1 #include <linux/pci.h> 2 #include <linux/usb.h> 3 #include <linux/usb/ehci_def.h> 4 #include <linux/usb/hcd.h> 5 #include <asm/xen/hypercall.h> 6 #include <xen/interface/physdev.h> 7 #include <xen/xen.h> 8 9 static int xen_dbgp_op(struct usb_hcd *hcd, int op) 10 { 11 const struct device *ctrlr = hcd_to_bus(hcd)->controller; 12 struct physdev_dbgp_op dbgp; 13 14 if (!xen_initial_domain()) 15 return 0; 16 17 dbgp.op = op; 18 19 #ifdef CONFIG_PCI 20 if (ctrlr->bus == &pci_bus_type) { 21 const struct pci_dev *pdev = to_pci_dev(ctrlr); 22 23 dbgp.u.pci.seg = pci_domain_nr(pdev->bus); 24 dbgp.u.pci.bus = pdev->bus->number; 25 dbgp.u.pci.devfn = pdev->devfn; 26 dbgp.bus = PHYSDEVOP_DBGP_BUS_PCI; 27 } else 28 #endif 29 dbgp.bus = PHYSDEVOP_DBGP_BUS_UNKNOWN; 30 31 return HYPERVISOR_physdev_op(PHYSDEVOP_dbgp_op, &dbgp); 32 } 33 34 int xen_dbgp_reset_prep(struct usb_hcd *hcd) 35 { 36 return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_PREPARE); 37 } 38 39 int xen_dbgp_external_startup(struct usb_hcd *hcd) 40 { 41 return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_DONE); 42 } 43 44 #ifndef CONFIG_EARLY_PRINTK_DBGP 45 #include <linux/export.h> 46 EXPORT_SYMBOL_GPL(xen_dbgp_reset_prep); 47 EXPORT_SYMBOL_GPL(xen_dbgp_external_startup); 48 #endif 49