The branch main has been updated by bz: URL: https://cgit.FreeBSD.org/src/commit/?id=adb4901ac9ae6c2ceb4194d139ed3176f6ed5e55
commit adb4901ac9ae6c2ceb4194d139ed3176f6ed5e55 Author: Bjoern A. Zeeb <[email protected]> AuthorDate: 2025-11-28 23:10:45 +0000 Commit: Bjoern A. Zeeb <[email protected]> CommitDate: 2025-12-02 18:46:44 +0000 LinuxKPI: 802.11: when synching HT and VHT cap, mask rx_mcs When we sync the sta data, mask the rx_mcs with what the hardware is able to do so that we do not leave, e.g., a 2nd stream enabled on a 1x1 chipset. iwlwifi(4) has a further check for the smps_mode to limit to NSS=1 but I believe that is historic and not actually in use anymore. This fixes firmware crashes on TLC updates with nss=1 but the nss=2 array index also being populated (with HT/VHT80/160 mcs information): data being populated: iwlwifi0: 0x20101A0D | ADVANCED_SYSASSERT iwlwifi0: 0x00000006 | umac data1 iwlwifi0: 0x00000001 | umac data2 iwlwifi0: 0x000003FF | umac data3 iwlwifi0: 0x____050F | last host cmd Reported by: Claudio Zumbo (claudiozumbo gmail.com), Erik Power Tested by: Claudio Zumbo, Erik Power (eppower umich.edu) PR: 290622 MFC after: 3 days Sponsored by: The FreeBSD Foundation --- sys/compat/linuxkpi/common/src/linux_80211.c | 99 ++++++++++++++++++++-------- 1 file changed, 71 insertions(+), 28 deletions(-) diff --git a/sys/compat/linuxkpi/common/src/linux_80211.c b/sys/compat/linuxkpi/common/src/linux_80211.c index 8b1f5f0e0399..8098d02da1a9 100644 --- a/sys/compat/linuxkpi/common/src/linux_80211.c +++ b/sys/compat/linuxkpi/common/src/linux_80211.c @@ -128,11 +128,11 @@ SYSCTL_INT(_compat_linuxkpi_80211, OID_AUTO, debug, CTLFLAG_RWTUN, #define UNIMPLEMENTED if (linuxkpi_debug_80211 & D80211_TODO) \ printf("XXX-TODO %s:%d: UNIMPLEMENTED\n", __func__, __LINE__) -#define TRACEOK() if (linuxkpi_debug_80211 & D80211_TRACEOK) \ - printf("XXX-TODO %s:%d: TRACEPOINT\n", __func__, __LINE__) +#define TRACEOK(_fmt, ...) if (linuxkpi_debug_80211 & D80211_TRACEOK) \ + printf("%s:%d: TRACEPOINT " _fmt "\n", __func__, __LINE__, ##__VA_ARGS__) #else #define UNIMPLEMENTED do { } while (0) -#define TRACEOK() do { } while (0) +#define TRACEOK(...) do { } while (0) #endif /* #define PREP_TX_INFO_DURATION (IEEE80211_TRANS_WAIT * 1000) */ @@ -474,12 +474,14 @@ lkpi_sync_chanctx_cw_from_rx_bw(struct ieee80211_hw *hw, #if defined(LKPI_80211_HT) static void -lkpi_sta_sync_ht_from_ni(struct ieee80211_vif *vif, struct ieee80211_sta *sta, - struct ieee80211_node *ni) +lkpi_sta_sync_ht_from_ni(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_sta *sta, struct ieee80211_node *ni) { struct ieee80211vap *vap; uint8_t *ie; struct ieee80211_ht_cap *htcap; + struct ieee80211_sta_ht_cap *ht_cap, *sta_ht_cap; + enum nl80211_band band; int i, rx_nss; if ((ni->ni_flags & IEEE80211_NODE_HT) == 0) { @@ -513,13 +515,23 @@ lkpi_sta_sync_ht_from_ni(struct ieee80211_vif *vif, struct ieee80211_sta *sta, * MCS sets from the Rx MCS Bitmask; then there is MCS 32 and * MCS33.. is UEQM. */ + band = vif->bss_conf.chanctx_conf->def.chan->band; + ht_cap = &hw->wiphy->bands[band]->ht_cap; + sta_ht_cap = &sta->deflink.ht_cap; rx_nss = 0; for (i = 