| #include "hw.h" |
| #include "qemu-error.h" |
| #include "scsi.h" |
| #include "scsi-defs.h" |
| #include "qdev.h" |
| #include "blockdev.h" |
| #include "trace.h" |
| #include "dma.h" |
| |
| static char *scsibus_get_dev_path(DeviceState *dev); |
| static char *scsibus_get_fw_dev_path(DeviceState *dev); |
| static int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf); |
| static void scsi_req_dequeue(SCSIRequest *req); |
| |
| static struct BusInfo scsi_bus_info = { |
| .name = "SCSI", |
| .size = sizeof(SCSIBus), |
| .get_dev_path = scsibus_get_dev_path, |
| .get_fw_dev_path = scsibus_get_fw_dev_path, |
| .props = (Property[]) { |
| DEFINE_PROP_UINT32("channel", SCSIDevice, channel, 0), |
| DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1), |
| DEFINE_PROP_UINT32("lun", SCSIDevice, lun, -1), |
| DEFINE_PROP_END_OF_LIST(), |
| }, |
| }; |
| static int next_scsi_bus; |
| |
| static int scsi_device_init(SCSIDevice *s) |
| { |
| SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); |
| if (sc->init) { |
| return sc->init(s); |
| } |
| return 0; |
| } |
| |
| static void scsi_device_destroy(SCSIDevice *s) |
| { |
| SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); |
| if (sc->destroy) { |
| sc->destroy(s); |
| } |
| } |
| |
| static SCSIRequest *scsi_device_alloc_req(SCSIDevice *s, uint32_t tag, uint32_t lun, |
| uint8_t *buf, void *hba_private) |
| { |
| SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); |
| if (sc->alloc_req) { |
| return sc->alloc_req(s, tag, lun, buf, hba_private); |
| } |
| |
| return NULL; |
| } |
| |
| static void scsi_device_unit_attention_reported(SCSIDevice *s) |
| { |
| SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); |
| if (sc->unit_attention_reported) { |
| sc->unit_attention_reported(s); |
| } |
| } |
| |
| /* Create a scsi bus, and attach devices to it. */ |
| void scsi_bus_new(SCSIBus *bus, DeviceState *host, const SCSIBusInfo *info) |
| { |
| qbus_create_inplace(&bus->qbus, &scsi_bus_info, host, NULL); |
| bus->busnr = next_scsi_bus++; |
| bus->info = info; |
| bus->qbus.allow_hotplug = 1; |
| } |
| |
| static void scsi_dma_restart_bh(void *opaque) |
| { |
| SCSIDevice *s = opaque; |
| SCSIRequest *req, *next; |
| |
| qemu_bh_delete(s->bh); |
| s->bh = NULL; |
| |
| QTAILQ_FOREACH_SAFE(req, &s->requests, next, next) { |
| scsi_req_ref(req); |
| if (req->retry) { |
| req->retry = false; |
| switch (req->cmd.mode) { |
| case SCSI_XFER_FROM_DEV: |
| case SCSI_XFER_TO_DEV: |
| scsi_req_continue(req); |
| break; |
| case SCSI_XFER_NONE: |
| assert(!req->sg); |
| scsi_req_dequeue(req); |
| scsi_req_enqueue(req); |
| break; |
| } |
| } |
| scsi_req_unref(req); |
| } |
| } |
| |
| void scsi_req_retry(SCSIRequest *req) |
| { |
| /* No need to save a reference, because scsi_dma_restart_bh just |
| * looks at the request list. */ |
| req->retry = true; |
| } |
| |
| static void scsi_dma_restart_cb(void *opaque, int running, RunState state) |
| { |
| SCSIDevice *s = opaque; |
| |
| if (!running) { |
| return; |
| } |
| if (!s->bh) { |
| s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
| qemu_bh_schedule(s->bh); |
| } |
| } |
| |
| static int scsi_qdev_init(DeviceState *qdev) |
| { |
| SCSIDevice *dev = SCSI_DEVICE(qdev); |
| SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); |
| SCSIDevice *d; |
| int rc = -1; |
| |
| if (dev->channel > bus->info->max_channel) { |
| error_report("bad scsi channel id: %d", dev->channel); |
| goto err; |
| } |
| if (dev->id != -1 && dev->id > bus->info->max_target) { |
| error_report("bad scsi device id: %d", dev->id); |
| goto err; |
| } |
| if (dev->lun != -1 && dev->lun > bus->info->max_lun) { |
| error_report("bad scsi device lun: %d", dev->lun); |
| goto err; |
| } |
| |
| if (dev->id == -1) { |
| int id = -1; |
| if (dev->lun == -1) { |
| dev->lun = 0; |
| } |
| do { |
| d = scsi_device_find(bus, dev->channel, ++id, dev->lun); |
| } while (d && d->lun == dev->lun && id < bus->info->max_target); |
| if (d && d->lun == dev->lun) { |
| error_report("no free target"); |
| goto err; |
| } |
| dev->id = id; |
| } else if (dev->lun == -1) { |
| int lun = -1; |
| do { |
| d = scsi_device_find(bus, dev->channel, dev->id, ++lun); |
| } while (d && d->lun == lun && lun < bus->info->max_lun); |
| if (d && d->lun == lun) { |
| error_report("no free lun"); |
| goto err; |
| } |
| dev->lun = lun; |
| } else { |
| d = scsi_device_find(bus, dev->channel, dev->id, dev->lun); |
| assert(d); |
| if (d->lun == dev->lun && dev != d) { |
| qdev_free(&d->qdev); |
| } |
| } |
| |
| QTAILQ_INIT(&dev->requests); |
| rc = scsi_device_init(dev); |
| if (rc == 0) { |
| dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb, |
| dev); |
| } |
| |
| err: |
| return rc; |
| } |
| |
| static int scsi_qdev_exit(DeviceState *qdev) |
| { |
| SCSIDevice *dev = SCSI_DEVICE(qdev); |
| |
| if (dev->vmsentry) { |
| qemu_del_vm_change_state_handler(dev->vmsentry); |
| } |
| scsi_device_destroy(dev); |
| return 0; |
| } |
| |
| /* handle legacy '-drive if=scsi,...' cmd line args */ |
| SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv, |
| int unit, bool removable, int bootindex) |
| { |
| const char *driver; |
| DeviceState *dev; |
| |
| driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk"; |
| dev = qdev_create(&bus->qbus, driver); |
| qdev_prop_set_uint32(dev, "scsi-id", unit); |
| if (bootindex >= 0) { |
| qdev_prop_set_int32(dev, "bootindex", bootindex); |
| } |
