1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 * Copyright (c) 2011 Bayard G. Bell. All rights reserved.
25 */
26
27
28 /*
29 * SCSA HBA nexus driver that emulates an HBA connected to SCSI target
30 * devices (large disks).
31 */
32
33 #ifdef DEBUG
34 #define EMUL64DEBUG
35 #endif
36
37 #include <sys/scsi/scsi.h>
38 #include <sys/ddi.h>
39 #include <sys/sunddi.h>
40 #include <sys/taskq.h>
41 #include <sys/disp.h>
42 #include <sys/types.h>
43 #include <sys/buf.h>
44 #include <sys/cpuvar.h>
45 #include <sys/dklabel.h>
46
47 #include <sys/emul64.h>
48 #include <sys/emul64cmd.h>
49 #include <sys/emul64var.h>
50
51 int emul64_usetaskq = 1; /* set to zero for debugging */
52 int emul64debug = 0;
53 #ifdef EMUL64DEBUG
54 static int emul64_cdb_debug = 0;
55 #include <sys/debug.h>
56 #endif
57
58 /*
59 * cb_ops function prototypes
60 */
61 static int emul64_ioctl(dev_t, int, intptr_t, int, cred_t *, int *);
62
63 /*
64 * dev_ops functions prototypes
65 */
66 static int emul64_info(dev_info_t *dip, ddi_info_cmd_t infocmd,
67 void *arg, void **result);
68 static int emul64_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
69 static int emul64_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
70
71 /*
72 * Function prototypes
73 *
74 * SCSA functions exported by means of the transport table
75 */
76 static int emul64_tran_tgt_init(dev_info_t *hba_dip, dev_info_t *tgt_dip,
77 scsi_hba_tran_t *tran, struct scsi_device *sd);
78 static int emul64_scsi_start(struct scsi_address *ap, struct scsi_pkt *pkt);
79 static void emul64_pkt_comp(void *);
80 static int emul64_scsi_abort(struct scsi_address *ap, struct scsi_pkt *pkt);
81 static int emul64_scsi_reset(struct scsi_address *ap, int level);
82 static int emul64_scsi_getcap(struct scsi_address *ap, char *cap, int whom);
83 static int emul64_scsi_setcap(struct scsi_address *ap, char *cap, int value,
84 int whom);
85 static struct scsi_pkt *emul64_scsi_init_pkt(struct scsi_address *ap,
86 struct scsi_pkt *pkt, struct buf *bp, int cmdlen, int statuslen,
87 int tgtlen, int flags, int (*callback)(), caddr_t arg);
88 static void emul64_scsi_destroy_pkt(struct scsi_address *ap,
89 struct scsi_pkt *pkt);
90 static void emul64_scsi_dmafree(struct scsi_address *ap, struct scsi_pkt *pkt);
91 static void emul64_scsi_sync_pkt(struct scsi_address *ap, struct scsi_pkt *pkt);
92 static int emul64_scsi_reset_notify(struct scsi_address *ap, int flag,
93 void (*callback)(caddr_t), caddr_t arg);
94
95 /*
96 * internal functions
97 */
98 static void emul64_i_initcap(struct emul64 *emul64);
99
100 static void emul64_i_log(struct emul64 *emul64, int level, char *fmt, ...);
101 static int emul64_get_tgtrange(struct emul64 *, intptr_t, emul64_tgt_t **,
102 emul64_tgt_range_t *);
103 static int emul64_write_off(struct emul64 *, emul64_tgt_t *,
104 emul64_tgt_range_t *);
105 static int emul64_write_on(struct emul64 *, emul64_tgt_t *,
106 emul64_tgt_range_t *);
107 static emul64_nowrite_t *emul64_nowrite_alloc(emul64_range_t *);
108 static void emul64_nowrite_free(emul64_nowrite_t *);
109 static emul64_nowrite_t *emul64_find_nowrite(emul64_tgt_t *,
110 diskaddr_t start_block, size_t blkcnt, emul64_rng_overlap_t *overlapp,
111 emul64_nowrite_t ***prevp);
112
113 extern emul64_tgt_t *find_tgt(struct emul64 *, ushort_t, ushort_t);
114
115 #ifdef EMUL64DEBUG
116 static void emul64_debug_dump_cdb(struct scsi_address *ap,
117 struct scsi_pkt *pkt);
118 #endif
119
120
121 #ifdef _DDICT
122 static int ddi_in_panic(void);
ddi_in_panic()123 static int ddi_in_panic() { return (0); }
124 #ifndef SCSI_CAP_RESET_NOTIFICATION
125 #define SCSI_CAP_RESET_NOTIFICATION 14
126 #endif
127 #ifndef SCSI_RESET_NOTIFY
128 #define SCSI_RESET_NOTIFY 0x01
129 #endif
130 #ifndef SCSI_RESET_CANCEL
131 #define SCSI_RESET_CANCEL 0x02
132 #endif
133 #endif
134
135 /*
136 * Tunables:
137 *
138 * emul64_max_task
139 * The taskq facility is used to queue up SCSI start requests on a per
140 * controller basis. If the maximum number of queued tasks is hit,
141 * taskq_ent_alloc() delays for a second, which adversely impacts our
142 * performance. This value establishes the maximum number of task
143 * queue entries when taskq_create is called.
144 *
145 * emul64_task_nthreads
146 * Specifies the number of threads that should be used to process a
147 * controller's task queue. Our init function sets this to the number
148 * of CPUs on the system, but this can be overridden in emul64.conf.
149 */
150 int emul64_max_task = 16;
151 int emul64_task_nthreads = 1;
152
153 /*
154 * Local static data
155 */
156 static void *emul64_state = NULL;
157
158 /*
159 * Character/block operations.
160 */
161 static struct cb_ops emul64_cbops = {
162 scsi_hba_open, /* cb_open */
163 scsi_hba_close, /* cb_close */
164 nodev, /* cb_strategy */
165 nodev, /* cb_print */
166 nodev, /* cb_dump */
167 nodev, /* cb_read */
168 nodev, /* cb_write */
169 emul64_ioctl, /* cb_ioctl */
170 nodev, /* cb_devmap */
171 nodev, /* cb_mmap */
172 nodev, /* cb_segmap */
173 nochpoll, /* cb_chpoll */
174 ddi_prop_op, /* cb_prop_op */
175 NULL, /* cb_str */
176 D_MP | D_64BIT | D_HOTPLUG, /* cb_flag */
177 CB_REV, /* cb_rev */
178 nodev, /* cb_aread */
179 nodev /* cb_awrite */
180 };
181
182 /*
183 * autoconfiguration routines.
184 */
185
186 static struct dev_ops emul64_ops = {
187 DEVO_REV, /* rev, */
188 0, /* refcnt */
189 emul64_info, /* getinfo */
190 nulldev, /* identify */
191 nulldev, /* probe */
192 emul64_attach, /* attach */
193 emul64_detach, /* detach */
194 nodev, /* reset */
195 &emul64_cbops, /* char/block ops */
196 NULL, /* bus ops */
197 NULL, /* power */
198 ddi_quiesce_not_needed, /* quiesce */
199 };
200
201 static struct modldrv modldrv = {
202 &mod_driverops, /* module type - driver */
203 "emul64 SCSI Host Bus Adapter", /* module name */
204 &emul64_ops, /* driver ops */
205 };
206
207 static struct modlinkage modlinkage = {
208 MODREV_1, /* ml_rev - must be MODREV_1 */
209 &modldrv, /* ml_linkage */
210 NULL /* end of driver linkage */
211 };
212
213 int
_init(void)214 _init(void)
215 {
216 int ret;
217
218 ret = ddi_soft_state_init(&emul64_state, sizeof (struct emul64),
219 EMUL64_INITIAL_SOFT_SPACE);
220 if (ret != 0)
221 return (ret);
222
223 if ((ret = scsi_hba_init(&modlinkage)) != 0) {
224 ddi_soft_state_fini(&emul64_state);
225 return (ret);
226 }
227
228 /* Set the number of task threads to the number of CPUs */
229 if (boot_max_ncpus == -1) {
230 emul64_task_nthreads = max_ncpus;
231 } else {
232 emul64_task_nthreads = boot_max_ncpus;
233 }
234
235 emul64_bsd_init();
236
237 ret = mod_install(&modlinkage);
238 if (ret != 0) {
239 emul64_bsd_fini();
240 scsi_hba_fini(&modlinkage);
241 ddi_soft_state_fini(&emul64_state);
242 }
243
244 return (ret);
245 }
246
247 int
_fini(void)248 _fini(void)
249 {
250 int ret;
251
252 if ((ret = mod_remove(&modlinkage)) != 0)
253 return (ret);
254
255 emul64_bsd_fini();
256
257 scsi_hba_fini(&modlinkage);
258
259 ddi_soft_state_fini(&emul64_state);
260
261 return (ret);
262 }
263
264 int
_info(struct modinfo * modinfop)265 _info(struct modinfo *modinfop)
266 {
267 return (mod_info(&modlinkage, modinfop));
268 }
269
270 /*
271 * Given the device number return the devinfo pointer
272 * from the scsi_device structure.
