static char *spapr_get_fw_dev_path(FWPathProvider *p, BusState *bus, DeviceState *dev) { #define CAST(type, obj, name) \ ((type *)object_dynamic_cast(OBJECT(obj), (name))) SCSIDevice *d = CAST(SCSIDevice, dev, TYPE_SCSI_DEVICE); sPAPRPHBState *phb = CAST(sPAPRPHBState, dev, TYPE_SPAPR_PCI_HOST_BRIDGE); VHostSCSICommon *vsc = CAST(VHostSCSICommon, dev, TYPE_VHOST_SCSI_COMMON); if (d) { void *spapr = CAST(void, bus->parent, "spapr-vscsi"); VirtIOSCSI *virtio = CAST(VirtIOSCSI, bus->parent, TYPE_VIRTIO_SCSI); USBDevice *usb = CAST(USBDevice, bus->parent, TYPE_USB_DEVICE); if (spapr) { /* * Replace "channel@0/disk@0,0" with "disk@8000000000000000": * We use SRP luns of the form 8000 | (bus << 8) | (id << 5) | lun * in the top 16 bits of the 64-bit LUN */ unsigned id = 0x8000 | (d->id << 8) | d->lun; return g_strdup_printf("%s@%"PRIX64, qdev_fw_name(dev), (uint64_t)id << 48); } else if (virtio) { /* * We use SRP luns of the form 01000000 | (target << 8) | lun * in the top 32 bits of the 64-bit LUN * Note: the quote above is from SLOF and it is wrong, * the actual binding is: * swap 0100 or 10 << or 20 << ( target lun-id -- srplun ) */ unsigned id = 0x1000000 | (d->id << 16) | d->lun; return g_strdup_printf("%s@%"PRIX64, qdev_fw_name(dev), (uint64_t)id << 32); } else if (usb) { /* * We use SRP luns of the form 01000000 | (usb-port << 16) | lun * in the top 32 bits of the 64-bit LUN */ unsigned usb_port = atoi(usb->port->path); unsigned id = 0x1000000 | (usb_port << 16) | d->lun; return g_strdup_printf("%s@%"PRIX64, qdev_fw_name(dev), (uint64_t)id << 32); /* * SLOF probes the USB devices, and if it recognizes that the device is a * storage device, it changes its name to "storage" instead of "usb-host", * and additionally adds a child node for the SCSI LUN, so the correct * boot path in SLOF is something like .../storage@1/disk@xxx" instead. */ if (strcmp("usb-host", qdev_fw_name(dev)) == 0) { USBDevice *usbdev = CAST(USBDevice, dev, TYPE_USB_DEVICE); if (usb_host_dev_is_scsi_storage(usbdev)) { return g_strdup_printf("storage@%s/disk", usbdev->port->path); if (phb) { /* Replace "pci" with "pci@800000020000000" */ return g_strdup_printf("pci@%"PRIX64, phb->buid); if (vsc) { /* Same logic as virtio above */ unsigned id = 0x1000000 | (vsc->target << 16) | vsc->lun; return g_strdup_printf("disk@%"PRIX64, (uint64_t)id << 32); if (g_str_equal("pci-bridge", qdev_fw_name(dev))) { /* SLOF uses "pci" instead of "pci-bridge" for PCI bridges */ PCIDevice *pcidev = CAST(PCIDevice, dev, TYPE_PCI_DEVICE); return g_strdup_printf("pci@%x", PCI_SLOT(pcidev->devfn)); return NULL;