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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / scsi / aic7xxx / aic79xx_core.c
blob137fb1a37dd172c3f64bade86779689fdf3639fc
1 /*
2 * Core routines and tables shareable across OS platforms.
3 *
4 * Copyright (c) 1994-2002 Justin T. Gibbs.
5 * Copyright (c) 2000-2003 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/aic79xx.c#202 $
41 *
42 * $FreeBSD$
43 */
44
45 #ifdef __linux__
46 #include "aic79xx_osm.h"
47 #include "aic79xx_inline.h"
48 #include "aicasm/aicasm_insformat.h"
49 #else
50 #include <dev/aic7xxx/aic79xx_osm.h>
51 #include <dev/aic7xxx/aic79xx_inline.h>
52 #include <dev/aic7xxx/aicasm/aicasm_insformat.h>
53 #endif
54
55 /******************************** Globals *************************************/
56 struct ahd_softc_tailq ahd_tailq = TAILQ_HEAD_INITIALIZER(ahd_tailq);
57
58 /***************************** Lookup Tables **********************************/
59 char *ahd_chip_names[] =
60 {
61 "NONE",
62 "aic7901",
63 "aic7902",
64 "aic7901A"
65 };
66 static const u_int num_chip_names = NUM_ELEMENTS(ahd_chip_names);
67
68 /*
69 * Hardware error codes.
70 */
71 struct ahd_hard_error_entry {
72 uint8_t errno;
73 char *errmesg;
74 };
75
76 static struct ahd_hard_error_entry ahd_hard_errors[] = {
77 { DSCTMOUT, "Discard Timer has timed out" },
78 { ILLOPCODE, "Illegal Opcode in sequencer program" },
79 { SQPARERR, "Sequencer Parity Error" },
80 { DPARERR, "Data-path Parity Error" },
81 { MPARERR, "Scratch or SCB Memory Parity Error" },
82 { CIOPARERR, "CIOBUS Parity Error" },
83 };
84 static const u_int num_errors = NUM_ELEMENTS(ahd_hard_errors);
85
86 static struct ahd_phase_table_entry ahd_phase_table[] =
87 {
88 { P_DATAOUT, MSG_NOOP, "in Data-out phase" },
89 { P_DATAIN, MSG_INITIATOR_DET_ERR, "in Data-in phase" },
90 { P_DATAOUT_DT, MSG_NOOP, "in DT Data-out phase" },
91 { P_DATAIN_DT, MSG_INITIATOR_DET_ERR, "in DT Data-in phase" },
92 { P_COMMAND, MSG_NOOP, "in Command phase" },
93 { P_MESGOUT, MSG_NOOP, "in Message-out phase" },
94 { P_STATUS, MSG_INITIATOR_DET_ERR, "in Status phase" },
95 { P_MESGIN, MSG_PARITY_ERROR, "in Message-in phase" },
96 { P_BUSFREE, MSG_NOOP, "while idle" },
97 { 0, MSG_NOOP, "in unknown phase" }
98 };
99
100 /*
101 * In most cases we only wish to itterate over real phases, so
102 * exclude the last element from the count.
103 */
104 static const u_int num_phases = NUM_ELEMENTS(ahd_phase_table) - 1;
105
106 /* Our Sequencer Program */
107 #include "aic79xx_seq.h"
108
109 /**************************** Function Declarations ***************************/
110 static void ahd_handle_transmission_error(struct ahd_softc *ahd);
111 static void ahd_handle_lqiphase_error(struct ahd_softc *ahd,
112 u_int lqistat1);
113 static int ahd_handle_pkt_busfree(struct ahd_softc *ahd,
114 u_int busfreetime);
115 static int ahd_handle_nonpkt_busfree(struct ahd_softc *ahd);
116 static void ahd_handle_proto_violation(struct ahd_softc *ahd);
117 static void ahd_force_renegotiation(struct ahd_softc *ahd,
118 struct ahd_devinfo *devinfo);
119
120 static struct ahd_tmode_tstate*
121 ahd_alloc_tstate(struct ahd_softc *ahd,
122 u_int scsi_id, char channel);
123 #ifdef AHD_TARGET_MODE
124 static void ahd_free_tstate(struct ahd_softc *ahd,
125 u_int scsi_id, char channel, int force);
126 #endif
127 static void ahd_devlimited_syncrate(struct ahd_softc *ahd,
128 struct ahd_initiator_tinfo *,
129 u_int *period,
130 u_int *ppr_options,
131 role_t role);
132 static void ahd_update_neg_table(struct ahd_softc *ahd,
133 struct ahd_devinfo *devinfo,
134 struct ahd_transinfo *tinfo);
135 static void ahd_update_pending_scbs(struct ahd_softc *ahd);
136 static void ahd_fetch_devinfo(struct ahd_softc *ahd,
137 struct ahd_devinfo *devinfo);
138 static void ahd_scb_devinfo(struct ahd_softc *ahd,
139 struct ahd_devinfo *devinfo,
140 struct scb *scb);
141 static void ahd_setup_initiator_msgout(struct ahd_softc *ahd,
142 struct ahd_devinfo *devinfo,
143 struct scb *scb);
144 static void ahd_build_transfer_msg(struct ahd_softc *ahd,
145 struct ahd_devinfo *devinfo);
146 static void ahd_construct_sdtr(struct ahd_softc *ahd,
147 struct ahd_devinfo *devinfo,
148 u_int period, u_int offset);
149 static void ahd_construct_wdtr(struct ahd_softc *ahd,
150 struct ahd_devinfo *devinfo,
151 u_int bus_width);
152 static void ahd_construct_ppr(struct ahd_softc *ahd,
153 struct ahd_devinfo *devinfo,
154 u_int period, u_int offset,
155 u_int bus_width, u_int ppr_options);
156 static void ahd_clear_msg_state(struct ahd_softc *ahd);
157 static void ahd_handle_message_phase(struct ahd_softc *ahd);
158 typedef enum {
159 AHDMSG_1B,
160 AHDMSG_2B,
161 AHDMSG_EXT
162 } ahd_msgtype;
163 static int ahd_sent_msg(struct ahd_softc *ahd, ahd_msgtype type,
164 u_int msgval, int full);
165 static int ahd_parse_msg(struct ahd_softc *ahd,
166 struct ahd_devinfo *devinfo);
167 static int ahd_handle_msg_reject(struct ahd_softc *ahd,
168 struct ahd_devinfo *devinfo);
169 static void ahd_handle_ign_wide_residue(struct ahd_softc *ahd,
170 struct ahd_devinfo *devinfo);
171 static void ahd_reinitialize_dataptrs(struct ahd_softc *ahd);
172 static void ahd_handle_devreset(struct ahd_softc *ahd,
173 struct ahd_devinfo *devinfo,
174 u_int lun, cam_status status,
175 char *message, int verbose_level);
176 #ifdef AHD_TARGET_MODE
177 static void ahd_setup_target_msgin(struct ahd_softc *ahd,
178 struct ahd_devinfo *devinfo,
179 struct scb *scb);
180 #endif
181
182 static u_int ahd_sglist_size(struct ahd_softc *ahd);
183 static u_int ahd_sglist_allocsize(struct ahd_softc *ahd);
184 static bus_dmamap_callback_t
185 ahd_dmamap_cb;
186 static void ahd_initialize_hscbs(struct ahd_softc *ahd);
187 static int ahd_init_scbdata(struct ahd_softc *ahd);
188 static void ahd_fini_scbdata(struct ahd_softc *ahd);
189 static void ahd_setup_iocell_workaround(struct ahd_softc *ahd);
190 static void ahd_iocell_first_selection(struct ahd_softc *ahd);
191 static void ahd_add_col_list(struct ahd_softc *ahd,
192 struct scb *scb, u_int col_idx);
193 static void ahd_rem_col_list(struct ahd_softc *ahd,
194 struct scb *scb);
195 static void ahd_chip_init(struct ahd_softc *ahd);
196 static void ahd_qinfifo_requeue(struct ahd_softc *ahd,
197 struct scb *prev_scb,
198 struct scb *scb);
199 static int ahd_qinfifo_count(struct ahd_softc *ahd);
200 static int ahd_search_scb_list(struct ahd_softc *ahd, int target,
201 char channel, int lun, u_int tag,
202 role_t role, uint32_t status,
203 ahd_search_action action,
204 u_int *list_head, u_int tid);
205 static void ahd_stitch_tid_list(struct ahd_softc *ahd,
206 u_int tid_prev, u_int tid_cur,
207 u_int tid_next);
208 static void ahd_add_scb_to_free_list(struct ahd_softc *ahd,
209 u_int scbid);
210 static u_int ahd_rem_wscb(struct ahd_softc *ahd, u_int scbid,
211 u_int prev, u_int next, u_int tid);
212 static void ahd_reset_current_bus(struct ahd_softc *ahd);
213 static ahd_callback_t ahd_reset_poll;
214 static ahd_callback_t ahd_stat_timer;
215 #ifdef AHD_DUMP_SEQ
216 static void ahd_dumpseq(struct ahd_softc *ahd);
217 #endif
218 static void ahd_loadseq(struct ahd_softc *ahd);
219 static int ahd_check_patch(struct ahd_softc *ahd,
220 struct patch **start_patch,
221 u_int start_instr, u_int *skip_addr);
222 static u_int ahd_resolve_seqaddr(struct ahd_softc *ahd,
223 u_int address);
224 static void ahd_download_instr(struct ahd_softc *ahd,
225 u_int instrptr, uint8_t *dconsts);
226 static int ahd_probe_stack_size(struct ahd_softc *ahd);
227 static int ahd_scb_active_in_fifo(struct ahd_softc *ahd,
228 struct scb *scb);
229 static void ahd_run_data_fifo(struct ahd_softc *ahd,
230 struct scb *scb);
231
232 #ifdef AHD_TARGET_MODE
233 static void ahd_queue_lstate_event(struct ahd_softc *ahd,
234 struct ahd_tmode_lstate *lstate,
235 u_int initiator_id,
236 u_int event_type,
237 u_int event_arg);
238 static void ahd_update_scsiid(struct ahd_softc *ahd,
239 u_int targid_mask);
240 static int ahd_handle_target_cmd(struct ahd_softc *ahd,
241 struct target_cmd *cmd);
242 #endif
243
244 /******************************** Private Inlines *****************************/
245 static __inline void ahd_assert_atn(struct ahd_softc *ahd);
246 static __inline int ahd_currently_packetized(struct ahd_softc *ahd);
247 static __inline int ahd_set_active_fifo(struct ahd_softc *ahd);
248
249 static __inline void
250 ahd_assert_atn(struct ahd_softc *ahd)
251 {
252 ahd_outb(ahd, SCSISIGO, ATNO);
253 }
254
255 /*
256 * Determine if the current connection has a packetized
257 * agreement. This does not necessarily mean that we
258 * are currently in a packetized transfer. We could
259 * just as easily be sending or receiving a message.
260 */
261 static __inline int
262 ahd_currently_packetized(struct ahd_softc *ahd)
263 {
264 ahd_mode_state saved_modes;
265 int packetized;
266
267 saved_modes = ahd_save_modes(ahd);
268 if ((ahd->bugs & AHD_PKTIZED_STATUS_BUG) != 0) {
269 /*
270 * The packetized bit refers to the last
271 * connection, not the current one. Check
272 * for non-zero LQISTATE instead.
273 */
274 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
275 packetized = ahd_inb(ahd, LQISTATE) != 0;
276 } else {
277 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
278 packetized = ahd_inb(ahd, LQISTAT2) & PACKETIZED;
279 }
280 ahd_restore_modes(ahd, saved_modes);
281 return (packetized);
282 }
283
284 static __inline int
285 ahd_set_active_fifo(struct ahd_softc *ahd)
286 {
287 u_int active_fifo;
288
289 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
290 active_fifo = ahd_inb(ahd, DFFSTAT) & CURRFIFO;
291 switch (active_fifo) {
292 case 0:
293 case 1:
294 ahd_set_modes(ahd, active_fifo, active_fifo);
295 return (1);
296 default:
297 return (0);
298 }
299 }
300
301 /************************* Sequencer Execution Control ************************/
302 /*
303 * Restart the sequencer program from address zero
304 */
305 void
306 ahd_restart(struct ahd_softc *ahd)
307 {
308
309 ahd_pause(ahd);
310
311 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
312
313 /* No more pending messages */
314 ahd_clear_msg_state(ahd);
315 ahd_outb(ahd, SCSISIGO, 0); /* De-assert BSY */
316 ahd_outb(ahd, MSG_OUT, MSG_NOOP); /* No message to send */
317 ahd_outb(ahd, SXFRCTL1, ahd_inb(ahd, SXFRCTL1) & ~BITBUCKET);
318 ahd_outb(ahd, SEQINTCTL, 0);
319 ahd_outb(ahd, LASTPHASE, P_BUSFREE);
320 ahd_outb(ahd, SEQ_FLAGS, 0);
321 ahd_outb(ahd, SAVED_SCSIID, 0xFF);
322 ahd_outb(ahd, SAVED_LUN, 0xFF);
323
324 /*
325 * Ensure that the sequencer's idea of TQINPOS
326 * matches our own. The sequencer increments TQINPOS
327 * only after it sees a DMA complete and a reset could
328 * occur before the increment leaving the kernel to believe
329 * the command arrived but the sequencer to not.
330 */
331 ahd_outb(ahd, TQINPOS, ahd->tqinfifonext);
332
333 /* Always allow reselection */
334 ahd_outb(ahd, SCSISEQ1,
335 ahd_inb(ahd, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP));
336 ahd_set_modes(ahd, AHD_MODE_CCHAN, AHD_MODE_CCHAN);
337 ahd_outb(ahd, SEQCTL0, FASTMODE|SEQRESET);
338 ahd_unpause(ahd);
339 }
340
341 void
342 ahd_clear_fifo(struct ahd_softc *ahd, u_int fifo)
343 {
344 ahd_mode_state saved_modes;
345
346 #ifdef AHD_DEBUG
347 if ((ahd_debug & AHD_SHOW_FIFOS) != 0)
348 printf("%s: Clearing FIFO %d\n", ahd_name(ahd), fifo);
349 #endif
350 saved_modes = ahd_save_modes(ahd);
351 ahd_set_modes(ahd, fifo, fifo);
352 ahd_outb(ahd, DFFSXFRCTL, RSTCHN|CLRSHCNT);
353 if ((ahd_inb(ahd, SG_STATE) & FETCH_INPROG) != 0)
354 ahd_outb(ahd, CCSGCTL, CCSGRESET);
355 ahd_outb(ahd, LONGJMP_ADDR + 1, INVALID_ADDR);
356 ahd_outb(ahd, SG_STATE, 0);
357 ahd_restore_modes(ahd, saved_modes);
358 }
359
360 /************************* Input/Output Queues ********************************/
361 /*
362 * Flush and completed commands that are sitting in the command
363 * complete queues down on the chip but have yet to be dma'ed back up.
364 */
365 void
366 ahd_flush_qoutfifo(struct ahd_softc *ahd)
367 {
368 struct scb *scb;
369 ahd_mode_state saved_modes;
370 u_int saved_scbptr;
371 u_int ccscbctl;
372 u_int scbid;
373 u_int next_scbid;
374
375 saved_modes = ahd_save_modes(ahd);
376
377 /*
378 * Complete any SCBs that just finished being
379 * DMA'ed into the qoutfifo.
380 */
381 ahd_run_qoutfifo(ahd);
382
383 /*
384 * Flush the good status FIFO for compelted packetized commands.
385 */
386 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
387 saved_scbptr = ahd_get_scbptr(ahd);
388 while ((ahd_inb(ahd, LQISTAT2) & LQIGSAVAIL) != 0) {
389 u_int fifo_mode;
390 u_int i;
391
392 scbid = (ahd_inb(ahd, GSFIFO+1) << 8)
393 | ahd_inb(ahd, GSFIFO);
394 scb = ahd_lookup_scb(ahd, scbid);
395 if (scb == NULL) {
396 printf("%s: Warning - GSFIFO SCB %d invalid\n",
397 ahd_name(ahd), scbid);
398 continue;
399 }
400 /*
401 * Determine if this transaction is still active in
402 * any FIFO. If it is, we must flush that FIFO to
403 * the host before completing the command.
404 */
405 fifo_mode = 0;
406 for (i = 0; i < 2; i++) {
407 /* Toggle to the other mode. */
408 fifo_mode ^= 1;
409 ahd_set_modes(ahd, fifo_mode, fifo_mode);
410 if (ahd_scb_active_in_fifo(ahd, scb) == 0)
411 continue;
412
413 ahd_run_data_fifo(ahd, scb);
414
415 /*
416 * Clearing this transaction in this FIFO may
417 * cause a CFG4DATA for this same transaction
418 * to assert in the other FIFO. Make sure we
419 * loop one more time and check the other FIFO.
420 */
421 i = 0;
422 }
423 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
424 ahd_set_scbptr(ahd, scbid);
425 if ((ahd_inb_scbram(ahd, SCB_SGPTR) & SG_LIST_NULL) == 0
426 && ((ahd_inb_scbram(ahd, SCB_SGPTR) & SG_FULL_RESID) != 0
427 || (ahd_inb_scbram(ahd, SCB_RESIDUAL_SGPTR)
428 & SG_LIST_NULL) != 0)) {
429 u_int comp_head;
430
431 /*
432 * The transfer completed with a residual.
433 * Place this SCB on the complete DMA list
434 * so that we Update our in-core copy of the
435 * SCB before completing the command.
436 */
437 ahd_outb(ahd, SCB_SCSI_STATUS, 0);
438 ahd_outb(ahd, SCB_SGPTR,
439 ahd_inb_scbram(ahd, SCB_SGPTR)
440 | SG_STATUS_VALID);
441 ahd_outw(ahd, SCB_TAG, SCB_GET_TAG(scb));
442 comp_head = ahd_inw(ahd, COMPLETE_DMA_SCB_HEAD);
443 ahd_outw(ahd, SCB_NEXT_COMPLETE, comp_head);
444 if (SCBID_IS_NULL(comp_head))
445 ahd_outw(ahd, COMPLETE_DMA_SCB_HEAD,
446 SCB_GET_TAG(scb));
447 } else
448 ahd_complete_scb(ahd, scb);
449 }
450 ahd_set_scbptr(ahd, saved_scbptr);
451
452 /*
453 * Setup for command channel portion of flush.
454 */
455 ahd_set_modes(ahd, AHD_MODE_CCHAN, AHD_MODE_CCHAN);
456
457 /*
458 * Wait for any inprogress DMA to complete and clear DMA state
459 * if this if for an SCB in the qinfifo.
460 */
461 while (((ccscbctl = ahd_inb(ahd, CCSCBCTL)) & (CCARREN|CCSCBEN)) != 0) {
462
463 if ((ccscbctl & (CCSCBDIR|CCARREN)) == (CCSCBDIR|CCARREN)) {
464 if ((ccscbctl & ARRDONE) != 0)
465 break;
466 } else if ((ccscbctl & CCSCBDONE) != 0)
467 break;
468 ahd_delay(200);
469 }
470 if ((ccscbctl & CCSCBDIR) != 0)
471 ahd_outb(ahd, CCSCBCTL, ccscbctl & ~(CCARREN|CCSCBEN));
472
473 saved_scbptr = ahd_get_scbptr(ahd);
474 /*
475 * Manually update/complete any completed SCBs that are waiting to be
476 * DMA'ed back up to the host.
477 */
478 scbid = ahd_inw(ahd, COMPLETE_DMA_SCB_HEAD);
479 while (!SCBID_IS_NULL(scbid)) {
480 uint8_t *hscb_ptr;
481 u_int i;
482
483 ahd_set_scbptr(ahd, scbid);
484 next_scbid = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE);
485 scb = ahd_lookup_scb(ahd, scbid);
486 if (scb == NULL) {
487 printf("%s: Warning - DMA-up and complete "
488 "SCB %d invalid\n", ahd_name(ahd), scbid);
489 continue;
490 }
491 hscb_ptr = (uint8_t *)scb->hscb;
492 for (i = 0; i < sizeof(struct hardware_scb); i++)
493 *hscb_ptr++ = ahd_inb_scbram(ahd, SCB_BASE + i);
494
495 ahd_complete_scb(ahd, scb);
496 scbid = next_scbid;
497 }
498 ahd_outw(ahd, COMPLETE_DMA_SCB_HEAD, SCB_LIST_NULL);
499
500 scbid = ahd_inw(ahd, COMPLETE_SCB_HEAD);
501 while (!SCBID_IS_NULL(scbid)) {
502
503 ahd_set_scbptr(ahd, scbid);
504 next_scbid = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE);
505 scb = ahd_lookup_scb(ahd, scbid);
506 if (scb == NULL) {
507 printf("%s: Warning - Complete SCB %d invalid\n",
508 ahd_name(ahd), scbid);
509 continue;
510 }
511
512 ahd_complete_scb(ahd, scb);
513 scbid = next_scbid;
514 }
515 ahd_outw(ahd, COMPLETE_SCB_HEAD, SCB_LIST_NULL);
516
517 /*
518 * Restore state.
519 */
520 ahd_set_scbptr(ahd, saved_scbptr);
521 ahd_restore_modes(ahd, saved_modes);
522 ahd->flags |= AHD_UPDATE_PEND_CMDS;
523 }
524
525 /*
526 * Determine if an SCB for a packetized transaction
527 * is active in a FIFO.
528 */
529 static int
530 ahd_scb_active_in_fifo(struct ahd_softc *ahd, struct scb *scb)
531 {
532
533 /*
534 * The FIFO is only active for our transaction if
535 * the SCBPTR matches the SCB's ID and the firmware
536 * has installed a handler for the FIFO or we have
537 * a pending SAVEPTRS or CFG4DATA interrupt.
538 */
539 if (ahd_get_scbptr(ahd) != SCB_GET_TAG(scb)
540 || ((ahd_inb(ahd, LONGJMP_ADDR+1) & INVALID_ADDR) != 0
541 && (ahd_inb(ahd, SEQINTSRC) & (CFG4DATA|SAVEPTRS)) == 0))
542 return (0);
543
544 return (1);
545 }
546
547 /*
548 * Run a data fifo to completion for a transaction we know
549 * has completed across the SCSI bus (good status has been
550 * received). We are already set to the correct FIFO mode
551 * on entry to this routine.
552 *
553 * This function attempts to operate exactly as the firmware
554 * would when running this FIFO. Care must be taken to update
555 * this routine any time the firmware's FIFO algorithm is
556 * changed.
557 */
558 static void
559 ahd_run_data_fifo(struct ahd_softc *ahd, struct scb *scb)
560 {
561 u_int seqintsrc;
562
563 while (1) {
564 seqintsrc = ahd_inb(ahd, SEQINTSRC);
565 if ((seqintsrc & CFG4DATA) != 0) {
566 uint32_t datacnt;
567 uint32_t sgptr;
568
569 /*
570 * Clear full residual flag.
571 */
572 sgptr = ahd_inl_scbram(ahd, SCB_SGPTR) & ~SG_FULL_RESID;
573 ahd_outb(ahd, SCB_SGPTR, sgptr);
574
575 /*
576 * Load datacnt and address.
577 */
578 datacnt = ahd_inl_scbram(ahd, SCB_DATACNT);
579 if ((datacnt & AHD_DMA_LAST_SEG) != 0) {
580 sgptr |= LAST_SEG;
581 ahd_outb(ahd, SG_STATE, 0);
582 } else
583 ahd_outb(ahd, SG_STATE, LOADING_NEEDED);
584 ahd_outq(ahd, HADDR, ahd_inq_scbram(ahd, SCB_DATAPTR));
585 ahd_outl(ahd, HCNT, datacnt & AHD_SG_LEN_MASK);
586 ahd_outb(ahd, SG_CACHE_PRE, sgptr);
587 ahd_outb(ahd, DFCNTRL, PRELOADEN|SCSIEN|HDMAEN);
588
589 /*
590 * Initialize Residual Fields.
591 */
592 ahd_outb(ahd, SCB_RESIDUAL_DATACNT+3, datacnt >> 24);
593 ahd_outl(ahd, SCB_RESIDUAL_SGPTR, sgptr & SG_PTR_MASK);
594
595 /*
596 * Mark the SCB as having a FIFO in use.
597 */
598 ahd_outb(ahd, SCB_FIFO_USE_COUNT,
599 ahd_inb_scbram(ahd, SCB_FIFO_USE_COUNT) + 1);
600
601 /*
602 * Install a "fake" handler for this FIFO.
603 */
604 ahd_outw(ahd, LONGJMP_ADDR, 0);
605
606 /*
607 * Notify the hardware that we have satisfied
608 * this sequencer interrupt.
609 */
610 ahd_outb(ahd, CLRSEQINTSRC, CLRCFG4DATA);
611 } else if ((seqintsrc & SAVEPTRS) != 0) {
612 uint32_t sgptr;
613 uint32_t resid;
614
615 if ((ahd_inb(ahd, LONGJMP_ADDR+1)&INVALID_ADDR) != 0) {
616 /*
617 * Snapshot Save Pointers. Clear
618 * the snapshot and continue.
619 */
620 ahd_outb(ahd, DFFSXFRCTL, CLRCHN);
621 continue;
622 }
623
624 /*
625 * Disable S/G fetch so the DMA engine
626 * is available to future users.
627 */
628 if ((ahd_inb(ahd, SG_STATE) & FETCH_INPROG) != 0)
629 ahd_outb(ahd, CCSGCTL, 0);
630 ahd_outb(ahd, SG_STATE, 0);
631
632 /*
633 * Flush the data FIFO. Strickly only
634 * necessary for Rev A parts.
635 */
636 ahd_outb(ahd, DFCNTRL,
637 ahd_inb(ahd, DFCNTRL) | FIFOFLUSH);
638
639 /*
640 * Calculate residual.
641 */
642 sgptr = ahd_inl_scbram(ahd, SCB_RESIDUAL_SGPTR);
643 resid = ahd_inl(ahd, SHCNT);
644 resid |=
645 ahd_inb_scbram(ahd, SCB_RESIDUAL_DATACNT+3) << 24;
646 ahd_outl(ahd, SCB_RESIDUAL_DATACNT, resid);
647 if ((ahd_inb(ahd, SG_CACHE_SHADOW) & LAST_SEG) == 0) {
648 /*
649 * Must back up to the correct S/G element.
650 * Typically this just means resetting our
651 * low byte to the offset in the SG_CACHE,
652 * but if we wrapped, we have to correct
653 * the other bytes of the sgptr too.
654 */
655 if ((ahd_inb(ahd, SG_CACHE_SHADOW) & 0x80) != 0
656 && (sgptr & 0x80) == 0)
657 sgptr -= 0x100;
658 sgptr &= ~0xFF;
659 sgptr |= ahd_inb(ahd, SG_CACHE_SHADOW)
660 & SG_ADDR_MASK;
661 ahd_outl(ahd, SCB_RESIDUAL_SGPTR, sgptr);
662 ahd_outb(ahd, SCB_RESIDUAL_DATACNT + 3, 0);
663 } else if ((resid & AHD_SG_LEN_MASK) == 0) {
664 ahd_outb(ahd, SCB_RESIDUAL_SGPTR,
665 sgptr | SG_LIST_NULL);
666 }
667 /*
668 * Save Pointers.
669 */
670 ahd_outq(ahd, SCB_DATAPTR, ahd_inq(ahd, SHADDR));
671 ahd_outl(ahd, SCB_DATACNT, resid);
672 ahd_outl(ahd, SCB_SGPTR, sgptr);
673 ahd_outb(ahd, CLRSEQINTSRC, CLRSAVEPTRS);
674 ahd_outb(ahd, SEQIMODE,
675 ahd_inb(ahd, SEQIMODE) | ENSAVEPTRS);
676 /*
677 * If the data is to the SCSI bus, we are
678 * done, otherwise wait for FIFOEMP.
679 */
680 if ((ahd_inb(ahd, DFCNTRL) & DIRECTION) != 0)
681 break;
682 } else if ((ahd_inb(ahd, SG_STATE) & LOADING_NEEDED) != 0) {
683 uint32_t sgptr;
684 uint64_t data_addr;
685 uint32_t data_len;
686 u_int dfcntrl;
687
688 /*
689 * Disable S/G fetch so the DMA engine
690 * is available to future users.
691 */
692 if ((ahd_inb(ahd, SG_STATE) & FETCH_INPROG) != 0) {
693 ahd_outb(ahd, CCSGCTL, 0);
694 ahd_outb(ahd, SG_STATE, LOADING_NEEDED);
695 }
696
697 /*
698 * Wait for the DMA engine to notice that the
699 * host transfer is enabled and that there is
700 * space in the S/G FIFO for new segments before
701 * loading more segments.
702 */
703 if ((ahd_inb(ahd, DFSTATUS) & PRELOAD_AVAIL) == 0)
704 continue;
705 if ((ahd_inb(ahd, DFCNTRL) & HDMAENACK) == 0)
706 continue;
707
708 /*
709 * Determine the offset of the next S/G
710 * element to load.
711 */
712 sgptr = ahd_inl_scbram(ahd, SCB_RESIDUAL_SGPTR);
713 sgptr &= SG_PTR_MASK;
714 if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) {
715 struct ahd_dma64_seg *sg;
716
717 sg = ahd_sg_bus_to_virt(ahd, scb, sgptr);
718 data_addr = sg->addr;
719 data_len = sg->len;
720 sgptr += sizeof(*sg);
721 } else {
722 struct ahd_dma_seg *sg;
723
724 sg = ahd_sg_bus_to_virt(ahd, scb, sgptr);
725 data_addr = sg->len & AHD_SG_HIGH_ADDR_MASK;
726 data_addr <<= 8;
727 data_addr |= sg->addr;
728 data_len = sg->len;
729 sgptr += sizeof(*sg);
730 }
731
732 /*
733 * Update residual information.
734 */
735 ahd_outb(ahd, SCB_RESIDUAL_DATACNT+3, data_len >> 24);
736 ahd_outl(ahd, SCB_RESIDUAL_SGPTR, sgptr);
737
738 /*
739 * Load the S/G.
740 */
741 if (data_len & AHD_DMA_LAST_SEG) {
742 sgptr |= LAST_SEG;
743 ahd_outb(ahd, SG_STATE, 0);
744 }
745 ahd_outq(ahd, HADDR, data_addr);
746 ahd_outl(ahd, HCNT, data_len & AHD_SG_LEN_MASK);
747 ahd_outb(ahd, SG_CACHE_PRE, sgptr & 0xFF);
748
749 /*
750 * Advertise the segment to the hardware.
751 */
752 dfcntrl = ahd_inb(ahd, DFCNTRL)|PRELOADEN|HDMAEN;
753 if ((ahd->features & AHD_NEW_DFCNTRL_OPTS)!=0) {
754 /*
755 * Use SCSIENWRDIS so that SCSIEN
756 * is never modified by this
757 * operation.
758 */
759 dfcntrl |= SCSIENWRDIS;
760 }
761 ahd_outb(ahd, DFCNTRL, dfcntrl);
762 } else if ((ahd_inb(ahd, SG_CACHE_SHADOW)
763 & LAST_SEG_DONE) != 0) {
764
765 /*
766 * Transfer completed to the end of SG list
767 * and has flushed to the host.
768 */
769 ahd_outb(ahd, SCB_SGPTR,
770 ahd_inb_scbram(ahd, SCB_SGPTR) | SG_LIST_NULL);
771 break;
772 } else if ((ahd_inb(ahd, DFSTATUS) & FIFOEMP) != 0) {
773 break;
774 }
775 ahd_delay(200);
776 }
777 /*
778 * Clear any handler for this FIFO, decrement
779 * the FIFO use count for the SCB, and release
780 * the FIFO.
781 */
782 ahd_outb(ahd, LONGJMP_ADDR + 1, INVALID_ADDR);
783 ahd_outb(ahd, SCB_FIFO_USE_COUNT,
784 ahd_inb_scbram(ahd, SCB_FIFO_USE_COUNT) - 1);
785 ahd_outb(ahd, DFFSXFRCTL, CLRCHN);
786 }
787
788 void
789 ahd_run_qoutfifo(struct ahd_softc *ahd)
790 {
791 struct scb *scb;
792 u_int scb_index;
793
794 if ((ahd->flags & AHD_RUNNING_QOUTFIFO) != 0)
795 panic("ahd_run_qoutfifo recursion");
796 ahd->flags |= AHD_RUNNING_QOUTFIFO;
797 ahd_sync_qoutfifo(ahd, BUS_DMASYNC_POSTREAD);
798 while ((ahd->qoutfifo[ahd->qoutfifonext]
799 & QOUTFIFO_ENTRY_VALID_LE) == ahd->qoutfifonext_valid_tag) {
800
801 scb_index = ahd_le16toh(ahd->qoutfifo[ahd->qoutfifonext]
802 & ~QOUTFIFO_ENTRY_VALID_LE);
803 scb = ahd_lookup_scb(ahd, scb_index);
804 if (scb == NULL) {
805 printf("%s: WARNING no command for scb %d "
806 "(cmdcmplt)\nQOUTPOS = %d\n",
807 ahd_name(ahd), scb_index,
808 ahd->qoutfifonext);
809 ahd_dump_card_state(ahd);
810 } else
811 ahd_complete_scb(ahd, scb);
812
813 ahd->qoutfifonext = (ahd->qoutfifonext+1) & (AHD_QOUT_SIZE-1);
814 if (ahd->qoutfifonext == 0)
815 ahd->qoutfifonext_valid_tag ^= QOUTFIFO_ENTRY_VALID_LE;
816 }
817 ahd->flags &= ~AHD_RUNNING_QOUTFIFO;
818 }
819
820 /************************* Interrupt Handling *********************************/
821 void
822 ahd_handle_hwerrint(struct ahd_softc *ahd)
823 {
824 /*
825 * Some catastrophic hardware error has occurred.
826 * Print it for the user and disable the controller.
827 */
828 int i;
829 int error;
830
831 error = ahd_inb(ahd, ERROR);
832 for (i = 0; i < num_errors; i++) {
833 if ((error & ahd_hard_errors[i].errno) != 0)
834 printf("%s: hwerrint, %s\n",
835 ahd_name(ahd), ahd_hard_errors[i].errmesg);
836 }
837
838 ahd_dump_card_state(ahd);
839 panic("BRKADRINT");
840
841 /* Tell everyone that this HBA is no longer available */
842 ahd_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
843 CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN,
844 CAM_NO_HBA);
845
846 /* Tell the system that this controller has gone away. */
847 ahd_free(ahd);
848 }
849
850 void
851 ahd_handle_seqint(struct ahd_softc *ahd, u_int intstat)
852 {
853 u_int seqintcode;
854
855 /*
856 * Save the sequencer interrupt code and clear the SEQINT
857 * bit. We will unpause the sequencer, if appropriate,
858 * after servicing the request.
859 */
860 seqintcode = ahd_inb(ahd, SEQINTCODE);
861 ahd_outb(ahd, CLRINT, CLRSEQINT);
862 if ((ahd->bugs & AHD_INTCOLLISION_BUG) != 0) {
863 /*
864 * Unpause the sequencer and let it clear
865 * SEQINT by writing NO_SEQINT to it. This
866 * will cause the sequencer to be paused again,
867 * which is the expected state of this routine.
868 */
869 ahd_unpause(ahd);
870 while (!ahd_is_paused(ahd))
871 ;
872 ahd_outb(ahd, CLRINT, CLRSEQINT);
873 }
874 ahd_update_modes(ahd);
875 #ifdef AHD_DEBUG
876 if ((ahd_debug & AHD_SHOW_MISC) != 0)
877 printf("%s: Handle Seqint Called for code %d\n",
878 ahd_name(ahd), seqintcode);
879 #endif
880 switch (seqintcode) {
881 case BAD_SCB_STATUS:
882 {
883 struct scb *scb;
884 u_int scbid;
885 int cmds_pending;
886
887 scbid = ahd_get_scbptr(ahd);
888 scb = ahd_lookup_scb(ahd, scbid);
889 if (scb != NULL) {
890 ahd_complete_scb(ahd, scb);
891 } else {
892 printf("%s: WARNING no command for scb %d "
893 "(bad status)\n", ahd_name(ahd), scbid);
894 ahd_dump_card_state(ahd);
895 }
896 cmds_pending = ahd_inw(ahd, CMDS_PENDING);
897 if (cmds_pending > 0)
898 ahd_outw(ahd, CMDS_PENDING, cmds_pending - 1);
899 break;
900 }
901 case ENTERING_NONPACK:
902 {
903 struct scb *scb;
904 u_int scbid;
905
906 AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK),
907 ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK));
908 scbid = ahd_get_scbptr(ahd);
909 scb = ahd_lookup_scb(ahd, scbid);
910 if (scb == NULL) {
911 /*
912 * Somehow need to know if this
913 * is from a selection or reselection.
914 * From that, we can determine target
915 * ID so we at least have an I_T nexus.
916 */
917 } else {
918 ahd_outb(ahd, SAVED_SCSIID, scb->hscb->scsiid);
919 ahd_outb(ahd, SAVED_LUN, scb->hscb->lun);
920 ahd_outb(ahd, SEQ_FLAGS, 0x0);
921 }
922 if ((ahd_inb(ahd, LQISTAT2) & LQIPHASE_OUTPKT) != 0
923 && (ahd_inb(ahd, SCSISIGO) & ATNO) != 0) {
924 /*
925 * Phase change after read stream with
926 * CRC error with P0 asserted on last
927 * packet.
928 */
929 #ifdef AHD_DEBUG
930 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
931 printf("%s: Assuming LQIPHASE_NLQ with "
932 "P0 assertion\n", ahd_name(ahd));
933 #endif
934 }
935 #ifdef AHD_DEBUG
936 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
937 printf("%s: Entering NONPACK\n", ahd_name(ahd));
938 #endif
939 break;
940 }
941 case INVALID_SEQINT:
942 printf("%s: Invalid Sequencer interrupt occurred.\n",
943 ahd_name(ahd));
944 ahd_dump_card_state(ahd);
945 ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
946 break;
947 case STATUS_OVERRUN:
948 {
949 struct scb *scb;
950 u_int scbid;
951
952 scbid = ahd_get_scbptr(ahd);
953 scb = ahd_lookup_scb(ahd, scbid);
954 if (scb != NULL)
955 ahd_print_path(ahd, scb);
956 else
957 printf("%s: ", ahd_name(ahd));
958 printf("SCB %d Packetized Status Overrun", scbid);
959 ahd_dump_card_state(ahd);
960 ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
961 break;
962 }
963 case CFG4ISTAT_INTR:
964 {
965 struct scb *scb;
966 u_int scbid;
967
968 scbid = ahd_get_scbptr(ahd);
969 scb = ahd_lookup_scb(ahd, scbid);
970 if (scb == NULL) {
971 ahd_dump_card_state(ahd);
972 printf("CFG4ISTAT: Free SCB %d referenced", scbid);
973 panic("For safety");
974 }
975 ahd_outq(ahd, HADDR, scb->sense_busaddr);
976 ahd_outw(ahd, HCNT, AHD_SENSE_BUFSIZE);
977 ahd_outb(ahd, HCNT + 2, 0);
978 ahd_outb(ahd, SG_CACHE_PRE, SG_LAST_SEG);
979 ahd_outb(ahd, DFCNTRL, PRELOADEN|SCSIEN|HDMAEN);
980 break;
981 }
982 case ILLEGAL_PHASE:
983 {
984 u_int bus_phase;
985
986 bus_phase = ahd_inb(ahd, SCSISIGI) & PHASE_MASK;
987 printf("%s: ILLEGAL_PHASE 0x%x\n",
988 ahd_name(ahd), bus_phase);
989
990 switch (bus_phase) {
991 case P_DATAOUT:
992 case P_DATAIN:
993 case P_DATAOUT_DT:
994 case P_DATAIN_DT:
995 case P_MESGOUT:
996 case P_STATUS:
997 case P_MESGIN:
998 ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
999 printf("%s: Issued Bus Reset.\n", ahd_name(ahd));
1000 break;
1001 case P_COMMAND:
1002 {
1003 struct ahd_devinfo devinfo;
1004 struct scb *scb;
1005 struct ahd_initiator_tinfo *targ_info;
1006 struct ahd_tmode_tstate *tstate;
1007 struct ahd_transinfo *tinfo;
1008 u_int scbid;
1009
1010 /*
1011 * If a target takes us into the command phase
1012 * assume that it has been externally reset and
1013 * has thus lost our previous packetized negotiation
1014 * agreement. Since we have not sent an identify
1015 * message and may not have fully qualified the
1016 * connection, we change our command to TUR, assert
1017 * ATN and ABORT the task when we go to message in
1018 * phase. The OSM will see the REQUEUE_REQUEST
1019 * status and retry the command.
1020 */
1021 scbid = ahd_get_scbptr(ahd);
1022 scb = ahd_lookup_scb(ahd, scbid);
1023 if (scb == NULL) {
1024 printf("Invalid phase with no valid SCB. "
1025 "Resetting bus.\n");
1026 ahd_reset_channel(ahd, 'A',
1027 /*Initiate Reset*/TRUE);
1028 break;
1029 }
1030 ahd_compile_devinfo(&devinfo, SCB_GET_OUR_ID(scb),
1031 SCB_GET_TARGET(ahd, scb),
1032 SCB_GET_LUN(scb),
1033 SCB_GET_CHANNEL(ahd, scb),
1034 ROLE_INITIATOR);
1035 targ_info = ahd_fetch_transinfo(ahd,
1036 devinfo.channel,
1037 devinfo.our_scsiid,
1038 devinfo.target,
1039 &tstate);
1040 tinfo = &targ_info->curr;
1041 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
1042 AHD_TRANS_ACTIVE, /*paused*/TRUE);
1043 ahd_set_syncrate(ahd, &devinfo, /*period*/0,
1044 /*offset*/0, /*ppr_options*/0,
1045 AHD_TRANS_ACTIVE, /*paused*/TRUE);
1046 ahd_outb(ahd, SCB_CDB_STORE, 0);
1047 ahd_outb(ahd, SCB_CDB_STORE+1, 0);
1048 ahd_outb(ahd, SCB_CDB_STORE+2, 0);
1049 ahd_outb(ahd, SCB_CDB_STORE+3, 0);
1050 ahd_outb(ahd, SCB_CDB_STORE+4, 0);
1051 ahd_outb(ahd, SCB_CDB_STORE+5, 0);
1052 ahd_outb(ahd, SCB_CDB_LEN, 6);
1053 scb->hscb->control &= ~(TAG_ENB|SCB_TAG_TYPE);
1054 scb->hscb->control |= MK_MESSAGE;
1055 ahd_outb(ahd, SCB_CONTROL, scb->hscb->control);
1056 ahd_outb(ahd, MSG_OUT, HOST_MSG);
1057 ahd_outb(ahd, SAVED_SCSIID, scb->hscb->scsiid);
1058 /*
1059 * The lun is 0, regardless of the SCB's lun
1060 * as we have not sent an identify message.
1061 */
1062 ahd_outb(ahd, SAVED_LUN, 0);
1063 ahd_outb(ahd, SEQ_FLAGS, 0);
1064 ahd_assert_atn(ahd);
1065 scb->flags &= ~(SCB_PACKETIZED);
1066 scb->flags |= SCB_ABORT|SCB_CMDPHASE_ABORT;
1067 ahd_freeze_devq(ahd, scb);
1068 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1069 ahd_freeze_scb(scb);
1070
1071 /*
1072 * Allow the sequencer to continue with
1073 * non-pack processing.
1074 */
1075 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
1076 ahd_outb(ahd, CLRLQOINT1, CLRLQOPHACHGINPKT);
1077 if ((ahd->bugs & AHD_CLRLQO_AUTOCLR_BUG) != 0) {
1078 ahd_outb(ahd, CLRLQOINT1, 0);
1079 }
1080 #ifdef AHD_DEBUG
1081 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) {
1082 ahd_print_path(ahd, scb);
1083 printf("Unexpected command phase from "
1084 "packetized target\n");
1085 }
1086 #endif
1087 break;
1088 }
1089 }
1090 break;
1091 }
1092 case CFG4OVERRUN:
1093 {
1094 struct scb *scb;
1095 u_int scb_index;
1096
1097 #ifdef AHD_DEBUG
1098 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) {
1099 printf("%s: CFG4OVERRUN mode = %x\n", ahd_name(ahd),
1100 ahd_inb(ahd, MODE_PTR));
1101 }
1102 #endif
1103 scb_index = ahd_get_scbptr(ahd);
1104 scb = ahd_lookup_scb(ahd, scb_index);
1105 if (scb == NULL) {
1106 /*
1107 * Attempt to transfer to an SCB that is
1108 * not outstanding.
1109 */
1110 ahd_assert_atn(ahd);
1111 ahd_outb(ahd, MSG_OUT, HOST_MSG);
1112 ahd->msgout_buf[0] = MSG_ABORT_TASK;
1113 ahd->msgout_len = 1;
1114 ahd->msgout_index = 0;
1115 ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
1116 /*
1117 * Clear status received flag to prevent any
1118 * attempt to complete this bogus SCB.
1119 */
1120 ahd_outb(ahd, SCB_CONTROL,
1121 ahd_inb_scbram(ahd, SCB_CONTROL)
1122 & ~STATUS_RCVD);
1123 }
1124 break;
1125 }
1126 case DUMP_CARD_STATE:
1127 {
1128 ahd_dump_card_state(ahd);
1129 break;
1130 }
1131 case PDATA_REINIT:
1132 {
1133 #ifdef AHD_DEBUG
1134 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) {
1135 printf("%s: PDATA_REINIT - DFCNTRL = 0x%x "
1136 "SG_CACHE_SHADOW = 0x%x\n",
1137 ahd_name(ahd), ahd_inb(ahd, DFCNTRL),
1138 ahd_inb(ahd, SG_CACHE_SHADOW));
1139 }
1140 #endif
1141 ahd_reinitialize_dataptrs(ahd);
1142 break;
1143 }
1144 case HOST_MSG_LOOP:
1145 {
1146 struct ahd_devinfo devinfo;
1147
1148 /*
1149 * The sequencer has encountered a message phase
1150 * that requires host assistance for completion.
1151 * While handling the message phase(s), we will be
1152 * notified by the sequencer after each byte is
1153 * transfered so we can track bus phase changes.
1154 *
1155 * If this is the first time we've seen a HOST_MSG_LOOP
1156 * interrupt, initialize the state of the host message
1157 * loop.
1158 */
1159 ahd_fetch_devinfo(ahd, &devinfo);
1160 if (ahd->msg_type == MSG_TYPE_NONE) {
1161 struct scb *scb;
1162 u_int scb_index;
1163 u_int bus_phase;
1164
1165 bus_phase = ahd_inb(ahd, SCSISIGI) & PHASE_MASK;
1166 if (bus_phase != P_MESGIN
1167 && bus_phase != P_MESGOUT) {
1168 printf("ahd_intr: HOST_MSG_LOOP bad "
1169 "phase 0x%x\n", bus_phase);
1170 /*
1171 * Probably transitioned to bus free before
1172 * we got here. Just punt the message.
1173 */
1174 ahd_dump_card_state(ahd);
1175 ahd_clear_intstat(ahd);
1176 ahd_restart(ahd);
1177 return;
1178 }
1179
1180 scb_index = ahd_get_scbptr(ahd);
1181 scb = ahd_lookup_scb(ahd, scb_index);
1182 if (devinfo.role == ROLE_INITIATOR) {
1183 if (bus_phase == P_MESGOUT)
1184 ahd_setup_initiator_msgout(ahd,
1185 &devinfo,
1186 scb);
1187 else {
1188 ahd->msg_type =
1189 MSG_TYPE_INITIATOR_MSGIN;
1190 ahd->msgin_index = 0;
1191 }
1192 }
1193 #ifdef AHD_TARGET_MODE
1194 else {
1195 if (bus_phase == P_MESGOUT) {
1196 ahd->msg_type =
1197 MSG_TYPE_TARGET_MSGOUT;
1198 ahd->msgin_index = 0;
1199 }
1200 else
1201 ahd_setup_target_msgin(ahd,
1202 &devinfo,
1203 scb);
1204 }
1205 #endif
1206 }
1207
1208 ahd_handle_message_phase(ahd);
1209 break;
1210 }
1211 case NO_MATCH:
1212 {
1213 /* Ensure we don't leave the selection hardware on */
1214 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
1215 ahd_outb(ahd, SCSISEQ0, ahd_inb(ahd, SCSISEQ0) & ~ENSELO);
1216
1217 printf("%s:%c:%d: no active SCB for reconnecting "
1218 "target - issuing BUS DEVICE RESET\n",
1219 ahd_name(ahd), 'A', ahd_inb(ahd, SELID) >> 4);
1220 printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
1221 "REG0 == 0x%x ACCUM = 0x%x\n",
1222 ahd_inb(ahd, SAVED_SCSIID), ahd_inb(ahd, SAVED_LUN),
1223 ahd_inw(ahd, REG0), ahd_inb(ahd, ACCUM));
1224 printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
1225 "SINDEX == 0x%x\n",
1226 ahd_inb(ahd, SEQ_FLAGS), ahd_get_scbptr(ahd),
1227 ahd_find_busy_tcl(ahd,
1228 BUILD_TCL(ahd_inb(ahd, SAVED_SCSIID),
1229 ahd_inb(ahd, SAVED_LUN))),
1230 ahd_inw(ahd, SINDEX));
1231 printf("SELID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
1232 "SCB_CONTROL == 0x%x\n",
1233 ahd_inb(ahd, SELID), ahd_inb_scbram(ahd, SCB_SCSIID),
1234 ahd_inb_scbram(ahd, SCB_LUN),
1235 ahd_inb_scbram(ahd, SCB_CONTROL));
1236 printf("SCSIBUS[0] == 0x%x, SCSISIGI == 0x%x\n",
1237 ahd_inb(ahd, SCSIBUS), ahd_inb(ahd, SCSISIGI));
1238 printf("SXFRCTL0 == 0x%x\n", ahd_inb(ahd, SXFRCTL0));
1239 printf("SEQCTL0 == 0x%x\n", ahd_inb(ahd, SEQCTL0));
1240 ahd_dump_card_state(ahd);
1241 ahd->msgout_buf[0] = MSG_BUS_DEV_RESET;
1242 ahd->msgout_len = 1;
1243 ahd->msgout_index = 0;
1244 ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
1245 ahd_outb(ahd, MSG_OUT, HOST_MSG);
1246 ahd_assert_atn(ahd);
1247 break;
1248 }
1249 case PROTO_VIOLATION:
1250 {
1251 ahd_handle_proto_violation(ahd);
1252 break;
1253 }
1254 case IGN_WIDE_RES:
1255 {
1256 struct ahd_devinfo devinfo;
1257
1258 ahd_fetch_devinfo(ahd, &devinfo);
1259 ahd_handle_ign_wide_residue(ahd, &devinfo);
1260 break;
1261 }
1262 case BAD_PHASE:
1263 {
1264 u_int lastphase;
1265
1266 lastphase = ahd_inb(ahd, LASTPHASE);
1267 printf("%s:%c:%d: unknown scsi bus phase %x, "
1268 "lastphase = 0x%x. Attempting to continue\n",
1269 ahd_name(ahd), 'A',
1270 SCSIID_TARGET(ahd, ahd_inb(ahd, SAVED_SCSIID)),
1271 lastphase, ahd_inb(ahd, SCSISIGI));
1272 break;
1273 }
1274 case MISSED_BUSFREE:
1275 {
1276 u_int lastphase;
1277
1278 lastphase = ahd_inb(ahd, LASTPHASE);
1279 printf("%s:%c:%d: Missed busfree. "
1280 "Lastphase = 0x%x, Curphase = 0x%x\n",
1281 ahd_name(ahd), 'A',
1282 SCSIID_TARGET(ahd, ahd_inb(ahd, SAVED_SCSIID)),
1283 lastphase, ahd_inb(ahd, SCSISIGI));
1284 ahd_restart(ahd);
1285 return;
1286 }
1287 case DATA_OVERRUN:
1288 {
1289 /*
1290 * When the sequencer detects an overrun, it
1291 * places the controller in "BITBUCKET" mode
1292 * and allows the target to complete its transfer.
