1 /* $OpenBSD: aic7xxx.c,v 1.98 2024/09/04 07:54:52 mglocker Exp $ */
2 /* $NetBSD: aic7xxx.c,v 1.108 2003/11/02 11:07:44 wiz Exp $ */
3
4 /*
5 * Core routines and tables shareable across OS platforms.
6 *
7 * Copyright (c) 1994-2002 Justin T. Gibbs.
8 * Copyright (c) 2000-2002 Adaptec Inc.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 *
43 * $Id: aic7xxx.c,v 1.98 2024/09/04 07:54:52 mglocker Exp $
44 */
45 /*
46 * Ported from FreeBSD by Pascal Renauld, Network Storage Solutions, Inc. - April 2003
47 */
48
49 #include <dev/ic/aic7xxx_openbsd.h>
50 #ifdef SMALL_KERNEL
51 #define IO_EXPAND
52 #endif
53 #include <dev/ic/aic7xxx_inline.h>
54 #include <dev/microcode/aic7xxx/aicasm_insformat.h>
55
56 /****************************** Softc Data ************************************/
57 struct ahc_softc_tailq ahc_tailq = TAILQ_HEAD_INITIALIZER(ahc_tailq);
58
59 /***************************** Lookup Tables **********************************/
60 char *ahc_chip_names[] =
61 {
62 "NONE",
63 "aic7770",
64 "aic7850",
65 "aic7855",
66 "aic7859",
67 "aic7860",
68 "aic7870",
69 "aic7880",
70 "aic7895",
71 "aic7895C",
72 "aic7890/91",
73 "aic7896/97",
74 "aic7892",
75 "aic7899"
76 };
77
78 /*
79 * Hardware error codes.
80 */
81 struct ahc_hard_error_entry {
82 uint8_t errno;
83 char *errmesg;
84 };
85
86 #if !defined(SMALL_KERNEL)
87 static struct ahc_hard_error_entry ahc_hard_errors[] = {
88 { ILLHADDR, "Illegal Host Access" },
89 { ILLSADDR, "Illegal Sequencer Address referenced" },
90 { ILLOPCODE, "Illegal Opcode in sequencer program" },
91 { SQPARERR, "Sequencer Parity Error" },
92 { DPARERR, "Data-path Parity Error" },
93 { MPARERR, "Scratch or SCB Memory Parity Error" },
94 { PCIERRSTAT, "PCI Error detected" },
95 { CIOPARERR, "CIOBUS Parity Error" },
96 };
97 static const u_int num_errors = NUM_ELEMENTS(ahc_hard_errors);
98 #endif /* !defined(SMALL_KERNEL) */
99
100 static struct ahc_phase_table_entry ahc_phase_table[] =
101 {
102 { P_DATAOUT, MSG_NOOP, "in Data-out phase" },
103 { P_DATAIN, MSG_INITIATOR_DET_ERR, "in Data-in phase" },
104 { P_DATAOUT_DT, MSG_NOOP, "in DT Data-out phase" },
105 { P_DATAIN_DT, MSG_INITIATOR_DET_ERR, "in DT Data-in phase" },
106 { P_COMMAND, MSG_NOOP, "in Command phase" },
107 { P_MESGOUT, MSG_NOOP, "in Message-out phase" },
108 { P_STATUS, MSG_INITIATOR_DET_ERR, "in Status phase" },
109 { P_MESGIN, MSG_PARITY_ERROR, "in Message-in phase" },
110 { P_BUSFREE, MSG_NOOP, "while idle" },
111 { 0, MSG_NOOP, "in unknown phase" }
112 };
113
114 /*
115 * In most cases we only wish to iterate over real phases, so
116 * exclude the last element from the count.
117 */
118 static const u_int num_phases = NUM_ELEMENTS(ahc_phase_table) - 1;
119
120 /*
121 * Valid SCSIRATE values. (p. 3-17)
122 * Provides a mapping of transfer periods in ns to the proper value to
123 * stick in the scsixfer reg.
124 */
125 static struct ahc_syncrate ahc_syncrates[] =
126 {
127 /* ultra2 fast/ultra period rate */
128 { 0x42, 0x000, 9, "80.0" },
129 { 0x03, 0x000, 10, "40.0" },
130 { 0x04, 0x000, 11, "33.0" },
131 { 0x05, 0x100, 12, "20.0" },
132 { 0x06, 0x110, 15, "16.0" },
133 { 0x07, 0x120, 18, "13.4" },
134 { 0x08, 0x000, 25, "10.0" },
135 { 0x19, 0x010, 31, "8.0" },
136 { 0x1a, 0x020, 37, "6.67" },
137 { 0x1b, 0x030, 43, "5.7" },
138 { 0x1c, 0x040, 50, "5.0" },
139 { 0x00, 0x050, 56, "4.4" },
140 { 0x00, 0x060, 62, "4.0" },
141 { 0x00, 0x070, 68, "3.6" },
142 { 0x00, 0x000, 0, NULL }
143 };
144
145 /* Our Sequencer Program */
146 #include <dev/microcode/aic7xxx/aic7xxx_seq.h>
147
148 /**************************** Function Declarations ***************************/
149 static void ahc_force_renegotiation(struct ahc_softc *ahc,
150 struct ahc_devinfo *devinfo);
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_assert_atn(struct ahc_softc *ahc);
168 static void ahc_setup_initiator_msgout(struct ahc_softc *ahc,
169 struct ahc_devinfo *devinfo,
170 struct scb *scb);
171 static void ahc_build_transfer_msg(struct ahc_softc *ahc,
172 struct ahc_devinfo *devinfo);
173 static void ahc_construct_sdtr(struct ahc_softc *ahc,
174 struct ahc_devinfo *devinfo,
175 u_int period, u_int offset);
176 static void ahc_construct_wdtr(struct ahc_softc *ahc,
177 struct ahc_devinfo *devinfo,
178 u_int bus_width);
179 static void ahc_construct_ppr(struct ahc_softc *ahc,
180 struct ahc_devinfo *devinfo,
181 u_int period, u_int offset,
182 u_int bus_width, u_int ppr_options);
183 static void ahc_clear_msg_state(struct ahc_softc *ahc);
184 static void ahc_handle_proto_violation(struct ahc_softc *ahc);
185 static void ahc_handle_message_phase(struct ahc_softc *ahc);
186 typedef enum {
187 AHCMSG_1B,
188 AHCMSG_2B,
189 AHCMSG_EXT
190 } ahc_msgtype;
191 static int ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type,
192 u_int msgval, int full);
193 static int ahc_parse_msg(struct ahc_softc *ahc,
194 struct ahc_devinfo *devinfo);
195 static int ahc_handle_msg_reject(struct ahc_softc *ahc,
196 struct ahc_devinfo *devinfo);
197 static void ahc_handle_ign_wide_residue(struct ahc_softc *ahc,
198 struct ahc_devinfo *devinfo);
199 static void ahc_reinitialize_dataptrs(struct ahc_softc *ahc);
200 static void ahc_handle_devreset(struct ahc_softc *ahc,
201 struct ahc_devinfo *devinfo,
202 cam_status status, char *message,
203 int verbose_level);
204 #ifdef AHC_TARGET_MODE
205 static void ahc_setup_target_msgin(struct ahc_softc *ahc,
206 struct ahc_devinfo *devinfo,
207 struct scb *scb);
208 #endif
209
210 //static bus_dmamap_callback_t ahc_dmamap_cb;
211 static void ahc_build_free_scb_list(struct ahc_softc *ahc);
212 static int ahc_init_scbdata(struct ahc_softc *ahc);
213 static void ahc_fini_scbdata(struct ahc_softc *ahc);
214 static void ahc_qinfifo_requeue(struct ahc_softc *ahc,
215 struct scb *prev_scb,
216 struct scb *scb);
217 static int ahc_qinfifo_count(struct ahc_softc *ahc);
218 static u_int ahc_rem_scb_from_disc_list(struct ahc_softc *ahc,
219 u_int prev, u_int scbptr);
220 static void ahc_add_curscb_to_free_list(struct ahc_softc *ahc);
221 static u_int ahc_rem_wscb(struct ahc_softc *ahc,
222 u_int scbpos, u_int prev);
223 static void ahc_reset_current_bus(struct ahc_softc *ahc);
224 #ifdef AHC_DUMP_SEQ
225 static void ahc_dumpseq(struct ahc_softc *ahc);
226 #endif
227 static int ahc_loadseq(struct ahc_softc *ahc);
228 static int ahc_check_patch(struct ahc_softc *ahc,
229 const struct patch **start_patch,
230 u_int start_instr, u_int *skip_addr);
231 static void ahc_download_instr(struct ahc_softc *ahc,
232 u_int instrptr, uint8_t *dconsts);
233 #ifdef AHC_TARGET_MODE
234 static void ahc_queue_lstate_event(struct ahc_softc *ahc,
235 struct ahc_tmode_lstate *lstate,
236 u_int initiator_id,
237 u_int event_type,
238 u_int event_arg);
239 static void ahc_update_scsiid(struct ahc_softc *ahc,
240 u_int targid_mask);
241 static int ahc_handle_target_cmd(struct ahc_softc *ahc,
242 struct target_cmd *cmd);
243 #endif
244
245 /************************** Added for porting to NetBSD ***********************/
246 static int ahc_createdmamem(bus_dma_tag_t tag,
247 int size,
248 int flags,
249 bus_dmamap_t *mapp,
250 caddr_t *vaddr,
251 bus_addr_t *baddr,
252 bus_dma_segment_t *seg,
253 int *nseg,
254 const char *myname, const char *what);
255 static void ahc_freedmamem(bus_dma_tag_t tag,
256 int size,
257 bus_dmamap_t map,
258 caddr_t vaddr,
259 bus_dma_segment_t *seg,
260 int nseg);
261
262 /************************* Sequencer Execution Control ************************/
263 /*
264 * Restart the sequencer program from address zero
265 */
266 void
ahc_restart(struct ahc_softc * ahc)267 ahc_restart(struct ahc_softc *ahc)
268 {
269
270 ahc_pause(ahc);
271
272 /* No more pending messages. */
273 ahc_clear_msg_state(ahc);
274
275 ahc_outb(ahc, SCSISIGO, 0); /* De-assert BSY */
276 ahc_outb(ahc, MSG_OUT, MSG_NOOP); /* No message to send */
277 ahc_outb(ahc, SXFRCTL1, ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET);
278 ahc_outb(ahc, LASTPHASE, P_BUSFREE);
279 ahc_outb(ahc, SAVED_SCSIID, 0xFF);
280 ahc_outb(ahc, SAVED_LUN, 0xFF);
281
282 /*
283 * Ensure that the sequencer's idea of TQINPOS
284 * matches our own. The sequencer increments TQINPOS
285 * only after it sees a DMA complete and a reset could
286 * occur before the increment leaving the kernel to believe
287 * the command arrived but the sequencer to not.
288 */
289 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext);
290
291 /* Always allow reselection */
292 ahc_outb(ahc, SCSISEQ,
293 ahc_inb(ahc, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP));
294 if ((ahc->features & AHC_CMD_CHAN) != 0) {
295 /* Ensure that no DMA operations are in progress */
296 ahc_outb(ahc, CCSCBCNT, 0);
297 ahc_outb(ahc, CCSGCTL, 0);
298 ahc_outb(ahc, CCSCBCTL, 0);
299 }
300 /*
301 * If we were in the process of DMA'ing SCB data into
302 * an SCB, replace that SCB on the free list. This prevents
303 * an SCB leak.
304 */
305 if ((ahc_inb(ahc, SEQ_FLAGS2) & SCB_DMA) != 0) {
306 ahc_add_curscb_to_free_list(ahc);
307 ahc_outb(ahc, SEQ_FLAGS2,
308 ahc_inb(ahc, SEQ_FLAGS2) & ~SCB_DMA);
309 }
310
311 /*
312 * Clear any pending sequencer interrupt. It is no
313 * longer relevant since we're resetting the Program
314 * Counter.
315 */
316 ahc_outb(ahc, CLRINT, CLRSEQINT);
317
318 ahc_outb(ahc, MWI_RESIDUAL, 0);
319 ahc_outb(ahc, SEQCTL, ahc->seqctl);
320 ahc_outb(ahc, SEQADDR0, 0);
321 ahc_outb(ahc, SEQADDR1, 0);
322
323 ahc_unpause(ahc);
324 }
325
326 /************************* Input/Output Queues ********************************/
327 void
ahc_run_qoutfifo(struct ahc_softc * ahc)328 ahc_run_qoutfifo(struct ahc_softc *ahc)
329 {
330 struct scb *scb;
331 u_int scb_index;
332
333 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD);
334 while (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) {
335
336 scb_index = ahc->qoutfifo[ahc->qoutfifonext];
337 if ((ahc->qoutfifonext & 0x03) == 0x03) {
338 u_int modnext;
339
340 /*
341 * Clear 32bits of QOUTFIFO at a time
342 * so that we don't clobber an incoming
343 * byte DMA to the array on architectures
344 * that only support 32bit load and store
345 * operations.
346 */
347 modnext = ahc->qoutfifonext & ~0x3;
348 *((uint32_t *)(&ahc->qoutfifo[modnext])) = 0xFFFFFFFFUL;
349 ahc_dmamap_sync(ahc, ahc->parent_dmat /*shared_data_dmat*/,
350 ahc->shared_data_dmamap,
351 /*offset*/modnext, /*len*/4,
352 BUS_DMASYNC_PREREAD);
353 }
354 ahc->qoutfifonext++;
355
356 scb = ahc_lookup_scb(ahc, scb_index);
357 if (scb == NULL) {
358 printf("%s: WARNING no command for scb %d "
359 "(cmdcmplt)\nQOUTPOS = %d\n",
360 ahc_name(ahc), scb_index,
361 (ahc->qoutfifonext - 1) & 0xFF);
362 continue;
363 }
364
365 /*
366 * Save off the residual
367 * if there is one.
368 */
369 ahc_update_residual(ahc, scb);
370 ahc_done(ahc, scb);
371 }
372 }
373
374 void
ahc_run_untagged_queues(struct ahc_softc * ahc)375 ahc_run_untagged_queues(struct ahc_softc *ahc)
376 {
377 int i;
378
379 for (i = 0; i < 16; i++)
380 ahc_run_untagged_queue(ahc, &ahc->untagged_queues[i]);
381 }
382
383 void
ahc_run_untagged_queue(struct ahc_softc * ahc,struct scb_tailq * queue)384 ahc_run_untagged_queue(struct ahc_softc *ahc, struct scb_tailq *queue)
385 {
386 struct scb *scb;
387
388 if (ahc->untagged_queue_lock != 0)
389 return;
390
391 if ((scb = TAILQ_FIRST(queue)) != NULL
392 && (scb->flags & SCB_ACTIVE) == 0) {
393 scb->flags |= SCB_ACTIVE;
394 ahc_queue_scb(ahc, scb);
395 }
396 }
397
398 /************************* Interrupt Handling *********************************/
399 void
ahc_handle_brkadrint(struct ahc_softc * ahc)400 ahc_handle_brkadrint(struct ahc_softc *ahc)
401 {
402 /*
403 * We upset the sequencer :-(
404 * Lookup the error message
405 */
406 #ifndef SMALL_KERNEL
407 int i;
408 int error;
409
410 error = ahc_inb(ahc, ERROR);
411 for (i = 0; error != 1 && i < num_errors; i++)
412 error >>= 1;
413 if (i >= num_errors)
414 panic("invalid error code");
415 printf("%s: brkadrint, %s at seqaddr = 0x%x\n",
416 ahc_name(ahc), ahc_hard_errors[i].errmesg,
417 ahc_inb(ahc, SEQADDR0) |
418 (ahc_inb(ahc, SEQADDR1) << 8));
419
420 ahc_dump_card_state(ahc);
421 #endif
422
423 /* Tell everyone that this HBA is no longer available */
424 ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
425 CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN,
426 CAM_NO_HBA);
427
428 /* Disable all interrupt sources by resetting the controller */
429 ahc_shutdown(ahc);
430 }
431
432 void
ahc_handle_seqint(struct ahc_softc * ahc,u_int intstat)433 ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat)
434 {
435 struct scb *scb;
436 struct ahc_devinfo devinfo;
437 u_int scb_index;
438
439 ahc_fetch_devinfo(ahc, &devinfo);
440
441 /*
442 * Clear the upper byte that holds SEQINT status
443 * codes and clear the SEQINT bit. We will unpause
444 * the sequencer, if appropriate, after servicing
445 * the request.
446 */
447 ahc_outb(ahc, CLRINT, CLRSEQINT);
448 switch (intstat & SEQINT_MASK) {
449 case BAD_STATUS:
450 {
451 struct hardware_scb *hscb;
452
453 /*
454 * Set the default return value to 0 (don't
455 * send sense). The sense code will change
456 * this if needed.
457 */
458 ahc_outb(ahc, RETURN_1, 0);
459
460 /*
461 * The sequencer will notify us when a command
462 * has an error that would be of interest to
463 * the kernel. This allows us to leave the sequencer
464 * running in the common case of command completes
465 * without error. The sequencer will already have
466 * DMA'd the SCB back up to us, so we can reference
467 * the in kernel copy directly.
468 */
469 scb_index = ahc_inb(ahc, SCB_TAG);
470 scb = ahc_lookup_scb(ahc, scb_index);
471 if (scb == NULL) {
472 ahc_print_devinfo(ahc, &devinfo);
473 printf("ahc_intr - referenced scb "
474 "not valid during seqint 0x%x scb(%d)\n",
475 intstat, scb_index);
476 ahc_dump_card_state(ahc);
477 panic("for safety");
478 goto unpause;
479 }
480
481 hscb = scb->hscb;
482
483 /* Don't want to clobber the original sense code */
484 if ((scb->flags & SCB_SENSE) != 0) {
485 /*
486 * Clear the SCB_SENSE Flag and have
487 * the sequencer do a normal command
488 * complete.
489 */
490 scb->flags &= ~SCB_SENSE;
491 ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
492 break;
493 }
494 ahc_set_transaction_status(scb, CAM_SCSI_STATUS_ERROR);
495 /* Freeze the queue until the client sees the error. */
496 ahc_freeze_devq(ahc, scb);
497 ahc_freeze_scb(scb);
498 ahc_set_scsi_status(scb, hscb->shared_data.status.scsi_status);
499 switch (hscb->shared_data.status.scsi_status) {
500 case SCSI_STATUS_OK:
501 printf("%s: Interrupted for status of 0 (?)\n",
502 ahc_name(ahc));
503 break;
504 case SCSI_STATUS_CMD_TERMINATED:
505 case SCSI_STATUS_CHECK_COND:
506 {
507 struct ahc_dma_seg *sg;
508 struct scsi_sense *sc;
509 struct ahc_initiator_tinfo *targ_info;
510 struct ahc_tmode_tstate *tstate;
511 struct ahc_transinfo *tinfo;
512 #ifdef AHC_DEBUG
513 if (ahc_debug & AHC_SHOW_SENSE) {
514 ahc_print_path(ahc, scb);
515 printf("SCB %d: requests Check Status\n",
516 scb->hscb->tag);
517 }
518 #endif
519
520 if (ahc_perform_autosense(scb) == 0)
521 break;
522
523 targ_info = ahc_fetch_transinfo(ahc,
524 devinfo.channel,
525 devinfo.our_scsiid,
526 devinfo.target,
527 &tstate);
528 tinfo = &targ_info->curr;
529 sg = scb->sg_list;
530 sc = (struct scsi_sense *)(&hscb->shared_data.cdb);
531 /*
532 * Save off the residual if there is one.
533 */
534 ahc_update_residual(ahc, scb);
535 #ifdef AHC_DEBUG
536 if (ahc_debug & AHC_SHOW_SENSE) {
537 ahc_print_path(ahc, scb);
538 printf("Sending Sense\n");
539 }
540 #endif
541 sg->addr = ahc_get_sense_bufaddr(ahc, scb);
542 sg->len = ahc_get_sense_bufsize(ahc, scb);
543 sg->len |= AHC_DMA_LAST_SEG;
544
545 /* Fixup byte order */
546 sg->addr = aic_htole32(sg->addr);
547 sg->len = aic_htole32(sg->len);
548
549 sc->opcode = REQUEST_SENSE;
550 sc->byte2 = 0;
551 if (tinfo->protocol_version <= SCSI_REV_2
552 && SCB_GET_LUN(scb) < 8)
553 sc->byte2 = SCB_GET_LUN(scb) << 5;
554 sc->unused[0] = 0;
555 sc->unused[1] = 0;
556 sc->length = sg->len;
557 sc->control = 0;
558
559 /*
560 * We can't allow the target to disconnect.
561 * This will be an untagged transaction and
562 * having the target disconnect will make this
563 * transaction indistinguishable from outstanding
564 * tagged transactions.
565 */
566 hscb->control = 0;
567
568 /*
569 * This request sense could be because the
570 * the device lost power or in some other
571 * way has lost our transfer negotiations.
572 * Renegotiate if appropriate. Unit attention
573 * errors will be reported before any data
574 * phases occur.
575 */
576 if (ahc_get_residual(scb)
577 == ahc_get_transfer_length(scb)) {
578 ahc_update_neg_request(ahc, &devinfo,
579 tstate, targ_info,
580 AHC_NEG_IF_NON_ASYNC);
581 }
582 if (tstate->auto_negotiate & devinfo.target_mask) {
583 hscb->control |= MK_MESSAGE;
584 scb->flags &= ~SCB_NEGOTIATE;
585 scb->flags |= SCB_AUTO_NEGOTIATE;
586 }
587 hscb->cdb_len = sizeof(*sc);
588 hscb->dataptr = sg->addr;
589 hscb->datacnt = sg->len;
590 hscb->sgptr = scb->sg_list_phys | SG_FULL_RESID;
591 hscb->sgptr = aic_htole32(hscb->sgptr);
592 #ifdef __OpenBSD__
593 bus_dmamap_sync(ahc->parent_dmat,
594 ahc->scb_data->sense_dmamap,
595 (scb - ahc->scb_data->scbarray) *
596 sizeof(struct scsi_sense_data),
597 sizeof(struct scsi_sense_data),
598 BUS_DMASYNC_PREREAD);
599 bus_dmamap_sync(ahc->parent_dmat,
600 scb->sg_map->sg_dmamap,
601 0, scb->sg_map->sg_dmamap->dm_mapsize,
602 BUS_DMASYNC_PREWRITE);
603 bus_dmamap_sync(ahc->parent_dmat,
604 ahc->scb_data->hscb_dmamap,
605 0, ahc->scb_data->hscb_dmamap->dm_mapsize,
606 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
607 #endif
608 scb->sg_count = 1;
609 scb->flags |= SCB_SENSE;
610 ahc_qinfifo_requeue_tail(ahc, scb);
611 ahc_outb(ahc, RETURN_1, SEND_SENSE);
612 /*
613 * Ensure we have enough time to actually
614 * retrieve the sense.
615 */
616 ahc_scb_timer_reset(scb, 5 * 1000000);
617 break;
618 }
619 default:
620 break;
621 }
622 break;
623 }
624 case NO_MATCH:
625 {
626 /* Ensure we don't leave the selection hardware on */
627 ahc_outb(ahc, SCSISEQ,
628 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
629
630 printf("%s:%c:%d: no active SCB for reconnecting "
631 "target - issuing BUS DEVICE RESET\n",
632 ahc_name(ahc), devinfo.channel, devinfo.target);
633 printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
634 "ARG_1 == 0x%x ACCUM = 0x%x\n",
635 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN),
636 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
637 printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
638 "SINDEX == 0x%x\n",
639 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR),
640 ahc_index_busy_tcl(ahc,
641 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID),
642 ahc_inb(ahc, SAVED_LUN))),
643 ahc_inb(ahc, SINDEX));
644 printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
645 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n",
646 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID),
647 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG),
648 ahc_inb(ahc, SCB_CONTROL));
649 printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n",
650 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI));
651 printf("SXFRCTL0 == 0x%x\n", ahc_inb(ahc, SXFRCTL0));
652 printf("SEQCTL == 0x%x\n", ahc_inb(ahc, SEQCTL));
653 ahc_dump_card_state(ahc);
654 ahc->msgout_buf[0] = MSG_BUS_DEV_RESET;
655 ahc->msgout_len = 1;
656 ahc->msgout_index = 0;
657 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
658 ahc_outb(ahc, MSG_OUT, HOST_MSG);
659 ahc_assert_atn(ahc);
660 break;
661 }
662 case SEND_REJECT:
663 {
664 u_int rejbyte = ahc_inb(ahc, ACCUM);
665 printf("%s:%c:%d: Warning - unknown message received from "
666 "target (0x%x). Rejecting\n",
667 ahc_name(ahc), devinfo.channel, devinfo.target, rejbyte);
668 break;
669 }
670 case PROTO_VIOLATION:
671 {
672 ahc_handle_proto_violation(ahc);
673 break;
674 }
675 case IGN_WIDE_RES:
676 ahc_handle_ign_wide_residue(ahc, &devinfo);
677 break;
678 case PDATA_REINIT:
679 ahc_reinitialize_dataptrs(ahc);
680 break;
681 case BAD_PHASE:
682 {
683 u_int lastphase;
684
685 lastphase = ahc_inb(ahc, LASTPHASE);
686 printf("%s:%c:%d: unknown scsi bus phase %x, "
687 "lastphase = 0x%x. Attempting to continue\n",
688 ahc_name(ahc), devinfo.channel, devinfo.target,
689 lastphase, ahc_inb(ahc, SCSISIGI));
690 break;
691 }
692 case MISSED_BUSFREE:
693 {
694 u_int lastphase;
695
696 lastphase = ahc_inb(ahc, LASTPHASE);
697 printf("%s:%c:%d: Missed busfree. "
698 "Lastphase = 0x%x, Curphase = 0x%x\n",
699 ahc_name(ahc), devinfo.channel, devinfo.target,
700 lastphase, ahc_inb(ahc, SCSISIGI));
701 ahc_restart(ahc);
702 return;
703 }
704 case HOST_MSG_LOOP:
705 {
706 /*
707 * The sequencer has encountered a message phase
708 * that requires host assistance for completion.
709 * While handling the message phase(s), we will be
710 * notified by the sequencer after each byte is
711 * transferred so we can track bus phase changes.
712 *
713 * If this is the first time we've seen a HOST_MSG_LOOP
714 * interrupt, initialize the state of the host message
715 * loop.
716 */
717 if (ahc->msg_type == MSG_TYPE_NONE) {
718 u_int bus_phase;
719
720 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
721 if (bus_phase != P_MESGIN
722 && bus_phase != P_MESGOUT) {
723 printf("ahc_intr: HOST_MSG_LOOP bad "
724 "phase 0x%x\n",
725 bus_phase);
726 /*
727 * Probably transitioned to bus free before
728 * we got here. Just punt the message.
729 */
730 ahc_clear_intstat(ahc);
731 ahc_restart(ahc);
732 return;
733 }
734
735 scb_index = ahc_inb(ahc, SCB_TAG);
736 scb = ahc_lookup_scb(ahc, scb_index);
737 if (devinfo.role == ROLE_INITIATOR) {
738 if (scb == NULL)
739 panic("HOST_MSG_LOOP with "
740 "invalid SCB %x\n", scb_index);
741
742 if (bus_phase == P_MESGOUT)
743 ahc_setup_initiator_msgout(ahc,
744 &devinfo,
745 scb);
746 else {
747 ahc->msg_type =
748 MSG_TYPE_INITIATOR_MSGIN;
749 ahc->msgin_index = 0;
750 }
751 }
752 #ifdef AHC_TARGET_MODE
753 else {
754 if (bus_phase == P_MESGOUT) {
755 ahc->msg_type =
756 MSG_TYPE_TARGET_MSGOUT;
757 ahc->msgin_index = 0;
758 }
759 else
760 ahc_setup_target_msgin(ahc,
761 &devinfo,
762 scb);
763 }
764 #endif
765 }
766
767 ahc_handle_message_phase(ahc);
768 break;
769 }
770 case PERR_DETECTED:
771 {
772 /*
773 * If we've cleared the parity error interrupt
774 * but the sequencer still believes that SCSIPERR
775 * is true, it must be that the parity error is
776 * for the currently presented byte on the bus,
777 * and we are not in a phase (data-in) where we will
778 * eventually ack this byte. Ack the byte and
779 * throw it away in the hope that the target will
780 * take us to message out to deliver the appropriate
781 * error message.
782 */
783 if ((intstat & SCSIINT) == 0
784 && (ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0) {
785
786 if ((ahc->features & AHC_DT) == 0) {
787 u_int curphase;
788
789 /*
790 * The hardware will only let you ack bytes
791 * if the expected phase in SCSISIGO matches
792 * the current phase. Make sure this is
793 * currently the case.
794 */
795 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
796 ahc_outb(ahc, LASTPHASE, curphase);
797 ahc_outb(ahc, SCSISIGO, curphase);
798 }
799 if ((ahc_inb(ahc, SCSISIGI) & (CDI|MSGI)) == 0) {
800 int wait;
801
802 /*
803 * In a data phase. Faster to bitbucket
804 * the data than to individually ack each
805 * byte. This is also the only strategy
806 * that will work with AUTOACK enabled.
807 */
808 ahc_outb(ahc, SXFRCTL1,
809 ahc_inb(ahc, SXFRCTL1) | BITBUCKET);
810 wait = 5000;
811 while (--wait != 0) {
812 if ((ahc_inb(ahc, SCSISIGI)
813 & (CDI|MSGI)) != 0)
814 break;
815 aic_delay(100);
816 }
817 ahc_outb(ahc, SXFRCTL1,
818 ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET);
819 if (wait == 0) {
820 ahc_print_devinfo(ahc, &devinfo);
821 printf("Unable to clear parity error. "
822 "Resetting bus.\n");
823 scb_index = ahc_inb(ahc, SCB_TAG);
824 scb = ahc_lookup_scb(ahc, scb_index);
825 if (scb != NULL)
826 ahc_set_transaction_status(scb,
827 CAM_UNCOR_PARITY);
828 ahc_reset_channel(ahc, devinfo.channel,
829 /*init reset*/TRUE);
830 }
831 } else {
832 ahc_inb(ahc, SCSIDATL);
833 }
834 }
835 break;
836 }
837 case DATA_OVERRUN:
838 {
839 /*
840 * When the sequencer detects an overrun, it
841 * places the controller in "BITBUCKET" mode
842 * and allows the target to complete its transfer.
843 * Unfortunately, none of the counters get updated
844 * when the controller is in this mode, so we have
845 * no way of knowing how large the overrun was.
846 */
847 u_int scbindex = ahc_inb(ahc, SCB_TAG);
848 u_int lastphase = ahc_inb(ahc, LASTPHASE);
849 u_int i;
850
851 scb = ahc_lookup_scb(ahc, scbindex);
852 for (i = 0; i < num_phases; i++) {
853 if (lastphase == ahc_phase_table[i].phase)
854 break;
855 }
856 #ifdef AHC_DEBUG
857 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
858 ahc_print_path(ahc, scb);
859 printf("data overrun detected %s."
860 " Tag == 0x%x.\n",
861 ahc_phase_table[i].phasemsg,
862 scb->hscb->tag);
863 ahc_print_path(ahc, scb);
864 printf("%s seen Data Phase. Length = %ld. NumSGs = %d.\n",
865 ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't",
866 ahc_get_transfer_length(scb), scb->sg_count);
867 if (scb->sg_count > 0) {
868 for (i = 0; i < scb->sg_count; i++) {
869
870 printf("sg[%d] - Addr 0x%x%x : Length %d\n",
871 i,
872 (aic_le32toh(scb->sg_list[i].len) >> 24
873 & SG_HIGH_ADDR_BITS),
874 aic_le32toh(scb->sg_list[i].addr),
875 aic_le32toh(scb->sg_list[i].len)
876 & AHC_SG_LEN_MASK);
877 }
878 }
879 }
880 #endif
881 /*
882 * Set this and it will take effect when the
883 * target does a command complete.
884 */
885 ahc_freeze_devq(ahc, scb);
886 if ((scb->flags & SCB_SENSE) == 0) {
887 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
888 } else {
889 scb->flags &= ~SCB_SENSE;
890 ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
891 }
892 ahc_freeze_scb(scb);
893
894 if ((ahc->features & AHC_ULTRA2) != 0) {
895 /*
896 * Clear the channel in case we return
897 * to data phase later.
898 */
899 ahc_outb(ahc, SXFRCTL0,
900 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN);
901 ahc_outb(ahc, SXFRCTL0,
902 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN);
903 }
904 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
905 u_int dscommand1;
906
907 /* Ensure HHADDR is 0 for future DMA operations. */
908 dscommand1 = ahc_inb(ahc, DSCOMMAND1);
909 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0);
910 ahc_outb(ahc, HADDR, 0);
911 ahc_outb(ahc, DSCOMMAND1, dscommand1);
912 }
913 break;
914 }
915 case MKMSG_FAILED:
916 {
917 u_int scbindex;
918
919 printf("%s:%c:%d:%d: Attempt to issue message failed\n",
920 ahc_name(ahc), devinfo.channel, devinfo.target,
921 devinfo.lun);
922 scbindex = ahc_inb(ahc, SCB_TAG);
923 scb = ahc_lookup_scb(ahc, scbindex);
924 if (scb != NULL)
925 /*
926 * Ensure that we didn't put a second instance of this
927 * SCB into the QINFIFO.
