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slirp: Remove unused return value of tftp_send_next_block
[qemu/agraf.git] / hw / scsi-bus.c
blob4981a024365bc7646f60fea6f21225f9897303ed
1 #include "hw.h"
2 #include "qemu-error.h"
3 #include "scsi.h"
4 #include "scsi-defs.h"
5 #include "qdev.h"
6 #include "blockdev.h"
7 #include "trace.h"
8 #include "dma.h"
9
10 static char *scsibus_get_dev_path(DeviceState *dev);
11 static char *scsibus_get_fw_dev_path(DeviceState *dev);
12 static int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf);
13 static void scsi_req_dequeue(SCSIRequest *req);
14
15 static Property scsi_props[] = {
16 DEFINE_PROP_UINT32("channel", SCSIDevice, channel, 0),
17 DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1),
18 DEFINE_PROP_UINT32("lun", SCSIDevice, lun, -1),
19 DEFINE_PROP_END_OF_LIST(),
20 };
21
22 static void scsi_bus_class_init(ObjectClass *klass, void *data)
23 {
24 BusClass *k = BUS_CLASS(klass);
25
26 k->get_dev_path = scsibus_get_dev_path;
27 k->get_fw_dev_path = scsibus_get_fw_dev_path;
28 }
29
30 static const TypeInfo scsi_bus_info = {
31 .name = TYPE_SCSI_BUS,
32 .parent = TYPE_BUS,
33 .instance_size = sizeof(SCSIBus),
34 .class_init = scsi_bus_class_init,
35 };
36 static int next_scsi_bus;
37
38 static int scsi_device_init(SCSIDevice *s)
39 {
40 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
41 if (sc->init) {
42 return sc->init(s);
43 }
44 return 0;
45 }
46
47 static void scsi_device_destroy(SCSIDevice *s)
48 {
49 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
50 if (sc->destroy) {
51 sc->destroy(s);
52 }
53 }
54
55 static SCSIRequest *scsi_device_alloc_req(SCSIDevice *s, uint32_t tag, uint32_t lun,
56 uint8_t *buf, void *hba_private)
57 {
58 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
59 if (sc->alloc_req) {
60 return sc->alloc_req(s, tag, lun, buf, hba_private);
61 }
62
63 return NULL;
64 }
65
66 static void scsi_device_unit_attention_reported(SCSIDevice *s)
67 {
68 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
69 if (sc->unit_attention_reported) {
70 sc->unit_attention_reported(s);
71 }
72 }
73
74 /* Create a scsi bus, and attach devices to it. */
75 void scsi_bus_new(SCSIBus *bus, DeviceState *host, const SCSIBusInfo *info)
76 {
77 qbus_create_inplace(&bus->qbus, TYPE_SCSI_BUS, host, NULL);
78 bus->busnr = next_scsi_bus++;
79 bus->info = info;
80 bus->qbus.allow_hotplug = 1;
81 }
82
83 static void scsi_dma_restart_bh(void *opaque)
84 {
85 SCSIDevice *s = opaque;
86 SCSIRequest *req, *next;
87
88 qemu_bh_delete(s->bh);
89 s->bh = NULL;
90
91 QTAILQ_FOREACH_SAFE(req, &s->requests, next, next) {
92 scsi_req_ref(req);
93 if (req->retry) {
94 req->retry = false;
95 switch (req->cmd.mode) {
96 case SCSI_XFER_FROM_DEV:
97 case SCSI_XFER_TO_DEV:
98 scsi_req_continue(req);
99 break;
100 case SCSI_XFER_NONE:
101 assert(!req->sg);
102 scsi_req_dequeue(req);
103 scsi_req_enqueue(req);
104 break;
105 }
106 }
107 scsi_req_unref(req);
108 }
109 }
110
111 void scsi_req_retry(SCSIRequest *req)
112 {
113 /* No need to save a reference, because scsi_dma_restart_bh just
114 * looks at the request list. */
115 req->retry = true;
116 }
117
118 static void scsi_dma_restart_cb(void *opaque, int running, RunState state)
119 {
120 SCSIDevice *s = opaque;
121
122 if (!running) {
123 return;
124 }
125 if (!s->bh) {
126 s->bh = qemu_bh_new(scsi_dma_restart_bh, s);
127 qemu_bh_schedule(s->bh);
128 }
129 }
130
131 static int scsi_qdev_init(DeviceState *qdev)
132 {
133 SCSIDevice *dev = SCSI_DEVICE(qdev);
134 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
135 SCSIDevice *d;
136 int rc = -1;
137
138 if (dev->channel > bus->info->max_channel) {
139 error_report("bad scsi channel id: %d", dev->channel);
140 goto err;
141 }
142 if (dev->id != -1 && dev->id > bus->info->max_target) {
143 error_report("bad scsi device id: %d", dev->id);
144 goto err;
145 }
146 if (dev->lun != -1 && dev->lun > bus->info->max_lun) {
147 error_report("bad scsi device lun: %d", dev->lun);
148 goto err;
149 }
150
151 if (dev->id == -1) {
152 int id = -1;
153 if (dev->lun == -1) {
154 dev->lun = 0;
155 }
156 do {
157 d = scsi_device_find(bus, dev->channel, ++id, dev->lun);
158 } while (d && d->lun == dev->lun && id < bus->info->max_target);
159 if (d && d->lun == dev->lun) {
160 error_report("no free target");
161 goto err;
162 }
163 dev->id = id;
164 } else if (dev->lun == -1) {
165 int lun = -1;
166 do {
167 d = scsi_device_find(bus, dev->channel, dev->id, ++lun);
168 } while (d && d->lun == lun && lun < bus->info->max_lun);
169 if (d && d->lun == lun) {
170 error_report("no free lun");
171 goto err;
172 }
173 dev->lun = lun;
174 } else {
175 d = scsi_device_find(bus, dev->channel, dev->id, dev->lun);
176 assert(d);
177 if (d->lun == dev->lun && dev != d) {
178 qdev_free(&d->qdev);
179 }
180 }
181
182 QTAILQ_INIT(&dev->requests);
183 rc = scsi_device_init(dev);
184 if (rc == 0) {
185 dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb,
186 dev);
187 }
188
189 if (bus->info->hotplug) {
190 bus->info->hotplug(bus, dev);
191 }
192
193 err:
194 return rc;
195 }
196
197 static int scsi_qdev_exit(DeviceState *qdev)
198 {
199 SCSIDevice *dev = SCSI_DEVICE(qdev);
200
201 if (dev->vmsentry) {
202 qemu_del_vm_change_state_handler(dev->vmsentry);
203 }
204 scsi_device_destroy(dev);
205 return 0;
206 }
207
208 /* handle legacy '-drive if=scsi,...' cmd line args */
209 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
210 int unit, bool removable, int bootindex)
211 {
212 const char *driver;
213 DeviceState *dev;
214
215 driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk";
216 dev = qdev_create(&bus->qbus, driver);
217 qdev_prop_set_uint32(dev, "scsi-id", unit);
218 if (bootindex >= 0) {
219 qdev_prop_set_int32(dev, "bootindex", bootindex);
220 }
221 if (object_property_find(OBJECT(dev), "removable", NULL)) {
222 qdev_prop_set_bit(dev, "removable", removable);
223 }
224 if (qdev_prop_set_drive(dev, "drive", bdrv) < 0) {
225 qdev_free(dev);
226 return NULL;
227 }
228 if (qdev_init(dev) < 0)
229 return NULL;
230 return SCSI_DEVICE(dev);
231 }
232
233 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
234 {
235 Location loc;
236 DriveInfo *dinfo;
237 int res = 0, unit;
238
239 loc_push_none(&loc);
240 for (unit = 0; unit <= bus->info->max_target; unit++) {
241 dinfo = drive_get(IF_SCSI, bus->busnr, unit);
242 if (dinfo == NULL) {
243 continue;
244 }
245 qemu_opts_loc_restore(dinfo->opts);
246 if (!scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit, false, -1)) {
247 res = -1;
248 break;
249 }
250 }
251 loc_pop(&loc);
252 return res;
253 }
254
255 static int32_t scsi_invalid_field(SCSIRequest *req, uint8_t *buf)
256 {
257 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD));
258 scsi_req_complete(req, CHECK_CONDITION);
259 return 0;
260 }
261
262 static const struct SCSIReqOps reqops_invalid_field = {
263 .size = sizeof(SCSIRequest),
264 .send_command = scsi_invalid_field
265 };
266
267 /* SCSIReqOps implementation for invalid commands. */
268
269 static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf)
270 {
271 scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE));
272 scsi_req_complete(req, CHECK_CONDITION);
273 return 0;
274 }
275
