1 /* $NecBSD: scsi_low.c,v 1.24.10.8 2001/06/26 07:39:44 honda Exp $ */
2 /* $NetBSD$ */
3
4 #include <sys/cdefs.h>
5 __FBSDID("$FreeBSD$");
6
7 #define SCSI_LOW_STATICS
8 #define SCSI_LOW_DEBUG
9 #define SCSI_LOW_NEGOTIATE_BEFORE_SENSE
10 #define SCSI_LOW_START_UP_CHECK
11
12 /* #define SCSI_LOW_INFO_DETAIL */
13
14 /* #define SCSI_LOW_QCLEAR_AFTER_CA */
15 /* #define SCSI_LOW_FLAGS_QUIRKS_OK */
16
17 #define SCSI_LOW_FLAGS_QUIRKS_OK
18
19 /*-
20 * SPDX-License-Identifier: BSD-3-Clause
21 *
22 * [NetBSD for NEC PC-98 series]
23 * Copyright (c) 1995, 1996, 1997, 1998, 1999, 2000, 2001
24 * NetBSD/pc98 porting staff. All rights reserved.
25 * Copyright (c) 1995, 1996, 1997, 1998, 1999, 2000, 2001
26 * Naofumi HONDA. All rights reserved.
27 *
28 * [Ported for FreeBSD CAM]
29 * Copyright (c) 2000, 2001
30 * MITSUNAGA Noriaki, NOKUBI Hirotaka and TAKAHASHI Yoshihiro.
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. The name of the author may not be used to endorse or promote products
42 * derived from this software without specific prior written permission.
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
46 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
47 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
48 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
49 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
50 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
52 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
53 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
54 * POSSIBILITY OF SUCH DAMAGE.
55 */
56
57 /* <On the nexus establishment>
58 * When our host is reselected,
59 * nexus establish processes are little complicated.
60 * Normal steps are followings:
61 * 1) Our host selected by target => target nexus (slp->sl_Tnexus)
62 * 2) Identify msgin => lun nexus (slp->sl_Lnexus)
63 * 3) Qtag msg => ccb nexus (slp->sl_Qnexus)
64 */
65 #include "opt_ddb.h"
66
67 #include <sys/param.h>
68 #include <sys/systm.h>
69 #include <sys/kernel.h>
70 #include <sys/bio.h>
71 #include <sys/buf.h>
72 #include <sys/queue.h>
73 #include <sys/malloc.h>
74 #include <sys/errno.h>
75
76 #include <cam/cam.h>
77 #include <cam/cam_ccb.h>
78 #include <cam/cam_sim.h>
79 #include <cam/cam_debug.h>
80 #include <cam/cam_periph.h>
81 #include <cam/cam_xpt_periph.h>
82
83 #include <cam/scsi/scsi_all.h>
84 #include <cam/scsi/scsi_message.h>
85
86 #include <cam/scsi/scsi_low.h>
87
88 #include <sys/cons.h>
89
90 /**************************************************************
91 * CCB Macros
92 **************************************************************/
93
94 /* (II) static allocated memory */
95 #define GENERIC_CCB_STATIC_ALLOC(DEV, CCBTYPE) \
96 static struct CCBTYPE##que CCBTYPE##que;
97
98 /* (III) functions */
99 #define GENERIC_CCB(DEV, CCBTYPE, CHAIN) \
100 \
101 void \
102 DEV##_init_ccbque(int count) \
103 { \
104 if (CCBTYPE##que.maxccb == 0) \
105 TAILQ_INIT(&CCBTYPE##que.CCBTYPE##tab); \
106 CCBTYPE##que.maxccb += count; \
107 } \
108 \
109 struct CCBTYPE * \
110 DEV##_get_ccb(void) \
111 { \
112 struct CCBTYPE *cb; \
113 \
114 if (CCBTYPE##que.count < CCBTYPE##que.maxccb) \
115 { \
116 CCBTYPE##que.count ++; \
117 cb = TAILQ_FIRST(&(CCBTYPE##que.CCBTYPE##tab)); \
118 if (cb != NULL) { \
119 TAILQ_REMOVE(&CCBTYPE##que.CCBTYPE##tab, cb, CHAIN);\
120 goto out; \
121 } else { \
122 cb = malloc(sizeof(*cb), M_DEVBUF, M_NOWAIT | M_ZERO); \
123 if (cb != NULL) \
124 goto out; \
125 } \
126 CCBTYPE##que.count --; \
127 } \
128 \
129 cb = NULL; \
130 \
131 out: \
132 return cb; \
133 } \
134 \
135 void \
136 DEV##_free_ccb(struct CCBTYPE *cb) \
137 { \
138 \
139 TAILQ_INSERT_TAIL(&CCBTYPE##que.CCBTYPE##tab, cb, CHAIN); \
140 CCBTYPE##que.count --; \
141 \
142 if (CCBTYPE##que.flags & CCB_MWANTED) \
143 { \
144 CCBTYPE##que.flags &= ~CCB_MWANTED; \
145 wakeup ((caddr_t) &CCBTYPE##que.count); \
146 } \
147 }
148
149 /**************************************************************
150 * Constants
151 **************************************************************/
152 #define SCSI_LOW_POLL_HZ 1000
153
154 /* functions return values */
155 #define SCSI_LOW_START_NO_QTAG 0
156 #define SCSI_LOW_START_QTAG 1
157
158 #define SCSI_LOW_DONE_COMPLETE 0
159 #define SCSI_LOW_DONE_RETRY 1
160
161 /* internal disk flags */
162 #define SCSI_LOW_DISK_DISC 0x00000001
163 #define SCSI_LOW_DISK_QTAG 0x00000002
164 #define SCSI_LOW_DISK_LINK 0x00000004
165 #define SCSI_LOW_DISK_PARITY 0x00000008
166 #define SCSI_LOW_DISK_SYNC 0x00010000
167 #define SCSI_LOW_DISK_WIDE_16 0x00020000
168 #define SCSI_LOW_DISK_WIDE_32 0x00040000
169 #define SCSI_LOW_DISK_WIDE (SCSI_LOW_DISK_WIDE_16 | SCSI_LOW_DISK_WIDE_32)
170 #define SCSI_LOW_DISK_LFLAGS 0x0000ffff
171 #define SCSI_LOW_DISK_TFLAGS 0xffff0000
172
173 static MALLOC_DEFINE(M_SCSILOW, "SCSI low", "SCSI low buffers");
174
175 /**************************************************************
176 * Declarations
177 **************************************************************/
178 /* static */ void scsi_low_info(struct scsi_low_softc *, struct targ_info *, u_char *);
179 static void scsi_low_engage(void *);
180 static struct slccb *scsi_low_establish_ccb(struct targ_info *, struct lun_info *, scsi_low_tag_t);
181 static int scsi_low_done(struct scsi_low_softc *, struct slccb *);
182 static int scsi_low_setup_done(struct scsi_low_softc *, struct slccb *);
183 static void scsi_low_bus_release(struct scsi_low_softc *, struct targ_info *);
184 static void scsi_low_twiddle_wait(void);
185 static struct lun_info *scsi_low_alloc_li(struct targ_info *, int, int);
186 static struct targ_info *scsi_low_alloc_ti(struct scsi_low_softc *, int);
187 static void scsi_low_calcf_lun(struct lun_info *);
188 static void scsi_low_calcf_target(struct targ_info *);
189 static void scsi_low_calcf_show(struct lun_info *);
190 static void scsi_low_reset_nexus(struct scsi_low_softc *, int);
191 static void scsi_low_reset_nexus_target(struct scsi_low_softc *, struct targ_info *, int);
192 static void scsi_low_reset_nexus_lun(struct scsi_low_softc *, struct lun_info *, int);
193 static int scsi_low_init(struct scsi_low_softc *, u_int);
194 static void scsi_low_start(struct scsi_low_softc *);
195 static void scsi_low_free_ti(struct scsi_low_softc *);
196
197 static int scsi_low_alloc_qtag(struct slccb *);
198 static int scsi_low_dealloc_qtag(struct slccb *);
199 static int scsi_low_enqueue(struct scsi_low_softc *, struct targ_info *, struct lun_info *, struct slccb *, u_int, u_int);
200 static int scsi_low_message_enqueue(struct scsi_low_softc *, struct targ_info *, struct lun_info *, u_int);
201 static void scsi_low_unit_ready_cmd(struct slccb *);
202 static void scsi_low_timeout(void *);
203 static int scsi_low_timeout_check(struct scsi_low_softc *);
204 #ifdef SCSI_LOW_START_UP_CHECK
205 static int scsi_low_start_up(struct scsi_low_softc *);
206 #endif /* SCSI_LOW_START_UP_CHECK */
207 static int scsi_low_abort_ccb(struct scsi_low_softc *, struct slccb *);
208 static struct slccb *scsi_low_revoke_ccb(struct scsi_low_softc *, struct slccb *, int);
209
210 int scsi_low_version_major = 2;
211 int scsi_low_version_minor = 17;
212
213 static struct scsi_low_softc_tab sl_tab = LIST_HEAD_INITIALIZER(sl_tab);
214 static struct mtx sl_tab_lock;
215 MTX_SYSINIT(sl_tab_lock, &sl_tab_lock, "scsi low table", MTX_DEF);
216
217 /**************************************************************
218 * Debug, Run test and Statics
219 **************************************************************/
220 #ifdef SCSI_LOW_INFO_DETAIL
221 #define SCSI_LOW_INFO(slp, ti, s) scsi_low_info((slp), (ti), (s))
222 #else /* !SCSI_LOW_INFO_DETAIL */
223 #define SCSI_LOW_INFO(slp, ti, s) device_printf((slp)->sl_dev, "%s\n", (s))
224 #endif /* !SCSI_LOW_INFO_DETAIL */
225
226 #ifdef SCSI_LOW_STATICS
227 static struct scsi_low_statics {
228 int nexus_win;
229 int nexus_fail;
230 int nexus_disconnected;
231 int nexus_reselected;
232 int nexus_conflict;
233 } scsi_low_statics;
234 #endif /* SCSI_LOW_STATICS */
235
236 #ifdef SCSI_LOW_DEBUG
237 #define SCSI_LOW_DEBUG_DONE 0x00001
238 #define SCSI_LOW_DEBUG_DISC 0x00002
239 #define SCSI_LOW_DEBUG_SENSE 0x00004
240 #define SCSI_LOW_DEBUG_CALCF 0x00008
241 #define SCSI_LOW_DEBUG_ACTION 0x10000
242 int scsi_low_debug = 0;
243
244 #define SCSI_LOW_MAX_ATTEN_CHECK 32
245 #define SCSI_LOW_ATTEN_CHECK 0x0001
246 #define SCSI_LOW_CMDLNK_CHECK 0x0002
247 #define SCSI_LOW_ABORT_CHECK 0x0004
248 #define SCSI_LOW_NEXUS_CHECK 0x0008
249 int scsi_low_test = 0;
250 int scsi_low_test_id = 0;
251
252 static void scsi_low_test_abort(struct scsi_low_softc *, struct targ_info *, struct lun_info *);
253 static void scsi_low_test_cmdlnk(struct scsi_low_softc *, struct slccb *);
254 static void scsi_low_test_atten(struct scsi_low_softc *, struct targ_info *, u_int);
255 #define SCSI_LOW_DEBUG_TEST_GO(fl, id) \
256 ((scsi_low_test & (fl)) != 0 && (scsi_low_test_id & (1 << (id))) == 0)
257 #define SCSI_LOW_DEBUG_GO(fl, id) \
258 ((scsi_low_debug & (fl)) != 0 && (scsi_low_test_id & (1 << (id))) == 0)
259 #endif /* SCSI_LOW_DEBUG */
260
261 /**************************************************************
262 * CCB
263 **************************************************************/
264 GENERIC_CCB_STATIC_ALLOC(scsi_low, slccb)
265 GENERIC_CCB(scsi_low, slccb, ccb_chain)
266
267 /**************************************************************
268 * Inline functions
269 **************************************************************/
270 #define SCSI_LOW_INLINE static __inline
271 SCSI_LOW_INLINE void scsi_low_activate_qtag(struct slccb *);
272 SCSI_LOW_INLINE void scsi_low_deactivate_qtag(struct slccb *);
273 SCSI_LOW_INLINE void scsi_low_ccb_message_assert(struct slccb *, u_int);
274 SCSI_LOW_INLINE void scsi_low_ccb_message_exec(struct scsi_low_softc *, struct slccb *);
275 SCSI_LOW_INLINE void scsi_low_ccb_message_retry(struct slccb *);
276 SCSI_LOW_INLINE void scsi_low_ccb_message_clear(struct slccb *);
277 SCSI_LOW_INLINE void scsi_low_init_msgsys(struct scsi_low_softc *, struct targ_info *);
278
279 SCSI_LOW_INLINE void
scsi_low_activate_qtag(cb)280 scsi_low_activate_qtag(cb)
281 struct slccb *cb;
282 {
283 struct lun_info *li = cb->li;
284
285 if (cb->ccb_tag != SCSI_LOW_UNKTAG)
286 return;
287
288 li->li_nqio ++;
289 cb->ccb_tag = cb->ccb_otag;
290 }
291
292 SCSI_LOW_INLINE void
scsi_low_deactivate_qtag(cb)293 scsi_low_deactivate_qtag(cb)
294 struct slccb *cb;
295 {
296 struct lun_info *li = cb->li;
297
298 if (cb->ccb_tag == SCSI_LOW_UNKTAG)
299 return;
300
301 li->li_nqio --;
302 cb->ccb_tag = SCSI_LOW_UNKTAG;
303 }
304
305 SCSI_LOW_INLINE void
scsi_low_ccb_message_exec(slp,cb)306 scsi_low_ccb_message_exec(slp, cb)
307 struct scsi_low_softc *slp;
308 struct slccb *cb;
309 {
310
311 scsi_low_assert_msg(slp, cb->ti, cb->ccb_msgoutflag, 0);
312 cb->ccb_msgoutflag = 0;
313 }
314
315 SCSI_LOW_INLINE void
scsi_low_ccb_message_assert(cb,msg)316 scsi_low_ccb_message_assert(cb, msg)
317 struct slccb *cb;
318 u_int msg;
319 {
320
321 cb->ccb_msgoutflag = cb->ccb_omsgoutflag = msg;
322 }
323
324 SCSI_LOW_INLINE void
scsi_low_ccb_message_retry(cb)325 scsi_low_ccb_message_retry(cb)
326 struct slccb *cb;
327 {
328 cb->ccb_msgoutflag = cb->ccb_omsgoutflag;
329 }
330
331 SCSI_LOW_INLINE void
scsi_low_ccb_message_clear(cb)332 scsi_low_ccb_message_clear(cb)
333 struct slccb *cb;
334 {
335 cb->ccb_msgoutflag = 0;
336 }
337
338 SCSI_LOW_INLINE void
scsi_low_init_msgsys(slp,ti)339 scsi_low_init_msgsys(slp, ti)
340 struct scsi_low_softc *slp;
341 struct targ_info *ti;
342 {
343
344 ti->ti_msginptr = 0;
345 ti->ti_emsgflags = ti->ti_msgflags = ti->ti_omsgflags = 0;
346 SCSI_LOW_DEASSERT_ATN(slp);
347 SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_NULL);
348 }
349
350 /*=============================================================
351 * START OF OS switch (All OS depend fucntions should be here)
352 =============================================================*/
353 /* common os depend utitlities */
354 #define SCSI_LOW_CMD_RESIDUAL_CHK 0x0001
355 #define SCSI_LOW_CMD_ORDERED_QTAG 0x0002
356 #define SCSI_LOW_CMD_ABORT_WARNING 0x0004
357
358 static u_int8_t scsi_low_cmd_flags[256] = {
359 /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
360 /*0*/ 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 5, 0, 0, 0, 0, 0,
361 /*1*/ 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0,
362 /*2*/ 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 5, 0, 0, 0, 5, 5,
363 /*3*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 5,
364 };
365
366 struct scsi_low_error_code {
367 int error_bits;
368 int error_code;
369 };
370
371 static struct slccb *scsi_low_find_ccb(struct scsi_low_softc *, u_int, u_int, void *);
372 static int scsi_low_translate_error_code(struct slccb *, struct scsi_low_error_code *);
373
374 static struct slccb *
scsi_low_find_ccb(slp,target,lun,osdep)375 scsi_low_find_ccb(slp, target, lun, osdep)
376 struct scsi_low_softc *slp;
377 u_int target, lun;
378 void *osdep;
379 {
380 struct targ_info *ti;
381 struct lun_info *li;
382 struct slccb *cb;
383
384 ti = slp->sl_ti[target];
385 li = scsi_low_alloc_li(ti, lun, 0);
386 if (li == NULL)
387 return NULL;
388
389 if ((cb = slp->sl_Qnexus) != NULL && cb->osdep == osdep)
390 return cb;
391
392 TAILQ_FOREACH(cb, &slp->sl_start, ccb_chain)
393 {
394 if (cb->osdep == osdep)
395 return cb;
396 }
397
398 TAILQ_FOREACH(cb, &li->li_discq, ccb_chain)
399 {
400 if (cb->osdep == osdep)
401 return cb;
402 }
403 return NULL;
404 }
405
406 static int
scsi_low_translate_error_code(cb,tp)407 scsi_low_translate_error_code(cb, tp)
408 struct slccb *cb;
409 struct scsi_low_error_code *tp;
410 {
411
412 if (cb->ccb_error == 0)
413 return tp->error_code;
414
415 for (tp ++; (cb->ccb_error & tp->error_bits) == 0; tp ++)
416 ;
417 return tp->error_code;
418 }
419
420 /**************************************************************
421 * SCSI INTERFACE (CAM)
422 **************************************************************/
423 #define SCSI_LOW_MALLOC(size) malloc((size), M_SCSILOW, M_NOWAIT)
424 #define SCSI_LOW_FREE(pt) free((pt), M_SCSILOW)
425 #define SCSI_LOW_ALLOC_CCB(flags) scsi_low_get_ccb()
426
427 static void scsi_low_poll_cam(struct cam_sim *);
428 void scsi_low_scsi_action_cam(struct cam_sim *, union ccb *);
429
430 static int scsi_low_attach_cam(struct scsi_low_softc *);
431 static int scsi_low_detach_cam(struct scsi_low_softc *);
432 static int scsi_low_ccb_setup_cam(struct scsi_low_softc *, struct slccb *);
433 static int scsi_low_done_cam(struct scsi_low_softc *, struct slccb *);
434
435 struct scsi_low_error_code scsi_low_error_code_cam[] = {
436 {0, CAM_REQ_CMP},
437 {SENSEIO, CAM_AUTOSNS_VALID | CAM_REQ_CMP_ERR},
438 {SENSEERR, CAM_AUTOSENSE_FAIL},
439 {UACAERR, CAM_SCSI_STATUS_ERROR},
440 {BUSYERR | STATERR, CAM_SCSI_STATUS_ERROR},
441 {SELTIMEOUTIO, CAM_SEL_TIMEOUT},
442 {TIMEOUTIO, CAM_CMD_TIMEOUT},
443 {PDMAERR, CAM_DATA_RUN_ERR},
444 {PARITYERR, CAM_UNCOR_PARITY},
445 {UBFERR, CAM_UNEXP_BUSFREE},
446 {ABORTIO, CAM_REQ_ABORTED},
447 {-1, CAM_UNREC_HBA_ERROR}
448 };
449
450 #define SIM2SLP(sim) ((struct scsi_low_softc *) cam_sim_softc((sim)))
451
452 /* XXX:
453 * Please check a polling hz, currently we assume scsi_low_poll() is
454 * called each 1 ms.
