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[PATCH] sysctl: remove the proc_dir_entry member for the sysctl tables
[linux-2.6.22.y-op.git] / drivers / scsi / aic7xxx / aic7xxx_core.c
blob50ef785224defd6e79f2d938f7ee5961a6cbbaaa
1 /*
2 * Core routines and tables shareable across OS platforms.
3 *
4 * Copyright (c) 1994-2002 Justin T. Gibbs.
5 * Copyright (c) 2000-2002 Adaptec Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification.
14 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
15 * substantially similar to the "NO WARRANTY" disclaimer below
16 * ("Disclaimer") and any redistribution must be conditioned upon
17 * including a substantially similar Disclaimer requirement for further
18 * binary redistribution.
19 * 3. Neither the names of the above-listed copyright holders nor the names
20 * of any contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * Alternatively, this software may be distributed under the terms of the
24 * GNU General Public License ("GPL") version 2 as published by the Free
25 * Software Foundation.
26 *
27 * NO WARRANTY
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
37 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGES.
39 *
40 * $Id: //depot/aic7xxx/aic7xxx/aic7xxx.c#155 $
41 */
42
43 #ifdef __linux__
44 #include "aic7xxx_osm.h"
45 #include "aic7xxx_inline.h"
46 #include "aicasm/aicasm_insformat.h"
47 #else
48 #include <dev/aic7xxx/aic7xxx_osm.h>
49 #include <dev/aic7xxx/aic7xxx_inline.h>
50 #include <dev/aic7xxx/aicasm/aicasm_insformat.h>
51 #endif
52
53 /***************************** Lookup Tables **********************************/
54 char *ahc_chip_names[] =
55 {
56 "NONE",
57 "aic7770",
58 "aic7850",
59 "aic7855",
60 "aic7859",
61 "aic7860",
62 "aic7870",
63 "aic7880",
64 "aic7895",
65 "aic7895C",
66 "aic7890/91",
67 "aic7896/97",
68 "aic7892",
69 "aic7899"
70 };
71 static const u_int num_chip_names = ARRAY_SIZE(ahc_chip_names);
72
73 /*
74 * Hardware error codes.
75 */
76 struct ahc_hard_error_entry {
77 uint8_t errno;
78 char *errmesg;
79 };
80
81 static struct ahc_hard_error_entry ahc_hard_errors[] = {
82 { ILLHADDR, "Illegal Host Access" },
83 { ILLSADDR, "Illegal Sequencer Address referrenced" },
84 { ILLOPCODE, "Illegal Opcode in sequencer program" },
85 { SQPARERR, "Sequencer Parity Error" },
86 { DPARERR, "Data-path Parity Error" },
87 { MPARERR, "Scratch or SCB Memory Parity Error" },
88 { PCIERRSTAT, "PCI Error detected" },
89 { CIOPARERR, "CIOBUS Parity Error" },
90 };
91 static const u_int num_errors = ARRAY_SIZE(ahc_hard_errors);
92
93 static struct ahc_phase_table_entry ahc_phase_table[] =
94 {
95 { P_DATAOUT, MSG_NOOP, "in Data-out phase" },
96 { P_DATAIN, MSG_INITIATOR_DET_ERR, "in Data-in phase" },
97 { P_DATAOUT_DT, MSG_NOOP, "in DT Data-out phase" },
98 { P_DATAIN_DT, MSG_INITIATOR_DET_ERR, "in DT Data-in phase" },
99 { P_COMMAND, MSG_NOOP, "in Command phase" },
100 { P_MESGOUT, MSG_NOOP, "in Message-out phase" },
101 { P_STATUS, MSG_INITIATOR_DET_ERR, "in Status phase" },
102 { P_MESGIN, MSG_PARITY_ERROR, "in Message-in phase" },
103 { P_BUSFREE, MSG_NOOP, "while idle" },
104 { 0, MSG_NOOP, "in unknown phase" }
105 };
106
107 /*
108 * In most cases we only wish to itterate over real phases, so
109 * exclude the last element from the count.
110 */
111 static const u_int num_phases = ARRAY_SIZE(ahc_phase_table) - 1;
112
113 /*
114 * Valid SCSIRATE values. (p. 3-17)
115 * Provides a mapping of tranfer periods in ns to the proper value to
116 * stick in the scsixfer reg.
117 */
118 static struct ahc_syncrate ahc_syncrates[] =
119 {
120 /* ultra2 fast/ultra period rate */
121 { 0x42, 0x000, 9, "80.0" },
122 { 0x03, 0x000, 10, "40.0" },
123 { 0x04, 0x000, 11, "33.0" },
124 { 0x05, 0x100, 12, "20.0" },
125 { 0x06, 0x110, 15, "16.0" },
126 { 0x07, 0x120, 18, "13.4" },
127 { 0x08, 0x000, 25, "10.0" },
128 { 0x19, 0x010, 31, "8.0" },
129 { 0x1a, 0x020, 37, "6.67" },
130 { 0x1b, 0x030, 43, "5.7" },
131 { 0x1c, 0x040, 50, "5.0" },
132 { 0x00, 0x050, 56, "4.4" },
133 { 0x00, 0x060, 62, "4.0" },
134 { 0x00, 0x070, 68, "3.6" },
135 { 0x00, 0x000, 0, NULL }
136 };
137
138 /* Our Sequencer Program */
139 #include "aic7xxx_seq.h"
140
141 /**************************** Function Declarations ***************************/
142 static void ahc_force_renegotiation(struct ahc_softc *ahc,
143 struct ahc_devinfo *devinfo);
144 static struct ahc_tmode_tstate*
145 ahc_alloc_tstate(struct ahc_softc *ahc,
146 u_int scsi_id, char channel);
147 #ifdef AHC_TARGET_MODE
148 static void ahc_free_tstate(struct ahc_softc *ahc,
149 u_int scsi_id, char channel, int force);
150 #endif
151 static struct ahc_syncrate*
152 ahc_devlimited_syncrate(struct ahc_softc *ahc,
153 struct ahc_initiator_tinfo *,
154 u_int *period,
155 u_int *ppr_options,
156 role_t role);
157 static void ahc_update_pending_scbs(struct ahc_softc *ahc);
158 static void ahc_fetch_devinfo(struct ahc_softc *ahc,
159 struct ahc_devinfo *devinfo);
160 static void ahc_scb_devinfo(struct ahc_softc *ahc,
161 struct ahc_devinfo *devinfo,
162 struct scb *scb);
163 static void ahc_assert_atn(struct ahc_softc *ahc);
164 static void ahc_setup_initiator_msgout(struct ahc_softc *ahc,
165 struct ahc_devinfo *devinfo,
166 struct scb *scb);
167 static void ahc_build_transfer_msg(struct ahc_softc *ahc,
168 struct ahc_devinfo *devinfo);
169 static void ahc_construct_sdtr(struct ahc_softc *ahc,
170 struct ahc_devinfo *devinfo,
171 u_int period, u_int offset);
172 static void ahc_construct_wdtr(struct ahc_softc *ahc,
173 struct ahc_devinfo *devinfo,
174 u_int bus_width);
175 static void ahc_construct_ppr(struct ahc_softc *ahc,
176 struct ahc_devinfo *devinfo,
177 u_int period, u_int offset,
178 u_int bus_width, u_int ppr_options);
179 static void ahc_clear_msg_state(struct ahc_softc *ahc);
180 static void ahc_handle_proto_violation(struct ahc_softc *ahc);
181 static void ahc_handle_message_phase(struct ahc_softc *ahc);
182 typedef enum {
183 AHCMSG_1B,
184 AHCMSG_2B,
185 AHCMSG_EXT
186 } ahc_msgtype;
187 static int ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type,
188 u_int msgval, int full);
189 static int ahc_parse_msg(struct ahc_softc *ahc,
190 struct ahc_devinfo *devinfo);
191 static int ahc_handle_msg_reject(struct ahc_softc *ahc,
192 struct ahc_devinfo *devinfo);
193 static void ahc_handle_ign_wide_residue(struct ahc_softc *ahc,
194 struct ahc_devinfo *devinfo);
195 static void ahc_reinitialize_dataptrs(struct ahc_softc *ahc);
196 static void ahc_handle_devreset(struct ahc_softc *ahc,
197 struct ahc_devinfo *devinfo,
198 cam_status status, char *message,
199 int verbose_level);
200 #ifdef AHC_TARGET_MODE
201 static void ahc_setup_target_msgin(struct ahc_softc *ahc,
202 struct ahc_devinfo *devinfo,
203 struct scb *scb);
204 #endif
205
206 static bus_dmamap_callback_t ahc_dmamap_cb;
207 static void ahc_build_free_scb_list(struct ahc_softc *ahc);
208 static int ahc_init_scbdata(struct ahc_softc *ahc);
209 static void ahc_fini_scbdata(struct ahc_softc *ahc);
210 static void ahc_qinfifo_requeue(struct ahc_softc *ahc,
211 struct scb *prev_scb,
212 struct scb *scb);
213 static int ahc_qinfifo_count(struct ahc_softc *ahc);
214 static u_int ahc_rem_scb_from_disc_list(struct ahc_softc *ahc,
215 u_int prev, u_int scbptr);
216 static void ahc_add_curscb_to_free_list(struct ahc_softc *ahc);
217 static u_int ahc_rem_wscb(struct ahc_softc *ahc,
218 u_int scbpos, u_int prev);
219 static void ahc_reset_current_bus(struct ahc_softc *ahc);
220 #ifdef AHC_DUMP_SEQ
221 static void ahc_dumpseq(struct ahc_softc *ahc);
222 #endif
223 static int ahc_loadseq(struct ahc_softc *ahc);
224 static int ahc_check_patch(struct ahc_softc *ahc,
225 struct patch **start_patch,
226 u_int start_instr, u_int *skip_addr);
227 static void ahc_download_instr(struct ahc_softc *ahc,
228 u_int instrptr, uint8_t *dconsts);
229 #ifdef AHC_TARGET_MODE
230 static void ahc_queue_lstate_event(struct ahc_softc *ahc,
231 struct ahc_tmode_lstate *lstate,
232 u_int initiator_id,
233 u_int event_type,
234 u_int event_arg);
235 static void ahc_update_scsiid(struct ahc_softc *ahc,
236 u_int targid_mask);
237 static int ahc_handle_target_cmd(struct ahc_softc *ahc,
238 struct target_cmd *cmd);
239 #endif
240 /************************* Sequencer Execution Control ************************/
241 /*
242 * Restart the sequencer program from address zero
243 */
244 void
245 ahc_restart(struct ahc_softc *ahc)
246 {
247
248 ahc_pause(ahc);
249
250 /* No more pending messages. */
251 ahc_clear_msg_state(ahc);
252
253 ahc_outb(ahc, SCSISIGO, 0); /* De-assert BSY */
254 ahc_outb(ahc, MSG_OUT, MSG_NOOP); /* No message to send */
255 ahc_outb(ahc, SXFRCTL1, ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET);
256 ahc_outb(ahc, LASTPHASE, P_BUSFREE);
257 ahc_outb(ahc, SAVED_SCSIID, 0xFF);
258 ahc_outb(ahc, SAVED_LUN, 0xFF);
259
260 /*
261 * Ensure that the sequencer's idea of TQINPOS
262 * matches our own. The sequencer increments TQINPOS
263 * only after it sees a DMA complete and a reset could
264 * occur before the increment leaving the kernel to believe
265 * the command arrived but the sequencer to not.
266 */
267 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext);
268
269 /* Always allow reselection */
270 ahc_outb(ahc, SCSISEQ,
271 ahc_inb(ahc, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP));
272 if ((ahc->features & AHC_CMD_CHAN) != 0) {
273 /* Ensure that no DMA operations are in progress */
274 ahc_outb(ahc, CCSCBCNT, 0);
275 ahc_outb(ahc, CCSGCTL, 0);
276 ahc_outb(ahc, CCSCBCTL, 0);
277 }
278 /*
279 * If we were in the process of DMA'ing SCB data into
280 * an SCB, replace that SCB on the free list. This prevents
281 * an SCB leak.
282 */
283 if ((ahc_inb(ahc, SEQ_FLAGS2) & SCB_DMA) != 0) {
284 ahc_add_curscb_to_free_list(ahc);
285 ahc_outb(ahc, SEQ_FLAGS2,
286 ahc_inb(ahc, SEQ_FLAGS2) & ~SCB_DMA);
287 }
288
289 /*
290 * Clear any pending sequencer interrupt. It is no
291 * longer relevant since we're resetting the Program
292 * Counter.
293 */
294 ahc_outb(ahc, CLRINT, CLRSEQINT);
295
296 ahc_outb(ahc, MWI_RESIDUAL, 0);
297 ahc_outb(ahc, SEQCTL, ahc->seqctl);
298 ahc_outb(ahc, SEQADDR0, 0);
299 ahc_outb(ahc, SEQADDR1, 0);
300
301 ahc_unpause(ahc);
302 }
303
304 /************************* Input/Output Queues ********************************/
305 void
306 ahc_run_qoutfifo(struct ahc_softc *ahc)
307 {
308 struct scb *scb;
309 u_int scb_index;
310
311 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD);
312 while (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) {
313
314 scb_index = ahc->qoutfifo[ahc->qoutfifonext];
315 if ((ahc->qoutfifonext & 0x03) == 0x03) {
316 u_int modnext;
317
318 /*
319 * Clear 32bits of QOUTFIFO at a time
320 * so that we don't clobber an incoming
321 * byte DMA to the array on architectures
322 * that only support 32bit load and store
323 * operations.
324 */
325 modnext = ahc->qoutfifonext & ~0x3;
326 *((uint32_t *)(&ahc->qoutfifo[modnext])) = 0xFFFFFFFFUL;
327 ahc_dmamap_sync(ahc, ahc->shared_data_dmat,
328 ahc->shared_data_dmamap,
329 /*offset*/modnext, /*len*/4,
330 BUS_DMASYNC_PREREAD);
331 }
332 ahc->qoutfifonext++;
333
334 scb = ahc_lookup_scb(ahc, scb_index);
335 if (scb == NULL) {
336 printf("%s: WARNING no command for scb %d "
337 "(cmdcmplt)\nQOUTPOS = %d\n",
338 ahc_name(ahc), scb_index,
339 (ahc->qoutfifonext - 1) & 0xFF);
340 continue;
341 }
342
343 /*
344 * Save off the residual
345 * if there is one.
346 */
347 ahc_update_residual(ahc, scb);
348 ahc_done(ahc, scb);
349 }
350 }
351
352 void
353 ahc_run_untagged_queues(struct ahc_softc *ahc)
354 {
355 int i;
356
357 for (i = 0; i < 16; i++)
358 ahc_run_untagged_queue(ahc, &ahc->untagged_queues[i]);
359 }
360
361 void
362 ahc_run_untagged_queue(struct ahc_softc *ahc, struct scb_tailq *queue)
363 {
364 struct scb *scb;
365
366 if (ahc->untagged_queue_lock != 0)
367 return;
368
369 if ((scb = TAILQ_FIRST(queue)) != NULL
370 && (scb->flags & SCB_ACTIVE) == 0) {
371 scb->flags |= SCB_ACTIVE;
372 ahc_queue_scb(ahc, scb);
373 }
374 }
375
376 /************************* Interrupt Handling *********************************/
377 void
378 ahc_handle_brkadrint(struct ahc_softc *ahc)
379 {
380 /*
381 * We upset the sequencer :-(
382 * Lookup the error message
383 */
384 int i;
385 int error;
386
387 error = ahc_inb(ahc, ERROR);
388 for (i = 0; error != 1 && i < num_errors; i++)
389 error >>= 1;
390 printf("%s: brkadrint, %s at seqaddr = 0x%x\n",
391 ahc_name(ahc), ahc_hard_errors[i].errmesg,
392 ahc_inb(ahc, SEQADDR0) |
393 (ahc_inb(ahc, SEQADDR1) << 8));
394
395 ahc_dump_card_state(ahc);
396
397 /* Tell everyone that this HBA is no longer available */
398 ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
399 CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN,
400 CAM_NO_HBA);
401
402 /* Disable all interrupt sources by resetting the controller */
403 ahc_shutdown(ahc);
404 }
405
406 void
407 ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat)
408 {
409 struct scb *scb;
410 struct ahc_devinfo devinfo;
411
412 ahc_fetch_devinfo(ahc, &devinfo);
413
414 /*
415 * Clear the upper byte that holds SEQINT status
416 * codes and clear the SEQINT bit. We will unpause
417 * the sequencer, if appropriate, after servicing
418 * the request.
419 */
420 ahc_outb(ahc, CLRINT, CLRSEQINT);
421 switch (intstat & SEQINT_MASK) {
422 case BAD_STATUS:
423 {
424 u_int scb_index;
425 struct hardware_scb *hscb;
426
427 /*
428 * Set the default return value to 0 (don't
429 * send sense). The sense code will change
430 * this if needed.
431 */
432 ahc_outb(ahc, RETURN_1, 0);
433
434 /*
435 * The sequencer will notify us when a command
436 * has an error that would be of interest to
437 * the kernel. This allows us to leave the sequencer
438 * running in the common case of command completes
439 * without error. The sequencer will already have
440 * dma'd the SCB back up to us, so we can reference
441 * the in kernel copy directly.
442 */
443 scb_index = ahc_inb(ahc, SCB_TAG);
444 scb = ahc_lookup_scb(ahc, scb_index);
445 if (scb == NULL) {
446 ahc_print_devinfo(ahc, &devinfo);
447 printf("ahc_intr - referenced scb "
448 "not valid during seqint 0x%x scb(%d)\n",
449 intstat, scb_index);
450 ahc_dump_card_state(ahc);
451 panic("for safety");
452 goto unpause;
453 }
454
455 hscb = scb->hscb;
456
457 /* Don't want to clobber the original sense code */
458 if ((scb->flags & SCB_SENSE) != 0) {
459 /*
460 * Clear the SCB_SENSE Flag and have
461 * the sequencer do a normal command
462 * complete.
463 */
464 scb->flags &= ~SCB_SENSE;
465 ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
466 break;
467 }
468 ahc_set_transaction_status(scb, CAM_SCSI_STATUS_ERROR);
469 /* Freeze the queue until the client sees the error. */
470 ahc_freeze_devq(ahc, scb);
471 ahc_freeze_scb(scb);
472 ahc_set_scsi_status(scb, hscb->shared_data.status.scsi_status);
473 switch (hscb->shared_data.status.scsi_status) {
474 case SCSI_STATUS_OK:
475 printf("%s: Interrupted for staus of 0???\n",
476 ahc_name(ahc));
477 break;
478 case SCSI_STATUS_CMD_TERMINATED:
479 case SCSI_STATUS_CHECK_COND:
480 {
481 struct ahc_dma_seg *sg;
482 struct scsi_sense *sc;
483 struct ahc_initiator_tinfo *targ_info;
484 struct ahc_tmode_tstate *tstate;
485 struct ahc_transinfo *tinfo;
486 #ifdef AHC_DEBUG
487 if (ahc_debug & AHC_SHOW_SENSE) {
488 ahc_print_path(ahc, scb);
489 printf("SCB %d: requests Check Status\n",
490 scb->hscb->tag);
491 }
492 #endif
493
494 if (ahc_perform_autosense(scb) == 0)
495 break;
496
497 targ_info = ahc_fetch_transinfo(ahc,
498 devinfo.channel,
499 devinfo.our_scsiid,
500 devinfo.target,
501 &tstate);
502 tinfo = &targ_info->curr;
503 sg = scb->sg_list;
504 sc = (struct scsi_sense *)(&hscb->shared_data.cdb);
505 /*
506 * Save off the residual if there is one.
507 */
508 ahc_update_residual(ahc, scb);
509 #ifdef AHC_DEBUG
510 if (ahc_debug & AHC_SHOW_SENSE) {
511 ahc_print_path(ahc, scb);
512 printf("Sending Sense\n");
513 }
514 #endif
515 sg->addr = ahc_get_sense_bufaddr(ahc, scb);
516 sg->len = ahc_get_sense_bufsize(ahc, scb);
517 sg->len |= AHC_DMA_LAST_SEG;
518
519 /* Fixup byte order */
520 sg->addr = ahc_htole32(sg->addr);
521 sg->len = ahc_htole32(sg->len);
522
523 sc->opcode = REQUEST_SENSE;
524 sc->byte2 = 0;
525 if (tinfo->protocol_version <= SCSI_REV_2
526 && SCB_GET_LUN(scb) < 8)
527 sc->byte2 = SCB_GET_LUN(scb) << 5;
528 sc->unused[0] = 0;
529 sc->unused[1] = 0;
530 sc->length = sg->len;
531 sc->control = 0;
532
533 /*
534 * We can't allow the target to disconnect.
535 * This will be an untagged transaction and
536 * having the target disconnect will make this
537 * transaction indestinguishable from outstanding
538 * tagged transactions.
539 */
540 hscb->control = 0;
541
542 /*
543 * This request sense could be because the
544 * the device lost power or in some other
545 * way has lost our transfer negotiations.
546 * Renegotiate if appropriate. Unit attention
547 * errors will be reported before any data
548 * phases occur.
549 */
550 if (ahc_get_residual(scb)
551 == ahc_get_transfer_length(scb)) {
552 ahc_update_neg_request(ahc, &devinfo,
553 tstate, targ_info,
554 AHC_NEG_IF_NON_ASYNC);
555 }
556 if (tstate->auto_negotiate & devinfo.target_mask) {
557 hscb->control |= MK_MESSAGE;
558 scb->flags &= ~SCB_NEGOTIATE;
559 scb->flags |= SCB_AUTO_NEGOTIATE;
560 }
561 hscb->cdb_len = sizeof(*sc);
562 hscb->dataptr = sg->addr;
563 hscb->datacnt = sg->len;
564 hscb->sgptr = scb->sg_list_phys | SG_FULL_RESID;
565 hscb->sgptr = ahc_htole32(hscb->sgptr);
566 scb->sg_count = 1;
567 scb->flags |= SCB_SENSE;
568 ahc_qinfifo_requeue_tail(ahc, scb);
569 ahc_outb(ahc, RETURN_1, SEND_SENSE);
570 /*
571 * Ensure we have enough time to actually
572 * retrieve the sense.
573 */
574 ahc_scb_timer_reset(scb, 5 * 1000000);
575 break;
576 }
577 default:
578 break;
579 }
580 break;
581 }
582 case NO_MATCH:
583 {
584 /* Ensure we don't leave the selection hardware on */
585 ahc_outb(ahc, SCSISEQ,
586 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
587
588 printf("%s:%c:%d: no active SCB for reconnecting "
589 "target - issuing BUS DEVICE RESET\n",
590 ahc_name(ahc), devinfo.channel, devinfo.target);
591 printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
592 "ARG_1 == 0x%x ACCUM = 0x%x\n",
593 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN),
594 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
595 printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
596 "SINDEX == 0x%x\n",
597 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR),
598 ahc_index_busy_tcl(ahc,
599 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID),
600 ahc_inb(ahc, SAVED_LUN))),
601 ahc_inb(ahc, SINDEX));
602 printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
603 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n",
604 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID),
605 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG),
606 ahc_inb(ahc, SCB_CONTROL));
607 printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n",
608 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI));
609 printf("SXFRCTL0 == 0x%x\n", ahc_inb(ahc, SXFRCTL0));
610 printf("SEQCTL == 0x%x\n", ahc_inb(ahc, SEQCTL));
611 ahc_dump_card_state(ahc);
612 ahc->msgout_buf[0] = MSG_BUS_DEV_RESET;
613 ahc->msgout_len = 1;
614 ahc->msgout_index = 0;
615 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
616 ahc_outb(ahc, MSG_OUT, HOST_MSG);
617 ahc_assert_atn(ahc);
618 break;
619 }
620 case SEND_REJECT:
621 {
622 u_int rejbyte = ahc_inb(ahc, ACCUM);
623 printf("%s:%c:%d: Warning - unknown message received from "
624 "target (0x%x). Rejecting\n",
625 ahc_name(ahc), devinfo.channel, devinfo.target, rejbyte);
626 break;
627 }
628 case PROTO_VIOLATION:
629 {
630 ahc_handle_proto_violation(ahc);
631 break;
632 }
633 case IGN_WIDE_RES:
634 ahc_handle_ign_wide_residue(ahc, &devinfo);
635 break;
636 case PDATA_REINIT:
637 ahc_reinitialize_dataptrs(ahc);
638 break;
639 case BAD_PHASE:
640 {
641 u_int lastphase;
642
643 lastphase = ahc_inb(ahc, LASTPHASE);
644 printf("%s:%c:%d: unknown scsi bus phase %x, "
645 "lastphase = 0x%x. Attempting to continue\n",
646 ahc_name(ahc), devinfo.channel, devinfo.target,
647 lastphase, ahc_inb(ahc, SCSISIGI));
648 break;
649 }
650 case MISSED_BUSFREE:
651 {
652 u_int lastphase;
653
654 lastphase = ahc_inb(ahc, LASTPHASE);
655 printf("%s:%c:%d: Missed busfree. "
656 "Lastphase = 0x%x, Curphase = 0x%x\n",
657 ahc_name(ahc), devinfo.channel, devinfo.target,
658 lastphase, ahc_inb(ahc, SCSISIGI));
659 ahc_restart(ahc);
660 return;
661 }
662 case HOST_MSG_LOOP:
663 {
664 /*
665 * The sequencer has encountered a message phase
666 * that requires host assistance for completion.
667 * While handling the message phase(s), we will be
668 * notified by the sequencer after each byte is
669 * transfered so we can track bus phase changes.
670 *
671 * If this is the first time we've seen a HOST_MSG_LOOP
672 * interrupt, initialize the state of the host message
673 * loop.
674 */
675 if (ahc->msg_type == MSG_TYPE_NONE) {
676 struct scb *scb;
677 u_int scb_index;
678 u_int bus_phase;
679
680 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
681 if (bus_phase != P_MESGIN
682 && bus_phase != P_MESGOUT) {
683 printf("ahc_intr: HOST_MSG_LOOP bad "
684 "phase 0x%x\n",
685 bus_phase);
686 /*
687 * Probably transitioned to bus free before
688 * we got here. Just punt the message.
689 */
690 ahc_clear_intstat(ahc);
691 ahc_restart(ahc);
692 return;
693 }
694
695 scb_index = ahc_inb(ahc, SCB_TAG);
696 scb = ahc_lookup_scb(ahc, scb_index);
697 if (devinfo.role == ROLE_INITIATOR) {
698 if (scb == NULL)
699 panic("HOST_MSG_LOOP with "
700 "invalid SCB %x\n", scb_index);
701
702 if (bus_phase == P_MESGOUT)
703 ahc_setup_initiator_msgout(ahc,
704 &devinfo,
705 scb);
706 else {
707 ahc->msg_type =
708 MSG_TYPE_INITIATOR_MSGIN;
709 ahc->msgin_index = 0;
710 }
711 }
712 #ifdef AHC_TARGET_MODE
713 else {
714 if (bus_phase == P_MESGOUT) {
715 ahc->msg_type =
716 MSG_TYPE_TARGET_MSGOUT;
717 ahc->msgin_index = 0;
718 }
719 else
720 ahc_setup_target_msgin(ahc,
721 &devinfo,
722 scb);
723 }
724 #endif
725 }
726
727 ahc_handle_message_phase(ahc);
728 break;
729 }
730 case PERR_DETECTED:
731 {
732 /*
733 * If we've cleared the parity error interrupt
734 * but the sequencer still believes that SCSIPERR
735 * is true, it must be that the parity error is
736 * for the currently presented byte on the bus,
737 * and we are not in a phase (data-in) where we will
738 * eventually ack this byte. Ack the byte and
739 * throw it away in the hope that the target will
740 * take us to message out to deliver the appropriate
741 * error message.
742 */
743 if ((intstat & SCSIINT) == 0
744 && (ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0) {
745
746 if ((ahc->features & AHC_DT) == 0) {
747 u_int curphase;
748
749 /*
750 * The hardware will only let you ack bytes
751 * if the expected phase in SCSISIGO matches
752 * the current phase. Make sure this is
753 * currently the case.
754 */
755 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
756 ahc_outb(ahc, LASTPHASE, curphase);
757 ahc_outb(ahc, SCSISIGO, curphase);
758 }
759 if ((ahc_inb(ahc, SCSISIGI) & (CDI|MSGI)) == 0) {
760 int wait;
761
762 /*
763 * In a data phase. Faster to bitbucket
764 * the data than to individually ack each
765 * byte. This is also the only strategy
766 * that will work with AUTOACK enabled.
767 */
768 ahc_outb(ahc, SXFRCTL1,
769 ahc_inb(ahc, SXFRCTL1) | BITBUCKET);
770 wait = 5000;
771 while (--wait != 0) {
772 if ((ahc_inb(ahc, SCSISIGI)
773 & (CDI|MSGI)) != 0)
774 break;
775 ahc_delay(100);
776 }
777 ahc_outb(ahc, SXFRCTL1,
778 ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET);
779 if (wait == 0) {
780 struct scb *scb;
781 u_int scb_index;
782
783 ahc_print_devinfo(ahc, &devinfo);
784 printf("Unable to clear parity error. "
785 "Resetting bus.\n");
786 scb_index = ahc_inb(ahc, SCB_TAG);
787 scb = ahc_lookup_scb(ahc, scb_index);
788 if (scb != NULL)
789 ahc_set_transaction_status(scb,
790 CAM_UNCOR_PARITY);
791 ahc_reset_channel(ahc, devinfo.channel,
792 /*init reset*/TRUE);
793 }
794 } else {
795 ahc_inb(ahc, SCSIDATL);
796 }
797 }
798 break;
799 }
800 case DATA_OVERRUN:
801 {
802 /*
803 * When the sequencer detects an overrun, it
804 * places the controller in "BITBUCKET" mode
805 * and allows the target to complete its transfer.
806 * Unfortunately, none of the counters get updated
807 * when the controller is in this mode, so we have
808 * no way of knowing how large the overrun was.
809 */
810 u_int scbindex = ahc_inb(ahc, SCB_TAG);
811 u_int lastphase = ahc_inb(ahc, LASTPHASE);
812 u_int i;
813
814 scb = ahc_lookup_scb(ahc, scbindex);
815 for (i = 0; i < num_phases; i++) {
816 if (lastphase == ahc_phase_table[i].phase)
817 break;
818 }
819 ahc_print_path(ahc, scb);
820 printf("data overrun detected %s."
821 " Tag == 0x%x.\n",
822 ahc_phase_table[i].phasemsg,
823 scb->hscb->tag);
824 ahc_print_path(ahc, scb);
825 printf("%s seen Data Phase. Length = %ld. NumSGs = %d.\n",
826 ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't",
827 ahc_get_transfer_length(scb), scb->sg_count);
828 if (scb->sg_count > 0) {
829 for (i = 0; i < scb->sg_count; i++) {
830
831 printf("sg[%d] - Addr 0x%x%x : Length %d\n",
832 i,
833 (ahc_le32toh(scb->sg_list[i].len) >> 24
834 & SG_HIGH_ADDR_BITS),
835 ahc_le32toh(scb->sg_list[i].addr),
836 ahc_le32toh(scb->sg_list[i].len)
837 & AHC_SG_LEN_MASK);
838 }
839 }
840 /*
841 * Set this and it will take effect when the
842 * target does a command complete.
843 */
844 ahc_freeze_devq(ahc, scb);
845 if ((scb->flags & SCB_SENSE) == 0) {
846 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
847 } else {
848 scb->flags &= ~SCB_SENSE;
849 ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
850 }
851 ahc_freeze_scb(scb);
852
853 if ((ahc->features & AHC_ULTRA2) != 0) {
854 /*
855 * Clear the channel in case we return
856 * to data phase later.
857 */
858 ahc_outb(ahc, SXFRCTL0,
859 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN);
860 ahc_outb(ahc, SXFRCTL0,
861 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN);
862 }
863 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
864 u_int dscommand1;
865
866 /* Ensure HHADDR is 0 for future DMA operations. */
867 dscommand1 = ahc_inb(ahc, DSCOMMAND1);
868 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0);
869 ahc_outb(ahc, HADDR, 0);
870 ahc_outb(ahc, DSCOMMAND1, dscommand1);
871 }
872 break;
873 }
874 case MKMSG_FAILED:
875 {
876 u_int scbindex;
877
878 printf("%s:%c:%d:%d: Attempt to issue message failed\n",
879 ahc_name(ahc), devinfo.channel, devinfo.target,
880 devinfo.lun);
881 scbindex = ahc_inb(ahc, SCB_TAG);
882 scb = ahc_lookup_scb(ahc, scbindex);
883 if (scb != NULL
884 && (scb->flags & SCB_RECOVERY_SCB) != 0)
885 /*
886 * Ensure that we didn't put a second instance of this
887 * SCB into the QINFIFO.
