/* maximum number of rate stages */
#define IEEE80211_TX_MAX_RATES 4
+/* maximum number of rate table entries */
+#define IEEE80211_TX_RATE_TABLE_SIZE 4
+
/**
* struct ieee80211_tx_rate - rate selection/status
*
s8 rts_cts_rate_idx;
u8 use_rts:1;
u8 use_cts_prot:1;
+ u8 short_preamble:1;
+ u8 skip_table:1;
/* 2 bytes free */
};
/* only needed before rate control */
struct {
struct ieee80211_tx_rate driver_rates[
IEEE80211_TX_MAX_RATES];
+ u8 pad[4];
+
void *rate_driver_data[
IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)];
};
IEEE80211_STA_RX_BW_160,
};
+/**
+ * struct ieee80211_sta_rates - station rate selection table
+ *
+ * @rcu_head: RCU head used for freeing the table on update
+ * @rates: transmit rates/flags to be used by default.
+ * Overriding entries per-packet is possible by using cb tx control.
+ */
+struct ieee80211_sta_rates {
+ struct rcu_head rcu_head;
+ struct {
+ s8 idx;
+ u8 count;
+ u8 count_cts;
+ u8 count_rts;
+ u16 flags;
+ } rate[IEEE80211_TX_RATE_TABLE_SIZE];
+};
+
/**
* struct ieee80211_sta - station table entry
*
* notifications and capabilities. The value is only valid after
* the station moves to associated state.
* @smps_mode: current SMPS mode (off, static or dynamic)
+ * @tx_rates: rate control selection table
*/
struct ieee80211_sta {
u32 supp_rates[IEEE80211_NUM_BANDS];
u8 rx_nss;
enum ieee80211_sta_rx_bandwidth bandwidth;
enum ieee80211_smps_mode smps_mode;
+ struct ieee80211_sta_rates __rcu *rates;
/* must be last */
u8 drv_priv[0] __aligned(sizeof(void *));
* for different virtual interfaces. See the doc section on HW queue
* control for more details.
*
+ * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate
+ * selection table provided by the rate control algorithm.
+ *
* @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any
* P2P Interface. This will be honoured even if more than one interface
* is supported.
IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21,
IEEE80211_HW_AP_LINK_PS = 1<<22,
IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23,
+ IEEE80211_HW_SUPPORTS_RC_TABLE = 1<<24,
IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25,
IEEE80211_HW_TIMING_BEACON_ONLY = 1<<26,
};
void ieee80211_sta_set_buffered(struct ieee80211_sta *sta,
u8 tid, bool buffered);
+/**
+ * ieee80211_get_tx_rates - get the selected transmit rates for a packet
+ *
+ * Call this function in a driver with per-packet rate selection support
+ * to combine the rate info in the packet tx info with the most recent
+ * rate selection table for the station entry.
+ *
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ * @sta: the receiver station to which this packet is sent.
+ * @skb: the frame to be transmitted.
+ * @dest: buffer for extracted rate/retry information
+ * @max_rates: maximum number of rates to fetch
+ */
+void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta,
+ struct sk_buff *skb,
+ struct ieee80211_tx_rate *dest,
+ int max_rates);
+
/**
* ieee80211_tx_status - transmit status callback
*
return false;
}
+/**
+ * rate_control_set_rates - pass the sta rate selection to mac80211/driver
+ *
+ * When not doing a rate control probe to test rates, rate control should pass
+ * its rate selection to mac80211. If the driver supports receiving a station
+ * rate table, it will use it to ensure that frames are always sent based on
+ * the most recent rate control module decision.
+ *
+ * @hw: pointer as obtained from ieee80211_alloc_hw()
+ * @pubsta: &struct ieee80211_sta pointer to the target destination.
+ * @rates: new tx rate set to be used for this station.
+ */
+int rate_control_set_rates(struct ieee80211_hw *hw,
+ struct ieee80211_sta *pubsta,
+ struct ieee80211_sta_rates *rates);
+
int ieee80211_rate_control_register(struct rate_control_ops *ops);
void ieee80211_rate_control_unregister(struct rate_control_ops *ops);
return 0;
}
+static void __rate_control_send_low(struct ieee80211_hw *hw,
+ struct ieee80211_supported_band *sband,
+ struct ieee80211_sta *sta,
+ struct ieee80211_tx_info *info)
+{
+ if ((sband->band != IEEE80211_BAND_2GHZ) ||
+ !(info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
+ info->control.rates[0].idx = rate_lowest_index(sband, sta);
+ else
+ info->control.rates[0].idx =
+ rate_lowest_non_cck_index(sband, sta);
+
+ info->control.rates[0].count =
+ (info->flags & IEEE80211_TX_CTL_NO_ACK) ?
