diff options
Diffstat (limited to 'hw/scsi-bus.c')
| -rw-r--r-- | hw/scsi-bus.c | 1889 |
1 files changed, 0 insertions, 1889 deletions
diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c deleted file mode 100644 index ac2093a5ef..0000000000 --- a/hw/scsi-bus.c +++ /dev/null @@ -1,1889 +0,0 @@ -#include "hw/hw.h" -#include "qemu/error-report.h" -#include "hw/scsi.h" -#include "hw/scsi-defs.h" -#include "hw/qdev.h" -#include "sysemu/blockdev.h" -#include "trace.h" -#include "sysemu/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 Property scsi_props[] = { - 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 void scsi_bus_class_init(ObjectClass *klass, void *data) -{ - BusClass *k = BUS_CLASS(klass); - - k->get_dev_path = scsibus_get_dev_path; - k->get_fw_dev_path = scsibus_get_fw_dev_path; -} - -static const TypeInfo scsi_bus_info = { - .name = TYPE_SCSI_BUS, - .parent = TYPE_BUS, - .instance_size = sizeof(SCSIBus), - .class_init = scsi_bus_class_init, -}; -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, TYPE_SCSI_BUS, 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); - } - - if (bus->info->hotplug) { - bus->info->hotplug(bus, 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 *serial) -{ - 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 (object_property_find(OBJECT(dev), "removable", NULL)) { - qdev_prop_set_bit(dev, "removable", removable); - } - if (serial) { - qdev_prop_set_string(dev, "serial", serial); - } - 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, NULL)) { - res = -1; - break; - } - } - loc_pop(&loc); - return res; -} - -static int32_t scsi_invalid_field(SCSIRequest *req, uint8_t *buf) -{ - scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); - scsi_req_complete(req, CHECK_CONDITION); - return 0; -} - -static const struct SCSIReqOps reqops_invalid_field = { - .size = sizeof(SCSIRequest), - .send_command = scsi_invalid_field -}; - -/* 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->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) -{ - BusChild *kid; - 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(kid, &r->req.bus->qbus.children, sibling) { - DeviceState *qdev = kid->child; - 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(kid, &r->req.bus->qbus.children, sibling) { - DeviceState *qdev = kid->child; - 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]; - 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 */ - 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); - pstrcpy((char *) &r->buf[32], 4, qemu_get_version()); - } - 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: - 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 (cmd.xfer > INT32_MAX) { - req = scsi_req_alloc(&reqops_invalid_field, d, tag, lun, hba_private); - } else 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)) { - 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] = 0x70; - 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 ata_passthrough_xfer_unit(SCSIDevice *dev, uint8_t *buf) -{ - int byte_block = (buf[2] >> 2) & 0x1; - int type = (buf[2] >> 4) & 0x1; - int xfer_unit; - - if (byte_block) { - if (type) { - xfer_unit = dev->blocksize; - } else { - xfer_unit = 512; - } - } else { - xfer_unit = 1; - } - - return xfer_unit; -} - -static int ata_passthrough_12_xfer_size(SCSIDevice *dev, uint8_t *buf) -{ - int length = buf[2] & 0x3; - int xfer; - int unit = ata_passthrough_xfer_unit(dev, buf); - - switch (length) { - case 0: - case 3: /* USB-specific. */ - default: - xfer = 0; - break; - case 1: - xfer = buf[3]; - break; - case 2: - xfer = buf[4]; - break; - } - - return xfer * unit; -} - -static int ata_passthrough_16_xfer_size(SCSIDevice *dev, uint8_t *buf) -{ - int extend = buf[1] & 0x1; - int length = buf[2] & 0x3; - int xfer; - int unit = ata_passthrough_xfer_unit(dev, buf); - - switch (length) { - case 0: - case 3: /* USB-specific. */ - default: - xfer = 0; - break; - case 1: - xfer = buf[4]; - xfer |= (extend ? buf[3] << 8 : 0); - break; - case 2: - xfer = buf[6]; - xfer |= (extend ? buf[5] << 8 : 0); - break; - } - - return xfer * unit; -} - -uint32_t scsi_data_cdb_length(uint8_t *buf) -{ - if ((buf[0] >> 5) == 0 && buf[4] == 0) { - return 256; - } else { - return scsi_cdb_length(buf); - } -} - -uint32_t scsi_cdb_length(uint8_t *buf) -{ - switch (buf[0] >> 5) { - case 0: - return buf[4]; - break; - case 1: - case 2: - return lduw_be_p(&buf[7]); - break; - case 4: - return ldl_be_p(&buf[10]) & 0xffffffffULL; - break; - case 5: - return ldl_be_p(&buf[6]) & 0xffffffffULL; - break; - default: - return -1; - } -} - -static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) -{ - cmd->xfer = scsi_cdb_length(buf); - 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 SET_CD_SPEED: - case