#include <linux/list.h>
#include <linux/types.h>
#include <linux/if_ether.h>
-#include <linux/kref.h>
#include "ieee80211_key.h"
/**
#define HT_AGG_STATE_OPERATIONAL (HT_ADDBA_REQUESTED_MSK | \
HT_ADDBA_DRV_READY_MSK | \
HT_ADDBA_RECEIVED_MSK)
+#define HT_AGG_STATE_DEBUGFS_CTL BIT(7)
/**
* struct tid_ampdu_tx - TID aggregation information (Tx).
*
- * @state: TID's state in session state machine.
- * @dialog_token: dialog token for aggregation session
- * @ssn: Starting Sequence Number expected to be aggregated.
* @addba_resp_timer: timer for peer's response to addba request
- * @addba_req_num: number of times addBA request has been sent.
+ * @ssn: Starting Sequence Number expected to be aggregated.
+ * @dialog_token: dialog token for aggregation session
*/
struct tid_ampdu_tx {
- u8 state;
- u8 dialog_token;
- u16 ssn;
struct timer_list addba_resp_timer;
- u8 addba_req_num;
+ u16 ssn;
+ u8 dialog_token;
};
/**
* struct tid_ampdu_rx - TID aggregation information (Rx).
*
- * @state: TID's state in session state machine.
- * @dialog_token: dialog token for aggregation session
+ * @reorder_buf: buffer to reorder incoming aggregated MPDUs
+ * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
+ * @head_seq_num: head sequence number in reordering buffer.
+ * @stored_mpdu_num: number of MPDUs in reordering buffer
* @ssn: Starting Sequence Number expected to be aggregated.
* @buf_size: buffer size for incoming A-MPDUs
* @timeout: reset timer value.
- * @head_seq_num: head sequence number in reordering buffer.
- * @stored_mpdu_num: number of MPDUs in reordering buffer
- * @reorder_buf: buffer to reorder incoming aggregated MPDUs
- * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
+ * @dialog_token: dialog token for aggregation session
*/
struct tid_ampdu_rx {
- u8 state;
- u8 dialog_token;
+ struct sk_buff **reorder_buf;
+ struct timer_list session_timer;
+ u16 head_seq_num;
+ u16 stored_mpdu_num;
u16 ssn;
u16 buf_size;
u16 timeout;
- u16 head_seq_num;
- u16 stored_mpdu_num;
- struct sk_buff **reorder_buf;
- struct timer_list session_timer;
+ u8 dialog_token;
};
+/**
+ * enum plink_state - state of a mesh peer link finite state machine
+ *
+ * @PLINK_LISTEN: initial state, considered the implicit state of non existant
+ * mesh peer links
+ * @PLINK_OPN_SNT: mesh plink open frame has been sent to this mesh peer
+ * @PLINK_OPN_RCVD: mesh plink open frame has been received from this mesh peer
+ * @PLINK_CNF_RCVD: mesh plink confirm frame has been received from this mesh
+ * peer
+ * @PLINK_ESTAB: mesh peer link is established
+ * @PLINK_HOLDING: mesh peer link is being closed or cancelled
+ * @PLINK_BLOCKED: all frames transmitted from this mesh plink are discarded
+ */
enum plink_state {
- LISTEN,
- OPN_SNT,
- OPN_RCVD,
- CNF_RCVD,
- ESTAB,
- HOLDING,
- BLOCKED
+ PLINK_LISTEN,
+ PLINK_OPN_SNT,
+ PLINK_OPN_RCVD,
+ PLINK_CNF_RCVD,
+ PLINK_ESTAB,
+ PLINK_HOLDING,
+ PLINK_BLOCKED
};
/**
* struct sta_ampdu_mlme - STA aggregation information.
*
+ * @tid_state_rx: TID's state in Rx session state machine.
* @tid_rx: aggregation info for Rx per TID
- * @tid_tx: aggregation info for Tx per TID
* @ampdu_rx: for locking sections in aggregation Rx flow
+ * @tid_state_tx: TID's state in Tx session state machine.
+ * @tid_tx: aggregation info for Tx per TID
+ * @addba_req_num: number of times addBA request has been sent.
* @ampdu_tx: for locking sectionsi in aggregation Tx flow
* @dialog_token_allocator: dialog token enumerator for each new session;
*/
struct sta_ampdu_mlme {
- struct tid_ampdu_rx tid_rx[STA_TID_NUM];
- struct tid_ampdu_tx tid_tx[STA_TID_NUM];
+ /* rx */
+ u8 tid_state_rx[STA_TID_NUM];
+ struct tid_ampdu_rx *tid_rx[STA_TID_NUM];
spinlock_t ampdu_rx;
+ /* tx */
+ u8 tid_state_tx[STA_TID_NUM];
+ struct tid_ampdu_tx *tid_tx[STA_TID_NUM];
+ u8 addba_req_num[STA_TID_NUM];
spinlock_t ampdu_tx;
u8 dialog_token_allocator;
};
+
+/* see __sta_info_unlink */
+#define STA_INFO_PIN_STAT_NORMAL 0
+#define STA_INFO_PIN_STAT_PINNED 1
+#define STA_INFO_PIN_STAT_DESTROY 2
+
+/**
+ * struct sta_info - STA information
+ *
+ * This structure collects information about a station that
+ * mac80211 is communicating with.