928 */
929 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb),
930 SCB_GET_CHANNEL(ahc, scb),
931 SCB_GET_LUN(scb), scb->hscb->tag,
932 ROLE_INITIATOR, /*status*/0,
933 SEARCH_REMOVE);
934 break;
935 }
936 case NO_FREE_SCB:
937 {
938 printf("%s: No free or disconnected SCBs\n", ahc_name(ahc));
939 ahc_dump_card_state(ahc);
940 panic("for safety");
941 break;
942 }
943 case SCB_MISMATCH:
944 {
945 u_int scbptr;
946
947 scbptr = ahc_inb(ahc, SCBPTR);
948 printf("Bogus TAG after DMA. SCBPTR %d, tag %d, our tag %d\n",
949 scbptr, ahc_inb(ahc, ARG_1),
950 ahc->scb_data->hscbs[scbptr].tag);
951 ahc_dump_card_state(ahc);
952 panic("for safety");
953 break;
954 }
955 case OUT_OF_RANGE:
956 {
957 #ifndef SMALL_KERNEL
958 printf("%s: BTT calculation out of range\n", ahc_name(ahc));
959 printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
960 "ARG_1 == 0x%x ACCUM = 0x%x\n",
961 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN),
962 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
963 printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
964 "SINDEX == 0x%x\n, A == 0x%x\n",
965 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR),
966 ahc_index_busy_tcl(ahc,
967 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID),
968 ahc_inb(ahc, SAVED_LUN))),
969 ahc_inb(ahc, SINDEX),
970 ahc_inb(ahc, ACCUM));
971 printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
972 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n",
973 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID),
974 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG),
975 ahc_inb(ahc, SCB_CONTROL));
976 printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n",
977 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI));
978 #endif
979 ahc_dump_card_state(ahc);
980 panic("for safety");
981 break;
982 }
983 default:
984 printf("ahc_intr: seqint, "
985 "intstat == 0x%x, scsisigi = 0x%x\n",
986 intstat, ahc_inb(ahc, SCSISIGI));
987 break;
988 }
989 unpause:
990 /*
991 * The sequencer is paused immediately on
992 * a SEQINT, so we should restart it when
993 * we're done.
994 */
995 ahc_unpause(ahc);
996 }
997
998 void
ahc_handle_scsiint(struct ahc_softc * ahc,u_int intstat)999 ahc_handle_scsiint(struct ahc_softc *ahc, u_int intstat)
1000 {
1001 u_int scb_index;
1002 u_int status0;
1003 u_int status;
1004 struct scb *scb;
1005 char cur_channel;
1006 char intr_channel;
1007
1008 if ((ahc->features & AHC_TWIN) != 0
1009 && ((ahc_inb(ahc, SBLKCTL) & SELBUSB) != 0))
1010 cur_channel = 'B';
1011 else
1012 cur_channel = 'A';
1013 intr_channel = cur_channel;
1014
1015 if ((ahc->features & AHC_ULTRA2) != 0)
1016 status0 = ahc_inb(ahc, SSTAT0) & IOERR;
1017 else
1018 status0 = 0;
1019 status = ahc_inb(ahc, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
1020 if (status == 0 && status0 == 0) {
1021 if ((ahc->features & AHC_TWIN) != 0) {
1022 /* Try the other channel */
1023 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB);
1024 status = ahc_inb(ahc, SSTAT1)
1025 & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
1026 intr_channel = (cur_channel == 'A') ? 'B' : 'A';
1027 }
1028 if (status == 0) {
1029 printf("%s: Spurious SCSI interrupt\n", ahc_name(ahc));
1030 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1031 ahc_unpause(ahc);
1032 return;
1033 }
1034 }
1035
1036 /* Make sure the sequencer is in a safe location. */
1037 ahc_clear_critical_section(ahc);
1038
1039 scb_index = ahc_inb(ahc, SCB_TAG);
1040 scb = ahc_lookup_scb(ahc, scb_index);
1041 if (scb != NULL
1042 && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) != 0)
1043 scb = NULL;
1044
1045 if ((ahc->features & AHC_ULTRA2) != 0
1046 && (status0 & IOERR) != 0) {
1047 int now_lvd;
1048
1049 now_lvd = ahc_inb(ahc, SBLKCTL) & ENAB40;
1050 printf("%s: Transceiver State Has Changed to %s mode\n",
1051 ahc_name(ahc), now_lvd ? "LVD" : "SE");
1052 ahc_outb(ahc, CLRSINT0, CLRIOERR);
1053 /*
1054 * When transitioning to SE mode, the reset line
1055 * glitches, triggering an arbitration bug in some
1056 * Ultra2 controllers. This bug is cleared when we
1057 * assert the reset line. Since a reset glitch has
1058 * already occurred with this transition and a
1059 * transceiver state change is handled just like
1060 * a bus reset anyway, asserting the reset line
1061 * ourselves is safe.
1062 */
1063 ahc_reset_channel(ahc, intr_channel,
1064 /*Initiate Reset*/now_lvd == 0);
1065 } else if ((status & SCSIRSTI) != 0) {
1066 printf("%s: Someone reset channel %c\n",
1067 ahc_name(ahc), intr_channel);
1068 if (intr_channel != cur_channel)
1069 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB);
1070 ahc_reset_channel(ahc, intr_channel, /*Initiate Reset*/FALSE);
1071 } else if ((status & SCSIPERR) != 0) {
1072 /*
1073 * Determine the bus phase and queue an appropriate message.
1074 * SCSIPERR is latched true as soon as a parity error
1075 * occurs. If the sequencer acked the transfer that
1076 * caused the parity error and the currently presented
1077 * transfer on the bus has correct parity, SCSIPERR will
1078 * be cleared by CLRSCSIPERR. Use this to determine if
1079 * we should look at the last phase the sequencer recorded,
1080 * or the current phase presented on the bus.
1081 */
1082 struct ahc_devinfo devinfo;
1083 u_int mesg_out;
1084 u_int curphase;
1085 u_int errorphase;
1086 u_int lastphase;
1087 u_int scsirate;
1088 u_int i;
1089 u_int sstat2;
1090 int silent;
1091
1092 lastphase = ahc_inb(ahc, LASTPHASE);
1093 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
1094 sstat2 = ahc_inb(ahc, SSTAT2);
1095 ahc_outb(ahc, CLRSINT1, CLRSCSIPERR);
1096 /*
1097 * For all phases save DATA, the sequencer won't
1098 * automatically ack a byte that has a parity error
1099 * in it. So the only way that the current phase
1100 * could be 'data-in' is if the parity error is for
1101 * an already acked byte in the data phase. During
1102 * synchronous data-in transfers, we may actually
1103 * ack bytes before latching the current phase in
1104 * LASTPHASE, leading to the discrepancy between
1105 * curphase and lastphase.
1106 */
1107 if ((ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0
1108 || curphase == P_DATAIN || curphase == P_DATAIN_DT)
1109 errorphase = curphase;
1110 else
1111 errorphase = lastphase;
1112
1113 for (i = 0; i < num_phases; i++) {
1114 if (errorphase == ahc_phase_table[i].phase)
1115 break;
1116 }
1117 mesg_out = ahc_phase_table[i].mesg_out;
1118 silent = FALSE;
1119 if (scb != NULL) {
1120 if (SCB_IS_SILENT(scb))
1121 silent = TRUE;
1122 else
1123 ahc_print_path(ahc, scb);
1124 scb->flags |= SCB_TRANSMISSION_ERROR;
1125 } else
1126 printf("%s:%c:%d: ", ahc_name(ahc), intr_channel,
1127 SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID)));
1128 scsirate = ahc_inb(ahc, SCSIRATE);
1129 if (silent == FALSE) {
1130 printf("parity error detected %s. "
1131 "SEQADDR(0x%x) SCSIRATE(0x%x)\n",
1132 ahc_phase_table[i].phasemsg,
1133 ahc_inw(ahc, SEQADDR0),
1134 scsirate);
1135 if ((ahc->features & AHC_DT) != 0) {
1136 if ((sstat2 & CRCVALERR) != 0)
1137 printf("\tCRC Value Mismatch\n");
1138 if ((sstat2 & CRCENDERR) != 0)
1139 printf("\tNo terminal CRC packet "
1140 "received\n");
1141 if ((sstat2 & CRCREQERR) != 0)
1142 printf("\tIllegal CRC packet "
1143 "request\n");
1144 if ((sstat2 & DUAL_EDGE_ERR) != 0)
1145 printf("\tUnexpected %sDT Data Phase\n",
1146 (scsirate & SINGLE_EDGE)
1147 ? "" : "non-");
1148 }
1149 }
1150
1151 if ((ahc->features & AHC_DT) != 0
1152 && (sstat2 & DUAL_EDGE_ERR) != 0) {
1153 /*
1154 * This error applies regardless of
1155 * data direction, so ignore the value
1156 * in the phase table.
1157 */
1158 mesg_out = MSG_INITIATOR_DET_ERR;
1159 }
1160
1161 /*
1162 * We've set the hardware to assert ATN if we
1163 * get a parity error on "in" phases, so all we
1164 * need to do is stuff the message buffer with
1165 * the appropriate message. "In" phases have set
1166 * mesg_out to something other than MSG_NOP.
1167 */
1168 if (mesg_out != MSG_NOOP) {
1169 if (ahc->msg_type != MSG_TYPE_NONE)
1170 ahc->send_msg_perror = TRUE;
1171 else
1172 ahc_outb(ahc, MSG_OUT, mesg_out);
1173 }
1174 /*
1175 * Force a renegotiation with this target just in
1176 * case we are out of sync for some external reason
1177 * unknown (or unreported) by the target.
1178 */
1179 ahc_fetch_devinfo(ahc, &devinfo);
1180 ahc_force_renegotiation(ahc, &devinfo);
1181
1182 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1183 ahc_unpause(ahc);
1184 } else if ((status & SELTO) != 0) {
1185 u_int scbptr;
1186
1187 /* Stop the selection */
1188 ahc_outb(ahc, SCSISEQ, 0);
1189
1190 /* No more pending messages */
1191 ahc_clear_msg_state(ahc);
1192
1193 /* Clear interrupt state */
1194 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
1195 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR);
1196
1197 /*
1198 * Although the driver does not care about the
1199 * 'Selection in Progress' status bit, the busy
1200 * LED does. SELINGO is only cleared by a successful
1201 * selection, so we must manually clear it to insure
1202 * the LED turns off just in case no future successful
1203 * selections occur (e.g. no devices on the bus).
1204 */
1205 ahc_outb(ahc, CLRSINT0, CLRSELINGO);
1206
1207 scbptr = ahc_inb(ahc, WAITING_SCBH);
1208 ahc_outb(ahc, SCBPTR, scbptr);
1209 scb_index = ahc_inb(ahc, SCB_TAG);
1210
1211 scb = ahc_lookup_scb(ahc, scb_index);
1212 if (scb == NULL) {
1213 printf("%s: ahc_intr - referenced scb not "
1214 "valid during SELTO scb(%d, %d)\n",
1215 ahc_name(ahc), scbptr, scb_index);
1216 ahc_dump_card_state(ahc);
1217 } else {
1218 struct ahc_devinfo devinfo;
1219 #ifdef AHC_DEBUG
1220 if ((ahc_debug & AHC_SHOW_SELTO) != 0) {
1221 ahc_print_path(ahc, scb);
1222 printf("Saw Selection Timeout for SCB 0x%x\n",
1223 scb_index);
1224 }
1225 #endif
1226 ahc_scb_devinfo(ahc, &devinfo, scb);
1227 ahc_set_transaction_status(scb, CAM_SEL_TIMEOUT);
1228 ahc_freeze_devq(ahc, scb);
1229
1230 /*
1231 * Cancel any pending transactions on the device
1232 * now that it seems to be missing. This will
1233 * also revert us to async/narrow transfers until
1234 * we can renegotiate with the device.
1235 */
1236 ahc_handle_devreset(ahc, &devinfo,
1237 CAM_SEL_TIMEOUT,
1238 "Selection Timeout",
1239 /*verbose_level*/1);
1240 }
1241 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1242 ahc_restart(ahc);
1243 } else if ((status & BUSFREE) != 0
1244 && (ahc_inb(ahc, SIMODE1) & ENBUSFREE) != 0) {
1245 struct ahc_devinfo devinfo;
1246 u_int lastphase;
1247 u_int saved_scsiid;
1248 u_int saved_lun;
1249 u_int target;
1250 u_int initiator_role_id;
1251 char channel;
1252 int printerror;
1253
1254 /*
1255 * Clear our selection hardware as soon as possible.
1256 * We may have an entry in the waiting Q for this target,
1257 * that is affected by this busfree and we don't want to
1258 * go about selecting the target while we handle the event.
1259 */
1260 ahc_outb(ahc, SCSISEQ,
1261 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
1262
1263 /*
1264 * Disable busfree interrupts and clear the busfree
1265 * interrupt status. We do this here so that several
1266 * bus transactions occur prior to clearing the SCSIINT
1267 * latch. It can take a bit for the clearing to take effect.
1268 */
1269 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
1270 ahc_outb(ahc, CLRSINT1, CLRBUSFREE|CLRSCSIPERR);
1271
1272 /*
1273 * Look at what phase we were last in.
1274 * If its message out, chances are pretty good
1275 * that the busfree was in response to one of
1276 * our abort requests.
1277 */
1278 lastphase = ahc_inb(ahc, LASTPHASE);
1279 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
1280 saved_lun = ahc_inb(ahc, SAVED_LUN);
1281 target = SCSIID_TARGET(ahc, saved_scsiid);
1282 initiator_role_id = SCSIID_OUR_ID(saved_scsiid);
1283 channel = SCSIID_CHANNEL(ahc, saved_scsiid);
1284 ahc_compile_devinfo(&devinfo, initiator_role_id,
1285 target, saved_lun, channel, ROLE_INITIATOR);
1286 printerror = 1;
1287
1288 if (lastphase == P_MESGOUT) {
1289 u_int tag;
1290
1291 tag = SCB_LIST_NULL;
1292 if (ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT_TAG, TRUE)
1293 || ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT, TRUE)) {
1294 if (ahc->msgout_buf[ahc->msgout_index - 1]
1295 == MSG_ABORT_TAG)
1296 tag = scb->hscb->tag;
1297 ahc_print_path(ahc, scb);
1298 printf("SCB %d - Abort%s Completed.\n",
1299 scb->hscb->tag, tag == SCB_LIST_NULL ?
1300 "" : " Tag");
1301 ahc_abort_scbs(ahc, target, channel,
1302 saved_lun, tag,
1303 ROLE_INITIATOR,
1304 CAM_REQ_ABORTED);
1305 printerror = 0;
1306 } else if (ahc_sent_msg(ahc, AHCMSG_1B,
1307 MSG_BUS_DEV_RESET, TRUE)) {
1308 #ifdef __FreeBSD__
1309 /*
1310 * Don't mark the user's request for this BDR
1311 * as completing with CAM_BDR_SENT. CAM3
1312 * specifies CAM_REQ_CMP.
1313 */
1314 if (scb != NULL
1315 && scb->io_ctx->ccb_h.func_code== XPT_RESET_DEV
1316 && ahc_match_scb(ahc, scb, target, channel,
1317 CAM_LUN_WILDCARD,
1318 SCB_LIST_NULL,
1319 ROLE_INITIATOR)) {
1320 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1321 }
1322 #endif
1323 ahc_compile_devinfo(&devinfo,
1324 initiator_role_id,
1325 target,
1326 CAM_LUN_WILDCARD,
1327 channel,
1328 ROLE_INITIATOR);
1329 ahc_handle_devreset(ahc, &devinfo,
1330 CAM_BDR_SENT,
1331 "Bus Device Reset",
1332 /*verbose_level*/0);
1333 printerror = 0;
1334 } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1335 MSG_EXT_PPR, FALSE)) {
1336 struct ahc_initiator_tinfo *tinfo;
1337 struct ahc_tmode_tstate *tstate;
1338
1339 /*
1340 * PPR Rejected. Try non-ppr negotiation
1341 * and retry command.
1342 */
1343 tinfo = ahc_fetch_transinfo(ahc,
1344 devinfo.channel,
1345 devinfo.our_scsiid,
1346 devinfo.target,
1347 &tstate);
1348 tinfo->curr.transport_version = 2;
1349 tinfo->goal.transport_version = 2;
1350 tinfo->goal.ppr_options = 0;
1351 ahc_qinfifo_requeue_tail(ahc, scb);
1352 printerror = 0;
1353 } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1354 MSG_EXT_WDTR, FALSE)) {
1355 /*
1356 * Negotiation Rejected. Go-narrow and
1357 * retry command.
1358 */
1359 ahc_set_width(ahc, &devinfo,
1360 MSG_EXT_WDTR_BUS_8_BIT,
1361 AHC_TRANS_CUR|AHC_TRANS_GOAL,
1362 /*paused*/TRUE);
1363 ahc_qinfifo_requeue_tail(ahc, scb);
1364 printerror = 0;
1365 } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1366 MSG_EXT_SDTR, FALSE)) {
1367 /*
1368 * Negotiation Rejected. Go-async and
1369 * retry command.
1370 */
1371 ahc_set_syncrate(ahc, &devinfo,
1372 /*syncrate*/NULL,
1373 /*period*/0, /*offset*/0,
1374 /*ppr_options*/0,
1375 AHC_TRANS_CUR|AHC_TRANS_GOAL,
1376 /*paused*/TRUE);
1377 ahc_qinfifo_requeue_tail(ahc, scb);
1378 printerror = 0;
1379 }
1380 }
1381 if (printerror != 0) {
1382 u_int i;
1383
1384 if (scb != NULL) {
1385 u_int tag;
1386
1387 if ((scb->hscb->control & TAG_ENB) != 0)
1388 tag = scb->hscb->tag;
1389 else
1390 tag = SCB_LIST_NULL;
1391 ahc_print_path(ahc, scb);
1392 ahc_abort_scbs(ahc, target, channel,
1393 SCB_GET_LUN(scb), tag,
1394 ROLE_INITIATOR,
1395 CAM_UNEXP_BUSFREE);
1396 } else {
1397 /*
1398 * We had not fully identified this connection,
1399 * so we cannot abort anything.
1400 */
1401 printf("%s: ", ahc_name(ahc));
1402 }
1403 for (i = 0; i < num_phases; i++) {
1404 if (lastphase == ahc_phase_table[i].phase)
1405 break;
1406 }
1407 if (lastphase != P_BUSFREE) {
1408 /*
1409 * Renegotiate with this device at the
1410 * next opportunity just in case this busfree
1411 * is due to a negotiation mismatch with the
1412 * device.
1413 */
1414 ahc_force_renegotiation(ahc, &devinfo);
1415 }
1416 printf("Unexpected busfree %s\n"
1417 "SEQADDR == 0x%x\n",
1418 ahc_phase_table[i].phasemsg,
1419 ahc_inb(ahc, SEQADDR0)
1420 | (ahc_inb(ahc, SEQADDR1) << 8));
1421 }
1422 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1423 ahc_restart(ahc);
1424 } else {
1425 printf("%s: Missing case in ahc_handle_scsiint. status = %x\n",
1426 ahc_name(ahc), status);
1427 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1428 }
1429 }
1430
1431 /*
1432 * Force renegotiation to occur the next time we initiate
1433 * a command to the current device.
1434 */
1435 void
ahc_force_renegotiation(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)1436 ahc_force_renegotiation(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1437 {
1438 struct ahc_initiator_tinfo *targ_info;
1439 struct ahc_tmode_tstate *tstate;
1440
1441 targ_info = ahc_fetch_transinfo(ahc,
1442 devinfo->channel,
1443 devinfo->our_scsiid,
1444 devinfo->target,
1445 &tstate);
1446 ahc_update_neg_request(ahc, devinfo, tstate,
1447 targ_info, AHC_NEG_IF_NON_ASYNC);
1448 }
1449
1450 #define AHC_MAX_STEPS 2000
1451 void
ahc_clear_critical_section(struct ahc_softc * ahc)1452 ahc_clear_critical_section(struct ahc_softc *ahc)
1453 {
1454 int stepping;
1455 int steps;
1456 u_int simode0;
1457 u_int simode1;
1458
1459 if (ahc->num_critical_sections == 0)
1460 return;
1461
1462 stepping = FALSE;
1463 steps = 0;
1464 simode0 = 0;
1465 simode1 = 0;
1466 for (;;) {
1467 struct cs *cs;
1468 u_int seqaddr;
1469 u_int i;
1470
1471 seqaddr = ahc_inb(ahc, SEQADDR0)
1472 | (ahc_inb(ahc, SEQADDR1) << 8);
1473
1474 /*
1475 * Seqaddr represents the next instruction to execute,
1476 * so we are really executing the instruction just
1477 * before it.
1478 */
1479 cs = ahc->critical_sections;
1480 for (i = 0; i < ahc->num_critical_sections; i++, cs++) {
1481
1482 if (cs->begin < seqaddr && cs->end >= seqaddr)
1483 break;
1484 }
1485
1486 if (i == ahc->num_critical_sections)
1487 break;
1488
1489 if (steps > AHC_MAX_STEPS) {
1490 printf("%s: Infinite loop in critical section\n",
1491 ahc_name(ahc));
1492 ahc_dump_card_state(ahc);
1493 panic("critical section loop");
1494 }
1495
1496 steps++;
1497 if (stepping == FALSE) {
1498
1499 /*
1500 * Disable all interrupt sources so that the
1501 * sequencer will not be stuck by a pausing
1502 * interrupt condition while we attempt to
1503 * leave a critical section.
1504 */
1505 simode0 = ahc_inb(ahc, SIMODE0);
1506 ahc_outb(ahc, SIMODE0, 0);
1507 simode1 = ahc_inb(ahc, SIMODE1);
1508 if ((ahc->features & AHC_DT) != 0)
1509 /*
1510 * On DT class controllers, we
1511 * use the enhanced busfree logic.
1512 * Unfortunately we cannot re-enable
1513 * busfree detection within the
1514 * current connection, so we must
1515 * leave it on while single stepping.
1516 */
1517 ahc_outb(ahc, SIMODE1, simode1 & ENBUSFREE);
1518 else
1519 ahc_outb(ahc, SIMODE1, 0);
1520 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1521 ahc_outb(ahc, SEQCTL, ahc->seqctl | STEP);
1522 stepping = TRUE;
1523 }
1524 if ((ahc->features & AHC_DT) != 0) {
1525 ahc_outb(ahc, CLRSINT1, CLRBUSFREE);
1526 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1527 }
1528 ahc_outb(ahc, HCNTRL, ahc->unpause);
1529 while (!ahc_is_paused(ahc))
1530 aic_delay(200);
1531 }
1532 if (stepping) {
1533 ahc_outb(ahc, SIMODE0, simode0);
1534 ahc_outb(ahc, SIMODE1, simode1);
1535 ahc_outb(ahc, SEQCTL, ahc->seqctl);
1536 }
1537 }
1538
1539 /*
1540 * Clear any pending interrupt status.
1541 */
1542 void
ahc_clear_intstat(struct ahc_softc * ahc)1543 ahc_clear_intstat(struct ahc_softc *ahc)
1544 {
1545 /* Clear any interrupt conditions this may have caused */
1546 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI
1547 |CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG|
1548 CLRREQINIT);
1549 ahc_flush_device_writes(ahc);
1550 ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO);
1551 ahc_flush_device_writes(ahc);
1552 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1553 ahc_flush_device_writes(ahc);
1554 }
1555
1556 /**************************** Debugging Routines ******************************/
1557 #ifdef AHC_DEBUG
1558 uint32_t ahc_debug = 0; /* AHC_SHOW_MISC|AHC_SHOW_SENSE|AHC_DEBUG_OPTS;*/
1559
1560 void
ahc_print_scb(struct scb * scb)1561 ahc_print_scb(struct scb *scb)
1562 {
1563 int i;
1564
1565 struct hardware_scb *hscb = scb->hscb;
1566
1567 printf("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n",
1568 (void *)scb,
1569 hscb->control,
1570 hscb->scsiid,
1571 hscb->lun,
1572 hscb->cdb_len);
1573 printf("Shared Data: ");
1574 for (i = 0; i < sizeof(hscb->shared_data.cdb); i++)
1575 printf("%#02x", hscb->shared_data.cdb[i]);
1576 printf(" dataptr:%#x datacnt:%#x sgptr:%#x tag:%#x\n",
1577 aic_le32toh(hscb->dataptr),
1578 aic_le32toh(hscb->datacnt),
1579 aic_le32toh(hscb->sgptr),
1580 hscb->tag);
1581 if (scb->sg_count > 0) {
1582 for (i = 0; i < scb->sg_count; i++) {
1583 printf("sg[%d] - Addr 0x%x%x : Length %d\n",
1584 i,
1585 (aic_le32toh(scb->sg_list[i].len) >> 24
1586 & SG_HIGH_ADDR_BITS),
1587 aic_le32toh(scb->sg_list[i].addr),
1588 aic_le32toh(scb->sg_list[i].len));
1589 }
1590 }
1591 }
1592 #endif
1593
1594 /************************* Transfer Negotiation *******************************/
1595 /*
1596 * Allocate per target mode instance (ID we respond to as a target)
1597 * transfer negotiation data structures.
1598 */
1599 static struct ahc_tmode_tstate *
ahc_alloc_tstate(struct ahc_softc * ahc,u_int scsi_id,char channel)1600 ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel)
1601 {
1602 struct ahc_tmode_tstate *master_tstate;
1603 struct ahc_tmode_tstate *tstate;
1604 int i;
1605
1606 master_tstate = ahc->enabled_targets[ahc->our_id];
1607 if (channel == 'B') {
1608 scsi_id += 8;
1609 master_tstate = ahc->enabled_targets[ahc->our_id_b + 8];
1610 }
1611 if (ahc->enabled_targets[scsi_id] != NULL
1612 && ahc->enabled_targets[scsi_id] != master_tstate)
1613 panic("%s: ahc_alloc_tstate - Target already allocated",
1614 ahc_name(ahc));
1615 tstate = malloc(sizeof(*tstate), M_DEVBUF, M_NOWAIT | M_ZERO);
1616 if (tstate == NULL)
1617 return (NULL);
1618
1619 /*
1620 * If we have allocated a master tstate, copy user settings from
1621 * the master tstate (taken from SRAM or the EEPROM) for this
1622 * channel, but reset our current and goal settings to async/narrow
1623 * until an initiator talks to us.
1624 */
1625 if (master_tstate != NULL) {
1626 memcpy(tstate, master_tstate, sizeof(*tstate));
1627 memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns));
1628 tstate->ultraenb = 0;
1629 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1630 memset(&tstate->transinfo[i].curr, 0,
1631 sizeof(tstate->transinfo[i].curr));
1632 memset(&tstate->transinfo[i].goal, 0,
1633 sizeof(tstate->transinfo[i].goal));
1634 }
1635 }
1636 ahc->enabled_targets[scsi_id] = tstate;
1637 return (tstate);
1638 }
1639
1640 #ifdef AHC_TARGET_MODE
1641 /*
1642 * Free per target mode instance (ID we respond to as a target)
1643 * transfer negotiation data structures.
1644 */
1645 static void
ahc_free_tstate(struct ahc_softc * ahc,u_int scsi_id,char channel,int force)1646 ahc_free_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel, int force)
1647 {
1648 struct ahc_tmode_tstate *tstate;
1649
1650 /*
1651 * Don't clean up our "master" tstate.
1652 * It has our default user settings.
1653 */
1654 if (((channel == 'B' && scsi_id == ahc->our_id_b)
1655 || (channel == 'A' && scsi_id == ahc->our_id))
1656 && force == FALSE)
1657 return;
1658
1659 if (channel == 'B')
1660 scsi_id += 8;
1661 tstate = ahc->enabled_targets[scsi_id];
1662 if (tstate != NULL)
1663 free(tstate, M_DEVBUF, sizeof(*tstate));
1664 ahc->enabled_targets[scsi_id] = NULL;
1665 }
1666 #endif
1667
1668 /*
1669 * Called when we have an active connection to a target on the bus,
1670 * this function finds the nearest syncrate to the input period limited
1671 * by the capabilities of the bus connectivity of and sync settings for
1672 * the target.
1673 */
1674 struct ahc_syncrate *
ahc_devlimited_syncrate(struct ahc_softc * ahc,struct ahc_initiator_tinfo * tinfo,u_int * period,u_int * ppr_options,role_t role)1675 ahc_devlimited_syncrate(struct ahc_softc *ahc,
1676 struct ahc_initiator_tinfo *tinfo,
1677 u_int *period, u_int *ppr_options, role_t role)
1678 {
1679 struct ahc_transinfo *transinfo;
1680 u_int maxsync;
1681
1682 if ((ahc->features & AHC_ULTRA2) != 0) {
1683 if ((ahc_inb(ahc, SBLKCTL) & ENAB40) != 0
1684 && (ahc_inb(ahc, SSTAT2) & EXP_ACTIVE) == 0) {
1685 maxsync = AHC_SYNCRATE_DT;
1686 } else {
1687 maxsync = AHC_SYNCRATE_ULTRA;
1688 /* Can't do DT on an SE bus */
1689 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1690 }
1691 } else if ((ahc->features & AHC_ULTRA) != 0) {
1692 maxsync = AHC_SYNCRATE_ULTRA;
1693 } else {
1694 maxsync = AHC_SYNCRATE_FAST;
1695 }
1696 /*
1697 * Never allow a value higher than our current goal
1698 * period otherwise we may allow a target initiated
1699 * negotiation to go above the limit as set by the
1700 * user. In the case of an initiator initiated
1701 * sync negotiation, we limit based on the user
1702 * setting. This allows the system to still accept
1703 * incoming negotiations even if target initiated
1704 * negotiation is not performed.
1705 */
1706 if (role == ROLE_TARGET)
1707 transinfo = &tinfo->user;
1708 else
1709 transinfo = &tinfo->goal;
1710 *ppr_options &= transinfo->ppr_options;
1711 if (transinfo->width == MSG_EXT_WDTR_BUS_8_BIT) {
1712 maxsync = MAX(maxsync, AHC_SYNCRATE_ULTRA2);
1713 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1714 }
1715 if (transinfo->period == 0) {
1716 *period = 0;
1717 *ppr_options = 0;
1718 return (NULL);
1719 }
1720 *period = MAX(*period, transinfo->period);
1721 return (ahc_find_syncrate(ahc, period, ppr_options, maxsync));
1722 }
1723
1724 /*
1725 * Look up the valid period to SCSIRATE conversion in our table.
1726 * Return the period and offset that should be sent to the target
1727 * if this was the beginning of an SDTR.
1728 */
1729 struct ahc_syncrate *
ahc_find_syncrate(struct ahc_softc * ahc,u_int * period,u_int * ppr_options,u_int maxsync)1730 ahc_find_syncrate(struct ahc_softc *ahc, u_int *period,
1731 u_int *ppr_options, u_int maxsync)
1732 {
1733 struct ahc_syncrate *syncrate;
1734
1735 if ((ahc->features & AHC_DT) == 0)
1736 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1737
1738 /* Skip all DT only entries if DT is not available */
1739 if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0
1740 && maxsync < AHC_SYNCRATE_ULTRA2)
1741 maxsync = AHC_SYNCRATE_ULTRA2;
1742
1743 for (syncrate = &ahc_syncrates[maxsync];
1744 syncrate->rate != NULL;
1745 syncrate++) {
1746
1747 /*
1748 * The Ultra2 table doesn't go as low
1749 * as for the Fast/Ultra cards.
1750 */
1751 if ((ahc->features & AHC_ULTRA2) != 0
1752 && (syncrate->sxfr_u2 == 0))
1753 break;
1754
1755 if (*period <= syncrate->period) {
1756 /*
1757 * When responding to a target that requests
1758 * sync, the requested rate may fall between
1759 * two rates that we can output, but still be
1760 * a rate that we can receive. Because of this,
1761 * we want to respond to the target with
1762 * the same rate that it sent to us even
1763 * if the period we use to send data to it
1764 * is lower. Only lower the response period
1765 * if we must.
1766 */
1767 if (syncrate == &ahc_syncrates[maxsync])
1768 *period = syncrate->period;
1769
1770 /*
1771 * At some speeds, we only support
1772 * ST transfers.
1773 */
1774 if ((syncrate->sxfr_u2 & ST_SXFR) != 0)
1775 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1776 break;
1777 }
1778 }
1779
1780 if ((*period == 0)
1781 || (syncrate->rate == NULL)
1782 || ((ahc->features & AHC_ULTRA2) != 0
1783 && (syncrate->sxfr_u2 == 0))) {
1784 /* Use asynchronous transfers. */
1785 *period = 0;
1786 syncrate = NULL;
1787 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1788 }
1789 return (syncrate);
1790 }
1791
1792 /*
1793 * Convert from an entry in our syncrate table to the SCSI equivalent
1794 * sync "period" factor.
1795 */
1796 u_int
ahc_find_period(struct ahc_softc * ahc,u_int scsirate,u_int maxsync)1797 ahc_find_period(struct ahc_softc *ahc, u_int scsirate, u_int maxsync)
1798 {
1799 struct ahc_syncrate *syncrate;
1800
1801 if ((ahc->features & AHC_ULTRA2) != 0)
1802 scsirate &= SXFR_ULTRA2;
1803 else
1804 scsirate &= SXFR;
1805
1806 syncrate = &ahc_syncrates[maxsync];
1807 while (syncrate->rate != NULL) {
1808
1809 if ((ahc->features & AHC_ULTRA2) != 0) {
1810 if (syncrate->sxfr_u2 == 0)
1811 break;
1812 else if (scsirate == (syncrate->sxfr_u2 & SXFR_ULTRA2))
1813 return (syncrate->period);
1814 } else if (scsirate == (syncrate->sxfr & SXFR)) {
1815 return (syncrate->period);
1816 }
1817 syncrate++;
1818 }
1819 return (0); /* async */
1820 }
1821
1822 /*
1823 * Truncate the given synchronous offset to a value the
1824 * current adapter type and syncrate are capable of.
1825 */
1826 void
ahc_validate_offset(struct ahc_softc * ahc,struct ahc_initiator_tinfo * tinfo,struct ahc_syncrate * syncrate,u_int * offset,int wide,role_t role)1827 ahc_validate_offset(struct ahc_softc *ahc,
1828 struct ahc_initiator_tinfo *tinfo,
1829 struct ahc_syncrate *syncrate,
1830 u_int *offset, int wide, role_t role)
1831 {
1832 u_int maxoffset;
1833
1834 /* Limit offset to what we can do */
1835 if (syncrate == NULL) {
1836 maxoffset = 0;
1837 } else if ((ahc->features & AHC_ULTRA2) != 0) {
1838 maxoffset = MAX_OFFSET_ULTRA2;
1839 } else {
1840 if (wide)
1841 maxoffset = MAX_OFFSET_16BIT;
1842 else
1843 maxoffset = MAX_OFFSET_8BIT;
1844 }
1845 *offset = MIN(*offset, maxoffset);
1846 if (tinfo != NULL) {
1847 if (role == ROLE_TARGET)
1848 *offset = MIN(*offset, tinfo->user.offset);
1849 else
1850 *offset = MIN(*offset, tinfo->goal.offset);
1851 }
1852 }
1853
1854 /*
1855 * Truncate the given transfer width parameter to a value the
1856 * current adapter type is capable of.