888 */
889 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb),
890 SCB_GET_CHANNEL(ahc, scb),
891 SCB_GET_LUN(scb), scb->hscb->tag,
892 ROLE_INITIATOR, /*status*/0,
893 SEARCH_REMOVE);
894 break;
895 }
896 case NO_FREE_SCB:
897 {
898 printf("%s: No free or disconnected SCBs\n", ahc_name(ahc));
899 ahc_dump_card_state(ahc);
900 panic("for safety");
901 break;
902 }
903 case SCB_MISMATCH:
904 {
905 u_int scbptr;
906
907 scbptr = ahc_inb(ahc, SCBPTR);
908 printf("Bogus TAG after DMA. SCBPTR %d, tag %d, our tag %d\n",
909 scbptr, ahc_inb(ahc, ARG_1),
910 ahc->scb_data->hscbs[scbptr].tag);
911 ahc_dump_card_state(ahc);
912 panic("for saftey");
913 break;
914 }
915 case OUT_OF_RANGE:
916 {
917 printf("%s: BTT calculation out of range\n", ahc_name(ahc));
918 printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
919 "ARG_1 == 0x%x ACCUM = 0x%x\n",
920 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN),
921 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
922 printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
923 "SINDEX == 0x%x\n, A == 0x%x\n",
924 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR),
925 ahc_index_busy_tcl(ahc,
926 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID),
927 ahc_inb(ahc, SAVED_LUN))),
928 ahc_inb(ahc, SINDEX),
929 ahc_inb(ahc, ACCUM));
930 printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
931 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n",
932 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID),
933 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG),
934 ahc_inb(ahc, SCB_CONTROL));
935 printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n",
936 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI));
937 ahc_dump_card_state(ahc);
938 panic("for safety");
939 break;
940 }
941 default:
942 printf("ahc_intr: seqint, "
943 "intstat == 0x%x, scsisigi = 0x%x\n",
944 intstat, ahc_inb(ahc, SCSISIGI));
945 break;
946 }
947 unpause:
948 /*
949 * The sequencer is paused immediately on
950 * a SEQINT, so we should restart it when
951 * we're done.
952 */
953 ahc_unpause(ahc);
954 }
955
956 void
957 ahc_handle_scsiint(struct ahc_softc *ahc, u_int intstat)
958 {
959 u_int scb_index;
960 u_int status0;
961 u_int status;
962 struct scb *scb;
963 char cur_channel;
964 char intr_channel;
965
966 if ((ahc->features & AHC_TWIN) != 0
967 && ((ahc_inb(ahc, SBLKCTL) & SELBUSB) != 0))
968 cur_channel = 'B';
969 else
970 cur_channel = 'A';
971 intr_channel = cur_channel;
972
973 if ((ahc->features & AHC_ULTRA2) != 0)
974 status0 = ahc_inb(ahc, SSTAT0) & IOERR;
975 else
976 status0 = 0;
977 status = ahc_inb(ahc, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
978 if (status == 0 && status0 == 0) {
979 if ((ahc->features & AHC_TWIN) != 0) {
980 /* Try the other channel */
981 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB);
982 status = ahc_inb(ahc, SSTAT1)
983 & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
984 intr_channel = (cur_channel == 'A') ? 'B' : 'A';
985 }
986 if (status == 0) {
987 printf("%s: Spurious SCSI interrupt\n", ahc_name(ahc));
988 ahc_outb(ahc, CLRINT, CLRSCSIINT);
989 ahc_unpause(ahc);
990 return;
991 }
992 }
993
994 /* Make sure the sequencer is in a safe location. */
995 ahc_clear_critical_section(ahc);
996
997 scb_index = ahc_inb(ahc, SCB_TAG);
998 scb = ahc_lookup_scb(ahc, scb_index);
999 if (scb != NULL
1000 && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) != 0)
1001 scb = NULL;
1002
1003 if ((ahc->features & AHC_ULTRA2) != 0
1004 && (status0 & IOERR) != 0) {
1005 int now_lvd;
1006
1007 now_lvd = ahc_inb(ahc, SBLKCTL) & ENAB40;
1008 printf("%s: Transceiver State Has Changed to %s mode\n",
1009 ahc_name(ahc), now_lvd ? "LVD" : "SE");
1010 ahc_outb(ahc, CLRSINT0, CLRIOERR);
1011 /*
1012 * When transitioning to SE mode, the reset line
1013 * glitches, triggering an arbitration bug in some
1014 * Ultra2 controllers. This bug is cleared when we
1015 * assert the reset line. Since a reset glitch has
1016 * already occurred with this transition and a
1017 * transceiver state change is handled just like
1018 * a bus reset anyway, asserting the reset line
1019 * ourselves is safe.
1020 */
1021 ahc_reset_channel(ahc, intr_channel,
1022 /*Initiate Reset*/now_lvd == 0);
1023 } else if ((status & SCSIRSTI) != 0) {
1024 printf("%s: Someone reset channel %c\n",
1025 ahc_name(ahc), intr_channel);
1026 if (intr_channel != cur_channel)
1027 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB);
1028 ahc_reset_channel(ahc, intr_channel, /*Initiate Reset*/FALSE);
1029 } else if ((status & SCSIPERR) != 0) {
1030 /*
1031 * Determine the bus phase and queue an appropriate message.
1032 * SCSIPERR is latched true as soon as a parity error
1033 * occurs. If the sequencer acked the transfer that
1034 * caused the parity error and the currently presented
1035 * transfer on the bus has correct parity, SCSIPERR will
1036 * be cleared by CLRSCSIPERR. Use this to determine if
1037 * we should look at the last phase the sequencer recorded,
1038 * or the current phase presented on the bus.
1039 */
1040 struct ahc_devinfo devinfo;
1041 u_int mesg_out;
1042 u_int curphase;
1043 u_int errorphase;
1044 u_int lastphase;
1045 u_int scsirate;
1046 u_int i;
1047 u_int sstat2;
1048 int silent;
1049
1050 lastphase = ahc_inb(ahc, LASTPHASE);
1051 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
1052 sstat2 = ahc_inb(ahc, SSTAT2);
1053 ahc_outb(ahc, CLRSINT1, CLRSCSIPERR);
1054 /*
1055 * For all phases save DATA, the sequencer won't
1056 * automatically ack a byte that has a parity error
1057 * in it. So the only way that the current phase
1058 * could be 'data-in' is if the parity error is for
1059 * an already acked byte in the data phase. During
1060 * synchronous data-in transfers, we may actually
1061 * ack bytes before latching the current phase in
1062 * LASTPHASE, leading to the discrepancy between
1063 * curphase and lastphase.
1064 */
1065 if ((ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0
1066 || curphase == P_DATAIN || curphase == P_DATAIN_DT)
1067 errorphase = curphase;
1068 else
1069 errorphase = lastphase;
1070
1071 for (i = 0; i < num_phases; i++) {
1072 if (errorphase == ahc_phase_table[i].phase)
1073 break;
1074 }
1075 mesg_out = ahc_phase_table[i].mesg_out;
1076 silent = FALSE;
1077 if (scb != NULL) {
1078 if (SCB_IS_SILENT(scb))
1079 silent = TRUE;
1080 else
1081 ahc_print_path(ahc, scb);
1082 scb->flags |= SCB_TRANSMISSION_ERROR;
1083 } else
1084 printf("%s:%c:%d: ", ahc_name(ahc), intr_channel,
1085 SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID)));
1086 scsirate = ahc_inb(ahc, SCSIRATE);
1087 if (silent == FALSE) {
1088 printf("parity error detected %s. "
1089 "SEQADDR(0x%x) SCSIRATE(0x%x)\n",
1090 ahc_phase_table[i].phasemsg,
1091 ahc_inw(ahc, SEQADDR0),
1092 scsirate);
1093 if ((ahc->features & AHC_DT) != 0) {
1094 if ((sstat2 & CRCVALERR) != 0)
1095 printf("\tCRC Value Mismatch\n");
1096 if ((sstat2 & CRCENDERR) != 0)
1097 printf("\tNo terminal CRC packet "
1098 "recevied\n");
1099 if ((sstat2 & CRCREQERR) != 0)
1100 printf("\tIllegal CRC packet "
1101 "request\n");
1102 if ((sstat2 & DUAL_EDGE_ERR) != 0)
1103 printf("\tUnexpected %sDT Data Phase\n",
1104 (scsirate & SINGLE_EDGE)
1105 ? "" : "non-");
1106 }
1107 }
1108
1109 if ((ahc->features & AHC_DT) != 0
1110 && (sstat2 & DUAL_EDGE_ERR) != 0) {
1111 /*
1112 * This error applies regardless of
1113 * data direction, so ignore the value
1114 * in the phase table.
1115 */
1116 mesg_out = MSG_INITIATOR_DET_ERR;
1117 }
1118
1119 /*
1120 * We've set the hardware to assert ATN if we
1121 * get a parity error on "in" phases, so all we
1122 * need to do is stuff the message buffer with
1123 * the appropriate message. "In" phases have set
1124 * mesg_out to something other than MSG_NOP.
1125 */
1126 if (mesg_out != MSG_NOOP) {
1127 if (ahc->msg_type != MSG_TYPE_NONE)
1128 ahc->send_msg_perror = TRUE;
1129 else
1130 ahc_outb(ahc, MSG_OUT, mesg_out);
1131 }
1132 /*
1133 * Force a renegotiation with this target just in
1134 * case we are out of sync for some external reason
1135 * unknown (or unreported) by the target.
1136 */
1137 ahc_fetch_devinfo(ahc, &devinfo);
1138 ahc_force_renegotiation(ahc, &devinfo);
1139
1140 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1141 ahc_unpause(ahc);
1142 } else if ((status & SELTO) != 0) {
1143 u_int scbptr;
1144
1145 /* Stop the selection */
1146 ahc_outb(ahc, SCSISEQ, 0);
1147
1148 /* No more pending messages */
1149 ahc_clear_msg_state(ahc);
1150
1151 /* Clear interrupt state */
1152 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
1153 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR);
1154
1155 /*
1156 * Although the driver does not care about the
1157 * 'Selection in Progress' status bit, the busy
1158 * LED does. SELINGO is only cleared by a sucessfull
1159 * selection, so we must manually clear it to insure
1160 * the LED turns off just incase no future successful
1161 * selections occur (e.g. no devices on the bus).
1162 */
1163 ahc_outb(ahc, CLRSINT0, CLRSELINGO);
1164
1165 scbptr = ahc_inb(ahc, WAITING_SCBH);
1166 ahc_outb(ahc, SCBPTR, scbptr);
1167 scb_index = ahc_inb(ahc, SCB_TAG);
1168
1169 scb = ahc_lookup_scb(ahc, scb_index);
1170 if (scb == NULL) {
1171 printf("%s: ahc_intr - referenced scb not "
1172 "valid during SELTO scb(%d, %d)\n",
1173 ahc_name(ahc), scbptr, scb_index);
1174 ahc_dump_card_state(ahc);
1175 } else {
1176 struct ahc_devinfo devinfo;
1177 #ifdef AHC_DEBUG
1178 if ((ahc_debug & AHC_SHOW_SELTO) != 0) {
1179 ahc_print_path(ahc, scb);
1180 printf("Saw Selection Timeout for SCB 0x%x\n",
1181 scb_index);
1182 }
1183 #endif
1184 ahc_scb_devinfo(ahc, &devinfo, scb);
1185 ahc_set_transaction_status(scb, CAM_SEL_TIMEOUT);
1186 ahc_freeze_devq(ahc, scb);
1187
1188 /*
1189 * Cancel any pending transactions on the device
1190 * now that it seems to be missing. This will
1191 * also revert us to async/narrow transfers until
1192 * we can renegotiate with the device.
1193 */
1194 ahc_handle_devreset(ahc, &devinfo,
1195 CAM_SEL_TIMEOUT,
1196 "Selection Timeout",
1197 /*verbose_level*/1);
1198 }
1199 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1200 ahc_restart(ahc);
1201 } else if ((status & BUSFREE) != 0
1202 && (ahc_inb(ahc, SIMODE1) & ENBUSFREE) != 0) {
1203 struct ahc_devinfo devinfo;
1204 u_int lastphase;
1205 u_int saved_scsiid;
1206 u_int saved_lun;
1207 u_int target;
1208 u_int initiator_role_id;
1209 char channel;
1210 int printerror;
1211
1212 /*
1213 * Clear our selection hardware as soon as possible.
1214 * We may have an entry in the waiting Q for this target,
1215 * that is affected by this busfree and we don't want to
1216 * go about selecting the target while we handle the event.
1217 */
1218 ahc_outb(ahc, SCSISEQ,
1219 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
1220
1221 /*
1222 * Disable busfree interrupts and clear the busfree
1223 * interrupt status. We do this here so that several
1224 * bus transactions occur prior to clearing the SCSIINT
1225 * latch. It can take a bit for the clearing to take effect.
1226 */
1227 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
1228 ahc_outb(ahc, CLRSINT1, CLRBUSFREE|CLRSCSIPERR);
1229
1230 /*
1231 * Look at what phase we were last in.
1232 * If its message out, chances are pretty good
1233 * that the busfree was in response to one of
1234 * our abort requests.
1235 */
1236 lastphase = ahc_inb(ahc, LASTPHASE);
1237 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
1238 saved_lun = ahc_inb(ahc, SAVED_LUN);
1239 target = SCSIID_TARGET(ahc, saved_scsiid);
1240 initiator_role_id = SCSIID_OUR_ID(saved_scsiid);
1241 channel = SCSIID_CHANNEL(ahc, saved_scsiid);
1242 ahc_compile_devinfo(&devinfo, initiator_role_id,
1243 target, saved_lun, channel, ROLE_INITIATOR);
1244 printerror = 1;
1245
1246 if (lastphase == P_MESGOUT) {
1247 u_int tag;
1248
1249 tag = SCB_LIST_NULL;
1250 if (ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT_TAG, TRUE)
1251 || ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT, TRUE)) {
1252 if (ahc->msgout_buf[ahc->msgout_index - 1]
1253 == MSG_ABORT_TAG)
1254 tag = scb->hscb->tag;
1255 ahc_print_path(ahc, scb);
1256 printf("SCB %d - Abort%s Completed.\n",
1257 scb->hscb->tag, tag == SCB_LIST_NULL ?
1258 "" : " Tag");
1259 ahc_abort_scbs(ahc, target, channel,
1260 saved_lun, tag,
1261 ROLE_INITIATOR,
1262 CAM_REQ_ABORTED);
1263 printerror = 0;
1264 } else if (ahc_sent_msg(ahc, AHCMSG_1B,
1265 MSG_BUS_DEV_RESET, TRUE)) {
1266 #ifdef __FreeBSD__
1267 /*
1268 * Don't mark the user's request for this BDR
1269 * as completing with CAM_BDR_SENT. CAM3
1270 * specifies CAM_REQ_CMP.
1271 */
1272 if (scb != NULL
1273 && scb->io_ctx->ccb_h.func_code== XPT_RESET_DEV
1274 && ahc_match_scb(ahc, scb, target, channel,
1275 CAM_LUN_WILDCARD,
1276 SCB_LIST_NULL,
1277 ROLE_INITIATOR)) {
1278 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1279 }
1280 #endif
1281 ahc_compile_devinfo(&devinfo,
1282 initiator_role_id,
1283 target,
1284 CAM_LUN_WILDCARD,
1285 channel,
1286 ROLE_INITIATOR);
1287 ahc_handle_devreset(ahc, &devinfo,
1288 CAM_BDR_SENT,
1289 "Bus Device Reset",
1290 /*verbose_level*/0);
1291 printerror = 0;
1292 } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1293 MSG_EXT_PPR, FALSE)) {
1294 struct ahc_initiator_tinfo *tinfo;
1295 struct ahc_tmode_tstate *tstate;
1296
1297 /*
1298 * PPR Rejected. Try non-ppr negotiation
1299 * and retry command.
1300 */
1301 tinfo = ahc_fetch_transinfo(ahc,
1302 devinfo.channel,
1303 devinfo.our_scsiid,
1304 devinfo.target,
1305 &tstate);
1306 tinfo->curr.transport_version = 2;
1307 tinfo->goal.transport_version = 2;
1308 tinfo->goal.ppr_options = 0;
1309 ahc_qinfifo_requeue_tail(ahc, scb);
1310 printerror = 0;
1311 } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1312 MSG_EXT_WDTR, FALSE)) {
1313 /*
1314 * Negotiation Rejected. Go-narrow and
1315 * retry command.
1316 */
1317 ahc_set_width(ahc, &devinfo,
1318 MSG_EXT_WDTR_BUS_8_BIT,
1319 AHC_TRANS_CUR|AHC_TRANS_GOAL,
1320 /*paused*/TRUE);
1321 ahc_qinfifo_requeue_tail(ahc, scb);
1322 printerror = 0;
1323 } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1324 MSG_EXT_SDTR, FALSE)) {
1325 /*
1326 * Negotiation Rejected. Go-async and
1327 * retry command.
1328 */
1329 ahc_set_syncrate(ahc, &devinfo,
1330 /*syncrate*/NULL,
1331 /*period*/0, /*offset*/0,
1332 /*ppr_options*/0,
1333 AHC_TRANS_CUR|AHC_TRANS_GOAL,
1334 /*paused*/TRUE);
1335 ahc_qinfifo_requeue_tail(ahc, scb);
1336 printerror = 0;
1337 }
1338 }
1339 if (printerror != 0) {
1340 u_int i;
1341
1342 if (scb != NULL) {
1343 u_int tag;
1344
1345 if ((scb->hscb->control & TAG_ENB) != 0)
1346 tag = scb->hscb->tag;
1347 else
1348 tag = SCB_LIST_NULL;
1349 ahc_print_path(ahc, scb);
1350 ahc_abort_scbs(ahc, target, channel,
1351 SCB_GET_LUN(scb), tag,
1352 ROLE_INITIATOR,
1353 CAM_UNEXP_BUSFREE);
1354 } else {
1355 /*
1356 * We had not fully identified this connection,
1357 * so we cannot abort anything.
1358 */
1359 printf("%s: ", ahc_name(ahc));
1360 }
1361 for (i = 0; i < num_phases; i++) {
1362 if (lastphase == ahc_phase_table[i].phase)
1363 break;
1364 }
1365 if (lastphase != P_BUSFREE) {
1366 /*
1367 * Renegotiate with this device at the
1368 * next oportunity just in case this busfree
1369 * is due to a negotiation mismatch with the
1370 * device.
1371 */
1372 ahc_force_renegotiation(ahc, &devinfo);
1373 }
1374 printf("Unexpected busfree %s\n"
1375 "SEQADDR == 0x%x\n",
1376 ahc_phase_table[i].phasemsg,
1377 ahc_inb(ahc, SEQADDR0)
1378 | (ahc_inb(ahc, SEQADDR1) << 8));
1379 }
1380 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1381 ahc_restart(ahc);
1382 } else {
1383 printf("%s: Missing case in ahc_handle_scsiint. status = %x\n",
1384 ahc_name(ahc), status);
1385 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1386 }
1387 }
1388
1389 /*
1390 * Force renegotiation to occur the next time we initiate
1391 * a command to the current device.
1392 */
1393 static void
1394 ahc_force_renegotiation(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1395 {
1396 struct ahc_initiator_tinfo *targ_info;
1397 struct ahc_tmode_tstate *tstate;
1398
1399 targ_info = ahc_fetch_transinfo(ahc,
1400 devinfo->channel,
1401 devinfo->our_scsiid,
1402 devinfo->target,
1403 &tstate);
1404 ahc_update_neg_request(ahc, devinfo, tstate,
1405 targ_info, AHC_NEG_IF_NON_ASYNC);
1406 }
1407
1408 #define AHC_MAX_STEPS 2000
1409 void
1410 ahc_clear_critical_section(struct ahc_softc *ahc)
1411 {
1412 int stepping;
1413 int steps;
1414 u_int simode0;
1415 u_int simode1;
1416
1417 if (ahc->num_critical_sections == 0)
1418 return;
1419
1420 stepping = FALSE;
1421 steps = 0;
1422 simode0 = 0;
1423 simode1 = 0;
1424 for (;;) {
1425 struct cs *cs;
1426 u_int seqaddr;
1427 u_int i;
1428
1429 seqaddr = ahc_inb(ahc, SEQADDR0)
1430 | (ahc_inb(ahc, SEQADDR1) << 8);
1431
1432 /*
1433 * Seqaddr represents the next instruction to execute,
1434 * so we are really executing the instruction just
1435 * before it.
1436 */
1437 if (seqaddr != 0)
1438 seqaddr -= 1;
1439 cs = ahc->critical_sections;
1440 for (i = 0; i < ahc->num_critical_sections; i++, cs++) {
1441
1442 if (cs->begin < seqaddr && cs->end >= seqaddr)
1443 break;
1444 }
1445
1446 if (i == ahc->num_critical_sections)
1447 break;
1448
1449 if (steps > AHC_MAX_STEPS) {
1450 printf("%s: Infinite loop in critical section\n",
1451 ahc_name(ahc));
1452 ahc_dump_card_state(ahc);
1453 panic("critical section loop");
1454 }
1455
1456 steps++;
1457 if (stepping == FALSE) {
1458
1459 /*
1460 * Disable all interrupt sources so that the
1461 * sequencer will not be stuck by a pausing
1462 * interrupt condition while we attempt to
1463 * leave a critical section.
1464 */
1465 simode0 = ahc_inb(ahc, SIMODE0);
1466 ahc_outb(ahc, SIMODE0, 0);
1467 simode1 = ahc_inb(ahc, SIMODE1);
1468 if ((ahc->features & AHC_DT) != 0)
1469 /*
1470 * On DT class controllers, we
1471 * use the enhanced busfree logic.
1472 * Unfortunately we cannot re-enable
1473 * busfree detection within the
1474 * current connection, so we must
1475 * leave it on while single stepping.
1476 */
1477 ahc_outb(ahc, SIMODE1, simode1 & ENBUSFREE);
1478 else
1479 ahc_outb(ahc, SIMODE1, 0);
1480 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1481 ahc_outb(ahc, SEQCTL, ahc->seqctl | STEP);
1482 stepping = TRUE;
1483 }
1484 if ((ahc->features & AHC_DT) != 0) {
1485 ahc_outb(ahc, CLRSINT1, CLRBUSFREE);
1486 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1487 }
1488 ahc_outb(ahc, HCNTRL, ahc->unpause);
1489 while (!ahc_is_paused(ahc))
1490 ahc_delay(200);
1491 }
1492 if (stepping) {
1493 ahc_outb(ahc, SIMODE0, simode0);
1494 ahc_outb(ahc, SIMODE1, simode1);
1495 ahc_outb(ahc, SEQCTL, ahc->seqctl);
1496 }
1497 }
1498
1499 /*
1500 * Clear any pending interrupt status.
1501 */
1502 void
1503 ahc_clear_intstat(struct ahc_softc *ahc)
1504 {
1505 /* Clear any interrupt conditions this may have caused */
1506 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI
1507 |CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG|
1508 CLRREQINIT);
1509 ahc_flush_device_writes(ahc);
1510 ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO);
1511 ahc_flush_device_writes(ahc);
1512 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1513 ahc_flush_device_writes(ahc);
1514 }
1515
1516 /**************************** Debugging Routines ******************************/
1517 #ifdef AHC_DEBUG
1518 uint32_t ahc_debug = AHC_DEBUG_OPTS;
1519 #endif
1520
1521 void
1522 ahc_print_scb(struct scb *scb)
1523 {
1524 int i;
1525
1526 struct hardware_scb *hscb = scb->hscb;
1527
1528 printf("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n",
1529 (void *)scb,
1530 hscb->control,
1531 hscb->scsiid,
1532 hscb->lun,
1533 hscb->cdb_len);
1534 printf("Shared Data: ");
1535 for (i = 0; i < sizeof(hscb->shared_data.cdb); i++)
1536 printf("%#02x", hscb->shared_data.cdb[i]);
1537 printf(" dataptr:%#x datacnt:%#x sgptr:%#x tag:%#x\n",
1538 ahc_le32toh(hscb->dataptr),
1539 ahc_le32toh(hscb->datacnt),
1540 ahc_le32toh(hscb->sgptr),
1541 hscb->tag);
1542 if (scb->sg_count > 0) {
1543 for (i = 0; i < scb->sg_count; i++) {
1544 printf("sg[%d] - Addr 0x%x%x : Length %d\n",
1545 i,
1546 (ahc_le32toh(scb->sg_list[i].len) >> 24
1547 & SG_HIGH_ADDR_BITS),
1548 ahc_le32toh(scb->sg_list[i].addr),
1549 ahc_le32toh(scb->sg_list[i].len));
1550 }
1551 }
1552 }
1553
1554 /************************* Transfer Negotiation *******************************/
1555 /*
1556 * Allocate per target mode instance (ID we respond to as a target)
1557 * transfer negotiation data structures.
1558 */
1559 static struct ahc_tmode_tstate *
1560 ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel)
1561 {
1562 struct ahc_tmode_tstate *master_tstate;
1563 struct ahc_tmode_tstate *tstate;
1564 int i;
1565
1566 master_tstate = ahc->enabled_targets[ahc->our_id];
1567 if (channel == 'B') {
1568 scsi_id += 8;
1569 master_tstate = ahc->enabled_targets[ahc->our_id_b + 8];
1570 }
1571 if (ahc->enabled_targets[scsi_id] != NULL
1572 && ahc->enabled_targets[scsi_id] != master_tstate)
1573 panic("%s: ahc_alloc_tstate - Target already allocated",
1574 ahc_name(ahc));
1575 tstate = (struct ahc_tmode_tstate*)malloc(sizeof(*tstate),
1576 M_DEVBUF, M_NOWAIT);
1577 if (tstate == NULL)
1578 return (NULL);
1579
1580 /*
1581 * If we have allocated a master tstate, copy user settings from
1582 * the master tstate (taken from SRAM or the EEPROM) for this
1583 * channel, but reset our current and goal settings to async/narrow
1584 * until an initiator talks to us.
1585 */
1586 if (master_tstate != NULL) {
1587 memcpy(tstate, master_tstate, sizeof(*tstate));
1588 memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns));
1589 tstate->ultraenb = 0;
1590 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1591 memset(&tstate->transinfo[i].curr, 0,
1592 sizeof(tstate->transinfo[i].curr));
1593 memset(&tstate->transinfo[i].goal, 0,
1594 sizeof(tstate->transinfo[i].goal));
1595 }
1596 } else
1597 memset(tstate, 0, sizeof(*tstate));
1598 ahc->enabled_targets[scsi_id] = tstate;
1599 return (tstate);
1600 }
1601
1602 #ifdef AHC_TARGET_MODE
1603 /*
1604 * Free per target mode instance (ID we respond to as a target)
1605 * transfer negotiation data structures.
1606 */
1607 static void
1608 ahc_free_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel, int force)
1609 {
1610 struct ahc_tmode_tstate *tstate;
1611
1612 /*
1613 * Don't clean up our "master" tstate.
1614 * It has our default user settings.
1615 */
1616 if (((channel == 'B' && scsi_id == ahc->our_id_b)
1617 || (channel == 'A' && scsi_id == ahc->our_id))
1618 && force == FALSE)
1619 return;
1620
1621 if (channel == 'B')
1622 scsi_id += 8;
1623 tstate = ahc->enabled_targets[scsi_id];
1624 if (tstate != NULL)
1625 free(tstate, M_DEVBUF);
1626 ahc->enabled_targets[scsi_id] = NULL;
1627 }
1628 #endif
1629
1630 /*
1631 * Called when we have an active connection to a target on the bus,
1632 * this function finds the nearest syncrate to the input period limited
1633 * by the capabilities of the bus connectivity of and sync settings for
1634 * the target.
1635 */
1636 struct ahc_syncrate *
1637 ahc_devlimited_syncrate(struct ahc_softc *ahc,
1638 struct ahc_initiator_tinfo *tinfo,
1639 u_int *period, u_int *ppr_options, role_t role)
1640 {
1641 struct ahc_transinfo *transinfo;
1642 u_int maxsync;
1643
1644 if ((ahc->features & AHC_ULTRA2) != 0) {
1645 if ((ahc_inb(ahc, SBLKCTL) & ENAB40) != 0
1646 && (ahc_inb(ahc, SSTAT2) & EXP_ACTIVE) == 0) {
1647 maxsync = AHC_SYNCRATE_DT;
1648 } else {
1649 maxsync = AHC_SYNCRATE_ULTRA;
1650 /* Can't do DT on an SE bus */
1651 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1652 }
1653 } else if ((ahc->features & AHC_ULTRA) != 0) {
1654 maxsync = AHC_SYNCRATE_ULTRA;
1655 } else {
1656 maxsync = AHC_SYNCRATE_FAST;
1657 }
1658 /*
1659 * Never allow a value higher than our current goal
1660 * period otherwise we may allow a target initiated
1661 * negotiation to go above the limit as set by the
1662 * user. In the case of an initiator initiated
1663 * sync negotiation, we limit based on the user
1664 * setting. This allows the system to still accept
1665 * incoming negotiations even if target initiated
1666 * negotiation is not performed.
1667 */
1668 if (role == ROLE_TARGET)
1669 transinfo = &tinfo->user;
1670 else
1671 transinfo = &tinfo->goal;
1672 *ppr_options &= transinfo->ppr_options;
1673 if (transinfo->width == MSG_EXT_WDTR_BUS_8_BIT) {
1674 maxsync = max(maxsync, (u_int)AHC_SYNCRATE_ULTRA2);
1675 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1676 }
1677 if (transinfo->period == 0) {
1678 *period = 0;
1679 *ppr_options = 0;
1680 return (NULL);
1681 }
1682 *period = max(*period, (u_int)transinfo->period);
1683 return (ahc_find_syncrate(ahc, period, ppr_options, maxsync));
1684 }
1685
1686 /*
1687 * Look up the valid period to SCSIRATE conversion in our table.
1688 * Return the period and offset that should be sent to the target
1689 * if this was the beginning of an SDTR.
1690 */
1691 struct ahc_syncrate *
1692 ahc_find_syncrate(struct ahc_softc *ahc, u_int *period,
1693 u_int *ppr_options, u_int maxsync)
1694 {
1695 struct ahc_syncrate *syncrate;
1696
1697 if ((ahc->features & AHC_DT) == 0)
1698 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1699
1700 /* Skip all DT only entries if DT is not available */
1701 if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0
1702 && maxsync < AHC_SYNCRATE_ULTRA2)
1703 maxsync = AHC_SYNCRATE_ULTRA2;
1704
1705 for (syncrate = &ahc_syncrates[maxsync];
1706 syncrate->rate != NULL;
1707 syncrate++) {
1708
1709 /*
1710 * The Ultra2 table doesn't go as low
1711 * as for the Fast/Ultra cards.
1712 */
1713 if ((ahc->features & AHC_ULTRA2) != 0
1714 && (syncrate->sxfr_u2 == 0))
1715 break;
1716
1717 if (*period <= syncrate->period) {
1718 /*
1719 * When responding to a target that requests
1720 * sync, the requested rate may fall between
1721 * two rates that we can output, but still be
1722 * a rate that we can receive. Because of this,
1723 * we want to respond to the target with
1724 * the same rate that it sent to us even
1725 * if the period we use to send data to it
1726 * is lower. Only lower the response period
1727 * if we must.
1728 */
1729 if (syncrate == &ahc_syncrates[maxsync])
1730 *period = syncrate->period;
1731
1732 /*
1733 * At some speeds, we only support
1734 * ST transfers.
1735 */
1736 if ((syncrate->sxfr_u2 & ST_SXFR) != 0)
1737 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1738 break;
1739 }
1740 }
1741
1742 if ((*period == 0)
1743 || (syncrate->rate == NULL)
1744 || ((ahc->features & AHC_ULTRA2) != 0
1745 && (syncrate->sxfr_u2 == 0))) {
1746 /* Use asynchronous transfers. */
1747 *period = 0;
1748 syncrate = NULL;
1749 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1750 }
1751 return (syncrate);
1752 }
1753
1754 /*
1755 * Convert from an entry in our syncrate table to the SCSI equivalent
1756 * sync "period" factor.
1757 */
1758 u_int
1759 ahc_find_period(struct ahc_softc *ahc, u_int scsirate, u_int maxsync)
1760 {
1761 struct ahc_syncrate *syncrate;
1762
1763 if ((ahc->features & AHC_ULTRA2) != 0)
1764 scsirate &= SXFR_ULTRA2;
1765 else
1766 scsirate &= SXFR;
1767
1768 syncrate = &ahc_syncrates[maxsync];
1769 while (syncrate->rate != NULL) {
1770
1771 if ((ahc->features & AHC_ULTRA2) != 0) {
1772 if (syncrate->sxfr_u2 == 0)
1773 break;
1774 else if (scsirate == (syncrate->sxfr_u2 & SXFR_ULTRA2))
1775 return (syncrate->period);
1776 } else if (scsirate == (syncrate->sxfr & SXFR)) {
1777 return (syncrate->period);
1778 }
1779 syncrate++;
1780 }
1781 return (0); /* async */
1782 }
1783
1784 /*
1785 * Truncate the given synchronous offset to a value the
1786 * current adapter type and syncrate are capable of.
1787 */
1788 void
1789 ahc_validate_offset(struct ahc_softc *ahc,
1790 struct ahc_initiator_tinfo *tinfo,
1791 struct ahc_syncrate *syncrate,
1792 u_int *offset, int wide, role_t role)
1793 {
1794 u_int maxoffset;
1795
1796 /* Limit offset to what we can do */
1797 if (syncrate == NULL) {
1798 maxoffset = 0;
1799 } else if ((ahc->features & AHC_ULTRA2) != 0) {
1800 maxoffset = MAX_OFFSET_ULTRA2;
1801 } else {
1802 if (wide)
1803 maxoffset = MAX_OFFSET_16BIT;
1804 else
1805 maxoffset = MAX_OFFSET_8BIT;
1806 }
1807 *offset = min(*offset, maxoffset);
1808 if (tinfo != NULL) {
1809 if (role == ROLE_TARGET)
1810 *offset = min(*offset, (u_int)tinfo->user.offset);
1811 else
1812 *offset = min(*offset, (u_int)tinfo->goal.offset);
1813 }
1814 }
1815
1816 /*
1817 * Truncate the given transfer width parameter to a value the
1818 * current adapter type is capable of.