455 */
456 #define SCSI_LOW_CAM_POLL_HZ 1000 /* OK ? */
457
458 static void
scsi_low_poll_cam(sim)459 scsi_low_poll_cam(sim)
460 struct cam_sim *sim;
461 {
462 struct scsi_low_softc *slp = SIM2SLP(sim);
463
464 SCSI_LOW_ASSERT_LOCKED(slp);
465 (*slp->sl_funcs->scsi_low_poll) (slp);
466
467 if (slp->sl_poll_count ++ >=
468 SCSI_LOW_CAM_POLL_HZ / SCSI_LOW_TIMEOUT_HZ)
469 {
470 slp->sl_poll_count = 0;
471 scsi_low_timeout_check(slp);
472 }
473 }
474
475 void
scsi_low_scsi_action_cam(sim,ccb)476 scsi_low_scsi_action_cam(sim, ccb)
477 struct cam_sim *sim;
478 union ccb *ccb;
479 {
480 struct scsi_low_softc *slp = SIM2SLP(sim);
481 struct targ_info *ti;
482 struct lun_info *li;
483 struct slccb *cb;
484 u_int lun, flags, msg, target;
485 int rv;
486
487 SCSI_LOW_ASSERT_LOCKED(slp);
488 target = (u_int) (ccb->ccb_h.target_id);
489 lun = (u_int) ccb->ccb_h.target_lun;
490
491 #ifdef SCSI_LOW_DEBUG
492 if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_ACTION, target) != 0)
493 {
494 device_printf(slp->sl_dev,
495 "cam_action: func code 0x%x target: %d, lun: %d\n",
496 ccb->ccb_h.func_code, target, lun);
497 }
498 #endif /* SCSI_LOW_DEBUG */
499
500 switch (ccb->ccb_h.func_code) {
501 case XPT_SCSI_IO: /* Execute the requested I/O operation */
502 #ifdef SCSI_LOW_DIAGNOSTIC
503 if (target == CAM_TARGET_WILDCARD || lun == CAM_LUN_WILDCARD)
504 {
505 device_printf(slp->sl_dev, "invalid target/lun\n");
506 ccb->ccb_h.status = CAM_REQ_INVALID;
507 xpt_done(ccb);
508 return;
509 }
510 #endif /* SCSI_LOW_DIAGNOSTIC */
511
512 if (((cb = SCSI_LOW_ALLOC_CCB(1)) == NULL)) {
513 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
514 xpt_done(ccb);
515 return;
516 }
517
518 ti = slp->sl_ti[target];
519 cb->osdep = ccb;
520 cb->bp = NULL;
521 if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0)
522 flags = CCB_AUTOSENSE | CCB_SCSIIO;
523 else
524 flags = CCB_SCSIIO;
525
526 li = scsi_low_alloc_li(ti, lun, 1);
527
528 if (ti->ti_setup_msg != 0)
529 {
530 scsi_low_message_enqueue(slp, ti, li, CCB_AUTOSENSE);
531 }
532
533 scsi_low_enqueue(slp, ti, li, cb, flags, 0);
534
535 #ifdef SCSI_LOW_DEBUG
536 if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_ABORT_CHECK, target) != 0)
537 {
538 scsi_low_test_abort(slp, ti, li);
539 }
540 #endif /* SCSI_LOW_DEBUG */
541 break;
542
543 case XPT_ABORT: /* Abort the specified CCB */
544 #ifdef SCSI_LOW_DIAGNOSTIC
545 if (target == CAM_TARGET_WILDCARD || lun == CAM_LUN_WILDCARD)
546 {
547 device_printf(slp->sl_dev, "invalid target/lun\n");
548 ccb->ccb_h.status = CAM_REQ_INVALID;
549 xpt_done(ccb);
550 return;
551 }
552 #endif /* SCSI_LOW_DIAGNOSTIC */
553
554 cb = scsi_low_find_ccb(slp, target, lun, ccb->cab.abort_ccb);
555 rv = scsi_low_abort_ccb(slp, cb);
556
557 if (rv == 0)
558 ccb->ccb_h.status = CAM_REQ_CMP;
559 else
560 ccb->ccb_h.status = CAM_REQ_INVALID;
561 xpt_done(ccb);
562 break;
563
564 case XPT_SET_TRAN_SETTINGS: {
565 struct ccb_trans_settings_scsi *scsi;
566 struct ccb_trans_settings_spi *spi;
567 struct ccb_trans_settings *cts;
568 u_int val;
569
570 #ifdef SCSI_LOW_DIAGNOSTIC
571 if (target == CAM_TARGET_WILDCARD)
572 {
573 device_printf(slp->sl_dev, "invalid target\n");
574 ccb->ccb_h.status = CAM_REQ_INVALID;
575 xpt_done(ccb);
576 return;
577 }
578 #endif /* SCSI_LOW_DIAGNOSTIC */
579 cts = &ccb->cts;
580 ti = slp->sl_ti[target];
581 if (lun == CAM_LUN_WILDCARD)
582 lun = 0;
583
584 scsi = &cts->proto_specific.scsi;
585 spi = &cts->xport_specific.spi;
586 if ((spi->valid & (CTS_SPI_VALID_BUS_WIDTH |
587 CTS_SPI_VALID_SYNC_RATE |
588 CTS_SPI_VALID_SYNC_OFFSET)) != 0)
589 {
590 if (spi->valid & CTS_SPI_VALID_BUS_WIDTH) {
591 val = spi->bus_width;
592 if (val < ti->ti_width)
593 ti->ti_width = val;
594 }
595 if (spi->valid & CTS_SPI_VALID_SYNC_RATE) {
596 val = spi->sync_period;
597 if (val == 0 || val > ti->ti_maxsynch.period)
598 ti->ti_maxsynch.period = val;
599 }
600 if (spi->valid & CTS_SPI_VALID_SYNC_OFFSET) {
601 val = spi->sync_offset;
602 if (val < ti->ti_maxsynch.offset)
603 ti->ti_maxsynch.offset = val;
604 }
605 ti->ti_flags_valid |= SCSI_LOW_TARG_FLAGS_QUIRKS_VALID;
606 scsi_low_calcf_target(ti);
607 }
608
609 if ((spi->valid & CTS_SPI_FLAGS_DISC_ENB) != 0 ||
610 (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) {
611
612 li = scsi_low_alloc_li(ti, lun, 1);
613 if (spi->valid & CTS_SPI_FLAGS_DISC_ENB) {
614 li->li_quirks |= SCSI_LOW_DISK_DISC;
615 } else {
616 li->li_quirks &= ~SCSI_LOW_DISK_DISC;
617 }
618
619 if (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) {
620 li->li_quirks |= SCSI_LOW_DISK_QTAG;
621 } else {
622 li->li_quirks &= ~SCSI_LOW_DISK_QTAG;
623 }
624 li->li_flags_valid |= SCSI_LOW_LUN_FLAGS_QUIRKS_VALID;
625 scsi_low_calcf_target(ti);
626 scsi_low_calcf_lun(li);
627 if ((slp->sl_show_result & SHOW_CALCF_RES) != 0)
628 scsi_low_calcf_show(li);
629 }
630
631 ccb->ccb_h.status = CAM_REQ_CMP;
632 xpt_done(ccb);
633 break;
634 }
635
636 case XPT_GET_TRAN_SETTINGS: {
637 struct ccb_trans_settings *cts;
638 u_int diskflags;
639
640 cts = &ccb->cts;
641 #ifdef SCSI_LOW_DIAGNOSTIC
642 if (target == CAM_TARGET_WILDCARD)
643 {
644 device_printf(slp->sl_dev, "invalid target\n");
645 ccb->ccb_h.status = CAM_REQ_INVALID;
646 xpt_done(ccb);
647 return;
648 }
649 #endif /* SCSI_LOW_DIAGNOSTIC */
650 ti = slp->sl_ti[target];
651 if (lun == CAM_LUN_WILDCARD)
652 lun = 0;
653
654 li = scsi_low_alloc_li(ti, lun, 1);
655 if (li != NULL && cts->type == CTS_TYPE_CURRENT_SETTINGS) {
656 struct ccb_trans_settings_scsi *scsi =
657 &cts->proto_specific.scsi;
658 struct ccb_trans_settings_spi *spi =
659 &cts->xport_specific.spi;
660 #ifdef SCSI_LOW_DIAGNOSTIC
661 if (li->li_flags_valid != SCSI_LOW_LUN_FLAGS_ALL_VALID)
662 {
663 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
664 device_printf(slp->sl_dev,
665 "invalid GET_TRANS_CURRENT_SETTINGS call\n");
666 goto settings_out;
667 }
668 #endif /* SCSI_LOW_DIAGNOSTIC */
669 cts->protocol = PROTO_SCSI;
670 cts->protocol_version = SCSI_REV_2;
671 cts->transport = XPORT_SPI;
672 cts->transport_version = 2;
673
674 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
675 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
676
677 diskflags = li->li_diskflags & li->li_cfgflags;
678 if (diskflags & SCSI_LOW_DISK_DISC)
679 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
680 if (diskflags & SCSI_LOW_DISK_QTAG)
681 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
682
683 spi->sync_period = ti->ti_maxsynch.period;
684 spi->valid |= CTS_SPI_VALID_SYNC_RATE;
685 spi->sync_offset = ti->ti_maxsynch.offset;
686 spi->valid |= CTS_SPI_VALID_SYNC_OFFSET;
687
688 spi->valid |= CTS_SPI_VALID_BUS_WIDTH;
689 spi->bus_width = ti->ti_width;
690
691 if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
692 scsi->valid = CTS_SCSI_VALID_TQ;
693 spi->valid |= CTS_SPI_VALID_DISC;
694 } else
695 scsi->valid = 0;
696 } else
697 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
698 settings_out:
699 xpt_done(ccb);
700 break;
701 }
702
703 case XPT_CALC_GEOMETRY: { /* not yet HN2 */
704 cam_calc_geometry(&ccb->ccg, /*extended*/1);
705 xpt_done(ccb);
706 break;
707 }
708
709 case XPT_RESET_BUS: /* Reset the specified SCSI bus */
710 scsi_low_restart(slp, SCSI_LOW_RESTART_HARD, NULL);
711 ccb->ccb_h.status = CAM_REQ_CMP;
712 xpt_done(ccb);
713 break;
714
715 case XPT_TERM_IO: /* Terminate the I/O process */
716 ccb->ccb_h.status = CAM_REQ_INVALID;
717 xpt_done(ccb);
718 break;
719
720 case XPT_RESET_DEV: /* Bus Device Reset the specified SCSI device */
721 #ifdef SCSI_LOW_DIAGNOSTIC
722 if (target == CAM_TARGET_WILDCARD)
723 {
724 device_printf(slp->sl_dev, "invalid target\n");
725 ccb->ccb_h.status = CAM_REQ_INVALID;
726 xpt_done(ccb);
727 return;
728 }
729 #endif /* SCSI_LOW_DIAGNOSTIC */
730
731 msg = SCSI_LOW_MSG_RESET;
732 if (((cb = SCSI_LOW_ALLOC_CCB(1)) == NULL))
733 {
734 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
735 xpt_done(ccb);
736 return;
737 }
738
739 ti = slp->sl_ti[target];
740 if (lun == CAM_LUN_WILDCARD)
741 lun = 0;
742 cb->osdep = ccb;
743 cb->bp = NULL;
744 if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0)
745 flags = CCB_AUTOSENSE | CCB_NORETRY | CCB_URGENT;
746 else
747 flags = CCB_NORETRY | CCB_URGENT;
748
749 li = scsi_low_alloc_li(ti, lun, 1);
750 scsi_low_enqueue(slp, ti, li, cb, flags, msg);
751 break;
752
753 case XPT_PATH_INQ: { /* Path routing inquiry */
754 struct ccb_pathinq *cpi = &ccb->cpi;
755
756 cpi->version_num = scsi_low_version_major;
757 cpi->hba_inquiry = PI_TAG_ABLE | PI_LINKED_CDB;
758 ti = slp->sl_ti[slp->sl_hostid]; /* host id */
759 if (ti->ti_width > SCSI_LOW_BUS_WIDTH_8)
760 cpi->hba_inquiry |= PI_WIDE_16;
761 if (ti->ti_width > SCSI_LOW_BUS_WIDTH_16)
762 cpi->hba_inquiry |= PI_WIDE_32;
763 if (ti->ti_maxsynch.offset > 0)
764 cpi->hba_inquiry |= PI_SDTR_ABLE;
765 cpi->target_sprt = 0;
766 cpi->hba_misc = 0;
767 cpi->hba_eng_cnt = 0;
768 cpi->max_target = slp->sl_ntargs - 1;
769 cpi->max_lun = slp->sl_nluns - 1;
770 cpi->initiator_id = slp->sl_hostid;
771 cpi->bus_id = cam_sim_bus(sim);
772 cpi->base_transfer_speed = 3300;
773 cpi->transport = XPORT_SPI;
774 cpi->transport_version = 2;
775 cpi->protocol = PROTO_SCSI;
776 cpi->protocol_version = SCSI_REV_2;
777 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
778 strlcpy(cpi->hba_vid, "SCSI_LOW", HBA_IDLEN);
779 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
780 cpi->unit_number = cam_sim_unit(sim);
781 cpi->ccb_h.status = CAM_REQ_CMP;
782 xpt_done(ccb);
783 break;
784 }
785
786 default:
787 printf("scsi_low: non support func_code = %d ",
788 ccb->ccb_h.func_code);
789 ccb->ccb_h.status = CAM_REQ_INVALID;
790 xpt_done(ccb);
791 break;
792 }
793 }
794
795 static int
scsi_low_attach_cam(slp)796 scsi_low_attach_cam(slp)
797 struct scsi_low_softc *slp;
798 {
799 struct cam_devq *devq;
800 int tagged_openings;
801
802 devq = cam_simq_alloc(SCSI_LOW_NCCB);
803 if (devq == NULL)
804 return (ENOMEM);
805
806 /*
807 * ask the adapter what subunits are present
808 */
809 tagged_openings = min(slp->sl_openings, SCSI_LOW_MAXNEXUS);
810 slp->sl_sim = cam_sim_alloc(scsi_low_scsi_action_cam,
811 scsi_low_poll_cam,
812 device_get_name(slp->sl_dev), slp,
813 device_get_unit(slp->sl_dev), &slp->sl_lock,
814 slp->sl_openings, tagged_openings, devq);
815
816 if (slp->sl_sim == NULL) {
817 cam_simq_free(devq);
818 return ENODEV;
819 }
820
821 SCSI_LOW_LOCK(slp);
822 if (xpt_bus_register(slp->sl_sim, slp->sl_dev, 0) != CAM_SUCCESS) {
823 cam_sim_free(slp->sl_sim, TRUE);
824 SCSI_LOW_UNLOCK(slp);
825 return ENODEV;
826 }
827
828 if (xpt_create_path(&slp->sl_path, /*periph*/NULL,
829 cam_sim_path(slp->sl_sim), CAM_TARGET_WILDCARD,
830 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
831 xpt_bus_deregister(cam_sim_path(slp->sl_sim));
832 cam_sim_free(slp->sl_sim, /*free_simq*/TRUE);
833 SCSI_LOW_UNLOCK(slp);
834 return ENODEV;
835 }
836
837 slp->sl_show_result = SHOW_CALCF_RES; /* OK ? */
838 SCSI_LOW_UNLOCK(slp);
839 return 0;
840 }
841
842 static int
scsi_low_detach_cam(slp)843 scsi_low_detach_cam(slp)
844 struct scsi_low_softc *slp;
845 {
846
847 xpt_async(AC_LOST_DEVICE, slp->sl_path, NULL);
848 xpt_free_path(slp->sl_path);
849 xpt_bus_deregister(cam_sim_path(slp->sl_sim));
850 cam_sim_free(slp->sl_sim, /* free_devq */ TRUE);
851 return 0;
852 }
853
854 static int
scsi_low_ccb_setup_cam(slp,cb)855 scsi_low_ccb_setup_cam(slp, cb)
856 struct scsi_low_softc *slp;
857 struct slccb *cb;
858 {
859 union ccb *ccb = (union ccb *) cb->osdep;
860
861 if ((cb->ccb_flags & CCB_SCSIIO) != 0)
862 {
863 cb->ccb_scp.scp_cmd = ccb->csio.cdb_io.cdb_bytes;
864 cb->ccb_scp.scp_cmdlen = (int) ccb->csio.cdb_len;
865 cb->ccb_scp.scp_data = ccb->csio.data_ptr;
866 cb->ccb_scp.scp_datalen = (int) ccb->csio.dxfer_len;
867 if((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
868 cb->ccb_scp.scp_direction = SCSI_LOW_WRITE;
869 else /* if((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) */
870 cb->ccb_scp.scp_direction = SCSI_LOW_READ;
871 cb->ccb_tcmax = ccb->ccb_h.timeout / 1000;
872 }
873 else
874 {
875 scsi_low_unit_ready_cmd(cb);
876 }
877 return SCSI_LOW_START_QTAG;
878 }
879
880 static int
scsi_low_done_cam(slp,cb)881 scsi_low_done_cam(slp, cb)
882 struct scsi_low_softc *slp;
883 struct slccb *cb;
884 {
885 union ccb *ccb;
886
887 ccb = (union ccb *) cb->osdep;
888 if (cb->ccb_error == 0)
889 {
890 ccb->ccb_h.status = CAM_REQ_CMP;
891 ccb->csio.resid = 0;
892 }
893 else
894 {
895 if (cb->ccb_rcnt >= slp->sl_max_retry)
896 cb->ccb_error |= ABORTIO;
897
898 if ((cb->ccb_flags & CCB_NORETRY) == 0 &&
899 (cb->ccb_error & ABORTIO) == 0)
900 return EJUSTRETURN;
901
902 if ((cb->ccb_error & SENSEIO) != 0)
903 {
904 memcpy(&ccb->csio.sense_data,
905 &cb->ccb_sense,
906 sizeof(ccb->csio.sense_data));
907 }
908
909 ccb->ccb_h.status = scsi_low_translate_error_code(cb,
910 &scsi_low_error_code_cam[0]);
911
912 #ifdef SCSI_LOW_DIAGNOSTIC
913 if ((cb->ccb_flags & CCB_SILENT) == 0 &&
914 cb->ccb_scp.scp_cmdlen > 0 &&
915 (scsi_low_cmd_flags[cb->ccb_scp.scp_cmd[0]] &
916 SCSI_LOW_CMD_ABORT_WARNING) != 0)
917 {
918 device_printf(slp->sl_dev,
919 "WARNING: scsi_low IO abort\n");
920 scsi_low_print(slp, NULL);
921 }
922 #endif /* SCSI_LOW_DIAGNOSTIC */
923 }
924
925 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == 0)
926 ccb->ccb_h.status |= CAM_REQ_CMP_ERR;
927
928 if (cb->ccb_scp.scp_status == ST_UNKNOWN)
929 ccb->csio.scsi_status = 0; /* XXX */
930 else
931 ccb->csio.scsi_status = cb->ccb_scp.scp_status;
932
933 if ((cb->ccb_flags & CCB_NOSDONE) == 0)
934 xpt_done(ccb);
935 return 0;
936 }
937
938 /**************************************************************
939 * scsi low deactivate and activate
940 **************************************************************/
941 int
scsi_low_is_busy(slp)942 scsi_low_is_busy(slp)
943 struct scsi_low_softc *slp;
944 {
945
946 if (slp->sl_nio > 0)
947 return EBUSY;
948 return 0;
949 }
950
951 int
scsi_low_deactivate(slp)952 scsi_low_deactivate(slp)
953 struct scsi_low_softc *slp;
954 {
955
956 slp->sl_flags |= HW_INACTIVE;
957 callout_stop(&slp->sl_timeout_timer);
958 callout_stop(&slp->sl_engage_timer);
959 return 0;
960 }
961
962 int
scsi_low_activate(slp)963 scsi_low_activate(slp)
964 struct scsi_low_softc *slp;
965 {
966 int error;
967
968 slp->sl_flags &= ~HW_INACTIVE;
969 if ((error = scsi_low_restart(slp, SCSI_LOW_RESTART_HARD, NULL)) != 0)
970 {
971 slp->sl_flags |= HW_INACTIVE;
972 return error;
973 }
974
975 slp->sl_timeout_count = 0;
976 callout_reset(&slp->sl_timeout_timer, hz / SCSI_LOW_TIMEOUT_HZ,
977 scsi_low_timeout, slp);
978 return 0;
979 }
980
981 /**************************************************************
982 * scsi low log