276 static const struct SCSIReqOps reqops_invalid_opcode = {
277 .size = sizeof(SCSIRequest),
278 .send_command = scsi_invalid_command
279 };
280
281 /* SCSIReqOps implementation for unit attention conditions. */
282
283 static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf)
284 {
285 if (req->dev && req->dev->unit_attention.key == UNIT_ATTENTION) {
286 scsi_req_build_sense(req, req->dev->unit_attention);
287 } else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
288 scsi_req_build_sense(req, req->bus->unit_attention);
289 }
290 scsi_req_complete(req, CHECK_CONDITION);
291 return 0;
292 }
293
294 static const struct SCSIReqOps reqops_unit_attention = {
295 .size = sizeof(SCSIRequest),
296 .send_command = scsi_unit_attention
297 };
298
299 /* SCSIReqOps implementation for REPORT LUNS and for commands sent to
300 an invalid LUN. */
301
302 typedef struct SCSITargetReq SCSITargetReq;
303
304 struct SCSITargetReq {
305 SCSIRequest req;
306 int len;
307 uint8_t buf[2056];
308 };
309
310 static void store_lun(uint8_t *outbuf, int lun)
311 {
312 if (lun < 256) {
313 outbuf[1] = lun;
314 return;
315 }
316 outbuf[1] = (lun & 255);
317 outbuf[0] = (lun >> 8) | 0x40;
318 }
319
320 static bool scsi_target_emulate_report_luns(SCSITargetReq *r)
321 {
322 BusChild *kid;
323 int i, len, n;
324 int channel, id;
325 bool found_lun0;
326
327 if (r->req.cmd.xfer < 16) {
328 return false;
329 }
330 if (r->req.cmd.buf[2] > 2) {
331 return false;
332 }
333 channel = r->req.dev->channel;
334 id = r->req.dev->id;
335 found_lun0 = false;
336 n = 0;
337 QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) {
338 DeviceState *qdev = kid->child;
339 SCSIDevice *dev = SCSI_DEVICE(qdev);
340
341 if (dev->channel == channel && dev->id == id) {
342 if (dev->lun == 0) {
343 found_lun0 = true;
344 }
345 n += 8;
346 }
347 }
348 if (!found_lun0) {
349 n += 8;
350 }
351 len = MIN(n + 8, r->req.cmd.xfer & ~7);
352 if (len > sizeof(r->buf)) {
353 /* TODO: > 256 LUNs? */
354 return false;
355 }
356
357 memset(r->buf, 0, len);
358 stl_be_p(&r->buf, n);
359 i = found_lun0 ? 8 : 16;
360 QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) {
361 DeviceState *qdev = kid->child;
362 SCSIDevice *dev = SCSI_DEVICE(qdev);
363
364 if (dev->channel == channel && dev->id == id) {
365 store_lun(&r->buf[i], dev->lun);
366 i += 8;
367 }
368 }
369 assert(i == n + 8);
370 r->len = len;
371 return true;
372 }
373
374 static bool scsi_target_emulate_inquiry(SCSITargetReq *r)
375 {
376 assert(r->req.dev->lun != r->req.lun);
377 if (r->req.cmd.buf[1] & 0x2) {
378 /* Command support data - optional, not implemented */
379 return false;
380 }
381
382 if (r->req.cmd.buf[1] & 0x1) {
383 /* Vital product data */
384 uint8_t page_code = r->req.cmd.buf[2];
385 r->buf[r->len++] = page_code ; /* this page */
386 r->buf[r->len++] = 0x00;
387
388 switch (page_code) {
389 case 0x00: /* Supported page codes, mandatory */
390 {
391 int pages;
392 pages = r->len++;
393 r->buf[r->len++] = 0x00; /* list of supported pages (this page) */
394 r->buf[pages] = r->len - pages - 1; /* number of pages */
395 break;
396 }
397 default:
398 return false;
399 }
400 /* done with EVPD */
401 assert(r->len < sizeof(r->buf));
402 r->len = MIN(r->req.cmd.xfer, r->len);
403 return true;
404 }
405
406 /* Standard INQUIRY data */
407 if (r->req.cmd.buf[2] != 0) {
408 return false;
409 }
410
411 /* PAGE CODE == 0 */
412 r->len = MIN(r->req.cmd.xfer, 36);
413 memset(r->buf, 0, r->len);
414 if (r->req.lun != 0) {
415 r->buf[0] = TYPE_NO_LUN;
416 } else {
417 r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE;
418 r->buf[2] = 5; /* Version */
419 r->buf[3] = 2 | 0x10; /* HiSup, response data format */
420 r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */
421 r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ. */
422 memcpy(&r->buf[8], "QEMU ", 8);
423 memcpy(&r->buf[16], "QEMU TARGET ", 16);
424 pstrcpy((char *) &r->buf[32], 4, qemu_get_version());
425 }
426 return true;
427 }
428
429 static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
430 {
431 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
432
433 switch (buf[0]) {
434 case REPORT_LUNS:
435 if (!scsi_target_emulate_report_luns(r)) {
436 goto illegal_request;
437 }
438 break;
439 case INQUIRY:
440 if (!scsi_target_emulate_inquiry(r)) {
441 goto illegal_request;
442 }
443 break;
444 case REQUEST_SENSE:
445 r->len = scsi_device_get_sense(r->req.dev, r->buf,
446 MIN(req->cmd.xfer, sizeof r->buf),
447 (req->cmd.buf[1] & 1) == 0);
448 if (r->req.dev->sense_is_ua) {
449 scsi_device_unit_attention_reported(req->dev);
450 r->req.dev->sense_len = 0;
451 r->req.dev->sense_is_ua = false;
452 }
453 break;
454 default:
455 scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED));
456 scsi_req_complete(req, CHECK_CONDITION);
457 return 0;
458 illegal_request:
459 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD));
460 scsi_req_complete(req, CHECK_CONDITION);
461 return 0;
462 }
463
464 if (!r->len) {
465 scsi_req_complete(req, GOOD);
466 }
467 return r->len;
468 }
469
470 static void scsi_target_read_data(SCSIRequest *req)
471 {
472 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
473 uint32_t n;
474
475 n = r->len;
476 if (n > 0) {
477 r->len = 0;
478 scsi_req_data(&r->req, n);
479 } else {
480 scsi_req_complete(&r->req, GOOD);
481 }
482 }
483
484 static uint8_t *scsi_target_get_buf(SCSIRequest *req)
485 {
486 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
487
488 return r->buf;
489 }
490
491 static const struct SCSIReqOps reqops_target_command = {
492 .size = sizeof(SCSITargetReq),
493 .send_command = scsi_target_send_command,
494 .read_data = scsi_target_read_data,
495 .get_buf = scsi_target_get_buf,
496 };
497
498
499 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
500 uint32_t tag, uint32_t lun, void *hba_private)
501 {
502 SCSIRequest *req;
503
504 req = g_malloc0(reqops->size);
505 req->refcount = 1;
506 req->bus = scsi_bus_from_device(d);
507 req->dev = d;
508 req->tag = tag;
509 req->lun = lun;
510 req->hba_private = hba_private;
511 req->status = -1;
512 req->sense_len = 0;
513 req->ops = reqops;
514 trace_scsi_req_alloc(req->dev->id, req->lun, req->tag);
515 return req;
516 }
517
518 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
519 uint8_t *buf, void *hba_private)
520 {
521 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
522 SCSIRequest *req;
523 SCSICommand cmd;
524
525 if (scsi_req_parse(&cmd, d, buf) != 0) {
526 trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]);
527 req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private);
528 } else {
529 trace_scsi_req_parsed(d->id, lun, tag, buf[0],
530 cmd.mode, cmd.xfer);
531 if (cmd.lba != -1) {
532 trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0],
533 cmd.lba);
534 }
535
536 if (cmd.xfer > INT32_MAX) {
537 req = scsi_req_alloc(&reqops_invalid_field, d, tag, lun, hba_private);
538 } else if ((d->unit_attention.key == UNIT_ATTENTION ||
539 bus->unit_attention.key == UNIT_ATTENTION) &&
540 (buf[0] != INQUIRY &&
541 buf[0] != REPORT_LUNS &&
542 buf[0] != GET_CONFIGURATION &&
543 buf[0] != GET_EVENT_STATUS_NOTIFICATION &&
544
545 /*
546 * If we already have a pending unit attention condition,
547 * report this one before triggering another one.