1819 */
1820 void
1821 ahc_validate_width(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo,
1822 u_int *bus_width, role_t role)
1823 {
1824 switch (*bus_width) {
1825 default:
1826 if (ahc->features & AHC_WIDE) {
1827 /* Respond Wide */
1828 *bus_width = MSG_EXT_WDTR_BUS_16_BIT;
1829 break;
1830 }
1831 /* FALLTHROUGH */
1832 case MSG_EXT_WDTR_BUS_8_BIT:
1833 *bus_width = MSG_EXT_WDTR_BUS_8_BIT;
1834 break;
1835 }
1836 if (tinfo != NULL) {
1837 if (role == ROLE_TARGET)
1838 *bus_width = min((u_int)tinfo->user.width, *bus_width);
1839 else
1840 *bus_width = min((u_int)tinfo->goal.width, *bus_width);
1841 }
1842 }
1843
1844 /*
1845 * Update the bitmask of targets for which the controller should
1846 * negotiate with at the next convenient oportunity. This currently
1847 * means the next time we send the initial identify messages for
1848 * a new transaction.
1849 */
1850 int
1851 ahc_update_neg_request(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1852 struct ahc_tmode_tstate *tstate,
1853 struct ahc_initiator_tinfo *tinfo, ahc_neg_type neg_type)
1854 {
1855 u_int auto_negotiate_orig;
1856
1857 auto_negotiate_orig = tstate->auto_negotiate;
1858 if (neg_type == AHC_NEG_ALWAYS) {
1859 /*
1860 * Force our "current" settings to be
1861 * unknown so that unless a bus reset
1862 * occurs the need to renegotiate is
1863 * recorded persistently.
1864 */
1865 if ((ahc->features & AHC_WIDE) != 0)
1866 tinfo->curr.width = AHC_WIDTH_UNKNOWN;
1867 tinfo->curr.period = AHC_PERIOD_UNKNOWN;
1868 tinfo->curr.offset = AHC_OFFSET_UNKNOWN;
1869 }
1870 if (tinfo->curr.period != tinfo->goal.period
1871 || tinfo->curr.width != tinfo->goal.width
1872 || tinfo->curr.offset != tinfo->goal.offset
1873 || tinfo->curr.ppr_options != tinfo->goal.ppr_options
1874 || (neg_type == AHC_NEG_IF_NON_ASYNC
1875 && (tinfo->goal.offset != 0
1876 || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT
1877 || tinfo->goal.ppr_options != 0)))
1878 tstate->auto_negotiate |= devinfo->target_mask;
1879 else
1880 tstate->auto_negotiate &= ~devinfo->target_mask;
1881
1882 return (auto_negotiate_orig != tstate->auto_negotiate);
1883 }
1884
1885 /*
1886 * Update the user/goal/curr tables of synchronous negotiation
1887 * parameters as well as, in the case of a current or active update,
1888 * any data structures on the host controller. In the case of an
1889 * active update, the specified target is currently talking to us on
1890 * the bus, so the transfer parameter update must take effect
1891 * immediately.
1892 */
1893 void
1894 ahc_set_syncrate(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1895 struct ahc_syncrate *syncrate, u_int period,
1896 u_int offset, u_int ppr_options, u_int type, int paused)
1897 {
1898 struct ahc_initiator_tinfo *tinfo;
1899 struct ahc_tmode_tstate *tstate;
1900 u_int old_period;
1901 u_int old_offset;
1902 u_int old_ppr;
1903 int active;
1904 int update_needed;
1905
1906 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
1907 update_needed = 0;
1908
1909 if (syncrate == NULL) {
1910 period = 0;
1911 offset = 0;
1912 }
1913
1914 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
1915 devinfo->target, &tstate);
1916
1917 if ((type & AHC_TRANS_USER) != 0) {
1918 tinfo->user.period = period;
1919 tinfo->user.offset = offset;
1920 tinfo->user.ppr_options = ppr_options;
1921 }
1922
1923 if ((type & AHC_TRANS_GOAL) != 0) {
1924 tinfo->goal.period = period;
1925 tinfo->goal.offset = offset;
1926 tinfo->goal.ppr_options = ppr_options;
1927 }
1928
1929 old_period = tinfo->curr.period;
1930 old_offset = tinfo->curr.offset;
1931 old_ppr = tinfo->curr.ppr_options;
1932
1933 if ((type & AHC_TRANS_CUR) != 0
1934 && (old_period != period
1935 || old_offset != offset
1936 || old_ppr != ppr_options)) {
1937 u_int scsirate;
1938
1939 update_needed++;
1940 scsirate = tinfo->scsirate;
1941 if ((ahc->features & AHC_ULTRA2) != 0) {
1942
1943 scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC);
1944 if (syncrate != NULL) {
1945 scsirate |= syncrate->sxfr_u2;
1946 if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0)
1947 scsirate |= ENABLE_CRC;
1948 else
1949 scsirate |= SINGLE_EDGE;
1950 }
1951 } else {
1952
1953 scsirate &= ~(SXFR|SOFS);
1954 /*
1955 * Ensure Ultra mode is set properly for
1956 * this target.
1957 */
1958 tstate->ultraenb &= ~devinfo->target_mask;
1959 if (syncrate != NULL) {
1960 if (syncrate->sxfr & ULTRA_SXFR) {
1961 tstate->ultraenb |=
1962 devinfo->target_mask;
1963 }
1964 scsirate |= syncrate->sxfr & SXFR;
1965 scsirate |= offset & SOFS;
1966 }
1967 if (active) {
1968 u_int sxfrctl0;
1969
1970 sxfrctl0 = ahc_inb(ahc, SXFRCTL0);
1971 sxfrctl0 &= ~FAST20;
1972 if (tstate->ultraenb & devinfo->target_mask)
1973 sxfrctl0 |= FAST20;
1974 ahc_outb(ahc, SXFRCTL0, sxfrctl0);
1975 }
1976 }
1977 if (active) {
1978 ahc_outb(ahc, SCSIRATE, scsirate);
1979 if ((ahc->features & AHC_ULTRA2) != 0)
1980 ahc_outb(ahc, SCSIOFFSET, offset);
1981 }
1982
1983 tinfo->scsirate = scsirate;
1984 tinfo->curr.period = period;
1985 tinfo->curr.offset = offset;
1986 tinfo->curr.ppr_options = ppr_options;
1987
1988 ahc_send_async(ahc, devinfo->channel, devinfo->target,
1989 CAM_LUN_WILDCARD, AC_TRANSFER_NEG);
1990 if (bootverbose) {
1991 if (offset != 0) {
1992 printf("%s: target %d synchronous at %sMHz%s, "
1993 "offset = 0x%x\n", ahc_name(ahc),
1994 devinfo->target, syncrate->rate,
1995 (ppr_options & MSG_EXT_PPR_DT_REQ)
1996 ? " DT" : "", offset);
1997 } else {
1998 printf("%s: target %d using "
1999 "asynchronous transfers\n",
2000 ahc_name(ahc), devinfo->target);
2001 }
2002 }
2003 }
2004
2005 update_needed += ahc_update_neg_request(ahc, devinfo, tstate,
2006 tinfo, AHC_NEG_TO_GOAL);
2007
2008 if (update_needed)
2009 ahc_update_pending_scbs(ahc);
2010 }
2011
2012 /*
2013 * Update the user/goal/curr tables of wide negotiation
2014 * parameters as well as, in the case of a current or active update,
2015 * any data structures on the host controller. In the case of an
2016 * active update, the specified target is currently talking to us on
2017 * the bus, so the transfer parameter update must take effect
2018 * immediately.
2019 */
2020 void
2021 ahc_set_width(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2022 u_int width, u_int type, int paused)
2023 {
2024 struct ahc_initiator_tinfo *tinfo;
2025 struct ahc_tmode_tstate *tstate;
2026 u_int oldwidth;
2027 int active;
2028 int update_needed;
2029
2030 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
2031 update_needed = 0;
2032 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
2033 devinfo->target, &tstate);
2034
2035 if ((type & AHC_TRANS_USER) != 0)
2036 tinfo->user.width = width;
2037
2038 if ((type & AHC_TRANS_GOAL) != 0)
2039 tinfo->goal.width = width;
2040
2041 oldwidth = tinfo->curr.width;
2042 if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) {
2043 u_int scsirate;
2044
2045 update_needed++;
2046 scsirate = tinfo->scsirate;
2047 scsirate &= ~WIDEXFER;
2048 if (width == MSG_EXT_WDTR_BUS_16_BIT)
2049 scsirate |= WIDEXFER;
2050
2051 tinfo->scsirate = scsirate;
2052
2053 if (active)
2054 ahc_outb(ahc, SCSIRATE, scsirate);
2055
2056 tinfo->curr.width = width;
2057
2058 ahc_send_async(ahc, devinfo->channel, devinfo->target,
2059 CAM_LUN_WILDCARD, AC_TRANSFER_NEG);
2060 if (bootverbose) {
2061 printf("%s: target %d using %dbit transfers\n",
2062 ahc_name(ahc), devinfo->target,
2063 8 * (0x01 << width));
2064 }
2065 }
2066
2067 update_needed += ahc_update_neg_request(ahc, devinfo, tstate,
2068 tinfo, AHC_NEG_TO_GOAL);
2069 if (update_needed)
2070 ahc_update_pending_scbs(ahc);
2071 }
2072
2073 /*
2074 * Update the current state of tagged queuing for a given target.
2075 */
2076 void
2077 ahc_set_tags(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
2078 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
2079 {
2080 struct scsi_device *sdev = cmd->device;
2081
2082 ahc_platform_set_tags(ahc, sdev, devinfo, alg);
2083 ahc_send_async(ahc, devinfo->channel, devinfo->target,
2084 devinfo->lun, AC_TRANSFER_NEG);
2085 }
2086
2087 /*
2088 * When the transfer settings for a connection change, update any
2089 * in-transit SCBs to contain the new data so the hardware will
2090 * be set correctly during future (re)selections.
2091 */
2092 static void
2093 ahc_update_pending_scbs(struct ahc_softc *ahc)
2094 {
2095 struct scb *pending_scb;
2096 int pending_scb_count;
2097 int i;
2098 int paused;
2099 u_int saved_scbptr;
2100
2101 /*
2102 * Traverse the pending SCB list and ensure that all of the
2103 * SCBs there have the proper settings.
2104 */
2105 pending_scb_count = 0;
2106 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2107 struct ahc_devinfo devinfo;
2108 struct hardware_scb *pending_hscb;
2109 struct ahc_initiator_tinfo *tinfo;
2110 struct ahc_tmode_tstate *tstate;
2111
2112 ahc_scb_devinfo(ahc, &devinfo, pending_scb);
2113 tinfo = ahc_fetch_transinfo(ahc, devinfo.channel,
2114 devinfo.our_scsiid,
2115 devinfo.target, &tstate);
2116 pending_hscb = pending_scb->hscb;
2117 pending_hscb->control &= ~ULTRAENB;
2118 if ((tstate->ultraenb & devinfo.target_mask) != 0)
2119 pending_hscb->control |= ULTRAENB;
2120 pending_hscb->scsirate = tinfo->scsirate;
2121 pending_hscb->scsioffset = tinfo->curr.offset;
2122 if ((tstate->auto_negotiate & devinfo.target_mask) == 0
2123 && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) {
2124 pending_scb->flags &= ~SCB_AUTO_NEGOTIATE;
2125 pending_hscb->control &= ~MK_MESSAGE;
2126 }
2127 ahc_sync_scb(ahc, pending_scb,
2128 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
2129 pending_scb_count++;
2130 }
2131
2132 if (pending_scb_count == 0)
2133 return;
2134
2135 if (ahc_is_paused(ahc)) {
2136 paused = 1;
2137 } else {
2138 paused = 0;
2139 ahc_pause(ahc);
2140 }
2141
2142 saved_scbptr = ahc_inb(ahc, SCBPTR);
2143 /* Ensure that the hscbs down on the card match the new information */
2144 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
2145 struct hardware_scb *pending_hscb;
2146 u_int control;
2147 u_int scb_tag;
2148
2149 ahc_outb(ahc, SCBPTR, i);
2150 scb_tag = ahc_inb(ahc, SCB_TAG);
2151 pending_scb = ahc_lookup_scb(ahc, scb_tag);
2152 if (pending_scb == NULL)
2153 continue;
2154
2155 pending_hscb = pending_scb->hscb;
2156 control = ahc_inb(ahc, SCB_CONTROL);
2157 control &= ~(ULTRAENB|MK_MESSAGE);
2158 control |= pending_hscb->control & (ULTRAENB|MK_MESSAGE);
2159 ahc_outb(ahc, SCB_CONTROL, control);
2160 ahc_outb(ahc, SCB_SCSIRATE, pending_hscb->scsirate);
2161 ahc_outb(ahc, SCB_SCSIOFFSET, pending_hscb->scsioffset);
2162 }
2163 ahc_outb(ahc, SCBPTR, saved_scbptr);
2164
2165 if (paused == 0)
2166 ahc_unpause(ahc);
2167 }
2168
2169 /**************************** Pathing Information *****************************/
2170 static void
2171 ahc_fetch_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2172 {
2173 u_int saved_scsiid;
2174 role_t role;
2175 int our_id;
2176
2177 if (ahc_inb(ahc, SSTAT0) & TARGET)
2178 role = ROLE_TARGET;
2179 else
2180 role = ROLE_INITIATOR;
2181
2182 if (role == ROLE_TARGET
2183 && (ahc->features & AHC_MULTI_TID) != 0
2184 && (ahc_inb(ahc, SEQ_FLAGS)
2185 & (CMDPHASE_PENDING|TARG_CMD_PENDING|NO_DISCONNECT)) != 0) {
2186 /* We were selected, so pull our id from TARGIDIN */
2187 our_id = ahc_inb(ahc, TARGIDIN) & OID;
2188 } else if ((ahc->features & AHC_ULTRA2) != 0)
2189 our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID;
2190 else
2191 our_id = ahc_inb(ahc, SCSIID) & OID;
2192
2193 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2194 ahc_compile_devinfo(devinfo,
2195 our_id,
2196 SCSIID_TARGET(ahc, saved_scsiid),
2197 ahc_inb(ahc, SAVED_LUN),
2198 SCSIID_CHANNEL(ahc, saved_scsiid),
2199 role);
2200 }
2201
2202 struct ahc_phase_table_entry*
2203 ahc_lookup_phase_entry(int phase)
2204 {
2205 struct ahc_phase_table_entry *entry;
2206 struct ahc_phase_table_entry *last_entry;
2207
2208 /*
2209 * num_phases doesn't include the default entry which
2210 * will be returned if the phase doesn't match.
2211 */
2212 last_entry = &ahc_phase_table[num_phases];
2213 for (entry = ahc_phase_table; entry < last_entry; entry++) {
2214 if (phase == entry->phase)
2215 break;
2216 }
2217 return (entry);
2218 }
2219
2220 void
2221 ahc_compile_devinfo(struct ahc_devinfo *devinfo, u_int our_id, u_int target,
2222 u_int lun, char channel, role_t role)
2223 {
2224 devinfo->our_scsiid = our_id;
2225 devinfo->target = target;
2226 devinfo->lun = lun;
2227 devinfo->target_offset = target;
2228 devinfo->channel = channel;
2229 devinfo->role = role;
2230 if (channel == 'B')
2231 devinfo->target_offset += 8;
2232 devinfo->target_mask = (0x01 << devinfo->target_offset);
2233 }
2234
2235 void
2236 ahc_print_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2237 {
2238 printf("%s:%c:%d:%d: ", ahc_name(ahc), devinfo->channel,
2239 devinfo->target, devinfo->lun);
2240 }
2241
2242 static void
2243 ahc_scb_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2244 struct scb *scb)
2245 {
2246 role_t role;
2247 int our_id;
2248
2249 our_id = SCSIID_OUR_ID(scb->hscb->scsiid);
2250 role = ROLE_INITIATOR;
2251 if ((scb->flags & SCB_TARGET_SCB) != 0)
2252 role = ROLE_TARGET;
2253 ahc_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahc, scb),
2254 SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahc, scb), role);
2255 }
2256
2257
2258 /************************ Message Phase Processing ****************************/
2259 static void
2260 ahc_assert_atn(struct ahc_softc *ahc)
2261 {
2262 u_int scsisigo;
2263
2264 scsisigo = ATNO;
2265 if ((ahc->features & AHC_DT) == 0)
2266 scsisigo |= ahc_inb(ahc, SCSISIGI);
2267 ahc_outb(ahc, SCSISIGO, scsisigo);
2268 }
2269
2270 /*
2271 * When an initiator transaction with the MK_MESSAGE flag either reconnects
2272 * or enters the initial message out phase, we are interrupted. Fill our
2273 * outgoing message buffer with the appropriate message and beging handing
2274 * the message phase(s) manually.
2275 */
2276 static void
2277 ahc_setup_initiator_msgout(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2278 struct scb *scb)
2279 {
2280 /*
2281 * To facilitate adding multiple messages together,
2282 * each routine should increment the index and len
2283 * variables instead of setting them explicitly.
2284 */
2285 ahc->msgout_index = 0;
2286 ahc->msgout_len = 0;
2287
2288 if ((scb->flags & SCB_DEVICE_RESET) == 0
2289 && ahc_inb(ahc, MSG_OUT) == MSG_IDENTIFYFLAG) {
2290 u_int identify_msg;
2291
2292 identify_msg = MSG_IDENTIFYFLAG | SCB_GET_LUN(scb);
2293 if ((scb->hscb->control & DISCENB) != 0)
2294 identify_msg |= MSG_IDENTIFY_DISCFLAG;
2295 ahc->msgout_buf[ahc->msgout_index++] = identify_msg;
2296 ahc->msgout_len++;
2297
2298 if ((scb->hscb->control & TAG_ENB) != 0) {
2299 ahc->msgout_buf[ahc->msgout_index++] =
2300 scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE);
2301 ahc->msgout_buf[ahc->msgout_index++] = scb->hscb->tag;
2302 ahc->msgout_len += 2;
2303 }
2304 }
2305
2306 if (scb->flags & SCB_DEVICE_RESET) {
2307 ahc->msgout_buf[ahc->msgout_index++] = MSG_BUS_DEV_RESET;
2308 ahc->msgout_len++;
2309 ahc_print_path(ahc, scb);
2310 printf("Bus Device Reset Message Sent\n");
2311 /*
2312 * Clear our selection hardware in advance of
2313 * the busfree. We may have an entry in the waiting
2314 * Q for this target, and we don't want to go about
2315 * selecting while we handle the busfree and blow it
2316 * away.
2317 */
2318 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
2319 } else if ((scb->flags & SCB_ABORT) != 0) {
2320 if ((scb->hscb->control & TAG_ENB) != 0)
2321 ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT_TAG;
2322 else
2323 ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT;
2324 ahc->msgout_len++;
2325 ahc_print_path(ahc, scb);
2326 printf("Abort%s Message Sent\n",
2327 (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : "");
2328 /*
2329 * Clear our selection hardware in advance of
2330 * the busfree. We may have an entry in the waiting
2331 * Q for this target, and we don't want to go about
2332 * selecting while we handle the busfree and blow it
2333 * away.
2334 */
2335 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
2336 } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) {
2337 ahc_build_transfer_msg(ahc, devinfo);
2338 } else {
2339 printf("ahc_intr: AWAITING_MSG for an SCB that "
2340 "does not have a waiting message\n");
2341 printf("SCSIID = %x, target_mask = %x\n", scb->hscb->scsiid,
2342 devinfo->target_mask);
2343 panic("SCB = %d, SCB Control = %x, MSG_OUT = %x "
2344 "SCB flags = %x", scb->hscb->tag, scb->hscb->control,
2345 ahc_inb(ahc, MSG_OUT), scb->flags);
2346 }
2347
2348 /*
2349 * Clear the MK_MESSAGE flag from the SCB so we aren't
2350 * asked to send this message again.
2351 */
2352 ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL) & ~MK_MESSAGE);
2353 scb->hscb->control &= ~MK_MESSAGE;
2354 ahc->msgout_index = 0;
2355 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2356 }
2357
2358 /*
2359 * Build an appropriate transfer negotiation message for the
2360 * currently active target.
2361 */
2362 static void
2363 ahc_build_transfer_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2364 {
2365 /*
2366 * We need to initiate transfer negotiations.
2367 * If our current and goal settings are identical,
2368 * we want to renegotiate due to a check condition.
2369 */
2370 struct ahc_initiator_tinfo *tinfo;
2371 struct ahc_tmode_tstate *tstate;
2372 struct ahc_syncrate *rate;
2373 int dowide;
2374 int dosync;
2375 int doppr;
2376 u_int period;
2377 u_int ppr_options;
2378 u_int offset;
2379
2380 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
2381 devinfo->target, &tstate);
2382 /*
2383 * Filter our period based on the current connection.
2384 * If we can't perform DT transfers on this segment (not in LVD
2385 * mode for instance), then our decision to issue a PPR message
2386 * may change.
2387 */
2388 period = tinfo->goal.period;
2389 offset = tinfo->goal.offset;
2390 ppr_options = tinfo->goal.ppr_options;
2391 /* Target initiated PPR is not allowed in the SCSI spec */
2392 if (devinfo->role == ROLE_TARGET)
2393 ppr_options = 0;
2394 rate = ahc_devlimited_syncrate(ahc, tinfo, &period,
2395 &ppr_options, devinfo->role);
2396 dowide = tinfo->curr.width != tinfo->goal.width;
2397 dosync = tinfo->curr.offset != offset || tinfo->curr.period != period;
2398 /*
2399 * Only use PPR if we have options that need it, even if the device
2400 * claims to support it. There might be an expander in the way
2401 * that doesn't.
2402 */
2403 doppr = ppr_options != 0;
2404
2405 if (!dowide && !dosync && !doppr) {
2406 dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT;
2407 dosync = tinfo->goal.offset != 0;
2408 }
2409
2410 if (!dowide && !dosync && !doppr) {
2411 /*
2412 * Force async with a WDTR message if we have a wide bus,
2413 * or just issue an SDTR with a 0 offset.
2414 */
2415 if ((ahc->features & AHC_WIDE) != 0)
2416 dowide = 1;
2417 else
2418 dosync = 1;
2419
2420 if (bootverbose) {
2421 ahc_print_devinfo(ahc, devinfo);
2422 printf("Ensuring async\n");
2423 }
2424 }
2425
2426 /* Target initiated PPR is not allowed in the SCSI spec */
2427 if (devinfo->role == ROLE_TARGET)
2428 doppr = 0;
2429
2430 /*
2431 * Both the PPR message and SDTR message require the
2432 * goal syncrate to be limited to what the target device
2433 * is capable of handling (based on whether an LVD->SE
2434 * expander is on the bus), so combine these two cases.
2435 * Regardless, guarantee that if we are using WDTR and SDTR
2436 * messages that WDTR comes first.
2437 */
2438 if (doppr || (dosync && !dowide)) {
2439
2440 offset = tinfo->goal.offset;
2441 ahc_validate_offset(ahc, tinfo, rate, &offset,
2442 doppr ? tinfo->goal.width
2443 : tinfo->curr.width,
2444 devinfo->role);
2445 if (doppr) {
2446 ahc_construct_ppr(ahc, devinfo, period, offset,
2447 tinfo->goal.width, ppr_options);
2448 } else {
2449 ahc_construct_sdtr(ahc, devinfo, period, offset);
2450 }
2451 } else {
2452 ahc_construct_wdtr(ahc, devinfo, tinfo->goal.width);
2453 }
2454 }
2455
2456 /*
2457 * Build a synchronous negotiation message in our message
2458 * buffer based on the input parameters.
2459 */
2460 static void
2461 ahc_construct_sdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2462 u_int period, u_int offset)
2463 {
2464 if (offset == 0)
2465 period = AHC_ASYNC_XFER_PERIOD;
2466 ahc->msgout_index += spi_populate_sync_msg(
2467 ahc->msgout_buf + ahc->msgout_index, period, offset);
2468 ahc->msgout_len += 5;
2469 if (bootverbose) {
2470 printf("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n",
2471 ahc_name(ahc), devinfo->channel, devinfo->target,
2472 devinfo->lun, period, offset);
2473 }
2474 }
2475
2476 /*
2477 * Build a wide negotiation message in our message
2478 * buffer based on the input parameters.
2479 */
2480 static void
2481 ahc_construct_wdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2482 u_int bus_width)
2483 {
2484 ahc->msgout_index += spi_populate_width_msg(
2485 ahc->msgout_buf + ahc->msgout_index, bus_width);
2486 ahc->msgout_len += 4;
2487 if (bootverbose) {
2488 printf("(%s:%c:%d:%d): Sending WDTR %x\n",
2489 ahc_name(ahc), devinfo->channel, devinfo->target,
2490 devinfo->lun, bus_width);
2491 }
2492 }
2493
2494 /*
2495 * Build a parallel protocol request message in our message
2496 * buffer based on the input parameters.
2497 */
2498 static void
2499 ahc_construct_ppr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2500 u_int period, u_int offset, u_int bus_width,
2501 u_int ppr_options)
2502 {
2503 if (offset == 0)
2504 period = AHC_ASYNC_XFER_PERIOD;
2505 ahc->msgout_index += spi_populate_ppr_msg(
2506 ahc->msgout_buf + ahc->msgout_index, period, offset,
2507 bus_width, ppr_options);
2508 ahc->msgout_len += 8;
2509 if (bootverbose) {
2510 printf("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, "
2511 "offset %x, ppr_options %x\n", ahc_name(ahc),
2512 devinfo->channel, devinfo->target, devinfo->lun,
2513 bus_width, period, offset, ppr_options);
2514 }
2515 }
2516
2517 /*
2518 * Clear any active message state.
2519 */
2520 static void
2521 ahc_clear_msg_state(struct ahc_softc *ahc)
2522 {
2523 ahc->msgout_len = 0;
2524 ahc->msgin_index = 0;
2525 ahc->msg_type = MSG_TYPE_NONE;
2526 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0) {
2527 /*
2528 * The target didn't care to respond to our
2529 * message request, so clear ATN.
2530 */
2531 ahc_outb(ahc, CLRSINT1, CLRATNO);
2532 }
2533 ahc_outb(ahc, MSG_OUT, MSG_NOOP);
2534 ahc_outb(ahc, SEQ_FLAGS2,
2535 ahc_inb(ahc, SEQ_FLAGS2) & ~TARGET_MSG_PENDING);
2536 }
2537
2538 static void
2539 ahc_handle_proto_violation(struct ahc_softc *ahc)
2540 {
2541 struct ahc_devinfo devinfo;
2542 struct scb *scb;
2543 u_int scbid;
2544 u_int seq_flags;
2545 u_int curphase;
2546 u_int lastphase;
2547 int found;
2548
2549 ahc_fetch_devinfo(ahc, &devinfo);
2550 scbid = ahc_inb(ahc, SCB_TAG);
2551 scb = ahc_lookup_scb(ahc, scbid);
2552 seq_flags = ahc_inb(ahc, SEQ_FLAGS);
2553 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
2554 lastphase = ahc_inb(ahc, LASTPHASE);
2555 if ((seq_flags & NOT_IDENTIFIED) != 0) {
2556
2557 /*
2558 * The reconnecting target either did not send an
2559 * identify message, or did, but we didn't find an SCB
2560 * to match.
2561 */
2562 ahc_print_devinfo(ahc, &devinfo);
2563 printf("Target did not send an IDENTIFY message. "
2564 "LASTPHASE = 0x%x.\n", lastphase);
2565 scb = NULL;
2566 } else if (scb == NULL) {
2567 /*
2568 * We don't seem to have an SCB active for this
2569 * transaction. Print an error and reset the bus.
2570 */
2571 ahc_print_devinfo(ahc, &devinfo);
2572 printf("No SCB found during protocol violation\n");
2573 goto proto_violation_reset;
2574 } else {
2575 ahc_set_transaction_status(scb, CAM_SEQUENCE_FAIL);
2576 if ((seq_flags & NO_CDB_SENT) != 0) {
2577 ahc_print_path(ahc, scb);
2578 printf("No or incomplete CDB sent to device.\n");
2579 } else if ((ahc_inb(ahc, SCB_CONTROL) & STATUS_RCVD) == 0) {
2580 /*
2581 * The target never bothered to provide status to
2582 * us prior to completing the command. Since we don't
2583 * know the disposition of this command, we must attempt
2584 * to abort it. Assert ATN and prepare to send an abort
2585 * message.
2586 */
2587 ahc_print_path(ahc, scb);
2588 printf("Completed command without status.\n");
2589 } else {
2590 ahc_print_path(ahc, scb);
2591 printf("Unknown protocol violation.\n");
2592 ahc_dump_card_state(ahc);
2593 }
2594 }
2595 if ((lastphase & ~P_DATAIN_DT) == 0
2596 || lastphase == P_COMMAND) {
2597 proto_violation_reset:
2598 /*
2599 * Target either went directly to data/command
2600 * phase or didn't respond to our ATN.
2601 * The only safe thing to do is to blow
2602 * it away with a bus reset.
2603 */
2604 found = ahc_reset_channel(ahc, 'A', TRUE);
2605 printf("%s: Issued Channel %c Bus Reset. "
2606 "%d SCBs aborted\n", ahc_name(ahc), 'A', found);
2607 } else {
2608 /*
2609 * Leave the selection hardware off in case
2610 * this abort attempt will affect yet to
2611 * be sent commands.
2612 */
2613 ahc_outb(ahc, SCSISEQ,
2614 ahc_inb(ahc, SCSISEQ) & ~ENSELO);
2615 ahc_assert_atn(ahc);
2616 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2617 if (scb == NULL) {
2618 ahc_print_devinfo(ahc, &devinfo);
2619 ahc->msgout_buf[0] = MSG_ABORT_TASK;
2620 ahc->msgout_len = 1;
2621 ahc->msgout_index = 0;
2622 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2623 } else {
2624 ahc_print_path(ahc, scb);
2625 scb->flags |= SCB_ABORT;
2626 }
2627 printf("Protocol violation %s. Attempting to abort.\n",
2628 ahc_lookup_phase_entry(curphase)->phasemsg);
2629 }
2630 }
2631
2632 /*
2633 * Manual message loop handler.
2634 */
2635 static void
2636 ahc_handle_message_phase(struct ahc_softc *ahc)
2637 {
2638 struct ahc_devinfo devinfo;
2639 u_int bus_phase;
2640 int end_session;
2641
2642 ahc_fetch_devinfo(ahc, &devinfo);
2643 end_session = FALSE;
2644 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
2645
2646 reswitch:
2647 switch (ahc->msg_type) {
2648 case MSG_TYPE_INITIATOR_MSGOUT:
2649 {
2650 int lastbyte;
2651 int phasemis;
2652 int msgdone;
2653
2654 if (ahc->msgout_len == 0)
2655 panic("HOST_MSG_LOOP interrupt with no active message");
2656
2657 #ifdef AHC_DEBUG
2658 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2659 ahc_print_devinfo(ahc, &devinfo);
2660 printf("INITIATOR_MSG_OUT");
2661 }
2662 #endif
2663 phasemis = bus_phase != P_MESGOUT;
2664 if (phasemis) {
2665 #ifdef AHC_DEBUG
2666 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2667 printf(" PHASEMIS %s\n",
2668 ahc_lookup_phase_entry(bus_phase)
2669 ->phasemsg);
2670 }
2671 #endif
2672 if (bus_phase == P_MESGIN) {
2673 /*
2674 * Change gears and see if
2675 * this messages is of interest to
2676 * us or should be passed back to
2677 * the sequencer.
2678 */
2679 ahc_outb(ahc, CLRSINT1, CLRATNO);
2680 ahc->send_msg_perror = FALSE;
2681 ahc->msg_type = MSG_TYPE_INITIATOR_MSGIN;
2682 ahc->msgin_index = 0;
2683 goto reswitch;
2684 }
2685 end_session = TRUE;
2686 break;
2687 }
2688
2689 if (ahc->send_msg_perror) {
2690 ahc_outb(ahc, CLRSINT1, CLRATNO);
2691 ahc_outb(ahc, CLRSINT1, CLRREQINIT);
2692 #ifdef AHC_DEBUG
2693 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2694 printf(" byte 0x%x\n", ahc->send_msg_perror);
2695 #endif
2696 ahc_outb(ahc, SCSIDATL, MSG_PARITY_ERROR);
2697 break;
2698 }
2699
2700 msgdone = ahc->msgout_index == ahc->msgout_len;
2701 if (msgdone) {
2702 /*
2703 * The target has requested a retry.
2704 * Re-assert ATN, reset our message index to
2705 * 0, and try again.
2706 */
2707 ahc->msgout_index = 0;
2708 ahc_assert_atn(ahc);
2709 }
2710
2711 lastbyte = ahc->msgout_index == (ahc->msgout_len - 1);
2712 if (lastbyte) {
2713 /* Last byte is signified by dropping ATN */
2714 ahc_outb(ahc, CLRSINT1, CLRATNO);
2715 }
2716
2717 /*
2718 * Clear our interrupt status and present
2719 * the next byte on the bus.
