1 files changed, 187 insertions, 61 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index b397e4d984c7..5617a1613c91 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -158,13 +158,17 @@ struct ieee80211_low_level_stats {
  *      also implies a change in the AID.
  * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed
  * @BSS_CHANGED_ERP_PREAMBLE: preamble changed
+ * @BSS_CHANGED_ERP_SLOT: slot timing changed
  * @BSS_CHANGED_HT: 802.11n parameters changed
+ * @BSS_CHANGED_BASIC_RATES: Basic rateset changed
  */
 enum ieee80211_bss_change {
         BSS_CHANGED_ASSOC               = 1<<0,
         BSS_CHANGED_ERP_CTS_PROT        = 1<<1,
         BSS_CHANGED_ERP_PREAMBLE        = 1<<2,
+        BSS_CHANGED_ERP_SLOT            = 1<<3,
         BSS_CHANGED_HT                  = 1<<4,
+        BSS_CHANGED_BASIC_RATES         = 1<<5,
 };
 
 /**
@@ -177,6 +181,7 @@ enum ieee80211_bss_change {
  * @aid: association ID number, valid only when @assoc is true
  * @use_cts_prot: use CTS protection
  * @use_short_preamble: use 802.11b short preamble
+ * @use_short_slot: use short slot time (only relevant for ERP)
  * @dtim_period: num of beacons before the next DTIM, for PSM
  * @timestamp: beacon timestamp
  * @beacon_int: beacon interval
@@ -184,6 +189,9 @@ enum ieee80211_bss_change {
  * @assoc_ht: association in HT mode
  * @ht_conf: ht capabilities
  * @ht_bss_conf: ht extended capabilities
+ * @basic_rates: bitmap of basic rates, each bit stands for an
+ *      index into the rate table configured by the driver in
+ *      the current band.
  */
 struct ieee80211_bss_conf {
         /* association related data */
@@ -192,10 +200,12 @@ struct ieee80211_bss_conf {
         /* erp related data */
         bool use_cts_prot;
         bool use_short_preamble;
+        bool use_short_slot;
         u8 dtim_period;
         u16 beacon_int;
         u16 assoc_capability;
         u64 timestamp;
+        u64 basic_rates;
         /* ht related data */
         bool assoc_ht;
         struct ieee80211_ht_info *ht_conf;
@@ -282,6 +292,20 @@ enum mac80211_tx_control_flags {
 #define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \
         (IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *))
 
+/* maximum number of alternate rate retry stages */
+#define IEEE80211_TX_MAX_ALTRATE        3
+
+/**
+ * struct ieee80211_tx_altrate - alternate rate selection/status
+ *
+ * @rate_idx: rate index to attempt to send with
+ * @limit: number of retries before fallback
+ */
+struct ieee80211_tx_altrate {
+        s8 rate_idx;
+        u8 limit;
+};
+
 /**
  * struct ieee80211_tx_info - skb transmit information
  *
@@ -290,6 +314,9 @@ enum mac80211_tx_control_flags {
  *  (2) driver internal use (if applicable)
  *  (3) TX status information - driver tells mac80211 what happened
  *
+ * The TX control's sta pointer is only valid during the ->tx call,
+ * it may be NULL.
+ *
  * @flags: transmit info flags, defined above
  * @band: TBD
  * @tx_rate_idx: TBD
@@ -317,18 +344,19 @@ struct ieee80211_tx_info {
 
         union {
                 struct {
+                        /* NB: vif can be NULL for injected frames */
                         struct ieee80211_vif *vif;
                         struct ieee80211_key_conf *hw_key;
+                        struct ieee80211_sta *sta;
                         unsigned long jiffies;
-                        u16 aid;
-                        s8 rts_cts_rate_idx, alt_retry_rate_idx;
+                        s8 rts_cts_rate_idx;
                         u8 retry_limit;
-                        u8 icv_len;
-                        u8 iv_len;
+                        struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE];
                 } control;
                 struct {
                         u64 ampdu_ack_map;
                         int ack_signal;
+                        struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE + 1];
                         u8 retry_count;
                         bool excessive_retries;
                         u8 ampdu_ack_len;
@@ -363,6 +391,7 @@ static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb)
  * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field)
  *      is valid. This is useful in monitor mode and necessary for beacon frames
  *      to enable IBSS merging.
+ * @RX_FLAG_SHORTPRE: Short preamble was used for this frame
  */
 enum mac80211_rx_flags {
         RX_FLAG_MMIC_ERROR      = 1<<0,
@@ -373,6 +402,7 @@ enum mac80211_rx_flags {
         RX_FLAG_FAILED_FCS_CRC  = 1<<5,
         RX_FLAG_FAILED_PLCP_CRC = 1<<6,
         RX_FLAG_TSFT            = 1<<7,
+        RX_FLAG_SHORTPRE        = 1<<8
 };
 