+ 1 : hw->max_rate_tries;
+
+ info->control.skip_table = 1;
+}
+
bool rate_control_send_low(struct ieee80211_sta *sta,
void *priv_sta,
int mcast_rate;
if (!sta || !priv_sta || rc_no_data_or_no_ack_use_min(txrc)) {
- if ((sband->band != IEEE80211_BAND_2GHZ) ||
- !(info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
- info->control.rates[0].idx =
- rate_lowest_index(txrc->sband, sta);
- else
- info->control.rates[0].idx =
- rate_lowest_non_cck_index(txrc->sband, sta);
- info->control.rates[0].count =
- (info->flags & IEEE80211_TX_CTL_NO_ACK) ?
- 1 : txrc->hw->max_rate_tries;
+ __rate_control_send_low(txrc->hw, sband, sta, info);
+
if (!sta && txrc->bss) {
mcast_rate = txrc->bss_conf->mcast_rate[sband->band];
if (mcast_rate > 0) {
static void rate_idx_match_mask(struct ieee80211_tx_rate *rate,
- struct ieee80211_tx_rate_control *txrc,
+ struct ieee80211_supported_band *sband,
+ enum nl80211_chan_width chan_width,
u32 mask,
u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN])
{
IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
alt_rate.count = rate->count;
if (rate_idx_match_legacy_mask(&alt_rate,
- txrc->sband->n_bitrates,
- mask)) {
+ sband->n_bitrates, mask)) {
*rate = alt_rate;
return;
}
} else {
- struct sk_buff *skb = txrc->skb;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- __le16 fc;
-
/* handle legacy rates */
- if (rate_idx_match_legacy_mask(rate, txrc->sband->n_bitrates,
- mask))
+ if (rate_idx_match_legacy_mask(rate, sband->n_bitrates, mask))
return;
/* if HT BSS, and we handle a data frame, also try HT rates */
- if (txrc->bss_conf->chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
- return;
-
- fc = hdr->frame_control;
- if (!ieee80211_is_data(fc))
+ if (chan_width == NL80211_CHAN_WIDTH_20_NOHT)
return;
alt_rate.idx = 0;
alt_rate.flags |= IEEE80211_TX_RC_MCS;
- if (txrc->bss_conf->chandef.width == NL80211_CHAN_WIDTH_40)
+ if (chan_width == NL80211_CHAN_WIDTH_40)
alt_rate.flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
if (rate_idx_match_mcs_mask(&alt_rate, mcs_mask)) {
*/
}
+static void rate_fixup_ratelist(struct ieee80211_vif *vif,
+ struct ieee80211_supported_band *sband,
+ struct ieee80211_tx_info *info,
+ struct ieee80211_tx_rate *rates,
+ int max_rates)
+{
+ struct ieee80211_rate *rate;
+ bool inval = false;
+ int i;
+
+ /*
+ * Set up the RTS/CTS rate as the fastest basic rate
+ * that is not faster than the data rate unless there
+ * is no basic rate slower than the data rate, in which
+ * case we pick the slowest basic rate
+ *
+ * XXX: Should this check all retry rates?
+ */
+ if (!(rates[0].flags & IEEE80211_TX_RC_MCS)) {
+ u32 basic_rates = vif->bss_conf.basic_rates;
+ s8 baserate = basic_rates ? ffs(basic_rates - 1) : 0;
+
+ rate = &sband->bitrates[rates[0].idx];
+
+ for (i = 0; i < sband->n_bitrates; i++) {
+ /* must be a basic rate */
+ if (!(basic_rates & BIT(i)))
+ continue;
+ /* must not be faster than the data rate */
+ if (sband->bitrates[i].bitrate > rate->bitrate)
+ continue;
+ /* maximum */
+ if (sband->bitrates[baserate].bitrate <
+ sband->bitrates[i].bitrate)
+ baserate = i;
+ }
+
+ info->control.rts_cts_rate_idx = baserate;
+ }
+
+ for (i = 0; i < max_rates; i++) {
+ /*
+ * make sure there's no valid rate following
+ * an invalid one, just in case drivers don't
+ * take the API seriously to stop at -1.
+ */
+ if (inval) {
+ rates[i].idx = -1;
+ continue;
+ }
+ if (rates[i].idx < 0) {
+ inval = true;
+ continue;
+ }
+
+ /*
+ * For now assume MCS is already set up correctly, this
+ * needs to be fixed.
