162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * OCB mode implementation 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright: (c) 2014 Czech Technical University in Prague 662306a36Sopenharmony_ci * (c) 2014 Volkswagen Group Research 762306a36Sopenharmony_ci * Copyright (C) 2022 Intel Corporation 862306a36Sopenharmony_ci * Author: Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz> 962306a36Sopenharmony_ci * Funded by: Volkswagen Group Research 1062306a36Sopenharmony_ci */ 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ci#include <linux/ieee80211.h> 1362306a36Sopenharmony_ci#include <net/cfg80211.h> 1462306a36Sopenharmony_ci#include "nl80211.h" 1562306a36Sopenharmony_ci#include "core.h" 1662306a36Sopenharmony_ci#include "rdev-ops.h" 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ciint __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 1962306a36Sopenharmony_ci struct net_device *dev, 2062306a36Sopenharmony_ci struct ocb_setup *setup) 2162306a36Sopenharmony_ci{ 2262306a36Sopenharmony_ci struct wireless_dev *wdev = dev->ieee80211_ptr; 2362306a36Sopenharmony_ci int err; 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci ASSERT_WDEV_LOCK(wdev); 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ci if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB) 2862306a36Sopenharmony_ci return -EOPNOTSUPP; 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ci if (!rdev->ops->join_ocb) 3162306a36Sopenharmony_ci return -EOPNOTSUPP; 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ci if (WARN_ON(!setup->chandef.chan)) 3462306a36Sopenharmony_ci return -EINVAL; 3562306a36Sopenharmony_ci 3662306a36Sopenharmony_ci err = rdev_join_ocb(rdev, dev, setup); 3762306a36Sopenharmony_ci if (!err) 3862306a36Sopenharmony_ci wdev->u.ocb.chandef = setup->chandef; 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ci return err; 4162306a36Sopenharmony_ci} 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ciint cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 4462306a36Sopenharmony_ci struct net_device *dev, 4562306a36Sopenharmony_ci struct ocb_setup *setup) 4662306a36Sopenharmony_ci{ 4762306a36Sopenharmony_ci struct wireless_dev *wdev = dev->ieee80211_ptr; 4862306a36Sopenharmony_ci int err; 4962306a36Sopenharmony_ci 5062306a36Sopenharmony_ci wdev_lock(wdev); 5162306a36Sopenharmony_ci err = __cfg80211_join_ocb(rdev, dev, setup); 5262306a36Sopenharmony_ci wdev_unlock(wdev); 5362306a36Sopenharmony_ci 5462306a36Sopenharmony_ci return err; 5562306a36Sopenharmony_ci} 5662306a36Sopenharmony_ci 5762306a36Sopenharmony_ciint __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 5862306a36Sopenharmony_ci struct net_device *dev) 5962306a36Sopenharmony_ci{ 6062306a36Sopenharmony_ci struct wireless_dev *wdev = dev->ieee80211_ptr; 6162306a36Sopenharmony_ci int err; 6262306a36Sopenharmony_ci 6362306a36Sopenharmony_ci ASSERT_WDEV_LOCK(wdev); 6462306a36Sopenharmony_ci 6562306a36Sopenharmony_ci if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB) 6662306a36Sopenharmony_ci return -EOPNOTSUPP; 6762306a36Sopenharmony_ci 6862306a36Sopenharmony_ci if (!rdev->ops->leave_ocb) 6962306a36Sopenharmony_ci return -EOPNOTSUPP; 7062306a36Sopenharmony_ci 7162306a36Sopenharmony_ci if (!wdev->u.ocb.chandef.chan) 7262306a36Sopenharmony_ci return -ENOTCONN; 7362306a36Sopenharmony_ci 7462306a36Sopenharmony_ci err = rdev_leave_ocb(rdev, dev); 7562306a36Sopenharmony_ci if (!err) 7662306a36Sopenharmony_ci memset(&wdev->u.ocb.chandef, 0, sizeof(wdev->u.ocb.chandef)); 7762306a36Sopenharmony_ci 7862306a36Sopenharmony_ci return err; 7962306a36Sopenharmony_ci} 8062306a36Sopenharmony_ci 8162306a36Sopenharmony_ciint cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 8262306a36Sopenharmony_ci struct net_device *dev) 8362306a36Sopenharmony_ci{ 8462306a36Sopenharmony_ci struct wireless_dev *wdev = dev->ieee80211_ptr; 8562306a36Sopenharmony_ci int err; 8662306a36Sopenharmony_ci 8762306a36Sopenharmony_ci wdev_lock(wdev); 8862306a36Sopenharmony_ci err = __cfg80211_leave_ocb(rdev, dev); 8962306a36Sopenharmony_ci wdev_unlock(wdev); 9062306a36Sopenharmony_ci 9162306a36Sopenharmony_ci return err; 9262306a36Sopenharmony_ci} 93