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#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;
QTAILQ_INIT(&dev->requests);
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);
}
}
SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun)
{
SCSIRequest *req;
req = qemu_mallocz(size);
req->bus = scsi_bus_from_device(d);
req->dev = d;
req->tag = tag;
req->lun = lun;
QTAILQ_INSERT_TAIL(&d->requests, req, next);
return req;
}
SCSIRequest *scsi_req_find(SCSIDevice *d, uint32_t tag)
{
SCSIRequest *req;
QTAILQ_FOREACH(req, &d->requests, next) {
if (req->tag == tag) {
return req;
}
}
return NULL;
}
void scsi_req_free(SCSIRequest *req)
{
QTAILQ_REMOVE(&req->dev->requests, req, next);
qemu_free(req);
}
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