1857 */
1858 void
ahc_validate_width(struct ahc_softc * ahc,struct ahc_initiator_tinfo * tinfo,u_int * bus_width,role_t role)1859 ahc_validate_width(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo,
1860 u_int *bus_width, role_t role)
1861 {
1862 switch (*bus_width) {
1863 default:
1864 if (ahc->features & AHC_WIDE) {
1865 /* Respond Wide */
1866 *bus_width = MSG_EXT_WDTR_BUS_16_BIT;
1867 break;
1868 }
1869 /* FALLTHROUGH */
1870 case MSG_EXT_WDTR_BUS_8_BIT:
1871 *bus_width = MSG_EXT_WDTR_BUS_8_BIT;
1872 break;
1873 }
1874 if (tinfo != NULL) {
1875 if (role == ROLE_TARGET)
1876 *bus_width = MIN(tinfo->user.width, *bus_width);
1877 else
1878 *bus_width = MIN(tinfo->goal.width, *bus_width);
1879 }
1880 }
1881
1882 /*
1883 * Update the bitmask of targets for which the controller should
1884 * negotiate with at the next convenient opportunity. This currently
1885 * means the next time we send the initial identify messages for
1886 * a new transaction.
1887 */
1888 int
ahc_update_neg_request(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,struct ahc_tmode_tstate * tstate,struct ahc_initiator_tinfo * tinfo,ahc_neg_type neg_type)1889 ahc_update_neg_request(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1890 struct ahc_tmode_tstate *tstate,
1891 struct ahc_initiator_tinfo *tinfo, ahc_neg_type neg_type)
1892 {
1893 u_int auto_negotiate_orig;
1894
1895 auto_negotiate_orig = tstate->auto_negotiate;
1896 if (neg_type == AHC_NEG_ALWAYS) {
1897 /*
1898 * Force our "current" settings to be
1899 * unknown so that unless a bus reset
1900 * occurs the need to renegotiate is
1901 * recorded persistently.
1902 */
1903 if ((ahc->features & AHC_WIDE) != 0)
1904 tinfo->curr.width = AHC_WIDTH_UNKNOWN;
1905 tinfo->curr.period = AHC_PERIOD_UNKNOWN;
1906 tinfo->curr.offset = AHC_OFFSET_UNKNOWN;
1907 }
1908 if (tinfo->curr.period != tinfo->goal.period
1909 || tinfo->curr.width != tinfo->goal.width
1910 || tinfo->curr.offset != tinfo->goal.offset
1911 || tinfo->curr.ppr_options != tinfo->goal.ppr_options
1912 || (neg_type == AHC_NEG_IF_NON_ASYNC
1913 && (tinfo->goal.offset != 0
1914 || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT
1915 || tinfo->goal.ppr_options != 0)))
1916 tstate->auto_negotiate |= devinfo->target_mask;
1917 else
1918 tstate->auto_negotiate &= ~devinfo->target_mask;
1919
1920 return (auto_negotiate_orig != tstate->auto_negotiate);
1921 }
1922
1923 /*
1924 * Update the user/goal/curr tables of synchronous negotiation
1925 * parameters as well as, in the case of a current or active update,
1926 * any data structures on the host controller. In the case of an
1927 * active update, the specified target is currently talking to us on
1928 * the bus, so the transfer parameter update must take effect
1929 * immediately.
1930 */
1931 void
ahc_set_syncrate(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,struct ahc_syncrate * syncrate,u_int period,u_int offset,u_int ppr_options,u_int type,int paused)1932 ahc_set_syncrate(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1933 struct ahc_syncrate *syncrate, u_int period,
1934 u_int offset, u_int ppr_options, u_int type, int paused)
1935 {
1936 struct ahc_initiator_tinfo *tinfo;
1937 struct ahc_tmode_tstate *tstate;
1938 u_int old_period;
1939 u_int old_offset;
1940 u_int old_ppr;
1941 int active;
1942 int update_needed;
1943
1944 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
1945 update_needed = 0;
1946
1947 if (syncrate == NULL) {
1948 period = 0;
1949 offset = 0;
1950 }
1951
1952 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
1953 devinfo->target, &tstate);
1954
1955 if ((type & AHC_TRANS_USER) != 0) {
1956 tinfo->user.period = period;
1957 tinfo->user.offset = offset;
1958 tinfo->user.ppr_options = ppr_options;
1959 }
1960
1961 if ((type & AHC_TRANS_GOAL) != 0) {
1962 tinfo->goal.period = period;
1963 tinfo->goal.offset = offset;
1964 tinfo->goal.ppr_options = ppr_options;
1965 }
1966
1967 old_period = tinfo->curr.period;
1968 old_offset = tinfo->curr.offset;
1969 old_ppr = tinfo->curr.ppr_options;
1970
1971 if ((type & AHC_TRANS_CUR) != 0
1972 && (old_period != period
1973 || old_offset != offset
1974 || old_ppr != ppr_options)) {
1975 u_int scsirate;
1976
1977 update_needed++;
1978 scsirate = tinfo->scsirate;
1979 if ((ahc->features & AHC_ULTRA2) != 0) {
1980
1981 scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC);
1982 if (syncrate != NULL) {
1983 scsirate |= syncrate->sxfr_u2;
1984 if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0)
1985 scsirate |= ENABLE_CRC;
1986 else
1987 scsirate |= SINGLE_EDGE;
1988 }
1989 } else {
1990
1991 scsirate &= ~(SXFR|SOFS);
1992 /*
1993 * Ensure Ultra mode is set properly for
1994 * this target.
1995 */
1996 tstate->ultraenb &= ~devinfo->target_mask;
1997 if (syncrate != NULL) {
1998 if (syncrate->sxfr & ULTRA_SXFR) {
1999 tstate->ultraenb |=
2000 devinfo->target_mask;
2001 }
2002 scsirate |= syncrate->sxfr & SXFR;
2003 scsirate |= offset & SOFS;
2004 }
2005 if (active) {
2006 u_int sxfrctl0;
2007
2008 sxfrctl0 = ahc_inb(ahc, SXFRCTL0);
2009 sxfrctl0 &= ~FAST20;
2010 if (tstate->ultraenb & devinfo->target_mask)
2011 sxfrctl0 |= FAST20;
2012 ahc_outb(ahc, SXFRCTL0, sxfrctl0);
2013 }
2014 }
2015 if (active) {
2016 ahc_outb(ahc, SCSIRATE, scsirate);
2017 if ((ahc->features & AHC_ULTRA2) != 0)
2018 ahc_outb(ahc, SCSIOFFSET, offset);
2019 }
2020
2021 tinfo->scsirate = scsirate;
2022 tinfo->curr.period = period;
2023 tinfo->curr.offset = offset;
2024 tinfo->curr.ppr_options = ppr_options;
2025
2026 ahc_send_async(ahc, devinfo->channel, devinfo->target,
2027 CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
2028 if (1 /*bootverbose*/) {
2029 if (offset != 0) {
2030 printf("%s: target %d synchronous at %sMHz%s, "
2031 "offset = 0x%x\n", ahc_name(ahc),
2032 devinfo->target, syncrate->rate,
2033 (ppr_options & MSG_EXT_PPR_DT_REQ)
2034 ? " DT" : "", offset);
2035 } else {
2036 printf("%s: target %d using "
2037 "asynchronous transfers\n",
2038 ahc_name(ahc), devinfo->target);
2039 }
2040 }
2041 }
2042
2043 update_needed += ahc_update_neg_request(ahc, devinfo, tstate,
2044 tinfo, AHC_NEG_TO_GOAL);
2045
2046 if (update_needed)
2047 ahc_update_pending_scbs(ahc);
2048 }
2049
2050 /*
2051 * Update the user/goal/curr tables of wide negotiation
2052 * parameters as well as, in the case of a current or active update,
2053 * any data structures on the host controller. In the case of an
2054 * active update, the specified target is currently talking to us on
2055 * the bus, so the transfer parameter update must take effect
2056 * immediately.
2057 */
2058 void
ahc_set_width(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,u_int width,u_int type,int paused)2059 ahc_set_width(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2060 u_int width, u_int type, int paused)
2061 {
2062 struct ahc_initiator_tinfo *tinfo;
2063 struct ahc_tmode_tstate *tstate;
2064 u_int oldwidth;
2065 int active;
2066 int update_needed;
2067
2068 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
2069 update_needed = 0;
2070 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
2071 devinfo->target, &tstate);
2072
2073 if ((type & AHC_TRANS_USER) != 0)
2074 tinfo->user.width = width;
2075
2076 if ((type & AHC_TRANS_GOAL) != 0)
2077 tinfo->goal.width = width;
2078
2079 oldwidth = tinfo->curr.width;
2080 if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) {
2081 u_int scsirate;
2082
2083 update_needed++;
2084 scsirate = tinfo->scsirate;
2085 scsirate &= ~WIDEXFER;
2086 if (width == MSG_EXT_WDTR_BUS_16_BIT)
2087 scsirate |= WIDEXFER;
2088
2089 tinfo->scsirate = scsirate;
2090
2091 if (active)
2092 ahc_outb(ahc, SCSIRATE, scsirate);
2093
2094 tinfo->curr.width = width;
2095
2096 ahc_send_async(ahc, devinfo->channel, devinfo->target,
2097 CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
2098 if (1 /*bootverbose*/) {
2099 printf("%s: target %d using %dbit transfers\n",
2100 ahc_name(ahc), devinfo->target,
2101 8 * (0x01 << width));
2102 }
2103 }
2104
2105 update_needed += ahc_update_neg_request(ahc, devinfo, tstate,
2106 tinfo, AHC_NEG_TO_GOAL);
2107 if (update_needed)
2108 ahc_update_pending_scbs(ahc);
2109 }
2110
2111 /*
2112 * Update the current state of tagged queuing for a given target.
2113 */
2114 void
ahc_set_tags(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,ahc_queue_alg alg)2115 ahc_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2116 ahc_queue_alg alg)
2117 {
2118 ahc_platform_set_tags(ahc, devinfo, alg);
2119 ahc_send_async(ahc, devinfo->channel, devinfo->target,
2120 devinfo->lun, AC_TRANSFER_NEG, &alg);
2121 }
2122
2123 /*
2124 * When the transfer settings for a connection change, update any
2125 * in-transit SCBs to contain the new data so the hardware will
2126 * be set correctly during future (re)selections.
2127 */
2128 static void
ahc_update_pending_scbs(struct ahc_softc * ahc)2129 ahc_update_pending_scbs(struct ahc_softc *ahc)
2130 {
2131 struct scb *pending_scb;
2132 int pending_scb_count;
2133 int i;
2134 int paused;
2135 u_int saved_scbptr;
2136
2137 /*
2138 * Traverse the pending SCB list and ensure that all of the
2139 * SCBs there have the proper settings.
2140 */
2141 pending_scb_count = 0;
2142 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2143 struct ahc_devinfo devinfo;
2144 struct hardware_scb *pending_hscb;
2145 struct ahc_initiator_tinfo *tinfo;
2146 struct ahc_tmode_tstate *tstate;
2147
2148 ahc_scb_devinfo(ahc, &devinfo, pending_scb);
2149 tinfo = ahc_fetch_transinfo(ahc, devinfo.channel,
2150 devinfo.our_scsiid,
2151 devinfo.target, &tstate);
2152 pending_hscb = pending_scb->hscb;
2153 pending_hscb->control &= ~ULTRAENB;
2154 if ((tstate->ultraenb & devinfo.target_mask) != 0)
2155 pending_hscb->control |= ULTRAENB;
2156 pending_hscb->scsirate = tinfo->scsirate;
2157 pending_hscb->scsioffset = tinfo->curr.offset;
2158 if ((tstate->auto_negotiate & devinfo.target_mask) == 0
2159 && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) {
2160 pending_scb->flags &= ~SCB_AUTO_NEGOTIATE;
2161 pending_hscb->control &= ~MK_MESSAGE;
2162 }
2163 ahc_sync_scb(ahc, pending_scb,
2164 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
2165 pending_scb_count++;
2166 }
2167
2168 if (pending_scb_count == 0)
2169 return;
2170
2171 if (ahc_is_paused(ahc)) {
2172 paused = 1;
2173 } else {
2174 paused = 0;
2175 ahc_pause(ahc);
2176 }
2177
2178 saved_scbptr = ahc_inb(ahc, SCBPTR);
2179 /* Ensure that the hscbs down on the card match the new information */
2180 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
2181 struct hardware_scb *pending_hscb;
2182 u_int control;
2183 u_int scb_tag;
2184
2185 ahc_outb(ahc, SCBPTR, i);
2186 scb_tag = ahc_inb(ahc, SCB_TAG);
2187 pending_scb = ahc_lookup_scb(ahc, scb_tag);
2188 if (pending_scb == NULL)
2189 continue;
2190
2191 pending_hscb = pending_scb->hscb;
2192 control = ahc_inb(ahc, SCB_CONTROL);
2193 control &= ~(ULTRAENB|MK_MESSAGE);
2194 control |= pending_hscb->control & (ULTRAENB|MK_MESSAGE);
2195 ahc_outb(ahc, SCB_CONTROL, control);
2196 ahc_outb(ahc, SCB_SCSIRATE, pending_hscb->scsirate);
2197 ahc_outb(ahc, SCB_SCSIOFFSET, pending_hscb->scsioffset);
2198 }
2199 ahc_outb(ahc, SCBPTR, saved_scbptr);
2200
2201 if (paused == 0)
2202 ahc_unpause(ahc);
2203 }
2204
2205 /**************************** Pathing Information *****************************/
2206 static void
ahc_fetch_devinfo(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)2207 ahc_fetch_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2208 {
2209 u_int saved_scsiid;
2210 role_t role;
2211 int our_id;
2212
2213 if (ahc_inb(ahc, SSTAT0) & TARGET)
2214 role = ROLE_TARGET;
2215 else
2216 role = ROLE_INITIATOR;
2217
2218 if (role == ROLE_TARGET
2219 && (ahc->features & AHC_MULTI_TID) != 0
2220 && (ahc_inb(ahc, SEQ_FLAGS)
2221 & (CMDPHASE_PENDING|TARG_CMD_PENDING|NO_DISCONNECT)) != 0) {
2222 /* We were selected, so pull our id from TARGIDIN */
2223 our_id = ahc_inb(ahc, TARGIDIN) & OID;
2224 } else if ((ahc->features & AHC_ULTRA2) != 0)
2225 our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID;
2226 else
2227 our_id = ahc_inb(ahc, SCSIID) & OID;
2228
2229 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2230 ahc_compile_devinfo(devinfo,
2231 our_id,
2232 SCSIID_TARGET(ahc, saved_scsiid),
2233 ahc_inb(ahc, SAVED_LUN),
2234 SCSIID_CHANNEL(ahc, saved_scsiid),
2235 role);
2236 }
2237
2238 struct ahc_phase_table_entry*
ahc_lookup_phase_entry(int phase)2239 ahc_lookup_phase_entry(int phase)
2240 {
2241 struct ahc_phase_table_entry *entry;
2242 struct ahc_phase_table_entry *last_entry;
2243
2244 /*
2245 * num_phases doesn't include the default entry which
2246 * will be returned if the phase doesn't match.
2247 */
2248 last_entry = &ahc_phase_table[num_phases];
2249 for (entry = ahc_phase_table; entry < last_entry; entry++) {
2250 if (phase == entry->phase)
2251 break;
2252 }
2253 return (entry);
2254 }
2255
2256 void
ahc_compile_devinfo(struct ahc_devinfo * devinfo,u_int our_id,u_int target,u_int lun,char channel,role_t role)2257 ahc_compile_devinfo(struct ahc_devinfo *devinfo, u_int our_id, u_int target,
2258 u_int lun, char channel, role_t role)
2259 {
2260 devinfo->our_scsiid = our_id;
2261 devinfo->target = target;
2262 devinfo->lun = lun;
2263 devinfo->target_offset = target;
2264 devinfo->channel = channel;
2265 devinfo->role = role;
2266 if (channel == 'B')
2267 devinfo->target_offset += 8;
2268 devinfo->target_mask = (0x01 << devinfo->target_offset);
2269 }
2270
2271 void
ahc_print_devinfo(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)2272 ahc_print_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2273 {
2274 printf("%s:%c:%d:%d: ", ahc_name(ahc), devinfo->channel,
2275 devinfo->target, devinfo->lun);
2276 }
2277
2278 void
ahc_scb_devinfo(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,struct scb * scb)2279 ahc_scb_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2280 struct scb *scb)
2281 {
2282 role_t role;
2283 int our_id;
2284
2285 our_id = SCSIID_OUR_ID(scb->hscb->scsiid);
2286 role = ROLE_INITIATOR;
2287 if ((scb->flags & SCB_TARGET_SCB) != 0)
2288 role = ROLE_TARGET;
2289 ahc_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahc, scb),
2290 SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahc, scb), role);
2291 }
2292
2293
2294 /************************ Message Phase Processing ****************************/
2295 static void
ahc_assert_atn(struct ahc_softc * ahc)2296 ahc_assert_atn(struct ahc_softc *ahc)
2297 {
2298 u_int scsisigo;
2299
2300 scsisigo = ATNO;
2301 if ((ahc->features & AHC_DT) == 0)
2302 scsisigo |= ahc_inb(ahc, SCSISIGI);
2303 ahc_outb(ahc, SCSISIGO, scsisigo);
2304 }
2305
2306 /*
2307 * When an initiator transaction with the MK_MESSAGE flag either reconnects
2308 * or enters the initial message out phase, we are interrupted. Fill our
2309 * outgoing message buffer with the appropriate message and begin handing
2310 * the message phase(s) manually.
2311 */
2312 static void
ahc_setup_initiator_msgout(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,struct scb * scb)2313 ahc_setup_initiator_msgout(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2314 struct scb *scb)
2315 {
2316 /*
2317 * To facilitate adding multiple messages together,
2318 * each routine should increment the index and len
2319 * variables instead of setting them explicitly.
2320 */
2321 ahc->msgout_index = 0;
2322 ahc->msgout_len = 0;
2323
2324 if ((scb->flags & SCB_DEVICE_RESET) == 0
2325 && ahc_inb(ahc, MSG_OUT) == MSG_IDENTIFYFLAG) {
2326 u_int identify_msg;
2327
2328 identify_msg = MSG_IDENTIFYFLAG | SCB_GET_LUN(scb);
2329 if ((scb->hscb->control & DISCENB) != 0)
2330 identify_msg |= MSG_IDENTIFY_DISCFLAG;
2331 ahc->msgout_buf[ahc->msgout_index++] = identify_msg;
2332 ahc->msgout_len++;
2333
2334 if ((scb->hscb->control & TAG_ENB) != 0) {
2335 ahc->msgout_buf[ahc->msgout_index++] =
2336 scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE);
2337 ahc->msgout_buf[ahc->msgout_index++] = scb->hscb->tag;
2338 ahc->msgout_len += 2;
2339 }
2340 }
2341
2342 if (scb->flags & SCB_DEVICE_RESET) {
2343 ahc->msgout_buf[ahc->msgout_index++] = MSG_BUS_DEV_RESET;
2344 ahc->msgout_len++;
2345 ahc_print_path(ahc, scb);
2346 printf("Bus Device Reset Message Sent\n");
2347 /*
2348 * Clear our selection hardware in advance of
2349 * the busfree. We may have an entry in the waiting
2350 * Q for this target, and we don't want to go about
2351 * selecting while we handle the busfree and blow it
2352 * away.
2353 */
2354 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
2355 } else if ((scb->flags & SCB_ABORT) != 0) {
2356 if ((scb->hscb->control & TAG_ENB) != 0)
2357 ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT_TAG;
2358 else
2359 ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT;
2360 ahc->msgout_len++;
2361 ahc_print_path(ahc, scb);
2362 printf("Abort%s Message Sent\n",
2363 (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : "");
2364 /*
2365 * Clear our selection hardware in advance of
2366 * the busfree. We may have an entry in the waiting
2367 * Q for this target, and we don't want to go about
2368 * selecting while we handle the busfree and blow it
2369 * away.
2370 */
2371 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
2372 } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) {
2373 ahc_build_transfer_msg(ahc, devinfo);
2374 } else {
2375 printf("ahc_intr: AWAITING_MSG for an SCB that "
2376 "does not have a waiting message\n");
2377 printf("SCSIID = %x, target_mask = %x\n", scb->hscb->scsiid,
2378 devinfo->target_mask);
2379 panic("SCB = %d, SCB Control = %x, MSG_OUT = %x "
2380 "SCB flags = %x", scb->hscb->tag, scb->hscb->control,
2381 ahc_inb(ahc, MSG_OUT), scb->flags);
2382 }
2383
2384 /*
2385 * Clear the MK_MESSAGE flag from the SCB so we aren't
2386 * asked to send this message again.
2387 */
2388 ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL) & ~MK_MESSAGE);
2389 scb->hscb->control &= ~MK_MESSAGE;
2390 ahc->msgout_index = 0;
2391 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2392 }
2393
2394 /*
2395 * Build an appropriate transfer negotiation message for the
2396 * currently active target.
2397 */
2398 static void
ahc_build_transfer_msg(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)2399 ahc_build_transfer_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2400 {
2401 /*
2402 * We need to initiate transfer negotiations.
2403 * If our current and goal settings are identical,
2404 * we want to renegotiate due to a check condition.
2405 */
2406 struct ahc_initiator_tinfo *tinfo;
2407 struct ahc_tmode_tstate *tstate;
2408 struct ahc_syncrate *rate;
2409 int dowide;
2410 int dosync;
2411 int doppr;
2412 u_int period;
2413 u_int ppr_options;
2414 u_int offset;
2415
2416 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
2417 devinfo->target, &tstate);
2418 /*
2419 * Filter our period based on the current connection.
2420 * If we can't perform DT transfers on this segment (not in LVD
2421 * mode for instance), then our decision to issue a PPR message
2422 * may change.
2423 */
2424 period = tinfo->goal.period;
2425 offset = tinfo->goal.offset;
2426 ppr_options = tinfo->goal.ppr_options;
2427 /* Target initiated PPR is not allowed in the SCSI spec */
2428 if (devinfo->role == ROLE_TARGET)
2429 ppr_options = 0;
2430 rate = ahc_devlimited_syncrate(ahc, tinfo, &period,
2431 &ppr_options, devinfo->role);
2432 dowide = tinfo->curr.width != tinfo->goal.width;
2433 dosync = tinfo->curr.offset != offset || tinfo->curr.period != period;
2434 /*
2435 * Only use PPR if we have options that need it, even if the device
2436 * claims to support it. There might be an expander in the way
2437 * that doesn't.
2438 */
2439 doppr = ppr_options != 0;
2440
2441 if (!dowide && !dosync && !doppr) {
2442 dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT;
2443 dosync = tinfo->goal.offset != 0;
2444 }
2445
2446 if (!dowide && !dosync && !doppr) {
2447 /*
2448 * Force async with a WDTR message if we have a wide bus,
2449 * or just issue an SDTR with a 0 offset.
2450 */
2451 if ((ahc->features & AHC_WIDE) != 0)
2452 dowide = 1;
2453 else
2454 dosync = 1;
2455
2456 if (bootverbose) {
2457 ahc_print_devinfo(ahc, devinfo);
2458 printf("Ensuring async\n");
2459 }
2460 }
2461
2462 /* Target initiated PPR is not allowed in the SCSI spec */
2463 if (devinfo->role == ROLE_TARGET)
2464 doppr = 0;
2465
2466 /*
2467 * Both the PPR message and SDTR message require the
2468 * goal syncrate to be limited to what the target device
2469 * is capable of handling (based on whether an LVD->SE
2470 * expander is on the bus), so combine these two cases.
2471 * Regardless, guarantee that if we are using WDTR and SDTR
2472 * messages that WDTR comes first.
2473 */
2474 if (doppr || (dosync && !dowide)) {
2475
2476 offset = tinfo->goal.offset;
2477 ahc_validate_offset(ahc, tinfo, rate, &offset,
2478 doppr ? tinfo->goal.width
2479 : tinfo->curr.width,
2480 devinfo->role);
2481 if (doppr) {
2482 ahc_construct_ppr(ahc, devinfo, period, offset,
2483 tinfo->goal.width, ppr_options);
2484 } else {
2485 ahc_construct_sdtr(ahc, devinfo, period, offset);
2486 }
2487 } else {
2488 ahc_construct_wdtr(ahc, devinfo, tinfo->goal.width);
2489 }
2490 }
2491
2492 /*
2493 * Build a synchronous negotiation message in our message
2494 * buffer based on the input parameters.
2495 */
2496 static void
ahc_construct_sdtr(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,u_int period,u_int offset)2497 ahc_construct_sdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2498 u_int period, u_int offset)
2499 {
2500 if (offset == 0)
2501 period = AHC_ASYNC_XFER_PERIOD;
2502 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED;
2503 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_SDTR_LEN;
2504 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_SDTR;
2505 ahc->msgout_buf[ahc->msgout_index++] = period;
2506 ahc->msgout_buf[ahc->msgout_index++] = offset;
2507 ahc->msgout_len += 5;
2508 if (bootverbose) {
2509 printf("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n",
2510 ahc_name(ahc), devinfo->channel, devinfo->target,
2511 devinfo->lun, period, offset);
2512 }
2513 }
2514
2515 /*
2516 * Build a wide negotiation message in our message
2517 * buffer based on the input parameters.
2518 */
2519 static void
ahc_construct_wdtr(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,u_int bus_width)2520 ahc_construct_wdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2521 u_int bus_width)
2522 {
2523 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED;
2524 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_WDTR_LEN;
2525 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_WDTR;
2526 ahc->msgout_buf[ahc->msgout_index++] = bus_width;
2527 ahc->msgout_len += 4;
2528 if (bootverbose) {
2529 printf("(%s:%c:%d:%d): Sending WDTR %x\n",
2530 ahc_name(ahc), devinfo->channel, devinfo->target,
2531 devinfo->lun, bus_width);
2532 }
2533 }
2534
2535 /*
2536 * Build a parallel protocol request message in our message
2537 * buffer based on the input parameters.
2538 */
2539 static void
ahc_construct_ppr(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,u_int period,u_int offset,u_int bus_width,u_int ppr_options)2540 ahc_construct_ppr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2541 u_int period, u_int offset, u_int bus_width,
2542 u_int ppr_options)
2543 {
2544 if (offset == 0)
2545 period = AHC_ASYNC_XFER_PERIOD;
2546 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED;
2547 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_PPR_LEN;
2548 ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_PPR;
2549 ahc->msgout_buf[ahc->msgout_index++] = period;
2550 ahc->msgout_buf[ahc->msgout_index++] = 0;
2551 ahc->msgout_buf[ahc->msgout_index++] = offset;
2552 ahc->msgout_buf[ahc->msgout_index++] = bus_width;
2553 ahc->msgout_buf[ahc->msgout_index++] = ppr_options;
2554 ahc->msgout_len += 8;
2555 if (bootverbose) {
2556 printf("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, "
2557 "offset %x, ppr_options %x\n", ahc_name(ahc),
2558 devinfo->channel, devinfo->target, devinfo->lun,
2559 bus_width, period, offset, ppr_options);
2560 }
2561 }
2562
2563 /*
2564 * Clear any active message state.
2565 */
2566 static void
ahc_clear_msg_state(struct ahc_softc * ahc)2567 ahc_clear_msg_state(struct ahc_softc *ahc)
2568 {
2569 ahc->msgout_len = 0;
2570 ahc->msgin_index = 0;
2571 ahc->msg_type = MSG_TYPE_NONE;
2572 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0) {
2573 /*
2574 * The target didn't care to respond to our
2575 * message request, so clear ATN.
2576 */
2577 ahc_outb(ahc, CLRSINT1, CLRATNO);
2578 }
2579 ahc_outb(ahc, MSG_OUT, MSG_NOOP);
2580 ahc_outb(ahc, SEQ_FLAGS2,
2581 ahc_inb(ahc, SEQ_FLAGS2) & ~TARGET_MSG_PENDING);
2582 }
2583
2584 static void
ahc_handle_proto_violation(struct ahc_softc * ahc)2585 ahc_handle_proto_violation(struct ahc_softc *ahc)
2586 {
2587 struct ahc_devinfo devinfo;
2588 struct scb *scb;
2589 u_int scbid;
2590 u_int seq_flags;
2591 u_int curphase;
2592 u_int lastphase;
2593 int found;
2594
2595 ahc_fetch_devinfo(ahc, &devinfo);
2596 scbid = ahc_inb(ahc, SCB_TAG);
2597 scb = ahc_lookup_scb(ahc, scbid);
2598 seq_flags = ahc_inb(ahc, SEQ_FLAGS);
2599 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
2600 lastphase = ahc_inb(ahc, LASTPHASE);
2601 if ((seq_flags & NOT_IDENTIFIED) != 0) {
2602
2603 /*
2604 * The reconnecting target either did not send an
2605 * identify message, or did, but we didn't find an SCB
2606 * to match.
2607 */
2608 ahc_print_devinfo(ahc, &devinfo);
2609 printf("Target did not send an IDENTIFY message. "
2610 "LASTPHASE = 0x%x.\n", lastphase);
2611 scb = NULL;
2612 } else if (scb == NULL) {
2613 /*
2614 * We don't seem to have an SCB active for this
2615 * transaction. Print an error and reset the bus.
2616 */
2617 ahc_print_devinfo(ahc, &devinfo);
2618 printf("No SCB found during protocol violation\n");
2619 goto proto_violation_reset;
2620 } else {
2621 ahc_set_transaction_status(scb, CAM_SEQUENCE_FAIL);
2622 if ((seq_flags & NO_CDB_SENT) != 0) {
2623 ahc_print_path(ahc, scb);
2624 printf("No or incomplete CDB sent to device.\n");
2625 } else if ((ahc_inb(ahc, SCB_CONTROL) & STATUS_RCVD) == 0) {
2626 /*
2627 * The target never bothered to provide status to
2628 * us prior to completing the command. Since we don't
2629 * know the disposition of this command, we must attempt
2630 * to abort it. Assert ATN and prepare to send an abort
2631 * message.
2632 */
2633 ahc_print_path(ahc, scb);
2634 printf("Completed command without status.\n");
2635 } else {
2636 ahc_print_path(ahc, scb);
2637 printf("Unknown protocol violation.\n");
2638 ahc_dump_card_state(ahc);
2639 }
2640 }
2641 if ((lastphase & ~P_DATAIN_DT) == 0
2642 || lastphase == P_COMMAND) {
2643 proto_violation_reset:
2644 /*
2645 * Target either went directly to data/command
2646 * phase or didn't respond to our ATN.
2647 * The only safe thing to do is to blow
2648 * it away with a bus reset.
2649 */
2650 found = ahc_reset_channel(ahc, 'A', TRUE);
2651 printf("%s: Issued Channel %c Bus Reset. "
2652 "%d SCBs aborted\n", ahc_name(ahc), 'A', found);
2653 } else {
2654 /*
2655 * Leave the selection hardware off in case
2656 * this abort attempt will affect yet to
2657 * be sent commands.
2658 */
2659 ahc_outb(ahc, SCSISEQ,
2660 ahc_inb(ahc, SCSISEQ) & ~ENSELO);
2661 ahc_assert_atn(ahc);
2662 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2663 if (scb == NULL) {
2664 ahc_print_devinfo(ahc, &devinfo);
2665 ahc->msgout_buf[0] = MSG_ABORT_TASK;
2666 ahc->msgout_len = 1;
2667 ahc->msgout_index = 0;
2668 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2669 } else {
2670 ahc_print_path(ahc, scb);
2671 scb->flags |= SCB_ABORT;
2672 }
2673 printf("Protocol violation %s. Attempting to abort.\n",
2674 ahc_lookup_phase_entry(curphase)->phasemsg);
2675 }
2676 }
2677
2678 /*
2679 * Manual message loop handler.
2680 */
2681 static void
ahc_handle_message_phase(struct ahc_softc * ahc)2682 ahc_handle_message_phase(struct ahc_softc *ahc)
2683 {
2684 struct ahc_devinfo devinfo;
2685 u_int bus_phase;
2686 int end_session;
2687
2688 ahc_fetch_devinfo(ahc, &devinfo);
2689 end_session = FALSE;
2690 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
2691
2692 reswitch:
2693 switch (ahc->msg_type) {
2694 case MSG_TYPE_INITIATOR_MSGOUT:
2695 {
2696 int lastbyte;
2697 int phasemis;
2698 int msgdone;
2699
2700 if (ahc->msgout_len == 0)
2701 panic("HOST_MSG_LOOP interrupt with no active message");
2702
2703 #ifdef AHC_DEBUG
2704 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2705 ahc_print_devinfo(ahc, &devinfo);
2706 printf("INITIATOR_MSG_OUT");
2707 }
2708 #endif
2709 phasemis = bus_phase != P_MESGOUT;
2710 if (phasemis) {
2711 #ifdef AHC_DEBUG
2712 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2713 printf(" PHASEMIS %s\n",
2714 ahc_lookup_phase_entry(bus_phase)
2715 ->phasemsg);
2716 }
2717 #endif
2718 if (bus_phase == P_MESGIN) {
2719 /*
2720 * Change gears and see if
2721 * this messages is of interest to
2722 * us or should be passed back to
2723 * the sequencer.
