diff options
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/mac80211.h | 254 |
1 files changed, 156 insertions, 98 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 9801afb62545..3741c0a7978a 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -214,29 +214,24 @@ struct ieee80211_bss_conf { * These flags are used with the @flags member of &ieee80211_tx_info. * * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame. - * @IEEE80211_TX_CTL_USE_RTS_CTS: use RTS-CTS before sending frame - * @IEEE80211_TX_CTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g., - * for combined 802.11g / 802.11b networks) + * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence + * number to this frame, taking care of not overwriting the fragment + * number and increasing the sequence number only when the + * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly + * assign sequence numbers to QoS-data frames but cannot do so correctly + * for non-QoS-data and management frames because beacons need them from + * that counter as well and mac80211 cannot guarantee proper sequencing. + * If this flag is set, the driver should instruct the hardware to + * assign a sequence number to the frame or assign one itself. Cf. IEEE + * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for + * beacons and always be clear for frames without a sequence number field. * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack - * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: TBD * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination * station - * @IEEE80211_TX_CTL_REQUEUE: TBD * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame - * @IEEE80211_TX_CTL_SHORT_PREAMBLE: TBD - * @IEEE80211_TX_CTL_LONG_RETRY_LIMIT: this frame should be send using the - * through set_retry_limit configured long retry value * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU - * @IEEE80211_TX_CTL_OFDM_HT: this frame can be sent in HT OFDM rates. number - * of streams when this flag is on can be extracted from antenna_sel_tx, - * so if 1 antenna is marked use SISO, 2 antennas marked use MIMO, n - * antennas marked use MIMO_n. - * @IEEE80211_TX_CTL_GREEN_FIELD: use green field protection for this frame - * @IEEE80211_TX_CTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width - * @IEEE80211_TX_CTL_DUP_DATA: duplicate data frame on both 20 Mhz channels - * @IEEE80211_TX_CTL_SHORT_GI: send this frame using short guard interval - * @IEEE80211_TX_CTL_INJECTED: TBD + * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted * because the destination STA was in powersave mode. * @IEEE80211_TX_STAT_ACK: Frame was acknowledged @@ -244,62 +239,70 @@ struct ieee80211_bss_conf { * is for the whole aggregation. * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, * so consider using block ack request (BAR). - * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence - * number to this frame, taking care of not overwriting the fragment - * number and increasing the sequence number only when the - * IEEE80211_TX_CTL_FIRST_FRAGMENT flags is set. mac80211 will properly - * assign sequence numbers to QoS-data frames but cannot do so correctly - * for non-QoS-data and management frames because beacons need them from - * that counter as well and mac80211 cannot guarantee proper sequencing. - * If this flag is set, the driver should instruct the hardware to - * assign a sequence number to the frame or assign one itself. Cf. IEEE - * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for - * beacons always be clear for frames without a sequence number field. + * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be + * set by rate control algorithms to indicate probe rate, will + * be cleared for fragmented frames (except on the last fragment) + * @IEEE80211_TX_CTL_REQUEUE: REMOVE THIS */ enum mac80211_tx_control_flags { IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), - IEEE80211_TX_CTL_USE_RTS_CTS = BIT(2), - IEEE80211_TX_CTL_USE_CTS_PROTECT = BIT(3), - IEEE80211_TX_CTL_NO_ACK = BIT(4), - IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(5), - IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(6), - IEEE80211_TX_CTL_REQUEUE = BIT(7), - IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(8), - IEEE80211_TX_CTL_SHORT_PREAMBLE = BIT(9), - IEEE80211_TX_CTL_LONG_RETRY_LIMIT = BIT(10), - IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(12), - IEEE80211_TX_CTL_AMPDU = BIT(13), - IEEE80211_TX_CTL_OFDM_HT = BIT(14), - IEEE80211_TX_CTL_GREEN_FIELD = BIT(15), - IEEE80211_TX_CTL_40_MHZ_WIDTH = BIT(16), - IEEE80211_TX_CTL_DUP_DATA = BIT(17), - IEEE80211_TX_CTL_SHORT_GI = BIT(18), - IEEE80211_TX_CTL_INJECTED = BIT(19), - IEEE80211_TX_STAT_TX_FILTERED = BIT(20), - IEEE80211_TX_STAT_ACK = BIT(21), - IEEE80211_TX_STAT_AMPDU = BIT(22), - IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(23), - IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(24), + IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), + IEEE80211_TX_CTL_NO_ACK = BIT(2), + IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), + IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), + IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), + IEEE80211_TX_CTL_AMPDU = BIT(6), + IEEE80211_TX_CTL_INJECTED = BIT(7), + IEEE80211_TX_STAT_TX_FILTERED = BIT(8), + IEEE80211_TX_STAT_ACK = BIT(9), + IEEE80211_TX_STAT_AMPDU = BIT(10), + IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), + IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), + + /* XXX: remove this */ + IEEE80211_TX_CTL_REQUEUE = BIT(13), }; +enum mac80211_rate_control_flags { + IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), + IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), + IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), + + /* rate index is an MCS rate number instead of an index */ + IEEE80211_TX_RC_MCS = BIT(3), + IEEE80211_TX_RC_GREEN_FIELD = BIT(4), + IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), + IEEE80211_TX_RC_DUP_DATA = BIT(6), + IEEE80211_TX_RC_SHORT_GI = BIT(7), +}; + + +/* there are 40 bytes if you don't need the rateset to be kept */ +#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 -#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE \ - (sizeof(((struct sk_buff *)0)->cb) - 8) -#define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \ - (IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)) +/* if you do need the rateset, then you have less space */ +#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 -/* maximum number of alternate rate retry stages */ -#define IEEE80211_TX_MAX_ALTRATE 3 +/* maximum number of rate stages */ +#define IEEE80211_TX_MAX_RATES 5 /** - * struct ieee80211_tx_altrate - alternate rate selection/status + * struct ieee80211_tx_rate - rate selection/status * - * @rate_idx: rate index to attempt to send with + * @idx: rate index to attempt to send with + * @flags: rate control flags (&enum mac80211_rate_control_flags) * @limit: number of retries before fallback + * + * A value of -1 for @idx indicates an invalid rate and, if used + * in an array of retry rates, that no more rates should be tried. + * + * When used for transmit status reporting, the driver should + * always report the rate along with the flags it used. */ -struct ieee80211_tx_altrate { - s8 rate_idx; - u8 limit; +struct ieee80211_tx_rate { + s8 idx; + u8 count; + u8 flags; }; /** @@ -314,15 +317,12 @@ struct ieee80211_tx_altrate { * it may be NULL. * * @flags: transmit info flags, defined above - * @band: TBD - * @tx_rate_idx: TBD + * @band: the band to transmit on (use for checking for races) * @antenna_sel_tx: antenna to use, 0 for automatic diversity * @control: union for control data * @status: union for status data * @driver_data: array of driver_data pointers * @retry_count: number of retries - * @excessive_retries: set to 1 if the frame was retried many times - * but not acknowledged * @ampdu_ack_len: number of aggregated frames. * relevant only if IEEE80211_TX_STATUS_AMPDU was set. * @ampdu_ack_map: block ack bit map for the aggregation. @@ -333,31 +333,43 @@ struct ieee80211_tx_info { /* common information */ u32 flags; u8 band; - s8 tx_rate_idx; + u8 antenna_sel_tx; - /* 1 byte hole */ + /* 2 byte hole */ union { struct { + union { + /* rate control */ + struct { + struct ieee80211_tx_rate rates[ + IEEE80211_TX_MAX_RATES]; + s8 rts_cts_rate_idx; + }; + /* only needed before rate control */ + unsigned long jiffies; + }; /* 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; - s8 rts_cts_rate_idx; - u8 retry_limit; - struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE]; } control; struct { + struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; + u8 ampdu_ack_len; 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; + /* 8 bytes free */ } status; - void *driver_data[IEEE80211_TX_INFO_DRIVER_DATA_PTRS]; + struct { + struct ieee80211_tx_rate driver_rates[ + IEEE80211_TX_MAX_RATES]; + void *rate_driver_data[ + IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; + }; + void *driver_data[ + IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; }; }; @@ -366,6 +378,41 @@ static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) return (struct ieee80211_tx_info *)skb->cb; } +/** + * ieee80211_tx_info_clear_status - clear TX status + * + * @info: The &struct ieee80211_tx_info to be cleared. + * + * When the driver passes an skb back to mac80211, it must report + * a number of things in TX status. This function clears everything + * in the TX status but the rate control information (it does clear + * the count since you need to fill that in anyway). + * + * NOTE: You can only use this function if you do NOT use + * info->driver_data! Use info->rate_driver_data + * instead if you need only the less space that allows. + */ +static inline void +ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) +{ + int i; + + BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != + offsetof(struct ieee80211_tx_info, control.rates)); + BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != + offsetof(struct ieee80211_tx_info, driver_rates)); + BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); + /* clear the rate counts */ + for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) + info->status.rates[i].count = 0; + + BUILD_BUG_ON( + offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); + memset(&info->status.ampdu_ack_len, 0, + sizeof(struct ieee80211_tx_info) - + offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); +} + /** * enum mac80211_rx_flags - receive flags @@ -869,8 +916,8 @@ enum ieee80211_hw_flags { * @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 + * @max_rates: maximum number of alternate rate retry stages + * @max_rate_tries: maximum number of tries for each stage */ struct ieee80211_hw { struct ieee80211_conf conf; @@ -887,8 +934,8 @@ struct ieee80211_hw { u16 ampdu_queues; u16 max_listen_interval; s8 max_signal; - u8 max_altrates; - u8 max_altrate_tries; + u8 max_rates; + u8 max_rate_tries; }; /** @@ -927,9 +974,9 @@ static inline struct ieee80211_rate * ieee80211_get_tx_rate(const struct ieee80211_hw *hw, const struct ieee80211_tx_info *c) { - if (WARN_ON(c->tx_rate_idx < 0)) + if (WARN_ON(c->control.rates[0].idx < 0)) return NULL; - return &hw->wiphy->bands[c->band]->bitrates[c->tx_rate_idx]; + return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; } static inline struct ieee80211_rate * @@ -945,9 +992,9 @@ static inline struct ieee80211_rate * ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, const struct ieee80211_tx_info *c, int idx) { - if (c->control.retries[idx].rate_idx < 0) + if (c->control.rates[idx + 1].idx < 0) return NULL; - return &hw->wiphy->bands[c->band]->bitrates[c->control.retries[idx].rate_idx]; + return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; } /** @@ -1840,17 +1887,30 @@ struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw, /* 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 ieee80211_tx_rate_control - rate control information for/from RC algo + * + * @hw: The hardware the algorithm is invoked for. + * @sband: The band this frame is being transmitted on. + * @bss_conf: the current BSS configuration + * @reported_rate: The rate control algorithm can fill this in to indicate + * which rate should be reported to userspace as the current rate and + * used for rate calculations in the mesh network. + * @rts: whether RTS will be used for this frame because it is longer than the + * RTS threshold + * @short_preamble: whether mac80211 will request short-preamble transmission + * if the selected rate supports it + * @max_rate_idx: user-requested maximum rate (not MCS for now) + */ +struct ieee80211_tx_rate_control { + struct ieee80211_hw *hw; + struct ieee80211_supported_band *sband; + struct ieee80211_bss_conf *bss_conf; + struct sk_buff *skb; + struct ieee80211_tx_rate reported_rate; + bool rts, short_preamble; + u8 max_rate_idx; }; struct rate_control_ops { @@ -1869,10 +1929,8 @@ struct rate_control_ops { 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 (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, + struct ieee80211_tx_rate_control *txrc); void (*add_sta_debugfs)(void *priv, void *priv_sta, struct dentry *dir); |
