wifi: mac80211: parse A-MSDU len from EHT capabilities

On 2.4 GHz there's no VHT, so EHT defines its own bits for
the maximum MPDU length. Parse and store them in the link_sta.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20241007144851.e05da59c419a.I0b1c047639160d9a96f48ab013c18ea33f5473b0@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/eht.c b/net/mac80211/eht.c
index ddc7acc68335a65084da932888c1373bb83ebdc9..7a3116c36df9f489eebd85b26d27f5c2545fb9d2 100644 (file)
--- a/net/mac80211/eht.c
+++ b/net/mac80211/eht.c
@@ -2,7 +2,7 @@
 /*
  * EHT handling
  *
- * Copyright(c) 2021-2023 Intel Corporation
+ * Copyright(c) 2021-2024 Intel Corporation
  */
 
 #include "ieee80211_i.h"
@@ -75,4 +75,23 @@ ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata,
 
        link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
        link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
+
+       switch (u8_get_bits(eht_cap->eht_cap_elem.mac_cap_info[0],
+                           IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_MASK)) {
+       case IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_11454:
+               link_sta->pub->agg.max_amsdu_len =
+                       IEEE80211_MAX_MPDU_LEN_VHT_11454;
+               break;
+       case IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_7991:
+               link_sta->pub->agg.max_amsdu_len =
+                       IEEE80211_MAX_MPDU_LEN_VHT_7991;
+               break;
+       case IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_3895:
+       default:
+               link_sta->pub->agg.max_amsdu_len =
+                       IEEE80211_MAX_MPDU_LEN_VHT_3895;
+               break;
+       }
+
+       ieee80211_sta_recalc_aggregates(&link_sta->sta->sta);
 }