983 **************************************************************/
984 #ifdef SCSI_LOW_DIAGNOSTIC
985 static void scsi_low_msg_log_init(struct scsi_low_msg_log *);
986 static void scsi_low_msg_log_write(struct scsi_low_msg_log *, u_int8_t *, int);
987 static void scsi_low_msg_log_show(struct scsi_low_msg_log *, char *, int);
988
989 static void
scsi_low_msg_log_init(slmlp)990 scsi_low_msg_log_init(slmlp)
991 struct scsi_low_msg_log *slmlp;
992 {
993
994 slmlp->slml_ptr = 0;
995 }
996
997 static void
scsi_low_msg_log_write(slmlp,datap,len)998 scsi_low_msg_log_write(slmlp, datap, len)
999 struct scsi_low_msg_log *slmlp;
1000 u_int8_t *datap;
1001 int len;
1002 {
1003 int ptr, ind;
1004
1005 if (slmlp->slml_ptr >= SCSI_LOW_MSG_LOG_DATALEN)
1006 return;
1007
1008 ptr = slmlp->slml_ptr ++;
1009 for (ind = 0; ind < sizeof(slmlp->slml_msg[0]) && ind < len; ind ++)
1010 slmlp->slml_msg[ptr].msg[ind] = datap[ind];
1011 for ( ; ind < sizeof(slmlp->slml_msg[0]); ind ++)
1012 slmlp->slml_msg[ptr].msg[ind] = 0;
1013 }
1014
1015 static void
scsi_low_msg_log_show(slmlp,s,len)1016 scsi_low_msg_log_show(slmlp, s, len)
1017 struct scsi_low_msg_log *slmlp;
1018 char *s;
1019 int len;
1020 {
1021 int ptr, ind;
1022
1023 printf("%s: (%d) ", s, slmlp->slml_ptr);
1024 for (ptr = 0; ptr < slmlp->slml_ptr; ptr ++)
1025 {
1026 for (ind = 0; ind < len && ind < sizeof(slmlp->slml_msg[0]);
1027 ind ++)
1028 {
1029 printf("[%x]", (u_int) slmlp->slml_msg[ptr].msg[ind]);
1030 }
1031 printf(">");
1032 }
1033 printf("\n");
1034 }
1035 #endif /* SCSI_LOW_DIAGNOSTIC */
1036
1037 /**************************************************************
1038 * power control
1039 **************************************************************/
1040 static void
scsi_low_engage(arg)1041 scsi_low_engage(arg)
1042 void *arg;
1043 {
1044 struct scsi_low_softc *slp = arg;
1045
1046 SCSI_LOW_ASSERT_LOCKED(slp);
1047 switch (slp->sl_rstep)
1048 {
1049 case 0:
1050 slp->sl_rstep ++;
1051 (*slp->sl_funcs->scsi_low_power) (slp, SCSI_LOW_ENGAGE);
1052 callout_reset(&slp->sl_engage_timer, hz / 1000,
1053 scsi_low_engage, slp);
1054 break;
1055
1056 case 1:
1057 slp->sl_rstep ++;
1058 slp->sl_flags &= ~HW_RESUME;
1059 scsi_low_start(slp);
1060 break;
1061
1062 case 2:
1063 break;
1064 }
1065 }
1066
1067 static int
scsi_low_init(slp,flags)1068 scsi_low_init(slp, flags)
1069 struct scsi_low_softc *slp;
1070 u_int flags;
1071 {
1072 int rv = 0;
1073
1074 slp->sl_flags |= HW_INITIALIZING;
1075
1076 /* clear power control timeout */
1077 if ((slp->sl_flags & HW_POWERCTRL) != 0)
1078 {
1079 callout_stop(&slp->sl_engage_timer);
1080 slp->sl_flags &= ~(HW_POWDOWN | HW_RESUME);
1081 slp->sl_active = 1;
1082 slp->sl_powc = SCSI_LOW_POWDOWN_TC;
1083 }
1084
1085 /* reset current nexus */
1086 scsi_low_reset_nexus(slp, flags);
1087 if ((slp->sl_flags & HW_INACTIVE) != 0)
1088 {
1089 rv = EBUSY;
1090 goto out;
1091 }
1092
1093 if (flags != SCSI_LOW_RESTART_SOFT)
1094 {
1095 rv = ((*slp->sl_funcs->scsi_low_init) (slp, flags));
1096 }
1097
1098 out:
1099 slp->sl_flags &= ~HW_INITIALIZING;
1100 return rv;
1101 }
1102
1103 /**************************************************************
1104 * allocate lun_info
1105 **************************************************************/
1106 static struct lun_info *
scsi_low_alloc_li(ti,lun,alloc)1107 scsi_low_alloc_li(ti, lun, alloc)
1108 struct targ_info *ti;
1109 int lun;
1110 int alloc;
1111 {
1112 struct scsi_low_softc *slp = ti->ti_sc;
1113 struct lun_info *li;
1114
1115 li = LIST_FIRST(&ti->ti_litab);
1116 if (li != NULL)
1117 {
1118 if (li->li_lun == lun)
1119 return li;
1120
1121 while ((li = LIST_NEXT(li, lun_chain)) != NULL)
1122 {
1123 if (li->li_lun == lun)
1124 {
1125 LIST_REMOVE(li, lun_chain);
1126 LIST_INSERT_HEAD(&ti->ti_litab, li, lun_chain);
1127 return li;
1128 }
1129 }
1130 }
1131
1132 if (alloc == 0)
1133 return li;
1134
1135 li = SCSI_LOW_MALLOC(ti->ti_lunsize);
1136 if (li == NULL)
1137 panic("no lun info mem");
1138
1139 bzero(li, ti->ti_lunsize);
1140 li->li_lun = lun;
1141 li->li_ti = ti;
1142
1143 li->li_cfgflags = SCSI_LOW_SYNC | SCSI_LOW_LINK | SCSI_LOW_DISC |
1144 SCSI_LOW_QTAG;
1145 li->li_quirks = li->li_diskflags = SCSI_LOW_DISK_LFLAGS;
1146 li->li_flags_valid = SCSI_LOW_LUN_FLAGS_USER_VALID;
1147 #ifdef SCSI_LOW_FLAGS_QUIRKS_OK
1148 li->li_flags_valid |= SCSI_LOW_LUN_FLAGS_QUIRKS_VALID;
1149 #endif /* SCSI_LOW_FLAGS_QUIRKS_OK */
1150
1151 li->li_qtagbits = (u_int) -1;
1152
1153 TAILQ_INIT(&li->li_discq);
1154 LIST_INSERT_HEAD(&ti->ti_litab, li, lun_chain);
1155
1156 /* host specific structure initialization per lun */
1157 if (slp->sl_funcs->scsi_low_lun_init != NULL)
1158 (*slp->sl_funcs->scsi_low_lun_init)
1159 (slp, ti, li, SCSI_LOW_INFO_ALLOC);
1160 scsi_low_calcf_lun(li);
1161 return li;
1162 }
1163
1164 /**************************************************************
1165 * allocate targ_info
1166 **************************************************************/
1167 static struct targ_info *
scsi_low_alloc_ti(slp,targ)1168 scsi_low_alloc_ti(slp, targ)
1169 struct scsi_low_softc *slp;
1170 int targ;
1171 {
1172 struct targ_info *ti;
1173
1174 if (TAILQ_FIRST(&slp->sl_titab) == NULL)
1175 TAILQ_INIT(&slp->sl_titab);
1176
1177 ti = SCSI_LOW_MALLOC(slp->sl_targsize);
1178 if (ti == NULL)
1179 panic("%s short of memory", device_get_nameunit(slp->sl_dev));
1180
1181 bzero(ti, slp->sl_targsize);
1182 ti->ti_id = targ;
1183 ti->ti_sc = slp;
1184
1185 slp->sl_ti[targ] = ti;
1186 TAILQ_INSERT_TAIL(&slp->sl_titab, ti, ti_chain);
1187 LIST_INIT(&ti->ti_litab);
1188
1189 ti->ti_quirks = ti->ti_diskflags = SCSI_LOW_DISK_TFLAGS;
1190 ti->ti_owidth = SCSI_LOW_BUS_WIDTH_8;
1191 ti->ti_flags_valid = SCSI_LOW_TARG_FLAGS_USER_VALID;
1192 #ifdef SCSI_LOW_FLAGS_QUIRKS_OK
1193 ti->ti_flags_valid |= SCSI_LOW_TARG_FLAGS_QUIRKS_VALID;
1194 #endif /* SCSI_LOW_FLAGS_QUIRKS_OK */
1195
1196 if (slp->sl_funcs->scsi_low_targ_init != NULL)
1197 {
1198 (*slp->sl_funcs->scsi_low_targ_init)
1199 (slp, ti, SCSI_LOW_INFO_ALLOC);
1200 }
1201 scsi_low_calcf_target(ti);
1202 return ti;
1203 }
1204
1205 static void
scsi_low_free_ti(slp)1206 scsi_low_free_ti(slp)
1207 struct scsi_low_softc *slp;
1208 {
1209 struct targ_info *ti, *tib;
1210 struct lun_info *li, *nli;
1211
1212 for (ti = TAILQ_FIRST(&slp->sl_titab); ti; ti = tib)
1213 {
1214 for (li = LIST_FIRST(&ti->ti_litab); li != NULL; li = nli)
1215 {
1216 if (slp->sl_funcs->scsi_low_lun_init != NULL)
1217 {
1218 (*slp->sl_funcs->scsi_low_lun_init)
1219 (slp, ti, li, SCSI_LOW_INFO_DEALLOC);
1220 }
1221 nli = LIST_NEXT(li, lun_chain);
1222 SCSI_LOW_FREE(li);
1223 }
1224
1225 if (slp->sl_funcs->scsi_low_targ_init != NULL)
1226 {
1227 (*slp->sl_funcs->scsi_low_targ_init)
1228 (slp, ti, SCSI_LOW_INFO_DEALLOC);
1229 }
1230 tib = TAILQ_NEXT(ti, ti_chain);
1231 SCSI_LOW_FREE(ti);
1232 }
1233 }
1234
1235 /**************************************************************
1236 * timeout
1237 **************************************************************/
1238 void
scsi_low_bus_idle(slp)1239 scsi_low_bus_idle(slp)
1240 struct scsi_low_softc *slp;
1241 {
1242
1243 slp->sl_retry_sel = 0;
1244 if (slp->sl_Tnexus == NULL)
1245 scsi_low_start(slp);
1246 }
1247
1248 static void
scsi_low_timeout(arg)1249 scsi_low_timeout(arg)
1250 void *arg;
1251 {
1252 struct scsi_low_softc *slp = arg;
1253
1254 SCSI_LOW_ASSERT_LOCKED(slp);
1255 (void) scsi_low_timeout_check(slp);
1256 callout_schedule(&slp->sl_timeout_timer, hz / SCSI_LOW_TIMEOUT_HZ);
1257 }
1258
1259 static int
scsi_low_timeout_check(slp)1260 scsi_low_timeout_check(slp)
1261 struct scsi_low_softc *slp;
1262 {
1263 struct targ_info *ti;
1264 struct lun_info *li;
1265 struct slccb *cb = NULL; /* XXX */
1266
1267 /* selection restart */
1268 if (slp->sl_retry_sel != 0)
1269 {
1270 slp->sl_retry_sel = 0;
1271 if (slp->sl_Tnexus != NULL)
1272 goto step1;
1273
1274 cb = TAILQ_FIRST(&slp->sl_start);
1275 if (cb == NULL)
1276 goto step1;
1277
1278 if (cb->ccb_selrcnt >= SCSI_LOW_MAX_SELECTION_RETRY)
1279 {
1280 cb->ccb_flags |= CCB_NORETRY;
1281 cb->ccb_error |= SELTIMEOUTIO;
1282 if (scsi_low_revoke_ccb(slp, cb, 1) != NULL)
1283 panic("%s: ccb not finished",
1284 device_get_nameunit(slp->sl_dev));
1285 }
1286
1287 if (slp->sl_Tnexus == NULL)
1288 scsi_low_start(slp);
1289 }
1290
1291 /* call hardware timeout */
1292 step1:
1293 if (slp->sl_funcs->scsi_low_timeout != NULL)
1294 {
1295 (*slp->sl_funcs->scsi_low_timeout) (slp);
1296 }
1297
1298 if (slp->sl_timeout_count ++ <
1299 SCSI_LOW_TIMEOUT_CHECK_INTERVAL * SCSI_LOW_TIMEOUT_HZ)
1300 return 0;
1301
1302 slp->sl_timeout_count = 0;
1303 if (slp->sl_nio > 0)
1304 {
1305 if ((cb = slp->sl_Qnexus) != NULL)
1306 {
1307 cb->ccb_tc -= SCSI_LOW_TIMEOUT_CHECK_INTERVAL;
1308 if (cb->ccb_tc < 0)
1309 goto bus_reset;
1310 }
1311 else if (slp->sl_disc == 0)
1312 {
1313 if ((cb = TAILQ_FIRST(&slp->sl_start)) == NULL)
1314 return 0;
1315
1316 cb->ccb_tc -= SCSI_LOW_TIMEOUT_CHECK_INTERVAL;
1317 if (cb->ccb_tc < 0)
1318 goto bus_reset;
1319 }
1320 else for (ti = TAILQ_FIRST(&slp->sl_titab); ti != NULL;
1321 ti = TAILQ_NEXT(ti, ti_chain))
1322 {
1323 if (ti->ti_disc == 0)
1324 continue;
1325
1326 for (li = LIST_FIRST(&ti->ti_litab); li != NULL;
1327 li = LIST_NEXT(li, lun_chain))
1328 {
1329 for (cb = TAILQ_FIRST(&li->li_discq);
1330 cb != NULL;
1331 cb = TAILQ_NEXT(cb, ccb_chain))
1332 {
1333 cb->ccb_tc -=
1334 SCSI_LOW_TIMEOUT_CHECK_INTERVAL;
1335 if (cb->ccb_tc < 0)
1336 goto bus_reset;
1337 }
1338 }
1339 }
1340
1341 }
1342 else if ((slp->sl_flags & HW_POWERCTRL) != 0)
1343 {
1344 if ((slp->sl_flags & (HW_POWDOWN | HW_RESUME)) != 0)
1345 return 0;
1346
1347 if (slp->sl_active != 0)
1348 {
1349 slp->sl_powc = SCSI_LOW_POWDOWN_TC;
1350 slp->sl_active = 0;
1351 return 0;
1352 }
1353
1354 slp->sl_powc --;
1355 if (slp->sl_powc < 0)
1356 {
1357 slp->sl_powc = SCSI_LOW_POWDOWN_TC;
1358 slp->sl_flags |= HW_POWDOWN;
1359 (*slp->sl_funcs->scsi_low_power)
1360 (slp, SCSI_LOW_POWDOWN);
1361 }
1362 }
1363 return 0;
1364
1365 bus_reset:
1366 cb->ccb_error |= TIMEOUTIO;
1367 device_printf(slp->sl_dev, "slccb (0x%lx) timeout!\n", (u_long) cb);
1368 scsi_low_info(slp, NULL, "scsi bus hangup. try to recover.");
1369 scsi_low_init(slp, SCSI_LOW_RESTART_HARD);
1370 scsi_low_start(slp);
1371 return ERESTART;
1372 }
1373
1374
1375 static int
scsi_low_abort_ccb(slp,cb)1376 scsi_low_abort_ccb(slp, cb)
1377 struct scsi_low_softc *slp;
1378 struct slccb *cb;
1379 {
1380 struct targ_info *ti;
1381 struct lun_info *li;
1382 u_int msg;
1383
1384 if (cb == NULL)
1385 return EINVAL;
1386 if ((cb->ccb_omsgoutflag &
1387 (SCSI_LOW_MSG_ABORT | SCSI_LOW_MSG_ABORT_QTAG)) != 0)
1388 return EBUSY;
1389
1390 ti = cb->ti;
1391 li = cb->li;
1392 if (cb->ccb_tag == SCSI_LOW_UNKTAG)
1393 msg = SCSI_LOW_MSG_ABORT;
1394 else
1395 msg = SCSI_LOW_MSG_ABORT_QTAG;
1396
1397 cb->ccb_error |= ABORTIO;
1398 cb->ccb_flags |= CCB_NORETRY;
1399 scsi_low_ccb_message_assert(cb, msg);
1400
1401 if (cb == slp->sl_Qnexus)
1402 {
1403 scsi_low_assert_msg(slp, ti, msg, 1);
1404 }
1405 else if ((cb->ccb_flags & CCB_DISCQ) != 0)
1406 {
1407 if (scsi_low_revoke_ccb(slp, cb, 0) == NULL)
1408 panic("%s: revoked ccb done",
1409 device_get_nameunit(slp->sl_dev));
1410
1411 cb->ccb_flags |= CCB_STARTQ;
1412 TAILQ_INSERT_HEAD(&slp->sl_start, cb, ccb_chain);
1413
1414 if (slp->sl_Tnexus == NULL)
1415 scsi_low_start(slp);
1416 }
1417 else
1418 {
1419 if (scsi_low_revoke_ccb(slp, cb, 1) != NULL)
1420 panic("%s: revoked ccb retried",
1421 device_get_nameunit(slp->sl_dev));
1422 }
1423 return 0;
1424 }
1425
1426 /**************************************************************
1427 * Generic SCSI INTERFACE
1428 **************************************************************/
1429 int
scsi_low_attach(slp,openings,ntargs,nluns,targsize,lunsize)1430 scsi_low_attach(slp, openings, ntargs, nluns, targsize, lunsize)
1431 struct scsi_low_softc *slp;
1432 int openings, ntargs, nluns, targsize, lunsize;
1433 {
1434 struct targ_info *ti;
1435 struct lun_info *li;
1436 int i, nccb, rv;
1437
1438 if (ntargs > SCSI_LOW_NTARGETS)
1439 {
1440 printf("scsi_low: %d targets are too large\n", ntargs);
1441 printf("change kernel options SCSI_LOW_NTARGETS");
1442 return EINVAL;
1443 }
1444
1445 if (openings <= 0)
1446 slp->sl_openings = (SCSI_LOW_NCCB / ntargs);
1447 else
1448 slp->sl_openings = openings;
1449 slp->sl_ntargs = ntargs;
1450 slp->sl_nluns = nluns;
1451 slp->sl_max_retry = SCSI_LOW_MAX_RETRY;
1452
1453 if (lunsize < sizeof(struct lun_info))
1454 lunsize = sizeof(struct lun_info);
1455
1456 if (targsize < sizeof(struct targ_info))
1457 targsize = sizeof(struct targ_info);
1458
1459 slp->sl_targsize = targsize;
1460 for (i = 0; i < ntargs; i ++)
1461 {
1462 ti = scsi_low_alloc_ti(slp, i);
1463 ti->ti_lunsize = lunsize;
1464 li = scsi_low_alloc_li(ti, 0, 1);
1465 }
1466
1467 /* initialize queue */
1468 nccb = openings * ntargs;
1469 if (nccb >= SCSI_LOW_NCCB || nccb <= 0)
1470 nccb = SCSI_LOW_NCCB;
1471 scsi_low_init_ccbque(nccb);
1472 TAILQ_INIT(&slp->sl_start);
1473
1474 /* call os depend attach */
1475 rv = scsi_low_attach_cam(slp);
1476 if (rv != 0)
1477 {
1478 device_printf(slp->sl_dev,
1479 "scsi_low_attach: osdep attach failed\n");
1480 return (rv);
1481 }
1482
1483 /* check hardware */
1484 DELAY(1000); /* wait for 1ms */
1485 SCSI_LOW_LOCK(slp);
1486 if (scsi_low_init(slp, SCSI_LOW_RESTART_HARD) != 0)
1487 {
1488 device_printf(slp->sl_dev,
1489 "scsi_low_attach: initialization failed\n");
1490 SCSI_LOW_UNLOCK(slp);
1491 return EINVAL;
1492 }
1493
1494 /* start watch dog */
1495 slp->sl_timeout_count = 0;
1496 callout_reset(&slp->sl_timeout_timer, hz / SCSI_LOW_TIMEOUT_HZ,
1497 scsi_low_timeout, slp);
1498 mtx_lock(&sl_tab_lock);
1499 LIST_INSERT_HEAD(&sl_tab, slp, sl_chain);
1500 mtx_unlock(&sl_tab_lock);
1501
1502 /* fake call */
1503 scsi_low_abort_ccb(slp, scsi_low_find_ccb(slp, 0, 0, NULL));
1504
1505 #ifdef SCSI_LOW_START_UP_CHECK
1506 /* probing devices */
1507 scsi_low_start_up(slp);
1508 #endif /* SCSI_LOW_START_UP_CHECK */
1509 SCSI_LOW_UNLOCK(slp);
1510
1511 return 0;
1512 }
1513
1514 int
scsi_low_detach(slp)1515 scsi_low_detach(slp)
1516 struct scsi_low_softc *slp;
1517 {
1518 int rv;
1519
1520 SCSI_LOW_LOCK(slp);
1521 if (scsi_low_is_busy(slp) != 0)
1522 {
1523 SCSI_LOW_UNLOCK(slp);
1524 return EBUSY;
1525 }
1526
1527 scsi_low_deactivate(slp);
1528
1529 rv = scsi_low_detach_cam(slp);
1530 if (rv != 0)
1531 {
1532 SCSI_LOW_UNLOCK(slp);
1533 return EBUSY;
1534 }
1535
1536 scsi_low_free_ti(slp);
1537 SCSI_LOW_UNLOCK(slp);
1538 callout_drain(&slp->sl_timeout_timer);
1539 callout_drain(&slp->sl_engage_timer);
1540 mtx_lock(&sl_tab_lock);
1541 LIST_REMOVE(slp, sl_chain);
1542 mtx_unlock(&sl_tab_lock);
1543 return 0;