 /**
@@ -418,6 +448,11 @@ struct ieee80211_rx_status {
  * @IEEE80211_CONF_PS: Enable 802.11 power save mode
  */
 enum ieee80211_conf_flags {
+        /*
+         * TODO: IEEE80211_CONF_SHORT_SLOT_TIME will be removed once drivers
+         * have been converted to use bss_info_changed() for slot time
+         * configuration
+         */
         IEEE80211_CONF_SHORT_SLOT_TIME  = (1<<0),
         IEEE80211_CONF_RADIOTAP         = (1<<1),
         IEEE80211_CONF_SUPPORT_HT_MODE  = (1<<2),
@@ -461,33 +496,6 @@ struct ieee80211_conf {
 };
 
 /**
- * enum ieee80211_if_types - types of 802.11 network interfaces
- *
- * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used
- *      by mac80211 itself
- * @IEEE80211_IF_TYPE_AP: interface in AP mode.
- * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap
- *      daemon. Drivers should never see this type.
- * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode.
- * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode.
- * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode.
- * @IEEE80211_IF_TYPE_WDS: interface in WDS mode.
- * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers
- *      will never see this type.
- * @IEEE80211_IF_TYPE_MESH_POINT: 802.11s mesh point
- */
-enum ieee80211_if_types {
-        IEEE80211_IF_TYPE_INVALID,
-        IEEE80211_IF_TYPE_AP,
-        IEEE80211_IF_TYPE_STA,
-        IEEE80211_IF_TYPE_IBSS,
-        IEEE80211_IF_TYPE_MESH_POINT,
-        IEEE80211_IF_TYPE_MNTR,
-        IEEE80211_IF_TYPE_WDS,
-        IEEE80211_IF_TYPE_VLAN,
-};
-
-/**
  * struct ieee80211_vif - per-interface data
  *
  * Data in this structure is continually present for driver
@@ -498,7 +506,7 @@ enum ieee80211_if_types {
  *      sizeof(void *).
  */
 struct ieee80211_vif {
-        enum ieee80211_if_types type;
+        enum nl80211_iftype type;
         /* must be last */
         u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
 };
@@ -506,7 +514,7 @@ struct ieee80211_vif {
 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
 {
 #ifdef CONFIG_MAC80211_MESH
-        return vif->type == IEEE80211_IF_TYPE_MESH_POINT;
+        return vif->type == NL80211_IFTYPE_MESH_POINT;
 #endif
         return false;
 }
@@ -517,7 +525,7 @@ static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
  * @vif: pointer to a driver-use per-interface structure. The pointer
  *      itself is also used for various functions including
  *      ieee80211_beacon_get() and ieee80211_get_buffered_bc().
- * @type: one of &enum ieee80211_if_types constants. Determines the type of
+ * @type: one of &enum nl80211_iftype constants. Determines the type of
  *      added/removed interface.
  * @mac_addr: pointer to MAC address of the interface. This pointer is valid
  *      until the interface is removed (i.e. it cannot be used after
@@ -533,7 +541,7 @@ static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
  * in pure monitor mode.
  */
 struct ieee80211_if_init_conf {
-        enum ieee80211_if_types type;
+        enum nl80211_iftype type;
         struct ieee80211_vif *vif;
         void *mac_addr;
 };
@@ -641,6 +649,8 @@ enum ieee80211_key_flags {
  */
 struct ieee80211_key_conf {
         enum ieee80211_key_alg alg;
+        u8 icv_len;
+        u8 iv_len;
         u8 hw_key_idx;
         u8 flags;
         s8 keyidx;
@@ -662,6 +672,33 @@ enum set_key_cmd {
 };
 
