mirror of https://gitee.com/openkylin/qemu.git
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
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#include "hw.h"
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#include "sysemu.h"
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#include "scsi-disk.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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SCSIBus *scsi_bus_new(DeviceState *host, int tcq, int ndev,
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scsi_completionfn complete)
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{
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SCSIBus *bus;
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bus = FROM_QBUS(SCSIBus, qbus_create(&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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return bus;
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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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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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bus->devs[dev->id]->info->destroy(bus->devs[dev->id]);
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}
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bus->devs[dev->id] = dev;
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dev->info = info;
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return dev->info->init(dev);
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err:
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return -1;
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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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qdev_register(&info->qdev);
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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, 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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qdev_init(dev);
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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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