1631 lines
46 KiB
C
1631 lines
46 KiB
C
#include "hw.h"
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#include "qemu-error.h"
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#include "scsi.h"
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#include "scsi-defs.h"
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#include "qdev.h"
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#include "blockdev.h"
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#include "trace.h"
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#include "dma.h"
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static char *scsibus_get_dev_path(DeviceState *dev);
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static char *scsibus_get_fw_dev_path(DeviceState *dev);
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static int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf);
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static void scsi_req_dequeue(SCSIRequest *req);
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static Property scsi_props[] = {
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DEFINE_PROP_UINT32("channel", SCSIDevice, channel, 0),
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DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1),
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DEFINE_PROP_UINT32("lun", SCSIDevice, lun, -1),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void scsi_bus_class_init(ObjectClass *klass, void *data)
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{
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BusClass *k = BUS_CLASS(klass);
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k->get_dev_path = scsibus_get_dev_path;
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k->get_fw_dev_path = scsibus_get_fw_dev_path;
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}
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static const TypeInfo scsi_bus_info = {
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.name = TYPE_SCSI_BUS,
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.parent = TYPE_BUS,
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.instance_size = sizeof(SCSIBus),
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.class_init = scsi_bus_class_init,
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};
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static int next_scsi_bus;
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static int scsi_device_init(SCSIDevice *s)
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{
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SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
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if (sc->init) {
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return sc->init(s);
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}
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return 0;
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}
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static void scsi_device_destroy(SCSIDevice *s)
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{
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SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
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if (sc->destroy) {
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sc->destroy(s);
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}
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}
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static SCSIRequest *scsi_device_alloc_req(SCSIDevice *s, uint32_t tag, uint32_t lun,
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uint8_t *buf, void *hba_private)
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{
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SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
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if (sc->alloc_req) {
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return sc->alloc_req(s, tag, lun, buf, hba_private);
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}
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return NULL;
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}
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static void scsi_device_unit_attention_reported(SCSIDevice *s)
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{
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SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
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if (sc->unit_attention_reported) {
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sc->unit_attention_reported(s);
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}
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}
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/* Create a scsi bus, and attach devices to it. */
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void scsi_bus_new(SCSIBus *bus, DeviceState *host, const SCSIBusInfo *info)
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{
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qbus_create_inplace(&bus->qbus, TYPE_SCSI_BUS, host, NULL);
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bus->busnr = next_scsi_bus++;
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bus->info = info;
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bus->qbus.allow_hotplug = 1;
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}
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static void scsi_dma_restart_bh(void *opaque)
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{
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SCSIDevice *s = opaque;
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SCSIRequest *req, *next;
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qemu_bh_delete(s->bh);
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s->bh = NULL;
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QTAILQ_FOREACH_SAFE(req, &s->requests, next, next) {