1293 * Unfortunately, none of the counters get updated
1294 * when the controller is in this mode, so we have
1295 * no way of knowing how large the overrun was.
1296 */
1297 struct scb *scb;
1298 u_int scbindex;
1299 #ifdef AHD_DEBUG
1300 u_int lastphase;
1301 #endif
1302
1303 scbindex = ahd_get_scbptr(ahd);
1304 scb = ahd_lookup_scb(ahd, scbindex);
1305 #ifdef AHD_DEBUG
1306 lastphase = ahd_inb(ahd, LASTPHASE);
1307 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) {
1308 ahd_print_path(ahd, scb);
1309 printf("data overrun detected %s. Tag == 0x%x.\n",
1310 ahd_lookup_phase_entry(lastphase)->phasemsg,
1311 SCB_GET_TAG(scb));
1312 ahd_print_path(ahd, scb);
1313 printf("%s seen Data Phase. Length = %ld. "
1314 "NumSGs = %d.\n",
1315 ahd_inb(ahd, SEQ_FLAGS) & DPHASE
1316 ? "Have" : "Haven't",
1317 ahd_get_transfer_length(scb), scb->sg_count);
1318 ahd_dump_sglist(scb);
1319 }
1320 #endif
1321
1322 /*
1323 * Set this and it will take effect when the
1324 * target does a command complete.
1325 */
1326 ahd_freeze_devq(ahd, scb);
1327 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1328 ahd_freeze_scb(scb);
1329 break;
1330 }
1331 case MKMSG_FAILED:
1332 {
1333 struct ahd_devinfo devinfo;
1334 struct scb *scb;
1335 u_int scbid;
1336
1337 ahd_fetch_devinfo(ahd, &devinfo);
1338 printf("%s:%c:%d:%d: Attempt to issue message failed\n",
1339 ahd_name(ahd), devinfo.channel, devinfo.target,
1340 devinfo.lun);
1341 scbid = ahd_get_scbptr(ahd);
1342 scb = ahd_lookup_scb(ahd, scbid);
1343 if (scb != NULL
1344 && (scb->flags & SCB_RECOVERY_SCB) != 0)
1345 /*
1346 * Ensure that we didn't put a second instance of this
1347 * SCB into the QINFIFO.
1348 */
1349 ahd_search_qinfifo(ahd, SCB_GET_TARGET(ahd, scb),
1350 SCB_GET_CHANNEL(ahd, scb),
1351 SCB_GET_LUN(scb), SCB_GET_TAG(scb),
1352 ROLE_INITIATOR, /*status*/0,
1353 SEARCH_REMOVE);
1354 ahd_outb(ahd, SCB_CONTROL,
1355 ahd_inb_scbram(ahd, SCB_CONTROL) & ~MK_MESSAGE);
1356 break;
1357 }
1358 case TASKMGMT_FUNC_COMPLETE:
1359 {
1360 u_int scbid;
1361 struct scb *scb;
1362
1363 scbid = ahd_get_scbptr(ahd);
1364 scb = ahd_lookup_scb(ahd, scbid);
1365 if (scb != NULL) {
1366 u_int lun;
1367 u_int tag;
1368 cam_status error;
1369
1370 ahd_print_path(ahd, scb);
1371 printf("Task Management Func 0x%x Complete\n",
1372 scb->hscb->task_management);
1373 lun = CAM_LUN_WILDCARD;
1374 tag = SCB_LIST_NULL;
1375
1376 switch (scb->hscb->task_management) {
1377 case SIU_TASKMGMT_ABORT_TASK:
1378 tag = SCB_GET_TAG(scb);
1379 case SIU_TASKMGMT_ABORT_TASK_SET:
1380 case SIU_TASKMGMT_CLEAR_TASK_SET:
1381 lun = scb->hscb->lun;
1382 error = CAM_REQ_ABORTED;
1383 ahd_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1384 'A', lun, tag, ROLE_INITIATOR,
1385 error);
1386 break;
1387 case SIU_TASKMGMT_LUN_RESET:
1388 lun = scb->hscb->lun;
1389 case SIU_TASKMGMT_TARGET_RESET:
1390 {
1391 struct ahd_devinfo devinfo;
1392
1393 ahd_scb_devinfo(ahd, &devinfo, scb);
1394 error = CAM_BDR_SENT;
1395 ahd_handle_devreset(ahd, &devinfo, lun,
1396 CAM_BDR_SENT,
1397 lun != CAM_LUN_WILDCARD
1398 ? "Lun Reset"
1399 : "Target Reset",
1400 /*verbose_level*/0);
1401 break;
1402 }
1403 default:
1404 panic("Unexpected TaskMgmt Func\n");
1405 break;
1406 }
1407 }
1408 break;
1409 }
1410 case TASKMGMT_CMD_CMPLT_OKAY:
1411 {
1412 u_int scbid;
1413 struct scb *scb;
1414
1415 /*
1416 * An ABORT TASK TMF failed to be delivered before
1417 * the targeted command completed normally.
1418 */
1419 scbid = ahd_get_scbptr(ahd);
1420 scb = ahd_lookup_scb(ahd, scbid);
1421 if (scb != NULL) {
1422 /*
1423 * Remove the second instance of this SCB from
1424 * the QINFIFO if it is still there.
1425 */
1426 ahd_print_path(ahd, scb);
1427 printf("SCB completes before TMF\n");
1428 /*
1429 * Handle losing the race. Wait until any
1430 * current selection completes. We will then
1431 * set the TMF back to zero in this SCB so that
1432 * the sequencer doesn't bother to issue another
1433 * sequencer interrupt for its completion.
1434 */
1435 while ((ahd_inb(ahd, SCSISEQ0) & ENSELO) != 0
1436 && (ahd_inb(ahd, SSTAT0) & SELDO) == 0
1437 && (ahd_inb(ahd, SSTAT1) & SELTO) == 0)
1438 ;
1439 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 0);
1440 ahd_search_qinfifo(ahd, SCB_GET_TARGET(ahd, scb),
1441 SCB_GET_CHANNEL(ahd, scb),
1442 SCB_GET_LUN(scb), SCB_GET_TAG(scb),
1443 ROLE_INITIATOR, /*status*/0,
1444 SEARCH_REMOVE);
1445 }
1446 break;
1447 }
1448 case TRACEPOINT0:
1449 case TRACEPOINT1:
1450 case TRACEPOINT2:
1451 case TRACEPOINT3:
1452 printf("%s: Tracepoint %d\n", ahd_name(ahd),
1453 seqintcode - TRACEPOINT0);
1454 break;
1455 case NO_SEQINT:
1456 break;
1457 case SAW_HWERR:
1458 ahd_handle_hwerrint(ahd);
1459 break;
1460 default:
1461 printf("%s: Unexpected SEQINTCODE %d\n", ahd_name(ahd),
1462 seqintcode);
1463 break;
1464 }
1465 /*
1466 * The sequencer is paused immediately on
1467 * a SEQINT, so we should restart it when
1468 * we're done.
1469 */
1470 ahd_unpause(ahd);
1471 }
1472
1473 void
1474 ahd_handle_scsiint(struct ahd_softc *ahd, u_int intstat)
1475 {
1476 struct scb *scb;
1477 u_int status0;
1478 u_int status3;
1479 u_int status;
1480 u_int lqistat1;
1481 u_int lqostat0;
1482 u_int scbid;
1483 u_int busfreetime;
1484
1485 ahd_update_modes(ahd);
1486 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
1487
1488 status3 = ahd_inb(ahd, SSTAT3) & (NTRAMPERR|OSRAMPERR);
1489 status0 = ahd_inb(ahd, SSTAT0) & (IOERR|OVERRUN|SELDI|SELDO);
1490 status = ahd_inb(ahd, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
1491 lqistat1 = ahd_inb(ahd, LQISTAT1);
1492 lqostat0 = ahd_inb(ahd, LQOSTAT0);
1493 busfreetime = ahd_inb(ahd, SSTAT2) & BUSFREETIME;
1494 if ((status0 & (SELDI|SELDO)) != 0) {
1495 u_int simode0;
1496
1497 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
1498 simode0 = ahd_inb(ahd, SIMODE0);
1499 status0 &= simode0 & (IOERR|OVERRUN|SELDI|SELDO);
1500 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
1501 }
1502 scbid = ahd_get_scbptr(ahd);
1503 scb = ahd_lookup_scb(ahd, scbid);
1504 if (scb != NULL
1505 && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) != 0)
1506 scb = NULL;
1507
1508 /* Make sure the sequencer is in a safe location. */
1509 ahd_clear_critical_section(ahd);
1510
1511 if ((status0 & IOERR) != 0) {
1512 u_int now_lvd;
1513
1514 now_lvd = ahd_inb(ahd, SBLKCTL) & ENAB40;
1515 printf("%s: Transceiver State Has Changed to %s mode\n",
1516 ahd_name(ahd), now_lvd ? "LVD" : "SE");
1517 ahd_outb(ahd, CLRSINT0, CLRIOERR);
1518 /*
1519 * A change in I/O mode is equivalent to a bus reset.
1520 */
1521 ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
1522 ahd_pause(ahd);
1523 ahd_setup_iocell_workaround(ahd);
1524 ahd_unpause(ahd);
1525 } else if ((status0 & OVERRUN) != 0) {
1526 printf("%s: SCSI offset overrun detected. Resetting bus.\n",
1527 ahd_name(ahd));
1528 ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
1529 } else if ((status & SCSIRSTI) != 0) {
1530 printf("%s: Someone reset channel A\n", ahd_name(ahd));
1531 ahd_reset_channel(ahd, 'A', /*Initiate Reset*/FALSE);
1532 } else if ((status & SCSIPERR) != 0) {
1533 ahd_handle_transmission_error(ahd);
1534 } else if (lqostat0 != 0) {
1535 printf("%s: lqostat0 == 0x%x!\n", ahd_name(ahd), lqostat0);
1536 ahd_outb(ahd, CLRLQOINT0, lqostat0);
1537 if ((ahd->bugs & AHD_CLRLQO_AUTOCLR_BUG) != 0) {
1538 ahd_outb(ahd, CLRLQOINT1, 0);
1539 }
1540 } else if ((status & SELTO) != 0) {
1541 u_int scbid;
1542
1543 /* Stop the selection */
1544 ahd_outb(ahd, SCSISEQ0, 0);
1545
1546 /* No more pending messages */
1547 ahd_clear_msg_state(ahd);
1548
1549 /* Clear interrupt state */
1550 ahd_outb(ahd, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR);
1551
1552 /*
1553 * Although the driver does not care about the
1554 * 'Selection in Progress' status bit, the busy
1555 * LED does. SELINGO is only cleared by a sucessfull
1556 * selection, so we must manually clear it to insure
1557 * the LED turns off just incase no future successful
1558 * selections occur (e.g. no devices on the bus).
1559 */
1560 ahd_outb(ahd, CLRSINT0, CLRSELINGO);
1561
1562 scbid = ahd_inw(ahd, WAITING_TID_HEAD);
1563 scb = ahd_lookup_scb(ahd, scbid);
1564 if (scb == NULL) {
1565 printf("%s: ahd_intr - referenced scb not "
1566 "valid during SELTO scb(0x%x)\n",
1567 ahd_name(ahd), scbid);
1568 ahd_dump_card_state(ahd);
1569 } else {
1570 struct ahd_devinfo devinfo;
1571 #ifdef AHD_DEBUG
1572 if ((ahd_debug & AHD_SHOW_SELTO) != 0) {
1573 ahd_print_path(ahd, scb);
1574 printf("Saw Selection Timeout for SCB 0x%x\n",
1575 scbid);
1576 }
1577 #endif
1578 /*
1579 * Force a renegotiation with this target just in
1580 * case the cable was pulled and will later be
1581 * re-attached. The target may forget its negotiation
1582 * settings with us should it attempt to reselect
1583 * during the interruption. The target will not issue
1584 * a unit attention in this case, so we must always
1585 * renegotiate.
1586 */
1587 ahd_scb_devinfo(ahd, &devinfo, scb);
1588 ahd_force_renegotiation(ahd, &devinfo);
1589 ahd_set_transaction_status(scb, CAM_SEL_TIMEOUT);
1590 ahd_freeze_devq(ahd, scb);
1591 }
1592 ahd_outb(ahd, CLRINT, CLRSCSIINT);
1593 ahd_iocell_first_selection(ahd);
1594 ahd_unpause(ahd);
1595 } else if ((status0 & (SELDI|SELDO)) != 0) {
1596 ahd_iocell_first_selection(ahd);
1597 ahd_unpause(ahd);
1598 } else if (status3 != 0) {
1599 printf("%s: SCSI Cell parity error SSTAT3 == 0x%x\n",
1600 ahd_name(ahd), status3);
1601 ahd_outb(ahd, CLRSINT3, status3);
1602 } else if ((lqistat1 & (LQIPHASE_LQ|LQIPHASE_NLQ)) != 0) {
1603 ahd_handle_lqiphase_error(ahd, lqistat1);
1604 } else if ((lqistat1 & LQICRCI_NLQ) != 0) {
1605 /*
1606 * This status can be delayed during some
1607 * streaming operations. The SCSIPHASE
1608 * handler has already dealt with this case
1609 * so just clear the error.
1610 */
1611 ahd_outb(ahd, CLRLQIINT1, CLRLQICRCI_NLQ);
1612 } else if ((status & BUSFREE) != 0) {
1613 u_int lqostat1;
1614 int restart;
1615 int clear_fifo;
1616 int packetized;
1617 u_int mode;
1618
1619 /*
1620 * Clear our selection hardware as soon as possible.
1621 * We may have an entry in the waiting Q for this target,
1622 * that is affected by this busfree and we don't want to
1623 * go about selecting the target while we handle the event.
1624 */
1625 ahd_outb(ahd, SCSISEQ0, 0);
1626
1627 /*
1628 * Determine what we were up to at the time of
1629 * the busfree.
1630 */
1631 mode = AHD_MODE_SCSI;
1632 busfreetime = ahd_inb(ahd, SSTAT2) & BUSFREETIME;
1633 lqostat1 = ahd_inb(ahd, LQOSTAT1);
1634 switch (busfreetime) {
1635 case BUSFREE_DFF0:
1636 case BUSFREE_DFF1:
1637 {
1638 u_int scbid;
1639 struct scb *scb;
1640
1641 mode = busfreetime == BUSFREE_DFF0
1642 ? AHD_MODE_DFF0 : AHD_MODE_DFF1;
1643 ahd_set_modes(ahd, mode, mode);
1644 scbid = ahd_get_scbptr(ahd);
1645 scb = ahd_lookup_scb(ahd, scbid);
1646 if (scb == NULL) {
1647 printf("%s: Invalid SCB %d in DFF%d "
1648 "during unexpected busfree\n",
1649 ahd_name(ahd), scbid, mode);
1650 packetized = 0;
1651 } else
1652 packetized = (scb->flags & SCB_PACKETIZED) != 0;
1653 clear_fifo = 1;
1654 break;
1655 }
1656 case BUSFREE_LQO:
1657 clear_fifo = 0;
1658 packetized = 1;
1659 break;
1660 default:
1661 clear_fifo = 0;
1662 packetized = (lqostat1 & LQOBUSFREE) != 0;
1663 if (!packetized
1664 && ahd_inb(ahd, LASTPHASE) == P_BUSFREE)
1665 packetized = 1;
1666 break;
1667 }
1668
1669 #ifdef AHD_DEBUG
1670 if ((ahd_debug & AHD_SHOW_MISC) != 0)
1671 printf("Saw Busfree. Busfreetime = 0x%x.\n",
1672 busfreetime);
1673 #endif
1674 /*
1675 * Busfrees that occur in non-packetized phases are
1676 * handled by the nonpkt_busfree handler.
1677 */
1678 if (packetized && ahd_inb(ahd, LASTPHASE) == P_BUSFREE) {
1679 restart = ahd_handle_pkt_busfree(ahd, busfreetime);
1680 } else {
1681 packetized = 0;
1682 restart = ahd_handle_nonpkt_busfree(ahd);
1683 }
1684 /*
1685 * Clear the busfree interrupt status. The setting of
1686 * the interrupt is a pulse, so in a perfect world, we
1687 * would not need to muck with the ENBUSFREE logic. This
1688 * would ensure that if the bus moves on to another
1689 * connection, busfree protection is still in force. If
1690 * BUSFREEREV is broken, however, we must manually clear
1691 * the ENBUSFREE if the busfree occurred during a non-pack
1692 * connection so that we don't get false positives during
1693 * future, packetized, connections.
1694 */
1695 ahd_outb(ahd, CLRSINT1, CLRBUSFREE);
1696 if (packetized == 0
1697 && (ahd->bugs & AHD_BUSFREEREV_BUG) != 0)
1698 ahd_outb(ahd, SIMODE1,
1699 ahd_inb(ahd, SIMODE1) & ~ENBUSFREE);
1700
1701 if (clear_fifo)
1702 ahd_clear_fifo(ahd, mode);
1703
1704 ahd_clear_msg_state(ahd);
1705 ahd_outb(ahd, CLRINT, CLRSCSIINT);
1706 if (restart) {
1707 ahd_restart(ahd);
1708 } else {
1709 ahd_unpause(ahd);
1710 }
1711 } else {
1712 printf("%s: Missing case in ahd_handle_scsiint. status = %x\n",
1713 ahd_name(ahd), status);
1714 ahd_dump_card_state(ahd);
1715 ahd_clear_intstat(ahd);
1716 ahd_unpause(ahd);
1717 }
1718 }
1719
1720 static void
1721 ahd_handle_transmission_error(struct ahd_softc *ahd)
1722 {
1723 struct scb *scb;
1724 u_int scbid;
1725 u_int lqistat1;
1726 u_int lqistat2;
1727 u_int msg_out;
1728 u_int curphase;
1729 u_int lastphase;
1730 u_int perrdiag;
1731 u_int cur_col;
1732 int silent;
1733
1734 scb = NULL;
1735 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
1736 lqistat1 = ahd_inb(ahd, LQISTAT1) & ~(LQIPHASE_LQ|LQIPHASE_NLQ);
1737 lqistat2 = ahd_inb(ahd, LQISTAT2);
1738 if ((lqistat1 & (LQICRCI_NLQ|LQICRCI_LQ)) == 0
1739 && (ahd->bugs & AHD_NLQICRC_DELAYED_BUG) != 0) {
1740 u_int lqistate;
1741
1742 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
1743 lqistate = ahd_inb(ahd, LQISTATE);
1744 if ((lqistate >= 0x1E && lqistate <= 0x24)
1745 || (lqistate == 0x29)) {
1746 #ifdef AHD_DEBUG
1747 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) {
1748 printf("%s: NLQCRC found via LQISTATE\n",
1749 ahd_name(ahd));
1750 }
1751 #endif
1752 lqistat1 |= LQICRCI_NLQ;
1753 }
1754 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
1755 }
1756
1757 ahd_outb(ahd, CLRLQIINT1, lqistat1);
1758 lastphase = ahd_inb(ahd, LASTPHASE);
1759 curphase = ahd_inb(ahd, SCSISIGI) & PHASE_MASK;
1760 perrdiag = ahd_inb(ahd, PERRDIAG);
1761 msg_out = MSG_INITIATOR_DET_ERR;
1762 ahd_outb(ahd, CLRSINT1, CLRSCSIPERR);
1763
1764 /*
1765 * Try to find the SCB associated with this error.
1766 */
1767 silent = FALSE;
1768 if (lqistat1 == 0
1769 || (lqistat1 & LQICRCI_NLQ) != 0) {
1770 if ((lqistat1 & (LQICRCI_NLQ|LQIOVERI_NLQ)) != 0)
1771 ahd_set_active_fifo(ahd);
1772 scbid = ahd_get_scbptr(ahd);
1773 scb = ahd_lookup_scb(ahd, scbid);
1774 if (scb != NULL && SCB_IS_SILENT(scb))
1775 silent = TRUE;
1776 }
1777
1778 cur_col = 0;
1779 if (silent == FALSE) {
1780 printf("%s: Transmission error detected\n", ahd_name(ahd));
1781 ahd_lqistat1_print(lqistat1, &cur_col, 50);
1782 ahd_lastphase_print(lastphase, &cur_col, 50);
1783 ahd_scsisigi_print(curphase, &cur_col, 50);
1784 ahd_perrdiag_print(perrdiag, &cur_col, 50);
1785 printf("\n");
1786 ahd_dump_card_state(ahd);
1787 }
1788
1789 if ((lqistat1 & (LQIOVERI_LQ|LQIOVERI_NLQ)) != 0) {
1790 if (silent == FALSE) {
1791 printf("%s: Gross protocol error during incoming "
1792 "packet. lqistat1 == 0x%x. Resetting bus.\n",
1793 ahd_name(ahd), lqistat1);
1794 }
1795 ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
1796 return;
1797 } else if ((lqistat1 & LQICRCI_LQ) != 0) {
1798 /*
1799 * A CRC error has been detected on an incoming LQ.
1800 * The bus is currently hung on the last ACK.
1801 * Hit LQIRETRY to release the last ack, and
1802 * wait for the sequencer to determine that ATNO
1803 * is asserted while in message out to take us
1804 * to our host message loop. No NONPACKREQ or
1805 * LQIPHASE type errors will occur in this
1806 * scenario. After this first LQIRETRY, the LQI
1807 * manager will be in ISELO where it will
1808 * happily sit until another packet phase begins.
1809 * Unexpected bus free detection is enabled
1810 * through any phases that occur after we release
1811 * this last ack until the LQI manager sees a
1812 * packet phase. This implies we may have to
1813 * ignore a perfectly valid "unexected busfree"
1814 * after our "initiator detected error" message is
1815 * sent. A busfree is the expected response after
1816 * we tell the target that it's L_Q was corrupted.
1817 * (SPI4R09 10.7.3.3.3)
1818 */
1819 ahd_outb(ahd, LQCTL2, LQIRETRY);
1820 printf("LQIRetry for LQICRCI_LQ to release ACK\n");
1821 } else if ((lqistat1 & LQICRCI_NLQ) != 0) {
1822 /*
1823 * We detected a CRC error in a NON-LQ packet.
1824 * The hardware has varying behavior in this situation
1825 * depending on whether this packet was part of a
1826 * stream or not.
1827 *
1828 * PKT by PKT mode:
1829 * The hardware has already acked the complete packet.
1830 * If the target honors our outstanding ATN condition,
1831 * we should be (or soon will be) in MSGOUT phase.
1832 * This will trigger the LQIPHASE_LQ status bit as the
1833 * hardware was expecting another LQ. Unexpected
1834 * busfree detection is enabled. Once LQIPHASE_LQ is
1835 * true (first entry into host message loop is much
1836 * the same), we must clear LQIPHASE_LQ and hit
1837 * LQIRETRY so the hardware is ready to handle
1838 * a future LQ. NONPACKREQ will not be asserted again
1839 * once we hit LQIRETRY until another packet is
1840 * processed. The target may either go busfree
1841 * or start another packet in response to our message.
1842 *
1843 * Read Streaming P0 asserted:
1844 * If we raise ATN and the target completes the entire
1845 * stream (P0 asserted during the last packet), the
1846 * hardware will ack all data and return to the ISTART
1847 * state. When the target reponds to our ATN condition,
1848 * LQIPHASE_LQ will be asserted. We should respond to
1849 * this with an LQIRETRY to prepare for any future
1850 * packets. NONPACKREQ will not be asserted again
1851 * once we hit LQIRETRY until another packet is
1852 * processed. The target may either go busfree or
1853 * start another packet in response to our message.
1854 * Busfree detection is enabled.
1855 *
1856 * Read Streaming P0 not asserted:
1857 * If we raise ATN and the target transitions to
1858 * MSGOUT in or after a packet where P0 is not
1859 * asserted, the hardware will assert LQIPHASE_NLQ.
1860 * We should respond to the LQIPHASE_NLQ with an
1861 * LQIRETRY. Should the target stay in a non-pkt
1862 * phase after we send our message, the hardware
1863 * will assert LQIPHASE_LQ. Recovery is then just as
1864 * listed above for the read streaming with P0 asserted.
1865 * Busfree detection is enabled.
1866 */
1867 if (silent == FALSE)
1868 printf("LQICRC_NLQ\n");
1869 if (scb == NULL) {
1870 printf("%s: No SCB valid for LQICRC_NLQ. "
1871 "Resetting bus\n", ahd_name(ahd));
1872 ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
1873 return;
1874 }
1875 } else if ((lqistat1 & LQIBADLQI) != 0) {
1876 printf("Need to handle BADLQI!\n");
1877 ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
1878 return;
1879 } else if ((perrdiag & (PARITYERR|PREVPHASE)) == PARITYERR) {
1880 if ((curphase & ~P_DATAIN_DT) != 0) {
1881 /* Ack the byte. So we can continue. */
1882 if (silent == FALSE)
1883 printf("Acking %s to clear perror\n",
1884 ahd_lookup_phase_entry(curphase)->phasemsg);
1885 ahd_inb(ahd, SCSIDAT);
1886 }
1887
1888 if (curphase == P_MESGIN)
1889 msg_out = MSG_PARITY_ERROR;
1890 }
1891
1892 /*
1893 * We've set the hardware to assert ATN if we
1894 * get a parity error on "in" phases, so all we
1895 * need to do is stuff the message buffer with
1896 * the appropriate message. "In" phases have set
1897 * mesg_out to something other than MSG_NOP.
1898 */
1899 ahd->send_msg_perror = msg_out;
1900 if (scb != NULL && msg_out == MSG_INITIATOR_DET_ERR)
1901 scb->flags |= SCB_TRANSMISSION_ERROR;
1902 ahd_outb(ahd, MSG_OUT, HOST_MSG);
1903 ahd_outb(ahd, CLRINT, CLRSCSIINT);
1904 ahd_unpause(ahd);
1905 }
1906
1907 static void
1908 ahd_handle_lqiphase_error(struct ahd_softc *ahd, u_int lqistat1)
1909 {
1910 /*
1911 * Clear the sources of the interrupts.
1912 */
1913 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
1914 ahd_outb(ahd, CLRLQIINT1, lqistat1);
1915
1916 /*
1917 * If the "illegal" phase changes were in response
1918 * to our ATN to flag a CRC error, AND we ended up
1919 * on packet boundaries, clear the error, restart the
1920 * LQI manager as appropriate, and go on our merry
1921 * way toward sending the message. Otherwise, reset
1922 * the bus to clear the error.
1923 */
1924 ahd_set_active_fifo(ahd);
1925 if ((ahd_inb(ahd, SCSISIGO) & ATNO) != 0
1926 && (ahd_inb(ahd, MDFFSTAT) & DLZERO) != 0) {
1927 if ((lqistat1 & LQIPHASE_LQ) != 0) {
1928 printf("LQIRETRY for LQIPHASE_LQ\n");
1929 ahd_outb(ahd, LQCTL2, LQIRETRY);
1930 } else if ((lqistat1 & LQIPHASE_NLQ) != 0) {
1931 printf("LQIRETRY for LQIPHASE_NLQ\n");
1932 ahd_outb(ahd, LQCTL2, LQIRETRY);
1933 } else
1934 panic("ahd_handle_lqiphase_error: No phase errors\n");
1935 ahd_dump_card_state(ahd);
1936 ahd_outb(ahd, CLRINT, CLRSCSIINT);
1937 ahd_unpause(ahd);
1938 } else {
1939 printf("Reseting Channel for LQI Phase error\n");
1940 ahd_dump_card_state(ahd);
1941 ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
1942 }
1943 }
1944
1945 /*
1946 * Packetized unexpected or expected busfree.
1947 * Entered in mode based on busfreetime.
1948 */
1949 static int
1950 ahd_handle_pkt_busfree(struct ahd_softc *ahd, u_int busfreetime)
1951 {
1952 u_int lqostat1;
1953
1954 AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK),
1955 ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK));
1956 lqostat1 = ahd_inb(ahd, LQOSTAT1);
1957 if ((lqostat1 & LQOBUSFREE) != 0) {
1958 struct scb *scb;
1959 u_int scbid;
1960 u_int saved_scbptr;
1961 u_int waiting_h;
1962 u_int waiting_t;
1963 u_int next;
1964
1965 if ((busfreetime & BUSFREE_LQO) == 0)
1966 printf("%s: Warning, BUSFREE time is 0x%x. "
1967 "Expected BUSFREE_LQO.\n",
1968 ahd_name(ahd), busfreetime);
1969 /*
1970 * The LQO manager detected an unexpected busfree
1971 * either:
1972 *
1973 * 1) During an outgoing LQ.
1974 * 2) After an outgoing LQ but before the first
1975 * REQ of the command packet.
1976 * 3) During an outgoing command packet.
1977 *
1978 * In all cases, CURRSCB is pointing to the
1979 * SCB that encountered the failure. Clean
1980 * up the queue, clear SELDO and LQOBUSFREE,
1981 * and allow the sequencer to restart the select
1982 * out at its lesure.
1983 */
1984 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
1985 scbid = ahd_inw(ahd, CURRSCB);
1986 scb = ahd_lookup_scb(ahd, scbid);
1987 if (scb == NULL)
1988 panic("SCB not valid during LQOBUSFREE");
1989 /*
1990 * Clear the status.
1991 */
1992 ahd_outb(ahd, CLRLQOINT1, CLRLQOBUSFREE);
1993 if ((ahd->bugs & AHD_CLRLQO_AUTOCLR_BUG) != 0)
1994 ahd_outb(ahd, CLRLQOINT1, 0);
1995 ahd_outb(ahd, SCSISEQ0, ahd_inb(ahd, SCSISEQ0) & ~ENSELO);
1996 ahd_flush_device_writes(ahd);
1997 ahd_outb(ahd, CLRSINT0, CLRSELDO);
1998
1999 /*
2000 * Return the LQO manager to its idle loop. It will
2001 * not do this automatically if the busfree occurs
2002 * after the first REQ of either the LQ or command
2003 * packet or between the LQ and command packet.
2004 */
2005 ahd_outb(ahd, LQCTL2, ahd_inb(ahd, LQCTL2) | LQOTOIDLE);
2006
2007 /*
2008 * Update the waiting for selection queue so
2009 * we restart on the correct SCB.
2010 */
2011 waiting_h = ahd_inw(ahd, WAITING_TID_HEAD);
2012 saved_scbptr = ahd_get_scbptr(ahd);
2013 if (waiting_h != scbid) {
2014
2015 ahd_outw(ahd, WAITING_TID_HEAD, scbid);
2016 waiting_t = ahd_inw(ahd, WAITING_TID_TAIL);
2017 if (waiting_t == waiting_h) {
2018 ahd_outw(ahd, WAITING_TID_TAIL, scbid);
2019 next = SCB_LIST_NULL;
2020 } else {
2021 ahd_set_scbptr(ahd, waiting_h);
2022 next = ahd_inw_scbram(ahd, SCB_NEXT2);
2023 }
2024 ahd_set_scbptr(ahd, scbid);
2025 ahd_outw(ahd, SCB_NEXT2, next);
2026 }
2027 ahd_set_scbptr(ahd, saved_scbptr);
2028 if (scb->crc_retry_count < AHD_MAX_LQ_CRC_ERRORS) {
2029 if (SCB_IS_SILENT(scb) == FALSE) {
2030 ahd_print_path(ahd, scb);
2031 printf("Probable outgoing LQ CRC error. "
2032 "Retrying command\n");
2033 }
2034 scb->crc_retry_count++;
2035 } else {
2036 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
2037 ahd_freeze_scb(scb);
2038 ahd_freeze_devq(ahd, scb);
2039 }
2040 /* Return unpausing the sequencer. */
2041 return (0);
2042 } else if ((ahd_inb(ahd, PERRDIAG) & PARITYERR) != 0) {
2043 /*
2044 * Ignore what are really parity errors that
2045 * occur on the last REQ of a free running
2046 * clock prior to going busfree. Some drives
2047 * do not properly active negate just before
2048 * going busfree resulting in a parity glitch.
2049 */
2050 ahd_outb(ahd, CLRSINT1, CLRSCSIPERR|CLRBUSFREE);
2051 #ifdef AHD_DEBUG
2052 if ((ahd_debug & AHD_SHOW_MASKED_ERRORS) != 0)
2053 printf("%s: Parity on last REQ detected "
2054 "during busfree phase.\n",
2055 ahd_name(ahd));
2056 #endif
2057 /* Return unpausing the sequencer. */
2058 return (0);
2059 }
2060 if (ahd->src_mode != AHD_MODE_SCSI) {
2061 u_int scbid;
2062 struct scb *scb;
2063
2064 scbid = ahd_get_scbptr(ahd);
2065 scb = ahd_lookup_scb(ahd, scbid);
2066 ahd_print_path(ahd, scb);
2067 printf("Unexpected PKT busfree condition\n");
2068 ahd_dump_card_state(ahd);
2069 ahd_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 'A',
2070 SCB_GET_LUN(scb), SCB_GET_TAG(scb),
2071 ROLE_INITIATOR, CAM_UNEXP_BUSFREE);
2072
2073 /* Return restarting the sequencer. */
2074 return (1);
2075 }
2076 printf("%s: Unexpected PKT busfree condition\n", ahd_name(ahd));
2077 ahd_dump_card_state(ahd);
2078 /* Restart the sequencer. */
2079 return (1);
2080 }
2081
2082 /*
2083 * Non-packetized unexpected or expected busfree.
2084 */
2085 static int
2086 ahd_handle_nonpkt_busfree(struct ahd_softc *ahd)
2087 {
2088 struct ahd_devinfo devinfo;
2089 struct scb *scb;
2090 u_int lastphase;
2091 u_int saved_scsiid;
2092 u_int saved_lun;
2093 u_int target;
2094 u_int initiator_role_id;
2095 u_int scbid;
2096 u_int ppr_busfree;
2097 int printerror;
2098
2099 /*
2100 * Look at what phase we were last in. If its message out,
2101 * chances are pretty good that the busfree was in response
2102 * to one of our abort requests.
2103 */
2104 lastphase = ahd_inb(ahd, LASTPHASE);
2105 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2106 saved_lun = ahd_inb(ahd, SAVED_LUN);
2107 target = SCSIID_TARGET(ahd, saved_scsiid);
2108 initiator_role_id = SCSIID_OUR_ID(saved_scsiid);
2109 ahd_compile_devinfo(&devinfo, initiator_role_id,
2110 target, saved_lun, 'A', ROLE_INITIATOR);
2111 printerror = 1;
2112
2113 scbid = ahd_get_scbptr(ahd);
2114 scb = ahd_lookup_scb(ahd, scbid);
2115 if (scb != NULL
2116 && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) != 0)
2117 scb = NULL;
2118
2119 ppr_busfree = (ahd->msg_flags & MSG_FLAG_EXPECT_PPR_BUSFREE) != 0;
2120 if (lastphase == P_MESGOUT) {
2121 u_int tag;
2122
2123 tag = SCB_LIST_NULL;
2124 if (ahd_sent_msg(ahd, AHDMSG_1B, MSG_ABORT_TAG, TRUE)
2125 || ahd_sent_msg(ahd, AHDMSG_1B, MSG_ABORT, TRUE)) {
2126 int found;
2127 int sent_msg;
2128
2129 if (scb == NULL) {
2130 ahd_print_devinfo(ahd, &devinfo);
2131 printf("Abort for unidentified "
2132 "connection completed.\n");
2133 /* restart the sequencer. */
2134 return (1);
2135 }
2136 sent_msg = ahd->msgout_buf[ahd->msgout_index - 1];
2137 ahd_print_path(ahd, scb);
2138 printf("SCB %d - Abort%s Completed.\n",
2139 SCB_GET_TAG(scb),
2140 sent_msg == MSG_ABORT_TAG ? "" : " Tag");
2141
2142 if (sent_msg == MSG_ABORT_TAG)
2143 tag = SCB_GET_TAG(scb);
2144
2145 if ((scb->flags & SCB_CMDPHASE_ABORT) != 0) {
2146 /*
2147 * This abort is in response to an
2148 * unexpected switch to command phase
2149 * for a packetized connection. Since
2150 * the identify message was never sent,
2151 * "saved lun" is 0. We really want to
2152 * abort only the SCB that encountered
2153 * this error, which could have a different
2154 * lun. The SCB will be retried so the OS
2155 * will see the UA after renegotiating to
2156 * packetized.
2157 */
2158 tag = SCB_GET_TAG(scb);
2159 saved_lun = scb->hscb->lun;
2160 }
2161 found = ahd_abort_scbs(ahd, target, 'A', saved_lun,
2162 tag, ROLE_INITIATOR,
2163 CAM_REQ_ABORTED);
2164 printf("found == 0x%x\n", found);
2165 printerror = 0;
2166 } else if (ahd_sent_msg(ahd, AHDMSG_1B,
2167 MSG_BUS_DEV_RESET, TRUE)) {
2168 #ifdef __FreeBSD__
2169 /*
2170 * Don't mark the user's request for this BDR
2171 * as completing with CAM_BDR_SENT. CAM3
2172 * specifies CAM_REQ_CMP.
2173 */
2174 if (scb != NULL
2175 && scb->io_ctx->ccb_h.func_code== XPT_RESET_DEV
2176 && ahd_match_scb(ahd, scb, target, 'A',
2177 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2178 ROLE_INITIATOR))
2179 ahd_set_transaction_status(scb, CAM_REQ_CMP);
2180 #endif
2181 ahd_handle_devreset(ahd, &devinfo, CAM_LUN_WILDCARD,
2182 CAM_BDR_SENT, "Bus Device Reset",
2183 /*verbose_level*/0);
2184 printerror = 0;
2185 } else if (ahd_sent_msg(ahd, AHDMSG_EXT, MSG_EXT_PPR, FALSE)
2186 && ppr_busfree == 0) {
2187 struct ahd_initiator_tinfo *tinfo;
2188 struct ahd_tmode_tstate *tstate;
2189
2190 /*
2191 * PPR Rejected. Try non-ppr negotiation
2192 * and retry command.
2193 */
2194 #ifdef AHD_DEBUG
2195 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
2196 printf("PPR negotiation rejected busfree.\n");
2197 #endif
2198 tinfo = ahd_fetch_transinfo(ahd, devinfo.channel,
2199 devinfo.our_scsiid,
2200 devinfo.target, &tstate);
2201 tinfo->curr.transport_version = 2;
2202 tinfo->goal.transport_version = 2;
2203 tinfo->goal.ppr_options = 0;
2204 ahd_qinfifo_requeue_tail(ahd, scb);
2205 printerror = 0;
2206 } else if (ahd_sent_msg(ahd, AHDMSG_EXT, MSG_EXT_WDTR, FALSE)
2207 && ppr_busfree == 0) {
2208 /*
2209 * Negotiation Rejected. Go-narrow and
2210 * retry command.
2211 */
2212 #ifdef AHD_DEBUG
2213 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
2214 printf("WDTR negotiation rejected busfree.\n");
2215 #endif
2216 ahd_set_width(ahd, &devinfo,
2217 MSG_EXT_WDTR_BUS_8_BIT,
2218 AHD_TRANS_CUR|AHD_TRANS_GOAL,
2219 /*paused*/TRUE);
2220 ahd_qinfifo_requeue_tail(ahd, scb);
2221 printerror = 0;
2222 } else if (ahd_sent_msg(ahd, AHDMSG_EXT, MSG_EXT_SDTR, FALSE)
2223 && ppr_busfree == 0) {
2224 /*
2225 * Negotiation Rejected. Go-async and
2226 * retry command.
2227 */
2228 #ifdef AHD_DEBUG
2229 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
2230 printf("SDTR negotiation rejected busfree.\n");
2231 #endif
2232 ahd_set_syncrate(ahd, &devinfo,
2233 /*period*/0, /*offset*/0,
2234 /*ppr_options*/0,
2235 AHD_TRANS_CUR|AHD_TRANS_GOAL,
2236 /*paused*/TRUE);
2237 ahd_qinfifo_requeue_tail(ahd, scb);
2238 printerror = 0;
2239 } else if ((ahd->msg_flags & MSG_FLAG_EXPECT_IDE_BUSFREE) != 0
2240 && ahd_sent_msg(ahd, AHDMSG_1B,
2241 MSG_INITIATOR_DET_ERR, TRUE)) {
2242
2243 #ifdef AHD_DEBUG
2244 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
2245 printf("Expected IDE Busfree\n");
2246 #endif
2247 printerror = 0;
2248 } else if ((ahd->msg_flags & MSG_FLAG_EXPECT_QASREJ_BUSFREE)
2249 && ahd_sent_msg(ahd, AHDMSG_1B,
2250 MSG_MESSAGE_REJECT, TRUE)) {
2251
2252 #ifdef AHD_DEBUG
2253 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
2254 printf("Expected QAS Reject Busfree\n");
2255 #endif
2256 printerror = 0;
2257 }
2258 }
2259
2260 /*
2261 * The busfree required flag is honored at the end of
2262 * the message phases. We check it last in case we
2263 * had to send some other message that caused a busfree.
2264 */
2265 if (printerror != 0
2266 && (lastphase == P_MESGIN || lastphase == P_MESGOUT)
2267 && ((ahd->msg_flags & MSG_FLAG_EXPECT_PPR_BUSFREE) != 0)) {
2268
2269 ahd_freeze_devq(ahd, scb);
2270 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2271 ahd_freeze_scb(scb);
2272 if ((ahd->msg_flags & MSG_FLAG_IU_REQ_CHANGED) != 0) {
2273 ahd_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
2274 SCB_GET_CHANNEL(ahd, scb),
2275 SCB_GET_LUN(scb), SCB_LIST_NULL,
2276 ROLE_INITIATOR, CAM_REQ_ABORTED);
2277 } else {
2278 #ifdef AHD_DEBUG
2279 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
2280 printf("PPR Negotiation Busfree.\n");
2281 #endif
2282 ahd_done(ahd, scb);
2283 }
2284 printerror = 0;
2285 }
2286 if (printerror != 0) {
2287 int aborted;
2288
2289 aborted = 0;
2290 if (scb != NULL) {
2291 u_int tag;
2292
2293 if ((scb->hscb->control & TAG_ENB) != 0)
2294 tag = SCB_GET_TAG(scb);
2295 else
2296 tag = SCB_LIST_NULL;
2297 ahd_print_path(ahd, scb);
2298 aborted = ahd_abort_scbs(ahd, target, 'A',
2299 SCB_GET_LUN(scb), tag,
2300 ROLE_INITIATOR,
2301 CAM_UNEXP_BUSFREE);
2302 } else {
2303 /*
2304 * We had not fully identified this connection,
2305 * so we cannot abort anything.
2306 */
2307 printf("%s: ", ahd_name(ahd));
2308 }
2309 if (lastphase != P_BUSFREE)
2310 ahd_force_renegotiation(ahd, &devinfo);
2311 printf("Unexpected busfree %s, %d SCBs aborted, "
2312 "PRGMCNT == 0x%x\n",
2313 ahd_lookup_phase_entry(lastphase)->phasemsg,
2314 aborted,
2315 ahd_inb(ahd, PRGMCNT)
2316 | (ahd_inb(ahd, PRGMCNT+1) << 8));
2317 ahd_dump_card_state(ahd);
2318 }
2319 /* Always restart the sequencer. */
2320 return (1);
2321 }
2322
2323 static void
2324 ahd_handle_proto_violation(struct ahd_softc *ahd)
2325 {
2326 struct ahd_devinfo devinfo;
2327 struct scb *scb;
2328 u_int scbid;
2329 u_int seq_flags;
2330 u_int curphase;
2331 u_int lastphase;
2332 int found;
2333
2334 ahd_fetch_devinfo(ahd, &devinfo);
2335 scbid = ahd_get_scbptr(ahd);
2336 scb = ahd_lookup_scb(ahd, scbid);
2337 seq_flags = ahd_inb(ahd, SEQ_FLAGS);
2338 curphase = ahd_inb(ahd, SCSISIGI) & PHASE_MASK;
2339 lastphase = ahd_inb(ahd, LASTPHASE);
2340 if ((seq_flags & NOT_IDENTIFIED) != 0) {
2341
2342 /*
2343 * The reconnecting target either did not send an
2344 * identify message, or did, but we didn't find an SCB
2345 * to match.
2346 */
2347 ahd_print_devinfo(ahd, &devinfo);
2348 printf("Target did not send an IDENTIFY message. "
2349 "LASTPHASE = 0x%x.\n", lastphase);
2350 scb = NULL;
2351 } else if (scb == NULL) {
2352 /*
2353 * We don't seem to have an SCB active for this
2354 * transaction. Print an error and reset the bus.
2355 */
2356 ahd_print_devinfo(ahd, &devinfo);
2357 printf("No SCB found during protocol violation\n");
2358 goto proto_violation_reset;
2359 } else {
2360 ahd_set_transaction_status(scb, CAM_SEQUENCE_FAIL);
2361 if ((seq_flags & NO_CDB_SENT) != 0) {
2362 ahd_print_path(ahd, scb);
2363 printf("No or incomplete CDB sent to device.\n");
2364 } else if ((ahd_inb_scbram(ahd, SCB_CONTROL)
2365 & STATUS_RCVD) == 0) {
2366 /*
2367 * The target never bothered to provide status to
2368 * us prior to completing the command. Since we don't
2369 * know the disposition of this command, we must attempt
2370 * to abort it. Assert ATN and prepare to send an abort
2371 * message.
2372 */
2373 ahd_print_path(ahd, scb);
2374 printf("Completed command without status.\n");
2375 } else {
2376 ahd_print_path(ahd, scb);
2377 printf("Unknown protocol violation.\n");
2378 ahd_dump_card_state(ahd);
2379 }
2380 }
2381 if ((lastphase & ~P_DATAIN_DT) == 0
2382 || lastphase == P_COMMAND) {
2383 proto_violation_reset:
2384 /*
2385 * Target either went directly to data
2386 * phase or didn't respond to our ATN.
2387 * The only safe thing to do is to blow
2388 * it away with a bus reset.
2389 */
2390 found = ahd_reset_channel(ahd, 'A', TRUE);
2391 printf("%s: Issued Channel %c Bus Reset. "
2392 "%d SCBs aborted\n", ahd_name(ahd), 'A', found);
2393 } else {
2394 /*
2395 * Leave the selection hardware off in case
2396 * this abort attempt will affect yet to
2397 * be sent commands.
2398 */
2399 ahd_outb(ahd, SCSISEQ0,
2400 ahd_inb(ahd, SCSISEQ0) & ~ENSELO);
2401 ahd_assert_atn(ahd);
2402 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2403 if (scb == NULL) {
2404 ahd_print_devinfo(ahd, &devinfo);
2405 ahd->msgout_buf[0] = MSG_ABORT_TASK;
2406 ahd->msgout_len = 1;
2407 ahd->msgout_index = 0;
2408 ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2409 } else {
2410 ahd_print_path(ahd, scb);
2411 scb->flags |= SCB_ABORT;
2412 }
2413 printf("Protocol violation %s. Attempting to abort.\n",
2414 ahd_lookup_phase_entry(curphase)->phasemsg);
2415 }
2416 }
2417
2418 /*
2419 * Force renegotiation to occur the next time we initiate
2420 * a command to the current device.
