ahc->flags); 6376 } 6377 } 6378 6379 static int 6380 ahc_check_patch(struct ahc_softc *ahc, struct patch **start_patch, 6381 u_int start_instr, u_int *skip_addr) 6382 { 6383 struct patch *cur_patch; 6384 struct patch *last_patch; 6385 u_int num_patches; 6386 6387 num_patches = sizeof(patches)/sizeof(struct patch); 6388 last_patch = &patches[num_patches]; 6389 cur_patch = *start_patch; 6390 6391 while (cur_patch < last_patch && start_instr == cur_patch->begin) { 6392 6393 if (cur_patch->patch_func(ahc) == 0) { 6394 6395 /* Start rejecting code */ 6396 *skip_addr = start_instr + cur_patch->skip_instr; 6397 cur_patch += cur_patch->skip_patch; 6398 } else { 6399 /* Accepted this patch. Advance to the next 6400 * one and wait for our intruction pointer to 6401 * hit this point. 6402 */ 6403 cur_patch++; 6404 } 6405 } 6406 6407 *start_patch = cur_patch; 6408 if (start_instr < *skip_addr) 6409 /* Still skipping */ 6410 return (0); 6411 6412 return (1); 6413 } 6414 6415 static void 6416 ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts) 6417 { 6418 union ins_formats instr; 6419 struct ins_format1 *fmt1_ins; 6420 struct ins_format3 *fmt3_ins; 6421 u_int opcode; 6422 6423 /* 6424 * The firmware is always compiled into a little endian format. 6425 */ 6426 instr.integer = ahc_le32toh(*(uint32_t*)&seqprog[instrptr * 4]); 6427 6428 fmt1_ins = &instr.format1; 6429 fmt3_ins = NULL; 6430 6431 /* Pull the opcode */ 6432 opcode = instr.format1.opcode; 6433 switch (opcode) { 6434 case AIC_OP_JMP: 6435 case AIC_OP_JC: 6436 case AIC_OP_JNC: 6437 case AIC_OP_CALL: 6438 case AIC_OP_JNE: 6439 case AIC_OP_JNZ: 6440 case AIC_OP_JE: 6441 case AIC_OP_JZ: 6442 { 6443 struct patch *cur_patch; 6444 int address_offset; 6445 u_int address; 6446 u_int skip_addr; 6447 u_int i; 6448 6449 fmt3_ins = &instr.format3; 6450 address_offset = 0; 6451 address = fmt3_ins->address; 6452 cur_patch = patches; 6453 skip_addr = 0; 6454 for (i = 0; i < address;) { 6455 ahc_check_patch(ahc, &cur_patch, i, &skip_addr); 6456 6457 if (skip_addr > i) { 6458 int end_addr; 6459 6460 end_addr = MIN(address, skip_addr); 6461 address_offset += end_addr - i; 6462 i = skip_addr; 6463 } else { 6464 i++; 6465 } 6466 } 6467 address -= address_offset; 6468 fmt3_ins->address = address; 6469 /* FALLTHROUGH */ 6470 } 6471 case AIC_OP_OR: 6472 case AIC_OP_AND: 6473 case AIC_OP_XOR: 6474 case AIC_OP_ADD: 6475 case AIC_OP_ADC: 6476 case AIC_OP_BMOV: 6477 if (fmt1_ins->parity != 0) { 6478 fmt1_ins->immediate = dconsts[fmt1_ins->immediate]; 6479 } 6480 fmt1_ins->parity = 0; 6481 if ((ahc->features & AHC_CMD_CHAN) == 0 6482 && opcode == AIC_OP_BMOV) { 6483 /* 6484 * Block move was added at the same time 6485 * as the command channel. Verify that 6486 * this is only a move of a single element 6487 * and convert the BMOV to a MOV 6488 * (AND with an immediate of FF). 6489 */ 6490 if (fmt1_ins->immediate != 1) 6491 panic("%s: BMOV not supported\n", 6492 ahc_name(ahc)); 6493 fmt1_ins->opcode = AIC_OP_AND; 6494 fmt1_ins->immediate = 0xff; 6495 } 6496 /* FALLTHROUGH */ 6497 case AIC_OP_ROL: 6498 if ((ahc->features & AHC_ULTRA2) != 0) { 6499 int i, count; 6500 6501 /* Calculate odd parity for the instruction */ 6502 for (i = 0, count = 0; i < 31; i++) { 6503 uint32_t mask; 6504 6505 mask = 0x01 << i; 6506 if ((instr.integer & mask) != 0) 6507 count++; 6508 } 6509 if ((count & 0x01) == 0) 6510 instr.format1.parity = 1; 6511 } else { 6512 /* Compress the instruction for older sequencers */ 6513 if (fmt3_ins != NULL) { 6514 instr.integer = 6515 fmt3_ins->immediate 6516 | (fmt3_ins->source << 8) 6517 | (fmt3_ins->address << 16) 6518 | (fmt3_ins->opcode << 25); 6519 } else { 6520 instr.integer = 6521 fmt1_ins->immediate 6522 | (fmt1_ins->source << 8) 6523 | (fmt1_ins->destination << 16) 6524 | (fmt1_ins->ret << 24) 