1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only 2*4882a593Smuzhiyun #include <linux/pci.h> 3*4882a593Smuzhiyun #include <linux/usb.h> 4*4882a593Smuzhiyun #include <linux/usb/ehci_def.h> 5*4882a593Smuzhiyun #include <linux/usb/hcd.h> 6*4882a593Smuzhiyun #include <asm/xen/hypercall.h> 7*4882a593Smuzhiyun #include <xen/interface/physdev.h> 8*4882a593Smuzhiyun #include <xen/xen.h> 9*4882a593Smuzhiyun xen_dbgp_op(struct usb_hcd * hcd,int op)10*4882a593Smuzhiyunstatic int xen_dbgp_op(struct usb_hcd *hcd, int op) 11*4882a593Smuzhiyun { 12*4882a593Smuzhiyun #ifdef CONFIG_PCI 13*4882a593Smuzhiyun const struct device *ctrlr = hcd_to_bus(hcd)->controller; 14*4882a593Smuzhiyun #endif 15*4882a593Smuzhiyun struct physdev_dbgp_op dbgp; 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun if (!xen_initial_domain()) 18*4882a593Smuzhiyun return 0; 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun dbgp.op = op; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #ifdef CONFIG_PCI 23*4882a593Smuzhiyun if (dev_is_pci(ctrlr)) { 24*4882a593Smuzhiyun const struct pci_dev *pdev = to_pci_dev(ctrlr); 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun dbgp.u.pci.seg = pci_domain_nr(pdev->bus); 27*4882a593Smuzhiyun dbgp.u.pci.bus = pdev->bus->number; 28*4882a593Smuzhiyun dbgp.u.pci.devfn = pdev->devfn; 29*4882a593Smuzhiyun dbgp.bus = PHYSDEVOP_DBGP_BUS_PCI; 30*4882a593Smuzhiyun } else 31*4882a593Smuzhiyun #endif 32*4882a593Smuzhiyun dbgp.bus = PHYSDEVOP_DBGP_BUS_UNKNOWN; 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun return HYPERVISOR_physdev_op(PHYSDEVOP_dbgp_op, &dbgp); 35*4882a593Smuzhiyun } 36*4882a593Smuzhiyun xen_dbgp_reset_prep(struct usb_hcd * hcd)37*4882a593Smuzhiyunint xen_dbgp_reset_prep(struct usb_hcd *hcd) 38*4882a593Smuzhiyun { 39*4882a593Smuzhiyun return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_PREPARE); 40*4882a593Smuzhiyun } 41*4882a593Smuzhiyun xen_dbgp_external_startup(struct usb_hcd * hcd)42*4882a593Smuzhiyunint xen_dbgp_external_startup(struct usb_hcd *hcd) 43*4882a593Smuzhiyun { 44*4882a593Smuzhiyun return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_DONE); 45*4882a593Smuzhiyun } 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun #ifndef CONFIG_EARLY_PRINTK_DBGP 48*4882a593Smuzhiyun #include <linux/export.h> 49*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(xen_dbgp_reset_prep); 50*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(xen_dbgp_external_startup); 51*4882a593Smuzhiyun #endif 52