2421 */
2422 static void
2423 ahd_force_renegotiation(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
2424 {
2425 struct ahd_initiator_tinfo *targ_info;
2426 struct ahd_tmode_tstate *tstate;
2427
2428 #ifdef AHD_DEBUG
2429 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) {
2430 ahd_print_devinfo(ahd, devinfo);
2431 printf("Forcing renegotiation\n");
2432 }
2433 #endif
2434 targ_info = ahd_fetch_transinfo(ahd,
2435 devinfo->channel,
2436 devinfo->our_scsiid,
2437 devinfo->target,
2438 &tstate);
2439 ahd_update_neg_request(ahd, devinfo, tstate,
2440 targ_info, AHD_NEG_IF_NON_ASYNC);
2441 }
2442
2443 #define AHD_MAX_STEPS 2000
2444 void
2445 ahd_clear_critical_section(struct ahd_softc *ahd)
2446 {
2447 ahd_mode_state saved_modes;
2448 int stepping;
2449 int steps;
2450 int first_instr;
2451 u_int simode0;
2452 u_int simode1;
2453 u_int simode3;
2454 u_int lqimode0;
2455 u_int lqimode1;
2456 u_int lqomode0;
2457 u_int lqomode1;
2458
2459 if (ahd->num_critical_sections == 0)
2460 return;
2461
2462 stepping = FALSE;
2463 steps = 0;
2464 first_instr = 0;
2465 simode0 = 0;
2466 simode1 = 0;
2467 simode3 = 0;
2468 lqimode0 = 0;
2469 lqimode1 = 0;
2470 lqomode0 = 0;
2471 lqomode1 = 0;
2472 saved_modes = ahd_save_modes(ahd);
2473 for (;;) {
2474 struct cs *cs;
2475 u_int seqaddr;
2476 u_int i;
2477
2478 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2479 seqaddr = ahd_inb(ahd, CURADDR)
2480 | (ahd_inb(ahd, CURADDR+1) << 8);
2481
2482 cs = ahd->critical_sections;
2483 for (i = 0; i < ahd->num_critical_sections; i++, cs++) {
2484
2485 if (cs->begin < seqaddr && cs->end >= seqaddr)
2486 break;
2487 }
2488
2489 if (i == ahd->num_critical_sections)
2490 break;
2491
2492 if (steps > AHD_MAX_STEPS) {
2493 printf("%s: Infinite loop in critical section\n"
2494 "%s: First Instruction 0x%x now 0x%x\n",
2495 ahd_name(ahd), ahd_name(ahd), first_instr,
2496 seqaddr);
2497 ahd_dump_card_state(ahd);
2498 panic("critical section loop");
2499 }
2500
2501 steps++;
2502 #ifdef AHD_DEBUG
2503 if ((ahd_debug & AHD_SHOW_MISC) != 0)
2504 printf("%s: Single stepping at 0x%x\n", ahd_name(ahd),
2505 seqaddr);
2506 #endif
2507 if (stepping == FALSE) {
2508
2509 first_instr = seqaddr;
2510 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
2511 simode0 = ahd_inb(ahd, SIMODE0);
2512 simode3 = ahd_inb(ahd, SIMODE3);
2513 lqimode0 = ahd_inb(ahd, LQIMODE0);
2514 lqimode1 = ahd_inb(ahd, LQIMODE1);
2515 lqomode0 = ahd_inb(ahd, LQOMODE0);
2516 lqomode1 = ahd_inb(ahd, LQOMODE1);
2517 ahd_outb(ahd, SIMODE0, 0);
2518 ahd_outb(ahd, SIMODE3, 0);
2519 ahd_outb(ahd, LQIMODE0, 0);
2520 ahd_outb(ahd, LQIMODE1, 0);
2521 ahd_outb(ahd, LQOMODE0, 0);
2522 ahd_outb(ahd, LQOMODE1, 0);
2523 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2524 simode1 = ahd_inb(ahd, SIMODE1);
2525 /*
2526 * We don't clear ENBUSFREE. Unfortunately
2527 * we cannot re-enable busfree detection within
2528 * the current connection, so we must leave it
2529 * on while single stepping.
2530 */
2531 ahd_outb(ahd, SIMODE1, simode1 & ENBUSFREE);
2532 ahd_outb(ahd, SEQCTL0, ahd_inb(ahd, SEQCTL0) | STEP);
2533 stepping = TRUE;
2534 }
2535 ahd_outb(ahd, CLRSINT1, CLRBUSFREE);
2536 ahd_outb(ahd, CLRINT, CLRSCSIINT);
2537 ahd_set_modes(ahd, ahd->saved_src_mode, ahd->saved_dst_mode);
2538 ahd_outb(ahd, HCNTRL, ahd->unpause);
2539 while (!ahd_is_paused(ahd))
2540 ahd_delay(200);
2541 ahd_update_modes(ahd);
2542 }
2543 if (stepping) {
2544 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
2545 ahd_outb(ahd, SIMODE0, simode0);
2546 ahd_outb(ahd, SIMODE3, simode3);
2547 ahd_outb(ahd, LQIMODE0, lqimode0);
2548 ahd_outb(ahd, LQIMODE1, lqimode1);
2549 ahd_outb(ahd, LQOMODE0, lqomode0);
2550 ahd_outb(ahd, LQOMODE1, lqomode1);
2551 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2552 ahd_outb(ahd, SEQCTL0, ahd_inb(ahd, SEQCTL0) & ~STEP);
2553 ahd_outb(ahd, SIMODE1, simode1);
2554 /*
2555 * SCSIINT seems to glitch occassionally when
2556 * the interrupt masks are restored. Clear SCSIINT
2557 * one more time so that only persistent errors
2558 * are seen as a real interrupt.
2559 */
2560 ahd_outb(ahd, CLRINT, CLRSCSIINT);
2561 }
2562 ahd_restore_modes(ahd, saved_modes);
2563 }
2564
2565 /*
2566 * Clear any pending interrupt status.
2567 */
2568 void
2569 ahd_clear_intstat(struct ahd_softc *ahd)
2570 {
2571 AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK),
2572 ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK));
2573 /* Clear any interrupt conditions this may have caused */
2574 ahd_outb(ahd, CLRLQIINT0, CLRLQIATNQAS|CLRLQICRCT1|CLRLQICRCT2
2575 |CLRLQIBADLQT|CLRLQIATNLQ|CLRLQIATNCMD);
2576 ahd_outb(ahd, CLRLQIINT1, CLRLQIPHASE_LQ|CLRLQIPHASE_NLQ|CLRLIQABORT
2577 |CLRLQICRCI_LQ|CLRLQICRCI_NLQ|CLRLQIBADLQI
2578 |CLRLQIOVERI_LQ|CLRLQIOVERI_NLQ|CLRNONPACKREQ);
2579 ahd_outb(ahd, CLRLQOINT0, CLRLQOTARGSCBPERR|CLRLQOSTOPT2|CLRLQOATNLQ
2580 |CLRLQOATNPKT|CLRLQOTCRC);
2581 ahd_outb(ahd, CLRLQOINT1, CLRLQOINITSCBPERR|CLRLQOSTOPI2|CLRLQOBADQAS
2582 |CLRLQOBUSFREE|CLRLQOPHACHGINPKT);
2583 if ((ahd->bugs & AHD_CLRLQO_AUTOCLR_BUG) != 0) {
2584 ahd_outb(ahd, CLRLQOINT0, 0);
2585 ahd_outb(ahd, CLRLQOINT1, 0);
2586 }
2587 ahd_outb(ahd, CLRSINT3, CLRNTRAMPERR|CLROSRAMPERR);
2588 ahd_outb(ahd, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI
2589 |CLRBUSFREE|CLRSCSIPERR|CLRREQINIT);
2590 ahd_outb(ahd, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO
2591 |CLRIOERR|CLROVERRUN);
2592 ahd_outb(ahd, CLRINT, CLRSCSIINT);
2593 }
2594
2595 /**************************** Debugging Routines ******************************/
2596 #ifdef AHD_DEBUG
2597 uint32_t ahd_debug = AHD_DEBUG_OPTS;
2598 #endif
2599 void
2600 ahd_print_scb(struct scb *scb)
2601 {
2602 struct hardware_scb *hscb;
2603 int i;
2604
2605 hscb = scb->hscb;
2606 printf("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n",
2607 (void *)scb,
2608 hscb->control,
2609 hscb->scsiid,
2610 hscb->lun,
2611 hscb->cdb_len);
2612 printf("Shared Data: ");
2613 for (i = 0; i < sizeof(hscb->shared_data.idata.cdb); i++)
2614 printf("%#02x", hscb->shared_data.idata.cdb[i]);
2615 printf(" dataptr:%#x%x datacnt:%#x sgptr:%#x tag:%#x\n",
2616 (uint32_t)((ahd_le64toh(hscb->dataptr) >> 32) & 0xFFFFFFFF),
2617 (uint32_t)(ahd_le64toh(hscb->dataptr) & 0xFFFFFFFF),
2618 ahd_le32toh(hscb->datacnt),
2619 ahd_le32toh(hscb->sgptr),
2620 SCB_GET_TAG(scb));
2621 ahd_dump_sglist(scb);
2622 }
2623
2624 void
2625 ahd_dump_sglist(struct scb *scb)
2626 {
2627 int i;
2628
2629 if (scb->sg_count > 0) {
2630 if ((scb->ahd_softc->flags & AHD_64BIT_ADDRESSING) != 0) {
2631 struct ahd_dma64_seg *sg_list;
2632
2633 sg_list = (struct ahd_dma64_seg*)scb->sg_list;
2634 for (i = 0; i < scb->sg_count; i++) {
2635 uint64_t addr;
2636 uint32_t len;
2637
2638 addr = ahd_le64toh(sg_list[i].addr);
2639 len = ahd_le32toh(sg_list[i].len);
2640 printf("sg[%d] - Addr 0x%x%x : Length %d%s\n",
2641 i,
2642 (uint32_t)((addr >> 32) & 0xFFFFFFFF),
2643 (uint32_t)(addr & 0xFFFFFFFF),
2644 sg_list[i].len & AHD_SG_LEN_MASK,
2645 (sg_list[i].len & AHD_DMA_LAST_SEG)
2646 ? " Last" : "");
2647 }
2648 } else {
2649 struct ahd_dma_seg *sg_list;
2650
2651 sg_list = (struct ahd_dma_seg*)scb->sg_list;
2652 for (i = 0; i < scb->sg_count; i++) {
2653 uint32_t len;
2654
2655 len = ahd_le32toh(sg_list[i].len);
2656 printf("sg[%d] - Addr 0x%x%x : Length %d%s\n",
2657 i,
2658 (len & AHD_SG_HIGH_ADDR_MASK) >> 24,
2659 ahd_le32toh(sg_list[i].addr),
2660 len & AHD_SG_LEN_MASK,
2661 len & AHD_DMA_LAST_SEG ? " Last" : "");
2662 }
2663 }
2664 }
2665 }
2666
2667 /************************* Transfer Negotiation *******************************/
2668 /*
2669 * Allocate per target mode instance (ID we respond to as a target)
2670 * transfer negotiation data structures.
2671 */
2672 static struct ahd_tmode_tstate *
2673 ahd_alloc_tstate(struct ahd_softc *ahd, u_int scsi_id, char channel)
2674 {
2675 struct ahd_tmode_tstate *master_tstate;
2676 struct ahd_tmode_tstate *tstate;
2677 int i;
2678
2679 master_tstate = ahd->enabled_targets[ahd->our_id];
2680 if (ahd->enabled_targets[scsi_id] != NULL
2681 && ahd->enabled_targets[scsi_id] != master_tstate)
2682 panic("%s: ahd_alloc_tstate - Target already allocated",
2683 ahd_name(ahd));
2684 tstate = malloc(sizeof(*tstate), M_DEVBUF, M_NOWAIT);
2685 if (tstate == NULL)
2686 return (NULL);
2687
2688 /*
2689 * If we have allocated a master tstate, copy user settings from
2690 * the master tstate (taken from SRAM or the EEPROM) for this
2691 * channel, but reset our current and goal settings to async/narrow
2692 * until an initiator talks to us.
2693 */
2694 if (master_tstate != NULL) {
2695 memcpy(tstate, master_tstate, sizeof(*tstate));
2696 memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns));
2697 for (i = 0; i < 16; i++) {
2698 memset(&tstate->transinfo[i].curr, 0,
2699 sizeof(tstate->transinfo[i].curr));
2700 memset(&tstate->transinfo[i].goal, 0,
2701 sizeof(tstate->transinfo[i].goal));
2702 }
2703 } else
2704 memset(tstate, 0, sizeof(*tstate));
2705 ahd->enabled_targets[scsi_id] = tstate;
2706 return (tstate);
2707 }
2708
2709 #ifdef AHD_TARGET_MODE
2710 /*
2711 * Free per target mode instance (ID we respond to as a target)
2712 * transfer negotiation data structures.
2713 */
2714 static void
2715 ahd_free_tstate(struct ahd_softc *ahd, u_int scsi_id, char channel, int force)
2716 {
2717 struct ahd_tmode_tstate *tstate;
2718
2719 /*
2720 * Don't clean up our "master" tstate.
2721 * It has our default user settings.
2722 */
2723 if (scsi_id == ahd->our_id
2724 && force == FALSE)
2725 return;
2726
2727 tstate = ahd->enabled_targets[scsi_id];
2728 if (tstate != NULL)
2729 free(tstate, M_DEVBUF);
2730 ahd->enabled_targets[scsi_id] = NULL;
2731 }
2732 #endif
2733
2734 /*
2735 * Called when we have an active connection to a target on the bus,
2736 * this function finds the nearest period to the input period limited
2737 * by the capabilities of the bus connectivity of and sync settings for
2738 * the target.
2739 */
2740 void
2741 ahd_devlimited_syncrate(struct ahd_softc *ahd,
2742 struct ahd_initiator_tinfo *tinfo,
2743 u_int *period, u_int *ppr_options, role_t role)
2744 {
2745 struct ahd_transinfo *transinfo;
2746 u_int maxsync;
2747
2748 if ((ahd_inb(ahd, SBLKCTL) & ENAB40) != 0
2749 && (ahd_inb(ahd, SSTAT2) & EXP_ACTIVE) == 0) {
2750 maxsync = AHD_SYNCRATE_PACED;
2751 } else {
2752 maxsync = AHD_SYNCRATE_ULTRA;
2753 /* Can't do DT related options on an SE bus */
2754 *ppr_options &= MSG_EXT_PPR_QAS_REQ;
2755 }
2756 /*
2757 * Never allow a value higher than our current goal
2758 * period otherwise we may allow a target initiated
2759 * negotiation to go above the limit as set by the
2760 * user. In the case of an initiator initiated
2761 * sync negotiation, we limit based on the user
2762 * setting. This allows the system to still accept
2763 * incoming negotiations even if target initiated
2764 * negotiation is not performed.
2765 */
2766 if (role == ROLE_TARGET)
2767 transinfo = &tinfo->user;
2768 else
2769 transinfo = &tinfo->goal;
2770 *ppr_options &= (transinfo->ppr_options|MSG_EXT_PPR_PCOMP_EN);
2771 if (transinfo->width == MSG_EXT_WDTR_BUS_8_BIT) {
2772 maxsync = MAX(maxsync, AHD_SYNCRATE_ULTRA2);
2773 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
2774 }
2775 if (transinfo->period == 0) {
2776 *period = 0;
2777 *ppr_options = 0;
2778 } else {
2779 *period = MAX(*period, transinfo->period);
2780 ahd_find_syncrate(ahd, period, ppr_options, maxsync);
2781 }
2782 }
2783
2784 /*
2785 * Look up the valid period to SCSIRATE conversion in our table.
2786 * Return the period and offset that should be sent to the target
2787 * if this was the beginning of an SDTR.
2788 */
2789 void
2790 ahd_find_syncrate(struct ahd_softc *ahd, u_int *period,
2791 u_int *ppr_options, u_int maxsync)
2792 {
2793 if (*period < maxsync)
2794 *period = maxsync;
2795
2796 if ((*ppr_options & MSG_EXT_PPR_DT_REQ) != 0
2797 && *period > AHD_SYNCRATE_MIN_DT)
2798 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
2799
2800 if (*period > AHD_SYNCRATE_MIN)
2801 *period = 0;
2802
2803 /* Honor PPR option conformance rules. */
2804 if (*period > AHD_SYNCRATE_PACED)
2805 *ppr_options &= ~MSG_EXT_PPR_RTI;
2806
2807 if ((*ppr_options & MSG_EXT_PPR_IU_REQ) == 0)
2808 *ppr_options &= (MSG_EXT_PPR_DT_REQ|MSG_EXT_PPR_QAS_REQ);
2809
2810 if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0)
2811 *ppr_options &= MSG_EXT_PPR_QAS_REQ;
2812
2813 /* Skip all PACED only entries if IU is not available */
2814 if ((*ppr_options & MSG_EXT_PPR_IU_REQ) == 0
2815 && *period < AHD_SYNCRATE_DT)
2816 *period = AHD_SYNCRATE_DT;
2817
2818 /* Skip all DT only entries if DT is not available */
2819 if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0
2820 && *period < AHD_SYNCRATE_ULTRA2)
2821 *period = AHD_SYNCRATE_ULTRA2;
2822 }
2823
2824 /*
2825 * Truncate the given synchronous offset to a value the
2826 * current adapter type and syncrate are capable of.
2827 */
2828 void
2829 ahd_validate_offset(struct ahd_softc *ahd,
2830 struct ahd_initiator_tinfo *tinfo,
2831 u_int period, u_int *offset, int wide,
2832 role_t role)
2833 {
2834 u_int maxoffset;
2835
2836 /* Limit offset to what we can do */
2837 if (period == 0)
2838 maxoffset = 0;
2839 else if (period <= AHD_SYNCRATE_PACED) {
2840 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
2841 maxoffset = MAX_OFFSET_PACED_BUG;
2842 else
2843 maxoffset = MAX_OFFSET_PACED;
2844 } else
2845 maxoffset = MAX_OFFSET_NON_PACED;
2846 *offset = MIN(*offset, maxoffset);
2847 if (tinfo != NULL) {
2848 if (role == ROLE_TARGET)
2849 *offset = MIN(*offset, tinfo->user.offset);
2850 else
2851 *offset = MIN(*offset, tinfo->goal.offset);
2852 }
2853 }
2854
2855 /*
2856 * Truncate the given transfer width parameter to a value the
2857 * current adapter type is capable of.
2858 */
2859 void
2860 ahd_validate_width(struct ahd_softc *ahd, struct ahd_initiator_tinfo *tinfo,
2861 u_int *bus_width, role_t role)
2862 {
2863 switch (*bus_width) {
2864 default:
2865 if (ahd->features & AHD_WIDE) {
2866 /* Respond Wide */
2867 *bus_width = MSG_EXT_WDTR_BUS_16_BIT;
2868 break;
2869 }
2870 /* FALLTHROUGH */
2871 case MSG_EXT_WDTR_BUS_8_BIT:
2872 *bus_width = MSG_EXT_WDTR_BUS_8_BIT;
2873 break;
2874 }
2875 if (tinfo != NULL) {
2876 if (role == ROLE_TARGET)
2877 *bus_width = MIN(tinfo->user.width, *bus_width);
2878 else
2879 *bus_width = MIN(tinfo->goal.width, *bus_width);
2880 }
2881 }
2882
2883 /*
2884 * Update the bitmask of targets for which the controller should
2885 * negotiate with at the next convenient oportunity. This currently
2886 * means the next time we send the initial identify messages for
2887 * a new transaction.
2888 */
2889 int
2890 ahd_update_neg_request(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
2891 struct ahd_tmode_tstate *tstate,
2892 struct ahd_initiator_tinfo *tinfo, ahd_neg_type neg_type)
2893 {
2894 u_int auto_negotiate_orig;
2895
2896 auto_negotiate_orig = tstate->auto_negotiate;
2897 if (neg_type == AHD_NEG_ALWAYS) {
2898 /*
2899 * Force our "current" settings to be
2900 * unknown so that unless a bus reset
2901 * occurs the need to renegotiate is
2902 * recorded persistently.
2903 */
2904 if ((ahd->features & AHD_WIDE) != 0)
2905 tinfo->curr.width = AHD_WIDTH_UNKNOWN;
2906 tinfo->curr.period = AHD_PERIOD_UNKNOWN;
2907 tinfo->curr.offset = AHD_OFFSET_UNKNOWN;
2908 }
2909 if (tinfo->curr.period != tinfo->goal.period
2910 || tinfo->curr.width != tinfo->goal.width
2911 || tinfo->curr.offset != tinfo->goal.offset
2912 || tinfo->curr.ppr_options != tinfo->goal.ppr_options
2913 || (neg_type == AHD_NEG_IF_NON_ASYNC
2914 && (tinfo->goal.offset != 0
2915 || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT
2916 || tinfo->goal.ppr_options != 0)))
2917 tstate->auto_negotiate |= devinfo->target_mask;
2918 else
2919 tstate->auto_negotiate &= ~devinfo->target_mask;
2920
2921 return (auto_negotiate_orig != tstate->auto_negotiate);
2922 }
2923
2924 /*
2925 * Update the user/goal/curr tables of synchronous negotiation
2926 * parameters as well as, in the case of a current or active update,
2927 * any data structures on the host controller. In the case of an
2928 * active update, the specified target is currently talking to us on
2929 * the bus, so the transfer parameter update must take effect
2930 * immediately.
2931 */
2932 void
2933 ahd_set_syncrate(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
2934 u_int period, u_int offset, u_int ppr_options,
2935 u_int type, int paused)
2936 {
2937 struct ahd_initiator_tinfo *tinfo;
2938 struct ahd_tmode_tstate *tstate;
2939 u_int old_period;
2940 u_int old_offset;
2941 u_int old_ppr;
2942 int active;
2943 int update_needed;
2944
2945 active = (type & AHD_TRANS_ACTIVE) == AHD_TRANS_ACTIVE;
2946 update_needed = 0;
2947
2948 if (period == 0 || offset == 0) {
2949 period = 0;
2950 offset = 0;
2951 }
2952
2953 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel, devinfo->our_scsiid,
2954 devinfo->target, &tstate);
2955
2956 if ((type & AHD_TRANS_USER) != 0) {
2957 tinfo->user.period = period;
2958 tinfo->user.offset = offset;
2959 tinfo->user.ppr_options = ppr_options;
2960 }
2961
2962 if ((type & AHD_TRANS_GOAL) != 0) {
2963 tinfo->goal.period = period;
2964 tinfo->goal.offset = offset;
2965 tinfo->goal.ppr_options = ppr_options;
2966 }
2967
2968 old_period = tinfo->curr.period;
2969 old_offset = tinfo->curr.offset;
2970 old_ppr = tinfo->curr.ppr_options;
2971
2972 if ((type & AHD_TRANS_CUR) != 0
2973 && (old_period != period
2974 || old_offset != offset
2975 || old_ppr != ppr_options)) {
2976
2977 update_needed++;
2978
2979 tinfo->curr.period = period;
2980 tinfo->curr.offset = offset;
2981 tinfo->curr.ppr_options = ppr_options;
2982
2983 ahd_send_async(ahd, devinfo->channel, devinfo->target,
2984 CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
2985 if (bootverbose) {
2986 if (offset != 0) {
2987 int options;
2988
2989 printf("%s: target %d synchronous with "
2990 "period = 0x%x, offset = 0x%x",
2991 ahd_name(ahd), devinfo->target,
2992 period, offset);
2993 options = 0;
2994 if ((ppr_options & MSG_EXT_PPR_RD_STRM) != 0) {
2995 printf("(RDSTRM");
2996 options++;
2997 }
2998 if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
2999 printf("%s", options ? "|DT" : "(DT");
3000 options++;
3001 }
3002 if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
3003 printf("%s", options ? "|IU" : "(IU");
3004 options++;
3005 }
3006 if ((ppr_options & MSG_EXT_PPR_RTI) != 0) {
3007 printf("%s", options ? "|RTI" : "(RTI");
3008 options++;
3009 }
3010 if ((ppr_options & MSG_EXT_PPR_QAS_REQ) != 0) {
3011 printf("%s", options ? "|QAS" : "(QAS");
3012 options++;
3013 }
3014 if (options != 0)
3015 printf(")\n");
3016 else
3017 printf("\n");
3018 } else {
3019 printf("%s: target %d using "
3020 "asynchronous transfers%s\n",
3021 ahd_name(ahd), devinfo->target,
3022 (ppr_options & MSG_EXT_PPR_QAS_REQ) != 0
3023 ? "(QAS)" : "");
3024 }
3025 }
3026 }
3027 /*
3028 * Always refresh the neg-table to handle the case of the
3029 * sequencer setting the ENATNO bit for a MK_MESSAGE request.
3030 * We will always renegotiate in that case if this is a
3031 * packetized request. Also manage the busfree expected flag
3032 * from this common routine so that we catch changes due to
3033 * WDTR or SDTR messages.
3034 */
3035 if ((type & AHD_TRANS_CUR) != 0) {
3036 if (!paused)
3037 ahd_pause(ahd);
3038 ahd_update_neg_table(ahd, devinfo, &tinfo->curr);
3039 if (!paused)
3040 ahd_unpause(ahd);
3041 if (ahd->msg_type != MSG_TYPE_NONE) {
3042 if ((old_ppr & MSG_EXT_PPR_IU_REQ)
3043 != (ppr_options & MSG_EXT_PPR_IU_REQ)) {
3044 #ifdef AHD_DEBUG
3045 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) {
3046 ahd_print_devinfo(ahd, devinfo);
3047 printf("Expecting IU Change busfree\n");
3048 }
3049 #endif
3050 ahd->msg_flags |= MSG_FLAG_EXPECT_PPR_BUSFREE
3051 | MSG_FLAG_IU_REQ_CHANGED;
3052 }
3053 if ((old_ppr & MSG_EXT_PPR_IU_REQ) != 0) {
3054 #ifdef AHD_DEBUG
3055 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
3056 printf("PPR with IU_REQ outstanding\n");
3057 #endif
3058 ahd->msg_flags |= MSG_FLAG_EXPECT_PPR_BUSFREE;
3059 }
3060 }
3061 }
3062
3063 update_needed += ahd_update_neg_request(ahd, devinfo, tstate,
3064 tinfo, AHD_NEG_TO_GOAL);
3065
3066 if (update_needed && active)
3067 ahd_update_pending_scbs(ahd);
3068 }
3069
3070 /*
3071 * Update the user/goal/curr tables of wide negotiation
3072 * parameters as well as, in the case of a current or active update,
3073 * any data structures on the host controller. In the case of an
3074 * active update, the specified target is currently talking to us on
3075 * the bus, so the transfer parameter update must take effect
3076 * immediately.
3077 */
3078 void
3079 ahd_set_width(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
3080 u_int width, u_int type, int paused)
3081 {
3082 struct ahd_initiator_tinfo *tinfo;
3083 struct ahd_tmode_tstate *tstate;
3084 u_int oldwidth;
3085 int active;
3086 int update_needed;
3087
3088 active = (type & AHD_TRANS_ACTIVE) == AHD_TRANS_ACTIVE;
3089 update_needed = 0;
3090 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel, devinfo->our_scsiid,
3091 devinfo->target, &tstate);
3092
3093 if ((type & AHD_TRANS_USER) != 0)
3094 tinfo->user.width = width;
3095
3096 if ((type & AHD_TRANS_GOAL) != 0)
3097 tinfo->goal.width = width;
3098
3099 oldwidth = tinfo->curr.width;
3100 if ((type & AHD_TRANS_CUR) != 0 && oldwidth != width) {
3101
3102 update_needed++;
3103
3104 tinfo->curr.width = width;
3105 ahd_send_async(ahd, devinfo->channel, devinfo->target,
3106 CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
3107 if (bootverbose) {
3108 printf("%s: target %d using %dbit transfers\n",
3109 ahd_name(ahd), devinfo->target,
3110 8 * (0x01 << width));
3111 }
3112 }
3113
3114 if ((type & AHD_TRANS_CUR) != 0) {
3115 if (!paused)
3116 ahd_pause(ahd);
3117 ahd_update_neg_table(ahd, devinfo, &tinfo->curr);
3118 if (!paused)
3119 ahd_unpause(ahd);
3120 }
3121
3122 update_needed += ahd_update_neg_request(ahd, devinfo, tstate,
3123 tinfo, AHD_NEG_TO_GOAL);
3124 if (update_needed && active)
3125 ahd_update_pending_scbs(ahd);
3126
3127 }
3128
3129 /*
3130 * Update the current state of tagged queuing for a given target.
3131 */
3132 void
3133 ahd_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
3134 ahd_queue_alg alg)
3135 {
3136 ahd_platform_set_tags(ahd, devinfo, alg);
3137 ahd_send_async(ahd, devinfo->channel, devinfo->target,
3138 devinfo->lun, AC_TRANSFER_NEG, &alg);
3139 }
3140
3141 static void
3142 ahd_update_neg_table(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
3143 struct ahd_transinfo *tinfo)
3144 {
3145 ahd_mode_state saved_modes;
3146 u_int period;
3147 u_int ppr_opts;
3148 u_int con_opts;
3149 u_int offset;
3150 u_int saved_negoaddr;
3151 uint8_t iocell_opts[sizeof(ahd->iocell_opts)];
3152
3153 saved_modes = ahd_save_modes(ahd);
3154 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
3155
3156 saved_negoaddr = ahd_inb(ahd, NEGOADDR);
3157 ahd_outb(ahd, NEGOADDR, devinfo->target);
3158 period = tinfo->period;
3159 offset = tinfo->offset;
3160 memcpy(iocell_opts, ahd->iocell_opts, sizeof(ahd->iocell_opts));
3161 ppr_opts = tinfo->ppr_options & (MSG_EXT_PPR_QAS_REQ|MSG_EXT_PPR_DT_REQ
3162 |MSG_EXT_PPR_IU_REQ|MSG_EXT_PPR_RTI);
3163 con_opts = 0;
3164 if (period == 0)
3165 period = AHD_SYNCRATE_ASYNC;
3166 if (period == AHD_SYNCRATE_160) {
3167
3168 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0) {
3169 /*
3170 * When the SPI4 spec was finalized, PACE transfers
3171 * was not made a configurable option in the PPR
3172 * message. Instead it is assumed to be enabled for
3173 * any syncrate faster than 80MHz. Nevertheless,
3174 * Harpoon2A4 allows this to be configurable.
3175 *
3176 * Harpoon2A4 also assumes at most 2 data bytes per
3177 * negotiated REQ/ACK offset. Paced transfers take
3178 * 4, so we must adjust our offset.
3179 */
3180 ppr_opts |= PPROPT_PACE;
3181 offset *= 2;
3182
3183 /*
3184 * Harpoon2A assumed that there would be a
3185 * fallback rate between 160MHz and 80Mhz,
3186 * so 7 is used as the period factor rather
3187 * than 8 for 160MHz.
3188 */
3189 period = AHD_SYNCRATE_REVA_160;
3190 }
3191 if ((tinfo->ppr_options & MSG_EXT_PPR_PCOMP_EN) == 0)
3192 iocell_opts[AHD_PRECOMP_SLEW_INDEX] &=
3193 ~AHD_PRECOMP_MASK;
3194 } else {
3195 /*
3196 * Precomp should be disabled for non-paced transfers.
3197 */
3198 iocell_opts[AHD_PRECOMP_SLEW_INDEX] &= ~AHD_PRECOMP_MASK;
3199
3200 if ((ahd->features & AHD_NEW_IOCELL_OPTS) != 0
3201 && (ppr_opts & MSG_EXT_PPR_DT_REQ) != 0) {
3202 /*
3203 * Slow down our CRC interval to be
3204 * compatible with devices that can't
3205 * handle a CRC at full speed.
3206 */
3207 con_opts |= ENSLOWCRC;
3208 }
3209 }
3210
3211 ahd_outb(ahd, ANNEXCOL, AHD_ANNEXCOL_PRECOMP_SLEW);
3212 ahd_outb(ahd, ANNEXDAT, iocell_opts[AHD_PRECOMP_SLEW_INDEX]);
3213 ahd_outb(ahd, ANNEXCOL, AHD_ANNEXCOL_AMPLITUDE);
3214 ahd_outb(ahd, ANNEXDAT, iocell_opts[AHD_AMPLITUDE_INDEX]);
3215
3216 ahd_outb(ahd, NEGPERIOD, period);
3217 ahd_outb(ahd, NEGPPROPTS, ppr_opts);
3218 ahd_outb(ahd, NEGOFFSET, offset);
3219
3220 if (tinfo->width == MSG_EXT_WDTR_BUS_16_BIT)
3221 con_opts |= WIDEXFER;
3222
3223 /*
3224 * During packetized transfers, the target will
3225 * give us the oportunity to send command packets
3226 * without us asserting attention.
3227 */
3228 if ((tinfo->ppr_options & MSG_EXT_PPR_IU_REQ) == 0)
3229 con_opts |= ENAUTOATNO;
3230 ahd_outb(ahd, NEGCONOPTS, con_opts);
3231 ahd_outb(ahd, NEGOADDR, saved_negoaddr);
3232 ahd_restore_modes(ahd, saved_modes);
3233 }
3234
3235 /*
3236 * When the transfer settings for a connection change, setup for
3237 * negotiation in pending SCBs to effect the change as quickly as
3238 * possible. We also cancel any negotiations that are scheduled
3239 * for inflight SCBs that have not been started yet.
3240 */
3241 static void
3242 ahd_update_pending_scbs(struct ahd_softc *ahd)
3243 {
3244 struct scb *pending_scb;
3245 int pending_scb_count;
3246 u_int scb_tag;
3247 int paused;
3248 u_int saved_scbptr;
3249 ahd_mode_state saved_modes;
3250
3251 /*
3252 * Traverse the pending SCB list and ensure that all of the
3253 * SCBs there have the proper settings. We can only safely
3254 * clear the negotiation required flag (setting requires the
3255 * execution queue to be modified) and this is only possible
3256 * if we are not already attempting to select out for this
3257 * SCB. For this reason, all callers only call this routine
3258 * if we are changing the negotiation settings for the currently
3259 * active transaction on the bus.
3260 */
3261 pending_scb_count = 0;
3262 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
3263 struct ahd_devinfo devinfo;
3264 struct hardware_scb *pending_hscb;
3265 struct ahd_initiator_tinfo *tinfo;
3266 struct ahd_tmode_tstate *tstate;
3267
3268 ahd_scb_devinfo(ahd, &devinfo, pending_scb);
3269 tinfo = ahd_fetch_transinfo(ahd, devinfo.channel,
3270 devinfo.our_scsiid,
3271 devinfo.target, &tstate);
3272 pending_hscb = pending_scb->hscb;
3273 if ((tstate->auto_negotiate & devinfo.target_mask) == 0
3274 && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) {
3275 pending_scb->flags &= ~SCB_AUTO_NEGOTIATE;
3276 pending_hscb->control &= ~MK_MESSAGE;
3277 }
3278 ahd_sync_scb(ahd, pending_scb,
3279 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
3280 pending_scb_count++;
3281 }
3282
3283 if (pending_scb_count == 0)
3284 return;
3285
3286 if (ahd_is_paused(ahd)) {
3287 paused = 1;
3288 } else {
3289 paused = 0;
3290 ahd_pause(ahd);
3291 }
3292
3293 /*
3294 * Force the sequencer to reinitialize the selection for
3295 * the command at the head of the execution queue if it
3296 * has already been setup. The negotiation changes may
3297 * effect whether we select-out with ATN.
3298 */
3299 saved_modes = ahd_save_modes(ahd);
3300 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
3301 ahd_outb(ahd, SCSISEQ0, ahd_inb(ahd, SCSISEQ0) & ~ENSELO);
3302 saved_scbptr = ahd_get_scbptr(ahd);
3303 /* Ensure that the hscbs down on the card match the new information */
3304 for (scb_tag = 0; scb_tag < ahd->scb_data.maxhscbs; scb_tag++) {
3305 struct hardware_scb *pending_hscb;
3306 u_int control;
3307
3308 pending_scb = ahd_lookup_scb(ahd, scb_tag);
3309 if (pending_scb == NULL)
3310 continue;
3311 ahd_set_scbptr(ahd, scb_tag);
3312 pending_hscb = pending_scb->hscb;
3313 control = ahd_inb_scbram(ahd, SCB_CONTROL);
3314 control &= ~MK_MESSAGE;
3315 control |= pending_hscb->control & MK_MESSAGE;
3316 ahd_outb(ahd, SCB_CONTROL, control);
3317 }
3318 ahd_set_scbptr(ahd, saved_scbptr);
3319 ahd_restore_modes(ahd, saved_modes);
3320
3321 if (paused == 0)
3322 ahd_unpause(ahd);
3323 }
3324
3325 /**************************** Pathing Information *****************************/
3326 static void
3327 ahd_fetch_devinfo(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
3328 {
3329 ahd_mode_state saved_modes;
3330 u_int saved_scsiid;
3331 role_t role;
3332 int our_id;
3333
3334 saved_modes = ahd_save_modes(ahd);
3335 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
3336
3337 if (ahd_inb(ahd, SSTAT0) & TARGET)
3338 role = ROLE_TARGET;
3339 else
3340 role = ROLE_INITIATOR;
3341
3342 if (role == ROLE_TARGET
3343 && (ahd_inb(ahd, SEQ_FLAGS) & CMDPHASE_PENDING) != 0) {
3344 /* We were selected, so pull our id from TARGIDIN */
3345 our_id = ahd_inb(ahd, TARGIDIN) & OID;
3346 } else if (role == ROLE_TARGET)
3347 our_id = ahd_inb(ahd, TOWNID);
3348 else
3349 our_id = ahd_inb(ahd, IOWNID);
3350
3351 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
3352 ahd_compile_devinfo(devinfo,
3353 our_id,
3354 SCSIID_TARGET(ahd, saved_scsiid),
3355 ahd_inb(ahd, SAVED_LUN),
3356 SCSIID_CHANNEL(ahd, saved_scsiid),
3357 role);
3358 ahd_restore_modes(ahd, saved_modes);
3359 }
3360
3361 void
3362 ahd_print_devinfo(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
3363 {
3364 printf("%s:%c:%d:%d: ", ahd_name(ahd), 'A',
3365 devinfo->target, devinfo->lun);
3366 }
3367
3368 struct ahd_phase_table_entry*
3369 ahd_lookup_phase_entry(int phase)
3370 {
3371 struct ahd_phase_table_entry *entry;
3372 struct ahd_phase_table_entry *last_entry;
3373
3374 /*
3375 * num_phases doesn't include the default entry which
3376 * will be returned if the phase doesn't match.
3377 */
3378 last_entry = &ahd_phase_table[num_phases];
3379 for (entry = ahd_phase_table; entry < last_entry; entry++) {
3380 if (phase == entry->phase)
3381 break;
3382 }
3383 return (entry);
3384 }
3385
3386 void
3387 ahd_compile_devinfo(struct ahd_devinfo *devinfo, u_int our_id, u_int target,
3388 u_int lun, char channel, role_t role)
3389 {
3390 devinfo->our_scsiid = our_id;
3391 devinfo->target = target;
3392 devinfo->lun = lun;
3393 devinfo->target_offset = target;
3394 devinfo->channel = channel;
3395 devinfo->role = role;
3396 if (channel == 'B')
3397 devinfo->target_offset += 8;
3398 devinfo->target_mask = (0x01 << devinfo->target_offset);
3399 }
3400
3401 static void
3402 ahd_scb_devinfo(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
3403 struct scb *scb)
3404 {
3405 role_t role;
3406 int our_id;
3407
3408 our_id = SCSIID_OUR_ID(scb->hscb->scsiid);
3409 role = ROLE_INITIATOR;
3410 if ((scb->hscb->control & TARGET_SCB) != 0)
3411 role = ROLE_TARGET;
3412 ahd_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahd, scb),
3413 SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahd, scb), role);
3414 }
3415
3416
3417 /************************ Message Phase Processing ****************************/
3418 /*
3419 * When an initiator transaction with the MK_MESSAGE flag either reconnects
3420 * or enters the initial message out phase, we are interrupted. Fill our
3421 * outgoing message buffer with the appropriate message and beging handing
3422 * the message phase(s) manually.
3423 */
3424 static void
3425 ahd_setup_initiator_msgout(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
3426 struct scb *scb)
3427 {
3428 /*
3429 * To facilitate adding multiple messages together,
3430 * each routine should increment the index and len
3431 * variables instead of setting them explicitly.
3432 */
3433 ahd->msgout_index = 0;
3434 ahd->msgout_len = 0;
3435
3436 if (ahd_currently_packetized(ahd))
3437 ahd->msg_flags |= MSG_FLAG_PACKETIZED;
3438
3439 if (ahd->send_msg_perror
3440 && ahd_inb(ahd, MSG_OUT) == HOST_MSG) {
3441 ahd->msgout_buf[ahd->msgout_index++] = ahd->send_msg_perror;
3442 ahd->msgout_len++;
3443 ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
3444 #ifdef AHD_DEBUG
3445 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
3446 printf("Setting up for Parity Error delivery\n");
3447 #endif
3448 return;
3449 } else if (scb == NULL) {
3450 printf("%s: WARNING. No pending message for "
3451 "I_T msgin. Issuing NO-OP\n", ahd_name(ahd));
3452 ahd->msgout_buf[ahd->msgout_index++] = MSG_NOOP;
3453 ahd->msgout_len++;
3454 ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
3455 return;
3456 }
3457
3458 if ((scb->flags & SCB_DEVICE_RESET) == 0
3459 && (scb->flags & SCB_PACKETIZED) == 0
3460 && ahd_inb(ahd, MSG_OUT) == MSG_IDENTIFYFLAG) {
3461 u_int identify_msg;
3462
3463 identify_msg = MSG_IDENTIFYFLAG | SCB_GET_LUN(scb);
3464 if ((scb->hscb->control & DISCENB) != 0)
3465 identify_msg |= MSG_IDENTIFY_DISCFLAG;
3466 ahd->msgout_buf[ahd->msgout_index++] = identify_msg;
3467 ahd->msgout_len++;
3468
3469 if ((scb->hscb->control & TAG_ENB) != 0) {
3470 ahd->msgout_buf[ahd->msgout_index++] =
3471 scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE);
3472 ahd->msgout_buf[ahd->msgout_index++] = SCB_GET_TAG(scb);
3473 ahd->msgout_len += 2;
3474 }
3475 }
3476
3477 if (scb->flags & SCB_DEVICE_RESET) {
3478 ahd->msgout_buf[ahd->msgout_index++] = MSG_BUS_DEV_RESET;
3479 ahd->msgout_len++;
3480 ahd_print_path(ahd, scb);
3481 printf("Bus Device Reset Message Sent\n");
3482 /*
3483 * Clear our selection hardware in advance of
3484 * the busfree. We may have an entry in the waiting
3485 * Q for this target, and we don't want to go about
3486 * selecting while we handle the busfree and blow it
3487 * away.
3488 */
3489 ahd_outb(ahd, SCSISEQ0, 0);
3490 } else if ((scb->flags & SCB_ABORT) != 0) {
3491
3492 if ((scb->hscb->control & TAG_ENB) != 0) {
3493 ahd->msgout_buf[ahd->msgout_index++] = MSG_ABORT_TAG;
3494 } else {
3495 ahd->msgout_buf[ahd->msgout_index++] = MSG_ABORT;
3496 }
3497 ahd->msgout_len++;
3498 ahd_print_path(ahd, scb);
3499 printf("Abort%s Message Sent\n",
3500 (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : "");
3501 /*
3502 * Clear our selection hardware in advance of
3503 * the busfree. We may have an entry in the waiting
3504 * Q for this target, and we don't want to go about
3505 * selecting while we handle the busfree and blow it
3506 * away.
3507 */
3508 ahd_outb(ahd, SCSISEQ0, 0);
3509 } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) {
3510 ahd_build_transfer_msg(ahd, devinfo);
3511 /*
3512 * Clear our selection hardware in advance of potential
3513 * PPR IU status change busfree. We may have an entry in
3514 * the waiting Q for this target, and we don't want to go
3515 * about selecting while we handle the busfree and blow
3516 * it away.
3517 */
3518 ahd_outb(ahd, SCSISEQ0, 0);
3519 } else {
3520 printf("ahd_intr: AWAITING_MSG for an SCB that "
3521 "does not have a waiting message\n");
3522 printf("SCSIID = %x, target_mask = %x\n", scb->hscb->scsiid,
3523 devinfo->target_mask);
3524 panic("SCB = %d, SCB Control = %x:%x, MSG_OUT = %x "
3525 "SCB flags = %x", SCB_GET_TAG(scb), scb->hscb->control,
3526 ahd_inb_scbram(ahd, SCB_CONTROL), ahd_inb(ahd, MSG_OUT),
3527 scb->flags);
3528 }
3529
3530 /*
3531 * Clear the MK_MESSAGE flag from the SCB so we aren't
3532 * asked to send this message again.
3533 */
3534 ahd_outb(ahd, SCB_CONTROL,
3535 ahd_inb_scbram(ahd, SCB_CONTROL) & ~MK_MESSAGE);
3536 scb->hscb->control &= ~MK_MESSAGE;
3537 ahd->msgout_index = 0;
3538 ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
3539 }
3540
3541 /*
3542 * Build an appropriate transfer negotiation message for the
3543 * currently active target.
3544 */
3545 static void
3546 ahd_build_transfer_msg(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
3547 {
3548 /*
3549 * We need to initiate transfer negotiations.
3550 * If our current and goal settings are identical,
3551 * we want to renegotiate due to a check condition.
3552 */
3553 struct ahd_initiator_tinfo *tinfo;
3554 struct ahd_tmode_tstate *tstate;
3555 int dowide;
3556 int dosync;
3557 int doppr;
3558 u_int period;
3559 u_int ppr_options;
3560 u_int offset;
3561
3562 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel, devinfo->our_scsiid,
3563 devinfo->target, &tstate);
3564 /*
3565 * Filter our period based on the current connection.
3566 * If we can't perform DT transfers on this segment (not in LVD
3567 * mode for instance), then our decision to issue a PPR message
3568 * may change.
3569 */
3570 period = tinfo->goal.period;
3571 offset = tinfo->goal.offset;
3572 ppr_options = tinfo->goal.ppr_options;
3573 /* Target initiated PPR is not allowed in the SCSI spec */
3574 if (devinfo->role == ROLE_TARGET)
3575 ppr_options = 0;
3576 ahd_devlimited_syncrate(ahd, tinfo, &period,
3577 &ppr_options, devinfo->role);
3578 dowide = tinfo->curr.width != tinfo->goal.width;
3579 dosync = tinfo->curr.offset != offset || tinfo->curr.period != period;
3580 /*
3581 * Only use PPR if we have options that need it, even if the device
3582 * claims to support it. There might be an expander in the way
3583 * that doesn't.
3584 */
3585 doppr = ppr_options != 0;
3586
3587 if (!dowide && !dosync && !doppr) {
3588 dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT;
3589 dosync = tinfo->goal.offset != 0;
3590 }
3591
3592 if (!dowide && !dosync && !doppr) {
3593 /*
3594 * Force async with a WDTR message if we have a wide bus,
3595 * or just issue an SDTR with a 0 offset.
3596 */
3597 if ((ahd->features & AHD_WIDE) != 0)
3598 dowide = 1;
3599 else
3600 dosync = 1;
3601
3602 if (bootverbose) {
3603 ahd_print_devinfo(ahd, devinfo);
3604 printf("Ensuring async\n");
3605 }
3606 }
3607 /* Target initiated PPR is not allowed in the SCSI spec */
3608 if (devinfo->role == ROLE_TARGET)
3609 doppr = 0;
3610
3611 /*
3612 * Both the PPR message and SDTR message require the
3613 * goal syncrate to be limited to what the target device
3614 * is capable of handling (based on whether an LVD->SE
3615 * expander is on the bus), so combine these two cases.
3616 * Regardless, guarantee that if we are using WDTR and SDTR
3617 * messages that WDTR comes first.
3618 */
3619 if (doppr || (dosync && !dowide)) {
3620
3621 offset = tinfo->goal.offset;
3622 ahd_validate_offset(ahd, tinfo, period, &offset,
3623 doppr ? tinfo->goal.width
3624 : tinfo->curr.width,
3625 devinfo->role);
3626 if (doppr) {
3627 ahd_construct_ppr(ahd, devinfo, period, offset,
3628 tinfo->goal.width, ppr_options);
3629 } else {
3630 ahd_construct_sdtr(ahd, devinfo, period, offset);
3631 }
3632 } else {
3633 ahd_construct_wdtr(ahd, devinfo, tinfo->goal.width);
3634 }
3635 }
3636
3637 /*
3638 * Build a synchronous negotiation message in our message
3639 * buffer based on the input parameters.
3640 */
3641 static void
3642 ahd_construct_sdtr(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
3643 u_int period, u_int offset)
3644 {
3645 if (offset == 0)
3646 period = AHD_ASYNC_XFER_PERIOD;
3647 ahd->msgout_buf[ahd->msgout_index++] = MSG_EXTENDED;
3648 ahd->msgout_buf[ahd->msgout_index++] = MSG_EXT_SDTR_LEN;
3649 ahd->msgout_buf[ahd->msgout_index++] = MSG_EXT_SDTR;
3650 ahd->msgout_buf[ahd->msgout_index++] = period;
3651 ahd->msgout_buf[ahd->msgout_index++] = offset;
3652 ahd->msgout_len += 5;
3653 if (bootverbose) {
3654 printf("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n",
3655 ahd_name(ahd), devinfo->channel, devinfo->target,
3656 devinfo->lun, period, offset);
3657 }
3658 }
3659
3660 /*
3661 * Build a wide negotiateion message in our message
3662 * buffer based on the input parameters.
3663 */
3664 static void
3665 ahd_construct_wdtr(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
3666 u_int bus_width)
3667 {
3668 ahd->msgout_buf[ahd->msgout_index++] = MSG_EXTENDED;
3669 ahd->msgout_buf[ahd->msgout_index++] = MSG_EXT_WDTR_LEN;
3670 ahd->msgout_buf[ahd->msgout_index++] = MSG_EXT_WDTR;
3671 ahd->msgout_buf[ahd->msgout_index++] = bus_width;
3672 ahd->msgout_len += 4;
3673 if (bootverbose) {
3674 printf("(%s:%c:%d:%d): Sending WDTR %x\n",
3675 ahd_name(ahd), devinfo->channel, devinfo->target,
3676 devinfo->lun, bus_width);
3677 }
3678 }
3679
3680 /*
3681 * Build a parallel protocol request message in our message
3682 * buffer based on the input parameters.
3683 */
3684 static void
3685 ahd_construct_ppr(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
3686 u_int period, u_int offset, u_int bus_width,
3687 u_int ppr_options)
3688 {
3689 /*
3690 * Always request precompensation from
3691 * the other target if we are running
3692 * at paced syncrates.