6525 | (fmt1_ins->opcode << 25); 6526 } 6527 } 6528 /* The sequencer is a little endian CPU */ 6529 instr.integer = ahc_htole32(instr.integer); 6530 ahc_outsb(ahc, SEQRAM, instr.bytes, 4); 6531 break; 6532 default: 6533 panic("Unknown opcode encountered in seq program"); 6534 break; 6535 } 6536 } 6537 6538 int 6539 ahc_print_register(ahc_reg_parse_entry_t *table, u_int num_entries, 6540 const char *name, u_int address __unused, u_int value, 6541 u_int *cur_column, u_int wrap_point) 6542 { 6543 int printed; 6544 u_int printed_mask; 6545 char line[1024]; 6546 6547 line[0] = 0; 6548 6549 if (cur_column != NULL && *cur_column >= wrap_point) { 6550 printf("\n"); 6551 *cur_column = 0; 6552 } 6553 printed = snprintf(line, sizeof(line), "%s[0x%x]", name, value); 6554 if (table == NULL) { 6555 printed += snprintf(&line[printed], (sizeof line) - printed, 6556 " "); 6557 printf("%s", line); 6558 if (cur_column != NULL) 6559 *cur_column += printed; 6560 return (printed); 6561 } 6562 printed_mask = 0; 6563 while (printed_mask != 0xFF) { 6564 int entry; 6565 6566 for (entry = 0; entry < num_entries; entry++) { 6567 if (((value & table[entry].mask) 6568 != table[entry].value) 6569 || ((printed_mask & table[entry].mask) 6570 == table[entry].mask)) 6571 continue; 6572 printed += snprintf(&line[printed], 6573 (sizeof line) - printed, "%s%s", 6574 printed_mask == 0 ? ":(" : "|", 6575 table[entry].name); 6576 printed_mask |= table[entry].mask; 6577 6578 break; 6579 } 6580 if (entry >= num_entries) 6581 break; 6582 } 6583 if (printed_mask != 0) 6584 printed += snprintf(&line[printed], 6585 (sizeof line) - printed, ") "); 6586 else 6587 printed += snprintf(&line[printed], 6588 (sizeof line) - printed, " "); 6589 if (cur_column != NULL) 6590 *cur_column += printed; 6591 printf("%s", line); 6592 6593 return (printed); 6594 } 6595 6596 void 6597 ahc_dump_card_state(struct ahc_softc *ahc) 6598 { 6599 struct scb *scb; 6600 struct scb_tailq *untagged_q; 6601 u_int cur_col; 6602 int paused; 6603 int target; 6604 int maxtarget; 6605 int i; 6606 uint8_t last_phase; 6607 uint8_t qinpos; 6608 uint8_t qintail; 6609 uint8_t qoutpos; 6610 uint8_t scb_index; 6611 uint8_t saved_scbptr; 6612 6613 if (ahc_is_paused(ahc)) { 6614 paused = 1; 6615 } else { 6616 paused = 0; 6617 ahc_pause(ahc); 6618 } 6619 6620 saved_scbptr = ahc_inb(ahc, SCBPTR); 6621 last_phase = ahc_inb(ahc, LASTPHASE); 6622 printf(">>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<\n" 6623 "%s: Dumping Card State %s, at SEQADDR 0x%x\n", 6624 ahc_name(ahc), ahc_lookup_phase_entry(last_phase)->phasemsg, 6625 ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8)); 6626 if (paused) 6627 printf("Card was paused\n"); 6628 printf("ACCUM = 0x%x, SINDEX = 0x%x, DINDEX = 0x%x, ARG_2 = 0x%x\n", 6629 ahc_inb(ahc, ACCUM), ahc_inb(ahc, SINDEX), ahc_inb(ahc, DINDEX), 6630 ahc_inb(ahc, ARG_2)); 6631 printf("HCNT = 0x%x SCBPTR = 0x%x\n", ahc_inb(ahc, HCNT), 6632 ahc_inb(ahc, SCBPTR)); 6633 cur_col = 0; 6634 if ((ahc->features & AHC_DT) != 0) 6635 ahc_scsiphase_print(ahc_inb(ahc, SCSIPHASE), &cur_col, 50); 6636 ahc_scsisigi_print(ahc_inb(ahc, SCSISIGI), &cur_col, 50); 6637 ahc_error_print(ahc_inb(ahc, ERROR), &cur_col, 50); 6638 ahc_scsibusl_print(ahc_inb(ahc, SCSIBUSL), &cur_col, 50); 6639 ahc_lastphase_print(ahc_inb(ahc, LASTPHASE), &cur_col, 50); 6640 ahc_scsiseq_print(ahc_inb(ahc, SCSISEQ), &cur_col, 50); 6641 ahc_sblkctl_print(ahc_inb(ahc, SBLKCTL), &cur_col, 50); 6642 ahc_scsirate_print(ahc_inb(ahc, SCSIRATE), &cur_col, 50); 6643 ahc_seqctl_print(ahc_inb(ahc, SEQCTL), &cur_col, 50); 6644 ahc_seq_flags_print(ahc_inb(ahc, SEQ_FLAGS), &cur_col, 50); 6645 ahc_sstat0_print(ahc_inb(ahc, SSTAT0), &cur_col, 50); 6646 ahc_sstat1_print(ahc_inb(ahc, SSTAT1), &cur_col, 50); 6647 ahc_sstat2_print(ahc_inb(ahc, SSTAT2), &cur_col, 