1// SPDX-License-Identifier: GPL-2.0-only 2#include <linux/pci.h> 3#include <linux/usb.h> 4#include <linux/usb/ehci_def.h> 5#include <linux/usb/hcd.h> 6#include <asm/xen/hypercall.h> 7#include <xen/interface/physdev.h> 8#include <xen/xen.h> 9 10static int xen_dbgp_op(struct usb_hcd *hcd, int op) 11{ 12#ifdef CONFIG_PCI 13 const struct device *ctrlr = hcd_to_bus(hcd)->controller; 14#endif 15 struct physdev_dbgp_op dbgp; 16 17 if (!xen_initial_domain()) 18 return 0; 19 20 dbgp.op = op; 21 22#ifdef CONFIG_PCI 23 if (dev_is_pci(ctrlr)) { 24 const struct pci_dev *pdev = to_pci_dev(ctrlr); 25 26 dbgp.u.pci.seg = pci_domain_nr(pdev->bus); 27 dbgp.u.pci.bus = pdev->bus->number; 28 dbgp.u.pci.devfn = pdev->devfn; 29 dbgp.bus = PHYSDEVOP_DBGP_BUS_PCI; 30 } else 31#endif 32 dbgp.bus = PHYSDEVOP_DBGP_BUS_UNKNOWN; 33 34 return HYPERVISOR_physdev_op(PHYSDEVOP_dbgp_op, &dbgp); 35} 36 37int xen_dbgp_reset_prep(struct usb_hcd *hcd) 38{ 39 return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_PREPARE); 40} 41 42int xen_dbgp_external_startup(struct usb_hcd *hcd) 43{ 44 return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_DONE); 45} 46 47#ifndef CONFIG_EARLY_PRINTK_DBGP 48#include <linux/export.h> 49EXPORT_SYMBOL_GPL(xen_dbgp_reset_prep); 50EXPORT_SYMBOL_GPL(xen_dbgp_external_startup); 51#endif 52