+ *
+ * @list: global linked list entry
+ * @hnext: hash table linked list pointer
+ * @local: pointer to the global information
+ * @addr: MAC address of this STA
+ * @aid: STA's unique AID (1..2007, 0 = not assigned yet),
+ * only used in AP (and IBSS?) mode
+ * @flags: STA flags, see &enum ieee80211_sta_info_flags
+ * @ps_tx_buf: buffer of frames to transmit to this station
+ * when it leaves power saving state
+ * @tx_filtered: buffer of frames we already tried to transmit
+ * but were filtered by hardware due to STA having entered
+ * power saving state
+ * @rx_packets: Number of MSDUs received from this STA
+ * @rx_bytes: Number of bytes received from this STA
+ * @supp_rates: Bitmap of supported rates (per band)
+ * @ht_info: HT capabilities of this STA
+ */
struct sta_info {
- struct kref kref;
+ /* General information, mostly static */
struct list_head list;
- struct sta_info *hnext; /* next entry in hash table list */
-
+ struct sta_info *hnext;
struct ieee80211_local *local;
-
- u8 addr[ETH_ALEN];
- u16 aid; /* STA's unique AID (1..2007), 0 = not yet assigned */
- u32 flags; /* WLAN_STA_ */
-
- struct sk_buff_head ps_tx_buf; /* buffer of TX frames for station in
- * power saving state */
- struct sk_buff_head tx_filtered; /* buffer of TX frames that were
- * already given to low-level driver,
- * but were filtered */
- unsigned long rx_packets, tx_packets; /* number of RX/TX MSDUs */
- unsigned long rx_bytes, tx_bytes;
- unsigned long tx_retry_failed, tx_retry_count;
- unsigned long tx_filtered_count;
- /* moving percentage of failed MSDUs */
- unsigned int fail_avg;
-
- unsigned int wep_weak_iv_count; /* number of RX frames with weak IV */
-
- unsigned long last_rx;
- /* bitmap of supported rates per band */
- u64 supp_rates[IEEE80211_NUM_BANDS];
- int txrate_idx;
- /* last rates used to send a frame to this STA */
- int last_txrate_idx, last_nonerp_txrate_idx;
-
- struct net_device *dev; /* which net device is this station associated
- * to */
-
+ struct ieee80211_sub_if_data *sdata;
struct ieee80211_key *key;
-
- u32 tx_num_consecutive_failures;
- u32 tx_num_mpdu_ok;
- u32 tx_num_mpdu_fail;
-
struct rate_control_ref *rate_ctrl;
void *rate_ctrl_priv;
+ struct ieee80211_ht_info ht_info;
+ u64 supp_rates[IEEE80211_NUM_BANDS];
+ u8 addr[ETH_ALEN];
+ u16 aid;
+ u16 listen_interval;
- /* last received seq/frag number from this STA (per RX queue) */
- __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
+ /*
+ * for use by the internal lifetime management,
+ * see __sta_info_unlink
+ */
+ u8 pin_status;
+
+ /* frequently updated information, needs locking? */
+ u32 flags;
+
+ /*
+ * STA powersave frame queues, no more than the internal
+ * locking required.
+ */
+ struct sk_buff_head ps_tx_buf;
+ struct sk_buff_head tx_filtered;
+
+ /* Updated from RX path only, no locking requirements */
+ unsigned long rx_packets, rx_bytes;
+ unsigned long wep_weak_iv_count;
+ unsigned long last_rx;
unsigned long num_duplicates; /* number of duplicate frames received
* from this STA */
- unsigned long tx_fragments; /* number of transmitted MPDUs */
unsigned long rx_fragments; /* number of received MPDUs */
unsigned long rx_dropped; /* number of dropped MPDUs from this STA */
-
int last_rssi; /* RSSI of last received frame from this STA */
int last_signal; /* signal of last received frame from this STA */
int last_noise; /* noise of last received frame from this STA */
- int channel_use;
- int channel_use_raw;
-
+ /* last received seq/frag number from this STA (per RX queue) */
+ __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
+#endif
+
+ /* Updated from TX status path only, no locking requirements */
+ unsigned long tx_filtered_count;
+ unsigned long tx_retry_failed, tx_retry_count;
+ /* TODO: update in generic code not rate control? */
+ u32 tx_num_consecutive_failures;
+ u32 tx_num_mpdu_ok;
+ u32 tx_num_mpdu_fail;
+ /* moving percentage of failed MSDUs */
+ unsigned int fail_avg;
+
+ /* Updated from TX path only, no locking requirements */
+ unsigned long tx_packets; /* number of RX/TX MSDUs */
+ unsigned long tx_bytes;
+ unsigned long tx_fragments; /* number of transmitted MPDUs */
+ int txrate_idx;
+ int last_txrate_idx;
+#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
-#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
+#endif
- u16 listen_interval;
+ /* Debug counters, no locking doesn't matter */
+ int channel_use;
+ int channel_use_raw;
- struct ieee80211_ht_info ht_info; /* 802.11n HT capabilities
- of this STA */
+ /*
+ * Aggregation information, comes with own locking.