548 */
549 !(buf[0] == REQUEST_SENSE && d->sense_is_ua))) {
550 req = scsi_req_alloc(&reqops_unit_attention, d, tag, lun,
551 hba_private);
552 } else if (lun != d->lun ||
553 buf[0] == REPORT_LUNS ||
554 (buf[0] == REQUEST_SENSE && d->sense_len)) {
555 req = scsi_req_alloc(&reqops_target_command, d, tag, lun,
556 hba_private);
557 } else {
558 req = scsi_device_alloc_req(d, tag, lun, buf, hba_private);
559 }
560 }
561
562 req->cmd = cmd;
563 req->resid = req->cmd.xfer;
564
565 switch (buf[0]) {
566 case INQUIRY:
567 trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]);
568 break;
569 case TEST_UNIT_READY:
570 trace_scsi_test_unit_ready(d->id, lun, tag);
571 break;
572 case REPORT_LUNS:
573 trace_scsi_report_luns(d->id, lun, tag);
574 break;
575 case REQUEST_SENSE:
576 trace_scsi_request_sense(d->id, lun, tag);
577 break;
578 default:
579 break;
580 }
581
582 return req;
583 }
584
585 uint8_t *scsi_req_get_buf(SCSIRequest *req)
586 {
587 return req->ops->get_buf(req);
588 }
589
590 static void scsi_clear_unit_attention(SCSIRequest *req)
591 {
592 SCSISense *ua;
593 if (req->dev->unit_attention.key != UNIT_ATTENTION &&
594 req->bus->unit_attention.key != UNIT_ATTENTION) {
595 return;
596 }
597
598 /*
599 * If an INQUIRY command enters the enabled command state,
600 * the device server shall [not] clear any unit attention condition;
601 * See also MMC-6, paragraphs 6.5 and 6.6.2.
602 */
603 if (req->cmd.buf[0] == INQUIRY ||
604 req->cmd.buf[0] == GET_CONFIGURATION ||
605 req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) {
606 return;
607 }
608
609 if (req->dev->unit_attention.key == UNIT_ATTENTION) {
610 ua = &req->dev->unit_attention;
611 } else {
612 ua = &req->bus->unit_attention;
613 }
614
615 /*
616 * If a REPORT LUNS command enters the enabled command state, [...]
617 * the device server shall clear any pending unit attention condition
618 * with an additional sense code of REPORTED LUNS DATA HAS CHANGED.
619 */
620 if (req->cmd.buf[0] == REPORT_LUNS &&
621 !(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc &&
622 ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) {
623 return;
624 }
625
626 *ua = SENSE_CODE(NO_SENSE);
627 }
628
629 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len)
630 {
631 int ret;
632
633 assert(len >= 14);
634 if (!req->sense_len) {
635 return 0;
636 }
637
638 ret = scsi_build_sense(req->sense, req->sense_len, buf, len, true);
639
640 /*
641 * FIXME: clearing unit attention conditions upon autosense should be done
642 * only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b
643 * (SAM-5, 5.14).
644 *
645 * We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and
646 * 10b for HBAs that do not support it (do not call scsi_req_get_sense).
647 * Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b.
648 */
649 if (req->dev->sense_is_ua) {
650 scsi_device_unit_attention_reported(req->dev);
651 req->dev->sense_len = 0;
652 req->dev->sense_is_ua = false;
653 }
654 return ret;
655 }
656
657 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed)
658 {
659 return scsi_build_sense(dev->sense, dev->sense_len, buf, len, fixed);
660 }
661
662 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense)
663 {
664 trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag,
665 sense.key, sense.asc, sense.ascq);
666 memset(req->sense, 0, 18);
667 req->sense[0] = 0x70;
668 req->sense[2] = sense.key;
669 req->sense[7] = 10;
670 req->sense[12] = sense.asc;
671 req->sense[13] = sense.ascq;
672 req->sense_len = 18;
673 }
674
675 static void scsi_req_enqueue_internal(SCSIRequest *req)
676 {
677 assert(!req->enqueued);
678 scsi_req_ref(req);
679 if (req->bus->info->get_sg_list) {
680 req->sg = req->bus->info->get_sg_list(req);
681 } else {
682 req->sg = NULL;
683 }
684 req->enqueued = true;
685 QTAILQ_INSERT_TAIL(&req->dev->requests, req, next);
686 }
687
688 int32_t scsi_req_enqueue(SCSIRequest *req)
689 {
690 int32_t rc;
691
692 assert(!req->retry);
693 scsi_req_enqueue_internal(req);
694 scsi_req_ref(req);
695 rc = req->ops->send_command(req, req->cmd.buf);
696 scsi_req_unref(req);
697 return rc;
698 }
699
700 static void scsi_req_dequeue(SCSIRequest *req)
701 {
702 trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag);
703 req->retry = false;
704 if (req->enqueued) {
705 QTAILQ_REMOVE(&req->dev->requests, req, next);
706 req->enqueued = false;
707 scsi_req_unref(req);
708 }
709 }
710
711 static int scsi_get_performance_length(int num_desc, int type, int data_type)
712 {
713 /* MMC-6, paragraph 6.7. */
714 switch (type) {
715 case 0:
716 if ((data_type & 3) == 0) {
717 /* Each descriptor is as in Table 295 - Nominal performance. */
718 return 16 * num_desc + 8;
719 } else {
720 /* Each descriptor is as in Table 296 - Exceptions. */
721 return 6 * num_desc + 8;
722 }
723 case 1:
724 case 4:
725 case 5:
726 return 8 * num_desc + 8;
727 case 2:
728 return 2048 * num_desc + 8;
729 case 3:
730 return 16 * num_desc + 8;
731 default:
732 return 8;
733 }
734 }
735
736 static int ata_passthrough_xfer_unit(SCSIDevice *dev, uint8_t *buf)
737 {
738 int byte_block = (buf[2] >> 2) & 0x1;
739 int type = (buf[2] >> 4) & 0x1;
740 int xfer_unit;
741
742 if (byte_block) {
743 if (type) {
744 xfer_unit = dev->blocksize;
745 } else {
746 xfer_unit = 512;
747 }
748 } else {
749 xfer_unit = 1;
750 }
751
752 return xfer_unit;
753 }
754
755 static int ata_passthrough_12_xfer_size(SCSIDevice *dev, uint8_t *buf)
756 {
757 int length = buf[2] & 0x3;
758 int xfer;
759 int unit = ata_passthrough_xfer_unit(dev, buf);
760
761 switch (length) {
762 case 0:
763 case 3: /* USB-specific. */
764 default:
765 xfer = 0;
766 break;
767 case 1:
768 xfer = buf[3];
769 break;
770 case 2:
771 xfer = buf[4];
772 break;
773 }
774
775 return xfer * unit;
776 }
777
778 static int ata_passthrough_16_xfer_size(SCSIDevice *dev, uint8_t *buf)
779 {
780 int extend = buf[1] & 0x1;
781 int length = buf[2] & 0x3;
782 int xfer;
783 int unit = ata_passthrough_xfer_unit(dev, buf);
784
785 switch (length) {
786 case 0:
787 case 3: /* USB-specific. */
788 default:
789 xfer = 0;
790 break;
791 case 1:
792 xfer = buf[4];
793 xfer |= (extend ? buf[3] << 8 : 0);
794 break;
795 case 2:
796 xfer = buf[6];
797 xfer |= (extend ? buf[5] << 8 : 0);
798 break;
799 }
800
801 return xfer * unit;
802 }
803
804 static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