3693 */
3694 if (period <= AHD_SYNCRATE_PACED)
3695 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
3696 if (offset == 0)
3697 period = AHD_ASYNC_XFER_PERIOD;
3698 ahd->msgout_buf[ahd->msgout_index++] = MSG_EXTENDED;
3699 ahd->msgout_buf[ahd->msgout_index++] = MSG_EXT_PPR_LEN;
3700 ahd->msgout_buf[ahd->msgout_index++] = MSG_EXT_PPR;
3701 ahd->msgout_buf[ahd->msgout_index++] = period;
3702 ahd->msgout_buf[ahd->msgout_index++] = 0;
3703 ahd->msgout_buf[ahd->msgout_index++] = offset;
3704 ahd->msgout_buf[ahd->msgout_index++] = bus_width;
3705 ahd->msgout_buf[ahd->msgout_index++] = ppr_options;
3706 ahd->msgout_len += 8;
3707 if (bootverbose) {
3708 printf("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, "
3709 "offset %x, ppr_options %x\n", ahd_name(ahd),
3710 devinfo->channel, devinfo->target, devinfo->lun,
3711 bus_width, period, offset, ppr_options);
3712 }
3713 }
3714
3715 /*
3716 * Clear any active message state.
3717 */
3718 static void
3719 ahd_clear_msg_state(struct ahd_softc *ahd)
3720 {
3721 ahd_mode_state saved_modes;
3722
3723 saved_modes = ahd_save_modes(ahd);
3724 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
3725 ahd->send_msg_perror = 0;
3726 ahd->msg_flags = MSG_FLAG_NONE;
3727 ahd->msgout_len = 0;
3728 ahd->msgin_index = 0;
3729 ahd->msg_type = MSG_TYPE_NONE;
3730 if ((ahd_inb(ahd, SCSISIGO) & ATNO) != 0) {
3731 /*
3732 * The target didn't care to respond to our
3733 * message request, so clear ATN.
3734 */
3735 ahd_outb(ahd, CLRSINT1, CLRATNO);
3736 }
3737 ahd_outb(ahd, MSG_OUT, MSG_NOOP);
3738 ahd_outb(ahd, SEQ_FLAGS2,
3739 ahd_inb(ahd, SEQ_FLAGS2) & ~TARGET_MSG_PENDING);
3740 ahd_restore_modes(ahd, saved_modes);
3741 }
3742
3743 /*
3744 * Manual message loop handler.
3745 */
3746 static void
3747 ahd_handle_message_phase(struct ahd_softc *ahd)
3748 {
3749 struct ahd_devinfo devinfo;
3750 u_int bus_phase;
3751 int end_session;
3752
3753 ahd_fetch_devinfo(ahd, &devinfo);
3754 end_session = FALSE;
3755 bus_phase = ahd_inb(ahd, LASTPHASE);
3756
3757 if ((ahd_inb(ahd, LQISTAT2) & LQIPHASE_OUTPKT) != 0) {
3758 printf("LQIRETRY for LQIPHASE_OUTPKT\n");
3759 ahd_outb(ahd, LQCTL2, LQIRETRY);
3760 }
3761 reswitch:
3762 switch (ahd->msg_type) {
3763 case MSG_TYPE_INITIATOR_MSGOUT:
3764 {
3765 int lastbyte;
3766 int phasemis;
3767 int msgdone;
3768
3769 if (ahd->msgout_len == 0 && ahd->send_msg_perror == 0)
3770 panic("HOST_MSG_LOOP interrupt with no active message");
3771
3772 #ifdef AHD_DEBUG
3773 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) {
3774 ahd_print_devinfo(ahd, &devinfo);
3775 printf("INITIATOR_MSG_OUT");
3776 }
3777 #endif
3778 phasemis = bus_phase != P_MESGOUT;
3779 if (phasemis) {
3780 #ifdef AHD_DEBUG
3781 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) {
3782 printf(" PHASEMIS %s\n",
3783 ahd_lookup_phase_entry(bus_phase)
3784 ->phasemsg);
3785 }
3786 #endif
3787 if (bus_phase == P_MESGIN) {
3788 /*
3789 * Change gears and see if
3790 * this messages is of interest to
3791 * us or should be passed back to
3792 * the sequencer.
3793 */
3794 ahd_outb(ahd, CLRSINT1, CLRATNO);
3795 ahd->send_msg_perror = 0;
3796 ahd->msg_type = MSG_TYPE_INITIATOR_MSGIN;
3797 ahd->msgin_index = 0;
3798 goto reswitch;
3799 }
3800 end_session = TRUE;
3801 break;
3802 }
3803
3804 if (ahd->send_msg_perror) {
3805 ahd_outb(ahd, CLRSINT1, CLRATNO);
3806 ahd_outb(ahd, CLRSINT1, CLRREQINIT);
3807 #ifdef AHD_DEBUG
3808 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
3809 printf(" byte 0x%x\n", ahd->send_msg_perror);
3810 #endif
3811 /*
3812 * If we are notifying the target of a CRC error
3813 * during packetized operations, the target is
3814 * within its rights to acknowledge our message
3815 * with a busfree.
3816 */
3817 if ((ahd->msg_flags & MSG_FLAG_PACKETIZED) != 0
3818 && ahd->send_msg_perror == MSG_INITIATOR_DET_ERR)
3819 ahd->msg_flags |= MSG_FLAG_EXPECT_IDE_BUSFREE;
3820
3821 ahd_outb(ahd, RETURN_2, ahd->send_msg_perror);
3822 ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_WRITE);
3823 break;
3824 }
3825
3826 msgdone = ahd->msgout_index == ahd->msgout_len;
3827 if (msgdone) {
3828 /*
3829 * The target has requested a retry.
3830 * Re-assert ATN, reset our message index to
3831 * 0, and try again.
3832 */
3833 ahd->msgout_index = 0;
3834 ahd_assert_atn(ahd);
3835 }
3836
3837 lastbyte = ahd->msgout_index == (ahd->msgout_len - 1);
3838 if (lastbyte) {
3839 /* Last byte is signified by dropping ATN */
3840 ahd_outb(ahd, CLRSINT1, CLRATNO);
3841 }
3842
3843 /*
3844 * Clear our interrupt status and present
3845 * the next byte on the bus.
3846 */
3847 ahd_outb(ahd, CLRSINT1, CLRREQINIT);
3848 #ifdef AHD_DEBUG
3849 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
3850 printf(" byte 0x%x\n",
3851 ahd->msgout_buf[ahd->msgout_index]);
3852 #endif
3853 ahd_outb(ahd, RETURN_2, ahd->msgout_buf[ahd->msgout_index++]);
3854 ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_WRITE);
3855 break;
3856 }
3857 case MSG_TYPE_INITIATOR_MSGIN:
3858 {
3859 int phasemis;
3860 int message_done;
3861
3862 #ifdef AHD_DEBUG
3863 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) {
3864 ahd_print_devinfo(ahd, &devinfo);
3865 printf("INITIATOR_MSG_IN");
3866 }
3867 #endif
3868 phasemis = bus_phase != P_MESGIN;
3869 if (phasemis) {
3870 #ifdef AHD_DEBUG
3871 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) {
3872 printf(" PHASEMIS %s\n",
3873 ahd_lookup_phase_entry(bus_phase)
3874 ->phasemsg);
3875 }
3876 #endif
3877 ahd->msgin_index = 0;
3878 if (bus_phase == P_MESGOUT
3879 && (ahd->send_msg_perror != 0
3880 || (ahd->msgout_len != 0
3881 && ahd->msgout_index == 0))) {
3882 ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
3883 goto reswitch;
3884 }
3885 end_session = TRUE;
3886 break;
3887 }
3888
3889 /* Pull the byte in without acking it */
3890 ahd->msgin_buf[ahd->msgin_index] = ahd_inb(ahd, SCSIBUS);
3891 #ifdef AHD_DEBUG
3892 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
3893 printf(" byte 0x%x\n",
3894 ahd->msgin_buf[ahd->msgin_index]);
3895 #endif
3896
3897 message_done = ahd_parse_msg(ahd, &devinfo);
3898
3899 if (message_done) {
3900 /*
3901 * Clear our incoming message buffer in case there
3902 * is another message following this one.
3903 */
3904 ahd->msgin_index = 0;
3905
3906 /*
3907 * If this message illicited a response,
3908 * assert ATN so the target takes us to the
3909 * message out phase.
3910 */
3911 if (ahd->msgout_len != 0) {
3912 #ifdef AHD_DEBUG
3913 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) {
3914 ahd_print_devinfo(ahd, &devinfo);
3915 printf("Asserting ATN for response\n");
3916 }
3917 #endif
3918 ahd_assert_atn(ahd);
3919 }
3920 } else
3921 ahd->msgin_index++;
3922
3923 if (message_done == MSGLOOP_TERMINATED) {
3924 end_session = TRUE;
3925 } else {
3926 /* Ack the byte */
3927 ahd_outb(ahd, CLRSINT1, CLRREQINIT);
3928 ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_READ);
3929 }
3930 break;
3931 }
3932 case MSG_TYPE_TARGET_MSGIN:
3933 {
3934 int msgdone;
3935 int msgout_request;
3936
3937 /*
3938 * By default, the message loop will continue.
3939 */
3940 ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_TARG);
3941
3942 if (ahd->msgout_len == 0)
3943 panic("Target MSGIN with no active message");
3944
3945 /*
3946 * If we interrupted a mesgout session, the initiator
3947 * will not know this until our first REQ. So, we
3948 * only honor mesgout requests after we've sent our
3949 * first byte.
3950 */
3951 if ((ahd_inb(ahd, SCSISIGI) & ATNI) != 0
3952 && ahd->msgout_index > 0)
3953 msgout_request = TRUE;
3954 else
3955 msgout_request = FALSE;
3956
3957 if (msgout_request) {
3958
3959 /*
3960 * Change gears and see if
3961 * this messages is of interest to
3962 * us or should be passed back to
3963 * the sequencer.
3964 */
3965 ahd->msg_type = MSG_TYPE_TARGET_MSGOUT;
3966 ahd_outb(ahd, SCSISIGO, P_MESGOUT | BSYO);
3967 ahd->msgin_index = 0;
3968 /* Dummy read to REQ for first byte */
3969 ahd_inb(ahd, SCSIDAT);
3970 ahd_outb(ahd, SXFRCTL0,
3971 ahd_inb(ahd, SXFRCTL0) | SPIOEN);
3972 break;
3973 }
3974
3975 msgdone = ahd->msgout_index == ahd->msgout_len;
3976 if (msgdone) {
3977 ahd_outb(ahd, SXFRCTL0,
3978 ahd_inb(ahd, SXFRCTL0) & ~SPIOEN);
3979 end_session = TRUE;
3980 break;
3981 }
3982
3983 /*
3984 * Present the next byte on the bus.
3985 */
3986 ahd_outb(ahd, SXFRCTL0, ahd_inb(ahd, SXFRCTL0) | SPIOEN);
3987 ahd_outb(ahd, SCSIDAT, ahd->msgout_buf[ahd->msgout_index++]);
3988 break;
3989 }
3990 case MSG_TYPE_TARGET_MSGOUT:
3991 {
3992 int lastbyte;
3993 int msgdone;
3994
3995 /*
3996 * By default, the message loop will continue.
3997 */
3998 ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_TARG);
3999
4000 /*
4001 * The initiator signals that this is
4002 * the last byte by dropping ATN.
4003 */
4004 lastbyte = (ahd_inb(ahd, SCSISIGI) & ATNI) == 0;
4005
4006 /*
4007 * Read the latched byte, but turn off SPIOEN first
4008 * so that we don't inadvertently cause a REQ for the
4009 * next byte.
4010 */
4011 ahd_outb(ahd, SXFRCTL0, ahd_inb(ahd, SXFRCTL0) & ~SPIOEN);
4012 ahd->msgin_buf[ahd->msgin_index] = ahd_inb(ahd, SCSIDAT);
4013 msgdone = ahd_parse_msg(ahd, &devinfo);
4014 if (msgdone == MSGLOOP_TERMINATED) {
4015 /*
4016 * The message is *really* done in that it caused
4017 * us to go to bus free. The sequencer has already
4018 * been reset at this point, so pull the ejection
4019 * handle.
4020 */
4021 return;
4022 }
4023
4024 ahd->msgin_index++;
4025
4026 /*
4027 * XXX Read spec about initiator dropping ATN too soon
4028 * and use msgdone to detect it.
4029 */
4030 if (msgdone == MSGLOOP_MSGCOMPLETE) {
4031 ahd->msgin_index = 0;
4032
4033 /*
4034 * If this message illicited a response, transition
4035 * to the Message in phase and send it.
4036 */
4037 if (ahd->msgout_len != 0) {
4038 ahd_outb(ahd, SCSISIGO, P_MESGIN | BSYO);
4039 ahd_outb(ahd, SXFRCTL0,
4040 ahd_inb(ahd, SXFRCTL0) | SPIOEN);
4041 ahd->msg_type = MSG_TYPE_TARGET_MSGIN;
4042 ahd->msgin_index = 0;
4043 break;
4044 }
4045 }
4046
4047 if (lastbyte)
4048 end_session = TRUE;
4049 else {
4050 /* Ask for the next byte. */
4051 ahd_outb(ahd, SXFRCTL0,
4052 ahd_inb(ahd, SXFRCTL0) | SPIOEN);
4053 }
4054
4055 break;
4056 }
4057 default:
4058 panic("Unknown REQINIT message type");
4059 }
4060
4061 if (end_session) {
4062 if ((ahd->msg_flags & MSG_FLAG_PACKETIZED) != 0) {
4063 printf("%s: Returning to Idle Loop\n",
4064 ahd_name(ahd));
4065 ahd_clear_msg_state(ahd);
4066
4067 /*
4068 * Perform the equivalent of a clear_target_state.
4069 */
4070 ahd_outb(ahd, LASTPHASE, P_BUSFREE);
4071 ahd_outb(ahd, SEQ_FLAGS, NOT_IDENTIFIED|NO_CDB_SENT);
4072 ahd_outb(ahd, SEQCTL0, FASTMODE|SEQRESET);
4073 } else {
4074 ahd_clear_msg_state(ahd);
4075 ahd_outb(ahd, RETURN_1, EXIT_MSG_LOOP);
4076 }
4077 }
4078 }
4079
4080 /*
4081 * See if we sent a particular extended message to the target.
4082 * If "full" is true, return true only if the target saw the full
4083 * message. If "full" is false, return true if the target saw at
4084 * least the first byte of the message.
4085 */
4086 static int
4087 ahd_sent_msg(struct ahd_softc *ahd, ahd_msgtype type, u_int msgval, int full)
4088 {
4089 int found;
4090 u_int index;
4091
4092 found = FALSE;
4093 index = 0;
4094
4095 while (index < ahd->msgout_len) {
4096 if (ahd->msgout_buf[index] == MSG_EXTENDED) {
4097 u_int end_index;
4098
4099 end_index = index + 1 + ahd->msgout_buf[index + 1];
4100 if (ahd->msgout_buf[index+2] == msgval
4101 && type == AHDMSG_EXT) {
4102
4103 if (full) {
4104 if (ahd->msgout_index > end_index)
4105 found = TRUE;
4106 } else if (ahd->msgout_index > index)
4107 found = TRUE;
4108 }
4109 index = end_index;
4110 } else if (ahd->msgout_buf[index] >= MSG_SIMPLE_TASK
4111 && ahd->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) {
4112
4113 /* Skip tag type and tag id or residue param*/
4114 index += 2;
4115 } else {
4116 /* Single byte message */
4117 if (type == AHDMSG_1B
4118 && ahd->msgout_index > index
4119 && (ahd->msgout_buf[index] == msgval
4120 || ((ahd->msgout_buf[index] & MSG_IDENTIFYFLAG) != 0
4121 && msgval == MSG_IDENTIFYFLAG)))
4122 found = TRUE;
4123 index++;
4124 }
4125
4126 if (found)
4127 break;
4128 }
4129 return (found);
4130 }
4131
4132 /*
4133 * Wait for a complete incoming message, parse it, and respond accordingly.
4134 */
4135 static int
4136 ahd_parse_msg(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
4137 {
4138 struct ahd_initiator_tinfo *tinfo;
4139 struct ahd_tmode_tstate *tstate;
4140 int reject;
4141 int done;
4142 int response;
4143
4144 done = MSGLOOP_IN_PROG;
4145 response = FALSE;
4146 reject = FALSE;
4147 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel, devinfo->our_scsiid,
4148 devinfo->target, &tstate);
4149
4150 /*
4151 * Parse as much of the message as is available,
4152 * rejecting it if we don't support it. When
4153 * the entire message is available and has been
4154 * handled, return MSGLOOP_MSGCOMPLETE, indicating
4155 * that we have parsed an entire message.
4156 *
4157 * In the case of extended messages, we accept the length
4158 * byte outright and perform more checking once we know the
4159 * extended message type.
4160 */
4161 switch (ahd->msgin_buf[0]) {
4162 case MSG_DISCONNECT:
4163 case MSG_SAVEDATAPOINTER:
4164 case MSG_CMDCOMPLETE:
4165 case MSG_RESTOREPOINTERS:
4166 case MSG_IGN_WIDE_RESIDUE:
4167 /*
4168 * End our message loop as these are messages
4169 * the sequencer handles on its own.
4170 */
4171 done = MSGLOOP_TERMINATED;
4172 break;
4173 case MSG_MESSAGE_REJECT:
4174 response = ahd_handle_msg_reject(ahd, devinfo);
4175 /* FALLTHROUGH */
4176 case MSG_NOOP:
4177 done = MSGLOOP_MSGCOMPLETE;
4178 break;
4179 case MSG_EXTENDED:
4180 {
4181 /* Wait for enough of the message to begin validation */
4182 if (ahd->msgin_index < 2)
4183 break;
4184 switch (ahd->msgin_buf[2]) {
4185 case MSG_EXT_SDTR:
4186 {
4187 u_int period;
4188 u_int ppr_options;
4189 u_int offset;
4190 u_int saved_offset;
4191
4192 if (ahd->msgin_buf[1] != MSG_EXT_SDTR_LEN) {
4193 reject = TRUE;
4194 break;
4195 }
4196
4197 /*
4198 * Wait until we have both args before validating
4199 * and acting on this message.
4200 *
4201 * Add one to MSG_EXT_SDTR_LEN to account for
4202 * the extended message preamble.
4203 */
4204 if (ahd->msgin_index < (MSG_EXT_SDTR_LEN + 1))
4205 break;
4206
4207 period = ahd->msgin_buf[3];
4208 ppr_options = 0;
4209 saved_offset = offset = ahd->msgin_buf[4];
4210 ahd_devlimited_syncrate(ahd, tinfo, &period,
4211 &ppr_options, devinfo->role);
4212 ahd_validate_offset(ahd, tinfo, period, &offset,
4213 tinfo->curr.width, devinfo->role);
4214 if (bootverbose) {
4215 printf("(%s:%c:%d:%d): Received "
4216 "SDTR period %x, offset %x\n\t"
4217 "Filtered to period %x, offset %x\n",
4218 ahd_name(ahd), devinfo->channel,
4219 devinfo->target, devinfo->lun,
4220 ahd->msgin_buf[3], saved_offset,
4221 period, offset);
4222 }
4223 ahd_set_syncrate(ahd, devinfo, period,
4224 offset, ppr_options,
4225 AHD_TRANS_ACTIVE|AHD_TRANS_GOAL,
4226 /*paused*/TRUE);
4227
4228 /*
4229 * See if we initiated Sync Negotiation
4230 * and didn't have to fall down to async
4231 * transfers.
4232 */
4233 if (ahd_sent_msg(ahd, AHDMSG_EXT, MSG_EXT_SDTR, TRUE)) {
4234 /* We started it */
4235 if (saved_offset != offset) {
4236 /* Went too low - force async */
4237 reject = TRUE;
4238 }
4239 } else {
4240 /*
4241 * Send our own SDTR in reply
4242 */
4243 if (bootverbose
4244 && devinfo->role == ROLE_INITIATOR) {
4245 printf("(%s:%c:%d:%d): Target "
4246 "Initiated SDTR\n",
4247 ahd_name(ahd), devinfo->channel,
4248 devinfo->target, devinfo->lun);
4249 }
4250 ahd->msgout_index = 0;
4251 ahd->msgout_len = 0;
4252 ahd_construct_sdtr(ahd, devinfo,
4253 period, offset);
4254 ahd->msgout_index = 0;
4255 response = TRUE;
4256 }
4257 done = MSGLOOP_MSGCOMPLETE;
4258 break;
4259 }
4260 case MSG_EXT_WDTR:
4261 {
4262 u_int bus_width;
4263 u_int saved_width;
4264 u_int sending_reply;
4265
4266 sending_reply = FALSE;
4267 if (ahd->msgin_buf[1] != MSG_EXT_WDTR_LEN) {
4268 reject = TRUE;
4269 break;
4270 }
4271
4272 /*
4273 * Wait until we have our arg before validating
4274 * and acting on this message.
4275 *
4276 * Add one to MSG_EXT_WDTR_LEN to account for
4277 * the extended message preamble.
4278 */
4279 if (ahd->msgin_index < (MSG_EXT_WDTR_LEN + 1))
4280 break;
4281
4282 bus_width = ahd->msgin_buf[3];
4283 saved_width = bus_width;
4284 ahd_validate_width(ahd, tinfo, &bus_width,
4285 devinfo->role);
4286 if (bootverbose) {
4287 printf("(%s:%c:%d:%d): Received WDTR "
4288 "%x filtered to %x\n",
4289 ahd_name(ahd), devinfo->channel,
4290 devinfo->target, devinfo->lun,
4291 saved_width, bus_width);
4292 }
4293
4294 if (ahd_sent_msg(ahd, AHDMSG_EXT, MSG_EXT_WDTR, TRUE)) {
4295 /*
4296 * Don't send a WDTR back to the
4297 * target, since we asked first.
4298 * If the width went higher than our
4299 * request, reject it.
4300 */
4301 if (saved_width > bus_width) {
4302 reject = TRUE;
4303 printf("(%s:%c:%d:%d): requested %dBit "
4304 "transfers. Rejecting...\n",
4305 ahd_name(ahd), devinfo->channel,
4306 devinfo->target, devinfo->lun,
4307 8 * (0x01 << bus_width));
4308 bus_width = 0;
4309 }
4310 } else {
4311 /*
4312 * Send our own WDTR in reply
4313 */
4314 if (bootverbose
4315 && devinfo->role == ROLE_INITIATOR) {
4316 printf("(%s:%c:%d:%d): Target "
4317 "Initiated WDTR\n",
4318 ahd_name(ahd), devinfo->channel,
4319 devinfo->target, devinfo->lun);
4320 }
4321 ahd->msgout_index = 0;
4322 ahd->msgout_len = 0;
4323 ahd_construct_wdtr(ahd, devinfo, bus_width);
4324 ahd->msgout_index = 0;
4325 response = TRUE;
4326 sending_reply = TRUE;
4327 }
4328 /*
4329 * After a wide message, we are async, but
4330 * some devices don't seem to honor this portion
4331 * of the spec. Force a renegotiation of the
4332 * sync component of our transfer agreement even
4333 * if our goal is async. By updating our width
4334 * after forcing the negotiation, we avoid
4335 * renegotiating for width.
4336 */
4337 ahd_update_neg_request(ahd, devinfo, tstate,
4338 tinfo, AHD_NEG_ALWAYS);
4339 ahd_set_width(ahd, devinfo, bus_width,
4340 AHD_TRANS_ACTIVE|AHD_TRANS_GOAL,
4341 /*paused*/TRUE);
4342 if (sending_reply == FALSE && reject == FALSE) {
4343
4344 /*
4345 * We will always have an SDTR to send.
4346 */
4347 ahd->msgout_index = 0;
4348 ahd->msgout_len = 0;
4349 ahd_build_transfer_msg(ahd, devinfo);
4350 ahd->msgout_index = 0;
4351 response = TRUE;
4352 }
4353 done = MSGLOOP_MSGCOMPLETE;
4354 break;
4355 }
4356 case MSG_EXT_PPR:
4357 {
4358 u_int period;
4359 u_int offset;
4360 u_int bus_width;
4361 u_int ppr_options;
4362 u_int saved_width;
4363 u_int saved_offset;
4364 u_int saved_ppr_options;
4365
4366 if (ahd->msgin_buf[1] != MSG_EXT_PPR_LEN) {
4367 reject = TRUE;
4368 break;
4369 }
4370
4371 /*
4372 * Wait until we have all args before validating
4373 * and acting on this message.
4374 *
4375 * Add one to MSG_EXT_PPR_LEN to account for
4376 * the extended message preamble.
4377 */
4378 if (ahd->msgin_index < (MSG_EXT_PPR_LEN + 1))
4379 break;
4380
4381 period = ahd->msgin_buf[3];
4382 offset = ahd->msgin_buf[5];
4383 bus_width = ahd->msgin_buf[6];
4384 saved_width = bus_width;
4385 ppr_options = ahd->msgin_buf[7];
4386 /*
4387 * According to the spec, a DT only
4388 * period factor with no DT option
4389 * set implies async.
4390 */
4391 if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0
4392 && period <= 9)
4393 offset = 0;
4394 saved_ppr_options = ppr_options;
4395 saved_offset = offset;
4396
4397 /*
4398 * Transfer options are only available if we
4399 * are negotiating wide.
4400 */
4401 if (bus_width == 0)
4402 ppr_options &= MSG_EXT_PPR_QAS_REQ;
4403
4404 ahd_validate_width(ahd, tinfo, &bus_width,
4405 devinfo->role);
4406 ahd_devlimited_syncrate(ahd, tinfo, &period,
4407 &ppr_options, devinfo->role);
4408 ahd_validate_offset(ahd, tinfo, period, &offset,
4409 bus_width, devinfo->role);
4410
4411 if (ahd_sent_msg(ahd, AHDMSG_EXT, MSG_EXT_PPR, TRUE)) {
4412 /*
4413 * If we are unable to do any of the
4414 * requested options (we went too low),
4415 * then we'll have to reject the message.
4416 */
4417 if (saved_width > bus_width
4418 || saved_offset != offset
4419 || saved_ppr_options != ppr_options) {
4420 reject = TRUE;
4421 period = 0;
4422 offset = 0;
4423 bus_width = 0;
4424 ppr_options = 0;
4425 }
4426 } else {
4427 if (devinfo->role != ROLE_TARGET)
4428 printf("(%s:%c:%d:%d): Target "
4429 "Initiated PPR\n",
4430 ahd_name(ahd), devinfo->channel,
4431 devinfo->target, devinfo->lun);
4432 else
4433 printf("(%s:%c:%d:%d): Initiator "
4434 "Initiated PPR\n",
4435 ahd_name(ahd), devinfo->channel,
4436 devinfo->target, devinfo->lun);
4437 ahd->msgout_index = 0;
4438 ahd->msgout_len = 0;
4439 ahd_construct_ppr(ahd, devinfo, period, offset,
4440 bus_width, ppr_options);
4441 ahd->msgout_index = 0;
4442 response = TRUE;
4443 }
4444 if (bootverbose) {
4445 printf("(%s:%c:%d:%d): Received PPR width %x, "
4446 "period %x, offset %x,options %x\n"
4447 "\tFiltered to width %x, period %x, "
4448 "offset %x, options %x\n",
4449 ahd_name(ahd), devinfo->channel,
4450 devinfo->target, devinfo->lun,
4451 saved_width, ahd->msgin_buf[3],
4452 saved_offset, saved_ppr_options,
4453 bus_width, period, offset, ppr_options);
4454 }
4455 ahd_set_width(ahd, devinfo, bus_width,
4456 AHD_TRANS_ACTIVE|AHD_TRANS_GOAL,
4457 /*paused*/TRUE);
4458 ahd_set_syncrate(ahd, devinfo, period,
4459 offset, ppr_options,
4460 AHD_TRANS_ACTIVE|AHD_TRANS_GOAL,
4461 /*paused*/TRUE);
4462
4463 done = MSGLOOP_MSGCOMPLETE;
4464 break;
4465 }
4466 default:
4467 /* Unknown extended message. Reject it. */
4468 reject = TRUE;
4469 break;
4470 }
4471 break;
4472 }
4473 #ifdef AHD_TARGET_MODE
4474 case MSG_BUS_DEV_RESET:
4475 ahd_handle_devreset(ahd, devinfo, CAM_LUN_WILDCARD,
4476 CAM_BDR_SENT,
4477 "Bus Device Reset Received",
4478 /*verbose_level*/0);
4479 ahd_restart(ahd);
4480 done = MSGLOOP_TERMINATED;
4481 break;
4482 case MSG_ABORT_TAG:
4483 case MSG_ABORT:
4484 case MSG_CLEAR_QUEUE:
4485 {
4486 int tag;
4487
4488 /* Target mode messages */
4489 if (devinfo->role != ROLE_TARGET) {
4490 reject = TRUE;
4491 break;
4492 }
4493 tag = SCB_LIST_NULL;
4494 if (ahd->msgin_buf[0] == MSG_ABORT_TAG)
4495 tag = ahd_inb(ahd, INITIATOR_TAG);
4496 ahd_abort_scbs(ahd, devinfo->target, devinfo->channel,
4497 devinfo->lun, tag, ROLE_TARGET,
4498 CAM_REQ_ABORTED);
4499
4500 tstate = ahd->enabled_targets[devinfo->our_scsiid];
4501 if (tstate != NULL) {
4502 struct ahd_tmode_lstate* lstate;
4503
4504 lstate = tstate->enabled_luns[devinfo->lun];
4505 if (lstate != NULL) {
4506 ahd_queue_lstate_event(ahd, lstate,
4507 devinfo->our_scsiid,
4508 ahd->msgin_buf[0],
4509 /*arg*/tag);
4510 ahd_send_lstate_events(ahd, lstate);
4511 }
4512 }
4513 ahd_restart(ahd);
4514 done = MSGLOOP_TERMINATED;
4515 break;
4516 }
4517 #endif
4518 case MSG_QAS_REQUEST:
4519 #ifdef AHD_DEBUG
4520 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
4521 printf("%s: QAS request. SCSISIGI == 0x%x\n",
4522 ahd_name(ahd), ahd_inb(ahd, SCSISIGI));
4523 #endif
4524 ahd->msg_flags |= MSG_FLAG_EXPECT_QASREJ_BUSFREE;
4525 /* FALLTHROUGH */
4526 case MSG_TERM_IO_PROC:
4527 default:
4528 reject = TRUE;
4529 break;
4530 }
4531
4532 if (reject) {
4533 /*
4534 * Setup to reject the message.
4535 */
4536 ahd->msgout_index = 0;
4537 ahd->msgout_len = 1;
4538 ahd->msgout_buf[0] = MSG_MESSAGE_REJECT;
4539 done = MSGLOOP_MSGCOMPLETE;
4540 response = TRUE;
4541 }
4542
4543 if (done != MSGLOOP_IN_PROG && !response)
4544 /* Clear the outgoing message buffer */
4545 ahd->msgout_len = 0;
4546
4547 return (done);
4548 }
4549
4550 /*
4551 * Process a message reject message.
4552 */
4553 static int
4554 ahd_handle_msg_reject(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
4555 {
4556 /*
4557 * What we care about here is if we had an
4558 * outstanding SDTR or WDTR message for this
4559 * target. If we did, this is a signal that
4560 * the target is refusing negotiation.
4561 */
4562 struct scb *scb;
4563 struct ahd_initiator_tinfo *tinfo;
4564 struct ahd_tmode_tstate *tstate;
4565 u_int scb_index;
4566 u_int last_msg;
4567 int response = 0;
4568
4569 scb_index = ahd_get_scbptr(ahd);
4570 scb = ahd_lookup_scb(ahd, scb_index);
4571 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
4572 devinfo->our_scsiid,
4573 devinfo->target, &tstate);
4574 /* Might be necessary */
4575 last_msg = ahd_inb(ahd, LAST_MSG);
4576
4577 if (ahd_sent_msg(ahd, AHDMSG_EXT, MSG_EXT_PPR, /*full*/FALSE)) {
4578 if (ahd_sent_msg(ahd, AHDMSG_EXT, MSG_EXT_PPR, /*full*/TRUE)
4579 && tinfo->goal.period <= AHD_SYNCRATE_PACED) {
4580 /*
4581 * Target may not like our SPI-4 PPR Options.
4582 * Attempt to negotiate 80MHz which will turn
4583 * off these options.
4584 */
4585 if (bootverbose) {
4586 printf("(%s:%c:%d:%d): PPR Rejected. "
4587 "Trying simple U160 PPR\n",
4588 ahd_name(ahd), devinfo->channel,
4589 devinfo->target, devinfo->lun);
4590 }
4591 tinfo->goal.period = AHD_SYNCRATE_DT;
4592 tinfo->goal.ppr_options &= MSG_EXT_PPR_IU_REQ
4593 | MSG_EXT_PPR_QAS_REQ
4594 | MSG_EXT_PPR_DT_REQ;
4595 } else {
4596 /*
4597 * Target does not support the PPR message.
4598 * Attempt to negotiate SPI-2 style.
4599 */
4600 if (bootverbose) {
4601 printf("(%s:%c:%d:%d): PPR Rejected. "
4602 "Trying WDTR/SDTR\n",
4603 ahd_name(ahd), devinfo->channel,
4604 devinfo->target, devinfo->lun);
4605 }
4606 tinfo->goal.ppr_options = 0;
4607 tinfo->curr.transport_version = 2;
4608 tinfo->goal.transport_version = 2;
4609 }
4610 ahd->msgout_index = 0;
4611 ahd->msgout_len = 0;
4612 ahd_build_transfer_msg(ahd, devinfo);
4613 ahd->msgout_index = 0;
4614 response = 1;
4615 } else if (ahd_sent_msg(ahd, AHDMSG_EXT, MSG_EXT_WDTR, /*full*/FALSE)) {
4616
4617 /* note 8bit xfers */
4618 printf("(%s:%c:%d:%d): refuses WIDE negotiation. Using "
4619 "8bit transfers\n", ahd_name(ahd),
4620 devinfo->channel, devinfo->target, devinfo->lun);
4621 ahd_set_width(ahd, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
4622 AHD_TRANS_ACTIVE|AHD_TRANS_GOAL,
4623 /*paused*/TRUE);
4624 /*
4625 * No need to clear the sync rate. If the target
4626 * did not accept the command, our syncrate is
4627 * unaffected. If the target started the negotiation,
4628 * but rejected our response, we already cleared the
4629 * sync rate before sending our WDTR.
4630 */
4631 if (tinfo->goal.offset != tinfo->curr.offset) {
4632
4633 /* Start the sync negotiation */
4634 ahd->msgout_index = 0;
4635 ahd->msgout_len = 0;
4636 ahd_build_transfer_msg(ahd, devinfo);
4637 ahd->msgout_index = 0;
4638 response = 1;
4639 }
4640 } else if (ahd_sent_msg(ahd, AHDMSG_EXT, MSG_EXT_SDTR, /*full*/FALSE)) {
4641 /* note asynch xfers and clear flag */
4642 ahd_set_syncrate(ahd, devinfo, /*period*/0,
4643 /*offset*/0, /*ppr_options*/0,
4644 AHD_TRANS_ACTIVE|AHD_TRANS_GOAL,
4645 /*paused*/TRUE);
4646 printf("(%s:%c:%d:%d): refuses synchronous negotiation. "
4647 "Using asynchronous transfers\n",
4648 ahd_name(ahd), devinfo->channel,
4649 devinfo->target, devinfo->lun);
4650 } else if ((scb->hscb->control & MSG_SIMPLE_TASK) != 0) {
4651 int tag_type;
4652 int mask;
4653
4654 tag_type = (scb->hscb->control & MSG_SIMPLE_TASK);
4655
4656 if (tag_type == MSG_SIMPLE_TASK) {
4657 printf("(%s:%c:%d:%d): refuses tagged commands. "
4658 "Performing non-tagged I/O\n", ahd_name(ahd),
4659 devinfo->channel, devinfo->target, devinfo->lun);
4660 ahd_set_tags(ahd, devinfo, AHD_QUEUE_NONE);
4661 mask = ~0x23;
4662 } else {
4663 printf("(%s:%c:%d:%d): refuses %s tagged commands. "
4664 "Performing simple queue tagged I/O only\n",
4665 ahd_name(ahd), devinfo->channel, devinfo->target,
4666 devinfo->lun, tag_type == MSG_ORDERED_TASK
4667 ? "ordered" : "head of queue");
4668 ahd_set_tags(ahd, devinfo, AHD_QUEUE_BASIC);
4669 mask = ~0x03;
4670 }
4671
4672 /*
4673 * Resend the identify for this CCB as the target
4674 * may believe that the selection is invalid otherwise.
4675 */
4676 ahd_outb(ahd, SCB_CONTROL,
4677 ahd_inb_scbram(ahd, SCB_CONTROL) & mask);
4678 scb->hscb->control &= mask;
4679 ahd_set_transaction_tag(scb, /*enabled*/FALSE,
4680 /*type*/MSG_SIMPLE_TASK);
4681 ahd_outb(ahd, MSG_OUT, MSG_IDENTIFYFLAG);
4682 ahd_assert_atn(ahd);
4683 ahd_busy_tcl(ahd, BUILD_TCL(scb->hscb->scsiid, devinfo->lun),
4684 SCB_GET_TAG(scb));
4685
4686 /*
4687 * Requeue all tagged commands for this target
4688 * currently in our posession so they can be
4689 * converted to untagged commands.
4690 */
4691 ahd_search_qinfifo(ahd, SCB_GET_TARGET(ahd, scb),
4692 SCB_GET_CHANNEL(ahd, scb),
4693 SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL,
4694 ROLE_INITIATOR, CAM_REQUEUE_REQ,
4695 SEARCH_COMPLETE);
4696 } else if (ahd_sent_msg(ahd, AHDMSG_1B, MSG_IDENTIFYFLAG, TRUE)) {
4697 /*
4698 * Most likely the device believes that we had
4699 * previously negotiated packetized.
4700 */
4701 ahd->msg_flags |= MSG_FLAG_EXPECT_PPR_BUSFREE
4702 | MSG_FLAG_IU_REQ_CHANGED;
4703
4704 ahd_force_renegotiation(ahd, devinfo);
4705 ahd->msgout_index = 0;
4706 ahd->msgout_len = 0;
4707 ahd_build_transfer_msg(ahd, devinfo);
4708 ahd->msgout_index = 0;
4709 response = 1;
4710 } else {
4711 /*
4712 * Otherwise, we ignore it.
4713 */
4714 printf("%s:%c:%d: Message reject for %x -- ignored\n",
4715 ahd_name(ahd), devinfo->channel, devinfo->target,
4716 last_msg);
4717 }
4718 return (response);
4719 }
4720
4721 /*
4722 * Process an ingnore wide residue message.
4723 */
4724 static void
4725 ahd_handle_ign_wide_residue(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
4726 {
4727 u_int scb_index;
4728 struct scb *scb;
4729
4730 scb_index = ahd_get_scbptr(ahd);
4731 scb = ahd_lookup_scb(ahd, scb_index);
4732 /*
4733 * XXX Actually check data direction in the sequencer?
4734 * Perhaps add datadir to some spare bits in the hscb?
4735 */
4736 if ((ahd_inb(ahd, SEQ_FLAGS) & DPHASE) == 0
4737 || ahd_get_transfer_dir(scb) != CAM_DIR_IN) {
4738 /*
4739 * Ignore the message if we haven't
4740 * seen an appropriate data phase yet.
4741 */
4742 } else {
4743 /*
4744 * If the residual occurred on the last
4745 * transfer and the transfer request was
4746 * expected to end on an odd count, do
4747 * nothing. Otherwise, subtract a byte
4748 * and update the residual count accordingly.
4749 */
4750 uint32_t sgptr;
4751
4752 sgptr = ahd_inb_scbram(ahd, SCB_RESIDUAL_SGPTR);
4753 if ((sgptr & SG_LIST_NULL) != 0
4754 && (ahd_inb_scbram(ahd, SCB_TASK_ATTRIBUTE)
4755 & SCB_XFERLEN_ODD) != 0) {
4756 /*
4757 * If the residual occurred on the last
4758 * transfer and the transfer request was
4759 * expected to end on an odd count, do
4760 * nothing.
4761 */
4762 } else {
4763 uint32_t data_cnt;
4764 uint64_t data_addr;
4765 uint32_t sglen;
4766
4767 /* Pull in the rest of the sgptr */
4768 sgptr = ahd_inl_scbram(ahd, SCB_RESIDUAL_SGPTR);
4769 data_cnt = ahd_inl_scbram(ahd, SCB_RESIDUAL_DATACNT);
4770 if ((sgptr & SG_LIST_NULL) != 0) {
4771 /*
4772 * The residual data count is not updated
4773 * for the command run to completion case.
4774 * Explicitly zero the count.
4775 */
4776 data_cnt &= ~AHD_SG_LEN_MASK;
4777 }
4778 data_addr = ahd_inq(ahd, SHADDR);
4779 data_cnt += 1;
4780 data_addr -= 1;
4781 sgptr &= SG_PTR_MASK;
4782 if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) {
4783 struct ahd_dma64_seg *sg;
4784
4785 sg = ahd_sg_bus_to_virt(ahd, scb, sgptr);
4786
4787 /*
4788 * The residual sg ptr points to the next S/G
4789 * to load so we must go back one.
4790 */
4791 sg--;
4792 sglen = ahd_le32toh(sg->len) & AHD_SG_LEN_MASK;
4793 if (sg != scb->sg_list
4794 && sglen < (data_cnt & AHD_SG_LEN_MASK)) {
4795
4796 sg--;
4797 sglen = ahd_le32toh(sg->len);
4798 /*
4799 * Preserve High Address and SG_LIST
4800 * bits while setting the count to 1.
4801 */
4802 data_cnt = 1|(sglen&(~AHD_SG_LEN_MASK));
4803 data_addr = ahd_le64toh(sg->addr)
4804 + (sglen & AHD_SG_LEN_MASK)
4805 - 1;
4806
4807 /*
4808 * Increment sg so it points to the
4809 * "next" sg.
4810 */
4811 sg++;
4812 sgptr = ahd_sg_virt_to_bus(ahd, scb,
4813 sg);
4814 }
4815 } else {
4816 struct ahd_dma_seg *sg;
4817
4818 sg = ahd_sg_bus_to_virt(ahd, scb, sgptr);
4819
4820 /*
4821 * The residual sg ptr points to the next S/G
4822 * to load so we must go back one.
4823 */
4824 sg--;
4825 sglen = ahd_le32toh(sg->len) & AHD_SG_LEN_MASK;
4826 if (sg != scb->sg_list
4827 && sglen < (data_cnt & AHD_SG_LEN_MASK)) {
4828
4829 sg--;
4830 sglen = ahd_le32toh(sg->len);
4831 /*
4832 * Preserve High Address and SG_LIST
4833 * bits while setting the count to 1.
4834 */
4835 data_cnt = 1|(sglen&(~AHD_SG_LEN_MASK));
4836 data_addr = ahd_le32toh(sg->addr)
4837 + (sglen & AHD_SG_LEN_MASK)
4838 - 1;
4839
4840 /*
4841 * Increment sg so it points to the
4842 * "next" sg.
4843 */
4844 sg++;
4845 sgptr = ahd_sg_virt_to_bus(ahd, scb,
4846 sg);
4847 }
4848 }
4849 /*
4850 * Toggle the "oddness" of the transfer length
4851 * to handle this mid-transfer ignore wide
4852 * residue. This ensures that the oddness is
4853 * correct for subsequent data transfers.
4854 */
4855 ahd_outb(ahd, SCB_TASK_ATTRIBUTE,
4856 ahd_inb_scbram(ahd, SCB_TASK_ATTRIBUTE)
4857 ^ SCB_XFERLEN_ODD);
4858
4859 ahd_outl(ahd, SCB_RESIDUAL_SGPTR, sgptr);
4860 ahd_outl(ahd, SCB_RESIDUAL_DATACNT, data_cnt);
4861 /*
4862 * The FIFO's pointers will be updated if/when the
4863 * sequencer re-enters a data phase.
4864 */
4865 }
4866 }
4867 }
4868
4869
4870 /*
4871 * Reinitialize the data pointers for the active transfer
4872 * based on its current residual.
4873 */
4874 static void
4875 ahd_reinitialize_dataptrs(struct ahd_softc *ahd)
4876 {
4877 struct scb *scb;
4878 ahd_mode_state saved_modes;
4879 u_int scb_index;
4880 u_int wait;
4881 uint32_t sgptr;
4882 uint32_t resid;
4883 uint64_t dataptr;
4884
4885 AHD_ASSERT_MODES(ahd, AHD_MODE_DFF0_MSK|AHD_MODE_DFF1_MSK,
4886 AHD_MODE_DFF0_MSK|AHD_MODE_DFF1_MSK);
4887
4888 scb_index = ahd_get_scbptr(ahd);
4889 scb = ahd_lookup_scb(ahd, scb_index);
4890
4891 /*
4892 * Release and reacquire the FIFO so we
4893 * have a clean slate.
4894 */
4895 ahd_outb(ahd, DFFSXFRCTL, CLRCHN);
4896 wait = 1000;
4897 while (--wait && !(ahd_inb(ahd, MDFFSTAT) & FIFOFREE))
4898 ahd_delay(100);
4899 if (wait == 0) {
4900 ahd_print_path(ahd, scb);
4901 printf("ahd_reinitialize_dataptrs: Forcing FIFO free.\n");
4902 ahd_outb(ahd, DFFSXFRCTL, RSTCHN|CLRSHCNT);
4903 }
4904 saved_modes = ahd_save_modes(ahd);
4905 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
4906 ahd_outb(ahd, DFFSTAT,
4907 ahd_inb(ahd, DFFSTAT)
4908 | (saved_modes == 0x11 ? CURRFIFO_1 : CURRFIFO_0));
4909
4910 /*
4911 * Determine initial values for data_addr and data_cnt
4912 * for resuming the data phase.
4913 */
4914 sgptr = (ahd_inb_scbram(ahd, SCB_RESIDUAL_SGPTR + 3) << 24)
4915 | (ahd_inb_scbram(ahd, SCB_RESIDUAL_SGPTR + 2) << 16)
4916 | (ahd_inb_scbram(ahd, SCB_RESIDUAL_SGPTR + 1) << 8)
4917 | ahd_inb_scbram(ahd, SCB_RESIDUAL_SGPTR);
4918 sgptr &= SG_PTR_MASK;
4919
4920 resid = (ahd_inb_scbram(ahd, SCB_RESIDUAL_DATACNT + 2) << 16)
4921 | (ahd_inb_scbram(ahd, SCB_RESIDUAL_DATACNT + 1) << 8)
4922 | ahd_inb_scbram(ahd, SCB_RESIDUAL_DATACNT);
4923
4924 if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) {
4925 struct ahd_dma64_seg *sg;
4926
4927 sg = ahd_sg_bus_to_virt(ahd, scb, sgptr);
4928
4929 /* The residual sg_ptr always points to the next sg */
4930 sg--;
4931
4932 dataptr = ahd_le64toh(sg->addr)
4933 + (ahd_le32toh(sg->len) & AHD_SG_LEN_MASK)
4934 - resid;
4935 ahd_outb(ahd, HADDR + 7, dataptr >> 56);
4936 ahd_outb(ahd, HADDR + 6, dataptr >> 48);
4937 ahd_outb(ahd, HADDR + 5, dataptr >> 40);
4938 ahd_outb(ahd, HADDR + 4, dataptr >> 32);
4939 } else {
4940 struct ahd_dma_seg *sg;
4941
4942 sg = ahd_sg_bus_to_virt(ahd, scb, sgptr);
4943
4944 /* The residual sg_ptr always points to the next sg */
4945 sg--;
4946
4947 dataptr = ahd_le32toh(sg->addr)
4948 + (ahd_le32toh(sg->len) & AHD_SG_LEN_MASK)
4949 - resid;
4950 ahd_outb(ahd, HADDR + 4,
4951 (ahd_le32toh(sg->len) & ~AHD_SG_LEN_MASK) >> 24);
4952 }
4953 ahd_outb(ahd, HADDR + 3, dataptr >> 24);
4954 ahd_outb(ahd, HADDR + 2, dataptr >> 16);
4955 ahd_outb(ahd, HADDR + 1, dataptr >> 8);
4956 ahd_outb(ahd, HADDR, dataptr);
4957 ahd_outb(ahd, HCNT + 2, resid >> 16);
4958 ahd_outb(ahd, HCNT + 1, resid >> 8);
4959 ahd_outb(ahd, HCNT, resid);
4960 }
4961
4962 /*
4963 * Handle the effects of issuing a bus device reset message.
4964 */
4965 static void
4966 ahd_handle_devreset(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
4967 u_int lun, cam_status status, char *message,
4968 int verbose_level)
4969 {
4970 #ifdef AHD_TARGET_MODE
4971 struct ahd_tmode_tstate* tstate;
4972 #endif
4973 int found;
4974
4975 found = ahd_abort_scbs(ahd, devinfo->target, devinfo->channel,
4976 lun, SCB_LIST_NULL, devinfo->role,
4977 status);
4978
4979 #ifdef AHD_TARGET_MODE
4980 /*
4981 * Send an immediate notify ccb to all target mord peripheral
4982 * drivers affected by this action.
4983 */
4984 tstate = ahd->enabled_targets[devinfo->our_scsiid];
4985 if (tstate != NULL) {
4986 u_int cur_lun;
4987 u_int max_lun;
4988
4989 if (lun != CAM_LUN_WILDCARD) {
4990 cur_lun = 0;
4991 max_lun = AHD_NUM_LUNS - 1;
4992 } else {
4993 cur_lun = lun;
4994 max_lun = lun;
4995 }
4996 for (cur_lun <= max_lun; cur_lun++) {
4997 struct ahd_tmode_lstate* lstate;
4998
4999 lstate = tstate->enabled_luns[cur_lun];
5000 if (lstate == NULL)
5001 continue;
5002
5003 ahd_queue_lstate_event(ahd, lstate, devinfo->our_scsiid,
5004 MSG_BUS_DEV_RESET, /*arg*/0);
5005 ahd_send_lstate_events(ahd, lstate);
5006 }
5007 }
5008 #endif
5009
5010 /*
5011 * Go back to async/narrow transfers and renegotiate.