+ */
struct sta_ampdu_mlme ampdu_mlme;
- u8 timer_to_tid[STA_TID_NUM]; /* convert timer id to tid */
+ u8 timer_to_tid[STA_TID_NUM]; /* identity mapping to ID timers */
u8 tid_to_tx_q[STA_TID_NUM]; /* map tid to tx queue */
+
#ifdef CONFIG_MAC80211_MESH
- /* mesh peer link attributes */
+ /*
+ * Mesh peer link attributes
+ * TODO: move to a sub-structure that is referenced with pointer?
+ */
__le16 llid; /* Local link ID */
__le16 plid; /* Peer link ID */
- __le16 reason; /* Buffer for cancel reason on HOLDING state */
+ __le16 reason; /* Cancel reason on PLINK_HOLDING state */
+ u8 plink_retries; /* Retries in establishment */
+ bool ignore_plink_timer;
enum plink_state plink_state;
u32 plink_timeout;
struct timer_list plink_timer;
- u8 plink_retries; /* Retries in establishment */
- bool ignore_plink_timer;
spinlock_t plink_lock; /* For peer_state reads / updates and other
updates in the structure. Ensures robust
transitions for the peerlink FSM */
#ifdef CONFIG_MAC80211_MESH
return sta->plink_state;
#endif
- return LISTEN;
+ return PLINK_LISTEN;
}
*/
#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
-static inline void __sta_info_get(struct sta_info *sta)
-{
- kref_get(&sta->kref);
-}
-
-struct sta_info * sta_info_get(struct ieee80211_local *local, u8 *addr);
+/*
+ * Get a STA info, must have be under RCU read lock.
+ */
+struct sta_info *sta_info_get(struct ieee80211_local *local, u8 *addr);
+/*
+ * Get STA info by index, BROKEN!
+ */
struct sta_info *sta_info_get_by_idx(struct ieee80211_local *local, int idx,
struct net_device *dev);
-void sta_info_put(struct sta_info *sta);
-struct sta_info *sta_info_add(struct ieee80211_local *local,
- struct net_device *dev, u8 *addr, gfp_t gfp);
-void sta_info_remove(struct sta_info *sta);
-void sta_info_free(struct sta_info *sta);
-void sta_info_init(struct ieee80211_local *local);
-int sta_info_start(struct ieee80211_local *local);
-void sta_info_stop(struct ieee80211_local *local);
-void sta_info_flush(struct ieee80211_local *local, struct net_device *dev);
+/*
+ * Create a new STA info, caller owns returned structure
+ * until sta_info_insert().
+ */
+struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
+ u8 *addr, gfp_t gfp);
+/*
+ * Insert STA info into hash table/list, returns zero or a
+ * -EEXIST if (if the same MAC address is already present).
+ *
+ * Calling this without RCU protection makes the caller
+ * relinquish its reference to @sta.
+ */
+int sta_info_insert(struct sta_info *sta);
+/*
+ * Unlink a STA info from the hash table/list.
+ * This can NULL the STA pointer if somebody else
+ * has already unlinked it.
+ */
+void sta_info_unlink(struct sta_info **sta);
+void __sta_info_unlink(struct sta_info **sta);
+void sta_info_destroy(struct sta_info *sta);
void sta_info_set_tim_bit(struct sta_info *sta);
void sta_info_clear_tim_bit(struct sta_info *sta);
+void sta_info_init(struct ieee80211_local *local);
+int sta_info_start(struct ieee80211_local *local);
+void sta_info_stop(struct ieee80211_local *local);
+int sta_info_flush(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata);
+void sta_info_flush_delayed(struct ieee80211_sub_if_data *sdata);
+void __ieee80211_run_pending_flush(struct ieee80211_local *local);
+
#endif /* STA_INFO_H */
projects / linux-2.6-omap-h63xx.git / blobdiff