50); 6648 ahc_sstat3_print(ahc_inb(ahc, SSTAT3), &cur_col, 50); 6649 ahc_simode0_print(ahc_inb(ahc, SIMODE0), &cur_col, 50); 6650 ahc_simode1_print(ahc_inb(ahc, SIMODE1), &cur_col, 50); 6651 ahc_sxfrctl0_print(ahc_inb(ahc, SXFRCTL0), &cur_col, 50); 6652 ahc_dfcntrl_print(ahc_inb(ahc, DFCNTRL), &cur_col, 50); 6653 ahc_dfstatus_print(ahc_inb(ahc, DFSTATUS), &cur_col, 50); 6654 if (cur_col != 0) 6655 printf("\n"); 6656 printf("STACK:"); 6657 for (i = 0; i < STACK_SIZE; i++) 6658 printf(" 0x%x", ahc_inb(ahc, STACK)|(ahc_inb(ahc, STACK) << 8)); 6659 printf("\nSCB count = %d\n", ahc->scb_data->numscbs); 6660 printf("Kernel NEXTQSCB = %d\n", ahc->next_queued_scb->hscb->tag); 6661 printf("Card NEXTQSCB = %d\n", ahc_inb(ahc, NEXT_QUEUED_SCB)); 6662 /* QINFIFO */ 6663 printf("QINFIFO entries: "); 6664 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 6665 qinpos = ahc_inb(ahc, SNSCB_QOFF); 6666 ahc_outb(ahc, SNSCB_QOFF, qinpos); 6667 } else 6668 qinpos = ahc_inb(ahc, QINPOS); 6669 qintail = ahc->qinfifonext; 6670 while (qinpos != qintail) { 6671 printf("%d ", ahc->qinfifo[qinpos]); 6672 qinpos++; 6673 } 6674 printf("\n"); 6675 6676 printf("Waiting Queue entries: "); 6677 scb_index = ahc_inb(ahc, WAITING_SCBH); 6678 i = 0; 6679 while (scb_index != SCB_LIST_NULL && i++ < 256) { 6680 ahc_outb(ahc, SCBPTR, scb_index); 6681 printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG)); 6682 scb_index = ahc_inb(ahc, SCB_NEXT); 6683 } 6684 printf("\n"); 6685 6686 printf("Disconnected Queue entries: "); 6687 scb_index = ahc_inb(ahc, DISCONNECTED_SCBH); 6688 i = 0; 6689 while (scb_index != SCB_LIST_NULL && i++ < 256) { 6690 ahc_outb(ahc, SCBPTR, scb_index); 6691 printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG)); 6692 scb_index = ahc_inb(ahc, SCB_NEXT); 6693 } 6694 printf("\n"); 6695 6696 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD); 6697 printf("QOUTFIFO entries: "); 6698 qoutpos = ahc->qoutfifonext; 6699 i = 0; 6700 while (ahc->qoutfifo[qoutpos] != SCB_LIST_NULL && i++ < 256) { 6701 printf("%d ", ahc->qoutfifo[qoutpos]); 6702 qoutpos++; 6703 } 6704 printf("\n"); 6705 6706 printf("Sequencer Free SCB List: "); 6707 scb_index = ahc_inb(ahc, FREE_SCBH); 6708 i = 0; 6709 while (scb_index != SCB_LIST_NULL && i++ < 256) { 6710 ahc_outb(ahc, SCBPTR, scb_index); 6711 printf("%d ", scb_index); 6712 scb_index = ahc_inb(ahc, SCB_NEXT); 6713 } 6714 printf("\n"); 6715 6716 printf("Sequencer SCB Info: "); 6717 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 6718 ahc_outb(ahc, SCBPTR, i); 6719 /*cur_col =*/ printf("\n%3d ", i); 6720 6721 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), &cur_col, 60); 6722 ahc_scb_scsiid_print(ahc_inb(ahc, SCB_SCSIID), &cur_col, 60); 6723 ahc_scb_lun_print(ahc_inb(ahc, SCB_LUN), &cur_col, 60); 6724 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60); 6725 } 6726 printf("\n"); 6727 6728 printf("Pending list: "); 6729 i = 0; 6730 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { 6731 if (i++ > 256) 6732 break; 6733 /*cur_col =*/ printf("\n%3d ", scb->hscb->tag); 6734 ahc_scb_control_print(scb->hscb->control, &cur_col, 60); 6735 ahc_scb_scsiid_print(scb->hscb->scsiid, &cur_col, 60); 6736 ahc_scb_lun_print(scb->hscb->lun, &cur_col, 60); 6737 if ((ahc->flags & AHC_PAGESCBS) == 0) { 6738 ahc_outb(ahc, SCBPTR, scb->hscb->tag); 6739 printf("("); 6740 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), 6741 &cur_col, 60); 6742 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60); 6743 printf(")"); 6744 } 6745 } 6746 printf("\n"); 6747 6748 printf("Kernel Free SCB list: "); 6749 i = 0; 6750 SLIST_FOREACH(scb, &ahc->scb_data->free_scbs, links.sle) { 6751 if (i++ > 256) 6752 break; 6753 printf("%d ", scb->hscb->tag); 6754 } 6755 printf("\n"); 6756 6757 maxtarget = (ahc->features & (AHC_WIDE|AHC_TWIN)) ? 