diff options
Diffstat (limited to 'include/net/mac80211.h')
| -rw-r--r-- | include/net/mac80211.h | 253 |
1 files changed, 212 insertions, 41 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index d52914b75331..8e3668b44c29 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -84,6 +84,39 @@ * */ +/** + * DOC: mac80211 software tx queueing + * + * mac80211 provides an optional intermediate queueing implementation designed + * to allow the driver to keep hardware queues short and provide some fairness + * between different stations/interfaces. + * In this model, the driver pulls data frames from the mac80211 queue instead + * of letting mac80211 push them via drv_tx(). + * Other frames (e.g. control or management) are still pushed using drv_tx(). + * + * Drivers indicate that they use this model by implementing the .wake_tx_queue + * driver operation. + * + * Intermediate queues (struct ieee80211_txq) are kept per-sta per-tid, with a + * single per-vif queue for multicast data frames. + * + * The driver is expected to initialize its private per-queue data for stations + * and interfaces in the .add_interface and .sta_add ops. + * + * The driver can't access the queue directly. To dequeue a frame, it calls + * ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a queue, it + * calls the .wake_tx_queue driver op. + * + * For AP powersave TIM handling, the driver only needs to indicate if it has + * buffered packets in the driver specific data structures by calling + * ieee80211_sta_set_buffered(). For frames buffered in the ieee80211_txq + * struct, mac80211 sets the appropriate TIM PVB bits and calls + * .release_buffered_frames(). + * In that callback the driver is therefore expected to release its own + * buffered frames and afterwards also frames from the ieee80211_txq (obtained + * via the usual ieee80211_tx_dequeue). + */ + struct device; /** @@ -301,17 +334,86 @@ enum ieee80211_bss_change { #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 /** - * enum ieee80211_rssi_event - RSSI threshold event - * An indicator for when RSSI goes below/above a certain threshold. - * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. - * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. + * enum ieee80211_event_type - event to be notified to the low level driver + * @RSSI_EVENT: AP's rssi crossed the a threshold set by the driver. + * @MLME_EVENT: event related to MLME */ -enum ieee80211_rssi_event { +enum ieee80211_event_type { + RSSI_EVENT, + MLME_EVENT, +}; + +/** + * enum ieee80211_rssi_event_data - relevant when event type is %RSSI_EVENT + * @RSSI_EVENT_HIGH: AP's rssi went below the threshold set by the driver. + * @RSSI_EVENT_LOW: AP's rssi went above the threshold set by the driver. + */ +enum ieee80211_rssi_event_data { RSSI_EVENT_HIGH, RSSI_EVENT_LOW, }; /** + * enum ieee80211_rssi_event - data attached to an %RSSI_EVENT + * @data: See &enum ieee80211_rssi_event_data + */ +struct ieee80211_rssi_event { + enum ieee80211_rssi_event_data data; +}; + +/** + * enum ieee80211_mlme_event_data - relevant when event type is %MLME_EVENT + * @AUTH_EVENT: the MLME operation is authentication + * @ASSOC_EVENT: the MLME operation is association + * @DEAUTH_RX_EVENT: deauth received.. + * @DEAUTH_TX_EVENT: deauth sent. + */ +enum ieee80211_mlme_event_data { + AUTH_EVENT, + ASSOC_EVENT, + DEAUTH_RX_EVENT, + DEAUTH_TX_EVENT, +}; + +/** + * enum ieee80211_mlme_event_status - relevant when event type is %MLME_EVENT + * @MLME_SUCCESS: the MLME operation completed successfully. + * @MLME_DENIED: the MLME operation was denied by the peer. + * @MLME_TIMEOUT: the MLME operation timed out. + */ +enum ieee80211_mlme_event_status { + MLME_SUCCESS, + MLME_DENIED, + MLME_TIMEOUT, +}; + +/** + * enum ieee80211_mlme_event - data attached to an %MLME_EVENT + * @data: See &enum ieee80211_mlme_event_data + * @status: See &enum ieee80211_mlme_event_status + * @reason: the reason code if applicable + */ +struct ieee80211_mlme_event { + enum ieee80211_mlme_event_data data; + enum ieee80211_mlme_event_status status; + u16 reason; +}; + +/** + * struct ieee80211_event - event to be sent to the driver + * @type The event itself. See &enum ieee80211_event_type. + * @rssi: relevant if &type is %RSSI_EVENT + * @mlme: relevant if &type is %AUTH_EVENT + */ +struct ieee80211_event { + enum ieee80211_event_type type; + union { + struct ieee80211_rssi_event rssi; + struct ieee80211_mlme_event mlme; + } u; +}; + +/** * struct ieee80211_bss_conf - holds the BSS's changing parameters * * This structure keeps information about a BSS (and an association @@ -337,12 +439,15 @@ enum ieee80211_rssi_event { * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can * only come from a beacon, but might not become valid until after * association when a beacon is received (which is notified with the - * %BSS_CHANGED_DTIM flag.) + * %BSS_CHANGED_DTIM flag.). See also sync_dtim_count important notice. * @sync_device_ts: the device timestamp corresponding to the sync_tsf, * the driver/device can use this to calculate synchronisation - * (see @sync_tsf) + * (see @sync_tsf). See also sync_dtim_count important notice. * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY * is requested, see @sync_tsf/@sync_device_ts. + * IMPORTANT: These three sync_* parameters would possibly be out of sync + * by the time the driver will use them. The synchronized view is currently + * guaranteed only in certain callbacks. * @beacon_int: beacon interval * @assoc_capability: capabilities taken from assoc resp * @basic_rates: bitmap of basic rates, each bit stands for an @@ -1234,6 +1339,7 @@ enum ieee80211_vif_flags { * monitor interface (if that is requested.) * @drv_priv: data area for driver use, will always be aligned to * sizeof(void *). + * @txq: the multicast data TX queue (if driver uses the TXQ abstraction) */ struct ieee80211_vif { enum nl80211_iftype type; @@ -1245,6 +1351,8 @@ struct ieee80211_vif { u8 cab_queue; u8 hw_queue[IEEE80211_NUM_ACS]; + struct ieee80211_txq *txq; + struct ieee80211_chanctx_conf __rcu *chanctx_conf; u32 driver_flags; @@ -1279,6 +1387,19 @@ static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); /** + * ieee80211_vif_to_wdev - return a wdev struct from a vif + * @vif: the vif to get the wdev for + * + * This can be used by mac80211 drivers with direct cfg80211 APIs + * (like the vendor commands) that needs to get the wdev for a vif. + * + * Note that this function may return %NULL if the given wdev isn't + * associated with a vif that the driver knows about (e.g. monitor + * or AP_VLAN interfaces.) + */ +struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif); + +/** * enum ieee80211_key_flags - key flags * * These flags are used for communication about keys between the driver @@ -1472,7 +1593,8 @@ struct ieee80211_sta_rates { * @supp_rates: Bitmap of supported rates (per band) * @ht_cap: HT capabilities of this STA; restricted to our own capabilities * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities - * @wme: indicates whether the STA supports QoS/WME. + * @wme: indicates whether the STA supports QoS/WME (if local devices does, + * otherwise always false) * @drv_priv: data area for driver use, will always be aligned to * sizeof(void *), size is determined in hw information. * @uapsd_queues: bitmap of queues configured for uapsd. Only valid @@ -1488,6 +1610,8 @@ struct ieee80211_sta_rates { * @tdls: indicates whether the STA is a TDLS peer * @tdls_initiator: indicates the STA is an initiator of the TDLS link. Only * valid if the STA is a TDLS peer in the first place. + * @mfp: indicates whether the STA uses management frame protection or not. + * @txq: per-TID data TX queues (if driver uses the TXQ abstraction) */ struct ieee80211_sta { u32 supp_rates[IEEE80211_NUM_BANDS]; @@ -1504,6 +1628,9 @@ struct ieee80211_sta { struct ieee80211_sta_rates __rcu *rates; bool tdls; bool tdls_initiator; + bool mfp; + + struct ieee80211_txq *txq[IEEE80211_NUM_TIDS]; /* must be last */ u8 drv_priv[0] __aligned(sizeof(void *)); @@ -1533,6 +1660,29 @@ struct ieee80211_tx_control { }; /** + * struct ieee80211_txq - Software intermediate tx queue + * + * @vif: &struct ieee80211_vif pointer from the add_interface callback. + * @sta: station table entry, %NULL for per-vif queue + * @tid: the TID for this queue (unused for per-vif queue) + * @ac: the AC for this queue + * @drv_priv: data area for driver use, will always be aligned to + * sizeof(void *). + * + * The driver can obtain packets from this queue by calling + * ieee80211_tx_dequeue(). + */ +struct ieee80211_txq { + struct ieee80211_vif *vif; + struct ieee80211_sta *sta; + u8 tid; + u8 ac; + + /* must be last */ + u8 drv_priv[0] __aligned(sizeof(void *)); +}; + +/** * enum ieee80211_hw_flags - hardware flags * * These flags are used to indicate hardware capabilities to @@ -1756,6 +1906,8 @@ enum ieee80211_hw_flags { * within &struct ieee80211_sta. * @chanctx_data_size: size (in bytes) of the drv_priv data area * within &struct ieee80211_chanctx_conf. + * @txq_data_size: size (in bytes) of the drv_priv data area + * within @struct ieee80211_txq. * * @max_rates: maximum number of alternate rate retry stages the hw * can handle. @@ -1804,6 +1956,9 @@ enum ieee80211_hw_flags { * @n_cipher_schemes: a size of an array of cipher schemes definitions. * @cipher_schemes: a pointer to an array of cipher scheme definitions * supported by HW. + * + * @txq_ac_max_pending: maximum number of frames per AC pending in all txq + * entries for a vif. */ struct ieee80211_hw { struct ieee80211_conf conf; @@ -1816,6 +1971,7 @@ struct ieee80211_hw { int vif_data_size; int sta_data_size; int chanctx_data_size; + int txq_data_size; u16 queues; u16 max_listen_interval; s8 max_signal; @@ -1832,6 +1988,7 @@ struct ieee80211_hw { u8 uapsd_max_sp_len; u8 n_cipher_schemes; const struct ieee80211_cipher_scheme *cipher_schemes; + int txq_ac_max_pending; }; /** @@ -2844,8 +3001,9 @@ enum ieee80211_reconfig_type { * @set_bitrate_mask: Set a mask of rates to be used for rate control selection * when transmitting a frame. Currently only legacy rates are handled. * The callback can sleep. - * @rssi_callback: Notify driver when the average RSSI