2724 */
2725 ahc_outb(ahc, CLRSINT1, CLRATNO);
2726 ahc->send_msg_perror = FALSE;
2727 ahc->msg_type = MSG_TYPE_INITIATOR_MSGIN;
2728 ahc->msgin_index = 0;
2729 goto reswitch;
2730 }
2731 end_session = TRUE;
2732 break;
2733 }
2734
2735 if (ahc->send_msg_perror) {
2736 ahc_outb(ahc, CLRSINT1, CLRATNO);
2737 ahc_outb(ahc, CLRSINT1, CLRREQINIT);
2738 #ifdef AHC_DEBUG
2739 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2740 printf(" byte 0x%x\n", ahc->send_msg_perror);
2741 #endif
2742 ahc_outb(ahc, SCSIDATL, MSG_PARITY_ERROR);
2743 break;
2744 }
2745
2746 msgdone = ahc->msgout_index == ahc->msgout_len;
2747 if (msgdone) {
2748 /*
2749 * The target has requested a retry.
2750 * Re-assert ATN, reset our message index to
2751 * 0, and try again.
2752 */
2753 ahc->msgout_index = 0;
2754 ahc_assert_atn(ahc);
2755 }
2756
2757 lastbyte = ahc->msgout_index == (ahc->msgout_len - 1);
2758 if (lastbyte) {
2759 /* Last byte is signified by dropping ATN */
2760 ahc_outb(ahc, CLRSINT1, CLRATNO);
2761 }
2762
2763 /*
2764 * Clear our interrupt status and present
2765 * the next byte on the bus.
2766 */
2767 ahc_outb(ahc, CLRSINT1, CLRREQINIT);
2768 #ifdef AHC_DEBUG
2769 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2770 printf(" byte 0x%x\n",
2771 ahc->msgout_buf[ahc->msgout_index]);
2772 #endif
2773 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]);
2774 break;
2775 }
2776 case MSG_TYPE_INITIATOR_MSGIN:
2777 {
2778 int phasemis;
2779 int message_done;
2780
2781 #ifdef AHC_DEBUG
2782 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2783 ahc_print_devinfo(ahc, &devinfo);
2784 printf("INITIATOR_MSG_IN");
2785 }
2786 #endif
2787 phasemis = bus_phase != P_MESGIN;
2788 if (phasemis) {
2789 #ifdef AHC_DEBUG
2790 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2791 printf(" PHASEMIS %s\n",
2792 ahc_lookup_phase_entry(bus_phase)
2793 ->phasemsg);
2794 }
2795 #endif
2796 ahc->msgin_index = 0;
2797 if (bus_phase == P_MESGOUT
2798 && (ahc->send_msg_perror == TRUE
2799 || (ahc->msgout_len != 0
2800 && ahc->msgout_index == 0))) {
2801 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2802 goto reswitch;
2803 }
2804 end_session = TRUE;
2805 break;
2806 }
2807
2808 /* Pull the byte in without acking it */
2809 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIBUSL);
2810 #ifdef AHC_DEBUG
2811 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2812 printf(" byte 0x%x\n",
2813 ahc->msgin_buf[ahc->msgin_index]);
2814 #endif
2815
2816 message_done = ahc_parse_msg(ahc, &devinfo);
2817
2818 if (message_done) {
2819 /*
2820 * Clear our incoming message buffer in case there
2821 * is another message following this one.
2822 */
2823 ahc->msgin_index = 0;
2824
2825 /*
2826 * If this message illicited a response,
2827 * assert ATN so the target takes us to the
2828 * message out phase.
2829 */
2830 if (ahc->msgout_len != 0) {
2831 #ifdef AHC_DEBUG
2832 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2833 ahc_print_devinfo(ahc, &devinfo);
2834 printf("Asserting ATN for response\n");
2835 }
2836 #endif
2837 ahc_assert_atn(ahc);
2838 }
2839 } else
2840 ahc->msgin_index++;
2841
2842 if (message_done == MSGLOOP_TERMINATED) {
2843 end_session = TRUE;
2844 } else {
2845 /* Ack the byte */
2846 ahc_outb(ahc, CLRSINT1, CLRREQINIT);
2847 ahc_inb(ahc, SCSIDATL);
2848 }
2849 break;
2850 }
2851 case MSG_TYPE_TARGET_MSGIN:
2852 {
2853 int msgdone;
2854 int msgout_request;
2855
2856 if (ahc->msgout_len == 0)
2857 panic("Target MSGIN with no active message");
2858
2859 /*
2860 * If we interrupted a mesgout session, the initiator
2861 * will not know this until our first REQ. So, we
2862 * only honor mesgout requests after we've sent our
2863 * first byte.
2864 */
2865 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0
2866 && ahc->msgout_index > 0)
2867 msgout_request = TRUE;
2868 else
2869 msgout_request = FALSE;
2870
2871 if (msgout_request) {
2872
2873 /*
2874 * Change gears and see if
2875 * this messages is of interest to
2876 * us or should be passed back to
2877 * the sequencer.
2878 */
2879 ahc->msg_type = MSG_TYPE_TARGET_MSGOUT;
2880 ahc_outb(ahc, SCSISIGO, P_MESGOUT | BSYO);
2881 ahc->msgin_index = 0;
2882 /* Dummy read to REQ for first byte */
2883 ahc_inb(ahc, SCSIDATL);
2884 ahc_outb(ahc, SXFRCTL0,
2885 ahc_inb(ahc, SXFRCTL0) | SPIOEN);
2886 break;
2887 }
2888
2889 msgdone = ahc->msgout_index == ahc->msgout_len;
2890 if (msgdone) {
2891 ahc_outb(ahc, SXFRCTL0,
2892 ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
2893 end_session = TRUE;
2894 break;
2895 }
2896
2897 /*
2898 * Present the next byte on the bus.
2899 */
2900 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN);
2901 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]);
2902 break;
2903 }
2904 case MSG_TYPE_TARGET_MSGOUT:
2905 {
2906 int lastbyte;
2907 int msgdone;
2908
2909 /*
2910 * The initiator signals that this is
2911 * the last byte by dropping ATN.
2912 */
2913 lastbyte = (ahc_inb(ahc, SCSISIGI) & ATNI) == 0;
2914
2915 /*
2916 * Read the latched byte, but turn off SPIOEN first
2917 * so that we don't inadvertently cause a REQ for the
2918 * next byte.
2919 */
2920 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
2921 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIDATL);
2922 msgdone = ahc_parse_msg(ahc, &devinfo);
2923 if (msgdone == MSGLOOP_TERMINATED) {
2924 /*
2925 * The message is *really* done in that it caused
2926 * us to go to bus free. The sequencer has already
2927 * been reset at this point, so pull the ejection
2928 * handle.
2929 */
2930 return;
2931 }
2932
2933 ahc->msgin_index++;
2934
2935 /*
2936 * XXX Read spec about initiator dropping ATN too soon
2937 * and use msgdone to detect it.
2938 */
2939 if (msgdone == MSGLOOP_MSGCOMPLETE) {
2940 ahc->msgin_index = 0;
2941
2942 /*
2943 * If this message illicited a response, transition
2944 * to the Message in phase and send it.
2945 */
2946 if (ahc->msgout_len != 0) {
2947 ahc_outb(ahc, SCSISIGO, P_MESGIN | BSYO);
2948 ahc_outb(ahc, SXFRCTL0,
2949 ahc_inb(ahc, SXFRCTL0) | SPIOEN);
2950 ahc->msg_type = MSG_TYPE_TARGET_MSGIN;
2951 ahc->msgin_index = 0;
2952 break;
2953 }
2954 }
2955
2956 if (lastbyte)
2957 end_session = TRUE;
2958 else {
2959 /* Ask for the next byte. */
2960 ahc_outb(ahc, SXFRCTL0,
2961 ahc_inb(ahc, SXFRCTL0) | SPIOEN);
2962 }
2963
2964 break;
2965 }
2966 default:
2967 panic("Unknown REQINIT message type");
2968 }
2969
2970 if (end_session) {
2971 ahc_clear_msg_state(ahc);
2972 ahc_outb(ahc, RETURN_1, EXIT_MSG_LOOP);
2973 } else
2974 ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP);
2975 }
2976
2977 /*
2978 * See if we sent a particular extended message to the target.
2979 * If "full" is true, return true only if the target saw the full
2980 * message. If "full" is false, return true if the target saw at
2981 * least the first byte of the message.
2982 */
2983 static int
ahc_sent_msg(struct ahc_softc * ahc,ahc_msgtype type,u_int msgval,int full)2984 ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, u_int msgval, int full)
2985 {
2986 int found;
2987 u_int index;
2988
2989 found = FALSE;
2990 index = 0;
2991
2992 while (index < ahc->msgout_len) {
2993 if (ahc->msgout_buf[index] == MSG_EXTENDED) {
2994 u_int end_index;
2995
2996 end_index = index + 1 + ahc->msgout_buf[index + 1];
2997 if (ahc->msgout_buf[index+2] == msgval
2998 && type == AHCMSG_EXT) {
2999
3000 if (full) {
3001 if (ahc->msgout_index > end_index)
3002 found = TRUE;
3003 } else if (ahc->msgout_index > index)
3004 found = TRUE;
3005 }
3006 index = end_index;
3007 } else if (ahc->msgout_buf[index] >= MSG_SIMPLE_TASK
3008 && ahc->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) {
3009
3010 /* Skip tag type and tag id or residue param*/
3011 index += 2;
3012 } else {
3013 /* Single byte message */
3014 if (type == AHCMSG_1B
3015 && ahc->msgout_buf[index] == msgval
3016 && ahc->msgout_index > index)
3017 found = TRUE;
3018 index++;
3019 }
3020
3021 if (found)
3022 break;
3023 }
3024 return (found);
3025 }
3026
3027 /*
3028 * Wait for a complete incoming message, parse it, and respond accordingly.
3029 */
3030 static int
ahc_parse_msg(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)3031 ahc_parse_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
3032 {
3033 struct ahc_initiator_tinfo *tinfo;
3034 struct ahc_tmode_tstate *tstate;
3035 int reject;
3036 int done;
3037 int response;
3038 u_int targ_scsirate;
3039
3040 done = MSGLOOP_IN_PROG;
3041 response = FALSE;
3042 reject = FALSE;
3043 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
3044 devinfo->target, &tstate);
3045 targ_scsirate = tinfo->scsirate;
3046
3047 /*
3048 * Parse as much of the message as is available,
3049 * rejecting it if we don't support it. When
3050 * the entire message is available and has been
3051 * handled, return MSGLOOP_MSGCOMPLETE, indicating
3052 * that we have parsed an entire message.
3053 *
3054 * In the case of extended messages, we accept the length
3055 * byte outright and perform more checking once we know the
3056 * extended message type.
3057 */
3058 switch (ahc->msgin_buf[0]) {
3059 case MSG_DISCONNECT:
3060 case MSG_SAVEDATAPOINTER:
3061 case MSG_CMDCOMPLETE:
3062 case MSG_RESTOREPOINTERS:
3063 case MSG_IGN_WIDE_RESIDUE:
3064 /*
3065 * End our message loop as these are messages
3066 * the sequencer handles on its own.
3067 */
3068 done = MSGLOOP_TERMINATED;
3069 break;
3070 case MSG_MESSAGE_REJECT:
3071 response = ahc_handle_msg_reject(ahc, devinfo);
3072 /* FALLTHROUGH */
3073 case MSG_NOOP:
3074 done = MSGLOOP_MSGCOMPLETE;
3075 break;
3076 case MSG_EXTENDED:
3077 {
3078 /* Wait for enough of the message to begin validation */
3079 if (ahc->msgin_index < 2)
3080 break;
3081 switch (ahc->msgin_buf[2]) {
3082 case MSG_EXT_SDTR:
3083 {
3084 struct ahc_syncrate *syncrate;
3085 u_int period;
3086 u_int ppr_options;
3087 u_int offset;
3088 u_int saved_offset;
3089
3090 if (ahc->msgin_buf[1] != MSG_EXT_SDTR_LEN) {
3091 reject = TRUE;
3092 break;
3093 }
3094
3095 /*
3096 * Wait until we have both args before validating
3097 * and acting on this message.
3098 *
3099 * Add one to MSG_EXT_SDTR_LEN to account for
3100 * the extended message preamble.
3101 */
3102 if (ahc->msgin_index < (MSG_EXT_SDTR_LEN + 1))
3103 break;
3104
3105 period = ahc->msgin_buf[3];
3106 ppr_options = 0;
3107 saved_offset = offset = ahc->msgin_buf[4];
3108 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period,
3109 &ppr_options,
3110 devinfo->role);
3111 ahc_validate_offset(ahc, tinfo, syncrate, &offset,
3112 targ_scsirate & WIDEXFER,
3113 devinfo->role);
3114 if (bootverbose) {
3115 printf("(%s:%c:%d:%d): Received "
3116 "SDTR period %x, offset %x\n\t"
3117 "Filtered to period %x, offset %x\n",
3118 ahc_name(ahc), devinfo->channel,
3119 devinfo->target, devinfo->lun,
3120 ahc->msgin_buf[3], saved_offset,
3121 period, offset);
3122 }
3123 ahc_set_syncrate(ahc, devinfo,
3124 syncrate, period,
3125 offset, ppr_options,
3126 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3127 /*paused*/TRUE);
3128
3129 /*
3130 * See if we initiated Sync Negotiation
3131 * and didn't have to fall down to async
3132 * transfers.
3133 */
3134 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, TRUE)) {
3135 /* We started it */
3136 if (saved_offset != offset) {
3137 /* Went too low - force async */
3138 reject = TRUE;
3139 }
3140 } else {
3141 /*
3142 * Send our own SDTR in reply
3143 */
3144 if (bootverbose
3145 && devinfo->role == ROLE_INITIATOR) {
3146 printf("(%s:%c:%d:%d): Target "
3147 "Initiated SDTR\n",
3148 ahc_name(ahc), devinfo->channel,
3149 devinfo->target, devinfo->lun);
3150 }
3151 ahc->msgout_index = 0;
3152 ahc->msgout_len = 0;
3153 ahc_construct_sdtr(ahc, devinfo,
3154 period, offset);
3155 ahc->msgout_index = 0;
3156 response = TRUE;
3157 }
3158 done = MSGLOOP_MSGCOMPLETE;
3159 break;
3160 }
3161 case MSG_EXT_WDTR:
3162 {
3163 u_int bus_width;
3164 u_int saved_width;
3165 u_int sending_reply;
3166
3167 sending_reply = FALSE;
3168 if (ahc->msgin_buf[1] != MSG_EXT_WDTR_LEN) {
3169 reject = TRUE;
3170 break;
3171 }
3172
3173 /*
3174 * Wait until we have our arg before validating
3175 * and acting on this message.
3176 *
3177 * Add one to MSG_EXT_WDTR_LEN to account for
3178 * the extended message preamble.
3179 */
3180 if (ahc->msgin_index < (MSG_EXT_WDTR_LEN + 1))
3181 break;
3182
3183 bus_width = ahc->msgin_buf[3];
3184 saved_width = bus_width;
3185 ahc_validate_width(ahc, tinfo, &bus_width,
3186 devinfo->role);
3187 if (bootverbose) {
3188 printf("(%s:%c:%d:%d): Received WDTR "
3189 "%x filtered to %x\n",
3190 ahc_name(ahc), devinfo->channel,
3191 devinfo->target, devinfo->lun,
3192 saved_width, bus_width);
3193 }
3194
3195 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, TRUE)) {
3196 /*
3197 * Don't send a WDTR back to the
3198 * target, since we asked first.
3199 * If the width went higher than our
3200 * request, reject it.
3201 */
3202 if (saved_width > bus_width) {
3203 reject = TRUE;
3204 printf("(%s:%c:%d:%d): requested %dBit "
3205 "transfers. Rejecting...\n",
3206 ahc_name(ahc), devinfo->channel,
3207 devinfo->target, devinfo->lun,
3208 8 * (0x01 << bus_width));
3209 bus_width = 0;
3210 }
3211 } else {
3212 /*
3213 * Send our own WDTR in reply
3214 */
3215 if (bootverbose
3216 && devinfo->role == ROLE_INITIATOR) {
3217 printf("(%s:%c:%d:%d): Target "
3218 "Initiated WDTR\n",
3219 ahc_name(ahc), devinfo->channel,
3220 devinfo->target, devinfo->lun);
3221 }
3222 ahc->msgout_index = 0;
3223 ahc->msgout_len = 0;
3224 ahc_construct_wdtr(ahc, devinfo, bus_width);
3225 ahc->msgout_index = 0;
3226 response = TRUE;
3227 sending_reply = TRUE;
3228 }
3229 /*
3230 * After a wide message, we are async, but
3231 * some devices don't seem to honor this portion
3232 * of the spec. Force a renegotiation of the
3233 * sync component of our transfer agreement even
3234 * if our goal is async. By updating our width
3235 * after forcing the negotiation, we avoid
3236 * renegotiating for width.
3237 */
3238 ahc_update_neg_request(ahc, devinfo, tstate,
3239 tinfo, AHC_NEG_ALWAYS);
3240 ahc_set_width(ahc, devinfo, bus_width,
3241 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3242 /*paused*/TRUE);
3243 if (sending_reply == FALSE && reject == FALSE) {
3244
3245 /*
3246 * We will always have an SDTR to send.
3247 */
3248 ahc->msgout_index = 0;
3249 ahc->msgout_len = 0;
3250 ahc_build_transfer_msg(ahc, devinfo);
3251 ahc->msgout_index = 0;
3252 response = TRUE;
3253 }
3254 done = MSGLOOP_MSGCOMPLETE;
3255 break;
3256 }
3257 case MSG_EXT_PPR:
3258 {
3259 struct ahc_syncrate *syncrate;
3260 u_int period;
3261 u_int offset;
3262 u_int bus_width;
3263 u_int ppr_options;
3264 u_int saved_width;
3265 u_int saved_offset;
3266 u_int saved_ppr_options;
3267
3268 if (ahc->msgin_buf[1] != MSG_EXT_PPR_LEN) {
3269 reject = TRUE;
3270 break;
3271 }
3272
3273 /*
3274 * Wait until we have all args before validating
3275 * and acting on this message.
3276 *
3277 * Add one to MSG_EXT_PPR_LEN to account for
3278 * the extended message preamble.
3279 */
3280 if (ahc->msgin_index < (MSG_EXT_PPR_LEN + 1))
3281 break;
3282
3283 period = ahc->msgin_buf[3];
3284 offset = ahc->msgin_buf[5];
3285 bus_width = ahc->msgin_buf[6];
3286 saved_width = bus_width;
3287 ppr_options = ahc->msgin_buf[7];
3288 /*
3289 * According to the spec, a DT only
3290 * period factor with no DT option
3291 * set implies async.
3292 */
3293 if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0
3294 && period == 9)
3295 offset = 0;
3296 saved_ppr_options = ppr_options;
3297 saved_offset = offset;
3298
3299 /*
3300 * Mask out any options we don't support
3301 * on any controller. Transfer options are
3302 * only available if we are negotiating wide.
3303 */
3304 ppr_options &= MSG_EXT_PPR_DT_REQ;
3305 if (bus_width == 0)
3306 ppr_options = 0;
3307
3308 ahc_validate_width(ahc, tinfo, &bus_width,
3309 devinfo->role);
3310 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period,
3311 &ppr_options,
3312 devinfo->role);
3313 ahc_validate_offset(ahc, tinfo, syncrate,
3314 &offset, bus_width,
3315 devinfo->role);
3316
3317 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, TRUE)) {
3318 /*
3319 * If we are unable to do any of the
3320 * requested options (we went too low),
3321 * then we'll have to reject the message.
3322 */
3323 if (saved_width > bus_width
3324 || saved_offset != offset
3325 || saved_ppr_options != ppr_options) {
3326 reject = TRUE;
3327 period = 0;
3328 offset = 0;
3329 bus_width = 0;
3330 ppr_options = 0;
3331 syncrate = NULL;
3332 }
3333 } else {
3334 if (devinfo->role != ROLE_TARGET)
3335 printf("(%s:%c:%d:%d): Target "
3336 "Initiated PPR\n",
3337 ahc_name(ahc), devinfo->channel,
3338 devinfo->target, devinfo->lun);
3339 else
3340 printf("(%s:%c:%d:%d): Initiator "
3341 "Initiated PPR\n",
3342 ahc_name(ahc), devinfo->channel,
3343 devinfo->target, devinfo->lun);
3344 ahc->msgout_index = 0;
3345 ahc->msgout_len = 0;
3346 ahc_construct_ppr(ahc, devinfo, period, offset,
3347 bus_width, ppr_options);
3348 ahc->msgout_index = 0;
3349 response = TRUE;
3350 }
3351 if (bootverbose) {
3352 printf("(%s:%c:%d:%d): Received PPR width %x, "
3353 "period %x, offset %x,options %x\n"
3354 "\tFiltered to width %x, period %x, "
3355 "offset %x, options %x\n",
3356 ahc_name(ahc), devinfo->channel,
3357 devinfo->target, devinfo->lun,
3358 saved_width, ahc->msgin_buf[3],
3359 saved_offset, saved_ppr_options,
3360 bus_width, period, offset, ppr_options);
3361 }
3362 ahc_set_width(ahc, devinfo, bus_width,
3363 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3364 /*paused*/TRUE);
3365 ahc_set_syncrate(ahc, devinfo,
3366 syncrate, period,
3367 offset, ppr_options,
3368 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3369 /*paused*/TRUE);
3370 done = MSGLOOP_MSGCOMPLETE;
3371 break;
3372 }
3373 default:
3374 /* Unknown extended message. Reject it. */
3375 reject = TRUE;
3376 break;
3377 }
3378 break;
3379 }
3380 #ifdef AHC_TARGET_MODE
3381 case MSG_BUS_DEV_RESET:
3382 ahc_handle_devreset(ahc, devinfo,
3383 CAM_BDR_SENT,
3384 "Bus Device Reset Received",
3385 /*verbose_level*/0);
3386 ahc_restart(ahc);
3387 done = MSGLOOP_TERMINATED;
3388 break;
3389 case MSG_ABORT_TAG:
3390 case MSG_ABORT:
3391 case MSG_CLEAR_QUEUE:
3392 {
3393 int tag;
3394
3395 /* Target mode messages */
3396 if (devinfo->role != ROLE_TARGET) {
3397 reject = TRUE;
3398 break;
3399 }
3400 tag = SCB_LIST_NULL;
3401 if (ahc->msgin_buf[0] == MSG_ABORT_TAG)
3402 tag = ahc_inb(ahc, INITIATOR_TAG);
3403 ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
3404 devinfo->lun, tag, ROLE_TARGET,
3405 CAM_REQ_ABORTED);
3406
3407 tstate = ahc->enabled_targets[devinfo->our_scsiid];
3408 if (tstate != NULL) {
3409 struct ahc_tmode_lstate* lstate;
3410
3411 lstate = tstate->enabled_luns[devinfo->lun];
3412 if (lstate != NULL) {
3413 ahc_queue_lstate_event(ahc, lstate,
3414 devinfo->our_scsiid,
3415 ahc->msgin_buf[0],
3416 /*arg*/tag);
3417 ahc_send_lstate_events(ahc, lstate);
3418 }
3419 }
3420 ahc_restart(ahc);
3421 done = MSGLOOP_TERMINATED;
3422 break;
3423 }
3424 #endif
3425 case MSG_TERM_IO_PROC:
3426 default:
3427 reject = TRUE;
3428 break;
3429 }
3430
3431 if (reject) {
3432 /*
3433 * Setup to reject the message.
3434 */
3435 ahc->msgout_index = 0;
3436 ahc->msgout_len = 1;
3437 ahc->msgout_buf[0] = MSG_MESSAGE_REJECT;
3438 done = MSGLOOP_MSGCOMPLETE;
3439 response = TRUE;
3440 }
3441
3442 if (done != MSGLOOP_IN_PROG && !response)
3443 /* Clear the outgoing message buffer */
3444 ahc->msgout_len = 0;
3445
3446 return (done);
3447 }
3448
3449 /*
3450 * Process a message reject message.
3451 */
3452 static int
ahc_handle_msg_reject(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)3453 ahc_handle_msg_reject(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
3454 {
3455 /*
3456 * What we care about here is if we had an
3457 * outstanding SDTR or WDTR message for this
3458 * target. If we did, this is a signal that
3459 * the target is refusing negotiation.
3460 */
3461 struct scb *scb;
3462 struct ahc_initiator_tinfo *tinfo;
3463 struct ahc_tmode_tstate *tstate;
3464 u_int scb_index;
3465 u_int last_msg;
3466 int response = 0;
3467
3468 scb_index = ahc_inb(ahc, SCB_TAG);
3469 scb = ahc_lookup_scb(ahc, scb_index);
3470 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel,
3471 devinfo->our_scsiid,
3472 devinfo->target, &tstate);
3473 /* Might be necessary */
3474 last_msg = ahc_inb(ahc, LAST_MSG);
3475
3476 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, /*full*/FALSE)) {
3477 /*
3478 * Target does not support the PPR message.
3479 * Attempt to negotiate SPI-2 style.
3480 */
3481 if (bootverbose) {
3482 printf("(%s:%c:%d:%d): PPR Rejected. "
3483 "Trying WDTR/SDTR\n",
3484 ahc_name(ahc), devinfo->channel,
3485 devinfo->target, devinfo->lun);
3486 }
3487 tinfo->goal.ppr_options = 0;
3488 tinfo->curr.transport_version = 2;
3489 tinfo->goal.transport_version = 2;
3490 ahc->msgout_index = 0;
3491 ahc->msgout_len = 0;
3492 ahc_build_transfer_msg(ahc, devinfo);
3493 ahc->msgout_index = 0;
3494 response = 1;
3495 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, /*full*/FALSE)) {
3496
3497 /* note 8bit xfers */
3498 printf("(%s:%c:%d:%d): refuses WIDE negotiation. Using "
3499 "8bit transfers\n", ahc_name(ahc),
3500 devinfo->channel, devinfo->target, devinfo->lun);
3501 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
3502 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3503 /*paused*/TRUE);
3504 /*
3505 * No need to clear the sync rate. If the target
3506 * did not accept the command, our syncrate is
3507 * unaffected. If the target started the negotiation,
3508 * but rejected our response, we already cleared the
3509 * sync rate before sending our WDTR.
3510 */
3511 if (tinfo->goal.offset != tinfo->curr.offset) {
3512
3513 /* Start the sync negotiation */
3514 ahc->msgout_index = 0;
3515 ahc->msgout_len = 0;
3516 ahc_build_transfer_msg(ahc, devinfo);
3517 ahc->msgout_index = 0;
3518 response = 1;
3519 }
3520 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, /*full*/FALSE)) {
3521 /* note asynch xfers and clear flag */
3522 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0,
3523 /*offset*/0, /*ppr_options*/0,
3524 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3525 /*paused*/TRUE);
3526 printf("(%s:%c:%d:%d): refuses synchronous negotiation. "
3527 "Using asynchronous transfers\n",
3528 ahc_name(ahc), devinfo->channel,
3529 devinfo->target, devinfo->lun);
3530 } else if ((scb->hscb->control & MSG_SIMPLE_TASK) != 0) {
3531 int tag_type;
3532 int mask;
3533
3534 tag_type = (scb->hscb->control & MSG_SIMPLE_TASK);
3535
3536 if (tag_type == MSG_SIMPLE_TASK) {
3537 printf("(%s:%c:%d:%d): refuses tagged commands. "
3538 "Performing non-tagged I/O\n", ahc_name(ahc),
3539 devinfo->channel, devinfo->target, devinfo->lun);
3540 ahc_set_tags(ahc, devinfo, AHC_QUEUE_NONE);
3541 mask = ~0x23;
3542 } else {
3543 printf("(%s:%c:%d:%d): refuses %s tagged commands. "
3544 "Performing simple queue tagged I/O only\n",
3545 ahc_name(ahc), devinfo->channel, devinfo->target,
3546 devinfo->lun, tag_type == MSG_ORDERED_TASK
3547 ? "ordered" : "head of queue");
3548 ahc_set_tags(ahc, devinfo, AHC_QUEUE_BASIC);
3549 mask = ~0x03;
3550 }
3551
3552 /*
3553 * Resend the identify for this CCB as the target
3554 * may believe that the selection is invalid otherwise.
3555 */
3556 ahc_outb(ahc, SCB_CONTROL,
3557 ahc_inb(ahc, SCB_CONTROL) & mask);
3558 scb->hscb->control &= mask;
3559 ahc_set_transaction_tag(scb, /*enabled*/FALSE,
3560 /*type*/MSG_SIMPLE_TASK);
3561 ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG);
3562 ahc_assert_atn(ahc);
3563
3564 /*
3565 * This transaction is now at the head of
3566 * the untagged queue for this target.
3567 */
3568 if ((ahc->flags & AHC_SCB_BTT) == 0) {
3569 struct scb_tailq *untagged_q;
3570
3571 untagged_q =
3572 &(ahc->untagged_queues[devinfo->target_offset]);
3573 TAILQ_INSERT_HEAD(untagged_q, scb, links.tqe);
3574 scb->flags |= SCB_UNTAGGEDQ;
3575 }
3576 ahc_busy_tcl(ahc, BUILD_TCL(scb->hscb->scsiid, devinfo->lun),
3577 scb->hscb->tag);
3578
3579 /*
3580 * Requeue all tagged commands for this target
3581 * currently in our possession so they can be
3582 * converted to untagged commands.
3583 */
3584 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb),
3585 SCB_GET_CHANNEL(ahc, scb),
3586 SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL,
3587 ROLE_INITIATOR, CAM_REQUEUE_REQ,
3588 SEARCH_COMPLETE);
3589 } else {
3590 /*
3591 * Otherwise, we ignore it.
3592 */
3593 printf("%s:%c:%d: Message reject for %x -- ignored\n",
3594 ahc_name(ahc), devinfo->channel, devinfo->target,
3595 last_msg);
3596 }
3597 return (response);
3598 }
3599
3600 /*
3601 * Process an ignore wide residue message.
3602 */
3603 static void
ahc_handle_ign_wide_residue(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)3604 ahc_handle_ign_wide_residue(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
3605 {
3606 u_int scb_index;
3607 struct scb *scb;
3608
3609 scb_index = ahc_inb(ahc, SCB_TAG);
3610 scb = ahc_lookup_scb(ahc, scb_index);
3611 /*
3612 * XXX Actually check data direction in the sequencer?
3613 * Perhaps add datadir to some spare bits in the hscb?
3614 */
3615 if ((ahc_inb(ahc, SEQ_FLAGS) & DPHASE) == 0
3616 || ahc_get_transfer_dir(scb) != CAM_DIR_IN) {
3617 /*
3618 * Ignore the message if we haven't
3619 * seen an appropriate data phase yet.
3620 */
3621 } else {
3622 /*
3623 * If the residual occurred on the last
3624 * transfer and the transfer request was
3625 * expected to end on an odd count, do
3626 * nothing. Otherwise, subtract a byte
3627 * and update the residual count accordingly.
3628 */
3629 uint32_t sgptr;
3630
3631 sgptr = ahc_inb(ahc, SCB_RESIDUAL_SGPTR);
3632 if ((sgptr & SG_LIST_NULL) != 0
3633 && (ahc_inb(ahc, SCB_LUN) & SCB_XFERLEN_ODD) != 0) {
3634 /*
3635 * If the residual occurred on the last
3636 * transfer and the transfer request was
3637 * expected to end on an odd count, do
3638 * nothing.
3639 */
3640 } else {
3641 struct ahc_dma_seg *sg;
3642 uint32_t data_cnt;
3643 uint32_t data_addr;
3644 uint32_t sglen;
3645
3646 /* Pull in all of the sgptr */
3647 sgptr = ahc_inl(ahc, SCB_RESIDUAL_SGPTR);
3648 data_cnt = ahc_inl(ahc, SCB_RESIDUAL_DATACNT);
3649
3650 if ((sgptr & SG_LIST_NULL) != 0) {
3651 /*
3652 * The residual data count is not updated
3653 * for the command run to completion case.
3654 * Explicitly zero the count.
3655 */
3656 data_cnt &= ~AHC_SG_LEN_MASK;
3657 }
3658
3659 data_addr = ahc_inl(ahc, SHADDR);
3660
3661 data_cnt += 1;
3662 data_addr -= 1;
3663 sgptr &= SG_PTR_MASK;
3664
3665 sg = ahc_sg_bus_to_virt(scb, sgptr);
3666
3667 /*
3668 * The residual sg ptr points to the next S/G
3669 * to load so we must go back one.
3670 */
3671 sg--;
3672 sglen = aic_le32toh(sg->len) & AHC_SG_LEN_MASK;
3673 if (sg != scb->sg_list
3674 && sglen < (data_cnt & AHC_SG_LEN_MASK)) {
3675
3676 sg--;
3677 sglen = aic_le32toh(sg->len);
3678 /*
3679 * Preserve High Address and SG_LIST bits
3680 * while setting the count to 1.
3681 */
3682 data_cnt = 1 | (sglen & (~AHC_SG_LEN_MASK));
3683 data_addr = aic_le32toh(sg->addr)
3684 + (sglen & AHC_SG_LEN_MASK) - 1;
3685
3686 /*
3687 * Increment sg so it points to the
3688 * "next" sg.
3689 */
3690 sg++;
3691 sgptr = ahc_sg_virt_to_bus(scb, sg);
3692 }
3693 ahc_outl(ahc, SCB_RESIDUAL_SGPTR, sgptr);
3694 ahc_outl(ahc, SCB_RESIDUAL_DATACNT, data_cnt);
3695 /*
3696 * Toggle the "oddness" of the transfer length
3697 * to handle this mid-transfer ignore wide
3698 * residue. This ensures that the oddness is
3699 * correct for subsequent data transfers.
3700 */
3701 ahc_outb(ahc, SCB_LUN,
3702 ahc_inb(ahc, SCB_LUN) ^ SCB_XFERLEN_ODD);
3703 }
3704 }
3705 }
3706
3707
3708 /*
3709 * Reinitialize the data pointers for the active transfer
3710 * based on its current residual.
