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-rw-r--r--drivers/net/wireless/iwlwifi/mvm/constants.h1
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/mvm.h3
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/rs.c131
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/rx.c41
4 files changed, 136 insertions, 40 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/constants.h b/drivers/net/wireless/iwlwifi/mvm/constants.h
index a355788b1166..f47f4586422c 100644
--- a/drivers/net/wireless/iwlwifi/mvm/constants.h
+++ b/drivers/net/wireless/iwlwifi/mvm/constants.h
@@ -94,5 +94,6 @@
#define IWL_MVM_BT_COEX_MPLUT 1
#define IWL_MVM_FW_MCAST_FILTER_PASS_ALL 0
#define IWL_MVM_QUOTA_THRESHOLD 8
+#define IWL_MVM_RS_RSSI_BASED_INIT_RATE 0
#endif /* __MVM_CONSTANTS_H */
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index c913d5e80c9d..7d0194bccdd6 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -989,6 +989,9 @@ void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm,
struct iwl_mvm_frame_stats *stats,
u32 rate, bool agg);
int rs_pretty_print_rate(char *buf, const u32 rate);
+void rs_update_last_rssi(struct iwl_mvm *mvm,
+ struct iwl_lq_sta *lq_sta,
+ struct ieee80211_rx_status *rx_status);
/* power management */
int iwl_mvm_power_update_device(struct iwl_mvm *mvm);
diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c
index f77dfe4df074..d179a8eb50df 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.c
@@ -2288,6 +2288,110 @@ out:
lq_sta->last_txrate_idx = index;
}
+struct rs_init_rate_info {
+ s8 rssi;
+ u8 rate_idx;
+};
+
+static const struct rs_init_rate_info rs_init_rates_24ghz[] = {
+ { -60, IWL_RATE_54M_INDEX },
+ { -64, IWL_RATE_48M_INDEX },
+ { -68, IWL_RATE_36M_INDEX },
+ { -80, IWL_RATE_24M_INDEX },
+ { -84, IWL_RATE_18M_INDEX },
+ { -85, IWL_RATE_12M_INDEX },
+ { -86, IWL_RATE_11M_INDEX },
+ { -88, IWL_RATE_5M_INDEX },
+ { -90, IWL_RATE_2M_INDEX },
+ { S8_MIN, IWL_RATE_1M_INDEX },
+};
+
+static const struct rs_init_rate_info rs_init_rates_5ghz[] = {
+ { -60, IWL_RATE_54M_INDEX },
+ { -64, IWL_RATE_48M_INDEX },
+ { -72, IWL_RATE_36M_INDEX },
+ { -80, IWL_RATE_24M_INDEX },
+ { -84, IWL_RATE_18M_INDEX },
+ { -85, IWL_RATE_12M_INDEX },
+ { -87, IWL_RATE_9M_INDEX },
+ { S8_MIN, IWL_RATE_6M_INDEX },
+};
+
+/* Choose an initial legacy rate and antenna to use based on the RSSI
+ * of last Rx
+ */
+static void rs_get_initial_rate(struct iwl_mvm *mvm,
+ struct iwl_lq_sta *lq_sta,
+ enum ieee80211_band band,
+ struct rs_rate *rate)
+{
+ int i, nentries;
+ s8 best_rssi = S8_MIN;
+ u8 best_ant = ANT_NONE;
+ u8 valid_tx_ant = mvm->fw->valid_tx_ant;
+ const struct rs_init_rate_info *initial_rates;
+
+ for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
+ if (!(lq_sta->pers.chains & BIT(i)))
+ continue;
+
+ if (lq_sta->pers.chain_signal[i] > best_rssi) {
+ best_rssi = lq_sta->pers.chain_signal[i];
+ best_ant = BIT(i);
+ }
+ }
+
+ IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n",
+ rs_pretty_ant(best_ant), best_rssi);
+
+ if (best_ant != ANT_A && best_ant != ANT_B)
+ rate->ant = first_antenna(valid_tx_ant);
+ else
+ rate->ant = best_ant;
+
+ rate->sgi = false;
+ rate->ldpc = false;
+ rate->bw = RATE_MCS_CHAN_WIDTH_20;
+
+ rate->index = find_first_bit(&lq_sta->active_legacy_rate,
+ BITS_PER_LONG);
+
+ if (band == IEEE80211_BAND_5GHZ) {
+ rate->type = LQ_LEGACY_A;
+ initial_rates = rs_init_rates_5ghz;
+ nentries = ARRAY_SIZE(rs_init_rates_5ghz);
+ } else {
+ rate->type = LQ_LEGACY_G;
+ initial_rates = rs_init_rates_24ghz;
+ nentries = ARRAY_SIZE(rs_init_rates_24ghz);
+ }
+
+ if (IWL_MVM_RS_RSSI_BASED_INIT_RATE) {
+ for (i = 0; i < nentries; i++) {
+ int rate_idx = initial_rates[i].rate_idx;
+ if ((best_rssi >= initial_rates[i].rssi) &&
+ (BIT(rate_idx) & lq_sta->active_legacy_rate)) {
+ rate->index = rate_idx;
+ break;
+ }
+ }
+ }
+
+ IWL_DEBUG_RATE(mvm, "rate_idx %d ANT %s\n", rate->index,
+ rs_pretty_ant(rate->ant));
+}
+
+/* Save info about RSSI of last Rx */
+void rs_update_last_rssi(struct iwl_mvm *mvm,
+ struct iwl_lq_sta *lq_sta,
+ struct ieee80211_rx_status *rx_status)
+{
