545557d4ab
Both REWIND and REZERO_UNIT use 0x01, READ_POSITION and PRE_FETCH share 0x34. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
499 lines
14 KiB
C
499 lines
14 KiB
C
#include "hw.h"
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#include "sysemu.h"
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#include "scsi.h"
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#include "scsi-defs.h"
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#include "block.h"
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#include "qdev.h"
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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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/* 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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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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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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qemu_error("bad scsi device id: %d\n", dev->id);
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goto err;
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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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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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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 = DO_UPCAST(SCSIDevice, qdev, qdev);
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
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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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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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/* handle legacy '-drive if=scsi,...' cmd line args */
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/* FIXME callers should check for failure, but don't */
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SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, DriveInfo *dinfo, int unit)
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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(dinfo->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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qdev_prop_set_drive(dev, "drive", dinfo);
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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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void scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
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{
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DriveInfo *dinfo;
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int unit;
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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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scsi_bus_legacy_add_drive(bus, dinfo, unit);
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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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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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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;
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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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SCSIRequest *scsi_req_find(SCSIDevice *d, uint32_t tag)
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{
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SCSIRequest *req;
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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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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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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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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);
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break;
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}
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return 0;
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}
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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]) {
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/* 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);
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if (cmd[1] & 0x01) /* fixed */
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req->cmd.xfer *= req->dev->blocksize;
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break;
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case REWIND:
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case START_STOP:
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req->cmd.len = 6;
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req->cmd.xfer = 0;
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break;
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/* generic commands */
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default:
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return scsi_req_length(req, cmd);
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}
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return 0;
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}
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static void scsi_req_xfer_mode(SCSIRequest *req)
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{
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switch (req->cmd.buf[0]) {
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case WRITE_6:
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case WRITE_10:
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case WRITE_VERIFY:
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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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case COPY:
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case COPY_VERIFY:
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case COMPARE:
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case CHANGE_DEFINITION:
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case LOG_SELECT:
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case MODE_SELECT:
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case MODE_SELECT_10:
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case SEND_DIAGNOSTIC:
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case WRITE_BUFFER:
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case FORMAT_UNIT:
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case REASSIGN_BLOCKS:
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case RESERVE:
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case SEARCH_EQUAL:
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case SEARCH_HIGH:
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case SEARCH_LOW:
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case UPDATE_BLOCK:
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case WRITE_LONG:
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case WRITE_SAME:
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case SEARCH_HIGH_12:
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case SEARCH_EQUAL_12:
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case SEARCH_LOW_12:
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case SET_WINDOW:
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case MEDIUM_SCAN:
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case SEND_VOLUME_TAG:
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case WRITE_LONG_2:
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req->cmd.mode = SCSI_XFER_TO_DEV;
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break;
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default:
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if (req->cmd.xfer)
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req->cmd.mode = SCSI_XFER_FROM_DEV;
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else {
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req->cmd.mode = SCSI_XFER_NONE;
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}
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break;
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}
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}
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static uint64_t scsi_req_lba(SCSIRequest *req)
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{
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uint8_t *buf = req->cmd.buf;
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uint64_t lba;
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switch (buf[0] >> 5) {
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case 0:
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lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) |
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(((uint64_t) buf[1] & 0x1f) << 16);
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break;
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case 1:
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case 2:
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lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) |
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((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24);
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break;
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case 4:
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lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) |
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((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) |
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((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) |
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((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56);
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break;
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case 5:
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lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) |
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((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24);
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break;