273 */
274 /*ARGSUSED*/
275 static int
emul64_info(dev_info_t * dip,ddi_info_cmd_t cmd,void * arg,void ** result)276 emul64_info(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result)
277 {
278 struct emul64 *foo;
279 int instance = getminor((dev_t)arg);
280
281 switch (cmd) {
282 case DDI_INFO_DEVT2DEVINFO:
283 foo = ddi_get_soft_state(emul64_state, instance);
284 if (foo != NULL)
285 *result = (void *)foo->emul64_dip;
286 else {
287 *result = NULL;
288 return (DDI_FAILURE);
289 }
290 break;
291
292 case DDI_INFO_DEVT2INSTANCE:
293 *result = (void *)(uintptr_t)instance;
294 break;
295
296 default:
297 return (DDI_FAILURE);
298 }
299
300 return (DDI_SUCCESS);
301 }
302
303 /*
304 * Attach an instance of an emul64 host adapter. Allocate data structures,
305 * initialize the emul64 and we're on the air.
306 */
307 /*ARGSUSED*/
308 static int
emul64_attach(dev_info_t * dip,ddi_attach_cmd_t cmd)309 emul64_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
310 {
311 int mutex_initted = 0;
312 struct emul64 *emul64;
313 int instance;
314 scsi_hba_tran_t *tran = NULL;
315 ddi_dma_attr_t tmp_dma_attr;
316
317 emul64_bsd_get_props(dip);
318
319 bzero((void *) &tmp_dma_attr, sizeof (tmp_dma_attr));
320 instance = ddi_get_instance(dip);
321
322 switch (cmd) {
323 case DDI_ATTACH:
324 break;
325
326 case DDI_RESUME:
327 tran = (scsi_hba_tran_t *)ddi_get_driver_private(dip);
328 if (!tran) {
329 return (DDI_FAILURE);
330 }
331 emul64 = TRAN2EMUL64(tran);
332
333 return (DDI_SUCCESS);
334
335 default:
336 emul64_i_log(NULL, CE_WARN,
337 "emul64%d: Cmd != DDI_ATTACH/DDI_RESUME", instance);
338 return (DDI_FAILURE);
339 }
340
341 /*
342 * Allocate emul64 data structure.
343 */
344 if (ddi_soft_state_zalloc(emul64_state, instance) != DDI_SUCCESS) {
345 emul64_i_log(NULL, CE_WARN,
346 "emul64%d: Failed to alloc soft state",
347 instance);
348 return (DDI_FAILURE);
349 }
350
351 emul64 = (struct emul64 *)ddi_get_soft_state(emul64_state, instance);
352 if (emul64 == (struct emul64 *)NULL) {
353 emul64_i_log(NULL, CE_WARN, "emul64%d: Bad soft state",
354 instance);
355 ddi_soft_state_free(emul64_state, instance);
356 return (DDI_FAILURE);
357 }
358
359
360 /*
361 * Allocate a transport structure
362 */
363 tran = scsi_hba_tran_alloc(dip, SCSI_HBA_CANSLEEP);
364 if (tran == NULL) {
365 cmn_err(CE_WARN, "emul64: scsi_hba_tran_alloc failed\n");
366 goto fail;
367 }
368
369 emul64->emul64_tran = tran;
370 emul64->emul64_dip = dip;
371
372 tran->tran_hba_private = emul64;
373 tran->tran_tgt_private = NULL;
374 tran->tran_tgt_init = emul64_tran_tgt_init;
375 tran->tran_tgt_probe = scsi_hba_probe;
376 tran->tran_tgt_free = NULL;
377
378 tran->tran_start = emul64_scsi_start;
379 tran->tran_abort = emul64_scsi_abort;
380 tran->tran_reset = emul64_scsi_reset;
381 tran->tran_getcap = emul64_scsi_getcap;
382 tran->tran_setcap = emul64_scsi_setcap;
383 tran->tran_init_pkt = emul64_scsi_init_pkt;
384 tran->tran_destroy_pkt = emul64_scsi_destroy_pkt;
385 tran->tran_dmafree = emul64_scsi_dmafree;
386 tran->tran_sync_pkt = emul64_scsi_sync_pkt;
387 tran->tran_reset_notify = emul64_scsi_reset_notify;
388
389 tmp_dma_attr.dma_attr_minxfer = 0x1;
390 tmp_dma_attr.dma_attr_burstsizes = 0x7f;
391
392 /*
393 * Attach this instance of the hba
394 */
395 if (scsi_hba_attach_setup(dip, &tmp_dma_attr, tran,
396 0) != DDI_SUCCESS) {
397 cmn_err(CE_WARN, "emul64: scsi_hba_attach failed\n");
398 goto fail;
399 }
400
401 emul64->emul64_initiator_id = 2;
402
403 /*
404 * Look up the scsi-options property
405 */
406 emul64->emul64_scsi_options =
407 ddi_prop_get_int(DDI_DEV_T_ANY, dip, 0, "scsi-options",
408 EMUL64_DEFAULT_SCSI_OPTIONS);
409 EMUL64_DEBUG(emul64, SCSI_DEBUG, "emul64 scsi-options=%x",
410 emul64->emul64_scsi_options);
411
412
413 /* mutexes to protect the emul64 request and response queue */
414 mutex_init(EMUL64_REQ_MUTEX(emul64), NULL, MUTEX_DRIVER,
415 emul64->emul64_iblock);
416 mutex_init(EMUL64_RESP_MUTEX(emul64), NULL, MUTEX_DRIVER,
417 emul64->emul64_iblock);
418
419 mutex_initted = 1;
420
421 EMUL64_MUTEX_ENTER(emul64);
422
423 /*
424 * Initialize the default Target Capabilities and Sync Rates
425 */
426 emul64_i_initcap(emul64);
427
428 EMUL64_MUTEX_EXIT(emul64);
429
430
431 ddi_report_dev(dip);
432 emul64->emul64_taskq = taskq_create("emul64_comp",
433 emul64_task_nthreads, MINCLSYSPRI, 1, emul64_max_task, 0);
434
435 return (DDI_SUCCESS);
436
437 fail:
438 emul64_i_log(NULL, CE_WARN, "emul64%d: Unable to attach", instance);
439
440 if (mutex_initted) {
441 mutex_destroy(EMUL64_REQ_MUTEX(emul64));
442 mutex_destroy(EMUL64_RESP_MUTEX(emul64));
443 }
444 if (tran) {
445 scsi_hba_tran_free(tran);
446 }
447 ddi_soft_state_free(emul64_state, instance);
448 return (DDI_FAILURE);
449 }
450
451 /*ARGSUSED*/
452 static int
emul64_detach(dev_info_t * dip,ddi_detach_cmd_t cmd)453 emul64_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
454 {
455 struct emul64 *emul64;
456 scsi_hba_tran_t *tran;
457 int instance = ddi_get_instance(dip);
458
459
460 /* get transport structure pointer from the dip */
461 if (!(tran = (scsi_hba_tran_t *)ddi_get_driver_private(dip))) {
462 return (DDI_FAILURE);
463 }
464
465 /* get soft state from transport structure */
466 emul64 = TRAN2EMUL64(tran);
467
468 if (!emul64) {
469 return (DDI_FAILURE);
470 }
471
472 EMUL64_DEBUG(emul64, SCSI_DEBUG, "emul64_detach: cmd = %d", cmd);
473
474 switch (cmd) {
475 case DDI_DETACH:
476 EMUL64_MUTEX_ENTER(emul64);
477
478 taskq_destroy(emul64->emul64_taskq);
479 (void) scsi_hba_detach(dip);
480
481 scsi_hba_tran_free(emul64->emul64_tran);
482
483
484 EMUL64_MUTEX_EXIT(emul64);
485
486 mutex_destroy(EMUL64_REQ_MUTEX(emul64));
487 mutex_destroy(EMUL64_RESP_MUTEX(emul64));
488
489
490 EMUL64_DEBUG(emul64, SCSI_DEBUG, "emul64_detach: done");
491 ddi_soft_state_free(emul64_state, instance);
492
493 return (DDI_SUCCESS);
494
495 case DDI_SUSPEND:
496 return (DDI_SUCCESS);
497
498 default:
499 return (DDI_FAILURE);
500 }
501 }
502
503 /*
504 * Function name : emul64_tran_tgt_init
505 *
506 * Return Values : DDI_SUCCESS if target supported, DDI_FAILURE otherwise
507 *
508 */
509 /*ARGSUSED*/
510 static int
emul64_tran_tgt_init(dev_info_t * hba_dip,dev_info_t * tgt_dip,scsi_hba_tran_t * tran,struct scsi_device * sd)511 emul64_tran_tgt_init(dev_info_t *hba_dip, dev_info_t *tgt_dip,
512 scsi_hba_tran_t *tran, struct scsi_device *sd)
513 {
514 struct emul64 *emul64;
515 emul64_tgt_t *tgt;
516 char **geo_vidpid = NULL;
517 char *geo, *vidpid;
518 uint32_t *geoip = NULL;
519 uint_t length;
520 uint_t length2;
521 lldaddr_t sector_count;
522 char prop_name[15];
523 int ret = DDI_FAILURE;
524
525 emul64 = TRAN2EMUL64(tran);
526 EMUL64_MUTEX_ENTER(emul64);
527
528 /*
529 * We get called for each target driver.conf node, multiple
530 * nodes may map to the same tgt,lun (sd.conf, st.conf, etc).
