2 #include "qemu-error.h"
10 static char *scsibus_get_fw_dev_path(DeviceState *dev);
11 static int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf);
12 static void scsi_req_dequeue(SCSIRequest *req);
14 static struct BusInfo scsi_bus_info = {
16 .size = sizeof(SCSIBus),
17 .get_fw_dev_path = scsibus_get_fw_dev_path,
18 .props = (Property[]) {
19 DEFINE_PROP_UINT32("channel", SCSIDevice, channel, 0),
20 DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1),
21 DEFINE_PROP_UINT32("lun", SCSIDevice, lun, -1),
22 DEFINE_PROP_END_OF_LIST(),
25 static int next_scsi_bus;
27 static int scsi_device_init(SCSIDevice *s)
29 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
36 static void scsi_device_destroy(SCSIDevice *s)
38 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
44 static SCSIRequest *scsi_device_alloc_req(SCSIDevice *s, uint32_t tag, uint32_t lun,
45 uint8_t *buf, void *hba_private)
47 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
49 return sc->alloc_req(s, tag, lun, buf, hba_private);
55 static void scsi_device_unit_attention_reported(SCSIDevice *s)
57 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
58 if (sc->unit_attention_reported) {
59 sc->unit_attention_reported(s);
63 /* Create a scsi bus, and attach devices to it. */
64 void scsi_bus_new(SCSIBus *bus, DeviceState *host, const SCSIBusInfo *info)
66 qbus_create_inplace(&bus->qbus, &scsi_bus_info, host, NULL);
67 bus->busnr = next_scsi_bus++;
69 bus->qbus.allow_hotplug = 1;
72 static void scsi_dma_restart_bh(void *opaque)
74 SCSIDevice *s = opaque;
75 SCSIRequest *req, *next;
77 qemu_bh_delete(s->bh);
80 QTAILQ_FOREACH_SAFE(req, &s->requests, next, next) {
84 switch (req->cmd.mode) {
85 case SCSI_XFER_FROM_DEV:
86 case SCSI_XFER_TO_DEV:
87 scsi_req_continue(req);
91 scsi_req_dequeue(req);
92 scsi_req_enqueue(req);
100 void scsi_req_retry(SCSIRequest *req)
102 /* No need to save a reference, because scsi_dma_restart_bh just
103 * looks at the request list. */
107 static void scsi_dma_restart_cb(void *opaque, int running, RunState state)
109 SCSIDevice *s = opaque;
115 s->bh = qemu_bh_new(scsi_dma_restart_bh, s);
116 qemu_bh_schedule(s->bh);
120 static int scsi_qdev_init(DeviceState *qdev)
122 SCSIDevice *dev = SCSI_DEVICE(qdev);
123 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
127 if (dev->channel > bus->info->max_channel) {
128 error_report("bad scsi channel id: %d", dev->channel);
131 if (dev->id != -1 && dev->id > bus->info->max_target) {
132 error_report("bad scsi device id: %d", dev->id);
138 if (dev->lun == -1) {
142 d = scsi_device_find(bus, dev->channel, ++id, dev->lun);
143 } while (d && d->lun == dev->lun && id <= bus->info->max_target);
144 if (id > bus->info->max_target) {
145 error_report("no free target");
149 } else if (dev->lun == -1) {
152 d = scsi_device_find(bus, dev->channel, dev->id, ++lun);
153 } while (d && d->lun == lun && lun < bus->info->max_lun);
154 if (lun > bus->info->max_lun) {
155 error_report("no free lun");
160 d = scsi_device_find(bus, dev->channel, dev->id, dev->lun);
161 if (dev->lun == d->lun && dev != d) {
166 QTAILQ_INIT(&dev->requests);
167 rc = scsi_device_init(dev);
169 dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb,
177 static int scsi_qdev_exit(DeviceState *qdev)
179 SCSIDevice *dev = SCSI_DEVICE(qdev);
182 qemu_del_vm_change_state_handler(dev->vmsentry);
184 scsi_device_destroy(dev);
188 /* handle legacy '-drive if=scsi,...' cmd line args */
189 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
190 int unit, bool removable, int bootindex)
195 driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk";
196 dev = qdev_create(&bus->qbus, driver);
197 qdev_prop_set_uint32(dev, "scsi-id", unit);
198 if (bootindex >= 0) {
199 qdev_prop_set_int32(dev, "bootindex", bootindex);
201 if (qdev_prop_exists(dev, "removable")) {