SET_LIMITS: - case WRITE_LONG_10: - 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: - case WRITE_SAME_16: - cmd->xfer = dev->blocksize; - 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_6: - /* length 0 means 256 blocks */ - if (cmd->xfer == 0) { - cmd->xfer = 256; - } - case WRITE_10: - case WRITE_VERIFY_10: - case WRITE_12: - case WRITE_VERIFY_12: - case WRITE_16: - case WRITE_VERIFY_16: - cmd->xfer *= dev->blocksize; - break; - case READ_6: - case READ_REVERSE: - /* length 0 means 256 blocks */ - if (cmd->xfer == 0) { - cmd->xfer = 256; - } - case READ_10: - 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; - case ATA_PASSTHROUGH_12: - if (dev->type == TYPE_ROM) { - /* BLANK command of MMC */ - cmd->xfer = 0; - } else { - cmd->xfer = ata_passthrough_12_xfer_size(dev, buf); - } - break; - case ATA_PASSTHROUGH_16: - cmd->xfer = ata_passthrough_16_xfer_size(dev, buf); - 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->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16); - if (buf[1] & 0x01) { /* fixed */ - cmd->xfer *= dev->blocksize; - } - break; - case READ_16: - case READ_REVERSE_16: - case VERIFY_16: - case WRITE_16: - cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16); - if (buf[1] & 0x01) { /* fixed */ - cmd->xfer *= dev->blocksize; - } - break; - case REWIND: - case LOAD_UNLOAD: - cmd->xfer = 0; - break; - case SPACE_16: - cmd->xfer = buf[13] | (buf[12] << 8); - break; - case READ_POSITION: - switch (buf[1] & 0x1f) /* operation code */ { - case SHORT_FORM_BLOCK_ID: - case SHORT_FORM_VENDOR_SPECIFIC: - cmd->xfer = 20; - break; - case LONG_FORM: - cmd->xfer = 32; - break; - case EXTENDED_FORM: - cmd->xfer = buf[8] | (buf[7] << 8); - break; - default: - return -1; - } - - 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 int scsi_req_medium_changer_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) -{ - switch (buf[0]) { - /* medium changer commands */ - case EXCHANGE_MEDIUM: - case INITIALIZE_ELEMENT_STATUS: - case INITIALIZE_ELEMENT_STATUS_WITH_RANGE: - case MOVE_MEDIUM: - case POSITION_TO_ELEMENT: - cmd->xfer = 0; - break; - case READ_ELEMENT_STATUS: - cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16); - break; - - /* generic commands */ - default: - return scsi_req_length(cmd, dev, buf); - } - return 0; -} - - -static void scsi_cmd_xfer_mode(SCSICommand *cmd) -{ - if (!cmd->xfer) { - cmd->mode = SCSI_XFER_NONE; - return; - } - 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 WRITE_SAME_16: - case UNMAP: - 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; - case ATA_PASSTHROUGH_12: - case ATA_PASSTHROUGH_16: - /* T_DIR */ - cmd->mode = (cmd->buf[2] & 0x8) ? - SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV; - break; - default: - cmd->mode = SCSI_XFER_FROM_DEV; - 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; - - switch (buf[0] >> 5) { - case 0: - cmd->len = 6; - break; - case 1: - case 2: - cmd->len = 10; - break; - case 4: - cmd->len = 16; - break; - case 5: - cmd->len = 12; - break; - default: - return -1; - } - - switch (dev->type) { - case TYPE_TAPE: - rc = scsi_req_stream_length(cmd, dev, buf); - break; - case TYPE_MEDIUM_CHANGER: - rc = scsi_req_medium_changer_length(cmd, dev, buf); - break; - default: - rc = scsi_req_length(cmd, dev, buf); - break; - } - - if (rc != 0) - return rc; - - memcpy(cmd->buf, buf, cmd->len); - scsi_cmd_xfer_mode(cmd); - cmd->lba = scsi_cmd_lba(cmd); - return 0; -} - -void scsi_device_report_change(SCSIDevice *dev, SCSISense sense) -{ - SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); - - scsi_device_set_ua(dev, sense); - if (bus->info->change) { - bus->info->change(bus, dev, sense); - } -} - -/* - * 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 = 0x02 -}; - -/* 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, Invalid field in parameter list */ -const struct SCSISense sense_code_INVALID_PARAM = { - .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00 -}; - -/* Illegal request, Parameter list length error */ -const struct SCSISense sense_code_INVALID_PARAM_LEN = { - .key = ILLEGAL_REQUEST, .asc = 0x1a, .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 = 0x02 -}; - -/* 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, Capacity data has changed */ -const struct SCSISense sense_code_CAPACITY_CHANGED = { - .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09 -}; - -/* 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 -}; - -/* Data Protection, Write Protected */ -const struct SCSISense sense_code_WRITE_PROTECTED = { - .