531 * Check to see if transport to tgt,lun already established.
532 */
533 tgt = find_tgt(emul64, sd->sd_address.a_target, sd->sd_address.a_lun);
534 if (tgt) {
535 ret = DDI_SUCCESS;
536 goto out;
537 }
538
539 /* see if we have driver.conf specified device for this target,lun */
540 (void) snprintf(prop_name, sizeof (prop_name), "targ_%d_%d",
541 sd->sd_address.a_target, sd->sd_address.a_lun);
542 if (ddi_prop_lookup_string_array(DDI_DEV_T_ANY, hba_dip,
543 DDI_PROP_DONTPASS, prop_name,
544 &geo_vidpid, &length) != DDI_PROP_SUCCESS)
545 goto out;
546 if (length < 2) {
547 cmn_err(CE_WARN, "emul64: %s property does not have 2 "
548 "elements", prop_name);
549 goto out;
550 }
551
552 /* pick geometry name and vidpid string from string array */
553 geo = *geo_vidpid;
554 vidpid = *(geo_vidpid + 1);
555
556 /* lookup geometry property integer array */
557 if (ddi_prop_lookup_int_array(DDI_DEV_T_ANY, hba_dip, DDI_PROP_DONTPASS,
558 geo, (int **)&geoip, &length2) != DDI_PROP_SUCCESS) {
559 cmn_err(CE_WARN, "emul64: didn't get prop '%s'", geo);
560 goto out;
561 }
562 if (length2 < 6) {
563 cmn_err(CE_WARN, "emul64: property %s does not have 6 "
564 "elements", *geo_vidpid);
565 goto out;
566 }
567
568 /* allocate and initialize tgt structure for tgt,lun */
569 tgt = kmem_zalloc(sizeof (emul64_tgt_t), KM_SLEEP);
570 rw_init(&tgt->emul64_tgt_nw_lock, NULL, RW_DRIVER, NULL);
571 mutex_init(&tgt->emul64_tgt_blk_lock, NULL, MUTEX_DRIVER, NULL);
572
573 /* create avl for data block storage */
574 avl_create(&tgt->emul64_tgt_data, emul64_bsd_blkcompare,
575 sizeof (blklist_t), offsetof(blklist_t, bl_node));
576
577 /* save scsi_address and vidpid */
578 bcopy(sd, &tgt->emul64_tgt_saddr, sizeof (struct scsi_address));
579 (void) strncpy(tgt->emul64_tgt_inq, vidpid,
580 sizeof (emul64->emul64_tgt->emul64_tgt_inq));
581
582 /*
583 * The high order 4 bytes of the sector count always come first in
584 * emul64.conf. They are followed by the low order 4 bytes. Not
585 * all CPU types want them in this order, but laddr_t takes care of
586 * this for us. We then pick up geometry (ncyl X nheads X nsect).
587 */
588 sector_count._p._u = *(geoip + 0);
589 sector_count._p._l = *(geoip + 1);
590 /*
591 * On 32-bit platforms, fix block size if it's greater than the
592 * allowable maximum.
593 */
594 #if !defined(_LP64)
595 if (sector_count._f > DK_MAX_BLOCKS)
596 sector_count._f = DK_MAX_BLOCKS;
597 #endif
598 tgt->emul64_tgt_sectors = sector_count._f;
599 tgt->emul64_tgt_dtype = *(geoip + 2);
600 tgt->emul64_tgt_ncyls = *(geoip + 3);
601 tgt->emul64_tgt_nheads = *(geoip + 4);
602 tgt->emul64_tgt_nsect = *(geoip + 5);
603
604 /* insert target structure into list */
605 tgt->emul64_tgt_next = emul64->emul64_tgt;
606 emul64->emul64_tgt = tgt;
607 ret = DDI_SUCCESS;
608
609 out: EMUL64_MUTEX_EXIT(emul64);
610 if (geoip)
611 ddi_prop_free(geoip);
612 if (geo_vidpid)
613 ddi_prop_free(geo_vidpid);
614 return (ret);
615 }
616
617 /*
618 * Function name : emul64_i_initcap
619 *
620 * Return Values : NONE
621 * Description : Initializes the default target capabilities and
622 * Sync Rates.
623 *
624 * Context : Called from the user thread through attach.
625 *
626 */
627 static void
emul64_i_initcap(struct emul64 * emul64)628 emul64_i_initcap(struct emul64 *emul64)
629 {
630 uint16_t cap, synch;
631 int i;
632
633 cap = 0;
634 synch = 0;
635 for (i = 0; i < NTARGETS_WIDE; i++) {
636 emul64->emul64_cap[i] = cap;
637 emul64->emul64_synch[i] = synch;
638 }
639 EMUL64_DEBUG(emul64, SCSI_DEBUG, "default cap = 0x%x", cap);
640 }
641
642 /*
643 * Function name : emul64_scsi_getcap()
644 *
645 * Return Values : current value of capability, if defined
646 * -1 if capability is not defined
647 * Description : returns current capability value
648 *
649 * Context : Can be called from different kernel process threads.
650 * Can be called by interrupt thread.
