1 // SPDX-License-Identifier: GPL-2.0-or-later
32 	struct acpi_device *device;  member
44 	op.u.mem_add.spfn = info->start_addr >> PAGE_SHIFT;  in xen_hotadd_memory()
45 	op.u.mem_add.epfn = (info->start_addr + info->length) >> PAGE_SHIFT;  in xen_hotadd_memory()
51 			"0x%lx -> 0x%lx, _PXM: %d, error: %d\n",  in xen_hotadd_memory()
52 			(unsigned long)info->start_addr,  in xen_hotadd_memory()
53 			(unsigned long)(info->start_addr + info->length),  in xen_hotadd_memory()
66 		return -EINVAL;  in xen_acpi_memory_enable_device()
68 	pxm = xen_acpi_get_pxm(mem_device->device->handle);  in xen_acpi_memory_enable_device()
72 	list_for_each_entry(info, &mem_device->res_list, list) {  in xen_acpi_memory_enable_device()
73 		if (info->enabled) { /* just sanity check...*/  in xen_acpi_memory_enable_device()
78 		if (!info->length)  in xen_acpi_memory_enable_device()
84 		info->enabled = 1;  in xen_acpi_memory_enable_device()
89 		return -ENODEV;  in xen_acpi_memory_enable_device()
107 	list_for_each_entry(info, &mem_device->res_list, list) {  in acpi_memory_get_resource()
108 		if ((info->caching == address64.info.mem.caching) &&  in acpi_memory_get_resource()
109 		    (info->write_protect == address64.info.mem.write_protect) &&  in acpi_memory_get_resource()
110 		    (info->start_addr + info->length == address64.address.minimum)) {  in acpi_memory_get_resource()
111 			info->length += address64.address.address_length;  in acpi_memory_get_resource()
120 	INIT_LIST_HEAD(&new->list);  in acpi_memory_get_resource()
121 	new->caching = address64.info.mem.caching;  in acpi_memory_get_resource()
122 	new->write_protect = address64.info.mem.write_protect;  in acpi_memory_get_resource()
123 	new->start_addr = address64.address.minimum;  in acpi_memory_get_resource()
124 	new->length = address64.address.address_length;  in acpi_memory_get_resource()
125 	list_add_tail(&new->list, &mem_device->res_list);  in acpi_memory_get_resource()
136 	if (!list_empty(&mem_device->res_list))  in acpi_memory_get_device_resources()
139 	status = acpi_walk_resources(mem_device->device->handle,  in acpi_memory_get_device_resources()
143 		list_for_each_entry_safe(info, n, &mem_device->res_list, list)  in acpi_memory_get_device_resources()
145 		INIT_LIST_HEAD(&mem_device->res_list);  in acpi_memory_get_device_resources()
146 		return -EINVAL;  in acpi_memory_get_device_resources()
152 static int acpi_memory_get_device(acpi_handle handle,  in acpi_memory_get_device()  argument
155 	struct acpi_device *device = NULL;  in acpi_memory_get_device()  local
160 	acpi_bus_get_device(handle, &device);  in acpi_memory_get_device()
161 	if (acpi_device_enumerated(device))  in acpi_memory_get_device()
165 	 * Now add the notified device.  This creates the acpi_device  in acpi_memory_get_device()
168 	result = acpi_bus_scan(handle);  in acpi_memory_get_device()
171 		result = -EINVAL;  in acpi_memory_get_device()
174 	device = NULL;  in acpi_memory_get_device()
175 	acpi_bus_get_device(handle, &device);  in acpi_memory_get_device()
176 	if (!acpi_device_enumerated(device)) {  in acpi_memory_get_device()
177 		pr_warn(PREFIX "Missing device object\n");  in acpi_memory_get_device()
178 		result = -EINVAL;  in acpi_memory_get_device()
183 	*mem_device = acpi_driver_data(device);  in acpi_memory_get_device()
186 		result = -ENODEV;  in acpi_memory_get_device()
199 	/* Get device present/absent information from the _STA */  in acpi_memory_check_device()
200 	if (ACPI_FAILURE(acpi_evaluate_integer(mem_device->device->handle,  in acpi_memory_check_device()
