s390: Refactor IPL parameter block generation
Splitting out the the CCW device extraction allows reuse. Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com> Message-Id: <1522940844-12336-2-git-send-email-mihajlov@linux.vnet.ibm.com> Reviewed-by: Farhan Ali <alifm@linux.vnet.ibm.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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@ -279,44 +279,52 @@ static void s390_ipl_set_boot_menu(S390IPLState *ipl)
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*timeout = cpu_to_be32(splash_time);
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}
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static bool s390_gen_initial_iplb(S390IPLState *ipl)
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static CcwDevice *s390_get_ccw_device(DeviceState *dev_st)
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{
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DeviceState *dev_st;
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CcwDevice *ccw_dev = NULL;
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dev_st = get_boot_device(0);
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if (dev_st) {
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VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
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object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
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TYPE_VIRTIO_CCW_DEVICE);
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TYPE_VIRTIO_CCW_DEVICE);
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if (virtio_ccw_dev) {
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ccw_dev = CCW_DEVICE(virtio_ccw_dev);
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} else {
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SCSIDevice *sd = (SCSIDevice *)
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object_dynamic_cast(OBJECT(dev_st),
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TYPE_SCSI_DEVICE);
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if (sd) {
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SCSIBus *bus = scsi_bus_from_device(sd);
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VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
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VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
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vdev);
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ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
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TYPE_CCW_DEVICE);
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}
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}
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}
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return ccw_dev;
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}
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static bool s390_gen_initial_iplb(S390IPLState *ipl)
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{
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DeviceState *dev_st;
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CcwDevice *ccw_dev = NULL;
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dev_st = get_boot_device(0);
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if (dev_st) {
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ccw_dev = s390_get_ccw_device(dev_st);
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}
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/*
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* Currently allow IPL only from CCW devices.
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*/
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if (ccw_dev) {
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SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
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TYPE_SCSI_DEVICE);
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VirtIONet *vn = (VirtIONet *) object_dynamic_cast(OBJECT(dev_st),
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TYPE_VIRTIO_NET);
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if (vn) {
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ipl->netboot = true;
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}
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if (virtio_ccw_dev) {
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CcwDevice *ccw_dev = CCW_DEVICE(virtio_ccw_dev);
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ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
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ipl->iplb.blk0_len =
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cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
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ipl->iplb.pbt = S390_IPL_TYPE_CCW;
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ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
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ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
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} else if (sd) {
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SCSIBus *bus = scsi_bus_from_device(sd);
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VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
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VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw, vdev);
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CcwDevice *ccw_dev;
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ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
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TYPE_CCW_DEVICE);
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if (!ccw_dev) { /* It might be a PCI device instead */
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return false;
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}
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if (sd) {
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ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
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ipl->iplb.blk0_len =
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cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
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@ -327,12 +335,25 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl)
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ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
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ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
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} else {
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return false; /* unknown device */
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VirtIONet *vn = (VirtIONet *) object_dynamic_cast(OBJECT(dev_st),
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TYPE_VIRTIO_NET);
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ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
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ipl->iplb.blk0_len =
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cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
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ipl->iplb.pbt = S390_IPL_TYPE_CCW;
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ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
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ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
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if (vn) {
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ipl->netboot = true;
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}
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}
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if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
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ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
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}
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return true;
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}
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