drivers/xen/pci.c

1 // SPDX-License-Identifier: GPL-2.0-only
8 #include <linux/pci.h>
10 #include <linux/pci-acpi.h>
11 #include <xen/pci.h>
18 #include "../pci/pci.h"
32 	struct pci_dev *physfn = pci_dev->physfn;  in xen_add_device()
51 			.add.seg = pci_domain_nr(pci_dev->bus),  in xen_add_device()
52 			.add.bus = pci_dev->bus->number,  in xen_add_device()
53 			.add.devfn = pci_dev->devfn  in xen_add_device()
62 		if (pci_dev->is_virtfn) {  in xen_add_device()
63 			add->flags = XEN_PCI_DEV_VIRTFN;  in xen_add_device()
64 			add->physfn.bus = physfn->bus->number;  in xen_add_device()
65 			add->physfn.devfn = physfn->devfn;  in xen_add_device()
68 		if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn))  in xen_add_device()
69 			add->flags = XEN_PCI_DEV_EXTFN;  in xen_add_device()
72 		handle = ACPI_HANDLE(&pci_dev->dev);  in xen_add_device()
74 		if (!handle && pci_dev->is_virtfn)  in xen_add_device()
75 			handle = ACPI_HANDLE(physfn->bus->bridge);  in xen_add_device()
80 			 * all. Try to get acpi handle of parent pci bus.  in xen_add_device()
83 			for (pbus = pci_dev->bus; pbus; pbus = pbus->parent) {  in xen_add_device()
98 					add->optarr[0] = pxm;  in xen_add_device()
99 					add->flags |= XEN_PCI_DEV_PXM;  in xen_add_device()
108 		if (r != -ENOSYS)  in xen_add_device()
113 	if (pci_domain_nr(pci_dev->bus))  in xen_add_device()
114 		r = -ENOSYS;  in xen_add_device()
116 	else if (pci_dev->is_virtfn) {  in xen_add_device()
118 			.bus		= pci_dev->bus->number,  in xen_add_device()
119 			.devfn		= pci_dev->devfn,  in xen_add_device()
121 			.physfn.bus	= physfn->bus->number,  in xen_add_device()
122 			.physfn.devfn	= physfn->devfn,  in xen_add_device()
129 	else if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn)) {  in xen_add_device()
131 			.bus		= pci_dev->bus->number,  in xen_add_device()
132 			.devfn		= pci_dev->devfn,  in xen_add_device()
140 			.bus	= pci_dev->bus->number,  in xen_add_device()
141 			.devfn	= pci_dev->devfn,  in xen_add_device()
158 			.seg = pci_domain_nr(pci_dev->bus),  in xen_remove_device()
159 			.bus = pci_dev->bus->number,  in xen_remove_device()
160 			.devfn = pci_dev->devfn  in xen_remove_device()
165 	} else if (pci_domain_nr(pci_dev->bus))  in xen_remove_device()
166 		r = -ENOSYS;  in xen_remove_device()
169 			.bus = pci_dev->bus->number,  in xen_remove_device()
170 			.devfn = pci_dev->devfn  in xen_remove_device()
197 		dev_err(dev, "Failed to %s - passthrough or MSI/MSI-X might fail!\n",  in xen_pci_notifier()
236 		r.address = cfg->address;  in xen_mcfg_late()
237 		r.segment = cfg->segment;  in xen_mcfg_late()
238 		r.start_bus = cfg->start_bus;  in xen_mcfg_late()
239 		r.end_bus = cfg->end_bus;  in xen_mcfg_late()
245 		case -ENOSYS:  in xen_mcfg_late()
252 				cfg->name, rc);  in xen_mcfg_late()
261 	domid_t domain;  member
274 		if (owner->dev == dev)  in find_device()
283 	int domain = -ENODEV;  in xen_find_device_domain_owner()  local
288 		domain = owner->domain;  in xen_find_device_domain_owner()
290 	return domain;  in xen_find_device_domain_owner()
294 int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain)  in xen_register_device_domain_owner()  argument
300 		return -ENODEV;  in xen_register_device_domain_owner()
306 		return -EEXIST;  in xen_register_device_domain_owner()
308 	owner->domain = domain;  in xen_register_device_domain_owner()
309 	owner->dev = dev;  in xen_register_device_domain_owner()
310 	list_add_tail(&owner->list, &dev_domain_list);  in xen_register_device_domain_owner()
324 		return -ENODEV;  in xen_unregister_device_domain_owner()
326 	list_del(&owner->list);  in xen_unregister_device_domain_owner()