root / hw / scsi-bus.c @ 18846dee
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| 1 |
#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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|
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static struct BusInfo scsi_bus_info = { |
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.name = "SCSI",
|
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.size = sizeof(SCSIBus),
|
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.props = (Property[]) {
|
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DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1), |
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DEFINE_PROP_END_OF_LIST(), |
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}, |
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}; |
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static int next_scsi_bus; |
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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, int tcq, int ndev, |
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scsi_completionfn complete) |
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{
|
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qbus_create_inplace(&bus->qbus, &scsi_bus_info, host, NULL);
|
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bus->busnr = next_scsi_bus++; |
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bus->tcq = tcq; |
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bus->ndev = ndev; |
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bus->complete = complete; |
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bus->qbus.allow_hotplug = 1;
|
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} |
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|
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static int scsi_qdev_init(DeviceState *qdev, DeviceInfo *base) |
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{
|
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SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev); |
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SCSIDeviceInfo *info = DO_UPCAST(SCSIDeviceInfo, qdev, base); |
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); |
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int rc = -1; |
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|
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if (dev->id == -1) { |
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for (dev->id = 0; dev->id < bus->ndev; dev->id++) { |
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if (bus->devs[dev->id] == NULL) |
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break;
|
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} |
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} |
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if (dev->id >= bus->ndev) {
|
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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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|
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if (bus->devs[dev->id]) {
|
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qdev_free(&bus->devs[dev->id]->qdev); |
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} |
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bus->devs[dev->id] = dev; |
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|
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dev->info = info; |
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QTAILQ_INIT(&dev->requests); |
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rc = dev->info->init(dev); |
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if (rc != 0) { |
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bus->devs[dev->id] = NULL;
|
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} |
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|
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err:
|
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return rc;
|
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} |
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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 = DO_UPCAST(SCSIDevice, qdev, qdev); |
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); |
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|
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assert(bus->devs[dev->id] != NULL);
|
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if (bus->devs[dev->id]->info->destroy) {
|
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bus->devs[dev->id]->info->destroy(bus->devs[dev->id]); |
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} |
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bus->devs[dev->id] = NULL;
|
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return 0; |
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} |
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|
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void scsi_qdev_register(SCSIDeviceInfo *info)
|
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{
|
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info->qdev.bus_info = &scsi_bus_info; |
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info->qdev.init = scsi_qdev_init; |
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info->qdev.unplug = qdev_simple_unplug_cb; |