202 qdev_prop_set_bit(dev, "removable", removable);
204 if (qdev_prop_set_drive(dev, "drive", bdrv) < 0) {
208 if (qdev_init(dev) < 0)
210 return SCSI_DEVICE(dev);
213 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
220 for (unit = 0; unit < bus->info->max_target; unit++) {
221 dinfo = drive_get(IF_SCSI, bus->busnr, unit);
225 qemu_opts_loc_restore(dinfo->opts);
226 if (!scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit, false, -1)) {
235 /* SCSIReqOps implementation for invalid commands. */
237 static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf)
239 scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE));
240 scsi_req_complete(req, CHECK_CONDITION);
244 static const struct SCSIReqOps reqops_invalid_opcode = {
245 .size = sizeof(SCSIRequest),
246 .send_command = scsi_invalid_command
249 /* SCSIReqOps implementation for unit attention conditions. */
251 static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf)
253 if (req->dev && req->dev->unit_attention.key == UNIT_ATTENTION) {
254 scsi_req_build_sense(req, req->dev->unit_attention);
255 } else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
256 scsi_req_build_sense(req, req->bus->unit_attention);
258 scsi_req_complete(req, CHECK_CONDITION);
262 static const struct SCSIReqOps reqops_unit_attention = {
263 .size = sizeof(SCSIRequest),
264 .send_command = scsi_unit_attention
267 /* SCSIReqOps implementation for REPORT LUNS and for commands sent to
270 typedef struct SCSITargetReq SCSITargetReq;
272 struct SCSITargetReq {
278 static void store_lun(uint8_t *outbuf, int lun)
284 outbuf[1] = (lun & 255);
285 outbuf[0] = (lun >> 8) | 0x40;
288 static bool scsi_target_emulate_report_luns(SCSITargetReq *r)
295 if (r->req.cmd.xfer < 16) {
298 if (r->req.cmd.buf[2] > 2) {
301 channel = r->req.dev->channel;
305 QTAILQ_FOREACH(qdev, &r->req.bus->qbus.children, sibling) {
306 SCSIDevice *dev = SCSI_DEVICE(qdev);
308 if (dev->channel == channel && dev->id == id) {
318 len = MIN(n + 8, r->req.cmd.xfer & ~7);
319 if (len > sizeof(r->buf)) {
320 /* TODO: > 256 LUNs? */
324 memset(r->buf, 0, len);
325 stl_be_p(&r->buf, n);
326 i = found_lun0 ? 8 : 16;
327 QTAILQ_FOREACH(qdev, &r->req.bus->qbus.children, sibling) {
328 SCSIDevice *dev = SCSI_DEVICE(qdev);
330 if (dev->channel == channel && dev->id == id) {
331 store_lun(&r->buf[i], dev->lun);
340 static bool scsi_target_emulate_inquiry(SCSITargetReq *r)
342 assert(r->req.dev->lun != r->req.lun);
343 if (r->req.cmd.buf[1] & 0x2) {
344 /* Command support data - optional, not implemented */
348 if (r->req.cmd.buf[1] & 0x1) {
349 /* Vital product data */
350 uint8_t page_code = r->req.cmd.buf[2];
351 if (r->req.cmd.xfer < 4) {
355 r->buf[r->len++] = page_code ; /* this page */
356 r->buf[r->len++] = 0x00;
359 case 0x00: /* Supported page codes, mandatory */
363 r->buf[r->len++] = 0x00; /* list of supported pages (this page) */
364 r->buf[pages] = r->len - pages - 1; /* number of pages */
371 assert(r->len < sizeof(r->buf));
372 r->len = MIN(r->req.cmd.xfer, r->len);
376 /* Standard INQUIRY data */
377 if (r->req.cmd.buf[2] != 0) {
382 if (r->req.cmd.xfer < 5) {
386 r->len = MIN(r->req.cmd.xfer, 36);
387 memset(r->buf, 0, r->len);
388 if (r->req.lun != 0) {
389 r->buf[0] = TYPE_NO_LUN;
391 r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE;
392 r->buf[2] = 5; /* Version */
393 r->buf[3] = 2 | 0x10; /* HiSup, response data format */
394 r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */
395 r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ. */
396 memcpy(&r->buf[8], "QEMU ", 8);
397 memcpy(&r->buf[16], "QEMU TARGET ", 16);
398 strncpy((char *) &r->buf[32], QEMU_VERSION, 4);
403 static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
405 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
409 if (!scsi_target_emulate_report_luns(r)) {