651 */
652 static int
emul64_scsi_getcap(struct scsi_address * ap,char * cap,int whom)653 emul64_scsi_getcap(struct scsi_address *ap, char *cap, int whom)
654 {
655 struct emul64 *emul64 = ADDR2EMUL64(ap);
656 int rval = 0;
657
658 /*
659 * We don't allow inquiring about capabilities for other targets
660 */
661 if (cap == NULL || whom == 0) {
662 return (-1);
663 }
664
665 EMUL64_MUTEX_ENTER(emul64);
666
667 switch (scsi_hba_lookup_capstr(cap)) {
668 case SCSI_CAP_DMA_MAX:
669 rval = 1 << 24; /* Limit to 16MB max transfer */
670 break;
671 case SCSI_CAP_MSG_OUT:
672 rval = 1;
673 break;
674 case SCSI_CAP_DISCONNECT:
675 rval = 1;
676 break;
677 case SCSI_CAP_SYNCHRONOUS:
678 rval = 1;
679 break;
680 case SCSI_CAP_WIDE_XFER:
681 rval = 1;
682 break;
683 case SCSI_CAP_TAGGED_QING:
684 rval = 1;
685 break;
686 case SCSI_CAP_UNTAGGED_QING:
687 rval = 1;
688 break;
689 case SCSI_CAP_PARITY:
690 rval = 1;
691 break;
692 case SCSI_CAP_INITIATOR_ID:
693 rval = emul64->emul64_initiator_id;
694 break;
695 case SCSI_CAP_ARQ:
696 rval = 1;
697 break;
698 case SCSI_CAP_LINKED_CMDS:
699 break;
700 case SCSI_CAP_RESET_NOTIFICATION:
701 rval = 1;
702 break;
703
704 default:
705 rval = -1;
706 break;
707 }
708
709 EMUL64_MUTEX_EXIT(emul64);
710
711 return (rval);
712 }
713
714 /*
715 * Function name : emul64_scsi_setcap()
716 *
717 * Return Values : 1 - capability exists and can be set to new value
718 * 0 - capability could not be set to new value
719 * -1 - no such capability
720 *
721 * Description : sets a capability for a target
722 *
723 * Context : Can be called from different kernel process threads.
724 * Can be called by interrupt thread.
725 */
726 static int
emul64_scsi_setcap(struct scsi_address * ap,char * cap,int value,int whom)727 emul64_scsi_setcap(struct scsi_address *ap, char *cap, int value, int whom)
728 {
729 struct emul64 *emul64 = ADDR2EMUL64(ap);
730 int rval = 0;
731
732 /*
733 * We don't allow setting capabilities for other targets
734 */
735 if (cap == NULL || whom == 0) {
736 return (-1);
737 }
738
739 EMUL64_MUTEX_ENTER(emul64);
740
741 switch (scsi_hba_lookup_capstr(cap)) {
742 case SCSI_CAP_DMA_MAX:
743 case SCSI_CAP_MSG_OUT:
744 case SCSI_CAP_PARITY:
745 case SCSI_CAP_UNTAGGED_QING:
746 case SCSI_CAP_LINKED_CMDS:
747 case SCSI_CAP_RESET_NOTIFICATION:
748 /*
749 * None of these are settable via
750 * the capability interface.
751 */
752 break;
753 case SCSI_CAP_DISCONNECT:
754 rval = 1;
755 break;
756 case SCSI_CAP_SYNCHRONOUS:
757 rval = 1;
758 break;
759 case SCSI_CAP_TAGGED_QING:
760 rval = 1;
761 break;
762 case SCSI_CAP_WIDE_XFER:
763 rval = 1;
764 break;
765 case SCSI_CAP_INITIATOR_ID:
766 rval = -1;
767 break;
768 case SCSI_CAP_ARQ:
769 rval = 1;
770 break;
771 case SCSI_CAP_TOTAL_SECTORS:
772 emul64->nt_total_sectors[ap->a_target][ap->a_lun] = value;
773 rval = TRUE;
774 break;
775 case SCSI_CAP_SECTOR_SIZE:
776 rval = TRUE;
777 break;
778 default:
779 rval = -1;
780 break;
781 }
782
783
784 EMUL64_MUTEX_EXIT(emul64);
785
786 return (rval);
787 }
788
789 /*
790 * Function name : emul64_scsi_init_pkt
791 *
792 * Return Values : pointer to scsi_pkt, or NULL
793 * Description : Called by kernel on behalf of a target driver
794 * calling scsi_init_pkt(9F).
795 * Refer to tran_init_pkt(9E) man page
796 *
797 * Context : Can be called from different kernel process threads.
798 * Can be called by interrupt thread.
799 */
800 /* ARGSUSED */
801 static struct scsi_pkt *
emul64_scsi_init_pkt(struct scsi_address * ap,struct scsi_pkt * pkt,struct buf * bp,int cmdlen,int statuslen,int tgtlen,int flags,int (* callback)(),caddr_t arg)802 emul64_scsi_init_pkt(struct scsi_address *ap, struct scsi_pkt *pkt,
803 struct buf *bp, int cmdlen, int statuslen, int tgtlen,
804 int flags, int (*callback)(), caddr_t arg)
805 {
806 struct emul64 *emul64 = ADDR2EMUL64(ap);
807 struct emul64_cmd *sp;
808
809 ASSERT(callback == NULL_FUNC || callback == SLEEP_FUNC);
810
811 /*
812 * First step of emul64_scsi_init_pkt: pkt allocation
813 */
814 if (pkt == NULL) {
815 pkt = scsi_hba_pkt_alloc(emul64->emul64_dip, ap, cmdlen,
816 statuslen,
817 tgtlen, sizeof (struct emul64_cmd), callback, arg);
818 if (pkt == NULL) {
819 cmn_err(CE_WARN, "emul64_scsi_init_pkt: "
820 "scsi_hba_pkt_alloc failed");
821 return (NULL);
822 }
823
824 sp = PKT2CMD(pkt);
825
826 /*
827 * Initialize the new pkt - we redundantly initialize
828 * all the fields for illustrative purposes.
829 */
830 sp->cmd_pkt = pkt;
831 sp->cmd_flags = 0;
832 sp->cmd_scblen = statuslen;
833 sp->cmd_cdblen = cmdlen;
834 sp->cmd_emul64 = emul64;
835 pkt->pkt_address = *ap;
836 pkt->pkt_comp = (void (*)())NULL;
837 pkt->pkt_flags = 0;
838 pkt->pkt_time = 0;
839 pkt->pkt_resid = 0;
840 pkt->pkt_statistics = 0;
841 pkt->pkt_reason = 0;
842
843 } else {
844 sp = PKT2CMD(pkt);
845 }
846
847 /*
848 * Second step of emul64_scsi_init_pkt: dma allocation/move
849 */
850 if (bp && bp->b_bcount != 0) {
851 if (bp->b_flags & B_READ) {
852 sp->cmd_flags &= ~CFLAG_DMASEND;
853 } else {
854 sp->cmd_flags |= CFLAG_DMASEND;
855 }
856 bp_mapin(bp);
857 sp->cmd_addr = (unsigned char *) bp->b_un.b_addr;
858 sp->cmd_count = bp->b_bcount;
859 pkt->pkt_resid = 0;
860 }
861
862 return (pkt);
863 }
864
865
866 /*
867 * Function name : emul64_scsi_destroy_pkt
868 *
869 * Return Values : none
870 * Description : Called by kernel on behalf of a target driver
871 * calling scsi_destroy_pkt(9F).
872 * Refer to tran_destroy_pkt(9E) man page
873 *
874 * Context : Can be called from different kernel process threads.
875 * Can be called by interrupt thread.
876 */
877 static void
emul64_scsi_destroy_pkt(struct scsi_address * ap,struct scsi_pkt * pkt)878 emul64_scsi_destroy_pkt(struct scsi_address *ap, struct scsi_pkt *pkt)
879 {
880 struct emul64_cmd *sp = PKT2CMD(pkt);
881
882 /*
883 * emul64_scsi_dmafree inline to make things faster
884 */
885 if (sp->cmd_flags & CFLAG_DMAVALID) {
886 /*
887 * Free the mapping.
888 */
889 sp->cmd_flags &= ~CFLAG_DMAVALID;
890 }
891
892 /*
893 * Free the pkt
894 */
895 scsi_hba_pkt_free(ap, pkt);
896 }
897
898
899 /*
900 * Function name : emul64_scsi_dmafree()
901 *
902 * Return Values : none
903 * Description : free dvma resources
904 *
905 * Context : Can be called from different kernel process threads.
906 * Can be called by interrupt thread.
907 */
908 /*ARGSUSED*/
909 static void
emul64_scsi_dmafree(struct scsi_address * ap,struct scsi_pkt * pkt)910 emul64_scsi_dmafree(struct scsi_address *ap, struct scsi_pkt *pkt)
911 {
912 }
913
914 /*
915 * Function name : emul64_scsi_sync_pkt()
916 *
917 * Return Values : none
918 * Description : sync dma
919 *
920 * Context : Can be called from different kernel process threads.