1544 }
1545
1546 /**************************************************************
1547 * Generic enqueue
1548 **************************************************************/
1549 static int
scsi_low_enqueue(slp,ti,li,cb,flags,msg)1550 scsi_low_enqueue(slp, ti, li, cb, flags, msg)
1551 struct scsi_low_softc *slp;
1552 struct targ_info *ti;
1553 struct lun_info *li;
1554 struct slccb *cb;
1555 u_int flags, msg;
1556 {
1557
1558 cb->ti = ti;
1559 cb->li = li;
1560
1561 scsi_low_ccb_message_assert(cb, msg);
1562
1563 cb->ccb_otag = cb->ccb_tag = SCSI_LOW_UNKTAG;
1564 scsi_low_alloc_qtag(cb);
1565
1566 cb->ccb_flags = flags | CCB_STARTQ;
1567 cb->ccb_tc = cb->ccb_tcmax = SCSI_LOW_MIN_TOUT;
1568 cb->ccb_error |= PENDINGIO;
1569
1570 if ((flags & CCB_URGENT) != 0)
1571 {
1572 TAILQ_INSERT_HEAD(&slp->sl_start, cb, ccb_chain);
1573 }
1574 else
1575 {
1576 TAILQ_INSERT_TAIL(&slp->sl_start, cb, ccb_chain);
1577 }
1578
1579 slp->sl_nio ++;
1580
1581 if (slp->sl_Tnexus == NULL)
1582 scsi_low_start(slp);
1583 return 0;
1584 }
1585
1586 static int
scsi_low_message_enqueue(slp,ti,li,flags)1587 scsi_low_message_enqueue(slp, ti, li, flags)
1588 struct scsi_low_softc *slp;
1589 struct targ_info *ti;
1590 struct lun_info *li;
1591 u_int flags;
1592 {
1593 struct slccb *cb;
1594 u_int tmsgflags;
1595
1596 tmsgflags = ti->ti_setup_msg;
1597 ti->ti_setup_msg = 0;
1598
1599 flags |= CCB_NORETRY;
1600 if ((cb = SCSI_LOW_ALLOC_CCB(1)) == NULL)
1601 return ENOMEM;
1602
1603 cb->osdep = NULL;
1604 cb->bp = NULL;
1605 scsi_low_enqueue(slp, ti, li, cb, flags, tmsgflags);
1606 return 0;
1607 }
1608
1609 /**************************************************************
1610 * Generic Start & Done
1611 **************************************************************/
1612 #define SLSC_MODE_SENSE_SHORT 0x1a
1613 static u_int8_t ss_cmd[6] = {START_STOP, 0, 0, 0, SSS_START, 0};
1614 static u_int8_t sms_cmd[6] = {SLSC_MODE_SENSE_SHORT, 0x08, 0x0a, 0,
1615 sizeof(struct scsi_low_mode_sense_data), 0};
1616 static u_int8_t inq_cmd[6] = {INQUIRY, 0, 0, 0,
1617 sizeof(struct scsi_low_inq_data), 0};
1618 static u_int8_t unit_ready_cmd[6];
1619 static int scsi_low_setup_start(struct scsi_low_softc *, struct targ_info *, struct lun_info *, struct slccb *);
1620 static int scsi_low_sense_abort_start(struct scsi_low_softc *, struct targ_info *, struct lun_info *, struct slccb *);
1621 static int scsi_low_resume(struct scsi_low_softc *);
1622
1623 static void
scsi_low_unit_ready_cmd(cb)1624 scsi_low_unit_ready_cmd(cb)
1625 struct slccb *cb;
1626 {
1627
1628 cb->ccb_scp.scp_cmd = unit_ready_cmd;
1629 cb->ccb_scp.scp_cmdlen = sizeof(unit_ready_cmd);
1630 cb->ccb_scp.scp_datalen = 0;
1631 cb->ccb_scp.scp_direction = SCSI_LOW_READ;
1632 cb->ccb_tcmax = 15;
1633 }
1634
1635 static int
scsi_low_sense_abort_start(slp,ti,li,cb)1636 scsi_low_sense_abort_start(slp, ti, li, cb)
1637 struct scsi_low_softc *slp;
1638 struct targ_info *ti;
1639 struct lun_info *li;
1640 struct slccb *cb;
1641 {
1642
1643 cb->ccb_scp.scp_cmdlen = 6;
1644 bzero(cb->ccb_scsi_cmd, cb->ccb_scp.scp_cmdlen);
1645 cb->ccb_scsi_cmd[0] = REQUEST_SENSE;
1646 cb->ccb_scsi_cmd[4] = sizeof(cb->ccb_sense);
1647 cb->ccb_scp.scp_cmd = cb->ccb_scsi_cmd;
1648 cb->ccb_scp.scp_data = (u_int8_t *) &cb->ccb_sense;
1649 cb->ccb_scp.scp_datalen = sizeof(cb->ccb_sense);
1650 cb->ccb_scp.scp_direction = SCSI_LOW_READ;
1651 cb->ccb_tcmax = 15;
1652 scsi_low_ccb_message_clear(cb);
1653 if ((cb->ccb_flags & CCB_CLEARQ) != 0)
1654 {
1655 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
1656 }
1657 else
1658 {
1659 bzero(&cb->ccb_sense, sizeof(cb->ccb_sense));
1660 #ifdef SCSI_LOW_NEGOTIATE_BEFORE_SENSE
1661 scsi_low_assert_msg(slp, ti, ti->ti_setup_msg_done, 0);
1662 #endif /* SCSI_LOW_NEGOTIATE_BEFORE_SENSE */
1663 }
1664
1665 return SCSI_LOW_START_NO_QTAG;
1666 }
1667
1668 static int
scsi_low_setup_start(slp,ti,li,cb)1669 scsi_low_setup_start(slp, ti, li, cb)
1670 struct scsi_low_softc *slp;
1671 struct targ_info *ti;
1672 struct lun_info *li;
1673 struct slccb *cb;
1674 {
1675
1676 switch(li->li_state)
1677 {
1678 case SCSI_LOW_LUN_SLEEP:
1679 scsi_low_unit_ready_cmd(cb);
1680 break;
1681
1682 case SCSI_LOW_LUN_START:
1683 cb->ccb_scp.scp_cmd = ss_cmd;
1684 cb->ccb_scp.scp_cmdlen = sizeof(ss_cmd);
1685 cb->ccb_scp.scp_datalen = 0;
1686 cb->ccb_scp.scp_direction = SCSI_LOW_READ;
1687 cb->ccb_tcmax = 30;
1688 break;
1689
1690 case SCSI_LOW_LUN_INQ:
1691 cb->ccb_scp.scp_cmd = inq_cmd;
1692 cb->ccb_scp.scp_cmdlen = sizeof(inq_cmd);
1693 cb->ccb_scp.scp_data = (u_int8_t *)&li->li_inq;
1694 cb->ccb_scp.scp_datalen = sizeof(li->li_inq);
1695 cb->ccb_scp.scp_direction = SCSI_LOW_READ;
1696 cb->ccb_tcmax = 15;
1697 break;
1698
1699 case SCSI_LOW_LUN_MODEQ:
1700 cb->ccb_scp.scp_cmd = sms_cmd;
1701 cb->ccb_scp.scp_cmdlen = sizeof(sms_cmd);
1702 cb->ccb_scp.scp_data = (u_int8_t *)&li->li_sms;
1703 cb->ccb_scp.scp_datalen = sizeof(li->li_sms);
1704 cb->ccb_scp.scp_direction = SCSI_LOW_READ;
1705 cb->ccb_tcmax = 15;
1706 return SCSI_LOW_START_QTAG;
1707
1708 default:
1709 panic("%s: no setup phase", device_get_nameunit(slp->sl_dev));
1710 }
1711
1712 return SCSI_LOW_START_NO_QTAG;
1713 }
1714
1715 static int
scsi_low_resume(slp)1716 scsi_low_resume(slp)
1717 struct scsi_low_softc *slp;
1718 {
1719
1720 if (slp->sl_flags & HW_RESUME)
1721 return EJUSTRETURN;
1722 slp->sl_flags &= ~HW_POWDOWN;
1723 if (slp->sl_funcs->scsi_low_power != NULL)
1724 {
1725 slp->sl_flags |= HW_RESUME;
1726 slp->sl_rstep = 0;
1727 (*slp->sl_funcs->scsi_low_power) (slp, SCSI_LOW_ENGAGE);
1728 callout_reset(&slp->sl_engage_timer, hz / 1000,
1729 scsi_low_engage, slp);
1730 return EJUSTRETURN;
1731 }
1732 return 0;
1733 }
1734
1735 static void
scsi_low_start(slp)1736 scsi_low_start(slp)
1737 struct scsi_low_softc *slp;
1738 {
1739 struct targ_info *ti;
1740 struct lun_info *li;
1741 struct slccb *cb;
1742 int rv;
1743
1744 /* check hardware exists or under initializations ? */
1745 if ((slp->sl_flags & (HW_INACTIVE | HW_INITIALIZING)) != 0)
1746 return;
1747
1748 /* check hardware power up ? */
1749 if ((slp->sl_flags & HW_POWERCTRL) != 0)
1750 {
1751 slp->sl_active ++;
1752 if (slp->sl_flags & (HW_POWDOWN | HW_RESUME))
1753 {
1754 if (scsi_low_resume(slp) == EJUSTRETURN)
1755 return;
1756 }
1757 }
1758
1759 /* setup nexus */
1760 #ifdef SCSI_LOW_DIAGNOSTIC
1761 if (slp->sl_Tnexus || slp->sl_Lnexus || slp->sl_Qnexus)
1762 {
1763 scsi_low_info(slp, NULL, "NEXUS INCOSISTENT");
1764 panic("%s: inconsistent", device_get_nameunit(slp->sl_dev));
1765 }
1766 #endif /* SCSI_LOW_DIAGNOSTIC */
1767
1768 for (cb = TAILQ_FIRST(&slp->sl_start); cb != NULL;
1769 cb = TAILQ_NEXT(cb, ccb_chain))
1770 {
1771 li = cb->li;
1772
1773 if (li->li_disc == 0)
1774 {
1775 goto scsi_low_cmd_start;
1776 }
1777 else if (li->li_nqio > 0)
1778 {
1779 if (li->li_nqio < li->li_maxnqio ||
1780 (cb->ccb_flags & (CCB_SENSE | CCB_CLEARQ)) != 0)
1781 goto scsi_low_cmd_start;
1782 }
1783 }
1784 return;
1785
1786 scsi_low_cmd_start:
1787 cb->ccb_flags &= ~CCB_STARTQ;
1788 TAILQ_REMOVE(&slp->sl_start, cb, ccb_chain);
1789 ti = cb->ti;
1790
1791 /* clear all error flag bits (for restart) */
1792 cb->ccb_error = 0;
1793 cb->ccb_datalen = -1;
1794 cb->ccb_scp.scp_status = ST_UNKNOWN;
1795
1796 /* setup nexus pointer */
1797 slp->sl_Qnexus = cb;
1798 slp->sl_Lnexus = li;
1799 slp->sl_Tnexus = ti;
1800
1801 /* initialize msgsys */
1802 scsi_low_init_msgsys(slp, ti);
1803
1804 /* exec cmd */
1805 if ((cb->ccb_flags & (CCB_SENSE | CCB_CLEARQ)) != 0)
1806 {
1807 /* CA state or forced abort */
1808 rv = scsi_low_sense_abort_start(slp, ti, li, cb);
1809 }
1810 else if (li->li_state >= SCSI_LOW_LUN_OK)
1811 {
1812 cb->ccb_flags &= ~CCB_INTERNAL;
1813 rv = scsi_low_ccb_setup_cam(slp, cb);
1814 if (cb->ccb_msgoutflag != 0)
1815 {
1816 scsi_low_ccb_message_exec(slp, cb);
1817 }
1818 }
1819 else
1820 {
1821 cb->ccb_flags |= CCB_INTERNAL;
1822 rv = scsi_low_setup_start(slp, ti, li, cb);
1823 }
1824
1825 /* allocate qtag */
1826 #define SCSI_LOW_QTAG_OK (SCSI_LOW_QTAG | SCSI_LOW_DISC)
1827
1828 if (rv == SCSI_LOW_START_QTAG &&
1829 (li->li_flags & SCSI_LOW_QTAG_OK) == SCSI_LOW_QTAG_OK &&
1830 li->li_maxnqio > 0)
1831 {
1832 u_int qmsg;
1833
1834 scsi_low_activate_qtag(cb);
1835 if ((scsi_low_cmd_flags[cb->ccb_scp.scp_cmd[0]] &
1836 SCSI_LOW_CMD_ORDERED_QTAG) != 0)
1837 qmsg = SCSI_LOW_MSG_ORDERED_QTAG;
1838 else if ((cb->ccb_flags & CCB_URGENT) != 0)
1839 qmsg = SCSI_LOW_MSG_HEAD_QTAG;
1840 else
1841 qmsg = SCSI_LOW_MSG_SIMPLE_QTAG;
1842 scsi_low_assert_msg(slp, ti, qmsg, 0);
1843 }
1844
1845 /* timeout */
1846 if (cb->ccb_tcmax < SCSI_LOW_MIN_TOUT)
1847 cb->ccb_tcmax = SCSI_LOW_MIN_TOUT;
1848 cb->ccb_tc = cb->ccb_tcmax;
1849
1850 /* setup saved scsi data pointer */
1851 cb->ccb_sscp = cb->ccb_scp;
1852
1853 /* setup current scsi pointer */
1854 slp->sl_scp = cb->ccb_sscp;
1855 slp->sl_error = cb->ccb_error;
1856
1857 /* assert always an identify msg */
1858 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_IDENTIFY, 0);
1859
1860 /* debug section */
1861 #ifdef SCSI_LOW_DIAGNOSTIC
1862 scsi_low_msg_log_init(&ti->ti_log_msgin);
1863 scsi_low_msg_log_init(&ti->ti_log_msgout);
1864 #endif /* SCSI_LOW_DIAGNOSTIC */
1865
1866 /* selection start */
1867 slp->sl_selid = cb;
1868 rv = ((*slp->sl_funcs->scsi_low_start_bus) (slp, cb));
1869 if (rv == SCSI_LOW_START_OK)
1870 {
1871 #ifdef SCSI_LOW_STATICS
1872 scsi_low_statics.nexus_win ++;
1873 #endif /* SCSI_LOW_STATICS */
1874 return;
1875 }
1876
1877 scsi_low_arbit_fail(slp, cb);
1878 #ifdef SCSI_LOW_STATICS
1879 scsi_low_statics.nexus_fail ++;
1880 #endif /* SCSI_LOW_STATICS */
1881 }
1882
1883 void
scsi_low_arbit_fail(slp,cb)1884 scsi_low_arbit_fail(slp, cb)
1885 struct scsi_low_softc *slp;
1886 struct slccb *cb;
1887 {
1888 struct targ_info *ti = cb->ti;
1889
1890 scsi_low_deactivate_qtag(cb);
1891 scsi_low_ccb_message_retry(cb);
1892 cb->ccb_flags |= CCB_STARTQ;
1893 TAILQ_INSERT_HEAD(&slp->sl_start, cb, ccb_chain);
1894
1895 scsi_low_bus_release(slp, ti);
1896
1897 cb->ccb_selrcnt ++;
1898 if (slp->sl_disc == 0)
1899 {
1900 #ifdef SCSI_LOW_DIAGNOSTIC
1901 device_printf(slp->sl_dev, "try selection again\n");
1902 #endif /* SCSI_LOW_DIAGNOSTIC */
1903 slp->sl_retry_sel = 1;
1904 }
1905 }
1906
1907 static void
scsi_low_bus_release(slp,ti)1908 scsi_low_bus_release(slp, ti)
1909 struct scsi_low_softc *slp;
1910 struct targ_info *ti;
1911 {
1912
1913 if (ti->ti_disc > 0)
1914 {
1915 SCSI_LOW_SETUP_PHASE(ti, PH_DISC);
1916 }
1917 else
1918 {
1919 SCSI_LOW_SETUP_PHASE(ti, PH_NULL);
1920 }
1921
1922 /* clear all nexus pointer */
1923 slp->sl_Qnexus = NULL;
1924 slp->sl_Lnexus = NULL;
1925 slp->sl_Tnexus = NULL;
1926
1927 /* clear selection assert */
1928 slp->sl_selid = NULL;
1929
1930 /* clear nexus data */
1931 slp->sl_scp.scp_direction = SCSI_LOW_RWUNK;
1932
1933 /* clear phase change counter */
1934 slp->sl_ph_count = 0;
1935 }
1936
1937 static int
scsi_low_setup_done(slp,cb)1938 scsi_low_setup_done(slp, cb)
1939 struct scsi_low_softc *slp;
1940 struct slccb *cb;
1941 {
1942 struct targ_info *ti;
1943 struct lun_info *li;
1944
1945 ti = cb->ti;
1946 li = cb->li;
1947
1948 if (cb->ccb_rcnt >= slp->sl_max_retry)
1949 {
1950 cb->ccb_error |= ABORTIO;
1951 return SCSI_LOW_DONE_COMPLETE;
1952 }
1953
1954 /* XXX: special huck for selection timeout */
1955 if (li->li_state == SCSI_LOW_LUN_SLEEP &&
1956 (cb->ccb_error & SELTIMEOUTIO) != 0)
1957 {
1958 cb->ccb_error |= ABORTIO;
1959 return SCSI_LOW_DONE_COMPLETE;
1960 }
1961
1962 switch(li->li_state)
1963 {
1964 case SCSI_LOW_LUN_INQ:
1965 if (cb->ccb_error != 0)
1966 {
1967 li->li_diskflags &=
1968 ~(SCSI_LOW_DISK_LINK | SCSI_LOW_DISK_QTAG);
1969 if (li->li_lun > 0)
1970 goto resume;
1971 ti->ti_diskflags &=
1972 ~(SCSI_LOW_DISK_SYNC | SCSI_LOW_DISK_WIDE);
1973 }
1974 else if ((li->li_inq.sd_version & 7) >= 2 ||
1975 (li->li_inq.sd_len >= 4))
1976 {
1977 if ((li->li_inq.sd_support & 0x2) == 0)
1978 li->li_diskflags &= ~SCSI_LOW_DISK_QTAG;
1979 if ((li->li_inq.sd_support & 0x8) == 0)
1980 li->li_diskflags &= ~SCSI_LOW_DISK_LINK;
1981 if (li->li_lun > 0)
1982 goto resume;
1983 if ((li->li_inq.sd_support & 0x10) == 0)
1984 ti->ti_diskflags &= ~SCSI_LOW_DISK_SYNC;
1985 if ((li->li_inq.sd_support & 0x20) == 0)
1986 ti->ti_diskflags &= ~SCSI_LOW_DISK_WIDE_16;
1987 if ((li->li_inq.sd_support & 0x40) == 0)
1988 ti->ti_diskflags &= ~SCSI_LOW_DISK_WIDE_32;
1989 }
1990 else
1991 {
1992 li->li_diskflags &=
1993 ~(SCSI_LOW_DISK_QTAG | SCSI_LOW_DISK_LINK);
1994 if (li->li_lun > 0)
1995 goto resume;
1996 ti->ti_diskflags &= ~SCSI_LOW_DISK_WIDE;
1997 }
1998 ti->ti_flags_valid |= SCSI_LOW_TARG_FLAGS_DISK_VALID;
1999 resume:
2000 scsi_low_calcf_target(ti);
2001 scsi_low_calcf_lun(li);
2002 break;
2003
2004 case SCSI_LOW_LUN_MODEQ:
2005 if (cb->ccb_error != 0)
2006 {
2007 if (cb->ccb_error & SENSEIO)
2008 {
2009 #ifdef SCSI_LOW_DEBUG
2010 if (scsi_low_debug & SCSI_LOW_DEBUG_SENSE)
2011 {
2012 int error_code, sense_key, asc, ascq;
2013
2014 scsi_extract_sense(&cb->ccb_sense,
2015 &error_code,
2016 &sense_key,
2017 &asc,
2018 &ascq);
2019 printf("SENSE: [%x][%x][%x][%x]\n",
2020 error_code, sense_key, asc,
2021 ascq);
2022 }
2023 #endif /* SCSI_LOW_DEBUG */
2024 }
2025 else
2026 {
2027 li->li_diskflags &= ~SCSI_LOW_DISK_QTAG;
2028 }
2029 }
2030 else if ((li->li_sms.sms_cmp.cmp_page & 0x3f) == 0x0a)
2031 {
2032 if (li->li_sms.sms_cmp.cmp_qc & 0x02)
2033 li->li_qflags |= SCSI_LOW_QFLAG_CA_QCLEAR;
2034 else
2035 li->li_qflags &= ~SCSI_LOW_QFLAG_CA_QCLEAR;
2036 if ((li->li_sms.sms_cmp.cmp_qc & 0x01) != 0)
2037 li->li_diskflags &= ~SCSI_LOW_DISK_QTAG;
2038 }
2039 li->li_flags_valid |= SCSI_LOW_LUN_FLAGS_DISK_VALID;
2040 scsi_low_calcf_lun(li);
2041 break;
2042
2043 default:
2044 break;
2045 }
2046
2047 li->li_state ++;
2048 if (li->li_state == SCSI_LOW_LUN_OK)
2049 {
2050 scsi_low_calcf_target(ti);
2051 scsi_low_calcf_lun(li);
2052 if (li->li_flags_valid == SCSI_LOW_LUN_FLAGS_ALL_VALID &&
2053 (slp->sl_show_result & SHOW_CALCF_RES) != 0)
2054 {
2055 scsi_low_calcf_show(li);
2056 }
2057 }
2058
2059 cb->ccb_rcnt --;
2060 return SCSI_LOW_DONE_RETRY;
2061 }
2062
2063 static int
scsi_low_done(slp,cb)2064 scsi_low_done(slp, cb)
2065 struct scsi_low_softc *slp;
2066 struct slccb *cb;
2067 {
2068 int rv;
2069
2070 if (cb->ccb_error == 0)
2071 {
2072 if ((cb->ccb_flags & (CCB_SENSE | CCB_CLEARQ)) != 0)
2073 {
2074 #ifdef SCSI_LOW_QCLEAR_AFTER_CA
2075 /* XXX:
2076 * SCSI-2 draft suggests
2077 * page 0x0a QErr bit determins if
2078 * the target aborts or continues
2079 * the queueing io's after CA state resolved.
2080 * However many targets seem not to support
2081 * the page 0x0a. Thus we should manually clear the
2082 * queuing io's after CA state.