15 : 7; 6758 for (target = 0; target <= maxtarget; target++) { 6759 untagged_q = &ahc->untagged_queues[target]; 6760 if (TAILQ_FIRST(untagged_q) == NULL) 6761 continue; 6762 printf("Untagged Q(%d): ", target); 6763 i = 0; 6764 TAILQ_FOREACH(scb, untagged_q, links.tqe) { 6765 if (i++ > 256) 6766 break; 6767 printf("%d ", scb->hscb->tag); 6768 } 6769 printf("\n"); 6770 } 6771 6772 ahc_platform_dump_card_state(ahc); 6773 printf("\n<<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>\n"); 6774 ahc_outb(ahc, SCBPTR, saved_scbptr); 6775 if (paused == 0) 6776 ahc_unpause(ahc); 6777 } 6778 6779 /************************* Target Mode ****************************************/ 6780 #ifdef AHC_TARGET_MODE 6781 cam_status 6782 ahc_find_tmode_devs(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb, 6783 struct ahc_tmode_tstate **tstate, 6784 struct ahc_tmode_lstate **lstate, 6785 int notfound_failure) 6786 { 6787 6788 if ((ahc->features & AHC_TARGETMODE) == 0) 6789 return (CAM_REQ_INVALID); 6790 6791 /* 6792 * Handle the 'black hole' device that sucks up 6793 * requests to unattached luns on enabled targets. 6794 */ 6795 if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD 6796 && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) { 6797 *tstate = NULL; 6798 *lstate = ahc->black_hole; 6799 } else { 6800 u_int max_id; 6801 6802 max_id = (ahc->features & AHC_WIDE) ? 15 : 7; 6803 if (ccb->ccb_h.target_id > max_id) 6804 return (CAM_TID_INVALID); 6805 6806 if (ccb->ccb_h.target_lun >= AHC_NUM_LUNS) 6807 return (CAM_LUN_INVALID); 6808 6809 *tstate = ahc->enabled_targets[ccb->ccb_h.target_id]; 6810 *lstate = NULL; 6811 if (*tstate != NULL) 6812 *lstate = 6813 (*tstate)->enabled_luns[ccb->ccb_h.target_lun]; 6814 } 6815 6816 if (notfound_failure != 0 && *lstate == NULL) 6817 return (CAM_PATH_INVALID); 6818 6819 return (CAM_REQ_CMP); 6820 } 6821 6822 void 6823 ahc_handle_en_lun(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb) 6824 { 6825 struct ahc_tmode_tstate *tstate; 6826 struct ahc_tmode_lstate *lstate; 6827 struct ccb_en_lun *cel; 6828 cam_status status; 6829 u_int target; 6830 u_int lun; 6831 u_int target_mask; 6832 u_int our_id; 6833 u_long s; 6834 char channel; 6835 6836 status = ahc_find_tmode_devs(ahc, sim, ccb, &tstate, &lstate, 6837 /*notfound_failure*/FALSE); 6838 6839 if (status != CAM_REQ_CMP) { 6840 ccb->ccb_h.status = status; 6841 return; 6842 } 6843 6844 if (cam_sim_bus(sim) == 0) 6845 our_id = ahc->our_id; 6846 else 6847 our_id = ahc->our_id_b; 6848 6849 if (ccb->ccb_h.target_id != our_id) { 6850 /* 6851 * our_id represents our initiator ID, or 6852 * the ID of the first target to have an 6853 * enabled lun in target mode. There are 6854 * two cases that may preclude enabling a 6855 * target id other than our_id. 6856 * 6857 * o our_id is for an active initiator role. 6858 * Since the hardware does not support 6859 * reselections to the initiator role at 6860 * anything other than our_id, and our_id 6861 * is used by the hardware to indicate the 6862 * ID to use for both select-out and 6863 * reselect-out operations, the only target 6864 * ID we can support in this mode is our_id. 6865 * 6866 * o The MULTARGID feature is not available and 6867 * a previous target mode ID has been enabled. 6868 */ 6869 if ((ahc->features & AHC_MULTIROLE) != 0) { 6870 6871 if ((ahc->features & AHC_MULTI_TID) != 0 6872 && (ahc->flags & AHC_INITIATORROLE) != 0) { 6873 /* 6874 * Only allow additional targets if 6875 * the initiator role is disabled. 