3711 */
3712 static void
ahc_reinitialize_dataptrs(struct ahc_softc * ahc)3713 ahc_reinitialize_dataptrs(struct ahc_softc *ahc)
3714 {
3715 struct scb *scb;
3716 struct ahc_dma_seg *sg;
3717 u_int scb_index;
3718 uint32_t sgptr;
3719 uint32_t resid;
3720 uint32_t dataptr;
3721
3722 scb_index = ahc_inb(ahc, SCB_TAG);
3723 scb = ahc_lookup_scb(ahc, scb_index);
3724 sgptr = (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24)
3725 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16)
3726 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8)
3727 | ahc_inb(ahc, SCB_RESIDUAL_SGPTR);
3728
3729 sgptr &= SG_PTR_MASK;
3730 sg = ahc_sg_bus_to_virt(scb, sgptr);
3731
3732 /* The residual sg_ptr always points to the next sg */
3733 sg--;
3734
3735 resid = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 2) << 16)
3736 | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 1) << 8)
3737 | ahc_inb(ahc, SCB_RESIDUAL_DATACNT);
3738
3739 dataptr = aic_le32toh(sg->addr)
3740 + (aic_le32toh(sg->len) & AHC_SG_LEN_MASK)
3741 - resid;
3742 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
3743 u_int dscommand1;
3744
3745 dscommand1 = ahc_inb(ahc, DSCOMMAND1);
3746 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0);
3747 ahc_outb(ahc, HADDR,
3748 (aic_le32toh(sg->len) >> 24) & SG_HIGH_ADDR_BITS);
3749 ahc_outb(ahc, DSCOMMAND1, dscommand1);
3750 }
3751 ahc_outb(ahc, HADDR + 3, dataptr >> 24);
3752 ahc_outb(ahc, HADDR + 2, dataptr >> 16);
3753 ahc_outb(ahc, HADDR + 1, dataptr >> 8);
3754 ahc_outb(ahc, HADDR, dataptr);
3755 ahc_outb(ahc, HCNT + 2, resid >> 16);
3756 ahc_outb(ahc, HCNT + 1, resid >> 8);
3757 ahc_outb(ahc, HCNT, resid);
3758 if ((ahc->features & AHC_ULTRA2) == 0) {
3759 ahc_outb(ahc, STCNT + 2, resid >> 16);
3760 ahc_outb(ahc, STCNT + 1, resid >> 8);
3761 ahc_outb(ahc, STCNT, resid);
3762 }
3763 }
3764
3765 /*
3766 * Handle the effects of issuing a bus device reset message.
3767 */
3768 static void
ahc_handle_devreset(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,cam_status status,char * message,int verbose_level)3769 ahc_handle_devreset(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
3770 cam_status status, char *message, int verbose_level)
3771 {
3772 #ifdef AHC_TARGET_MODE
3773 struct ahc_tmode_tstate* tstate;
3774 u_int lun;
3775 #endif
3776 int found;
3777
3778 found = ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
3779 CAM_LUN_WILDCARD, SCB_LIST_NULL, devinfo->role,
3780 status);
3781
3782 #ifdef AHC_TARGET_MODE
3783 /*
3784 * Send an immediate notify ccb to all target mord peripheral
3785 * drivers affected by this action.
3786 */
3787 tstate = ahc->enabled_targets[devinfo->our_scsiid];
3788 if (tstate != NULL) {
3789 for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
3790 struct ahc_tmode_lstate* lstate;
3791
3792 lstate = tstate->enabled_luns[lun];
3793 if (lstate == NULL)
3794 continue;
3795
3796 ahc_queue_lstate_event(ahc, lstate, devinfo->our_scsiid,
3797 MSG_BUS_DEV_RESET, /*arg*/0);
3798 ahc_send_lstate_events(ahc, lstate);
3799 }
3800 }
3801 #endif
3802
3803 /*
3804 * Go back to async/narrow transfers and renegotiate.
3805 */
3806 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
3807 AHC_TRANS_CUR, /*paused*/TRUE);
3808 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL,
3809 /*period*/0, /*offset*/0, /*ppr_options*/0,
3810 AHC_TRANS_CUR, /*paused*/TRUE);
3811
3812 if (status != CAM_SEL_TIMEOUT)
3813 ahc_send_async(ahc, devinfo->channel, devinfo->target,
3814 CAM_LUN_WILDCARD, AC_SENT_BDR, NULL);
3815
3816 if (message != NULL
3817 && (verbose_level <= bootverbose))
3818 printf("%s: %s on %c:%d. %d SCBs aborted\n", ahc_name(ahc),
3819 message, devinfo->channel, devinfo->target, found);
3820 }
3821
3822 #ifdef AHC_TARGET_MODE
3823 static void
ahc_setup_target_msgin(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,struct scb * scb)3824 ahc_setup_target_msgin(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
3825 struct scb *scb)
3826 {
3827
3828 /*
3829 * To facilitate adding multiple messages together,
3830 * each routine should increment the index and len
3831 * variables instead of setting them explicitly.
3832 */
3833 ahc->msgout_index = 0;
3834 ahc->msgout_len = 0;
3835
3836 if (scb != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 0)
3837 ahc_build_transfer_msg(ahc, devinfo);
3838 else
3839 panic("ahc_intr: AWAITING target message with no message");
3840
3841 ahc->msgout_index = 0;
3842 ahc->msg_type = MSG_TYPE_TARGET_MSGIN;
3843 }
3844 #endif
3845
3846 int
ahc_softc_init(struct ahc_softc * ahc)3847 ahc_softc_init(struct ahc_softc *ahc)
3848 {
3849
3850 /* The IRQMS bit is only valid on VL and EISA chips */
3851 if ((ahc->chip & AHC_PCI) == 0)
3852 ahc->unpause = ahc_inb(ahc, HCNTRL) & IRQMS;
3853 else
3854 ahc->unpause = 0;
3855 ahc->pause = ahc->unpause | PAUSE;
3856 /* XXX The shared scb data stuff should be deprecated */
3857 if (ahc->scb_data == NULL) {
3858 ahc->scb_data = malloc(sizeof(*ahc->scb_data), M_DEVBUF,
3859 M_NOWAIT | M_ZERO);
3860 if (ahc->scb_data == NULL)
3861 return (ENOMEM);
3862 }
3863
3864 return (0);
3865 }
3866
3867 void
ahc_softc_insert(struct ahc_softc * ahc)3868 ahc_softc_insert(struct ahc_softc *ahc)
3869 {
3870 struct ahc_softc *list_ahc;
3871
3872 #if AHC_PCI_CONFIG > 0
3873 /*
3874 * Second Function PCI devices need to inherit some
3875 * settings from function 0.
3876 */
3877 if ((ahc->chip & AHC_BUS_MASK) == AHC_PCI
3878 && (ahc->features & AHC_MULTI_FUNC) != 0) {
3879 TAILQ_FOREACH(list_ahc, &ahc_tailq, links) {
3880 ahc_dev_softc_t list_pci;
3881 ahc_dev_softc_t pci;
3882
3883 list_pci = list_ahc->dev_softc;
3884 pci = ahc->dev_softc;
3885 if (ahc_get_pci_slot(list_pci) == ahc_get_pci_slot(pci)
3886 && ahc_get_pci_bus(list_pci) == ahc_get_pci_bus(pci)) {
3887 struct ahc_softc *master;
3888 struct ahc_softc *slave;
3889
3890 if (ahc_get_pci_function(list_pci) == 0) {
3891 master = list_ahc;
3892 slave = ahc;
3893 } else {
3894 master = ahc;
3895 slave = list_ahc;
3896 }
3897 slave->flags &= ~AHC_BIOS_ENABLED;
3898 slave->flags |=
3899 master->flags & AHC_BIOS_ENABLED;
3900 slave->flags &= ~AHC_PRIMARY_CHANNEL;
3901 slave->flags |=
3902 master->flags & AHC_PRIMARY_CHANNEL;
3903 break;
3904 }
3905 }
3906 }
3907 #endif
3908
3909 /*
3910 * Insertion sort into our list of softcs.
3911 */
3912 list_ahc = TAILQ_FIRST(&ahc_tailq);
3913 while (list_ahc != NULL
3914 && ahc_softc_comp(ahc, list_ahc) <= 0)
3915 list_ahc = TAILQ_NEXT(list_ahc, links);
3916 if (list_ahc != NULL)
3917 TAILQ_INSERT_BEFORE(list_ahc, ahc, links);
3918 else
3919 TAILQ_INSERT_TAIL(&ahc_tailq, ahc, links);
3920 ahc->init_level++;
3921 }
3922
3923 void
ahc_set_unit(struct ahc_softc * ahc,int unit)3924 ahc_set_unit(struct ahc_softc *ahc, int unit)
3925 {
3926 ahc->unit = unit;
3927 }
3928
3929 void
ahc_set_name(struct ahc_softc * ahc,char * name)3930 ahc_set_name(struct ahc_softc *ahc, char *name)
3931 {
3932 ahc->name = name;
3933 }
3934
3935 void
ahc_free(struct ahc_softc * ahc)3936 ahc_free(struct ahc_softc *ahc)
3937 {
3938 int i;
3939
3940 switch (ahc->init_level) {
3941 default:
3942 case 2:
3943 ahc_shutdown(ahc);
3944 /* FALLTHROUGH */
3945 case 1:
3946 bus_dmamap_unload(ahc->parent_dmat, ahc->shared_data_dmamap);
3947 bus_dmamap_destroy(ahc->parent_dmat, ahc->shared_data_dmamap);
3948 bus_dmamem_unmap(ahc->parent_dmat, (caddr_t)ahc->qoutfifo, ahc->shared_data_size);
3949 bus_dmamem_free(ahc->parent_dmat, &ahc->shared_data_seg, ahc->shared_data_nseg);
3950 break;
3951 case 0:
3952 break;
3953 }
3954
3955 ahc_fini_scbdata(ahc);
3956 for (i = 0; i < AHC_NUM_TARGETS; i++) {
3957 struct ahc_tmode_tstate *tstate;
3958
3959 tstate = ahc->enabled_targets[i];
3960 if (tstate != NULL) {
3961 #ifdef AHC_TARGET_MODE
3962 int j;
3963
3964 for (j = 0; j < AHC_NUM_LUNS; j++) {
3965 struct ahc_tmode_lstate *lstate;
3966
3967 lstate = tstate->enabled_luns[j];
3968 if (lstate != NULL) {
3969 /*xpt_free_path(lstate->path);*/
3970 free(lstate, M_DEVBUF, sizeof(*lstate));
3971 }
3972 }
3973 #endif
3974 free(tstate, M_DEVBUF, sizeof(*tstate));
3975 }
3976 }
3977 #ifdef AHC_TARGET_MODE
3978 if (ahc->black_hole != NULL) {
3979 /*xpt_free_path(ahc->black_hole->path);*/
3980 free(ahc->black_hole, M_DEVBUF, sizeof(*ahc->black_hole));
3981 }
3982 #endif
3983 if (ahc->seep_config != NULL)
3984 free(ahc->seep_config, M_DEVBUF, sizeof(*ahc->seep_config));
3985 return;
3986 }
3987
3988 void
ahc_shutdown(void * arg)3989 ahc_shutdown(void *arg)
3990 {
3991 struct ahc_softc *ahc;
3992 int i;
3993
3994 ahc = (struct ahc_softc *)arg;
3995
3996 /* This will reset most registers to 0, but not all */
3997 ahc_reset(ahc, /*reinit*/FALSE);
3998 ahc_outb(ahc, SCSISEQ, 0);
3999 ahc_outb(ahc, SXFRCTL0, 0);
4000 ahc_outb(ahc, DSPCISTATUS, 0);
4001
4002 for (i = TARG_SCSIRATE; i < SCSICONF; i++)
4003 ahc_outb(ahc, i, 0);
4004 }
4005
4006 /*
4007 * Reset the controller and record some information about it
4008 * that is only available just after a reset. If "reinit" is
4009 * non-zero, this reset occurred after initial configuration
4010 * and the caller requests that the chip be fully reinitialized
4011 * to a runable state. Chip interrupts are *not* enabled after
4012 * a reinitialization. The caller must enable interrupts via
4013 * ahc_intr_enable().
4014 */
4015 int
ahc_reset(struct ahc_softc * ahc,int reinit)4016 ahc_reset(struct ahc_softc *ahc, int reinit)
4017 {
4018 u_int sblkctl;
4019 u_int sxfrctl1_a, sxfrctl1_b;
4020 int error;
4021 int wait;
4022
4023 /*
4024 * Preserve the value of the SXFRCTL1 register for all channels.
4025 * It contains settings that affect termination and we don't want
4026 * to disturb the integrity of the bus.
4027 */
4028 ahc_pause(ahc);
4029 sxfrctl1_b = 0;
4030 if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7770) {
4031 /*
4032 * Save channel B's settings in case this chip
4033 * is setup for TWIN channel operation.
4034 */
4035 sblkctl = ahc_inb(ahc, SBLKCTL);
4036 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
4037 sxfrctl1_b = ahc_inb(ahc, SXFRCTL1);
4038 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
4039 }
4040 sxfrctl1_a = ahc_inb(ahc, SXFRCTL1);
4041
4042 ahc_outb(ahc, HCNTRL, CHIPRST | ahc->pause);
4043
4044 /*
4045 * Ensure that the reset has finished. We delay 1000us
4046 * prior to reading the register to make sure the chip
4047 * has sufficiently completed its reset to handle register
4048 * accesses.
4049 */
4050 wait = 1000;
4051 do {
4052 aic_delay(1000);
4053 } while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK));
4054
4055 if (wait == 0) {
4056 printf("%s: WARNING - Failed chip reset! "
4057 "Trying to initialize anyway.\n", ahc_name(ahc));
4058 }
4059 ahc_outb(ahc, HCNTRL, ahc->pause);
4060
4061 /* Determine channel configuration */
4062 sblkctl = ahc_inb(ahc, SBLKCTL) & (SELBUSB|SELWIDE);
4063 /* No Twin Channel PCI cards */
4064 if ((ahc->chip & AHC_PCI) != 0)
4065 sblkctl &= ~SELBUSB;
4066 switch (sblkctl) {
4067 case 0:
4068 /* Single Narrow Channel */
4069 break;
4070 case SELWIDE:
4071 /* Wide Channel */
4072 ahc->features |= AHC_WIDE;
4073 break;
4074 case SELBUSB:
4075 /* Twin Channel */
4076 ahc->features |= AHC_TWIN;
4077 break;
4078 default:
4079 printf(" Unsupported adapter type (0x%x). Ignoring\n", sblkctl);
4080 return(-1);
4081 }
4082
4083 /*
4084 * Reload sxfrctl1.
4085 *
4086 * We must always initialize STPWEN to 1 before we
4087 * restore the saved values. STPWEN is initialized
4088 * to a tri-state condition which can only be cleared
4089 * by turning it on.
4090 */
4091 if ((ahc->features & AHC_TWIN) != 0) {
4092 sblkctl = ahc_inb(ahc, SBLKCTL);
4093 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
4094 ahc_outb(ahc, SXFRCTL1, sxfrctl1_b);
4095 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
4096 }
4097 ahc_outb(ahc, SXFRCTL1, sxfrctl1_a);
4098
4099 error = 0;
4100 if (reinit != 0)
4101 /*
4102 * If a recovery action has forced a chip reset,
4103 * re-initialize the chip to our liking.
4104 */
4105 error = ahc->bus_chip_init(ahc);
4106 #ifdef AHC_DUMP_SEQ
4107 else
4108 ahc_dumpseq(ahc);
4109 #endif
4110
4111 return (error);
4112 }
4113
4114 /*
4115 * Determine the number of SCBs available on the controller
4116 */
4117 int
ahc_probe_scbs(struct ahc_softc * ahc)4118 ahc_probe_scbs(struct ahc_softc *ahc) {
4119 int i;
4120
4121 for (i = 0; i < AHC_SCB_MAX; i++) {
4122
4123 ahc_outb(ahc, SCBPTR, i);
4124 ahc_outb(ahc, SCB_BASE, i);
4125 if (ahc_inb(ahc, SCB_BASE) != i)
4126 break;
4127 ahc_outb(ahc, SCBPTR, 0);
4128 if (ahc_inb(ahc, SCB_BASE) != 0)
4129 break;
4130 }
4131 return (i);
4132 }
4133
4134 #if 0
4135 static void
4136 ahc_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
4137 {
4138 bus_addr_t *baddr;
4139
4140 baddr = (bus_addr_t *)arg;
4141 *baddr = segs->ds_addr;
4142 }
4143 #endif
4144
4145 static void
ahc_build_free_scb_list(struct ahc_softc * ahc)4146 ahc_build_free_scb_list(struct ahc_softc *ahc)
4147 {
4148 int scbsize;
4149 int i;
4150
4151 scbsize = 32;
4152 if ((ahc->flags & AHC_LSCBS_ENABLED) != 0)
4153 scbsize = 64;
4154
4155 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
4156 int j;
4157
4158 ahc_outb(ahc, SCBPTR, i);
4159
4160 /*
4161 * Touch all SCB bytes to avoid parity errors
4162 * should one of our debugging routines read
4163 * an otherwise uninitialized byte.
4164 */
4165 for (j = 0; j < scbsize; j++)
4166 ahc_outb(ahc, SCB_BASE+j, 0xFF);
4167
4168 /* Clear the control byte. */
4169 ahc_outb(ahc, SCB_CONTROL, 0);
4170
4171 /* Set the next pointer */
4172 if ((ahc->flags & AHC_PAGESCBS) != 0)
4173 ahc_outb(ahc, SCB_NEXT, i+1);
4174 else
4175 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
4176
4177 /* Make the tag number, SCSIID, and lun invalid */
4178 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
4179 ahc_outb(ahc, SCB_SCSIID, 0xFF);
4180 ahc_outb(ahc, SCB_LUN, 0xFF);
4181 }
4182
4183 if ((ahc->flags & AHC_PAGESCBS) != 0) {
4184 /* SCB 0 heads the free list. */
4185 ahc_outb(ahc, FREE_SCBH, 0);
4186 } else {
4187 /* No free list. */
4188 ahc_outb(ahc, FREE_SCBH, SCB_LIST_NULL);
4189 }
4190
4191 /* Make sure that the last SCB terminates the free list */
4192 ahc_outb(ahc, SCBPTR, i-1);
4193 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
4194 }
4195
4196 static int
ahc_init_scbdata(struct ahc_softc * ahc)4197 ahc_init_scbdata(struct ahc_softc *ahc)
4198 {
4199 struct scb_data *scb_data;
4200 int i;
4201
4202 scb_data = ahc->scb_data;
4203 SLIST_INIT(&scb_data->free_scbs);
4204 SLIST_INIT(&scb_data->sg_maps);
4205
4206 mtx_init(&ahc->sc_scb_mtx, IPL_BIO);
4207 scsi_iopool_init(&ahc->sc_iopool, ahc, ahc_scb_alloc, ahc_scb_free);
4208
4209 /* Allocate SCB resources */
4210 scb_data->scbarray = mallocarray(AHC_SCB_MAX_ALLOC, sizeof(struct scb),
4211 M_DEVBUF, M_NOWAIT | M_ZERO);
4212 if (scb_data->scbarray == NULL)
4213 return (ENOMEM);
4214
4215 /* Determine the number of hardware SCBs and initialize them */
4216
4217 scb_data->maxhscbs = ahc_probe_scbs(ahc);
4218 if (ahc->scb_data->maxhscbs == 0) {
4219 printf("%s: No SCB space found\n", ahc_name(ahc));
4220 return (ENXIO);
4221 }
4222
4223 /*
4224 * Create our DMA tags. These tags define the kinds of device
4225 * accessible memory allocations and memory mappings we will
4226 * need to perform during normal operation.
4227 *
4228 * Unless we need to further restrict the allocation, we rely
4229 * on the restrictions of the parent dmat, hence the common
4230 * use of MAXADDR and MAXSIZE.
4231 */
4232
4233 if (ahc_createdmamem(ahc->parent_dmat,
4234 AHC_SCB_MAX * sizeof(struct hardware_scb), ahc->sc_dmaflags,
4235 &scb_data->hscb_dmamap,
4236 (caddr_t *)&scb_data->hscbs, &scb_data->hscb_busaddr,
4237 &scb_data->hscb_seg, &scb_data->hscb_nseg, ahc_name(ahc),
4238 "hardware SCB structures") < 0)
4239 goto error_exit;
4240
4241 scb_data->init_level++;
4242
4243 if (ahc_createdmamem(ahc->parent_dmat,
4244 AHC_SCB_MAX * sizeof(struct scsi_sense_data), ahc->sc_dmaflags,
4245 &scb_data->sense_dmamap, (caddr_t *)&scb_data->sense,
4246 &scb_data->sense_busaddr, &scb_data->sense_seg,
4247 &scb_data->sense_nseg, ahc_name(ahc), "sense buffers") < 0)
4248 goto error_exit;
4249
4250 scb_data->init_level++;
4251
4252 /* Perform initial CCB allocation */
4253 memset(scb_data->hscbs, 0,
4254 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb));
4255 do {
4256 i = scb_data->numscbs;
4257 ahc_alloc_scbs(ahc);
4258 } while ((i != scb_data->numscbs) &&
4259 (scb_data->numscbs < AHC_SCB_MAX_ALLOC));
4260
4261 if (scb_data->numscbs != AHC_SCB_MAX_ALLOC) {
4262 printf("%s: ahc_init_scbdata - "
4263 "Unable to allocate initial scbs\n",
4264 ahc_name(ahc));
4265 goto error_exit;
4266 }
4267
4268 /*
4269 * Reserve the next queued SCB.
4270 */
4271 ahc->next_queued_scb = scsi_io_get(&ahc->sc_iopool,
4272 SCSI_POLL | SCSI_NOSLEEP);
4273 if (ahc->next_queued_scb != NULL)
4274 /* Note that we were successful */
4275 return (0);
4276
4277 error_exit:
4278
4279 return (ENOMEM);
4280 }
4281
4282 static void
ahc_fini_scbdata(struct ahc_softc * ahc)4283 ahc_fini_scbdata(struct ahc_softc *ahc)
4284 {
4285 struct scb_data *scb_data;
4286
4287 scb_data = ahc->scb_data;
4288 if (scb_data == NULL)
4289 return;
4290
4291 switch (scb_data->init_level) {
4292 default:
4293 case 5:
4294 {
4295 struct sg_map_node *sg_map;
4296
4297 while ((sg_map = SLIST_FIRST(&scb_data->sg_maps))!= NULL) {
4298 SLIST_REMOVE_HEAD(&scb_data->sg_maps, links);
4299 ahc_freedmamem(ahc->parent_dmat, PAGE_SIZE,
4300 sg_map->sg_dmamap, (caddr_t)sg_map->sg_vaddr,
4301 &sg_map->sg_dmasegs, sg_map->sg_nseg);
4302 free(sg_map, M_DEVBUF, sizeof(*sg_map));
4303 }
4304 }
4305 /*FALLTHROUGH*/
4306 case 4:
4307 ahc_freedmamem(ahc->parent_dmat,
4308 AHC_SCB_MAX * sizeof(struct scsi_sense_data),
4309 scb_data->sense_dmamap, (caddr_t)scb_data->sense,
4310 &scb_data->sense_seg, scb_data->sense_nseg);
4311 /*FALLTHROUGH*/
4312 case 3:
4313 ahc_freedmamem(ahc->parent_dmat,
4314 AHC_SCB_MAX * sizeof(struct hardware_scb),
4315 scb_data->hscb_dmamap, (caddr_t)scb_data->hscbs,
4316 &scb_data->hscb_seg, scb_data->hscb_nseg);
4317 /*FALLTHROUGH*/
4318 case 2:
4319 case 1:
4320 case 0:
4321 break;
4322 }
4323 if (scb_data->scbarray != NULL) {
4324 free(scb_data->scbarray, M_DEVBUF,
4325 AHC_SCB_MAX_ALLOC * sizeof(struct scb));
4326 }
4327 }
4328
4329 void
ahc_alloc_scbs(struct ahc_softc * ahc)4330 ahc_alloc_scbs(struct ahc_softc *ahc)
4331 {
4332 struct scb_data *scb_data;
4333 struct scb *next_scb;
4334 struct sg_map_node *sg_map;
4335 bus_addr_t physaddr;
4336 struct ahc_dma_seg *segs;
4337 int newcount;
4338 int i;
4339
4340 scb_data = ahc->scb_data;
4341 if (scb_data->numscbs >= AHC_SCB_MAX_ALLOC)
4342 /* Can't allocate any more */
4343 return;
4344
4345 next_scb = &scb_data->scbarray[scb_data->numscbs];
4346
4347 sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
4348
4349 if (sg_map == NULL)
4350 return;
4351
4352 /* Allocate S/G space for the next batch of SCBS */
4353 if (ahc_createdmamem(ahc->parent_dmat, PAGE_SIZE, ahc->sc_dmaflags,
4354 &sg_map->sg_dmamap,
4355 (caddr_t *)&sg_map->sg_vaddr, &sg_map->sg_physaddr,
4356 &sg_map->sg_dmasegs, &sg_map->sg_nseg, ahc_name(ahc),
4357 "SG space") < 0) {
4358 free(sg_map, M_DEVBUF, sizeof(*sg_map));
4359 return;
4360 }
4361
4362 SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links);
4363
4364 segs = sg_map->sg_vaddr;
4365 physaddr = sg_map->sg_physaddr;
4366
4367 newcount = (PAGE_SIZE / (AHC_NSEG * sizeof(struct ahc_dma_seg)));
4368 newcount = MIN(newcount, (AHC_SCB_MAX_ALLOC - scb_data->numscbs));
4369 for (i = 0; i < newcount; i++) {
4370 int error;
4371
4372 next_scb->sg_map = sg_map;
4373 next_scb->sg_list = segs;
4374 /*
4375 * The sequencer always starts with the second entry.
4376 * The first entry is embedded in the scb.
4377 */
4378 next_scb->sg_list_phys = physaddr + sizeof(struct ahc_dma_seg);
4379 next_scb->ahc_softc = ahc;
4380 next_scb->flags = SCB_FLAG_NONE;
4381
4382 error = bus_dmamap_create(ahc->parent_dmat,
4383 AHC_MAXTRANSFER_SIZE, AHC_NSEG, MAXPHYS, 0,
4384 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW|ahc->sc_dmaflags,
4385 &next_scb->dmamap);
4386 if (error != 0)
4387 break;
4388
4389 next_scb->hscb = &scb_data->hscbs[scb_data->numscbs];
4390 next_scb->hscb->tag = ahc->scb_data->numscbs;
4391 mtx_enter(&ahc->sc_scb_mtx);
4392 SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs,
4393 next_scb, links.sle);
4394 mtx_leave(&ahc->sc_scb_mtx);
4395 segs += AHC_NSEG;
4396 physaddr += (AHC_NSEG * sizeof(struct ahc_dma_seg));
4397 next_scb++;
4398 ahc->scb_data->numscbs++;
4399 }
4400 }
4401
4402 #ifndef DEBUG
4403 void
ahc_controller_info(struct ahc_softc * ahc,char * buf,size_t buf_len)4404 ahc_controller_info(struct ahc_softc *ahc, char *buf, size_t buf_len)
4405 {
4406 int len = 0;
4407
4408 snprintf(buf + len, buf_len - len, "%s: ",
4409 ahc_chip_names[ahc->chip & AHC_CHIPID_MASK]);
4410 len = strlen(buf);
4411 if ((ahc->features & AHC_TWIN) != 0)
4412 snprintf(buf + len, buf_len - len,
4413 "Twin Channel, primary %c, ",
4414 (ahc->flags & AHC_PRIMARY_CHANNEL) + 'A');
4415 else {
4416 const char *speed;
4417 const char *type;
4418
4419 speed = "";
4420 if ((ahc->features & AHC_ULTRA) != 0) {
4421 speed = "Ultra ";
4422 } else if ((ahc->features & AHC_DT) != 0) {
4423 speed = "Ultra160 ";
4424 } else if ((ahc->features & AHC_ULTRA2) != 0) {
4425 speed = "Ultra2 ";
4426 }
4427 if ((ahc->features & AHC_WIDE) != 0) {
4428 type = "Wide";
4429 } else {
4430 type = "Single";
4431 }
4432 snprintf(buf + len, buf_len - len,
4433 "%s%s Channel %c, ",
4434 speed, type, ahc->channel);
4435 }
4436 len = strlen(buf);
4437
4438 if ((ahc->flags & AHC_PAGESCBS) != 0)
4439 snprintf(buf + len, buf_len - len, "%d/%d SCBs",
4440 ahc->scb_data->maxhscbs, AHC_MAX_QUEUE);
4441 else
4442 snprintf(buf + len, buf_len - len, "%d SCBs",
4443 ahc->scb_data->maxhscbs);
4444 }
4445 #endif /* !DEBUG */
4446
4447 int
ahc_chip_init(struct ahc_softc * ahc)4448 ahc_chip_init(struct ahc_softc *ahc)
4449 {
4450 int term;
4451 int error;
4452 u_int i;
4453 u_int scsi_conf;
4454 u_int scsiseq_template;
4455 uint32_t physaddr;
4456
4457 ahc_outb(ahc, SEQ_FLAGS, 0);
4458 ahc_outb(ahc, SEQ_FLAGS2, 0);
4459
4460 /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/
4461 if (ahc->features & AHC_TWIN) {
4462
4463 /*
4464 * Setup Channel B first.
4465 */
4466 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB);
4467 term = (ahc->flags & AHC_TERM_ENB_B) != 0 ? STPWEN : 0;
4468 ahc_outb(ahc, SCSIID, ahc->our_id_b);
4469 scsi_conf = ahc_inb(ahc, SCSICONF + 1);
4470 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
4471 |term|ahc->seltime_b|ENSTIMER|ACTNEGEN);
4472 if ((ahc->features & AHC_ULTRA2) != 0)
4473 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR);
4474 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
4475 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
4476
4477 /* Select Channel A */
4478 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB);
4479 }
4480 term = (ahc->flags & AHC_TERM_ENB_A) != 0 ? STPWEN : 0;
4481 if ((ahc->features & AHC_ULTRA2) != 0)
4482 ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id);
4483 else
4484 ahc_outb(ahc, SCSIID, ahc->our_id);
4485 scsi_conf = ahc_inb(ahc, SCSICONF);
4486 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
4487 |term|ahc->seltime
4488 |ENSTIMER|ACTNEGEN);
4489 if ((ahc->features & AHC_ULTRA2) != 0)
4490 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR);
4491 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
4492 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
4493
4494 /* There are no untagged SCBs active yet. */
4495 for (i = 0; i < 16; i++) {
4496 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, 0));
4497 if ((ahc->flags & AHC_SCB_BTT) != 0) {
4498 int lun;
4499
4500 /*
4501 * The SCB based BTT allows an entry per
4502 * target and lun pair.
4503 */
4504 for (lun = 1; lun < AHC_NUM_LUNS; lun++)
4505 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, lun));
4506 }
4507 }
4508
4509 /* All of our queues are empty */
4510 for (i = 0; i < 256; i++)
4511 ahc->qoutfifo[i] = SCB_LIST_NULL;
4512 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_PREREAD);
4513 for (i = 0; i < 256; i++)
4514 ahc->qinfifo[i] = SCB_LIST_NULL;
4515
4516 if ((ahc->features & AHC_MULTI_TID) != 0) {
4517 ahc_outb(ahc, TARGID, 0);
4518 ahc_outb(ahc, TARGID + 1, 0);
4519 }
4520
4521 /*
4522 * Tell the sequencer where it can find our arrays in memory.
4523 */
4524 physaddr = ahc->scb_data->hscb_busaddr;
4525 ahc_outb(ahc, HSCB_ADDR, physaddr & 0xFF);
4526 ahc_outb(ahc, HSCB_ADDR + 1, (physaddr >> 8) & 0xFF);
4527 ahc_outb(ahc, HSCB_ADDR + 2, (physaddr >> 16) & 0xFF);
4528 ahc_outb(ahc, HSCB_ADDR + 3, (physaddr >> 24) & 0xFF);
4529
4530 physaddr = ahc->shared_data_busaddr;
4531 ahc_outb(ahc, SHARED_DATA_ADDR, physaddr & 0xFF);
4532 ahc_outb(ahc, SHARED_DATA_ADDR + 1, (physaddr >> 8) & 0xFF);
4533 ahc_outb(ahc, SHARED_DATA_ADDR + 2, (physaddr >> 16) & 0xFF);
4534 ahc_outb(ahc, SHARED_DATA_ADDR + 3, (physaddr >> 24) & 0xFF);
4535
4536 /*
4537 * Initialize the group code to command length table.
4538 * This overrides the values in TARG_SCSIRATE, so only
4539 * setup the table after we have processed that information.
4540 */
4541 ahc_outb(ahc, CMDSIZE_TABLE, 5);
4542 ahc_outb(ahc, CMDSIZE_TABLE + 1, 9);
4543 ahc_outb(ahc, CMDSIZE_TABLE + 2, 9);
4544 ahc_outb(ahc, CMDSIZE_TABLE + 3, 0);
4545 ahc_outb(ahc, CMDSIZE_TABLE + 4, 15);
4546 ahc_outb(ahc, CMDSIZE_TABLE + 5, 11);
4547 ahc_outb(ahc, CMDSIZE_TABLE + 6, 0);
4548 ahc_outb(ahc, CMDSIZE_TABLE + 7, 0);
4549
4550 if ((ahc->features & AHC_HS_MAILBOX) != 0)
4551 ahc_outb(ahc, HS_MAILBOX, 0);
4552
4553 /* Tell the sequencer of our initial queue positions */
4554 if ((ahc->features & AHC_TARGETMODE) != 0) {
4555 ahc->tqinfifonext = 1;
4556 ahc_outb(ahc, KERNEL_TQINPOS, ahc->tqinfifonext - 1);
4557 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext);
4558 }
4559 ahc->qinfifonext = 0;
4560 ahc->qoutfifonext = 0;
4561 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
4562 ahc_outb(ahc, QOFF_CTLSTA, SCB_QSIZE_256);
4563 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
4564 ahc_outb(ahc, SNSCB_QOFF, ahc->qinfifonext);
4565 ahc_outb(ahc, SDSCB_QOFF, 0);
4566 } else {
4567 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
4568 ahc_outb(ahc, QINPOS, ahc->qinfifonext);
4569 ahc_outb(ahc, QOUTPOS, ahc->qoutfifonext);
4570 }
4571
4572 /* We don't have any waiting selections */
4573 ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL);
4574
4575 /* Our disconnection list is empty too */
4576 ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL);
4577
4578 /* Message out buffer starts empty */
4579 ahc_outb(ahc, MSG_OUT, MSG_NOOP);
4580
4581 /*
4582 * Setup the allowed SCSI Sequences based on operational mode.