5012 */
5013 ahd_set_width(ahd, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
5014 AHD_TRANS_CUR, /*paused*/TRUE);
5015 ahd_set_syncrate(ahd, devinfo, /*period*/0, /*offset*/0,
5016 /*ppr_options*/0, AHD_TRANS_CUR, /*paused*/TRUE);
5017
5018 ahd_send_async(ahd, devinfo->channel, devinfo->target,
5019 lun, AC_SENT_BDR, NULL);
5020
5021 if (message != NULL
5022 && (verbose_level <= bootverbose))
5023 printf("%s: %s on %c:%d. %d SCBs aborted\n", ahd_name(ahd),
5024 message, devinfo->channel, devinfo->target, found);
5025 }
5026
5027 #ifdef AHD_TARGET_MODE
5028 static void
5029 ahd_setup_target_msgin(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
5030 struct scb *scb)
5031 {
5032
5033 /*
5034 * To facilitate adding multiple messages together,
5035 * each routine should increment the index and len
5036 * variables instead of setting them explicitly.
5037 */
5038 ahd->msgout_index = 0;
5039 ahd->msgout_len = 0;
5040
5041 if (scb != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 0)
5042 ahd_build_transfer_msg(ahd, devinfo);
5043 else
5044 panic("ahd_intr: AWAITING target message with no message");
5045
5046 ahd->msgout_index = 0;
5047 ahd->msg_type = MSG_TYPE_TARGET_MSGIN;
5048 }
5049 #endif
5050 /**************************** Initialization **********************************/
5051 static u_int
5052 ahd_sglist_size(struct ahd_softc *ahd)
5053 {
5054 bus_size_t list_size;
5055
5056 list_size = sizeof(struct ahd_dma_seg) * AHD_NSEG;
5057 if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0)
5058 list_size = sizeof(struct ahd_dma64_seg) * AHD_NSEG;
5059 return (list_size);
5060 }
5061
5062 /*
5063 * Calculate the optimum S/G List allocation size. S/G elements used
5064 * for a given transaction must be physically contiguous. Assume the
5065 * OS will allocate full pages to us, so it doesn't make sense to request
5066 * less than a page.
5067 */
5068 static u_int
5069 ahd_sglist_allocsize(struct ahd_softc *ahd)
5070 {
5071 bus_size_t sg_list_increment;
5072 bus_size_t sg_list_size;
5073 bus_size_t max_list_size;
5074 bus_size_t best_list_size;
5075
5076 /* Start out with the minimum required for AHD_NSEG. */
5077 sg_list_increment = ahd_sglist_size(ahd);
5078 sg_list_size = sg_list_increment;
5079
5080 /* Get us as close as possible to a page in size. */
5081 while ((sg_list_size + sg_list_increment) <= PAGE_SIZE)
5082 sg_list_size += sg_list_increment;
5083
5084 /*
5085 * Try to reduce the amount of wastage by allocating
5086 * multiple pages.
5087 */
5088 best_list_size = sg_list_size;
5089 max_list_size = roundup(sg_list_increment, PAGE_SIZE);
5090 if (max_list_size < 4 * PAGE_SIZE)
5091 max_list_size = 4 * PAGE_SIZE;
5092 if (max_list_size > (AHD_SCB_MAX_ALLOC * sg_list_increment))
5093 max_list_size = (AHD_SCB_MAX_ALLOC * sg_list_increment);
5094 while ((sg_list_size + sg_list_increment) <= max_list_size
5095 && (sg_list_size % PAGE_SIZE) != 0) {
5096 bus_size_t new_mod;
5097 bus_size_t best_mod;
5098
5099 sg_list_size += sg_list_increment;
5100 new_mod = sg_list_size % PAGE_SIZE;
5101 best_mod = best_list_size % PAGE_SIZE;
5102 if (new_mod > best_mod || new_mod == 0) {
5103 best_list_size = sg_list_size;
5104 }
5105 }
5106 return (best_list_size);
5107 }
5108
5109 /*
5110 * Allocate a controller structure for a new device
5111 * and perform initial initializion.
5112 */
5113 struct ahd_softc *
5114 ahd_alloc(void *platform_arg, char *name)
5115 {
5116 struct ahd_softc *ahd;
5117
5118 #ifndef __FreeBSD__
5119 ahd = malloc(sizeof(*ahd), M_DEVBUF, M_NOWAIT);
5120 if (!ahd) {
5121 printf("aic7xxx: cannot malloc softc!\n");
5122 free(name, M_DEVBUF);
5123 return NULL;
5124 }
5125 #else
5126 ahd = device_get_softc((device_t)platform_arg);
5127 #endif
5128 memset(ahd, 0, sizeof(*ahd));
5129 ahd->seep_config = malloc(sizeof(*ahd->seep_config),
5130 M_DEVBUF, M_NOWAIT);
5131 if (ahd->seep_config == NULL) {
5132 #ifndef __FreeBSD__
5133 free(ahd, M_DEVBUF);
5134 #endif
5135 free(name, M_DEVBUF);
5136 return (NULL);
5137 }
5138 LIST_INIT(&ahd->pending_scbs);
5139 /* We don't know our unit number until the OSM sets it */
5140 ahd->name = name;
5141 ahd->unit = -1;
5142 ahd->description = NULL;
5143 ahd->bus_description = NULL;
5144 ahd->channel = 'A';
5145 ahd->chip = AHD_NONE;
5146 ahd->features = AHD_FENONE;
5147 ahd->bugs = AHD_BUGNONE;
5148 ahd->flags = AHD_SPCHK_ENB_A|AHD_RESET_BUS_A|AHD_TERM_ENB_A
5149 | AHD_EXTENDED_TRANS_A|AHD_STPWLEVEL_A;
5150 ahd_timer_init(&ahd->reset_timer);
5151 ahd_timer_init(&ahd->stat_timer);
5152 ahd->int_coalescing_timer = AHD_INT_COALESCING_TIMER_DEFAULT;
5153 ahd->int_coalescing_maxcmds = AHD_INT_COALESCING_MAXCMDS_DEFAULT;
5154 ahd->int_coalescing_mincmds = AHD_INT_COALESCING_MINCMDS_DEFAULT;
5155 ahd->int_coalescing_threshold = AHD_INT_COALESCING_THRESHOLD_DEFAULT;
5156 ahd->int_coalescing_stop_threshold =
5157 AHD_INT_COALESCING_STOP_THRESHOLD_DEFAULT;
5158
5159 if (ahd_platform_alloc(ahd, platform_arg) != 0) {
5160 ahd_free(ahd);
5161 ahd = NULL;
5162 }
5163 #ifdef AHD_DEBUG
5164 if ((ahd_debug & AHD_SHOW_MEMORY) != 0) {
5165 printf("%s: scb size = 0x%x, hscb size = 0x%x\n",
5166 ahd_name(ahd), (u_int)sizeof(struct scb),
5167 (u_int)sizeof(struct hardware_scb));
5168 }
5169 #endif
5170 return (ahd);
5171 }
5172
5173 int
5174 ahd_softc_init(struct ahd_softc *ahd)
5175 {
5176
5177 ahd->unpause = 0;
5178 ahd->pause = PAUSE;
5179 return (0);
5180 }
5181
5182 void
5183 ahd_softc_insert(struct ahd_softc *ahd)
5184 {
5185 struct ahd_softc *list_ahd;
5186
5187 #if AHD_PCI_CONFIG > 0
5188 /*
5189 * Second Function PCI devices need to inherit some
5190 * settings from function 0.
5191 */
5192 if ((ahd->features & AHD_MULTI_FUNC) != 0) {
5193 TAILQ_FOREACH(list_ahd, &ahd_tailq, links) {
5194 ahd_dev_softc_t list_pci;
5195 ahd_dev_softc_t pci;
5196
5197 list_pci = list_ahd->dev_softc;
5198 pci = ahd->dev_softc;
5199 if (ahd_get_pci_slot(list_pci) == ahd_get_pci_slot(pci)
5200 && ahd_get_pci_bus(list_pci) == ahd_get_pci_bus(pci)) {
5201 struct ahd_softc *master;
5202 struct ahd_softc *slave;
5203
5204 if (ahd_get_pci_function(list_pci) == 0) {
5205 master = list_ahd;
5206 slave = ahd;
5207 } else {
5208 master = ahd;
5209 slave = list_ahd;
5210 }
5211 slave->flags &= ~AHD_BIOS_ENABLED;
5212 slave->flags |=
5213 master->flags & AHD_BIOS_ENABLED;
5214 break;
5215 }
5216 }
5217 }
5218 #endif
5219
5220 /*
5221 * Insertion sort into our list of softcs.
5222 */
5223 list_ahd = TAILQ_FIRST(&ahd_tailq);
5224 while (list_ahd != NULL
5225 && ahd_softc_comp(ahd, list_ahd) <= 0)
5226 list_ahd = TAILQ_NEXT(list_ahd, links);
5227 if (list_ahd != NULL)
5228 TAILQ_INSERT_BEFORE(list_ahd, ahd, links);
5229 else
5230 TAILQ_INSERT_TAIL(&ahd_tailq, ahd, links);
5231 ahd->init_level++;
5232 }
5233
5234 /*
5235 * Verify that the passed in softc pointer is for a
5236 * controller that is still configured.
5237 */
5238 struct ahd_softc *
5239 ahd_find_softc(struct ahd_softc *ahd)
5240 {
5241 struct ahd_softc *list_ahd;
5242
5243 TAILQ_FOREACH(list_ahd, &ahd_tailq, links) {
5244 if (list_ahd == ahd)
5245 return (ahd);
5246 }
5247 return (NULL);
5248 }
5249
5250 void
5251 ahd_set_unit(struct ahd_softc *ahd, int unit)
5252 {
5253 ahd->unit = unit;
5254 }
5255
5256 void
5257 ahd_set_name(struct ahd_softc *ahd, char *name)
5258 {
5259 if (ahd->name != NULL)
5260 free(ahd->name, M_DEVBUF);
5261 ahd->name = name;
5262 }
5263
5264 void
5265 ahd_free(struct ahd_softc *ahd)
5266 {
5267 int i;
5268
5269 switch (ahd->init_level) {
5270 default:
5271 case 5:
5272 ahd_shutdown(ahd);
5273 /* FALLTHROUGH */
5274 case 4:
5275 ahd_dmamap_unload(ahd, ahd->shared_data_dmat,
5276 ahd->shared_data_dmamap);
5277 /* FALLTHROUGH */
5278 case 3:
5279 ahd_dmamem_free(ahd, ahd->shared_data_dmat, ahd->qoutfifo,
5280 ahd->shared_data_dmamap);
5281 ahd_dmamap_destroy(ahd, ahd->shared_data_dmat,
5282 ahd->shared_data_dmamap);
5283 /* FALLTHROUGH */
5284 case 2:
5285 ahd_dma_tag_destroy(ahd, ahd->shared_data_dmat);
5286 case 1:
5287 #ifndef __linux__
5288 ahd_dma_tag_destroy(ahd, ahd->buffer_dmat);
5289 #endif
5290 break;
5291 case 0:
5292 break;
5293 }
5294
5295 #ifndef __linux__
5296 ahd_dma_tag_destroy(ahd, ahd->parent_dmat);
5297 #endif
5298 ahd_platform_free(ahd);
5299 ahd_fini_scbdata(ahd);
5300 for (i = 0; i < AHD_NUM_TARGETS; i++) {
5301 struct ahd_tmode_tstate *tstate;
5302
5303 tstate = ahd->enabled_targets[i];
5304 if (tstate != NULL) {
5305 #ifdef AHD_TARGET_MODE
5306 int j;
5307
5308 for (j = 0; j < AHD_NUM_LUNS; j++) {
5309 struct ahd_tmode_lstate *lstate;
5310
5311 lstate = tstate->enabled_luns[j];
5312 if (lstate != NULL) {
5313 xpt_free_path(lstate->path);
5314 free(lstate, M_DEVBUF);
5315 }
5316 }
5317 #endif
5318 free(tstate, M_DEVBUF);
5319 }
5320 }
5321 #ifdef AHD_TARGET_MODE
5322 if (ahd->black_hole != NULL) {
5323 xpt_free_path(ahd->black_hole->path);
5324 free(ahd->black_hole, M_DEVBUF);
5325 }
5326 #endif
5327 if (ahd->name != NULL)
5328 free(ahd->name, M_DEVBUF);
5329 if (ahd->seep_config != NULL)
5330 free(ahd->seep_config, M_DEVBUF);
5331 if (ahd->saved_stack != NULL)
5332 free(ahd->saved_stack, M_DEVBUF);
5333 #ifndef __FreeBSD__
5334 free(ahd, M_DEVBUF);
5335 #endif
5336 return;
5337 }
5338
5339 void
5340 ahd_shutdown(void *arg)
5341 {
5342 struct ahd_softc *ahd;
5343
5344 ahd = (struct ahd_softc *)arg;
5345
5346 /*
5347 * Stop periodic timer callbacks.
5348 */
5349 ahd_timer_stop(&ahd->reset_timer);
5350 ahd_timer_stop(&ahd->stat_timer);
5351
5352 /* This will reset most registers to 0, but not all */
5353 ahd_reset(ahd, /*reinit*/FALSE);
5354 }
5355
5356 /*
5357 * Reset the controller and record some information about it
5358 * that is only available just after a reset. If "reinit" is
5359 * non-zero, this reset occured after initial configuration
5360 * and the caller requests that the chip be fully reinitialized
5361 * to a runable state. Chip interrupts are *not* enabled after
5362 * a reinitialization. The caller must enable interrupts via
5363 * ahd_intr_enable().
5364 */
5365 int
5366 ahd_reset(struct ahd_softc *ahd, int reinit)
5367 {
5368 u_int sxfrctl1;
5369 int wait;
5370 uint32_t cmd;
5371
5372 /*
5373 * Preserve the value of the SXFRCTL1 register for all channels.
5374 * It contains settings that affect termination and we don't want
5375 * to disturb the integrity of the bus.
5376 */
5377 ahd_pause(ahd);
5378 ahd_update_modes(ahd);
5379 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
5380 sxfrctl1 = ahd_inb(ahd, SXFRCTL1);
5381
5382 cmd = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/2);
5383 if ((ahd->bugs & AHD_PCIX_CHIPRST_BUG) != 0) {
5384 uint32_t mod_cmd;
5385
5386 /*
5387 * A4 Razor #632
5388 * During the assertion of CHIPRST, the chip
5389 * does not disable its parity logic prior to
5390 * the start of the reset. This may cause a
5391 * parity error to be detected and thus a
5392 * spurious SERR or PERR assertion. Disble
5393 * PERR and SERR responses during the CHIPRST.
5394 */
5395 mod_cmd = cmd & ~(PCIM_CMD_PERRESPEN|PCIM_CMD_SERRESPEN);
5396 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
5397 mod_cmd, /*bytes*/2);
5398 }
5399 ahd_outb(ahd, HCNTRL, CHIPRST | ahd->pause);
5400
5401 /*
5402 * Ensure that the reset has finished. We delay 1000us
5403 * prior to reading the register to make sure the chip
5404 * has sufficiently completed its reset to handle register
5405 * accesses.
5406 */
5407 wait = 1000;
5408 do {
5409 ahd_delay(1000);
5410 } while (--wait && !(ahd_inb(ahd, HCNTRL) & CHIPRSTACK));
5411
5412 if (wait == 0) {
5413 printf("%s: WARNING - Failed chip reset! "
5414 "Trying to initialize anyway.\n", ahd_name(ahd));
5415 }
5416 ahd_outb(ahd, HCNTRL, ahd->pause);
5417
5418 if ((ahd->bugs & AHD_PCIX_CHIPRST_BUG) != 0) {
5419 /*
5420 * Clear any latched PCI error status and restore
5421 * previous SERR and PERR response enables.
5422 */
5423 ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
5424 0xFF, /*bytes*/1);
5425 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
5426 cmd, /*bytes*/2);
5427 }
5428
5429 /*
5430 * Mode should be SCSI after a chip reset, but lets
5431 * set it just to be safe. We touch the MODE_PTR
5432 * register directly so as to bypass the lazy update
5433 * code in ahd_set_modes().
5434 */
5435 ahd_known_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
5436 ahd_outb(ahd, MODE_PTR,
5437 ahd_build_mode_state(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI));
5438
5439 /*
5440 * Restore SXFRCTL1.
5441 *
5442 * We must always initialize STPWEN to 1 before we
5443 * restore the saved values. STPWEN is initialized
5444 * to a tri-state condition which can only be cleared
5445 * by turning it on.
5446 */
5447 ahd_outb(ahd, SXFRCTL1, sxfrctl1|STPWEN);
5448 ahd_outb(ahd, SXFRCTL1, sxfrctl1);
5449
5450 /* Determine chip configuration */
5451 ahd->features &= ~AHD_WIDE;
5452 if ((ahd_inb(ahd, SBLKCTL) & SELWIDE) != 0)
5453 ahd->features |= AHD_WIDE;
5454
5455 /*
5456 * If a recovery action has forced a chip reset,
5457 * re-initialize the chip to our liking.
5458 */
5459 if (reinit != 0)
5460 ahd_chip_init(ahd);
5461
5462 return (0);
5463 }
5464
5465 /*
5466 * Determine the number of SCBs available on the controller
5467 */
5468 int
5469 ahd_probe_scbs(struct ahd_softc *ahd) {
5470 int i;
5471
5472 AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK),
5473 ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK));
5474 for (i = 0; i < AHD_SCB_MAX; i++) {
5475 int j;
5476
5477 ahd_set_scbptr(ahd, i);
5478 ahd_outw(ahd, SCB_BASE, i);
5479 for (j = 2; j < 64; j++)
5480 ahd_outb(ahd, SCB_BASE+j, 0);
5481 /* Start out life as unallocated (needing an abort) */
5482 ahd_outb(ahd, SCB_CONTROL, MK_MESSAGE);
5483 if (ahd_inw_scbram(ahd, SCB_BASE) != i)
5484 break;
5485 ahd_set_scbptr(ahd, 0);
5486 if (ahd_inw_scbram(ahd, SCB_BASE) != 0)
5487 break;
5488 }
5489 return (i);
5490 }
5491
5492 static void
5493 ahd_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
5494 {
5495 dma_addr_t *baddr;
5496
5497 baddr = (dma_addr_t *)arg;
5498 *baddr = segs->ds_addr;
5499 }
5500
5501 static void
5502 ahd_initialize_hscbs(struct ahd_softc *ahd)
5503 {
5504 int i;
5505
5506 for (i = 0; i < ahd->scb_data.maxhscbs; i++) {
5507 ahd_set_scbptr(ahd, i);
5508
5509 /* Clear the control byte. */
5510 ahd_outb(ahd, SCB_CONTROL, 0);
5511
5512 /* Set the next pointer */
5513 ahd_outw(ahd, SCB_NEXT, SCB_LIST_NULL);
5514 }
5515 }
5516
5517 static int
5518 ahd_init_scbdata(struct ahd_softc *ahd)
5519 {
5520 struct scb_data *scb_data;
5521 int i;
5522
5523 scb_data = &ahd->scb_data;
5524 TAILQ_INIT(&scb_data->free_scbs);
5525 for (i = 0; i < AHD_NUM_TARGETS * AHD_NUM_LUNS_NONPKT; i++)
5526 LIST_INIT(&scb_data->free_scb_lists[i]);
5527 LIST_INIT(&scb_data->any_dev_free_scb_list);
5528 SLIST_INIT(&scb_data->hscb_maps);
5529 SLIST_INIT(&scb_data->sg_maps);
5530 SLIST_INIT(&scb_data->sense_maps);
5531
5532 /* Determine the number of hardware SCBs and initialize them */
5533 scb_data->maxhscbs = ahd_probe_scbs(ahd);
5534 if (scb_data->maxhscbs == 0) {
5535 printf("%s: No SCB space found\n", ahd_name(ahd));
5536 return (ENXIO);
5537 }
5538
5539 ahd_initialize_hscbs(ahd);
5540
5541 /*
5542 * Create our DMA tags. These tags define the kinds of device
5543 * accessible memory allocations and memory mappings we will
5544 * need to perform during normal operation.
5545 *
5546 * Unless we need to further restrict the allocation, we rely
5547 * on the restrictions of the parent dmat, hence the common
5548 * use of MAXADDR and MAXSIZE.
5549 */
5550
5551 /* DMA tag for our hardware scb structures */
5552 if (ahd_dma_tag_create(ahd, ahd->parent_dmat, /*alignment*/1,
5553 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
5554 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
5555 /*highaddr*/BUS_SPACE_MAXADDR,
5556 /*filter*/NULL, /*filterarg*/NULL,
5557 PAGE_SIZE, /*nsegments*/1,
5558 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
5559 /*flags*/0, &scb_data->hscb_dmat) != 0) {
5560 goto error_exit;
5561 }
5562
5563 scb_data->init_level++;
5564
5565 /* DMA tag for our S/G structures. */
5566 if (ahd_dma_tag_create(ahd, ahd->parent_dmat, /*alignment*/8,
5567 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
5568 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
5569 /*highaddr*/BUS_SPACE_MAXADDR,
5570 /*filter*/NULL, /*filterarg*/NULL,
5571 ahd_sglist_allocsize(ahd), /*nsegments*/1,
5572 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
5573 /*flags*/0, &scb_data->sg_dmat) != 0) {
5574 goto error_exit;
5575 }
5576 #ifdef AHD_DEBUG
5577 if ((ahd_debug & AHD_SHOW_MEMORY) != 0)
5578 printf("%s: ahd_sglist_allocsize = 0x%x\n", ahd_name(ahd),
5579 ahd_sglist_allocsize(ahd));
5580 #endif
5581
5582 scb_data->init_level++;
5583
5584 /* DMA tag for our sense buffers. We allocate in page sized chunks */
5585 if (ahd_dma_tag_create(ahd, ahd->parent_dmat, /*alignment*/1,
5586 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
5587 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
5588 /*highaddr*/BUS_SPACE_MAXADDR,
5589 /*filter*/NULL, /*filterarg*/NULL,
5590 PAGE_SIZE, /*nsegments*/1,
5591 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
5592 /*flags*/0, &scb_data->sense_dmat) != 0) {
5593 goto error_exit;
5594 }
5595
5596 scb_data->init_level++;
5597
5598 /* Perform initial CCB allocation */
5599 ahd_alloc_scbs(ahd);
5600
5601 if (scb_data->numscbs == 0) {
5602 printf("%s: ahd_init_scbdata - "
5603 "Unable to allocate initial scbs\n",
5604 ahd_name(ahd));
5605 goto error_exit;
5606 }
5607
5608 /*
5609 * Note that we were successfull
5610 */
5611 return (0);
5612
5613 error_exit:
5614
5615 return (ENOMEM);
5616 }
5617
5618 static struct scb *
5619 ahd_find_scb_by_tag(struct ahd_softc *ahd, u_int tag)
5620 {
5621 struct scb *scb;
5622
5623 /*
5624 * Look on the pending list.
5625 */
5626 LIST_FOREACH(scb, &ahd->pending_scbs, pending_links) {
5627 if (SCB_GET_TAG(scb) == tag)
5628 return (scb);
5629 }
5630
5631 /*
5632 * Then on all of the collision free lists.
5633 */
5634 TAILQ_FOREACH(scb, &ahd->scb_data.free_scbs, links.tqe) {
5635 struct scb *list_scb;
5636
5637 list_scb = scb;
5638 do {
5639 if (SCB_GET_TAG(list_scb) == tag)
5640 return (list_scb);
5641 list_scb = LIST_NEXT(list_scb, collision_links);
5642 } while (list_scb);
5643 }
5644
5645 /*
5646 * And finally on the generic free list.
5647 */
5648 LIST_FOREACH(scb, &ahd->scb_data.any_dev_free_scb_list, links.le) {
5649 if (SCB_GET_TAG(scb) == tag)
5650 return (scb);
5651 }
5652
5653 return (NULL);
5654 }
5655
5656 static void
5657 ahd_fini_scbdata(struct ahd_softc *ahd)
5658 {
5659 struct scb_data *scb_data;
5660
5661 scb_data = &ahd->scb_data;
5662 if (scb_data == NULL)
5663 return;
5664
5665 switch (scb_data->init_level) {
5666 default:
5667 case 7:
5668 {
5669 struct map_node *sns_map;
5670
5671 while ((sns_map = SLIST_FIRST(&scb_data->sense_maps)) != NULL) {
5672 SLIST_REMOVE_HEAD(&scb_data->sense_maps, links);
5673 ahd_dmamap_unload(ahd, scb_data->sense_dmat,
5674 sns_map->dmamap);
5675 ahd_dmamem_free(ahd, scb_data->sense_dmat,
5676 sns_map->vaddr, sns_map->dmamap);
5677 free(sns_map, M_DEVBUF);
5678 }
5679 ahd_dma_tag_destroy(ahd, scb_data->sense_dmat);
5680 /* FALLTHROUGH */
5681 }
5682 case 6:
5683 {
5684 struct map_node *sg_map;
5685
5686 while ((sg_map = SLIST_FIRST(&scb_data->sg_maps)) != NULL) {
5687 SLIST_REMOVE_HEAD(&scb_data->sg_maps, links);
5688 ahd_dmamap_unload(ahd, scb_data->sg_dmat,
5689 sg_map->dmamap);
5690 ahd_dmamem_free(ahd, scb_data->sg_dmat,
5691 sg_map->vaddr, sg_map->dmamap);
5692 free(sg_map, M_DEVBUF);
5693 }
5694 ahd_dma_tag_destroy(ahd, scb_data->sg_dmat);
5695 /* FALLTHROUGH */
5696 }
5697 case 5:
5698 {
5699 struct map_node *hscb_map;
5700
5701 while ((hscb_map = SLIST_FIRST(&scb_data->hscb_maps)) != NULL) {
5702 SLIST_REMOVE_HEAD(&scb_data->hscb_maps, links);
5703 ahd_dmamap_unload(ahd, scb_data->hscb_dmat,
5704 hscb_map->dmamap);
5705 ahd_dmamem_free(ahd, scb_data->hscb_dmat,
5706 hscb_map->vaddr, hscb_map->dmamap);
5707 free(hscb_map, M_DEVBUF);
5708 }
5709 ahd_dma_tag_destroy(ahd, scb_data->hscb_dmat);
5710 /* FALLTHROUGH */
5711 }
5712 case 4:
5713 case 3:
5714 case 2:
5715 case 1:
5716 case 0:
5717 break;
5718 }
5719 }
5720
5721 /*
5722 * DSP filter Bypass must be enabled until the first selection
5723 * after a change in bus mode (Razor #491 and #493).
5724 */
5725 static void
5726 ahd_setup_iocell_workaround(struct ahd_softc *ahd)
5727 {
5728 ahd_mode_state saved_modes;
5729
5730 saved_modes = ahd_save_modes(ahd);
5731 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
5732 ahd_outb(ahd, DSPDATACTL, ahd_inb(ahd, DSPDATACTL)
5733 | BYPASSENAB | RCVROFFSTDIS | XMITOFFSTDIS);
5734 ahd_outb(ahd, SIMODE0, ahd_inb(ahd, SIMODE0) | (ENSELDO|ENSELDI));
5735 #ifdef AHD_DEBUG
5736 if ((ahd_debug & AHD_SHOW_MISC) != 0)
5737 printf("%s: Setting up iocell workaround\n", ahd_name(ahd));
5738 #endif
5739 ahd_restore_modes(ahd, saved_modes);
5740 ahd->flags &= ~AHD_HAD_FIRST_SEL;
5741 }
5742
5743 static void
5744 ahd_iocell_first_selection(struct ahd_softc *ahd)
5745 {
5746 ahd_mode_state saved_modes;
5747 u_int sblkctl;
5748
5749 if ((ahd->flags & AHD_HAD_FIRST_SEL) != 0)
5750 return;
5751 saved_modes = ahd_save_modes(ahd);
5752 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
5753 sblkctl = ahd_inb(ahd, SBLKCTL);
5754 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
5755 #ifdef AHD_DEBUG
5756 if ((ahd_debug & AHD_SHOW_MISC) != 0)
5757 printf("%s: iocell first selection\n", ahd_name(ahd));
5758 #endif
5759 if ((sblkctl & ENAB40) != 0) {
5760 ahd_outb(ahd, DSPDATACTL,
5761 ahd_inb(ahd, DSPDATACTL) & ~BYPASSENAB);
5762 #ifdef AHD_DEBUG
5763 if ((ahd_debug & AHD_SHOW_MISC) != 0)
5764 printf("%s: BYPASS now disabled\n", ahd_name(ahd));
5765 #endif
5766 }
5767 ahd_outb(ahd, SIMODE0, ahd_inb(ahd, SIMODE0) & ~(ENSELDO|ENSELDI));
5768 ahd_outb(ahd, CLRINT, CLRSCSIINT);
5769 ahd_restore_modes(ahd, saved_modes);
5770 ahd->flags |= AHD_HAD_FIRST_SEL;
5771 }
5772
5773 /*************************** SCB Management ***********************************/
5774 static void
5775 ahd_add_col_list(struct ahd_softc *ahd, struct scb *scb, u_int col_idx)
5776 {
5777 struct scb_list *free_list;
5778 struct scb_tailq *free_tailq;
5779 struct scb *first_scb;
5780
5781 scb->flags |= SCB_ON_COL_LIST;
5782 AHD_SET_SCB_COL_IDX(scb, col_idx);
5783 free_list = &ahd->scb_data.free_scb_lists[col_idx];
5784 free_tailq = &ahd->scb_data.free_scbs;
5785 first_scb = LIST_FIRST(free_list);
5786 if (first_scb != NULL) {
5787 LIST_INSERT_AFTER(first_scb, scb, collision_links);
5788 } else {
5789 LIST_INSERT_HEAD(free_list, scb, collision_links);
5790 TAILQ_INSERT_TAIL(free_tailq, scb, links.tqe);
5791 }
5792 }
5793
5794 static void
5795 ahd_rem_col_list(struct ahd_softc *ahd, struct scb *scb)
5796 {
5797 struct scb_list *free_list;
5798 struct scb_tailq *free_tailq;
5799 struct scb *first_scb;
5800 u_int col_idx;
5801
5802 scb->flags &= ~SCB_ON_COL_LIST;
5803 col_idx = AHD_GET_SCB_COL_IDX(ahd, scb);
5804 free_list = &ahd->scb_data.free_scb_lists[col_idx];
5805 free_tailq = &ahd->scb_data.free_scbs;
5806 first_scb = LIST_FIRST(free_list);
5807 if (first_scb == scb) {
5808 struct scb *next_scb;
5809
5810 /*
5811 * Maintain order in the collision free
5812 * lists for fairness if this device has
5813 * other colliding tags active.
5814 */
5815 next_scb = LIST_NEXT(scb, collision_links);
5816 if (next_scb != NULL) {
5817 TAILQ_INSERT_AFTER(free_tailq, scb,
5818 next_scb, links.tqe);
5819 }
5820 TAILQ_REMOVE(free_tailq, scb, links.tqe);
5821 }
5822 LIST_REMOVE(scb, collision_links);
5823 }
5824
5825 /*
5826 * Get a free scb. If there are none, see if we can allocate a new SCB.
5827 */
5828 struct scb *
5829 ahd_get_scb(struct ahd_softc *ahd, u_int col_idx)
5830 {
5831 struct scb *scb;
5832 int tries;
5833
5834 tries = 0;
5835 look_again:
5836 TAILQ_FOREACH(scb, &ahd->scb_data.free_scbs, links.tqe) {
5837 if (AHD_GET_SCB_COL_IDX(ahd, scb) != col_idx) {
5838 ahd_rem_col_list(ahd, scb);
5839 goto found;
5840 }
5841 }
5842 if ((scb = LIST_FIRST(&ahd->scb_data.any_dev_free_scb_list)) == NULL) {
5843
5844 if (tries++ != 0)
5845 return (NULL);
5846 ahd_alloc_scbs(ahd);
5847 goto look_again;
5848 }
5849 LIST_REMOVE(scb, links.le);
5850 if (col_idx != AHD_NEVER_COL_IDX
5851 && (scb->col_scb != NULL)
5852 && (scb->col_scb->flags & SCB_ACTIVE) == 0) {
5853 LIST_REMOVE(scb->col_scb, links.le);
5854 ahd_add_col_list(ahd, scb->col_scb, col_idx);
5855 }
5856 found:
5857 scb->flags |= SCB_ACTIVE;
5858 return (scb);
5859 }
5860
5861 /*
5862 * Return an SCB resource to the free list.
5863 */
5864 void
5865 ahd_free_scb(struct ahd_softc *ahd, struct scb *scb)
5866 {
5867
5868 /* Clean up for the next user */
5869 scb->flags = SCB_FLAG_NONE;
5870 scb->hscb->control = 0;
5871 ahd->scb_data.scbindex[SCB_GET_TAG(scb)] = NULL;
5872
5873 if (scb->col_scb == NULL) {
5874
5875 /*
5876 * No collision possible. Just free normally.
5877 */
5878 LIST_INSERT_HEAD(&ahd->scb_data.any_dev_free_scb_list,
5879 scb, links.le);
5880 } else if ((scb->col_scb->flags & SCB_ON_COL_LIST) != 0) {
5881
5882 /*
5883 * The SCB we might have collided with is on
5884 * a free collision list. Put both SCBs on
5885 * the generic list.
5886 */
5887 ahd_rem_col_list(ahd, scb->col_scb);
5888 LIST_INSERT_HEAD(&ahd->scb_data.any_dev_free_scb_list,
5889 scb, links.le);
5890 LIST_INSERT_HEAD(&ahd->scb_data.any_dev_free_scb_list,
5891 scb->col_scb, links.le);
5892 } else if ((scb->col_scb->flags
5893 & (SCB_PACKETIZED|SCB_ACTIVE)) == SCB_ACTIVE
5894 && (scb->col_scb->hscb->control & TAG_ENB) != 0) {
5895
5896 /*
5897 * The SCB we might collide with on the next allocation
5898 * is still active in a non-packetized, tagged, context.
5899 * Put us on the SCB collision list.
5900 */
5901 ahd_add_col_list(ahd, scb,
5902 AHD_GET_SCB_COL_IDX(ahd, scb->col_scb));
5903 } else {
5904 /*
5905 * The SCB we might collide with on the next allocation
5906 * is either active in a packetized context, or free.
5907 * Since we can't collide, put this SCB on the generic
5908 * free list.
5909 */
5910 LIST_INSERT_HEAD(&ahd->scb_data.any_dev_free_scb_list,
5911 scb, links.le);
5912 }
5913
5914 ahd_platform_scb_free(ahd, scb);
5915 }
5916
5917 void
5918 ahd_alloc_scbs(struct ahd_softc *ahd)
5919 {
5920 struct scb_data *scb_data;
5921 struct scb *next_scb;
5922 struct hardware_scb *hscb;
5923 struct map_node *hscb_map;
5924 struct map_node *sg_map;
5925 struct map_node *sense_map;
5926 uint8_t *segs;
5927 uint8_t *sense_data;
5928 dma_addr_t hscb_busaddr;
5929 dma_addr_t sg_busaddr;
5930 dma_addr_t sense_busaddr;
5931 int newcount;
5932 int i;
5933
5934 scb_data = &ahd->scb_data;
5935 if (scb_data->numscbs >= AHD_SCB_MAX_ALLOC)
5936 /* Can't allocate any more */
5937 return;
5938
5939 if (scb_data->scbs_left != 0) {
5940 int offset;
5941
5942 offset = (PAGE_SIZE / sizeof(*hscb)) - scb_data->scbs_left;
5943 hscb_map = SLIST_FIRST(&scb_data->hscb_maps);
5944 hscb = &((struct hardware_scb *)hscb_map->vaddr)[offset];
5945 hscb_busaddr = hscb_map->physaddr + (offset * sizeof(*hscb));
5946 } else {
5947 hscb_map = malloc(sizeof(*hscb_map), M_DEVBUF, M_NOWAIT);
5948
5949 if (hscb_map == NULL)
5950 return;
5951
5952 /* Allocate the next batch of hardware SCBs */
5953 if (ahd_dmamem_alloc(ahd, scb_data->hscb_dmat,
5954 (void **)&hscb_map->vaddr,
5955 BUS_DMA_NOWAIT, &hscb_map->dmamap) != 0) {
5956 free(hscb_map, M_DEVBUF);
5957 return;
5958 }
5959
5960 SLIST_INSERT_HEAD(&scb_data->hscb_maps, hscb_map, links);
5961
5962 ahd_dmamap_load(ahd, scb_data->hscb_dmat, hscb_map->dmamap,
5963 hscb_map->vaddr, PAGE_SIZE, ahd_dmamap_cb,
5964 &hscb_map->physaddr, /*flags*/0);
5965
5966 hscb = (struct hardware_scb *)hscb_map->vaddr;
5967 hscb_busaddr = hscb_map->physaddr;
5968 scb_data->scbs_left = PAGE_SIZE / sizeof(*hscb);
5969 }
5970
5971 if (scb_data->sgs_left != 0) {
5972 int offset;
5973
5974 offset = ((ahd_sglist_allocsize(ahd) / ahd_sglist_size(ahd))
5975 - scb_data->sgs_left) * ahd_sglist_size(ahd);
5976 sg_map = SLIST_FIRST(&scb_data->sg_maps);
5977 segs = sg_map->vaddr + offset;
5978 sg_busaddr = sg_map->physaddr + offset;
5979 } else {
5980 sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
5981
5982 if (sg_map == NULL)
5983 return;
5984
5985 /* Allocate the next batch of S/G lists */
5986 if (ahd_dmamem_alloc(ahd, scb_data->sg_dmat,
5987 (void **)&sg_map->vaddr,
5988 BUS_DMA_NOWAIT, &sg_map->dmamap) != 0) {
5989 free(sg_map, M_DEVBUF);
5990 return;
5991 }
5992
5993 SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links);
5994
5995 ahd_dmamap_load(ahd, scb_data->sg_dmat, sg_map->dmamap,
5996 sg_map->vaddr, ahd_sglist_allocsize(ahd),
5997 ahd_dmamap_cb, &sg_map->physaddr, /*flags*/0);
5998
5999 segs = sg_map->vaddr;
6000 sg_busaddr = sg_map->physaddr;
6001 scb_data->sgs_left =
6002 ahd_sglist_allocsize(ahd) / ahd_sglist_size(ahd);
6003 #ifdef AHD_DEBUG
6004 if (ahd_debug & AHD_SHOW_MEMORY)
6005 printf("Mapped SG data\n");
6006 #endif
6007 }
6008
6009 if (scb_data->sense_left != 0) {
6010 int offset;
6011
6012 offset = PAGE_SIZE - (AHD_SENSE_BUFSIZE * scb_data->sense_left);
6013 sense_map = SLIST_FIRST(&scb_data->sense_maps);
6014 sense_data = sense_map->vaddr + offset;
6015 sense_busaddr = sense_map->physaddr + offset;
6016 } else {
6017 sense_map = malloc(sizeof(*sense_map), M_DEVBUF, M_NOWAIT);
6018
6019 if (sense_map == NULL)
6020 return;
6021
6022 /* Allocate the next batch of sense buffers */
6023 if (ahd_dmamem_alloc(ahd, scb_data->sense_dmat,
6024 (void **)&sense_map->vaddr,
6025 BUS_DMA_NOWAIT, &sense_map->dmamap) != 0) {
6026 free(sense_map, M_DEVBUF);
6027 return;
6028 }
6029
6030 SLIST_INSERT_HEAD(&scb_data->sense_maps, sense_map, links);
6031
6032 ahd_dmamap_load(ahd, scb_data->sense_dmat, sense_map->dmamap,
6033 sense_map->vaddr, PAGE_SIZE, ahd_dmamap_cb,
6034 &sense_map->physaddr, /*flags*/0);
6035
6036 sense_data = sense_map->vaddr;
6037 sense_busaddr = sense_map->physaddr;
6038 scb_data->sense_left = PAGE_SIZE / AHD_SENSE_BUFSIZE;
6039 #ifdef AHD_DEBUG
6040 if (ahd_debug & AHD_SHOW_MEMORY)
6041 printf("Mapped sense data\n");
6042 #endif
6043 }
6044
6045 newcount = MIN(scb_data->sense_left, scb_data->scbs_left);
6046 newcount = MIN(newcount, scb_data->sgs_left);
6047 newcount = MIN(newcount, (AHD_SCB_MAX_ALLOC - scb_data->numscbs));
6048 scb_data->sense_left -= newcount;
6049 scb_data->scbs_left -= newcount;
6050 scb_data->sgs_left -= newcount;
6051 for (i = 0; i < newcount; i++) {
6052 u_int col_tag;
6053
6054 struct scb_platform_data *pdata;
6055 #ifndef __linux__
6056 int error;
6057 #endif
6058 next_scb = (struct scb *)malloc(sizeof(*next_scb),
6059 M_DEVBUF, M_NOWAIT);
6060 if (next_scb == NULL)
6061 break;
6062
6063 pdata = (struct scb_platform_data *)malloc(sizeof(*pdata),
6064 M_DEVBUF, M_NOWAIT);
6065 if (pdata == NULL) {
6066 free(next_scb, M_DEVBUF);
6067 break;
6068 }
6069 next_scb->platform_data = pdata;
6070 next_scb->hscb_map = hscb_map;
6071 next_scb->sg_map = sg_map;
6072 next_scb->sense_map = sense_map;
6073 next_scb->sg_list = segs;
6074 next_scb->sense_data = sense_data;
6075 next_scb->sense_busaddr = sense_busaddr;
6076 memset(hscb, 0, sizeof(*hscb));
6077 next_scb->hscb = hscb;
6078 hscb->hscb_busaddr = ahd_htole32(hscb_busaddr);
6079
6080 /*
6081 * The sequencer always starts with the second entry.
6082 * The first entry is embedded in the scb.
6083 */
6084 next_scb->sg_list_busaddr = sg_busaddr;
6085 if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0)
6086 next_scb->sg_list_busaddr
6087 += sizeof(struct ahd_dma64_seg);
6088 else
6089 next_scb->sg_list_busaddr += sizeof(struct ahd_dma_seg);
6090 next_scb->ahd_softc = ahd;
6091 next_scb->flags = SCB_FLAG_NONE;
6092 #ifndef __linux__
6093 error = ahd_dmamap_create(ahd, ahd->buffer_dmat, /*flags*/0,
6094 &next_scb->dmamap);
6095 if (error != 0) {
6096 free(next_scb, M_DEVBUF);
6097 free(pdata, M_DEVBUF);
6098 break;
6099 }
6100 #endif
6101 next_scb->hscb->tag = ahd_htole16(scb_data->numscbs);
6102 col_tag = scb_data->numscbs ^ 0x100;
6103 next_scb->col_scb = ahd_find_scb_by_tag(ahd, col_tag);
6104 if (next_scb->col_scb != NULL)
6105 next_scb->col_scb->col_scb = next_scb;
6106 ahd_free_scb(ahd, next_scb);
6107 hscb++;
6108 hscb_busaddr += sizeof(*hscb);
6109 segs += ahd_sglist_size(ahd);
6110 sg_busaddr += ahd_sglist_size(ahd);
6111 sense_data += AHD_SENSE_BUFSIZE;
6112 sense_busaddr += AHD_SENSE_BUFSIZE;
6113 scb_data->numscbs++;
6114 }
6115 }
6116
6117 void
6118 ahd_controller_info(struct ahd_softc *ahd, char *buf)
6119 {
6120 const char *speed;
6121 const char *type;
6122 int len;
6123
6124 len = sprintf(buf, "%s: ", ahd_chip_names[ahd->chip & AHD_CHIPID_MASK]);
6125 buf += len;
6126
6127 speed = "Ultra320 ";
6128 if ((ahd->features & AHD_WIDE) != 0) {
6129 type = "Wide ";
6130 } else {
6131 type = "Single ";
6132 }
6133 len = sprintf(buf, "%s%sChannel %c, SCSI Id=%d, ",
6134 speed, type, ahd->channel, ahd->our_id);
6135 buf += len;
6136
6137 sprintf(buf, "%s, %d SCBs", ahd->bus_description,
6138 ahd->scb_data.maxhscbs);
6139 }
6140
6141 static const char *channel_strings[] = {
6142 "Primary Low",
6143 "Primary High",
6144 "Secondary Low",
6145 "Secondary High"
6146 };
6147
6148 static const char *termstat_strings[] = {
6149 "Terminated Correctly",
6150 "Over Terminated",
6151 "Under Terminated",
6152 "Not Configured"
6153 };
6154
6155 /*
6156 * Start the board, ready for normal operation
6157 */
6158 int
6159 ahd_init(struct ahd_softc *ahd)
6160 {
6161 uint8_t *base_vaddr;
6162 uint8_t *next_vaddr;
6163 dma_addr_t next_baddr;
6164 size_t driver_data_size;
6165 int i;
6166 int error;
6167 u_int warn_user;
6168 uint8_t current_sensing;
6169 uint8_t fstat;
6170
6171 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
6172
6173 ahd->stack_size = ahd_probe_stack_size(ahd);
6174 ahd->saved_stack = malloc(ahd->stack_size * sizeof(uint16_t),
6175 M_DEVBUF, M_NOWAIT);
6176 if (ahd->saved_stack == NULL)
6177 return (ENOMEM);
6178
6179 /*
6180 * Verify that the compiler hasn't over-agressively
6181 * padded important structures.
6182 */
6183 if (sizeof(struct hardware_scb) != 64)
6184 panic("Hardware SCB size is incorrect");
6185
6186 #ifdef AHD_DEBUG
6187 if ((ahd_debug & AHD_DEBUG_SEQUENCER) != 0)
6188 ahd->flags |= AHD_SEQUENCER_DEBUG;
6189 #endif
6190
6191 /*
6192 * Default to allowing initiator operations.
6193 */
6194 ahd->flags |= AHD_INITIATORROLE;
6195
6196 /*
6197 * Only allow target mode features if this unit has them enabled.
6198 */
6199 if ((AHD_TMODE_ENABLE & (0x1 << ahd->unit)) == 0)
6200 ahd->features &= ~AHD_TARGETMODE;
6201
6202 #ifndef __linux__
6203 /* DMA tag for mapping buffers into device visible space. */
6204 if (ahd_dma_tag_create(ahd, ahd->parent_dmat, /*alignment*/1,
6205 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
6206 /*lowaddr*/ahd->flags & AHD_39BIT_ADDRESSING
6207 ? (dma_addr_t)0x7FFFFFFFFFULL
6208 : BUS_SPACE_MAXADDR_32BIT,
6209 /*highaddr*/BUS_SPACE_MAXADDR,
6210 /*filter*/NULL, /*filterarg*/NULL,
6211 /*maxsize*/(AHD_NSEG - 1) * PAGE_SIZE,
6212 /*nsegments*/AHD_NSEG,
6213 /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
6214 /*flags*/BUS_DMA_ALLOCNOW,
6215 &ahd->buffer_dmat) != 0) {
6216 return (ENOMEM);
6217 }
6218 #endif
6219
6220 ahd->init_level++;
6221
6222 /*
6223 * DMA tag for our command fifos and other data in system memory
6224 * the card's sequencer must be able to access. For initiator
6225 * roles, we need to allocate space for the qoutfifo. When providing
6226 * for the target mode role, we must additionally provide space for
6227 * the incoming target command fifo.
6228 */
6229 driver_data_size = AHD_SCB_MAX * sizeof(uint16_t)
6230 + sizeof(struct hardware_scb);
6231 if ((ahd->features & AHD_TARGETMODE) != 0)
6232 driver_data_size += AHD_TMODE_CMDS * sizeof(struct target_cmd);
6233 if ((ahd->bugs & AHD_PKT_BITBUCKET_BUG) != 0)
6234 driver_data_size += PKT_OVERRUN_BUFSIZE;
6235 if (ahd_dma_tag_create(ahd, ahd->parent_dmat, /*alignment*/1,
6236 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
6237 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
6238 /*highaddr*/BUS_SPACE_MAXADDR,
6239 /*filter*/NULL, /*filterarg*/NULL,
6240 driver_data_size,
6241 /*nsegments*/1,
6242 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
6243 /*flags*/0, &ahd->shared_data_dmat) != 0) {
6244 return (ENOMEM);
6245 }
6246
6247 ahd->init_level++;
6248
6249 /* Allocation of driver data */
6250 if (ahd_dmamem_alloc(ahd, ahd->shared_data_dmat,
6251 (void **)&base_vaddr,
6252 BUS_DMA_NOWAIT, &ahd->shared_data_dmamap) != 0) {
6253 return (ENOMEM);
6254 }
6255
6256 ahd->init_level++;
6257
6258 /* And permanently map it in */
6259 ahd_dmamap_load(ahd, ahd->shared_data_dmat, ahd->shared_data_dmamap,
6260 base_vaddr, driver_data_size, ahd_dmamap_cb,
6261 &ahd->shared_data_busaddr, /*flags*/0);
6262 ahd->qoutfifo = (uint16_t *)base_vaddr;
6263 next_vaddr = (uint8_t *)&ahd->qoutfifo[AHD_QOUT_SIZE];
6264 next_baddr = ahd->shared_data_busaddr + AHD_QOUT_SIZE*sizeof(uint16_t);
6265 if ((ahd->features & AHD_TARGETMODE) != 0) {
6266 ahd->targetcmds = (struct target_cmd *)next_vaddr;
6267 next_vaddr += AHD_TMODE_CMDS * sizeof(struct target_cmd);
6268 next_baddr += AHD_TMODE_CMDS * sizeof(struct target_cmd);
6269 }
6270
6271 if ((ahd->bugs & AHD_PKT_BITBUCKET_BUG) != 0) {
6272 ahd->overrun_buf = next_vaddr;
6273 next_vaddr += PKT_OVERRUN_BUFSIZE;
6274 next_baddr += PKT_OVERRUN_BUFSIZE;
6275 }
6276
6277 /*
6278 * We need one SCB to serve as the "next SCB". Since the
6279 * tag identifier in this SCB will never be used, there is
6280 * no point in using a valid HSCB tag from an SCB pulled from
6281 * the standard free pool. So, we allocate this "sentinel"
6282 * specially from the DMA safe memory chunk used for the QOUTFIFO.