| if (qdev_prop_exists(dev, "removable")) { |
| qdev_prop_set_bit(dev, "removable", removable); |
| } |
| if (qdev_prop_set_drive(dev, "drive", bdrv) < 0) { |
| qdev_free(dev); |
| return NULL; |
| } |
| if (qdev_init(dev) < 0) |
| return NULL; |
| return SCSI_DEVICE(dev); |
| } |
| |
| int scsi_bus_legacy_handle_cmdline(SCSIBus *bus) |
| { |
| Location loc; |
| DriveInfo *dinfo; |
| int res = 0, unit; |
| |
| loc_push_none(&loc); |
| for (unit = 0; unit <= bus->info->max_target; unit++) { |
| dinfo = drive_get(IF_SCSI, bus->busnr, unit); |
| if (dinfo == NULL) { |
| continue; |
| } |
| qemu_opts_loc_restore(dinfo->opts); |
| if (!scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit, false, -1)) { |
| res = -1; |
| break; |
| } |
| } |
| loc_pop(&loc); |
| return res; |
| } |
| |
| /* SCSIReqOps implementation for invalid commands. */ |
| |
| static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf) |
| { |
| scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE)); |
| scsi_req_complete(req, CHECK_CONDITION); |
| return 0; |
| } |
| |
| static const struct SCSIReqOps reqops_invalid_opcode = { |
| .size = sizeof(SCSIRequest), |
| .send_command = scsi_invalid_command |
| }; |
| |
| /* SCSIReqOps implementation for unit attention conditions. */ |
| |
| static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf) |
| { |
| if (req->dev && req->dev->unit_attention.key == UNIT_ATTENTION) { |
| scsi_req_build_sense(req, req->dev->unit_attention); |
| } else if (req->bus->unit_attention.key == UNIT_ATTENTION) { |
| scsi_req_build_sense(req, req->bus->unit_attention); |
| } |
| scsi_req_complete(req, CHECK_CONDITION); |
| return 0; |
| } |
| |
| static const struct SCSIReqOps reqops_unit_attention = { |
| .size = sizeof(SCSIRequest), |
| .send_command = scsi_unit_attention |
| }; |
| |
| /* SCSIReqOps implementation for REPORT LUNS and for commands sent to |
| an invalid LUN. */ |
| |
| typedef struct SCSITargetReq SCSITargetReq; |
| |
| struct SCSITargetReq { |
| SCSIRequest req; |
| int len; |
| uint8_t buf[2056]; |
| }; |
| |
| static void store_lun(uint8_t *outbuf, int lun) |
| { |
| if (lun < 256) { |
| outbuf[1] = lun; |
| return; |
| } |
| outbuf[1] = (lun & 255); |
| outbuf[0] = (lun >> 8) | 0x40; |
| } |
| |
| static bool scsi_target_emulate_report_luns(SCSITargetReq *r) |
| { |
| DeviceState *qdev; |
| int i, len, n; |
| int channel, id; |
| bool found_lun0; |
| |
| if (r->req.cmd.xfer < 16) { |
| return false; |
| } |
| if (r->req.cmd.buf[2] > 2) { |
| return false; |
| } |
| channel = r->req.dev->channel; |
| id = r->req.dev->id; |
| found_lun0 = false; |
| n = 0; |
| QTAILQ_FOREACH(qdev, &r->req.bus->qbus.children, sibling) { |
| SCSIDevice *dev = SCSI_DEVICE(qdev); |
| |
| if (dev->channel == channel && dev->id == id) { |
| if (dev->lun == 0) { |
| found_lun0 = true; |
| } |
| n += 8; |
| } |
| } |
| if (!found_lun0) { |
| n += 8; |
| } |
| len = MIN(n + 8, r->req.cmd.xfer & ~7); |
| if (len > sizeof(r->buf)) { |
| /* TODO: > 256 LUNs? */ |
| return false; |
| } |
| |
| memset(r->buf, 0, len); |
| stl_be_p(&r->buf, n); |
| i = found_lun0 ? 8 : 16; |
| QTAILQ_FOREACH(qdev, &r->req.bus->qbus.children, sibling) { |
| SCSIDevice *dev = SCSI_DEVICE(qdev); |
| |
| if (dev->channel == channel && dev->id == id) { |
| store_lun(&r->buf[i], dev->lun); |
| i += 8; |
| } |
| } |
| assert(i == n + 8); |
| r->len = len; |
| return true; |
| } |
| |
| static bool scsi_target_emulate_inquiry(SCSITargetReq *r) |
| { |
| assert(r->req.dev->lun != r->req.lun); |
| if (r->req.cmd.buf[1] & 0x2) { |
| /* Command support data - optional, not implemented */ |
| return false; |
| } |
| |
| if (r->req.cmd.buf[1] & 0x1) { |
| /* Vital product data */ |
| uint8_t page_code = r->req.cmd.buf[2]; |
| if (r->req.cmd.xfer < 4) { |
| return false; |
| } |
| |
| r->buf[r->len++] = page_code ; /* this page */ |
| r->buf[r->len++] = 0x00; |
| |
| switch (page_code) { |
| case 0x00: /* Supported page codes, mandatory */ |
| { |
| int pages; |
| pages = r->len++; |
| r->buf[r->len++] = 0x00; /* list of supported pages (this page) */ |
| r->buf[pages] = r->len - pages - 1; /* number of pages */ |
| break; |
| } |
| default: |
| return false; |
| } |
| /* done with EVPD */ |
| assert(r->len < sizeof(r->buf)); |
| r->len = MIN(r->req.cmd.xfer, r->len); |
| return true; |
| } |
| |
| /* Standard INQUIRY data */ |
| if (r->req.cmd.buf[2] != 0) { |
| return false; |
| } |
| |
| /* PAGE CODE == 0 */ |
| if (r->req.cmd.xfer < 5) { |
| return false; |
| } |
| |
| r->len = MIN(r->req.cmd.xfer, 36); |
| memset(r->buf, 0, r->len); |
| if (r->req.lun != 0) { |
| r->buf[0] = TYPE_NO_LUN; |
| } else { |
| r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE; |
| r->buf[2] = 5; /* Version */ |
| r->buf[3] = 2 | 0x10; /* HiSup, response data format */ |
| r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */ |
| r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ. */ |
| memcpy(&r->buf[8], "QEMU ", 8); |
| memcpy(&r->buf[16], "QEMU TARGET ", 16); |
| strncpy((char *) &r->buf[32], QEMU_VERSION, 4); |
| } |
| return true; |
| } |
| |
| static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf) |
| { |
| SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); |
| |
| switch (buf[0]) { |
| case REPORT_LUNS: |
| if (!scsi_target_emulate_report_luns(r)) { |
| goto illegal_request; |
| } |
| break; |
| case INQUIRY: |
| if (!scsi_target_emulate_inquiry(r)) { |
| goto illegal_request; |
