1 files changed, 140 insertions, 124 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 3b83a80e3fe0..c06104476973 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -19,7 +19,6 @@
 #include <linux/wireless.h>
 #include <linux/device.h>
 #include <linux/ieee80211.h>
-#include <net/wireless.h>
 #include <net/cfg80211.h>
 
 /**
@@ -74,22 +73,6 @@
  */
 
 /**
- * struct ieee80211_ht_bss_info - describing BSS's HT characteristics
- *
- * This structure describes most essential parameters needed
- * to describe 802.11n HT characteristics in a BSS.
- *
- * @primary_channel: channel number of primery channel
- * @bss_cap: 802.11n's general BSS capabilities (e.g. channel width)
- * @bss_op_mode: 802.11n's BSS operation modes (e.g. HT protection)
- */
-struct ieee80211_ht_bss_info {
-        u8 primary_channel;
-        u8 bss_cap;  /* use IEEE80211_HT_IE_CHA_ */
-        u8 bss_op_mode; /* use IEEE80211_HT_IE_ */
-};
-
-/**
  * enum ieee80211_max_queues - maximum number of queues
  *
  * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
@@ -150,6 +133,13 @@ struct ieee80211_low_level_stats {
  * @BSS_CHANGED_ERP_SLOT: slot timing changed
  * @BSS_CHANGED_HT: 802.11n parameters changed
  * @BSS_CHANGED_BASIC_RATES: Basic rateset changed
+ * @BSS_CHANGED_BEACON_INT: Beacon interval changed
+ * @BSS_CHANGED_BSSID: BSSID changed, for whatever
+ *      reason (IBSS and managed mode)
+ * @BSS_CHANGED_BEACON: Beacon data changed, retrieve
+ *      new beacon (beaconing modes)
+ * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be
+ *      enabled/disabled (beaconing modes)
  */
 enum ieee80211_bss_change {
         BSS_CHANGED_ASSOC               = 1<<0,
@@ -158,14 +148,10 @@ enum ieee80211_bss_change {
         BSS_CHANGED_ERP_SLOT            = 1<<3,
         BSS_CHANGED_HT                  = 1<<4,
         BSS_CHANGED_BASIC_RATES         = 1<<5,
-};
-
-/**
- * struct ieee80211_bss_ht_conf - BSS's changing HT configuration
- * @operation_mode: HT operation mode (like in &struct ieee80211_ht_info)
- */
-struct ieee80211_bss_ht_conf {
-        u16 operation_mode;
+        BSS_CHANGED_BEACON_INT          = 1<<6,
+        BSS_CHANGED_BSSID               = 1<<7,
+        BSS_CHANGED_BEACON              = 1<<8,
+        BSS_CHANGED_BEACON_ENABLED      = 1<<9,
 };
 
 /**
@@ -187,12 +173,16 @@ struct ieee80211_bss_ht_conf {
  * @timestamp: beacon timestamp
  * @beacon_int: beacon interval
  * @assoc_capability: capabilities taken from assoc resp
- * @ht: BSS's HT configuration
  * @basic_rates: bitmap of basic rates, each bit stands for an
  *      index into the rate table configured by the driver in
  *      the current band.
+ * @bssid: The BSSID for this BSS
+ * @enable_beacon: whether beaconing should be enabled or not
+ * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info).
+ *      This field is only valid when the channel type is one of the HT types.
  */
 struct ieee80211_bss_conf {
+        const u8 *bssid;
         /* association related data */
         bool assoc;
         u16 aid;
@@ -200,12 +190,13 @@ struct ieee80211_bss_conf {
         bool use_cts_prot;
         bool use_short_preamble;
         bool use_short_slot;
+        bool enable_beacon;
         u8 dtim_period;
         u16 beacon_int;
         u16 assoc_capability;
         u64 timestamp;
         u32 basic_rates;
-        struct ieee80211_bss_ht_conf ht;
+        u16 ht_operation_mode;
 };
 
