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/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2007, 2008, 2009 Siemens AG * * Written by: * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> */ #ifndef __NET_CFG802154_H #define __NET_CFG802154_H #include <linux/ieee802154.h> #include <linux/netdevice.h> #include <linux/spinlock.h> #include <linux/bug.h> #include <net/nl802154.h> struct wpan_phy; struct wpan_phy_cca; struct cfg802154_scan_request; struct cfg802154_beacon_request; struct ieee802154_addr; #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL struct ieee802154_llsec_device_key; struct ieee802154_llsec_seclevel; struct ieee802154_llsec_params; struct ieee802154_llsec_device; struct ieee802154_llsec_table; struct ieee802154_llsec_key_id; struct ieee802154_llsec_key; #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */ struct cfg802154_ops { struct net_device * (*add_virtual_intf_deprecated)(struct wpan_phy *wpan_phy, const char *name, unsigned char name_assign_type, int type); void (*del_virtual_intf_deprecated)(struct wpan_phy *wpan_phy, struct net_device *dev); int (*suspend)(struct wpan_phy *wpan_phy); int (*resume)(struct wpan_phy *wpan_phy); int (*add_virtual_intf)(struct wpan_phy *wpan_phy, const char *name, unsigned char name_assign_type, enum nl802154_iftype type, __le64 extended_addr); int (*del_virtual_intf)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev); int (*set_channel)(struct wpan_phy *wpan_phy, u8 page, u8 channel); int (*set_cca_mode)(struct wpan_phy *wpan_phy, const struct wpan_phy_cca *cca); int (*set_cca_ed_level)(struct wpan_phy *wpan_phy, s32 ed_level); int (*set_tx_power)(struct wpan_phy *wpan_phy, s32 power); int (*set_pan_id)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, __le16 pan_id); int (*set_short_addr)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, __le16 short_addr); int (*set_backoff_exponent)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, u8 min_be, u8 max_be); int (*set_max_csma_backoffs)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, u8 max_csma_backoffs); int (*set_max_frame_retries)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, s8 max_frame_retries); int (*set_lbt_mode)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, bool mode); int (*set_ackreq_default)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, bool ackreq); int (*trigger_scan)(struct wpan_phy *wpan_phy, struct cfg802154_scan_request *request); int (*abort_scan)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev); int (*send_beacons)(struct wpan_phy *wpan_phy, struct cfg802154_beacon_request *request); int (*stop_beacons)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev); int (*associate)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, struct ieee802154_addr *coord); int (*disassociate)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, struct ieee802154_addr *target); #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL void (*get_llsec_table)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, struct ieee802154_llsec_table **table); void (*lock_llsec_table)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev); void (*unlock_llsec_table)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev); /* TODO remove locking/get table callbacks, this is part of the * nl802154 interface and should be accessible from ieee802154 layer. */ int (*get_llsec_params)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, struct ieee802154_llsec_params *params); int (*set_llsec_params)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, const struct ieee802154_llsec_params *params, int changed); int (*add_llsec_key)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, const struct ieee802154_llsec_key_id *id, const struct ieee802154_llsec_key *key); int (*del_llsec_key)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, const struct ieee802154_llsec_key_id *id); int (*add_seclevel)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, const struct ieee802154_llsec_seclevel *sl); int (*del_seclevel)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, const struct ieee802154_llsec_seclevel *sl); int (*add_device)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, const struct ieee802154_llsec_device *dev); int (*del_device)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, __le64 extended_addr); int (*add_devkey)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, __le64 extended_addr, const struct ieee802154_llsec_device_key *key); int (*del_devkey)(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, __le64 extended_addr, const struct ieee802154_llsec_device_key *key); #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */ }; static inline bool wpan_phy_supported_bool(bool b, enum nl802154_supported_bool_states st) { switch (st) { case NL802154_SUPPORTED_BOOL_TRUE: return b; case NL802154_SUPPORTED_BOOL_FALSE: return !b; case NL802154_SUPPORTED_BOOL_BOTH: return true; default: WARN_ON(1); } return false; } struct wpan_phy_supported { u32 channels[IEEE802154_MAX_PAGE + 1], cca_modes, cca_opts, iftypes; enum nl802154_supported_bool_states lbt; u8 min_minbe, max_minbe, min_maxbe, max_maxbe, min_csma_backoffs, max_csma_backoffs; s8 min_frame_retries, max_frame_retries; size_t tx_powers_size, cca_ed_levels_size; const s32 *tx_powers, *cca_ed_levels; }; struct wpan_phy_cca { enum nl802154_cca_modes mode; enum nl802154_cca_opts opt; }; static inline bool wpan_phy_cca_cmp(const struct wpan_phy_cca *a, const struct wpan_phy_cca *b) { if (a->mode != b->mode) return false; if (a->mode == NL802154_CCA_ENERGY_CARRIER) return a->opt == b->opt; return true; } /** * enum wpan_phy_flags - WPAN PHY state flags * @WPAN_PHY_FLAG_TXPOWER: Indicates that transceiver will support * transmit power setting. * @WPAN_PHY_FLAG_CCA_ED_LEVEL: Indicates that transceiver will support cca ed * level setting. * @WPAN_PHY_FLAG_CCA_MODE: Indicates that transceiver will support cca mode * setting. * @WPAN_PHY_FLAG_STATE_QUEUE_STOPPED: Indicates that the transmit queue was * temporarily stopped. * @WPAN_PHY_FLAG_DATAGRAMS_ONLY: Indicates that transceiver is only able to * send/receive datagrams. */ enum wpan_phy_flags { WPAN_PHY_FLAG_TXPOWER = BIT(1), WPAN_PHY_FLAG_CCA_ED_LEVEL = BIT(2), WPAN_PHY_FLAG_CCA_MODE = BIT(3), WPAN_PHY_FLAG_STATE_QUEUE_STOPPED = BIT(4), WPAN_PHY_FLAG_DATAGRAMS_ONLY = BIT(5), }; struct wpan_phy { /* If multiple wpan_phys are registered and you're handed e.g. * a regular netdev with assigned ieee802154_ptr, you won't * know whether it points to a wpan_phy your driver has registered * or not. Assign this to something global to your driver to * help determine whether you own this wpan_phy or not. */ const void *privid; unsigned long flags; /* * This is a PIB according to 802.15.4-2011. * We do not provide timing-related variables, as they * aren't used outside of driver */ u8 current_channel; u8 current_page; struct wpan_phy_supported supported; /* current transmit_power in mBm */ s32 transmit_power; struct wpan_phy_cca cca; __le64 perm_extended_addr; /* current cca ed threshold in mBm */ s32 cca_ed_level; /* PHY depended MAC PIB values */ /* 802.15.4 acronym: Tdsym in nsec */ u32 symbol_duration; /* lifs and sifs periods timing */ u16 lifs_period; u16 sifs_period; struct device dev; /* the network namespace this phy lives in currently */ possible_net_t _net; /* Transmission monitoring and control */ spinlock_t queue_lock; atomic_t ongoing_txs; atomic_t hold_txs; wait_queue_head_t sync_txq; /* Current filtering level on reception. * Only allowed to be changed if phy is not operational. */ enum ieee802154_filtering_level filtering; char priv[] __aligned(NETDEV_ALIGN); }; static inline struct net *wpan_phy_net(struct wpan_phy *wpan_phy) { return read_pnet(&wpan_phy->_net); } static inline void wpan_phy_net_set(struct wpan_phy *wpan_phy, struct net *net) { write_pnet(&wpan_phy->_net, net); } static inline bool ieee802154_chan_is_valid(struct wpan_phy *phy, u8 page, u8 channel) { if (page > IEEE802154_MAX_PAGE || channel > IEEE802154_MAX_CHANNEL || !