805 {
806 switch (buf[0] >> 5) {
807 case 0:
808 cmd->xfer = buf[4];
809 break;
810 case 1:
811 case 2:
812 cmd->xfer = lduw_be_p(&buf[7]);
813 break;
814 case 4:
815 cmd->xfer = ldl_be_p(&buf[10]) & 0xffffffffULL;
816 break;
817 case 5:
818 cmd->xfer = ldl_be_p(&buf[6]) & 0xffffffffULL;
819 break;
820 default:
821 return -1;
822 }
823
824 switch (buf[0]) {
825 case TEST_UNIT_READY:
826 case REWIND:
827 case START_STOP:
828 case SET_CAPACITY:
829 case WRITE_FILEMARKS:
830 case WRITE_FILEMARKS_16:
831 case SPACE:
832 case RESERVE:
833 case RELEASE:
834 case ERASE:
835 case ALLOW_MEDIUM_REMOVAL:
836 case VERIFY_10:
837 case SEEK_10:
838 case SYNCHRONIZE_CACHE:
839 case SYNCHRONIZE_CACHE_16:
840 case LOCATE_16:
841 case LOCK_UNLOCK_CACHE:
842 case SET_CD_SPEED:
843 case SET_LIMITS:
844 case WRITE_LONG_10:
845 case UPDATE_BLOCK:
846 case RESERVE_TRACK:
847 case SET_READ_AHEAD:
848 case PRE_FETCH:
849 case PRE_FETCH_16:
850 case ALLOW_OVERWRITE:
851 cmd->xfer = 0;
852 break;
853 case MODE_SENSE:
854 break;
855 case WRITE_SAME_10:
856 case WRITE_SAME_16:
857 cmd->xfer = dev->blocksize;
858 break;
859 case READ_CAPACITY_10:
860 cmd->xfer = 8;
861 break;
862 case READ_BLOCK_LIMITS:
863 cmd->xfer = 6;
864 break;
865 case SEND_VOLUME_TAG:
866 /* GPCMD_SET_STREAMING from multimedia commands. */
867 if (dev->type == TYPE_ROM) {
868 cmd->xfer = buf[10] | (buf[9] << 8);
869 } else {
870 cmd->xfer = buf[9] | (buf[8] << 8);
871 }
872 break;
873 case WRITE_6:
874 /* length 0 means 256 blocks */
875 if (cmd->xfer == 0) {
876 cmd->xfer = 256;
877 }
878 case WRITE_10:
879 case WRITE_VERIFY_10:
880 case WRITE_12:
881 case WRITE_VERIFY_12:
882 case WRITE_16:
883 case WRITE_VERIFY_16:
884 cmd->xfer *= dev->blocksize;
885 break;
886 case READ_6:
887 case READ_REVERSE:
888 /* length 0 means 256 blocks */
889 if (cmd->xfer == 0) {
890 cmd->xfer = 256;
891 }
892 case READ_10:
893 case RECOVER_BUFFERED_DATA:
894 case READ_12:
895 case READ_16:
896 cmd->xfer *= dev->blocksize;
897 break;
898 case FORMAT_UNIT:
899 /* MMC mandates the parameter list to be 12-bytes long. Parameters
900 * for block devices are restricted to the header right now. */
901 if (dev->type == TYPE_ROM && (buf[1] & 16)) {
902 cmd->xfer = 12;
903 } else {
904 cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4);
905 }
906 break;
907 case INQUIRY:
908 case RECEIVE_DIAGNOSTIC:
909 case SEND_DIAGNOSTIC:
910 cmd->xfer = buf[4] | (buf[3] << 8);
911 break;
912 case READ_CD:
913 case READ_BUFFER:
914 case WRITE_BUFFER:
915 case SEND_CUE_SHEET:
916 cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16);
917 break;
918 case PERSISTENT_RESERVE_OUT:
919 cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL;
920 break;
921 case ERASE_12:
922 if (dev->type == TYPE_ROM) {
923 /* MMC command GET PERFORMANCE. */
924 cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8),
925 buf[10], buf[1] & 0x1f);
926 }
927 break;
928 case MECHANISM_STATUS:
929 case READ_DVD_STRUCTURE:
930 case SEND_DVD_STRUCTURE:
931 case MAINTENANCE_OUT:
932 case MAINTENANCE_IN:
933 if (dev->type == TYPE_ROM) {
934 /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */
935 cmd->xfer = buf[9] | (buf[8] << 8);
936 }
937 break;
938 case ATA_PASSTHROUGH_12:
939 if (dev->type == TYPE_ROM) {
940 /* BLANK command of MMC */
941 cmd->xfer = 0;
942 } else {
943 cmd->xfer = ata_passthrough_12_xfer_size(dev, buf);
944 }
945 break;
946 case ATA_PASSTHROUGH_16:
947 cmd->xfer = ata_passthrough_16_xfer_size(dev, buf);
948 break;
949 }
950 return 0;
951 }
952
953 static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
954 {
955 switch (buf[0]) {
956 /* stream commands */
957 case ERASE_12:
958 case ERASE_16:
959 cmd->xfer = 0;
960 break;
961 case READ_6:
962 case READ_REVERSE:
963 case RECOVER_BUFFERED_DATA:
964 case WRITE_6:
965 cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16);
966 if (buf[1] & 0x01) { /* fixed */
967 cmd->xfer *= dev->blocksize;
968 }
969 break;
970 case READ_16:
971 case READ_REVERSE_16:
972 case VERIFY_16:
973 case WRITE_16:
974 cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16);
975 if (buf[1] & 0x01) { /* fixed */
976 cmd->xfer *= dev->blocksize;
977 }
978 break;
979 case REWIND:
980 case LOAD_UNLOAD:
981 cmd->xfer = 0;
982 break;
983 case SPACE_16:
984 cmd->xfer = buf[13] | (buf[12] << 8);
985 break;
986 case READ_POSITION:
987 switch (buf[1] & 0x1f) /* operation code */ {
988 case SHORT_FORM_BLOCK_ID:
989 case SHORT_FORM_VENDOR_SPECIFIC:
990 cmd->xfer = 20;
991 break;
992 case LONG_FORM:
993 cmd->xfer = 32;
994 break;
995 case EXTENDED_FORM:
996 cmd->xfer = buf[8] | (buf[7] << 8);
997 break;
998 default:
999 return -1;
1000 }
1001
1002 break;
1003 case FORMAT_UNIT:
1004 cmd->xfer = buf[4] | (buf[3] << 8);
1005 break;
1006 /* generic commands */
1007 default:
1008 return scsi_req_length(cmd, dev, buf);
1009 }
1010 return 0;
1011 }
1012
1013 static int scsi_req_medium_changer_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
1014 {
1015 switch (buf[0]) {
1016 /* medium changer commands */
1017 case EXCHANGE_MEDIUM:
1018 case INITIALIZE_ELEMENT_STATUS:
1019 case INITIALIZE_ELEMENT_STATUS_WITH_RANGE:
1020 case MOVE_MEDIUM:
1021 case POSITION_TO_ELEMENT:
1022 cmd->xfer = 0;
1023 break;
1024 case READ_ELEMENT_STATUS:
1025 cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16);
1026 break;
1027
1028 /* generic commands */
1029 default:
1030 return scsi_req_length(cmd, dev, buf);
1031 }
1032 return 0;
1033 }
1034
1035
1036 static void scsi_cmd_xfer_mode(SCSICommand *cmd)
1037 {
1038 if (!cmd->xfer) {
1039 cmd->mode = SCSI_XFER_NONE;
1040 return;
1041 }
1042 switch (cmd->buf[0]) {
1043 case WRITE_6:
1044 case WRITE_10:
1045 case WRITE_VERIFY_10:
1046 case WRITE_12:
1047 case WRITE_VERIFY_12:
1048 case WRITE_16:
1049 case WRITE_VERIFY_16:
1050 case COPY:
1051 case COPY_VERIFY:
1052 case COMPARE:
1053 case CHANGE_DEFINITION:
1054 case LOG_SELECT:
1055 case MODE_SELECT:
1056 case MODE_SELECT_10:
1057 case SEND_DIAGNOSTIC:
1058 case WRITE_BUFFER:
1059 case FORMAT_UNIT:
1060 case REASSIGN_BLOCKS:
1061 case SEARCH_EQUAL:
1062 case SEARCH_HIGH:
1063 case SEARCH_LOW:
1064 case UPDATE_BLOCK:
1065 case WRITE_LONG_10:
1066 case WRITE_SAME_10:
1067 case WRITE_SAME_16:
1068 case UNMAP:
1069 case SEARCH_HIGH_12:
1070 case SEARCH_EQUAL_12:
1071 case SEARCH_LOW_12:
1072 case MEDIUM_SCAN:
1073 case SEND_VOLUME_TAG:
1074 case SEND_CUE_SHEET:
1075 case SEND_DVD_STRUCTURE:
1076 case PERSISTENT_RESERVE_OUT:
1077 case MAINTENANCE_OUT:
1078 cmd->mode = SCSI_XFER_TO_DEV;
1079 break;
1080 case ATA_PASSTHROUGH_12:
1081 case ATA_PASSTHROUGH_16:
1082 /* T_DIR */
1083 cmd->mode = (cmd->buf[2] & 0x8) ?
1084 SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV;
1085 break;
1086 default:
1087 cmd->mode = SCSI_XFER_FROM_DEV;
1088 break;
1089 }
1090 }
1091
1092 static uint64_t scsi_cmd_lba(SCSICommand *cmd)
1093 {
1094 uint8_t *buf = cmd->buf;
1095 uint64_t lba;
1096
1097 switch (buf[0] >> 5) {
1098 case 0:
1099 lba = ldl_be_p(&buf[0]) & 0x1fffff;
1100 break;
1101 case 1:
1102 case 2:
1103 case 5:
1104 lba = ldl_be_p(&buf[2]) & 0xffffffffULL;
1105 break;
1106 case 4:
1107 lba = ldq_be_p(&buf[2]);
1108 break;
1109 default:
1110 lba = -1;
1111
1112 }
1113 return lba;
1114 }
1115
1116 int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
1117 {
1118 int rc;
1119
1120 switch (buf[0] >> 5) {
1121 case 0:
1122 cmd->len = 6;
1123 break;
1124 case 1:
1125 case 2:
1126 cmd->len = 10;
1127 break;
1128 case 4:
1129 cmd->len = 16;
1130 break;
1131 case 5:
1132 cmd->len = 12;
1133 break;
1134 default:
1135 return -1;
1136 }
1137
1138 switch (dev->type) {
1139 case TYPE_TAPE:
1140 rc = scsi_req_stream_length(cmd, dev, buf);
1141 break;
1142 case TYPE_MEDIUM_CHANGER:
1143 rc = scsi_req_medium_changer_length(cmd, dev, buf);
1144 break;
1145 default:
1146 rc = scsi_req_length(cmd, dev, buf);
1147 break;
1148 }
1149
1150 if (rc != 0)
1151 return rc;
1152
1153 memcpy(cmd->buf, buf, cmd->len);
1154 scsi_cmd_xfer_mode(cmd);
1155 cmd->lba = scsi_cmd_lba(cmd);
1156 return 0;
1157 }
1158
1159 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense)
1160 {
1161 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
1162
1163 scsi_device_set_ua(dev, sense);
1164 if (bus->info->change) {
1165 bus->info->change(bus, dev, sense);
1166 }
1167 }
1168
1169 /*
1170 * Predefined sense codes
1171 */
1172
1173 /* No sense data available */
1174 const struct SCSISense sense_code_NO_SENSE = {
1175 .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00
1176 };
1177
1178 /* LUN not ready, Manual intervention required */
1179 const struct SCSISense sense_code_LUN_NOT_READY = {
1180 .key = NOT_READY, .asc = 0x04, .ascq = 0x03
1181 };
1182
1183 /* LUN not ready, Medium not present */
1184 const struct SCSISense sense_code_NO_MEDIUM = {
1185 .key = NOT_READY, .asc = 0x3a, .ascq = 0x00
1186 };
1187
1188 /* LUN not ready, medium removal prevented */
1189 const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = {
1190 .key = NOT_READY, .asc = 0x53, .ascq = 0x02
1191 };
1192
1193 /* Hardware error, internal target failure */
1194 const struct SCSISense sense_code_TARGET_FAILURE = {
1195 .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00
1196 };
1197
1198 /* Illegal request, invalid command operation code */
1199 const struct SCSISense sense_code_INVALID_OPCODE = {
1200 .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00
1201 };
1202
1203 /* Illegal request, LBA out of range */
1204 const struct SCSISense sense_code_LBA_OUT_OF_RANGE = {
1205 .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00
1206 };
1207
1208 /* Illegal request, Invalid field in CDB */
1209 const struct SCSISense sense_code_INVALID_FIELD = {
1210 .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00
1211 };
1212
1213 /* Illegal request, Invalid field in parameter list */
1214 const struct SCSISense sense_code_INVALID_PARAM = {
1215 .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00
1216 };
1217
1218 /* Illegal request, Parameter list length error */
1219 const struct SCSISense sense_code_INVALID_PARAM_LEN = {
1220 .key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00
1221 };
1222
1223 /* Illegal request, LUN not supported */
1224 const struct SCSISense sense_code_LUN_NOT_SUPPORTED = {
1225 .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00
1226 };
1227
1228 /* Illegal request, Saving parameters not supported */
1229 const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = {
1230 .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00
1231 };
1232
1233 /* Illegal request, Incompatible medium installed */
1234 const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = {
1235 .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00
1236 };
1237
1238 /* Illegal request, medium removal prevented */
1239 const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = {
1240 .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02
1241 };
1242
1243 /* Command aborted, I/O process terminated */
1244 const struct SCSISense sense_code_IO_ERROR = {
1245 .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06
1246 };
1247
1248 /* Command aborted, I_T Nexus loss occurred */
1249 const struct SCSISense sense_code_I_T_NEXUS_LOSS = {
1250 .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07
1251 };
1252
1253 /* Command aborted, Logical Unit failure */
1254 const struct SCSISense sense_code_LUN_FAILURE = {
1255 .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01
1256 };
1257
1258 /* Unit attention, Capacity data has changed */
1259 const struct SCSISense sense_code_CAPACITY_CHANGED = {
1260 .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09
1261 };
1262
1263 /* Unit attention, Power on, reset or bus device reset occurred */
1264 const struct SCSISense sense_code_RESET = {
1265 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00
1266 };
1267
1268 /* Unit attention, No medium */
1269 const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = {
1270 .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00
1271 };
1272
1273 /* Unit attention, Medium may have changed */
1274 const struct SCSISense sense_code_MEDIUM_CHANGED = {
1275 .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00
1276 };
1277
1278 /* Unit attention, Reported LUNs data has changed */
1279 const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = {
1280 .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e
1281 };
1282
1283 /* Unit attention, Device internal reset */
1284 const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = {
1285 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04
1286 };
1287
1288 /* Data Protection, Write Protected */
1289 const struct SCSISense sense_code_WRITE_PROTECTED = {