+ */
+ if (rates[i].flags & IEEE80211_TX_RC_MCS) {
+ WARN_ON(rates[i].idx > 76);
+
+ if (!(rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) &&
+ info->control.use_cts_prot)
+ rates[i].flags |=
+ IEEE80211_TX_RC_USE_CTS_PROTECT;
+ continue;
+ }
+
+ if (rates[i].flags & IEEE80211_TX_RC_VHT_MCS) {
+ WARN_ON(ieee80211_rate_get_vht_mcs(&rates[i]) > 9);
+ continue;
+ }
+
+ /* set up RTS protection if desired */
+ if (info->control.use_rts) {
+ rates[i].flags |= IEEE80211_TX_RC_USE_RTS_CTS;
+ info->control.use_cts_prot = false;
+ }
+
+ /* RC is busted */
+ if (WARN_ON_ONCE(rates[i].idx >= sband->n_bitrates)) {
+ rates[i].idx = -1;
+ continue;
+ }
+
+ rate = &sband->bitrates[rates[i].idx];
+
+ /* set up short preamble */
+ if (info->control.short_preamble &&
+ rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
+ rates[i].flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
+
+ /* set up G protection */
+ if (!(rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) &&
+ info->control.use_cts_prot &&
+ rate->flags & IEEE80211_RATE_ERP_G)
+ rates[i].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
+ }
+}
+
+
+static void rate_control_fill_sta_table(struct ieee80211_sta *sta,
+ struct ieee80211_tx_info *info,
+ struct ieee80211_tx_rate *rates,
+ int max_rates)
+{
+ struct ieee80211_sta_rates *ratetbl = NULL;
+ int i;
+
+ if (sta && !info->control.skip_table)
+ ratetbl = rcu_dereference(sta->rates);
+
+ /* Fill remaining rate slots with data from the sta rate table. */
+ max_rates = min_t(int, max_rates, IEEE80211_TX_RATE_TABLE_SIZE);
+ for (i = 0; i < max_rates; i++) {
+ if (i < ARRAY_SIZE(info->control.rates) &&
+ info->control.rates[i].idx >= 0 &&
+ info->control.rates[i].count) {
+ if (rates != info->control.rates)
+ rates[i] = info->control.rates[i];
+ } else if (ratetbl) {
+ rates[i].idx = ratetbl->rate[i].idx;
+ rates[i].flags = ratetbl->rate[i].flags;
+ if (info->control.use_rts)
+ rates[i].count = ratetbl->rate[i].count_rts;
+ else if (info->control.use_cts_prot)
+ rates[i].count = ratetbl->rate[i].count_cts;
+ else
+ rates[i].count = ratetbl->rate[i].count;
+ } else {
+ rates[i].idx = -1;
+ rates[i].count = 0;
+ }
+
+ if (rates[i].idx < 0 || !rates[i].count)
+ break;
+ }
+}
+
+static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_sta *sta,
+ struct ieee80211_supported_band *sband,
+ struct ieee80211_tx_info *info,
+ struct ieee80211_tx_rate *rates,
+ int max_rates)
+{
+ enum nl80211_chan_width chan_width;
+ u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
+ bool has_mcs_mask;
+ u32 mask;
+ int i;
+
+ /*
+ * Try to enforce the rateidx mask the user wanted. skip this if the
+ * default mask (allow all rates) is used to save some processing for
+ * the common case.
+ */
+ mask = sdata->rc_rateidx_mask[info->band];
+ has_mcs_mask = sdata->rc_has_mcs_mask[info->band];
+ if (mask == (1 << sband->n_bitrates) - 1 && !has_mcs_mask)
+ return;
+
+ if (has_mcs_mask)
+ memcpy(mcs_mask, sdata->rc_rateidx_mcs_mask[info->band],
+ sizeof(mcs_mask));
+ else
+ memset(mcs_mask, 0xff, sizeof(mcs_mask));
+
+ if (sta) {
+ /* Filter out rates that the STA does not support */
+ mask &= sta->supp_rates[info->band];
+ for (i = 0; i < sizeof(mcs_mask); i++)
+ mcs_mask[i] &= sta->ht_cap.mcs.rx_mask[i];
+ }
+
+ /*
+ * Make sure the rate index selected for each TX rate is
+ * included in the configured mask and change the rate indexes
+ * if needed.