6283 */
6284 ahd->next_queued_hscb = (struct hardware_scb *)next_vaddr;
6285 ahd->next_queued_hscb->hscb_busaddr = ahd_htole32(next_baddr);
6286
6287 ahd->init_level++;
6288
6289 /* Allocate SCB data now that buffer_dmat is initialized */
6290 if (ahd_init_scbdata(ahd) != 0)
6291 return (ENOMEM);
6292
6293 if ((ahd->flags & AHD_INITIATORROLE) == 0)
6294 ahd->flags &= ~AHD_RESET_BUS_A;
6295
6296 /*
6297 * Before committing these settings to the chip, give
6298 * the OSM one last chance to modify our configuration.
6299 */
6300 ahd_platform_init(ahd);
6301
6302 /* Bring up the chip. */
6303 ahd_chip_init(ahd);
6304
6305 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
6306
6307 if ((ahd->flags & AHD_CURRENT_SENSING) == 0)
6308 goto init_done;
6309
6310 /*
6311 * Verify termination based on current draw and
6312 * warn user if the bus is over/under terminated.
6313 */
6314 error = ahd_write_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL,
6315 CURSENSE_ENB);
6316 if (error != 0) {
6317 printf("%s: current sensing timeout 1\n", ahd_name(ahd));
6318 goto init_done;
6319 }
6320 for (i = 20, fstat = FLX_FSTAT_BUSY;
6321 (fstat & FLX_FSTAT_BUSY) != 0 && i; i--) {
6322 error = ahd_read_flexport(ahd, FLXADDR_FLEXSTAT, &fstat);
6323 if (error != 0) {
6324 printf("%s: current sensing timeout 2\n",
6325 ahd_name(ahd));
6326 goto init_done;
6327 }
6328 }
6329 if (i == 0) {
6330 printf("%s: Timedout during current-sensing test\n",
6331 ahd_name(ahd));
6332 goto init_done;
6333 }
6334
6335 /* Latch Current Sensing status. */
6336 error = ahd_read_flexport(ahd, FLXADDR_CURRENT_STAT, &current_sensing);
6337 if (error != 0) {
6338 printf("%s: current sensing timeout 3\n", ahd_name(ahd));
6339 goto init_done;
6340 }
6341
6342 /* Diable current sensing. */
6343 ahd_write_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL, 0);
6344
6345 #ifdef AHD_DEBUG
6346 if ((ahd_debug & AHD_SHOW_TERMCTL) != 0) {
6347 printf("%s: current_sensing == 0x%x\n",
6348 ahd_name(ahd), current_sensing);
6349 }
6350 #endif
6351 warn_user = 0;
6352 for (i = 0; i < 4; i++, current_sensing >>= FLX_CSTAT_SHIFT) {
6353 u_int term_stat;
6354
6355 term_stat = (current_sensing & FLX_CSTAT_MASK);
6356 switch (term_stat) {
6357 case FLX_CSTAT_OVER:
6358 case FLX_CSTAT_UNDER:
6359 warn_user++;
6360 case FLX_CSTAT_INVALID:
6361 case FLX_CSTAT_OKAY:
6362 if (warn_user == 0 && bootverbose == 0)
6363 break;
6364 printf("%s: %s Channel %s\n", ahd_name(ahd),
6365 channel_strings[i], termstat_strings[term_stat]);
6366 break;
6367 }
6368 }
6369 if (warn_user) {
6370 printf("%s: WARNING. Termination is not configured correctly.\n"
6371 "%s: WARNING. SCSI bus operations may FAIL.\n",
6372 ahd_name(ahd), ahd_name(ahd));
6373 }
6374 init_done:
6375 ahd_restart(ahd);
6376 ahd_timer_reset(&ahd->stat_timer, AHD_STAT_UPDATE_US,
6377 ahd_stat_timer, ahd);
6378 return (0);
6379 }
6380
6381 /*
6382 * (Re)initialize chip state after a chip reset.
6383 */
6384 static void
6385 ahd_chip_init(struct ahd_softc *ahd)
6386 {
6387 uint32_t busaddr;
6388 u_int sxfrctl1;
6389 u_int scsiseq_template;
6390 u_int wait;
6391 u_int i;
6392 u_int target;
6393
6394 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
6395 /*
6396 * Take the LED out of diagnostic mode
6397 */
6398 ahd_outb(ahd, SBLKCTL, ahd_inb(ahd, SBLKCTL) & ~(DIAGLEDEN|DIAGLEDON));
6399
6400 /*
6401 * Return HS_MAILBOX to its default value.
6402 */
6403 ahd->hs_mailbox = 0;
6404 ahd_outb(ahd, HS_MAILBOX, 0);
6405
6406 /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1. */
6407 ahd_outb(ahd, IOWNID, ahd->our_id);
6408 ahd_outb(ahd, TOWNID, ahd->our_id);
6409 sxfrctl1 = (ahd->flags & AHD_TERM_ENB_A) != 0 ? STPWEN : 0;
6410 sxfrctl1 |= (ahd->flags & AHD_SPCHK_ENB_A) != 0 ? ENSPCHK : 0;
6411 if ((ahd->bugs & AHD_LONG_SETIMO_BUG)
6412 && (ahd->seltime != STIMESEL_MIN)) {
6413 /*
6414 * The selection timer duration is twice as long
6415 * as it should be. Halve it by adding "1" to
6416 * the user specified setting.
6417 */
6418 sxfrctl1 |= ahd->seltime + STIMESEL_BUG_ADJ;
6419 } else {
6420 sxfrctl1 |= ahd->seltime;
6421 }
6422
6423 ahd_outb(ahd, SXFRCTL0, DFON);
6424 ahd_outb(ahd, SXFRCTL1, sxfrctl1|ahd->seltime|ENSTIMER|ACTNEGEN);
6425 ahd_outb(ahd, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
6426
6427 /*
6428 * Now that termination is set, wait for up
6429 * to 500ms for our transceivers to settle. If
6430 * the adapter does not have a cable attached,
6431 * the transceivers may never settle, so don't
6432 * complain if we fail here.
6433 */
6434 for (wait = 10000;
6435 (ahd_inb(ahd, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait;
6436 wait--)
6437 ahd_delay(100);
6438
6439 /* Clear any false bus resets due to the transceivers settling */
6440 ahd_outb(ahd, CLRSINT1, CLRSCSIRSTI);
6441 ahd_outb(ahd, CLRINT, CLRSCSIINT);
6442
6443 /* Initialize mode specific S/G state. */
6444 for (i = 0; i < 2; i++) {
6445 ahd_set_modes(ahd, AHD_MODE_DFF0 + i, AHD_MODE_DFF0 + i);
6446 ahd_outb(ahd, LONGJMP_ADDR + 1, INVALID_ADDR);
6447 ahd_outb(ahd, SG_STATE, 0);
6448 ahd_outb(ahd, CLRSEQINTSRC, 0xFF);
6449 ahd_outb(ahd, SEQIMODE,
6450 ENSAVEPTRS|ENCFG4DATA|ENCFG4ISTAT
6451 |ENCFG4TSTAT|ENCFG4ICMD|ENCFG4TCMD);
6452 }
6453
6454 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
6455 ahd_outb(ahd, DSCOMMAND0, ahd_inb(ahd, DSCOMMAND0)|MPARCKEN|CACHETHEN);
6456 ahd_outb(ahd, DFF_THRSH, RD_DFTHRSH_75|WR_DFTHRSH_75);
6457 ahd_outb(ahd, SIMODE0, ENIOERR|ENOVERRUN);
6458 ahd_outb(ahd, SIMODE3, ENNTRAMPERR|ENOSRAMPERR);
6459 if ((ahd->bugs & AHD_BUSFREEREV_BUG) != 0) {
6460 ahd_outb(ahd, OPTIONMODE, AUTOACKEN|AUTO_MSGOUT_DE);
6461 } else {
6462 ahd_outb(ahd, OPTIONMODE, AUTOACKEN|BUSFREEREV|AUTO_MSGOUT_DE);
6463 }
6464 ahd_outb(ahd, SCSCHKN, CURRFIFODEF|WIDERESEN|SHVALIDSTDIS);
6465 if ((ahd->chip & AHD_BUS_MASK) == AHD_PCIX)
6466 /*
6467 * Do not issue a target abort when a split completion
6468 * error occurs. Let our PCIX interrupt handler deal
6469 * with it instead. H2A4 Razor #625
6470 */
6471 ahd_outb(ahd, PCIXCTL, ahd_inb(ahd, PCIXCTL) | SPLTSTADIS);
6472
6473 if ((ahd->bugs & AHD_LQOOVERRUN_BUG) != 0)
6474 ahd_outb(ahd, LQOSCSCTL, LQONOCHKOVER);
6475
6476 /*
6477 * Tweak IOCELL settings.
6478 */
6479 if ((ahd->flags & AHD_HP_BOARD) != 0) {
6480 for (i = 0; i < NUMDSPS; i++) {
6481 ahd_outb(ahd, DSPSELECT, i);
6482 ahd_outb(ahd, WRTBIASCTL, WRTBIASCTL_HP_DEFAULT);
6483 }
6484 #ifdef AHD_DEBUG
6485 if ((ahd_debug & AHD_SHOW_MISC) != 0)
6486 printf("%s: WRTBIASCTL now 0x%x\n", ahd_name(ahd),
6487 WRTBIASCTL_HP_DEFAULT);
6488 #endif
6489 }
6490 ahd_setup_iocell_workaround(ahd);
6491
6492 /*
6493 * Enable LQI Manager interrupts.
6494 */
6495 ahd_outb(ahd, LQIMODE1, ENLQIPHASE_LQ|ENLQIPHASE_NLQ|ENLIQABORT
6496 | ENLQICRCI_LQ|ENLQICRCI_NLQ|ENLQIBADLQI
6497 | ENLQIOVERI_LQ|ENLQIOVERI_NLQ);
6498 ahd_outb(ahd, LQOMODE0, ENLQOATNLQ|ENLQOATNPKT|ENLQOTCRC);
6499 /*
6500 * An interrupt from LQOBUSFREE is made redundant by the
6501 * BUSFREE interrupt. We choose to have the sequencer catch
6502 * LQOPHCHGINPKT errors manually for the command phase at the
6503 * start of a packetized selection case.
6504 ahd_outb(ahd, LQOMODE1, ENLQOBUSFREE|ENLQOPHACHGINPKT);
6505 */
6506 ahd_outb(ahd, LQOMODE1, 0);
6507
6508 /*
6509 * Setup sequencer interrupt handlers.
6510 */
6511 ahd_outw(ahd, INTVEC1_ADDR, ahd_resolve_seqaddr(ahd, LABEL_seq_isr));
6512 ahd_outw(ahd, INTVEC2_ADDR, ahd_resolve_seqaddr(ahd, LABEL_timer_isr));
6513
6514 /*
6515 * Setup SCB Offset registers.
6516 */
6517 if ((ahd->bugs & AHD_PKT_LUN_BUG) != 0) {
6518 ahd_outb(ahd, LUNPTR, offsetof(struct hardware_scb,
6519 pkt_long_lun));
6520 } else {
6521 ahd_outb(ahd, LUNPTR, offsetof(struct hardware_scb, lun));
6522 }
6523 ahd_outb(ahd, CMDLENPTR, offsetof(struct hardware_scb, cdb_len));
6524 ahd_outb(ahd, ATTRPTR, offsetof(struct hardware_scb, task_attribute));
6525 ahd_outb(ahd, FLAGPTR, offsetof(struct hardware_scb, task_management));
6526 ahd_outb(ahd, CMDPTR, offsetof(struct hardware_scb,
6527 shared_data.idata.cdb));
6528 ahd_outb(ahd, QNEXTPTR,
6529 offsetof(struct hardware_scb, next_hscb_busaddr));
6530 ahd_outb(ahd, ABRTBITPTR, MK_MESSAGE_BIT_OFFSET);
6531 ahd_outb(ahd, ABRTBYTEPTR, offsetof(struct hardware_scb, control));
6532 if ((ahd->bugs & AHD_PKT_LUN_BUG) != 0) {
6533 ahd_outb(ahd, LUNLEN,
6534 sizeof(ahd->next_queued_hscb->pkt_long_lun) - 1);
6535 } else {
6536 ahd_outb(ahd, LUNLEN, LUNLEN_SINGLE_LEVEL_LUN);
6537 }
6538 ahd_outb(ahd, CDBLIMIT, SCB_CDB_LEN_PTR - 1);
6539 ahd_outb(ahd, MAXCMD, 0xFF);
6540 ahd_outb(ahd, SCBAUTOPTR,
6541 AUSCBPTR_EN | offsetof(struct hardware_scb, tag));
6542
6543 /* We haven't been enabled for target mode yet. */
6544 ahd_outb(ahd, MULTARGID, 0);
6545 ahd_outb(ahd, MULTARGID + 1, 0);
6546
6547 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
6548 /* Initialize the negotiation table. */
6549 if ((ahd->features & AHD_NEW_IOCELL_OPTS) == 0) {
6550 /*
6551 * Clear the spare bytes in the neg table to avoid
6552 * spurious parity errors.
6553 */
6554 for (target = 0; target < AHD_NUM_TARGETS; target++) {
6555 ahd_outb(ahd, NEGOADDR, target);
6556 ahd_outb(ahd, ANNEXCOL, AHD_ANNEXCOL_PER_DEV0);
6557 for (i = 0; i < AHD_NUM_PER_DEV_ANNEXCOLS; i++)
6558 ahd_outb(ahd, ANNEXDAT, 0);
6559 }
6560 }
6561 for (target = 0; target < AHD_NUM_TARGETS; target++) {
6562 struct ahd_devinfo devinfo;
6563 struct ahd_initiator_tinfo *tinfo;
6564 struct ahd_tmode_tstate *tstate;
6565
6566 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
6567 target, &tstate);
6568 ahd_compile_devinfo(&devinfo, ahd->our_id,
6569 target, CAM_LUN_WILDCARD,
6570 'A', ROLE_INITIATOR);
6571 ahd_update_neg_table(ahd, &devinfo, &tinfo->curr);
6572 }
6573
6574 ahd_outb(ahd, CLRSINT3, NTRAMPERR|OSRAMPERR);
6575 ahd_outb(ahd, CLRINT, CLRSCSIINT);
6576
6577 #ifdef NEEDS_MORE_TESTING
6578 /*
6579 * Always enable abort on incoming L_Qs if this feature is
6580 * supported. We use this to catch invalid SCB references.
6581 */
6582 if ((ahd->bugs & AHD_ABORT_LQI_BUG) == 0)
6583 ahd_outb(ahd, LQCTL1, ABORTPENDING);
6584 else
6585 #endif
6586 ahd_outb(ahd, LQCTL1, 0);
6587
6588 /* All of our queues are empty */
6589 ahd->qoutfifonext = 0;
6590 ahd->qoutfifonext_valid_tag = QOUTFIFO_ENTRY_VALID_LE;
6591 ahd_outb(ahd, QOUTFIFO_ENTRY_VALID_TAG, QOUTFIFO_ENTRY_VALID >> 8);
6592 for (i = 0; i < AHD_QOUT_SIZE; i++)
6593 ahd->qoutfifo[i] = 0;
6594 ahd_sync_qoutfifo(ahd, BUS_DMASYNC_PREREAD);
6595
6596 ahd->qinfifonext = 0;
6597 for (i = 0; i < AHD_QIN_SIZE; i++)
6598 ahd->qinfifo[i] = SCB_LIST_NULL;
6599
6600 if ((ahd->features & AHD_TARGETMODE) != 0) {
6601 /* All target command blocks start out invalid. */
6602 for (i = 0; i < AHD_TMODE_CMDS; i++)
6603 ahd->targetcmds[i].cmd_valid = 0;
6604 ahd_sync_tqinfifo(ahd, BUS_DMASYNC_PREREAD);
6605 ahd->tqinfifonext = 1;
6606 ahd_outb(ahd, KERNEL_TQINPOS, ahd->tqinfifonext - 1);
6607 ahd_outb(ahd, TQINPOS, ahd->tqinfifonext);
6608 }
6609
6610 /* Initialize Scratch Ram. */
6611 ahd_outb(ahd, SEQ_FLAGS, 0);
6612 ahd_outb(ahd, SEQ_FLAGS2, 0);
6613
6614 /* We don't have any waiting selections */
6615 ahd_outw(ahd, WAITING_TID_HEAD, SCB_LIST_NULL);
6616 ahd_outw(ahd, WAITING_TID_TAIL, SCB_LIST_NULL);
6617 for (i = 0; i < AHD_NUM_TARGETS; i++)
6618 ahd_outw(ahd, WAITING_SCB_TAILS + (2 * i), SCB_LIST_NULL);
6619
6620 /*
6621 * Nobody is waiting to be DMAed into the QOUTFIFO.
6622 */
6623 ahd_outw(ahd, COMPLETE_SCB_HEAD, SCB_LIST_NULL);
6624 ahd_outw(ahd, COMPLETE_SCB_DMAINPROG_HEAD, SCB_LIST_NULL);
6625 ahd_outw(ahd, COMPLETE_DMA_SCB_HEAD, SCB_LIST_NULL);
6626
6627 /*
6628 * The Freeze Count is 0.
6629 */
6630 ahd_outw(ahd, QFREEZE_COUNT, 0);
6631
6632 /*
6633 * Tell the sequencer where it can find our arrays in memory.
6634 */
6635 busaddr = ahd->shared_data_busaddr;
6636 ahd_outb(ahd, SHARED_DATA_ADDR, busaddr & 0xFF);
6637 ahd_outb(ahd, SHARED_DATA_ADDR + 1, (busaddr >> 8) & 0xFF);
6638 ahd_outb(ahd, SHARED_DATA_ADDR + 2, (busaddr >> 16) & 0xFF);
6639 ahd_outb(ahd, SHARED_DATA_ADDR + 3, (busaddr >> 24) & 0xFF);
6640 ahd_outb(ahd, QOUTFIFO_NEXT_ADDR, busaddr & 0xFF);
6641 ahd_outb(ahd, QOUTFIFO_NEXT_ADDR + 1, (busaddr >> 8) & 0xFF);
6642 ahd_outb(ahd, QOUTFIFO_NEXT_ADDR + 2, (busaddr >> 16) & 0xFF);
6643 ahd_outb(ahd, QOUTFIFO_NEXT_ADDR + 3, (busaddr >> 24) & 0xFF);
6644
6645 /*
6646 * Setup the allowed SCSI Sequences based on operational mode.
6647 * If we are a target, we'll enable select in operations once
6648 * we've had a lun enabled.
6649 */
6650 scsiseq_template = ENAUTOATNP;
6651 if ((ahd->flags & AHD_INITIATORROLE) != 0)
6652 scsiseq_template |= ENRSELI;
6653 ahd_outb(ahd, SCSISEQ_TEMPLATE, scsiseq_template);
6654
6655 /* There are no busy SCBs yet. */
6656 for (target = 0; target < AHD_NUM_TARGETS; target++) {
6657 int lun;
6658
6659 for (lun = 0; lun < AHD_NUM_LUNS_NONPKT; lun++)
6660 ahd_unbusy_tcl(ahd, BUILD_TCL_RAW(target, 'A', lun));
6661 }
6662
6663 /*
6664 * Initialize the group code to command length table.
6665 * Vendor Unique codes are set to 0 so we only capture
6666 * the first byte of the cdb. These can be overridden
6667 * when target mode is enabled.
6668 */
6669 ahd_outb(ahd, CMDSIZE_TABLE, 5);
6670 ahd_outb(ahd, CMDSIZE_TABLE + 1, 9);
6671 ahd_outb(ahd, CMDSIZE_TABLE + 2, 9);
6672 ahd_outb(ahd, CMDSIZE_TABLE + 3, 0);
6673 ahd_outb(ahd, CMDSIZE_TABLE + 4, 15);
6674 ahd_outb(ahd, CMDSIZE_TABLE + 5, 11);
6675 ahd_outb(ahd, CMDSIZE_TABLE + 6, 0);
6676 ahd_outb(ahd, CMDSIZE_TABLE + 7, 0);
6677
6678 /* Tell the sequencer of our initial queue positions */
6679 ahd_set_modes(ahd, AHD_MODE_CCHAN, AHD_MODE_CCHAN);
6680 ahd_outb(ahd, QOFF_CTLSTA, SCB_QSIZE_512);
6681 ahd->qinfifonext = 0;
6682 ahd_set_hnscb_qoff(ahd, ahd->qinfifonext);
6683 ahd_set_hescb_qoff(ahd, 0);
6684 ahd_set_snscb_qoff(ahd, 0);
6685 ahd_set_sescb_qoff(ahd, 0);
6686 ahd_set_sdscb_qoff(ahd, 0);
6687
6688 /*
6689 * Tell the sequencer which SCB will be the next one it receives.
6690 */
6691 busaddr = ahd_le32toh(ahd->next_queued_hscb->hscb_busaddr);
6692 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 0, busaddr & 0xFF);
6693 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 1, (busaddr >> 8) & 0xFF);
6694 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 2, (busaddr >> 16) & 0xFF);
6695 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 3, (busaddr >> 24) & 0xFF);
6696
6697 /*
6698 * Default to coalescing disabled.
6699 */
6700 ahd_outw(ahd, INT_COALESCING_CMDCOUNT, 0);
6701 ahd_outw(ahd, CMDS_PENDING, 0);
6702 ahd_update_coalescing_values(ahd, ahd->int_coalescing_timer,
6703 ahd->int_coalescing_maxcmds,
6704 ahd->int_coalescing_mincmds);
6705 ahd_enable_coalescing(ahd, FALSE);
6706
6707 ahd_loadseq(ahd);
6708 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
6709 }
6710
6711 /*
6712 * Setup default device and controller settings.
6713 * This should only be called if our probe has
6714 * determined that no configuration data is available.
6715 */
6716 int
6717 ahd_default_config(struct ahd_softc *ahd)
6718 {
6719 int targ;
6720
6721 ahd->our_id = 7;
6722
6723 /*
6724 * Allocate a tstate to house information for our
6725 * initiator presence on the bus as well as the user
6726 * data for any target mode initiator.
6727 */
6728 if (ahd_alloc_tstate(ahd, ahd->our_id, 'A') == NULL) {
6729 printf("%s: unable to allocate ahd_tmode_tstate. "
6730 "Failing attach\n", ahd_name(ahd));
6731 return (ENOMEM);
6732 }
6733
6734 for (targ = 0; targ < AHD_NUM_TARGETS; targ++) {
6735 struct ahd_devinfo devinfo;
6736 struct ahd_initiator_tinfo *tinfo;
6737 struct ahd_tmode_tstate *tstate;
6738 uint16_t target_mask;
6739
6740 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
6741 targ, &tstate);
6742 /*
6743 * We support SPC2 and SPI4.
6744 */
6745 tinfo->user.protocol_version = 4;
6746 tinfo->user.transport_version = 4;
6747
6748 target_mask = 0x01 << targ;
6749 ahd->user_discenable |= target_mask;
6750 tstate->discenable |= target_mask;
6751 ahd->user_tagenable |= target_mask;
6752 #ifdef AHD_FORCE_160
6753 tinfo->user.period = AHD_SYNCRATE_DT;
6754 #else
6755 tinfo->user.period = AHD_SYNCRATE_160;
6756 #endif
6757 tinfo->user.offset = MAX_OFFSET;
6758 tinfo->user.ppr_options = MSG_EXT_PPR_RD_STRM
6759 | MSG_EXT_PPR_WR_FLOW
6760 | MSG_EXT_PPR_HOLD_MCS
6761 | MSG_EXT_PPR_IU_REQ
6762 | MSG_EXT_PPR_QAS_REQ
6763 | MSG_EXT_PPR_DT_REQ;
6764 if ((ahd->features & AHD_RTI) != 0)
6765 tinfo->user.ppr_options |= MSG_EXT_PPR_RTI;
6766
6767 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT;
6768
6769 /*
6770 * Start out Async/Narrow/Untagged and with
6771 * conservative protocol support.
6772 */
6773 tinfo->goal.protocol_version = 2;
6774 tinfo->goal.transport_version = 2;
6775 tinfo->curr.protocol_version = 2;
6776 tinfo->curr.transport_version = 2;
6777 ahd_compile_devinfo(&devinfo, ahd->our_id,
6778 targ, CAM_LUN_WILDCARD,
6779 'A', ROLE_INITIATOR);
6780 tstate->tagenable &= ~target_mask;
6781 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
6782 AHD_TRANS_CUR|AHD_TRANS_GOAL, /*paused*/TRUE);
6783 ahd_set_syncrate(ahd, &devinfo, /*period*/0, /*offset*/0,
6784 /*ppr_options*/0, AHD_TRANS_CUR|AHD_TRANS_GOAL,
6785 /*paused*/TRUE);
6786 }
6787 return (0);
6788 }
6789
6790 /*
6791 * Parse device configuration information.
6792 */
6793 int
6794 ahd_parse_cfgdata(struct ahd_softc *ahd, struct seeprom_config *sc)
6795 {
6796 int targ;
6797 int max_targ;
6798
6799 max_targ = sc->max_targets & CFMAXTARG;
6800 ahd->our_id = sc->brtime_id & CFSCSIID;
6801
6802 /*
6803 * Allocate a tstate to house information for our
6804 * initiator presence on the bus as well as the user
6805 * data for any target mode initiator.
6806 */
6807 if (ahd_alloc_tstate(ahd, ahd->our_id, 'A') == NULL) {
6808 printf("%s: unable to allocate ahd_tmode_tstate. "
6809 "Failing attach\n", ahd_name(ahd));
6810 return (ENOMEM);
6811 }
6812
6813 for (targ = 0; targ < max_targ; targ++) {
6814 struct ahd_devinfo devinfo;
6815 struct ahd_initiator_tinfo *tinfo;
6816 struct ahd_transinfo *user_tinfo;
6817 struct ahd_tmode_tstate *tstate;
6818 uint16_t target_mask;
6819
6820 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
6821 targ, &tstate);
6822 user_tinfo = &tinfo->user;
6823
6824 /*
6825 * We support SPC2 and SPI4.
6826 */
6827 tinfo->user.protocol_version = 4;
6828 tinfo->user.transport_version = 4;
6829
6830 target_mask = 0x01 << targ;
6831 ahd->user_discenable &= ~target_mask;
6832 tstate->discenable &= ~target_mask;
6833 ahd->user_tagenable &= ~target_mask;
6834 if (sc->device_flags[targ] & CFDISC) {
6835 tstate->discenable |= target_mask;
6836 ahd->user_discenable |= target_mask;
6837 ahd->user_tagenable |= target_mask;
6838 } else {
6839 /*
6840 * Cannot be packetized without disconnection.
6841 */
6842 sc->device_flags[targ] &= ~CFPACKETIZED;
6843 }
6844
6845 user_tinfo->ppr_options = 0;
6846 user_tinfo->period = (sc->device_flags[targ] & CFXFER);
6847 if (user_tinfo->period < CFXFER_ASYNC) {
6848 if (user_tinfo->period <= AHD_PERIOD_10MHz)
6849 user_tinfo->ppr_options |= MSG_EXT_PPR_DT_REQ;
6850 user_tinfo->offset = MAX_OFFSET;
6851 } else {
6852 user_tinfo->offset = 0;
6853 user_tinfo->period = AHD_ASYNC_XFER_PERIOD;
6854 }
6855 #ifdef AHD_FORCE_160
6856 if (user_tinfo->period <= AHD_SYNCRATE_160)
6857 user_tinfo->period = AHD_SYNCRATE_DT;
6858 #endif
6859
6860 if ((sc->device_flags[targ] & CFPACKETIZED) != 0) {
6861 user_tinfo->ppr_options |= MSG_EXT_PPR_RD_STRM
6862 | MSG_EXT_PPR_WR_FLOW
6863 | MSG_EXT_PPR_HOLD_MCS
6864 | MSG_EXT_PPR_IU_REQ;
6865 if ((ahd->features & AHD_RTI) != 0)
6866 user_tinfo->ppr_options |= MSG_EXT_PPR_RTI;
6867 }
6868
6869 if ((sc->device_flags[targ] & CFQAS) != 0)
6870 user_tinfo->ppr_options |= MSG_EXT_PPR_QAS_REQ;
6871
6872 if ((sc->device_flags[targ] & CFWIDEB) != 0)
6873 user_tinfo->width = MSG_EXT_WDTR_BUS_16_BIT;
6874 else
6875 user_tinfo->width = MSG_EXT_WDTR_BUS_8_BIT;
6876 #ifdef AHD_DEBUG
6877 if ((ahd_debug & AHD_SHOW_MISC) != 0)
6878 printf("(%d): %x:%x:%x:%x\n", targ, user_tinfo->width,
6879 user_tinfo->period, user_tinfo->offset,
6880 user_tinfo->ppr_options);
6881 #endif
6882 /*
6883 * Start out Async/Narrow/Untagged and with
6884 * conservative protocol support.
6885 */
6886 tstate->tagenable &= ~target_mask;
6887 tinfo->goal.protocol_version = 2;
6888 tinfo->goal.transport_version = 2;
6889 tinfo->curr.protocol_version = 2;
6890 tinfo->curr.transport_version = 2;
6891 ahd_compile_devinfo(&devinfo, ahd->our_id,
6892 targ, CAM_LUN_WILDCARD,
6893 'A', ROLE_INITIATOR);
6894 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
6895 AHD_TRANS_CUR|AHD_TRANS_GOAL, /*paused*/TRUE);
6896 ahd_set_syncrate(ahd, &devinfo, /*period*/0, /*offset*/0,
6897 /*ppr_options*/0, AHD_TRANS_CUR|AHD_TRANS_GOAL,
6898 /*paused*/TRUE);
6899 }
6900
6901 ahd->flags &= ~AHD_SPCHK_ENB_A;
6902 if (sc->bios_control & CFSPARITY)
6903 ahd->flags |= AHD_SPCHK_ENB_A;
6904
6905 ahd->flags &= ~AHD_RESET_BUS_A;
6906 if (sc->bios_control & CFRESETB)
6907 ahd->flags |= AHD_RESET_BUS_A;
6908
6909 ahd->flags &= ~AHD_EXTENDED_TRANS_A;
6910 if (sc->bios_control & CFEXTEND)
6911 ahd->flags |= AHD_EXTENDED_TRANS_A;
6912
6913 ahd->flags &= ~AHD_BIOS_ENABLED;
6914 if ((sc->bios_control & CFBIOSSTATE) == CFBS_ENABLED)
6915 ahd->flags |= AHD_BIOS_ENABLED;
6916
6917 ahd->flags &= ~AHD_STPWLEVEL_A;
6918 if ((sc->adapter_control & CFSTPWLEVEL) != 0)
6919 ahd->flags |= AHD_STPWLEVEL_A;
6920
6921 return (0);
6922 }
6923
6924 /*
6925 * Parse device configuration information.
6926 */
6927 int
6928 ahd_parse_vpddata(struct ahd_softc *ahd, struct vpd_config *vpd)
6929 {
6930 int error;
6931
6932 error = ahd_verify_vpd_cksum(vpd);
6933 if (error == 0)
6934 return (EINVAL);
6935 if ((vpd->bios_flags & VPDBOOTHOST) != 0)
6936 ahd->flags |= AHD_BOOT_CHANNEL;
6937 return (0);
6938 }
6939
6940 void
6941 ahd_intr_enable(struct ahd_softc *ahd, int enable)
6942 {
6943 u_int hcntrl;
6944
6945 hcntrl = ahd_inb(ahd, HCNTRL);
6946 hcntrl &= ~INTEN;
6947 ahd->pause &= ~INTEN;
6948 ahd->unpause &= ~INTEN;
6949 if (enable) {
6950 hcntrl |= INTEN;
6951 ahd->pause |= INTEN;
6952 ahd->unpause |= INTEN;
6953 }
6954 ahd_outb(ahd, HCNTRL, hcntrl);
6955 }
6956
6957 void
6958 ahd_update_coalescing_values(struct ahd_softc *ahd, u_int timer, u_int maxcmds,
6959 u_int mincmds)
6960 {
6961 if (timer > AHD_TIMER_MAX_US)
6962 timer = AHD_TIMER_MAX_US;
6963 ahd->int_coalescing_timer = timer;
6964
6965 if (maxcmds > AHD_INT_COALESCING_MAXCMDS_MAX)
6966 maxcmds = AHD_INT_COALESCING_MAXCMDS_MAX;
6967 if (mincmds > AHD_INT_COALESCING_MINCMDS_MAX)
6968 mincmds = AHD_INT_COALESCING_MINCMDS_MAX;
6969 ahd->int_coalescing_maxcmds = maxcmds;
6970 ahd_outw(ahd, INT_COALESCING_TIMER, timer / AHD_TIMER_US_PER_TICK);
6971 ahd_outb(ahd, INT_COALESCING_MAXCMDS, -maxcmds);
6972 ahd_outb(ahd, INT_COALESCING_MINCMDS, -mincmds);
6973 }
6974
6975 void
6976 ahd_enable_coalescing(struct ahd_softc *ahd, int enable)
6977 {
6978
6979 ahd->hs_mailbox &= ~ENINT_COALESCE;
6980 if (enable)
6981 ahd->hs_mailbox |= ENINT_COALESCE;
6982 ahd_outb(ahd, HS_MAILBOX, ahd->hs_mailbox);
6983 ahd_flush_device_writes(ahd);
6984 ahd_run_qoutfifo(ahd);
6985 }
6986
6987 /*
6988 * Ensure that the card is paused in a location
6989 * outside of all critical sections and that all
6990 * pending work is completed prior to returning.
6991 * This routine should only be called from outside
6992 * an interrupt context.
6993 */
6994 void
6995 ahd_pause_and_flushwork(struct ahd_softc *ahd)
6996 {
6997 u_int intstat;
6998 u_int maxloops;
6999 u_int qfreeze_cnt;
7000
7001 maxloops = 1000;
7002 ahd->flags |= AHD_ALL_INTERRUPTS;
7003 ahd_pause(ahd);
7004 /*
7005 * Increment the QFreeze Count so that the sequencer
7006 * will not start new selections. We do this only
7007 * until we are safely paused without further selections
7008 * pending.
7009 */
7010 ahd_outw(ahd, QFREEZE_COUNT, ahd_inw(ahd, QFREEZE_COUNT) + 1);
7011 ahd_outb(ahd, SEQ_FLAGS2, ahd_inb(ahd, SEQ_FLAGS2) | SELECTOUT_QFROZEN);
7012 do {
7013 struct scb *waiting_scb;
7014
7015 ahd_unpause(ahd);
7016 ahd_intr(ahd);
7017 ahd_pause(ahd);
7018 ahd_clear_critical_section(ahd);
7019 intstat = ahd_inb(ahd, INTSTAT);
7020 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
7021 if ((ahd_inb(ahd, SSTAT0) & (SELDO|SELINGO)) == 0)
7022 ahd_outb(ahd, SCSISEQ0,
7023 ahd_inb(ahd, SCSISEQ0) & ~ENSELO);
7024 /*
7025 * In the non-packetized case, the sequencer (for Rev A),
7026 * relies on ENSELO remaining set after SELDO. The hardware
7027 * auto-clears ENSELO in the packetized case.
7028 */
7029 waiting_scb = ahd_lookup_scb(ahd,
7030 ahd_inw(ahd, WAITING_TID_HEAD));
7031 if (waiting_scb != NULL
7032 && (waiting_scb->flags & SCB_PACKETIZED) == 0
7033 && (ahd_inb(ahd, SSTAT0) & (SELDO|SELINGO)) != 0)
7034 ahd_outb(ahd, SCSISEQ0,
7035 ahd_inb(ahd, SCSISEQ0) | ENSELO);
7036 } while (--maxloops
7037 && (intstat != 0xFF || (ahd->features & AHD_REMOVABLE) == 0)
7038 && ((intstat & INT_PEND) != 0
7039 || (ahd_inb(ahd, SCSISEQ0) & ENSELO) != 0
7040 || (ahd_inb(ahd, SSTAT0) & (SELDO|SELINGO)) != 0));
7041
7042 if (maxloops == 0) {
7043 printf("Infinite interrupt loop, INTSTAT = %x",
7044 ahd_inb(ahd, INTSTAT));
7045 }
7046 qfreeze_cnt = ahd_inw(ahd, QFREEZE_COUNT);
7047 if (qfreeze_cnt == 0) {
7048 printf("%s: ahd_pause_and_flushwork with 0 qfreeze count!\n",
7049 ahd_name(ahd));
7050 } else {
7051 qfreeze_cnt--;
7052 }
7053 ahd_outw(ahd, QFREEZE_COUNT, qfreeze_cnt);
7054 if (qfreeze_cnt == 0)
7055 ahd_outb(ahd, SEQ_FLAGS2,
7056 ahd_inb(ahd, SEQ_FLAGS2) & ~SELECTOUT_QFROZEN);
7057
7058 ahd_flush_qoutfifo(ahd);
7059
7060 ahd_platform_flushwork(ahd);
7061 ahd->flags &= ~AHD_ALL_INTERRUPTS;
7062 }
7063
7064 int
7065 ahd_suspend(struct ahd_softc *ahd)
7066 {
7067
7068 ahd_pause_and_flushwork(ahd);
7069
7070 if (LIST_FIRST(&ahd->pending_scbs) != NULL) {
7071 ahd_unpause(ahd);
7072 return (EBUSY);
7073 }
7074 ahd_shutdown(ahd);
7075 return (0);
7076 }
7077
7078 int
7079 ahd_resume(struct ahd_softc *ahd)
7080 {
7081
7082 ahd_reset(ahd, /*reinit*/TRUE);
7083 ahd_intr_enable(ahd, TRUE);
7084 ahd_restart(ahd);
7085 return (0);
7086 }
7087
7088 /************************** Busy Target Table *********************************/
7089 /*
7090 * Set SCBPTR to the SCB that contains the busy
7091 * table entry for TCL. Return the offset into
7092 * the SCB that contains the entry for TCL.
7093 * saved_scbid is dereferenced and set to the
7094 * scbid that should be restored once manipualtion
7095 * of the TCL entry is complete.
7096 */
7097 static __inline u_int
7098 ahd_index_busy_tcl(struct ahd_softc *ahd, u_int *saved_scbid, u_int tcl)
7099 {
7100 /*
7101 * Index to the SCB that contains the busy entry.
7102 */
7103 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
7104 *saved_scbid = ahd_get_scbptr(ahd);
7105 ahd_set_scbptr(ahd, TCL_LUN(tcl)
7106 | ((TCL_TARGET_OFFSET(tcl) & 0xC) << 4));
7107
7108 /*
7109 * And now calculate the SCB offset to the entry.
7110 * Each entry is 2 bytes wide, hence the
7111 * multiplication by 2.
7112 */
7113 return (((TCL_TARGET_OFFSET(tcl) & 0x3) << 1) + SCB_DISCONNECTED_LISTS);
7114 }
7115
7116 /*
7117 * Return the untagged transaction id for a given target/channel lun.
7118 */
7119 u_int
7120 ahd_find_busy_tcl(struct ahd_softc *ahd, u_int tcl)
7121 {
7122 u_int scbid;
7123 u_int scb_offset;
7124 u_int saved_scbptr;
7125
7126 scb_offset = ahd_index_busy_tcl(ahd, &saved_scbptr, tcl);
7127 scbid = ahd_inw_scbram(ahd, scb_offset);
7128 ahd_set_scbptr(ahd, saved_scbptr);
7129 return (scbid);
7130 }
7131
7132 void
7133 ahd_busy_tcl(struct ahd_softc *ahd, u_int tcl, u_int scbid)
7134 {
7135 u_int scb_offset;
7136 u_int saved_scbptr;
7137
7138 scb_offset = ahd_index_busy_tcl(ahd, &saved_scbptr, tcl);
7139 ahd_outw(ahd, scb_offset, scbid);
7140 ahd_set_scbptr(ahd, saved_scbptr);
7141 }
7142
7143 /************************** SCB and SCB queue management **********************/
7144 int
7145 ahd_match_scb(struct ahd_softc *ahd, struct scb *scb, int target,
7146 char channel, int lun, u_int tag, role_t role)
7147 {
7148 int targ = SCB_GET_TARGET(ahd, scb);
7149 char chan = SCB_GET_CHANNEL(ahd, scb);
7150 int slun = SCB_GET_LUN(scb);
7151 int match;
7152
7153 match = ((chan == channel) || (channel == ALL_CHANNELS));
7154 if (match != 0)
7155 match = ((targ == target) || (target == CAM_TARGET_WILDCARD));
7156 if (match != 0)
7157 match = ((lun == slun) || (lun == CAM_LUN_WILDCARD));
7158 if (match != 0) {
7159 #ifdef AHD_TARGET_MODE
7160 int group;
7161
7162 group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code);
7163 if (role == ROLE_INITIATOR) {
7164 match = (group != XPT_FC_GROUP_TMODE)
7165 && ((tag == SCB_GET_TAG(scb))
7166 || (tag == SCB_LIST_NULL));
7167 } else if (role == ROLE_TARGET) {
7168 match = (group == XPT_FC_GROUP_TMODE)
7169 && ((tag == scb->io_ctx->csio.tag_id)
7170 || (tag == SCB_LIST_NULL));
7171 }
7172 #else /* !AHD_TARGET_MODE */
7173 match = ((tag == SCB_GET_TAG(scb)) || (tag == SCB_LIST_NULL));
7174 #endif /* AHD_TARGET_MODE */
7175 }
7176
7177 return match;
7178 }
7179
7180 void
7181 ahd_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
7182 {
7183 int target;
7184 char channel;
7185 int lun;
7186
7187 target = SCB_GET_TARGET(ahd, scb);
7188 lun = SCB_GET_LUN(scb);
7189 channel = SCB_GET_CHANNEL(ahd, scb);
7190
7191 ahd_search_qinfifo(ahd, target, channel, lun,
7192 /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN,
7193 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
7194
7195 ahd_platform_freeze_devq(ahd, scb);
7196 }
7197
7198 void
7199 ahd_qinfifo_requeue_tail(struct ahd_softc *ahd, struct scb *scb)
7200 {
7201 struct scb *prev_scb;
7202 ahd_mode_state saved_modes;
7203
7204 saved_modes = ahd_save_modes(ahd);
7205 ahd_set_modes(ahd, AHD_MODE_CCHAN, AHD_MODE_CCHAN);
7206 prev_scb = NULL;
7207 if (ahd_qinfifo_count(ahd) != 0) {
7208 u_int prev_tag;
7209 u_int prev_pos;
7210
7211 prev_pos = AHD_QIN_WRAP(ahd->qinfifonext - 1);
7212 prev_tag = ahd->qinfifo[prev_pos];
7213 prev_scb = ahd_lookup_scb(ahd, prev_tag);
7214 }
7215 ahd_qinfifo_requeue(ahd, prev_scb, scb);
7216 ahd_set_hnscb_qoff(ahd, ahd->qinfifonext);
7217 ahd_restore_modes(ahd, saved_modes);
7218 }
7219
7220 static void
7221 ahd_qinfifo_requeue(struct ahd_softc *ahd, struct scb *prev_scb,
7222 struct scb *scb)
7223 {
7224 if (prev_scb == NULL) {
7225 uint32_t busaddr;
7226
7227 busaddr = ahd_le32toh(scb->hscb->hscb_busaddr);
7228 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 0, busaddr & 0xFF);
7229 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 1, (busaddr >> 8) & 0xFF);
7230 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 2, (busaddr >> 16) & 0xFF);
7231 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 3, (busaddr >> 24) & 0xFF);
7232 } else {
7233 prev_scb->hscb->next_hscb_busaddr = scb->hscb->hscb_busaddr;
7234 ahd_sync_scb(ahd, prev_scb,
7235 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
7236 }
7237 ahd->qinfifo[AHD_QIN_WRAP(ahd->qinfifonext)] = SCB_GET_TAG(scb);
7238 ahd->qinfifonext++;
7239 scb->hscb->next_hscb_busaddr = ahd->next_queued_hscb->hscb_busaddr;
7240 ahd_sync_scb(ahd, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
7241 }
7242
7243 static int
7244 ahd_qinfifo_count(struct ahd_softc *ahd)
7245 {
7246 u_int qinpos;
7247 u_int wrap_qinpos;
7248 u_int wrap_qinfifonext;
7249
7250 AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
7251 qinpos = ahd_get_snscb_qoff(ahd);
7252 wrap_qinpos = AHD_QIN_WRAP(qinpos);
7253 wrap_qinfifonext = AHD_QIN_WRAP(ahd->qinfifonext);
7254 if (wrap_qinfifonext >= wrap_qinpos)
7255 return (wrap_qinfifonext - wrap_qinpos);
7256 else
7257 return (wrap_qinfifonext
7258 + NUM_ELEMENTS(ahd->qinfifo) - wrap_qinpos);
7259 }
7260
7261 void
7262 ahd_reset_cmds_pending(struct ahd_softc *ahd)
7263 {
7264 struct scb *scb;
7265 ahd_mode_state saved_modes;
7266 u_int pending_cmds;
7267
7268 saved_modes = ahd_save_modes(ahd);
7269 ahd_set_modes(ahd, AHD_MODE_CCHAN, AHD_MODE_CCHAN);
7270
7271 /*
7272 * Don't count any commands as outstanding that the
7273 * sequencer has already marked for completion.
7274 */
7275 ahd_flush_qoutfifo(ahd);
7276
7277 pending_cmds = 0;
7278 LIST_FOREACH(scb, &ahd->pending_scbs, pending_links) {
7279 pending_cmds++;
7280 }
7281 ahd_outw(ahd, CMDS_PENDING, pending_cmds - ahd_qinfifo_count(ahd));
7282 ahd_restore_modes(ahd, saved_modes);
7283 ahd->flags &= ~AHD_UPDATE_PEND_CMDS;
7284 }
7285
7286 int
7287 ahd_search_qinfifo(struct ahd_softc *ahd, int target, char channel,
7288 int lun, u_int tag, role_t role, uint32_t status,
7289 ahd_search_action action)
7290 {
7291 struct scb *scb;
7292 struct scb *prev_scb;
7293 ahd_mode_state saved_modes;
7294 u_int qinstart;
7295 u_int qinpos;
7296 u_int qintail;
7297 u_int tid_next;
7298 u_int tid_prev;
7299 u_int scbid;
7300 u_int savedscbptr;
7301 uint32_t busaddr;
7302 int found;
7303 int targets;
7304
7305 /* Must be in CCHAN mode */
7306 saved_modes = ahd_save_modes(ahd);
7307 ahd_set_modes(ahd, AHD_MODE_CCHAN, AHD_MODE_CCHAN);
7308
7309 /*
7310 * Halt any pending SCB DMA. The sequencer will reinitiate
7311 * this dma if the qinfifo is not empty once we unpause.
7312 */
7313 if ((ahd_inb(ahd, CCSCBCTL) & (CCARREN|CCSCBEN|CCSCBDIR))
7314 == (CCARREN|CCSCBEN|CCSCBDIR)) {
7315 ahd_outb(ahd, CCSCBCTL,
7316 ahd_inb(ahd, CCSCBCTL) & ~(CCARREN|CCSCBEN));
7317 while ((ahd_inb(ahd, CCSCBCTL) & (CCARREN|CCSCBEN)) != 0)
7318 ;
7319 }
7320 /* Determine sequencer's position in the qinfifo. */
7321 qintail = AHD_QIN_WRAP(ahd->qinfifonext);
7322 qinstart = ahd_get_snscb_qoff(ahd);
7323 qinpos = AHD_QIN_WRAP(qinstart);
7324 found = 0;
7325 prev_scb = NULL;
7326
7327 if (action == SEARCH_PRINT) {
7328 printf("qinstart = %d qinfifonext = %d\nQINFIFO:",
7329 qinstart, ahd->qinfifonext);
7330 }
7331
7332 /*
7333 * Start with an empty queue. Entries that are not chosen
7334 * for removal will be re-added to the queue as we go.
7335 */
7336 ahd->qinfifonext = qinstart;
7337 busaddr = ahd_le32toh(ahd->next_queued_hscb->hscb_busaddr);
7338 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 0, busaddr & 0xFF);
7339 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 1, (busaddr >> 8) & 0xFF);
7340 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 2, (busaddr >> 16) & 0xFF);
7341 ahd_outb(ahd, NEXT_QUEUED_SCB_ADDR + 3, (busaddr >> 24) & 0xFF);
7342
7343 while (qinpos != qintail) {
7344 scb = ahd_lookup_scb(ahd, ahd->qinfifo[qinpos]);
7345 if (scb == NULL) {
7346 printf("qinpos = %d, SCB index = %d\n",
7347 qinpos, ahd->qinfifo[qinpos]);
7348 panic("Loop 1\n");
7349 }
7350
7351 if (ahd_match_scb(ahd, scb, target, channel, lun, tag, role)) {
7352 /*
7353 * We found an scb that needs to be acted on.