| } |
| break; |
| case REQUEST_SENSE: |
| if (req->cmd.xfer < 4) { |
| goto illegal_request; |
| } |
| r->len = scsi_device_get_sense(r->req.dev, r->buf, |
| MIN(req->cmd.xfer, sizeof r->buf), |
| (req->cmd.buf[1] & 1) == 0); |
| if (r->req.dev->sense_is_ua) { |
| scsi_device_unit_attention_reported(req->dev); |
| r->req.dev->sense_len = 0; |
| r->req.dev->sense_is_ua = false; |
| } |
| break; |
| default: |
| scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED)); |
| scsi_req_complete(req, CHECK_CONDITION); |
| return 0; |
| illegal_request: |
| scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); |
| scsi_req_complete(req, CHECK_CONDITION); |
| return 0; |
| } |
| |
| if (!r->len) { |
| scsi_req_complete(req, GOOD); |
| } |
| return r->len; |
| } |
| |
| static void scsi_target_read_data(SCSIRequest *req) |
| { |
| SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); |
| uint32_t n; |
| |
| n = r->len; |
| if (n > 0) { |
| r->len = 0; |
| scsi_req_data(&r->req, n); |
| } else { |
| scsi_req_complete(&r->req, GOOD); |
| } |
| } |
| |
| static uint8_t *scsi_target_get_buf(SCSIRequest *req) |
| { |
| SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); |
| |
| return r->buf; |
| } |
| |
| static const struct SCSIReqOps reqops_target_command = { |
| .size = sizeof(SCSITargetReq), |
| .send_command = scsi_target_send_command, |
| .read_data = scsi_target_read_data, |
| .get_buf = scsi_target_get_buf, |
| }; |
| |
| |
| SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d, |
| uint32_t tag, uint32_t lun, void *hba_private) |
| { |
| SCSIRequest *req; |
| |
| req = g_malloc0(reqops->size); |
| req->refcount = 1; |
| req->bus = scsi_bus_from_device(d); |
| req->dev = d; |
| req->tag = tag; |
| req->lun = lun; |
| req->hba_private = hba_private; |
| req->status = -1; |
| req->sense_len = 0; |
| req->ops = reqops; |
| trace_scsi_req_alloc(req->dev->id, req->lun, req->tag); |
| return req; |
| } |
| |
| SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun, |
| uint8_t *buf, void *hba_private) |
| { |
| SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus); |
| SCSIRequest *req; |
| SCSICommand cmd; |
| |
| if (scsi_req_parse(&cmd, d, buf) != 0) { |
| trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]); |
| req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private); |
| } else { |
| trace_scsi_req_parsed(d->id, lun, tag, buf[0], |
| cmd.mode, cmd.xfer); |
| if (cmd.lba != -1) { |
| trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0], |
| cmd.lba); |
| } |
| |
| if ((d->unit_attention.key == UNIT_ATTENTION || |
| bus->unit_attention.key == UNIT_ATTENTION) && |
| (buf[0] != INQUIRY && |
| buf[0] != REPORT_LUNS && |
| buf[0] != GET_CONFIGURATION && |
| buf[0] != GET_EVENT_STATUS_NOTIFICATION && |
| |
| /* |
| * If we already have a pending unit attention condition, |
| * report this one before triggering another one. |
| */ |
| !(buf[0] == REQUEST_SENSE && d->sense_is_ua))) { |
| req = scsi_req_alloc(&reqops_unit_attention, d, tag, lun, |
| hba_private); |
| } else if (lun != d->lun || |
| buf[0] == REPORT_LUNS || |
| (buf[0] == REQUEST_SENSE && (d->sense_len || cmd.xfer < 4))) { |
| req = scsi_req_alloc(&reqops_target_command, d, tag, lun, |
| hba_private); |
| } else { |
| req = scsi_device_alloc_req(d, tag, lun, buf, hba_private); |
| } |
| } |
| |
| req->cmd = cmd; |
| req->resid = req->cmd.xfer; |
| |
| switch (buf[0]) { |
| case INQUIRY: |
| trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]); |
| break; |
| case TEST_UNIT_READY: |
| trace_scsi_test_unit_ready(d->id, lun, tag); |
| break; |
| case REPORT_LUNS: |
| trace_scsi_report_luns(d->id, lun, tag); |
| break; |
| case REQUEST_SENSE: |
| trace_scsi_request_sense(d->id, lun, tag); |
| break; |
| default: |
| break; |
| } |
| |
| return req; |
| } |
| |
| uint8_t *scsi_req_get_buf(SCSIRequest *req) |
| { |
| return req->ops->get_buf(req); |
| } |
| |
| static void scsi_clear_unit_attention(SCSIRequest *req) |
| { |
| SCSISense *ua; |
| if (req->dev->unit_attention.key != UNIT_ATTENTION && |
| req->bus->unit_attention.key != UNIT_ATTENTION) { |
| return; |
| } |
| |
| /* |
| * If an INQUIRY command enters the enabled command state, |
| * the device server shall [not] clear any unit attention condition; |
| * See also MMC-6, paragraphs 6.5 and 6.6.2. |
| */ |
| if (req->cmd.buf[0] == INQUIRY || |
| req->cmd.buf[0] == GET_CONFIGURATION || |
| req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) { |
| return; |
| } |
| |
| if (req->dev->unit_attention.key == UNIT_ATTENTION) { |
| ua = &req->dev->unit_attention; |
| } else { |
| ua = &req->bus->unit_attention; |
| } |
| |
| /* |
| * If a REPORT LUNS command enters the enabled command state, [...] |
| * the device server shall clear any pending unit attention condition |
| * with an additional sense code of REPORTED LUNS DATA HAS CHANGED. |
| */ |
| if (req->cmd.buf[0] == REPORT_LUNS && |
| !(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc && |
| ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) { |
| return; |
| } |
| |
| *ua = SENSE_CODE(NO_SENSE); |
| } |
| |
| int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len) |
| { |
| int ret; |
| |
| assert(len >= 14); |
| if (!req->sense_len) { |
| return 0; |
| } |
| |
| ret = scsi_build_sense(req->sense, req->sense_len, buf, len, true); |
| |
| /* |
| * FIXME: clearing unit attention conditions upon autosense should be done |