410 goto illegal_request;
414 if (!scsi_target_emulate_inquiry(r)) {
415 goto illegal_request;
419 if (req->cmd.xfer < 4) {
420 goto illegal_request;
422 r->len = scsi_device_get_sense(r->req.dev, r->buf,
423 MIN(req->cmd.xfer, sizeof r->buf),
424 (req->cmd.buf[1] & 1) == 0);
425 if (r->req.dev->sense_is_ua) {
426 scsi_device_unit_attention_reported(req->dev);
427 r->req.dev->sense_len = 0;
428 r->req.dev->sense_is_ua = false;
432 scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED));
433 scsi_req_complete(req, CHECK_CONDITION);
436 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD));
437 scsi_req_complete(req, CHECK_CONDITION);
442 scsi_req_complete(req, GOOD);
447 static void scsi_target_read_data(SCSIRequest *req)
449 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
455 scsi_req_data(&r->req, n);
457 scsi_req_complete(&r->req, GOOD);
461 static uint8_t *scsi_target_get_buf(SCSIRequest *req)
463 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
468 static const struct SCSIReqOps reqops_target_command = {
469 .size = sizeof(SCSITargetReq),
470 .send_command = scsi_target_send_command,
471 .read_data = scsi_target_read_data,
472 .get_buf = scsi_target_get_buf,
476 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
477 uint32_t tag, uint32_t lun, void *hba_private)
481 req = g_malloc0(reqops->size);
483 req->bus = scsi_bus_from_device(d);
487 req->hba_private = hba_private;
491 trace_scsi_req_alloc(req->dev->id, req->lun, req->tag);
495 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
496 uint8_t *buf, void *hba_private)
498 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
502 if (scsi_req_parse(&cmd, d, buf) != 0) {
503 trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]);
504 req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private);
506 trace_scsi_req_parsed(d->id, lun, tag, buf[0],
509 trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0],
513 if ((d->unit_attention.key == UNIT_ATTENTION ||
514 bus->unit_attention.key == UNIT_ATTENTION) &&
515 (buf[0] != INQUIRY &&
516 buf[0] != REPORT_LUNS &&
517 buf[0] != GET_CONFIGURATION &&
518 buf[0] != GET_EVENT_STATUS_NOTIFICATION &&
521 * If we already have a pending unit attention condition,
522 * report this one before triggering another one.
524 !(buf[0] == REQUEST_SENSE && d->sense_is_ua))) {
525 req = scsi_req_alloc(&reqops_unit_attention, d, tag, lun,
527 } else if (lun != d->lun ||
528 buf[0] == REPORT_LUNS ||
529 (buf[0] == REQUEST_SENSE && (d->sense_len || cmd.xfer < 4))) {
530 req = scsi_req_alloc(&reqops_target_command, d, tag, lun,
533 req = scsi_device_alloc_req(d, tag, lun, buf, hba_private);
538 req->resid = req->cmd.xfer;
542 trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]);
544 case TEST_UNIT_READY:
545 trace_scsi_test_unit_ready(d->id, lun, tag);
548 trace_scsi_report_luns(d->id, lun, tag);
551 trace_scsi_request_sense(d->id, lun, tag);
560 uint8_t *scsi_req_get_buf(SCSIRequest *req)
562 return req->ops->get_buf(req);
565 static void scsi_clear_unit_attention(SCSIRequest *req)
568 if (req->dev->unit_attention.key != UNIT_ATTENTION &&
569 req->bus->unit_attention.key != UNIT_ATTENTION) {
574 * If an INQUIRY command enters the enabled command state,
575 * the device server shall [not] clear any unit attention condition;
576 * See also MMC-6, paragraphs 6.5 and 6.6.2.
578 if (req->cmd.buf[0] == INQUIRY ||
579 req->cmd.buf[0] == GET_CONFIGURATION ||
580 req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) {
584 if (req->dev->unit_attention.key == UNIT_ATTENTION) {
585 ua = &req->dev->unit_attention;
587 ua = &req->bus->unit_attention;
591 * If a REPORT LUNS command enters the enabled command state, [...]
592 * the device server shall clear any pending unit attention condition
593 * with an additional sense code of REPORTED LUNS DATA HAS CHANGED.