921 * Can be called by interrupt thread.
922 */
923 /*ARGSUSED*/
924 static void
emul64_scsi_sync_pkt(struct scsi_address * ap,struct scsi_pkt * pkt)925 emul64_scsi_sync_pkt(struct scsi_address *ap, struct scsi_pkt *pkt)
926 {
927 }
928
929 /*
930 * routine for reset notification setup, to register or cancel.
931 */
932 static int
emul64_scsi_reset_notify(struct scsi_address * ap,int flag,void (* callback)(caddr_t),caddr_t arg)933 emul64_scsi_reset_notify(struct scsi_address *ap, int flag,
934 void (*callback)(caddr_t), caddr_t arg)
935 {
936 struct emul64 *emul64 = ADDR2EMUL64(ap);
937 struct emul64_reset_notify_entry *p, *beforep;
938 int rval = DDI_FAILURE;
939
940 mutex_enter(EMUL64_REQ_MUTEX(emul64));
941
942 p = emul64->emul64_reset_notify_listf;
943 beforep = NULL;
944
945 while (p) {
946 if (p->ap == ap)
947 break; /* An entry exists for this target */
948 beforep = p;
949 p = p->next;
950 }
951
952 if ((flag & SCSI_RESET_CANCEL) && (p != NULL)) {
953 if (beforep == NULL) {
954 emul64->emul64_reset_notify_listf = p->next;
955 } else {
956 beforep->next = p->next;
957 }
958 kmem_free((caddr_t)p,
959 sizeof (struct emul64_reset_notify_entry));
960 rval = DDI_SUCCESS;
961
962 } else if ((flag & SCSI_RESET_NOTIFY) && (p == NULL)) {
963 p = kmem_zalloc(sizeof (struct emul64_reset_notify_entry),
964 KM_SLEEP);
965 p->ap = ap;
966 p->callback = callback;
967 p->arg = arg;
968 p->next = emul64->emul64_reset_notify_listf;
969 emul64->emul64_reset_notify_listf = p;
970 rval = DDI_SUCCESS;
971 }
972
973 mutex_exit(EMUL64_REQ_MUTEX(emul64));
974
975 return (rval);
976 }
977
978 /*
979 * Function name : emul64_scsi_start()
980 *
981 * Return Values : TRAN_FATAL_ERROR - emul64 has been shutdown
982 * TRAN_BUSY - request queue is full
983 * TRAN_ACCEPT - pkt has been submitted to emul64
984 *
985 * Description : init pkt, start the request
986 *
987 * Context : Can be called from different kernel process threads.
988 * Can be called by interrupt thread.
989 */
990 static int
emul64_scsi_start(struct scsi_address * ap,struct scsi_pkt * pkt)991 emul64_scsi_start(struct scsi_address *ap, struct scsi_pkt *pkt)
992 {
993 struct emul64_cmd *sp = PKT2CMD(pkt);
994 int rval = TRAN_ACCEPT;
995 struct emul64 *emul64 = ADDR2EMUL64(ap);
996 clock_t cur_lbolt;
997 taskqid_t dispatched;
998
999 ASSERT(mutex_owned(EMUL64_REQ_MUTEX(emul64)) == 0 || ddi_in_panic());
1000 ASSERT(mutex_owned(EMUL64_RESP_MUTEX(emul64)) == 0 || ddi_in_panic());
1001
1002 EMUL64_DEBUG2(emul64, SCSI_DEBUG, "emul64_scsi_start %x", sp);
1003
1004 pkt->pkt_reason = CMD_CMPLT;
1005
1006 #ifdef EMUL64DEBUG
1007 if (emul64_cdb_debug) {
1008 emul64_debug_dump_cdb(ap, pkt);
1009 }
1010 #endif /* EMUL64DEBUG */
1011
1012 /*
1013 * calculate deadline from pkt_time
1014 * Instead of multiplying by 100 (ie. HZ), we multiply by 128 so
1015 * we can shift and at the same time have a 28% grace period
1016 * we ignore the rare case of pkt_time == 0 and deal with it
1017 * in emul64_i_watch()
1018 */
1019 cur_lbolt = ddi_get_lbolt();
1020 sp->cmd_deadline = cur_lbolt + (pkt->pkt_time * 128);
1021
1022 if ((emul64_usetaskq == 0) || (pkt->pkt_flags & FLAG_NOINTR) != 0) {
1023 emul64_pkt_comp((caddr_t)pkt);
1024 } else {
1025 dispatched = TASKQID_INVALID;
1026 if (emul64_collect_stats) {
1027 /*
1028 * If we are collecting statistics, call
1029 * taskq_dispatch in no sleep mode, so that we can
1030 * detect if we are exceeding the queue length that
1031 * was established in the call to taskq_create in
1032 * emul64_attach. If the no sleep call fails
1033 * (returns NULL), the task will be dispatched in
1034 * sleep mode below.
1035 */
1036 dispatched = taskq_dispatch(emul64->emul64_taskq,
1037 emul64_pkt_comp, (void *)pkt, TQ_NOSLEEP);
1038 if (dispatched == TASKQID_INVALID) {
1039 /* Queue was full. dispatch failed. */
1040 mutex_enter(&emul64_stats_mutex);
1041 emul64_taskq_max++;
1042 mutex_exit(&emul64_stats_mutex);
1043 }
1044 }
1045 if (dispatched == TASKQID_INVALID) {
1046 (void) taskq_dispatch(emul64->emul64_taskq,
1047 emul64_pkt_comp, (void *)pkt, TQ_SLEEP);
1048 }
1049 }
1050
1051 ASSERT(mutex_owned(EMUL64_REQ_MUTEX(emul64)) == 0 || ddi_in_panic());
1052 ASSERT(mutex_owned(EMUL64_RESP_MUTEX(emul64)) == 0 || ddi_in_panic());
1053
1054 return (rval);
1055 }
1056
1057 void
emul64_check_cond(struct scsi_pkt * pkt,uchar_t key,uchar_t asc,uchar_t ascq)1058 emul64_check_cond(struct scsi_pkt *pkt, uchar_t key, uchar_t asc, uchar_t ascq)
1059 {
1060 struct scsi_arq_status *arq =
1061 (struct scsi_arq_status *)pkt->pkt_scbp;
1062
1063 /* got check, no data transferred and ARQ done */
1064 arq->sts_status.sts_chk = 1;
1065 pkt->pkt_state |= STATE_ARQ_DONE;
1066 pkt->pkt_state &= ~STATE_XFERRED_DATA;
1067
1068 /* for ARQ */
1069 arq->sts_rqpkt_reason = CMD_CMPLT;
1070 arq->sts_rqpkt_resid = 0;
1071 arq->sts_rqpkt_state = STATE_GOT_BUS | STATE_GOT_TARGET |
1072 STATE_SENT_CMD | STATE_XFERRED_DATA | STATE_GOT_STATUS;
1073 arq->sts_sensedata.es_valid = 1;
1074 arq->sts_sensedata.es_class = 0x7;
1075 arq->sts_sensedata.es_key = key;
1076 arq->sts_sensedata.es_add_code = asc;
1077 arq->sts_sensedata.es_qual_code = ascq;
1078 }
1079
1080 ushort_t
emul64_error_inject(struct scsi_pkt * pkt)1081 emul64_error_inject(struct scsi_pkt *pkt)
1082 {
1083 struct emul64_cmd *sp = PKT2CMD(pkt);
1084 emul64_tgt_t *tgt;
1085 struct scsi_arq_status *arq =
1086 (struct scsi_arq_status *)pkt->pkt_scbp;
1087 uint_t max_sense_len;
1088
1089 EMUL64_MUTEX_ENTER(sp->cmd_emul64);
1090 tgt = find_tgt(sp->cmd_emul64,
1091 pkt->pkt_address.a_target, pkt->pkt_address.a_lun);
1092 EMUL64_MUTEX_EXIT(sp->cmd_emul64);
1093
1094 /*
1095 * If there is no target, skip the error injection and
1096 * let the packet be handled normally. This would normally
1097 * never happen since a_target and a_lun are setup in
1098 * emul64_scsi_init_pkt.
