// SPDX-License-Identifier: GPL-2.0-only/* * This file provides /sys/class/ieee80211/<wiphy name>/ * and some default attributes. * * Copyright 2005-2006	Jiri Benc <jbenc@suse.cz> * Copyright 2006	Johannes Berg <johannes@sipsolutions.net> * Copyright (C) 2020-2021, 2023-2024 Intel Corporation */ #include <linux/device.h>#include <linux/module.h>#include <linux/netdevice.h>#include <linux/nl80211.h>#include <linux/rtnetlink.h>#include <net/cfg80211.h>#include "sysfs.h"#include "core.h"#include "rdev-ops.h" static inline struct cfg80211_registered_device *dev_to_rdev(	struct device *dev){	return container_of(dev, struct cfg80211_registered_device, wiphy.dev);} #define SHOW_FMT(name, fmt, member)					\static ssize_t name ## _show(struct device *dev,			\			      struct device_attribute *attr,		\			      char *buf)				\{									\	return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);	\}									\static DEVICE_ATTR_RO(name) SHOW_FMT(index, "%d", wiphy_idx);SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);SHOW_FMT(address_mask, "%pM", wiphy.addr_mask); static ssize_t name_show(struct device *dev,			 struct device_attribute *attr,			 char *buf){	struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy; 	return sprintf(buf, "%s\n", wiphy_name(wiphy));}static DEVICE_ATTR_RO(name); static ssize_t addresses_show(struct device *dev,			      struct device_attribute *attr,			      char *buf){	struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;	char *start = buf;	int i; 	if (!wiphy->addresses)		return sprintf(buf, "%pM\n", wiphy->perm_addr); 	for (i = 0; i < wiphy->n_addresses; i++)		buf += sprintf(buf, "%pM\n", wiphy->addresses[i].addr); 	return buf - start;}static DEVICE_ATTR_RO(addresses); static struct attribute *ieee80211_attrs[] = {	&dev_attr_index.attr,	&dev_attr_macaddress.attr,	&dev_attr_address_mask.attr,	&dev_attr_addresses.attr,	&dev_attr_name.attr,	NULL,};ATTRIBUTE_GROUPS(ieee80211); static void wiphy_dev_release(struct device *dev){	struct cfg80211_registered_device *rdev = dev_to_rdev(dev); 	cfg80211_dev_free(rdev);} #ifdef CONFIG_PM_SLEEPstatic void cfg80211_leave_all(struct cfg80211_registered_device *rdev){	struct wireless_dev *wdev; 	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)		cfg80211_leave(rdev, wdev, -1);} static int wiphy_suspend(struct device *dev){	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);	int ret = 0; 	rdev->suspend_at = ktime_get_boottime_seconds(); 	rtnl_lock();	if (!rdev->wiphy.registered)		goto out_unlock_rtnl; 	if (rdev->wiphy.wowlan_config) {		scoped_guard(wiphy, &rdev->wiphy) {			cfg80211_process_wiphy_works(rdev, NULL);			if (rdev->ops->suspend)				ret = rdev_suspend(rdev,						   rdev->wiphy.wowlan_config);			if (ret <= 0)				goto out_unlock_rtnl;		}	} 	/* Driver refused to configure wowlan (ret = 1) or no wowlan */ 	cfg80211_leave_all(rdev);	scoped_guard(wiphy, &rdev->wiphy) {		cfg80211_process_rdev_events(rdev);		cfg80211_process_wiphy_works(rdev, NULL);		if (rdev->ops->suspend)			ret = rdev_suspend(rdev, NULL);	}out_unlock_rtnl:	if (ret == 0)		rdev->suspended = true;	rtnl_unlock(); 	return ret;} static int wiphy_resume(struct device *dev){	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);	int ret = 0; 	/* Age scan results with time spent in suspend */	cfg80211_bss_age(rdev, ktime_get_boottime_seconds() - rdev->suspend_at); 	rtnl_lock();	wiphy_lock(&rdev->wiphy);	if (rdev->wiphy.registered && rdev->ops->resume)		ret = rdev_resume(rdev);	rdev->suspended = false;	queue_work(system_dfl_wq, &rdev->wiphy_work);	wiphy_unlock(&rdev->wiphy); 	if (ret)		cfg80211_shutdown_all_interfaces(&rdev->wiphy); 	rtnl_unlock(); 	return ret;} static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);#define WIPHY_PM_OPS (&wiphy_pm_ops)#else#define WIPHY_PM_OPS NULL#endif static const struct ns_common *wiphy_namespace(const struct device *d){	struct wiphy *wiphy = container_of(d, struct wiphy, dev); 	return to_ns_common(wiphy_net(wiphy));} struct class ieee80211_class = {	.name = "ieee80211",	.dev_release = wiphy_dev_release,	.dev_groups = ieee80211_groups,	.pm = WIPHY_PM_OPS,	.ns_type = &net_ns_type_operations,	.namespace = wiphy_namespace,}; int wiphy_sysfs_init(void){	return class_register(&ieee80211_class);} void wiphy_sysfs_exit(void){	class_unregister(&ieee80211_class);}