hw/scsi-bus.c

   1 #include "hw.h"
   2 #include "sysemu.h"
   3 #include "scsi-disk.h"
   4 #include "block.h"
   5 #include "qdev.h"
   6
   7 static struct BusInfo scsi_bus_info = {
   8     .name  = "SCSI",
   9     .size  = sizeof(SCSIBus),
  10     .props = (Property[]) {
  11         DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1),
  12         DEFINE_PROP_END_OF_LIST(),
  13     },
  14 };
  15 static int next_scsi_bus;
  16
  17 /* Create a scsi bus, and attach devices to it.  */
  18 SCSIBus *scsi_bus_new(DeviceState *host, int tcq, int ndev,
  19                       scsi_completionfn complete)
  20 {
  21     SCSIBus *bus;
  22
  23     bus = FROM_QBUS(SCSIBus, qbus_create(&scsi_bus_info, host, NULL));
  24     bus->busnr = next_scsi_bus++;
  25     bus->tcq = tcq;
  26     bus->ndev = ndev;
  27     bus->complete = complete;
  28     return bus;
  29 }
  30
  31 static int scsi_qdev_init(DeviceState *qdev, DeviceInfo *base)
  32 {
  33     SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev);
  34     SCSIDeviceInfo *info = DO_UPCAST(SCSIDeviceInfo, qdev, base);
  35     SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
  36
  37     if (dev->id == -1) {
  38         for (dev->id = 0; dev->id < bus->ndev; dev->id++) {
  39             if (bus->devs[dev->id] == NULL)
  40                 break;
  41         }
  42     }
  43     if (dev->id >= bus->ndev) {
  44         qemu_error("bad scsi device id: %d\n", dev->id);
  45         goto err;
  46     }
  47
  48     if (bus->devs[dev->id]) {
  49         bus->devs[dev->id]->info->destroy(bus->devs[dev->id]);
  50     }
  51     bus->devs[dev->id] = dev;
  52
  53     dev->info = info;
  54     return dev->info->init(dev);
  55
  56 err:
  57     return -1;
  58 }
  59
  60 void scsi_qdev_register(SCSIDeviceInfo *info)
  61 {
  62     info->qdev.bus_info = &scsi_bus_info;
  63     info->qdev.init     = scsi_qdev_init;
  64     qdev_register(&info->qdev);
  65 }
  66
  67 /* handle legacy '-drive if=scsi,...' cmd line args */
  68 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, DriveInfo *dinfo, int unit)
  69 {
  70     const char *driver;
  71     DeviceState *dev;
  72
  73     driver = bdrv_is_sg(dinfo->bdrv) ? "scsi-generic" : "scsi-disk";
  74     dev = qdev_create(&bus->qbus, driver);
  75     qdev_prop_set_uint32(dev, "scsi-id", unit);
  76     qdev_prop_set_drive(dev, "drive", dinfo);
  77     qdev_init(dev);
  78     return DO_UPCAST(SCSIDevice, qdev, dev);
  79 }
  80
  81 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
  82 {
  83     DriveInfo *dinfo;
  84     int unit;
  85
  86     for (unit = 0; unit < MAX_SCSI_DEVS; unit++) {
  87         dinfo = drive_get(IF_SCSI, bus->busnr, unit);
  88         if (dinfo == NULL) {
  89             continue;
  90         }
  91         scsi_bus_legacy_add_drive(bus, dinfo, unit);
  92     }
  93 }