2720 */
2721 ahc_outb(ahc, CLRSINT1, CLRREQINIT);
2722 #ifdef AHC_DEBUG
2723 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2724 printf(" byte 0x%x\n",
2725 ahc->msgout_buf[ahc->msgout_index]);
2726 #endif
2727 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]);
2728 break;
2729 }
2730 case MSG_TYPE_INITIATOR_MSGIN:
2731 {
2732 int phasemis;
2733 int message_done;
2734
2735 #ifdef AHC_DEBUG
2736 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2737 ahc_print_devinfo(ahc, &devinfo);
2738 printf("INITIATOR_MSG_IN");
2739 }
2740 #endif
2741 phasemis = bus_phase != P_MESGIN;
2742 if (phasemis) {
2743 #ifdef AHC_DEBUG
2744 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2745 printf(" PHASEMIS %s\n",
2746 ahc_lookup_phase_entry(bus_phase)
2747 ->phasemsg);
2748 }
2749 #endif
2750 ahc->msgin_index = 0;
2751 if (bus_phase == P_MESGOUT
2752 && (ahc->send_msg_perror == TRUE
2753 || (ahc->msgout_len != 0
2754 && ahc->msgout_index == 0))) {
2755 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2756 goto reswitch;
2757 }
2758 end_session = TRUE;
2759 break;
2760 }
2761
2762 /* Pull the byte in without acking it */
2763 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIBUSL);
2764 #ifdef AHC_DEBUG
2765 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2766 printf(" byte 0x%x\n",
2767 ahc->msgin_buf[ahc->msgin_index]);
2768 #endif
2769
2770 message_done = ahc_parse_msg(ahc, &devinfo);
2771
2772 if (message_done) {
2773 /*
2774 * Clear our incoming message buffer in case there
2775 * is another message following this one.
2776 */
2777 ahc->msgin_index = 0;
2778
2779 /*
2780 * If this message illicited a response,
2781 * assert ATN so the target takes us to the
2782 * message out phase.
2783 */
2784 if (ahc->msgout_len != 0) {
2785 #ifdef AHC_DEBUG
2786 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2787 ahc_print_devinfo(ahc, &devinfo);
2788 printf("Asserting ATN for response\n");
2789 }
2790 #endif
2791 ahc_assert_atn(ahc);
2792 }
2793 } else
2794 ahc->msgin_index++;
2795
2796 if (message_done == MSGLOOP_TERMINATED) {
2797 end_session = TRUE;
2798 } else {
2799 /* Ack the byte */
2800 ahc_outb(ahc, CLRSINT1, CLRREQINIT);
2801 ahc_inb(ahc, SCSIDATL);
2802 }
2803 break;
2804 }
2805 case MSG_TYPE_TARGET_MSGIN:
2806 {
2807 int msgdone;
2808 int msgout_request;
2809
2810 if (ahc->msgout_len == 0)
2811 panic("Target MSGIN with no active message");
2812
2813 /*
2814 * If we interrupted a mesgout session, the initiator
2815 * will not know this until our first REQ. So, we
2816 * only honor mesgout requests after we've sent our
2817 * first byte.
2818 */
2819 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0
2820 && ahc->msgout_index > 0)
2821 msgout_request = TRUE;
2822 else
2823 msgout_request = FALSE;
2824
2825 if (msgout_request) {
2826
2827 /*
2828 * Change gears and see if
2829 * this messages is of interest to
2830 * us or should be passed back to
2831 * the sequencer.
2832 */
2833 ahc->msg_type = MSG_TYPE_TARGET_MSGOUT;
2834 ahc_outb(ahc, SCSISIGO, P_MESGOUT | BSYO);
2835 ahc->msgin_index = 0;
2836 /* Dummy read to REQ for first byte */
2837 ahc_inb(ahc, SCSIDATL);
2838 ahc_outb(ahc, SXFRCTL0,
2839 ahc_inb(ahc, SXFRCTL0) | SPIOEN);
2840 break;
2841 }
2842
2843 msgdone = ahc->msgout_index == ahc->msgout_len;
2844 if (msgdone) {
2845 ahc_outb(ahc, SXFRCTL0,
2846 ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
2847 end_session = TRUE;
2848 break;
2849 }
2850
2851 /*
2852 * Present the next byte on the bus.
2853 */
2854 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN);
2855 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]);
2856 break;
2857 }
2858 case MSG_TYPE_TARGET_MSGOUT:
2859 {
2860 int lastbyte;
2861 int msgdone;
2862
2863 /*
2864 * The initiator signals that this is
2865 * the last byte by dropping ATN.
2866 */
2867 lastbyte = (ahc_inb(ahc, SCSISIGI) & ATNI) == 0;
2868
2869 /*
2870 * Read the latched byte, but turn off SPIOEN first
2871 * so that we don't inadvertently cause a REQ for the
2872 * next byte.
2873 */
2874 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
2875 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIDATL);
2876 msgdone = ahc_parse_msg(ahc, &devinfo);
2877 if (msgdone == MSGLOOP_TERMINATED) {
2878 /*
2879 * The message is *really* done in that it caused
2880 * us to go to bus free. The sequencer has already
2881 * been reset at this point, so pull the ejection
2882 * handle.
2883 */
2884 return;
2885 }
2886
2887 ahc->msgin_index++;
2888
2889 /*
2890 * XXX Read spec about initiator dropping ATN too soon
2891 * and use msgdone to detect it.
2892 */
2893 if (msgdone == MSGLOOP_MSGCOMPLETE) {
2894 ahc->msgin_index = 0;
2895
2896 /*
2897 * If this message illicited a response, transition
2898 * to the Message in phase and send it.
2899 */
2900 if (ahc->msgout_len != 0) {
2901 ahc_outb(ahc, SCSISIGO, P_MESGIN | BSYO);
2902 ahc_outb(ahc, SXFRCTL0,
2903 ahc_inb(ahc, SXFRCTL0) | SPIOEN);
2904 ahc->msg_type = MSG_TYPE_TARGET_MSGIN;
2905 ahc->msgin_index = 0;
2906 break;
2907 }
2908 }
2909
2910 if (lastbyte)
2911 end_session = TRUE;
2912 else {
2913 /* Ask for the next byte. */
2914 ahc_outb(ahc, SXFRCTL0,
2915 ahc_inb(ahc, SXFRCTL0) | SPIOEN);
2916 }
2917
2918 break;
2919 }
2920 default:
2921 panic("Unknown REQINIT message type");
2922 }
2923
2924 if (end_session) {
2925 ahc_clear_msg_state(ahc);
2926 ahc_outb(ahc, RETURN_1, EXIT_MSG_LOOP);
2927 } else
2928 ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP);
2929 }
2930
2931 /*
2932 * See if we sent a particular extended message to the target.
2933 * If "full" is true, return true only if the target saw the full
2934 * message. If "full" is false, return true if the target saw at
2935 * least the first byte of the message.
2936 */
2937 static int
2938 ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, u_int msgval, int full)
2939 {
2940 int found;
2941 u_int index;
2942
2943 found = FALSE;
2944 index = 0;
2945
2946 while (index < ahc->msgout_len) {
2947 if (ahc->msgout_buf[index] == MSG_EXTENDED) {
2948 u_int end_index;
2949
2950 end_index = index + 1 + ahc->msgout_buf[index + 1];
2951 if (ahc->msgout_buf[index+2] == msgval
2952 && type == AHCMSG_EXT) {
2953
2954 if (full) {
2955 if (ahc->msgout_index > end_index)
2956 found = TRUE;
2957 } else if (ahc->msgout_index > index)
2958 found = TRUE;
2959 }
2960 index = end_index;
2961 } else if (ahc->msgout_buf[index] >= MSG_SIMPLE_TASK
2962 && ahc->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) {
2963
2964 /* Skip tag type and tag id or residue param*/
2965 index += 2;
2966 } else {
2967 /* Single byte message */
2968 if (type == AHCMSG_1B
2969 && ahc->msgout_buf[index] == msgval
2970 && ahc->msgout_index > index)
2971 found = TRUE;
2972 index++;
2973 }
2974
2975 if (found)
2976 break;
2977 }
2978 return (found);
2979 }
2980
2981 /*
2982 * Wait for a complete incoming message, parse it, and respond accordingly.
2983 */
2984 static int
2985 ahc_parse_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2986 {
2987 struct ahc_initiator_tinfo *tinfo;
2988 struct ahc_tmode_tstate *tstate;
2989 int reject;
2990 int done;
2991 int response;
2992 u_int targ_scsirate;
2993
2994 done = MSGLOOP_IN_PROG;
2995 response = FALSE;
2996 reject = FALSE;
2997 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
2998 devinfo->target, &tstate);
2999 targ_scsirate = tinfo->scsirate;
3000
3001 /*
3002 * Parse as much of the message as is available,
3003 * rejecting it if we don't support it. When
3004 * the entire message is available and has been
3005 * handled, return MSGLOOP_MSGCOMPLETE, indicating
3006 * that we have parsed an entire message.
3007 *
3008 * In the case of extended messages, we accept the length
3009 * byte outright and perform more checking once we know the
3010 * extended message type.
3011 */
3012 switch (ahc->msgin_buf[0]) {
3013 case MSG_DISCONNECT:
3014 case MSG_SAVEDATAPOINTER:
3015 case MSG_CMDCOMPLETE:
3016 case MSG_RESTOREPOINTERS:
3017 case MSG_IGN_WIDE_RESIDUE:
3018 /*
3019 * End our message loop as these are messages
3020 * the sequencer handles on its own.
3021 */
3022 done = MSGLOOP_TERMINATED;
3023 break;
3024 case MSG_MESSAGE_REJECT:
3025 response = ahc_handle_msg_reject(ahc, devinfo);
3026 /* FALLTHROUGH */
3027 case MSG_NOOP:
3028 done = MSGLOOP_MSGCOMPLETE;
3029 break;
3030 case MSG_EXTENDED:
3031 {
3032 /* Wait for enough of the message to begin validation */
3033 if (ahc->msgin_index < 2)
3034 break;
3035 switch (ahc->msgin_buf[2]) {
3036 case MSG_EXT_SDTR:
3037 {
3038 struct ahc_syncrate *syncrate;
3039 u_int period;
3040 u_int ppr_options;
3041 u_int offset;
3042 u_int saved_offset;
3043
3044 if (ahc->msgin_buf[1] != MSG_EXT_SDTR_LEN) {
3045 reject = TRUE;
3046 break;
3047 }
3048
3049 /*
3050 * Wait until we have both args before validating
3051 * and acting on this message.
3052 *
3053 * Add one to MSG_EXT_SDTR_LEN to account for
3054 * the extended message preamble.
3055 */
3056 if (ahc->msgin_index < (MSG_EXT_SDTR_LEN + 1))
3057 break;
3058
3059 period = ahc->msgin_buf[3];
3060 ppr_options = 0;
3061 saved_offset = offset = ahc->msgin_buf[4];
3062 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period,
3063 &ppr_options,
3064 devinfo->role);
3065 ahc_validate_offset(ahc, tinfo, syncrate, &offset,
3066 targ_scsirate & WIDEXFER,
3067 devinfo->role);
3068 if (bootverbose) {
3069 printf("(%s:%c:%d:%d): Received "
3070 "SDTR period %x, offset %x\n\t"
3071 "Filtered to period %x, offset %x\n",
3072 ahc_name(ahc), devinfo->channel,
3073 devinfo->target, devinfo->lun,
3074 ahc->msgin_buf[3], saved_offset,
3075 period, offset);
3076 }
3077 ahc_set_syncrate(ahc, devinfo,
3078 syncrate, period,
3079 offset, ppr_options,
3080 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3081 /*paused*/TRUE);
3082
3083 /*
3084 * See if we initiated Sync Negotiation
3085 * and didn't have to fall down to async
3086 * transfers.
3087 */
3088 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, TRUE)) {
3089 /* We started it */
3090 if (saved_offset != offset) {
3091 /* Went too low - force async */
3092 reject = TRUE;
3093 }
3094 } else {
3095 /*
3096 * Send our own SDTR in reply
3097 */
3098 if (bootverbose
3099 && devinfo->role == ROLE_INITIATOR) {
3100 printf("(%s:%c:%d:%d): Target "
3101 "Initiated SDTR\n",
3102 ahc_name(ahc), devinfo->channel,
3103 devinfo->target, devinfo->lun);
3104 }
3105 ahc->msgout_index = 0;
3106 ahc->msgout_len = 0;
3107 ahc_construct_sdtr(ahc, devinfo,
3108 period, offset);
3109 ahc->msgout_index = 0;
3110 response = TRUE;
3111 }
3112 done = MSGLOOP_MSGCOMPLETE;
3113 break;
3114 }
3115 case MSG_EXT_WDTR:
3116 {
3117 u_int bus_width;
3118 u_int saved_width;
3119 u_int sending_reply;
3120
3121 sending_reply = FALSE;
3122 if (ahc->msgin_buf[1] != MSG_EXT_WDTR_LEN) {
3123 reject = TRUE;
3124 break;
3125 }
3126
3127 /*
3128 * Wait until we have our arg before validating
3129 * and acting on this message.
3130 *
3131 * Add one to MSG_EXT_WDTR_LEN to account for
3132 * the extended message preamble.
3133 */
3134 if (ahc->msgin_index < (MSG_EXT_WDTR_LEN + 1))
3135 break;
3136
3137 bus_width = ahc->msgin_buf[3];
3138 saved_width = bus_width;
3139 ahc_validate_width(ahc, tinfo, &bus_width,
3140 devinfo->role);
3141 if (bootverbose) {
3142 printf("(%s:%c:%d:%d): Received WDTR "
3143 "%x filtered to %x\n",
3144 ahc_name(ahc), devinfo->channel,
3145 devinfo->target, devinfo->lun,
3146 saved_width, bus_width);
3147 }
3148
3149 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, TRUE)) {
3150 /*
3151 * Don't send a WDTR back to the
3152 * target, since we asked first.
3153 * If the width went higher than our
3154 * request, reject it.
3155 */
3156 if (saved_width > bus_width) {
3157 reject = TRUE;
3158 printf("(%s:%c:%d:%d): requested %dBit "
3159 "transfers. Rejecting...\n",
3160 ahc_name(ahc), devinfo->channel,
3161 devinfo->target, devinfo->lun,
3162 8 * (0x01 << bus_width));
3163 bus_width = 0;
3164 }
3165 } else {
3166 /*
3167 * Send our own WDTR in reply
3168 */
3169 if (bootverbose
3170 && devinfo->role == ROLE_INITIATOR) {
3171 printf("(%s:%c:%d:%d): Target "
3172 "Initiated WDTR\n",
3173 ahc_name(ahc), devinfo->channel,
3174 devinfo->target, devinfo->lun);
3175 }
3176 ahc->msgout_index = 0;
3177 ahc->msgout_len = 0;
3178 ahc_construct_wdtr(ahc, devinfo, bus_width);
3179 ahc->msgout_index = 0;
3180 response = TRUE;
3181 sending_reply = TRUE;
3182 }
3183 /*
3184 * After a wide message, we are async, but
3185 * some devices don't seem to honor this portion
3186 * of the spec. Force a renegotiation of the
3187 * sync component of our transfer agreement even
3188 * if our goal is async. By updating our width
3189 * after forcing the negotiation, we avoid
3190 * renegotiating for width.
3191 */
3192 ahc_update_neg_request(ahc, devinfo, tstate,
3193 tinfo, AHC_NEG_ALWAYS);
3194 ahc_set_width(ahc, devinfo, bus_width,
3195 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3196 /*paused*/TRUE);
3197 if (sending_reply == FALSE && reject == FALSE) {
3198
3199 /*
3200 * We will always have an SDTR to send.
3201 */
3202 ahc->msgout_index = 0;
3203 ahc->msgout_len = 0;
3204 ahc_build_transfer_msg(ahc, devinfo);
3205 ahc->msgout_index = 0;
3206 response = TRUE;
3207 }
3208 done = MSGLOOP_MSGCOMPLETE;
3209 break;
3210 }
3211 case MSG_EXT_PPR:
3212 {
3213 struct ahc_syncrate *syncrate;
3214 u_int period;
3215 u_int offset;
3216 u_int bus_width;
3217 u_int ppr_options;
3218 u_int saved_width;
3219 u_int saved_offset;
3220 u_int saved_ppr_options;
3221
3222 if (ahc->msgin_buf[1] != MSG_EXT_PPR_LEN) {
3223 reject = TRUE;
3224 break;
3225 }
3226
3227 /*
3228 * Wait until we have all args before validating
3229 * and acting on this message.
3230 *
3231 * Add one to MSG_EXT_PPR_LEN to account for
3232 * the extended message preamble.
3233 */
3234 if (ahc->msgin_index < (MSG_EXT_PPR_LEN + 1))
3235 break;
3236
3237 period = ahc->msgin_buf[3];
3238 offset = ahc->msgin_buf[5];
3239 bus_width = ahc->msgin_buf[6];
3240 saved_width = bus_width;
3241 ppr_options = ahc->msgin_buf[7];
3242 /*
3243 * According to the spec, a DT only
3244 * period factor with no DT option
3245 * set implies async.
3246 */
3247 if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0
3248 && period == 9)
3249 offset = 0;
3250 saved_ppr_options = ppr_options;
3251 saved_offset = offset;
3252
3253 /*
3254 * Mask out any options we don't support
3255 * on any controller. Transfer options are
3256 * only available if we are negotiating wide.
3257 */
3258 ppr_options &= MSG_EXT_PPR_DT_REQ;
3259 if (bus_width == 0)
3260 ppr_options = 0;
3261
3262 ahc_validate_width(ahc, tinfo, &bus_width,
3263 devinfo->role);
3264 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period,
3265 &ppr_options,
3266 devinfo->role);
3267 ahc_validate_offset(ahc, tinfo, syncrate,
3268 &offset, bus_width,
3269 devinfo->role);
3270
3271 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, TRUE)) {
3272 /*
3273 * If we are unable to do any of the
3274 * requested options (we went too low),
3275 * then we'll have to reject the message.
3276 */
3277 if (saved_width > bus_width
3278 || saved_offset != offset
3279 || saved_ppr_options != ppr_options) {
3280 reject = TRUE;
3281 period = 0;
3282 offset = 0;
3283 bus_width = 0;
3284 ppr_options = 0;
3285 syncrate = NULL;
3286 }
3287 } else {
3288 if (devinfo->role != ROLE_TARGET)
3289 printf("(%s:%c:%d:%d): Target "
3290 "Initiated PPR\n",
3291 ahc_name(ahc), devinfo->channel,
3292 devinfo->target, devinfo->lun);
3293 else
3294 printf("(%s:%c:%d:%d): Initiator "
3295 "Initiated PPR\n",
3296 ahc_name(ahc), devinfo->channel,
3297 devinfo->target, devinfo->lun);
3298 ahc->msgout_index = 0;
3299 ahc->msgout_len = 0;
3300 ahc_construct_ppr(ahc, devinfo, period, offset,
3301 bus_width, ppr_options);
3302 ahc->msgout_index = 0;
3303 response = TRUE;
3304 }
3305 if (bootverbose) {
3306 printf("(%s:%c:%d:%d): Received PPR width %x, "
3307 "period %x, offset %x,options %x\n"
3308 "\tFiltered to width %x, period %x, "
3309 "offset %x, options %x\n",
3310 ahc_name(ahc), devinfo->channel,
3311 devinfo->target, devinfo->lun,
3312 saved_width, ahc->msgin_buf[3],
3313 saved_offset, saved_ppr_options,
3314 bus_width, period, offset, ppr_options);
3315 }
3316 ahc_set_width(ahc, devinfo, bus_width,
3317 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3318 /*paused*/TRUE);
3319 ahc_set_syncrate(ahc, devinfo,
3320 syncrate, period,
3321 offset, ppr_options,
3322 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3323 /*paused*/TRUE);
3324 done = MSGLOOP_MSGCOMPLETE;
3325 break;
3326 }
3327 default:
3328 /* Unknown extended message. Reject it. */
3329 reject = TRUE;
3330 break;
3331 }
3332 break;
3333 }
3334 #ifdef AHC_TARGET_MODE
3335 case MSG_BUS_DEV_RESET:
3336 ahc_handle_devreset(ahc, devinfo,
3337 CAM_BDR_SENT,
3338 "Bus Device Reset Received",
3339 /*verbose_level*/0);
3340 ahc_restart(ahc);
3341 done = MSGLOOP_TERMINATED;
3342 break;
3343 case MSG_ABORT_TAG:
3344 case MSG_ABORT:
3345 case MSG_CLEAR_QUEUE:
3346 {
3347 int tag;
3348
3349 /* Target mode messages */
3350 if (devinfo->role != ROLE_TARGET) {
3351 reject = TRUE;
3352 break;
3353 }
3354 tag = SCB_LIST_NULL;
3355 if (ahc->msgin_buf[0] == MSG_ABORT_TAG)
3356 tag = ahc_inb(ahc, INITIATOR_TAG);
3357 ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
3358 devinfo->lun, tag, ROLE_TARGET,
3359 CAM_REQ_ABORTED);
3360
3361 tstate = ahc->enabled_targets[devinfo->our_scsiid];
3362 if (tstate != NULL) {
3363 struct ahc_tmode_lstate* lstate;
3364
3365 lstate = tstate->enabled_luns[devinfo->lun];
3366 if (lstate != NULL) {
3367 ahc_queue_lstate_event(ahc, lstate,
3368 devinfo->our_scsiid,
3369 ahc->msgin_buf[0],
3370 /*arg*/tag);
3371 ahc_send_lstate_events(ahc, lstate);
3372 }
3373 }
3374 ahc_restart(ahc);
3375 done = MSGLOOP_TERMINATED;
3376 break;
3377 }
3378 #endif
3379 case MSG_TERM_IO_PROC:
3380 default:
3381 reject = TRUE;
3382 break;
3383 }
3384
3385 if (reject) {
3386 /*
3387 * Setup to reject the message.
3388 */
3389 ahc->msgout_index = 0;
3390 ahc->msgout_len = 1;
3391 ahc->msgout_buf[0] = MSG_MESSAGE_REJECT;
3392 done = MSGLOOP_MSGCOMPLETE;
3393 response = TRUE;
3394 }
3395
3396 if (done != MSGLOOP_IN_PROG && !response)
3397 /* Clear the outgoing message buffer */
3398 ahc->msgout_len = 0;
3399
3400 return (done);
3401 }
3402
3403 /*
3404 * Process a message reject message.
3405 */
3406 static int
3407 ahc_handle_msg_reject(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
3408 {
3409 /*
3410 * What we care about here is if we had an
3411 * outstanding SDTR or WDTR message for this
3412 * target. If we did, this is a signal that
3413 * the target is refusing negotiation.
3414 */
3415 struct scb *scb;
3416 struct ahc_initiator_tinfo *tinfo;
3417 struct ahc_tmode_tstate *tstate;
3418 u_int scb_index;
3419 u_int last_msg;
3420 int response = 0;
3421
3422 scb_index = ahc_inb(ahc, SCB_TAG);
3423 scb = ahc_lookup_scb(ahc, scb_index);
3424 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel,
3425 devinfo->our_scsiid,
3426 devinfo->target, &tstate);
3427 /* Might be necessary */
3428 last_msg = ahc_inb(ahc, LAST_MSG);
3429
3430 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, /*full*/FALSE)) {
3431 /*
3432 * Target does not support the PPR message.
3433 * Attempt to negotiate SPI-2 style.
3434 */
3435 if (bootverbose) {
3436 printf("(%s:%c:%d:%d): PPR Rejected. "
3437 "Trying WDTR/SDTR\n",
3438 ahc_name(ahc), devinfo->channel,
3439 devinfo->target, devinfo->lun);
3440 }
3441 tinfo->goal.ppr_options = 0;
3442 tinfo->curr.transport_version = 2;
3443 tinfo->goal.transport_version = 2;
3444 ahc->msgout_index = 0;
3445 ahc->msgout_len = 0;
3446 ahc_build_transfer_msg(ahc, devinfo);
3447 ahc->msgout_index = 0;
3448 response = 1;
3449 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, /*full*/FALSE)) {
3450
3451 /* note 8bit xfers */
3452 printf("(%s:%c:%d:%d): refuses WIDE negotiation. Using "
3453 "8bit transfers\n", ahc_name(ahc),
3454 devinfo->channel, devinfo->target, devinfo->lun);
3455 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
3456 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3457 /*paused*/TRUE);
3458 /*
3459 * No need to clear the sync rate. If the target
3460 * did not accept the command, our syncrate is
3461 * unaffected. If the target started the negotiation,
3462 * but rejected our response, we already cleared the
3463 * sync rate before sending our WDTR.
3464 */
3465 if (tinfo->goal.offset != tinfo->curr.offset) {
3466
3467 /* Start the sync negotiation */
3468 ahc->msgout_index = 0;
3469 ahc->msgout_len = 0;
3470 ahc_build_transfer_msg(ahc, devinfo);
3471 ahc->msgout_index = 0;
3472 response = 1;
3473 }
3474 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, /*full*/FALSE)) {
3475 /* note asynch xfers and clear flag */
3476 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0,
3477 /*offset*/0, /*ppr_options*/0,
3478 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3479 /*paused*/TRUE);
3480 printf("(%s:%c:%d:%d): refuses synchronous negotiation. "
3481 "Using asynchronous transfers\n",
3482 ahc_name(ahc), devinfo->channel,
3483 devinfo->target, devinfo->lun);
3484 } else if ((scb->hscb->control & MSG_SIMPLE_TASK) != 0) {
3485 int tag_type;
3486 int mask;
3487
3488 tag_type = (scb->hscb->control & MSG_SIMPLE_TASK);
3489
3490 if (tag_type == MSG_SIMPLE_TASK) {
3491 printf("(%s:%c:%d:%d): refuses tagged commands. "
3492 "Performing non-tagged I/O\n", ahc_name(ahc),
3493 devinfo->channel, devinfo->target, devinfo->lun);
3494 ahc_set_tags(ahc, scb->io_ctx, devinfo, AHC_QUEUE_NONE);
3495 mask = ~0x23;
3496 } else {
3497 printf("(%s:%c:%d:%d): refuses %s tagged commands. "
3498 "Performing simple queue tagged I/O only\n",
3499 ahc_name(ahc), devinfo->channel, devinfo->target,
3500 devinfo->lun, tag_type == MSG_ORDERED_TASK
3501 ? "ordered" : "head of queue");
3502 ahc_set_tags(ahc, scb->io_ctx, devinfo, AHC_QUEUE_BASIC);
3503 mask = ~0x03;
3504 }
3505
3506 /*
3507 * Resend the identify for this CCB as the target
3508 * may believe that the selection is invalid otherwise.
3509 */
3510 ahc_outb(ahc, SCB_CONTROL,
3511 ahc_inb(ahc, SCB_CONTROL) & mask);
3512 scb->hscb->control &= mask;
3513 ahc_set_transaction_tag(scb, /*enabled*/FALSE,
3514 /*type*/MSG_SIMPLE_TASK);
3515 ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG);
3516 ahc_assert_atn(ahc);
3517
3518 /*
3519 * This transaction is now at the head of
3520 * the untagged queue for this target.
3521 */
3522 if ((ahc->flags & AHC_SCB_BTT) == 0) {
3523 struct scb_tailq *untagged_q;
3524
3525 untagged_q =
3526 &(ahc->untagged_queues[devinfo->target_offset]);
3527 TAILQ_INSERT_HEAD(untagged_q, scb, links.tqe);
3528 scb->flags |= SCB_UNTAGGEDQ;
3529 }
3530 ahc_busy_tcl(ahc, BUILD_TCL(scb->hscb->scsiid, devinfo->lun),
3531 scb->hscb->tag);
3532
3533 /*
3534 * Requeue all tagged commands for this target
3535 * currently in our posession so they can be
3536 * converted to untagged commands.
3537 */
3538 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb),
3539 SCB_GET_CHANNEL(ahc, scb),
3540 SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL,
3541 ROLE_INITIATOR, CAM_REQUEUE_REQ,
3542 SEARCH_COMPLETE);
3543 } else {
3544 /*
3545 * Otherwise, we ignore it.
3546 */
3547 printf("%s:%c:%d: Message reject for %x -- ignored\n",
3548 ahc_name(ahc), devinfo->channel, devinfo->target,
3549 last_msg);
3550 }
3551 return (response);
3552 }
3553
3554 /*
3555 * Process an ingnore wide residue message.
3556 */
3557 static void
3558 ahc_handle_ign_wide_residue(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
3559 {
3560 u_int scb_index;
3561 struct scb *scb;
3562
3563 scb_index = ahc_inb(ahc, SCB_TAG);
3564 scb = ahc_lookup_scb(ahc, scb_index);
3565 /*
3566 * XXX Actually check data direction in the sequencer?
3567 * Perhaps add datadir to some spare bits in the hscb?
3568 */
3569 if ((ahc_inb(ahc, SEQ_FLAGS) & DPHASE) == 0
3570 || ahc_get_transfer_dir(scb) != CAM_DIR_IN) {
3571 /*
3572 * Ignore the message if we haven't
3573 * seen an appropriate data phase yet.
3574 */
3575 } else {
3576 /*
3577 * If the residual occurred on the last
3578 * transfer and the transfer request was
3579 * expected to end on an odd count, do
3580 * nothing. Otherwise, subtract a byte
3581 * and update the residual count accordingly.
3582 */
3583 uint32_t sgptr;
3584
3585 sgptr = ahc_inb(ahc, SCB_RESIDUAL_SGPTR);
3586 if ((sgptr & SG_LIST_NULL) != 0
3587 && (ahc_inb(ahc, SCB_LUN) & SCB_XFERLEN_ODD) != 0) {
3588 /*
3589 * If the residual occurred on the last
3590 * transfer and the transfer request was
3591 * expected to end on an odd count, do
3592 * nothing.
3593 */
3594 } else {
3595 struct ahc_dma_seg *sg;
3596 uint32_t data_cnt;
3597 uint32_t data_addr;
3598 uint32_t sglen;
3599
3600 /* Pull in all of the sgptr */
3601 sgptr = ahc_inl(ahc, SCB_RESIDUAL_SGPTR);
3602 data_cnt = ahc_inl(ahc, SCB_RESIDUAL_DATACNT);
3603
3604 if ((sgptr & SG_LIST_NULL) != 0) {
3605 /*
3606 * The residual data count is not updated
3607 * for the command run to completion case.
3608 * Explicitly zero the count.
3609 */
3610 data_cnt &= ~AHC_SG_LEN_MASK;
3611 }
3612
3613 data_addr = ahc_inl(ahc, SHADDR);
3614
3615 data_cnt += 1;
3616 data_addr -= 1;
3617 sgptr &= SG_PTR_MASK;
3618
3619 sg = ahc_sg_bus_to_virt(scb, sgptr);
3620
3621 /*
3622 * The residual sg ptr points to the next S/G
3623 * to load so we must go back one.
3624 */
3625 sg--;
3626 sglen = ahc_le32toh(sg->len) & AHC_SG_LEN_MASK;
3627 if (sg != scb->sg_list
3628 && sglen < (data_cnt & AHC_SG_LEN_MASK)) {
3629
3630 sg--;
3631 sglen = ahc_le32toh(sg->len);
3632 /*
3633 * Preserve High Address and SG_LIST bits
3634 * while setting the count to 1.
3635 */
3636 data_cnt = 1 | (sglen & (~AHC_SG_LEN_MASK));
3637 data_addr = ahc_le32toh(sg->addr)
3638 + (sglen & AHC_SG_LEN_MASK) - 1;
3639
3640 /*
3641 * Increment sg so it points to the
3642 * "next" sg.
3643 */
3644 sg++;
3645 sgptr = ahc_sg_virt_to_bus(scb, sg);
3646 }
3647 ahc_outl(ahc, SCB_RESIDUAL_SGPTR, sgptr);
3648 ahc_outl(ahc, SCB_RESIDUAL_DATACNT, data_cnt);
3649 /*
3650 * Toggle the "oddness" of the transfer length
3651 * to handle this mid-transfer ignore wide
3652 * residue. This ensures that the oddness is
3653 * correct for subsequent data transfers.
3654 */
3655 ahc_outb(ahc, SCB_LUN,
3656 ahc_inb(ahc, SCB_LUN) ^ SCB_XFERLEN_ODD);
3657 }
3658 }
3659 }
3660
3661
3662 /*
3663 * Reinitialize the data pointers for the active transfer
3664 * based on its current residual.
3665 */
3666 static void
3667 ahc_reinitialize_dataptrs(struct ahc_softc *ahc)
3668 {
3669 struct scb *scb;
3670 struct ahc_dma_seg *sg;
3671 u_int scb_index;
3672 uint32_t sgptr;
3673 uint32_t resid;
3674 uint32_t dataptr;
3675
3676 scb_index = ahc_inb(ahc, SCB_TAG);
3677 scb = ahc_lookup_scb(ahc, scb_index);
3678 sgptr = (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24)
3679 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16)
3680 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8)
3681 | ahc_inb(ahc, SCB_RESIDUAL_SGPTR);
3682
3683 sgptr &= SG_PTR_MASK;
3684 sg = ahc_sg_bus_to_virt(scb, sgptr);
3685
3686 /* The residual sg_ptr always points to the next sg */
3687 sg--;
3688
3689 resid = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 2) << 16)
3690 | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 1) << 8)
3691 | ahc_inb(ahc, SCB_RESIDUAL_DATACNT);
3692
3693 dataptr = ahc_le32toh(sg->addr)
3694 + (ahc_le32toh(sg->len) & AHC_SG_LEN_MASK)
3695 - resid;
3696 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
3697 u_int dscommand1;
3698
3699 dscommand1 = ahc_inb(ahc, DSCOMMAND1);
3700 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0);
3701 ahc_outb(ahc, HADDR,
3702 (ahc_le32toh(sg->len) >> 24) & SG_HIGH_ADDR_BITS);
3703 ahc_outb(ahc, DSCOMMAND1, dscommand1);
3704 }
3705 ahc_outb(ahc, HADDR + 3, dataptr >> 24);
3706 ahc_outb(ahc, HADDR + 2, dataptr >> 16);
3707 ahc_outb(ahc, HADDR + 1, dataptr >> 8);
3708 ahc_outb(ahc, HADDR, dataptr);
3709 ahc_outb(ahc, HCNT + 2, resid >> 16);
3710 ahc_outb(ahc, HCNT + 1, resid >> 8);
3711 ahc_outb(ahc, HCNT, resid);
3712 if ((ahc->features & AHC_ULTRA2) == 0) {
3713 ahc_outb(ahc, STCNT + 2, resid >> 16);
3714 ahc_outb(ahc, STCNT + 1, resid >> 8);
3715 ahc_outb(ahc, STCNT, resid);
3716 }
3717 }
3718
3719 /*
3720 * Handle the effects of issuing a bus device reset message.