+ */
+ chan_width = sdata->vif.bss_conf.chandef.width;
+ for (i = 0; i < max_rates; i++) {
+ /* Skip invalid rates */
+ if (rates[i].idx < 0)
+ break;
+
+ rate_idx_match_mask(&rates[i], sband, mask, chan_width,
+ mcs_mask);
+ }
+}
+
+void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta,
+ struct sk_buff *skb,
+ struct ieee80211_tx_rate *dest,
+ int max_rates)
+{
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_supported_band *sband;
+
+ rate_control_fill_sta_table(sta, info, dest, max_rates);
+
+ if (!vif)
+ return;
+
+ sdata = vif_to_sdata(vif);
+ sband = sdata->local->hw.wiphy->bands[info->band];
+
+ if (ieee80211_is_data(hdr->frame_control))
+ rate_control_apply_mask(sdata, sta, sband, info, dest, max_rates);
+
+ if (dest[0].idx < 0)
+ __rate_control_send_low(&sdata->local->hw, sband, sta, info);
+
+ if (sta)
+ rate_fixup_ratelist(vif, sband, info, dest, max_rates);
+}
+EXPORT_SYMBOL(ieee80211_get_tx_rates);
+
void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
struct ieee80211_tx_rate_control *txrc)
struct ieee80211_sta *ista = NULL;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
int i;
- u32 mask;
- u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
if (sta && test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) {
ista = &sta->sta;
ref->ops->get_rate(ref->priv, ista, priv_sta, txrc);
- /*
- * Try to enforce the rateidx mask the user wanted. skip this if the
- * default mask (allow all rates) is used to save some processing for
- * the common case.
- */
- mask = sdata->rc_rateidx_mask[info->band];
- if (mask != (1 << txrc->sband->n_bitrates) - 1 || txrc->rate_idx_mcs_mask) {
- if (txrc->rate_idx_mcs_mask)
- memcpy(mcs_mask, txrc->rate_idx_mcs_mask, sizeof(mcs_mask));
- else
- memset(mcs_mask, 0xff, sizeof(mcs_mask));
-
- if (sta) {
- /* Filter out rates that the STA does not support */
- mask &= sta->sta.supp_rates[info->band];
- for (i = 0; i < sizeof(mcs_mask); i++)
- mcs_mask[i] &= sta->sta.ht_cap.mcs.rx_mask[i];
- }
- /*
- * Make sure the rate index selected for each TX rate is
- * included in the configured mask and change the rate indexes
- * if needed.
- */
- for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
- /* Skip invalid rates */
- if (info->control.rates[i].idx < 0)
- break;
- rate_idx_match_mask(&info->control.rates[i], txrc,
- mask, mcs_mask);
- }
- }
+ if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
+ return;
+
+ ieee80211_get_tx_rates(&sdata->vif, ista, txrc->skb,
+ info->control.rates,
+ ARRAY_SIZE(info->control.rates));
+}
- BUG_ON(info->control.rates[0].idx < 0);
+int rate_control_set_rates(struct ieee80211_hw *hw,
+ struct ieee80211_sta *pubsta,
+ struct ieee80211_sta_rates *rates)
+{
+ struct ieee80211_sta_rates *old = rcu_dereference(pubsta->rates);
+
+ rcu_assign_pointer(pubsta->rates, rates);
+ if (old)
+ kfree_rcu(old, rcu_head);
+
+ return 0;
}
+EXPORT_SYMBOL(rate_control_set_rates);
int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
const char *name)
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
/* assume HW handles this */
- if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
+ if (tx->rate.flags & IEEE80211_TX_RC_MCS)
return 0;
/* uh huh? */
- if (WARN_ON_ONCE(info->control.rates[0].idx < 0))
+ if (WARN_ON_ONCE(tx->rate.idx < 0))
return 0;
sband = local->hw.wiphy->bands[info->band];
- txrate = &sband->bitrates[info->control.rates[0].idx];
+ txrate = &sband->bitrates[tx->rate.idx];
erp = txrate->flags & IEEE80211_RATE_ERP_G;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
struct ieee80211_hdr *hdr = (void *)tx->skb->data;
struct ieee80211_supported_band *sband;
- struct ieee80211_rate *rate;
- int i;
u32 len;
- bool inval = false, rts = false, short_preamble = false;
struct ieee80211_tx_rate_control txrc;
+ struct ieee80211_sta_rates *ratetbl = NULL;
bool assoc = false;
memset(&txrc, 0, sizeof(txrc));
/* set up RTS protection if desired */
if (len > tx->local->hw.wiphy->rts_threshold) {
- txrc.rts = rts = true;
+ txrc.rts = true;
}
- info->control.use_rts = rts;
+ info->control.use_rts = txrc.rts;