 /**
@@ -248,6 +239,8 @@ struct ieee80211_bss_conf {
  * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211,
  *      used to indicate that a pending frame requires TX processing before
  *      it can be sent out.
+ * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211,
+ *      used to indicate that a frame was already retried due to PS
  */
 enum mac80211_tx_control_flags {
         IEEE80211_TX_CTL_REQ_TX_STATUS          = BIT(0),
@@ -265,6 +258,7 @@ enum mac80211_tx_control_flags {
         IEEE80211_TX_CTL_RATE_CTRL_PROBE        = BIT(12),
         IEEE80211_TX_INTFL_RCALGO               = BIT(13),
         IEEE80211_TX_INTFL_NEED_TXPROCESSING    = BIT(14),
+        IEEE80211_TX_INTFL_RETRIED              = BIT(15),
 };
 
 /**
@@ -518,52 +512,76 @@ struct ieee80211_rx_status {
  * Flags to define PHY configuration options
  *
  * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported)
- * @IEEE80211_CONF_PS: Enable 802.11 power save mode
+ * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only)
+ * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set
+ *      the driver should be prepared to handle configuration requests but
+ *      may turn the device off as much as possible. Typically, this flag will
+ *      be set when an interface is set UP but not associated or scanning, but
+ *      it can also be unset in that case when monitor interfaces are active.
  */
 enum ieee80211_conf_flags {
         IEEE80211_CONF_RADIOTAP         = (1<<0),
         IEEE80211_CONF_PS               = (1<<1),
+        IEEE80211_CONF_IDLE             = (1<<2),
 };
 
 
 /**
  * enum ieee80211_conf_changed - denotes which configuration changed
  *
- * @IEEE80211_CONF_CHANGE_RADIO_ENABLED: the value of radio_enabled changed
- * @IEEE80211_CONF_CHANGE_BEACON_INTERVAL: the beacon interval changed
+ * @_IEEE80211_CONF_CHANGE_RADIO_ENABLED: DEPRECATED
  * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed
  * @IEEE80211_CONF_CHANGE_RADIOTAP: the radiotap flag changed
- * @IEEE80211_CONF_CHANGE_PS: the PS flag changed
- * @IEEE80211_CONF_CHANGE_DYNPS_TIMEOUT: the dynamic PS timeout changed
+ * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed
  * @IEEE80211_CONF_CHANGE_POWER: the TX power changed
  * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed
  * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed
+ * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed
  */
 enum ieee80211_conf_changed {
-        IEEE80211_CONF_CHANGE_RADIO_ENABLED     = BIT(0),
-        IEEE80211_CONF_CHANGE_BEACON_INTERVAL   = BIT(1),
+        _IEEE80211_CONF_CHANGE_RADIO_ENABLED    = BIT(0),
         IEEE80211_CONF_CHANGE_LISTEN_INTERVAL   = BIT(2),
         IEEE80211_CONF_CHANGE_RADIOTAP          = BIT(3),
         IEEE80211_CONF_CHANGE_PS                = BIT(4),
-        IEEE80211_CONF_CHANGE_DYNPS_TIMEOUT     = BIT(5),
-        IEEE80211_CONF_CHANGE_POWER             = BIT(6),
-        IEEE80211_CONF_CHANGE_CHANNEL           = BIT(7),
-        IEEE80211_CONF_CHANGE_RETRY_LIMITS      = BIT(8),
+        IEEE80211_CONF_CHANGE_POWER             = BIT(5),
+        IEEE80211_CONF_CHANGE_CHANNEL           = BIT(6),
+        IEEE80211_CONF_CHANGE_RETRY_LIMITS      = BIT(7),
+        IEEE80211_CONF_CHANGE_IDLE              = BIT(8),
 };
 