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default:
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lba = -1;
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}
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return lba;
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}
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int scsi_req_parse(SCSIRequest *req, uint8_t *buf)
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{
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int rc;
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if (req->dev->type == TYPE_TAPE) {
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rc = scsi_req_stream_length(req, buf);
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} else {
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rc = scsi_req_length(req, buf);
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}
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if (rc != 0)
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return rc;
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memcpy(req->cmd.buf, buf, req->cmd.len);
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scsi_req_xfer_mode(req);
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req->cmd.lba = scsi_req_lba(req);
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return 0;
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}
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static const char *scsi_command_name(uint8_t cmd)
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{
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static const char *names[] = {
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[ TEST_UNIT_READY ] = "TEST_UNIT_READY",
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[ REZERO_UNIT ] = "REZERO_UNIT",
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/* REWIND and REZERO_UNIT use the same operation code */
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[ REQUEST_SENSE ] = "REQUEST_SENSE",
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[ FORMAT_UNIT ] = "FORMAT_UNIT",
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[ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS",
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[ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS",
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[ READ_6 ] = "READ_6",
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[ WRITE_6 ] = "WRITE_6",
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[ SEEK_6 ] = "SEEK_6",
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[ READ_REVERSE ] = "READ_REVERSE",
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[ WRITE_FILEMARKS ] = "WRITE_FILEMARKS",
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[ SPACE ] = "SPACE",
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[ INQUIRY ] = "INQUIRY",
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[ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA",
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[ MODE_SELECT ] = "MODE_SELECT",
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[ RESERVE ] = "RESERVE",
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[ RELEASE ] = "RELEASE",
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[ COPY ] = "COPY",
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[ ERASE ] = "ERASE",
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[ MODE_SENSE ] = "MODE_SENSE",
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[ START_STOP ] = "START_STOP",
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[ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC",
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[ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC",
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[ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL",
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[ SET_WINDOW ] = "SET_WINDOW",
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[ READ_CAPACITY ] = "READ_CAPACITY",
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[ READ_10 ] = "READ_10",
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[ WRITE_10 ] = "WRITE_10",
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[ SEEK_10 ] = "SEEK_10",
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[ WRITE_VERIFY ] = "WRITE_VERIFY",
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[ VERIFY ] = "VERIFY",
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[ SEARCH_HIGH ] = "SEARCH_HIGH",
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[ SEARCH_EQUAL ] = "SEARCH_EQUAL",
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[ SEARCH_LOW ] = "SEARCH_LOW",
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[ SET_LIMITS ] = "SET_LIMITS",
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[ PRE_FETCH ] = "PRE_FETCH",
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/* READ_POSITION and PRE_FETCH use the same operation code */
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[ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE",
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[ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE",
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[ READ_DEFECT_DATA ] = "READ_DEFECT_DATA",
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[ MEDIUM_SCAN ] = "MEDIUM_SCAN",
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[ COMPARE ] = "COMPARE",
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[ COPY_VERIFY ] = "COPY_VERIFY",
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[ WRITE_BUFFER ] = "WRITE_BUFFER",
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[ READ_BUFFER ] = "READ_BUFFER",
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[ UPDATE_BLOCK ] = "UPDATE_BLOCK",
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[ READ_LONG ] = "READ_LONG",
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[ WRITE_LONG ] = "WRITE_LONG",
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[ CHANGE_DEFINITION ] = "CHANGE_DEFINITION",
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[ WRITE_SAME ] = "WRITE_SAME",
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[ READ_TOC ] = "READ_TOC",
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[ LOG_SELECT ] = "LOG_SELECT",
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[ LOG_SENSE ] = "LOG_SENSE",
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[ MODE_SELECT_10 ] = "MODE_SELECT_10",
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[ RESERVE_10 ] = "RESERVE_10",
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[ RELEASE_10 ] = "RELEASE_10",
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[ MODE_SENSE_10 ] = "MODE_SENSE_10",
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[ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN",
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[ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT",
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[ MOVE_MEDIUM ] = "MOVE_MEDIUM",
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[ READ_12 ] = "READ_12",
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[ WRITE_12 ] = "WRITE_12",
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[ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12",
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[ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12",
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[ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12",
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[ SEARCH_LOW_12 ] = "SEARCH_LOW_12",
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[ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS",
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[ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG",
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[ WRITE_LONG_2 ] = "WRITE_LONG_2",
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[ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT",
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[ GET_CONFIGURATION ] = "GET_CONFIGURATION",
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[ READ_16 ] = "READ_16",
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[ WRITE_16 ] = "WRITE_16",
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[ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16",
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[ SERVICE_ACTION_IN ] = "SERVICE_ACTION_IN",
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[ REPORT_LUNS ] = "REPORT_LUNS",
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[ LOAD_UNLOAD ] = "LOAD_UNLOAD",
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[ SET_CD_SPEED ] = "SET_CD_SPEED",
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[ BLANK ] = "BLANK",
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};
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if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL)
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return "*UNKNOWN*";
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return names[cmd];
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}
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void scsi_req_print(SCSIRequest *req)
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{
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FILE *fp = stderr;
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int i;
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fprintf(fp, "[%s id=%d] %s",
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req->dev->qdev.parent_bus->name,
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req->dev->id,
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scsi_command_name(req->cmd.buf[0]));
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for (i = 1; i < req->cmd.len; i++) {
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fprintf(fp, " 0x%02x", req->cmd.buf[i]);
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}
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switch (req->cmd.mode) {
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case SCSI_XFER_NONE:
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fprintf(fp, " - none\n");
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break;
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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)
|
|
{
|
|
assert(req->status != -1);
|
|
req->bus->complete(req->bus, SCSI_REASON_DONE,
|
|
req->tag,
|
|
req->status);
|
|
}
|