1290 .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00
1291 };
1292
1293 /*
1294 * scsi_build_sense
1295 *
1296 * Convert between fixed and descriptor sense buffers
1297 */
1298 int scsi_build_sense(uint8_t *in_buf, int in_len,
1299 uint8_t *buf, int len, bool fixed)
1300 {
1301 bool fixed_in;
1302 SCSISense sense;
1303 if (!fixed && len < 8) {
1304 return 0;
1305 }
1306
1307 if (in_len == 0) {
1308 sense.key = NO_SENSE;
1309 sense.asc = 0;
1310 sense.ascq = 0;
1311 } else {
1312 fixed_in = (in_buf[0] & 2) == 0;
1313
1314 if (fixed == fixed_in) {
1315 memcpy(buf, in_buf, MIN(len, in_len));
1316 return MIN(len, in_len);
1317 }
1318
1319 if (fixed_in) {
1320 sense.key = in_buf[2];
1321 sense.asc = in_buf[12];
1322 sense.ascq = in_buf[13];
1323 } else {
1324 sense.key = in_buf[1];
1325 sense.asc = in_buf[2];
1326 sense.ascq = in_buf[3];
1327 }
1328 }
1329
1330 memset(buf, 0, len);
1331 if (fixed) {
1332 /* Return fixed format sense buffer */
1333 buf[0] = 0x70;
1334 buf[2] = sense.key;
1335 buf[7] = 10;
1336 buf[12] = sense.asc;
1337 buf[13] = sense.ascq;
1338 return MIN(len, 18);
1339 } else {
1340 /* Return descriptor format sense buffer */
1341 buf[0] = 0x72;
1342 buf[1] = sense.key;
1343 buf[2] = sense.asc;
1344 buf[3] = sense.ascq;
1345 return 8;
1346 }
1347 }
1348
1349 static const char *scsi_command_name(uint8_t cmd)
1350 {
1351 static const char *names[] = {
1352 [ TEST_UNIT_READY ] = "TEST_UNIT_READY",
1353 [ REWIND ] = "REWIND",
1354 [ REQUEST_SENSE ] = "REQUEST_SENSE",
1355 [ FORMAT_UNIT ] = "FORMAT_UNIT",
1356 [ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS",
1357 [ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS",
1358 /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */
1359 [ READ_6 ] = "READ_6",
1360 [ WRITE_6 ] = "WRITE_6",
1361 [ SET_CAPACITY ] = "SET_CAPACITY",
1362 [ READ_REVERSE ] = "READ_REVERSE",
1363 [ WRITE_FILEMARKS ] = "WRITE_FILEMARKS",
1364 [ SPACE ] = "SPACE",
1365 [ INQUIRY ] = "INQUIRY",
1366 [ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA",
1367 [ MAINTENANCE_IN ] = "MAINTENANCE_IN",
1368 [ MAINTENANCE_OUT ] = "MAINTENANCE_OUT",
1369 [ MODE_SELECT ] = "MODE_SELECT",
1370 [ RESERVE ] = "RESERVE",
1371 [ RELEASE ] = "RELEASE",
1372 [ COPY ] = "COPY",
1373 [ ERASE ] = "ERASE",
1374 [ MODE_SENSE ] = "MODE_SENSE",
1375 [ START_STOP ] = "START_STOP/LOAD_UNLOAD",
1376 /* LOAD_UNLOAD and START_STOP use the same operation code */
1377 [ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC",
1378 [ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC",
1379 [ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL",
1380 [ READ_CAPACITY_10 ] = "READ_CAPACITY_10",
1381 [ READ_10 ] = "READ_10",
1382 [ WRITE_10 ] = "WRITE_10",
1383 [ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT",
1384 /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */
1385 [ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10",
1386 [ VERIFY_10 ] = "VERIFY_10",
1387 [ SEARCH_HIGH ] = "SEARCH_HIGH",
1388 [ SEARCH_EQUAL ] = "SEARCH_EQUAL",
1389 [ SEARCH_LOW ] = "SEARCH_LOW",
1390 [ SET_LIMITS ] = "SET_LIMITS",
1391 [ PRE_FETCH ] = "PRE_FETCH/READ_POSITION",
1392 /* READ_POSITION and PRE_FETCH use the same operation code */
1393 [ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE",
1394 [ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE",
1395 [ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE",
1396 /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */
1397 [ MEDIUM_SCAN ] = "MEDIUM_SCAN",
1398 [ COMPARE ] = "COMPARE",
1399 [ COPY_VERIFY ] = "COPY_VERIFY",
1400 [ WRITE_BUFFER ] = "WRITE_BUFFER",
1401 [ READ_BUFFER ] = "READ_BUFFER",
1402 [ UPDATE_BLOCK ] = "UPDATE_BLOCK",
1403 [ READ_LONG_10 ] = "READ_LONG_10",
1404 [ WRITE_LONG_10 ] = "WRITE_LONG_10",
1405 [ CHANGE_DEFINITION ] = "CHANGE_DEFINITION",
1406 [ WRITE_SAME_10 ] = "WRITE_SAME_10",
1407 [ UNMAP ] = "UNMAP",
1408 [ READ_TOC ] = "READ_TOC",
1409 [ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT",
1410 [ SANITIZE ] = "SANITIZE",
1411 [ GET_CONFIGURATION ] = "GET_CONFIGURATION",
1412 [ LOG_SELECT ] = "LOG_SELECT",
1413 [ LOG_SENSE ] = "LOG_SENSE",
1414 [ MODE_SELECT_10 ] = "MODE_SELECT_10",
1415 [ RESERVE_10 ] = "RESERVE_10",
1416 [ RELEASE_10 ] = "RELEASE_10",
1417 [ MODE_SENSE_10 ] = "MODE_SENSE_10",
1418 [ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN",
1419 [ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT",
1420 [ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16",
1421 [ EXTENDED_COPY ] = "EXTENDED_COPY",
1422 [ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16",
1423 [ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN",
1424 [ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT",
1425 [ READ_16 ] = "READ_16",
1426 [ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE",
1427 [ WRITE_16 ] = "WRITE_16",
1428 [ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16",
1429 [ VERIFY_16 ] = "VERIFY_16",
1430 [ PRE_FETCH_16 ] = "PRE_FETCH_16",
1431 [ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16",
1432 /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */
1433 [ LOCATE_16 ] = "LOCATE_16",
1434 [ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16",
1435 /* ERASE_16 and WRITE_SAME_16 use the same operation code */
1436 [ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16",
1437 [ WRITE_LONG_16 ] = "WRITE_LONG_16",
1438 [ REPORT_LUNS ] = "REPORT_LUNS",
1439 [ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12",
1440 [ MOVE_MEDIUM ] = "MOVE_MEDIUM",
1441 [ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM",
1442 [ READ_12 ] = "READ_12",
1443 [ WRITE_12 ] = "WRITE_12",
1444 [ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE",
1445 /* ERASE_12 and GET_PERFORMANCE use the same operation code */
1446 [ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12",
1447 [ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12",
1448 [ VERIFY_12 ] = "VERIFY_12",
1449 [ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12",
1450 [ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12",
1451 [ SEARCH_LOW_12 ] = "SEARCH_LOW_12",
1452 [ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS",
1453 [ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING",
1454 /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */
1455 [ READ_CD ] = "READ_CD",
1456 [ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12",