goes above/below - * thresholds that were registered previously. The callback can sleep. + * @event_callback: Notify driver about any event in mac80211. See + * &enum ieee80211_event_type for the different types. + * The callback can sleep. * * @release_buffered_frames: Release buffered frames according to the given * parameters. In the case where the driver buffers some frames for @@ -2993,6 +3151,8 @@ enum ieee80211_reconfig_type { * response template is provided, together with the location of the * switch-timing IE within the template. The skb can only be used within * the function call. + * + * @wake_tx_queue: Called when new packets have been added to the queue. */ struct ieee80211_ops { void (*tx)(struct ieee80211_hw *hw, @@ -3141,9 +3301,9 @@ struct ieee80211_ops { bool (*tx_frames_pending)(struct ieee80211_hw *hw); int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, const struct cfg80211_bitrate_mask *mask); - void (*rssi_callback)(struct ieee80211_hw *hw, - struct ieee80211_vif *vif, - enum ieee80211_rssi_event rssi_event); + void (*event_callback)(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + const struct ieee80211_event *event); void (*allow_buffered_frames)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, @@ -3224,6 +3384,9 @@ struct ieee80211_ops { void (*tdls_recv_channel_switch)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_tdls_ch_sw_params *params); + + void (*wake_tx_queue)(struct ieee80211_hw *hw, + struct ieee80211_txq *txq); }; /** @@ -4343,13 +4506,33 @@ void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); * haven't been re-added to the driver yet. * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all * interfaces, even if they haven't been re-added to the driver yet. + * @IEEE80211_IFACE_ITER_ACTIVE: Iterate only active interfaces (netdev is up). */ enum ieee80211_interface_iteration_flags { IEEE80211_IFACE_ITER_NORMAL = 0, IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), + IEEE80211_IFACE_ITER_ACTIVE = BIT(1), }; /** + * ieee80211_iterate_interfaces - iterate interfaces + * + * This function iterates over the interfaces associated with a given + * hardware and calls the callback for them. This includes active as well as + * inactive interfaces. This function allows the iterator function to sleep. + * Will iterate over a new interface during add_interface(). + * + * @hw: the hardware struct of which the interfaces should be iterated over + * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags + * @iterator: the iterator function to call + * @data: first argument of the iterator function + */ +void ieee80211_iterate_interfaces(struct ieee80211_hw *hw, u32 iter_flags, + void (*iterator)(void *data, u8 *mac, + struct ieee80211_vif *vif), + void *data); + +/** * ieee80211_iterate_active_interfaces - iterate active interfaces * * This function iterates over the interfaces associated with a given @@ -4364,11 +4547,16 @@ enum ieee80211_interface_iteration_flags { * @iterator: the iterator function to call * @data: first argument of the iterator function */ -void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, - u32 iter_flags, - void (*iterator)(void *data, u8 *mac, - struct ieee80211_vif *vif), - void *data); +static inline void +ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, u32 iter_flags, + void (*iterator)(void *data, u8 *mac, + struct ieee80211_vif *vif), + void *data) +{ + ieee80211_iterate_interfaces(hw, + iter_flags | IEEE80211_IFACE_ITER_ACTIVE, + iterator, data); +} /** * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces @@ -5194,30 +5382,13 @@ int ieee80211_reserve_tid(struct ieee80211_sta *sta, u8 tid); void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid); /** - * ieee80211_ie_split - split an IE buffer according to ordering - * - * @ies: the IE buffer - * @ielen: the length of the IE buffer - * @ids: an array with element IDs that are allowed before - * the split - * @n_ids: the size of the element ID array - * @offset: offset where to start splitting in the buffer - * - * This function splits an IE buffer by updating the @offset - * variable to point to the location where the buffer should be - * split. + * ieee80211_tx_dequeue - dequeue a packet from a software tx queue * - * It assumes that the given IE buffer is well-formed, this - * has to be guaranteed by the caller! - * - * It also assumes that the IEs in the buffer are ordered - * correctly, if not the result of using this function will not - * be ordered correctly either, i.e. it does no reordering. + * @hw: pointer as obtained from ieee80211_alloc_hw() + * @txq: pointer obtained from station or virtual interface * - * The function returns the offset where the next part of the - * buffer starts, which may be @ielen if the entire (remainder) - * of the buffer should be used. + * Returns the skb if successful, %NULL if no frame was available. */ -size_t ieee80211_ie_split(const u8 *ies, size_t ielen, - const u8 *ids, int n_ids, size_t offset); +struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, + struct ieee80211_txq *txq); #endif /* MAC80211_H */ |