3721 */
3722 static void
3723 ahc_handle_devreset(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
3724 cam_status status, char *message, int verbose_level)
3725 {
3726 #ifdef AHC_TARGET_MODE
3727 struct ahc_tmode_tstate* tstate;
3728 u_int lun;
3729 #endif
3730 int found;
3731
3732 found = ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
3733 CAM_LUN_WILDCARD, SCB_LIST_NULL, devinfo->role,
3734 status);
3735
3736 #ifdef AHC_TARGET_MODE
3737 /*
3738 * Send an immediate notify ccb to all target mord peripheral
3739 * drivers affected by this action.
3740 */
3741 tstate = ahc->enabled_targets[devinfo->our_scsiid];
3742 if (tstate != NULL) {
3743 for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
3744 struct ahc_tmode_lstate* lstate;
3745
3746 lstate = tstate->enabled_luns[lun];
3747 if (lstate == NULL)
3748 continue;
3749
3750 ahc_queue_lstate_event(ahc, lstate, devinfo->our_scsiid,
3751 MSG_BUS_DEV_RESET, /*arg*/0);
3752 ahc_send_lstate_events(ahc, lstate);
3753 }
3754 }
3755 #endif
3756
3757 /*
3758 * Go back to async/narrow transfers and renegotiate.
3759 */
3760 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
3761 AHC_TRANS_CUR, /*paused*/TRUE);
3762 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL,
3763 /*period*/0, /*offset*/0, /*ppr_options*/0,
3764 AHC_TRANS_CUR, /*paused*/TRUE);
3765
3766 if (status != CAM_SEL_TIMEOUT)
3767 ahc_send_async(ahc, devinfo->channel, devinfo->target,
3768 CAM_LUN_WILDCARD, AC_SENT_BDR);
3769
3770 if (message != NULL
3771 && (verbose_level <= bootverbose))
3772 printf("%s: %s on %c:%d. %d SCBs aborted\n", ahc_name(ahc),
3773 message, devinfo->channel, devinfo->target, found);
3774 }
3775
3776 #ifdef AHC_TARGET_MODE
3777 static void
3778 ahc_setup_target_msgin(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
3779 struct scb *scb)
3780 {
3781
3782 /*
3783 * To facilitate adding multiple messages together,
3784 * each routine should increment the index and len
3785 * variables instead of setting them explicitly.
3786 */
3787 ahc->msgout_index = 0;
3788 ahc->msgout_len = 0;
3789
3790 if (scb != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 0)
3791 ahc_build_transfer_msg(ahc, devinfo);
3792 else
3793 panic("ahc_intr: AWAITING target message with no message");
3794
3795 ahc->msgout_index = 0;
3796 ahc->msg_type = MSG_TYPE_TARGET_MSGIN;
3797 }
3798 #endif
3799 /**************************** Initialization **********************************/
3800 /*
3801 * Allocate a controller structure for a new device
3802 * and perform initial initializion.
3803 */
3804 struct ahc_softc *
3805 ahc_alloc(void *platform_arg, char *name)
3806 {
3807 struct ahc_softc *ahc;
3808 int i;
3809
3810 #ifndef __FreeBSD__
3811 ahc = malloc(sizeof(*ahc), M_DEVBUF, M_NOWAIT);
3812 if (!ahc) {
3813 printf("aic7xxx: cannot malloc softc!\n");
3814 free(name, M_DEVBUF);
3815 return NULL;
3816 }
3817 #else
3818 ahc = device_get_softc((device_t)platform_arg);
3819 #endif
3820 memset(ahc, 0, sizeof(*ahc));
3821 ahc->seep_config = malloc(sizeof(*ahc->seep_config),
3822 M_DEVBUF, M_NOWAIT);
3823 if (ahc->seep_config == NULL) {
3824 #ifndef __FreeBSD__
3825 free(ahc, M_DEVBUF);
3826 #endif
3827 free(name, M_DEVBUF);
3828 return (NULL);
3829 }
3830 LIST_INIT(&ahc->pending_scbs);
3831 /* We don't know our unit number until the OSM sets it */
3832 ahc->name = name;
3833 ahc->unit = -1;
3834 ahc->description = NULL;
3835 ahc->channel = 'A';
3836 ahc->channel_b = 'B';
3837 ahc->chip = AHC_NONE;
3838 ahc->features = AHC_FENONE;
3839 ahc->bugs = AHC_BUGNONE;
3840 ahc->flags = AHC_FNONE;
3841 /*
3842 * Default to all error reporting enabled with the
3843 * sequencer operating at its fastest speed.
3844 * The bus attach code may modify this.
3845 */
3846 ahc->seqctl = FASTMODE;
3847
3848 for (i = 0; i < AHC_NUM_TARGETS; i++)
3849 TAILQ_INIT(&ahc->untagged_queues[i]);
3850 if (ahc_platform_alloc(ahc, platform_arg) != 0) {
3851 ahc_free(ahc);
3852 ahc = NULL;
3853 }
3854 return (ahc);
3855 }
3856
3857 int
3858 ahc_softc_init(struct ahc_softc *ahc)
3859 {
3860
3861 /* The IRQMS bit is only valid on VL and EISA chips */
3862 if ((ahc->chip & AHC_PCI) == 0)
3863 ahc->unpause = ahc_inb(ahc, HCNTRL) & IRQMS;
3864 else
3865 ahc->unpause = 0;
3866 ahc->pause = ahc->unpause | PAUSE;
3867 /* XXX The shared scb data stuff should be deprecated */
3868 if (ahc->scb_data == NULL) {
3869 ahc->scb_data = malloc(sizeof(*ahc->scb_data),
3870 M_DEVBUF, M_NOWAIT);
3871 if (ahc->scb_data == NULL)
3872 return (ENOMEM);
3873 memset(ahc->scb_data, 0, sizeof(*ahc->scb_data));
3874 }
3875
3876 return (0);
3877 }
3878
3879 void
3880 ahc_set_unit(struct ahc_softc *ahc, int unit)
3881 {
3882 ahc->unit = unit;
3883 }
3884
3885 void
3886 ahc_set_name(struct ahc_softc *ahc, char *name)
3887 {
3888 if (ahc->name != NULL)
3889 free(ahc->name, M_DEVBUF);
3890 ahc->name = name;
3891 }
3892
3893 void
3894 ahc_free(struct ahc_softc *ahc)
3895 {
3896 int i;
3897
3898 switch (ahc->init_level) {
3899 default:
3900 case 5:
3901 ahc_shutdown(ahc);
3902 /* FALLTHROUGH */
3903 case 4:
3904 ahc_dmamap_unload(ahc, ahc->shared_data_dmat,
3905 ahc->shared_data_dmamap);
3906 /* FALLTHROUGH */
3907 case 3:
3908 ahc_dmamem_free(ahc, ahc->shared_data_dmat, ahc->qoutfifo,
3909 ahc->shared_data_dmamap);
3910 ahc_dmamap_destroy(ahc, ahc->shared_data_dmat,
3911 ahc->shared_data_dmamap);
3912 /* FALLTHROUGH */
3913 case 2:
3914 ahc_dma_tag_destroy(ahc, ahc->shared_data_dmat);
3915 case 1:
3916 #ifndef __linux__
3917 ahc_dma_tag_destroy(ahc, ahc->buffer_dmat);
3918 #endif
3919 break;
3920 case 0:
3921 break;
3922 }
3923
3924 #ifndef __linux__
3925 ahc_dma_tag_destroy(ahc, ahc->parent_dmat);
3926 #endif
3927 ahc_platform_free(ahc);
3928 ahc_fini_scbdata(ahc);
3929 for (i = 0; i < AHC_NUM_TARGETS; i++) {
3930 struct ahc_tmode_tstate *tstate;
3931
3932 tstate = ahc->enabled_targets[i];
3933 if (tstate != NULL) {
3934 #ifdef AHC_TARGET_MODE
3935 int j;
3936
3937 for (j = 0; j < AHC_NUM_LUNS; j++) {
3938 struct ahc_tmode_lstate *lstate;
3939
3940 lstate = tstate->enabled_luns[j];
3941 if (lstate != NULL) {
3942 xpt_free_path(lstate->path);
3943 free(lstate, M_DEVBUF);
3944 }
3945 }
3946 #endif
3947 free(tstate, M_DEVBUF);
3948 }
3949 }
3950 #ifdef AHC_TARGET_MODE
3951 if (ahc->black_hole != NULL) {
3952 xpt_free_path(ahc->black_hole->path);
3953 free(ahc->black_hole, M_DEVBUF);
3954 }
3955 #endif
3956 if (ahc->name != NULL)
3957 free(ahc->name, M_DEVBUF);
3958 if (ahc->seep_config != NULL)
3959 free(ahc->seep_config, M_DEVBUF);
3960 #ifndef __FreeBSD__
3961 free(ahc, M_DEVBUF);
3962 #endif
3963 return;
3964 }
3965
3966 void
3967 ahc_shutdown(void *arg)
3968 {
3969 struct ahc_softc *ahc;
3970 int i;
3971
3972 ahc = (struct ahc_softc *)arg;
3973
3974 /* This will reset most registers to 0, but not all */
3975 ahc_reset(ahc, /*reinit*/FALSE);
3976 ahc_outb(ahc, SCSISEQ, 0);
3977 ahc_outb(ahc, SXFRCTL0, 0);
3978 ahc_outb(ahc, DSPCISTATUS, 0);
3979
3980 for (i = TARG_SCSIRATE; i < SCSICONF; i++)
3981 ahc_outb(ahc, i, 0);
3982 }
3983
3984 /*
3985 * Reset the controller and record some information about it
3986 * that is only available just after a reset. If "reinit" is
3987 * non-zero, this reset occured after initial configuration
3988 * and the caller requests that the chip be fully reinitialized
3989 * to a runable state. Chip interrupts are *not* enabled after
3990 * a reinitialization. The caller must enable interrupts via
3991 * ahc_intr_enable().
3992 */
3993 int
3994 ahc_reset(struct ahc_softc *ahc, int reinit)
3995 {
3996 u_int sblkctl;
3997 u_int sxfrctl1_a, sxfrctl1_b;
3998 int error;
3999 int wait;
4000
4001 /*
4002 * Preserve the value of the SXFRCTL1 register for all channels.
4003 * It contains settings that affect termination and we don't want
4004 * to disturb the integrity of the bus.
4005 */
4006 ahc_pause(ahc);
4007 sxfrctl1_b = 0;
4008 if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7770) {
4009 u_int sblkctl;
4010
4011 /*
4012 * Save channel B's settings in case this chip
4013 * is setup for TWIN channel operation.
4014 */
4015 sblkctl = ahc_inb(ahc, SBLKCTL);
4016 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
4017 sxfrctl1_b = ahc_inb(ahc, SXFRCTL1);
4018 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
4019 }
4020 sxfrctl1_a = ahc_inb(ahc, SXFRCTL1);
4021
4022 ahc_outb(ahc, HCNTRL, CHIPRST | ahc->pause);
4023
4024 /*
4025 * Ensure that the reset has finished. We delay 1000us
4026 * prior to reading the register to make sure the chip
4027 * has sufficiently completed its reset to handle register
4028 * accesses.
4029 */
4030 wait = 1000;
4031 do {
4032 ahc_delay(1000);
4033 } while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK));
4034
4035 if (wait == 0) {
4036 printf("%s: WARNING - Failed chip reset! "
4037 "Trying to initialize anyway.\n", ahc_name(ahc));
4038 }
4039 ahc_outb(ahc, HCNTRL, ahc->pause);
4040
4041 /* Determine channel configuration */
4042 sblkctl = ahc_inb(ahc, SBLKCTL) & (SELBUSB|SELWIDE);
4043 /* No Twin Channel PCI cards */
4044 if ((ahc->chip & AHC_PCI) != 0)
4045 sblkctl &= ~SELBUSB;
4046 switch (sblkctl) {
4047 case 0:
4048 /* Single Narrow Channel */
4049 break;
4050 case 2:
4051 /* Wide Channel */
4052 ahc->features |= AHC_WIDE;
4053 break;
4054 case 8:
4055 /* Twin Channel */
4056 ahc->features |= AHC_TWIN;
4057 break;
4058 default:
4059 printf(" Unsupported adapter type. Ignoring\n");
4060 return(-1);
4061 }
4062
4063 /*
4064 * Reload sxfrctl1.
4065 *
4066 * We must always initialize STPWEN to 1 before we
4067 * restore the saved values. STPWEN is initialized
4068 * to a tri-state condition which can only be cleared
4069 * by turning it on.
4070 */
4071 if ((ahc->features & AHC_TWIN) != 0) {
4072 u_int sblkctl;
4073
4074 sblkctl = ahc_inb(ahc, SBLKCTL);
4075 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
4076 ahc_outb(ahc, SXFRCTL1, sxfrctl1_b);
4077 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
4078 }
4079 ahc_outb(ahc, SXFRCTL1, sxfrctl1_a);
4080
4081 error = 0;
4082 if (reinit != 0)
4083 /*
4084 * If a recovery action has forced a chip reset,
4085 * re-initialize the chip to our liking.
4086 */
4087 error = ahc->bus_chip_init(ahc);
4088 #ifdef AHC_DUMP_SEQ
4089 else
4090 ahc_dumpseq(ahc);
4091 #endif
4092
4093 return (error);
4094 }
4095
4096 /*
4097 * Determine the number of SCBs available on the controller
4098 */
4099 int
4100 ahc_probe_scbs(struct ahc_softc *ahc) {
4101 int i;
4102
4103 for (i = 0; i < AHC_SCB_MAX; i++) {
4104
4105 ahc_outb(ahc, SCBPTR, i);
4106 ahc_outb(ahc, SCB_BASE, i);
4107 if (ahc_inb(ahc, SCB_BASE) != i)
4108 break;
4109 ahc_outb(ahc, SCBPTR, 0);
4110 if (ahc_inb(ahc, SCB_BASE) != 0)
4111 break;
4112 }
4113 return (i);
4114 }
4115
4116 static void
4117 ahc_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
4118 {
4119 dma_addr_t *baddr;
4120
4121 baddr = (dma_addr_t *)arg;
4122 *baddr = segs->ds_addr;
4123 }
4124
4125 static void
4126 ahc_build_free_scb_list(struct ahc_softc *ahc)
4127 {
4128 int scbsize;
4129 int i;
4130
4131 scbsize = 32;
4132 if ((ahc->flags & AHC_LSCBS_ENABLED) != 0)
4133 scbsize = 64;
4134
4135 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
4136 int j;
4137
4138 ahc_outb(ahc, SCBPTR, i);
4139
4140 /*
4141 * Touch all SCB bytes to avoid parity errors
4142 * should one of our debugging routines read
4143 * an otherwise uninitiatlized byte.
4144 */
4145 for (j = 0; j < scbsize; j++)
4146 ahc_outb(ahc, SCB_BASE+j, 0xFF);
4147
4148 /* Clear the control byte. */
4149 ahc_outb(ahc, SCB_CONTROL, 0);
4150
4151 /* Set the next pointer */
4152 if ((ahc->flags & AHC_PAGESCBS) != 0)
4153 ahc_outb(ahc, SCB_NEXT, i+1);
4154 else
4155 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
4156
4157 /* Make the tag number, SCSIID, and lun invalid */
4158 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
4159 ahc_outb(ahc, SCB_SCSIID, 0xFF);
4160 ahc_outb(ahc, SCB_LUN, 0xFF);
4161 }
4162
4163 if ((ahc->flags & AHC_PAGESCBS) != 0) {
4164 /* SCB 0 heads the free list. */
4165 ahc_outb(ahc, FREE_SCBH, 0);
4166 } else {
4167 /* No free list. */
4168 ahc_outb(ahc, FREE_SCBH, SCB_LIST_NULL);
4169 }
4170
4171 /* Make sure that the last SCB terminates the free list */
4172 ahc_outb(ahc, SCBPTR, i-1);
4173 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
4174 }
4175
4176 static int
4177 ahc_init_scbdata(struct ahc_softc *ahc)
4178 {
4179 struct scb_data *scb_data;
4180
4181 scb_data = ahc->scb_data;
4182 SLIST_INIT(&scb_data->free_scbs);
4183 SLIST_INIT(&scb_data->sg_maps);
4184
4185 /* Allocate SCB resources */
4186 scb_data->scbarray =
4187 (struct scb *)malloc(sizeof(struct scb) * AHC_SCB_MAX_ALLOC,
4188 M_DEVBUF, M_NOWAIT);
4189 if (scb_data->scbarray == NULL)
4190 return (ENOMEM);
4191 memset(scb_data->scbarray, 0, sizeof(struct scb) * AHC_SCB_MAX_ALLOC);
4192
4193 /* Determine the number of hardware SCBs and initialize them */
4194
4195 scb_data->maxhscbs = ahc_probe_scbs(ahc);
4196 if (ahc->scb_data->maxhscbs == 0) {
4197 printf("%s: No SCB space found\n", ahc_name(ahc));
4198 return (ENXIO);
4199 }
4200
4201 /*
4202 * Create our DMA tags. These tags define the kinds of device
4203 * accessible memory allocations and memory mappings we will
4204 * need to perform during normal operation.
4205 *
4206 * Unless we need to further restrict the allocation, we rely
4207 * on the restrictions of the parent dmat, hence the common
4208 * use of MAXADDR and MAXSIZE.
4209 */
4210
4211 /* DMA tag for our hardware scb structures */
4212 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
4213 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4214 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4215 /*highaddr*/BUS_SPACE_MAXADDR,
4216 /*filter*/NULL, /*filterarg*/NULL,
4217 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb),
4218 /*nsegments*/1,
4219 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4220 /*flags*/0, &scb_data->hscb_dmat) != 0) {
4221 goto error_exit;
4222 }
4223
4224 scb_data->init_level++;
4225
4226 /* Allocation for our hscbs */
4227 if (ahc_dmamem_alloc(ahc, scb_data->hscb_dmat,
4228 (void **)&scb_data->hscbs,
4229 BUS_DMA_NOWAIT, &scb_data->hscb_dmamap) != 0) {
4230 goto error_exit;
4231 }
4232
4233 scb_data->init_level++;
4234
4235 /* And permanently map them */
4236 ahc_dmamap_load(ahc, scb_data->hscb_dmat, scb_data->hscb_dmamap,
4237 scb_data->hscbs,
4238 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb),
4239 ahc_dmamap_cb, &scb_data->hscb_busaddr, /*flags*/0);
4240
4241 scb_data->init_level++;
4242
4243 /* DMA tag for our sense buffers */
4244 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
4245 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4246 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4247 /*highaddr*/BUS_SPACE_MAXADDR,
4248 /*filter*/NULL, /*filterarg*/NULL,
4249 AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data),
4250 /*nsegments*/1,
4251 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4252 /*flags*/0, &scb_data->sense_dmat) != 0) {
4253 goto error_exit;
4254 }
4255
4256 scb_data->init_level++;
4257
4258 /* Allocate them */
4259 if (ahc_dmamem_alloc(ahc, scb_data->sense_dmat,
4260 (void **)&scb_data->sense,
4261 BUS_DMA_NOWAIT, &scb_data->sense_dmamap) != 0) {
4262 goto error_exit;
4263 }
4264
4265 scb_data->init_level++;
4266
4267 /* And permanently map them */
4268 ahc_dmamap_load(ahc, scb_data->sense_dmat, scb_data->sense_dmamap,
4269 scb_data->sense,
4270 AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data),
4271 ahc_dmamap_cb, &scb_data->sense_busaddr, /*flags*/0);
4272
4273 scb_data->init_level++;
4274
4275 /* DMA tag for our S/G structures. We allocate in page sized chunks */
4276 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/8,
4277 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4278 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4279 /*highaddr*/BUS_SPACE_MAXADDR,
4280 /*filter*/NULL, /*filterarg*/NULL,
4281 PAGE_SIZE, /*nsegments*/1,
4282 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4283 /*flags*/0, &scb_data->sg_dmat) != 0) {
4284 goto error_exit;
4285 }
4286
4287 scb_data->init_level++;
4288
4289 /* Perform initial CCB allocation */
4290 memset(scb_data->hscbs, 0,
4291 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb));
4292 ahc_alloc_scbs(ahc);
4293
4294 if (scb_data->numscbs == 0) {
4295 printf("%s: ahc_init_scbdata - "
4296 "Unable to allocate initial scbs\n",
4297 ahc_name(ahc));
4298 goto error_exit;
4299 }
4300
4301 /*
4302 * Reserve the next queued SCB.
4303 */
4304 ahc->next_queued_scb = ahc_get_scb(ahc);
4305
4306 /*
4307 * Note that we were successfull
4308 */
4309 return (0);
4310
4311 error_exit:
4312
4313 return (ENOMEM);
4314 }
4315
4316 static void
4317 ahc_fini_scbdata(struct ahc_softc *ahc)
4318 {
4319 struct scb_data *scb_data;
4320
4321 scb_data = ahc->scb_data;
4322 if (scb_data == NULL)
4323 return;
4324
4325 switch (scb_data->init_level) {
4326 default:
4327 case 7:
4328 {
4329 struct sg_map_node *sg_map;
4330
4331 while ((sg_map = SLIST_FIRST(&scb_data->sg_maps))!= NULL) {
4332 SLIST_REMOVE_HEAD(&scb_data->sg_maps, links);
4333 ahc_dmamap_unload(ahc, scb_data->sg_dmat,
4334 sg_map->sg_dmamap);
4335 ahc_dmamem_free(ahc, scb_data->sg_dmat,
4336 sg_map->sg_vaddr,
4337 sg_map->sg_dmamap);
4338 free(sg_map, M_DEVBUF);
4339 }
4340 ahc_dma_tag_destroy(ahc, scb_data->sg_dmat);
4341 }
4342 case 6:
4343 ahc_dmamap_unload(ahc, scb_data->sense_dmat,
4344 scb_data->sense_dmamap);
4345 case 5:
4346 ahc_dmamem_free(ahc, scb_data->sense_dmat, scb_data->sense,
4347 scb_data->sense_dmamap);
4348 ahc_dmamap_destroy(ahc, scb_data->sense_dmat,
4349 scb_data->sense_dmamap);
4350 case 4:
4351 ahc_dma_tag_destroy(ahc, scb_data->sense_dmat);
4352 case 3:
4353 ahc_dmamap_unload(ahc, scb_data->hscb_dmat,
4354 scb_data->hscb_dmamap);
4355 case 2:
4356 ahc_dmamem_free(ahc, scb_data->hscb_dmat, scb_data->hscbs,
4357 scb_data->hscb_dmamap);
4358 ahc_dmamap_destroy(ahc, scb_data->hscb_dmat,
4359 scb_data->hscb_dmamap);
4360 case 1:
4361 ahc_dma_tag_destroy(ahc, scb_data->hscb_dmat);
4362 break;
4363 case 0:
4364 break;
4365 }
4366 if (scb_data->scbarray != NULL)
4367 free(scb_data->scbarray, M_DEVBUF);
4368 }
4369
4370 void
4371 ahc_alloc_scbs(struct ahc_softc *ahc)
4372 {
4373 struct scb_data *scb_data;
4374 struct scb *next_scb;
4375 struct sg_map_node *sg_map;
4376 dma_addr_t physaddr;
4377 struct ahc_dma_seg *segs;
4378 int newcount;
4379 int i;
4380
4381 scb_data = ahc->scb_data;
4382 if (scb_data->numscbs >= AHC_SCB_MAX_ALLOC)
4383 /* Can't allocate any more */
4384 return;
4385
4386 next_scb = &scb_data->scbarray[scb_data->numscbs];
4387
4388 sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
4389
4390 if (sg_map == NULL)
4391 return;
4392
4393 /* Allocate S/G space for the next batch of SCBS */
4394 if (ahc_dmamem_alloc(ahc, scb_data->sg_dmat,
4395 (void **)&sg_map->sg_vaddr,
4396 BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
4397 free(sg_map, M_DEVBUF);
4398 return;
4399 }
4400
4401 SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links);
4402
4403 ahc_dmamap_load(ahc, scb_data->sg_dmat, sg_map->sg_dmamap,
4404 sg_map->sg_vaddr, PAGE_SIZE, ahc_dmamap_cb,
4405 &sg_map->sg_physaddr, /*flags*/0);
4406
4407 segs = sg_map->sg_vaddr;
4408 physaddr = sg_map->sg_physaddr;
4409
4410 newcount = (PAGE_SIZE / (AHC_NSEG * sizeof(struct ahc_dma_seg)));
4411 newcount = min(newcount, (AHC_SCB_MAX_ALLOC - scb_data->numscbs));
4412 for (i = 0; i < newcount; i++) {
4413 struct scb_platform_data *pdata;
4414 #ifndef __linux__
4415 int error;
4416 #endif
4417 pdata = (struct scb_platform_data *)malloc(sizeof(*pdata),
4418 M_DEVBUF, M_NOWAIT);
4419 if (pdata == NULL)
4420 break;
4421 next_scb->platform_data = pdata;
4422 next_scb->sg_map = sg_map;
4423 next_scb->sg_list = segs;
4424 /*
4425 * The sequencer always starts with the second entry.
4426 * The first entry is embedded in the scb.
4427 */
4428 next_scb->sg_list_phys = physaddr + sizeof(struct ahc_dma_seg);
4429 next_scb->ahc_softc = ahc;
4430 next_scb->flags = SCB_FREE;
4431 #ifndef __linux__
4432 error = ahc_dmamap_create(ahc, ahc->buffer_dmat, /*flags*/0,
4433 &next_scb->dmamap);
4434 if (error != 0)
4435 break;
4436 #endif
4437 next_scb->hscb = &scb_data->hscbs[scb_data->numscbs];
4438 next_scb->hscb->tag = ahc->scb_data->numscbs;
4439 SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs,
4440 next_scb, links.sle);
4441 segs += AHC_NSEG;
4442 physaddr += (AHC_NSEG * sizeof(struct ahc_dma_seg));
4443 next_scb++;
4444 ahc->scb_data->numscbs++;
4445 }
4446 }
4447
4448 void
4449 ahc_controller_info(struct ahc_softc *ahc, char *buf)
4450 {
4451 int len;
4452
4453 len = sprintf(buf, "%s: ", ahc_chip_names[ahc->chip & AHC_CHIPID_MASK]);
4454 buf += len;
4455 if ((ahc->features & AHC_TWIN) != 0)
4456 len = sprintf(buf, "Twin Channel, A SCSI Id=%d, "
4457 "B SCSI Id=%d, primary %c, ",
4458 ahc->our_id, ahc->our_id_b,
4459 (ahc->flags & AHC_PRIMARY_CHANNEL) + 'A');
4460 else {
4461 const char *speed;
4462 const char *type;
4463
4464 speed = "";
4465 if ((ahc->features & AHC_ULTRA) != 0) {
4466 speed = "Ultra ";
4467 } else if ((ahc->features & AHC_DT) != 0) {
4468 speed = "Ultra160 ";
4469 } else if ((ahc->features & AHC_ULTRA2) != 0) {
4470 speed = "Ultra2 ";
4471 }
4472 if ((ahc->features & AHC_WIDE) != 0) {
4473 type = "Wide";
4474 } else {
4475 type = "Single";
4476 }
4477 len = sprintf(buf, "%s%s Channel %c, SCSI Id=%d, ",
4478 speed, type, ahc->channel, ahc->our_id);
4479 }
4480 buf += len;
4481
4482 if ((ahc->flags & AHC_PAGESCBS) != 0)
4483 sprintf(buf, "%d/%d SCBs",
4484 ahc->scb_data->maxhscbs, AHC_MAX_QUEUE);
4485 else
4486 sprintf(buf, "%d SCBs", ahc->scb_data->maxhscbs);
4487 }
4488
4489 int
4490 ahc_chip_init(struct ahc_softc *ahc)
4491 {
4492 int term;
4493 int error;
4494 u_int i;
4495 u_int scsi_conf;
4496 u_int scsiseq_template;
4497 uint32_t physaddr;
4498
4499 ahc_outb(ahc, SEQ_FLAGS, 0);
4500 ahc_outb(ahc, SEQ_FLAGS2, 0);
4501
4502 /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/
4503 if (ahc->features & AHC_TWIN) {
4504
4505 /*
4506 * Setup Channel B first.
4507 */
4508 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB);
4509 term = (ahc->flags & AHC_TERM_ENB_B) != 0 ? STPWEN : 0;
4510 ahc_outb(ahc, SCSIID, ahc->our_id_b);
4511 scsi_conf = ahc_inb(ahc, SCSICONF + 1);
4512 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
4513 |term|ahc->seltime_b|ENSTIMER|ACTNEGEN);
4514 if ((ahc->features & AHC_ULTRA2) != 0)
4515 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR);
4516 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
4517 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
4518
4519 /* Select Channel A */
4520 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB);
4521 }
4522 term = (ahc->flags & AHC_TERM_ENB_A) != 0 ? STPWEN : 0;
4523 if ((ahc->features & AHC_ULTRA2) != 0)
4524 ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id);
4525 else
4526 ahc_outb(ahc, SCSIID, ahc->our_id);
4527 scsi_conf = ahc_inb(ahc, SCSICONF);
4528 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
4529 |term|ahc->seltime
4530 |ENSTIMER|ACTNEGEN);
4531 if ((ahc->features & AHC_ULTRA2) != 0)
4532 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR);
4533 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
4534 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
4535
4536 /* There are no untagged SCBs active yet. */
4537 for (i = 0; i < 16; i++) {
4538 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, 0));
4539 if ((ahc->flags & AHC_SCB_BTT) != 0) {
4540 int lun;
4541
4542 /*
4543 * The SCB based BTT allows an entry per
4544 * target and lun pair.
4545 */
4546 for (lun = 1; lun < AHC_NUM_LUNS; lun++)
4547 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, lun));
4548 }
4549 }
4550
4551 /* All of our queues are empty */
4552 for (i = 0; i < 256; i++)
4553 ahc->qoutfifo[i] = SCB_LIST_NULL;
4554 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_PREREAD);
4555
4556 for (i = 0; i < 256; i++)
4557 ahc->qinfifo[i] = SCB_LIST_NULL;
4558
4559 if ((ahc->features & AHC_MULTI_TID) != 0) {
4560 ahc_outb(ahc, TARGID, 0);
4561 ahc_outb(ahc, TARGID + 1, 0);
4562 }
4563
4564 /*
4565 * Tell the sequencer where it can find our arrays in memory.
4566 */
4567 physaddr = ahc->scb_data->hscb_busaddr;
4568 ahc_outb(ahc, HSCB_ADDR, physaddr & 0xFF);
4569 ahc_outb(ahc, HSCB_ADDR + 1, (physaddr >> 8) & 0xFF);
4570 ahc_outb(ahc, HSCB_ADDR + 2, (physaddr >> 16) & 0xFF);
4571 ahc_outb(ahc, HSCB_ADDR + 3, (physaddr >> 24) & 0xFF);
4572
4573 physaddr = ahc->shared_data_busaddr;
4574 ahc_outb(ahc, SHARED_DATA_ADDR, physaddr & 0xFF);
4575 ahc_outb(ahc, SHARED_DATA_ADDR + 1, (physaddr >> 8) & 0xFF);
4576 ahc_outb(ahc, SHARED_DATA_ADDR + 2, (physaddr >> 16) & 0xFF);
4577 ahc_outb(ahc, SHARED_DATA_ADDR + 3, (physaddr >> 24) & 0xFF);
4578
4579 /*
4580 * Initialize the group code to command length table.
4581 * This overrides the values in TARG_SCSIRATE, so only
4582 * setup the table after we have processed that information.
4583 */
4584 ahc_outb(ahc, CMDSIZE_TABLE, 5);
4585 ahc_outb(ahc, CMDSIZE_TABLE + 1, 9);
4586 ahc_outb(ahc, CMDSIZE_TABLE + 2, 9);
4587 ahc_outb(ahc, CMDSIZE_TABLE + 3, 0);
4588 ahc_outb(ahc, CMDSIZE_TABLE + 4, 15);
4589 ahc_outb(ahc, CMDSIZE_TABLE + 5, 11);
4590 ahc_outb(ahc, CMDSIZE_TABLE + 6, 0);
4591 ahc_outb(ahc, CMDSIZE_TABLE + 7, 0);
4592
4593 if ((ahc->features & AHC_HS_MAILBOX) != 0)
4594 ahc_outb(ahc, HS_MAILBOX, 0);
4595
4596 /* Tell the sequencer of our initial queue positions */
4597 if ((ahc->features & AHC_TARGETMODE) != 0) {
4598 ahc->tqinfifonext = 1;
4599 ahc_outb(ahc, KERNEL_TQINPOS, ahc->tqinfifonext - 1);
4600 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext);
4601 }
4602 ahc->qinfifonext = 0;
4603 ahc->qoutfifonext = 0;
4604 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
4605 ahc_outb(ahc, QOFF_CTLSTA, SCB_QSIZE_256);
4606 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
4607 ahc_outb(ahc, SNSCB_QOFF, ahc->qinfifonext);
4608 ahc_outb(ahc, SDSCB_QOFF, 0);
4609 } else {
4610 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
4611 ahc_outb(ahc, QINPOS, ahc->qinfifonext);
4612 ahc_outb(ahc, QOUTPOS, ahc->qoutfifonext);
4613 }
4614
4615 /* We don't have any waiting selections */
4616 ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL);
4617
4618 /* Our disconnection list is empty too */
4619 ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL);
4620
4621 /* Message out buffer starts empty */
4622 ahc_outb(ahc, MSG_OUT, MSG_NOOP);
4623
4624 /*
4625 * Setup the allowed SCSI Sequences based on operational mode.