1457 [ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE",
1458 [ RESERVE_TRACK ] = "RESERVE_TRACK",
1459 [ SEND_CUE_SHEET ] = "SEND_CUE_SHEET",
1460 [ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE",
1461 [ SET_CD_SPEED ] = "SET_CD_SPEED",
1462 [ SET_READ_AHEAD ] = "SET_READ_AHEAD",
1463 [ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE",
1464 [ MECHANISM_STATUS ] = "MECHANISM_STATUS",
1465 };
1466
1467 if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL)
1468 return "*UNKNOWN*";
1469 return names[cmd];
1470 }
1471
1472 SCSIRequest *scsi_req_ref(SCSIRequest *req)
1473 {
1474 assert(req->refcount > 0);
1475 req->refcount++;
1476 return req;
1477 }
1478
1479 void scsi_req_unref(SCSIRequest *req)
1480 {
1481 assert(req->refcount > 0);
1482 if (--req->refcount == 0) {
1483 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, req->dev->qdev.parent_bus);
1484 if (bus->info->free_request && req->hba_private) {
1485 bus->info->free_request(bus, req->hba_private);
1486 }
1487 if (req->ops->free_req) {
1488 req->ops->free_req(req);
1489 }
1490 g_free(req);
1491 }
1492 }
1493
1494 /* Tell the device that we finished processing this chunk of I/O. It
1495 will start the next chunk or complete the command. */
1496 void scsi_req_continue(SCSIRequest *req)
1497 {
1498 trace_scsi_req_continue(req->dev->id, req->lun, req->tag);
1499 if (req->cmd.mode == SCSI_XFER_TO_DEV) {
1500 req->ops->write_data(req);
1501 } else {
1502 req->ops->read_data(req);
1503 }
1504 }
1505
1506 /* Called by the devices when data is ready for the HBA. The HBA should
1507 start a DMA operation to read or fill the device's data buffer.
1508 Once it completes, calling scsi_req_continue will restart I/O. */
1509 void scsi_req_data(SCSIRequest *req, int len)
1510 {
1511 uint8_t *buf;
1512 if (req->io_canceled) {
1513 trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len);
1514 return;
1515 }
1516 trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
1517 assert(req->cmd.mode != SCSI_XFER_NONE);
1518 if (!req->sg) {
1519 req->resid -= len;
1520 req->bus->info->transfer_data(req, len);
1521 return;
1522 }
1523
1524 /* If the device calls scsi_req_data and the HBA specified a
1525 * scatter/gather list, the transfer has to happen in a single
1526 * step. */
1527 assert(!req->dma_started);
1528 req->dma_started = true;
1529
1530 buf = scsi_req_get_buf(req);
1531 if (req->cmd.mode == SCSI_XFER_FROM_DEV) {
1532 req->resid = dma_buf_read(buf, len, req->sg);
1533 } else {
1534 req->resid = dma_buf_write(buf, len, req->sg);
1535 }
1536 scsi_req_continue(req);
1537 }
1538
1539 void scsi_req_print(SCSIRequest *req)
1540 {
1541 FILE *fp = stderr;
1542 int i;
1543
1544 fprintf(fp, "[%s id=%d] %s",
1545 req->dev->qdev.parent_bus->name,
1546 req->dev->id,
1547 scsi_command_name(req->cmd.buf[0]));
1548 for (i = 1; i < req->cmd.len; i++) {
1549 fprintf(fp, " 0x%02x", req->cmd.buf[i]);
1550 }
1551 switch (req->cmd.mode) {
1552 case SCSI_XFER_NONE:
1553 fprintf(fp, " - none\n");
1554 break;
1555 case SCSI_XFER_FROM_DEV:
1556 fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer);
1557 break;
1558 case SCSI_XFER_TO_DEV:
1559 fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer);
1560 break;
1561 default:
1562 fprintf(fp, " - Oops\n");
1563 break;
1564 }
1565 }
1566
1567 void scsi_req_complete(SCSIRequest *req, int status)
1568 {
1569 assert(req->status == -1);
1570 req->status = status;
1571
1572 assert(req->sense_len <= sizeof(req->sense));
1573 if (status == GOOD) {
1574 req->sense_len = 0;
1575 }
1576
1577 if (req->sense_len) {
1578 memcpy(req->dev->sense, req->sense, req->sense_len);
1579 req->dev->sense_len = req->sense_len;
1580 req->dev->sense_is_ua = (req->ops == &reqops_unit_attention);
1581 } else {
1582 req->dev->sense_len = 0;
1583 req->dev->sense_is_ua = false;
1584 }
1585
1586 /*
1587 * Unit attention state is now stored in the device's sense buffer
1588 * if the HBA didn't do autosense. Clear the pending unit attention
1589 * flags.
1590 */
1591 scsi_clear_unit_attention(req);
1592
1593 scsi_req_ref(req);
1594 scsi_req_dequeue(req);
1595 req->bus->info->complete(req, req->status, req->resid);
1596 scsi_req_unref(req);
1597 }
1598
1599 void scsi_req_cancel(SCSIRequest *req)
1600 {
1601 trace_scsi_req_cancel(req->dev->id, req->lun, req->tag);
1602 if (!req->enqueued) {
1603 return;
1604 }
1605 scsi_req_ref(req);
1606 scsi_req_dequeue(req);
1607 req->io_canceled = true;
1608 if (req->ops->cancel_io) {
1609 req->ops->cancel_io(req);
1610 }
1611 if (req->bus->info->cancel) {
1612 req->bus->info->cancel(req);
1613 }
1614 scsi_req_unref(req);
1615 }
1616
1617 void scsi_req_abort(SCSIRequest *req, int status)
1618 {
1619 if (!req->enqueued) {
1620 return;
1621 }
1622 scsi_req_ref(req);
1623 scsi_req_dequeue(req);
1624 req->io_canceled = true;
1625 if (req->ops->cancel_io) {
1626 req->ops->cancel_io(req);
1627 }
1628 scsi_req_complete(req, status);
1629 scsi_req_unref(req);
1630 }
1631
1632 static int scsi_ua_precedence(SCSISense sense)
1633 {
1634 if (sense.key != UNIT_ATTENTION) {
1635 return INT_MAX;
1636 }
1637 if (sense.asc == 0x29 && sense.ascq == 0x04) {
1638 /* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */
1639 return 1;
1640 } else if (sense.asc == 0x3F && sense.ascq == 0x01) {
1641 /* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */
1642 return 2;
1643 } else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) {
1644 /* These two go with "all others". */
1645 ;
1646 } else if (sense.asc == 0x29 && sense.ascq <= 0x07) {
1647 /* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0
1648 * POWER ON OCCURRED = 1
1649 * SCSI BUS RESET OCCURRED = 2
1650 * BUS DEVICE RESET FUNCTION OCCURRED = 3
1651 * I_T NEXUS LOSS OCCURRED = 7
1652 */
1653 return sense.ascq;
1654 } else if (sense.asc == 0x2F && sense.ascq == 0x01) {
1655 /* COMMANDS CLEARED BY POWER LOSS NOTIFICATION */
1656 return 8;
1657 }
1658 return (sense.asc << 8) | sense.ascq;
1659 }
1660
1661 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense)
1662 {
1663 int prec1, prec2;
1664 if (sense.key != UNIT_ATTENTION) {
1665 return;
1666 }
1667 trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key,
1668 sense.asc, sense.ascq);
1669
1670 /*
1671 * Override a pre-existing unit attention condition, except for a more
1672 * important reset condition.