4583 * If we are a target, we'll enable select in operations once
4584 * we've had a lun enabled.
4585 */
4586 scsiseq_template = ENSELO|ENAUTOATNO|ENAUTOATNP;
4587 if ((ahc->flags & AHC_INITIATORROLE) != 0)
4588 scsiseq_template |= ENRSELI;
4589 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq_template);
4590
4591 /* Initialize our list of free SCBs. */
4592 ahc_build_free_scb_list(ahc);
4593
4594 /*
4595 * Tell the sequencer which SCB will be the next one it receives.
4596 */
4597 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag);
4598
4599 /*
4600 * Load the Sequencer program and Enable the adapter
4601 * in "fast" mode.
4602 */
4603 if (bootverbose)
4604 printf("%s: Downloading Sequencer Program...",
4605 ahc_name(ahc));
4606
4607 error = ahc_loadseq(ahc);
4608 if (error != 0)
4609 return (error);
4610
4611 if ((ahc->features & AHC_ULTRA2) != 0) {
4612 int wait;
4613
4614 /*
4615 * Wait for up to 500ms for our transceivers
4616 * to settle. If the adapter does not have
4617 * a cable attached, the transceivers may
4618 * never settle, so don't complain if we
4619 * fail here.
4620 */
4621 for (wait = 5000;
4622 (ahc_inb(ahc, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait;
4623 wait--)
4624 aic_delay(100);
4625 }
4626 ahc_restart(ahc);
4627 return (0);
4628 }
4629
4630 /*
4631 * Start the board, ready for normal operation
4632 */
4633 int
ahc_init(struct ahc_softc * ahc)4634 ahc_init(struct ahc_softc *ahc)
4635 {
4636 int max_targ;
4637 u_int i;
4638 u_int scsi_conf;
4639 u_int ultraenb;
4640 u_int discenable;
4641 u_int tagenable;
4642 size_t driver_data_size;
4643
4644 #ifdef AHC_DEBUG
4645 if ((ahc_debug & AHC_DEBUG_SEQUENCER) != 0)
4646 ahc->flags |= AHC_SEQUENCER_DEBUG;
4647 #endif
4648
4649 #ifdef AHC_PRINT_SRAM
4650 printf("Scratch Ram:");
4651 for (i = 0x20; i < 0x5f; i++) {
4652 if (((i % 8) == 0) && (i != 0)) {
4653 printf ("\n ");
4654 }
4655 printf (" 0x%x", ahc_inb(ahc, i));
4656 }
4657 if ((ahc->features & AHC_MORE_SRAM) != 0) {
4658 for (i = 0x70; i < 0x7f; i++) {
4659 if (((i % 8) == 0) && (i != 0)) {
4660 printf ("\n ");
4661 }
4662 printf (" 0x%x", ahc_inb(ahc, i));
4663 }
4664 }
4665 printf ("\n");
4666 /*
4667 * Reading uninitialized scratch ram may
4668 * generate parity errors.
4669 */
4670 ahc_outb(ahc, CLRINT, CLRPARERR);
4671 ahc_outb(ahc, CLRINT, CLRBRKADRINT);
4672 #endif
4673 max_targ = 15;
4674
4675 /*
4676 * Assume we have a board at this stage and it has been reset.
4677 */
4678 if ((ahc->flags & AHC_USEDEFAULTS) != 0)
4679 ahc->our_id = ahc->our_id_b = 7;
4680
4681 /*
4682 * Default to allowing initiator operations.
4683 */
4684 ahc->flags |= AHC_INITIATORROLE;
4685
4686 /*
4687 * Only allow target mode features if this unit has them enabled.
4688 */
4689 //if ((AHC_TMODE_ENABLE & (0x1 << ahc->unit)) == 0)
4690 ahc->features &= ~AHC_TARGETMODE;
4691
4692 /*
4693 * DMA tag for our command fifos and other data in system memory
4694 * the card's sequencer must be able to access. For initiator
4695 * roles, we need to allocate space for the qinfifo and qoutfifo.
4696 * The qinfifo and qoutfifo are composed of 256 1 byte elements.
4697 * When providing for the target mode role, we must additionally
4698 * provide space for the incoming target command fifo and an extra
4699 * byte to deal with a DMA bug in some chip versions.
4700 */
4701 driver_data_size = 2 * 256 * sizeof(uint8_t);
4702 if ((ahc->features & AHC_TARGETMODE) != 0)
4703 driver_data_size += AHC_TMODE_CMDS * sizeof(struct target_cmd)
4704 + /*DMA WideOdd Bug Buffer*/1;
4705
4706 ahc->init_level++;
4707
4708 if (ahc_createdmamem(ahc->parent_dmat, driver_data_size,
4709 ahc->sc_dmaflags,
4710 &ahc->shared_data_dmamap, (caddr_t *)&ahc->qoutfifo,
4711 &ahc->shared_data_busaddr, &ahc->shared_data_seg,
4712 &ahc->shared_data_nseg, ahc_name(ahc), "shared data") < 0)
4713 return (ENOMEM);
4714
4715 ahc->init_level++;
4716
4717 if ((ahc->features & AHC_TARGETMODE) != 0) {
4718 ahc->targetcmds = (struct target_cmd *)ahc->qoutfifo;
4719 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[AHC_TMODE_CMDS];
4720 ahc->dma_bug_buf = ahc->shared_data_busaddr
4721 + driver_data_size - 1;
4722 /* All target command blocks start out invalid. */
4723 for (i = 0; i < AHC_TMODE_CMDS; i++)
4724 ahc->targetcmds[i].cmd_valid = 0;
4725 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_PREREAD);
4726 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[256];
4727 }
4728 ahc->qinfifo = &ahc->qoutfifo[256];
4729
4730 ahc->init_level++;
4731
4732 /* Allocate SCB data now that buffer_dmat is initialized */
4733 if (ahc->scb_data->maxhscbs == 0)
4734 if (ahc_init_scbdata(ahc) != 0)
4735 return (ENOMEM);
4736
4737 /*
4738 * Allocate a tstate to house information for our
4739 * initiator presence on the bus as well as the user
4740 * data for any target mode initiator.
4741 */
4742 if (ahc_alloc_tstate(ahc, ahc->our_id, 'A') == NULL) {
4743 printf("%s: unable to allocate ahc_tmode_tstate. "
4744 "Failing attach\n", ahc_name(ahc));
4745 return (ENOMEM);
4746 }
4747
4748 if ((ahc->features & AHC_TWIN) != 0) {
4749 if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) {
4750 printf("%s: unable to allocate ahc_tmode_tstate. "
4751 "Failing attach\n", ahc_name(ahc));
4752 return (ENOMEM);
4753 }
4754 }
4755
4756 ahc_outb(ahc, SEQ_FLAGS, 0);
4757 ahc_outb(ahc, SEQ_FLAGS2, 0);
4758
4759 if (ahc->scb_data->maxhscbs < AHC_SCB_MAX_ALLOC) {
4760 ahc->flags |= AHC_PAGESCBS;
4761 } else {
4762 ahc->flags &= ~AHC_PAGESCBS;
4763 }
4764
4765 #ifdef AHC_DEBUG
4766 if (ahc_debug & AHC_SHOW_MISC) {
4767 printf("%s: hardware scb %u bytes; kernel scb %u bytes; "
4768 "ahc_dma %u bytes\n",
4769 ahc_name(ahc),
4770 (u_int)sizeof(struct hardware_scb),
4771 (u_int)sizeof(struct scb),
4772 (u_int)sizeof(struct ahc_dma_seg));
4773 }
4774 #endif /* AHC_DEBUG */
4775
4776 /*
4777 * Look at the information that board initialization or
4778 * the board bios has left us.
4779 */
4780 if (ahc->features & AHC_TWIN) {
4781 scsi_conf = ahc_inb(ahc, SCSICONF + 1);
4782 if ((scsi_conf & RESET_SCSI) != 0
4783 && (ahc->flags & AHC_INITIATORROLE) != 0)
4784 ahc->flags |= AHC_RESET_BUS_B;
4785 }
4786
4787 scsi_conf = ahc_inb(ahc, SCSICONF);
4788 if ((scsi_conf & RESET_SCSI) != 0
4789 && (ahc->flags & AHC_INITIATORROLE) != 0)
4790 ahc->flags |= AHC_RESET_BUS_A;
4791
4792 ultraenb = 0;
4793 tagenable = ALL_TARGETS_MASK;
4794
4795 /* Grab the disconnection disable table and invert it for our needs */
4796 if ((ahc->flags & AHC_USEDEFAULTS) != 0) {
4797 printf("%s: Host Adapter Bios disabled. Using default SCSI "
4798 "device parameters\n", ahc_name(ahc));
4799 ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B|
4800 AHC_TERM_ENB_A|AHC_TERM_ENB_B;
4801 discenable = ALL_TARGETS_MASK;
4802 if ((ahc->features & AHC_ULTRA) != 0)
4803 ultraenb = ALL_TARGETS_MASK;
4804 } else {
4805 discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8)
4806 | ahc_inb(ahc, DISC_DSB));
4807 if ((ahc->features & (AHC_ULTRA|AHC_ULTRA2)) != 0)
4808 ultraenb = (ahc_inb(ahc, ULTRA_ENB + 1) << 8)
4809 | ahc_inb(ahc, ULTRA_ENB);
4810 }
4811
4812 if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
4813 max_targ = 7;
4814
4815 for (i = 0; i <= max_targ; i++) {
4816 struct ahc_initiator_tinfo *tinfo;
4817 struct ahc_tmode_tstate *tstate;
4818 u_int our_id;
4819 u_int target_id;
4820 char channel;
4821
4822 channel = 'A';
4823 our_id = ahc->our_id;
4824 target_id = i;
4825 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
4826 channel = 'B';
4827 our_id = ahc->our_id_b;
4828 target_id = i % 8;
4829 }
4830 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
4831 target_id, &tstate);
4832 /* Default to async narrow across the board */
4833 memset(tinfo, 0, sizeof(*tinfo));
4834 if (ahc->flags & AHC_USEDEFAULTS) {
4835 if ((ahc->features & AHC_WIDE) != 0)
4836 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT;
4837
4838 /*
4839 * These will be truncated when we determine the
4840 * connection type we have with the target.
4841 */
4842 tinfo->user.period = ahc_syncrates->period;
4843 tinfo->user.offset = MAX_OFFSET;
4844 } else {
4845 u_int scsirate;
4846 uint16_t mask;
4847
4848 /* Take the settings leftover in scratch RAM. */
4849 scsirate = ahc_inb(ahc, TARG_SCSIRATE + i);
4850 mask = (0x01 << i);
4851 if ((ahc->features & AHC_ULTRA2) != 0) {
4852 u_int offset;
4853 u_int maxsync;
4854
4855 if ((scsirate & SOFS) == 0x0F) {
4856 /*
4857 * Haven't negotiated yet,
4858 * so the format is different.
4859 */
4860 scsirate = (scsirate & SXFR) >> 4
4861 | (ultraenb & mask)
4862 ? 0x08 : 0x0
4863 | (scsirate & WIDEXFER);
4864 offset = MAX_OFFSET_ULTRA2;
4865 } else
4866 offset = ahc_inb(ahc, TARG_OFFSET + i);
4867 if ((scsirate & ~WIDEXFER) == 0 && offset != 0)
4868 /* Set to the lowest sync rate, 5MHz */
4869 scsirate |= 0x1c;
4870 maxsync = AHC_SYNCRATE_ULTRA2;
4871 if ((ahc->features & AHC_DT) != 0)
4872 maxsync = AHC_SYNCRATE_DT;
4873 tinfo->user.period =
4874 ahc_find_period(ahc, scsirate, maxsync);
4875 if (offset == 0)
4876 tinfo->user.period = 0;
4877 else
4878 tinfo->user.offset = MAX_OFFSET;
4879 if ((scsirate & SXFR_ULTRA2) <= 8/*10MHz*/
4880 && (ahc->features & AHC_DT) != 0)
4881 tinfo->user.ppr_options =
4882 MSG_EXT_PPR_DT_REQ;
4883 } else if ((scsirate & SOFS) != 0) {
4884 if ((scsirate & SXFR) == 0x40
4885 && (ultraenb & mask) != 0) {
4886 /* Treat 10MHz as a non-ultra speed */
4887 scsirate &= ~SXFR;
4888 ultraenb &= ~mask;
4889 }
4890 tinfo->user.period =
4891 ahc_find_period(ahc, scsirate,
4892 (ultraenb & mask)
4893 ? AHC_SYNCRATE_ULTRA
4894 : AHC_SYNCRATE_FAST);
4895 if (tinfo->user.period != 0)
4896 tinfo->user.offset = MAX_OFFSET;
4897 }
4898 if (tinfo->user.period == 0)
4899 tinfo->user.offset = 0;
4900 if ((scsirate & WIDEXFER) != 0
4901 && (ahc->features & AHC_WIDE) != 0)
4902 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT;
4903 tinfo->user.protocol_version = 4;
4904 if ((ahc->features & AHC_DT) != 0)
4905 tinfo->user.transport_version = 3;
4906 else
4907 tinfo->user.transport_version = 2;
4908 tinfo->goal.protocol_version = 2;
4909 tinfo->goal.transport_version = 2;
4910 tinfo->curr.protocol_version = 2;
4911 tinfo->curr.transport_version = 2;
4912 }
4913 tstate->ultraenb = 0;
4914 tstate->discenable = discenable;
4915 }
4916 ahc->user_discenable = discenable;
4917 ahc->user_tagenable = tagenable;
4918
4919 return (ahc->bus_chip_init(ahc));
4920 }
4921
4922 void
ahc_intr_enable(struct ahc_softc * ahc,int enable)4923 ahc_intr_enable(struct ahc_softc *ahc, int enable)
4924 {
4925 u_int hcntrl;
4926
4927 hcntrl = ahc_inb(ahc, HCNTRL);
4928 hcntrl &= ~INTEN;
4929 ahc->pause &= ~INTEN;
4930 ahc->unpause &= ~INTEN;
4931 if (enable) {
4932 hcntrl |= INTEN;
4933 ahc->pause |= INTEN;
4934 ahc->unpause |= INTEN;
4935 }
4936 ahc_outb(ahc, HCNTRL, hcntrl);
4937 }
4938
4939 /************************** Busy Target Table *********************************/
4940 /*
4941 * Return the untagged transaction id for a given target/channel lun.
4942 * Optionally, clear the entry.
4943 */
4944 u_int
ahc_index_busy_tcl(struct ahc_softc * ahc,u_int tcl)4945 ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl)
4946 {
4947 u_int scbid;
4948 u_int target_offset;
4949
4950 if ((ahc->flags & AHC_SCB_BTT) != 0) {
4951 u_int saved_scbptr;
4952
4953 saved_scbptr = ahc_inb(ahc, SCBPTR);
4954 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
4955 scbid = ahc_inb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl));
4956 ahc_outb(ahc, SCBPTR, saved_scbptr);
4957 } else {
4958 target_offset = TCL_TARGET_OFFSET(tcl);
4959 scbid = ahc_inb(ahc, BUSY_TARGETS + target_offset);
4960 }
4961
4962 return (scbid);
4963 }
4964
4965 void
ahc_unbusy_tcl(struct ahc_softc * ahc,u_int tcl)4966 ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl)
4967 {
4968 u_int target_offset;
4969
4970 if ((ahc->flags & AHC_SCB_BTT) != 0) {
4971 u_int saved_scbptr;
4972
4973 saved_scbptr = ahc_inb(ahc, SCBPTR);
4974 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
4975 ahc_outb(ahc, SCB_64_BTT+TCL_TARGET_OFFSET(tcl), SCB_LIST_NULL);
4976 ahc_outb(ahc, SCBPTR, saved_scbptr);
4977 } else {
4978 target_offset = TCL_TARGET_OFFSET(tcl);
4979 ahc_outb(ahc, BUSY_TARGETS + target_offset, SCB_LIST_NULL);
4980 }
4981 }
4982
4983 void
ahc_busy_tcl(struct ahc_softc * ahc,u_int tcl,u_int scbid)4984 ahc_busy_tcl(struct ahc_softc *ahc, u_int tcl, u_int scbid)
4985 {
4986 u_int target_offset;
4987
4988 if ((ahc->flags & AHC_SCB_BTT) != 0) {
4989 u_int saved_scbptr;
4990
4991 saved_scbptr = ahc_inb(ahc, SCBPTR);
4992 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
4993 ahc_outb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl), scbid);
4994 ahc_outb(ahc, SCBPTR, saved_scbptr);
4995 } else {
4996 target_offset = TCL_TARGET_OFFSET(tcl);
4997 ahc_outb(ahc, BUSY_TARGETS + target_offset, scbid);
4998 }
4999 }
5000
5001 /************************** SCB and SCB queue management **********************/
5002 int
ahc_match_scb(struct ahc_softc * ahc,struct scb * scb,int target,char channel,int lun,u_int tag,role_t role)5003 ahc_match_scb(struct ahc_softc *ahc, struct scb *scb, int target,
5004 char channel, int lun, u_int tag, role_t role)
5005 {
5006 char chan;
5007 int targ, slun, match;
5008
5009 if (scb == NULL)
5010 return 0;
5011
5012 targ = SCB_GET_TARGET(ahc, scb);
5013 chan = SCB_GET_CHANNEL(ahc, scb);
5014 slun = SCB_GET_LUN(scb);
5015
5016 match = ((chan == channel) || (channel == ALL_CHANNELS));
5017 if (match != 0)
5018 match = ((targ == target) || (target == CAM_TARGET_WILDCARD));
5019 if (match != 0)
5020 match = ((lun == slun) || (lun == CAM_LUN_WILDCARD));
5021 if (match != 0) {
5022 #ifdef AHC_TARGET_MODE
5023 int group;
5024
5025 group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code);
5026 if (role == ROLE_INITIATOR) {
5027 match = (group != XPT_FC_GROUP_TMODE)
5028 && ((tag == scb->hscb->tag)
5029 || (tag == SCB_LIST_NULL));
5030 } else if (role == ROLE_TARGET) {
5031 match = (group == XPT_FC_GROUP_TMODE)
5032 && ((tag == scb->io_ctx->csio.tag_id)
5033 || (tag == SCB_LIST_NULL));
5034 }
5035 #else /* !AHC_TARGET_MODE */
5036 match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
5037 #endif /* AHC_TARGET_MODE */
5038 }
5039
5040 return match;
5041 }
5042
5043 void
ahc_freeze_devq(struct ahc_softc * ahc,struct scb * scb)5044 ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
5045 {
5046 int target;
5047 char channel;
5048 int lun;
5049
5050 target = SCB_GET_TARGET(ahc, scb);
5051 lun = SCB_GET_LUN(scb);
5052 channel = SCB_GET_CHANNEL(ahc, scb);
5053
5054 ahc_search_qinfifo(ahc, target, channel, lun,
5055 /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN,
5056 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
5057 }
5058
5059 void
ahc_qinfifo_requeue_tail(struct ahc_softc * ahc,struct scb * scb)5060 ahc_qinfifo_requeue_tail(struct ahc_softc *ahc, struct scb *scb)
5061 {
5062 struct scb *prev_scb;
5063
5064 prev_scb = NULL;
5065 if (ahc_qinfifo_count(ahc) != 0) {
5066 u_int prev_tag;
5067 uint8_t prev_pos;
5068
5069 prev_pos = ahc->qinfifonext - 1;
5070 prev_tag = ahc->qinfifo[prev_pos];
5071 prev_scb = ahc_lookup_scb(ahc, prev_tag);
5072 }
5073 ahc_qinfifo_requeue(ahc, prev_scb, scb);
5074 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5075 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
5076 } else {
5077 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
5078 }
5079 }
5080
5081 static void
ahc_qinfifo_requeue(struct ahc_softc * ahc,struct scb * prev_scb,struct scb * scb)5082 ahc_qinfifo_requeue(struct ahc_softc *ahc, struct scb *prev_scb,
5083 struct scb *scb)
5084 {
5085 if (prev_scb == NULL) {
5086 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag);
5087 } else {
5088 prev_scb->hscb->next = scb->hscb->tag;
5089 ahc_sync_scb(ahc, prev_scb,
5090 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
5091 }
5092 ahc->qinfifo[ahc->qinfifonext] = scb->hscb->tag;
5093 ahc_dmamap_sync(ahc, ahc->parent_dmat, ahc->shared_data_dmamap,
5094 /*offset*/ahc->qinfifonext+256, /*len*/1,
5095 BUS_DMASYNC_PREWRITE);
5096 ahc->qinfifonext++;
5097 scb->hscb->next = ahc->next_queued_scb->hscb->tag;
5098 ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
5099 }
5100
5101 static int
ahc_qinfifo_count(struct ahc_softc * ahc)5102 ahc_qinfifo_count(struct ahc_softc *ahc)
5103 {
5104 uint8_t qinpos;
5105 uint8_t diff;
5106
5107 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5108 qinpos = ahc_inb(ahc, SNSCB_QOFF);
5109 ahc_outb(ahc, SNSCB_QOFF, qinpos);
5110 } else
5111 qinpos = ahc_inb(ahc, QINPOS);
5112 diff = ahc->qinfifonext - qinpos;
5113 return (diff);
5114 }
5115
5116 int
ahc_search_qinfifo(struct ahc_softc * ahc,int target,char channel,int lun,u_int tag,role_t role,uint32_t status,ahc_search_action action)5117 ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel,
5118 int lun, u_int tag, role_t role, uint32_t status,
5119 ahc_search_action action)
5120 {
5121 struct scb *scb;
5122 struct scb *prev_scb;
5123 uint8_t qinstart;
5124 uint8_t qinpos;
5125 uint8_t qintail;
5126 uint8_t next;
5127 uint8_t prev;
5128 uint8_t curscbptr;
5129 int found;
5130 int have_qregs;
5131
5132 qintail = ahc->qinfifonext;
5133 have_qregs = (ahc->features & AHC_QUEUE_REGS) != 0;
5134 if (have_qregs) {
5135 qinstart = ahc_inb(ahc, SNSCB_QOFF);
5136 ahc_outb(ahc, SNSCB_QOFF, qinstart);
5137 } else
5138 qinstart = ahc_inb(ahc, QINPOS);
5139 qinpos = qinstart;
5140 found = 0;
5141 prev_scb = NULL;
5142
5143 if (action == SEARCH_COMPLETE) {
5144 /*
5145 * Don't attempt to run any queued untagged transactions
5146 * until we are done with the abort process.
5147 */
5148 ahc_freeze_untagged_queues(ahc);
5149 }
5150
5151 /*
5152 * Start with an empty queue. Entries that are not chosen
5153 * for removal will be re-added to the queue as we go.
5154 */
5155 ahc->qinfifonext = qinpos;
5156 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag);
5157
5158 while (qinpos != qintail) {
5159 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinpos]);
5160 if (scb == NULL) {
5161 printf("qinpos = %d, SCB index = %d\n",
5162 qinpos, ahc->qinfifo[qinpos]);
5163 panic("Loop 1");
5164 }
5165
5166 if (ahc_match_scb(ahc, scb, target, channel, lun, tag, role)) {
5167 /*
5168 * We found an scb that needs to be acted on.
5169 */
5170 found++;
5171 switch (action) {
5172 case SEARCH_COMPLETE:
5173 {
5174 cam_status ostat;
5175 cam_status cstat;
5176
5177 ostat = ahc_get_transaction_status(scb);
5178 if (ostat == CAM_REQ_INPROG)
5179 ahc_set_transaction_status(scb, status);
5180 cstat = ahc_get_transaction_status(scb);
5181 if (cstat != CAM_REQ_CMP)
5182 ahc_freeze_scb(scb);
5183 if ((scb->flags & SCB_ACTIVE) == 0)
5184 printf("Inactive SCB in qinfifo\n");
5185 ahc_done(ahc, scb);
5186
5187 /* FALLTHROUGH */
5188 }
5189 case SEARCH_REMOVE:
5190 break;
5191 case SEARCH_COUNT:
5192 ahc_qinfifo_requeue(ahc, prev_scb, scb);
5193 prev_scb = scb;
5194 break;
5195 }
5196 } else {
5197 ahc_qinfifo_requeue(ahc, prev_scb, scb);
5198 prev_scb = scb;
5199 }
5200 qinpos++;
5201 }
5202
5203 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5204 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
5205 } else {
5206 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
5207 }
5208
5209 if (action != SEARCH_COUNT
5210 && (found != 0)
5211 && (qinstart != ahc->qinfifonext)) {
5212 /*
5213 * The sequencer may be in the process of DMA'ing
5214 * down the SCB at the beginning of the queue.
5215 * This could be problematic if either the first,
5216 * or the second SCB is removed from the queue
5217 * (the first SCB includes a pointer to the "next"
5218 * SCB to DMA). If we have removed any entries, swap
5219 * the first element in the queue with the next HSCB
5220 * so the sequencer will notice that NEXT_QUEUED_SCB
5221 * has changed during its DMA attempt and will retry
5222 * the DMA.
5223 */
5224 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinstart]);
5225
5226 if (scb == NULL) {
5227 printf("found = %d, qinstart = %d, qinfifionext = %d\n",
5228 found, qinstart, ahc->qinfifonext);
5229 panic("First/Second Qinfifo fixup");
5230 }
5231 /*
5232 * ahc_swap_with_next_hscb forces our next pointer to
5233 * point to the reserved SCB for future commands. Save
5234 * and restore our original next pointer to maintain
5235 * queue integrity.
5236 */
5237 next = scb->hscb->next;
5238 ahc->scb_data->scbindex[scb->hscb->tag] = NULL;
5239 ahc_swap_with_next_hscb(ahc, scb);
5240 scb->hscb->next = next;
5241 ahc->qinfifo[qinstart] = scb->hscb->tag;
5242
5243 /* Tell the card about the new head of the qinfifo. */
5244 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag);
5245
5246 /* Fixup the tail "next" pointer. */
5247 qintail = ahc->qinfifonext - 1;
5248 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qintail]);
5249 scb->hscb->next = ahc->next_queued_scb->hscb->tag;
5250 }
5251
5252 /*
5253 * Search waiting for selection list.
5254 */
5255 curscbptr = ahc_inb(ahc, SCBPTR);
5256 next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */
5257 prev = SCB_LIST_NULL;
5258
5259 while (next != SCB_LIST_NULL) {
5260 uint8_t scb_index;
5261
5262 ahc_outb(ahc, SCBPTR, next);
5263 scb_index = ahc_inb(ahc, SCB_TAG);
5264 if (scb_index >= ahc->scb_data->numscbs) {
5265 printf("Waiting List inconsistency. "
5266 "SCB index == %d, yet numscbs == %d.",
5267 scb_index, ahc->scb_data->numscbs);
5268 ahc_dump_card_state(ahc);
5269 panic("for safety");
5270 }
5271 scb = ahc_lookup_scb(ahc, scb_index);
5272 if (scb == NULL) {
5273 printf("scb_index = %d, next = %d\n",
5274 scb_index, next);
5275 panic("Waiting List traversal");
5276 }
5277 if (ahc_match_scb(ahc, scb, target, channel,
5278 lun, SCB_LIST_NULL, role)) {
5279 /*
5280 * We found an scb that needs to be acted on.
5281 */
5282 found++;
5283 switch (action) {
5284 case SEARCH_COMPLETE:
5285 {
5286 cam_status ostat;
5287 cam_status cstat;
5288
5289 ostat = ahc_get_transaction_status(scb);
5290 if (ostat == CAM_REQ_INPROG)
5291 ahc_set_transaction_status(scb, status);
5292 cstat = ahc_get_transaction_status(scb);
5293 if (cstat != CAM_REQ_CMP)
5294 ahc_freeze_scb(scb);
5295 if ((scb->flags & SCB_ACTIVE) == 0)
5296 printf("Inactive SCB in Wait List\n");
5297 ahc_done(ahc, scb);
5298 /* FALLTHROUGH */
5299 }
5300 case SEARCH_REMOVE:
5301 next = ahc_rem_wscb(ahc, next, prev);
5302 break;
5303 case SEARCH_COUNT:
5304 prev = next;
5305 next = ahc_inb(ahc, SCB_NEXT);
5306 break;
5307 }
5308 } else {
5309
5310 prev = next;
5311 next = ahc_inb(ahc, SCB_NEXT);
5312 }
5313 }
5314 ahc_outb(ahc, SCBPTR, curscbptr);
5315
5316 found += ahc_search_untagged_queues(ahc, /*scsi_xfer*/NULL, target,
5317 channel, lun, status, action);
5318
5319 if (action == SEARCH_COMPLETE)
5320 ahc_release_untagged_queues(ahc);
5321 return (found);
5322 }
5323
5324 int
ahc_search_untagged_queues(struct ahc_softc * ahc,struct scsi_xfer * xs,int target,char channel,int lun,uint32_t status,ahc_search_action action)5325 ahc_search_untagged_queues(struct ahc_softc *ahc, struct scsi_xfer *xs,
5326 int target, char channel, int lun, uint32_t status,
5327 ahc_search_action action)
5328 {
5329 struct scb *scb;
5330 int maxtarget;
5331 int found;
5332 int i;
5333
5334 if (action == SEARCH_COMPLETE) {
5335 /*
5336 * Don't attempt to run any queued untagged transactions
5337 * until we are done with the abort process.
5338 */
5339 ahc_freeze_untagged_queues(ahc);
5340 }
5341
5342 found = 0;
5343 i = 0;
5344 if ((ahc->flags & AHC_SCB_BTT) == 0) {
5345
5346 maxtarget = 16;
5347 if (target != CAM_TARGET_WILDCARD) {
5348
5349 i = target;
5350 if (channel == 'B')
5351 i += 8;
5352 maxtarget = i + 1;
5353 }
5354 } else {
5355 maxtarget = 0;
5356 }
5357
5358 for (; i < maxtarget; i++) {
5359 struct scb_tailq *untagged_q;
5360 struct scb *next_scb;
5361
5362 untagged_q = &(ahc->untagged_queues[i]);
5363 next_scb = TAILQ_FIRST(untagged_q);
5364 while (next_scb != NULL) {
5365
5366 scb = next_scb;
5367 next_scb = TAILQ_NEXT(scb, links.tqe);
5368
5369 /*
5370 * The head of the list may be the currently
5371 * active untagged command for a device.
5372 * We're only searching for commands that
5373 * have not been started. A transaction
5374 * marked active but still in the qinfifo
5375 * is removed by the qinfifo scanning code
5376 * above.
5377 */
5378 if ((scb->flags & SCB_ACTIVE) != 0)
5379 continue;
5380
5381 if (ahc_match_scb(ahc, scb, target, channel, lun,
5382 SCB_LIST_NULL, ROLE_INITIATOR) == 0
5383 || (xs != NULL && xs != scb->xs))
5384 continue;
5385
5386 /*
5387 * We found an scb that needs to be acted on.
5388 */
5389 found++;
5390 switch (action) {
5391 case SEARCH_COMPLETE:
5392 {
5393 cam_status ostat;
5394 cam_status cstat;
5395
5396 ostat = ahc_get_transaction_status(scb);
5397 if (ostat == CAM_REQ_INPROG)
5398 ahc_set_transaction_status(scb, status);
5399 cstat = ahc_get_transaction_status(scb);
5400 if (cstat != CAM_REQ_CMP)
5401 ahc_freeze_scb(scb);
5402 ahc_done(ahc, scb);
5403 break;
5404 }
5405 case SEARCH_REMOVE:
5406 scb->flags &= ~SCB_UNTAGGEDQ;
5407 TAILQ_REMOVE(untagged_q, scb, links.tqe);
5408 break;
5409 case SEARCH_COUNT:
5410 break;
5411 }
5412 }
5413 }
5414
5415 if (action == SEARCH_COMPLETE)
5416 ahc_release_untagged_queues(ahc);
5417 return (found);
5418 }
5419
5420 int
ahc_search_disc_list(struct ahc_softc * ahc,int target,char channel,int lun,u_int tag,int stop_on_first,int remove,int save_state)5421 ahc_search_disc_list(struct ahc_softc *ahc, int target, char channel,
5422 int lun, u_int tag, int stop_on_first, int remove,
5423 int save_state)
5424 {
5425 struct scb *scbp;
5426 u_int next;
5427 u_int prev;
5428 u_int count;
5429 u_int active_scb;
5430
5431 count = 0;
5432 next = ahc_inb(ahc, DISCONNECTED_SCBH);
5433 prev = SCB_LIST_NULL;
5434
5435 if (save_state) {
5436 /* restore this when we're done */
5437 active_scb = ahc_inb(ahc, SCBPTR);
5438 } else
5439 /* Silence compiler */
5440 active_scb = SCB_LIST_NULL;
5441
5442 while (next != SCB_LIST_NULL) {
5443 u_int scb_index;
5444
5445 ahc_outb(ahc, SCBPTR, next);
5446 scb_index = ahc_inb(ahc, SCB_TAG);
5447 if (scb_index >= ahc->scb_data->numscbs) {
5448 printf("Disconnected List inconsistency. "
5449 "SCB index == %d, yet numscbs == %d.",
5450 scb_index, ahc->scb_data->numscbs);
5451 ahc_dump_card_state(ahc);
5452 panic("for safety");
5453 }
5454
5455 if (next == prev) {
5456 panic("Disconnected List Loop. "
5457 "cur SCBPTR == %x, prev SCBPTR == %x.",
5458 next, prev);
5459 }
5460 scbp = ahc_lookup_scb(ahc, scb_index);
5461 if (ahc_match_scb(ahc, scbp, target, channel, lun,
5462 tag, ROLE_INITIATOR)) {
5463 count++;
5464 if (remove) {
5465 next =
5466 ahc_rem_scb_from_disc_list(ahc, prev, next);
5467 } else {
5468 prev = next;
5469 next = ahc_inb(ahc, SCB_NEXT);
5470 }
5471 if (stop_on_first)
5472 break;
5473 } else {
5474 prev = next;
5475 next = ahc_inb(ahc, SCB_NEXT);
5476 }
5477 }
5478 if (save_state)
5479 ahc_outb(ahc, SCBPTR, active_scb);
5480 return (count);
5481 }
5482
5483 /*
5484 * Remove an SCB from the on chip list of disconnected transactions.