(phy->supported.channels[page] & BIT(channel))) return false; return true; } /** * struct ieee802154_addr - IEEE802.15.4 device address * @mode: Address mode from frame header. Can be one of: * - @IEEE802154_ADDR_NONE * - @IEEE802154_ADDR_SHORT * - @IEEE802154_ADDR_LONG * @pan_id: The PAN ID this address belongs to * @short_addr: address if @mode is @IEEE802154_ADDR_SHORT * @extended_addr: address if @mode is @IEEE802154_ADDR_LONG */ struct ieee802154_addr { u8 mode; __le16 pan_id; union { __le16 short_addr; __le64 extended_addr; }; }; /** * struct ieee802154_coord_desc - Coordinator descriptor * @addr: PAN ID and coordinator address * @page: page this coordinator is using * @channel: channel this coordinator is using * @superframe_spec: SuperFrame specification as received * @link_quality: link quality indicator at which the beacon was received * @gts_permit: the coordinator accepts GTS requests */ struct ieee802154_coord_desc { struct ieee802154_addr addr; u8 page; u8 channel; u16 superframe_spec; u8 link_quality; bool gts_permit; }; /** * struct ieee802154_pan_device - PAN device information * @pan_id: the PAN ID of this device * @mode: the preferred mode to reach the device * @short_addr: the short address of this device * @extended_addr: the extended address of this device * @node: the list node */ struct ieee802154_pan_device { __le16 pan_id; u8 mode; __le16 short_addr; __le64 extended_addr; struct list_head node; }; /** * struct cfg802154_scan_request - Scan request * * @type: type of scan to be performed * @page: page on which to perform the scan * @channels: channels in te %page to be scanned * @duration: time spent on each channel, calculated with: * aBaseSuperframeDuration * (2 ^ duration + 1) * @wpan_dev: the wpan device on which to perform the scan * @wpan_phy: the wpan phy on which to perform the scan */ struct cfg802154_scan_request { enum nl802154_scan_types type; u8 page; u32 channels; u8 duration; struct wpan_dev *wpan_dev; struct wpan_phy *wpan_phy; }; /** * struct cfg802154_beacon_request - Beacon request descriptor * * @interval: interval n between sendings, in multiple order of the super frame * duration: aBaseSuperframeDuration * (2^n) unless the interval * order is greater or equal to 15, in this case beacons won't be * passively sent out at a fixed rate but instead inform the device * that it should answer beacon requests as part of active scan * procedures * @wpan_dev: the concerned wpan device * @wpan_phy: the wpan phy this was for */ struct cfg802154_beacon_request { u8 interval; struct wpan_dev *wpan_dev; struct wpan_phy *wpan_phy; }; /** * struct cfg802154_mac_pkt - MAC packet descriptor (beacon/command) * @node: MAC packets to process list member * @skb: the received sk_buff * @sdata: the interface on which @skb was received * @page: page configuration when @skb was received * @channel: channel configuration when @skb was received */ struct cfg802154_mac_pkt { struct list_head node; struct sk_buff *skb; struct ieee802154_sub_if_data *sdata; u8 page; u8 channel; }; struct ieee802154_llsec_key_id { u8 mode; u8 id; union { struct ieee802154_addr device_addr; __le32 short_source; __le64 extended_source; }; }; #define IEEE802154_LLSEC_KEY_SIZE 16 struct ieee802154_llsec_key { u8 frame_types; u32 cmd_frame_ids; /* TODO replace with NL802154_KEY_SIZE */ u8 key[IEEE802154_LLSEC_KEY_SIZE]; }; struct ieee802154_llsec_key_entry { struct list_head list; struct rcu_head rcu; struct ieee802154_llsec_key_id id; struct ieee802154_llsec_key *key; }; struct ieee802154_llsec_params { bool enabled; __be32 frame_counter; u8 out_level; struct ieee802154_llsec_key_id out_key; __le64 default_key_source; __le16 pan_id; __le64 hwaddr; __le64 coord_hwaddr; __le16 coord_shortaddr; }; struct ieee802154_llsec_table { struct list_head keys; struct list_head devices; struct list_head security_levels; }; struct ieee802154_llsec_seclevel { struct list_head list; u8 frame_type; u8 cmd_frame_id; bool device_override; u32 sec_levels; }; struct