| * only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b |
| * (SAM-5, 5.14). |
| * |
| * We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and |
| * 10b for HBAs that do not support it (do not call scsi_req_get_sense). |
| * Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b. |
| */ |
| if (req->dev->sense_is_ua) { |
| scsi_device_unit_attention_reported(req->dev); |
| req->dev->sense_len = 0; |
| req->dev->sense_is_ua = false; |
| } |
| return ret; |
| } |
| |
| int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed) |
| { |
| return scsi_build_sense(dev->sense, dev->sense_len, buf, len, fixed); |
| } |
| |
| void scsi_req_build_sense(SCSIRequest *req, SCSISense sense) |
| { |
| trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag, |
| sense.key, sense.asc, sense.ascq); |
| memset(req->sense, 0, 18); |
| req->sense[0] = 0xf0; |
| req->sense[2] = sense.key; |
| req->sense[7] = 10; |
| req->sense[12] = sense.asc; |
| req->sense[13] = sense.ascq; |
| req->sense_len = 18; |
| } |
| |
| static void scsi_req_enqueue_internal(SCSIRequest *req) |
| { |
| assert(!req->enqueued); |
| scsi_req_ref(req); |
| if (req->bus->info->get_sg_list) { |
| req->sg = req->bus->info->get_sg_list(req); |
| } else { |
| req->sg = NULL; |
| } |
| req->enqueued = true; |
| QTAILQ_INSERT_TAIL(&req->dev->requests, req, next); |
| } |
| |
| int32_t scsi_req_enqueue(SCSIRequest *req) |
| { |
| int32_t rc; |
| |
| assert(!req->retry); |
| scsi_req_enqueue_internal(req); |
| scsi_req_ref(req); |
| rc = req->ops->send_command(req, req->cmd.buf); |
| scsi_req_unref(req); |
| return rc; |
| } |
| |
| static void scsi_req_dequeue(SCSIRequest *req) |
| { |
| trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag); |
| req->retry = false; |
| if (req->enqueued) { |
| QTAILQ_REMOVE(&req->dev->requests, req, next); |
| req->enqueued = false; |
| scsi_req_unref(req); |
| } |
| } |
| |
| static int scsi_get_performance_length(int num_desc, int type, int data_type) |
| { |
| /* MMC-6, paragraph 6.7. */ |
| switch (type) { |
| case 0: |
| if ((data_type & 3) == 0) { |
| /* Each descriptor is as in Table 295 - Nominal performance. */ |
| return 16 * num_desc + 8; |
| } else { |
| /* Each descriptor is as in Table 296 - Exceptions. */ |
| return 6 * num_desc + 8; |
| } |
| case 1: |
| case 4: |
| case 5: |
| return 8 * num_desc + 8; |
| case 2: |
| return 2048 * num_desc + 8; |
| case 3: |
| return 16 * num_desc + 8; |
| default: |
| return 8; |
| } |
| } |
| |
| static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) |
| { |
| switch (buf[0] >> 5) { |
| case 0: |
| cmd->xfer = buf[4]; |
| cmd->len = 6; |
| /* length 0 means 256 blocks */ |
| if (cmd->xfer == 0) { |
| cmd->xfer = 256; |
| } |
| break; |
| case 1: |
| case 2: |
| cmd->xfer = lduw_be_p(&buf[7]); |
| cmd->len = 10; |
| break; |
| case 4: |
| cmd->xfer = ldl_be_p(&buf[10]) & 0xffffffffULL; |
| cmd->len = 16; |
| break; |
| case 5: |
| cmd->xfer = ldl_be_p(&buf[6]) & 0xffffffffULL; |
| cmd->len = 12; |
| break; |
| default: |
| return -1; |
| } |
| |
| switch (buf[0]) { |
| case TEST_UNIT_READY: |
| case REWIND: |
| case START_STOP: |
| case SET_CAPACITY: |
| case WRITE_FILEMARKS: |
| case WRITE_FILEMARKS_16: |
| case SPACE: |
| case RESERVE: |
| case RELEASE: |
| case ERASE: |
| case ALLOW_MEDIUM_REMOVAL: |
| case VERIFY_10: |
| case SEEK_10: |
| case SYNCHRONIZE_CACHE: |
| case SYNCHRONIZE_CACHE_16: |
| case LOCATE_16: |
| case LOCK_UNLOCK_CACHE: |
| case LOAD_UNLOAD: |
| case SET_CD_SPEED: |
| case SET_LIMITS: |
| case WRITE_LONG_10: |
| case MOVE_MEDIUM: |
| case UPDATE_BLOCK: |
| case RESERVE_TRACK: |
| case SET_READ_AHEAD: |
| case PRE_FETCH: |
| case PRE_FETCH_16: |
| case ALLOW_OVERWRITE: |
| cmd->xfer = 0; |
| break; |
| case MODE_SENSE: |
| break; |
| case WRITE_SAME_10: |
| cmd->xfer = 1; |
| break; |
| case READ_CAPACITY_10: |
| cmd->xfer = 8; |
| break; |
| case READ_BLOCK_LIMITS: |
| cmd->xfer = 6; |
| break; |
| case SEND_VOLUME_TAG: |
| /* GPCMD_SET_STREAMING from multimedia commands. */ |
| if (dev->type == TYPE_ROM) { |
| cmd->xfer = buf[10] | (buf[9] << 8); |
| } else { |
| cmd->xfer = buf[9] | (buf[8] << 8); |
| } |
| break; |
| case WRITE_10: |
| case WRITE_VERIFY_10: |
| case WRITE_6: |
| case WRITE_12: |
| case WRITE_VERIFY_12: |
| case WRITE_16: |
| case WRITE_VERIFY_16: |
| cmd->xfer *= dev->blocksize; |
| break; |
| case READ_10: |
| case READ_6: |
| case READ_REVERSE: |
| case RECOVER_BUFFERED_DATA: |
| case READ_12: |
| case READ_16: |
| cmd->xfer *= dev->blocksize; |
| break; |
| case FORMAT_UNIT: |
| /* MMC mandates the parameter list to be 12-bytes long. Parameters |
| * for block devices are restricted to the header right now. */ |
| if (dev->type == TYPE_ROM && (buf[1] & 16)) { |
| cmd->xfer = 12; |
| } else { |
| cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4); |
| } |
| break; |
| case INQUIRY: |
| case RECEIVE_DIAGNOSTIC: |
| case SEND_DIAGNOSTIC: |
| cmd->xfer = buf[4] | (buf[3] << 8); |
| break; |
| case READ_CD: |
| case READ_BUFFER: |
| case WRITE_BUFFER: |
| case SEND_CUE_SHEET: |
| cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16); |
| break; |
| case PERSISTENT_RESERVE_OUT: |
| cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL; |
| break; |
| case ERASE_12: |
| if (dev->type == TYPE_ROM) { |
| /* MMC command GET PERFORMANCE. */ |
| cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8), |
| buf[10], buf[1] & 0x1f); |