595 if (req->cmd.buf[0] == REPORT_LUNS &&
596 !(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc &&
597 ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) {
601 *ua = SENSE_CODE(NO_SENSE);
604 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len)
609 if (!req->sense_len) {
613 ret = scsi_build_sense(req->sense, req->sense_len, buf, len, true);
616 * FIXME: clearing unit attention conditions upon autosense should be done
617 * only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b
620 * We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and
621 * 10b for HBAs that do not support it (do not call scsi_req_get_sense).
622 * Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b.
624 if (req->dev->sense_is_ua) {
625 scsi_device_unit_attention_reported(req->dev);
626 req->dev->sense_len = 0;
627 req->dev->sense_is_ua = false;
632 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed)
634 return scsi_build_sense(dev->sense, dev->sense_len, buf, len, fixed);
637 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense)
639 trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag,
640 sense.key, sense.asc, sense.ascq);
641 memset(req->sense, 0, 18);
642 req->sense[0] = 0xf0;
643 req->sense[2] = sense.key;
645 req->sense[12] = sense.asc;
646 req->sense[13] = sense.ascq;
650 int32_t scsi_req_enqueue(SCSIRequest *req)
654 assert(!req->enqueued);
656 if (req->bus->info->get_sg_list) {
657 req->sg = req->bus->info->get_sg_list(req);
661 req->enqueued = true;
662 QTAILQ_INSERT_TAIL(&req->dev->requests, req, next);
665 rc = req->ops->send_command(req, req->cmd.buf);
670 static void scsi_req_dequeue(SCSIRequest *req)
672 trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag);
675 QTAILQ_REMOVE(&req->dev->requests, req, next);
676 req->enqueued = false;
681 static int scsi_get_performance_length(int num_desc, int type, int data_type)
683 /* MMC-6, paragraph 6.7. */
686 if ((data_type & 3) == 0) {
687 /* Each descriptor is as in Table 295 - Nominal performance. */
688 return 16 * num_desc + 8;
690 /* Each descriptor is as in Table 296 - Exceptions. */
691 return 6 * num_desc + 8;
696 return 8 * num_desc + 8;
698 return 2048 * num_desc + 8;
700 return 16 * num_desc + 8;
706 static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
708 switch (buf[0] >> 5) {
712 /* length 0 means 256 blocks */
713 if (cmd->xfer == 0) {
719 cmd->xfer = lduw_be_p(&buf[7]);
723 cmd->xfer = ldl_be_p(&buf[10]) & 0xffffffffULL;
727 cmd->xfer = ldl_be_p(&buf[6]) & 0xffffffffULL;
735 case TEST_UNIT_READY:
739 case WRITE_FILEMARKS:
740 case WRITE_FILEMARKS_16:
745 case ALLOW_MEDIUM_REMOVAL:
748 case SYNCHRONIZE_CACHE:
749 case SYNCHRONIZE_CACHE_16:
751 case LOCK_UNLOCK_CACHE:
762 case ALLOW_OVERWRITE:
770 case READ_CAPACITY_10:
773 case READ_BLOCK_LIMITS:
776 case SEND_VOLUME_TAG:
777 /* GPCMD_SET_STREAMING from multimedia commands. */
778 if (dev->type == TYPE_ROM) {
779 cmd->xfer = buf[10] | (buf[9] << 8);
781 cmd->xfer = buf[9] | (buf[8] << 8);
785 case WRITE_VERIFY_10:
788 case WRITE_VERIFY_12:
790 case WRITE_VERIFY_16:
791 cmd->xfer *= dev->blocksize;
796 case RECOVER_BUFFERED_DATA:
799 cmd->xfer *= dev->blocksize;
802 /* MMC mandates the parameter list to be 12-bytes long. Parameters
803 * for block devices are restricted to the header right now. */
804 if (dev->type == TYPE_ROM && (buf[1] & 16)) {
807 cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4);
811 case RECEIVE_DIAGNOSTIC:
812 case SEND_DIAGNOSTIC:
813 cmd->xfer = buf[4] | (buf[3] << 8);
819 cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16);
821 case PERSISTENT_RESERVE_OUT:
822 cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL;
825 if (dev->type == TYPE_ROM) {
826 /* MMC command GET PERFORMANCE. */
827 cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8),
828 buf[10], buf[1] & 0x1f);
831 case MECHANISM_STATUS:
832 case READ_DVD_STRUCTURE:
833 case SEND_DVD_STRUCTURE:
834 case MAINTENANCE_OUT:
836 if (dev->type == TYPE_ROM) {
837 /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */
838 cmd->xfer = buf[9] | (buf[8] << 8);
845 static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
848 /* stream commands */
855 case RECOVER_BUFFERED_DATA:
858 cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16);
859 if (buf[1] & 0x01) { /* fixed */
860 cmd->xfer *= dev->blocksize;
869 cmd->xfer = buf[13] | (buf[12] << 8);
872 cmd->xfer = buf[8] | (buf[7] << 8);
875 cmd->xfer = buf[4] | (buf[3] << 8);
877 /* generic commands */
879 return scsi_req_length(cmd, dev, buf);
884 static void scsi_cmd_xfer_mode(SCSICommand *cmd)
886 switch (cmd->buf[0]) {
889 case WRITE_VERIFY_10:
891 case WRITE_VERIFY_12:
893 case WRITE_VERIFY_16:
897 case CHANGE_DEFINITION:
901 case SEND_DIAGNOSTIC:
904 case REASSIGN_BLOCKS:
912 case SEARCH_EQUAL_12:
915 case SEND_VOLUME_TAG:
917 case SEND_DVD_STRUCTURE:
918 case PERSISTENT_RESERVE_OUT:
919 case MAINTENANCE_OUT:
920 cmd->mode = SCSI_XFER_TO_DEV;
924 cmd->mode = SCSI_XFER_FROM_DEV;
926 cmd->mode = SCSI_XFER_NONE;
932 static uint64_t scsi_cmd_lba(SCSICommand *cmd)
934 uint8_t *buf = cmd->buf;
937 switch (buf[0] >> 5) {
939 lba = ldl_be_p(&buf[0]) & 0x1fffff;
944 lba = ldl_be_p(&buf[2]) & 0xffffffffULL;
947 lba = ldq_be_p(&buf[2]);
956 int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
960 if (dev->type == TYPE_TAPE) {
961 rc = scsi_req_stream_length(cmd, dev, buf);
963 rc = scsi_req_length(cmd, dev, buf);
968 memcpy(cmd->buf, buf, cmd->len);
969 scsi_cmd_xfer_mode(cmd);
970 cmd->lba = scsi_cmd_lba(cmd);
975 * Predefined sense codes
978 /* No sense data available */
979 const struct SCSISense sense_code_NO_SENSE = {
980 .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00
983 /* LUN not ready, Manual intervention required */
984 const struct SCSISense sense_code_LUN_NOT_READY = {
985 .key = NOT_READY, .asc = 0x04, .ascq = 0x03
988 /* LUN not ready, Medium not present */
989 const struct SCSISense sense_code_NO_MEDIUM = {
990 .key = NOT_READY, .asc = 0x3a, .ascq = 0x00
993 /* LUN not ready, medium removal prevented */
994 const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = {
995 .key = NOT_READY, .asc = 0x53, .ascq = 0x00
998 /* Hardware error, internal target failure */
999 const struct SCSISense sense_code_TARGET_FAILURE = {
1000 .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00
1003 /* Illegal request, invalid command operation code */
1004 const struct SCSISense sense_code_INVALID_OPCODE = {
1005 .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00
1008 /* Illegal request, LBA out of range */
1009 const struct SCSISense sense_code_LBA_OUT_OF_RANGE = {
1010 .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00
1013 /* Illegal request, Invalid field in CDB */
1014 const struct SCSISense sense_code_INVALID_FIELD = {
1015 .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00
1018 /* Illegal request, LUN not supported */
1019 const struct SCSISense sense_code_LUN_NOT_SUPPORTED = {
1020 .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00
1023 /* Illegal request, Saving parameters not supported */
1024 const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = {
1025 .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00
1028 /* Illegal request, Incompatible medium installed */
1029 const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = {
1030 .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00
1033 /* Illegal request, medium removal prevented */
1034 const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = {
1035 .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x00
1038 /* Command aborted, I/O process terminated */
1039 const struct SCSISense sense_code_IO_ERROR = {
1040 .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06