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scsi_req_ref(req);
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if (req->retry) {
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req->retry = false;
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switch (req->cmd.mode) {
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case SCSI_XFER_FROM_DEV:
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case SCSI_XFER_TO_DEV:
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scsi_req_continue(req);
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break;
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case SCSI_XFER_NONE:
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assert(!req->sg);
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scsi_req_dequeue(req);
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scsi_req_enqueue(req);
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break;
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}
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}
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scsi_req_unref(req);
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}
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}
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void scsi_req_retry(SCSIRequest *req)
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{
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/* No need to save a reference, because scsi_dma_restart_bh just
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* looks at the request list. */
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req->retry = true;
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}
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static void scsi_dma_restart_cb(void *opaque, int running, RunState state)
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{
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SCSIDevice *s = opaque;
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if (!running) {
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return;
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}
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if (!s->bh) {
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s->bh = qemu_bh_new(scsi_dma_restart_bh, s);
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qemu_bh_schedule(s->bh);
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}
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}
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static int scsi_qdev_init(DeviceState *qdev)
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{
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SCSIDevice *dev = SCSI_DEVICE(qdev);
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
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SCSIDevice *d;
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int rc = -1;
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if (dev->channel > bus->info->max_channel) {
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error_report("bad scsi channel id: %d", dev->channel);
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goto err;
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}
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if (dev->id != -1 && dev->id > bus->info->max_target) {
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error_report("bad scsi device id: %d", dev->id);
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goto err;
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}
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if (dev->lun != -1 && dev->lun > bus->info->max_lun) {
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error_report("bad scsi device lun: %d", dev->lun);
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goto err;
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}
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if (dev->id == -1) {
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int id = -1;
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if (dev->lun == -1) {
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dev->lun = 0;
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}
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do {
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d = scsi_device_find(bus, dev->channel, ++id, dev->lun);
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} while (d && d->lun == dev->lun && id < bus->info->max_target);
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if (d && d->lun == dev->lun) {
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error_report("no free target");
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goto err;
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}
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dev->id = id;
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} else if (dev->lun == -1) {
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int lun = -1;
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do {
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d = scsi_device_find(bus, dev->channel, dev->id, ++lun);
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} while (d && d->lun == lun && lun < bus->info->max_lun);
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if (d && d->lun == lun) {
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error_report("no free lun");
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goto err;
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}
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dev->lun = lun;
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} else {
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d = scsi_device_find(bus, dev->channel, dev->id, dev->lun);
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assert(d);
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if (d->lun == dev->lun && dev != d) {
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qdev_free(&d->qdev);
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}
