*
*/
+/**
+ * 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;
/**
#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
*
* 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
* 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;
u8 cab_queue;
u8 hw_queue[IEEE80211_NUM_ACS];
+ struct ieee80211_txq *txq;
+
struct ieee80211_chanctx_conf __rcu *chanctx_conf;
u32 driver_flags;
*/
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
*
* @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
* @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];
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 *));
struct ieee80211_sta *sta;
};
+/**
+ * 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
*
* 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.
* @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;
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;
u8 uapsd_max_sp_len;
u8 n_cipher_schemes;
const struct ieee80211_cipher_scheme *cipher_schemes;
+ int txq_ac_max_pending;
};
/**
* @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
* 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,
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,
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);
};
/**
* 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
*
* @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
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 */
projects / karo-tx-linux.git / blobdiff