2083 */
2084 if ((cb->ccb_flags & CCB_CLEARQ) == 0)
2085 {
2086 cb->ccb_rcnt --;
2087 cb->ccb_flags |= CCB_CLEARQ;
2088 goto retry;
2089 }
2090 #endif /* SCSI_LOW_QCLEAR_AFTER_CA */
2091
2092 if ((cb->ccb_flags & CCB_SENSE) != 0)
2093 cb->ccb_error |= (SENSEIO | ABORTIO);
2094 cb->ccb_flags &= ~(CCB_SENSE | CCB_CLEARQ);
2095 }
2096 else switch (cb->ccb_sscp.scp_status)
2097 {
2098 case ST_GOOD:
2099 case ST_MET:
2100 case ST_INTERGOOD:
2101 case ST_INTERMET:
2102 if (cb->ccb_datalen == 0 ||
2103 cb->ccb_scp.scp_datalen == 0)
2104 break;
2105
2106 if (cb->ccb_scp.scp_cmdlen > 0 &&
2107 (scsi_low_cmd_flags[cb->ccb_scp.scp_cmd[0]] &
2108 SCSI_LOW_CMD_RESIDUAL_CHK) == 0)
2109 break;
2110
2111 cb->ccb_error |= PDMAERR;
2112 break;
2113
2114 case ST_BUSY:
2115 case ST_QUEFULL:
2116 cb->ccb_error |= (BUSYERR | STATERR);
2117 break;
2118
2119 case ST_CONFLICT:
2120 cb->ccb_error |= (STATERR | ABORTIO);
2121 break;
2122
2123 case ST_CHKCOND:
2124 case ST_CMDTERM:
2125 if (cb->ccb_flags & (CCB_AUTOSENSE | CCB_INTERNAL))
2126 {
2127 cb->ccb_rcnt --;
2128 cb->ccb_flags |= CCB_SENSE;
2129 goto retry;
2130 }
2131 cb->ccb_error |= (UACAERR | STATERR | ABORTIO);
2132 break;
2133
2134 case ST_UNKNOWN:
2135 default:
2136 cb->ccb_error |= FATALIO;
2137 break;
2138 }
2139 }
2140 else
2141 {
2142 if (cb->ccb_flags & CCB_SENSE)
2143 {
2144 cb->ccb_error |= (SENSEERR | ABORTIO);
2145 }
2146 cb->ccb_flags &= ~(CCB_CLEARQ | CCB_SENSE);
2147 }
2148
2149 /* internal ccb */
2150 if ((cb->ccb_flags & CCB_INTERNAL) != 0)
2151 {
2152 if (scsi_low_setup_done(slp, cb) == SCSI_LOW_DONE_RETRY)
2153 goto retry;
2154 }
2155
2156 /* check a ccb msgout flag */
2157 if (cb->ccb_omsgoutflag != 0)
2158 {
2159 #define SCSI_LOW_MSG_ABORT_OK (SCSI_LOW_MSG_ABORT | \
2160 SCSI_LOW_MSG_ABORT_QTAG | \
2161 SCSI_LOW_MSG_CLEAR_QTAG | \
2162 SCSI_LOW_MSG_TERMIO)
2163
2164 if ((cb->ccb_omsgoutflag & SCSI_LOW_MSG_ABORT_OK) != 0)
2165 {
2166 cb->ccb_error |= ABORTIO;
2167 }
2168 }
2169
2170 /* call OS depend done */
2171 if (cb->osdep != NULL)
2172 {
2173 rv = scsi_low_done_cam(slp, cb);
2174 if (rv == EJUSTRETURN)
2175 goto retry;
2176 }
2177 else if (cb->ccb_error != 0)
2178 {
2179 if (cb->ccb_rcnt >= slp->sl_max_retry)
2180 cb->ccb_error |= ABORTIO;
2181
2182 if ((cb->ccb_flags & CCB_NORETRY) == 0 &&
2183 (cb->ccb_error & ABORTIO) == 0)
2184 goto retry;
2185 }
2186
2187 /* free our target */
2188 #ifdef SCSI_LOW_DEBUG
2189 if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_DONE, cb->ti->ti_id) != 0)
2190 {
2191 printf(">> SCSI_LOW_DONE_COMPLETE ===============\n");
2192 scsi_low_print(slp, NULL);
2193 }
2194 #endif /* SCSI_LOW_DEBUG */
2195
2196 scsi_low_deactivate_qtag(cb);
2197 scsi_low_dealloc_qtag(cb);
2198 scsi_low_free_ccb(cb);
2199 slp->sl_nio --;
2200 return SCSI_LOW_DONE_COMPLETE;
2201
2202 retry:
2203 #ifdef SCSI_LOW_DEBUG
2204 if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_DONE, cb->ti->ti_id) != 0)
2205 {
2206 printf("** SCSI_LOW_DONE_RETRY ===============\n");
2207 scsi_low_print(slp, NULL);
2208 }
2209 #endif /* SCSI_LOW_DEBUG */
2210
2211 cb->ccb_rcnt ++;
2212 scsi_low_deactivate_qtag(cb);
2213 scsi_low_ccb_message_retry(cb);
2214 return SCSI_LOW_DONE_RETRY;
2215 }
2216
2217 /**************************************************************
2218 * Reset
2219 **************************************************************/
2220 static void
scsi_low_reset_nexus_target(slp,ti,fdone)2221 scsi_low_reset_nexus_target(slp, ti, fdone)
2222 struct scsi_low_softc *slp;
2223 struct targ_info *ti;
2224 int fdone;
2225 {
2226 struct lun_info *li;
2227
2228 for (li = LIST_FIRST(&ti->ti_litab); li != NULL;
2229 li = LIST_NEXT(li, lun_chain))
2230 {
2231 scsi_low_reset_nexus_lun(slp, li, fdone);
2232 li->li_state = SCSI_LOW_LUN_SLEEP;
2233 li->li_maxnqio = 0;
2234 }
2235
2236 ti->ti_disc = 0;
2237 ti->ti_setup_msg = 0;
2238 ti->ti_setup_msg_done = 0;
2239
2240 ti->ti_osynch.offset = ti->ti_osynch.period = 0;
2241 ti->ti_owidth = SCSI_LOW_BUS_WIDTH_8;
2242
2243 ti->ti_diskflags = SCSI_LOW_DISK_TFLAGS;
2244 ti->ti_flags_valid &= ~SCSI_LOW_TARG_FLAGS_DISK_VALID;
2245
2246 if (slp->sl_funcs->scsi_low_targ_init != NULL)
2247 {
2248 ((*slp->sl_funcs->scsi_low_targ_init)
2249 (slp, ti, SCSI_LOW_INFO_REVOKE));
2250 }
2251 scsi_low_calcf_target(ti);
2252
2253 for (li = LIST_FIRST(&ti->ti_litab); li != NULL;
2254 li = LIST_NEXT(li, lun_chain))
2255 {
2256 li->li_flags = 0;
2257
2258 li->li_diskflags = SCSI_LOW_DISK_LFLAGS;
2259 li->li_flags_valid &= ~SCSI_LOW_LUN_FLAGS_DISK_VALID;
2260
2261 if (slp->sl_funcs->scsi_low_lun_init != NULL)
2262 {
2263 ((*slp->sl_funcs->scsi_low_lun_init)
2264 (slp, ti, li, SCSI_LOW_INFO_REVOKE));
2265 }
2266 scsi_low_calcf_lun(li);
2267 }
2268 }
2269
2270 static void
scsi_low_reset_nexus(slp,fdone)2271 scsi_low_reset_nexus(slp, fdone)
2272 struct scsi_low_softc *slp;
2273 int fdone;
2274 {
2275 struct targ_info *ti;
2276 struct slccb *cb, *topcb;
2277
2278 if ((cb = slp->sl_Qnexus) != NULL)
2279 {
2280 topcb = scsi_low_revoke_ccb(slp, cb, fdone);
2281 }
2282 else
2283 {
2284 topcb = NULL;
2285 }
2286
2287 for (ti = TAILQ_FIRST(&slp->sl_titab); ti != NULL;
2288 ti = TAILQ_NEXT(ti, ti_chain))
2289 {
2290 scsi_low_reset_nexus_target(slp, ti, fdone);
2291 scsi_low_bus_release(slp, ti);
2292 scsi_low_init_msgsys(slp, ti);
2293 }
2294
2295 if (topcb != NULL)
2296 {
2297 topcb->ccb_flags |= CCB_STARTQ;
2298 TAILQ_INSERT_HEAD(&slp->sl_start, topcb, ccb_chain);
2299 }
2300
2301 slp->sl_disc = 0;
2302 slp->sl_retry_sel = 0;
2303 slp->sl_flags &= ~HW_PDMASTART;
2304 }
2305
2306 /* misc */
2307 static int tw_pos;
2308 static char tw_chars[] = "|/-\\";
2309 #define TWIDDLEWAIT 10000
2310
2311 static void
scsi_low_twiddle_wait(void)2312 scsi_low_twiddle_wait(void)
2313 {
2314
2315 cnputc('\b');
2316 cnputc(tw_chars[tw_pos++]);
2317 tw_pos %= (sizeof(tw_chars) - 1);
2318 DELAY(TWIDDLEWAIT);
2319 }
2320
2321 void
scsi_low_bus_reset(slp)2322 scsi_low_bus_reset(slp)
2323 struct scsi_low_softc *slp;
2324 {
2325 int i;
2326
2327 (*slp->sl_funcs->scsi_low_bus_reset) (slp);
2328
2329 device_printf(slp->sl_dev, "try to reset scsi bus ");
2330 for (i = 0; i <= SCSI2_RESET_DELAY / TWIDDLEWAIT ; i++)
2331 scsi_low_twiddle_wait();
2332 cnputc('\b');
2333 printf("\n");
2334 }
2335
2336 int
scsi_low_restart(slp,flags,s)2337 scsi_low_restart(slp, flags, s)
2338 struct scsi_low_softc *slp;
2339 int flags;
2340 u_char *s;
2341 {
2342 int error;
2343
2344 if (s != NULL)
2345 device_printf(slp->sl_dev, "scsi bus restart. reason: %s\n", s);
2346
2347 if ((error = scsi_low_init(slp, flags)) != 0)
2348 return error;
2349
2350 scsi_low_start(slp);
2351 return 0;
2352 }
2353
2354 /**************************************************************
2355 * disconnect and reselect
2356 **************************************************************/
2357 #define MSGCMD_LUN(msg) (msg & 0x07)
2358
2359 static struct slccb *
scsi_low_establish_ccb(ti,li,tag)2360 scsi_low_establish_ccb(ti, li, tag)
2361 struct targ_info *ti;
2362 struct lun_info *li;
2363 scsi_low_tag_t tag;
2364 {
2365 struct scsi_low_softc *slp = ti->ti_sc;
2366 struct slccb *cb;
2367
2368 if (li == NULL)
2369 return NULL;
2370
2371 cb = TAILQ_FIRST(&li->li_discq);
2372 for ( ; cb != NULL; cb = TAILQ_NEXT(cb, ccb_chain))
2373 if (cb->ccb_tag == tag)
2374 goto found;
2375 return cb;
2376
2377 /*
2378 * establish our ccb nexus
2379 */
2380 found:
2381 #ifdef SCSI_LOW_DEBUG
2382 if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_NEXUS_CHECK, ti->ti_id) != 0)
2383 {
2384 device_printf(slp->sl_dev, "nexus(0x%lx) abort check start\n",
2385 (u_long) cb);
2386 cb->ccb_flags |= (CCB_NORETRY | CCB_SILENT);
2387 scsi_low_revoke_ccb(slp, cb, 1);
2388 return NULL;
2389 }
2390
2391 if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_ATTEN_CHECK, ti->ti_id) != 0)
2392 {
2393 if (cb->ccb_omsgoutflag == 0)
2394 scsi_low_ccb_message_assert(cb, SCSI_LOW_MSG_NOOP);
2395 }
2396 #endif /* SCSI_LOW_DEBUG */
2397
2398 TAILQ_REMOVE(&li->li_discq, cb, ccb_chain);
2399 cb->ccb_flags &= ~CCB_DISCQ;
2400 slp->sl_Qnexus = cb;
2401
2402 slp->sl_scp = cb->ccb_sscp;
2403 slp->sl_error |= cb->ccb_error;
2404
2405 slp->sl_disc --;
2406 ti->ti_disc --;
2407 li->li_disc --;
2408
2409 /* inform "ccb nexus established" to the host driver */
2410 (*slp->sl_funcs->scsi_low_establish_ccb_nexus) (slp);
2411
2412 /* check msg */
2413 if (cb->ccb_msgoutflag != 0)
2414 {
2415 scsi_low_ccb_message_exec(slp, cb);
2416 }
2417
2418 return cb;
2419 }
2420
2421 struct targ_info *
scsi_low_reselected(slp,targ)2422 scsi_low_reselected(slp, targ)
2423 struct scsi_low_softc *slp;
2424 u_int targ;
2425 {
2426 struct targ_info *ti;
2427 struct slccb *cb;
2428 u_char *s;
2429
2430 /*
2431 * Check select vs reselected collision.
2432 */
2433
2434 if ((cb = slp->sl_selid) != NULL)
2435 {
2436 scsi_low_arbit_fail(slp, cb);
2437 #ifdef SCSI_LOW_STATICS
2438 scsi_low_statics.nexus_conflict ++;
2439 #endif /* SCSI_LOW_STATICS */
2440 }
2441
2442 /*
2443 * Check if no current active nexus.
2444 */
2445 if (slp->sl_Tnexus != NULL)
2446 {
2447 s = "host busy";
2448 goto world_restart;
2449 }
2450
2451 /*
2452 * Check a valid target id asserted ?
2453 */
2454 if (targ >= slp->sl_ntargs || targ == slp->sl_hostid)
2455 {
2456 s = "scsi id illegal";
2457 goto world_restart;
2458 }
2459
2460 /*
2461 * Check the target scsi status.
2462 */
2463 ti = slp->sl_ti[targ];
2464 if (ti->ti_phase != PH_DISC && ti->ti_phase != PH_NULL)
2465 {
2466 s = "phase mismatch";
2467 goto world_restart;
2468 }
2469
2470 /*
2471 * Setup init msgsys
2472 */
2473 slp->sl_error = 0;
2474 scsi_low_init_msgsys(slp, ti);
2475
2476 /*
2477 * Establish our target nexus
2478 */
2479 SCSI_LOW_SETUP_PHASE(ti, PH_RESEL);
2480 slp->sl_Tnexus = ti;
2481 #ifdef SCSI_LOW_STATICS
2482 scsi_low_statics.nexus_reselected ++;
2483 #endif /* SCSI_LOW_STATICS */
2484 return ti;
2485
2486 world_restart:
2487 device_printf(slp->sl_dev, "reselect(%x:unknown) %s\n", targ, s);
2488 scsi_low_restart(slp, SCSI_LOW_RESTART_HARD,
2489 "reselect: scsi world confused");
2490 return NULL;
2491 }
2492
2493 /**************************************************************
2494 * cmd out pointer setup
2495 **************************************************************/
2496 int
scsi_low_cmd(slp,ti)2497 scsi_low_cmd(slp, ti)
2498 struct scsi_low_softc *slp;
2499 struct targ_info *ti;
2500 {
2501 struct slccb *cb = slp->sl_Qnexus;
2502
2503 slp->sl_ph_count ++;
2504 if (cb == NULL)
2505 {
2506 /*
2507 * no ccb, abort!
2508 */
2509 slp->sl_scp.scp_cmd = (u_int8_t *) &unit_ready_cmd;
2510 slp->sl_scp.scp_cmdlen = sizeof(unit_ready_cmd);
2511 slp->sl_scp.scp_datalen = 0;
2512 slp->sl_scp.scp_direction = SCSI_LOW_READ;
2513 slp->sl_error |= FATALIO;
2514 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
2515 SCSI_LOW_INFO(slp, ti, "CMDOUT: ccb nexus not found");
2516 return EINVAL;
2517 }
2518 else
2519 {
2520 #ifdef SCSI_LOW_DEBUG
2521 if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_CMDLNK_CHECK, ti->ti_id))
2522 {
2523 scsi_low_test_cmdlnk(slp, cb);
2524 }
2525 #endif /* SCSI_LOW_DEBUG */
2526 }
2527 return 0;
2528 }
2529
2530 /**************************************************************
2531 * data out pointer setup
2532 **************************************************************/
2533 int
scsi_low_data(slp,ti,bp,direction)2534 scsi_low_data(slp, ti, bp, direction)
2535 struct scsi_low_softc *slp;
2536 struct targ_info *ti;
2537 struct buf **bp;
2538 int direction;
2539 {
2540 struct slccb *cb = slp->sl_Qnexus;
2541
2542 if (cb != NULL && direction == cb->ccb_sscp.scp_direction)
2543 {
2544 *bp = cb->bp;
2545 return 0;
2546 }
2547
2548 slp->sl_error |= (FATALIO | PDMAERR);
2549 slp->sl_scp.scp_datalen = 0;
2550 slp->sl_scp.scp_direction = direction;
2551 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
2552 if (ti->ti_ophase != ti->ti_phase)
2553 {
2554 char *s;
2555
2556 if (cb == NULL)
2557 s = "DATA PHASE: ccb nexus not found";
2558 else
2559 s = "DATA PHASE: xfer direction mismatch";
2560 SCSI_LOW_INFO(slp, ti, s);
2561 }
2562
2563 *bp = NULL;
2564 return EINVAL;
2565 }
2566
2567 /**************************************************************
2568 * MSG_SYS
2569 **************************************************************/
2570 #define MSGINPTR_CLR(ti) {(ti)->ti_msginptr = 0; (ti)->ti_msginlen = 0;}
2571 #define MSGIN_PERIOD(ti) ((ti)->ti_msgin[3])
2572 #define MSGIN_OFFSET(ti) ((ti)->ti_msgin[4])
2573 #define MSGIN_WIDTHP(ti) ((ti)->ti_msgin[3])
2574 #define MSGIN_DATA_LAST 0x30
2575
2576 static int scsi_low_errfunc_synch(struct scsi_low_softc *, u_int);
2577 static int scsi_low_errfunc_wide(struct scsi_low_softc *, u_int);
2578 static int scsi_low_errfunc_identify(struct scsi_low_softc *, u_int);
2579 static int scsi_low_errfunc_qtag(struct scsi_low_softc *, u_int);
2580
2581 static int scsi_low_msgfunc_synch(struct scsi_low_softc *);
2582 static int scsi_low_msgfunc_wide(struct scsi_low_softc *);
2583 static int scsi_low_msgfunc_identify(struct scsi_low_softc *);
2584 static int scsi_low_msgfunc_abort(struct scsi_low_softc *);
2585 static int scsi_low_msgfunc_qabort(struct scsi_low_softc *);
2586 static int scsi_low_msgfunc_qtag(struct scsi_low_softc *);
2587 static int scsi_low_msgfunc_reset(struct scsi_low_softc *);
2588
2589 struct scsi_low_msgout_data {
2590 u_int md_flags;
2591 u_int8_t md_msg;
2592 int (*md_msgfunc)(struct scsi_low_softc *);
2593 int (*md_errfunc)(struct scsi_low_softc *, u_int);
2594 #define MSG_RELEASE_ATN 0x0001
2595 u_int md_condition;
2596 };
2597
2598 struct scsi_low_msgout_data scsi_low_msgout_data[] = {
2599 /* 0 */ {SCSI_LOW_MSG_RESET, MSG_RESET, scsi_low_msgfunc_reset, NULL, MSG_RELEASE_ATN},
2600 /* 1 */ {SCSI_LOW_MSG_REJECT, MSG_REJECT, NULL, NULL, MSG_RELEASE_ATN},
2601 /* 2 */ {SCSI_LOW_MSG_PARITY, MSG_PARITY, NULL, NULL, MSG_RELEASE_ATN},
2602 /* 3 */ {SCSI_LOW_MSG_ERROR, MSG_I_ERROR, NULL, NULL, MSG_RELEASE_ATN},
2603 /* 4 */ {SCSI_LOW_MSG_IDENTIFY, MSG_IDENTIFY, scsi_low_msgfunc_identify, scsi_low_errfunc_identify, 0},
2604 /* 5 */ {SCSI_LOW_MSG_ABORT, MSG_ABORT, scsi_low_msgfunc_abort, NULL, MSG_RELEASE_ATN},
2605 /* 6 */ {SCSI_LOW_MSG_TERMIO, MSG_TERM_IO, NULL, NULL, MSG_RELEASE_ATN},
2606 /* 7 */ {SCSI_LOW_MSG_SIMPLE_QTAG, MSG_SIMPLE_QTAG, scsi_low_msgfunc_qtag, scsi_low_errfunc_qtag, 0},
2607 /* 8 */ {SCSI_LOW_MSG_ORDERED_QTAG, MSG_ORDERED_QTAG, scsi_low_msgfunc_qtag, scsi_low_errfunc_qtag, 0},
2608 /* 9 */{SCSI_LOW_MSG_HEAD_QTAG, MSG_HEAD_QTAG, scsi_low_msgfunc_qtag, scsi_low_errfunc_qtag, 0},
2609 /* 10 */ {SCSI_LOW_MSG_ABORT_QTAG, MSG_ABORT_QTAG, scsi_low_msgfunc_qabort, NULL, MSG_RELEASE_ATN},
2610 /* 11 */ {SCSI_LOW_MSG_CLEAR_QTAG, MSG_CLEAR_QTAG, scsi_low_msgfunc_abort, NULL, MSG_RELEASE_ATN},
2611 /* 12 */{SCSI_LOW_MSG_WIDE, MSG_EXTEND, scsi_low_msgfunc_wide, scsi_low_errfunc_wide, MSG_RELEASE_ATN},
2612 /* 13 */{SCSI_LOW_MSG_SYNCH, MSG_EXTEND, scsi_low_msgfunc_synch, scsi_low_errfunc_synch, MSG_RELEASE_ATN},
2613 /* 14 */{SCSI_LOW_MSG_NOOP, MSG_NOOP, NULL, NULL, MSG_RELEASE_ATN},
2614 /* 15 */{SCSI_LOW_MSG_ALL, 0},
2615 };
2616
2617 static int scsi_low_msginfunc_ext(struct scsi_low_softc *);
2618 static int scsi_low_synch(struct scsi_low_softc *);
2619 static int scsi_low_wide(struct scsi_low_softc *);
2620 static int scsi_low_msginfunc_msg_reject(struct scsi_low_softc *);
2621 static int scsi_low_msginfunc_rejop(struct scsi_low_softc *);
2622 static int scsi_low_msginfunc_rp(struct scsi_low_softc *);
2623 static int scsi_low_msginfunc_sdp(struct scsi_low_softc *);
2624 static int scsi_low_msginfunc_disc(struct scsi_low_softc *);
2625 static int scsi_low_msginfunc_cc(struct scsi_low_softc *);
2626 static int scsi_low_msginfunc_lcc(struct scsi_low_softc *);