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}
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QTAILQ_INIT(&dev->requests);
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rc = scsi_device_init(dev);
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if (rc == 0) {
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dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb,
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dev);
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}
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err:
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return rc;
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}
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static int scsi_qdev_exit(DeviceState *qdev)
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{
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SCSIDevice *dev = SCSI_DEVICE(qdev);
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if (dev->vmsentry) {
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qemu_del_vm_change_state_handler(dev->vmsentry);
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}
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scsi_device_destroy(dev);
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return 0;
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}
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/* handle legacy '-drive if=scsi,...' cmd line args */
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SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
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int unit, bool removable, int bootindex)
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{
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const char *driver;
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DeviceState *dev;
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driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk";
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dev = qdev_create(&bus->qbus, driver);
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qdev_prop_set_uint32(dev, "scsi-id", unit);
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if (bootindex >= 0) {
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qdev_prop_set_int32(dev, "bootindex", bootindex);
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}
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if (object_property_find(OBJECT(dev), "removable", NULL)) {
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qdev_prop_set_bit(dev, "removable", removable);
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}
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if (qdev_prop_set_drive(dev, "drive", bdrv) < 0) {
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qdev_free(dev);
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return NULL;
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}
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if (qdev_init(dev) < 0)
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return NULL;
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return SCSI_DEVICE(dev);
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}
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int scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
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{
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Location loc;
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DriveInfo *dinfo;
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int res = 0, unit;
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loc_push_none(&loc);
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for (unit = 0; unit <= bus->info->max_target; unit++) {
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dinfo = drive_get(IF_SCSI, bus->busnr, unit);
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if (dinfo == NULL) {
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continue;
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}
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qemu_opts_loc_restore(dinfo->opts);
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if (!scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit, false, -1)) {
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res = -1;
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break;
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}
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}
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loc_pop(&loc);
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return res;
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}
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static int32_t scsi_invalid_field(SCSIRequest *req, uint8_t *buf)
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{
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scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD));
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scsi_req_complete(req, CHECK_CONDITION);
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return 0;
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}
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static const struct SCSIReqOps reqops_invalid_field = {
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.size = sizeof(SCSIRequest),
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.send_command = scsi_invalid_field
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};
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/* SCSIReqOps implementation for invalid commands. */
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static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf)
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{
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scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE));
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scsi_req_complete(req, CHECK_CONDITION);
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return 0;