5485 * This is empty/unused if we are not performing SCB paging.
5486 */
5487 static u_int
ahc_rem_scb_from_disc_list(struct ahc_softc * ahc,u_int prev,u_int scbptr)5488 ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, u_int prev, u_int scbptr)
5489 {
5490 u_int next;
5491
5492 ahc_outb(ahc, SCBPTR, scbptr);
5493 next = ahc_inb(ahc, SCB_NEXT);
5494
5495 ahc_outb(ahc, SCB_CONTROL, 0);
5496
5497 ahc_add_curscb_to_free_list(ahc);
5498
5499 if (prev != SCB_LIST_NULL) {
5500 ahc_outb(ahc, SCBPTR, prev);
5501 ahc_outb(ahc, SCB_NEXT, next);
5502 } else
5503 ahc_outb(ahc, DISCONNECTED_SCBH, next);
5504
5505 return (next);
5506 }
5507
5508 /*
5509 * Add the SCB as selected by SCBPTR onto the on chip list of
5510 * free hardware SCBs. This list is empty/unused if we are not
5511 * performing SCB paging.
5512 */
5513 static void
ahc_add_curscb_to_free_list(struct ahc_softc * ahc)5514 ahc_add_curscb_to_free_list(struct ahc_softc *ahc)
5515 {
5516 /*
5517 * Invalidate the tag so that our abort
5518 * routines don't think it's active.
5519 */
5520 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
5521
5522 if ((ahc->flags & AHC_PAGESCBS) != 0) {
5523 ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH));
5524 ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR));
5525 }
5526 }
5527
5528 /*
5529 * Manipulate the waiting for selection list and return the
5530 * scb that follows the one that we remove.
5531 */
5532 static u_int
ahc_rem_wscb(struct ahc_softc * ahc,u_int scbpos,u_int prev)5533 ahc_rem_wscb(struct ahc_softc *ahc, u_int scbpos, u_int prev)
5534 {
5535 u_int curscb, next;
5536
5537 /*
5538 * Select the SCB we want to abort and
5539 * pull the next pointer out of it.
5540 */
5541 curscb = ahc_inb(ahc, SCBPTR);
5542 ahc_outb(ahc, SCBPTR, scbpos);
5543 next = ahc_inb(ahc, SCB_NEXT);
5544
5545 /* Clear the necessary fields */
5546 ahc_outb(ahc, SCB_CONTROL, 0);
5547
5548 ahc_add_curscb_to_free_list(ahc);
5549
5550 /* update the waiting list */
5551 if (prev == SCB_LIST_NULL) {
5552 /* First in the list */
5553 ahc_outb(ahc, WAITING_SCBH, next);
5554
5555 /*
5556 * Ensure we aren't attempting to perform
5557 * selection for this entry.
5558 */
5559 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
5560 } else {
5561 /*
5562 * Select the scb that pointed to us
5563 * and update its next pointer.
5564 */
5565 ahc_outb(ahc, SCBPTR, prev);
5566 ahc_outb(ahc, SCB_NEXT, next);
5567 }
5568
5569 /*
5570 * Point us back at the original scb position.
5571 */
5572 ahc_outb(ahc, SCBPTR, curscb);
5573 return next;
5574 }
5575
5576 /******************************** Error Handling ******************************/
5577 /*
5578 * Abort all SCBs that match the given description (target/channel/lun/tag),
5579 * setting their status to the passed in status if the status has not already
5580 * been modified from CAM_REQ_INPROG. This routine assumes that the sequencer
5581 * is paused before it is called.
5582 */
5583 int
ahc_abort_scbs(struct ahc_softc * ahc,int target,char channel,int lun,u_int tag,role_t role,uint32_t status)5584 ahc_abort_scbs(struct ahc_softc *ahc, int target, char channel,
5585 int lun, u_int tag, role_t role, uint32_t status)
5586 {
5587 struct scb *scbp;
5588 struct scb *scbp_next;
5589 u_int active_scb;
5590 int i, j;
5591 int maxtarget;
5592 int minlun;
5593 int maxlun;
5594
5595 int found;
5596
5597 /*
5598 * Don't attempt to run any queued untagged transactions
5599 * until we are done with the abort process.
5600 */
5601 ahc_freeze_untagged_queues(ahc);
5602
5603 /* restore this when we're done */
5604 active_scb = ahc_inb(ahc, SCBPTR);
5605
5606 found = ahc_search_qinfifo(ahc, target, channel, lun, SCB_LIST_NULL,
5607 role, CAM_REQUEUE_REQ, SEARCH_COMPLETE);
5608
5609 /*
5610 * Clean out the busy target table for any untagged commands.
5611 */
5612 i = 0;
5613 maxtarget = 16;
5614 if (target != CAM_TARGET_WILDCARD) {
5615 i = target;
5616 if (channel == 'B')
5617 i += 8;
5618 maxtarget = i + 1;
5619 }
5620
5621 if (lun == CAM_LUN_WILDCARD) {
5622
5623 /*
5624 * Unless we are using an SCB based
5625 * busy targets table, there is only
5626 * one table entry for all luns of
5627 * a target.
5628 */
5629 minlun = 0;
5630 maxlun = 1;
5631 if ((ahc->flags & AHC_SCB_BTT) != 0)
5632 maxlun = AHC_NUM_LUNS;
5633 } else {
5634 minlun = lun;
5635 maxlun = lun + 1;
5636 }
5637
5638 if (role != ROLE_TARGET) {
5639 for (;i < maxtarget; i++) {
5640 for (j = minlun;j < maxlun; j++) {
5641 u_int scbid;
5642 u_int tcl;
5643
5644 tcl = BUILD_TCL(i << 4, j);
5645 scbid = ahc_index_busy_tcl(ahc, tcl);
5646 scbp = ahc_lookup_scb(ahc, scbid);
5647 if (scbp == NULL
5648 || ahc_match_scb(ahc, scbp, target, channel,
5649 lun, tag, role) == 0)
5650 continue;
5651 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, j));
5652 }
5653 }
5654
5655 /*
5656 * Go through the disconnected list and remove any entries we
5657 * have queued for completion, 0'ing their control byte too.
5658 * We save the active SCB and restore it ourselves, so there
5659 * is no reason for this search to restore it too.
5660 */
5661 ahc_search_disc_list(ahc, target, channel, lun, tag,
5662 /*stop_on_first*/FALSE, /*remove*/TRUE,
5663 /*save_state*/FALSE);
5664 }
5665
5666 /*
5667 * Go through the hardware SCB array looking for commands that
5668 * were active but not on any list. In some cases, these remnants
5669 * might not still have mappings in the scbindex array (e.g. unexpected
5670 * bus free with the same scb queued for an abort). Don't hold this
5671 * against them.
5672 */
5673 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
5674 u_int scbid;
5675
5676 ahc_outb(ahc, SCBPTR, i);
5677 scbid = ahc_inb(ahc, SCB_TAG);
5678 scbp = ahc_lookup_scb(ahc, scbid);
5679 if ((scbp == NULL && scbid != SCB_LIST_NULL)
5680 || (scbp != NULL
5681 && ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)))
5682 ahc_add_curscb_to_free_list(ahc);
5683 }
5684
5685 /*
5686 * Go through the pending CCB list and look for
5687 * commands for this target that are still active.
5688 * These are other tagged commands that were
5689 * disconnected when the reset occurred.
5690 */
5691 scbp_next = LIST_FIRST(&ahc->pending_scbs);
5692 while (scbp_next != NULL) {
5693 scbp = scbp_next;
5694 scbp_next = LIST_NEXT(scbp, pending_links);
5695 if (ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)) {
5696 cam_status ostat;
5697
5698 ostat = ahc_get_transaction_status(scbp);
5699 if (ostat == CAM_REQ_INPROG)
5700 ahc_set_transaction_status(scbp, status);
5701 if (ahc_get_transaction_status(scbp) != CAM_REQ_CMP)
5702 ahc_freeze_scb(scbp);
5703 if ((scbp->flags & SCB_ACTIVE) == 0)
5704 printf("Inactive SCB on pending list\n");
5705 ahc_done(ahc, scbp);
5706 found++;
5707 }
5708 }
5709 ahc_outb(ahc, SCBPTR, active_scb);
5710 ahc_release_untagged_queues(ahc);
5711 return found;
5712 }
5713
5714 static void
ahc_reset_current_bus(struct ahc_softc * ahc)5715 ahc_reset_current_bus(struct ahc_softc *ahc)
5716 {
5717 uint8_t scsiseq;
5718
5719 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST);
5720 scsiseq = ahc_inb(ahc, SCSISEQ);
5721 ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO);
5722 ahc_flush_device_writes(ahc);
5723 aic_delay(AHC_BUSRESET_DELAY);
5724 /* Turn off the bus reset */
5725 ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO);
5726
5727 ahc_clear_intstat(ahc);
5728
5729 /* Re-enable reset interrupts */
5730 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST);
5731 }
5732
5733 int
ahc_reset_channel(struct ahc_softc * ahc,char channel,int initiate_reset)5734 ahc_reset_channel(struct ahc_softc *ahc, char channel, int initiate_reset)
5735 {
5736 struct ahc_devinfo devinfo;
5737 u_int initiator, target, max_scsiid;
5738 u_int sblkctl;
5739 u_int scsiseq;
5740 u_int simode1;
5741 int found;
5742 int restart_needed;
5743 char cur_channel;
5744
5745 ahc->pending_device = NULL;
5746
5747 ahc_compile_devinfo(&devinfo,
5748 CAM_TARGET_WILDCARD,
5749 CAM_TARGET_WILDCARD,
5750 CAM_LUN_WILDCARD,
5751 channel, ROLE_UNKNOWN);
5752 ahc_pause(ahc);
5753
5754 /* Make sure the sequencer is in a safe location. */
5755 ahc_clear_critical_section(ahc);
5756
5757 /*
5758 * Run our command complete fifos to ensure that we perform
5759 * completion processing on any commands that 'completed'
5760 * before the reset occurred.
5761 */
5762 ahc_run_qoutfifo(ahc);
5763 #ifdef AHC_TARGET_MODE
5764 /*
5765 * XXX - In Twin mode, the tqinfifo may have commands
5766 * for an unaffected channel in it. However, if
5767 * we have run out of ATIO resources to drain that
5768 * queue, we may not get them all out here. Further,
5769 * the blocked transactions for the reset channel
5770 * should just be killed off, irrespective of whether
5771 * we are blocked on ATIO resources. Write a routine
5772 * to compact the tqinfifo appropriately.
5773 */
5774 if ((ahc->flags & AHC_TARGETROLE) != 0) {
5775 ahc_run_tqinfifo(ahc, /*paused*/TRUE);
5776 }
5777 #endif
5778
5779 /*
5780 * Reset the bus if we are initiating this reset
5781 */
5782 sblkctl = ahc_inb(ahc, SBLKCTL);
5783 cur_channel = 'A';
5784 if ((ahc->features & AHC_TWIN) != 0
5785 && ((sblkctl & SELBUSB) != 0))
5786 cur_channel = 'B';
5787 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
5788 if (cur_channel != channel) {
5789 /* Case 1: Command for another bus is active
5790 * Stealthily reset the other bus without
5791 * upsetting the current bus.
5792 */
5793 ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB);
5794 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST);
5795 #ifdef AHC_TARGET_MODE
5796 /*
5797 * Bus resets clear ENSELI, so we cannot
5798 * defer re-enabling bus reset interrupts
5799 * if we are in target mode.
5800 */
5801 if ((ahc->flags & AHC_TARGETROLE) != 0)
5802 simode1 |= ENSCSIRST;
5803 #endif
5804 ahc_outb(ahc, SIMODE1, simode1);
5805 if (initiate_reset)
5806 ahc_reset_current_bus(ahc);
5807 ahc_clear_intstat(ahc);
5808 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP));
5809 ahc_outb(ahc, SBLKCTL, sblkctl);
5810 restart_needed = FALSE;
5811 } else {
5812 /* Case 2: A command from this bus is active or we're idle */
5813 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST);
5814 #ifdef AHC_TARGET_MODE
5815 /*
5816 * Bus resets clear ENSELI, so we cannot
5817 * defer re-enabling bus reset interrupts
5818 * if we are in target mode.
5819 */
5820 if ((ahc->flags & AHC_TARGETROLE) != 0)
5821 simode1 |= ENSCSIRST;
5822 #endif
5823 ahc_outb(ahc, SIMODE1, simode1);
5824 if (initiate_reset)
5825 ahc_reset_current_bus(ahc);
5826 ahc_clear_intstat(ahc);
5827 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP));
5828 restart_needed = TRUE;
5829 }
5830
5831 /*
5832 * Clean up all the state information for the
5833 * pending transactions on this bus.
5834 */
5835 found = ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, channel,
5836 CAM_LUN_WILDCARD, SCB_LIST_NULL,
5837 ROLE_UNKNOWN, CAM_SCSI_BUS_RESET);
5838
5839 max_scsiid = (ahc->features & AHC_WIDE) ? 15 : 7;
5840
5841 #ifdef AHC_TARGET_MODE
5842 /*
5843 * Send an immediate notify ccb to all target more peripheral
5844 * drivers affected by this action.
5845 */
5846 for (target = 0; target <= max_scsiid; target++) {
5847 struct ahc_tmode_tstate* tstate;
5848 u_int lun;
5849
5850 tstate = ahc->enabled_targets[target];
5851 if (tstate == NULL)
5852 continue;
5853 for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
5854 struct ahc_tmode_lstate* lstate;
5855
5856 lstate = tstate->enabled_luns[lun];
5857 if (lstate == NULL)
5858 continue;
5859
5860 ahc_queue_lstate_event(ahc, lstate, CAM_TARGET_WILDCARD,
5861 EVENT_TYPE_BUS_RESET, /*arg*/0);
5862 ahc_send_lstate_events(ahc, lstate);
5863 }
5864 }
5865 #endif
5866 /* Notify the XPT that a bus reset occurred */
5867 ahc_send_async(ahc, devinfo.channel, CAM_TARGET_WILDCARD,
5868 CAM_LUN_WILDCARD, AC_BUS_RESET, NULL);
5869
5870 /*
5871 * Revert to async/narrow transfers until we renegotiate.
5872 */
5873 for (target = 0; target <= max_scsiid; target++) {
5874
5875 if (ahc->enabled_targets[target] == NULL)
5876 continue;
5877 for (initiator = 0; initiator <= max_scsiid; initiator++) {
5878 ahc_compile_devinfo(&devinfo, target, initiator,
5879 CAM_LUN_WILDCARD,
5880 channel, ROLE_UNKNOWN);
5881 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
5882 AHC_TRANS_CUR, /*paused*/TRUE);
5883 ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL,
5884 /*period*/0, /*offset*/0,
5885 /*ppr_options*/0, AHC_TRANS_CUR,
5886 /*paused*/TRUE);
5887 }
5888 }
5889
5890 if (restart_needed)
5891 ahc_restart(ahc);
5892 else
5893 ahc_unpause(ahc);
5894 return found;
5895 }
5896
5897
5898 /***************************** Residual Processing ****************************/
5899 /*
5900 * Calculate the residual for a just completed SCB.
5901 */
5902 void
ahc_calc_residual(struct ahc_softc * ahc,struct scb * scb)5903 ahc_calc_residual(struct ahc_softc *ahc, struct scb *scb)
5904 {
5905 struct hardware_scb *hscb;
5906 struct status_pkt *spkt;
5907 uint32_t sgptr;
5908 uint32_t resid_sgptr;
5909 uint32_t resid;
5910
5911 /*
5912 * 5 cases.
5913 * 1) No residual.
5914 * SG_RESID_VALID clear in sgptr.
5915 * 2) Transferless command
5916 * 3) Never performed any transfers.
5917 * sgptr has SG_FULL_RESID set.
5918 * 4) No residual but target did not
5919 * save data pointers after the
5920 * last transfer, so sgptr was
5921 * never updated.
5922 * 5) We have a partial residual.
5923 * Use residual_sgptr to determine
5924 * where we are.
5925 */
5926
5927 hscb = scb->hscb;
5928 sgptr = aic_le32toh(hscb->sgptr);
5929 if ((sgptr & SG_RESID_VALID) == 0)
5930 /* Case 1 */
5931 return;
5932 sgptr &= ~SG_RESID_VALID;
5933
5934 if ((sgptr & SG_LIST_NULL) != 0)
5935 /* Case 2 */
5936 return;
5937
5938 spkt = &hscb->shared_data.status;
5939 resid_sgptr = aic_le32toh(spkt->residual_sg_ptr);
5940 if ((sgptr & SG_FULL_RESID) != 0) {
5941 /* Case 3 */
5942 resid = ahc_get_transfer_length(scb);
5943 } else if ((resid_sgptr & SG_LIST_NULL) != 0) {
5944 /* Case 4 */
5945 return;
5946 } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) {
5947 panic("Bogus resid sgptr value 0x%x", resid_sgptr);
5948 } else {
5949 struct ahc_dma_seg *sg;
5950
5951 /*
5952 * Remainder of the SG where the transfer
5953 * stopped.
5954 */
5955 resid = aic_le32toh(spkt->residual_datacnt) & AHC_SG_LEN_MASK;
5956 sg = ahc_sg_bus_to_virt(scb, resid_sgptr & SG_PTR_MASK);
5957
5958 /* The residual sg_ptr always points to the next sg */
5959 sg--;
5960
5961 /*
5962 * Add up the contents of all residual
5963 * SG segments that are after the SG where
5964 * the transfer stopped.
5965 */
5966 while ((aic_le32toh(sg->len) & AHC_DMA_LAST_SEG) == 0) {
5967 sg++;
5968 resid += aic_le32toh(sg->len) & AHC_SG_LEN_MASK;
5969 }
5970 }
5971 if ((scb->flags & SCB_SENSE) == 0)
5972 ahc_set_residual(scb, resid);
5973 else
5974 ahc_set_sense_residual(scb, resid);
5975
5976 #ifdef AHC_DEBUG
5977 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
5978 ahc_print_path(ahc, scb);
5979 printf("Handled %sResidual of %d bytes\n",
5980 (scb->flags & SCB_SENSE) ? "Sense " : "", resid);
5981 }
5982 #endif
5983 }
5984
5985 /******************************* Target Mode **********************************/
5986 #ifdef AHC_TARGET_MODE
5987 /*
5988 * Add a target mode event to this lun's queue
5989 */
5990 static void
ahc_queue_lstate_event(struct ahc_softc * ahc,struct ahc_tmode_lstate * lstate,u_int initiator_id,u_int event_type,u_int event_arg)5991 ahc_queue_lstate_event(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate,
5992 u_int initiator_id, u_int event_type, u_int event_arg)
5993 {
5994 struct ahc_tmode_event *event;
5995 int pending;
5996
5997 xpt_freeze_devq(lstate->path, /*count*/1);
5998 if (lstate->event_w_idx >= lstate->event_r_idx)
5999 pending = lstate->event_w_idx - lstate->event_r_idx;
6000 else
6001 pending = AHC_TMODE_EVENT_BUFFER_SIZE + 1
6002 - (lstate->event_r_idx - lstate->event_w_idx);
6003
6004 if (event_type == EVENT_TYPE_BUS_RESET
6005 || event_type == MSG_BUS_DEV_RESET) {
6006 /*
6007 * Any earlier events are irrelevant, so reset our buffer.
6008 * This has the effect of allowing us to deal with reset
6009 * floods (an external device holding down the reset line)
6010 * without losing the event that is really interesting.
6011 */
6012 lstate->event_r_idx = 0;
6013 lstate->event_w_idx = 0;
6014 xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE);
6015 }
6016
6017 if (pending == AHC_TMODE_EVENT_BUFFER_SIZE) {
6018 xpt_print_path(lstate->path);
6019 printf("immediate event %x:%x lost\n",
6020 lstate->event_buffer[lstate->event_r_idx].event_type,
6021 lstate->event_buffer[lstate->event_r_idx].event_arg);
6022 lstate->event_r_idx++;
6023 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6024 lstate->event_r_idx = 0;
6025 xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE);
6026 }
6027
6028 event = &lstate->event_buffer[lstate->event_w_idx];
6029 event->initiator_id = initiator_id;
6030 event->event_type = event_type;
6031 event->event_arg = event_arg;
6032 lstate->event_w_idx++;
6033 if (lstate->event_w_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6034 lstate->event_w_idx = 0;
6035 }
6036
6037 /*
6038 * Send any target mode events queued up waiting
6039 * for immediate notify resources.
6040 */
6041 void
ahc_send_lstate_events(struct ahc_softc * ahc,struct ahc_tmode_lstate * lstate)6042 ahc_send_lstate_events(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate)
6043 {
6044 struct ccb_hdr *ccbh;
6045 struct ccb_immed_notify *inot;
6046
6047 while (lstate->event_r_idx != lstate->event_w_idx
6048 && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) {
6049 struct ahc_tmode_event *event;
6050
6051 event = &lstate->event_buffer[lstate->event_r_idx];
6052 SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle);
6053 inot = (struct ccb_immed_notify *)ccbh;
6054 switch (event->event_type) {
6055 case EVENT_TYPE_BUS_RESET:
6056 ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN;
6057 break;
6058 default:
6059 ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN;
6060 inot->message_args[0] = event->event_type;
6061 inot->message_args[1] = event->event_arg;
6062 break;
6063 }
6064 inot->initiator_id = event->initiator_id;
6065 inot->sense_len = 0;
6066 xpt_done((union ccb *)inot);
6067 lstate->event_r_idx++;
6068 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6069 lstate->event_r_idx = 0;
6070 }
6071 }
6072 #endif
6073
6074 /******************** Sequencer Program Patching/Download *********************/
6075
6076 #ifdef AHC_DUMP_SEQ
6077 void
ahc_dumpseq(struct ahc_softc * ahc)6078 ahc_dumpseq(struct ahc_softc* ahc)
6079 {
6080 int i;
6081
6082 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
6083 ahc_outb(ahc, SEQADDR0, 0);
6084 ahc_outb(ahc, SEQADDR1, 0);
6085 for (i = 0; i < ahc->instruction_ram_size; i++) {
6086 uint8_t ins_bytes[4];
6087
6088 ahc_insb(ahc, SEQRAM, ins_bytes, 4);
6089 printf("0x%08x\n", ins_bytes[0] << 24
6090 | ins_bytes[1] << 16
6091 | ins_bytes[2] << 8
6092 | ins_bytes[3]);
6093 }
6094 }
6095 #endif
6096
6097 static int
ahc_loadseq(struct ahc_softc * ahc)6098 ahc_loadseq(struct ahc_softc *ahc)
6099 {
6100 struct cs cs_table[NUM_CRITICAL_SECTIONS];
6101 u_int begin_set[NUM_CRITICAL_SECTIONS];
6102 u_int end_set[NUM_CRITICAL_SECTIONS];
6103 const struct patch *cur_patch;
6104 u_int cs_count;
6105 u_int cur_cs;
6106 u_int i;
6107 u_int skip_addr;
6108 u_int sg_prefetch_cnt;
6109 int downloaded;
6110 uint8_t download_consts[7];
6111
6112 /*
6113 * Start out with 0 critical sections
6114 * that apply to this firmware load.
6115 */
6116 cs_count = 0;
6117 cur_cs = 0;
6118 memset(begin_set, 0, sizeof(begin_set));
6119 memset(end_set, 0, sizeof(end_set));
6120
6121 /* Setup downloadable constant table */
6122 download_consts[QOUTFIFO_OFFSET] = 0;
6123 if (ahc->targetcmds != NULL)
6124 download_consts[QOUTFIFO_OFFSET] += 32;
6125 download_consts[QINFIFO_OFFSET] = download_consts[QOUTFIFO_OFFSET] + 1;
6126 download_consts[CACHESIZE_MASK] = ahc->pci_cachesize - 1;
6127 download_consts[INVERTED_CACHESIZE_MASK] = ~(ahc->pci_cachesize - 1);
6128 sg_prefetch_cnt = ahc->pci_cachesize;
6129 if (sg_prefetch_cnt < (2 * sizeof(struct ahc_dma_seg)))
6130 sg_prefetch_cnt = 2 * sizeof(struct ahc_dma_seg);
6131 download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt;
6132 download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_cnt - 1);
6133 download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_cnt - 1);
6134
6135 cur_patch = patches;
6136 downloaded = 0;
6137 skip_addr = 0;
6138 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
6139 ahc_outb(ahc, SEQADDR0, 0);
6140 ahc_outb(ahc, SEQADDR1, 0);
6141
6142 for (i = 0; i < sizeof(seqprog)/4; i++) {
6143 if (ahc_check_patch(ahc, &cur_patch, i, &skip_addr) == 0) {
6144 /*
6145 * Don't download this instruction as it
6146 * is in a patch that was removed.
6147 */
6148 continue;
6149 }
6150
6151 if (downloaded == ahc->instruction_ram_size) {
6152 /*
6153 * We're about to exceed the instruction
6154 * storage capacity for this chip. Fail
6155 * the load.
6156 */
6157 printf("\n%s: Program too large for instruction memory "
6158 "size of %d!\n", ahc_name(ahc),
6159 ahc->instruction_ram_size);
6160 return (ENOMEM);
6161 }
6162
6163 /*
6164 * Move through the CS table until we find a CS
6165 * that might apply to this instruction.
6166 */
6167 for (; cur_cs < NUM_CRITICAL_SECTIONS; cur_cs++) {
6168 if (critical_sections[cur_cs].end <= i) {
6169 if (begin_set[cs_count] == TRUE
6170 && end_set[cs_count] == FALSE) {
6171 cs_table[cs_count].end = downloaded;
6172 end_set[cs_count] = TRUE;
6173 cs_count++;
6174 }
6175 continue;
6176 }
6177 if (critical_sections[cur_cs].begin <= i
6178 && begin_set[cs_count] == FALSE) {
6179 cs_table[cs_count].begin = downloaded;
6180 begin_set[cs_count] = TRUE;
6181 }
6182 break;
6183 }
6184 ahc_download_instr(ahc, i, download_consts);
6185 downloaded++;
6186 }
6187
6188 ahc->num_critical_sections = cs_count;
6189 if (cs_count != 0) {
6190 ahc->critical_sections = mallocarray(cs_count,
6191 sizeof(struct cs), M_DEVBUF, M_NOWAIT);
6192 if (ahc->critical_sections == NULL)
6193 panic("ahc_loadseq: Could not malloc");
6194 cs_count *= sizeof(struct cs);
6195
6196 memcpy(ahc->critical_sections, cs_table, cs_count);
6197 }
6198 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE);
6199
6200 if (bootverbose) {
6201 printf(" %d instructions downloaded\n", downloaded);
6202 printf("%s: Features 0x%x, Bugs 0x%x, Flags 0x%x\n",
6203 ahc_name(ahc), ahc->features, ahc->bugs, ahc->flags);
6204 }
6205 return (0);
6206 }
6207
6208 static int
ahc_check_patch(struct ahc_softc * ahc,const struct patch ** start_patch,u_int start_instr,u_int * skip_addr)6209 ahc_check_patch(struct ahc_softc *ahc, const struct patch **start_patch,
6210 u_int start_instr, u_int *skip_addr)
6211 {
6212 const struct patch *cur_patch;
6213 const struct patch *last_patch;
6214 u_int num_patches;
6215
6216 num_patches = sizeof(patches)/sizeof(struct patch);
6217 last_patch = &patches[num_patches];
6218 cur_patch = *start_patch;
6219
6220 while (cur_patch < last_patch && start_instr == cur_patch->begin) {
6221
6222 if (cur_patch->patch_func(ahc) == 0) {
6223
6224 /* Start rejecting code */
6225 *skip_addr = start_instr + cur_patch->skip_instr;
6226 cur_patch += cur_patch->skip_patch;
6227 } else {
6228 /* Accepted this patch. Advance to the next
6229 * one and wait for our instruction pointer to
6230 * hit this point.
6231 */
6232 cur_patch++;
6233 }
6234 }
6235
6236 *start_patch = cur_patch;
6237 if (start_instr < *skip_addr)
6238 /* Still skipping */
6239 return (0);
6240
6241 return (1);
6242 }
6243
6244 static void
ahc_download_instr(struct ahc_softc * ahc,u_int instrptr,uint8_t * dconsts)6245 ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts)
6246 {
6247 union ins_formats instr;
6248 struct ins_format1 *fmt1_ins;
6249 struct ins_format3 *fmt3_ins;
6250 u_int opcode;
6251
6252 /*
6253 * The firmware is always compiled into a little endian format.
6254 */
6255 instr.integer = aic_le32toh(*(uint32_t*)&seqprog[instrptr * 4]);
6256
6257 fmt1_ins = &instr.format1;
6258 fmt3_ins = NULL;
6259
6260 /* Pull the opcode */
6261 opcode = instr.format1.opcode;
6262 switch (opcode) {
6263 case AIC_OP_JMP:
6264 case AIC_OP_JC:
6265 case AIC_OP_JNC:
6266 case AIC_OP_CALL:
6267 case AIC_OP_JNE:
6268 case AIC_OP_JNZ:
6269 case AIC_OP_JE:
6270 case AIC_OP_JZ:
6271 {
6272 const struct patch *cur_patch;
6273 int address_offset;
6274 u_int address;
6275 u_int skip_addr;
6276 u_int i;
6277
6278 fmt3_ins = &instr.format3;
6279 address_offset = 0;
6280 address = fmt3_ins->address;
6281 cur_patch = patches;
6282 skip_addr = 0;
6283
6284 for (i = 0; i < address;) {
6285
6286 ahc_check_patch(ahc, &cur_patch, i, &skip_addr);
6287
6288 if (skip_addr > i) {
6289 int end_addr;
6290
6291 end_addr = MIN(address, skip_addr);
6292 address_offset += end_addr - i;
6293 i = skip_addr;
6294 } else {
6295 i++;
6296 }
6297 }
6298 address -= address_offset;
6299 fmt3_ins->address = address;
6300 /* FALLTHROUGH */
6301 }
6302 case AIC_OP_OR:
6303 case AIC_OP_AND:
6304 case AIC_OP_XOR:
6305 case AIC_OP_ADD:
6306 case AIC_OP_ADC:
6307 case AIC_OP_BMOV:
6308 if (fmt1_ins->parity != 0) {
6309 fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
6310 }
6311 fmt1_ins->parity = 0;
6312 if ((ahc->features & AHC_CMD_CHAN) == 0
6313 && opcode == AIC_OP_BMOV) {
6314 /*
6315 * Block move was added at the same time
6316 * as the command channel. Verify that
6317 * this is only a move of a single element
6318 * and convert the BMOV to a MOV
6319 * (AND with an immediate of FF).