2627 static int scsi_low_msginfunc_parity(struct scsi_low_softc *);
2628 static int scsi_low_msginfunc_noop(struct scsi_low_softc *);
2629 static int scsi_low_msginfunc_simple_qtag(struct scsi_low_softc *);
2630 static int scsi_low_msginfunc_i_wide_residue(struct scsi_low_softc *);
2631
2632 struct scsi_low_msgin_data {
2633 u_int md_len;
2634 int (*md_msgfunc)(struct scsi_low_softc *);
2635 };
2636
2637 struct scsi_low_msgin_data scsi_low_msgin_data[] = {
2638 /* 0 */ {1, scsi_low_msginfunc_cc},
2639 /* 1 */ {2, scsi_low_msginfunc_ext},
2640 /* 2 */ {1, scsi_low_msginfunc_sdp},
2641 /* 3 */ {1, scsi_low_msginfunc_rp},
2642 /* 4 */ {1, scsi_low_msginfunc_disc},
2643 /* 5 */ {1, scsi_low_msginfunc_rejop},
2644 /* 6 */ {1, scsi_low_msginfunc_rejop},
2645 /* 7 */ {1, scsi_low_msginfunc_msg_reject},
2646 /* 8 */ {1, scsi_low_msginfunc_noop},
2647 /* 9 */ {1, scsi_low_msginfunc_parity},
2648 /* a */ {1, scsi_low_msginfunc_lcc},
2649 /* b */ {1, scsi_low_msginfunc_lcc},
2650 /* c */ {1, scsi_low_msginfunc_rejop},
2651 /* d */ {2, scsi_low_msginfunc_rejop},
2652 /* e */ {1, scsi_low_msginfunc_rejop},
2653 /* f */ {1, scsi_low_msginfunc_rejop},
2654 /* 0x10 */ {1, scsi_low_msginfunc_rejop},
2655 /* 0x11 */ {1, scsi_low_msginfunc_rejop},
2656 /* 0x12 */ {1, scsi_low_msginfunc_rejop},
2657 /* 0x13 */ {1, scsi_low_msginfunc_rejop},
2658 /* 0x14 */ {1, scsi_low_msginfunc_rejop},
2659 /* 0x15 */ {1, scsi_low_msginfunc_rejop},
2660 /* 0x16 */ {1, scsi_low_msginfunc_rejop},
2661 /* 0x17 */ {1, scsi_low_msginfunc_rejop},
2662 /* 0x18 */ {1, scsi_low_msginfunc_rejop},
2663 /* 0x19 */ {1, scsi_low_msginfunc_rejop},
2664 /* 0x1a */ {1, scsi_low_msginfunc_rejop},
2665 /* 0x1b */ {1, scsi_low_msginfunc_rejop},
2666 /* 0x1c */ {1, scsi_low_msginfunc_rejop},
2667 /* 0x1d */ {1, scsi_low_msginfunc_rejop},
2668 /* 0x1e */ {1, scsi_low_msginfunc_rejop},
2669 /* 0x1f */ {1, scsi_low_msginfunc_rejop},
2670 /* 0x20 */ {2, scsi_low_msginfunc_simple_qtag},
2671 /* 0x21 */ {2, scsi_low_msginfunc_rejop},
2672 /* 0x22 */ {2, scsi_low_msginfunc_rejop},
2673 /* 0x23 */ {2, scsi_low_msginfunc_i_wide_residue},
2674 /* 0x24 */ {2, scsi_low_msginfunc_rejop},
2675 /* 0x25 */ {2, scsi_low_msginfunc_rejop},
2676 /* 0x26 */ {2, scsi_low_msginfunc_rejop},
2677 /* 0x27 */ {2, scsi_low_msginfunc_rejop},
2678 /* 0x28 */ {2, scsi_low_msginfunc_rejop},
2679 /* 0x29 */ {2, scsi_low_msginfunc_rejop},
2680 /* 0x2a */ {2, scsi_low_msginfunc_rejop},
2681 /* 0x2b */ {2, scsi_low_msginfunc_rejop},
2682 /* 0x2c */ {2, scsi_low_msginfunc_rejop},
2683 /* 0x2d */ {2, scsi_low_msginfunc_rejop},
2684 /* 0x2e */ {2, scsi_low_msginfunc_rejop},
2685 /* 0x2f */ {2, scsi_low_msginfunc_rejop},
2686 /* 0x30 */ {1, scsi_low_msginfunc_rejop} /* default rej op */
2687 };
2688
2689 /**************************************************************
2690 * msgout
2691 **************************************************************/
2692 static int
scsi_low_msgfunc_synch(slp)2693 scsi_low_msgfunc_synch(slp)
2694 struct scsi_low_softc *slp;
2695 {
2696 struct targ_info *ti = slp->sl_Tnexus;
2697 int ptr = ti->ti_msgoutlen;
2698
2699 ti->ti_msgoutstr[ptr + 1] = MSG_EXTEND_SYNCHLEN;
2700 ti->ti_msgoutstr[ptr + 2] = MSG_EXTEND_SYNCHCODE;
2701 ti->ti_msgoutstr[ptr + 3] = ti->ti_maxsynch.period;
2702 ti->ti_msgoutstr[ptr + 4] = ti->ti_maxsynch.offset;
2703 return MSG_EXTEND_SYNCHLEN + 2;
2704 }
2705
2706 static int
scsi_low_msgfunc_wide(slp)2707 scsi_low_msgfunc_wide(slp)
2708 struct scsi_low_softc *slp;
2709 {
2710 struct targ_info *ti = slp->sl_Tnexus;
2711 int ptr = ti->ti_msgoutlen;
2712
2713 ti->ti_msgoutstr[ptr + 1] = MSG_EXTEND_WIDELEN;
2714 ti->ti_msgoutstr[ptr + 2] = MSG_EXTEND_WIDECODE;
2715 ti->ti_msgoutstr[ptr + 3] = ti->ti_width;
2716 return MSG_EXTEND_WIDELEN + 2;
2717 }
2718
2719 static int
scsi_low_msgfunc_identify(slp)2720 scsi_low_msgfunc_identify(slp)
2721 struct scsi_low_softc *slp;
2722 {
2723 struct targ_info *ti = slp->sl_Tnexus;
2724 struct lun_info *li = slp->sl_Lnexus;
2725 struct slccb *cb = slp->sl_Qnexus;
2726 int ptr = ti->ti_msgoutlen;
2727 u_int8_t msg;
2728
2729 msg = MSG_IDENTIFY;
2730 if (cb == NULL)
2731 {
2732 slp->sl_error |= FATALIO;
2733 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
2734 SCSI_LOW_INFO(slp, ti, "MSGOUT: nexus unknown");
2735 }
2736 else
2737 {
2738 if (scsi_low_is_disconnect_ok(cb) != 0)
2739 msg |= (MSG_IDENTIFY_DISCPRIV | li->li_lun);
2740 else
2741 msg |= li->li_lun;
2742
2743 if (ti->ti_phase == PH_MSGOUT)
2744 {
2745 (*slp->sl_funcs->scsi_low_establish_lun_nexus) (slp);
2746 if (cb->ccb_tag == SCSI_LOW_UNKTAG)
2747 {
2748 (*slp->sl_funcs->scsi_low_establish_ccb_nexus) (slp);
2749 }
2750 }
2751 }
2752 ti->ti_msgoutstr[ptr + 0] = msg;
2753 return 1;
2754 }
2755
2756 static int
scsi_low_msgfunc_abort(slp)2757 scsi_low_msgfunc_abort(slp)
2758 struct scsi_low_softc *slp;
2759 {
2760
2761 SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_ABORT);
2762 return 1;
2763 }
2764
2765 static int
scsi_low_msgfunc_qabort(slp)2766 scsi_low_msgfunc_qabort(slp)
2767 struct scsi_low_softc *slp;
2768 {
2769
2770 SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_TERM);
2771 return 1;
2772 }
2773
2774 static int
scsi_low_msgfunc_reset(slp)2775 scsi_low_msgfunc_reset(slp)
2776 struct scsi_low_softc *slp;
2777 {
2778
2779 SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_RESET);
2780 return 1;
2781 }
2782
2783 static int
scsi_low_msgfunc_qtag(slp)2784 scsi_low_msgfunc_qtag(slp)
2785 struct scsi_low_softc *slp;
2786 {
2787 struct targ_info *ti = slp->sl_Tnexus;
2788 struct slccb *cb = slp->sl_Qnexus;
2789 int ptr = ti->ti_msgoutlen;
2790
2791 if (cb == NULL || cb->ccb_tag == SCSI_LOW_UNKTAG)
2792 {
2793 ti->ti_msgoutstr[ptr + 0] = MSG_NOOP;
2794 return 1;
2795 }
2796 else
2797 {
2798 ti->ti_msgoutstr[ptr + 1] = (u_int8_t) cb->ccb_tag;
2799 if (ti->ti_phase == PH_MSGOUT)
2800 {
2801 (*slp->sl_funcs->scsi_low_establish_ccb_nexus) (slp);
2802 }
2803 }
2804 return 2;
2805 }
2806
2807 /*
2808 * The following functions are called when targets give unexpected
2809 * responces in msgin (after msgout).
2810 */
2811 static int
scsi_low_errfunc_identify(slp,msgflags)2812 scsi_low_errfunc_identify(slp, msgflags)
2813 struct scsi_low_softc *slp;
2814 u_int msgflags;
2815 {
2816
2817 if (slp->sl_Lnexus != NULL)
2818 {
2819 slp->sl_Lnexus->li_cfgflags &= ~SCSI_LOW_DISC;
2820 scsi_low_calcf_lun(slp->sl_Lnexus);
2821 }
2822 return 0;
2823 }
2824
2825 static int
scsi_low_errfunc_synch(slp,msgflags)2826 scsi_low_errfunc_synch(slp, msgflags)
2827 struct scsi_low_softc *slp;
2828 u_int msgflags;
2829 {
2830 struct targ_info *ti = slp->sl_Tnexus;
2831
2832 MSGIN_PERIOD(ti) = 0;
2833 MSGIN_OFFSET(ti) = 0;
2834 scsi_low_synch(slp);
2835 return 0;
2836 }
2837
2838 static int
scsi_low_errfunc_wide(slp,msgflags)2839 scsi_low_errfunc_wide(slp, msgflags)
2840 struct scsi_low_softc *slp;
2841 u_int msgflags;
2842 {
2843 struct targ_info *ti = slp->sl_Tnexus;
2844
2845 MSGIN_WIDTHP(ti) = 0;
2846 scsi_low_wide(slp);
2847 return 0;
2848 }
2849
2850 static int
scsi_low_errfunc_qtag(slp,msgflags)2851 scsi_low_errfunc_qtag(slp, msgflags)
2852 struct scsi_low_softc *slp;
2853 u_int msgflags;
2854 {
2855
2856 if ((msgflags & SCSI_LOW_MSG_REJECT) != 0)
2857 {
2858 if (slp->sl_Qnexus != NULL)
2859 {
2860 scsi_low_deactivate_qtag(slp->sl_Qnexus);
2861 }
2862 if (slp->sl_Lnexus != NULL)
2863 {
2864 slp->sl_Lnexus->li_cfgflags &= ~SCSI_LOW_QTAG;
2865 scsi_low_calcf_lun(slp->sl_Lnexus);
2866 }
2867 device_printf(slp->sl_dev, "scsi_low: qtag msg rejected\n");
2868 }
2869 return 0;
2870 }
2871
2872
2873 int
scsi_low_msgout(slp,ti,fl)2874 scsi_low_msgout(slp, ti, fl)
2875 struct scsi_low_softc *slp;
2876 struct targ_info *ti;
2877 u_int fl;
2878 {
2879 struct scsi_low_msgout_data *mdp;
2880 int len = 0;
2881
2882 #ifdef SCSI_LOW_DIAGNOSTIC
2883 if (ti != slp->sl_Tnexus)
2884 {
2885 scsi_low_print(slp, NULL);
2886 panic("scsi_low_msgout: Target nexus inconsistent");
2887 }
2888 #endif /* SCSI_LOW_DIAGNOSTIC */
2889
2890 slp->sl_ph_count ++;
2891 if (slp->sl_ph_count > SCSI_LOW_MAX_PHCHANGES)
2892 {
2893 device_printf(slp->sl_dev, "too many phase changes\n");
2894 slp->sl_error |= FATALIO;
2895 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
2896 }
2897
2898 /* STEP I.
2899 * Scsi phase changes.
2900 * Previously msgs asserted are accepted by our target or
2901 * processed by scsi_low_msgin.
2902 * Thus clear all saved informations.
2903 */
2904 if ((fl & SCSI_LOW_MSGOUT_INIT) != 0)
2905 {
2906 ti->ti_omsgflags = 0;
2907 ti->ti_emsgflags = 0;
2908 }
2909 else if (slp->sl_atten == 0)
2910 {
2911 /* STEP II.
2912 * We did not assert attention, however still our target required
2913 * msgs. Resend previous msgs.
2914 */
2915 ti->ti_msgflags |= ti->ti_omsgflags;
2916 ti->ti_omsgflags = 0;
2917 #ifdef SCSI_LOW_DIAGNOSTIC
2918 device_printf(slp->sl_dev, "scsi_low_msgout: retry msgout\n");
2919 #endif /* SCSI_LOW_DIAGNOSTIC */
2920 }
2921
2922 /* STEP III.
2923 * We have no msgs. send MSG_NOOP (OK?)
2924 */
2925 if (scsi_low_is_msgout_continue(ti, 0) == 0)
2926 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_NOOP, 0);
2927
2928 /* STEP IV.
2929 * Process all msgs
2930 */
2931 ti->ti_msgoutlen = 0;
2932 slp->sl_clear_atten = 0;
2933 mdp = &scsi_low_msgout_data[0];
2934 for ( ; mdp->md_flags != SCSI_LOW_MSG_ALL; mdp ++)
2935 {
2936 if ((ti->ti_msgflags & mdp->md_flags) != 0)
2937 {
2938 ti->ti_omsgflags |= mdp->md_flags;
2939 ti->ti_msgflags &= ~mdp->md_flags;
2940 ti->ti_emsgflags = mdp->md_flags;
2941
2942 ti->ti_msgoutstr[ti->ti_msgoutlen] = mdp->md_msg;
2943 if (mdp->md_msgfunc != NULL)
2944 len = (*mdp->md_msgfunc) (slp);
2945 else
2946 len = 1;
2947
2948 #ifdef SCSI_LOW_DIAGNOSTIC
2949 scsi_low_msg_log_write(&ti->ti_log_msgout,
2950 &ti->ti_msgoutstr[ti->ti_msgoutlen], len);
2951 #endif /* SCSI_LOW_DIAGNOSTIC */
2952
2953 ti->ti_msgoutlen += len;
2954 if ((mdp->md_condition & MSG_RELEASE_ATN) != 0)
2955 {
2956 slp->sl_clear_atten = 1;
2957 break;
2958 }
2959
2960 if ((fl & SCSI_LOW_MSGOUT_UNIFY) == 0 ||
2961 ti->ti_msgflags == 0)
2962 break;
2963
2964 if (ti->ti_msgoutlen >= SCSI_LOW_MAX_MSGLEN - 5)
2965 break;
2966 }
2967 }
2968
2969 if (scsi_low_is_msgout_continue(ti, 0) == 0)
2970 slp->sl_clear_atten = 1;
2971
2972 return ti->ti_msgoutlen;
2973 }
2974
2975 /**************************************************************
2976 * msgin
2977 **************************************************************/
2978 static int
scsi_low_msginfunc_noop(slp)2979 scsi_low_msginfunc_noop(slp)
2980 struct scsi_low_softc *slp;
2981 {
2982
2983 return 0;
2984 }
2985
2986 static int
scsi_low_msginfunc_rejop(slp)2987 scsi_low_msginfunc_rejop(slp)
2988 struct scsi_low_softc *slp;
2989 {
2990 struct targ_info *ti = slp->sl_Tnexus;
2991 u_int8_t msg = ti->ti_msgin[0];
2992
2993 device_printf(slp->sl_dev, "MSGIN: msg 0x%x rejected\n", (u_int) msg);
2994 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_REJECT, 0);
2995 return 0;
2996 }
2997
2998 static int
scsi_low_msginfunc_cc(slp)2999 scsi_low_msginfunc_cc(slp)
3000 struct scsi_low_softc *slp;
3001 {
3002 struct lun_info *li;
3003
3004 SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_CMDC);
3005
3006 /* validate status */
3007 if (slp->sl_Qnexus == NULL)
3008 return ENOENT;
3009
3010 slp->sl_Qnexus->ccb_sscp.scp_status = slp->sl_scp.scp_status;
3011 li = slp->sl_Lnexus;
3012 switch (slp->sl_scp.scp_status)
3013 {
3014 case ST_GOOD:
3015 li->li_maxnqio = li->li_maxnexus;
3016 break;
3017
3018 case ST_CHKCOND:
3019 li->li_maxnqio = 0;
3020 if (li->li_qflags & SCSI_LOW_QFLAG_CA_QCLEAR)
3021 scsi_low_reset_nexus_lun(slp, li, 0);
3022 break;
3023
3024 case ST_BUSY:
3025 li->li_maxnqio = 0;
3026 break;
3027
3028 case ST_QUEFULL:
3029 if (li->li_maxnexus >= li->li_nqio)
3030 li->li_maxnexus = li->li_nqio - 1;
3031 li->li_maxnqio = li->li_maxnexus;
3032 break;
3033
3034 case ST_INTERGOOD:
3035 case ST_INTERMET:
3036 slp->sl_error |= MSGERR;
3037 break;
3038
3039 default:
3040 break;
3041 }
3042 return 0;
3043 }
3044
3045 static int
scsi_low_msginfunc_lcc(slp)3046 scsi_low_msginfunc_lcc(slp)
3047 struct scsi_low_softc *slp;
3048 {
3049 struct targ_info *ti;
3050 struct lun_info *li;
3051 struct slccb *ncb, *cb;
3052
3053 ti = slp->sl_Tnexus;
3054 li = slp->sl_Lnexus;
3055 if ((cb = slp->sl_Qnexus) == NULL)
3056 goto bad;
3057
3058 cb->ccb_sscp.scp_status = slp->sl_scp.scp_status;
3059 switch (slp->sl_scp.scp_status)
3060 {
3061 case ST_INTERGOOD:
3062 case ST_INTERMET:
3063 li->li_maxnqio = li->li_maxnexus;
3064 break;
3065
3066 default:
3067 slp->sl_error |= MSGERR;
3068 break;
3069 }
3070
3071 if ((li->li_flags & SCSI_LOW_LINK) == 0)
3072 goto bad;
3073
3074 cb->ccb_error |= slp->sl_error;
3075 if (cb->ccb_error != 0)
3076 goto bad;
3077
3078 for (ncb = TAILQ_FIRST(&slp->sl_start); ncb != NULL;
3079 ncb = TAILQ_NEXT(ncb, ccb_chain))
3080 {
3081 if (ncb->li == li)
3082 goto cmd_link_start;
3083 }
3084
3085
3086 bad:
3087 SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_LCTERM);
3088 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_REJECT, 0);
3089 return EIO;
3090
3091 cmd_link_start:
3092 ncb->ccb_flags &= ~CCB_STARTQ;
3093 TAILQ_REMOVE(&slp->sl_start, ncb, ccb_chain);
3094
3095 scsi_low_dealloc_qtag(ncb);
3096 ncb->ccb_tag = cb->ccb_tag;
3097 ncb->ccb_otag = cb->ccb_otag;
3098 cb->ccb_tag = SCSI_LOW_UNKTAG;
3099 cb->ccb_otag = SCSI_LOW_UNKTAG;
3100 if (scsi_low_done(slp, cb) == SCSI_LOW_DONE_RETRY)
3101 panic("%s: linked ccb retried",
3102 device_get_nameunit(slp->sl_dev));
3103
3104 slp->sl_Qnexus = ncb;
3105 slp->sl_ph_count = 0;
3106
3107 ncb->ccb_error = 0;
3108 ncb->ccb_datalen = -1;
3109 ncb->ccb_scp.scp_status = ST_UNKNOWN;
3110 ncb->ccb_flags &= ~CCB_INTERNAL;
3111
3112 scsi_low_init_msgsys(slp, ti);
3113
3114 scsi_low_ccb_setup_cam(slp, ncb);
3115
3116 if (ncb->ccb_tcmax < SCSI_LOW_MIN_TOUT)
3117 ncb->ccb_tcmax = SCSI_LOW_MIN_TOUT;
3118 ncb->ccb_tc = ncb->ccb_tcmax;
3119
3120 /* setup saved scsi data pointer */
3121 ncb->ccb_sscp = ncb->ccb_scp;
3122 slp->sl_scp = ncb->ccb_sscp;
3123 slp->sl_error = ncb->ccb_error;
3124
3125 #ifdef SCSI_LOW_DIAGNOSTIC
3126 scsi_low_msg_log_init(&ti->ti_log_msgin);
3127 scsi_low_msg_log_init(&ti->ti_log_msgout);
3128 #endif /* SCSI_LOW_DIAGNOSTIC */
3129 return EJUSTRETURN;
3130 }
3131
3132 static int
scsi_low_msginfunc_disc(slp)3133 scsi_low_msginfunc_disc(slp)
3134 struct scsi_low_softc *slp;
3135 {
3136
3137 SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_DISC);
3138 return 0;
3139 }
3140
3141 static int
scsi_low_msginfunc_sdp(slp)3142 scsi_low_msginfunc_sdp(slp)
3143 struct scsi_low_softc *slp;
3144 {
3145 struct slccb *cb = slp->sl_Qnexus;
3146
3147 if (cb != NULL)
3148 {
3149 cb->ccb_sscp.scp_datalen = slp->sl_scp.scp_datalen;
3150 cb->ccb_sscp.scp_data = slp->sl_scp.scp_data;
3151 }
3152 else
3153 scsi_low_assert_msg(slp, slp->sl_Tnexus, SCSI_LOW_MSG_REJECT, 0);
3154 return 0;
3155 }
3156
3157 static int
scsi_low_msginfunc_rp(slp)3158 scsi_low_msginfunc_rp(slp)
3159 struct scsi_low_softc *slp;
3160 {
3161
3162 if (slp->sl_Qnexus != NULL)
3163 slp->sl_scp = slp->sl_Qnexus->ccb_sscp;
3164 else
3165 scsi_low_assert_msg(slp, slp->sl_Tnexus, SCSI_LOW_MSG_REJECT, 0);
3166 return 0;
3167 }
3168
3169 static int
scsi_low_synch(slp)3170 scsi_low_synch(slp)
3171 struct scsi_low_softc *slp;
3172 {
3173 struct targ_info *ti = slp->sl_Tnexus;
3174 u_int period = 0, offset = 0, speed;
3175 u_char *s;
3176 int error;
3177
3178 if ((MSGIN_PERIOD(ti) >= ti->ti_maxsynch.period &&
3179 MSGIN_OFFSET(ti) <= ti->ti_maxsynch.offset) ||
3180 MSGIN_OFFSET(ti) == 0)
3181 {
3182 if ((offset = MSGIN_OFFSET(ti)) != 0)
3183 period = MSGIN_PERIOD(ti);
3184 s = offset ? "synchronous" : "async";
3185 }
3186 else
3187 {
3188 /* XXX:
3189 * Target seems to be brain damaged.