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}
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static const struct SCSIReqOps reqops_invalid_opcode = {
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.size = sizeof(SCSIRequest),
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.send_command = scsi_invalid_command
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};
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/* SCSIReqOps implementation for unit attention conditions. */
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static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf)
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{
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if (req->dev && req->dev->unit_attention.key == UNIT_ATTENTION) {
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scsi_req_build_sense(req, req->dev->unit_attention);
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} else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
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scsi_req_build_sense(req, req->bus->unit_attention);
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}
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scsi_req_complete(req, CHECK_CONDITION);
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return 0;
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}
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static const struct SCSIReqOps reqops_unit_attention = {
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.size = sizeof(SCSIRequest),
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.send_command = scsi_unit_attention
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};
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/* SCSIReqOps implementation for REPORT LUNS and for commands sent to
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an invalid LUN. */
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typedef struct SCSITargetReq SCSITargetReq;
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struct SCSITargetReq {
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SCSIRequest req;
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int len;
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uint8_t buf[2056];
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};
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static void store_lun(uint8_t *outbuf, int lun)
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{
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if (lun < 256) {
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outbuf[1] = lun;
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return;
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}
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outbuf[1] = (lun & 255);
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outbuf[0] = (lun >> 8) | 0x40;
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}
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static bool scsi_target_emulate_report_luns(SCSITargetReq *r)
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{
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BusChild *kid;
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int i, len, n;
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int channel, id;
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bool found_lun0;
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if (r->req.cmd.xfer < 16) {
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return false;
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}
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if (r->req.cmd.buf[2] > 2) {
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return false;
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}
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channel = r->req.dev->channel;
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id = r->req.dev->id;
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found_lun0 = false;
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n = 0;
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QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) {
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DeviceState *qdev = kid->child;
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SCSIDevice *dev = SCSI_DEVICE(qdev);
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if (dev->channel == channel && dev->id == id) {
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if (dev->lun == 0) {
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found_lun0 = true;
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}
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n += 8;
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}
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}
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if (!found_lun0) {
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n += 8;
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}
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len = MIN(n + 8, r->req.cmd.xfer & ~7);
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if (len > sizeof(r->buf)) {
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/* TODO: > 256 LUNs? */
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return false;
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}
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memset(r->buf, 0, len);
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stl_be_p(&r->buf, n);
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i = found_lun0 ? 8 : 16;
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QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) {
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DeviceState *qdev = kid->child;
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SCSIDevice *dev = SCSI_DEVICE(qdev);
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if (dev->channel == channel && dev->id == id) {
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store_lun(&r->buf[i], dev->lun);