6320 */
6321 if (fmt1_ins->immediate != 1)
6322 panic("%s: BMOV not supported",
6323 ahc_name(ahc));
6324 fmt1_ins->opcode = AIC_OP_AND;
6325 fmt1_ins->immediate = 0xff;
6326 }
6327 /* FALLTHROUGH */
6328 case AIC_OP_ROL:
6329 if ((ahc->features & AHC_ULTRA2) != 0) {
6330 int i, count;
6331
6332 /* Calculate odd parity for the instruction */
6333 for (i = 0, count = 0; i < 31; i++) {
6334 uint32_t mask;
6335
6336 mask = 0x01 << i;
6337 if ((instr.integer & mask) != 0)
6338 count++;
6339 }
6340 if ((count & 0x01) == 0)
6341 instr.format1.parity = 1;
6342 } else {
6343 /* Compress the instruction for older sequencers */
6344 if (fmt3_ins != NULL) {
6345 instr.integer =
6346 fmt3_ins->immediate
6347 | (fmt3_ins->source << 8)
6348 | (fmt3_ins->address << 16)
6349 | (fmt3_ins->opcode << 25);
6350 } else {
6351 instr.integer =
6352 fmt1_ins->immediate
6353 | (fmt1_ins->source << 8)
6354 | (fmt1_ins->destination << 16)
6355 | (fmt1_ins->ret << 24)
6356 | (fmt1_ins->opcode << 25);
6357 }
6358 }
6359 /* The sequencer is a little endian cpu */
6360 instr.integer = aic_htole32(instr.integer);
6361 ahc_outsb(ahc, SEQRAM, instr.bytes, 4);
6362 break;
6363 default:
6364 panic("Unknown opcode encountered in seq program");
6365 break;
6366 }
6367 }
6368
6369 #ifndef SMALL_KERNEL
6370 int
ahc_print_register(ahc_reg_parse_entry_t * table,u_int num_entries,const char * name,u_int address,u_int value,u_int * cur_column,u_int wrap_point)6371 ahc_print_register(ahc_reg_parse_entry_t *table, u_int num_entries,
6372 const char *name, u_int address, u_int value,
6373 u_int *cur_column, u_int wrap_point)
6374 {
6375 u_int printed_mask;
6376 int entry, printed;
6377
6378 if (cur_column != NULL && *cur_column >= wrap_point) {
6379 printf("\n");
6380 *cur_column = 0;
6381 }
6382 printed = printf("%s[0x%x]", name, value);
6383 if (table == NULL) {
6384 printed += printf(" ");
6385 if (cur_column != NULL)
6386 *cur_column += printed;
6387 return (printed);
6388 }
6389
6390 printed_mask = 0;
6391 while (printed_mask != 0xFF) {
6392 for (entry = 0; entry < num_entries; entry++) {
6393 if (((value & table[entry].mask) != table[entry].value)
6394 || ((printed_mask & table[entry].mask) ==
6395 table[entry].mask))
6396 continue;
6397
6398 printed += printf("%s%s",
6399 printed_mask == 0 ? ":(" : "|",
6400 table[entry].name);
6401 printed_mask |= table[entry].mask;
6402
6403 break;
6404 }
6405 if (entry >= num_entries)
6406 break;
6407 }
6408
6409 printed += printf("%s", printed_mask == 0 ? " " : ") ");
6410 if (cur_column != NULL)
6411 *cur_column += printed;
6412
6413 return (printed);
6414 }
6415 #endif
6416
6417 void
ahc_dump_card_state(struct ahc_softc * ahc)6418 ahc_dump_card_state(struct ahc_softc *ahc)
6419 {
6420 #ifndef SMALL_KERNEL
6421 struct scb *scb;
6422 struct scb_tailq *untagged_q;
6423 u_int cur_col;
6424 int paused;
6425 int target;
6426 int maxtarget;
6427 int i;
6428 uint8_t last_phase;
6429 uint8_t qinpos;
6430 uint8_t qintail;
6431 uint8_t qoutpos;
6432 uint8_t scb_index;
6433 uint8_t saved_scbptr;
6434
6435 if (ahc_is_paused(ahc)) {
6436 paused = 1;
6437 } else {
6438 paused = 0;
6439 ahc_pause(ahc);
6440 }
6441
6442 saved_scbptr = ahc_inb(ahc, SCBPTR);
6443 last_phase = ahc_inb(ahc, LASTPHASE);
6444 printf("================== Dump Card State Begins =================\n"
6445 "%s: Dumping Card State %s, at SEQADDR 0x%x\n",
6446 ahc_name(ahc), ahc_lookup_phase_entry(last_phase)->phasemsg,
6447 ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8));
6448 if (paused)
6449 printf("Card was paused\n");
6450 printf("ACCUM = 0x%x, SINDEX = 0x%x, DINDEX = 0x%x, ARG_2 = 0x%x\n",
6451 ahc_inb(ahc, ACCUM), ahc_inb(ahc, SINDEX), ahc_inb(ahc, DINDEX),
6452 ahc_inb(ahc, ARG_2));
6453 printf("HCNT = 0x%x SCBPTR = 0x%x\n", ahc_inb(ahc, HCNT),
6454 ahc_inb(ahc, SCBPTR));
6455 cur_col = 0;
6456 if ((ahc->features & AHC_DT) != 0)
6457 ahc_scsiphase_print(ahc_inb(ahc, SCSIPHASE), &cur_col, 50);
6458 ahc_scsisigi_print(ahc_inb(ahc, SCSISIGI), &cur_col, 50);
6459 ahc_error_print(ahc_inb(ahc, ERROR), &cur_col, 50);
6460 ahc_scsibusl_print(ahc_inb(ahc, SCSIBUSL), &cur_col, 50);
6461 ahc_lastphase_print(ahc_inb(ahc, LASTPHASE), &cur_col, 50);
6462 ahc_scsiseq_print(ahc_inb(ahc, SCSISEQ), &cur_col, 50);
6463 ahc_sblkctl_print(ahc_inb(ahc, SBLKCTL), &cur_col, 50);
6464 ahc_scsirate_print(ahc_inb(ahc, SCSIRATE), &cur_col, 50);
6465 ahc_seqctl_print(ahc_inb(ahc, SEQCTL), &cur_col, 50);
6466 ahc_seq_flags_print(ahc_inb(ahc, SEQ_FLAGS), &cur_col, 50);
6467 ahc_sstat0_print(ahc_inb(ahc, SSTAT0), &cur_col, 50);
6468 ahc_sstat1_print(ahc_inb(ahc, SSTAT1), &cur_col, 50);
6469 ahc_sstat2_print(ahc_inb(ahc, SSTAT2), &cur_col, 50);
6470 ahc_sstat3_print(ahc_inb(ahc, SSTAT3), &cur_col, 50);
6471 ahc_simode0_print(ahc_inb(ahc, SIMODE0), &cur_col, 50);
6472 ahc_simode1_print(ahc_inb(ahc, SIMODE1), &cur_col, 50);
6473 ahc_sxfrctl0_print(ahc_inb(ahc, SXFRCTL0), &cur_col, 50);
6474 ahc_dfcntrl_print(ahc_inb(ahc, DFCNTRL), &cur_col, 50);
6475 ahc_dfstatus_print(ahc_inb(ahc, DFSTATUS), &cur_col, 50);
6476 if (cur_col != 0)
6477 printf("\n");
6478 printf("STACK:");
6479 for (i = 0; i < STACK_SIZE; i++)
6480 printf(" 0x%x", ahc_inb(ahc, STACK)|(ahc_inb(ahc, STACK) << 8));
6481 printf("\nSCB count = %d\n", ahc->scb_data->numscbs);
6482 printf("Kernel NEXTQSCB = %d\n", ahc->next_queued_scb->hscb->tag);
6483 printf("Card NEXTQSCB = %d\n", ahc_inb(ahc, NEXT_QUEUED_SCB));
6484 /* QINFIFO */
6485 printf("QINFIFO entries: ");
6486 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
6487 qinpos = ahc_inb(ahc, SNSCB_QOFF);
6488 ahc_outb(ahc, SNSCB_QOFF, qinpos);
6489 } else
6490 qinpos = ahc_inb(ahc, QINPOS);
6491 qintail = ahc->qinfifonext;
6492 while (qinpos != qintail) {
6493 printf("%d ", ahc->qinfifo[qinpos]);
6494 qinpos++;
6495 }
6496 printf("\n");
6497
6498 printf("Waiting Queue entries: ");
6499 scb_index = ahc_inb(ahc, WAITING_SCBH);
6500 i = 0;
6501 while (scb_index != SCB_LIST_NULL && i++ < 256) {
6502 ahc_outb(ahc, SCBPTR, scb_index);
6503 printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG));
6504 scb_index = ahc_inb(ahc, SCB_NEXT);
6505 }
6506 printf("\n");
6507
6508 printf("Disconnected Queue entries: ");
6509 scb_index = ahc_inb(ahc, DISCONNECTED_SCBH);
6510 i = 0;
6511 while (scb_index != SCB_LIST_NULL && i++ < 256) {
6512 ahc_outb(ahc, SCBPTR, scb_index);
6513 printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG));
6514 scb_index = ahc_inb(ahc, SCB_NEXT);
6515 }
6516 printf("\n");
6517
6518 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD);
6519 printf("QOUTFIFO entries: ");
6520 qoutpos = ahc->qoutfifonext;
6521 i = 0;
6522 while (ahc->qoutfifo[qoutpos] != SCB_LIST_NULL && i++ < 256) {
6523 printf("%d ", ahc->qoutfifo[qoutpos]);
6524 qoutpos++;
6525 }
6526 printf("\n");
6527
6528 printf("Sequencer Free SCB List: ");
6529 scb_index = ahc_inb(ahc, FREE_SCBH);
6530 i = 0;
6531 while (scb_index != SCB_LIST_NULL && i++ < 256) {
6532 ahc_outb(ahc, SCBPTR, scb_index);
6533 printf("%d ", scb_index);
6534 scb_index = ahc_inb(ahc, SCB_NEXT);
6535 }
6536 printf("\n");
6537
6538 printf("Sequencer SCB Info: ");
6539 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
6540 ahc_outb(ahc, SCBPTR, i);
6541 /*cur_col =*/ printf("\n%3d ", i);
6542
6543 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), &cur_col, 60);
6544 ahc_scb_scsiid_print(ahc_inb(ahc, SCB_SCSIID), &cur_col, 60);
6545 ahc_scb_lun_print(ahc_inb(ahc, SCB_LUN), &cur_col, 60);
6546 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60);
6547 }
6548 printf("\n");
6549
6550 printf("Pending list: ");
6551 i = 0;
6552 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
6553 if (i++ > 256)
6554 break;
6555 /*cur_col =*/ printf("\n%3d ", scb->hscb->tag);
6556 ahc_scb_control_print(scb->hscb->control, &cur_col, 60);
6557 ahc_scb_scsiid_print(scb->hscb->scsiid, &cur_col, 60);
6558 ahc_scb_lun_print(scb->hscb->lun, &cur_col, 60);
6559 if ((ahc->flags & AHC_PAGESCBS) == 0) {
6560 ahc_outb(ahc, SCBPTR, scb->hscb->tag);
6561 printf("(");
6562 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL),
6563 &cur_col, 60);
6564 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60);
6565 printf(")");
6566 }
6567 }
6568 printf("\n");
6569
6570 printf("Kernel Free SCB list: ");
6571 i = 0;
6572 mtx_enter(&ahc->sc_scb_mtx);
6573 SLIST_FOREACH(scb, &ahc->scb_data->free_scbs, links.sle) {
6574 if (i++ > 256)
6575 break;
6576 printf("%d ", scb->hscb->tag);
6577 }
6578 printf("\n");
6579 mtx_leave(&ahc->sc_scb_mtx);
6580
6581 maxtarget = (ahc->features & (AHC_WIDE|AHC_TWIN)) ? 15 : 7;
6582 for (target = 0; target <= maxtarget; target++) {
6583 untagged_q = &ahc->untagged_queues[target];
6584 if (TAILQ_FIRST(untagged_q) == NULL)
6585 continue;
6586 printf("Untagged Q(%d): ", target);
6587 i = 0;
6588 TAILQ_FOREACH(scb, untagged_q, links.tqe) {
6589 if (i++ > 256)
6590 break;
6591 printf("%d ", scb->hscb->tag);
6592 }
6593 printf("\n");
6594 }
6595
6596 ahc_platform_dump_card_state(ahc);
6597 printf("\n================= Dump Card State Ends ==================\n");
6598 ahc_outb(ahc, SCBPTR, saved_scbptr);
6599 if (paused == 0)
6600 ahc_unpause(ahc);
6601 #endif
6602 }
6603
6604 /************************* Target Mode ****************************************/
6605 #ifdef AHC_TARGET_MODE
6606 cam_status
ahc_find_tmode_devs(struct ahc_softc * ahc,struct cam_sim * sim,union ccb * ccb,struct ahc_tmode_tstate ** tstate,struct ahc_tmode_lstate ** lstate,int notfound_failure)6607 ahc_find_tmode_devs(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb,
6608 struct ahc_tmode_tstate **tstate,
6609 struct ahc_tmode_lstate **lstate,
6610 int notfound_failure)
6611 {
6612
6613 if ((ahc->features & AHC_TARGETMODE) == 0)
6614 return (CAM_REQ_INVALID);
6615
6616 /*
6617 * Handle the 'black hole' device that sucks up
6618 * requests to unattached luns on enabled targets.
6619 */
6620 if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD
6621 && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) {
6622 *tstate = NULL;
6623 *lstate = ahc->black_hole;
6624 } else {
6625 u_int max_id;
6626
6627 max_id = (ahc->features & AHC_WIDE) ? 15 : 7;
6628 if (ccb->ccb_h.target_id > max_id)
6629 return (CAM_TID_INVALID);
6630
6631 if (ccb->ccb_h.target_lun >= AHC_NUM_LUNS)
6632 return (CAM_LUN_INVALID);
6633
6634 *tstate = ahc->enabled_targets[ccb->ccb_h.target_id];
6635 *lstate = NULL;
6636 if (*tstate != NULL)
6637 *lstate =
6638 (*tstate)->enabled_luns[ccb->ccb_h.target_lun];
6639 }
6640
6641 if (notfound_failure != 0 && *lstate == NULL)
6642 return (CAM_PATH_INVALID);
6643
6644 return (CAM_REQ_CMP);
6645 }
6646
6647 void
ahc_handle_en_lun(struct ahc_softc * ahc,struct cam_sim * sim,union ccb * ccb)6648 ahc_handle_en_lun(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb)
6649 {
6650 struct ahc_tmode_tstate *tstate;
6651 struct ahc_tmode_lstate *lstate;
6652 struct ccb_en_lun *cel;
6653 cam_status status;
6654 u_long s;
6655 u_int target;
6656 u_int lun;
6657 u_int target_mask;
6658 u_int our_id;
6659 int error;
6660 char channel;
6661
6662 status = ahc_find_tmode_devs(ahc, sim, ccb, &tstate, &lstate,
6663 /*notfound_failure*/FALSE);
6664
6665 if (status != CAM_REQ_CMP) {
6666 ccb->ccb_h.status = status;
6667 return;
6668 }
6669
6670 if (cam_sim_bus(sim) == 0)
6671 our_id = ahc->our_id;
6672 else
6673 our_id = ahc->our_id_b;
6674
6675 if (ccb->ccb_h.target_id != our_id) {
6676 /*
6677 * our_id represents our initiator ID, or
6678 * the ID of the first target to have an
6679 * enabled lun in target mode. There are
6680 * two cases that may preclude enabling a
6681 * target id other than our_id.
6682 *
6683 * o our_id is for an active initiator role.
6684 * Since the hardware does not support
6685 * reselections to the initiator role at
6686 * anything other than our_id, and our_id
6687 * is used by the hardware to indicate the
6688 * ID to use for both select-out and
6689 * reselect-out operations, the only target
6690 * ID we can support in this mode is our_id.
6691 *
6692 * o The MULTARGID feature is not available and
6693 * a previous target mode ID has been enabled.
6694 */
6695 if ((ahc->features & AHC_MULTIROLE) != 0) {
6696
6697 if ((ahc->features & AHC_MULTI_TID) != 0
6698 && (ahc->flags & AHC_INITIATORROLE) != 0) {
6699 /*
6700 * Only allow additional targets if
6701 * the initiator role is disabled.
6702 * The hardware cannot handle a re-select-in
6703 * on the initiator id during a re-select-out
6704 * on a different target id.
6705 */
6706 status = CAM_TID_INVALID;
6707 } else if ((ahc->flags & AHC_INITIATORROLE) != 0
6708 || ahc->enabled_luns > 0) {
6709 /*
6710 * Only allow our target id to change
6711 * if the initiator role is not configured
6712 * and there are no enabled luns which
6713 * are attached to the currently registered
6714 * scsi id.
6715 */
6716 status = CAM_TID_INVALID;
6717 }
6718 } else if ((ahc->features & AHC_MULTI_TID) == 0
6719 && ahc->enabled_luns > 0) {
6720
6721 status = CAM_TID_INVALID;
6722 }
6723 }
6724
6725 if (status != CAM_REQ_CMP) {
6726 ccb->ccb_h.status = status;
6727 return;
6728 }
6729
6730 /*
6731 * We now have an id that is valid.
6732 * If we aren't in target mode, switch modes.
6733 */
6734 if ((ahc->flags & AHC_TARGETROLE) == 0
6735 && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) {
6736 u_long s;
6737 ahc_flag saved_flags;
6738
6739 printf("Configuring Target Mode\n");
6740 s = splbio();
6741 if (LIST_FIRST(&ahc->pending_scbs) != NULL) {
6742 ccb->ccb_h.status = CAM_BUSY;
6743 splx(s);
6744 return;
6745 }
6746 saved_flags = ahc->flags;
6747 ahc->flags |= AHC_TARGETROLE;
6748 if ((ahc->features & AHC_MULTIROLE) == 0)
6749 ahc->flags &= ~AHC_INITIATORROLE;
6750 ahc_pause(ahc);
6751 error = ahc_loadseq(ahc);
6752 if (error != 0) {
6753 /*
6754 * Restore original configuration and notify
6755 * the caller that we cannot support target mode.
6756 * Since the adapter started out in this
6757 * configuration, the firmware load will succeed,
6758 * so there is no point in checking ahc_loadseq's
6759 * return value.
6760 */
6761 ahc->flags = saved_flags;
6762 (void)ahc_loadseq(ahc);
6763 ahc_restart(ahc);
6764 splx(s);
6765 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
6766 return;
6767 }
6768 ahc_restart(ahc);
6769 splx(s);
6770 }
6771 cel = &ccb->cel;
6772 target = ccb->ccb_h.target_id;
6773 lun = ccb->ccb_h.target_lun;
6774 channel = SIM_CHANNEL(ahc, sim);
6775 target_mask = 0x01 << target;
6776 if (channel == 'B')
6777 target_mask <<= 8;
6778
6779 if (cel->enable != 0) {
6780 u_int scsiseq;
6781
6782 /* Are we already enabled?? */
6783 if (lstate != NULL) {
6784 xpt_print_path(ccb->ccb_h.path);
6785 printf("Lun already enabled\n");
6786 ccb->ccb_h.status = CAM_LUN_ALRDY_ENA;
6787 return;
6788 }
6789
6790 if (cel->grp6_len != 0
6791 || cel->grp7_len != 0) {
6792 /*
6793 * Don't (yet?) support vendor
6794 * specific commands.
6795 */
6796 ccb->ccb_h.status = CAM_REQ_INVALID;
6797 printf("Non-zero Group Codes\n");
6798 return;
6799 }
6800
6801 /*
6802 * Seems to be okay.
6803 * Setup our data structures.
6804 */
6805 if (target != CAM_TARGET_WILDCARD && tstate == NULL) {
6806 tstate = ahc_alloc_tstate(ahc, target, channel);
6807 if (tstate == NULL) {
6808 xpt_print_path(ccb->ccb_h.path);
6809 printf("Couldn't allocate tstate\n");
6810 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
6811 return;
6812 }
6813 }
6814 lstate = malloc(sizeof(*lstate), M_DEVBUF, M_NOWAIT | M_ZERO);
6815 if (lstate == NULL) {
6816 xpt_print_path(ccb->ccb_h.path);
6817 printf("Couldn't allocate lstate\n");
6818 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
6819 return;
6820 }
6821 status = xpt_create_path(&lstate->path, /*periph*/NULL,
6822 xpt_path_path_id(ccb->ccb_h.path),
6823 xpt_path_target_id(ccb->ccb_h.path),
6824 xpt_path_lun_id(ccb->ccb_h.path));
6825 if (status != CAM_REQ_CMP) {
6826 free(lstate, M_DEVBUF, sizeof(*lstate));
6827 xpt_print_path(ccb->ccb_h.path);
6828 printf("Couldn't allocate path\n");
6829 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
6830 return;
6831 }
6832 SLIST_INIT(&lstate->accept_tios);
6833 SLIST_INIT(&lstate->immed_notifies);
6834 s = splbio();
6835 ahc_pause(ahc);
6836 if (target != CAM_TARGET_WILDCARD) {
6837 tstate->enabled_luns[lun] = lstate;
6838 ahc->enabled_luns++;
6839
6840 if ((ahc->features & AHC_MULTI_TID) != 0) {
6841 u_int targid_mask;
6842
6843 targid_mask = ahc_inb(ahc, TARGID)
6844 | (ahc_inb(ahc, TARGID + 1) << 8);
6845
6846 targid_mask |= target_mask;
6847 ahc_outb(ahc, TARGID, targid_mask);
6848 ahc_outb(ahc, TARGID+1, (targid_mask >> 8));
6849
6850 ahc_update_scsiid(ahc, targid_mask);
6851 } else {
6852 u_int our_id;
6853 char channel;
6854
6855 channel = SIM_CHANNEL(ahc, sim);
6856 our_id = SIM_SCSI_ID(ahc, sim);
6857
6858 /*
6859 * This can only happen if selections
6860 * are not enabled
6861 */
6862 if (target != our_id) {
6863 u_int sblkctl;
6864 char cur_channel;
6865 int swap;
6866
6867 sblkctl = ahc_inb(ahc, SBLKCTL);
6868 cur_channel = (sblkctl & SELBUSB)
6869 ? 'B' : 'A';
6870 if ((ahc->features & AHC_TWIN) == 0)
6871 cur_channel = 'A';
6872 swap = cur_channel != channel;
6873 if (channel == 'A')
6874 ahc->our_id = target;
6875 else
6876 ahc->our_id_b = target;
6877
6878 if (swap)
6879 ahc_outb(ahc, SBLKCTL,
6880 sblkctl ^ SELBUSB);
6881
6882 ahc_outb(ahc, SCSIID, target);
6883
6884 if (swap)
6885 ahc_outb(ahc, SBLKCTL, sblkctl);
6886 }
6887 }
6888 } else
6889 ahc->black_hole = lstate;
6890 /* Allow select-in operations */
6891 if (ahc->black_hole != NULL && ahc->enabled_luns > 0) {
6892 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
6893 scsiseq |= ENSELI;
6894 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq);
6895 scsiseq = ahc_inb(ahc, SCSISEQ);
6896 scsiseq |= ENSELI;
6897 ahc_outb(ahc, SCSISEQ, scsiseq);
6898 }
6899 ahc_unpause(ahc);
6900 splx(s);
6901 ccb->ccb_h.status = CAM_REQ_CMP;
6902 xpt_print_path(ccb->ccb_h.path);
6903 printf("Lun now enabled for target mode\n");
6904 } else {
6905 struct scb *scb;
6906 int i, empty;
6907
6908 if (lstate == NULL) {
6909 ccb->ccb_h.status = CAM_LUN_INVALID;
6910 return;
6911 }
6912
6913 s = splbio();
6914
6915 ccb->ccb_h.status = CAM_REQ_CMP;
6916 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
6917 struct ccb_hdr *ccbh;
6918
6919 ccbh = &scb->io_ctx->ccb_h;
6920 if (ccbh->func_code == XPT_CONT_TARGET_IO
6921 && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){
6922 printf("CTIO pending\n");
6923 ccb->ccb_h.status = CAM_REQ_INVALID;
6924 splx(s);
6925 return;
6926 }
6927 }
6928
6929 if (SLIST_FIRST(&lstate->accept_tios) != NULL) {
6930 printf("ATIOs pending\n");
6931 ccb->ccb_h.status = CAM_REQ_INVALID;
6932 }
6933
6934 if (SLIST_FIRST(&lstate->immed_notifies) != NULL) {
6935 printf("INOTs pending\n");
6936 ccb->ccb_h.status = CAM_REQ_INVALID;
6937 }
6938
6939 if (ccb->ccb_h.status != CAM_REQ_CMP) {
6940 splx(s);
6941 return;
6942 }
6943
6944 xpt_print_path(ccb->ccb_h.path);
6945 printf("Target mode disabled\n");
6946 xpt_free_path(lstate->path);
6947 free(lstate, M_DEVBUF, sizeof(*lstate));
6948
6949 ahc_pause(ahc);
6950 /* Can we clean up the target too? */
6951 if (target != CAM_TARGET_WILDCARD) {
6952 tstate->enabled_luns[lun] = NULL;
6953 ahc->enabled_luns--;
6954 for (empty = 1, i = 0; i < 8; i++)
6955 if (tstate->enabled_luns[i] != NULL) {
6956 empty = 0;
6957 break;
6958 }
6959
6960 if (empty) {
6961 ahc_free_tstate(ahc, target, channel,
6962 /*force*/FALSE);
6963 if (ahc->features & AHC_MULTI_TID) {
6964 u_int targid_mask;
6965
6966 targid_mask = ahc_inb(ahc, TARGID)
6967 | (ahc_inb(ahc, TARGID + 1)
6968 << 8);
6969
6970 targid_mask &= ~target_mask;
6971 ahc_outb(ahc, TARGID, targid_mask);
6972 ahc_outb(ahc, TARGID+1,
6973 (targid_mask >> 8));
6974 ahc_update_scsiid(ahc, targid_mask);
6975 }
6976 }
6977 } else {
6978
6979 ahc->black_hole = NULL;
6980
6981 /*
6982 * We can't allow selections without
6983 * our black hole device.
6984 */
6985 empty = TRUE;
6986 }
6987 if (ahc->enabled_luns == 0) {
6988 /* Disallow select-in */
6989 u_int scsiseq;
6990
6991 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
6992 scsiseq &= ~ENSELI;
6993 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq);
6994 scsiseq = ahc_inb(ahc, SCSISEQ);
6995 scsiseq &= ~ENSELI;
6996 ahc_outb(ahc, SCSISEQ, scsiseq);
6997
6998 if ((ahc->features & AHC_MULTIROLE) == 0) {
6999 printf("Configuring Initiator Mode\n");
7000 ahc->flags &= ~AHC_TARGETROLE;
7001 ahc->flags |= AHC_INITIATORROLE;
7002 /*
7003 * Returning to a configuration that
7004 * fit previously will always succeed.
7005 */
7006 (void)ahc_loadseq(ahc);
7007 ahc_restart(ahc);
7008 /*
7009 * Unpaused. The extra unpause
7010 * that follows is harmless.
7011 */
7012 }
7013 }
7014 ahc_unpause(ahc);
7015 splx(s);
7016 }
7017 }
7018
7019 static void
ahc_update_scsiid(struct ahc_softc * ahc,u_int targid_mask)7020 ahc_update_scsiid(struct ahc_softc *ahc, u_int targid_mask)
7021 {
7022 u_int scsiid_mask;
7023 u_int scsiid;
7024
7025 if ((ahc->features & AHC_MULTI_TID) == 0)
7026 panic("ahc_update_scsiid called on non-multitid unit");
7027
7028 /*
7029 * Since we will rely on the TARGID mask
7030 * for selection enables, ensure that OID
7031 * in SCSIID is not set to some other ID
7032 * that we don't want to allow selections on.
7033 */
7034 if ((ahc->features & AHC_ULTRA2) != 0)
7035 scsiid = ahc_inb(ahc, SCSIID_ULTRA2);
7036 else
7037 scsiid = ahc_inb(ahc, SCSIID);
7038 scsiid_mask = 0x1 << (scsiid & OID);
7039 if ((targid_mask & scsiid_mask) == 0) {
7040 u_int our_id;
7041
7042 /* ffs counts from 1 */
7043 our_id = ffs(targid_mask);
7044 if (our_id == 0)
7045 our_id = ahc->our_id;
7046 else
7047 our_id--;
7048 scsiid &= TID;
7049 scsiid |= our_id;
7050 }
7051 if ((ahc->features & AHC_ULTRA2) != 0)
7052 ahc_outb(ahc, SCSIID_ULTRA2, scsiid);
7053 else
7054 ahc_outb(ahc, SCSIID, scsiid);
7055 }
7056
7057 #ifdef AHC_TARGET_MODE
7058 void
ahc_run_tqinfifo(struct ahc_softc * ahc,int paused)7059 ahc_run_tqinfifo(struct ahc_softc *ahc, int paused)
7060 {
7061 struct target_cmd *cmd;
7062
7063 /*
7064 * If the card supports auto-access pause,
7065 * we can access the card directly regardless
7066 * of whether it is paused or not.
7067 */
7068 if ((ahc->features & AHC_AUTOPAUSE) != 0)
7069 paused = TRUE;
7070
7071 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_POSTREAD);
7072 while ((cmd = &ahc->targetcmds[ahc->tqinfifonext])->cmd_valid != 0) {
7073
7074 /*
7075 * Only advance through the queue if we
7076 * have the resources to process the command.
7077 */
7078 if (ahc_handle_target_cmd(ahc, cmd) != 0)
7079 break;
7080
7081 cmd->cmd_valid = 0;
7082 ahc_dmamap_sync(ahc, ahc->parent_dmat/*shared_data_dmat*/,
7083 ahc->shared_data_dmamap,
7084 ahc_targetcmd_offset(ahc, ahc->tqinfifonext),
7085 sizeof(struct target_cmd),
7086 BUS_DMASYNC_PREREAD);
7087 ahc->tqinfifonext++;
7088
7089 /*
7090 * Lazily update our position in the target mode incoming
7091 * command queue as seen by the sequencer.
7092 */
7093 if ((ahc->tqinfifonext & (HOST_TQINPOS - 1)) == 1) {
7094 if ((ahc->features & AHC_HS_MAILBOX) != 0) {
7095 u_int hs_mailbox;
7096
7097 hs_mailbox = ahc_inb(ahc, HS_MAILBOX);
7098 hs_mailbox &= ~HOST_TQINPOS;
7099 hs_mailbox |= ahc->tqinfifonext & HOST_TQINPOS;
7100 ahc_outb(ahc, HS_MAILBOX, hs_mailbox);
7101 } else {
7102 if (!paused)
7103 ahc_pause(ahc);
7104 ahc_outb(ahc, KERNEL_TQINPOS,
7105 ahc->tqinfifonext & HOST_TQINPOS);
7106 if (!paused)
7107 ahc_unpause(ahc);
7108 }
7109 }
7110 }
7111 }
7112 #endif
7113
7114 static int
ahc_handle_target_cmd(struct ahc_softc * ahc,struct target_cmd * cmd)7115 ahc_handle_target_cmd(struct ahc_softc *ahc, struct target_cmd *cmd)
7116 {
7117 struct ahc_tmode_tstate *tstate;
7118 struct ahc_tmode_lstate *lstate;
7119 struct ccb_accept_tio *atio;
7120 uint8_t *byte;
7121 int initiator;
7122 int target;
7123 int lun;
7124
7125 initiator = SCSIID_TARGET(ahc, cmd->scsiid);
7126 target = SCSIID_OUR_ID(cmd->scsiid);
7127 lun = (cmd->identify & MSG_IDENTIFY_LUNMASK);
7128
7129 byte = cmd->bytes;
7130 tstate = ahc->enabled_targets[target];
7131 lstate = NULL;
7132 if (tstate != NULL)
7133 lstate = tstate->enabled_luns[lun];
7134
7135 /*
7136 * Commands for disabled luns go to the black hole driver.
7137 */
7138 if (lstate == NULL)
7139 lstate = ahc->black_hole;
7140
7141 atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios);
7142 if (atio == NULL) {
7143 ahc->flags |= AHC_TQINFIFO_BLOCKED;
7144 /*
7145 * Wait for more ATIOs from the peripheral driver for this lun.
7146 */
7147 if (bootverbose)
7148 printf("%s: ATIOs exhausted\n", ahc_name(ahc));
7149 return (1);
7150 } else
7151 ahc->flags &= ~AHC_TQINFIFO_BLOCKED;
7152 #if 0
7153 printf("Incoming command from %d for %d:%d%s\n",
7154 initiator, target, lun,
7155 lstate == ahc->black_hole ? "(Black Holed)" : "");
7156 #endif
7157 SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle);
7158
7159 if (lstate == ahc->black_hole) {
7160 /* Fill in the wildcards */
7161 atio->ccb_h.target_id = target;
7162 atio->ccb_h.target_lun = lun;
7163 }
7164
7165 /*
7166 * Package it up and send it off to
7167 * whomever has this lun enabled.
7168 */
7169 atio->sense_len = 0;
7170 atio->init_id = initiator;
7171 if (byte[0] != 0xFF) {
7172 /* Tag was included */
7173 atio->tag_action = *byte++;
7174 atio->tag_id = *byte++;
7175 atio->ccb_h.flags = CAM_TAG_ACTION_VALID;
7176 } else {
7177 atio->ccb_h.flags = 0;
7178 }
7179 byte++;
7180
7181 /* Okay. Now determine the cdb size based on the command code */
7182 switch (*byte >> CMD_GROUP_CODE_SHIFT) {
7183 case 0:
7184 atio->cdb_len = 6;
7185 break;
7186 case 1:
7187 case 2:
7188 atio->cdb_len = 10;
7189 break;
7190 case 4:
7191 atio->cdb_len = 16;
7192 break;
7193 case 5:
7194 atio->cdb_len = 12;
7195 break;
7196 case 3:
7197 default:
7198 /* Only copy the opcode. */
7199 atio->cdb_len = 1;
7200 printf("Reserved or VU command code type encountered\n");
7201 break;
7202 }
7203
7204 memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len);
7205
7206 atio->ccb_h.status |= CAM_CDB_RECVD;
7207
7208 if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) {
7209 /*
7210 * We weren't allowed to disconnect.
7211 * We're hanging on the bus until a
7212 * continue target I/O comes in response
7213 * to this accept tio.
7214 */
7215 #if 0
7216 printf("Received Immediate Command %d:%d:%d - %p\n",
7217 initiator, target, lun, ahc->pending_device);
7218 #endif
7219 ahc->pending_device = lstate;
7220 ahc_freeze_ccb((union ccb *)atio);
7221 atio->ccb_h.flags |= CAM_DIS_DISCONNECT;
7222 }
7223 xpt_done((union ccb*)atio);
7224 return (0);
7225 }
7226 #endif
7227
7228 static int
ahc_createdmamem(bus_dma_tag_t tag,int size,int flags,bus_dmamap_t * mapp,caddr_t * vaddr,bus_addr_t * baddr,bus_dma_segment_t * seg,int * nseg,const char * myname,const char * what)7229 ahc_createdmamem(bus_dma_tag_t tag, int size, int flags, bus_dmamap_t *mapp,
7230 caddr_t *vaddr, bus_addr_t *baddr, bus_dma_segment_t *seg, int *nseg,
7231 const char *myname, const char *what)
7232 {
7233 int error;
7234
7235 if ((error = bus_dmamap_create(tag, size, 1, size, 0,
7236 BUS_DMA_NOWAIT | flags, mapp)) != 0) {
7237 printf("%s: failed to create DMA map for %s, error = %d\n",
7238 myname, what, error);
7239 return (error);
7240 }
7241
7242 if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0,
7243 seg, 1, nseg, BUS_DMA_NOWAIT)) != 0) {
7244 printf("%s: failed to allocate DMA mem for %s, error = %d\n",
7245 myname, what, error);
7246 goto destroy;
7247 }
7248
7249 if ((error = bus_dmamem_map(tag, seg, *nseg, size, vaddr,
7250 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
7251 printf("%s: failed to map DMA mem for %s, error = %d\n",
7252 myname, what, error);
7253 goto free;
7254 }
7255
7256 if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL,
7257 BUS_DMA_NOWAIT)) != 0) {
7258 printf("%s: failed to load DMA map for %s, error = %d\n",
7259 myname, what, error);
7260 goto unmap;
7261 }
7262
7263 *baddr = (*mapp)->dm_segs[0].ds_addr;
7264 return (0);
7265
7266 unmap:
7267 bus_dmamem_unmap(tag, *vaddr, size);
7268 free:
7269 bus_dmamem_free(tag, seg, *nseg);
7270 destroy:
7271 bus_dmamap_destroy(tag, *mapp);
7272
7273 *vaddr = 0;
7274 bzero(seg, sizeof(*seg));
7275 return (error);
7276 }
7277
7278 static void
ahc_freedmamem(bus_dma_tag_t tag,int size,bus_dmamap_t map,caddr_t vaddr,bus_dma_segment_t * seg,int nseg)7279 ahc_freedmamem(bus_dma_tag_t tag, int size, bus_dmamap_t map, caddr_t vaddr,
7280 bus_dma_segment_t *seg, int nseg)
7281 {
7282
7283 bus_dmamap_unload(tag, map);
7284 bus_dmamem_unmap(tag, vaddr, size);
7285 bus_dmamem_free(tag, seg, nseg);
7286 bus_dmamap_destroy(tag, map);
7287 }
7288