ieee802154_llsec_device { struct list_head list; __le16 pan_id; __le16 short_addr; __le64 hwaddr; u32 frame_counter; bool seclevel_exempt; u8 key_mode; struct list_head keys; }; struct ieee802154_llsec_device_key { struct list_head list; struct ieee802154_llsec_key_id key_id; u32 frame_counter; }; struct wpan_dev_header_ops { /* TODO create callback currently assumes ieee802154_mac_cb inside * skb->cb. This should be changed to give these information as * parameter. */ int (*create)(struct sk_buff *skb, struct net_device *dev, const struct ieee802154_addr *daddr, const struct ieee802154_addr *saddr, unsigned int len); }; struct wpan_dev { struct wpan_phy *wpan_phy; int iftype; /* the remainder of this struct should be private to cfg802154 */ struct list_head list; struct net_device *netdev; const struct wpan_dev_header_ops *header_ops; /* lowpan interface, set when the wpan_dev belongs to one lowpan_dev */ struct net_device *lowpan_dev; u32 identifier; /* MAC PIB */ __le16 pan_id; __le16 short_addr; __le64 extended_addr; /* MAC BSN field */ atomic_t bsn; /* MAC DSN field */ atomic_t dsn; u8 min_be; u8 max_be; u8 csma_retries; s8 frame_retries; bool lbt; /* fallback for acknowledgment bit setting */ bool ackreq; /* Associations */ struct mutex association_lock; struct ieee802154_pan_device *parent; struct list_head children; unsigned int max_associations; unsigned int nchildren; }; #define to_phy(_dev) container_of(_dev, struct wpan_phy, dev) #if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN) static inline int wpan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, const struct ieee802154_addr *daddr, const struct ieee802154_addr *saddr, unsigned int len) { struct wpan_dev *wpan_dev = dev->ieee802154_ptr; return wpan_dev->header_ops->create(skb, dev, daddr, saddr, len); } #endif struct wpan_phy * wpan_phy_new(const struct cfg802154_ops *ops, size_t priv_size); static inline void wpan_phy_set_dev(struct wpan_phy *phy, struct device *dev) { phy->dev.parent = dev; } int wpan_phy_register(struct wpan_phy *phy); void wpan_phy_unregister(struct wpan_phy *phy); void wpan_phy_free(struct wpan_phy *phy); /* Same semantics as for class_for_each_device */ int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), void *data); static inline void *wpan_phy_priv(struct wpan_phy *phy) { BUG_ON(!phy); return &phy->priv; } struct wpan_phy *wpan_phy_find(const char *str); static inline void wpan_phy_put(struct wpan_phy *phy) { put_device(&phy->dev); } static inline const char *wpan_phy_name(struct wpan_phy *phy) { return dev_name(&phy->dev); } void ieee802154_configure_durations(struct wpan_phy *phy, unsigned int page, unsigned int channel); /** * cfg802154_device_is_associated - Checks whether we are associated to any device * @wpan_dev: the wpan device * @return: true if we are associated */ bool cfg802154_device_is_associated(struct wpan_dev *wpan_dev); /** * cfg802154_device_is_parent - Checks if a device is our coordinator * @wpan_dev: the wpan device * @target: the expected parent * @return: true if @target is our coordinator */ bool cfg802154_device_is_parent(struct wpan_dev *wpan_dev, struct ieee802154_addr *target); /** * cfg802154_device_is_child - Checks whether a device is associated to us * @wpan_dev: the wpan device * @target: the expected child * @return: the PAN device */ struct ieee802154_pan_device * cfg802154_device_is_child(struct wpan_dev *wpan_dev, struct ieee802154_addr *target); /** * cfg802154_set_max_associations - Limit the number of future associations * @wpan_dev: the wpan device * @max: the maximum number of devices we accept to associate * @return: the old maximum value */ unsigned int cfg802154_set_max_associations(struct wpan_dev *wpan_dev, unsigned int max); /** * cfg802154_get_free_short_addr - Get a free address among the known devices * @wpan_dev: the wpan device * @return: a random short address expectedly unused on our PAN */ __le16 cfg802154_get_free_short_addr(struct wpan_dev *wpan_dev); #endif /* __NET_CFG802154_H */