1099 */
1100 if (tgt == NULL) {
1101 return (ERR_INJ_DISABLE);
1102 }
1103
1104 if (tgt->emul64_einj_state != ERR_INJ_DISABLE) {
1105 arq->sts_status = tgt->emul64_einj_scsi_status;
1106 pkt->pkt_state = tgt->emul64_einj_pkt_state;
1107 pkt->pkt_reason = tgt->emul64_einj_pkt_reason;
1108
1109 /*
1110 * Calculate available sense buffer length. We could just
1111 * assume sizeof(struct scsi_extended_sense) but hopefully
1112 * that limitation will go away soon.
1113 */
1114 max_sense_len = sp->cmd_scblen -
1115 (sizeof (struct scsi_arq_status) -
1116 sizeof (struct scsi_extended_sense));
1117 if (max_sense_len > tgt->emul64_einj_sense_length) {
1118 max_sense_len = tgt->emul64_einj_sense_length;
1119 }
1120
1121 /* for ARQ */
1122 arq->sts_rqpkt_reason = CMD_CMPLT;
1123 arq->sts_rqpkt_resid = 0;
1124 arq->sts_rqpkt_state = STATE_GOT_BUS | STATE_GOT_TARGET |
1125 STATE_SENT_CMD | STATE_XFERRED_DATA | STATE_GOT_STATUS;
1126
1127 /* Copy sense data */
1128 if (tgt->emul64_einj_sense_data != 0) {
1129 bcopy(tgt->emul64_einj_sense_data,
1130 (uint8_t *)&arq->sts_sensedata,
1131 max_sense_len);
1132 }
1133 }
1134
1135 /* Return current error injection state */
1136 return (tgt->emul64_einj_state);
1137 }
1138
1139 int
emul64_error_inject_req(struct emul64 * emul64,intptr_t arg)1140 emul64_error_inject_req(struct emul64 *emul64, intptr_t arg)
1141 {
1142 emul64_tgt_t *tgt;
1143 struct emul64_error_inj_data error_inj_req;
1144
1145 /* Check args */
1146 if (arg == (intptr_t)NULL) {
1147 return (EINVAL);
1148 }
1149
1150 if (ddi_copyin((void *)arg, &error_inj_req,
1151 sizeof (error_inj_req), 0) != 0) {
1152 cmn_err(CE_WARN, "emul64: ioctl - inj copyin failed\n");
1153 return (EFAULT);
1154 }
1155
1156 EMUL64_MUTEX_ENTER(emul64);
1157 tgt = find_tgt(emul64, error_inj_req.eccd_target,
1158 error_inj_req.eccd_lun);
1159 EMUL64_MUTEX_EXIT(emul64);
1160
1161 /* Make sure device exists */
1162 if (tgt == NULL) {
1163 return (ENODEV);
1164 }
1165
1166 /* Free old sense buffer if we have one */
1167 if (tgt->emul64_einj_sense_data != NULL) {
1168 ASSERT(tgt->emul64_einj_sense_length != 0);
1169 kmem_free(tgt->emul64_einj_sense_data,
1170 tgt->emul64_einj_sense_length);
1171 tgt->emul64_einj_sense_data = NULL;
1172 tgt->emul64_einj_sense_length = 0;
1173 }
1174
1175 /*
1176 * Now handle error injection request. If error injection
1177 * is requested we will return the sense data provided for
1178 * any I/O to this target until told to stop.
1179 */
1180 tgt->emul64_einj_state = error_inj_req.eccd_inj_state;
1181 tgt->emul64_einj_sense_length = error_inj_req.eccd_sns_dlen;
1182 tgt->emul64_einj_pkt_state = error_inj_req.eccd_pkt_state;
1183 tgt->emul64_einj_pkt_reason = error_inj_req.eccd_pkt_reason;
1184 tgt->emul64_einj_scsi_status = error_inj_req.eccd_scsi_status;
1185 switch (error_inj_req.eccd_inj_state) {
1186 case ERR_INJ_ENABLE:
1187 case ERR_INJ_ENABLE_NODATA:
1188 if (error_inj_req.eccd_sns_dlen) {
1189 tgt->emul64_einj_sense_data =
1190 kmem_alloc(error_inj_req.eccd_sns_dlen, KM_SLEEP);
1191 /* Copy sense data */
1192 if (ddi_copyin((void *)(arg + sizeof (error_inj_req)),
1193 tgt->emul64_einj_sense_data,
1194 error_inj_req.eccd_sns_dlen, 0) != 0) {
1195 cmn_err(CE_WARN,
1196 "emul64: sense data copy in failed\n");
1197 return (EFAULT);
1198 }
1199 }
1200 break;
1201 case ERR_INJ_DISABLE:
1202 default:
1203 break;
1204 }
1205
1206 return (0);
1207 }
1208
1209 int bsd_scsi_start_stop_unit(struct scsi_pkt *);
1210 int bsd_scsi_test_unit_ready(struct scsi_pkt *);
1211 int bsd_scsi_request_sense(struct scsi_pkt *);
1212 int bsd_scsi_inquiry(struct scsi_pkt *);
1213 int bsd_scsi_format(struct scsi_pkt *);
1214 int bsd_scsi_io(struct scsi_pkt *);
1215 int bsd_scsi_log_sense(struct scsi_pkt *);
1216 int bsd_scsi_mode_sense(struct scsi_pkt *);
1217 int bsd_scsi_mode_select(struct scsi_pkt *);
1218 int bsd_scsi_read_capacity(struct scsi_pkt *);
1219 int bsd_scsi_read_capacity_16(struct scsi_pkt *);
1220 int bsd_scsi_reserve(struct scsi_pkt *);
1221 int bsd_scsi_format(struct scsi_pkt *);
1222 int bsd_scsi_release(struct scsi_pkt *);
1223 int bsd_scsi_read_defect_list(struct scsi_pkt *);
1224 int bsd_scsi_reassign_block(struct scsi_pkt *);
1225 int bsd_freeblkrange(emul64_tgt_t *, emul64_range_t *);
1226
1227 static void
emul64_handle_cmd(struct scsi_pkt * pkt)1228 emul64_handle_cmd(struct scsi_pkt *pkt)
1229 {
1230 if (emul64_error_inject(pkt) == ERR_INJ_ENABLE_NODATA) {
1231 /*
1232 * If error injection is configured to return with
1233 * no data return now without handling the command.
1234 * This is how normal check conditions work.
1235 *
1236 * If the error injection state is ERR_INJ_ENABLE
1237 * (or if error injection is disabled) continue and
1238 * handle the command. This would be used for
1239 * KEY_RECOVERABLE_ERROR type conditions.