4626 * If we are a target, we'll enalbe select in operations once
4627 * we've had a lun enabled.
4628 */
4629 scsiseq_template = ENSELO|ENAUTOATNO|ENAUTOATNP;
4630 if ((ahc->flags & AHC_INITIATORROLE) != 0)
4631 scsiseq_template |= ENRSELI;
4632 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq_template);
4633
4634 /* Initialize our list of free SCBs. */
4635 ahc_build_free_scb_list(ahc);
4636
4637 /*
4638 * Tell the sequencer which SCB will be the next one it receives.
4639 */
4640 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag);
4641
4642 /*
4643 * Load the Sequencer program and Enable the adapter
4644 * in "fast" mode.
4645 */
4646 if (bootverbose)
4647 printf("%s: Downloading Sequencer Program...",
4648 ahc_name(ahc));
4649
4650 error = ahc_loadseq(ahc);
4651 if (error != 0)
4652 return (error);
4653
4654 if ((ahc->features & AHC_ULTRA2) != 0) {
4655 int wait;
4656
4657 /*
4658 * Wait for up to 500ms for our transceivers
4659 * to settle. If the adapter does not have
4660 * a cable attached, the transceivers may
4661 * never settle, so don't complain if we
4662 * fail here.
4663 */
4664 for (wait = 5000;
4665 (ahc_inb(ahc, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait;
4666 wait--)
4667 ahc_delay(100);
4668 }
4669 ahc_restart(ahc);
4670 return (0);
4671 }
4672
4673 /*
4674 * Start the board, ready for normal operation
4675 */
4676 int
4677 ahc_init(struct ahc_softc *ahc)
4678 {
4679 int max_targ;
4680 u_int i;
4681 u_int scsi_conf;
4682 u_int ultraenb;
4683 u_int discenable;
4684 u_int tagenable;
4685 size_t driver_data_size;
4686
4687 #ifdef AHC_DEBUG
4688 if ((ahc_debug & AHC_DEBUG_SEQUENCER) != 0)
4689 ahc->flags |= AHC_SEQUENCER_DEBUG;
4690 #endif
4691
4692 #ifdef AHC_PRINT_SRAM
4693 printf("Scratch Ram:");
4694 for (i = 0x20; i < 0x5f; i++) {
4695 if (((i % 8) == 0) && (i != 0)) {
4696 printf ("\n ");
4697 }
4698 printf (" 0x%x", ahc_inb(ahc, i));
4699 }
4700 if ((ahc->features & AHC_MORE_SRAM) != 0) {
4701 for (i = 0x70; i < 0x7f; i++) {
4702 if (((i % 8) == 0) && (i != 0)) {
4703 printf ("\n ");
4704 }
4705 printf (" 0x%x", ahc_inb(ahc, i));
4706 }
4707 }
4708 printf ("\n");
4709 /*
4710 * Reading uninitialized scratch ram may
4711 * generate parity errors.
4712 */
4713 ahc_outb(ahc, CLRINT, CLRPARERR);
4714 ahc_outb(ahc, CLRINT, CLRBRKADRINT);
4715 #endif
4716 max_targ = 15;
4717
4718 /*
4719 * Assume we have a board at this stage and it has been reset.
4720 */
4721 if ((ahc->flags & AHC_USEDEFAULTS) != 0)
4722 ahc->our_id = ahc->our_id_b = 7;
4723
4724 /*
4725 * Default to allowing initiator operations.
4726 */
4727 ahc->flags |= AHC_INITIATORROLE;
4728
4729 /*
4730 * Only allow target mode features if this unit has them enabled.
4731 */
4732 if ((AHC_TMODE_ENABLE & (0x1 << ahc->unit)) == 0)
4733 ahc->features &= ~AHC_TARGETMODE;
4734
4735 #ifndef __linux__
4736 /* DMA tag for mapping buffers into device visible space. */
4737 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
4738 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4739 /*lowaddr*/ahc->flags & AHC_39BIT_ADDRESSING
4740 ? (dma_addr_t)0x7FFFFFFFFFULL
4741 : BUS_SPACE_MAXADDR_32BIT,
4742 /*highaddr*/BUS_SPACE_MAXADDR,
4743 /*filter*/NULL, /*filterarg*/NULL,
4744 /*maxsize*/(AHC_NSEG - 1) * PAGE_SIZE,
4745 /*nsegments*/AHC_NSEG,
4746 /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
4747 /*flags*/BUS_DMA_ALLOCNOW,
4748 &ahc->buffer_dmat) != 0) {
4749 return (ENOMEM);
4750 }
4751 #endif
4752
4753 ahc->init_level++;
4754
4755 /*
4756 * DMA tag for our command fifos and other data in system memory
4757 * the card's sequencer must be able to access. For initiator
4758 * roles, we need to allocate space for the qinfifo and qoutfifo.
4759 * The qinfifo and qoutfifo are composed of 256 1 byte elements.
4760 * When providing for the target mode role, we must additionally
4761 * provide space for the incoming target command fifo and an extra
4762 * byte to deal with a dma bug in some chip versions.
4763 */
4764 driver_data_size = 2 * 256 * sizeof(uint8_t);
4765 if ((ahc->features & AHC_TARGETMODE) != 0)
4766 driver_data_size += AHC_TMODE_CMDS * sizeof(struct target_cmd)
4767 + /*DMA WideOdd Bug Buffer*/1;
4768 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
4769 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4770 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4771 /*highaddr*/BUS_SPACE_MAXADDR,
4772 /*filter*/NULL, /*filterarg*/NULL,
4773 driver_data_size,
4774 /*nsegments*/1,
4775 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4776 /*flags*/0, &ahc->shared_data_dmat) != 0) {
4777 return (ENOMEM);
4778 }
4779
4780 ahc->init_level++;
4781
4782 /* Allocation of driver data */
4783 if (ahc_dmamem_alloc(ahc, ahc->shared_data_dmat,
4784 (void **)&ahc->qoutfifo,
4785 BUS_DMA_NOWAIT, &ahc->shared_data_dmamap) != 0) {
4786 return (ENOMEM);
4787 }
4788
4789 ahc->init_level++;
4790
4791 /* And permanently map it in */
4792 ahc_dmamap_load(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap,
4793 ahc->qoutfifo, driver_data_size, ahc_dmamap_cb,
4794 &ahc->shared_data_busaddr, /*flags*/0);
4795
4796 if ((ahc->features & AHC_TARGETMODE) != 0) {
4797 ahc->targetcmds = (struct target_cmd *)ahc->qoutfifo;
4798 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[AHC_TMODE_CMDS];
4799 ahc->dma_bug_buf = ahc->shared_data_busaddr
4800 + driver_data_size - 1;
4801 /* All target command blocks start out invalid. */
4802 for (i = 0; i < AHC_TMODE_CMDS; i++)
4803 ahc->targetcmds[i].cmd_valid = 0;
4804 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_PREREAD);
4805 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[256];
4806 }
4807 ahc->qinfifo = &ahc->qoutfifo[256];
4808
4809 ahc->init_level++;
4810
4811 /* Allocate SCB data now that buffer_dmat is initialized */
4812 if (ahc->scb_data->maxhscbs == 0)
4813 if (ahc_init_scbdata(ahc) != 0)
4814 return (ENOMEM);
4815
4816 /*
4817 * Allocate a tstate to house information for our
4818 * initiator presence on the bus as well as the user
4819 * data for any target mode initiator.
4820 */
4821 if (ahc_alloc_tstate(ahc, ahc->our_id, 'A') == NULL) {
4822 printf("%s: unable to allocate ahc_tmode_tstate. "
4823 "Failing attach\n", ahc_name(ahc));
4824 return (ENOMEM);
4825 }
4826
4827 if ((ahc->features & AHC_TWIN) != 0) {
4828 if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) {
4829 printf("%s: unable to allocate ahc_tmode_tstate. "
4830 "Failing attach\n", ahc_name(ahc));
4831 return (ENOMEM);
4832 }
4833 }
4834
4835 if (ahc->scb_data->maxhscbs < AHC_SCB_MAX_ALLOC) {
4836 ahc->flags |= AHC_PAGESCBS;
4837 } else {
4838 ahc->flags &= ~AHC_PAGESCBS;
4839 }
4840
4841 #ifdef AHC_DEBUG
4842 if (ahc_debug & AHC_SHOW_MISC) {
4843 printf("%s: hardware scb %u bytes; kernel scb %u bytes; "
4844 "ahc_dma %u bytes\n",
4845 ahc_name(ahc),
4846 (u_int)sizeof(struct hardware_scb),
4847 (u_int)sizeof(struct scb),
4848 (u_int)sizeof(struct ahc_dma_seg));
4849 }
4850 #endif /* AHC_DEBUG */
4851
4852 /*
4853 * Look at the information that board initialization or
4854 * the board bios has left us.
4855 */
4856 if (ahc->features & AHC_TWIN) {
4857 scsi_conf = ahc_inb(ahc, SCSICONF + 1);
4858 if ((scsi_conf & RESET_SCSI) != 0
4859 && (ahc->flags & AHC_INITIATORROLE) != 0)
4860 ahc->flags |= AHC_RESET_BUS_B;
4861 }
4862
4863 scsi_conf = ahc_inb(ahc, SCSICONF);
4864 if ((scsi_conf & RESET_SCSI) != 0
4865 && (ahc->flags & AHC_INITIATORROLE) != 0)
4866 ahc->flags |= AHC_RESET_BUS_A;
4867
4868 ultraenb = 0;
4869 tagenable = ALL_TARGETS_MASK;
4870
4871 /* Grab the disconnection disable table and invert it for our needs */
4872 if ((ahc->flags & AHC_USEDEFAULTS) != 0) {
4873 printf("%s: Host Adapter Bios disabled. Using default SCSI "
4874 "device parameters\n", ahc_name(ahc));
4875 ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B|
4876 AHC_TERM_ENB_A|AHC_TERM_ENB_B;
4877 discenable = ALL_TARGETS_MASK;
4878 if ((ahc->features & AHC_ULTRA) != 0)
4879 ultraenb = ALL_TARGETS_MASK;
4880 } else {
4881 discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8)
4882 | ahc_inb(ahc, DISC_DSB));
4883 if ((ahc->features & (AHC_ULTRA|AHC_ULTRA2)) != 0)
4884 ultraenb = (ahc_inb(ahc, ULTRA_ENB + 1) << 8)
4885 | ahc_inb(ahc, ULTRA_ENB);
4886 }
4887
4888 if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
4889 max_targ = 7;
4890
4891 for (i = 0; i <= max_targ; i++) {
4892 struct ahc_initiator_tinfo *tinfo;
4893 struct ahc_tmode_tstate *tstate;
4894 u_int our_id;
4895 u_int target_id;
4896 char channel;
4897
4898 channel = 'A';
4899 our_id = ahc->our_id;
4900 target_id = i;
4901 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
4902 channel = 'B';
4903 our_id = ahc->our_id_b;
4904 target_id = i % 8;
4905 }
4906 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
4907 target_id, &tstate);
4908 /* Default to async narrow across the board */
4909 memset(tinfo, 0, sizeof(*tinfo));
4910 if (ahc->flags & AHC_USEDEFAULTS) {
4911 if ((ahc->features & AHC_WIDE) != 0)
4912 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT;
4913
4914 /*
4915 * These will be truncated when we determine the
4916 * connection type we have with the target.
4917 */
4918 tinfo->user.period = ahc_syncrates->period;
4919 tinfo->user.offset = MAX_OFFSET;
4920 } else {
4921 u_int scsirate;
4922 uint16_t mask;
4923
4924 /* Take the settings leftover in scratch RAM. */
4925 scsirate = ahc_inb(ahc, TARG_SCSIRATE + i);
4926 mask = (0x01 << i);
4927 if ((ahc->features & AHC_ULTRA2) != 0) {
4928 u_int offset;
4929 u_int maxsync;
4930
4931 if ((scsirate & SOFS) == 0x0F) {
4932 /*
4933 * Haven't negotiated yet,
4934 * so the format is different.
4935 */
4936 scsirate = (scsirate & SXFR) >> 4
4937 | (ultraenb & mask)
4938 ? 0x08 : 0x0
4939 | (scsirate & WIDEXFER);
4940 offset = MAX_OFFSET_ULTRA2;
4941 } else
4942 offset = ahc_inb(ahc, TARG_OFFSET + i);
4943 if ((scsirate & ~WIDEXFER) == 0 && offset != 0)
4944 /* Set to the lowest sync rate, 5MHz */
4945 scsirate |= 0x1c;
4946 maxsync = AHC_SYNCRATE_ULTRA2;
4947 if ((ahc->features & AHC_DT) != 0)
4948 maxsync = AHC_SYNCRATE_DT;
4949 tinfo->user.period =
4950 ahc_find_period(ahc, scsirate, maxsync);
4951 if (offset == 0)
4952 tinfo->user.period = 0;
4953 else
4954 tinfo->user.offset = MAX_OFFSET;
4955 if ((scsirate & SXFR_ULTRA2) <= 8/*10MHz*/
4956 && (ahc->features & AHC_DT) != 0)
4957 tinfo->user.ppr_options =
4958 MSG_EXT_PPR_DT_REQ;
4959 } else if ((scsirate & SOFS) != 0) {
4960 if ((scsirate & SXFR) == 0x40
4961 && (ultraenb & mask) != 0) {
4962 /* Treat 10MHz as a non-ultra speed */
4963 scsirate &= ~SXFR;
4964 ultraenb &= ~mask;
4965 }
4966 tinfo->user.period =
4967 ahc_find_period(ahc, scsirate,
4968 (ultraenb & mask)
4969 ? AHC_SYNCRATE_ULTRA
4970 : AHC_SYNCRATE_FAST);
4971 if (tinfo->user.period != 0)
4972 tinfo->user.offset = MAX_OFFSET;
4973 }
4974 if (tinfo->user.period == 0)
4975 tinfo->user.offset = 0;
4976 if ((scsirate & WIDEXFER) != 0
4977 && (ahc->features & AHC_WIDE) != 0)
4978 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT;
4979 tinfo->user.protocol_version = 4;
4980 if ((ahc->features & AHC_DT) != 0)
4981 tinfo->user.transport_version = 3;
4982 else
4983 tinfo->user.transport_version = 2;
4984 tinfo->goal.protocol_version = 2;
4985 tinfo->goal.transport_version = 2;
4986 tinfo->curr.protocol_version = 2;
4987 tinfo->curr.transport_version = 2;
4988 }
4989 tstate->ultraenb = 0;
4990 }
4991 ahc->user_discenable = discenable;
4992 ahc->user_tagenable = tagenable;
4993
4994 return (ahc->bus_chip_init(ahc));
4995 }
4996
4997 void
4998 ahc_intr_enable(struct ahc_softc *ahc, int enable)
4999 {
5000 u_int hcntrl;
5001
5002 hcntrl = ahc_inb(ahc, HCNTRL);
5003 hcntrl &= ~INTEN;
5004 ahc->pause &= ~INTEN;
5005 ahc->unpause &= ~INTEN;
5006 if (enable) {
5007 hcntrl |= INTEN;
5008 ahc->pause |= INTEN;
5009 ahc->unpause |= INTEN;
5010 }
5011 ahc_outb(ahc, HCNTRL, hcntrl);
5012 }
5013
5014 /*
5015 * Ensure that the card is paused in a location
5016 * outside of all critical sections and that all
5017 * pending work is completed prior to returning.
5018 * This routine should only be called from outside
5019 * an interrupt context.
5020 */
5021 void
5022 ahc_pause_and_flushwork(struct ahc_softc *ahc)
5023 {
5024 int intstat;
5025 int maxloops;
5026 int paused;
5027
5028 maxloops = 1000;
5029 ahc->flags |= AHC_ALL_INTERRUPTS;
5030 paused = FALSE;
5031 do {
5032 if (paused) {
5033 ahc_unpause(ahc);
5034 /*
5035 * Give the sequencer some time to service
5036 * any active selections.
5037 */
5038 ahc_delay(500);
5039 }
5040 ahc_intr(ahc);
5041 ahc_pause(ahc);
5042 paused = TRUE;
5043 ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & ~ENSELO);
5044 intstat = ahc_inb(ahc, INTSTAT);
5045 if ((intstat & INT_PEND) == 0) {
5046 ahc_clear_critical_section(ahc);
5047 intstat = ahc_inb(ahc, INTSTAT);
5048 }
5049 } while (--maxloops
5050 && (intstat != 0xFF || (ahc->features & AHC_REMOVABLE) == 0)
5051 && ((intstat & INT_PEND) != 0
5052 || (ahc_inb(ahc, SSTAT0) & (SELDO|SELINGO)) != 0));
5053 if (maxloops == 0) {
5054 printf("Infinite interrupt loop, INTSTAT = %x",
5055 ahc_inb(ahc, INTSTAT));
5056 }
5057 ahc_platform_flushwork(ahc);
5058 ahc->flags &= ~AHC_ALL_INTERRUPTS;
5059 }
5060
5061 int
5062 ahc_suspend(struct ahc_softc *ahc)
5063 {
5064
5065 ahc_pause_and_flushwork(ahc);
5066
5067 if (LIST_FIRST(&ahc->pending_scbs) != NULL) {
5068 ahc_unpause(ahc);
5069 return (EBUSY);
5070 }
5071
5072 #ifdef AHC_TARGET_MODE
5073 /*
5074 * XXX What about ATIOs that have not yet been serviced?
5075 * Perhaps we should just refuse to be suspended if we
5076 * are acting in a target role.
5077 */
5078 if (ahc->pending_device != NULL) {
5079 ahc_unpause(ahc);
5080 return (EBUSY);
5081 }
5082 #endif
5083 ahc_shutdown(ahc);
5084 return (0);
5085 }
5086
5087 int
5088 ahc_resume(struct ahc_softc *ahc)
5089 {
5090
5091 ahc_reset(ahc, /*reinit*/TRUE);
5092 ahc_intr_enable(ahc, TRUE);
5093 ahc_restart(ahc);
5094 return (0);
5095 }
5096
5097 /************************** Busy Target Table *********************************/
5098 /*
5099 * Return the untagged transaction id for a given target/channel lun.
5100 * Optionally, clear the entry.
5101 */
5102 u_int
5103 ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl)
5104 {
5105 u_int scbid;
5106 u_int target_offset;
5107
5108 if ((ahc->flags & AHC_SCB_BTT) != 0) {
5109 u_int saved_scbptr;
5110
5111 saved_scbptr = ahc_inb(ahc, SCBPTR);
5112 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
5113 scbid = ahc_inb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl));
5114 ahc_outb(ahc, SCBPTR, saved_scbptr);
5115 } else {
5116 target_offset = TCL_TARGET_OFFSET(tcl);
5117 scbid = ahc_inb(ahc, BUSY_TARGETS + target_offset);
5118 }
5119
5120 return (scbid);
5121 }
5122
5123 void
5124 ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl)
5125 {
5126 u_int target_offset;
5127
5128 if ((ahc->flags & AHC_SCB_BTT) != 0) {
5129 u_int saved_scbptr;
5130
5131 saved_scbptr = ahc_inb(ahc, SCBPTR);
5132 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
5133 ahc_outb(ahc, SCB_64_BTT+TCL_TARGET_OFFSET(tcl), SCB_LIST_NULL);
5134 ahc_outb(ahc, SCBPTR, saved_scbptr);
5135 } else {
5136 target_offset = TCL_TARGET_OFFSET(tcl);
5137 ahc_outb(ahc, BUSY_TARGETS + target_offset, SCB_LIST_NULL);
5138 }
5139 }
5140
5141 void
5142 ahc_busy_tcl(struct ahc_softc *ahc, u_int tcl, u_int scbid)
5143 {
5144 u_int target_offset;
5145
5146 if ((ahc->flags & AHC_SCB_BTT) != 0) {
5147 u_int saved_scbptr;
5148
5149 saved_scbptr = ahc_inb(ahc, SCBPTR);
5150 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
5151 ahc_outb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl), scbid);
5152 ahc_outb(ahc, SCBPTR, saved_scbptr);
5153 } else {
5154 target_offset = TCL_TARGET_OFFSET(tcl);
5155 ahc_outb(ahc, BUSY_TARGETS + target_offset, scbid);
5156 }
5157 }
5158
5159 /************************** SCB and SCB queue management **********************/
5160 int
5161 ahc_match_scb(struct ahc_softc *ahc, struct scb *scb, int target,
5162 char channel, int lun, u_int tag, role_t role)
5163 {
5164 int targ = SCB_GET_TARGET(ahc, scb);
5165 char chan = SCB_GET_CHANNEL(ahc, scb);
5166 int slun = SCB_GET_LUN(scb);
5167 int match;
5168
5169 match = ((chan == channel) || (channel == ALL_CHANNELS));
5170 if (match != 0)
5171 match = ((targ == target) || (target == CAM_TARGET_WILDCARD));
5172 if (match != 0)
5173 match = ((lun == slun) || (lun == CAM_LUN_WILDCARD));
5174 if (match != 0) {
5175 #ifdef AHC_TARGET_MODE
5176 int group;
5177
5178 group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code);
5179 if (role == ROLE_INITIATOR) {
5180 match = (group != XPT_FC_GROUP_TMODE)
5181 && ((tag == scb->hscb->tag)
5182 || (tag == SCB_LIST_NULL));
5183 } else if (role == ROLE_TARGET) {
5184 match = (group == XPT_FC_GROUP_TMODE)
5185 && ((tag == scb->io_ctx->csio.tag_id)
5186 || (tag == SCB_LIST_NULL));
5187 }
5188 #else /* !AHC_TARGET_MODE */
5189 match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
5190 #endif /* AHC_TARGET_MODE */
5191 }
5192
5193 return match;
5194 }
5195
5196 void
5197 ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
5198 {
5199 int target;
5200 char channel;
5201 int lun;
5202
5203 target = SCB_GET_TARGET(ahc, scb);
5204 lun = SCB_GET_LUN(scb);
5205 channel = SCB_GET_CHANNEL(ahc, scb);
5206
5207 ahc_search_qinfifo(ahc, target, channel, lun,
5208 /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN,
5209 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
5210
5211 ahc_platform_freeze_devq(ahc, scb);
5212 }
5213
5214 void
5215 ahc_qinfifo_requeue_tail(struct ahc_softc *ahc, struct scb *scb)
5216 {
5217 struct scb *prev_scb;
5218
5219 prev_scb = NULL;
5220 if (ahc_qinfifo_count(ahc) != 0) {
5221 u_int prev_tag;
5222 uint8_t prev_pos;
5223
5224 prev_pos = ahc->qinfifonext - 1;
5225 prev_tag = ahc->qinfifo[prev_pos];
5226 prev_scb = ahc_lookup_scb(ahc, prev_tag);
5227 }
5228 ahc_qinfifo_requeue(ahc, prev_scb, scb);
5229 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5230 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
5231 } else {
5232 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
5233 }
5234 }
5235
5236 static void
5237 ahc_qinfifo_requeue(struct ahc_softc *ahc, struct scb *prev_scb,
5238 struct scb *scb)
5239 {
5240 if (prev_scb == NULL) {
5241 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag);
5242 } else {
5243 prev_scb->hscb->next = scb->hscb->tag;
5244 ahc_sync_scb(ahc, prev_scb,
5245 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
5246 }
5247 ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag;
5248 scb->hscb->next = ahc->next_queued_scb->hscb->tag;
5249 ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
5250 }
5251
5252 static int
5253 ahc_qinfifo_count(struct ahc_softc *ahc)
5254 {
5255 uint8_t qinpos;
5256 uint8_t diff;
5257
5258 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5259 qinpos = ahc_inb(ahc, SNSCB_QOFF);
5260 ahc_outb(ahc, SNSCB_QOFF, qinpos);
5261 } else
5262 qinpos = ahc_inb(ahc, QINPOS);
5263 diff = ahc->qinfifonext - qinpos;
5264 return (diff);
5265 }
5266
5267 int
5268 ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel,
5269 int lun, u_int tag, role_t role, uint32_t status,
5270 ahc_search_action action)
5271 {
5272 struct scb *scb;
5273 struct scb *prev_scb;
5274 uint8_t qinstart;
5275 uint8_t qinpos;
5276 uint8_t qintail;
5277 uint8_t next;
5278 uint8_t prev;
5279 uint8_t curscbptr;
5280 int found;
5281 int have_qregs;
5282
5283 qintail = ahc->qinfifonext;
5284 have_qregs = (ahc->features & AHC_QUEUE_REGS) != 0;
5285 if (have_qregs) {
5286 qinstart = ahc_inb(ahc, SNSCB_QOFF);
5287 ahc_outb(ahc, SNSCB_QOFF, qinstart);
5288 } else
5289 qinstart = ahc_inb(ahc, QINPOS);
5290 qinpos = qinstart;
5291 found = 0;
5292 prev_scb = NULL;
5293
5294 if (action == SEARCH_COMPLETE) {
5295 /*
5296 * Don't attempt to run any queued untagged transactions
5297 * until we are done with the abort process.
5298 */
5299 ahc_freeze_untagged_queues(ahc);
5300 }
5301
5302 /*
5303 * Start with an empty queue. Entries that are not chosen
5304 * for removal will be re-added to the queue as we go.
5305 */
5306 ahc->qinfifonext = qinpos;
5307 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag);
5308
5309 while (qinpos != qintail) {
5310 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinpos]);
5311 if (scb == NULL) {
5312 printf("qinpos = %d, SCB index = %d\n",
5313 qinpos, ahc->qinfifo[qinpos]);
5314 panic("Loop 1\n");
5315 }
5316
5317 if (ahc_match_scb(ahc, scb, target, channel, lun, tag, role)) {
5318 /*
5319 * We found an scb that needs to be acted on.
5320 */
5321 found++;
5322 switch (action) {
5323 case SEARCH_COMPLETE:
5324 {
5325 cam_status ostat;
5326 cam_status cstat;
5327
5328 ostat = ahc_get_transaction_status(scb);
5329 if (ostat == CAM_REQ_INPROG)
5330 ahc_set_transaction_status(scb, status);
5331 cstat = ahc_get_transaction_status(scb);
5332 if (cstat != CAM_REQ_CMP)
5333 ahc_freeze_scb(scb);
5334 if ((scb->flags & SCB_ACTIVE) == 0)
5335 printf("Inactive SCB in qinfifo\n");
5336 ahc_done(ahc, scb);
5337
5338 /* FALLTHROUGH */
5339 }
5340 case SEARCH_REMOVE:
5341 break;
5342 case SEARCH_COUNT:
5343 ahc_qinfifo_requeue(ahc, prev_scb, scb);
5344 prev_scb = scb;
5345 break;
5346 }
5347 } else {
5348 ahc_qinfifo_requeue(ahc, prev_scb, scb);
5349 prev_scb = scb;
5350 }
5351 qinpos++;
5352 }
5353
5354 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5355 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
5356 } else {
5357 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
5358 }
5359
5360 if (action != SEARCH_COUNT
5361 && (found != 0)
5362 && (qinstart != ahc->qinfifonext)) {
5363 /*
5364 * The sequencer may be in the process of dmaing
5365 * down the SCB at the beginning of the queue.
5366 * This could be problematic if either the first,
5367 * or the second SCB is removed from the queue
5368 * (the first SCB includes a pointer to the "next"
5369 * SCB to dma). If we have removed any entries, swap
5370 * the first element in the queue with the next HSCB
5371 * so the sequencer will notice that NEXT_QUEUED_SCB
5372 * has changed during its dma attempt and will retry
5373 * the DMA.
5374 */
5375 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinstart]);
5376
5377 if (scb == NULL) {
5378 printf("found = %d, qinstart = %d, qinfifionext = %d\n",
5379 found, qinstart, ahc->qinfifonext);
5380 panic("First/Second Qinfifo fixup\n");
5381 }
5382 /*
5383 * ahc_swap_with_next_hscb forces our next pointer to
5384 * point to the reserved SCB for future commands. Save
5385 * and restore our original next pointer to maintain
5386 * queue integrity.
5387 */
5388 next = scb->hscb->next;
5389 ahc->scb_data->scbindex[scb->hscb->tag] = NULL;
5390 ahc_swap_with_next_hscb(ahc, scb);
5391 scb->hscb->next = next;
5392 ahc->qinfifo[qinstart] = scb->hscb->tag;
5393
5394 /* Tell the card about the new head of the qinfifo. */
5395 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag);
5396
5397 /* Fixup the tail "next" pointer. */
5398 qintail = ahc->qinfifonext - 1;
5399 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qintail]);
5400 scb->hscb->next = ahc->next_queued_scb->hscb->tag;
5401 }
5402
5403 /*
5404 * Search waiting for selection list.
5405 */
5406 curscbptr = ahc_inb(ahc, SCBPTR);
5407 next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */
5408 prev = SCB_LIST_NULL;
5409
5410 while (next != SCB_LIST_NULL) {
5411 uint8_t scb_index;
5412
5413 ahc_outb(ahc, SCBPTR, next);
5414 scb_index = ahc_inb(ahc, SCB_TAG);
5415 if (scb_index >= ahc->scb_data->numscbs) {
5416 printf("Waiting List inconsistency. "
5417 "SCB index == %d, yet numscbs == %d.",
5418 scb_index, ahc->scb_data->numscbs);
5419 ahc_dump_card_state(ahc);
5420 panic("for safety");
5421 }
5422 scb = ahc_lookup_scb(ahc, scb_index);
5423 if (scb == NULL) {
5424 printf("scb_index = %d, next = %d\n",
5425 scb_index, next);
5426 panic("Waiting List traversal\n");
5427 }
5428 if (ahc_match_scb(ahc, scb, target, channel,
5429 lun, SCB_LIST_NULL, role)) {
5430 /*
5431 * We found an scb that needs to be acted on.
5432 */
5433 found++;
5434 switch (action) {
5435 case SEARCH_COMPLETE:
5436 {
5437 cam_status ostat;
5438 cam_status cstat;
5439
5440 ostat = ahc_get_transaction_status(scb);
5441 if (ostat == CAM_REQ_INPROG)
5442 ahc_set_transaction_status(scb,
5443 status);
5444 cstat = ahc_get_transaction_status(scb);
5445 if (cstat != CAM_REQ_CMP)
5446 ahc_freeze_scb(scb);
5447 if ((scb->flags & SCB_ACTIVE) == 0)
5448 printf("Inactive SCB in Waiting List\n");
5449 ahc_done(ahc, scb);
5450 /* FALLTHROUGH */
5451 }
5452 case SEARCH_REMOVE:
5453 next = ahc_rem_wscb(ahc, next, prev);
5454 break;
5455 case SEARCH_COUNT:
5456 prev = next;
5457 next = ahc_inb(ahc, SCB_NEXT);
5458 break;
5459 }
5460 } else {
5461
5462 prev = next;
5463 next = ahc_inb(ahc, SCB_NEXT);
5464 }
5465 }
5466 ahc_outb(ahc, SCBPTR, curscbptr);
5467
5468 found += ahc_search_untagged_queues(ahc, /*ahc_io_ctx_t*/NULL, target,
5469 channel, lun, status, action);
5470
5471 if (action == SEARCH_COMPLETE)
5472 ahc_release_untagged_queues(ahc);
5473 return (found);
5474 }
5475
5476 int
5477 ahc_search_untagged_queues(struct ahc_softc *ahc, ahc_io_ctx_t ctx,
5478 int target, char channel, int lun, uint32_t status,
5479 ahc_search_action action)
5480 {
5481 struct scb *scb;
5482 int maxtarget;
5483 int found;
5484 int i;
5485
5486 if (action == SEARCH_COMPLETE) {
5487 /*
5488 * Don't attempt to run any queued untagged transactions
5489 * until we are done with the abort process.
5490 */
5491 ahc_freeze_untagged_queues(ahc);
5492 }
5493
5494 found = 0;
5495 i = 0;
5496 if ((ahc->flags & AHC_SCB_BTT) == 0) {
5497
5498 maxtarget = 16;
5499 if (target != CAM_TARGET_WILDCARD) {
5500
5501 i = target;
5502 if (channel == 'B')
5503 i += 8;
5504 maxtarget = i + 1;
5505 }
5506 } else {
5507 maxtarget = 0;
5508 }
5509
5510 for (; i < maxtarget; i++) {
5511 struct scb_tailq *untagged_q;
5512 struct scb *next_scb;
5513
5514 untagged_q = &(ahc->untagged_queues[i]);
5515 next_scb = TAILQ_FIRST(untagged_q);
5516 while (next_scb != NULL) {
5517
5518 scb = next_scb;
5519 next_scb = TAILQ_NEXT(scb, links.tqe);
5520
5521 /*
5522 * The head of the list may be the currently
5523 * active untagged command for a device.
5524 * We're only searching for commands that
5525 * have not been started. A transaction
5526 * marked active but still in the qinfifo
5527 * is removed by the qinfifo scanning code
5528 * above.