 /**
+ * struct ieee80211_sta - station table entry
+ *
+ * A station table entry represents a station we are possibly
+ * communicating with. Since stations are RCU-managed in
+ * mac80211, any ieee80211_sta pointer you get access to must
+ * either be protected by rcu_read_lock() explicitly or implicitly,
+ * or you must take good care to not use such a pointer after a
+ * call to your sta_notify callback that removed it.
+ *
+ * @addr: MAC address
+ * @aid: AID we assigned to the station if we're an AP
+ * @supp_rates: Bitmap of supported rates (per band)
+ * @ht_info: HT capabilities of this STA
+ * @drv_priv: data area for driver use, will always be aligned to
+ *      sizeof(void *), size is determined in hw information.
+ */
+struct ieee80211_sta {
+        u64 supp_rates[IEEE80211_NUM_BANDS];
+        u8 addr[ETH_ALEN];
+        u16 aid;
+        struct ieee80211_ht_info ht_info;
+
+        /* must be last */
+        u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
+};
+
+/**
  * enum sta_notify_cmd - sta notify command
  *
  * Used with the sta_notify() callback in &struct ieee80211_ops, this
@@ -708,10 +745,7 @@ enum ieee80211_tkip_key_type {
  *      rely on the host system for such buffering. This option is used
  *      to configure the IEEE 802.11 upper layer to buffer broadcast and
  *      multicast frames when there are power saving stations so that
- *      the driver can fetch them with ieee80211_get_buffered_bc(). Note
- *      that not setting this flag works properly only when the
- *      %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is also not set because
- *      otherwise the stack will not know when the DTIM beacon was sent.
+ *      the driver can fetch them with ieee80211_get_buffered_bc().
  *
  * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE:
  *      Hardware is not capable of short slot operation on the 2.4 GHz band.
@@ -808,6 +842,11 @@ enum ieee80211_hw_flags {
  *
  * @vif_data_size: size (in bytes) of the drv_priv data area
  *      within &struct ieee80211_vif.
+ * @sta_data_size: size (in bytes) of the drv_priv data area
+ *      within &struct ieee80211_sta.
+ *
+ * @max_altrates: maximum number of alternate rate retry stages
+ * @max_altrate_tries: maximum number of tries for each stage
  */
 struct ieee80211_hw {
         struct ieee80211_conf conf;
@@ -819,12 +858,17 @@ struct ieee80211_hw {
         unsigned int extra_tx_headroom;
         int channel_change_time;
         int vif_data_size;
+        int sta_data_size;
         u16 queues;
         u16 ampdu_queues;
         u16 max_listen_interval;
         s8 max_signal;
+        u8 max_altrates;
+        u8 max_altrate_tries;
 };
 
+struct ieee80211_hw *wiphy_to_hw(struct wiphy *wiphy);
+
 /**
  * SET_IEEE80211_DEV - set device for 802.11 hardware
  *
@@ -877,11 +921,11 @@ ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw,
 
 static inline struct ieee80211_rate *
 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
-                             const struct ieee80211_tx_info *c)
+                             const struct ieee80211_tx_info *c, int idx)
 {
-        if (c->control.alt_retry_rate_idx < 0)
+        if (c->control.retries[idx].rate_idx < 0)
                 return NULL;
-        return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx];
+        return &hw->wiphy->bands[c->band]->bitrates[c->control.retries[idx].rate_idx];
 }
 
 /**
@@ -1099,10 +1143,8 @@ enum ieee80211_ampdu_mlme_action {
  *      See the section "Frame filtering" for more information.
  *      This callback must be implemented and atomic.
  *
- * @set_tim: Set TIM bit. If the hardware/firmware takes care of beacon
- *      generation (that is, %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is set)
- *      mac80211 calls this function when a TIM bit must be set or cleared
- *      for a given AID. Must be atomic.
+ * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit
+ *      must be set or cleared for a given STA. Must be atomic.
  *
  * @set_key: See the section "Hardware crypto acceleration"
  *      This callback can sleep, and is only called between add_interface
@@ -1116,7 +1158,9 @@ enum ieee80211_ampdu_mlme_action {
  * @hw_scan: Ask the hardware to service the scan request, no need to start
  *      the scan state machine in stack. The scan must honour the channel
  *      configuration done by the regulatory agent in the wiphy's registered
- *      bands.
+ *      bands. When the scan finishes, ieee80211_scan_completed() must be
+ *      called; note that it also must be called when the scan cannot finish
+ *      because the hardware is turned off! Anything else is a bug!
  *
  * @get_stats: return low-level statistics
  *
@@ -1136,7 +1180,7 @@ enum ieee80211_ampdu_mlme_action {
  *      of assocaited station or AP.
  *
  * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
- *      bursting) for a hardware TX queue. Must be atomic.
+ *      bursting) for a hardware TX queue.
  *
  * @get_tx_stats: Get statistics of the current TX queue status. This is used
  *      to get number of currently queued packets (queue length), maximum queue
@@ -1186,7 +1230,8 @@ struct ieee80211_ops {
                                  unsigned int changed_flags,
                                  unsigned int *total_flags,
                                  int mc_count, struct dev_addr_list *mc_list);
-        int (*set_tim)(struct ieee80211_hw *hw, int aid, int set);
+        int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
+                       bool set);
         int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd,
                        const u8 *local_address, const u8 *address,
                        struct ieee80211_key_conf *key);
@@ -1203,7 +1248,7 @@ struct ieee80211_ops {
         int (*set_retry_limit)(struct ieee80211_hw *hw,
                                u32 short_retry, u32 long_retr);
         void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
-                        enum sta_notify_cmd, const u8 *addr);
+                        enum sta_notify_cmd, struct ieee80211_sta *sta);
         int (*conf_tx)(struct ieee80211_hw *hw, u16 queue,
                        const struct ieee80211_tx_queue_params *params);
         int (*get_tx_stats)(struct ieee80211_hw *hw,
@@ -1213,7 +1258,7 @@ struct ieee80211_ops {
         int (*tx_last_beacon)(struct ieee80211_hw *hw);
         int (*ampdu_action)(struct ieee80211_hw *hw,
                             enum ieee80211_ampdu_mlme_action action,
-                            const u8 *addr, u16 tid, u16 *ssn);
+                            struct ieee80211_sta *sta, u16 tid, u16 *ssn);
 };
 
