mac80211: minstrel_ht: Increase the range of handled rate indexes

Since 5935839ad735 ("mac80211: improve minstrel_ht rate sorting by
throughput & probability"), the rate indexes are manipulated via u8's
and hence allow for a maximum of 256 mcs_group entries in
minstrel_mcs_groups.

ATM, minstrel_ht advertizes support up to 3HTSS@40MHz, consuming:
8(MCS_GROUP_RATES) * (3(SS)*2(GI)*2(BW)+1(CCK)), i.e. 104 entries.

Support for 3VHTSS@80MHz will require:
10(MCS_GROUP_RATES) * (3(SS)*2(GI)*2(BW)+1(CCK)) +
10(MCS_GROUP_RATES) * (3(SS)*2(GI)*3(BW)), i.e. 130 + 180 entries.

This change moves from u8s to u16s where necessary.

Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 17ef54a..ccec718 100644 (file)
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -240,8 +240,8 @@ minstrel_ht_calc_tp(struct minstrel_ht_sta *mi, int group, int rate)
  * MCS groups, CCK rates do not provide aggregation and are therefore at last.
  */
 static void
-minstrel_ht_sort_best_tp_rates(struct minstrel_ht_sta *mi, u8 index,
-                              u8 *tp_list)
+minstrel_ht_sort_best_tp_rates(struct minstrel_ht_sta *mi, u16 index,
+                              u16 *tp_list)
 {
        int cur_group, cur_idx, cur_thr, cur_prob;
        int tmp_group, tmp_idx, tmp_thr, tmp_prob;
@@ -278,7 +278,7 @@ minstrel_ht_sort_best_tp_rates(struct minstrel_ht_sta *mi, u8 index,
  * Find and set the topmost probability rate per sta and per group
  */
 static void
-minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u8 index)
+minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 index)
 {
        struct minstrel_mcs_group_data *mg;
        struct minstrel_rate_stats *mr;
@@ -321,8 +321,8 @@ minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u8 index)
  */
 static void
 minstrel_ht_assign_best_tp_rates(struct minstrel_ht_sta *mi,
-                                u8 tmp_mcs_tp_rate[MAX_THR_RATES],
-                                u8 tmp_cck_tp_rate[MAX_THR_RATES])
+                                u16 tmp_mcs_tp_rate[MAX_THR_RATES],
+                                u16 tmp_cck_tp_rate[MAX_THR_RATES])
 {
        unsigned int tmp_group, tmp_idx, tmp_cck_tp, tmp_mcs_tp;
        int i;
@@ -386,8 +386,8 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
        struct minstrel_mcs_group_data *mg;
        struct minstrel_rate_stats *mr;
        int group, i, j;
-       u8 tmp_mcs_tp_rate[MAX_THR_RATES], tmp_group_tp_rate[MAX_THR_RATES];
-       u8 tmp_cck_tp_rate[MAX_THR_RATES], index;
+       u16 tmp_mcs_tp_rate[MAX_THR_RATES], tmp_group_tp_rate[MAX_THR_RATES];
+       u16 tmp_cck_tp_rate[MAX_THR_RATES], index;
 
        if (mi->ampdu_packets > 0) {
                mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len,
@@ -517,7 +517,7 @@ minstrel_next_sample_idx(struct minstrel_ht_sta *mi)
 }
 
 static void
-minstrel_downgrade_rate(struct minstrel_ht_sta *mi, u8 *idx, bool primary)
+minstrel_downgrade_rate(struct minstrel_ht_sta *mi, u16 *idx, bool primary)
 {
        int group, orig_group;
 

diff --git a/net/mac80211/rc80211_minstrel_ht.h b/net/mac80211/rc80211_minstrel_ht.h
index 01570e0..8b54e89 100644 (file)
--- a/net/mac80211/rc80211_minstrel_ht.h
+++ b/net/mac80211/rc80211_minstrel_ht.h
@@ -34,8 +34,8 @@ struct minstrel_mcs_group_data {
        u8 supported;
 
        /* sorted rate set within a MCS group*/
-       u8 max_group_tp_rate[MAX_THR_RATES];
-       u8 max_group_prob_rate;
+       u16 max_group_tp_rate[MAX_THR_RATES];
+       u16 max_group_prob_rate;
 
        /* MCS rate statistics */
        struct minstrel_rate_stats rates[MCS_GROUP_RATES];
@@ -52,8 +52,8 @@ struct minstrel_ht_sta {
        unsigned int avg_ampdu_len;
 
        /* overall sorted rate set */
-       u8 max_tp_rate[MAX_THR_RATES];
-       u8 max_prob_rate;
+       u16 max_tp_rate[MAX_THR_RATES];
+       u16 max_prob_rate;
 
        /* time of last status update */
        unsigned long stats_update;