1240 */
1241 return;
1242 }
1243
1244 switch (pkt->pkt_cdbp[0]) {
1245 case SCMD_START_STOP:
1246 (void) bsd_scsi_start_stop_unit(pkt);
1247 break;
1248 case SCMD_TEST_UNIT_READY:
1249 (void) bsd_scsi_test_unit_ready(pkt);
1250 break;
1251 case SCMD_REQUEST_SENSE:
1252 (void) bsd_scsi_request_sense(pkt);
1253 break;
1254 case SCMD_INQUIRY:
1255 (void) bsd_scsi_inquiry(pkt);
1256 break;
1257 case SCMD_FORMAT:
1258 (void) bsd_scsi_format(pkt);
1259 break;
1260 case SCMD_READ:
1261 case SCMD_WRITE:
1262 case SCMD_READ_G1:
1263 case SCMD_WRITE_G1:
1264 case SCMD_READ_G4:
1265 case SCMD_WRITE_G4:
1266 (void) bsd_scsi_io(pkt);
1267 break;
1268 case SCMD_LOG_SENSE_G1:
1269 (void) bsd_scsi_log_sense(pkt);
1270 break;
1271 case SCMD_MODE_SENSE:
1272 case SCMD_MODE_SENSE_G1:
1273 (void) bsd_scsi_mode_sense(pkt);
1274 break;
1275 case SCMD_MODE_SELECT:
1276 case SCMD_MODE_SELECT_G1:
1277 (void) bsd_scsi_mode_select(pkt);
1278 break;
1279 case SCMD_READ_CAPACITY:
1280 (void) bsd_scsi_read_capacity(pkt);
1281 break;
1282 case SCMD_SVC_ACTION_IN_G4:
1283 if (pkt->pkt_cdbp[1] == SSVC_ACTION_READ_CAPACITY_G4) {
1284 (void) bsd_scsi_read_capacity_16(pkt);
1285 } else {
1286 cmn_err(CE_WARN, "emul64: unrecognized G4 service "
1287 "action 0x%x", pkt->pkt_cdbp[1]);
1288 }
1289 break;
1290 case SCMD_RESERVE:
1291 case SCMD_RESERVE_G1:
1292 (void) bsd_scsi_reserve(pkt);
1293 break;
1294 case SCMD_RELEASE:
1295 case SCMD_RELEASE_G1:
1296 (void) bsd_scsi_release(pkt);
1297 break;
1298 case SCMD_REASSIGN_BLOCK:
1299 (void) bsd_scsi_reassign_block(pkt);
1300 break;
1301 case SCMD_READ_DEFECT_LIST:
1302 (void) bsd_scsi_read_defect_list(pkt);
1303 break;
1304 case SCMD_PRIN:
1305 case SCMD_PROUT:
1306 case SCMD_REPORT_LUNS:
1307 /* ASC 0x24 INVALID FIELD IN CDB */
1308 emul64_check_cond(pkt, KEY_ILLEGAL_REQUEST, 0x24, 0x0);
1309 break;
1310 default:
1311 cmn_err(CE_WARN, "emul64: unrecognized "
1312 "SCSI cmd 0x%x", pkt->pkt_cdbp[0]);
1313 emul64_check_cond(pkt, KEY_ILLEGAL_REQUEST, 0x24, 0x0);
1314 break;
1315 case SCMD_GET_CONFIGURATION:
1316 case 0x35: /* SCMD_SYNCHRONIZE_CACHE */
1317 /* Don't complain */
1318 break;
1319 }
1320 }
1321
1322 static void
emul64_pkt_comp(void * arg)1323 emul64_pkt_comp(void * arg)
1324 {
1325 struct scsi_pkt *pkt = (struct scsi_pkt *)arg;
1326 struct emul64_cmd *sp = PKT2CMD(pkt);
1327 emul64_tgt_t *tgt;
1328
1329 EMUL64_MUTEX_ENTER(sp->cmd_emul64);
1330 tgt = find_tgt(sp->cmd_emul64,
1331 pkt->pkt_address.a_target, pkt->pkt_address.a_lun);
1332 EMUL64_MUTEX_EXIT(sp->cmd_emul64);
1333 if (!tgt) {
1334 pkt->pkt_reason = CMD_TIMEOUT;
1335 pkt->pkt_state = STATE_GOT_BUS | STATE_SENT_CMD;
1336 pkt->pkt_statistics = STAT_TIMEOUT;
1337 } else {
1338 pkt->pkt_reason = CMD_CMPLT;
1339 *pkt->pkt_scbp = STATUS_GOOD;
1340 pkt->pkt_state = STATE_GOT_BUS | STATE_GOT_TARGET |
1341 STATE_SENT_CMD | STATE_XFERRED_DATA | STATE_GOT_STATUS;
1342 pkt->pkt_statistics = 0;
1343 emul64_handle_cmd(pkt);
1344 }
1345 scsi_hba_pkt_comp(pkt);
1346 }
1347
1348 /* ARGSUSED */
1349 static int
emul64_scsi_abort(struct scsi_address * ap,struct scsi_pkt * pkt)1350 emul64_scsi_abort(struct scsi_address *ap, struct scsi_pkt *pkt)
1351 {
1352 return (1);
1353 }
1354
1355 /* ARGSUSED */
1356 static int
emul64_scsi_reset(struct scsi_address * ap,int level)1357 emul64_scsi_reset(struct scsi_address *ap, int level)
1358 {
1359 return (1);
1360 }
1361
1362 static int
emul64_get_tgtrange(struct emul64 * emul64,intptr_t arg,emul64_tgt_t ** tgtp,emul64_tgt_range_t * tgtr)1363 emul64_get_tgtrange(struct emul64 *emul64, intptr_t arg, emul64_tgt_t **tgtp,
1364 emul64_tgt_range_t *tgtr)
1365 {
1366 if (ddi_copyin((void *)arg, tgtr, sizeof (*tgtr), 0) != 0) {
1367 cmn_err(CE_WARN, "emul64: ioctl - copy in failed\n");
1368 return (EFAULT);
1369 }
1370 EMUL64_MUTEX_ENTER(emul64);
1371 *tgtp = find_tgt(emul64, tgtr->emul64_target, tgtr->emul64_lun);
1372 EMUL64_MUTEX_EXIT(emul64);
1373 if (*tgtp == NULL) {
1374 cmn_err(CE_WARN, "emul64: ioctl - no target for %d,%d on %d",
1375 tgtr->emul64_target, tgtr->emul64_lun,
1376 ddi_get_instance(emul64->emul64_dip));
1377 return (ENXIO);
1378 }
1379 return (0);
1380 }
1381
1382 static int
emul64_ioctl(dev_t dev,int cmd,intptr_t arg,int mode,cred_t * credp,int * rvalp)1383 emul64_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp,
1384 int *rvalp)
1385 {
1386 struct emul64 *emul64;
1387 int instance;
1388 int rv = 0;
1389 emul64_tgt_range_t tgtr;
1390 emul64_tgt_t *tgt;
1391
1392 instance = MINOR2INST(getminor(dev));
1393 emul64 = (struct emul64 *)ddi_get_soft_state(emul64_state, instance);
1394 if (emul64 == NULL) {
1395 cmn_err(CE_WARN, "emul64: ioctl - no softstate for %d\n",
1396 getminor(dev));
1397 return (ENXIO);
1398 }
1399
1400 switch (cmd) {
1401 case EMUL64_WRITE_OFF:
1402 rv = emul64_get_tgtrange(emul64, arg, &tgt, &tgtr);
1403 if (rv == 0) {
1404 rv = emul64_write_off(emul64, tgt, &tgtr);
1405 }
1406 break;
1407 case EMUL64_WRITE_ON:
1408 rv = emul64_get_tgtrange(emul64, arg, &tgt, &tgtr);
1409 if (rv == 0) {
1410 rv = emul64_write_on(emul64, tgt, &tgtr);
1411 }
1412 break;
1413 case EMUL64_ZERO_RANGE:
1414 rv = emul64_get_tgtrange(emul64, arg, &tgt, &tgtr);
1415 if (rv == 0) {
1416 mutex_enter(&tgt->emul64_tgt_blk_lock);
1417 rv = bsd_freeblkrange(tgt, &tgtr.emul64_blkrange);
1418 mutex_exit(&tgt->emul64_tgt_blk_lock);
1419 }
1420 break;
1421 case EMUL64_ERROR_INJECT:
1422 rv = emul64_error_inject_req(emul64, arg);
1423 break;
1424 default:
1425 rv = scsi_hba_ioctl(dev, cmd, arg, mode, credp, rvalp);
1426 break;
1427 }
1428 return (rv);
1429 }
1430
1431 /* ARGSUSED */
1432 static int
emul64_write_off(struct emul64 * emul64,emul64_tgt_t * tgt,emul64_tgt_range_t * tgtr)1433 emul64_write_off(struct emul64 *emul64, emul64_tgt_t *tgt,
1434 emul64_tgt_range_t *tgtr)
1435 {