info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
/*
if (tx->sdata->vif.bss_conf.use_short_preamble &&
(ieee80211_is_data(hdr->frame_control) ||
(tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
- txrc.short_preamble = short_preamble = true;
+ txrc.short_preamble = true;
+
+ info->control.short_preamble = txrc.short_preamble;
if (tx->sta)
assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
*/
rate_control_get_rate(tx->sdata, tx->sta, &txrc);
- if (unlikely(info->control.rates[0].idx < 0))
- return TX_DROP;
+ if (tx->sta && !info->control.skip_table)
+ ratetbl = rcu_dereference(tx->sta->sta.rates);
+
+ if (unlikely(info->control.rates[0].idx < 0)) {
+ if (ratetbl) {
+ struct ieee80211_tx_rate rate = {
+ .idx = ratetbl->rate[0].idx,
+ .flags = ratetbl->rate[0].flags,
+ .count = ratetbl->rate[0].count
+ };
+
+ if (ratetbl->rate[0].idx < 0)
+ return TX_DROP;
+
+ tx->rate = rate;
+ } else {
+ return TX_DROP;
+ }
+ } else {
+ tx->rate = info->control.rates[0];
+ }
if (txrc.reported_rate.idx < 0) {
- txrc.reported_rate = info->control.rates[0];
+ txrc.reported_rate = tx->rate;
if (tx->sta && ieee80211_is_data(hdr->frame_control))
tx->sta->last_tx_rate = txrc.reported_rate;
} else if (tx->sta)
tx->sta->last_tx_rate = txrc.reported_rate;
+ if (ratetbl)
+ return TX_CONTINUE;
+
if (unlikely(!info->control.rates[0].count))
info->control.rates[0].count = 1;
(info->flags & IEEE80211_TX_CTL_NO_ACK)))
info->control.rates[0].count = 1;
- if (is_multicast_ether_addr(hdr->addr1)) {
- /*
- * XXX: verify the rate is in the basic rateset
- */
- return TX_CONTINUE;
- }
-
- /*
- * Set up the RTS/CTS rate as the fastest basic rate
- * that is not faster than the data rate unless there
- * is no basic rate slower than the data rate, in which
- * case we pick the slowest basic rate
- *
- * XXX: Should this check all retry rates?
- */
- if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) {
- u32 basic_rates = tx->sdata->vif.bss_conf.basic_rates;
- s8 baserate = basic_rates ? ffs(basic_rates - 1) : 0;
-
- rate = &sband->bitrates[info->control.rates[0].idx];
-
- for (i = 0; i < sband->n_bitrates; i++) {
- /* must be a basic rate */
- if (!(basic_rates & BIT(i)))
- continue;
- /* must not be faster than the data rate */
- if (sband->bitrates[i].bitrate > rate->bitrate)
- continue;
- /* maximum */
- if (sband->bitrates[baserate].bitrate <
- sband->bitrates[i].bitrate)
- baserate = i;
- }
-
- info->control.rts_cts_rate_idx = baserate;
- }
-
- for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
- struct ieee80211_tx_rate *rc_rate = &info->control.rates[i];
-
- /*
- * make sure there's no valid rate following
- * an invalid one, just in case drivers don't
- * take the API seriously to stop at -1.
- */
- if (inval) {
- rc_rate->idx = -1;
- continue;
- }
- if (rc_rate->idx < 0) {
- inval = true;
- continue;
- }
-
- /*
- * For now assume MCS is already set up correctly, this
- * needs to be fixed.
- */
- if (rc_rate->flags & IEEE80211_TX_RC_MCS) {
- WARN_ON(rc_rate->idx > 76);
-
- if (!(rc_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) &&
- tx->sdata->vif.bss_conf.use_cts_prot)
- rc_rate->flags |=
- IEEE80211_TX_RC_USE_CTS_PROTECT;
- continue;
- }
-
- if (rc_rate->flags & IEEE80211_TX_RC_VHT_MCS) {
- WARN_ON(ieee80211_rate_get_vht_mcs(rc_rate) > 9);
- continue;
- }
-
- /* set up RTS protection if desired */
- if (rts)
- rc_rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS;
-
- /* RC is busted */
- if (WARN_ON_ONCE(rc_rate->idx >= sband->n_bitrates)) {
- rc_rate->idx = -1;
- continue;
- }
-
- rate = &sband->bitrates[rc_rate->idx];
-
- /* set up short preamble */
- if (short_preamble &&
- rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
- rc_rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
-
- /* set up G protection */
- if (!rts && tx->sdata->vif.bss_conf.use_cts_prot &&
- rate->flags & IEEE80211_RATE_ERP_G)
- rc_rate->flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
- }
-
return TX_CONTINUE;
}
projects / mirror_ubuntu-focal-kernel.git / commitdiff