| } |
| break; |
| case MECHANISM_STATUS: |
| case READ_DVD_STRUCTURE: |
| case SEND_DVD_STRUCTURE: |
| case MAINTENANCE_OUT: |
| case MAINTENANCE_IN: |
| if (dev->type == TYPE_ROM) { |
| /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */ |
| cmd->xfer = buf[9] | (buf[8] << 8); |
| } |
| break; |
| } |
| return 0; |
| } |
| |
| static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) |
| { |
| switch (buf[0]) { |
| /* stream commands */ |
| case ERASE_12: |
| case ERASE_16: |
| cmd->xfer = 0; |
| break; |
| case READ_6: |
| case READ_REVERSE: |
| case RECOVER_BUFFERED_DATA: |
| case WRITE_6: |
| cmd->len = 6; |
| cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16); |
| if (buf[1] & 0x01) { /* fixed */ |
| cmd->xfer *= dev->blocksize; |
| } |
| break; |
| case REWIND: |
| case START_STOP: |
| cmd->len = 6; |
| cmd->xfer = 0; |
| break; |
| case SPACE_16: |
| cmd->xfer = buf[13] | (buf[12] << 8); |
| break; |
| case READ_POSITION: |
| cmd->xfer = buf[8] | (buf[7] << 8); |
| break; |
| case FORMAT_UNIT: |
| cmd->xfer = buf[4] | (buf[3] << 8); |
| break; |
| /* generic commands */ |
| default: |
| return scsi_req_length(cmd, dev, buf); |
| } |
| return 0; |
| } |
| |
| static void scsi_cmd_xfer_mode(SCSICommand *cmd) |
| { |
| switch (cmd->buf[0]) { |
| case WRITE_6: |
| case WRITE_10: |
| case WRITE_VERIFY_10: |
| case WRITE_12: |
| case WRITE_VERIFY_12: |
| case WRITE_16: |
| case WRITE_VERIFY_16: |
| case COPY: |
| case COPY_VERIFY: |
| case COMPARE: |
| case CHANGE_DEFINITION: |
| case LOG_SELECT: |
| case MODE_SELECT: |
| case MODE_SELECT_10: |
| case SEND_DIAGNOSTIC: |
| case WRITE_BUFFER: |
| case FORMAT_UNIT: |
| case REASSIGN_BLOCKS: |
| case SEARCH_EQUAL: |
| case SEARCH_HIGH: |
| case SEARCH_LOW: |
| case UPDATE_BLOCK: |
| case WRITE_LONG_10: |
| case WRITE_SAME_10: |
| case SEARCH_HIGH_12: |
| case SEARCH_EQUAL_12: |
| case SEARCH_LOW_12: |
| case MEDIUM_SCAN: |
| case SEND_VOLUME_TAG: |
| case SEND_CUE_SHEET: |
| case SEND_DVD_STRUCTURE: |
| case PERSISTENT_RESERVE_OUT: |
| case MAINTENANCE_OUT: |
| cmd->mode = SCSI_XFER_TO_DEV; |
| break; |
| default: |
| if (cmd->xfer) |
| cmd->mode = SCSI_XFER_FROM_DEV; |
| else { |
| cmd->mode = SCSI_XFER_NONE; |
| } |
| break; |
| } |
| } |
| |
| static uint64_t scsi_cmd_lba(SCSICommand *cmd) |
| { |
| uint8_t *buf = cmd->buf; |
| uint64_t lba; |
| |
| switch (buf[0] >> 5) { |
| case 0: |
| lba = ldl_be_p(&buf[0]) & 0x1fffff; |
| break; |
| case 1: |
| case 2: |
| case 5: |
| lba = ldl_be_p(&buf[2]) & 0xffffffffULL; |
| break; |
| case 4: |
| lba = ldq_be_p(&buf[2]); |
| break; |
| default: |
| lba = -1; |
| |
| } |
| return lba; |
| } |
| |
| int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) |
| { |
| int rc; |
| |
| if (dev->type == TYPE_TAPE) { |
| rc = scsi_req_stream_length(cmd, dev, buf); |
| } else { |
| rc = scsi_req_length(cmd, dev, buf); |
| } |
| if (rc != 0) |
| return rc; |
| |
| memcpy(cmd->buf, buf, cmd->len); |
| scsi_cmd_xfer_mode(cmd); |
| cmd->lba = scsi_cmd_lba(cmd); |
| return 0; |
| } |
| |
| /* |
| * Predefined sense codes |
| */ |
| |
| /* No sense data available */ |
| const struct SCSISense sense_code_NO_SENSE = { |
| .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00 |
| }; |
| |
| /* LUN not ready, Manual intervention required */ |
| const struct SCSISense sense_code_LUN_NOT_READY = { |
| .key = NOT_READY, .asc = 0x04, .ascq = 0x03 |
| }; |
| |
| /* LUN not ready, Medium not present */ |
| const struct SCSISense sense_code_NO_MEDIUM = { |
| .key = NOT_READY, .asc = 0x3a, .ascq = 0x00 |
| }; |
| |
| /* LUN not ready, medium removal prevented */ |
| const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = { |
| .key = NOT_READY, .asc = 0x53, .ascq = 0x00 |
| }; |
| |
| /* Hardware error, internal target failure */ |
| const struct SCSISense sense_code_TARGET_FAILURE = { |
| .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00 |
| }; |
| |
| /* Illegal request, invalid command operation code */ |
| const struct SCSISense sense_code_INVALID_OPCODE = { |
| .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00 |
| }; |
| |
| /* Illegal request, LBA out of range */ |
| const struct SCSISense sense_code_LBA_OUT_OF_RANGE = { |
| .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00 |
| }; |
| |
| /* Illegal request, Invalid field in CDB */ |
| const struct SCSISense sense_code_INVALID_FIELD = { |
| .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00 |
| }; |
| |
| /* Illegal request, LUN not supported */ |
| const struct SCSISense sense_code_LUN_NOT_SUPPORTED = { |
| .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00 |
| }; |
| |
| /* Illegal request, Saving parameters not supported */ |
| const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = { |
| .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00 |
| }; |
| |
| /* Illegal request, Incompatible medium installed */ |
| const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = { |
| .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00 |
| }; |
| |
| /* Illegal request, medium removal prevented */ |
| const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = { |
| .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x00 |
| }; |
| |
| /* Command aborted, I/O process terminated */ |
| const struct SCSISense sense_code_IO_ERROR = { |
| .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06 |
| }; |
| |
| /* Command aborted, I_T Nexus loss occurred */ |
