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-rw-r--r--include/net/mac80211.h254
1 files changed, 156 insertions, 98 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 9801afb6254..3741c0a7978 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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-06 14:48:33 +0000