 /**
@@ -1562,16 +1607,6 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
 unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);
 
 /**
- * ieee80211_get_hdrlen - get header length from frame control
- *
- * This function returns the 802.11 header length in bytes (not including
- * encryption headers.)
- *
- * @fc: the frame control field (in CPU endianness)
- */
-int ieee80211_get_hdrlen(u16 fc);
-
-/**
  * ieee80211_hdrlen - get header length in bytes from frame control
  * @fc: frame control field in little-endian format
  */
@@ -1613,6 +1648,16 @@ void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue);
 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue);
 
 /**
+ * ieee80211_queue_stopped - test status of the queue
+ * @hw: pointer as obtained from ieee80211_alloc_hw().
+ * @queue: queue number (counted from zero).
+ *
+ * Drivers should use this function instead of netif_stop_queue.
+ */
+
+int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue);
+
+/**
  * ieee80211_stop_queues - stop all queues
  * @hw: pointer as obtained from ieee80211_alloc_hw().
  *
@@ -1763,4 +1808,85 @@ void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra,
  */
 void ieee80211_notify_mac(struct ieee80211_hw *hw,
                           enum ieee80211_notification_types  notif_type);
+
+/**
+ * ieee80211_find_sta - find a station
+ *
+ * @hw: pointer as obtained from ieee80211_alloc_hw()
+ * @addr: station's address
+ *
+ * This function must be called under RCU lock and the
+ * resulting pointer is only valid under RCU lock as well.
+ */
+struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw,
+                                         const u8 *addr);
+
+
+/* Rate control API */
+/**
+ * struct rate_selection - rate information for/from rate control algorithms
+ *
+ * @rate_idx: selected transmission rate index
+ * @nonerp_idx: Non-ERP rate to use instead if ERP cannot be used
+ * @probe_idx: rate for probing (or -1)
+ * @max_rate_idx: maximum rate index that can be used, this is
+ *      input to the algorithm and will be enforced
+ */
+struct rate_selection {
+        s8 rate_idx, nonerp_idx, probe_idx, max_rate_idx;
+};
+
+struct rate_control_ops {
+        struct module *module;
+        const char *name;
+        void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir);
+        void (*clear)(void *priv);
+        void (*free)(void *priv);
+
+        void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp);
+        void (*rate_init)(void *priv, struct ieee80211_supported_band *sband,
+                          struct ieee80211_sta *sta, void *priv_sta);
+        void (*free_sta)(void *priv, struct ieee80211_sta *sta,
+                         void *priv_sta);
+
+        void (*tx_status)(void *priv, struct ieee80211_supported_band *sband,
+                          struct ieee80211_sta *sta, void *priv_sta,
+                          struct sk_buff *skb);
+        void (*get_rate)(void *priv, struct ieee80211_supported_band *sband,
+                         struct ieee80211_sta *sta, void *priv_sta,
+                         struct sk_buff *skb,
+                         struct rate_selection *sel);
+
+        void (*add_sta_debugfs)(void *priv, void *priv_sta,
+                                struct dentry *dir);
+        void (*remove_sta_debugfs)(void *priv, void *priv_sta);
+};
+
+static inline int rate_supported(struct ieee80211_sta *sta,
+                                 enum ieee80211_band band,
+                                 int index)
+{
+        return (sta == NULL || sta->supp_rates[band] & BIT(index));
+}
+
+static inline s8
+rate_lowest_index(struct ieee80211_supported_band *sband,
+                  struct ieee80211_sta *sta)
+{
+        int i;
+
+        for (i = 0; i < sband->n_bitrates; i++)
+                if (rate_supported(sta, sband->band, i))
+                        return i;
+
+        /* warn when we cannot find a rate. */
+        WARN_ON(1);
+
+        return 0;
+}
+
+
+int ieee80211_rate_control_register(struct rate_control_ops *ops);
+void ieee80211_rate_control_unregister(struct rate_control_ops *ops);
+
 #endif /* MAC80211_H */