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00 -}; - -/* - * 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] = 0x70; - 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/INITIALIZE ELEMENT STATUS", - /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */ - [ 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/LOAD_UNLOAD", - /* LOAD_UNLOAD and START_STOP use the same operation code */ - [ 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/POSITION_TO_ELEMENT", - /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */ - [ 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/INITIALIZE_ELEMENT_STATUS_WITH_RANGE", - /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */ - [ 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_16 ] = "ATA_PASSTHROUGH_16", - [ 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", - [ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12", - [ MOVE_MEDIUM ] = "MOVE_MEDIUM", - [ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM", - [ 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) -{ - assert(req->refcount > 0); - req->refcount++; - return req; -} - -void scsi_req_unref(SCSIRequest *req) -{ - assert(req->refcount > 0); - if (--req->refcount == 0) { - SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, req->dev->qdev.parent_bus); - if (bus->info->free_request && req->hba_private) { - bus->info->free_request(bus, req->hba_private); - } - 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) -{ - if (req->io_canceled) { - trace_scsi_req_continue_canceled(req->dev->id, req->lun, req->tag); - return; - } - 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) -{ - trace_scsi_req_cancel(req->dev->id, req->lun, req->tag); - 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); -} - -static int scsi_ua_precedence(SCSISense sense) -{ - if (sense.key != UNIT_ATTENTION) { - return INT_MAX; - } - if (sense.asc == 0x29 && sense.ascq == 0x04) { - /* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */ - return 1; - } else if (sense.asc == 0x3F && sense.ascq == 0x01) { - /* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */ - return 2; - } else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) { - /* These two go with "all others". */ - ; - } else if (sense.asc == 0x29 && sense.ascq <= 0x07) { - /* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0 - * POWER ON OCCURRED = 1 - * SCSI BUS RESET OCCURRED = 2 - * BUS DEVICE RESET FUNCTION OCCURRED = 3 - * I_T NEXUS LOSS OCCURRED = 7 - */ - return sense.ascq; - } else if (sense.asc == 0x2F && sense.ascq == 0x01) { - /* COMMANDS CLEARED BY POWER LOSS NOTIFICATION */ - return 8; - } - return (sense.asc << 8) | sense.ascq; -} - -void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense) -{ - int prec1, prec2; - if (sense.key != UNIT_ATTENTION) { - return; - } - trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key, - sense.asc, sense.ascq); - - /* - * Override a pre-existing unit attention condition, except for a more - * important reset condition. - */ - prec1 = scsi_ua_precedence(sdev->unit_attention); - prec2 = scsi_ua_precedence(sense); - if (prec2 < prec1) { - sdev->unit_attention = sense; - } -} - -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); - } - - scsi_device_set_ua(sdev, sense); -} - -static char *scsibus_get_dev_path(DeviceState *dev) -{ - SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev); - DeviceState *hba = dev->parent_bus->parent; - char *id; - char *path; - - id = qdev_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); - return g_strdup_printf("channel@%x/%s@%x,%x", d->channel, - qdev_fw_name(dev), d->id, d->lun); -} - -SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun) -{ - BusChild *kid; - SCSIDevice *target_dev = NULL; - - QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, ChildrenHead, sibling) { - DeviceState *qdev = kid->child; - 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->enqueued); - - qemu_put_sbyte(f, req->retry ? 1 : 2); - 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); - int8_t sbyte; - - while ((sbyte = qemu_get_sbyte(f)) > 0) { - 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); - req->retry = (sbyte == 1); - 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. */ - 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; -} - -static int scsi_qdev_unplug(DeviceState *qdev) -{ - SCSIDevice *dev = SCSI_DEVICE(qdev); - SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); - - if (bus->info->hot_unplug) { - bus->info->hot_unplug(bus, dev); - } - return qdev_simple_unplug_cb(qdev); -} - -static 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_type = TYPE_SCSI_BUS; - k->init = scsi_qdev_init; - k->unplug = scsi_qdev_unplug; - k->exit = scsi_qdev_exit; - k->props = scsi_props; -} - -static const 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_bus_info); - type_register_static(&scsi_device_type_info); -} - -type_init(scsi_register_types) |