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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(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 | ||
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 |