| const struct SCSISense sense_code_I_T_NEXUS_LOSS = { |
| .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07 |
| }; |
| |
| /* Command aborted, Logical Unit failure */ |
| const struct SCSISense sense_code_LUN_FAILURE = { |
| .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01 |
| }; |
| |
| /* Unit attention, Power on, reset or bus device reset occurred */ |
| const struct SCSISense sense_code_RESET = { |
| .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00 |
| }; |
| |
| /* Unit attention, No medium */ |
| const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = { |
| .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00 |
| }; |
| |
| /* Unit attention, Medium may have changed */ |
| const struct SCSISense sense_code_MEDIUM_CHANGED = { |
| .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00 |
| }; |
| |
| /* Unit attention, Reported LUNs data has changed */ |
| const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = { |
| .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e |
| }; |
| |
| /* Unit attention, Device internal reset */ |
| const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = { |
| .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04 |
| }; |
| |
| /* |
| * scsi_build_sense |
| * |
| * Convert between fixed and descriptor sense buffers |
| */ |
| int scsi_build_sense(uint8_t *in_buf, int in_len, |
| uint8_t *buf, int len, bool fixed) |
| { |
| bool fixed_in; |
| SCSISense sense; |
| if (!fixed && len < 8) { |
| return 0; |
| } |
| |
| if (in_len == 0) { |
| sense.key = NO_SENSE; |
| sense.asc = 0; |
| sense.ascq = 0; |
| } else { |
| fixed_in = (in_buf[0] & 2) == 0; |
| |
| if (fixed == fixed_in) { |
| memcpy(buf, in_buf, MIN(len, in_len)); |
| return MIN(len, in_len); |
| } |
| |
| if (fixed_in) { |
| sense.key = in_buf[2]; |
| sense.asc = in_buf[12]; |
| sense.ascq = in_buf[13]; |
| } else { |
| sense.key = in_buf[1]; |
| sense.asc = in_buf[2]; |
| sense.ascq = in_buf[3]; |
| } |
| } |
| |
| memset(buf, 0, len); |
| if (fixed) { |
| /* Return fixed format sense buffer */ |
| buf[0] = 0xf0; |
| buf[2] = sense.key; |
| buf[7] = 10; |
| buf[12] = sense.asc; |
| buf[13] = sense.ascq; |
| return MIN(len, 18); |
| } else { |
| /* Return descriptor format sense buffer */ |
| buf[0] = 0x72; |
| buf[1] = sense.key; |
| buf[2] = sense.asc; |
| buf[3] = sense.ascq; |
| return 8; |
| } |
| } |
| |
| static const char *scsi_command_name(uint8_t cmd) |
| { |
| static const char *names[] = { |
| [ TEST_UNIT_READY ] = "TEST_UNIT_READY", |
| [ REWIND ] = "REWIND", |
| [ REQUEST_SENSE ] = "REQUEST_SENSE", |
| [ FORMAT_UNIT ] = "FORMAT_UNIT", |
| [ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS", |
| [ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS", |
| [ READ_6 ] = "READ_6", |
| [ WRITE_6 ] = "WRITE_6", |
| [ SET_CAPACITY ] = "SET_CAPACITY", |
| [ READ_REVERSE ] = "READ_REVERSE", |
| [ WRITE_FILEMARKS ] = "WRITE_FILEMARKS", |
| [ SPACE ] = "SPACE", |
| [ INQUIRY ] = "INQUIRY", |
| [ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA", |
| [ MAINTENANCE_IN ] = "MAINTENANCE_IN", |
| [ MAINTENANCE_OUT ] = "MAINTENANCE_OUT", |
| [ MODE_SELECT ] = "MODE_SELECT", |
| [ RESERVE ] = "RESERVE", |
| [ RELEASE ] = "RELEASE", |
| [ COPY ] = "COPY", |
| [ ERASE ] = "ERASE", |
| [ MODE_SENSE ] = "MODE_SENSE", |
| [ START_STOP ] = "START_STOP", |
| [ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC", |
| [ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC", |
| [ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL", |
| [ READ_CAPACITY_10 ] = "READ_CAPACITY_10", |
| [ READ_10 ] = "READ_10", |
| [ WRITE_10 ] = "WRITE_10", |
| [ SEEK_10 ] = "SEEK_10", |
| [ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10", |
| [ VERIFY_10 ] = "VERIFY_10", |
| [ SEARCH_HIGH ] = "SEARCH_HIGH", |
| [ SEARCH_EQUAL ] = "SEARCH_EQUAL", |
| [ SEARCH_LOW ] = "SEARCH_LOW", |
| [ SET_LIMITS ] = "SET_LIMITS", |
| [ PRE_FETCH ] = "PRE_FETCH/READ_POSITION", |
| /* READ_POSITION and PRE_FETCH use the same operation code */ |
| [ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE", |
| [ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE", |
| [ READ_DEFECT_DATA ] = "READ_DEFECT_DATA", |
| [ MEDIUM_SCAN ] = "MEDIUM_SCAN", |
| [ COMPARE ] = "COMPARE", |
| [ COPY_VERIFY ] = "COPY_VERIFY", |
| [ WRITE_BUFFER ] = "WRITE_BUFFER", |
| [ READ_BUFFER ] = "READ_BUFFER", |
| [ UPDATE_BLOCK ] = "UPDATE_BLOCK", |
| [ READ_LONG_10 ] = "READ_LONG_10", |
| [ WRITE_LONG_10 ] = "WRITE_LONG_10", |
| [ CHANGE_DEFINITION ] = "CHANGE_DEFINITION", |
| [ WRITE_SAME_10 ] = "WRITE_SAME_10", |
| [ UNMAP ] = "UNMAP", |
| [ READ_TOC ] = "READ_TOC", |
| [ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT", |
| [ SANITIZE ] = "SANITIZE", |
| [ GET_CONFIGURATION ] = "GET_CONFIGURATION", |
| [ LOG_SELECT ] = "LOG_SELECT", |
| [ LOG_SENSE ] = "LOG_SENSE", |
| [ MODE_SELECT_10 ] = "MODE_SELECT_10", |
| [ RESERVE_10 ] = "RESERVE_10", |
| [ RELEASE_10 ] = "RELEASE_10", |
| [ MODE_SENSE_10 ] = "MODE_SENSE_10", |
| [ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN", |
| [ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT", |
| [ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16", |
| [ EXTENDED_COPY ] = "EXTENDED_COPY", |
| [ ATA_PASSTHROUGH ] = "ATA_PASSTHROUGH", |
| [ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN", |
| [ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT", |
| [ READ_16 ] = "READ_16", |
