Symbol: XHCI_DBOFF
usr/src/cmd/bhyve/common/pci_xhci.c
2378
case XHCI_DBOFF: /* 0x14 */
usr/src/uts/common/io/usb/hcd/xhci/xhci.c
1188
xhcip->xhci_regs_dooroff = xhci_get32(xhcip, XHCI_R_CAP, XHCI_DBOFF);