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info->qdev.exit = scsi_qdev_exit; |
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qdev_register(&info->qdev); |
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} |
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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, int unit)
|
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{
|
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const char *driver; |
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DeviceState *dev; |
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|
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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 (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 DO_UPCAST(SCSIDevice, qdev, dev);
|
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} |
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|
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int scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
|
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{
|
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DriveInfo *dinfo; |
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int res = 0, unit; |
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|
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for (unit = 0; unit < MAX_SCSI_DEVS; 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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if (!scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit)) {
|
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res = -1;
|
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break;
|
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} |
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} |
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return res;
|
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} |
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|
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void scsi_dev_clear_sense(SCSIDevice *dev)
|
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{
|
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memset(&dev->sense, 0, sizeof(dev->sense)); |
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} |
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|
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void scsi_dev_set_sense(SCSIDevice *dev, uint8_t key)
|
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{
|
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dev->sense.key = key; |
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} |
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|
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SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun) |
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{
|
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SCSIRequest *req; |
| 134 |
|
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req = qemu_mallocz(size); |
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req->bus = scsi_bus_from_device(d); |
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req->dev = d; |
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req->tag = tag; |
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req->lun = lun; |
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req->status = -1;
|
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QTAILQ_INSERT_TAIL(&d->requests, req, next); |
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return req;
|
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} |
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|
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SCSIRequest *scsi_req_find(SCSIDevice *d, uint32_t tag) |
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{
|
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SCSIRequest *req; |
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|
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QTAILQ_FOREACH(req, &d->requests, next) {
|
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if (req->tag == tag) {
|
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return req;
|
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} |
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} |
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return NULL; |
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} |
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|
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void scsi_req_free(SCSIRequest *req)
|
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{
|
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QTAILQ_REMOVE(&req->dev->requests, req, next); |
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qemu_free(req); |
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} |
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|
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static int scsi_req_length(SCSIRequest *req, uint8_t *cmd) |
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{
|
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switch (cmd[0] >> 5) { |
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case 0: |
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req->cmd.xfer = cmd[4];
|