6876 * The hardware cannot handle a re-select-in 6877 * on the initiator id during a re-select-out 6878 * on a different target id. 6879 */ 6880 status = CAM_TID_INVALID; 6881 } else if ((ahc->flags & AHC_INITIATORROLE) != 0 6882 || ahc->enabled_luns > 0) { 6883 /* 6884 * Only allow our target id to change 6885 * if the initiator role is not configured 6886 * and there are no enabled luns which 6887 * are attached to the currently registered 6888 * scsi id. 6889 */ 6890 status = CAM_TID_INVALID; 6891 } 6892 } else if ((ahc->features & AHC_MULTI_TID) == 0 6893 && ahc->enabled_luns > 0) { 6894 6895 status = CAM_TID_INVALID; 6896 } 6897 } 6898 6899 if (status != CAM_REQ_CMP) { 6900 ccb->ccb_h.status = status; 6901 return; 6902 } 6903 6904 /* 6905 * We now have an id that is valid. 6906 * If we aren't in target mode, switch modes. 6907 */ 6908 if ((ahc->flags & AHC_TARGETROLE) == 0 6909 && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) { 6910 u_long s; 6911 6912 printf("Configuring Target Mode\n"); 6913 ahc_lock(ahc, &s); 6914 if (LIST_FIRST(&ahc->pending_scbs) != NULL) { 6915 ccb->ccb_h.status = CAM_BUSY; 6916 ahc_unlock(ahc, &s); 6917 return; 6918 } 6919 ahc->flags |= AHC_TARGETROLE; 6920 if ((ahc->features & AHC_MULTIROLE) == 0) 6921 ahc->flags &= ~AHC_INITIATORROLE; 6922 ahc_pause(ahc); 6923 ahc_loadseq(ahc); 6924 ahc_unlock(ahc, &s); 6925 } 6926 cel = &ccb->cel; 6927 target = ccb->ccb_h.target_id; 6928 lun = ccb->ccb_h.target_lun; 6929 channel = SIM_CHANNEL(ahc, sim); 6930 target_mask = 0x01 << target; 6931 if (channel == 'B') 6932 target_mask <<= 8; 6933 6934 if (cel->enable != 0) { 6935 u_int scsiseq; 6936 6937 /* Are we already enabled?? */ 6938 if (lstate != NULL) { 6939 xpt_print_path(ccb->ccb_h.path); 6940 printf("Lun already enabled\n"); 6941 ccb->ccb_h.status = CAM_LUN_ALRDY_ENA; 6942 return; 6943 } 6944 6945 if (cel->grp6_len != 0 6946 || cel->grp7_len != 0) { 6947 /* 6948 * Don't (yet?) support vendor 6949 * specific commands. 6950 */ 6951 ccb->ccb_h.status = CAM_REQ_INVALID; 6952 printf("Non-zero Group Codes\n"); 6953 return; 6954 } 6955 6956 /* 6957 * Seems to be okay. 6958 * Setup our data structures. 6959 */ 6960 if (target != CAM_TARGET_WILDCARD && tstate == NULL) { 6961 tstate = ahc_alloc_tstate(ahc, target, channel); 6962 if (tstate == NULL) { 6963 xpt_print_path(ccb->ccb_h.path); 6964 printf("Couldn't allocate tstate\n"); 6965 ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 6966 return; 6967 } 6968 } 6969 lstate = malloc(sizeof(*lstate), M_DEVBUF, M_NOWAIT); 6970 if (lstate == NULL) { 6971 xpt_print_path(ccb->ccb_h.path); 6972 printf("Couldn't allocate lstate\n"); 6973 ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 6974 return; 6975 } 6976 memset(lstate, 0, sizeof(*lstate)); 6977 status = xpt_create_path(&lstate->path, /*periph*/NULL, 6978 xpt_path_path_id(ccb->ccb_h.path), 6979 xpt_path_target_id(ccb->ccb_h.path), 6980 xpt_path_lun_id(ccb->ccb_h.path)); 6981 if (status != CAM_REQ_CMP) { 6982 free(lstate, M_DEVBUF); 6983 xpt_print_path(ccb->ccb_h.path); 6984 printf("Couldn't allocate path\n"); 6985 ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 6986 return; 6987 } 6988 SLIST_INIT(&lstate->accept_tios); 6989 SLIST_INIT(&lstate->immed_notifies); 6990 ahc_lock(ahc, &s); 6991 ahc_pause(ahc); 6992 if (target != CAM_TARGET_WILDCARD) { 6993 tstate->enabled_luns[lun] = lstate; 6994 ahc->enabled_luns++; 6995 6996 if ((ahc->features & AHC_MULTI_TID) != 0) { 6997 u_int targid_mask; 6998 6999 targid_mask = ahc_inb(ahc, TARGID) 7000 | (ahc_inb(ahc, TARGID + 1) << 8); 7001 7002 targid_mask |= target_mask; 7003 ahc_outb(ahc, TARGID, targid_mask); 7004 ahc_outb(ahc, TARGID+1, (targid_mask >> 8)); 7005 7006 ahc_update_scsiid(ahc, targid_mask); 7007 } else { 7008 u_int our_id; 7009 char channel; 7010 7011 channel = SIM_CHANNEL(ahc, sim); 7012 our_id = SIM_SCSI_ID(ahc, sim); 7013 7014 /* 7015 * This can only happen if selections 7016 * are not enabled 7017 */ 7018 if (target != our_id) { 7019 u_int sblkctl; 7020 char cur_channel; 7021 int swap; 7022 7023 sblkctl = ahc_inb(ahc, SBLKCTL); 7024 cur_channel = (sblkctl & SELBUSB) 7025 ? 