3190 * Force async transfer.
3191 */
3192 ti->ti_maxsynch.period = 0;
3193 ti->ti_maxsynch.offset = 0;
3194 device_printf(slp->sl_dev,
3195 "target brain damaged. async transfer\n");
3196 return EINVAL;
3197 }
3198
3199 ti->ti_maxsynch.period = period;
3200 ti->ti_maxsynch.offset = offset;
3201
3202 error = (*slp->sl_funcs->scsi_low_msg) (slp, ti, SCSI_LOW_MSG_SYNCH);
3203 if (error != 0)
3204 {
3205 /* XXX:
3206 * Current period and offset are not acceptable
3207 * for our adapter.
3208 * The adapter changes max synch and max offset.
3209 */
3210 device_printf(slp->sl_dev,
3211 "synch neg failed. retry synch msg neg ...\n");
3212 return error;
3213 }
3214
3215 ti->ti_osynch = ti->ti_maxsynch;
3216 if (offset > 0)
3217 {
3218 ti->ti_setup_msg_done |= SCSI_LOW_MSG_SYNCH;
3219 }
3220
3221 /* inform data */
3222 if ((slp->sl_show_result & SHOW_SYNCH_NEG) != 0)
3223 {
3224 #ifdef SCSI_LOW_NEGOTIATE_BEFORE_SENSE
3225 struct slccb *cb = slp->sl_Qnexus;
3226
3227 if (cb != NULL && (cb->ccb_flags & CCB_SENSE) != 0)
3228 return 0;
3229 #endif /* SCSI_LOW_NEGOTIATE_BEFORE_SENSE */
3230
3231 device_printf(slp->sl_dev,
3232 "(%d:*): <%s> offset %d period %dns ",
3233 ti->ti_id, s, offset, period * 4);
3234
3235 if (period != 0)
3236 {
3237 speed = 1000 * 10 / (period * 4);
3238 printf("%d.%d M/s", speed / 10, speed % 10);
3239 }
3240 printf("\n");
3241 }
3242 return 0;
3243 }
3244
3245 static int
scsi_low_wide(slp)3246 scsi_low_wide(slp)
3247 struct scsi_low_softc *slp;
3248 {
3249 struct targ_info *ti = slp->sl_Tnexus;
3250 int error;
3251
3252 ti->ti_width = MSGIN_WIDTHP(ti);
3253 error = (*slp->sl_funcs->scsi_low_msg) (slp, ti, SCSI_LOW_MSG_WIDE);
3254 if (error != 0)
3255 {
3256 /* XXX:
3257 * Current width is not acceptable for our adapter.
3258 * The adapter changes max width.
3259 */
3260 device_printf(slp->sl_dev,
3261 "wide neg failed. retry wide msg neg ...\n");
3262 return error;
3263 }
3264
3265 ti->ti_owidth = ti->ti_width;
3266 if (ti->ti_width > SCSI_LOW_BUS_WIDTH_8)
3267 {
3268 ti->ti_setup_msg_done |=
3269 (SCSI_LOW_MSG_SYNCH | SCSI_LOW_MSG_WIDE);
3270 }
3271
3272 /* inform data */
3273 if ((slp->sl_show_result & SHOW_WIDE_NEG) != 0)
3274 {
3275 #ifdef SCSI_LOW_NEGOTIATE_BEFORE_SENSE
3276 struct slccb *cb = slp->sl_Qnexus;
3277
3278 if (cb != NULL && (cb->ccb_flags & CCB_SENSE) != 0)
3279 return 0;
3280 #endif /* SCSI_LOW_NEGOTIATE_BEFORE_SENSE */
3281
3282 device_printf(slp->sl_dev, "(%d:*): transfer width %d bits\n",
3283 ti->ti_id, 1 << (3 + ti->ti_width));
3284 }
3285 return 0;
3286 }
3287
3288 static int
scsi_low_msginfunc_simple_qtag(slp)3289 scsi_low_msginfunc_simple_qtag(slp)
3290 struct scsi_low_softc *slp;
3291 {
3292 struct targ_info *ti = slp->sl_Tnexus;
3293 scsi_low_tag_t etag = (scsi_low_tag_t) ti->ti_msgin[1];
3294
3295 if (slp->sl_Qnexus != NULL)
3296 {
3297 if (slp->sl_Qnexus->ccb_tag != etag)
3298 {
3299 slp->sl_error |= FATALIO;
3300 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
3301 SCSI_LOW_INFO(slp, ti, "MSGIN: qtag mismatch");
3302 }
3303 }
3304 else if (scsi_low_establish_ccb(ti, slp->sl_Lnexus, etag) == NULL)
3305 {
3306 #ifdef SCSI_LOW_DEBUG
3307 if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_NEXUS_CHECK, ti->ti_id))
3308 return 0;
3309 #endif /* SCSI_LOW_DEBUG */
3310
3311 slp->sl_error |= FATALIO;
3312 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT_QTAG, 0);
3313 SCSI_LOW_INFO(slp, ti, "MSGIN: taged ccb not found");
3314 }
3315 return 0;
3316 }
3317
3318 static int
scsi_low_msginfunc_i_wide_residue(slp)3319 scsi_low_msginfunc_i_wide_residue(slp)
3320 struct scsi_low_softc *slp;
3321 {
3322 struct targ_info *ti = slp->sl_Tnexus;
3323 struct slccb *cb = slp->sl_Qnexus;
3324 int res = (int) ti->ti_msgin[1];
3325
3326 if (cb == NULL || res <= 0 ||
3327 (ti->ti_width == SCSI_LOW_BUS_WIDTH_16 && res > 1) ||
3328 (ti->ti_width == SCSI_LOW_BUS_WIDTH_32 && res > 3))
3329 return EINVAL;
3330
3331 if (slp->sl_scp.scp_datalen + res > cb->ccb_scp.scp_datalen)
3332 return EINVAL;
3333
3334 slp->sl_scp.scp_datalen += res;
3335 slp->sl_scp.scp_data -= res;
3336 scsi_low_data_finish(slp);
3337 return 0;
3338 }
3339
3340 static int
scsi_low_msginfunc_ext(slp)3341 scsi_low_msginfunc_ext(slp)
3342 struct scsi_low_softc *slp;
3343 {
3344 struct slccb *cb = slp->sl_Qnexus;
3345 struct lun_info *li = slp->sl_Lnexus;
3346 struct targ_info *ti = slp->sl_Tnexus;
3347 int count, retry;
3348 u_int32_t *ptr;
3349
3350 if (ti->ti_msginptr == 2)
3351 {
3352 ti->ti_msginlen = ti->ti_msgin[1] + 2;
3353 return 0;
3354 }
3355
3356 switch (MKMSG_EXTEND(ti->ti_msgin[1], ti->ti_msgin[2]))
3357 {
3358 case MKMSG_EXTEND(MSG_EXTEND_MDPLEN, MSG_EXTEND_MDPCODE):
3359 if (cb == NULL)
3360 break;
3361
3362 ptr = (u_int32_t *)(&ti->ti_msgin[3]);
3363 count = (int) htonl((long) (*ptr));
3364 if(slp->sl_scp.scp_datalen - count < 0 ||
3365 slp->sl_scp.scp_datalen - count > cb->ccb_scp.scp_datalen)
3366 break;
3367
3368 slp->sl_scp.scp_datalen -= count;
3369 slp->sl_scp.scp_data += count;
3370 return 0;
3371
3372 case MKMSG_EXTEND(MSG_EXTEND_SYNCHLEN, MSG_EXTEND_SYNCHCODE):
3373 if (li == NULL)
3374 break;
3375
3376 retry = scsi_low_synch(slp);
3377 if (retry != 0 || (ti->ti_emsgflags & SCSI_LOW_MSG_SYNCH) == 0)
3378 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_SYNCH, 0);
3379
3380 #ifdef SCSI_LOW_DEBUG
3381 if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_ATTEN_CHECK, ti->ti_id))
3382 {
3383 scsi_low_test_atten(slp, ti, SCSI_LOW_MSG_SYNCH);
3384 }
3385 #endif /* SCSI_LOW_DEBUG */
3386 return 0;
3387
3388 case MKMSG_EXTEND(MSG_EXTEND_WIDELEN, MSG_EXTEND_WIDECODE):
3389 if (li == NULL)
3390 break;
3391
3392 retry = scsi_low_wide(slp);
3393 if (retry != 0 || (ti->ti_emsgflags & SCSI_LOW_MSG_WIDE) == 0)
3394 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_WIDE, 0);
3395
3396 return 0;
3397
3398 default:
3399 break;
3400 }
3401
3402 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_REJECT, 0);
3403 return EINVAL;
3404 }
3405
3406 static int
scsi_low_msginfunc_parity(slp)3407 scsi_low_msginfunc_parity(slp)
3408 struct scsi_low_softc *slp;
3409 {
3410 struct targ_info *ti = slp->sl_Tnexus;
3411
3412 /* only I -> T, invalid! */
3413 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_REJECT, 0);
3414 return 0;
3415 }
3416
3417 static int
scsi_low_msginfunc_msg_reject(slp)3418 scsi_low_msginfunc_msg_reject(slp)
3419 struct scsi_low_softc *slp;
3420 {
3421 struct targ_info *ti = slp->sl_Tnexus;
3422 struct scsi_low_msgout_data *mdp;
3423 u_int msgflags;
3424
3425 if (ti->ti_emsgflags != 0)
3426 {
3427 device_printf(slp->sl_dev, "msg flags [0x%x] rejected\n",
3428 ti->ti_emsgflags);
3429 msgflags = SCSI_LOW_MSG_REJECT;
3430 mdp = &scsi_low_msgout_data[0];
3431 for ( ; mdp->md_flags != SCSI_LOW_MSG_ALL; mdp ++)
3432 {
3433 if ((ti->ti_emsgflags & mdp->md_flags) != 0)
3434 {
3435 ti->ti_emsgflags &= ~mdp->md_flags;
3436 if (mdp->md_errfunc != NULL)
3437 (*mdp->md_errfunc) (slp, msgflags);
3438 break;
3439 }
3440 }
3441 return 0;
3442 }
3443 else
3444 {
3445 SCSI_LOW_INFO(slp, ti, "MSGIN: rejected msg not found");
3446 slp->sl_error |= MSGERR;
3447 }
3448 return EINVAL;
3449 }
3450
3451 int
scsi_low_msgin(slp,ti,c)3452 scsi_low_msgin(slp, ti, c)
3453 struct scsi_low_softc *slp;
3454 struct targ_info *ti;
3455 u_int c;
3456 {
3457 struct scsi_low_msgin_data *sdp;
3458 struct lun_info *li;
3459 u_int8_t msg;
3460
3461 #ifdef SCSI_LOW_DIAGNOSTIC
3462 if (ti != slp->sl_Tnexus)
3463 {
3464 scsi_low_print(slp, NULL);
3465 panic("scsi_low_msgin: Target nexus inconsistent");
3466 }
3467 #endif /* SCSI_LOW_DIAGNOSTIC */
3468
3469 /*
3470 * Phase changes, clear the pointer.
3471 */
3472 if (ti->ti_ophase != ti->ti_phase)
3473 {
3474 MSGINPTR_CLR(ti);
3475 ti->ti_msgin_parity_error = 0;
3476
3477 slp->sl_ph_count ++;
3478 if (slp->sl_ph_count > SCSI_LOW_MAX_PHCHANGES)
3479 {
3480 device_printf(slp->sl_dev, "too many phase changes\n");
3481 slp->sl_error |= FATALIO;
3482 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
3483 }
3484 }
3485
3486 /*
3487 * Store a current messages byte into buffer and
3488 * wait for the completion of the current msg.
3489 */
3490 ti->ti_msgin[ti->ti_msginptr ++] = (u_int8_t) c;
3491 if (ti->ti_msginptr >= SCSI_LOW_MAX_MSGLEN)
3492 {
3493 ti->ti_msginptr = SCSI_LOW_MAX_MSGLEN - 1;
3494 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_REJECT, 0);
3495 }
3496
3497 /*
3498 * Check parity errors.
3499 */
3500 if ((c & SCSI_LOW_DATA_PE) != 0)
3501 {
3502 ti->ti_msgin_parity_error ++;
3503 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_PARITY, 0);
3504 goto out;
3505 }
3506
3507 if (ti->ti_msgin_parity_error != 0)
3508 goto out;
3509
3510 /*
3511 * Calculate messages length.
3512 */
3513 msg = ti->ti_msgin[0];
3514 if (msg < MSGIN_DATA_LAST)
3515 sdp = &scsi_low_msgin_data[msg];
3516 else
3517 sdp = &scsi_low_msgin_data[MSGIN_DATA_LAST];
3518
3519 if (ti->ti_msginlen == 0)
3520 {
3521 ti->ti_msginlen = sdp->md_len;
3522 }
3523
3524 /*
3525 * Check comletion.
3526 */
3527 if (ti->ti_msginptr < ti->ti_msginlen)
3528 return EJUSTRETURN;
3529
3530 /*
3531 * Do process.
3532 */
3533 if ((msg & MSG_IDENTIFY) == 0)
3534 {
3535 if (((*sdp->md_msgfunc) (slp)) == EJUSTRETURN)
3536 return EJUSTRETURN;
3537 }
3538 else
3539 {
3540 li = slp->sl_Lnexus;
3541 if (li == NULL)
3542 {
3543 li = scsi_low_alloc_li(ti, MSGCMD_LUN(msg), 0);
3544 if (li == NULL)
3545 goto badlun;
3546 slp->sl_Lnexus = li;
3547 (*slp->sl_funcs->scsi_low_establish_lun_nexus) (slp);
3548 }
3549 else
3550 {
3551 if (MSGCMD_LUN(msg) != li->li_lun)
3552 goto badlun;
3553 }
3554
3555 if (slp->sl_Qnexus == NULL && li->li_nqio == 0)
3556 {
3557 if (!scsi_low_establish_ccb(ti, li, SCSI_LOW_UNKTAG))
3558 {
3559 #ifdef SCSI_LOW_DEBUG
3560 if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_NEXUS_CHECK, ti->ti_id) != 0)
3561 {
3562 goto out;
3563 }
3564 #endif /* SCSI_LOW_DEBUG */
3565 goto badlun;
3566 }
3567 }
3568 }
3569 goto out;
3570
3571 /*
3572 * Msg process completed, reset msgin pointer and assert ATN if desired.