+static inline __deprecated enum ieee80211_conf_changed
+__IEEE80211_CONF_CHANGE_RADIO_ENABLED(void)
+{
+        return _IEEE80211_CONF_CHANGE_RADIO_ENABLED;
+}
+#define IEEE80211_CONF_CHANGE_RADIO_ENABLED \
+        __IEEE80211_CONF_CHANGE_RADIO_ENABLED()
+
 /**
  * struct ieee80211_conf - configuration of the device
  *
  * This struct indicates how the driver shall configure the hardware.
  *
+ * @flags: configuration flags defined above
+ *
  * @radio_enabled: when zero, driver is required to switch off the radio.
- * @beacon_int: beacon interval (TODO make interface config)
+ * @beacon_int: DEPRECATED, DO NOT USE
+ *
  * @listen_interval: listen interval in units of beacon interval
- * @flags: configuration flags defined above
+ * @max_sleep_period: the maximum number of beacon intervals to sleep for
+ *      before checking the beacon for a TIM bit (managed mode only); this
+ *      value will be only achievable between DTIM frames, the hardware
+ *      needs to check for the multicast traffic bit in DTIM beacons.
+ *      This variable is valid only when the CONF_PS flag is set.
+ * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the
+ *      powersave documentation below. This variable is valid only when
+ *      the CONF_PS flag is set.
+ *
  * @power_level: requested transmit power (in dBm)
- * @dynamic_ps_timeout: dynamic powersave timeout (in ms)
+ *
  * @channel: the channel to tune to
  * @channel_type: the channel (HT) type
+ *
  * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame
  *    (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11,
  *    but actually means the number of transmissions not the number of retries
@@ -572,12 +590,13 @@ enum ieee80211_conf_changed {
  *    number of transmissions not the number of retries
  */
 struct ieee80211_conf {
-        int beacon_int;
+        int __deprecated beacon_int;
         u32 flags;
         int power_level, dynamic_ps_timeout;
+        int max_sleep_period;
 
         u16 listen_interval;
-        bool radio_enabled;
+        bool __deprecated radio_enabled;
 
         u8 long_frame_max_tx_count, short_frame_max_tx_count;
 
@@ -640,37 +659,6 @@ struct ieee80211_if_init_conf {
 };
 
 /**
- * enum ieee80211_if_conf_change - interface config change flags
- *
- * @IEEE80211_IFCC_BSSID: The BSSID changed.
- * @IEEE80211_IFCC_BEACON: The beacon for this interface changed
- *      (currently AP and MESH only), use ieee80211_beacon_get().
- * @IEEE80211_IFCC_BEACON_ENABLED: The enable_beacon value changed.
- */
-enum ieee80211_if_conf_change {
-        IEEE80211_IFCC_BSSID            = BIT(0),
-        IEEE80211_IFCC_BEACON           = BIT(1),
-        IEEE80211_IFCC_BEACON_ENABLED   = BIT(2),
-};
-
-/**
- * struct ieee80211_if_conf - configuration of an interface
- *
- * @changed: parameters that have changed, see &enum ieee80211_if_conf_change.
- * @bssid: BSSID of the network we are associated to/creating.
- * @enable_beacon: Indicates whether beacons can be sent.
- *      This is valid only for AP/IBSS/MESH modes.
- *
- * This structure is passed to the config_interface() callback of
- * &struct ieee80211_hw.
- */
-struct ieee80211_if_conf {
-        u32 changed;
-        const u8 *bssid;
-        bool enable_beacon;
-};
-
-/**
  * enum ieee80211_key_alg - key algorithm
  * @ALG_WEP: WEP40 or WEP104
  * @ALG_TKIP: TKIP
@@ -685,16 +673,6 @@ enum ieee80211_key_alg {
 };
 