202 		return -ENODEV;  in acpi_memory_check_device()
204 	 * Check for device status. Device should be  in acpi_memory_check_device()
210 		return -ENODEV;  in acpi_memory_check_device()
219 	return -ENOSYS;  in acpi_memory_disable_device()
222 static void acpi_memory_device_notify(acpi_handle handle, u32 event, void *data)  in acpi_memory_device_notify()  argument
225 	struct acpi_device *device;  in acpi_memory_device_notify()  local
231 			"\nReceived BUS CHECK notification for device\n"));  in acpi_memory_device_notify()
236 			"\nReceived DEVICE CHECK notification for device\n"));  in acpi_memory_device_notify()
238 		if (acpi_memory_get_device(handle, &mem_device)) {  in acpi_memory_device_notify()
248 			"\nReceived EJECT REQUEST notification for device\n"));  in acpi_memory_device_notify()
251 		if (acpi_bus_get_device(handle, &device)) {  in acpi_memory_device_notify()
253 			pr_err(PREFIX "Device doesn't exist\n");  in acpi_memory_device_notify()
256 		mem_device = acpi_driver_data(device);  in acpi_memory_device_notify()
274 		/* non-hotplug event; possibly handled by other handler */  in acpi_memory_device_notify()
278 	(void) acpi_evaluate_ost(handle, event, ost_code, NULL);  in acpi_memory_device_notify()
282 static int xen_acpi_memory_device_add(struct acpi_device *device)  in xen_acpi_memory_device_add()  argument
288 	if (!device)  in xen_acpi_memory_device_add()
289 		return -EINVAL;  in xen_acpi_memory_device_add()
293 		return -ENOMEM;  in xen_acpi_memory_device_add()
295 	INIT_LIST_HEAD(&mem_device->res_list);  in xen_acpi_memory_device_add()
296 	mem_device->device = device;  in xen_acpi_memory_device_add()
297 	sprintf(acpi_device_name(device), "%s", ACPI_MEMORY_DEVICE_NAME);  in xen_acpi_memory_device_add()
298 	sprintf(acpi_device_class(device), "%s", ACPI_MEMORY_DEVICE_CLASS);  in xen_acpi_memory_device_add()
299 	device->driver_data = mem_device;  in xen_acpi_memory_device_add()
312 	 * For hot-added memory devices during runtime, it need hypercall to  in xen_acpi_memory_device_add()
324 static int xen_acpi_memory_device_remove(struct acpi_device *device)  in xen_acpi_memory_device_remove()  argument
328 	if (!device || !acpi_driver_data(device))  in xen_acpi_memory_device_remove()
329 		return -EINVAL;  in xen_acpi_memory_device_remove()
331 	mem_device = acpi_driver_data(device);  in xen_acpi_memory_device_remove()
338  * Helper function to check for memory device
340 static acpi_status is_memory_device(acpi_handle handle)  in is_memory_device()  argument
346 	status = acpi_get_object_info(handle, &info);  in is_memory_device()
350 	if (!(info->valid & ACPI_VALID_HID)) {  in is_memory_device()
355 	hardware_id = info->hardware_id.string;  in is_memory_device()
365 acpi_memory_register_notify_handler(acpi_handle handle,  in acpi_memory_register_notify_handler()  argument
370 	status = is_memory_device(handle);  in acpi_memory_register_notify_handler()
374 	status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,  in acpi_memory_register_notify_handler()
381 acpi_memory_deregister_notify_handler(acpi_handle handle,  in acpi_memory_deregister_notify_handler()  argument
386 	status = is_memory_device(handle);  in acpi_memory_deregister_notify_handler()
390 	status = acpi_remove_notify_handler(handle,  in acpi_memory_deregister_notify_handler()
419 		return -ENODEV;  in xen_acpi_memory_device_init()
427 		return -ENODEV;  in xen_acpi_memory_device_init()
439 		return -ENODEV;  in xen_acpi_memory_device_init()
472 ACPI_MODULE_NAME("xen-acpi-memhotplug");