| [ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE", |
| [ WRITE_16 ] = "WRITE_16", |
| [ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16", |
| [ VERIFY_16 ] = "VERIFY_16", |
| [ PRE_FETCH_16 ] = "PRE_FETCH_16", |
| [ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16", |
| /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */ |
| [ LOCATE_16 ] = "LOCATE_16", |
| [ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16", |
| /* ERASE_16 and WRITE_SAME_16 use the same operation code */ |
| [ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16", |
| [ WRITE_LONG_16 ] = "WRITE_LONG_16", |
| [ REPORT_LUNS ] = "REPORT_LUNS", |
| [ BLANK ] = "BLANK", |
| [ MOVE_MEDIUM ] = "MOVE_MEDIUM", |
| [ LOAD_UNLOAD ] = "LOAD_UNLOAD", |
| [ READ_12 ] = "READ_12", |
| [ WRITE_12 ] = "WRITE_12", |
| [ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE", |
| /* ERASE_12 and GET_PERFORMANCE use the same operation code */ |
| [ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12", |
| [ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12", |
| [ VERIFY_12 ] = "VERIFY_12", |
| [ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12", |
| [ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12", |
| [ SEARCH_LOW_12 ] = "SEARCH_LOW_12", |
| [ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS", |
| [ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING", |
| /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */ |
| [ READ_CD ] = "READ_CD", |
| [ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12", |
| [ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE", |
| [ RESERVE_TRACK ] = "RESERVE_TRACK", |
| [ SEND_CUE_SHEET ] = "SEND_CUE_SHEET", |
| [ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE", |
| [ SET_CD_SPEED ] = "SET_CD_SPEED", |
| [ SET_READ_AHEAD ] = "SET_READ_AHEAD", |
| [ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE", |
| [ MECHANISM_STATUS ] = "MECHANISM_STATUS", |
| }; |
| |
| if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) |
| return "*UNKNOWN*"; |
| return names[cmd]; |
| } |
| |
| SCSIRequest *scsi_req_ref(SCSIRequest *req) |
| { |
| req->refcount++; |
| return req; |
| } |
| |
| void scsi_req_unref(SCSIRequest *req) |
| { |
| if (--req->refcount == 0) { |
| if (req->ops->free_req) { |
| req->ops->free_req(req); |
| } |
| g_free(req); |
| } |
| } |
| |
| /* Tell the device that we finished processing this chunk of I/O. It |
| will start the next chunk or complete the command. */ |
| void scsi_req_continue(SCSIRequest *req) |
| { |
| trace_scsi_req_continue(req->dev->id, req->lun, req->tag); |
| if (req->cmd.mode == SCSI_XFER_TO_DEV) { |
| req->ops->write_data(req); |
| } else { |
| req->ops->read_data(req); |
| } |
| } |
| |
| /* Called by the devices when data is ready for the HBA. The HBA should |
| start a DMA operation to read or fill the device's data buffer. |
| Once it completes, calling scsi_req_continue will restart I/O. */ |
| void scsi_req_data(SCSIRequest *req, int len) |
| { |
| uint8_t *buf; |
| if (req->io_canceled) { |
| trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len); |
| return; |
| } |
| trace_scsi_req_data(req->dev->id, req->lun, req->tag, len); |
| assert(req->cmd.mode != SCSI_XFER_NONE); |
| if (!req->sg) { |
| req->resid -= len; |
| req->bus->info->transfer_data(req, len); |
| return; |
| } |
| |
| /* If the device calls scsi_req_data and the HBA specified a |
| * scatter/gather list, the transfer has to happen in a single |
| * step. */ |
| assert(!req->dma_started); |
| req->dma_started = true; |
| |
| buf = scsi_req_get_buf(req); |
| if (req->cmd.mode == SCSI_XFER_FROM_DEV) { |
| req->resid = dma_buf_read(buf, len, req->sg); |
| } else { |
| req->resid = dma_buf_write(buf, len, req->sg); |
| } |
| scsi_req_continue(req); |
| } |
| |
| void scsi_req_print(SCSIRequest *req) |
| { |
| FILE *fp = stderr; |
| int i; |
| |
| fprintf(fp, "[%s id=%d] %s", |
| req->dev->qdev.parent_bus->name, |
| req->dev->id, |
| scsi_command_name(req->cmd.buf[0])); |
| for (i = 1; i < req->cmd.len; i++) { |
| fprintf(fp, " 0x%02x", req->cmd.buf[i]); |
| } |
| switch (req->cmd.mode) { |
| case SCSI_XFER_NONE: |
| fprintf(fp, " - none\n"); |
| break; |
| case SCSI_XFER_FROM_DEV: |
| fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer); |
| break; |
| case SCSI_XFER_TO_DEV: |
| fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer); |
| break; |
| default: |
| fprintf(fp, " - Oops\n"); |
| break; |
| } |
| } |
| |
| void scsi_req_complete(SCSIRequest *req, int status) |
| { |
| assert(req->status == -1); |
| req->status = status; |
| |
| assert(req->sense_len < sizeof(req->sense)); |
| if (status == GOOD) { |
| req->sense_len = 0; |
| } |
| |
| if (req->sense_len) { |
| memcpy(req->dev->sense, req->sense, req->sense_len); |
| req->dev->sense_len = req->sense_len; |
| req->dev->sense_is_ua = (req->ops == &reqops_unit_attention); |
| } else { |
| req->dev->sense_len = 0; |
| req->dev->sense_is_ua = false; |
| } |
| |
| /* |
| * Unit attention state is now stored in the device's sense buffer |
| * if the HBA didn't do autosense. Clear the pending unit attention |
| * flags. |
| */ |
| scsi_clear_unit_attention(req); |
| |
| scsi_req_ref(req); |
| scsi_req_dequeue(req); |
| req->bus->info->complete(req, req->status, req->resid); |
| scsi_req_unref(req); |
| } |
| |
| void scsi_req_cancel(SCSIRequest *req) |
| { |
| if (!req->enqueued) { |
| return; |
| } |
| scsi_req_ref(req); |
