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 #ifdef CONFIG_PCI 12 const struct device *ctrlr = hcd_to_bus(hcd)->controller; 13 #endif 14 struct physdev_dbgp_op dbgp; 15 16 if (!xen_initial_domain()) 17 return 0; 18 19 dbgp.op = op; 20 21 #ifdef CONFIG_PCI 22 if (dev_is_pci(ctrlr)) { 23 const struct pci_dev *pdev = to_pci_dev(ctrlr); 24 25 dbgp.u.pci.seg = pci_domain_nr(pdev->bus); 26 dbgp.u.pci.bus = pdev->bus->number; 27 dbgp.u.pci.devfn = pdev->devfn; 28 dbgp.bus = PHYSDEVOP_DBGP_BUS_PCI; 29 } else 30 #endif 31 dbgp.bus = PHYSDEVOP_DBGP_BUS_UNKNOWN; 32 33 return HYPERVISOR_physdev_op(PHYSDEVOP_dbgp_op, &dbgp); 34 } 35 36 int xen_dbgp_reset_prep(struct usb_hcd *hcd) 37 { 38 return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_PREPARE); 39 } 40 41 int xen_dbgp_external_startup(struct usb_hcd *hcd) 42 { 43 return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_DONE); 44 } 45 46 #ifndef CONFIG_EARLY_PRINTK_DBGP 47 #include <linux/export.h> 48 EXPORT_SYMBOL_GPL(xen_dbgp_reset_prep); 49 EXPORT_SYMBOL_GPL(xen_dbgp_external_startup); 50 #endif 51