3573 */
3574 badlun:
3575 slp->sl_error |= FATALIO;
3576 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
3577 SCSI_LOW_INFO(slp, ti, "MSGIN: identify wrong");
3578
3579 out:
3580 if (ti->ti_msginptr < ti->ti_msginlen)
3581 return EJUSTRETURN;
3582
3583 #ifdef SCSI_LOW_DIAGNOSTIC
3584 scsi_low_msg_log_write(&ti->ti_log_msgin,
3585 &ti->ti_msgin[0], ti->ti_msginlen);
3586 #endif /* SCSI_LOW_DIAGNOSTIC */
3587
3588 MSGINPTR_CLR(ti);
3589 return 0;
3590 }
3591
3592 /**********************************************************
3593 * disconnect
3594 **********************************************************/
3595 int
scsi_low_disconnected(slp,ti)3596 scsi_low_disconnected(slp, ti)
3597 struct scsi_low_softc *slp;
3598 struct targ_info *ti;
3599 {
3600 struct slccb *cb = slp->sl_Qnexus;
3601
3602 /* check phase completion */
3603 switch (slp->sl_msgphase)
3604 {
3605 case MSGPH_RESET:
3606 scsi_low_statusin(slp, slp->sl_Tnexus, ST_GOOD);
3607 scsi_low_msginfunc_cc(slp);
3608 scsi_low_reset_nexus_target(slp, slp->sl_Tnexus, 0);
3609 goto io_resume;
3610
3611 case MSGPH_ABORT:
3612 scsi_low_statusin(slp, slp->sl_Tnexus, ST_GOOD);
3613 scsi_low_msginfunc_cc(slp);
3614 scsi_low_reset_nexus_lun(slp, slp->sl_Lnexus, 0);
3615 goto io_resume;
3616
3617 case MSGPH_TERM:
3618 scsi_low_statusin(slp, slp->sl_Tnexus, ST_GOOD);
3619 scsi_low_msginfunc_cc(slp);
3620 goto io_resume;
3621
3622 case MSGPH_DISC:
3623 if (cb != NULL)
3624 {
3625 struct lun_info *li;
3626
3627 li = cb->li;
3628 TAILQ_INSERT_TAIL(&li->li_discq, cb, ccb_chain);
3629 cb->ccb_flags |= CCB_DISCQ;
3630 cb->ccb_error |= slp->sl_error;
3631 li->li_disc ++;
3632 ti->ti_disc ++;
3633 slp->sl_disc ++;
3634 }
3635
3636 #ifdef SCSI_LOW_STATICS
3637 scsi_low_statics.nexus_disconnected ++;
3638 #endif /* SCSI_LOW_STATICS */
3639
3640 #ifdef SCSI_LOW_DEBUG
3641 if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_DISC, ti->ti_id) != 0)
3642 {
3643 printf("## SCSI_LOW_DISCONNECTED ===============\n");
3644 scsi_low_print(slp, NULL);
3645 }
3646 #endif /* SCSI_LOW_DEBUG */
3647 break;
3648
3649 case MSGPH_NULL:
3650 slp->sl_error |= FATALIO;
3651 if (ti->ti_phase == PH_SELSTART)
3652 slp->sl_error |= SELTIMEOUTIO;
3653 else
3654 slp->sl_error |= UBFERR;
3655 /* fall through */
3656
3657 case MSGPH_LCTERM:
3658 case MSGPH_CMDC:
3659 io_resume:
3660 if (cb == NULL)
3661 break;
3662
3663 #ifdef SCSI_LOW_DEBUG
3664 if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_ATTEN_CHECK, ti->ti_id))
3665 {
3666 if (cb->ccb_omsgoutflag == SCSI_LOW_MSG_NOOP &&
3667 (cb->ccb_msgoutflag != 0 ||
3668 (ti->ti_msgflags & SCSI_LOW_MSG_NOOP)))
3669 {
3670 scsi_low_info(slp, ti, "ATTEN CHECK FAILED");
3671 }
3672 }
3673 #endif /* SCSI_LOW_DEBUG */
3674
3675 cb->ccb_error |= slp->sl_error;
3676 if (scsi_low_done(slp, cb) == SCSI_LOW_DONE_RETRY)
3677 {
3678 cb->ccb_flags |= CCB_STARTQ;
3679 TAILQ_INSERT_HEAD(&slp->sl_start, cb, ccb_chain);
3680 }
3681 break;
3682 }
3683
3684 scsi_low_bus_release(slp, ti);
3685 scsi_low_start(slp);
3686 return 1;
3687 }
3688
3689 /**********************************************************
3690 * TAG operations
3691 **********************************************************/
3692 static int
scsi_low_alloc_qtag(cb)3693 scsi_low_alloc_qtag(cb)
3694 struct slccb *cb;
3695 {
3696 struct lun_info *li = cb->li;
3697 scsi_low_tag_t etag;
3698
3699 if (cb->ccb_otag != SCSI_LOW_UNKTAG)
3700 return 0;
3701
3702 #ifndef SCSI_LOW_ALT_QTAG_ALLOCATE
3703 etag = ffs(li->li_qtagbits);
3704 if (etag == 0)
3705 return ENOSPC;
3706
3707 li->li_qtagbits &= ~(1 << (etag - 1));
3708 cb->ccb_otag = etag;
3709 return 0;
3710
3711 #else /* SCSI_LOW_ALT_QTAG_ALLOCATE */
3712 for (etag = li->li_qd ; li->li_qd < SCSI_LOW_MAXNEXUS; li->li_qd ++)
3713 if (li->li_qtagarray[li->li_qd] == 0)
3714 goto found;
3715
3716 for (li->li_qd = 0; li->li_qd < etag; li->li_qd ++)
3717 if (li->li_qtagarray[li->li_qd] == 0)
3718 goto found;
3719
3720 return ENOSPC;
3721
3722 found:
3723 li->li_qtagarray[li->li_qd] ++;
3724 cb->ccb_otag = (li->li_qd ++);
3725 return 0;
3726 #endif /* SCSI_LOW_ALT_QTAG_ALLOCATE */
3727 }
3728
3729 static int
scsi_low_dealloc_qtag(cb)3730 scsi_low_dealloc_qtag(cb)
3731 struct slccb *cb;
3732 {
3733 struct lun_info *li = cb->li;
3734 scsi_low_tag_t etag;
3735
3736 if (cb->ccb_otag == SCSI_LOW_UNKTAG)
3737 return 0;
3738
3739 #ifndef SCSI_LOW_ALT_QTAG_ALLOCATE
3740 etag = cb->ccb_otag - 1;
3741 #ifdef SCSI_LOW_DIAGNOSTIC
3742 if (etag >= sizeof(li->li_qtagbits) * NBBY)
3743 panic("scsi_low_dealloc_tag: illegal tag");
3744 #endif /* SCSI_LOW_DIAGNOSTIC */
3745 li->li_qtagbits |= (1 << etag);
3746
3747 #else /* SCSI_LOW_ALT_QTAG_ALLOCATE */
3748 etag = cb->ccb_otag;
3749 #ifdef SCSI_LOW_DIAGNOSTIC
3750 if (etag >= SCSI_LOW_MAXNEXUS)
3751 panic("scsi_low_dealloc_tag: illegal tag");
3752 #endif /* SCSI_LOW_DIAGNOSTIC */
3753 li->li_qtagarray[etag] --;
3754 #endif /* SCSI_LOW_ALT_QTAG_ALLOCATE */
3755
3756 cb->ccb_otag = SCSI_LOW_UNKTAG;
3757 return 0;
3758 }
3759
3760 static struct slccb *
scsi_low_revoke_ccb(slp,cb,fdone)3761 scsi_low_revoke_ccb(slp, cb, fdone)
3762 struct scsi_low_softc *slp;
3763 struct slccb *cb;
3764 int fdone;
3765 {
3766 struct targ_info *ti = cb->ti;
3767 struct lun_info *li = cb->li;
3768
3769 #ifdef SCSI_LOW_DIAGNOSTIC
3770 if ((cb->ccb_flags & (CCB_STARTQ | CCB_DISCQ)) ==
3771 (CCB_STARTQ | CCB_DISCQ))
3772 {
3773 panic("%s: ccb in both queue",
3774 device_get_nameunit(slp->sl_dev));
3775 }
3776 #endif /* SCSI_LOW_DIAGNOSTIC */
3777
3778 if ((cb->ccb_flags & CCB_STARTQ) != 0)
3779 {
3780 TAILQ_REMOVE(&slp->sl_start, cb, ccb_chain);
3781 }
3782
3783 if ((cb->ccb_flags & CCB_DISCQ) != 0)
3784 {
3785 TAILQ_REMOVE(&li->li_discq, cb, ccb_chain);
3786 li->li_disc --;
3787 ti->ti_disc --;
3788 slp->sl_disc --;
3789 }
3790
3791 cb->ccb_flags &= ~(CCB_STARTQ | CCB_DISCQ |
3792 CCB_SENSE | CCB_CLEARQ | CCB_INTERNAL);
3793
3794 if (fdone != 0 &&
3795 (cb->ccb_rcnt ++ >= slp->sl_max_retry ||
3796 (cb->ccb_flags & CCB_NORETRY) != 0))
3797 {
3798 cb->ccb_error |= FATALIO;
3799 cb->ccb_flags &= ~CCB_AUTOSENSE;
3800 if (scsi_low_done(slp, cb) != SCSI_LOW_DONE_COMPLETE)
3801 panic("%s: done ccb retried",
3802 device_get_nameunit(slp->sl_dev));
3803 return NULL;
3804 }
3805 else
3806 {
3807 cb->ccb_error |= PENDINGIO;
3808 scsi_low_deactivate_qtag(cb);
3809 scsi_low_ccb_message_retry(cb);
3810 cb->ccb_tc = cb->ccb_tcmax = SCSI_LOW_MIN_TOUT;
3811 return cb;
3812 }
3813 }
3814
3815 static void
scsi_low_reset_nexus_lun(slp,li,fdone)3816 scsi_low_reset_nexus_lun(slp, li, fdone)
3817 struct scsi_low_softc *slp;
3818 struct lun_info *li;
3819 int fdone;
3820 {
3821 struct slccb *cb, *ncb, *ecb;
3822
3823 if (li == NULL)
3824 return;
3825
3826 ecb = NULL;
3827 for (cb = TAILQ_FIRST(&li->li_discq); cb != NULL; cb = ncb)
3828 {
3829 ncb = TAILQ_NEXT(cb, ccb_chain);
3830 cb = scsi_low_revoke_ccb(slp, cb, fdone);
3831 if (cb != NULL)
3832 {
3833 /*
3834 * presumely keep ordering of io
3835 */
3836 cb->ccb_flags |= CCB_STARTQ;
3837 if (ecb == NULL)
3838 {
3839 TAILQ_INSERT_HEAD(&slp->sl_start,\
3840 cb, ccb_chain);
3841 }
3842 else
3843 {
3844 TAILQ_INSERT_AFTER(&slp->sl_start,\
3845 ecb, cb, ccb_chain);
3846 }
3847 ecb = cb;
3848 }
3849 }
3850 }
3851
3852 /**************************************************************
3853 * Qurik setup
3854 **************************************************************/
3855 static void
scsi_low_calcf_lun(li)3856 scsi_low_calcf_lun(li)
3857 struct lun_info *li;
3858 {
3859 struct targ_info *ti = li->li_ti;
3860 struct scsi_low_softc *slp = ti->ti_sc;
3861 u_int cfgflags, diskflags;
3862
3863 if (li->li_flags_valid == SCSI_LOW_LUN_FLAGS_ALL_VALID)
3864 cfgflags = li->li_cfgflags;
3865 else
3866 cfgflags = 0;
3867
3868 diskflags = li->li_diskflags & li->li_quirks;
3869
3870 /* disconnect */
3871 li->li_flags &= ~SCSI_LOW_DISC;
3872 if ((slp->sl_cfgflags & CFG_NODISC) == 0 &&
3873 (diskflags & SCSI_LOW_DISK_DISC) != 0 &&
3874 (cfgflags & SCSI_LOW_DISC) != 0)
3875 li->li_flags |= SCSI_LOW_DISC;
3876
3877 /* parity */
3878 li->li_flags |= SCSI_LOW_NOPARITY;
3879 if ((slp->sl_cfgflags & CFG_NOPARITY) == 0 &&
3880 (diskflags & SCSI_LOW_DISK_PARITY) != 0 &&
3881 (cfgflags & SCSI_LOW_NOPARITY) == 0)
3882 li->li_flags &= ~SCSI_LOW_NOPARITY;
3883
3884 /* qtag */
3885 if ((slp->sl_cfgflags & CFG_NOQTAG) == 0 &&
3886 (cfgflags & SCSI_LOW_QTAG) != 0 &&
3887 (diskflags & SCSI_LOW_DISK_QTAG) != 0)
3888 {
3889 li->li_flags |= SCSI_LOW_QTAG;
3890 li->li_maxnexus = SCSI_LOW_MAXNEXUS;
3891 li->li_maxnqio = li->li_maxnexus;
3892 }
3893 else
3894 {
3895 li->li_flags &= ~SCSI_LOW_QTAG;
3896 li->li_maxnexus = 0;
3897 li->li_maxnqio = li->li_maxnexus;
3898 }
3899
3900 /* cmd link */
3901 li->li_flags &= ~SCSI_LOW_LINK;
3902 if ((cfgflags & SCSI_LOW_LINK) != 0 &&
3903 (diskflags & SCSI_LOW_DISK_LINK) != 0)
3904 li->li_flags |= SCSI_LOW_LINK;
3905
3906 /* compatible flags */
3907 li->li_flags &= ~SCSI_LOW_SYNC;
3908 if (ti->ti_maxsynch.offset > 0)
3909 li->li_flags |= SCSI_LOW_SYNC;
3910
3911 #ifdef SCSI_LOW_DEBUG
3912 if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_CALCF, ti->ti_id) != 0)
3913 {
3914 scsi_low_calcf_show(li);
3915 }
3916 #endif /* SCSI_LOW_DEBUG */
3917 }
3918
3919 static void
scsi_low_calcf_target(ti)3920 scsi_low_calcf_target(ti)
3921 struct targ_info *ti;
3922 {
3923 struct scsi_low_softc *slp = ti->ti_sc;
3924 u_int offset, period, diskflags;
3925
3926 diskflags = ti->ti_diskflags & ti->ti_quirks;
3927
3928 /* synch */
3929 if ((slp->sl_cfgflags & CFG_ASYNC) == 0 &&
3930 (diskflags & SCSI_LOW_DISK_SYNC) != 0)
3931 {
3932 offset = ti->ti_maxsynch.offset;
3933 period = ti->ti_maxsynch.period;
3934 if (offset == 0 || period == 0)
3935 offset = period = 0;
3936 }
3937 else
3938 {
3939 offset = period = 0;
3940 }
3941
3942 ti->ti_maxsynch.offset = offset;
3943 ti->ti_maxsynch.period = period;
3944
3945 /* wide */
3946 if ((diskflags & SCSI_LOW_DISK_WIDE_32) == 0 &&
3947 ti->ti_width > SCSI_LOW_BUS_WIDTH_16)
3948 ti->ti_width = SCSI_LOW_BUS_WIDTH_16;
3949
3950 if ((diskflags & SCSI_LOW_DISK_WIDE_16) == 0 &&
3951 ti->ti_width > SCSI_LOW_BUS_WIDTH_8)
3952 ti->ti_width = SCSI_LOW_BUS_WIDTH_8;
3953
3954 if (ti->ti_flags_valid == SCSI_LOW_TARG_FLAGS_ALL_VALID)
3955 {
3956 if (ti->ti_maxsynch.offset != ti->ti_osynch.offset ||
3957 ti->ti_maxsynch.period != ti->ti_osynch.period)
3958 ti->ti_setup_msg |= SCSI_LOW_MSG_SYNCH;
3959 if (ti->ti_width != ti->ti_owidth)
3960 ti->ti_setup_msg |= (SCSI_LOW_MSG_WIDE | SCSI_LOW_MSG_SYNCH);
3961
3962 ti->ti_osynch = ti->ti_maxsynch;
3963 ti->ti_owidth = ti->ti_width;
3964 }
3965
3966 #ifdef SCSI_LOW_DEBUG
3967 if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_CALCF, ti->ti_id) != 0)
3968 {
3969 device_printf(slp->sl_dev,
3970 "(%d:*): max period(%dns) offset(%d) width(%d)\n",
3971 ti->ti_id,
3972 ti->ti_maxsynch.period * 4,
3973 ti->ti_maxsynch.offset,
3974 ti->ti_width);
3975 }
3976 #endif /* SCSI_LOW_DEBUG */
3977 }
3978
3979 static void
scsi_low_calcf_show(li)3980 scsi_low_calcf_show(li)
3981 struct lun_info *li;
3982 {
3983 struct targ_info *ti = li->li_ti;
3984 struct scsi_low_softc *slp = ti->ti_sc;
3985
3986 device_printf(slp->sl_dev,
3987 "(%d:%d): period(%d ns) offset(%d) width(%d) flags 0x%b\n",
3988 ti->ti_id, li->li_lun,
3989 ti->ti_maxsynch.period * 4,
3990 ti->ti_maxsynch.offset,
3991 ti->ti_width,
3992 li->li_flags, SCSI_LOW_BITS);
3993 }
3994
3995 #ifdef SCSI_LOW_START_UP_CHECK
3996 /**************************************************************
3997 * scsi world start up
3998 **************************************************************/
3999 static int scsi_low_poll(struct scsi_low_softc *, struct slccb *);
4000
4001 static int
scsi_low_start_up(slp)4002 scsi_low_start_up(slp)
4003 struct scsi_low_softc *slp;
4004 {
4005 struct targ_info *ti;
4006 struct lun_info *li;
4007 struct slccb *cb;
4008 int target, lun;
4009
4010 device_printf(slp->sl_dev, "scsi_low: probing all devices ....\n");
4011
4012 for (target = 0; target < slp->sl_ntargs; target ++)
4013 {
4014 if (target == slp->sl_hostid)
4015 {
4016 if ((slp->sl_show_result & SHOW_PROBE_RES) != 0)
4017 {
4018 device_printf(slp->sl_dev,
4019 "scsi_low: target %d (host card)\n",
4020 target);
4021 }
4022 continue;
4023 }
4024
4025 if ((slp->sl_show_result & SHOW_PROBE_RES) != 0)
4026 {
4027 device_printf(slp->sl_dev, "scsi_low: target %d lun ",
4028 target);
4029 }
4030
4031 ti = slp->sl_ti[target];
4032 for (lun = 0; lun < slp->sl_nluns; lun ++)
4033 {
4034 if ((cb = SCSI_LOW_ALLOC_CCB(1)) == NULL)
4035 break;
4036
4037 cb->osdep = NULL;
4038 cb->bp = NULL;
4039
4040 li = scsi_low_alloc_li(ti, lun, 1);
4041
4042 scsi_low_enqueue(slp, ti, li, cb,
4043 CCB_AUTOSENSE | CCB_POLLED, 0);
4044
4045 scsi_low_poll(slp, cb);
4046
4047 if (li->li_state != SCSI_LOW_LUN_OK)
4048 break;
4049
4050 if ((slp->sl_show_result & SHOW_PROBE_RES) != 0)
4051 {
4052 printf("%d ", lun);
4053 }
4054 }
4055
4056 if ((slp->sl_show_result & SHOW_PROBE_RES) != 0)
4057 {
4058 printf("\n");
4059 }
4060 }
4061 return 0;
4062 }
4063
4064 static int
scsi_low_poll(slp,cb)4065 scsi_low_poll(slp, cb)
4066 struct scsi_low_softc *slp;
4067 struct slccb *cb;
4068 {
4069 int tcount;
4070
4071 tcount = 0;
4072 while (slp->sl_nio > 0)
4073 {
4074 DELAY((1000 * 1000) / SCSI_LOW_POLL_HZ);
4075
4076 (*slp->sl_funcs->scsi_low_poll) (slp);
4077 if (tcount ++ < SCSI_LOW_POLL_HZ / SCSI_LOW_TIMEOUT_HZ)
4078 continue;
4079
4080 tcount = 0;
4081 scsi_low_timeout_check(slp);
4082 }
4083
4084 return 0;
4085 }
4086 #endif /* SCSI_LOW_START_UP_CHECK */
4087
4088 /**********************************************************
4089 * DEBUG SECTION
4090 **********************************************************/
4091 #ifdef SCSI_LOW_DEBUG
4092 static void
scsi_low_test_abort(slp,ti,li)4093 scsi_low_test_abort(slp, ti, li)
4094 struct scsi_low_softc *slp;
4095 struct targ_info *ti;
4096 struct lun_info *li;
4097 {
4098 struct slccb *acb;
4099
4100 if (li->li_disc > 1)
4101 {
4102 acb = TAILQ_FIRST(&li->li_discq);
4103 if (scsi_low_abort_ccb(slp, acb) == 0)
4104 {
4105 device_printf(slp->sl_dev,
4106 "aborting ccb(0x%lx) start\n", (u_long) acb);
4107 }
4108 }
4109 }
4110
4111 static void
scsi_low_test_atten(slp,ti,msg)4112 scsi_low_test_atten(slp, ti, msg)
4113 struct scsi_low_softc *slp;
4114 struct targ_info *ti;
4115 u_int msg;
4116 {
4117
4118 if (slp->sl_ph_count < SCSI_LOW_MAX_ATTEN_CHECK)
4119 scsi_low_assert_msg(slp, ti, msg, 0);
4120 else
4121 device_printf(slp->sl_dev, "atten check OK\n");
4122 }
4123
4124 static void
scsi_low_test_cmdlnk(slp,cb)4125 scsi_low_test_cmdlnk(slp, cb)
4126 struct scsi_low_softc *slp;
4127 struct slccb *cb;
4128 {
4129 #define SCSI_LOW_CMDLNK_NOK (CCB_INTERNAL | CCB_SENSE | CCB_CLEARQ)
4130
4131 if ((cb->ccb_flags & SCSI_LOW_CMDLNK_NOK) != 0)
4132 return;
4133
4134 memcpy(cb->ccb_scsi_cmd, slp->sl_scp.scp_cmd,
4135 slp->sl_scp.scp_cmdlen);
4136 cb->ccb_scsi_cmd[slp->sl_scp.scp_cmdlen - 1] |= 1;
4137 slp->sl_scp.scp_cmd = cb->ccb_scsi_cmd;
4138 }
4139 #endif /* SCSI_LOW_DEBUG */
4140
4141 /* static */ void
scsi_low_info(slp,ti,s)4142 scsi_low_info(slp, ti, s)
4143 struct scsi_low_softc *slp;
4144 struct targ_info *ti;
4145 u_char *s;
4146 {
4147
4148 if (slp == NULL)
4149 slp = LIST_FIRST(&sl_tab);
4150 if (s == NULL)
4151 s = "no message";
4152
4153 printf(">>>>> SCSI_LOW_INFO(0x%lx): %s\n", (u_long) slp->sl_Tnexus, s);
4154 if (ti == NULL)
4155 {
4156 TAILQ_FOREACH(ti, &slp->sl_titab, ti_chain)
4157 {
4158 scsi_low_print(slp, ti);
4159 }
4160 }
4161 else
4162 {
4163 scsi_low_print(slp, ti);
4164 }
4165 }
4166
4167 static u_char *phase[] =
4168 {
4169 "FREE", "ARBSTART", "SELSTART", "SELECTED",
4170 "CMDOUT", "DATA", "MSGIN", "MSGOUT", "STATIN", "DISC", "RESEL"
4171 };
4172
4173 void
scsi_low_print(slp,ti)4174 scsi_low_print(slp, ti)
4175 struct scsi_low_softc *slp;
4176 struct targ_info *ti;
4177 {
4178 struct lun_info *li;
4179 struct slccb *cb;
4180 struct sc_p *sp;
4181
4182 if (ti == NULL || ti == slp->sl_Tnexus)
4183 {
4184 ti = slp->sl_Tnexus;
4185 li = slp->sl_Lnexus;
4186 cb = slp->sl_Qnexus;
4187 }
4188 else
4189 {
4190 li = LIST_FIRST(&ti->ti_litab);
4191 cb = TAILQ_FIRST(&li->li_discq);
4192 }
4193 sp = &slp->sl_scp;
4194
4195 device_printf(slp->sl_dev,
4196 "=== NEXUS T(0x%lx) L(0x%lx) Q(0x%lx) NIO(%d) ===\n",
4197 (u_long) ti, (u_long) li, (u_long) cb, slp->sl_nio);
4198
4199 /* target stat */
4200 if (ti != NULL)
4201 {
4202 u_int flags = 0, maxnqio = 0, nqio = 0;
4203 int lun = CAM_LUN_WILDCARD;
4204
4205 if (li != NULL)
4206 {
4207 lun = li->li_lun;
4208 flags = li->li_flags;
4209 maxnqio = li->li_maxnqio;
4210 nqio = li->li_nqio;
4211 }
4212
4213 device_printf(slp->sl_dev,
4214 "(%d:%d) ph<%s> => ph<%s> DISC(%d) QIO(%d:%d)\n",
4215 ti->ti_id, lun, phase[(int) ti->ti_ophase],
4216 phase[(int) ti->ti_phase], ti->ti_disc,
4217 nqio, maxnqio);
4218
4219 if (cb != NULL)
4220 {
4221 printf("CCB: cmd[0] 0x%x clen 0x%x dlen 0x%x<0x%x stat 0x%x err %b\n",
4222 (u_int) cb->ccb_scp.scp_cmd[0],
4223 cb->ccb_scp.scp_cmdlen,
4224 cb->ccb_datalen,
4225 cb->ccb_scp.scp_datalen,
4226 (u_int) cb->ccb_sscp.scp_status,
4227 cb->ccb_error, SCSI_LOW_ERRORBITS);
4228 }
4229
4230 printf("MSGIN: ptr(%x) [%x][%x][%x][%x][%x] attention: %d\n",
4231 (u_int) (ti->ti_msginptr),
4232 (u_int) (ti->ti_msgin[0]),
4233 (u_int) (ti->ti_msgin[1]),
4234 (u_int) (ti->ti_msgin[2]),
4235 (u_int) (ti->ti_msgin[3]),
4236 (u_int) (ti->ti_msgin[4]),
4237 slp->sl_atten);
4238
4239 printf("MSGOUT: msgflags 0x%x [%x][%x][%x][%x][%x] msgoutlen %d C_FLAGS: %b\n",
4240 (u_int) ti->ti_msgflags,
4241 (u_int) (ti->ti_msgoutstr[0]),
4242 (u_int) (ti->ti_msgoutstr[1]),
4243 (u_int) (ti->ti_msgoutstr[2]),
4244 (u_int) (ti->ti_msgoutstr[3]),
4245 (u_int) (ti->ti_msgoutstr[4]),
4246 ti->ti_msgoutlen,
4247 flags, SCSI_LOW_BITS);
4248
4249 #ifdef SCSI_LOW_DIAGNOSTIC
4250 scsi_low_msg_log_show(&ti->ti_log_msgin, "MIN LOG ", 2);
4251 scsi_low_msg_log_show(&ti->ti_log_msgout, "MOUT LOG", 2);
4252 #endif /* SCSI_LOW_DIAGNOSTIC */
4253
4254 }
4255
4256 printf("SCB: daddr 0x%lx dlen 0x%x stat 0x%x err %b\n",
4257 (u_long) sp->scp_data,
4258 sp->scp_datalen,
4259 (u_int) sp->scp_status,
4260 slp->sl_error, SCSI_LOW_ERRORBITS);
4261 }
4262