 /**
- * enum ieee80211_key_len - key length
- * @LEN_WEP40: WEP 5-byte long key
- * @LEN_WEP104: WEP 13-byte long key
- */
-enum ieee80211_key_len {
-        LEN_WEP40 = 5,
-        LEN_WEP104 = 13,
-};
-
-/**
  * enum ieee80211_key_flags - key flags
  *
  * These flags are used for communication about keys between the driver
@@ -1109,11 +1087,9 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
  * need software support for parsing the TIM bitmap. This is also supported
  * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and
  * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still
- * required to pass up beacons. Additionally, in this case, mac80211 will
- * wake up the hardware when multicast traffic is announced in the beacon.
- *
- * FIXME: I don't think we can be fast enough in software when we want to
- *        receive multicast traffic?
+ * required to pass up beacons. The hardware is still required to handle
+ * waking up for multicast traffic; if it cannot the driver must handle that
+ * as best as it can, mac80211 is too slow.
  *
  * Dynamic powersave mode is an extension to normal powersave mode in which
  * the hardware stays awake for a user-specified period of time after sending
@@ -1134,11 +1110,53 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
  * way the host will only receive beacons where some relevant information
  * (for example ERP protection or WMM settings) have changed.
  *
- * Beacon filter support is informed with %IEEE80211_HW_BEACON_FILTER flag.
- * The driver needs to enable beacon filter support whenever power save is
- * enabled, that is %IEEE80211_CONF_PS is set. When power save is enabled,
- * the stack will not check for beacon miss at all and the driver needs to
- * notify about complete loss of beacons with ieee80211_beacon_loss().
+ * Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER
+ * hardware capability. The driver needs to enable beacon filter support
+ * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When
+ * power save is enabled, the stack will not check for beacon loss and the
+ * driver needs to notify about loss of beacons with ieee80211_beacon_loss().
+ *
+ * The time (or number of beacons missed) until the firmware notifies the
+ * driver of a beacon loss event (which in turn causes the driver to call
+ * ieee80211_beacon_loss()) should be configurable and will be controlled
+ * by mac80211 and the roaming algorithm in the future.
+ *
+ * Since there may be constantly changing information elements that nothing
+ * in the software stack cares about, we will, in the future, have mac80211
+ * tell the driver which information elements are interesting in the sense
+ * that we want to see changes in them. This will include
+ *  - a list of information element IDs
+ *  - a list of OUIs for the vendor information element
+ *
+ * Ideally, the hardware would filter out any beacons without changes in the
+ * requested elements, but if it cannot support that it may, at the expense
+ * of some efficiency, filter out only a subset. For example, if the device
+ * doesn't support checking for OUIs it should pass up all changes in all
+ * vendor information elements.
+ *
+ * Note that change, for the sake of simplification, also includes information
+ * elements appearing or disappearing from the beacon.
+ *
+ * Some hardware supports an "ignore list" instead, just make sure nothing
+ * that was requested is on the ignore list, and include commonly changing
+ * information element IDs in the ignore list, for example 11 (BSS load) and
+ * the various vendor-assigned IEs with unknown contents (128, 129, 133-136,
+ * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility
+ * it could also include some currently unused IDs.
+ *
+ *
+ * In addition to these capabilities, hardware should support notifying the
+ * host of changes in the beacon RSSI. This is relevant to implement roaming
+ * when no traffic is flowing (when traffic is flowing we see the RSSI of
+ * the received data packets). This can consist in notifying the host when
+ * the RSSI changes significantly or when it drops below or rises above
+ * configurable thresholds. In the future these thresholds will also be
+ * configured by mac80211 (which gets them from userspace) to implement
+ * them as the roaming algorithm requires.
+ *
+ * If the hardware cannot implement this, the driver should ask it to
+ * periodically pass beacon frames to the host so that software can do the
+ * signal strength threshold checking.
  */
 