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req->cmd.len = 6;
|
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/* length 0 means 256 blocks */
|
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if (req->cmd.xfer == 0) |
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req->cmd.xfer = 256;
|
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break;
|
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case 1: |
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case 2: |
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req->cmd.xfer = cmd[8] | (cmd[7] << 8); |
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req->cmd.len = 10;
|
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break;
|
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case 4: |
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req->cmd.xfer = cmd[13] | (cmd[12] << 8) | (cmd[11] << 16) | (cmd[10] << 24); |
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req->cmd.len = 16;
|
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break;
|
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case 5: |
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req->cmd.xfer = cmd[9] | (cmd[8] << 8) | (cmd[7] << 16) | (cmd[6] << 24); |
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req->cmd.len = 12;
|
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break;
|
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default:
|
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return -1; |
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} |
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|
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switch(cmd[0]) { |
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case TEST_UNIT_READY:
|
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case REZERO_UNIT:
|
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case START_STOP:
|
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case SEEK_6:
|
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case WRITE_FILEMARKS:
|
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case SPACE:
|
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case ERASE:
|
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case ALLOW_MEDIUM_REMOVAL:
|
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case VERIFY:
|
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case SEEK_10:
|
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case SYNCHRONIZE_CACHE:
|
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case LOCK_UNLOCK_CACHE:
|
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case LOAD_UNLOAD:
|
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case SET_CD_SPEED:
|
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case SET_LIMITS:
|
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case WRITE_LONG:
|
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case MOVE_MEDIUM:
|
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case UPDATE_BLOCK:
|
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req->cmd.xfer = 0;
|
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break;
|
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case MODE_SENSE:
|
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break;
|
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case WRITE_SAME:
|
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req->cmd.xfer = 1;
|
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break;
|
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case READ_CAPACITY:
|
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req->cmd.xfer = 8;
|
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break;
|
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case READ_BLOCK_LIMITS:
|
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req->cmd.xfer = 6;
|
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break;
|
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case READ_POSITION:
|
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req->cmd.xfer = 20;
|
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break;
|
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case SEND_VOLUME_TAG:
|
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req->cmd.xfer *= 40;
|
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break;
|
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case MEDIUM_SCAN:
|
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req->cmd.xfer *= 8;
|
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break;
|
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case WRITE_10:
|
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case WRITE_VERIFY:
|
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case WRITE_6:
|
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case WRITE_12:
|
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case WRITE_VERIFY_12:
|
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case WRITE_16:
|
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case WRITE_VERIFY_16:
|
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req->cmd.xfer *= req->dev->blocksize; |
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break;
|
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case READ_10:
|
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case READ_6:
|
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case READ_REVERSE:
|
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case RECOVER_BUFFERED_DATA:
|
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case READ_12:
|
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case READ_16:
|
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req->cmd.xfer *= req->dev->blocksize; |
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break;
|
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case INQUIRY:
|
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req->cmd.xfer = cmd[4] | (cmd[3] << 8); |
| 250 |
break;
|
| 251 |
case MAINTENANCE_OUT:
|
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case MAINTENANCE_IN:
|
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if (req->dev->type == TYPE_ROM) {
|
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/* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */
|
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req->cmd.xfer = cmd[9] | (cmd[8] << 8); |
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} |
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break;
|
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} |
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return 0; |
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} |
| 261 |
|
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static int scsi_req_stream_length(SCSIRequest *req, uint8_t *cmd) |
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{
|
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switch(cmd[0]) { |
| 265 |
/* stream commands */
|
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case READ_6:
|
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case READ_REVERSE:
|
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case RECOVER_BUFFERED_DATA:
|
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case WRITE_6:
|
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req->cmd.len = 6;
|
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req->cmd.xfer = cmd[4] | (cmd[3] << 8) | (cmd[2] << 16); |
| 272 |
if (cmd[1] & 0x01) /* fixed */ |
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req->cmd.xfer *= req->dev->blocksize; |
| 274 |
break;
|
| 275 |
case REWIND:
|
| 276 |
case START_STOP:
|
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req->cmd.len = 6;
|
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req->cmd.xfer = 0;
|
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break;
|
| 280 |
/* generic commands */
|
| 281 |
default:
|
| 282 |
return scsi_req_length(req, cmd);
|
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} |
| 284 |
return 0; |
| 285 |
} |
| 286 |
|
| 287 |
static void scsi_req_xfer_mode(SCSIRequest *req) |
| 288 |
{
|
| 289 |
switch (req->cmd.buf[0]) { |
| 290 |
case WRITE_6:
|
| 291 |
case WRITE_10:
|
| 292 |
case WRITE_VERIFY:
|
| 293 |
case WRITE_12:
|
| 294 |
case WRITE_VERIFY_12:
|
| 295 |
case WRITE_16:
|
| 296 |
case WRITE_VERIFY_16:
|
| 297 |
case COPY:
|
| 298 |
case COPY_VERIFY:
|
| 299 |
case COMPARE:
|
| 300 |
case CHANGE_DEFINITION:
|
| 301 |
case LOG_SELECT:
|
| 302 |
case MODE_SELECT:
|
| 303 |
case MODE_SELECT_10:
|
| 304 |
case SEND_DIAGNOSTIC:
|
| 305 |
case WRITE_BUFFER:
|
| 306 |
case FORMAT_UNIT:
|
| 307 |
case REASSIGN_BLOCKS:
|
| 308 |
case RESERVE:
|
| 309 |
case SEARCH_EQUAL:
|
| 310 |
case SEARCH_HIGH:
|
| 311 |
case SEARCH_LOW:
|
| 312 |
case UPDATE_BLOCK:
|
| 313 |
case WRITE_LONG:
|
| 314 |
case WRITE_SAME:
|
| 315 |
case SEARCH_HIGH_12:
|
| 316 |
case SEARCH_EQUAL_12:
|
| 317 |
case SEARCH_LOW_12:
|
| 318 |
case SET_WINDOW:
|
| 319 |
case MEDIUM_SCAN:
|
| 320 |
case SEND_VOLUME_TAG:
|
| 321 |
case WRITE_LONG_2:
|
| 322 |
case PERSISTENT_RESERVE_OUT:
|
| 323 |
case MAINTENANCE_OUT:
|
| 324 |
req->cmd.mode = SCSI_XFER_TO_DEV; |
| 325 |
break;
|
| 326 |
default:
|
| 327 |
if (req->cmd.xfer)
|
| 328 |
req->cmd.mode = SCSI_XFER_FROM_DEV; |
| 329 |
else {
|
| 330 |
req->cmd.mode = SCSI_XFER_NONE; |
| 331 |
} |
| 332 |
break;
|
| 333 |
} |
| 334 |
} |
| 335 |
|
| 336 |
static uint64_t scsi_req_lba(SCSIRequest *req)
|
| 337 |
{
|
| 338 |
uint8_t *buf = req->cmd.buf; |
| 339 |
uint64_t lba; |
| 340 |
|
| 341 |
switch (buf[0] >> 5) { |
| 342 |
case 0: |
| 343 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
| 344 |
(((uint64_t) buf[1] & 0x1f) << 16); |
| 345 |
break;
|
| 346 |
case 1: |
| 347 |
case 2: |
| 348 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
| 349 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
| 350 |
break;
|
| 351 |
case 4: |
| 352 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
| 353 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
| 354 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
| 355 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
| 356 |
break;
|
| 357 |
case 5: |
| 358 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
| 359 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
| 360 |
break;
|
| 361 |
default:
|
| 362 |
lba = -1;
|
| 363 |
|
| 364 |
} |
| 365 |
return lba;
|
| 366 |
} |
| 367 |
|
| 368 |
int scsi_req_parse(SCSIRequest *req, uint8_t *buf)
|
| 369 |
{
|
| 370 |
int rc;
|
| 371 |
|
| 372 |
if (req->dev->type == TYPE_TAPE) {
|
| 373 |
rc = scsi_req_stream_length(req, buf); |
| 374 |
} else {
|
| 375 |
rc = scsi_req_length(req, buf); |
| 376 |
} |
| 377 |
if (rc != 0) |
| 378 |
return rc;
|
| 379 |
|
| 380 |
memcpy(req->cmd.buf, buf, req->cmd.len); |
