hw: move target-independent files to subdirectories

This patch tackles all files that are compiled once, moving
them to subdirectories of hw/.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 1889 deletions

diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
deleted file mode 100644
index 6239ee1465..0000000000
--- a/hw/scsi-bus.c
+++ /dev/null
@@ -1,1889 +0,0 @@
-#include "hw/hw.h"
-#include "qemu/error-report.h"
-#include "hw/scsi/scsi.h"
-#include "block/scsi.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)