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 void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
  19                   scsi_completionfn complete)
  20 {
  21     qbus_create_inplace(&bus->qbus, &scsi_bus_info, host, NULL);
  22     bus->busnr = next_scsi_bus++;
  23     bus->tcq = tcq;
  24     bus->ndev = ndev;
  25     bus->complete = complete;
  26 }
  27
  28 static int scsi_qdev_init(DeviceState *qdev, DeviceInfo *base)
  29 {
  30     SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev);
  31     SCSIDeviceInfo *info = DO_UPCAST(SCSIDeviceInfo, qdev, base);
  32     SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
  33
  34     if (dev->id == -1) {
  35         for (dev->id = 0; dev->id < bus->ndev; dev->id++) {
  36             if (bus->devs[dev->id] == NULL)
  37                 break;
  38         }
  39     }
  40     if (dev->id >= bus->ndev) {
  41         qemu_error("bad scsi device id: %d\n", dev->id);
  42         goto err;
  43     }
  44
  45     if (bus->devs[dev->id]) {
  46         bus->devs[dev->id]->info->destroy(bus->devs[dev->id]);
  47     }
  48     bus->devs[dev->id] = dev;
  49
  50     dev->info = info;
  51     return dev->info->init(dev);
  52
  53 err:
  54     return -1;
  55 }
  56
  57 void scsi_qdev_register(SCSIDeviceInfo *info)
  58 {
  59     info->qdev.bus_info = &scsi_bus_info;
  60     info->qdev.init     = scsi_qdev_init;
  61     qdev_register(&info->qdev);
  62 }
  63
  64 /* handle legacy '-drive if=scsi,...' cmd line args */
  65 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, DriveInfo *dinfo, int unit)
  66 {
  67     const char *driver;
  68     DeviceState *dev;
  69
  70     driver = bdrv_is_sg(dinfo->bdrv) ? "scsi-generic" : "scsi-disk";
  71     dev = qdev_create(&bus->qbus, driver);
  72     qdev_prop_set_uint32(dev, "scsi-id", unit);
  73     qdev_prop_set_drive(dev, "drive", dinfo);
  74     qdev_init(dev);
  75     return DO_UPCAST(SCSIDevice, qdev, dev);
  76 }
  77
  78 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
  79 {
  80     DriveInfo *dinfo;
  81     int unit;
  82
  83     for (unit = 0; unit < MAX_SCSI_DEVS; unit++) {
  84         dinfo = drive_get(IF_SCSI, bus->busnr, unit);
  85         if (dinfo == NULL) {
  86             continue;
  87         }
  88         scsi_bus_legacy_add_drive(bus, dinfo, unit);
  89     }
  90 }