5529 */
5530 if ((scb->flags & SCB_ACTIVE) != 0)
5531 continue;
5532
5533 if (ahc_match_scb(ahc, scb, target, channel, lun,
5534 SCB_LIST_NULL, ROLE_INITIATOR) == 0
5535 || (ctx != NULL && ctx != scb->io_ctx))
5536 continue;
5537
5538 /*
5539 * We found an scb that needs to be acted on.
5540 */
5541 found++;
5542 switch (action) {
5543 case SEARCH_COMPLETE:
5544 {
5545 cam_status ostat;
5546 cam_status cstat;
5547
5548 ostat = ahc_get_transaction_status(scb);
5549 if (ostat == CAM_REQ_INPROG)
5550 ahc_set_transaction_status(scb, status);
5551 cstat = ahc_get_transaction_status(scb);
5552 if (cstat != CAM_REQ_CMP)
5553 ahc_freeze_scb(scb);
5554 if ((scb->flags & SCB_ACTIVE) == 0)
5555 printf("Inactive SCB in untaggedQ\n");
5556 ahc_done(ahc, scb);
5557 break;
5558 }
5559 case SEARCH_REMOVE:
5560 scb->flags &= ~SCB_UNTAGGEDQ;
5561 TAILQ_REMOVE(untagged_q, scb, links.tqe);
5562 break;
5563 case SEARCH_COUNT:
5564 break;
5565 }
5566 }
5567 }
5568
5569 if (action == SEARCH_COMPLETE)
5570 ahc_release_untagged_queues(ahc);
5571 return (found);
5572 }
5573
5574 int
5575 ahc_search_disc_list(struct ahc_softc *ahc, int target, char channel,
5576 int lun, u_int tag, int stop_on_first, int remove,
5577 int save_state)
5578 {
5579 struct scb *scbp;
5580 u_int next;
5581 u_int prev;
5582 u_int count;
5583 u_int active_scb;
5584
5585 count = 0;
5586 next = ahc_inb(ahc, DISCONNECTED_SCBH);
5587 prev = SCB_LIST_NULL;
5588
5589 if (save_state) {
5590 /* restore this when we're done */
5591 active_scb = ahc_inb(ahc, SCBPTR);
5592 } else
5593 /* Silence compiler */
5594 active_scb = SCB_LIST_NULL;
5595
5596 while (next != SCB_LIST_NULL) {
5597 u_int scb_index;
5598
5599 ahc_outb(ahc, SCBPTR, next);
5600 scb_index = ahc_inb(ahc, SCB_TAG);
5601 if (scb_index >= ahc->scb_data->numscbs) {
5602 printf("Disconnected List inconsistency. "
5603 "SCB index == %d, yet numscbs == %d.",
5604 scb_index, ahc->scb_data->numscbs);
5605 ahc_dump_card_state(ahc);
5606 panic("for safety");
5607 }
5608
5609 if (next == prev) {
5610 panic("Disconnected List Loop. "
5611 "cur SCBPTR == %x, prev SCBPTR == %x.",
5612 next, prev);
5613 }
5614 scbp = ahc_lookup_scb(ahc, scb_index);
5615 if (ahc_match_scb(ahc, scbp, target, channel, lun,
5616 tag, ROLE_INITIATOR)) {
5617 count++;
5618 if (remove) {
5619 next =
5620 ahc_rem_scb_from_disc_list(ahc, prev, next);
5621 } else {
5622 prev = next;
5623 next = ahc_inb(ahc, SCB_NEXT);
5624 }
5625 if (stop_on_first)
5626 break;
5627 } else {
5628 prev = next;
5629 next = ahc_inb(ahc, SCB_NEXT);
5630 }
5631 }
5632 if (save_state)
5633 ahc_outb(ahc, SCBPTR, active_scb);
5634 return (count);
5635 }
5636
5637 /*
5638 * Remove an SCB from the on chip list of disconnected transactions.
5639 * This is empty/unused if we are not performing SCB paging.
5640 */
5641 static u_int
5642 ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, u_int prev, u_int scbptr)
5643 {
5644 u_int next;
5645
5646 ahc_outb(ahc, SCBPTR, scbptr);
5647 next = ahc_inb(ahc, SCB_NEXT);
5648
5649 ahc_outb(ahc, SCB_CONTROL, 0);
5650
5651 ahc_add_curscb_to_free_list(ahc);
5652
5653 if (prev != SCB_LIST_NULL) {
5654 ahc_outb(ahc, SCBPTR, prev);
5655 ahc_outb(ahc, SCB_NEXT, next);
5656 } else
5657 ahc_outb(ahc, DISCONNECTED_SCBH, next);
5658
5659 return (next);
5660 }
5661
5662 /*
5663 * Add the SCB as selected by SCBPTR onto the on chip list of
5664 * free hardware SCBs. This list is empty/unused if we are not
5665 * performing SCB paging.
5666 */
5667 static void
5668 ahc_add_curscb_to_free_list(struct ahc_softc *ahc)
5669 {
5670 /*
5671 * Invalidate the tag so that our abort
5672 * routines don't think it's active.
5673 */
5674 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
5675
5676 if ((ahc->flags & AHC_PAGESCBS) != 0) {
5677 ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH));
5678 ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR));
5679 }
5680 }
5681
5682 /*
5683 * Manipulate the waiting for selection list and return the
5684 * scb that follows the one that we remove.
5685 */
5686 static u_int
5687 ahc_rem_wscb(struct ahc_softc *ahc, u_int scbpos, u_int prev)
5688 {
5689 u_int curscb, next;
5690
5691 /*
5692 * Select the SCB we want to abort and
5693 * pull the next pointer out of it.
5694 */
5695 curscb = ahc_inb(ahc, SCBPTR);
5696 ahc_outb(ahc, SCBPTR, scbpos);
5697 next = ahc_inb(ahc, SCB_NEXT);
5698
5699 /* Clear the necessary fields */
5700 ahc_outb(ahc, SCB_CONTROL, 0);
5701
5702 ahc_add_curscb_to_free_list(ahc);
5703
5704 /* update the waiting list */
5705 if (prev == SCB_LIST_NULL) {
5706 /* First in the list */
5707 ahc_outb(ahc, WAITING_SCBH, next);
5708
5709 /*
5710 * Ensure we aren't attempting to perform
5711 * selection for this entry.
5712 */
5713 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
5714 } else {
5715 /*
5716 * Select the scb that pointed to us
5717 * and update its next pointer.
5718 */
5719 ahc_outb(ahc, SCBPTR, prev);
5720 ahc_outb(ahc, SCB_NEXT, next);
5721 }
5722
5723 /*
5724 * Point us back at the original scb position.
5725 */
5726 ahc_outb(ahc, SCBPTR, curscb);
5727 return next;
5728 }
5729
5730 /******************************** Error Handling ******************************/
5731 /*
5732 * Abort all SCBs that match the given description (target/channel/lun/tag),
5733 * setting their status to the passed in status if the status has not already
5734 * been modified from CAM_REQ_INPROG. This routine assumes that the sequencer
5735 * is paused before it is called.
5736 */
5737 int
5738 ahc_abort_scbs(struct ahc_softc *ahc, int target, char channel,
5739 int lun, u_int tag, role_t role, uint32_t status)
5740 {
5741 struct scb *scbp;
5742 struct scb *scbp_next;
5743 u_int active_scb;
5744 int i, j;
5745 int maxtarget;
5746 int minlun;
5747 int maxlun;
5748
5749 int found;
5750
5751 /*
5752 * Don't attempt to run any queued untagged transactions
5753 * until we are done with the abort process.
5754 */
5755 ahc_freeze_untagged_queues(ahc);
5756
5757 /* restore this when we're done */
5758 active_scb = ahc_inb(ahc, SCBPTR);
5759
5760 found = ahc_search_qinfifo(ahc, target, channel, lun, SCB_LIST_NULL,
5761 role, CAM_REQUEUE_REQ, SEARCH_COMPLETE);
5762
5763 /*
5764 * Clean out the busy target table for any untagged commands.
5765 */
5766 i = 0;
5767 maxtarget = 16;
5768 if (target != CAM_TARGET_WILDCARD) {
5769 i = target;
5770 if (channel == 'B')
5771 i += 8;
5772 maxtarget = i + 1;
5773 }
5774
5775 if (lun == CAM_LUN_WILDCARD) {
5776
5777 /*
5778 * Unless we are using an SCB based
5779 * busy targets table, there is only
5780 * one table entry for all luns of
5781 * a target.
5782 */
5783 minlun = 0;
5784 maxlun = 1;
5785 if ((ahc->flags & AHC_SCB_BTT) != 0)
5786 maxlun = AHC_NUM_LUNS;
5787 } else {
5788 minlun = lun;
5789 maxlun = lun + 1;
5790 }
5791
5792 if (role != ROLE_TARGET) {
5793 for (;i < maxtarget; i++) {
5794 for (j = minlun;j < maxlun; j++) {
5795 u_int scbid;
5796 u_int tcl;
5797
5798 tcl = BUILD_TCL(i << 4, j);
5799 scbid = ahc_index_busy_tcl(ahc, tcl);
5800 scbp = ahc_lookup_scb(ahc, scbid);
5801 if (scbp == NULL
5802 || ahc_match_scb(ahc, scbp, target, channel,
5803 lun, tag, role) == 0)
5804 continue;
5805 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, j));
5806 }
5807 }
5808
5809 /*
5810 * Go through the disconnected list and remove any entries we
5811 * have queued for completion, 0'ing their control byte too.
5812 * We save the active SCB and restore it ourselves, so there
5813 * is no reason for this search to restore it too.
5814 */
5815 ahc_search_disc_list(ahc, target, channel, lun, tag,
5816 /*stop_on_first*/FALSE, /*remove*/TRUE,
5817 /*save_state*/FALSE);
5818 }
5819
5820 /*
5821 * Go through the hardware SCB array looking for commands that
5822 * were active but not on any list. In some cases, these remnants
5823 * might not still have mappings in the scbindex array (e.g. unexpected
5824 * bus free with the same scb queued for an abort). Don't hold this
5825 * against them.
5826 */
5827 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
5828 u_int scbid;
5829
5830 ahc_outb(ahc, SCBPTR, i);
5831 scbid = ahc_inb(ahc, SCB_TAG);
5832 scbp = ahc_lookup_scb(ahc, scbid);
5833 if ((scbp == NULL && scbid != SCB_LIST_NULL)
5834 || (scbp != NULL
5835 && ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)))
5836 ahc_add_curscb_to_free_list(ahc);
5837 }
5838
5839 /*
5840 * Go through the pending CCB list and look for
5841 * commands for this target that are still active.
5842 * These are other tagged commands that were
5843 * disconnected when the reset occurred.
5844 */
5845 scbp_next = LIST_FIRST(&ahc->pending_scbs);
5846 while (scbp_next != NULL) {
5847 scbp = scbp_next;
5848 scbp_next = LIST_NEXT(scbp, pending_links);
5849 if (ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)) {
5850 cam_status ostat;
5851
5852 ostat = ahc_get_transaction_status(scbp);
5853 if (ostat == CAM_REQ_INPROG)
5854 ahc_set_transaction_status(scbp, status);
5855 if (ahc_get_transaction_status(scbp) != CAM_REQ_CMP)
5856 ahc_freeze_scb(scbp);
5857 if ((scbp->flags & SCB_ACTIVE) == 0)
5858 printf("Inactive SCB on pending list\n");
5859 ahc_done(ahc, scbp);
5860 found++;
5861 }
5862 }
5863 ahc_outb(ahc, SCBPTR, active_scb);
5864 ahc_platform_abort_scbs(ahc, target, channel, lun, tag, role, status);
5865 ahc_release_untagged_queues(ahc);
5866 return found;
5867 }
5868
5869 static void
5870 ahc_reset_current_bus(struct ahc_softc *ahc)
5871 {
5872 uint8_t scsiseq;
5873
5874 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST);
5875 scsiseq = ahc_inb(ahc, SCSISEQ);
5876 ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO);
5877 ahc_flush_device_writes(ahc);
5878 ahc_delay(AHC_BUSRESET_DELAY);
5879 /* Turn off the bus reset */
5880 ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO);
5881
5882 ahc_clear_intstat(ahc);
5883
5884 /* Re-enable reset interrupts */
5885 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST);
5886 }
5887
5888 int
5889 ahc_reset_channel(struct ahc_softc *ahc, char channel, int initiate_reset)
5890 {
5891 struct ahc_devinfo devinfo;
5892 u_int initiator, target, max_scsiid;
5893 u_int sblkctl;
5894 u_int scsiseq;
5895 u_int simode1;
5896 int found;
5897 int restart_needed;
5898 char cur_channel;
5899
5900 ahc->pending_device = NULL;
5901
5902 ahc_compile_devinfo(&devinfo,
5903 CAM_TARGET_WILDCARD,
5904 CAM_TARGET_WILDCARD,
5905 CAM_LUN_WILDCARD,
5906 channel, ROLE_UNKNOWN);
5907 ahc_pause(ahc);
5908
5909 /* Make sure the sequencer is in a safe location. */
5910 ahc_clear_critical_section(ahc);
5911
5912 /*
5913 * Run our command complete fifos to ensure that we perform
5914 * completion processing on any commands that 'completed'
5915 * before the reset occurred.
5916 */
5917 ahc_run_qoutfifo(ahc);
5918 #ifdef AHC_TARGET_MODE
5919 /*
5920 * XXX - In Twin mode, the tqinfifo may have commands
5921 * for an unaffected channel in it. However, if
5922 * we have run out of ATIO resources to drain that
5923 * queue, we may not get them all out here. Further,
5924 * the blocked transactions for the reset channel
5925 * should just be killed off, irrespecitve of whether
5926 * we are blocked on ATIO resources. Write a routine
5927 * to compact the tqinfifo appropriately.
5928 */
5929 if ((ahc->flags & AHC_TARGETROLE) != 0) {
5930 ahc_run_tqinfifo(ahc, /*paused*/TRUE);
5931 }
5932 #endif
5933
5934 /*
5935 * Reset the bus if we are initiating this reset
5936 */
5937 sblkctl = ahc_inb(ahc, SBLKCTL);
5938 cur_channel = 'A';
5939 if ((ahc->features & AHC_TWIN) != 0
5940 && ((sblkctl & SELBUSB) != 0))
5941 cur_channel = 'B';
5942 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
5943 if (cur_channel != channel) {
5944 /* Case 1: Command for another bus is active
5945 * Stealthily reset the other bus without
5946 * upsetting the current bus.
5947 */
5948 ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB);
5949 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST);
5950 #ifdef AHC_TARGET_MODE
5951 /*
5952 * Bus resets clear ENSELI, so we cannot
5953 * defer re-enabling bus reset interrupts
5954 * if we are in target mode.
5955 */
5956 if ((ahc->flags & AHC_TARGETROLE) != 0)
5957 simode1 |= ENSCSIRST;
5958 #endif
5959 ahc_outb(ahc, SIMODE1, simode1);
5960 if (initiate_reset)
5961 ahc_reset_current_bus(ahc);
5962 ahc_clear_intstat(ahc);
5963 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP));
5964 ahc_outb(ahc, SBLKCTL, sblkctl);
5965 restart_needed = FALSE;
5966 } else {
5967 /* Case 2: A command from this bus is active or we're idle */
5968 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST);
5969 #ifdef AHC_TARGET_MODE
5970 /*
5971 * Bus resets clear ENSELI, so we cannot
5972 * defer re-enabling bus reset interrupts
5973 * if we are in target mode.
5974 */
5975 if ((ahc->flags & AHC_TARGETROLE) != 0)
5976 simode1 |= ENSCSIRST;
5977 #endif
5978 ahc_outb(ahc, SIMODE1, simode1);
5979 if (initiate_reset)
5980 ahc_reset_current_bus(ahc);
5981 ahc_clear_intstat(ahc);
5982 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP));
5983 restart_needed = TRUE;
5984 }
5985
5986 /*
5987 * Clean up all the state information for the
5988 * pending transactions on this bus.
5989 */
5990 found = ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, channel,
5991 CAM_LUN_WILDCARD, SCB_LIST_NULL,
5992 ROLE_UNKNOWN, CAM_SCSI_BUS_RESET);
5993
5994 max_scsiid = (ahc->features & AHC_WIDE) ? 15 : 7;
5995
5996 #ifdef AHC_TARGET_MODE
5997 /*
5998 * Send an immediate notify ccb to all target more peripheral
5999 * drivers affected by this action.
6000 */
6001 for (target = 0; target <= max_scsiid; target++) {
6002 struct ahc_tmode_tstate* tstate;
6003 u_int lun;
6004
6005 tstate = ahc->enabled_targets[target];
6006 if (tstate == NULL)
6007 continue;
6008 for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
6009 struct ahc_tmode_lstate* lstate;
6010
6011 lstate = tstate->enabled_luns[lun];
6012 if (lstate == NULL)
6013 continue;
6014
6015 ahc_queue_lstate_event(ahc, lstate, CAM_TARGET_WILDCARD,
6016 EVENT_TYPE_BUS_RESET, /*arg*/0);
6017 ahc_send_lstate_events(ahc, lstate);
6018 }
6019 }
6020 #endif
6021 /* Notify the XPT that a bus reset occurred */
6022 ahc_send_async(ahc, devinfo.channel, CAM_TARGET_WILDCARD,
6023 CAM_LUN_WILDCARD, AC_BUS_RESET);
6024
6025 /*
6026 * Revert to async/narrow transfers until we renegotiate.
6027 */
6028 for (target = 0; target <= max_scsiid; target++) {
6029
6030 if (ahc->enabled_targets[target] == NULL)
6031 continue;
6032 for (initiator = 0; initiator <= max_scsiid; initiator++) {
6033 struct ahc_devinfo devinfo;
6034
6035 ahc_compile_devinfo(&devinfo, target, initiator,
6036 CAM_LUN_WILDCARD,
6037 channel, ROLE_UNKNOWN);
6038 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
6039 AHC_TRANS_CUR, /*paused*/TRUE);
6040 ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL,
6041 /*period*/0, /*offset*/0,
6042 /*ppr_options*/0, AHC_TRANS_CUR,
6043 /*paused*/TRUE);
6044 }
6045 }
6046
6047 if (restart_needed)
6048 ahc_restart(ahc);
6049 else
6050 ahc_unpause(ahc);
6051 return found;
6052 }
6053
6054
6055 /***************************** Residual Processing ****************************/
6056 /*
6057 * Calculate the residual for a just completed SCB.
6058 */
6059 void
6060 ahc_calc_residual(struct ahc_softc *ahc, struct scb *scb)
6061 {
6062 struct hardware_scb *hscb;
6063 struct status_pkt *spkt;
6064 uint32_t sgptr;
6065 uint32_t resid_sgptr;
6066 uint32_t resid;
6067
6068 /*
6069 * 5 cases.
6070 * 1) No residual.
6071 * SG_RESID_VALID clear in sgptr.
6072 * 2) Transferless command
6073 * 3) Never performed any transfers.
6074 * sgptr has SG_FULL_RESID set.
6075 * 4) No residual but target did not
6076 * save data pointers after the
6077 * last transfer, so sgptr was
6078 * never updated.
6079 * 5) We have a partial residual.
6080 * Use residual_sgptr to determine
6081 * where we are.
6082 */
6083
6084 hscb = scb->hscb;
6085 sgptr = ahc_le32toh(hscb->sgptr);
6086 if ((sgptr & SG_RESID_VALID) == 0)
6087 /* Case 1 */
6088 return;
6089 sgptr &= ~SG_RESID_VALID;
6090
6091 if ((sgptr & SG_LIST_NULL) != 0)
6092 /* Case 2 */
6093 return;
6094
6095 spkt = &hscb->shared_data.status;
6096 resid_sgptr = ahc_le32toh(spkt->residual_sg_ptr);
6097 if ((sgptr & SG_FULL_RESID) != 0) {
6098 /* Case 3 */
6099 resid = ahc_get_transfer_length(scb);
6100 } else if ((resid_sgptr & SG_LIST_NULL) != 0) {
6101 /* Case 4 */
6102 return;
6103 } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) {
6104 panic("Bogus resid sgptr value 0x%x\n", resid_sgptr);
6105 } else {
6106 struct ahc_dma_seg *sg;
6107
6108 /*
6109 * Remainder of the SG where the transfer
6110 * stopped.
6111 */
6112 resid = ahc_le32toh(spkt->residual_datacnt) & AHC_SG_LEN_MASK;
6113 sg = ahc_sg_bus_to_virt(scb, resid_sgptr & SG_PTR_MASK);
6114
6115 /* The residual sg_ptr always points to the next sg */
6116 sg--;
6117
6118 /*
6119 * Add up the contents of all residual
6120 * SG segments that are after the SG where
6121 * the transfer stopped.
6122 */
6123 while ((ahc_le32toh(sg->len) & AHC_DMA_LAST_SEG) == 0) {
6124 sg++;
6125 resid += ahc_le32toh(sg->len) & AHC_SG_LEN_MASK;
6126 }
6127 }
6128 if ((scb->flags & SCB_SENSE) == 0)
6129 ahc_set_residual(scb, resid);
6130 else
6131 ahc_set_sense_residual(scb, resid);
6132
6133 #ifdef AHC_DEBUG
6134 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
6135 ahc_print_path(ahc, scb);
6136 printf("Handled %sResidual of %d bytes\n",
6137 (scb->flags & SCB_SENSE) ? "Sense " : "", resid);
6138 }
6139 #endif
6140 }
6141
6142 /******************************* Target Mode **********************************/
6143 #ifdef AHC_TARGET_MODE
6144 /*
6145 * Add a target mode event to this lun's queue
6146 */
6147 static void
6148 ahc_queue_lstate_event(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate,
6149 u_int initiator_id, u_int event_type, u_int event_arg)
6150 {
6151 struct ahc_tmode_event *event;
6152 int pending;
6153
6154 xpt_freeze_devq(lstate->path, /*count*/1);
6155 if (lstate->event_w_idx >= lstate->event_r_idx)
6156 pending = lstate->event_w_idx - lstate->event_r_idx;
6157 else
6158 pending = AHC_TMODE_EVENT_BUFFER_SIZE + 1
6159 - (lstate->event_r_idx - lstate->event_w_idx);
6160
6161 if (event_type == EVENT_TYPE_BUS_RESET
6162 || event_type == MSG_BUS_DEV_RESET) {
6163 /*
6164 * Any earlier events are irrelevant, so reset our buffer.
6165 * This has the effect of allowing us to deal with reset
6166 * floods (an external device holding down the reset line)
6167 * without losing the event that is really interesting.
6168 */
6169 lstate->event_r_idx = 0;
6170 lstate->event_w_idx = 0;
6171 xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE);
6172 }
6173
6174 if (pending == AHC_TMODE_EVENT_BUFFER_SIZE) {
6175 xpt_print_path(lstate->path);
6176 printf("immediate event %x:%x lost\n",
6177 lstate->event_buffer[lstate->event_r_idx].event_type,
6178 lstate->event_buffer[lstate->event_r_idx].event_arg);
6179 lstate->event_r_idx++;
6180 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6181 lstate->event_r_idx = 0;
6182 xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE);
6183 }
6184
6185 event = &lstate->event_buffer[lstate->event_w_idx];
6186 event->initiator_id = initiator_id;
6187 event->event_type = event_type;
6188 event->event_arg = event_arg;
6189 lstate->event_w_idx++;
6190 if (lstate->event_w_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6191 lstate->event_w_idx = 0;
6192 }
6193
6194 /*
6195 * Send any target mode events queued up waiting
6196 * for immediate notify resources.
6197 */
6198 void
6199 ahc_send_lstate_events(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate)
6200 {
6201 struct ccb_hdr *ccbh;
6202 struct ccb_immed_notify *inot;
6203
6204 while (lstate->event_r_idx != lstate->event_w_idx
6205 && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) {
6206 struct ahc_tmode_event *event;
6207
6208 event = &lstate->event_buffer[lstate->event_r_idx];
6209 SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle);
6210 inot = (struct ccb_immed_notify *)ccbh;
6211 switch (event->event_type) {
6212 case EVENT_TYPE_BUS_RESET:
6213 ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN;
6214 break;
6215 default:
6216 ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN;
6217 inot->message_args[0] = event->event_type;
6218 inot->message_args[1] = event->event_arg;
6219 break;
6220 }
6221 inot->initiator_id = event->initiator_id;
6222 inot->sense_len = 0;
6223 xpt_done((union ccb *)inot);
6224 lstate->event_r_idx++;
6225 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6226 lstate->event_r_idx = 0;
6227 }
6228 }
6229 #endif
6230
6231 /******************** Sequencer Program Patching/Download *********************/
6232
6233 #ifdef AHC_DUMP_SEQ
6234 void
6235 ahc_dumpseq(struct ahc_softc* ahc)
6236 {
6237 int i;
6238
6239 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
6240 ahc_outb(ahc, SEQADDR0, 0);
6241 ahc_outb(ahc, SEQADDR1, 0);
6242 for (i = 0; i < ahc->instruction_ram_size; i++) {
6243 uint8_t ins_bytes[4];
6244
6245 ahc_insb(ahc, SEQRAM, ins_bytes, 4);
6246 printf("0x%08x\n", ins_bytes[0] << 24
6247 | ins_bytes[1] << 16
6248 | ins_bytes[2] << 8
6249 | ins_bytes[3]);
6250 }
6251 }
6252 #endif
6253
6254 static int
6255 ahc_loadseq(struct ahc_softc *ahc)
6256 {
6257 struct cs cs_table[num_critical_sections];
6258 u_int begin_set[num_critical_sections];
6259 u_int end_set[num_critical_sections];
6260 struct patch *cur_patch;
6261 u_int cs_count;
6262 u_int cur_cs;
6263 u_int i;
6264 u_int skip_addr;
6265 u_int sg_prefetch_cnt;
6266 int downloaded;
6267 uint8_t download_consts[7];
6268
6269 /*
6270 * Start out with 0 critical sections
6271 * that apply to this firmware load.
6272 */
6273 cs_count = 0;
6274 cur_cs = 0;
6275 memset(begin_set, 0, sizeof(begin_set));
6276 memset(end_set, 0, sizeof(end_set));
6277
6278 /* Setup downloadable constant table */
6279 download_consts[QOUTFIFO_OFFSET] = 0;
6280 if (ahc->targetcmds != NULL)
6281 download_consts[QOUTFIFO_OFFSET] += 32;
6282 download_consts[QINFIFO_OFFSET] = download_consts[QOUTFIFO_OFFSET] + 1;
6283 download_consts[CACHESIZE_MASK] = ahc->pci_cachesize - 1;
6284 download_consts[INVERTED_CACHESIZE_MASK] = ~(ahc->pci_cachesize - 1);
6285 sg_prefetch_cnt = ahc->pci_cachesize;
6286 if (sg_prefetch_cnt < (2 * sizeof(struct ahc_dma_seg)))
6287 sg_prefetch_cnt = 2 * sizeof(struct ahc_dma_seg);
6288 download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt;
6289 download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_cnt - 1);
6290 download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_cnt - 1);
6291
6292 cur_patch = patches;
6293 downloaded = 0;
6294 skip_addr = 0;
6295 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
6296 ahc_outb(ahc, SEQADDR0, 0);
6297 ahc_outb(ahc, SEQADDR1, 0);
6298
6299 for (i = 0; i < sizeof(seqprog)/4; i++) {
6300 if (ahc_check_patch(ahc, &cur_patch, i, &skip_addr) == 0) {
6301 /*
6302 * Don't download this instruction as it
6303 * is in a patch that was removed.
6304 */
6305 continue;
6306 }
6307
6308 if (downloaded == ahc->instruction_ram_size) {
6309 /*
6310 * We're about to exceed the instruction
6311 * storage capacity for this chip. Fail
6312 * the load.
6313 */
6314 printf("\n%s: Program too large for instruction memory "
6315 "size of %d!\n", ahc_name(ahc),
6316 ahc->instruction_ram_size);
6317 return (ENOMEM);
6318 }
6319
6320 /*
6321 * Move through the CS table until we find a CS
6322 * that might apply to this instruction.
6323 */
6324 for (; cur_cs < num_critical_sections; cur_cs++) {
6325 if (critical_sections[cur_cs].end <= i) {
6326 if (begin_set[cs_count] == TRUE
6327 && end_set[cs_count] == FALSE) {
6328 cs_table[cs_count].end = downloaded;
6329 end_set[cs_count] = TRUE;
6330 cs_count++;
6331 }
6332 continue;
6333 }
6334 if (critical_sections[cur_cs].begin <= i
6335 && begin_set[cs_count] == FALSE) {
6336 cs_table[cs_count].begin = downloaded;
6337 begin_set[cs_count] = TRUE;
6338 }
6339 break;
6340 }
6341 ahc_download_instr(ahc, i, download_consts);
6342 downloaded++;
6343 }
6344
6345 ahc->num_critical_sections = cs_count;
6346 if (cs_count != 0) {
6347
6348 cs_count *= sizeof(struct cs);
6349 ahc->critical_sections = malloc(cs_count, M_DEVBUF, M_NOWAIT);
6350 if (ahc->critical_sections == NULL)
6351 panic("ahc_loadseq: Could not malloc");
6352 memcpy(ahc->critical_sections, cs_table, cs_count);
6353 }
6354 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE);
6355
6356 if (bootverbose) {
6357 printf(" %d instructions downloaded\n", downloaded);
6358 printf("%s: Features 0x%x, Bugs 0x%x, Flags 0x%x\n",
6359 ahc_name(ahc), ahc->features, ahc->bugs, ahc->flags);
6360 }
6361 return (0);
6362 }
6363
6364 static int
6365 ahc_check_patch(struct ahc_softc *ahc, struct patch **start_patch,
6366 u_int start_instr, u_int *skip_addr)
6367 {
6368 struct patch *cur_patch;
6369 struct patch *last_patch;
6370 u_int num_patches;
6371
6372 num_patches = ARRAY_SIZE(patches);
6373 last_patch = &patches[num_patches];
6374 cur_patch = *start_patch;
6375
6376 while (cur_patch < last_patch && start_instr == cur_patch->begin) {
6377
6378 if (cur_patch->patch_func(ahc) == 0) {
6379
6380 /* Start rejecting code */
6381 *skip_addr = start_instr + cur_patch->skip_instr;
6382 cur_patch += cur_patch->skip_patch;
6383 } else {
6384 /* Accepted this patch. Advance to the next
6385 * one and wait for our intruction pointer to
6386 * hit this point.
6387 */
6388 cur_patch++;
6389 }
6390 }
6391
6392 *start_patch = cur_patch;
6393 if (start_instr < *skip_addr)
6394 /* Still skipping */
6395 return (0);
6396
6397 return (1);
6398 }
6399
6400 static void
6401 ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts)
6402 {
6403 union ins_formats instr;
6404 struct ins_format1 *fmt1_ins;
6405 struct ins_format3 *fmt3_ins;
6406 u_int opcode;
6407
6408 /*
6409 * The firmware is always compiled into a little endian format.
6410 */
6411 instr.integer = ahc_le32toh(*(uint32_t*)&seqprog[instrptr * 4]);
6412
6413 fmt1_ins = &instr.format1;
6414 fmt3_ins = NULL;
6415
6416 /* Pull the opcode */
6417 opcode = instr.format1.opcode;
6418 switch (opcode) {
6419 case AIC_OP_JMP:
6420 case AIC_OP_JC:
6421 case AIC_OP_JNC:
6422 case AIC_OP_CALL:
6423 case AIC_OP_JNE:
6424 case AIC_OP_JNZ:
6425 case AIC_OP_JE:
6426 case AIC_OP_JZ:
6427 {
6428 struct patch *cur_patch;
6429 int address_offset;
6430 u_int address;
6431 u_int skip_addr;
6432 u_int i;
6433
6434 fmt3_ins = &instr.format3;
6435 address_offset = 0;
6436 address = fmt3_ins->address;
6437 cur_patch = patches;
6438 skip_addr = 0;
6439
6440 for (i = 0; i < address;) {
6441
6442 ahc_check_patch(ahc, &cur_patch, i, &skip_addr);
6443
6444 if (skip_addr > i) {
6445 int end_addr;
6446
6447 end_addr = min(address, skip_addr);
6448 address_offset += end_addr - i;
6449 i = skip_addr;
6450 } else {
6451 i++;
6452 }
6453 }
6454 address -= address_offset;
6455 fmt3_ins->address = address;
6456 /* FALLTHROUGH */
6457 }
6458 case AIC_OP_OR:
6459 case AIC_OP_AND:
6460 case AIC_OP_XOR:
6461 case AIC_OP_ADD:
6462 case AIC_OP_ADC:
6463 case AIC_OP_BMOV:
6464 if (fmt1_ins->parity != 0) {
6465 fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
6466 }
6467 fmt1_ins->parity = 0;
6468 if ((ahc->features & AHC_CMD_CHAN) == 0
6469 && opcode == AIC_OP_BMOV) {
6470 /*
6471 * Block move was added at the same time
6472 * as the command channel. Verify that
6473 * this is only a move of a single element
6474 * and convert the BMOV to a MOV
6475 * (AND with an immediate of FF).