'B' : 'A'; 7026 if ((ahc->features & AHC_TWIN) == 0) 7027 cur_channel = 'A'; 7028 swap = cur_channel != channel; 7029 if (channel == 'A') 7030 ahc->our_id = target; 7031 else 7032 ahc->our_id_b = target; 7033 7034 if (swap) 7035 ahc_outb(ahc, SBLKCTL, 7036 sblkctl ^ SELBUSB); 7037 7038 ahc_outb(ahc, SCSIID, target); 7039 7040 if (swap) 7041 ahc_outb(ahc, SBLKCTL, sblkctl); 7042 } 7043 } 7044 } else 7045 ahc->black_hole = lstate; 7046 /* Allow select-in operations */ 7047 if (ahc->black_hole != NULL && ahc->enabled_luns > 0) { 7048 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); 7049 scsiseq |= ENSELI; 7050 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq); 7051 scsiseq = ahc_inb(ahc, SCSISEQ); 7052 scsiseq |= ENSELI; 7053 ahc_outb(ahc, SCSISEQ, scsiseq); 7054 } 7055 ahc_unpause(ahc); 7056 ahc_unlock(ahc, &s); 7057 ccb->ccb_h.status = CAM_REQ_CMP; 7058 xpt_print_path(ccb->ccb_h.path); 7059 printf("Lun now enabled for target mode\n"); 7060 } else { 7061 struct scb *scb; 7062 int i, empty; 7063 7064 if (lstate == NULL) { 7065 ccb->ccb_h.status = CAM_LUN_INVALID; 7066 return; 7067 } 7068 7069 ahc_lock(ahc, &s); 7070 7071 ccb->ccb_h.status = CAM_REQ_CMP; 7072 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { 7073 struct ccb_hdr *ccbh; 7074 7075 ccbh = &scb->io_ctx->ccb_h; 7076 if (ccbh->func_code == XPT_CONT_TARGET_IO 7077 && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){ 7078 printf("CTIO pending\n"); 7079 ccb->ccb_h.status = CAM_REQ_INVALID; 7080 ahc_unlock(ahc, &s); 7081 return; 7082 } 7083 } 7084 7085 if (SLIST_FIRST(&lstate->accept_tios) != NULL) { 7086 printf("ATIOs pending\n"); 7087 ccb->ccb_h.status = CAM_REQ_INVALID; 7088 } 7089 7090 if (SLIST_FIRST(&lstate->immed_notifies) != NULL) { 7091 printf("INOTs pending\n"); 7092 ccb->ccb_h.status = CAM_REQ_INVALID; 7093 } 7094 7095 if (ccb->ccb_h.status != CAM_REQ_CMP) { 7096 ahc_unlock(ahc, &s); 7097 return; 7098 } 7099 7100 xpt_print_path(ccb->ccb_h.path); 7101 printf("Target mode disabled\n"); 7102 xpt_free_path(lstate->path); 7103 free(lstate, M_DEVBUF); 7104 7105 ahc_pause(ahc); 7106 /* Can we clean up the target too? */ 7107 if (target != CAM_TARGET_WILDCARD) { 7108 tstate->enabled_luns[lun] = NULL; 7109 ahc->enabled_luns--; 7110 for (empty = 1, i = 0; i < 8; i++) 7111 if (tstate->enabled_luns[i] != NULL) { 7112 empty = 0; 7113 break; 7114 } 7115 7116 if (empty) { 7117 ahc_free_tstate(ahc, target, channel, 7118 /*force*/FALSE); 7119 if (ahc->features & AHC_MULTI_TID) { 7120 u_int targid_mask; 7121 7122 targid_mask = ahc_inb(ahc, TARGID) 7123 | (ahc_inb(ahc, TARGID + 1) 7124 << 8); 7125 7126 targid_mask &= ~target_mask; 7127 ahc_outb(ahc, TARGID, targid_mask); 7128 ahc_outb(ahc, TARGID+1, 7129 (targid_mask >> 8)); 7130 ahc_update_scsiid(ahc, targid_mask); 7131 } 7132 } 7133 } else { 7134 7135 ahc->black_hole = NULL; 7136 7137 /* 7138 * We can't allow selections without 7139 * our black hole device. 7140 */ 7141 empty = TRUE; 7142 } 7143 if (ahc->enabled_luns == 0) { 7144 /* Disallow select-in */ 7145 u_int scsiseq; 7146 7147 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); 7148 scsiseq &= ~ENSELI; 7149 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq); 7150 scsiseq = ahc_inb(ahc, SCSISEQ); 7151 scsiseq &= ~ENSELI; 7152 ahc_outb(ahc, SCSISEQ, scsiseq); 7153 7154 if ((ahc->features & AHC_MULTIROLE) == 0) { 7155 printf("Configuring Initiator Mode\n"); 7156 ahc->flags &= ~AHC_TARGETROLE; 7157 ahc->flags |= AHC_INITIATORROLE; 7158 ahc_pause(ahc); 7159 ahc_loadseq(ahc); 7160 } 7161 } 7162 ahc_unpause(ahc); 7163 ahc_unlock(ahc, &s); 7164 } 7165 } 7166 7167 static void 7168 ahc_update_scsiid(struct ahc_softc *ahc, u_int targid_mask) 7169 { 7170 u_int scsiid_mask; 7171 u_int scsiid; 7172 7173 