1436 size_t blkcnt = tgtr->emul64_blkrange.emul64_blkcnt;
1437 emul64_nowrite_t *cur;
1438 emul64_nowrite_t *nowrite;
1439 emul64_rng_overlap_t overlap = O_NONE;
1440 emul64_nowrite_t **prev = NULL;
1441 diskaddr_t sb = tgtr->emul64_blkrange.emul64_sb;
1442
1443 nowrite = emul64_nowrite_alloc(&tgtr->emul64_blkrange);
1444
1445 /* Find spot in list */
1446 rw_enter(&tgt->emul64_tgt_nw_lock, RW_WRITER);
1447 cur = emul64_find_nowrite(tgt, sb, blkcnt, &overlap, &prev);
1448 if (overlap == O_NONE) {
1449 /* Insert into list */
1450 *prev = nowrite;
1451 nowrite->emul64_nwnext = cur;
1452 }
1453 rw_exit(&tgt->emul64_tgt_nw_lock);
1454 if (overlap == O_NONE) {
1455 if (emul64_collect_stats) {
1456 mutex_enter(&emul64_stats_mutex);
1457 emul64_nowrite_count++;
1458 mutex_exit(&emul64_stats_mutex);
1459 }
1460 } else {
1461 cmn_err(CE_WARN, "emul64: EMUL64_WRITE_OFF 0x%llx,0x%"
1462 PRIx64 "overlaps 0x%llx,0x%" PRIx64 "\n",
1463 nowrite->emul64_blocked.emul64_sb,
1464 nowrite->emul64_blocked.emul64_blkcnt,
1465 cur->emul64_blocked.emul64_sb,
1466 cur->emul64_blocked.emul64_blkcnt);
1467 emul64_nowrite_free(nowrite);
1468 return (EINVAL);
1469 }
1470 return (0);
1471 }
1472
1473 /* ARGSUSED */
1474 static int
emul64_write_on(struct emul64 * emul64,emul64_tgt_t * tgt,emul64_tgt_range_t * tgtr)1475 emul64_write_on(struct emul64 *emul64, emul64_tgt_t *tgt,
1476 emul64_tgt_range_t *tgtr)
1477 {
1478 size_t blkcnt = tgtr->emul64_blkrange.emul64_blkcnt;
1479 emul64_nowrite_t *cur;
1480 emul64_rng_overlap_t overlap = O_NONE;
1481 emul64_nowrite_t **prev = NULL;
1482 int rv = 0;
1483 diskaddr_t sb = tgtr->emul64_blkrange.emul64_sb;
1484
1485 /* Find spot in list */
1486 rw_enter(&tgt->emul64_tgt_nw_lock, RW_WRITER);
1487 cur = emul64_find_nowrite(tgt, sb, blkcnt, &overlap, &prev);
1488 if (overlap == O_SAME) {
1489 /* Remove from list */
1490 *prev = cur->emul64_nwnext;
1491 }
1492 rw_exit(&tgt->emul64_tgt_nw_lock);
1493
1494 switch (overlap) {
1495 case O_NONE:
1496 cmn_err(CE_WARN, "emul64: EMUL64_WRITE_ON 0x%llx,0x%lx "
1497 "range not found\n", sb, blkcnt);
1498 rv = ENXIO;
1499 break;
1500 case O_SAME:
1501 if (emul64_collect_stats) {
1502 mutex_enter(&emul64_stats_mutex);
1503 emul64_nowrite_count--;
1504 mutex_exit(&emul64_stats_mutex);
1505 }
1506 emul64_nowrite_free(cur);
1507 break;
1508 case O_OVERLAP:
1509 case O_SUBSET:
1510 cmn_err(CE_WARN, "emul64: EMUL64_WRITE_ON 0x%llx,0x%lx "
1511 "overlaps 0x%llx,0x%" PRIx64 "\n",
1512 sb, blkcnt, cur->emul64_blocked.emul64_sb,
1513 cur->emul64_blocked.emul64_blkcnt);
1514 rv = EINVAL;
1515 break;
1516 }
1517 return (rv);
1518 }
1519
1520 static emul64_nowrite_t *
emul64_find_nowrite(emul64_tgt_t * tgt,diskaddr_t sb,size_t blkcnt,emul64_rng_overlap_t * overlap,emul64_nowrite_t *** prevp)1521 emul64_find_nowrite(emul64_tgt_t *tgt, diskaddr_t sb, size_t blkcnt,
1522 emul64_rng_overlap_t *overlap, emul64_nowrite_t ***prevp)
1523 {
1524 emul64_nowrite_t *cur;
1525 emul64_nowrite_t **prev;
1526
1527 /* Find spot in list */
1528 *overlap = O_NONE;
1529 prev = &tgt->emul64_tgt_nowrite;
1530 cur = tgt->emul64_tgt_nowrite;
1531 while (cur != NULL) {
1532 *overlap = emul64_overlap(&cur->emul64_blocked, sb, blkcnt);
1533 if (*overlap != O_NONE)
1534 break;
1535 prev = &cur->emul64_nwnext;
1536 cur = cur->emul64_nwnext;
1537 }
1538
1539 *prevp = prev;
1540 return (cur);
1541 }
1542
1543 static emul64_nowrite_t *
emul64_nowrite_alloc(emul64_range_t * range)1544 emul64_nowrite_alloc(emul64_range_t *range)
1545 {
1546 emul64_nowrite_t *nw;
1547
1548 nw = kmem_zalloc(sizeof (*nw), KM_SLEEP);
1549 bcopy((void *) range,
1550 (void *) &nw->emul64_blocked,
1551 sizeof (nw->emul64_blocked));
1552 return (nw);
1553 }
1554
1555 static void
emul64_nowrite_free(emul64_nowrite_t * nw)1556 emul64_nowrite_free(emul64_nowrite_t *nw)
1557 {
1558 kmem_free((void *) nw, sizeof (*nw));
1559 }
1560
1561 emul64_rng_overlap_t
emul64_overlap(emul64_range_t * rng,diskaddr_t sb,size_t cnt)1562 emul64_overlap(emul64_range_t *rng, diskaddr_t sb, size_t cnt)
1563 {
1564
1565 if (rng->emul64_sb >= sb + cnt)
1566 return (O_NONE);
1567 if (rng->emul64_sb + rng->emul64_blkcnt <= sb)
1568 return (O_NONE);
1569 if ((rng->emul64_sb == sb) && (rng->emul64_blkcnt == cnt))
1570 return (O_SAME);
1571 if ((sb >= rng->emul64_sb) &&
1572 ((sb + cnt) <= (rng->emul64_sb + rng->emul64_blkcnt))) {
1573 return (O_SUBSET);
1574 }
1575 return (O_OVERLAP);
1576 }
1577
1578 #include <sys/varargs.h>
1579
1580 /*
1581 * Error logging, printing, and debug print routines
1582 */
1583
1584 /*VARARGS3*/
1585 static void
emul64_i_log(struct emul64 * emul64,int level,char * fmt,...)1586 emul64_i_log(struct emul64 *emul64, int level, char *fmt, ...)
1587 {
1588 char buf[256];
1589 va_list ap;
1590
1591 va_start(ap, fmt);
1592 (void) vsnprintf(buf, sizeof (buf), fmt, ap);
1593 va_end(ap);
1594
1595 scsi_log(emul64 ? emul64->emul64_dip : NULL,
1596 "emul64", level, "%s\n", buf);
1597 }
1598
1599
1600 #ifdef EMUL64DEBUG
1601
1602 static void
emul64_debug_dump_cdb(struct scsi_address * ap,struct scsi_pkt * pkt)1603 emul64_debug_dump_cdb(struct scsi_address *ap, struct scsi_pkt *pkt)
1604 {
1605 static char hex[] = "0123456789abcdef";
1606 struct emul64 *emul64 = ADDR2EMUL64(ap);
1607 struct emul64_cmd *sp = PKT2CMD(pkt);
1608 uint8_t *cdb = pkt->pkt_cdbp;
1609 char buf[256];
1610 char *p;
1611 int i;
1612
1613 (void) snprintf(buf, sizeof (buf), "emul64%d: <%d,%d> ",
1614 ddi_get_instance(emul64->emul64_dip),
1615 ap->a_target, ap->a_lun);
1616
1617 p = buf + strlen(buf);
1618
1619 *p++ = '[';
1620 for (i = 0; i < sp->cmd_cdblen; i++, cdb++) {
1621 if (i != 0)
1622 *p++ = ' ';
1623 *p++ = hex[(*cdb >> 4) & 0x0f];
1624 *p++ = hex[*cdb & 0x0f];
1625 }
1626 *p++ = ']';
1627 *p++ = '\n';
1628 *p = '\0';
1629
1630 cmn_err(CE_CONT, buf);
1631 }
1632 #endif /* EMUL64DEBUG */
1633