1673 */
1674 prec1 = scsi_ua_precedence(sdev->unit_attention);
1675 prec2 = scsi_ua_precedence(sense);
1676 if (prec2 < prec1) {
1677 sdev->unit_attention = sense;
1678 }
1679 }
1680
1681 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense)
1682 {
1683 SCSIRequest *req;
1684
1685 while (!QTAILQ_EMPTY(&sdev->requests)) {
1686 req = QTAILQ_FIRST(&sdev->requests);
1687 scsi_req_cancel(req);
1688 }
1689
1690 scsi_device_set_ua(sdev, sense);
1691 }
1692
1693 static char *scsibus_get_dev_path(DeviceState *dev)
1694 {
1695 SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev);
1696 DeviceState *hba = dev->parent_bus->parent;
1697 char *id;
1698 char *path;
1699
1700 id = qdev_get_dev_path(hba);
1701 if (id) {
1702 path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun);
1703 } else {
1704 path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun);
1705 }
1706 g_free(id);
1707 return path;
1708 }
1709
1710 static char *scsibus_get_fw_dev_path(DeviceState *dev)
1711 {
1712 SCSIDevice *d = SCSI_DEVICE(dev);
1713 char path[100];
1714
1715 snprintf(path, sizeof(path), "channel@%x/%s@%x,%x", d->channel,
1716 qdev_fw_name(dev), d->id, d->lun);
1717
1718 return strdup(path);
1719 }
1720
1721 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun)
1722 {
1723 BusChild *kid;
1724 SCSIDevice *target_dev = NULL;
1725
1726 QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, ChildrenHead, sibling) {
1727 DeviceState *qdev = kid->child;
1728 SCSIDevice *dev = SCSI_DEVICE(qdev);
1729
1730 if (dev->channel == channel && dev->id == id) {
1731 if (dev->lun == lun) {
1732 return dev;
1733 }
1734 target_dev = dev;
1735 }
1736 }
1737 return target_dev;
1738 }
1739
1740 /* SCSI request list. For simplicity, pv points to the whole device */
1741
1742 static void put_scsi_requests(QEMUFile *f, void *pv, size_t size)
1743 {
1744 SCSIDevice *s = pv;
1745 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus);
1746 SCSIRequest *req;
1747
1748 QTAILQ_FOREACH(req, &s->requests, next) {
1749 assert(!req->io_canceled);
1750 assert(req->status == -1);
1751 assert(req->enqueued);
1752
1753 qemu_put_sbyte(f, req->retry ? 1 : 2);
1754 qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf));
1755 qemu_put_be32s(f, &req->tag);
1756 qemu_put_be32s(f, &req->lun);
1757 if (bus->info->save_request) {
1758 bus->info->save_request(f, req);
1759 }
1760 if (req->ops->save_request) {
1761 req->ops->save_request(f, req);
1762 }
1763 }
1764 qemu_put_sbyte(f, 0);
1765 }
1766
1767 static int get_scsi_requests(QEMUFile *f, void *pv, size_t size)
1768 {
1769 SCSIDevice *s = pv;
1770 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus);
1771 int8_t sbyte;
1772
1773 while ((sbyte = qemu_get_sbyte(f)) > 0) {
1774 uint8_t buf[SCSI_CMD_BUF_SIZE];
1775 uint32_t tag;
1776 uint32_t lun;
1777 SCSIRequest *req;
1778
1779 qemu_get_buffer(f, buf, sizeof(buf));
1780 qemu_get_be32s(f, &tag);
1781 qemu_get_be32s(f, &lun);
1782 req = scsi_req_new(s, tag, lun, buf, NULL);
1783 req->retry = (sbyte == 1);
1784 if (bus->info->load_request) {
1785 req->hba_private = bus->info->load_request(f, req);
1786 }
1787 if (req->ops->load_request) {
1788 req->ops->load_request(f, req);
1789 }
1790
1791 /* Just restart it later. */
1792 scsi_req_enqueue_internal(req);
1793
1794 /* At this point, the request will be kept alive by the reference
1795 * added by scsi_req_enqueue_internal, so we can release our reference.
1796 * The HBA of course will add its own reference in the load_request
1797 * callback if it needs to hold on the SCSIRequest.
1798 */
1799 scsi_req_unref(req);
1800 }
1801
1802 return 0;
1803 }
1804
1805 static int scsi_qdev_unplug(DeviceState *qdev)
1806 {
1807 SCSIDevice *dev = SCSI_DEVICE(qdev);
1808 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
1809
1810 if (bus->info->hot_unplug) {
1811 bus->info->hot_unplug(bus, dev);
1812 }
1813 return qdev_simple_unplug_cb(qdev);
1814 }
1815
1816 static const VMStateInfo vmstate_info_scsi_requests = {
1817 .name = "scsi-requests",
1818 .get = get_scsi_requests,
1819 .put = put_scsi_requests,
1820 };
1821
1822 const VMStateDescription vmstate_scsi_device = {
1823 .name = "SCSIDevice",
1824 .version_id = 1,
1825 .minimum_version_id = 1,
1826 .minimum_version_id_old = 1,
1827 .fields = (VMStateField[]) {
1828 VMSTATE_UINT8(unit_attention.key, SCSIDevice),
1829 VMSTATE_UINT8(unit_attention.asc, SCSIDevice),
1830 VMSTATE_UINT8(unit_attention.ascq, SCSIDevice),
1831 VMSTATE_BOOL(sense_is_ua, SCSIDevice),
1832 VMSTATE_UINT8_ARRAY(sense, SCSIDevice, SCSI_SENSE_BUF_SIZE),
1833 VMSTATE_UINT32(sense_len, SCSIDevice),
1834 {
1835 .name = "requests",
1836 .version_id = 0,
1837 .field_exists = NULL,
1838 .size = 0, /* ouch */
1839 .info = &vmstate_info_scsi_requests,
1840 .flags = VMS_SINGLE,
1841 .offset = 0,
1842 },
1843 VMSTATE_END_OF_LIST()
1844 }
1845 };
1846
1847 static void scsi_device_class_init(ObjectClass *klass, void *data)
1848 {
1849 DeviceClass *k = DEVICE_CLASS(klass);
1850 k->bus_type = TYPE_SCSI_BUS;
1851 k->init = scsi_qdev_init;
1852 k->unplug = scsi_qdev_unplug;
1853 k->exit = scsi_qdev_exit;
1854 k->props = scsi_props;
1855 }
1856
1857 static TypeInfo scsi_device_type_info = {
1858 .name = TYPE_SCSI_DEVICE,
1859 .parent = TYPE_DEVICE,
1860 .instance_size = sizeof(SCSIDevice),
1861 .abstract = true,
1862 .class_size = sizeof(SCSIDeviceClass),
1863 .class_init = scsi_device_class_init,
1864 };
1865
1866 static void scsi_register_types(void)
1867 {
1868 type_register_static(&scsi_bus_info);
1869 type_register_static(&scsi_device_type_info);
1870 }
1871
1872 type_init(scsi_register_types)
Qemu with PowerPC KVM improvements