+ lq_sta->pers.chains = rx_status->chains;
+ lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0];
+ lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1];
+ lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2];
+}
+
/**
* rs_initialize_lq - Initialize a station's hardware rate table
*
@@ -2310,17 +2414,11 @@ static void rs_initialize_lq(struct iwl_mvm *mvm,
{
struct iwl_scale_tbl_info *tbl;
struct rs_rate *rate;
- int i;
u8 active_tbl = 0;
- u8 valid_tx_ant;
if (!sta || !lq_sta)
return;
- i = lq_sta->last_txrate_idx;
-
- valid_tx_ant = mvm->fw->valid_tx_ant;
-
if (!lq_sta->search_better_tbl)
active_tbl = lq_sta->active_tbl;
else
@@ -2329,18 +2427,8 @@ static void rs_initialize_lq(struct iwl_mvm *mvm,
tbl = &(lq_sta->lq_info[active_tbl]);
rate = &tbl->rate;
- if ((i < 0) || (i >= IWL_RATE_COUNT))
- i = 0;
-
- rate->index = i;
- rate->ant = first_antenna(valid_tx_ant);
- rate->sgi = false;
- rate->ldpc = false;
- rate->bw = RATE_MCS_CHAN_WIDTH_20;
- if (band == IEEE80211_BAND_5GHZ)
- rate->type = LQ_LEGACY_A;
- else
- rate->type = LQ_LEGACY_G;
+ rs_get_initial_rate(mvm, lq_sta, band, rate);
+ lq_sta->last_txrate_idx = rate->index;
WARN_ON_ONCE(rate->ant != ANT_A && rate->ant != ANT_B);
if (rate->ant == ANT_A)
@@ -2397,6 +2485,8 @@ static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
lq_sta->pers.dbg_fixed_rate = 0;
lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID;
#endif
+ lq_sta->pers.chains = 0;
+ memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
return &sta_priv->lq_sta;
}
@@ -2630,11 +2720,6 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
/* as default allow aggregation for all tids */
lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
-
- /* Set last_txrate_idx to lowest rate */
- lq_sta->last_txrate_idx = rate_lowest_index(sband, sta);
- if (sband->band == IEEE80211_BAND_5GHZ)
- lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
lq_sta->is_agg = 0;
#ifdef CONFIG_IWLWIFI_DEBUGFS
iwl_mvm_reset_frame_stats(mvm, &mvm->drv_rx_stats);
diff --git a/drivers/net/wireless/iwlwifi/mvm/rx.c b/drivers/net/wireless/iwlwifi/mvm/rx.c
index a6cb84ed653f..3cf40f3f58ec 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rx.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rx.c
@@ -246,6 +246,7 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_rx_phy_info *phy_info;
struct iwl_rx_mpdu_res_start *rx_res;
+ struct ieee80211_sta *sta;
u32 len;
u32 ampdu_status;
u32 rate_n_flags;
@@ -261,23 +262,6 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
memset(&rx_status, 0, sizeof(rx_status));
/*
- * We have tx blocked stations (with CS bit). If we heard frames from
- * a blocked station on a new channel we can TX to it again.
- */
- if (unlikely(mvm->csa_tx_block_bcn_timeout)) {
- struct ieee80211_sta *sta;
-
- rcu_read_lock();
-
- sta = ieee80211_find_sta(
- rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2);
- if (sta)
- iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
-
- rcu_read_unlock();
- }
-
- /*
* drop the packet if it has failed being decrypted by HW
*/
if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) {
@@ -325,6 +309,29 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status.signal,
(unsigned long long)rx_status.mactime);
+ rcu_read_lock();
+ /*
+ * We have tx blocked stations (with CS bit). If we heard frames from
+ * a blocked station on a new channel we can TX to it again.
+ */
+ if (unlikely(mvm->csa_tx_block_bcn_timeout)) {
+ sta = ieee80211_find_sta(
+ rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2);
+ if (sta)
+ iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
+ }
+
+ /* This is fine since we don't support multiple AP interfaces */
+ sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
+ if (sta) {
+ struct iwl_mvm_sta *mvmsta;
+ mvmsta = iwl_mvm_sta_from_mac80211(sta);
+ rs_update_last_rssi(mvm, &mvmsta->lq_sta,
+ &rx_status);
+ }
+
+ rcu_read_unlock();
+
/* set the preamble flag if appropriate */
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
rx_status.flag |= RX_FLAG_SHORTPRE;
generated by cgit v1.2.3 (git 2.0.4) at 2024-10-09 05:23:15 +0000