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i += 8;
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}
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}
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assert(i == n + 8);
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r->len = len;
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return true;
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}
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static bool scsi_target_emulate_inquiry(SCSITargetReq *r)
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{
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assert(r->req.dev->lun != r->req.lun);
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if (r->req.cmd.buf[1] & 0x2) {
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/* Command support data - optional, not implemented */
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return false;
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}
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if (r->req.cmd.buf[1] & 0x1) {
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/* Vital product data */
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uint8_t page_code = r->req.cmd.buf[2];
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r->buf[r->len++] = page_code ; /* this page */
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r->buf[r->len++] = 0x00;
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switch (page_code) {
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case 0x00: /* Supported page codes, mandatory */
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{
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int pages;
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pages = r->len++;
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r->buf[r->len++] = 0x00; /* list of supported pages (this page) */
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r->buf[pages] = r->len - pages - 1; /* number of pages */
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break;
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}
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default:
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return false;
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}
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/* done with EVPD */
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assert(r->len < sizeof(r->buf));
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r->len = MIN(r->req.cmd.xfer, r->len);
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return true;
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}
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/* Standard INQUIRY data */
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if (r->req.cmd.buf[2] != 0) {
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return false;
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}
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/* PAGE CODE == 0 */
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r->len = MIN(r->req.cmd.xfer, 36);
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memset(r->buf, 0, r->len);
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if (r->req.lun != 0) {
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r->buf[0] = TYPE_NO_LUN;
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} else {
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r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE;
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r->buf[2] = 5; /* Version */
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r->buf[3] = 2 | 0x10; /* HiSup, response data format */
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r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */
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r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ. */
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memcpy(&r->buf[8], "QEMU ", 8);
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memcpy(&r->buf[16], "QEMU TARGET ", 16);
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strncpy((char *) &r->buf[32], QEMU_VERSION, 4);
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}
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return true;
|
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}
|
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|
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static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
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{
|
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SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
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switch (buf[0]) {
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case REPORT_LUNS:
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if (!scsi_target_emulate_report_luns(r)) {
|
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goto illegal_request;
|
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}
|
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break;
|
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case INQUIRY:
|
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if (!scsi_target_emulate_inquiry(r)) {
|
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goto illegal_request;
|
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}
|
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break;
|
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case REQUEST_SENSE:
|
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r->len = scsi_device_get_sense(r->req.dev, r->buf,
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MIN(req->cmd.xfer, sizeof r->buf),
|
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(req->cmd.buf[1] & 1) == 0);
|
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if (r->req.dev->sense_is_ua) {
|
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scsi_device_unit_attention_reported(req->dev);
|
