Archipelago » qemu

#include "hw.h"

#include "sysemu.h"

#include "scsi.h"

#include "block.h"

#include "qdev.h"

static struct BusInfo scsi_bus_info = {

    .name  = "SCSI",

    .size  = sizeof(SCSIBus),

    .props = (Property[]) {

        DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1),

        DEFINE_PROP_END_OF_LIST(),

    },

};

static int next_scsi_bus;

/* Create a scsi bus, and attach devices to it.  */

void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,

                  scsi_completionfn complete)

{

    qbus_create_inplace(&bus->qbus, &scsi_bus_info, host, NULL);

    bus->busnr = next_scsi_bus++;

    bus->tcq = tcq;

    bus->ndev = ndev;

    bus->complete = complete;

    bus->qbus.allow_hotplug = 1;

}

static int scsi_qdev_init(DeviceState *qdev, DeviceInfo *base)

{

    SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev);

    SCSIDeviceInfo *info = DO_UPCAST(SCSIDeviceInfo, qdev, base);

    SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);

    int rc = -1;

    if (dev->id == -1) {

        for (dev->id = 0; dev->id < bus->ndev; dev->id++) {

            if (bus->devs[dev->id] == NULL)

                break;

        }

    }

    if (dev->id >= bus->ndev) {

        qemu_error("bad scsi device id: %d\n", dev->id);

        goto err;

    }

    if (bus->devs[dev->id]) {

        qdev_free(&bus->devs[dev->id]->qdev);

    }

    bus->devs[dev->id] = dev;

    dev->info = info;

    rc = dev->info->init(dev);

    if (rc != 0) {

        bus->devs[dev->id] = NULL;

    }

err:

    return rc;

}

static int scsi_qdev_exit(DeviceState *qdev)

{

    SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev);

    SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);

    assert(bus->devs[dev->id] != NULL);

    if (bus->devs[dev->id]->info->destroy) {

        bus->devs[dev->id]->info->destroy(bus->devs[dev->id]);

    }

    bus->devs[dev->id] = NULL;

    return 0;

}

void scsi_qdev_register(SCSIDeviceInfo *info)

{

    info->qdev.bus_info = &scsi_bus_info;

    info->qdev.init     = scsi_qdev_init;

    info->qdev.unplug   = qdev_simple_unplug_cb;

    info->qdev.exit     = scsi_qdev_exit;

    qdev_register(&info->qdev);

}

/* handle legacy '-drive if=scsi,...' cmd line args */

/* FIXME callers should check for failure, but don't */

SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, DriveInfo *dinfo, int unit)

{

    const char *driver;

    DeviceState *dev;

    driver = bdrv_is_sg(dinfo->bdrv) ? "scsi-generic" : "scsi-disk";

    dev = qdev_create(&bus->qbus, driver);

    qdev_prop_set_uint32(dev, "scsi-id", unit);

    qdev_prop_set_drive(dev, "drive", dinfo);

    if (qdev_init(dev) < 0)

        return NULL;

    return DO_UPCAST(SCSIDevice, qdev, dev);

}

void scsi_bus_legacy_handle_cmdline(SCSIBus *bus)

{

    DriveInfo *dinfo;

    int unit;

    for (unit = 0; unit < MAX_SCSI_DEVS; unit++) {

        dinfo = drive_get(IF_SCSI, bus->busnr, unit);

        if (dinfo == NULL) {

            continue;

        }

        scsi_bus_legacy_add_drive(bus, dinfo, unit);

    }

}