7354 */
7355 found++;
7356 switch (action) {
7357 case SEARCH_COMPLETE:
7358 {
7359 cam_status ostat;
7360 cam_status cstat;
7361
7362 ostat = ahd_get_transaction_status(scb);
7363 if (ostat == CAM_REQ_INPROG)
7364 ahd_set_transaction_status(scb,
7365 status);
7366 cstat = ahd_get_transaction_status(scb);
7367 if (cstat != CAM_REQ_CMP)
7368 ahd_freeze_scb(scb);
7369 if ((scb->flags & SCB_ACTIVE) == 0)
7370 printf("Inactive SCB in qinfifo\n");
7371 ahd_done(ahd, scb);
7372
7373 /* FALLTHROUGH */
7374 }
7375 case SEARCH_REMOVE:
7376 break;
7377 case SEARCH_PRINT:
7378 printf(" 0x%x", ahd->qinfifo[qinpos]);
7379 /* FALLTHROUGH */
7380 case SEARCH_COUNT:
7381 ahd_qinfifo_requeue(ahd, prev_scb, scb);
7382 prev_scb = scb;
7383 break;
7384 }
7385 } else {
7386 ahd_qinfifo_requeue(ahd, prev_scb, scb);
7387 prev_scb = scb;
7388 }
7389 qinpos = AHD_QIN_WRAP(qinpos+1);
7390 }
7391
7392 ahd_set_hnscb_qoff(ahd, ahd->qinfifonext);
7393
7394 if (action == SEARCH_PRINT)
7395 printf("\nWAITING_TID_QUEUES:\n");
7396
7397 /*
7398 * Search waiting for selection lists. We traverse the
7399 * list of "their ids" waiting for selection and, if
7400 * appropriate, traverse the SCBs of each "their id"
7401 * looking for matches.
7402 */
7403 savedscbptr = ahd_get_scbptr(ahd);
7404 tid_next = ahd_inw(ahd, WAITING_TID_HEAD);
7405 tid_prev = SCB_LIST_NULL;
7406 targets = 0;
7407 for (scbid = tid_next; !SCBID_IS_NULL(scbid); scbid = tid_next) {
7408 u_int tid_head;
7409
7410 /*
7411 * We limit based on the number of SCBs since
7412 * MK_MESSAGE SCBs are not in the per-tid lists.
7413 */
7414 targets++;
7415 if (targets > AHD_SCB_MAX) {
7416 panic("TID LIST LOOP");
7417 }
7418 if (scbid >= ahd->scb_data.numscbs) {
7419 printf("%s: Waiting TID List inconsistency. "
7420 "SCB index == 0x%x, yet numscbs == 0x%x.",
7421 ahd_name(ahd), scbid, ahd->scb_data.numscbs);
7422 ahd_dump_card_state(ahd);
7423 panic("for safety");
7424 }
7425 scb = ahd_lookup_scb(ahd, scbid);
7426 if (scb == NULL) {
7427 printf("%s: SCB = 0x%x Not Active!\n",
7428 ahd_name(ahd), scbid);
7429 panic("Waiting TID List traversal\n");
7430 }
7431 ahd_set_scbptr(ahd, scbid);
7432 tid_next = ahd_inw_scbram(ahd, SCB_NEXT2);
7433 if (ahd_match_scb(ahd, scb, target, channel, CAM_LUN_WILDCARD,
7434 SCB_LIST_NULL, ROLE_UNKNOWN) == 0) {
7435 tid_prev = scbid;
7436 continue;
7437 }
7438
7439 /*
7440 * We found a list of scbs that needs to be searched.
7441 */
7442 if (action == SEARCH_PRINT)
7443 printf(" %d ( ", SCB_GET_TARGET(ahd, scb));
7444 tid_head = scbid;
7445 found += ahd_search_scb_list(ahd, target, channel,
7446 lun, tag, role, status,
7447 action, &tid_head,
7448 SCB_GET_TARGET(ahd, scb));
7449 if (tid_head != scbid)
7450 ahd_stitch_tid_list(ahd, tid_prev, tid_head, tid_next);
7451 if (!SCBID_IS_NULL(tid_head))
7452 tid_prev = tid_head;
7453 if (action == SEARCH_PRINT)
7454 printf(")\n");
7455 }
7456 ahd_set_scbptr(ahd, savedscbptr);
7457 ahd_restore_modes(ahd, saved_modes);
7458 return (found);
7459 }
7460
7461 static int
7462 ahd_search_scb_list(struct ahd_softc *ahd, int target, char channel,
7463 int lun, u_int tag, role_t role, uint32_t status,
7464 ahd_search_action action, u_int *list_head, u_int tid)
7465 {
7466 struct scb *scb;
7467 u_int scbid;
7468 u_int next;
7469 u_int prev;
7470 int found;
7471
7472 AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
7473 found = 0;
7474 prev = SCB_LIST_NULL;
7475 next = *list_head;
7476 for (scbid = next; !SCBID_IS_NULL(scbid); scbid = next) {
7477 if (scbid >= ahd->scb_data.numscbs) {
7478 printf("%s:SCB List inconsistency. "
7479 "SCB == 0x%x, yet numscbs == 0x%x.",
7480 ahd_name(ahd), scbid, ahd->scb_data.numscbs);
7481 ahd_dump_card_state(ahd);
7482 panic("for safety");
7483 }
7484 scb = ahd_lookup_scb(ahd, scbid);
7485 if (scb == NULL) {
7486 printf("%s: SCB = %d Not Active!\n",
7487 ahd_name(ahd), scbid);
7488 panic("Waiting List traversal\n");
7489 }
7490 ahd_set_scbptr(ahd, scbid);
7491 next = ahd_inw_scbram(ahd, SCB_NEXT);
7492 if (ahd_match_scb(ahd, scb, target, channel,
7493 lun, SCB_LIST_NULL, role) == 0) {
7494 prev = scbid;
7495 continue;
7496 }
7497 found++;
7498 switch (action) {
7499 case SEARCH_COMPLETE:
7500 {
7501 cam_status ostat;
7502 cam_status cstat;
7503
7504 ostat = ahd_get_transaction_status(scb);
7505 if (ostat == CAM_REQ_INPROG)
7506 ahd_set_transaction_status(scb, status);
7507 cstat = ahd_get_transaction_status(scb);
7508 if (cstat != CAM_REQ_CMP)
7509 ahd_freeze_scb(scb);
7510 if ((scb->flags & SCB_ACTIVE) == 0)
7511 printf("Inactive SCB in Waiting List\n");
7512 ahd_done(ahd, scb);
7513 /* FALLTHROUGH */
7514 }
7515 case SEARCH_REMOVE:
7516 ahd_rem_wscb(ahd, scbid, prev, next, tid);
7517 if (prev == SCB_LIST_NULL)
7518 *list_head = next;
7519 break;
7520 case SEARCH_PRINT:
7521 printf("0x%x ", scbid);
7522 case SEARCH_COUNT:
7523 prev = scbid;
7524 break;
7525 }
7526 if (found > AHD_SCB_MAX)
7527 panic("SCB LIST LOOP");
7528 }
7529 if (action == SEARCH_COMPLETE
7530 || action == SEARCH_REMOVE)
7531 ahd_outw(ahd, CMDS_PENDING, ahd_inw(ahd, CMDS_PENDING) - found);
7532 return (found);
7533 }
7534
7535 static void
7536 ahd_stitch_tid_list(struct ahd_softc *ahd, u_int tid_prev,
7537 u_int tid_cur, u_int tid_next)
7538 {
7539 AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
7540
7541 if (SCBID_IS_NULL(tid_cur)) {
7542
7543 /* Bypass current TID list */
7544 if (SCBID_IS_NULL(tid_prev)) {
7545 ahd_outw(ahd, WAITING_TID_HEAD, tid_next);
7546 } else {
7547 ahd_set_scbptr(ahd, tid_prev);
7548 ahd_outw(ahd, SCB_NEXT2, tid_next);
7549 }
7550 if (SCBID_IS_NULL(tid_next))
7551 ahd_outw(ahd, WAITING_TID_TAIL, tid_prev);
7552 } else {
7553
7554 /* Stitch through tid_cur */
7555 if (SCBID_IS_NULL(tid_prev)) {
7556 ahd_outw(ahd, WAITING_TID_HEAD, tid_cur);
7557 } else {
7558 ahd_set_scbptr(ahd, tid_prev);
7559 ahd_outw(ahd, SCB_NEXT2, tid_cur);
7560 }
7561 ahd_set_scbptr(ahd, tid_cur);
7562 ahd_outw(ahd, SCB_NEXT2, tid_next);
7563
7564 if (SCBID_IS_NULL(tid_next))
7565 ahd_outw(ahd, WAITING_TID_TAIL, tid_cur);
7566 }
7567 }
7568
7569 /*
7570 * Manipulate the waiting for selection list and return the
7571 * scb that follows the one that we remove.
7572 */
7573 static u_int
7574 ahd_rem_wscb(struct ahd_softc *ahd, u_int scbid,
7575 u_int prev, u_int next, u_int tid)
7576 {
7577 u_int tail_offset;
7578
7579 AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
7580 if (!SCBID_IS_NULL(prev)) {
7581 ahd_set_scbptr(ahd, prev);
7582 ahd_outw(ahd, SCB_NEXT, next);
7583 }
7584
7585 /*
7586 * SCBs that had MK_MESSAGE set in them will not
7587 * be queued to the per-target lists, so don't
7588 * blindly clear the tail pointer.
7589 */
7590 tail_offset = WAITING_SCB_TAILS + (2 * tid);
7591 if (SCBID_IS_NULL(next)
7592 && ahd_inw(ahd, tail_offset) == scbid)
7593 ahd_outw(ahd, tail_offset, prev);
7594 ahd_add_scb_to_free_list(ahd, scbid);
7595 return (next);
7596 }
7597
7598 /*
7599 * Add the SCB as selected by SCBPTR onto the on chip list of
7600 * free hardware SCBs. This list is empty/unused if we are not
7601 * performing SCB paging.
7602 */
7603 static void
7604 ahd_add_scb_to_free_list(struct ahd_softc *ahd, u_int scbid)
7605 {
7606 /* XXX Need some other mechanism to designate "free". */
7607 /*
7608 * Invalidate the tag so that our abort
7609 * routines don't think it's active.
7610 ahd_outb(ahd, SCB_TAG, SCB_LIST_NULL);
7611 */
7612 }
7613
7614 /******************************** Error Handling ******************************/
7615 /*
7616 * Abort all SCBs that match the given description (target/channel/lun/tag),
7617 * setting their status to the passed in status if the status has not already
7618 * been modified from CAM_REQ_INPROG. This routine assumes that the sequencer
7619 * is paused before it is called.
7620 */
7621 int
7622 ahd_abort_scbs(struct ahd_softc *ahd, int target, char channel,
7623 int lun, u_int tag, role_t role, uint32_t status)
7624 {
7625 struct scb *scbp;
7626 struct scb *scbp_next;
7627 u_int i, j;
7628 u_int maxtarget;
7629 u_int minlun;
7630 u_int maxlun;
7631 int found;
7632 ahd_mode_state saved_modes;
7633
7634 /* restore this when we're done */
7635 saved_modes = ahd_save_modes(ahd);
7636 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
7637
7638 found = ahd_search_qinfifo(ahd, target, channel, lun, SCB_LIST_NULL,
7639 role, CAM_REQUEUE_REQ, SEARCH_COMPLETE);
7640
7641 /*
7642 * Clean out the busy target table for any untagged commands.
7643 */
7644 i = 0;
7645 maxtarget = 16;
7646 if (target != CAM_TARGET_WILDCARD) {
7647 i = target;
7648 if (channel == 'B')
7649 i += 8;
7650 maxtarget = i + 1;
7651 }
7652
7653 if (lun == CAM_LUN_WILDCARD) {
7654 minlun = 0;
7655 maxlun = AHD_NUM_LUNS_NONPKT;
7656 } else if (lun >= AHD_NUM_LUNS_NONPKT) {
7657 minlun = maxlun = 0;
7658 } else {
7659 minlun = lun;
7660 maxlun = lun + 1;
7661 }
7662
7663 if (role != ROLE_TARGET) {
7664 for (;i < maxtarget; i++) {
7665 for (j = minlun;j < maxlun; j++) {
7666 u_int scbid;
7667 u_int tcl;
7668
7669 tcl = BUILD_TCL_RAW(i, 'A', j);
7670 scbid = ahd_find_busy_tcl(ahd, tcl);
7671 scbp = ahd_lookup_scb(ahd, scbid);
7672 if (scbp == NULL
7673 || ahd_match_scb(ahd, scbp, target, channel,
7674 lun, tag, role) == 0)
7675 continue;
7676 ahd_unbusy_tcl(ahd, BUILD_TCL_RAW(i, 'A', j));
7677 }
7678 }
7679 }
7680
7681 /*
7682 * Don't abort commands that have already completed,
7683 * but haven't quite made it up to the host yet.
7684 */
7685 ahd_flush_qoutfifo(ahd);
7686
7687 /*
7688 * Go through the pending CCB list and look for
7689 * commands for this target that are still active.
7690 * These are other tagged commands that were
7691 * disconnected when the reset occurred.
7692 */
7693 scbp_next = LIST_FIRST(&ahd->pending_scbs);
7694 while (scbp_next != NULL) {
7695 scbp = scbp_next;
7696 scbp_next = LIST_NEXT(scbp, pending_links);
7697 if (ahd_match_scb(ahd, scbp, target, channel, lun, tag, role)) {
7698 cam_status ostat;
7699
7700 ostat = ahd_get_transaction_status(scbp);
7701 if (ostat == CAM_REQ_INPROG)
7702 ahd_set_transaction_status(scbp, status);
7703 if (ahd_get_transaction_status(scbp) != CAM_REQ_CMP)
7704 ahd_freeze_scb(scbp);
7705 if ((scbp->flags & SCB_ACTIVE) == 0)
7706 printf("Inactive SCB on pending list\n");
7707 ahd_done(ahd, scbp);
7708 found++;
7709 }
7710 }
7711 ahd_restore_modes(ahd, saved_modes);
7712 ahd_platform_abort_scbs(ahd, target, channel, lun, tag, role, status);
7713 ahd->flags |= AHD_UPDATE_PEND_CMDS;
7714 return found;
7715 }
7716
7717 static void
7718 ahd_reset_current_bus(struct ahd_softc *ahd)
7719 {
7720 uint8_t scsiseq;
7721
7722 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
7723 ahd_outb(ahd, SIMODE1, ahd_inb(ahd, SIMODE1) & ~ENSCSIRST);
7724 scsiseq = ahd_inb(ahd, SCSISEQ0) & ~(ENSELO|ENARBO|SCSIRSTO);
7725 ahd_outb(ahd, SCSISEQ0, scsiseq | SCSIRSTO);
7726 ahd_flush_device_writes(ahd);
7727 ahd_delay(AHD_BUSRESET_DELAY);
7728 /* Turn off the bus reset */
7729 ahd_outb(ahd, SCSISEQ0, scsiseq);
7730 ahd_flush_device_writes(ahd);
7731 ahd_delay(AHD_BUSRESET_DELAY);
7732 if ((ahd->bugs & AHD_SCSIRST_BUG) != 0) {
7733 /*
7734 * 2A Razor #474
7735 * Certain chip state is not cleared for
7736 * SCSI bus resets that we initiate, so
7737 * we must reset the chip.
7738 */
7739 ahd_reset(ahd, /*reinit*/TRUE);
7740 ahd_intr_enable(ahd, /*enable*/TRUE);
7741 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
7742 }
7743
7744 ahd_clear_intstat(ahd);
7745 }
7746
7747 int
7748 ahd_reset_channel(struct ahd_softc *ahd, char channel, int initiate_reset)
7749 {
7750 struct ahd_devinfo devinfo;
7751 u_int initiator;
7752 u_int target;
7753 u_int max_scsiid;
7754 int found;
7755 u_int fifo;
7756 u_int next_fifo;
7757
7758 ahd->pending_device = NULL;
7759
7760 ahd_compile_devinfo(&devinfo,
7761 CAM_TARGET_WILDCARD,
7762 CAM_TARGET_WILDCARD,
7763 CAM_LUN_WILDCARD,
7764 channel, ROLE_UNKNOWN);
7765 ahd_pause(ahd);
7766
7767 /* Make sure the sequencer is in a safe location. */
7768 ahd_clear_critical_section(ahd);
7769
7770 #ifdef AHD_TARGET_MODE
7771 if ((ahd->flags & AHD_TARGETROLE) != 0) {
7772 ahd_run_tqinfifo(ahd, /*paused*/TRUE);
7773 }
7774 #endif
7775 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
7776
7777 /*
7778 * Disable selections so no automatic hardware
7779 * functions will modify chip state.
7780 */
7781 ahd_outb(ahd, SCSISEQ0, 0);
7782 ahd_outb(ahd, SCSISEQ1, 0);
7783
7784 /*
7785 * Safely shut down our DMA engines. Always start with
7786 * the FIFO that is not currently active (if any are
7787 * actively connected).
7788 */
7789 next_fifo = fifo = ahd_inb(ahd, DFFSTAT) & CURRFIFO;
7790 if (next_fifo > CURRFIFO_1)
7791 /* If disconneced, arbitrarily start with FIFO1. */
7792 next_fifo = fifo = 0;
7793 do {
7794 next_fifo ^= CURRFIFO_1;
7795 ahd_set_modes(ahd, next_fifo, next_fifo);
7796 ahd_outb(ahd, DFCNTRL,
7797 ahd_inb(ahd, DFCNTRL) & ~(SCSIEN|HDMAEN));
7798 while ((ahd_inb(ahd, DFCNTRL) & HDMAENACK) != 0)
7799 ahd_delay(10);
7800 /*
7801 * Set CURRFIFO to the now inactive channel.
7802 */
7803 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
7804 ahd_outb(ahd, DFFSTAT, next_fifo);
7805 } while (next_fifo != fifo);
7806
7807 /*
7808 * Reset the bus if we are initiating this reset
7809 */
7810 ahd_clear_msg_state(ahd);
7811 ahd_outb(ahd, SIMODE1,
7812 ahd_inb(ahd, SIMODE1) & ~(ENBUSFREE|ENSCSIRST|ENBUSFREE));
7813
7814 if (initiate_reset)
7815 ahd_reset_current_bus(ahd);
7816
7817 ahd_clear_intstat(ahd);
7818
7819 /*
7820 * Clean up all the state information for the
7821 * pending transactions on this bus.
7822 */
7823 found = ahd_abort_scbs(ahd, CAM_TARGET_WILDCARD, channel,
7824 CAM_LUN_WILDCARD, SCB_LIST_NULL,
7825 ROLE_UNKNOWN, CAM_SCSI_BUS_RESET);
7826
7827 /*
7828 * Cleanup anything left in the FIFOs.
7829 */
7830 ahd_clear_fifo(ahd, 0);
7831 ahd_clear_fifo(ahd, 1);
7832
7833 /*
7834 * Revert to async/narrow transfers until we renegotiate.
7835 */
7836 max_scsiid = (ahd->features & AHD_WIDE) ? 15 : 7;
7837 for (target = 0; target <= max_scsiid; target++) {
7838
7839 if (ahd->enabled_targets[target] == NULL)
7840 continue;
7841 for (initiator = 0; initiator <= max_scsiid; initiator++) {
7842 struct ahd_devinfo devinfo;
7843
7844 ahd_compile_devinfo(&devinfo, target, initiator,
7845 CAM_LUN_WILDCARD,
7846 'A', ROLE_UNKNOWN);
7847 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
7848 AHD_TRANS_CUR, /*paused*/TRUE);
7849 ahd_set_syncrate(ahd, &devinfo, /*period*/0,
7850 /*offset*/0, /*ppr_options*/0,
7851 AHD_TRANS_CUR, /*paused*/TRUE);
7852 }
7853 }
7854
7855 #ifdef AHD_TARGET_MODE
7856 max_scsiid = (ahd->features & AHD_WIDE) ? 15 : 7;
7857
7858 /*
7859 * Send an immediate notify ccb to all target more peripheral
7860 * drivers affected by this action.
7861 */
7862 for (target = 0; target <= max_scsiid; target++) {
7863 struct ahd_tmode_tstate* tstate;
7864 u_int lun;
7865
7866 tstate = ahd->enabled_targets[target];
7867 if (tstate == NULL)
7868 continue;
7869 for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
7870 struct ahd_tmode_lstate* lstate;
7871
7872 lstate = tstate->enabled_luns[lun];
7873 if (lstate == NULL)
7874 continue;
7875
7876 ahd_queue_lstate_event(ahd, lstate, CAM_TARGET_WILDCARD,
7877 EVENT_TYPE_BUS_RESET, /*arg*/0);
7878 ahd_send_lstate_events(ahd, lstate);
7879 }
7880 }
7881 #endif
7882 /* Notify the XPT that a bus reset occurred */
7883 ahd_send_async(ahd, devinfo.channel, CAM_TARGET_WILDCARD,
7884 CAM_LUN_WILDCARD, AC_BUS_RESET, NULL);
7885 ahd_restart(ahd);
7886 /*
7887 * Freeze the SIMQ until our poller can determine that
7888 * the bus reset has really gone away. We set the initial
7889 * timer to 0 to have the check performed as soon as possible
7890 * from the timer context.
7891 */
7892 if ((ahd->flags & AHD_RESET_POLL_ACTIVE) == 0) {
7893 ahd->flags |= AHD_RESET_POLL_ACTIVE;
7894 ahd_freeze_simq(ahd);
7895 ahd_timer_reset(&ahd->reset_timer, 0, ahd_reset_poll, ahd);
7896 }
7897 return (found);
7898 }
7899
7900
7901 #define AHD_RESET_POLL_US 1000
7902 static void
7903 ahd_reset_poll(void *arg)
7904 {
7905 struct ahd_softc *ahd;
7906 u_int scsiseq1;
7907 u_long l;
7908 u_long s;
7909
7910 ahd_list_lock(&l);
7911 ahd = ahd_find_softc((struct ahd_softc *)arg);
7912 if (ahd == NULL) {
7913 printf("ahd_reset_poll: Instance %p no longer exists\n", arg);
7914 ahd_list_unlock(&l);
7915 return;
7916 }
7917 ahd_lock(ahd, &s);
7918 ahd_pause(ahd);
7919 ahd_update_modes(ahd);
7920 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
7921 ahd_outb(ahd, CLRSINT1, CLRSCSIRSTI);
7922 if ((ahd_inb(ahd, SSTAT1) & SCSIRSTI) != 0) {
7923 ahd_timer_reset(&ahd->reset_timer, AHD_RESET_POLL_US,
7924 ahd_reset_poll, ahd);
7925 ahd_unpause(ahd);
7926 ahd_unlock(ahd, &s);
7927 ahd_list_unlock(&l);
7928 return;
7929 }
7930
7931 /* Reset is now low. Complete chip reinitialization. */
7932 ahd_outb(ahd, SIMODE1, ahd_inb(ahd, SIMODE1) | ENSCSIRST);
7933 scsiseq1 = ahd_inb(ahd, SCSISEQ_TEMPLATE);
7934 ahd_outb(ahd, SCSISEQ1, scsiseq1 & (ENSELI|ENRSELI|ENAUTOATNP));
7935 ahd_unpause(ahd);
7936 ahd->flags &= ~AHD_RESET_POLL_ACTIVE;
7937 ahd_unlock(ahd, &s);
7938 ahd_release_simq(ahd);
7939 ahd_list_unlock(&l);
7940 }
7941
7942 /**************************** Statistics Processing ***************************/
7943 static void
7944 ahd_stat_timer(void *arg)
7945 {
7946 struct ahd_softc *ahd;
7947 u_long l;
7948 u_long s;
7949 int enint_coal;
7950
7951 ahd_list_lock(&l);
7952 ahd = ahd_find_softc((struct ahd_softc *)arg);
7953 if (ahd == NULL) {
7954 printf("ahd_stat_timer: Instance %p no longer exists\n", arg);
7955 ahd_list_unlock(&l);
7956 return;
7957 }
7958 ahd_lock(ahd, &s);
7959
7960 enint_coal = ahd->hs_mailbox & ENINT_COALESCE;
7961 if (ahd->cmdcmplt_total > ahd->int_coalescing_threshold)
7962 enint_coal |= ENINT_COALESCE;
7963 else if (ahd->cmdcmplt_total < ahd->int_coalescing_stop_threshold)
7964 enint_coal &= ~ENINT_COALESCE;
7965
7966 if (enint_coal != (ahd->hs_mailbox & ENINT_COALESCE)) {
7967 ahd_enable_coalescing(ahd, enint_coal);
7968 #ifdef AHD_DEBUG
7969 if ((ahd_debug & AHD_SHOW_INT_COALESCING) != 0)
7970 printf("%s: Interrupt coalescing "
7971 "now %sabled. Cmds %d\n",
7972 ahd_name(ahd),
7973 (enint_coal & ENINT_COALESCE) ? "en" : "dis",
7974 ahd->cmdcmplt_total);
7975 #endif
7976 }
7977
7978 ahd->cmdcmplt_bucket = (ahd->cmdcmplt_bucket+1) & (AHD_STAT_BUCKETS-1);
7979 ahd->cmdcmplt_total -= ahd->cmdcmplt_counts[ahd->cmdcmplt_bucket];
7980 ahd->cmdcmplt_counts[ahd->cmdcmplt_bucket] = 0;
7981 ahd_timer_reset(&ahd->stat_timer, AHD_STAT_UPDATE_US,
7982 ahd_stat_timer, ahd);
7983 ahd_unlock(ahd, &s);
7984 ahd_list_unlock(&l);
7985 }
7986
7987 /****************************** Status Processing *****************************/
7988 void
7989 ahd_handle_scb_status(struct ahd_softc *ahd, struct scb *scb)
7990 {
7991 if (scb->hscb->shared_data.istatus.scsi_status != 0) {
7992 ahd_handle_scsi_status(ahd, scb);
7993 } else {
7994 ahd_calc_residual(ahd, scb);
7995 ahd_done(ahd, scb);
7996 }
7997 }
7998
7999 void
8000 ahd_handle_scsi_status(struct ahd_softc *ahd, struct scb *scb)
8001 {
8002 struct hardware_scb *hscb;
8003 u_int qfreeze_cnt;
8004
8005 /*
8006 * The sequencer freezes its select-out queue
8007 * anytime a SCSI status error occurs. We must
8008 * handle the error and decrement the QFREEZE count
8009 * to allow the sequencer to continue.
8010 */
8011 hscb = scb->hscb;
8012
8013 /* Freeze the queue until the client sees the error. */
8014 ahd_freeze_devq(ahd, scb);
8015 ahd_freeze_scb(scb);
8016 qfreeze_cnt = ahd_inw(ahd, QFREEZE_COUNT);
8017 if (qfreeze_cnt == 0) {
8018 printf("%s: Bad status with 0 qfreeze count!\n", ahd_name(ahd));
8019 } else {
8020 qfreeze_cnt--;
8021 ahd_outw(ahd, QFREEZE_COUNT, qfreeze_cnt);
8022 }
8023 if (qfreeze_cnt == 0)
8024 ahd_outb(ahd, SEQ_FLAGS2,
8025 ahd_inb(ahd, SEQ_FLAGS2) & ~SELECTOUT_QFROZEN);
8026
8027 /* Don't want to clobber the original sense code */
8028 if ((scb->flags & SCB_SENSE) != 0) {
8029 /*
8030 * Clear the SCB_SENSE Flag and perform
8031 * a normal command completion.
8032 */
8033 scb->flags &= ~SCB_SENSE;
8034 ahd_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
8035 ahd_done(ahd, scb);
8036 return;
8037 }
8038 ahd_set_transaction_status(scb, CAM_SCSI_STATUS_ERROR);
8039 ahd_set_scsi_status(scb, hscb->shared_data.istatus.scsi_status);
8040 switch (hscb->shared_data.istatus.scsi_status) {
8041 case STATUS_PKT_SENSE:
8042 {
8043 struct scsi_status_iu_header *siu;
8044
8045 ahd_sync_sense(ahd, scb, BUS_DMASYNC_POSTREAD);
8046 siu = (struct scsi_status_iu_header *)scb->sense_data;
8047 ahd_set_scsi_status(scb, siu->status);
8048 #ifdef AHD_DEBUG
8049 if ((ahd_debug & AHD_SHOW_SENSE) != 0) {
8050 ahd_print_path(ahd, scb);
8051 printf("SCB 0x%x Received PKT Status of 0x%x\n",
8052 SCB_GET_TAG(scb), siu->status);
8053 printf("\tflags = 0x%x, sense len = 0x%x, "
8054 "pktfail = 0x%x\n",
8055 siu->flags, scsi_4btoul(siu->sense_length),
8056 scsi_4btoul(siu->pkt_failures_length));
8057 }
8058 #endif
8059 if ((siu->flags & SIU_RSPVALID) != 0) {
8060 ahd_print_path(ahd, scb);
8061 if (scsi_4btoul(siu->pkt_failures_length) < 4) {
8062 printf("Unable to parse pkt_failures\n");
8063 } else {
8064
8065 switch (SIU_PKTFAIL_CODE(siu)) {
8066 case SIU_PFC_NONE:
8067 printf("No packet failure found\n");
8068 break;
8069 case SIU_PFC_CIU_FIELDS_INVALID:
8070 printf("Invalid Command IU Field\n");
8071 break;
8072 case SIU_PFC_TMF_NOT_SUPPORTED:
8073 printf("TMF not supportd\n");
8074 break;
8075 case SIU_PFC_TMF_FAILED:
8076 printf("TMF failed\n");
8077 break;
8078 case SIU_PFC_INVALID_TYPE_CODE:
8079 printf("Invalid L_Q Type code\n");
8080 break;
8081 case SIU_PFC_ILLEGAL_REQUEST:
8082 printf("Illegal request\n");
8083 default:
8084 break;
8085 }
8086 }
8087 if (siu->status == SCSI_STATUS_OK)
8088 ahd_set_transaction_status(scb,
8089 CAM_REQ_CMP_ERR);
8090 }
8091 if ((siu->flags & SIU_SNSVALID) != 0) {
8092 scb->flags |= SCB_PKT_SENSE;
8093 #ifdef AHD_DEBUG
8094 if ((ahd_debug & AHD_SHOW_SENSE) != 0)
8095 printf("Sense data available\n");
8096 #endif
8097 }
8098 ahd_done(ahd, scb);
8099 break;
8100 }
8101 case SCSI_STATUS_CMD_TERMINATED:
8102 case SCSI_STATUS_CHECK_COND:
8103 {
8104 struct ahd_devinfo devinfo;
8105 struct ahd_dma_seg *sg;
8106 struct scsi_sense *sc;
8107 struct ahd_initiator_tinfo *targ_info;
8108 struct ahd_tmode_tstate *tstate;
8109 struct ahd_transinfo *tinfo;
8110 #ifdef AHD_DEBUG
8111 if (ahd_debug & AHD_SHOW_SENSE) {
8112 ahd_print_path(ahd, scb);
8113 printf("SCB %d: requests Check Status\n",
8114 SCB_GET_TAG(scb));
8115 }
8116 #endif
8117
8118 if (ahd_perform_autosense(scb) == 0)
8119 break;
8120
8121 ahd_compile_devinfo(&devinfo, SCB_GET_OUR_ID(scb),
8122 SCB_GET_TARGET(ahd, scb),
8123 SCB_GET_LUN(scb),
8124 SCB_GET_CHANNEL(ahd, scb),
8125 ROLE_INITIATOR);
8126 targ_info = ahd_fetch_transinfo(ahd,
8127 devinfo.channel,
8128 devinfo.our_scsiid,
8129 devinfo.target,
8130 &tstate);
8131 tinfo = &targ_info->curr;
8132 sg = scb->sg_list;
8133 sc = (struct scsi_sense *)hscb->shared_data.idata.cdb;
8134 /*
8135 * Save off the residual if there is one.
8136 */
8137 ahd_update_residual(ahd, scb);
8138 #ifdef AHD_DEBUG
8139 if (ahd_debug & AHD_SHOW_SENSE) {
8140 ahd_print_path(ahd, scb);
8141 printf("Sending Sense\n");
8142 }
8143 #endif
8144 scb->sg_count = 0;
8145 sg = ahd_sg_setup(ahd, scb, sg, ahd_get_sense_bufaddr(ahd, scb),
8146 ahd_get_sense_bufsize(ahd, scb),
8147 /*last*/TRUE);
8148 sc->opcode = REQUEST_SENSE;
8149 sc->byte2 = 0;
8150 if (tinfo->protocol_version <= SCSI_REV_2
8151 && SCB_GET_LUN(scb) < 8)
8152 sc->byte2 = SCB_GET_LUN(scb) << 5;
8153 sc->unused[0] = 0;
8154 sc->unused[1] = 0;
8155 sc->length = ahd_get_sense_bufsize(ahd, scb);
8156 sc->control = 0;
8157
8158 /*
8159 * We can't allow the target to disconnect.
8160 * This will be an untagged transaction and
8161 * having the target disconnect will make this
8162 * transaction indestinguishable from outstanding
8163 * tagged transactions.
8164 */
8165 hscb->control = 0;
8166
8167 /*
8168 * This request sense could be because the
8169 * the device lost power or in some other
8170 * way has lost our transfer negotiations.
8171 * Renegotiate if appropriate. Unit attention
8172 * errors will be reported before any data
8173 * phases occur.
8174 */
8175 if (ahd_get_residual(scb) == ahd_get_transfer_length(scb)) {
8176 ahd_update_neg_request(ahd, &devinfo,
8177 tstate, targ_info,
8178 AHD_NEG_IF_NON_ASYNC);
8179 }
8180 if (tstate->auto_negotiate & devinfo.target_mask) {
8181 hscb->control |= MK_MESSAGE;
8182 scb->flags &=
8183 ~(SCB_NEGOTIATE|SCB_ABORT|SCB_DEVICE_RESET);
8184 scb->flags |= SCB_AUTO_NEGOTIATE;
8185 }
8186 hscb->cdb_len = sizeof(*sc);
8187 ahd_setup_data_scb(ahd, scb);
8188 scb->flags |= SCB_SENSE;
8189 ahd_queue_scb(ahd, scb);
8190 /*
8191 * Ensure we have enough time to actually
8192 * retrieve the sense.
8193 */
8194 ahd_scb_timer_reset(scb, 5 * 1000000);
8195 break;
8196 }
8197 case SCSI_STATUS_OK:
8198 printf("%s: Interrupted for staus of 0???\n",
8199 ahd_name(ahd));
8200 /* FALLTHROUGH */
8201 default:
8202 ahd_done(ahd, scb);
8203 break;
8204 }
8205 }
8206
8207 /*
8208 * Calculate the residual for a just completed SCB.
8209 */
8210 void
8211 ahd_calc_residual(struct ahd_softc *ahd, struct scb *scb)
8212 {
8213 struct hardware_scb *hscb;
8214 struct initiator_status *spkt;
8215 uint32_t sgptr;
8216 uint32_t resid_sgptr;
8217 uint32_t resid;
8218
8219 /*
8220 * 5 cases.
8221 * 1) No residual.
8222 * SG_STATUS_VALID clear in sgptr.
8223 * 2) Transferless command
8224 * 3) Never performed any transfers.
8225 * sgptr has SG_FULL_RESID set.
8226 * 4) No residual but target did not
8227 * save data pointers after the
8228 * last transfer, so sgptr was
8229 * never updated.
8230 * 5) We have a partial residual.
8231 * Use residual_sgptr to determine
8232 * where we are.
8233 */
8234
8235 hscb = scb->hscb;
8236 sgptr = ahd_le32toh(hscb->sgptr);
8237 if ((sgptr & SG_STATUS_VALID) == 0)
8238 /* Case 1 */
8239 return;
8240 sgptr &= ~SG_STATUS_VALID;
8241
8242 if ((sgptr & SG_LIST_NULL) != 0)
8243 /* Case 2 */
8244 return;
8245
8246 /*
8247 * Residual fields are the same in both
8248 * target and initiator status packets,
8249 * so we can always use the initiator fields
8250 * regardless of the role for this SCB.
8251 */
8252 spkt = &hscb->shared_data.istatus;
8253 resid_sgptr = ahd_le32toh(spkt->residual_sgptr);
8254 if ((sgptr & SG_FULL_RESID) != 0) {
8255 /* Case 3 */
8256 resid = ahd_get_transfer_length(scb);
8257 } else if ((resid_sgptr & SG_LIST_NULL) != 0) {
8258 /* Case 4 */
8259 return;
8260 } else if ((resid_sgptr & SG_OVERRUN_RESID) != 0) {
8261 ahd_print_path(ahd, scb);
8262 printf("data overrun detected Tag == 0x%x.\n",
8263 SCB_GET_TAG(scb));
8264 ahd_freeze_devq(ahd, scb);
8265 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
8266 ahd_freeze_scb(scb);
8267 return;
8268 } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) {
8269 panic("Bogus resid sgptr value 0x%x\n", resid_sgptr);
8270 /* NOTREACHED */
8271 } else {
8272 struct ahd_dma_seg *sg;
8273
8274 /*
8275 * Remainder of the SG where the transfer
8276 * stopped.
8277 */
8278 resid = ahd_le32toh(spkt->residual_datacnt) & AHD_SG_LEN_MASK;
8279 sg = ahd_sg_bus_to_virt(ahd, scb, resid_sgptr & SG_PTR_MASK);
8280
8281 /* The residual sg_ptr always points to the next sg */
8282 sg--;
8283
8284 /*
8285 * Add up the contents of all residual
8286 * SG segments that are after the SG where
8287 * the transfer stopped.
8288 */
8289 while ((ahd_le32toh(sg->len) & AHD_DMA_LAST_SEG) == 0) {
8290 sg++;
8291 resid += ahd_le32toh(sg->len) & AHD_SG_LEN_MASK;
8292 }
8293 }
8294 if ((scb->flags & SCB_SENSE) == 0)
8295 ahd_set_residual(scb, resid);
8296 else
8297 ahd_set_sense_residual(scb, resid);
8298
8299 #ifdef AHD_DEBUG
8300 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
8301 ahd_print_path(ahd, scb);
8302 printf("Handled %sResidual of %d bytes\n",
8303 (scb->flags & SCB_SENSE) ? "Sense " : "", resid);
8304 }
8305 #endif
8306 }
8307
8308 /******************************* Target Mode **********************************/
8309 #ifdef AHD_TARGET_MODE
8310 /*
8311 * Add a target mode event to this lun's queue
8312 */
8313 static void
8314 ahd_queue_lstate_event(struct ahd_softc *ahd, struct ahd_tmode_lstate *lstate,
8315 u_int initiator_id, u_int event_type, u_int event_arg)
8316 {
8317 struct ahd_tmode_event *event;
8318 int pending;
8319
8320 xpt_freeze_devq(lstate->path, /*count*/1);
8321 if (lstate->event_w_idx >= lstate->event_r_idx)
8322 pending = lstate->event_w_idx - lstate->event_r_idx;
8323 else
8324 pending = AHD_TMODE_EVENT_BUFFER_SIZE + 1
8325 - (lstate->event_r_idx - lstate->event_w_idx);
8326
8327 if (event_type == EVENT_TYPE_BUS_RESET
8328 || event_type == MSG_BUS_DEV_RESET) {
8329 /*
8330 * Any earlier events are irrelevant, so reset our buffer.
8331 * This has the effect of allowing us to deal with reset
8332 * floods (an external device holding down the reset line)
8333 * without losing the event that is really interesting.
8334 */
8335 lstate->event_r_idx = 0;
8336 lstate->event_w_idx = 0;
8337 xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE);
8338 }
8339
8340 if (pending == AHD_TMODE_EVENT_BUFFER_SIZE) {
8341 xpt_print_path(lstate->path);
8342 printf("immediate event %x:%x lost\n",
8343 lstate->event_buffer[lstate->event_r_idx].event_type,
8344 lstate->event_buffer[lstate->event_r_idx].event_arg);
8345 lstate->event_r_idx++;
8346 if (lstate->event_r_idx == AHD_TMODE_EVENT_BUFFER_SIZE)
8347 lstate->event_r_idx = 0;
8348 xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE);
8349 }
8350
8351 event = &lstate->event_buffer[lstate->event_w_idx];
8352 event->initiator_id = initiator_id;
8353 event->event_type = event_type;
8354 event->event_arg = event_arg;
8355 lstate->event_w_idx++;
8356 if (lstate->event_w_idx == AHD_TMODE_EVENT_BUFFER_SIZE)
8357 lstate->event_w_idx = 0;
8358 }
8359
8360 /*
8361 * Send any target mode events queued up waiting
8362 * for immediate notify resources.
8363 */
8364 void
8365 ahd_send_lstate_events(struct ahd_softc *ahd, struct ahd_tmode_lstate *lstate)
8366 {
8367 struct ccb_hdr *ccbh;
8368 struct ccb_immed_notify *inot;
8369
8370 while (lstate->event_r_idx != lstate->event_w_idx
8371 && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) {
8372 struct ahd_tmode_event *event;
8373
8374 event = &lstate->event_buffer[lstate->event_r_idx];
8375 SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle);
8376 inot = (struct ccb_immed_notify *)ccbh;
8377 switch (event->event_type) {
8378 case EVENT_TYPE_BUS_RESET:
8379 ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN;
8380 break;
8381 default:
8382 ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN;
8383 inot->message_args[0] = event->event_type;
8384 inot->message_args[1] = event->event_arg;
8385 break;
8386 }
8387 inot->initiator_id = event->initiator_id;
8388 inot->sense_len = 0;
8389 xpt_done((union ccb *)inot);
8390 lstate->event_r_idx++;
8391 if (lstate->event_r_idx == AHD_TMODE_EVENT_BUFFER_SIZE)
8392 lstate->event_r_idx = 0;
8393 }
8394 }
8395 #endif
8396
8397 /******************** Sequencer Program Patching/Download *********************/
8398
8399 #ifdef AHD_DUMP_SEQ
8400 void
8401 ahd_dumpseq(struct ahd_softc* ahd)
8402 {
8403 int i;
8404 int max_prog;
8405
8406 max_prog = 2048;
8407
8408 ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
8409 ahd_outb(ahd, PRGMCNT, 0);
8410 ahd_outb(ahd, PRGMCNT+1, 0);
8411 for (i = 0; i < max_prog; i++) {
8412 uint8_t ins_bytes[4];
8413
8414 ahd_insb(ahd, SEQRAM, ins_bytes, 4);
8415 printf("0x%08x\n", ins_bytes[0] << 24
8416 | ins_bytes[1] << 16
8417 | ins_bytes[2] << 8
8418 | ins_bytes[3]);
8419 }
8420 }
8421 #endif
8422
8423 static void
8424 ahd_loadseq(struct ahd_softc *ahd)
8425 {
8426 struct cs cs_table[num_critical_sections];
8427 u_int begin_set[num_critical_sections];
8428 u_int end_set[num_critical_sections];
8429 struct patch *cur_patch;
8430 u_int cs_count;
8431 u_int cur_cs;
8432 u_int i;
8433 int downloaded;
8434 u_int skip_addr;
8435 u_int sg_prefetch_cnt;
8436 u_int sg_prefetch_cnt_limit;
8437 u_int sg_prefetch_align;
8438 u_int sg_size;
8439 uint8_t download_consts[DOWNLOAD_CONST_COUNT];
8440
8441 if (bootverbose)
8442 printf("%s: Downloading Sequencer Program...",
8443 ahd_name(ahd));
8444
8445 #if DOWNLOAD_CONST_COUNT != 7
8446 #error "Download Const Mismatch"
8447 #endif
8448 /*
8449 * Start out with 0 critical sections
8450 * that apply to this firmware load.
8451 */
8452 cs_count = 0;
8453 cur_cs = 0;
8454 memset(begin_set, 0, sizeof(begin_set));
8455 memset(end_set, 0, sizeof(end_set));
8456
8457 /*
8458 * Setup downloadable constant table.
8459 *
8460 * The computation for the S/G prefetch variables is
8461 * a bit complicated. We would like to always fetch
8462 * in terms of cachelined sized increments. However,
8463 * if the cacheline is not an even multiple of the
8464 * SG element size or is larger than our SG RAM, using
8465 * just the cache size might leave us with only a portion
8466 * of an SG element at the tail of a prefetch. If the
8467 * cacheline is larger than our S/G prefetch buffer less
8468 * the size of an SG element, we may round down to a cacheline
8469 * that doesn't contain any or all of the S/G of interest
8470 * within the bounds of our S/G ram. Provide variables to
8471 * the sequencer that will allow it to handle these edge
8472 * cases.
8473 */
8474 /* Start by aligning to the nearest cacheline. */
8475 sg_prefetch_align = ahd->pci_cachesize;
8476 if (sg_prefetch_align == 0)
8477 sg_prefetch_align = 8;
8478 /* Round down to the nearest power of 2. */
8479 while (powerof2(sg_prefetch_align) == 0)
8480 sg_prefetch_align--;
8481 /*
8482 * If the cacheline boundary is greater than half our prefetch RAM
8483 * we risk not being able to fetch even a single complete S/G
8484 * segment if we align to that boundary.
8485 */
8486 if (sg_prefetch_align > CCSGADDR_MAX/2)
8487 sg_prefetch_align = CCSGADDR_MAX/2;
8488 /* Start by fetching a single cacheline. */
8489 sg_prefetch_cnt = sg_prefetch_align;
8490 /*
8491 * Increment the prefetch count by cachelines until
8492 * at least one S/G element will fit.
8493 */
8494 sg_size = sizeof(struct ahd_dma_seg);
8495 if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0)
8496 sg_size = sizeof(struct ahd_dma64_seg);
8497 while (sg_prefetch_cnt < sg_size)
8498 sg_prefetch_cnt += sg_prefetch_align;
8499 /*
8500 * If the cacheline is not an even multiple of
8501 * the S/G size, we may only get a partial S/G when
8502 * we align. Add a cacheline if this is the case.
8503 */
8504 if ((sg_prefetch_align % sg_size) != 0
8505 && (sg_prefetch_cnt < CCSGADDR_MAX))
8506 sg_prefetch_cnt += sg_prefetch_align;
8507 /*
8508 * Lastly, compute a value that the sequencer can use
8509 * to determine if the remainder of the CCSGRAM buffer
8510 * has a full S/G element in it.
8511 */
8512 sg_prefetch_cnt_limit = -(sg_prefetch_cnt - sg_size + 1);
8513 download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt;
8514 download_consts[SG_PREFETCH_CNT_LIMIT] = sg_prefetch_cnt_limit;
8515 download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_align - 1);
8516 download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_align - 1);
8517 download_consts[SG_SIZEOF] = sg_size;
8518 download_consts[PKT_OVERRUN_BUFOFFSET] =
8519 (ahd->overrun_buf - (uint8_t *)ahd->qoutfifo) / 256;
8520 download_consts[SCB_TRANSFER_SIZE] = SCB_TRANSFER_SIZE_1BYTE_LUN;
8521 cur_patch = patches;
8522 downloaded = 0;
8523 skip_addr = 0;
8524 ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
8525 ahd_outb(ahd, PRGMCNT, 0);
8526 ahd_outb(ahd, PRGMCNT+1, 0);
8527
8528 for (i = 0; i < sizeof(seqprog)/4; i++) {
8529 if (ahd_check_patch(ahd, &cur_patch, i, &skip_addr) == 0) {
8530 /*
8531 * Don't download this instruction as it
8532 * is in a patch that was removed.
8533 */
8534 continue;
8535 }
8536 /*
8537 * Move through the CS table until we find a CS
8538 * that might apply to this instruction.
8539 */
8540 for (; cur_cs < num_critical_sections; cur_cs++) {
8541 if (critical_sections[cur_cs].end <= i) {
8542 if (begin_set[cs_count] == TRUE
8543 && end_set[cs_count] == FALSE) {
8544 cs_table[cs_count].end = downloaded;
8545 end_set[cs_count] = TRUE;
8546 cs_count++;
8547 }
8548 continue;
8549 }
8550 if (critical_sections[cur_cs].begin <= i
8551 && begin_set[cs_count] == FALSE) {
8552 cs_table[cs_count].begin = downloaded;
8553 begin_set[cs_count] = TRUE;
8554 }
8555 break;
8556 }
8557 ahd_download_instr(ahd, i, download_consts);
8558 downloaded++;
8559 }
8560
8561 ahd->num_critical_sections = cs_count;
8562 if (cs_count != 0) {
8563
8564 cs_count *= sizeof(struct cs);
8565 ahd->critical_sections = malloc(cs_count, M_DEVBUF, M_NOWAIT);
8566 if (ahd->critical_sections == NULL)
8567 panic("ahd_loadseq: Could not malloc");
8568 memcpy(ahd->critical_sections, cs_table, cs_count);
8569 }
8570 ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS|FASTMODE);
8571
8572 if (bootverbose) {
8573 printf(" %d instructions downloaded\n", downloaded);
8574 printf("%s: Features 0x%x, Bugs 0x%x, Flags 0x%x\n",
8575 ahd_name(ahd), ahd->features, ahd->bugs, ahd->flags);
8576 }
8577 }
8578
8579 static int
8580 ahd_check_patch(struct ahd_softc *ahd, struct patch **start_patch,
8581 u_int start_instr, u_int *skip_addr)
8582 {
8583 struct patch *cur_patch;
8584 struct patch *last_patch;
8585 u_int num_patches;
8586
8587 num_patches = sizeof(patches)/sizeof(struct patch);
8588 last_patch = &patches[num_patches];
8589 cur_patch = *start_patch;
8590
8591 while (cur_patch < last_patch && start_instr == cur_patch->begin) {
8592
8593 if (cur_patch->patch_func(ahd) == 0) {
8594
8595 /* Start rejecting code */
8596 *skip_addr = start_instr + cur_patch->skip_instr;
8597 cur_patch += cur_patch->skip_patch;
8598 } else {
8599 /* Accepted this patch. Advance to the next
8600 * one and wait for our intruction pointer to
8601 * hit this point.
8602 */
8603 cur_patch++;
8604 }
8605 }
8606
8607 *start_patch = cur_patch;
8608 if (start_instr < *skip_addr)
8609 /* Still skipping */
8610 return (0);
8611
8612 return (1);
8613 }
8614
8615 static u_int
8616 ahd_resolve_seqaddr(struct ahd_softc *ahd, u_int address)
8617 {
8618 struct patch *cur_patch;
8619 int address_offset;
8620 u_int skip_addr;
8621 u_int i;
8622
8623 address_offset = 0;
8624 cur_patch = patches;
8625 skip_addr = 0;
8626
8627 for (i = 0; i < address;) {
8628
8629 ahd_check_patch(ahd, &cur_patch, i, &skip_addr);
8630
8631 if (skip_addr > i) {
8632 int end_addr;
8633
8634 end_addr = MIN(address, skip_addr);
8635 address_offset += end_addr - i;
8636 i = skip_addr;
8637 } else {
8638 i++;
8639 }
8640 }
8641 return (address - address_offset);
8642 }
8643
8644 static void
8645 ahd_download_instr(struct ahd_softc *ahd, u_int instrptr, uint8_t *dconsts)
8646 {
8647 union ins_formats instr;
8648 struct ins_format1 *fmt1_ins;
8649 struct ins_format3 *fmt3_ins;
8650 u_int opcode;
8651
8652 /*
8653 * The firmware is always compiled into a little endian format.