1043 /* Command aborted, I_T Nexus loss occurred */
1044 const struct SCSISense sense_code_I_T_NEXUS_LOSS = {
1045 .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07
1048 /* Command aborted, Logical Unit failure */
1049 const struct SCSISense sense_code_LUN_FAILURE = {
1050 .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01
1053 /* Unit attention, Power on, reset or bus device reset occurred */
1054 const struct SCSISense sense_code_RESET = {
1055 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00
1058 /* Unit attention, No medium */
1059 const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = {
1060 .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00
1063 /* Unit attention, Medium may have changed */
1064 const struct SCSISense sense_code_MEDIUM_CHANGED = {
1065 .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00
1068 /* Unit attention, Reported LUNs data has changed */
1069 const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = {
1070 .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e
1073 /* Unit attention, Device internal reset */
1074 const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = {
1075 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04
1081 * Convert between fixed and descriptor sense buffers
1083 int scsi_build_sense(uint8_t *in_buf, int in_len,
1084 uint8_t *buf, int len, bool fixed)
1088 if (!fixed && len < 8) {
1093 sense.key = NO_SENSE;
1097 fixed_in = (in_buf[0] & 2) == 0;
1099 if (fixed == fixed_in) {
1100 memcpy(buf, in_buf, MIN(len, in_len));
1101 return MIN(len, in_len);
1105 sense.key = in_buf[2];
1106 sense.asc = in_buf[12];
1107 sense.ascq = in_buf[13];
1109 sense.key = in_buf[1];
1110 sense.asc = in_buf[2];
1111 sense.ascq = in_buf[3];
1115 memset(buf, 0, len);
1117 /* Return fixed format sense buffer */
1121 buf[12] = sense.asc;
1122 buf[13] = sense.ascq;
1123 return MIN(len, 18);
1125 /* Return descriptor format sense buffer */
1129 buf[3] = sense.ascq;
1134 static const char *scsi_command_name(uint8_t cmd)
1136 static const char *names[] = {
1137 [ TEST_UNIT_READY ] = "TEST_UNIT_READY",
1138 [ REWIND ] = "REWIND",
1139 [ REQUEST_SENSE ] = "REQUEST_SENSE",
1140 [ FORMAT_UNIT ] = "FORMAT_UNIT",
1141 [ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS",
1142 [ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS",
1143 [ READ_6 ] = "READ_6",
1144 [ WRITE_6 ] = "WRITE_6",
1145 [ SET_CAPACITY ] = "SET_CAPACITY",
1146 [ READ_REVERSE ] = "READ_REVERSE",
1147 [ WRITE_FILEMARKS ] = "WRITE_FILEMARKS",
1148 [ SPACE ] = "SPACE",
1149 [ INQUIRY ] = "INQUIRY",
1150 [ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA",
1151 [ MAINTENANCE_IN ] = "MAINTENANCE_IN",
1152 [ MAINTENANCE_OUT ] = "MAINTENANCE_OUT",
1153 [ MODE_SELECT ] = "MODE_SELECT",
1154 [ RESERVE ] = "RESERVE",
1155 [ RELEASE ] = "RELEASE",
1157 [ ERASE ] = "ERASE",
1158 [ MODE_SENSE ] = "MODE_SENSE",
1159 [ START_STOP ] = "START_STOP",
1160 [ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC",
1161 [ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC",
1162 [ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL",
1163 [ READ_CAPACITY_10 ] = "READ_CAPACITY_10",
1164 [ READ_10 ] = "READ_10",
1165 [ WRITE_10 ] = "WRITE_10",
1166 [ SEEK_10 ] = "SEEK_10",
1167 [ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10",
1168 [ VERIFY_10 ] = "VERIFY_10",
1169 [ SEARCH_HIGH ] = "SEARCH_HIGH",
1170 [ SEARCH_EQUAL ] = "SEARCH_EQUAL",
1171 [ SEARCH_LOW ] = "SEARCH_LOW",
1172 [ SET_LIMITS ] = "SET_LIMITS",
1173 [ PRE_FETCH ] = "PRE_FETCH/READ_POSITION",
1174 /* READ_POSITION and PRE_FETCH use the same operation code */
1175 [ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE",
1176 [ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE",
1177 [ READ_DEFECT_DATA ] = "READ_DEFECT_DATA",
1178 [ MEDIUM_SCAN ] = "MEDIUM_SCAN",
1179 [ COMPARE ] = "COMPARE",
1180 [ COPY_VERIFY ] = "COPY_VERIFY",