| 381 |
scsi_req_xfer_mode(req); |
| 382 |
req->cmd.lba = scsi_req_lba(req); |
| 383 |
return 0; |
| 384 |
} |
| 385 |
|
| 386 |
static const char *scsi_command_name(uint8_t cmd) |
| 387 |
{
|
| 388 |
static const char *names[] = { |
| 389 |
[ TEST_UNIT_READY ] = "TEST_UNIT_READY",
|
| 390 |
[ REZERO_UNIT ] = "REZERO_UNIT",
|
| 391 |
/* REWIND and REZERO_UNIT use the same operation code */
|
| 392 |
[ REQUEST_SENSE ] = "REQUEST_SENSE",
|
| 393 |
[ FORMAT_UNIT ] = "FORMAT_UNIT",
|
| 394 |
[ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS",
|
| 395 |
[ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS",
|
| 396 |
[ READ_6 ] = "READ_6",
|
| 397 |
[ WRITE_6 ] = "WRITE_6",
|
| 398 |
[ SEEK_6 ] = "SEEK_6",
|
| 399 |
[ READ_REVERSE ] = "READ_REVERSE",
|
| 400 |
[ WRITE_FILEMARKS ] = "WRITE_FILEMARKS",
|
| 401 |
[ SPACE ] = "SPACE",
|
| 402 |
[ INQUIRY ] = "INQUIRY",
|
| 403 |
[ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA",
|
| 404 |
[ MAINTENANCE_IN ] = "MAINTENANCE_IN",
|
| 405 |
[ MAINTENANCE_OUT ] = "MAINTENANCE_OUT",
|
| 406 |
[ MODE_SELECT ] = "MODE_SELECT",
|
| 407 |
[ RESERVE ] = "RESERVE",
|
| 408 |
[ RELEASE ] = "RELEASE",
|
| 409 |
[ COPY ] = "COPY",
|
| 410 |
[ ERASE ] = "ERASE",
|
| 411 |
[ MODE_SENSE ] = "MODE_SENSE",
|
| 412 |
[ START_STOP ] = "START_STOP",
|
| 413 |
[ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC",
|
| 414 |
[ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC",
|
| 415 |
[ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL",
|
| 416 |
|
| 417 |
[ SET_WINDOW ] = "SET_WINDOW",
|
| 418 |
[ READ_CAPACITY ] = "READ_CAPACITY",
|
| 419 |
[ READ_10 ] = "READ_10",
|
| 420 |
[ WRITE_10 ] = "WRITE_10",
|
| 421 |
[ SEEK_10 ] = "SEEK_10",
|
| 422 |
[ WRITE_VERIFY ] = "WRITE_VERIFY",
|
| 423 |
[ VERIFY ] = "VERIFY",
|
| 424 |
[ SEARCH_HIGH ] = "SEARCH_HIGH",
|
| 425 |
[ SEARCH_EQUAL ] = "SEARCH_EQUAL",
|
| 426 |
[ SEARCH_LOW ] = "SEARCH_LOW",
|
| 427 |
[ SET_LIMITS ] = "SET_LIMITS",
|
| 428 |
[ PRE_FETCH ] = "PRE_FETCH",
|
| 429 |
/* READ_POSITION and PRE_FETCH use the same operation code */
|
| 430 |
[ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE",
|
| 431 |
[ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE",
|
| 432 |
[ READ_DEFECT_DATA ] = "READ_DEFECT_DATA",
|
| 433 |
[ MEDIUM_SCAN ] = "MEDIUM_SCAN",
|
| 434 |
[ COMPARE ] = "COMPARE",
|
| 435 |
[ COPY_VERIFY ] = "COPY_VERIFY",
|
| 436 |
[ WRITE_BUFFER ] = "WRITE_BUFFER",
|
| 437 |
[ READ_BUFFER ] = "READ_BUFFER",
|
| 438 |
[ UPDATE_BLOCK ] = "UPDATE_BLOCK",
|
| 439 |
[ READ_LONG ] = "READ_LONG",
|
| 440 |
[ WRITE_LONG ] = "WRITE_LONG",
|
| 441 |
[ CHANGE_DEFINITION ] = "CHANGE_DEFINITION",
|
| 442 |
[ WRITE_SAME ] = "WRITE_SAME",
|
| 443 |
[ READ_TOC ] = "READ_TOC",
|
| 444 |
[ LOG_SELECT ] = "LOG_SELECT",
|
| 445 |
[ LOG_SENSE ] = "LOG_SENSE",
|
| 446 |
[ MODE_SELECT_10 ] = "MODE_SELECT_10",
|
| 447 |
[ RESERVE_10 ] = "RESERVE_10",
|
| 448 |
[ RELEASE_10 ] = "RELEASE_10",
|
| 449 |
[ MODE_SENSE_10 ] = "MODE_SENSE_10",
|
| 450 |
[ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN",
|
| 451 |
[ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT",
|
| 452 |
[ MOVE_MEDIUM ] = "MOVE_MEDIUM",
|
| 453 |
[ READ_12 ] = "READ_12",
|
| 454 |
[ WRITE_12 ] = "WRITE_12",
|
| 455 |
[ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12",
|
| 456 |
[ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12",
|
| 457 |
[ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12",
|
| 458 |
[ SEARCH_LOW_12 ] = "SEARCH_LOW_12",
|
| 459 |
[ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS",
|
| 460 |
[ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG",
|
| 461 |
[ WRITE_LONG_2 ] = "WRITE_LONG_2",
|
| 462 |
|
| 463 |
[ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT",
|
| 464 |
[ GET_CONFIGURATION ] = "GET_CONFIGURATION",
|
| 465 |
[ READ_16 ] = "READ_16",
|
| 466 |
[ WRITE_16 ] = "WRITE_16",
|
| 467 |
[ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16",
|
| 468 |
[ SERVICE_ACTION_IN ] = "SERVICE_ACTION_IN",
|
| 469 |
[ REPORT_LUNS ] = "REPORT_LUNS",
|
| 470 |
[ LOAD_UNLOAD ] = "LOAD_UNLOAD",
|
| 471 |
[ SET_CD_SPEED ] = "SET_CD_SPEED",
|
| 472 |
[ BLANK ] = "BLANK",
|
| 473 |
}; |
| 474 |
|
| 475 |
if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) |
| 476 |
return "*UNKNOWN*"; |
| 477 |
return names[cmd];
|
| 478 |
} |
| 479 |
|
| 480 |
void scsi_req_print(SCSIRequest *req)
|
| 481 |
{
|
| 482 |
FILE *fp = stderr; |
| 483 |
int i;
|
| 484 |
|
| 485 |
fprintf(fp, "[%s id=%d] %s",
|
| 486 |
req->dev->qdev.parent_bus->name, |
| 487 |
req->dev->id, |
| 488 |
scsi_command_name(req->cmd.buf[0]));
|
| 489 |
for (i = 1; i < req->cmd.len; i++) { |
| 490 |
fprintf(fp, " 0x%02x", req->cmd.buf[i]);
|
| 491 |
} |
| 492 |
switch (req->cmd.mode) {
|
| 493 |
case SCSI_XFER_NONE:
|
| 494 |
fprintf(fp, " - none\n");
|
| 495 |
break;
|
| 496 |
case SCSI_XFER_FROM_DEV:
|
| 497 |
fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer);
|
| 498 |
break;
|
| 499 |
case SCSI_XFER_TO_DEV:
|
| 500 |
fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer);
|
| 501 |
break;
|
| 502 |
default:
|
| 503 |
fprintf(fp, " - Oops\n");
|
| 504 |
break;
|
| 505 |
} |
| 506 |
} |
| 507 |
|
| 508 |
void scsi_req_complete(SCSIRequest *req)
|
| 509 |
{
|
| 510 |
assert(req->status != -1);
|
| 511 |
req->bus->complete(req->bus, SCSI_REASON_DONE, |
| 512 |
req->tag, |
| 513 |
req->status); |
| 514 |
} |