8654 */
8655 instr.integer = ahd_le32toh(*(uint32_t*)&seqprog[instrptr * 4]);
8656
8657 fmt1_ins = &instr.format1;
8658 fmt3_ins = NULL;
8659
8660 /* Pull the opcode */
8661 opcode = instr.format1.opcode;
8662 switch (opcode) {
8663 case AIC_OP_JMP:
8664 case AIC_OP_JC:
8665 case AIC_OP_JNC:
8666 case AIC_OP_CALL:
8667 case AIC_OP_JNE:
8668 case AIC_OP_JNZ:
8669 case AIC_OP_JE:
8670 case AIC_OP_JZ:
8671 {
8672 fmt3_ins = &instr.format3;
8673 fmt3_ins->address = ahd_resolve_seqaddr(ahd, fmt3_ins->address);
8674 /* FALLTHROUGH */
8675 }
8676 case AIC_OP_OR:
8677 case AIC_OP_AND:
8678 case AIC_OP_XOR:
8679 case AIC_OP_ADD:
8680 case AIC_OP_ADC:
8681 case AIC_OP_BMOV:
8682 if (fmt1_ins->parity != 0) {
8683 fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
8684 }
8685 fmt1_ins->parity = 0;
8686 /* FALLTHROUGH */
8687 case AIC_OP_ROL:
8688 {
8689 int i, count;
8690
8691 /* Calculate odd parity for the instruction */
8692 for (i = 0, count = 0; i < 31; i++) {
8693 uint32_t mask;
8694
8695 mask = 0x01 << i;
8696 if ((instr.integer & mask) != 0)
8697 count++;
8698 }
8699 if ((count & 0x01) == 0)
8700 instr.format1.parity = 1;
8701
8702 /* The sequencer is a little endian cpu */
8703 instr.integer = ahd_htole32(instr.integer);
8704 ahd_outsb(ahd, SEQRAM, instr.bytes, 4);
8705 break;
8706 }
8707 default:
8708 panic("Unknown opcode encountered in seq program");
8709 break;
8710 }
8711 }
8712
8713 static int
8714 ahd_probe_stack_size(struct ahd_softc *ahd)
8715 {
8716 int last_probe;
8717
8718 last_probe = 0;
8719 while (1) {
8720 int i;
8721
8722 /*
8723 * We avoid using 0 as a pattern to avoid
8724 * confusion if the stack implementation
8725 * "back-fills" with zeros when "poping'
8726 * entries.
8727 */
8728 for (i = 1; i <= last_probe+1; i++) {
8729 ahd_outb(ahd, STACK, i & 0xFF);
8730 ahd_outb(ahd, STACK, (i >> 8) & 0xFF);
8731 }
8732
8733 /* Verify */
8734 for (i = last_probe+1; i > 0; i--) {
8735 u_int stack_entry;
8736
8737 stack_entry = ahd_inb(ahd, STACK)
8738 |(ahd_inb(ahd, STACK) << 8);
8739 if (stack_entry != i)
8740 goto sized;
8741 }
8742 last_probe++;
8743 }
8744 sized:
8745 return (last_probe);
8746 }
8747
8748 void
8749 ahd_dump_all_cards_state(void)
8750 {
8751 struct ahd_softc *list_ahd;
8752
8753 TAILQ_FOREACH(list_ahd, &ahd_tailq, links) {
8754 ahd_dump_card_state(list_ahd);
8755 }
8756 }
8757
8758 int
8759 ahd_print_register(ahd_reg_parse_entry_t *table, u_int num_entries,
8760 const char *name, u_int address, u_int value,
8761 u_int *cur_column, u_int wrap_point)
8762 {
8763 int printed;
8764 u_int printed_mask;
8765
8766 if (cur_column != NULL && *cur_column >= wrap_point) {
8767 printf("\n");
8768 *cur_column = 0;
8769 }
8770 printed = printf("%s[0x%x]", name, value);
8771 if (table == NULL) {
8772 printed += printf(" ");
8773 *cur_column += printed;
8774 return (printed);
8775 }
8776 printed_mask = 0;
8777 while (printed_mask != 0xFF) {
8778 int entry;
8779
8780 for (entry = 0; entry < num_entries; entry++) {
8781 if (((value & table[entry].mask)
8782 != table[entry].value)
8783 || ((printed_mask & table[entry].mask)
8784 == table[entry].mask))
8785 continue;
8786
8787 printed += printf("%s%s",
8788 printed_mask == 0 ? ":(" : "|",
8789 table[entry].name);
8790 printed_mask |= table[entry].mask;
8791
8792 break;
8793 }
8794 if (entry >= num_entries)
8795 break;
8796 }
8797 if (printed_mask != 0)
8798 printed += printf(") ");
8799 else
8800 printed += printf(" ");
8801 if (cur_column != NULL)
8802 *cur_column += printed;
8803 return (printed);
8804 }
8805
8806 void
8807 ahd_dump_card_state(struct ahd_softc *ahd)
8808 {
8809 struct scb *scb;
8810 ahd_mode_state saved_modes;
8811 u_int dffstat;
8812 int paused;
8813 u_int scb_index;
8814 u_int saved_scb_index;
8815 u_int cur_col;
8816 int i;
8817
8818 if (ahd_is_paused(ahd)) {
8819 paused = 1;
8820 } else {
8821 paused = 0;
8822 ahd_pause(ahd);
8823 }
8824 saved_modes = ahd_save_modes(ahd);
8825 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
8826 printf(">>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<\n"
8827 "%s: Dumping Card State at program address 0x%x Mode 0x%x\n",
8828 ahd_name(ahd),
8829 ahd_inb(ahd, CURADDR) | (ahd_inb(ahd, CURADDR+1) << 8),
8830 ahd_build_mode_state(ahd, ahd->saved_src_mode,
8831 ahd->saved_dst_mode));
8832 if (paused)
8833 printf("Card was paused\n");
8834
8835 if (ahd_check_cmdcmpltqueues(ahd))
8836 printf("Completions are pending\n");
8837
8838 /*
8839 * Mode independent registers.
8840 */
8841 cur_col = 0;
8842 ahd_hs_mailbox_print(ahd_inb(ahd, LOCAL_HS_MAILBOX), &cur_col, 50);
8843 ahd_intctl_print(ahd_inb(ahd, INTCTL), &cur_col, 50);
8844 ahd_seqintstat_print(ahd_inb(ahd, SEQINTSTAT), &cur_col, 50);
8845 ahd_saved_mode_print(ahd_inb(ahd, SAVED_MODE), &cur_col, 50);
8846 ahd_dffstat_print(ahd_inb(ahd, DFFSTAT), &cur_col, 50);
8847 ahd_scsisigi_print(ahd_inb(ahd, SCSISIGI), &cur_col, 50);
8848 ahd_scsiphase_print(ahd_inb(ahd, SCSIPHASE), &cur_col, 50);
8849 ahd_scsibus_print(ahd_inb(ahd, SCSIBUS), &cur_col, 50);
8850 ahd_lastphase_print(ahd_inb(ahd, LASTPHASE), &cur_col, 50);
8851 ahd_scsiseq0_print(ahd_inb(ahd, SCSISEQ0), &cur_col, 50);
8852 ahd_scsiseq1_print(ahd_inb(ahd, SCSISEQ1), &cur_col, 50);
8853 ahd_seqctl0_print(ahd_inb(ahd, SEQCTL0), &cur_col, 50);
8854 ahd_seqintctl_print(ahd_inb(ahd, SEQINTCTL), &cur_col, 50);
8855 ahd_seq_flags_print(ahd_inb(ahd, SEQ_FLAGS), &cur_col, 50);
8856 ahd_seq_flags2_print(ahd_inb(ahd, SEQ_FLAGS2), &cur_col, 50);
8857 ahd_sstat0_print(ahd_inb(ahd, SSTAT0), &cur_col, 50);
8858 ahd_sstat1_print(ahd_inb(ahd, SSTAT1), &cur_col, 50);
8859 ahd_sstat2_print(ahd_inb(ahd, SSTAT2), &cur_col, 50);
8860 ahd_sstat3_print(ahd_inb(ahd, SSTAT3), &cur_col, 50);
8861 ahd_perrdiag_print(ahd_inb(ahd, PERRDIAG), &cur_col, 50);
8862 ahd_simode1_print(ahd_inb(ahd, SIMODE1), &cur_col, 50);
8863 ahd_lqistat0_print(ahd_inb(ahd, LQISTAT0), &cur_col, 50);
8864 ahd_lqistat1_print(ahd_inb(ahd, LQISTAT1), &cur_col, 50);
8865 ahd_lqistat2_print(ahd_inb(ahd, LQISTAT2), &cur_col, 50);
8866 ahd_lqostat0_print(ahd_inb(ahd, LQOSTAT0), &cur_col, 50);
8867 ahd_lqostat1_print(ahd_inb(ahd, LQOSTAT1), &cur_col, 50);
8868 ahd_lqostat2_print(ahd_inb(ahd, LQOSTAT2), &cur_col, 50);
8869 printf("\n");
8870 printf("\nSCB Count = %d CMDS_PENDING = %d LASTSCB 0x%x "
8871 "CURRSCB 0x%x NEXTSCB 0x%x\n",
8872 ahd->scb_data.numscbs, ahd_inw(ahd, CMDS_PENDING),
8873 ahd_inw(ahd, LASTSCB), ahd_inw(ahd, CURRSCB),
8874 ahd_inw(ahd, NEXTSCB));
8875 cur_col = 0;
8876 /* QINFIFO */
8877 ahd_search_qinfifo(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
8878 CAM_LUN_WILDCARD, SCB_LIST_NULL,
8879 ROLE_UNKNOWN, /*status*/0, SEARCH_PRINT);
8880 saved_scb_index = ahd_get_scbptr(ahd);
8881 printf("Pending list:");
8882 i = 0;
8883 LIST_FOREACH(scb, &ahd->pending_scbs, pending_links) {
8884 if (i++ > AHD_SCB_MAX)
8885 break;
8886 cur_col = printf("\n%3d FIFO_USE[0x%x] ", SCB_GET_TAG(scb),
8887 ahd_inb_scbram(ahd, SCB_FIFO_USE_COUNT));
8888 ahd_set_scbptr(ahd, SCB_GET_TAG(scb));
8889 ahd_scb_control_print(ahd_inb_scbram(ahd, SCB_CONTROL),
8890 &cur_col, 60);
8891 ahd_scb_scsiid_print(ahd_inb_scbram(ahd, SCB_SCSIID),
8892 &cur_col, 60);
8893 }
8894 printf("\nTotal %d\n", i);
8895
8896 printf("Kernel Free SCB list: ");
8897 i = 0;
8898 TAILQ_FOREACH(scb, &ahd->scb_data.free_scbs, links.tqe) {
8899 struct scb *list_scb;
8900
8901 list_scb = scb;
8902 do {
8903 printf("%d ", SCB_GET_TAG(list_scb));
8904 list_scb = LIST_NEXT(list_scb, collision_links);
8905 } while (list_scb && i++ < AHD_SCB_MAX);
8906 }
8907
8908 LIST_FOREACH(scb, &ahd->scb_data.any_dev_free_scb_list, links.le) {
8909 if (i++ > AHD_SCB_MAX)
8910 break;
8911 printf("%d ", SCB_GET_TAG(scb));
8912 }
8913 printf("\n");
8914
8915 printf("Sequencer Complete DMA-inprog list: ");
8916 scb_index = ahd_inw(ahd, COMPLETE_SCB_DMAINPROG_HEAD);
8917 i = 0;
8918 while (!SCBID_IS_NULL(scb_index) && i++ < AHD_SCB_MAX) {
8919 ahd_set_scbptr(ahd, scb_index);
8920 printf("%d ", scb_index);
8921 scb_index = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE);
8922 }
8923 printf("\n");
8924
8925 printf("Sequencer Complete list: ");
8926 scb_index = ahd_inw(ahd, COMPLETE_SCB_HEAD);
8927 i = 0;
8928 while (!SCBID_IS_NULL(scb_index) && i++ < AHD_SCB_MAX) {
8929 ahd_set_scbptr(ahd, scb_index);
8930 printf("%d ", scb_index);
8931 scb_index = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE);
8932 }
8933 printf("\n");
8934
8935
8936 printf("Sequencer DMA-Up and Complete list: ");
8937 scb_index = ahd_inw(ahd, COMPLETE_DMA_SCB_HEAD);
8938 i = 0;
8939 while (!SCBID_IS_NULL(scb_index) && i++ < AHD_SCB_MAX) {
8940 ahd_set_scbptr(ahd, scb_index);
8941 printf("%d ", scb_index);
8942 scb_index = ahd_inw_scbram(ahd, SCB_NEXT_COMPLETE);
8943 }
8944 printf("\n");
8945 ahd_set_scbptr(ahd, saved_scb_index);
8946 dffstat = ahd_inb(ahd, DFFSTAT);
8947 for (i = 0; i < 2; i++) {
8948 #ifdef AHD_DEBUG
8949 struct scb *fifo_scb;
8950 #endif
8951 u_int fifo_scbptr;
8952
8953 ahd_set_modes(ahd, AHD_MODE_DFF0 + i, AHD_MODE_DFF0 + i);
8954 fifo_scbptr = ahd_get_scbptr(ahd);
8955 printf("\n%s: FIFO%d %s, LONGJMP == 0x%x, SCB 0x%x\n",
8956 ahd_name(ahd), i,
8957 (dffstat & (FIFO0FREE << i)) ? "Free" : "Active",
8958 ahd_inw(ahd, LONGJMP_ADDR), fifo_scbptr);
8959 cur_col = 0;
8960 ahd_seqimode_print(ahd_inb(ahd, SEQIMODE), &cur_col, 50);
8961 ahd_seqintsrc_print(ahd_inb(ahd, SEQINTSRC), &cur_col, 50);
8962 ahd_dfcntrl_print(ahd_inb(ahd, DFCNTRL), &cur_col, 50);
8963 ahd_dfstatus_print(ahd_inb(ahd, DFSTATUS), &cur_col, 50);
8964 ahd_sg_cache_shadow_print(ahd_inb(ahd, SG_CACHE_SHADOW),
8965 &cur_col, 50);
8966 ahd_sg_state_print(ahd_inb(ahd, SG_STATE), &cur_col, 50);
8967 ahd_dffsxfrctl_print(ahd_inb(ahd, DFFSXFRCTL), &cur_col, 50);
8968 ahd_soffcnt_print(ahd_inb(ahd, SOFFCNT), &cur_col, 50);
8969 ahd_mdffstat_print(ahd_inb(ahd, MDFFSTAT), &cur_col, 50);
8970 if (cur_col > 50) {
8971 printf("\n");
8972 cur_col = 0;
8973 }
8974 cur_col += printf("SHADDR = 0x%x%x, SHCNT = 0x%x ",
8975 ahd_inl(ahd, SHADDR+4),
8976 ahd_inl(ahd, SHADDR),
8977 (ahd_inb(ahd, SHCNT)
8978 | (ahd_inb(ahd, SHCNT + 1) << 8)
8979 | (ahd_inb(ahd, SHCNT + 2) << 16)));
8980 if (cur_col > 50) {
8981 printf("\n");
8982 cur_col = 0;
8983 }
8984 cur_col += printf("HADDR = 0x%x%x, HCNT = 0x%x ",
8985 ahd_inl(ahd, HADDR+4),
8986 ahd_inl(ahd, HADDR),
8987 (ahd_inb(ahd, HCNT)
8988 | (ahd_inb(ahd, HCNT + 1) << 8)
8989 | (ahd_inb(ahd, HCNT + 2) << 16)));
8990 ahd_ccsgctl_print(ahd_inb(ahd, CCSGCTL), &cur_col, 50);
8991 #ifdef AHD_DEBUG
8992 if ((ahd_debug & AHD_SHOW_SG) != 0) {
8993 fifo_scb = ahd_lookup_scb(ahd, fifo_scbptr);
8994 if (fifo_scb != NULL)
8995 ahd_dump_sglist(fifo_scb);
8996 }
8997 #endif
8998 }
8999 printf("\nLQIN: ");
9000 for (i = 0; i < 20; i++)
9001 printf("0x%x ", ahd_inb(ahd, LQIN + i));
9002 printf("\n");
9003 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
9004 printf("%s: LQISTATE = 0x%x, LQOSTATE = 0x%x, OPTIONMODE = 0x%x\n",
9005 ahd_name(ahd), ahd_inb(ahd, LQISTATE), ahd_inb(ahd, LQOSTATE),
9006 ahd_inb(ahd, OPTIONMODE));
9007 printf("%s: OS_SPACE_CNT = 0x%x MAXCMDCNT = 0x%x\n",
9008 ahd_name(ahd), ahd_inb(ahd, OS_SPACE_CNT),
9009 ahd_inb(ahd, MAXCMDCNT));
9010 ahd_simode0_print(ahd_inb(ahd, SIMODE0), &cur_col, 50);
9011 printf("\n");
9012 ahd_set_modes(ahd, AHD_MODE_CCHAN, AHD_MODE_CCHAN);
9013 cur_col = 0;
9014 ahd_ccscbctl_print(ahd_inb(ahd, CCSCBCTL), &cur_col, 50);
9015 printf("\n");
9016 ahd_set_modes(ahd, ahd->saved_src_mode, ahd->saved_dst_mode);
9017 printf("%s: REG0 == 0x%x, SINDEX = 0x%x, DINDEX = 0x%x\n",
9018 ahd_name(ahd), ahd_inw(ahd, REG0), ahd_inw(ahd, SINDEX),
9019 ahd_inw(ahd, DINDEX));
9020 printf("%s: SCBPTR == 0x%x, SCB_NEXT == 0x%x, SCB_NEXT2 == 0x%x\n",
9021 ahd_name(ahd), ahd_get_scbptr(ahd),
9022 ahd_inw_scbram(ahd, SCB_NEXT),
9023 ahd_inw_scbram(ahd, SCB_NEXT2));
9024 printf("CDB %x %x %x %x %x %x\n",
9025 ahd_inb_scbram(ahd, SCB_CDB_STORE),
9026 ahd_inb_scbram(ahd, SCB_CDB_STORE+1),
9027 ahd_inb_scbram(ahd, SCB_CDB_STORE+2),
9028 ahd_inb_scbram(ahd, SCB_CDB_STORE+3),
9029 ahd_inb_scbram(ahd, SCB_CDB_STORE+4),
9030 ahd_inb_scbram(ahd, SCB_CDB_STORE+5));
9031 printf("STACK:");
9032 for (i = 0; i < ahd->stack_size; i++) {
9033 ahd->saved_stack[i] =
9034 ahd_inb(ahd, STACK)|(ahd_inb(ahd, STACK) << 8);
9035 printf(" 0x%x", ahd->saved_stack[i]);
9036 }
9037 for (i = ahd->stack_size-1; i >= 0; i--) {
9038 ahd_outb(ahd, STACK, ahd->saved_stack[i] & 0xFF);
9039 ahd_outb(ahd, STACK, (ahd->saved_stack[i] >> 8) & 0xFF);
9040 }
9041 printf("\n<<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>\n");
9042 ahd_platform_dump_card_state(ahd);
9043 ahd_restore_modes(ahd, saved_modes);
9044 if (paused == 0)
9045 ahd_unpause(ahd);
9046 }
9047
9048 void
9049 ahd_dump_scbs(struct ahd_softc *ahd)
9050 {
9051 ahd_mode_state saved_modes;
9052 u_int saved_scb_index;
9053 int i;
9054
9055 saved_modes = ahd_save_modes(ahd);
9056 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
9057 saved_scb_index = ahd_get_scbptr(ahd);
9058 for (i = 0; i < AHD_SCB_MAX; i++) {
9059 ahd_set_scbptr(ahd, i);
9060 printf("%3d", i);
9061 printf("(CTRL 0x%x ID 0x%x N 0x%x N2 0x%x SG 0x%x, RSG 0x%x)\n",
9062 ahd_inb_scbram(ahd, SCB_CONTROL),
9063 ahd_inb_scbram(ahd, SCB_SCSIID),
9064 ahd_inw_scbram(ahd, SCB_NEXT),
9065 ahd_inw_scbram(ahd, SCB_NEXT2),
9066 ahd_inl_scbram(ahd, SCB_SGPTR),
9067 ahd_inl_scbram(ahd, SCB_RESIDUAL_SGPTR));
9068 }
9069 printf("\n");
9070 ahd_set_scbptr(ahd, saved_scb_index);
9071 ahd_restore_modes(ahd, saved_modes);
9072 }
9073
9074 /**************************** Flexport Logic **********************************/
9075 /*
9076 * Read count 16bit words from 16bit word address start_addr from the
9077 * SEEPROM attached to the controller, into buf, using the controller's
9078 * SEEPROM reading state machine. Optionally treat the data as a byte
9079 * stream in terms of byte order.
9080 */
9081 int
9082 ahd_read_seeprom(struct ahd_softc *ahd, uint16_t *buf,
9083 u_int start_addr, u_int count, int bytestream)
9084 {
9085 u_int cur_addr;
9086 u_int end_addr;
9087 int error;
9088
9089 /*
9090 * If we never make it through the loop even once,
9091 * we were passed invalid arguments.
9092 */
9093 error = EINVAL;
9094 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
9095 end_addr = start_addr + count;
9096 for (cur_addr = start_addr; cur_addr < end_addr; cur_addr++) {
9097
9098 ahd_outb(ahd, SEEADR, cur_addr);
9099 ahd_outb(ahd, SEECTL, SEEOP_READ | SEESTART);
9100
9101 error = ahd_wait_seeprom(ahd);
9102 if (error)
9103 break;
9104 if (bytestream != 0) {
9105 uint8_t *bytestream_ptr;
9106
9107 bytestream_ptr = (uint8_t *)buf;
9108 *bytestream_ptr++ = ahd_inb(ahd, SEEDAT);
9109 *bytestream_ptr = ahd_inb(ahd, SEEDAT+1);
9110 } else {
9111 /*
9112 * ahd_inw() already handles machine byte order.
9113 */
9114 *buf = ahd_inw(ahd, SEEDAT);
9115 }
9116 buf++;
9117 }
9118 return (error);
9119 }
9120
9121 /*
9122 * Write count 16bit words from buf, into SEEPROM attache to the
9123 * controller starting at 16bit word address start_addr, using the
9124 * controller's SEEPROM writing state machine.
9125 */
9126 int
9127 ahd_write_seeprom(struct ahd_softc *ahd, uint16_t *buf,
9128 u_int start_addr, u_int count)
9129 {
9130 u_int cur_addr;
9131 u_int end_addr;
9132 int error;
9133 int retval;
9134
9135 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
9136 error = ENOENT;
9137
9138 /* Place the chip into write-enable mode */
9139 ahd_outb(ahd, SEEADR, SEEOP_EWEN_ADDR);
9140 ahd_outb(ahd, SEECTL, SEEOP_EWEN | SEESTART);
9141 error = ahd_wait_seeprom(ahd);
9142 if (error)
9143 return (error);
9144
9145 /*
9146 * Write the data. If we don't get throught the loop at
9147 * least once, the arguments were invalid.
9148 */
9149 retval = EINVAL;
9150 end_addr = start_addr + count;
9151 for (cur_addr = start_addr; cur_addr < end_addr; cur_addr++) {
9152 ahd_outw(ahd, SEEDAT, *buf++);
9153 ahd_outb(ahd, SEEADR, cur_addr);
9154 ahd_outb(ahd, SEECTL, SEEOP_WRITE | SEESTART);
9155
9156 retval = ahd_wait_seeprom(ahd);
9157 if (retval)
9158 break;
9159 }
9160
9161 /*
9162 * Disable writes.
9163 */
9164 ahd_outb(ahd, SEEADR, SEEOP_EWDS_ADDR);
9165 ahd_outb(ahd, SEECTL, SEEOP_EWDS | SEESTART);
9166 error = ahd_wait_seeprom(ahd);
9167 if (error)
9168 return (error);
9169 return (retval);
9170 }
9171
9172 /*
9173 * Wait ~100us for the serial eeprom to satisfy our request.
9174 */
9175 int
9176 ahd_wait_seeprom(struct ahd_softc *ahd)
9177 {
9178 int cnt;
9179
9180 cnt = 20;
9181 while ((ahd_inb(ahd, SEESTAT) & (SEEARBACK|SEEBUSY)) != 0 && --cnt)
9182 ahd_delay(5);
9183
9184 if (cnt == 0)
9185 return (ETIMEDOUT);
9186 return (0);
9187 }
9188
9189 /*
9190 * Validate the two checksums in the per_channel
9191 * vital product data struct.
9192 */
9193 int
9194 ahd_verify_vpd_cksum(struct vpd_config *vpd)
9195 {
9196 int i;
9197 int maxaddr;
9198 uint32_t checksum;
9199 uint8_t *vpdarray;
9200
9201 vpdarray = (uint8_t *)vpd;
9202 maxaddr = offsetof(struct vpd_config, vpd_checksum);
9203 checksum = 0;
9204 for (i = offsetof(struct vpd_config, resource_type); i < maxaddr; i++)
9205 checksum = checksum + vpdarray[i];
9206 if (checksum == 0
9207 || (-checksum & 0xFF) != vpd->vpd_checksum)
9208 return (0);
9209
9210 checksum = 0;
9211 maxaddr = offsetof(struct vpd_config, checksum);
9212 for (i = offsetof(struct vpd_config, default_target_flags);
9213 i < maxaddr; i++)
9214 checksum = checksum + vpdarray[i];
9215 if (checksum == 0
9216 || (-checksum & 0xFF) != vpd->checksum)
9217 return (0);
9218 return (1);
9219 }
9220
9221 int
9222 ahd_verify_cksum(struct seeprom_config *sc)
9223 {
9224 int i;
9225 int maxaddr;
9226 uint32_t checksum;
9227 uint16_t *scarray;
9228
9229 maxaddr = (sizeof(*sc)/2) - 1;
9230 checksum = 0;
9231 scarray = (uint16_t *)sc;
9232
9233 for (i = 0; i < maxaddr; i++)
9234 checksum = checksum + scarray[i];
9235 if (checksum == 0
9236 || (checksum & 0xFFFF) != sc->checksum) {
9237 return (0);
9238 } else {
9239 return (1);
9240 }
9241 }
9242
9243 int
9244 ahd_acquire_seeprom(struct ahd_softc *ahd)
9245 {
9246 /*
9247 * We should be able to determine the SEEPROM type
9248 * from the flexport logic, but unfortunately not
9249 * all implementations have this logic and there is
9250 * no programatic method for determining if the logic
9251 * is present.
9252 */
9253 return (1);
9254 #if 0
9255 uint8_t seetype;
9256 int error;
9257
9258 error = ahd_read_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL, &seetype);
9259 if (error != 0
9260 || ((seetype & FLX_ROMSTAT_SEECFG) == FLX_ROMSTAT_SEE_NONE))
9261 return (0);
9262 return (1);
9263 #endif
9264 }
9265
9266 void
9267 ahd_release_seeprom(struct ahd_softc *ahd)
9268 {
9269 /* Currently a no-op */
9270 }
9271
9272 int
9273 ahd_write_flexport(struct ahd_softc *ahd, u_int addr, u_int value)
9274 {
9275 int error;
9276
9277 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
9278 if (addr > 7)
9279 panic("ahd_write_flexport: address out of range");
9280 ahd_outb(ahd, BRDCTL, BRDEN|(addr << 3));
9281 error = ahd_wait_flexport(ahd);
9282 if (error != 0)
9283 return (error);
9284 ahd_outb(ahd, BRDDAT, value);
9285 ahd_flush_device_writes(ahd);
9286 ahd_outb(ahd, BRDCTL, BRDSTB|BRDEN|(addr << 3));
9287 ahd_flush_device_writes(ahd);
9288 ahd_outb(ahd, BRDCTL, BRDEN|(addr << 3));
9289 ahd_flush_device_writes(ahd);
9290 ahd_outb(ahd, BRDCTL, 0);
9291 ahd_flush_device_writes(ahd);
9292 return (0);
9293 }
9294
9295 int
9296 ahd_read_flexport(struct ahd_softc *ahd, u_int addr, uint8_t *value)
9297 {
9298 int error;
9299
9300 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
9301 if (addr > 7)
9302 panic("ahd_read_flexport: address out of range");
9303 ahd_outb(ahd, BRDCTL, BRDRW|BRDEN|(addr << 3));
9304 error = ahd_wait_flexport(ahd);
9305 if (error != 0)
9306 return (error);
9307 *value = ahd_inb(ahd, BRDDAT);
9308 ahd_outb(ahd, BRDCTL, 0);
9309 ahd_flush_device_writes(ahd);
9310 return (0);
9311 }
9312
9313 /*
9314 * Wait at most 2 seconds for flexport arbitration to succeed.
9315 */
9316 int
9317 ahd_wait_flexport(struct ahd_softc *ahd)
9318 {
9319 int cnt;
9320
9321 AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
9322 cnt = 1000000 * 2 / 5;
9323 while ((ahd_inb(ahd, BRDCTL) & FLXARBACK) == 0 && --cnt)
9324 ahd_delay(5);
9325
9326 if (cnt == 0)
9327 return (ETIMEDOUT);
9328 return (0);
9329 }
9330
9331 /************************* Target Mode ****************************************/
9332 #ifdef AHD_TARGET_MODE
9333 cam_status
9334 ahd_find_tmode_devs(struct ahd_softc *ahd, struct cam_sim *sim, union ccb *ccb,
9335 struct ahd_tmode_tstate **tstate,
9336 struct ahd_tmode_lstate **lstate,
9337 int notfound_failure)
9338 {
9339
9340 if ((ahd->features & AHD_TARGETMODE) == 0)
9341 return (CAM_REQ_INVALID);
9342
9343 /*
9344 * Handle the 'black hole' device that sucks up
9345 * requests to unattached luns on enabled targets.
9346 */
9347 if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD
9348 && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) {
9349 *tstate = NULL;
9350 *lstate = ahd->black_hole;
9351 } else {
9352 u_int max_id;
9353
9354 max_id = (ahd->features & AHD_WIDE) ? 15 : 7;
9355 if (ccb->ccb_h.target_id > max_id)
9356 return (CAM_TID_INVALID);
9357
9358 if (ccb->ccb_h.target_lun >= AHD_NUM_LUNS)
9359 return (CAM_LUN_INVALID);
9360
9361 *tstate = ahd->enabled_targets[ccb->ccb_h.target_id];
9362 *lstate = NULL;
9363 if (*tstate != NULL)
9364 *lstate =
9365 (*tstate)->enabled_luns[ccb->ccb_h.target_lun];
9366 }
9367
9368 if (notfound_failure != 0 && *lstate == NULL)
9369 return (CAM_PATH_INVALID);
9370
9371 return (CAM_REQ_CMP);
9372 }
9373
9374 void
9375 ahd_handle_en_lun(struct ahd_softc *ahd, struct cam_sim *sim, union ccb *ccb)
9376 {
9377 #if NOT_YET
9378 struct ahd_tmode_tstate *tstate;
9379 struct ahd_tmode_lstate *lstate;
9380 struct ccb_en_lun *cel;
9381 cam_status status;
9382 u_int target;
9383 u_int lun;
9384 u_int target_mask;
9385 u_long s;
9386 char channel;
9387
9388 status = ahd_find_tmode_devs(ahd, sim, ccb, &tstate, &lstate,
9389 /*notfound_failure*/FALSE);
9390
9391 if (status != CAM_REQ_CMP) {
9392 ccb->ccb_h.status = status;
9393 return;
9394 }
9395
9396 if ((ahd->features & AHD_MULTIROLE) != 0) {
9397 u_int our_id;
9398
9399 our_id = ahd->our_id;
9400 if (ccb->ccb_h.target_id != our_id) {
9401 if ((ahd->features & AHD_MULTI_TID) != 0
9402 && (ahd->flags & AHD_INITIATORROLE) != 0) {
9403 /*
9404 * Only allow additional targets if
9405 * the initiator role is disabled.
9406 * The hardware cannot handle a re-select-in
9407 * on the initiator id during a re-select-out
9408 * on a different target id.
9409 */
9410 status = CAM_TID_INVALID;
9411 } else if ((ahd->flags & AHD_INITIATORROLE) != 0
9412 || ahd->enabled_luns > 0) {
9413 /*
9414 * Only allow our target id to change
9415 * if the initiator role is not configured
9416 * and there are no enabled luns which
9417 * are attached to the currently registered
9418 * scsi id.
9419 */
9420 status = CAM_TID_INVALID;
9421 }
9422 }
9423 }
9424
9425 if (status != CAM_REQ_CMP) {
9426 ccb->ccb_h.status = status;
9427 return;
9428 }
9429
9430 /*
9431 * We now have an id that is valid.
9432 * If we aren't in target mode, switch modes.
9433 */
9434 if ((ahd->flags & AHD_TARGETROLE) == 0
9435 && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) {
9436 u_long s;
9437
9438 printf("Configuring Target Mode\n");
9439 ahd_lock(ahd, &s);
9440 if (LIST_FIRST(&ahd->pending_scbs) != NULL) {
9441 ccb->ccb_h.status = CAM_BUSY;
9442 ahd_unlock(ahd, &s);
9443 return;
9444 }
9445 ahd->flags |= AHD_TARGETROLE;
9446 if ((ahd->features & AHD_MULTIROLE) == 0)
9447 ahd->flags &= ~AHD_INITIATORROLE;
9448 ahd_pause(ahd);
9449 ahd_loadseq(ahd);
9450 ahd_restart(ahd);
9451 ahd_unlock(ahd, &s);
9452 }
9453 cel = &ccb->cel;
9454 target = ccb->ccb_h.target_id;
9455 lun = ccb->ccb_h.target_lun;
9456 channel = SIM_CHANNEL(ahd, sim);
9457 target_mask = 0x01 << target;
9458 if (channel == 'B')
9459 target_mask <<= 8;
9460
9461 if (cel->enable != 0) {
9462 u_int scsiseq1;
9463
9464 /* Are we already enabled?? */
9465 if (lstate != NULL) {
9466 xpt_print_path(ccb->ccb_h.path);
9467 printf("Lun already enabled\n");
9468 ccb->ccb_h.status = CAM_LUN_ALRDY_ENA;
9469 return;
9470 }
9471
9472 if (cel->grp6_len != 0
9473 || cel->grp7_len != 0) {
9474 /*
9475 * Don't (yet?) support vendor
9476 * specific commands.
9477 */
9478 ccb->ccb_h.status = CAM_REQ_INVALID;
9479 printf("Non-zero Group Codes\n");
9480 return;
9481 }
9482
9483 /*
9484 * Seems to be okay.
9485 * Setup our data structures.
9486 */
9487 if (target != CAM_TARGET_WILDCARD && tstate == NULL) {
9488 tstate = ahd_alloc_tstate(ahd, target, channel);
9489 if (tstate == NULL) {
9490 xpt_print_path(ccb->ccb_h.path);
9491 printf("Couldn't allocate tstate\n");
9492 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
9493 return;
9494 }
9495 }
9496 lstate = malloc(sizeof(*lstate), M_DEVBUF, M_NOWAIT);
9497 if (lstate == NULL) {
9498 xpt_print_path(ccb->ccb_h.path);
9499 printf("Couldn't allocate lstate\n");
9500 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
9501 return;
9502 }
9503 memset(lstate, 0, sizeof(*lstate));
9504 status = xpt_create_path(&lstate->path, /*periph*/NULL,
9505 xpt_path_path_id(ccb->ccb_h.path),
9506 xpt_path_target_id(ccb->ccb_h.path),
9507 xpt_path_lun_id(ccb->ccb_h.path));
9508 if (status != CAM_REQ_CMP) {
9509 free(lstate, M_DEVBUF);
9510 xpt_print_path(ccb->ccb_h.path);
9511 printf("Couldn't allocate path\n");
9512 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
9513 return;
9514 }
9515 SLIST_INIT(&lstate->accept_tios);
9516 SLIST_INIT(&lstate->immed_notifies);
9517 ahd_lock(ahd, &s);
9518 ahd_pause(ahd);
9519 if (target != CAM_TARGET_WILDCARD) {
9520 tstate->enabled_luns[lun] = lstate;
9521 ahd->enabled_luns++;
9522
9523 if ((ahd->features & AHD_MULTI_TID) != 0) {
9524 u_int targid_mask;
9525
9526 targid_mask = ahd_inb(ahd, TARGID)
9527 | (ahd_inb(ahd, TARGID + 1) << 8);
9528
9529 targid_mask |= target_mask;
9530 ahd_outb(ahd, TARGID, targid_mask);
9531 ahd_outb(ahd, TARGID+1, (targid_mask >> 8));
9532
9533 ahd_update_scsiid(ahd, targid_mask);
9534 } else {
9535 u_int our_id;
9536 char channel;
9537
9538 channel = SIM_CHANNEL(ahd, sim);
9539 our_id = SIM_SCSI_ID(ahd, sim);
9540
9541 /*
9542 * This can only happen if selections
9543 * are not enabled
9544 */
9545 if (target != our_id) {
9546 u_int sblkctl;
9547 char cur_channel;
9548 int swap;
9549
9550 sblkctl = ahd_inb(ahd, SBLKCTL);
9551 cur_channel = (sblkctl & SELBUSB)
9552 ? 'B' : 'A';
9553 if ((ahd->features & AHD_TWIN) == 0)
9554 cur_channel = 'A';
9555 swap = cur_channel != channel;
9556 ahd->our_id = target;
9557
9558 if (swap)
9559 ahd_outb(ahd, SBLKCTL,
9560 sblkctl ^ SELBUSB);
9561
9562 ahd_outb(ahd, SCSIID, target);
9563
9564 if (swap)
9565 ahd_outb(ahd, SBLKCTL, sblkctl);
9566 }
9567 }
9568 } else
9569 ahd->black_hole = lstate;
9570 /* Allow select-in operations */
9571 if (ahd->black_hole != NULL && ahd->enabled_luns > 0) {
9572 scsiseq1 = ahd_inb(ahd, SCSISEQ_TEMPLATE);
9573 scsiseq1 |= ENSELI;
9574 ahd_outb(ahd, SCSISEQ_TEMPLATE, scsiseq1);
9575 scsiseq1 = ahd_inb(ahd, SCSISEQ1);
9576 scsiseq1 |= ENSELI;
9577 ahd_outb(ahd, SCSISEQ1, scsiseq1);
9578 }
9579 ahd_unpause(ahd);
9580 ahd_unlock(ahd, &s);
9581 ccb->ccb_h.status = CAM_REQ_CMP;
9582 xpt_print_path(ccb->ccb_h.path);
9583 printf("Lun now enabled for target mode\n");
9584 } else {
9585 struct scb *scb;
9586 int i, empty;
9587
9588 if (lstate == NULL) {
9589 ccb->ccb_h.status = CAM_LUN_INVALID;
9590 return;
9591 }
9592
9593 ahd_lock(ahd, &s);
9594
9595 ccb->ccb_h.status = CAM_REQ_CMP;
9596 LIST_FOREACH(scb, &ahd->pending_scbs, pending_links) {
9597 struct ccb_hdr *ccbh;
9598
9599 ccbh = &scb->io_ctx->ccb_h;
9600 if (ccbh->func_code == XPT_CONT_TARGET_IO
9601 && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){
9602 printf("CTIO pending\n");
9603 ccb->ccb_h.status = CAM_REQ_INVALID;
9604 ahd_unlock(ahd, &s);
9605 return;
9606 }
9607 }
9608
9609 if (SLIST_FIRST(&lstate->accept_tios) != NULL) {
9610 printf("ATIOs pending\n");
9611 ccb->ccb_h.status = CAM_REQ_INVALID;
9612 }
9613
9614 if (SLIST_FIRST(&lstate->immed_notifies) != NULL) {
9615 printf("INOTs pending\n");
9616 ccb->ccb_h.status = CAM_REQ_INVALID;
9617 }
9618
9619 if (ccb->ccb_h.status != CAM_REQ_CMP) {
9620 ahd_unlock(ahd, &s);
9621 return;
9622 }
9623
9624 xpt_print_path(ccb->ccb_h.path);
9625 printf("Target mode disabled\n");
9626 xpt_free_path(lstate->path);
9627 free(lstate, M_DEVBUF);
9628
9629 ahd_pause(ahd);
9630 /* Can we clean up the target too? */
9631 if (target != CAM_TARGET_WILDCARD) {
9632 tstate->enabled_luns[lun] = NULL;
9633 ahd->enabled_luns--;
9634 for (empty = 1, i = 0; i < 8; i++)
9635 if (tstate->enabled_luns[i] != NULL) {
9636 empty = 0;
9637 break;
9638 }
9639
9640 if (empty) {
9641 ahd_free_tstate(ahd, target, channel,
9642 /*force*/FALSE);
9643 if (ahd->features & AHD_MULTI_TID) {
9644 u_int targid_mask;
9645
9646 targid_mask = ahd_inb(ahd, TARGID)
9647 | (ahd_inb(ahd, TARGID + 1)
9648 << 8);
9649
9650 targid_mask &= ~target_mask;
9651 ahd_outb(ahd, TARGID, targid_mask);
9652 ahd_outb(ahd, TARGID+1,
9653 (targid_mask >> 8));
9654 ahd_update_scsiid(ahd, targid_mask);
9655 }
9656 }
9657 } else {
9658
9659 ahd->black_hole = NULL;
9660
9661 /*
9662 * We can't allow selections without
9663 * our black hole device.
9664 */
9665 empty = TRUE;
9666 }
9667 if (ahd->enabled_luns == 0) {
9668 /* Disallow select-in */
9669 u_int scsiseq1;
9670
9671 scsiseq1 = ahd_inb(ahd, SCSISEQ_TEMPLATE);
9672 scsiseq1 &= ~ENSELI;
9673 ahd_outb(ahd, SCSISEQ_TEMPLATE, scsiseq1);
9674 scsiseq1 = ahd_inb(ahd, SCSISEQ1);
9675 scsiseq1 &= ~ENSELI;
9676 ahd_outb(ahd, SCSISEQ1, scsiseq1);
9677
9678 if ((ahd->features & AHD_MULTIROLE) == 0) {
9679 printf("Configuring Initiator Mode\n");
9680 ahd->flags &= ~AHD_TARGETROLE;
9681 ahd->flags |= AHD_INITIATORROLE;
9682 ahd_pause(ahd);
9683 ahd_loadseq(ahd);
9684 ahd_restart(ahd);
9685 /*
9686 * Unpaused. The extra unpause
9687 * that follows is harmless.
9688 */
9689 }
9690 }
9691 ahd_unpause(ahd);
9692 ahd_unlock(ahd, &s);
9693 }
9694 #endif
9695 }
9696
9697 static void
9698 ahd_update_scsiid(struct ahd_softc *ahd, u_int targid_mask)
9699 {
9700 #if NOT_YET
9701 u_int scsiid_mask;
9702 u_int scsiid;
9703
9704 if ((ahd->features & AHD_MULTI_TID) == 0)
9705 panic("ahd_update_scsiid called on non-multitid unit\n");
9706
9707 /*
9708 * Since we will rely on the TARGID mask
9709 * for selection enables, ensure that OID
9710 * in SCSIID is not set to some other ID
9711 * that we don't want to allow selections on.
9712 */
9713 if ((ahd->features & AHD_ULTRA2) != 0)
9714 scsiid = ahd_inb(ahd, SCSIID_ULTRA2);
9715 else
9716 scsiid = ahd_inb(ahd, SCSIID);
9717 scsiid_mask = 0x1 << (scsiid & OID);
9718 if ((targid_mask & scsiid_mask) == 0) {
9719 u_int our_id;
9720
9721 /* ffs counts from 1 */
9722 our_id = ffs(targid_mask);
9723 if (our_id == 0)
9724 our_id = ahd->our_id;
9725 else
9726 our_id--;
9727 scsiid &= TID;
9728 scsiid |= our_id;
9729 }
9730 if ((ahd->features & AHD_ULTRA2) != 0)
9731 ahd_outb(ahd, SCSIID_ULTRA2, scsiid);
9732 else
9733 ahd_outb(ahd, SCSIID, scsiid);
9734 #endif
9735 }
9736
9737 void
9738 ahd_run_tqinfifo(struct ahd_softc *ahd, int paused)
9739 {
9740 struct target_cmd *cmd;
9741
9742 ahd_sync_tqinfifo(ahd, BUS_DMASYNC_POSTREAD);
9743 while ((cmd = &ahd->targetcmds[ahd->tqinfifonext])->cmd_valid != 0) {
9744
9745 /*
9746 * Only advance through the queue if we
9747 * have the resources to process the command.
9748 */
9749 if (ahd_handle_target_cmd(ahd, cmd) != 0)
9750 break;
9751
9752 cmd->cmd_valid = 0;
9753 ahd_dmamap_sync(ahd, ahd->shared_data_dmat,
9754 ahd->shared_data_dmamap,
9755 ahd_targetcmd_offset(ahd, ahd->tqinfifonext),
9756 sizeof(struct target_cmd),
9757 BUS_DMASYNC_PREREAD);
9758 ahd->tqinfifonext++;
9759
9760 /*
9761 * Lazily update our position in the target mode incoming
9762 * command queue as seen by the sequencer.
9763 */
9764 if ((ahd->tqinfifonext & (HOST_TQINPOS - 1)) == 1) {
9765 u_int hs_mailbox;
9766
9767 hs_mailbox = ahd_inb(ahd, HS_MAILBOX);
9768 hs_mailbox &= ~HOST_TQINPOS;
9769 hs_mailbox |= ahd->tqinfifonext & HOST_TQINPOS;
9770 ahd_outb(ahd, HS_MAILBOX, hs_mailbox);
9771 }
9772 }
9773 }
9774
9775 static int
9776 ahd_handle_target_cmd(struct ahd_softc *ahd, struct target_cmd *cmd)
9777 {
9778 struct ahd_tmode_tstate *tstate;
9779 struct ahd_tmode_lstate *lstate;
9780 struct ccb_accept_tio *atio;
9781 uint8_t *byte;
9782 int initiator;
9783 int target;
9784 int lun;
9785
9786 initiator = SCSIID_TARGET(ahd, cmd->scsiid);
9787 target = SCSIID_OUR_ID(cmd->scsiid);
9788 lun = (cmd->identify & MSG_IDENTIFY_LUNMASK);
9789
9790 byte = cmd->bytes;
9791 tstate = ahd->enabled_targets[target];
9792 lstate = NULL;
9793 if (tstate != NULL)
9794 lstate = tstate->enabled_luns[lun];
9795
9796 /*
9797 * Commands for disabled luns go to the black hole driver.
9798 */
9799 if (lstate == NULL)
9800 lstate = ahd->black_hole;
9801
9802 atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios);
9803 if (atio == NULL) {
9804 ahd->flags |= AHD_TQINFIFO_BLOCKED;
9805 /*
9806 * Wait for more ATIOs from the peripheral driver for this lun.
9807 */
9808 return (1);
9809 } else
9810 ahd->flags &= ~AHD_TQINFIFO_BLOCKED;
9811 #ifdef AHD_DEBUG
9812 if ((ahd_debug & AHD_SHOW_TQIN) != 0)
9813 printf("Incoming command from %d for %d:%d%s\n",
9814 initiator, target, lun,
9815 lstate == ahd->black_hole ? "(Black Holed)" : "");
9816 #endif
9817 SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle);
9818
9819 if (lstate == ahd->black_hole) {
9820 /* Fill in the wildcards */
9821 atio->ccb_h.target_id = target;
9822 atio->ccb_h.target_lun = lun;
9823 }
9824
9825 /*
9826 * Package it up and send it off to
9827 * whomever has this lun enabled.
9828 */
9829 atio->sense_len = 0;
9830 atio->init_id = initiator;
9831 if (byte[0] != 0xFF) {
9832 /* Tag was included */
9833 atio->tag_action = *byte++;
9834 atio->tag_id = *byte++;
9835 atio->ccb_h.flags = CAM_TAG_ACTION_VALID;
9836 } else {
9837 atio->ccb_h.flags = 0;
9838 }
9839 byte++;
9840
9841 /* Okay. Now determine the cdb size based on the command code */
9842 switch (*byte >> CMD_GROUP_CODE_SHIFT) {
9843 case 0:
9844 atio->cdb_len = 6;
9845 break;
9846 case 1:
9847 case 2:
9848 atio->cdb_len = 10;
9849 break;
9850 case 4:
9851 atio->cdb_len = 16;
9852 break;
9853 case 5:
9854 atio->cdb_len = 12;
9855 break;
9856 case 3:
9857 default:
9858 /* Only copy the opcode. */
9859 atio->cdb_len = 1;
9860 printf("Reserved or VU command code type encountered\n");
9861 break;
9862 }
9863
9864 memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len);
9865
9866 atio->ccb_h.status |= CAM_CDB_RECVD;
9867
9868 if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) {
9869 /*
9870 * We weren't allowed to disconnect.
9871 * We're hanging on the bus until a
9872 * continue target I/O comes in response
9873 * to this accept tio.
9874 */
9875 #ifdef AHD_DEBUG
9876 if ((ahd_debug & AHD_SHOW_TQIN) != 0)
9877 printf("Received Immediate Command %d:%d:%d - %p\n",
9878 initiator, target, lun, ahd->pending_device);
9879 #endif
9880 ahd->pending_device = lstate;
9881 ahd_freeze_ccb((union ccb *)atio);
9882 atio->ccb_h.flags |= CAM_DIS_DISCONNECT;
9883 }
9884 xpt_done((union ccb*)atio);
9885 return (0);
9886 }
9887
9888 #endif
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