1181 [ WRITE_BUFFER ] = "WRITE_BUFFER",
1182 [ READ_BUFFER ] = "READ_BUFFER",
1183 [ UPDATE_BLOCK ] = "UPDATE_BLOCK",
1184 [ READ_LONG_10 ] = "READ_LONG_10",
1185 [ WRITE_LONG_10 ] = "WRITE_LONG_10",
1186 [ CHANGE_DEFINITION ] = "CHANGE_DEFINITION",
1187 [ WRITE_SAME_10 ] = "WRITE_SAME_10",
1188 [ UNMAP ] = "UNMAP",
1189 [ READ_TOC ] = "READ_TOC",
1190 [ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT",
1191 [ GET_CONFIGURATION ] = "GET_CONFIGURATION",
1192 [ LOG_SELECT ] = "LOG_SELECT",
1193 [ LOG_SENSE ] = "LOG_SENSE",
1194 [ MODE_SELECT_10 ] = "MODE_SELECT_10",
1195 [ RESERVE_10 ] = "RESERVE_10",
1196 [ RELEASE_10 ] = "RELEASE_10",
1197 [ MODE_SENSE_10 ] = "MODE_SENSE_10",
1198 [ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN",
1199 [ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT",
1200 [ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16",
1201 [ EXTENDED_COPY ] = "EXTENDED_COPY",
1202 [ ATA_PASSTHROUGH ] = "ATA_PASSTHROUGH",
1203 [ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN",
1204 [ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT",
1205 [ READ_16 ] = "READ_16",
1206 [ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE",
1207 [ WRITE_16 ] = "WRITE_16",
1208 [ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16",
1209 [ VERIFY_16 ] = "VERIFY_16",
1210 [ PRE_FETCH_16 ] = "PRE_FETCH_16",
1211 [ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16",
1212 /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */
1213 [ LOCATE_16 ] = "LOCATE_16",
1214 [ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16",
1215 /* ERASE_16 and WRITE_SAME_16 use the same operation code */
1216 [ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16",
1217 [ WRITE_LONG_16 ] = "WRITE_LONG_16",
1218 [ REPORT_LUNS ] = "REPORT_LUNS",
1219 [ BLANK ] = "BLANK",
1220 [ MOVE_MEDIUM ] = "MOVE_MEDIUM",
1221 [ LOAD_UNLOAD ] = "LOAD_UNLOAD",
1222 [ READ_12 ] = "READ_12",
1223 [ WRITE_12 ] = "WRITE_12",
1224 [ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE",
1225 /* ERASE_12 and GET_PERFORMANCE use the same operation code */
1226 [ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12",
1227 [ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12",
1228 [ VERIFY_12 ] = "VERIFY_12",
1229 [ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12",
1230 [ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12",
1231 [ SEARCH_LOW_12 ] = "SEARCH_LOW_12",
1232 [ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS",
1233 [ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING",
1234 /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */
1235 [ READ_CD ] = "READ_CD",
1236 [ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12",
1237 [ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE",
1238 [ RESERVE_TRACK ] = "RESERVE_TRACK",
1239 [ SEND_CUE_SHEET ] = "SEND_CUE_SHEET",
1240 [ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE",
1241 [ SET_CD_SPEED ] = "SET_CD_SPEED",
1242 [ SET_READ_AHEAD ] = "SET_READ_AHEAD",
1243 [ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE",
1244 [ MECHANISM_STATUS ] = "MECHANISM_STATUS",
1247 if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL)
1252 SCSIRequest *scsi_req_ref(SCSIRequest *req)
1258 void scsi_req_unref(SCSIRequest *req)
1260 if (--req->refcount == 0) {
1261 if (req->ops->free_req) {
1262 req->ops->free_req(req);
1268 /* Tell the device that we finished processing this chunk of I/O. It
1269 will start the next chunk or complete the command. */
1270 void scsi_req_continue(SCSIRequest *req)
1272 trace_scsi_req_continue(req->dev->id, req->lun, req->tag);
1273 if (req->cmd.mode == SCSI_XFER_TO_DEV) {
1274 req->ops->write_data(req);
1276 req->ops->read_data(req);
1280 /* Called by the devices when data is ready for the HBA. The HBA should
1281 start a DMA operation to read or fill the device's data buffer.