if ((ahc->features & AHC_MULTI_TID) == 0) 7174 panic("ahc_update_scsiid called on non-multitid unit\n"); 7175 7176 /* 7177 * Since we will rely on the TARGID mask 7178 * for selection enables, ensure that OID 7179 * in SCSIID is not set to some other ID 7180 * that we don't want to allow selections on. 7181 */ 7182 if ((ahc->features & AHC_ULTRA2) != 0) 7183 scsiid = ahc_inb(ahc, SCSIID_ULTRA2); 7184 else 7185 scsiid = ahc_inb(ahc, SCSIID); 7186 scsiid_mask = 0x1 << (scsiid & OID); 7187 if ((targid_mask & scsiid_mask) == 0) { 7188 u_int our_id; 7189 7190 /* ffs counts from 1 */ 7191 our_id = ffs(targid_mask); 7192 if (our_id == 0) 7193 our_id = ahc->our_id; 7194 else 7195 our_id--; 7196 scsiid &= TID; 7197 scsiid |= our_id; 7198 } 7199 if ((ahc->features & AHC_ULTRA2) != 0) 7200 ahc_outb(ahc, SCSIID_ULTRA2, scsiid); 7201 else 7202 ahc_outb(ahc, SCSIID, scsiid); 7203 } 7204 7205 void 7206 ahc_run_tqinfifo(struct ahc_softc *ahc, int paused) 7207 { 7208 struct target_cmd *cmd; 7209 7210 /* 7211 * If the card supports auto-access pause, 7212 * we can access the card directly regardless 7213 * of whether it is paused or not. 7214 */ 7215 if ((ahc->features & AHC_AUTOPAUSE) != 0) 7216 paused = TRUE; 7217 7218 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_POSTREAD); 7219 while ((cmd = &ahc->targetcmds[ahc->tqinfifonext])->cmd_valid != 0) { 7220 7221 /* 7222 * Only advance through the queue if we 7223 * have the resources to process the command. 7224 */ 7225 if (ahc_handle_target_cmd(ahc, cmd) != 0) 7226 break; 7227 7228 cmd->cmd_valid = 0; 7229 ahc_dmamap_sync(ahc, ahc->parent_dmat/*shared_data_dmat*/, 7230 ahc->shared_data_dmamap, 7231 ahc_targetcmd_offset(ahc, ahc->tqinfifonext), 7232 sizeof(struct target_cmd), 7233 BUS_DMASYNC_PREREAD); 7234 ahc->tqinfifonext++; 7235 7236 /* 7237 * Lazily update our position in the target mode incoming 7238 * command queue as seen by the sequencer. 7239 */ 7240 if ((ahc->tqinfifonext & (HOST_TQINPOS - 1)) == 1) { 7241 if ((ahc->features & AHC_HS_MAILBOX) != 0) { 7242 u_int hs_mailbox; 7243 7244 hs_mailbox = ahc_inb(ahc, HS_MAILBOX); 7245 hs_mailbox &= ~HOST_TQINPOS; 7246 hs_mailbox |= ahc->tqinfifonext & HOST_TQINPOS; 7247 ahc_outb(ahc, HS_MAILBOX, hs_mailbox); 7248 } else { 7249 if (!paused) 7250 ahc_pause(ahc); 7251 ahc_outb(ahc, KERNEL_TQINPOS, 7252 ahc->tqinfifonext & HOST_TQINPOS); 7253 if (!paused) 7254 ahc_unpause(ahc); 7255 } 7256 } 7257 } 7258 } 7259 7260 static int 7261 ahc_handle_target_cmd(struct ahc_softc *ahc, struct target_cmd *cmd) 7262 { 7263 struct ahc_tmode_tstate *tstate; 7264 struct ahc_tmode_lstate *lstate; 7265 struct ccb_accept_tio *atio; 7266 uint8_t *byte; 7267 int initiator; 7268 int target; 7269 int lun; 7270 7271 initiator = SCSIID_TARGET(ahc, cmd->scsiid); 7272 target = SCSIID_OUR_ID(cmd->scsiid); 7273 lun = (cmd->identify & MSG_IDENTIFY_LUNMASK); 7274 7275 byte = cmd->bytes; 7276 tstate = ahc->enabled_targets[target]; 7277 lstate = NULL; 7278 if (tstate != NULL) 7279 lstate = tstate->enabled_luns[lun]; 7280 7281 /* 7282 * Commands for disabled luns go to the black hole driver. 7283 */ 7284 if (lstate == NULL) 7285 lstate = ahc->black_hole; 7286 7287 atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios); 7288 if (atio == NULL) { 7289 ahc->flags |= AHC_TQINFIFO_BLOCKED; 7290 /* 7291 * Wait for more ATIOs from the peripheral driver for this lun. 7292 */ 7293 if (bootverbose) 7294 printf("%s: ATIOs exhausted\n", ahc_name(ahc)); 7295 return (1); 7296 } else 7297 ahc->flags &= ~AHC_TQINFIFO_BLOCKED; 7298 #if 0 7299 printf("Incoming command from %d for %d:%d%s\n", 7300 initiator, target, lun, 7301 lstate == ahc->black_hole ? "(Black Holed)" : ""); 7302 #endif 7303 SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle); 7304 7305 if (lstate == ahc->black_hole) { 7306 /* Fill in the wildcards */ 7307 atio->ccb_h.target_id = target; 7308 atio->ccb_h.target_lun = lun; 7309 } 7310 7311 /* 7312 * Package it up and send it off to 7313 * whomever has this lun enabled. 