From: Johannes Berg <johannes.berg@xxxxxxxxx>
Add support for reading the EHT MAC capabilities A-MPDU
size exponent field, as indicated by the draft spec.
Also clarify the existing code a bit and add comments
so it's clearer to understand what's going on here.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx>
---
drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 27 +++++++++++++-------
1 file changed, 18 insertions(+), 9 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
index 3c24b25fe661..37a52ffa8897 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -60,22 +60,27 @@ u32 iwl_mvm_get_sta_ampdu_dens(struct ieee80211_link_sta *link_sta,
if (WARN_ON(!link_sta))
return 0;
- if (link_sta->ht_cap.ht_supported)
+ /* Note that we always use only legacy & highest supported PPDUs, so
+ * of Draft P802.11be D.30 Table 10-12a--Fields used for calculating
+ * the maximum A-MPDU size of various PPDU types in different bands,
+ * we only need to worry about the highest supported PPDU type here.
+ */
+
+ if (link_sta->ht_cap.ht_supported) {
+ agg_size = link_sta->ht_cap.ampdu_factor;
mpdu_dens = link_sta->ht_cap.ampdu_density;
+ }
- if (link_conf->chandef.chan->band ==
- NL80211_BAND_6GHZ) {
+ if (link_conf->chandef.chan->band == NL80211_BAND_6GHZ) {
+ /* overwrite HT values on 6 GHz */
mpdu_dens = le16_get_bits(link_sta->he_6ghz_capa.capa,
IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START);
agg_size = le16_get_bits(link_sta->he_6ghz_capa.capa,
IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP);
} else if (link_sta->vht_cap.vht_supported) {
- agg_size = link_sta->vht_cap.cap &
- IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
- agg_size >>=
- IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
- } else if (link_sta->ht_cap.ht_supported) {
- agg_size = link_sta->ht_cap.ampdu_factor;
+ /* if VHT supported overwrite HT value */
+ agg_size = u32_get_bits(link_sta->vht_cap.cap,
+ IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
}
/* D6.0 10.12.2 A-MPDU length limit rules
@@ -91,6 +96,10 @@ u32 iwl_mvm_get_sta_ampdu_dens(struct ieee80211_link_sta *link_sta,
u8_get_bits(link_sta->he_cap.he_cap_elem.mac_cap_info[3],
IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK);
+ if (link_sta->eht_cap.has_eht)
+ agg_size += u8_get_bits(link_sta->eht_cap.eht_cap_elem.mac_cap_info[1],
+ IEEE80211_EHT_MAC_CAP1_MAX_AMPDU_LEN_MASK);
+
/* Limit to max A-MPDU supported by FW */
agg_size = min_t(u32, agg_size,
STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT);
--
2.38.1
