| 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 | |
| 10 | static 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(bus: 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, arg: &dbgp); |
| 35 | } |
| 36 | |
| 37 | int xen_dbgp_reset_prep(struct usb_hcd *hcd) |
| 38 | { |
| 39 | return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_PREPARE); |
| 40 | } |
| 41 | |
| 42 | int 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> |
| 49 | EXPORT_SYMBOL_GPL(xen_dbgp_reset_prep); |
| 50 | EXPORT_SYMBOL_GPL(xen_dbgp_external_startup); |
| 51 | #endif |
| 52 |