 /**
@@ -1298,10 +1316,6 @@ enum ieee80211_ampdu_mlme_action {
  *      This function should never fail but returns a negative error code
  *      if it does.
  *
- * @config_interface: Handler for configuration requests related to interfaces
- *      (e.g. BSSID changes.)
- *      Returns a negative error code which will be seen in userspace.
- *
  * @bss_info_changed: Handler for configuration requests related to BSS
  *      parameters that may vary during BSS's lifespan, and may affect low
  *      level driver (e.g. assoc/disassoc status, erp parameters).
@@ -1330,11 +1344,14 @@ enum ieee80211_ampdu_mlme_action {
  *      the scan state machine in stack. The scan must honour the channel
  *      configuration done by the regulatory agent in the wiphy's
  *      registered bands. The hardware (or the driver) needs to make sure
- *      that power save is disabled. 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! Returns a negative error code
- *      which will be seen in userspace.
+ *      that power save is disabled.
+ *      The @req ie/ie_len members are rewritten by mac80211 to contain the
+ *      entire IEs after the SSID, so that drivers need not look at these
+ *      at all but just send them after the SSID -- mac80211 includes the
+ *      (extended) supported rates and HT information (where applicable).
+ *      When the scan finishes, ieee80211_scan_completed() must be called;
+ *      note that it also must be called when the scan cannot finish due to
+ *      any error unless this callback returned a negative error code.
  *
  * @sw_scan_start: Notifier function that is called just before a software scan
  *      is started. Can be NULL, if the driver doesn't need this notification.
@@ -1390,6 +1407,10 @@ enum ieee80211_ampdu_mlme_action {
  *      is the first frame we expect to perform the action on. Notice
  *      that TX/RX_STOP can pass NULL for this parameter.
  *      Returns a negative error code on failure.
+ *
+ * @rfkill_poll: Poll rfkill hardware state. If you need this, you also
+ *      need to set wiphy->rfkill_poll to %true before registration,
+ *      and need to call wiphy_rfkill_set_hw_state() in the callback.
  */
 struct ieee80211_ops {
         int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb);
@@ -1400,9 +1421,6 @@ struct ieee80211_ops {
         void (*remove_interface)(struct ieee80211_hw *hw,
                                  struct ieee80211_if_init_conf *conf);
         int (*config)(struct ieee80211_hw *hw, u32 changed);
-        int (*config_interface)(struct ieee80211_hw *hw,
-                                struct ieee80211_vif *vif,
-                                struct ieee80211_if_conf *conf);
         void (*bss_info_changed)(struct ieee80211_hw *hw,
                                  struct ieee80211_vif *vif,
                                  struct ieee80211_bss_conf *info,
@@ -1441,6 +1459,8 @@ struct ieee80211_ops {
         int (*ampdu_action)(struct ieee80211_hw *hw,
                             enum ieee80211_ampdu_mlme_action action,
                             struct ieee80211_sta *sta, u16 tid, u16 *ssn);
+
+        void (*rfkill_poll)(struct ieee80211_hw *hw);
 };
 
 /**
@@ -1572,6 +1592,20 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw);
  */
 void ieee80211_free_hw(struct ieee80211_hw *hw);
 
+/**
+ * ieee80211_restart_hw - restart hardware completely
+ *
+ * Call this function when the hardware was restarted for some reason
+ * (hardware error, ...) and the driver is unable to restore its state
+ * by itself. mac80211 assumes that at this point the driver/hardware
+ * is completely uninitialised and stopped, it starts the process by
+ * calling the ->start() operation. The driver will need to reset all
+ * internal state that it has prior to calling this function.
+ *
+ * @hw: the hardware to restart
+ */
+void ieee80211_restart_hw(struct ieee80211_hw *hw);
+
 /* trick to avoid symbol clashes with the ieee80211 subsystem */
 void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
                     struct ieee80211_rx_status *status);
@@ -1775,24 +1809,6 @@ struct sk_buff *
 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
 
 /**
- * ieee80211_get_hdrlen_from_skb - get header length from data
- *
- * Given an skb with a raw 802.11 header at the data pointer this function
- * returns the 802.11 header length in bytes (not including encryption
- * headers). If the data in the sk_buff is too short to contain a valid 802.11
- * header the function returns 0.
- *
- * @skb: the frame
- */
-unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);
-
-/**
- * ieee80211_hdrlen - get header length in bytes from frame control
- * @fc: frame control field in little-endian format
- */
-unsigned int ieee80211_hdrlen(__le16 fc);
-
-/**
  * ieee80211_get_tkip_key - get a TKIP rc4 for skb
  *
  * This function computes a TKIP rc4 key for an skb. It computes