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1// SPDX-License-Identifier: GPL-2.0-only2#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_PCI13 const struct device *ctrlr = hcd_to_bus(hcd)->controller;14#endif15 struct physdev_dbgp_op dbgp;16 17 if (!xen_initial_domain())18 return 0;19 20 dbgp.op = op;21 22#ifdef CONFIG_PCI23 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 } else31#endif32 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_DBGP48#include <linux/export.h>49EXPORT_SYMBOL_GPL(xen_dbgp_reset_prep);50EXPORT_SYMBOL_GPL(xen_dbgp_external_startup);51#endif52