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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;
|
|
}
|
|
|
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static void scsi_target_read_data(SCSIRequest *req)
|
|
{
|
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SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
|
|
uint32_t n;
|
|
|
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n = r->len;
|
|
if (n > 0) {
|
|
r->len = 0;
|
|
scsi_req_data(&r->req, n);
|
|
} else {
|
|
scsi_req_complete(&r->req, GOOD);
|
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}
|
|
}
|
|
|
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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 scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
|
|
{
|
|
switch (buf[0] >> 5) {
|
|
case 0:
|
|
cmd->xfer = buf[4];
|
|
cmd->len = 6;
|
|
break;
|
|
case 1:
|
|
case 2:
|
|
cmd->xfer = lduw_be_p(&buf[7]);
|
|
cmd->len = 10;
|
|
break;
|
|
case 4:
|
|
cmd->xfer = ldl_be_p(&buf[10]) & 0xffffffffULL;
|
|
cmd->len = 16;
|
|
break;
|
|
case 5:
|
|
cmd->xfer = ldl_be_p(&buf[6]) & 0xffffffffULL;
|
|
cmd->len = 12;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
switch (buf[0]) {
|
|
case TEST_UNIT_READY:
|
|
case REWIND:
|
|
case START_STOP:
|
|
case SET_CAPACITY:
|
|
case WRITE_FILEMARKS:
|
|
case WRITE_FILEMARKS_16:
|
|
case SPACE:
|
|
case RESERVE:
|
|
case RELEASE:
|
|
case ERASE:
|
|
case ALLOW_MEDIUM_REMOVAL:
|
|
case VERIFY_10:
|
|
case SEEK_10:
|
|
case SYNCHRONIZE_CACHE:
|
|
case SYNCHRONIZE_CACHE_16:
|
|
case LOCATE_16:
|
|
case LOCK_UNLOCK_CACHE:
|
|
case LOAD_UNLOAD:
|
|
case SET_CD_SPEED:
|
|
case SET_LIMITS:
|
|
case WRITE_LONG_10:
|
|
case MOVE_MEDIUM:
|
|
case UPDATE_BLOCK:
|
|
case RESERVE_TRACK:
|
|
case SET_READ_AHEAD:
|
|
case PRE_FETCH:
|
|
case PRE_FETCH_16:
|
|
case ALLOW_OVERWRITE:
|
|
cmd->xfer = 0;
|
|
break;
|
|
case MODE_SENSE:
|
|
break;
|
|
case WRITE_SAME_10:
|
|
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;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
|
|
{
|
|
switch (buf[0]) {
|
|
/* stream commands */
|
|
case ERASE_12:
|
|
case ERASE_16:
|
|
cmd->xfer = 0;
|
|
break;
|
|
case READ_6:
|
|
case READ_REVERSE:
|
|
case RECOVER_BUFFERED_DATA:
|
|
case WRITE_6:
|
|
cmd->len = 6;
|
|
cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16);
|
|
if (buf[1] & 0x01) { /* fixed */
|
|
cmd->xfer *= dev->blocksize;
|
|
}
|
|
break;
|
|
case READ_16:
|
|
case READ_REVERSE_16:
|
|
case VERIFY_16:
|
|
case WRITE_16:
|
|
cmd->len = 16;
|
|
cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16);
|
|
if (buf[1] & 0x01) { /* fixed */
|
|
cmd->xfer *= dev->blocksize;
|
|
}
|
|
break;
|
|
case REWIND:
|
|
case START_STOP:
|
|
cmd->len = 6;
|
|
cmd->xfer = 0;
|
|
break;
|
|
case SPACE_16:
|
|
cmd->xfer = buf[13] | (buf[12] << 8);
|
|
break;
|
|
case READ_POSITION:
|
|
cmd->xfer = buf[8] | (buf[7] << 8);
|
|
break;
|
|
case FORMAT_UNIT:
|
|
cmd->xfer = buf[4] | (buf[3] << 8);
|
|
break;
|
|
/* generic commands */
|
|
default:
|
|
return scsi_req_length(cmd, dev, buf);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void scsi_cmd_xfer_mode(SCSICommand *cmd)
|
|
{
|
|
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:
|
|
case ATA_PASSTHROUGH:
|
|
cmd->mode = 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;
|
|
|
|
if (dev->type == TYPE_TAPE) {
|
|
rc = scsi_req_stream_length(cmd, dev, buf);
|
|
} else {
|
|
rc = scsi_req_length(cmd, dev, buf);
|
|
}
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
memcpy(cmd->buf, buf, cmd->len);
|
|
scsi_cmd_xfer_mode(cmd);
|
|
cmd->lba = scsi_cmd_lba(cmd);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Predefined sense codes
|
|
*/
|
|
|
|
/* No sense data available */
|
|
const struct SCSISense sense_code_NO_SENSE = {
|
|
.key = NO_SENSE , .asc = 0x00 , .ascq = 0x00
|
|
};
|
|
|
|
/* LUN not ready, Manual intervention required */
|
|
const struct SCSISense sense_code_LUN_NOT_READY = {
|
|
.key = NOT_READY, .asc = 0x04, .ascq = 0x03
|
|
};
|
|
|
|
/* LUN not ready, Medium not present */
|
|
const struct SCSISense sense_code_NO_MEDIUM = {
|
|
.key = NOT_READY, .asc = 0x3a, .ascq = 0x00
|
|
};
|
|
|
|
/* LUN not ready, medium removal prevented */
|
|
const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = {
|
|
.key = NOT_READY, .asc = 0x53, .ascq = 0x00
|
|
};
|
|
|
|
/* Hardware error, internal target failure */
|
|
const struct SCSISense sense_code_TARGET_FAILURE = {
|
|
.key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00
|
|
};
|
|
|
|
/* Illegal request, invalid command operation code */
|
|
const struct SCSISense sense_code_INVALID_OPCODE = {
|
|
.key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00
|
|
};
|
|
|
|
/* Illegal request, LBA out of range */
|
|
const struct SCSISense sense_code_LBA_OUT_OF_RANGE = {
|
|
.key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00
|
|
};
|
|
|
|
/* Illegal request, Invalid field in CDB */
|
|
const struct SCSISense sense_code_INVALID_FIELD = {
|
|
.key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00
|
|
};
|
|
|
|
/* Illegal request, LUN not supported */
|
|
const struct SCSISense sense_code_LUN_NOT_SUPPORTED = {
|
|
.key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00
|
|
};
|
|
|
|
/* Illegal request, Saving parameters not supported */
|
|
const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = {
|
|
.key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00
|
|
};
|
|
|
|
/* Illegal request, Incompatible medium installed */
|
|
const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = {
|
|
.key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00
|
|
};
|
|
|
|
/* Illegal request, medium removal prevented */
|
|
const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = {
|
|
.key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x00
|
|
};
|
|
|
|
/* Command aborted, I/O process terminated */
|
|
const struct SCSISense sense_code_IO_ERROR = {
|
|
.key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06
|
|
};
|
|
|
|
/* Command aborted, I_T Nexus loss occurred */
|
|
const struct SCSISense sense_code_I_T_NEXUS_LOSS = {