7314 */ 7315 atio->sense_len = 0; 7316 atio->init_id = initiator; 7317 if (byte[0] != 0xFF) { 7318 /* Tag was included */ 7319 atio->tag_action = *byte++; 7320 atio->tag_id = *byte++; 7321 atio->ccb_h.flags = CAM_TAG_ACTION_VALID; 7322 } else { 7323 atio->ccb_h.flags = 0; 7324 } 7325 byte++; 7326 7327 /* Okay. Now determine the cdb size based on the command code */ 7328 switch (*byte >> CMD_GROUP_CODE_SHIFT) { 7329 case 0: 7330 atio->cdb_len = 6; 7331 break; 7332 case 1: 7333 case 2: 7334 atio->cdb_len = 10; 7335 break; 7336 case 4: 7337 atio->cdb_len = 16; 7338 break; 7339 case 5: 7340 atio->cdb_len = 12; 7341 break; 7342 case 3: 7343 default: 7344 /* Only copy the opcode. */ 7345 atio->cdb_len = 1; 7346 printf("Reserved or VU command code type encountered\n"); 7347 break; 7348 } 7349 7350 memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len); 7351 7352 atio->ccb_h.status |= CAM_CDB_RECVD; 7353 7354 if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) { 7355 /* 7356 * We weren't allowed to disconnect. 7357 * We're hanging on the bus until a 7358 * continue target I/O comes in response 7359 * to this accept tio. 7360 */ 7361 #if 0 7362 printf("Received Immediate Command %d:%d:%d - %p\n", 7363 initiator, target, lun, ahc->pending_device); 7364 #endif 7365 ahc->pending_device = lstate; 7366 ahc_freeze_ccb((union ccb *)atio); 7367 atio->ccb_h.flags |= CAM_DIS_DISCONNECT; 7368 } 7369 xpt_done((union ccb*)atio); 7370 return (0); 7371 } 7372 #endif 7373 7374 static int 7375 ahc_createdmamem(tag, size, flags, mapp, vaddr, baddr, seg, nseg, myname, what) 7376 bus_dma_tag_t tag; 7377 int size; 7378 int flags; 7379 bus_dmamap_t *mapp; 7380 caddr_t *vaddr; 7381 bus_addr_t *baddr; 7382 bus_dma_segment_t *seg; 7383 int *nseg; 7384 const char *myname, *what; 7385 { 7386 int error, level = 0; 7387 7388 if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0, 7389 seg, 1, nseg, BUS_DMA_WAITOK)) != 0) { 7390 printf("%s: failed to allocate DMA mem for %s, error = %d\n", 7391 myname, what, error); 7392 goto out; 7393 } 7394 level++; 7395 7396 if ((error = bus_dmamem_map(tag, seg, *nseg, size, vaddr, 7397 BUS_DMA_WAITOK|BUS_DMA_COHERENT)) != 0) { 7398 printf("%s: failed to map DMA mem for %s, error = %d\n", 7399 myname, what, error); 7400 goto out; 7401 } 7402 level++; 7403 7404 if ((error = bus_dmamap_create(tag, size, 1, size, 0, 7405 BUS_DMA_WAITOK | flags, mapp)) != 0) { 7406 printf("%s: failed to create DMA map for %s, error = %d\n", 7407 myname, what, error); 7408 goto out; 7409 } 7410 level++; 7411 7412 7413 if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL, 7414 BUS_DMA_WAITOK)) != 0) { 7415 printf("%s: failed to load DMA map for %s, error = %d\n", 7416 myname, what, error); 7417 goto out; 7418 } 7419 7420 *baddr = (*mapp)->dm_segs[0].ds_addr; 7421 7422 return 0; 7423 out: 7424 printf("ahc_createdmamem error (%d)\n", level); 7425 switch (level) { 7426 case 3: 7427 bus_dmamap_destroy(tag, *mapp); 7428 /* FALLTHROUGH */ 7429 case 2: 7430 bus_dmamem_unmap(tag, *vaddr, size); 7431 /* FALLTHROUGH */ 7432 case 1: 7433 bus_dmamem_free(tag, seg, *nseg); 7434 break; 7435 default: 7436 break; 7437 } 7438 7439 return -1; 7440 } 7441 7442 static void 7443 ahc_freedmamem(tag, size, map, vaddr, seg, nseg) 7444 bus_dma_tag_t tag; 7445 int size; 7446 bus_dmamap_t map; 7447 caddr_t vaddr; 7448 bus_dma_segment_t *seg; 7449 int nseg; 7450 { 7451 7452 bus_dmamap_unload(tag, map); 7453 bus_dmamap_destroy(tag, map); 7454 bus_dmamem_unmap(tag, vaddr, size); 7455 bus_dmamem_free(tag, seg, nseg); 7456 } 7457
Indexes created Thu Oct 02 01:09:59 GMT 2025