1282 Once it completes, calling scsi_req_continue will restart I/O. */
1283 void scsi_req_data(SCSIRequest *req, int len)
1286 if (req->io_canceled) {
1287 trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len);
1290 trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
1291 assert(req->cmd.mode != SCSI_XFER_NONE);
1294 req->bus->info->transfer_data(req, len);
1298 /* If the device calls scsi_req_data and the HBA specified a
1299 * scatter/gather list, the transfer has to happen in a single
1301 assert(!req->dma_started);
1302 req->dma_started = true;
1304 buf = scsi_req_get_buf(req);
1305 if (req->cmd.mode == SCSI_XFER_FROM_DEV) {
1306 req->resid = dma_buf_read(buf, len, req->sg);
1308 req->resid = dma_buf_write(buf, len, req->sg);
1310 scsi_req_continue(req);
1313 void scsi_req_print(SCSIRequest *req)
1318 fprintf(fp, "[%s id=%d] %s",
1319 req->dev->qdev.parent_bus->name,
1321 scsi_command_name(req->cmd.buf[0]));
1322 for (i = 1; i < req->cmd.len; i++) {
1323 fprintf(fp, " 0x%02x", req->cmd.buf[i]);
1325 switch (req->cmd.mode) {
1326 case SCSI_XFER_NONE:
1327 fprintf(fp, " - none\n");
1329 case SCSI_XFER_FROM_DEV:
1330 fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer);
1332 case SCSI_XFER_TO_DEV:
1333 fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer);
1336 fprintf(fp, " - Oops\n");
1341 void scsi_req_complete(SCSIRequest *req, int status)
1343 assert(req->status == -1);
1344 req->status = status;
1346 assert(req->sense_len < sizeof(req->sense));
1347 if (status == GOOD) {
1351 if (req->sense_len) {
1352 memcpy(req->dev->sense, req->sense, req->sense_len);
1353 req->dev->sense_len = req->sense_len;
1354 req->dev->sense_is_ua = (req->ops == &reqops_unit_attention);
1356 req->dev->sense_len = 0;
1357 req->dev->sense_is_ua = false;
1361 * Unit attention state is now stored in the device's sense buffer
1362 * if the HBA didn't do autosense. Clear the pending unit attention
1365 scsi_clear_unit_attention(req);
1368 scsi_req_dequeue(req);
1369 req->bus->info->complete(req, req->status, req->resid);
1370 scsi_req_unref(req);
1373 void scsi_req_cancel(SCSIRequest *req)
1375 if (!req->enqueued) {
1379 scsi_req_dequeue(req);
1380 req->io_canceled = true;
1381 if (req->ops->cancel_io) {
1382 req->ops->cancel_io(req);
1384 if (req->bus->info->cancel) {
1385 req->bus->info->cancel(req);
1387 scsi_req_unref(req);
1390 void scsi_req_abort(SCSIRequest *req, int status)
1392 if (!req->enqueued) {
1396 scsi_req_dequeue(req);
1397 req->io_canceled = true;
1398 if (req->ops->cancel_io) {
1399 req->ops->cancel_io(req);
1401 scsi_req_complete(req, status);
1402 scsi_req_unref(req);
1405 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense)
1409 while (!QTAILQ_EMPTY(&sdev->requests)) {
1410 req = QTAILQ_FIRST(&sdev->requests);
1411 scsi_req_cancel(req);
1413 sdev->unit_attention = sense;
1416 static char *scsibus_get_fw_dev_path(DeviceState *dev)
1418 SCSIDevice *d = SCSI_DEVICE(dev);
1421 snprintf(path, sizeof(path), "channel@%x/%s@%x,%x", d->channel,
1422 qdev_fw_name(dev), d->id, d->lun);
1424 return strdup(path);
1427 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun)
1430 SCSIDevice *target_dev = NULL;
1432 QTAILQ_FOREACH_REVERSE(qdev, &bus->qbus.children, ChildrenHead, sibling) {
1433 SCSIDevice *dev = SCSI_DEVICE(qdev);
1435 if (dev->channel == channel && dev->id == id) {
1436 if (dev->lun == lun) {
1445 static void scsi_device_class_init(ObjectClass *klass, void *data)
1447 DeviceClass *k = DEVICE_CLASS(klass);
1448 k->bus_info = &scsi_bus_info;
1449 k->init = scsi_qdev_init;
1450 k->unplug = qdev_simple_unplug_cb;
1451 k->exit = scsi_qdev_exit;
1454 static TypeInfo scsi_device_type_info = {
1455 .name = TYPE_SCSI_DEVICE,
1456 .parent = TYPE_DEVICE,
1457 .instance_size = sizeof(SCSIDevice),
1459 .class_size = sizeof(SCSIDeviceClass),
1460 .class_init = scsi_device_class_init,
1463 static void scsi_register_types(void)
1465 type_register_static(&scsi_device_type_info);
1468 type_init(scsi_register_types)