6476 */
6477 if (fmt1_ins->immediate != 1)
6478 panic("%s: BMOV not supported\n",
6479 ahc_name(ahc));
6480 fmt1_ins->opcode = AIC_OP_AND;
6481 fmt1_ins->immediate = 0xff;
6482 }
6483 /* FALLTHROUGH */
6484 case AIC_OP_ROL:
6485 if ((ahc->features & AHC_ULTRA2) != 0) {
6486 int i, count;
6487
6488 /* Calculate odd parity for the instruction */
6489 for (i = 0, count = 0; i < 31; i++) {
6490 uint32_t mask;
6491
6492 mask = 0x01 << i;
6493 if ((instr.integer & mask) != 0)
6494 count++;
6495 }
6496 if ((count & 0x01) == 0)
6497 instr.format1.parity = 1;
6498 } else {
6499 /* Compress the instruction for older sequencers */
6500 if (fmt3_ins != NULL) {
6501 instr.integer =
6502 fmt3_ins->immediate
6503 | (fmt3_ins->source << 8)
6504 | (fmt3_ins->address << 16)
6505 | (fmt3_ins->opcode << 25);
6506 } else {
6507 instr.integer =
6508 fmt1_ins->immediate
6509 | (fmt1_ins->source << 8)
6510 | (fmt1_ins->destination << 16)
6511 | (fmt1_ins->ret << 24)
6512 | (fmt1_ins->opcode << 25);
6513 }
6514 }
6515 /* The sequencer is a little endian cpu */
6516 instr.integer = ahc_htole32(instr.integer);
6517 ahc_outsb(ahc, SEQRAM, instr.bytes, 4);
6518 break;
6519 default:
6520 panic("Unknown opcode encountered in seq program");
6521 break;
6522 }
6523 }
6524
6525 int
6526 ahc_print_register(ahc_reg_parse_entry_t *table, u_int num_entries,
6527 const char *name, u_int address, u_int value,
6528 u_int *cur_column, u_int wrap_point)
6529 {
6530 int printed;
6531 u_int printed_mask;
6532
6533 if (cur_column != NULL && *cur_column >= wrap_point) {
6534 printf("\n");
6535 *cur_column = 0;
6536 }
6537 printed = printf("%s[0x%x]", name, value);
6538 if (table == NULL) {
6539 printed += printf(" ");
6540 *cur_column += printed;
6541 return (printed);
6542 }
6543 printed_mask = 0;
6544 while (printed_mask != 0xFF) {
6545 int entry;
6546
6547 for (entry = 0; entry < num_entries; entry++) {
6548 if (((value & table[entry].mask)
6549 != table[entry].value)
6550 || ((printed_mask & table[entry].mask)
6551 == table[entry].mask))
6552 continue;
6553
6554 printed += printf("%s%s",
6555 printed_mask == 0 ? ":(" : "|",
6556 table[entry].name);
6557 printed_mask |= table[entry].mask;
6558
6559 break;
6560 }
6561 if (entry >= num_entries)
6562 break;
6563 }
6564 if (printed_mask != 0)
6565 printed += printf(") ");
6566 else
6567 printed += printf(" ");
6568 if (cur_column != NULL)
6569 *cur_column += printed;
6570 return (printed);
6571 }
6572
6573 void
6574 ahc_dump_card_state(struct ahc_softc *ahc)
6575 {
6576 struct scb *scb;
6577 struct scb_tailq *untagged_q;
6578 u_int cur_col;
6579 int paused;
6580 int target;
6581 int maxtarget;
6582 int i;
6583 uint8_t last_phase;
6584 uint8_t qinpos;
6585 uint8_t qintail;
6586 uint8_t qoutpos;
6587 uint8_t scb_index;
6588 uint8_t saved_scbptr;
6589
6590 if (ahc_is_paused(ahc)) {
6591 paused = 1;
6592 } else {
6593 paused = 0;
6594 ahc_pause(ahc);
6595 }
6596
6597 saved_scbptr = ahc_inb(ahc, SCBPTR);
6598 last_phase = ahc_inb(ahc, LASTPHASE);
6599 printf(">>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<\n"
6600 "%s: Dumping Card State %s, at SEQADDR 0x%x\n",
6601 ahc_name(ahc), ahc_lookup_phase_entry(last_phase)->phasemsg,
6602 ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8));
6603 if (paused)
6604 printf("Card was paused\n");
6605 printf("ACCUM = 0x%x, SINDEX = 0x%x, DINDEX = 0x%x, ARG_2 = 0x%x\n",
6606 ahc_inb(ahc, ACCUM), ahc_inb(ahc, SINDEX), ahc_inb(ahc, DINDEX),
6607 ahc_inb(ahc, ARG_2));
6608 printf("HCNT = 0x%x SCBPTR = 0x%x\n", ahc_inb(ahc, HCNT),
6609 ahc_inb(ahc, SCBPTR));
6610 cur_col = 0;
6611 if ((ahc->features & AHC_DT) != 0)
6612 ahc_scsiphase_print(ahc_inb(ahc, SCSIPHASE), &cur_col, 50);
6613 ahc_scsisigi_print(ahc_inb(ahc, SCSISIGI), &cur_col, 50);
6614 ahc_error_print(ahc_inb(ahc, ERROR), &cur_col, 50);
6615 ahc_scsibusl_print(ahc_inb(ahc, SCSIBUSL), &cur_col, 50);
6616 ahc_lastphase_print(ahc_inb(ahc, LASTPHASE), &cur_col, 50);
6617 ahc_scsiseq_print(ahc_inb(ahc, SCSISEQ), &cur_col, 50);
6618 ahc_sblkctl_print(ahc_inb(ahc, SBLKCTL), &cur_col, 50);
6619 ahc_scsirate_print(ahc_inb(ahc, SCSIRATE), &cur_col, 50);
6620 ahc_seqctl_print(ahc_inb(ahc, SEQCTL), &cur_col, 50);
6621 ahc_seq_flags_print(ahc_inb(ahc, SEQ_FLAGS), &cur_col, 50);
6622 ahc_sstat0_print(ahc_inb(ahc, SSTAT0), &cur_col, 50);
6623 ahc_sstat1_print(ahc_inb(ahc, SSTAT1), &cur_col, 50);
6624 ahc_sstat2_print(ahc_inb(ahc, SSTAT2), &cur_col, 50);
6625 ahc_sstat3_print(ahc_inb(ahc, SSTAT3), &cur_col, 50);
6626 ahc_simode0_print(ahc_inb(ahc, SIMODE0), &cur_col, 50);
6627 ahc_simode1_print(ahc_inb(ahc, SIMODE1), &cur_col, 50);
6628 ahc_sxfrctl0_print(ahc_inb(ahc, SXFRCTL0), &cur_col, 50);
6629 ahc_dfcntrl_print(ahc_inb(ahc, DFCNTRL), &cur_col, 50);
6630 ahc_dfstatus_print(ahc_inb(ahc, DFSTATUS), &cur_col, 50);
6631 if (cur_col != 0)
6632 printf("\n");
6633 printf("STACK:");
6634 for (i = 0; i < STACK_SIZE; i++)
6635 printf(" 0x%x", ahc_inb(ahc, STACK)|(ahc_inb(ahc, STACK) << 8));
6636 printf("\nSCB count = %d\n", ahc->scb_data->numscbs);
6637 printf("Kernel NEXTQSCB = %d\n", ahc->next_queued_scb->hscb->tag);
6638 printf("Card NEXTQSCB = %d\n", ahc_inb(ahc, NEXT_QUEUED_SCB));
6639 /* QINFIFO */
6640 printf("QINFIFO entries: ");
6641 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
6642 qinpos = ahc_inb(ahc, SNSCB_QOFF);
6643 ahc_outb(ahc, SNSCB_QOFF, qinpos);
6644 } else
6645 qinpos = ahc_inb(ahc, QINPOS);
6646 qintail = ahc->qinfifonext;
6647 while (qinpos != qintail) {
6648 printf("%d ", ahc->qinfifo[qinpos]);
6649 qinpos++;
6650 }
6651 printf("\n");
6652
6653 printf("Waiting Queue entries: ");
6654 scb_index = ahc_inb(ahc, WAITING_SCBH);
6655 i = 0;
6656 while (scb_index != SCB_LIST_NULL && i++ < 256) {
6657 ahc_outb(ahc, SCBPTR, scb_index);
6658 printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG));
6659 scb_index = ahc_inb(ahc, SCB_NEXT);
6660 }
6661 printf("\n");
6662
6663 printf("Disconnected Queue entries: ");
6664 scb_index = ahc_inb(ahc, DISCONNECTED_SCBH);
6665 i = 0;
6666 while (scb_index != SCB_LIST_NULL && i++ < 256) {
6667 ahc_outb(ahc, SCBPTR, scb_index);
6668 printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG));
6669 scb_index = ahc_inb(ahc, SCB_NEXT);
6670 }
6671 printf("\n");
6672
6673 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD);
6674 printf("QOUTFIFO entries: ");
6675 qoutpos = ahc->qoutfifonext;
6676 i = 0;
6677 while (ahc->qoutfifo[qoutpos] != SCB_LIST_NULL && i++ < 256) {
6678 printf("%d ", ahc->qoutfifo[qoutpos]);
6679 qoutpos++;
6680 }
6681 printf("\n");
6682
6683 printf("Sequencer Free SCB List: ");
6684 scb_index = ahc_inb(ahc, FREE_SCBH);
6685 i = 0;
6686 while (scb_index != SCB_LIST_NULL && i++ < 256) {
6687 ahc_outb(ahc, SCBPTR, scb_index);
6688 printf("%d ", scb_index);
6689 scb_index = ahc_inb(ahc, SCB_NEXT);
6690 }
6691 printf("\n");
6692
6693 printf("Sequencer SCB Info: ");
6694 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
6695 ahc_outb(ahc, SCBPTR, i);
6696 cur_col = printf("\n%3d ", i);
6697
6698 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), &cur_col, 60);
6699 ahc_scb_scsiid_print(ahc_inb(ahc, SCB_SCSIID), &cur_col, 60);
6700 ahc_scb_lun_print(ahc_inb(ahc, SCB_LUN), &cur_col, 60);
6701 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60);
6702 }
6703 printf("\n");
6704
6705 printf("Pending list: ");
6706 i = 0;
6707 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
6708 if (i++ > 256)
6709 break;
6710 cur_col = printf("\n%3d ", scb->hscb->tag);
6711 ahc_scb_control_print(scb->hscb->control, &cur_col, 60);
6712 ahc_scb_scsiid_print(scb->hscb->scsiid, &cur_col, 60);
6713 ahc_scb_lun_print(scb->hscb->lun, &cur_col, 60);
6714 if ((ahc->flags & AHC_PAGESCBS) == 0) {
6715 ahc_outb(ahc, SCBPTR, scb->hscb->tag);
6716 printf("(");
6717 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL),
6718 &cur_col, 60);
6719 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60);
6720 printf(")");
6721 }
6722 }
6723 printf("\n");
6724
6725 printf("Kernel Free SCB list: ");
6726 i = 0;
6727 SLIST_FOREACH(scb, &ahc->scb_data->free_scbs, links.sle) {
6728 if (i++ > 256)
6729 break;
6730 printf("%d ", scb->hscb->tag);
6731 }
6732 printf("\n");
6733
6734 maxtarget = (ahc->features & (AHC_WIDE|AHC_TWIN)) ? 15 : 7;
6735 for (target = 0; target <= maxtarget; target++) {
6736 untagged_q = &ahc->untagged_queues[target];
6737 if (TAILQ_FIRST(untagged_q) == NULL)
6738 continue;
6739 printf("Untagged Q(%d): ", target);
6740 i = 0;
6741 TAILQ_FOREACH(scb, untagged_q, links.tqe) {
6742 if (i++ > 256)
6743 break;
6744 printf("%d ", scb->hscb->tag);
6745 }
6746 printf("\n");
6747 }
6748
6749 ahc_platform_dump_card_state(ahc);
6750 printf("\n<<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>\n");
6751 ahc_outb(ahc, SCBPTR, saved_scbptr);
6752 if (paused == 0)
6753 ahc_unpause(ahc);
6754 }
6755
6756 /************************* Target Mode ****************************************/
6757 #ifdef AHC_TARGET_MODE
6758 cam_status
6759 ahc_find_tmode_devs(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb,
6760 struct ahc_tmode_tstate **tstate,
6761 struct ahc_tmode_lstate **lstate,
6762 int notfound_failure)
6763 {
6764
6765 if ((ahc->features & AHC_TARGETMODE) == 0)
6766 return (CAM_REQ_INVALID);
6767
6768 /*
6769 * Handle the 'black hole' device that sucks up
6770 * requests to unattached luns on enabled targets.
6771 */
6772 if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD
6773 && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) {
6774 *tstate = NULL;
6775 *lstate = ahc->black_hole;
6776 } else {
6777 u_int max_id;
6778
6779 max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
6780 if (ccb->ccb_h.target_id >= max_id)
6781 return (CAM_TID_INVALID);
6782
6783 if (ccb->ccb_h.target_lun >= AHC_NUM_LUNS)
6784 return (CAM_LUN_INVALID);
6785
6786 *tstate = ahc->enabled_targets[ccb->ccb_h.target_id];
6787 *lstate = NULL;
6788 if (*tstate != NULL)
6789 *lstate =
6790 (*tstate)->enabled_luns[ccb->ccb_h.target_lun];
6791 }
6792
6793 if (notfound_failure != 0 && *lstate == NULL)
6794 return (CAM_PATH_INVALID);
6795
6796 return (CAM_REQ_CMP);
6797 }
6798
6799 void
6800 ahc_handle_en_lun(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb)
6801 {
6802 struct ahc_tmode_tstate *tstate;
6803 struct ahc_tmode_lstate *lstate;
6804 struct ccb_en_lun *cel;
6805 cam_status status;
6806 u_long s;
6807 u_int target;
6808 u_int lun;
6809 u_int target_mask;
6810 u_int our_id;
6811 int error;
6812 char channel;
6813
6814 status = ahc_find_tmode_devs(ahc, sim, ccb, &tstate, &lstate,
6815 /*notfound_failure*/FALSE);
6816
6817 if (status != CAM_REQ_CMP) {
6818 ccb->ccb_h.status = status;
6819 return;
6820 }
6821
6822 if (cam_sim_bus(sim) == 0)
6823 our_id = ahc->our_id;
6824 else
6825 our_id = ahc->our_id_b;
6826
6827 if (ccb->ccb_h.target_id != our_id) {
6828 /*
6829 * our_id represents our initiator ID, or
6830 * the ID of the first target to have an
6831 * enabled lun in target mode. There are
6832 * two cases that may preclude enabling a
6833 * target id other than our_id.
6834 *
6835 * o our_id is for an active initiator role.
6836 * Since the hardware does not support
6837 * reselections to the initiator role at
6838 * anything other than our_id, and our_id
6839 * is used by the hardware to indicate the
6840 * ID to use for both select-out and
6841 * reselect-out operations, the only target
6842 * ID we can support in this mode is our_id.
6843 *
6844 * o The MULTARGID feature is not available and
6845 * a previous target mode ID has been enabled.
6846 */
6847 if ((ahc->features & AHC_MULTIROLE) != 0) {
6848
6849 if ((ahc->features & AHC_MULTI_TID) != 0
6850 && (ahc->flags & AHC_INITIATORROLE) != 0) {
6851 /*
6852 * Only allow additional targets if
6853 * the initiator role is disabled.
6854 * The hardware cannot handle a re-select-in
6855 * on the initiator id during a re-select-out
6856 * on a different target id.
6857 */
6858 status = CAM_TID_INVALID;
6859 } else if ((ahc->flags & AHC_INITIATORROLE) != 0
6860 || ahc->enabled_luns > 0) {
6861 /*
6862 * Only allow our target id to change
6863 * if the initiator role is not configured
6864 * and there are no enabled luns which
6865 * are attached to the currently registered
6866 * scsi id.
6867 */
6868 status = CAM_TID_INVALID;
6869 }
6870 } else if ((ahc->features & AHC_MULTI_TID) == 0
6871 && ahc->enabled_luns > 0) {
6872
6873 status = CAM_TID_INVALID;
6874 }
6875 }
6876
6877 if (status != CAM_REQ_CMP) {
6878 ccb->ccb_h.status = status;
6879 return;
6880 }
6881
6882 /*
6883 * We now have an id that is valid.
6884 * If we aren't in target mode, switch modes.
6885 */
6886 if ((ahc->flags & AHC_TARGETROLE) == 0
6887 && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) {
6888 u_long s;
6889 ahc_flag saved_flags;
6890
6891 printf("Configuring Target Mode\n");
6892 ahc_lock(ahc, &s);
6893 if (LIST_FIRST(&ahc->pending_scbs) != NULL) {
6894 ccb->ccb_h.status = CAM_BUSY;
6895 ahc_unlock(ahc, &s);
6896 return;
6897 }
6898 saved_flags = ahc->flags;
6899 ahc->flags |= AHC_TARGETROLE;
6900 if ((ahc->features & AHC_MULTIROLE) == 0)
6901 ahc->flags &= ~AHC_INITIATORROLE;
6902 ahc_pause(ahc);
6903 error = ahc_loadseq(ahc);
6904 if (error != 0) {
6905 /*
6906 * Restore original configuration and notify
6907 * the caller that we cannot support target mode.
6908 * Since the adapter started out in this
6909 * configuration, the firmware load will succeed,
6910 * so there is no point in checking ahc_loadseq's
6911 * return value.
6912 */
6913 ahc->flags = saved_flags;
6914 (void)ahc_loadseq(ahc);
6915 ahc_restart(ahc);
6916 ahc_unlock(ahc, &s);
6917 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
6918 return;
6919 }
6920 ahc_restart(ahc);
6921 ahc_unlock(ahc, &s);
6922 }
6923 cel = &ccb->cel;
6924 target = ccb->ccb_h.target_id;
6925 lun = ccb->ccb_h.target_lun;
6926 channel = SIM_CHANNEL(ahc, sim);
6927 target_mask = 0x01 << target;
6928 if (channel == 'B')
6929 target_mask <<= 8;
6930
6931 if (cel->enable != 0) {
6932 u_int scsiseq;
6933
6934 /* Are we already enabled?? */
6935 if (lstate != NULL) {
6936 xpt_print_path(ccb->ccb_h.path);
6937 printf("Lun already enabled\n");
6938 ccb->ccb_h.status = CAM_LUN_ALRDY_ENA;
6939 return;
6940 }
6941
6942 if (cel->grp6_len != 0
6943 || cel->grp7_len != 0) {
6944 /*
6945 * Don't (yet?) support vendor
6946 * specific commands.
6947 */
6948 ccb->ccb_h.status = CAM_REQ_INVALID;
6949 printf("Non-zero Group Codes\n");
6950 return;
6951 }
6952
6953 /*
6954 * Seems to be okay.
6955 * Setup our data structures.
6956 */
6957 if (target != CAM_TARGET_WILDCARD && tstate == NULL) {
6958 tstate = ahc_alloc_tstate(ahc, target, channel);
6959 if (tstate == NULL) {
6960 xpt_print_path(ccb->ccb_h.path);
6961 printf("Couldn't allocate tstate\n");
6962 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
6963 return;
6964 }
6965 }
6966 lstate = malloc(sizeof(*lstate), M_DEVBUF, M_NOWAIT);
6967 if (lstate == NULL) {
6968 xpt_print_path(ccb->ccb_h.path);
6969 printf("Couldn't allocate lstate\n");
6970 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
6971 return;
6972 }
6973 memset(lstate, 0, sizeof(*lstate));
6974 status = xpt_create_path(&lstate->path, /*periph*/NULL,
6975 xpt_path_path_id(ccb->ccb_h.path),
6976 xpt_path_target_id(ccb->ccb_h.path),
6977 xpt_path_lun_id(ccb->ccb_h.path));
6978 if (status != CAM_REQ_CMP) {
6979 free(lstate, M_DEVBUF);
6980 xpt_print_path(ccb->ccb_h.path);
6981 printf("Couldn't allocate path\n");
6982 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
6983 return;
6984 }
6985 SLIST_INIT(&lstate->accept_tios);
6986 SLIST_INIT(&lstate->immed_notifies);
6987 ahc_lock(ahc, &s);
6988 ahc_pause(ahc);
6989 if (target != CAM_TARGET_WILDCARD) {
6990 tstate->enabled_luns[lun] = lstate;
6991 ahc->enabled_luns++;
6992
6993 if ((ahc->features & AHC_MULTI_TID) != 0) {
6994 u_int targid_mask;
6995
6996 targid_mask = ahc_inb(ahc, TARGID)
6997 | (ahc_inb(ahc, TARGID + 1) << 8);
6998
6999 targid_mask |= target_mask;
7000 ahc_outb(ahc, TARGID, targid_mask);
7001 ahc_outb(ahc, TARGID+1, (targid_mask >> 8));
7002
7003 ahc_update_scsiid(ahc, targid_mask);
7004 } else {
7005 u_int our_id;
7006 char channel;
7007
7008 channel = SIM_CHANNEL(ahc, sim);
7009 our_id = SIM_SCSI_ID(ahc, sim);
7010
7011 /*
7012 * This can only happen if selections
7013 * are not enabled
7014 */
7015 if (target != our_id) {
7016 u_int sblkctl;
7017 char cur_channel;
7018 int swap;
7019
7020 sblkctl = ahc_inb(ahc, SBLKCTL);
7021 cur_channel = (sblkctl & SELBUSB)
7022 ? 'B' : 'A';
7023 if ((ahc->features & AHC_TWIN) == 0)
7024 cur_channel = 'A';
7025 swap = cur_channel != channel;
7026 if (channel == 'A')
7027 ahc->our_id = target;
7028 else
7029 ahc->our_id_b = target;
7030
7031 if (swap)
7032 ahc_outb(ahc, SBLKCTL,
7033 sblkctl ^ SELBUSB);
7034
7035 ahc_outb(ahc, SCSIID, target);
7036
7037 if (swap)
7038 ahc_outb(ahc, SBLKCTL, sblkctl);
7039 }
7040 }
7041 } else
7042 ahc->black_hole = lstate;
7043 /* Allow select-in operations */
7044 if (ahc->black_hole != NULL && ahc->enabled_luns > 0) {
7045 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
7046 scsiseq |= ENSELI;
7047 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq);
7048 scsiseq = ahc_inb(ahc, SCSISEQ);
7049 scsiseq |= ENSELI;
7050 ahc_outb(ahc, SCSISEQ, scsiseq);
7051 }
7052 ahc_unpause(ahc);
7053 ahc_unlock(ahc, &s);
7054 ccb->ccb_h.status = CAM_REQ_CMP;
7055 xpt_print_path(ccb->ccb_h.path);
7056 printf("Lun now enabled for target mode\n");
7057 } else {
7058 struct scb *scb;
7059 int i, empty;
7060
7061 if (lstate == NULL) {
7062 ccb->ccb_h.status = CAM_LUN_INVALID;
7063 return;
7064 }
7065
7066 ahc_lock(ahc, &s);
7067
7068 ccb->ccb_h.status = CAM_REQ_CMP;
7069 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
7070 struct ccb_hdr *ccbh;
7071
7072 ccbh = &scb->io_ctx->ccb_h;
7073 if (ccbh->func_code == XPT_CONT_TARGET_IO
7074 && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){
7075 printf("CTIO pending\n");
7076 ccb->ccb_h.status = CAM_REQ_INVALID;
7077 ahc_unlock(ahc, &s);
7078 return;
7079 }
7080 }
7081
7082 if (SLIST_FIRST(&lstate->accept_tios) != NULL) {
7083 printf("ATIOs pending\n");
7084 ccb->ccb_h.status = CAM_REQ_INVALID;
7085 }
7086
7087 if (SLIST_FIRST(&lstate->immed_notifies) != NULL) {
7088 printf("INOTs pending\n");
7089 ccb->ccb_h.status = CAM_REQ_INVALID;
7090 }
7091
7092 if (ccb->ccb_h.status != CAM_REQ_CMP) {
7093 ahc_unlock(ahc, &s);
7094 return;
7095 }
7096
7097 xpt_print_path(ccb->ccb_h.path);
7098 printf("Target mode disabled\n");
7099 xpt_free_path(lstate->path);
7100 free(lstate, M_DEVBUF);
7101
7102 ahc_pause(ahc);
7103 /* Can we clean up the target too? */
7104 if (target != CAM_TARGET_WILDCARD) {
7105 tstate->enabled_luns[lun] = NULL;
7106 ahc->enabled_luns--;
7107 for (empty = 1, i = 0; i < 8; i++)
7108 if (tstate->enabled_luns[i] != NULL) {
7109 empty = 0;
7110 break;
7111 }
7112
7113 if (empty) {
7114 ahc_free_tstate(ahc, target, channel,
7115 /*force*/FALSE);
7116 if (ahc->features & AHC_MULTI_TID) {
7117 u_int targid_mask;
7118
7119 targid_mask = ahc_inb(ahc, TARGID)
7120 | (ahc_inb(ahc, TARGID + 1)
7121 << 8);
7122
7123 targid_mask &= ~target_mask;
7124 ahc_outb(ahc, TARGID, targid_mask);
7125 ahc_outb(ahc, TARGID+1,
7126 (targid_mask >> 8));
7127 ahc_update_scsiid(ahc, targid_mask);
7128 }
7129 }
7130 } else {
7131
7132 ahc->black_hole = NULL;
7133
7134 /*
7135 * We can't allow selections without
7136 * our black hole device.
7137 */
7138 empty = TRUE;
7139 }
7140 if (ahc->enabled_luns == 0) {
7141 /* Disallow select-in */
7142 u_int scsiseq;
7143
7144 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
7145 scsiseq &= ~ENSELI;
7146 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq);
7147 scsiseq = ahc_inb(ahc, SCSISEQ);
7148 scsiseq &= ~ENSELI;
7149 ahc_outb(ahc, SCSISEQ, scsiseq);
7150
7151 if ((ahc->features & AHC_MULTIROLE) == 0) {
7152 printf("Configuring Initiator Mode\n");
7153 ahc->flags &= ~AHC_TARGETROLE;
7154 ahc->flags |= AHC_INITIATORROLE;
7155 /*
7156 * Returning to a configuration that
7157 * fit previously will always succeed.
7158 */
7159 (void)ahc_loadseq(ahc);
7160 ahc_restart(ahc);
7161 /*
7162 * Unpaused. The extra unpause
7163 * that follows is harmless.
7164 */
7165 }
7166 }
7167 ahc_unpause(ahc);
7168 ahc_unlock(ahc, &s);
7169 }
7170 }
7171
7172 static void
7173 ahc_update_scsiid(struct ahc_softc *ahc, u_int targid_mask)
7174 {
7175 u_int scsiid_mask;
7176 u_int scsiid;
7177
7178 if ((ahc->features & AHC_MULTI_TID) == 0)
7179 panic("ahc_update_scsiid called on non-multitid unit\n");
7180
7181 /*
7182 * Since we will rely on the TARGID mask
7183 * for selection enables, ensure that OID
7184 * in SCSIID is not set to some other ID
7185 * that we don't want to allow selections on.
7186 */
7187 if ((ahc->features & AHC_ULTRA2) != 0)
7188 scsiid = ahc_inb(ahc, SCSIID_ULTRA2);
7189 else
7190 scsiid = ahc_inb(ahc, SCSIID);
7191 scsiid_mask = 0x1 << (scsiid & OID);
7192 if ((targid_mask & scsiid_mask) == 0) {
7193 u_int our_id;
7194
7195 /* ffs counts from 1 */
7196 our_id = ffs(targid_mask);
7197 if (our_id == 0)
7198 our_id = ahc->our_id;
7199 else
7200 our_id--;
7201 scsiid &= TID;
7202 scsiid |= our_id;
7203 }
7204 if ((ahc->features & AHC_ULTRA2) != 0)
7205 ahc_outb(ahc, SCSIID_ULTRA2, scsiid);
7206 else
7207 ahc_outb(ahc, SCSIID, scsiid);
7208 }
7209
7210 void
7211 ahc_run_tqinfifo(struct ahc_softc *ahc, int paused)
7212 {
7213 struct target_cmd *cmd;
7214
7215 /*
7216 * If the card supports auto-access pause,
7217 * we can access the card directly regardless
7218 * of whether it is paused or not.
7219 */
7220 if ((ahc->features & AHC_AUTOPAUSE) != 0)
7221 paused = TRUE;
7222
7223 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_POSTREAD);
7224 while ((cmd = &ahc->targetcmds[ahc->tqinfifonext])->cmd_valid != 0) {
7225
7226 /*
7227 * Only advance through the queue if we
7228 * have the resources to process the command.
7229 */
7230 if (ahc_handle_target_cmd(ahc, cmd) != 0)
7231 break;
7232
7233 cmd->cmd_valid = 0;
7234 ahc_dmamap_sync(ahc, ahc->shared_data_dmat,
7235 ahc->shared_data_dmamap,
7236 ahc_targetcmd_offset(ahc, ahc->tqinfifonext),
7237 sizeof(struct target_cmd),
7238 BUS_DMASYNC_PREREAD);
7239 ahc->tqinfifonext++;
7240
7241 /*
7242 * Lazily update our position in the target mode incoming
7243 * command queue as seen by the sequencer.
7244 */
7245 if ((ahc->tqinfifonext & (HOST_TQINPOS - 1)) == 1) {
7246 if ((ahc->features & AHC_HS_MAILBOX) != 0) {
7247 u_int hs_mailbox;
7248
7249 hs_mailbox = ahc_inb(ahc, HS_MAILBOX);
7250 hs_mailbox &= ~HOST_TQINPOS;
7251 hs_mailbox |= ahc->tqinfifonext & HOST_TQINPOS;
7252 ahc_outb(ahc, HS_MAILBOX, hs_mailbox);
7253 } else {
7254 if (!paused)
7255 ahc_pause(ahc);
7256 ahc_outb(ahc, KERNEL_TQINPOS,
7257 ahc->tqinfifonext & HOST_TQINPOS);
7258 if (!paused)
7259 ahc_unpause(ahc);
7260 }
7261 }
7262 }
7263 }
7264
7265 static int
7266 ahc_handle_target_cmd(struct ahc_softc *ahc, struct target_cmd *cmd)
7267 {
7268 struct ahc_tmode_tstate *tstate;
7269 struct ahc_tmode_lstate *lstate;
7270 struct ccb_accept_tio *atio;
7271 uint8_t *byte;
7272 int initiator;
7273 int target;
7274 int lun;
7275
7276 initiator = SCSIID_TARGET(ahc, cmd->scsiid);
7277 target = SCSIID_OUR_ID(cmd->scsiid);
7278 lun = (cmd->identify & MSG_IDENTIFY_LUNMASK);
7279
7280 byte = cmd->bytes;
7281 tstate = ahc->enabled_targets[target];
7282 lstate = NULL;
7283 if (tstate != NULL)
7284 lstate = tstate->enabled_luns[lun];
7285
7286 /*
7287 * Commands for disabled luns go to the black hole driver.
7288 */
7289 if (lstate == NULL)
7290 lstate = ahc->black_hole;
7291
7292 atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios);
7293 if (atio == NULL) {
7294 ahc->flags |= AHC_TQINFIFO_BLOCKED;
7295 /*
7296 * Wait for more ATIOs from the peripheral driver for this lun.
7297 */
7298 if (bootverbose)
7299 printf("%s: ATIOs exhausted\n", ahc_name(ahc));
7300 return (1);
7301 } else
7302 ahc->flags &= ~AHC_TQINFIFO_BLOCKED;
7303 #if 0
7304 printf("Incoming command from %d for %d:%d%s\n",
7305 initiator, target, lun,
7306 lstate == ahc->black_hole ? "(Black Holed)" : "");
7307 #endif
7308 SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle);
7309
7310 if (lstate == ahc->black_hole) {
7311 /* Fill in the wildcards */
7312 atio->ccb_h.target_id = target;
7313 atio->ccb_h.target_lun = lun;
7314 }
7315
7316 /*
7317 * Package it up and send it off to
7318 * whomever has this lun enabled.
7319 */
7320 atio->sense_len = 0;
7321 atio->init_id = initiator;
7322 if (byte[0] != 0xFF) {
7323 /* Tag was included */
7324 atio->tag_action = *byte++;
7325 atio->tag_id = *byte++;
7326 atio->ccb_h.flags = CAM_TAG_ACTION_VALID;
7327 } else {
7328 atio->ccb_h.flags = 0;
7329 }
7330 byte++;
7331
7332 /* Okay. Now determine the cdb size based on the command code */
7333 switch (*byte >> CMD_GROUP_CODE_SHIFT) {
7334 case 0:
7335 atio->cdb_len = 6;
7336 break;
7337 case 1:
7338 case 2:
7339 atio->cdb_len = 10;
7340 break;
7341 case 4:
7342 atio->cdb_len = 16;
7343 break;
7344 case 5:
7345 atio->cdb_len = 12;
7346 break;
7347 case 3:
7348 default:
7349 /* Only copy the opcode. */
7350 atio->cdb_len = 1;
7351 printf("Reserved or VU command code type encountered\n");
7352 break;
7353 }
7354
7355 memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len);
7356
7357 atio->ccb_h.status |= CAM_CDB_RECVD;
7358
7359 if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) {
7360 /*
7361 * We weren't allowed to disconnect.
7362 * We're hanging on the bus until a
7363 * continue target I/O comes in response
7364 * to this accept tio.
7365 */
7366 #if 0
7367 printf("Received Immediate Command %d:%d:%d - %p\n",
7368 initiator, target, lun, ahc->pending_device);
7369 #endif
7370 ahc->pending_device = lstate;
7371 ahc_freeze_ccb((union ccb *)atio);
7372 atio->ccb_h.flags |= CAM_DIS_DISCONNECT;
7373 }
7374 xpt_done((union ccb*)atio);
7375 return (0);
7376 }
7377
7378 #endif
linux v2.6.22.y-op