|
|
.key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07
|
|
};
|
|
|
|
/* Command aborted, Logical Unit failure */
|
|
const struct SCSISense sense_code_LUN_FAILURE = {
|
|
.key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01
|
|
};
|
|
|
|
/* Unit attention, Power on, reset or bus device reset occurred */
|
|
const struct SCSISense sense_code_RESET = {
|
|
.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00
|
|
};
|
|
|
|
/* Unit attention, No medium */
|
|
const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = {
|
|
.key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00
|
|
};
|
|
|
|
/* Unit attention, Medium may have changed */
|
|
const struct SCSISense sense_code_MEDIUM_CHANGED = {
|
|
.key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00
|
|
};
|
|
|
|
/* Unit attention, Reported LUNs data has changed */
|
|
const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = {
|
|
.key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e
|
|
};
|
|
|
|
/* Unit attention, Device internal reset */
|
|
const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = {
|
|
.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04
|
|
};
|
|
|
|
/*
|
|
* scsi_build_sense
|
|
*
|
|
* Convert between fixed and descriptor sense buffers
|
|
*/
|
|
int scsi_build_sense(uint8_t *in_buf, int in_len,
|
|
uint8_t *buf, int len, bool fixed)
|
|
{
|
|
bool fixed_in;
|
|
SCSISense sense;
|
|
if (!fixed && len < 8) {
|
|
return 0;
|
|
}
|
|
|
|
if (in_len == 0) {
|
|
sense.key = NO_SENSE;
|
|
sense.asc = 0;
|
|
sense.ascq = 0;
|
|
} else {
|
|
fixed_in = (in_buf[0] & 2) == 0;
|
|
|
|
if (fixed == fixed_in) {
|
|
memcpy(buf, in_buf, MIN(len, in_len));
|
|
return MIN(len, in_len);
|
|
}
|
|
|
|
if (fixed_in) {
|
|
sense.key = in_buf[2];
|
|
sense.asc = in_buf[12];
|
|
sense.ascq = in_buf[13];
|
|
} else {
|
|
sense.key = in_buf[1];
|
|
sense.asc = in_buf[2];
|
|
sense.ascq = in_buf[3];
|
|
}
|
|
}
|
|
|
|
memset(buf, 0, len);
|
|
if (fixed) {
|
|
/* Return fixed format sense buffer */
|
|
buf[0] = 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",
|
|
[ READ_6 ] = "READ_6",
|
|
[ WRITE_6 ] = "WRITE_6",
|
|
[ SET_CAPACITY ] = "SET_CAPACITY",
|
|
[ READ_REVERSE ] = "READ_REVERSE",
|
|
[ WRITE_FILEMARKS ] = "WRITE_FILEMARKS",
|
|
[ SPACE ] = "SPACE",
|
|
[ INQUIRY ] = "INQUIRY",
|
|
[ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA",
|
|
[ MAINTENANCE_IN ] = "MAINTENANCE_IN",
|
|
[ MAINTENANCE_OUT ] = "MAINTENANCE_OUT",
|
|
[ MODE_SELECT ] = "MODE_SELECT",
|
|
[ RESERVE ] = "RESERVE",
|
|
[ RELEASE ] = "RELEASE",
|
|
[ COPY ] = "COPY",
|
|
[ ERASE ] = "ERASE",
|
|
[ MODE_SENSE ] = "MODE_SENSE",
|
|
[ START_STOP ] = "START_STOP",
|
|
[ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC",
|
|
[ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC",
|
|
[ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL",
|
|
[ READ_CAPACITY_10 ] = "READ_CAPACITY_10",
|
|
[ READ_10 ] = "READ_10",
|
|
[ WRITE_10 ] = "WRITE_10",
|
|
[ SEEK_10 ] = "SEEK_10",
|
|
[ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10",
|
|
[ VERIFY_10 ] = "VERIFY_10",
|
|
[ SEARCH_HIGH ] = "SEARCH_HIGH",
|
|
[ SEARCH_EQUAL ] = "SEARCH_EQUAL",
|
|
[ SEARCH_LOW ] = "SEARCH_LOW",
|
|
[ SET_LIMITS ] = "SET_LIMITS",
|
|
[ PRE_FETCH ] = "PRE_FETCH/READ_POSITION",
|
|
/* READ_POSITION and PRE_FETCH use the same operation code */
|
|
[ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE",
|
|
[ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE",
|
|
[ READ_DEFECT_DATA ] = "READ_DEFECT_DATA",
|
|
[ MEDIUM_SCAN ] = "MEDIUM_SCAN",
|
|
[ COMPARE ] = "COMPARE",
|
|
[ COPY_VERIFY ] = "COPY_VERIFY",
|
|
[ WRITE_BUFFER ] = "WRITE_BUFFER",
|
|
[ READ_BUFFER ] = "READ_BUFFER",
|
|
[ UPDATE_BLOCK ] = "UPDATE_BLOCK",
|
|
[ READ_LONG_10 ] = "READ_LONG_10",
|
|
[ WRITE_LONG_10 ] = "WRITE_LONG_10",
|
|
[ CHANGE_DEFINITION ] = "CHANGE_DEFINITION",
|
|
[ WRITE_SAME_10 ] = "WRITE_SAME_10",
|
|
[ UNMAP ] = "UNMAP",
|
|
[ READ_TOC ] = "READ_TOC",
|
|
[ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT",
|
|
[ SANITIZE ] = "SANITIZE",
|
|
[ GET_CONFIGURATION ] = "GET_CONFIGURATION",
|
|
[ LOG_SELECT ] = "LOG_SELECT",
|
|
[ LOG_SENSE ] = "LOG_SENSE",
|
|
[ MODE_SELECT_10 ] = "MODE_SELECT_10",
|
|
[ RESERVE_10 ] = "RESERVE_10",
|
|
[ RELEASE_10 ] = "RELEASE_10",
|
|
[ MODE_SENSE_10 ] = "MODE_SENSE_10",
|
|
[ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN",
|
|
[ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT",
|
|
[ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16",
|
|
[ EXTENDED_COPY ] = "EXTENDED_COPY",
|
|
[ ATA_PASSTHROUGH ] = "ATA_PASSTHROUGH",
|
|
[ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN",
|
|
[ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT",
|
|
[ READ_16 ] = "READ_16",
|
|
[ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE",
|
|
[ WRITE_16 ] = "WRITE_16",
|
|
[ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16",
|
|
[ VERIFY_16 ] = "VERIFY_16",
|
|
[ PRE_FETCH_16 ] = "PRE_FETCH_16",
|
|
[ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16",
|
|
/* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */
|
|
[ LOCATE_16 ] = "LOCATE_16",
|
|
[ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16",
|
|
/* ERASE_16 and WRITE_SAME_16 use the same operation code */
|
|
[ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16",
|
|
[ WRITE_LONG_16 ] = "WRITE_LONG_16",
|
|
[ REPORT_LUNS ] = "REPORT_LUNS",
|
|
[ BLANK ] = "BLANK",
|
|
[ MOVE_MEDIUM ] = "MOVE_MEDIUM",
|
|
[ LOAD_UNLOAD ] = "LOAD_UNLOAD",
|
|
[ READ_12 ] = "READ_12",
|
|
[ WRITE_12 ] = "WRITE_12",
|
|
[ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE",
|
|
/* ERASE_12 and GET_PERFORMANCE use the same operation code */
|
|
[ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12",
|
|
[ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12",
|
|
[ VERIFY_12 ] = "VERIFY_12",
|
|
[ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12",
|
|
[ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12",
|
|
[ SEARCH_LOW_12 ] = "SEARCH_LOW_12",
|
|
[ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS",
|