| scsi_req_dequeue(req); |
| req->io_canceled = true; |
| if (req->ops->cancel_io) { |
| req->ops->cancel_io(req); |
| } |
| if (req->bus->info->cancel) { |
| req->bus->info->cancel(req); |
| } |
| scsi_req_unref(req); |
| } |
| |
| void scsi_req_abort(SCSIRequest *req, int status) |
| { |
| if (!req->enqueued) { |
| return; |
| } |
| scsi_req_ref(req); |
| scsi_req_dequeue(req); |
| req->io_canceled = true; |
| if (req->ops->cancel_io) { |
| req->ops->cancel_io(req); |
| } |
| scsi_req_complete(req, status); |
| scsi_req_unref(req); |
| } |
| |
| void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense) |
| { |
| SCSIRequest *req; |
| |
| while (!QTAILQ_EMPTY(&sdev->requests)) { |
| req = QTAILQ_FIRST(&sdev->requests); |
| scsi_req_cancel(req); |
| } |
| sdev->unit_attention = sense; |
| } |
| |
| static char *scsibus_get_dev_path(DeviceState *dev) |
| { |
| SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev); |
| DeviceState *hba = dev->parent_bus->parent; |
| char *id = NULL; |
| char *path; |
| |
| if (hba && hba->parent_bus && hba->parent_bus->info->get_dev_path) { |
| id = hba->parent_bus->info->get_dev_path(hba); |
| } |
| if (id) { |
| path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun); |
| } else { |
| path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun); |
| } |
| g_free(id); |
| return path; |
| } |
| |
| static char *scsibus_get_fw_dev_path(DeviceState *dev) |
| { |
| SCSIDevice *d = SCSI_DEVICE(dev); |
| char path[100]; |
| |
| snprintf(path, sizeof(path), "channel@%x/%s@%x,%x", d->channel, |
| qdev_fw_name(dev), d->id, d->lun); |
| |
| return strdup(path); |
| } |
| |
| SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun) |
| { |
| DeviceState *qdev; |
| SCSIDevice *target_dev = NULL; |
| |
| QTAILQ_FOREACH_REVERSE(qdev, &bus->qbus.children, ChildrenHead, sibling) { |
| SCSIDevice *dev = SCSI_DEVICE(qdev); |
| |
| if (dev->channel == channel && dev->id == id) { |
| if (dev->lun == lun) { |
| return dev; |
| } |
| target_dev = dev; |
| } |
| } |
| return target_dev; |
| } |
| |
| /* SCSI request list. For simplicity, pv points to the whole device */ |
| |
| static void put_scsi_requests(QEMUFile *f, void *pv, size_t size) |
| { |
| SCSIDevice *s = pv; |
| SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); |
| SCSIRequest *req; |
| |
| QTAILQ_FOREACH(req, &s->requests, next) { |
| assert(!req->io_canceled); |
| assert(req->status == -1); |
| assert(req->retry); |
| assert(req->enqueued); |
| |
| qemu_put_sbyte(f, 1); |
| qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf)); |
| qemu_put_be32s(f, &req->tag); |
| qemu_put_be32s(f, &req->lun); |
| if (bus->info->save_request) { |
| bus->info->save_request(f, req); |
| } |
| if (req->ops->save_request) { |
| req->ops->save_request(f, req); |
| } |
| } |
| qemu_put_sbyte(f, 0); |
| } |
| |
| static int get_scsi_requests(QEMUFile *f, void *pv, size_t size) |
| { |
| SCSIDevice *s = pv; |
| SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); |
| |
| while (qemu_get_sbyte(f)) { |
| uint8_t buf[SCSI_CMD_BUF_SIZE]; |
| uint32_t tag; |
| uint32_t lun; |
| SCSIRequest *req; |
| |
| qemu_get_buffer(f, buf, sizeof(buf)); |
| qemu_get_be32s(f, &tag); |
| qemu_get_be32s(f, &lun); |
| req = scsi_req_new(s, tag, lun, buf, NULL); |
| if (bus->info->load_request) { |
| req->hba_private = bus->info->load_request(f, req); |
| } |
| if (req->ops->load_request) { |
| req->ops->load_request(f, req); |
| } |
| |
| /* Just restart it later. */ |
| req->retry = true; |
| scsi_req_enqueue_internal(req); |
| |
| /* At this point, the request will be kept alive by the reference |
| * added by scsi_req_enqueue_internal, so we can release our reference. |
| * The HBA of course will add its own reference in the load_request |
| * callback if it needs to hold on the SCSIRequest. |
| */ |
| scsi_req_unref(req); |
| } |
| |
| return 0; |
| } |
| |
| const VMStateInfo vmstate_info_scsi_requests = { |
| .name = "scsi-requests", |
| .get = get_scsi_requests, |
| .put = put_scsi_requests, |
| }; |
| |
| const VMStateDescription vmstate_scsi_device = { |
| .name = "SCSIDevice", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .minimum_version_id_old = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT8(unit_attention.key, SCSIDevice), |
| VMSTATE_UINT8(unit_attention.asc, SCSIDevice), |
| VMSTATE_UINT8(unit_attention.ascq, SCSIDevice), |
| VMSTATE_BOOL(sense_is_ua, SCSIDevice), |
| VMSTATE_UINT8_ARRAY(sense, SCSIDevice, SCSI_SENSE_BUF_SIZE), |
| VMSTATE_UINT32(sense_len, SCSIDevice), |
| { |
| .name = "requests", |
| .version_id = 0, |
| .field_exists = NULL, |
| .size = 0, /* ouch */ |
| .info = &vmstate_info_scsi_requests, |
| .flags = VMS_SINGLE, |
| .offset = 0, |
| }, |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static void scsi_device_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *k = DEVICE_CLASS(klass); |
| k->bus_info = &scsi_bus_info; |
| k->init = scsi_qdev_init; |
| k->unplug = qdev_simple_unplug_cb; |
| k->exit = scsi_qdev_exit; |
| } |
| |
| static TypeInfo scsi_device_type_info = { |
| .name = TYPE_SCSI_DEVICE, |
| .parent = TYPE_DEVICE, |
| .instance_size = sizeof(SCSIDevice), |
| .abstract = true, |
| .class_size = sizeof(SCSIDeviceClass), |
| .class_init = scsi_device_class_init, |
| }; |
| |
| static void scsi_register_types(void) |
| { |
| type_register_static(&scsi_device_type_info); |
| } |
| |
| type_init(scsi_register_types) |