|
[ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING",
|
|
/* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */
|
|
[ READ_CD ] = "READ_CD",
|
|
[ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12",
|
|
[ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE",
|
|
[ RESERVE_TRACK ] = "RESERVE_TRACK",
|
|
[ SEND_CUE_SHEET ] = "SEND_CUE_SHEET",
|
|
[ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE",
|
|
[ SET_CD_SPEED ] = "SET_CD_SPEED",
|
|
[ SET_READ_AHEAD ] = "SET_READ_AHEAD",
|
|
[ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE",
|
|
[ MECHANISM_STATUS ] = "MECHANISM_STATUS",
|
|
};
|
|
|
|
if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL)
|
|
return "*UNKNOWN*";
|
|
return names[cmd];
|
|
}
|
|
|
|
SCSIRequest *scsi_req_ref(SCSIRequest *req)
|
|
{
|
|
req->refcount++;
|
|
return req;
|
|
}
|
|
|
|
void scsi_req_unref(SCSIRequest *req)
|
|
{
|
|
assert(req->refcount > 0);
|
|
if (--req->refcount == 0) {
|
|
if (req->ops->free_req) {
|
|
req->ops->free_req(req);
|
|
}
|
|
g_free(req);
|
|
}
|
|
}
|
|
|
|
/* Tell the device that we finished processing this chunk of I/O. It
|
|
will start the next chunk or complete the command. */
|
|
void scsi_req_continue(SCSIRequest *req)
|
|
{
|
|
trace_scsi_req_continue(req->dev->id, req->lun, req->tag);
|
|
if (req->cmd.mode == SCSI_XFER_TO_DEV) {
|
|
req->ops->write_data(req);
|
|
} else {
|
|
req->ops->read_data(req);
|
|
}
|
|
}
|
|
|
|
/* Called by the devices when data is ready for the HBA. The HBA should
|
|
start a DMA operation to read or fill the device's data buffer.
|
|
Once it completes, calling scsi_req_continue will restart I/O. */
|
|
void scsi_req_data(SCSIRequest *req, int len)
|
|
{
|
|
uint8_t *buf;
|
|
if (req->io_canceled) {
|
|
trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len);
|
|
return;
|
|
}
|
|
trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
|
|
assert(req->cmd.mode != SCSI_XFER_NONE);
|
|
if (!req->sg) {
|
|
req->resid -= len;
|
|
req->bus->info->transfer_data(req, len);
|
|
return;
|
|
}
|
|
|
|
/* If the device calls scsi_req_data and the HBA specified a
|
|
* scatter/gather list, the transfer has to happen in a single
|
|
* step. */
|
|
assert(!req->dma_started);
|
|
req->dma_started = true;
|
|
|
|
buf = scsi_req_get_buf(req);
|
|
if (req->cmd.mode == SCSI_XFER_FROM_DEV) {
|
|
req->resid = dma_buf_read(buf, len, req->sg);
|
|
} else {
|
|
req->resid = dma_buf_write(buf, len, req->sg);
|
|
}
|
|
scsi_req_continue(req);
|
|
}
|
|
|
|
void scsi_req_print(SCSIRequest *req)
|
|
{
|
|
FILE *fp = stderr;
|
|
int i;
|
|
|
|
fprintf(fp, "[%s id=%d] %s",
|
|
req->dev->qdev.parent_bus->name,
|
|
req->dev->id,
|
|
scsi_command_name(req->cmd.buf[0]));
|
|
for (i = 1; i < req->cmd.len; i++) {
|
|
fprintf(fp, " 0x%02x", req->cmd.buf[i]);
|
|
}
|
|
switch (req->cmd.mode) {
|
|
case SCSI_XFER_NONE:
|
|
fprintf(fp, " - none\n");
|
|
break;
|
|
case SCSI_XFER_FROM_DEV:
|
|
fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer);
|
|
break;
|
|
case SCSI_XFER_TO_DEV:
|
|
fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer);
|
|
break;
|
|
default:
|
|
fprintf(fp, " - Oops\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
void scsi_req_complete(SCSIRequest *req, int status)
|
|
{
|
|
assert(req->status == -1);
|
|
req->status = status;
|
|
|
|
assert(req->sense_len < sizeof(req->sense));
|
|
if (status == GOOD) {
|
|
req->sense_len = 0;
|
|
}
|
|
|
|
if (req->sense_len) {
|
|
memcpy(req->dev->sense, req->sense, req->sense_len);
|
|
req->dev->sense_len = req->sense_len;
|
|
req->dev->sense_is_ua = (req->ops == &reqops_unit_attention);
|
|
} else {
|
|
req->dev->sense_len = 0;
|
|
req->dev->sense_is_ua = false;
|
|
}
|
|
|
|
/*
|
|
* Unit attention state is now stored in the device's sense buffer
|
|
* if the HBA didn't do autosense. Clear the pending unit attention
|
|
* flags.
|
|
*/
|
|
scsi_clear_unit_attention(req);
|
|
|
|
scsi_req_ref(req);
|
|
scsi_req_dequeue(req);
|
|
req->bus->info->complete(req, req->status, req->resid);
|
|
scsi_req_unref(req);
|
|
}
|
|
|
|
void scsi_req_cancel(SCSIRequest *req)
|
|
{
|
|
if (!req->enqueued) {
|
|
return;
|
|
}
|
|
scsi_req_ref(req);
|
|
scsi_req_dequeue(req);
|
|
req->io_canceled = true;
|
|
if (req->ops->cancel_io) {
|
|
req->ops->cancel_io(req);
|
|
}
|
|
if (req->bus->info->cancel) {
|
|
req->bus->info->cancel(req);
|
|
}
|
|
scsi_req_unref(req);
|
|
}
|
|
|
|
void scsi_req_abort(SCSIRequest *req, int status)
|
|
{
|
|
if (!req->enqueued) {
|
|
return;
|
|
}
|
|
scsi_req_ref(req);
|
|
scsi_req_dequeue(req);
|
|
req->io_canceled = true;
|
|
if (req->ops->cancel_io) {
|
|
req->ops->cancel_io(req);
|
|
}
|
|
scsi_req_complete(req, status);
|
|
scsi_req_unref(req);
|
|
}
|
|
|
|
void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense)
|
|
{
|
|
SCSIRequest *req;
|
|
|
|
while (!QTAILQ_EMPTY(&sdev->requests)) {
|
|
req = QTAILQ_FIRST(&sdev->requests);
|
|
scsi_req_cancel(req);
|
|
}
|
|
sdev->unit_attention = sense;
|
|
}
|
|
|
|
static char *scsibus_get_dev_path(DeviceState *dev)
|
|
{
|
|
SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev);
|
|
DeviceState *hba = dev->parent_bus->parent;
|
|
char *id;
|
|
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);
|
|
char path[100];
|
|
|
|
snprintf(path, sizeof(path), "channel@%x/%s@%x,%x", d->channel,
|
|
qdev_fw_name(dev), d->id, d->lun);
|
|
|
|
return strdup(path);
|
|
}
|
|
|
|
SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun)
|
|
{
|
|
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 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 = qdev_simple_unplug_cb;
|
|
k->exit = scsi_qdev_exit;
|
|
k->props = scsi_props;
|
|
}
|
|
|
|
static TypeInfo scsi_device_type_info = {
|
|
.name = TYPE_SCSI_DEVICE,
|
|
.parent = TYPE_DEVICE,
|
|
.instance_size = sizeof(SCSIDevice),
|
|
.abstract = true,
|
|
.class_size = sizeof(SCSIDeviceClass),
|
|
.class_init = scsi_device_class_init,
|
|
};
|
|
|
|
static void scsi_register_types(void)
|
|
{
|
|
type_register_static(&scsi_bus_info);
|
|
type_register_static(&scsi_device_type_info);
|
|
}
|
|
|
|
type_init(scsi_register_types)
|