0; i < 4; i++) { - if (htcap->mcs.rx_mask[i] != 0) + TRACEOK("HT rx_mask[%d] sta %#04x & hw %#04x", i, + sta_ht_cap->mcs.rx_mask[i], ht_cap->mcs.rx_mask[i]); + sta_ht_cap->mcs.rx_mask[i] = + sta_ht_cap->mcs.rx_mask[i] & ht_cap->mcs.rx_mask[i]; + /* XXX-BZ masking unequal modulation? */ + + if (sta_ht_cap->mcs.rx_mask[i] != 0) rx_nss++; } if (rx_nss > 0) { - sta->deflink.rx_nss = rx_nss; + TRACEOK("HT rx_nss = max(%d, %d)", rx_nss, sta->deflink.rx_nss); + sta->deflink.rx_nss = MAX(rx_nss, sta->deflink.rx_nss); } else { sta->deflink.ht_cap.ht_supported = false; return; @@ -548,14 +560,15 @@ lkpi_sta_sync_ht_from_ni(struct ieee80211_vif *vif, struct ieee80211_sta *sta, #if defined(LKPI_80211_VHT) static void -lkpi_sta_sync_vht_from_ni(struct ieee80211_vif *vif, struct ieee80211_sta *sta, - struct ieee80211_node *ni) +lkpi_sta_sync_vht_from_ni(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_sta *sta, struct ieee80211_node *ni) { + struct ieee80211_sta_vht_cap *vht_cap, *sta_vht_cap;; enum ieee80211_sta_rx_bandwidth bw; + enum nl80211_band band; uint32_t width; int rx_nss; - uint16_t rx_mcs_map; - uint8_t mcs; + uint16_t rx_map, tx_map; if ((ni->ni_flags & IEEE80211_NODE_VHT) == 0 || !IEEE80211_IS_CHAN_VHT_5GHZ(ni->ni_chan)) { @@ -609,18 +622,49 @@ lkpi_sta_sync_vht_from_ni(struct ieee80211_vif *vif, struct ieee80211_sta *sta, sta->deflink.bandwidth = bw; skip_bw: + band = vif->bss_conf.chanctx_conf->def.chan->band; + vht_cap = &hw->wiphy->bands[band]->vht_cap; + sta_vht_cap = &sta->deflink.vht_cap; + rx_nss = 0; - rx_mcs_map = sta->deflink.vht_cap.vht_mcs.rx_mcs_map; + rx_map = tx_map = 0; for (int i = 7; i >= 0; i--) { - mcs = rx_mcs_map >> (2 * i); - mcs &= 0x3; - if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) { - rx_nss = i + 1; - break; + uint8_t card, sta; + + card = (vht_cap->vht_mcs.rx_mcs_map >> (2 * i)) & 0x3; + sta = (sta_vht_cap->vht_mcs.rx_mcs_map >> (2 * i)) & 0x3; + if (sta != IEEE80211_VHT_MCS_NOT_SUPPORTED) { + if (card == IEEE80211_VHT_MCS_NOT_SUPPORTED) + sta = IEEE80211_VHT_MCS_NOT_SUPPORTED; + else { + sta = MIN(sta, card); + rx_nss = i + 1; + } + } + rx_map |= (sta << (2 * i)); + + card = (vht_cap->vht_mcs.tx_mcs_map >> (2 * i)) & 0x3; + sta = (sta_vht_cap->vht_mcs.tx_mcs_map >> (2 * i)) & 0x3; + if (sta != IEEE80211_VHT_MCS_NOT_SUPPORTED) { + if (card == IEEE80211_VHT_MCS_NOT_SUPPORTED) + sta = IEEE80211_VHT_MCS_NOT_SUPPORTED; + else + sta = MIN(sta, card); } + tx_map |= (sta << (2 * i)); + } + TRACEOK("VHT rx_mcs_map %#010x->%#010x, tx_mcs_map %#010x->%#010x, rx_nss = %d", + sta_vht_cap->vht_mcs.rx_mcs_map, rx_map, + sta_vht_cap->vht_mcs.tx_mcs_map, tx_map, rx_nss); + sta_vht_cap->vht_mcs.rx_mcs_map = rx_map; + sta_vht_cap->vht_mcs.tx_mcs_map = tx_map; + if (rx_nss > 0) { + TRACEOK("VHT rx_nss = max(%d, %d)", rx_nss, sta->deflink.rx_nss); + sta->deflink.rx_nss = MAX(rx_nss, sta->deflink.rx_nss); + } else { + sta->deflink.vht_cap.vht_supported = false; + return; } - if (rx_nss > 0) - sta->deflink.rx_nss = rx_nss; switch (sta->deflink.vht_cap.cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) { case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: @@ -642,18 +686,18 @@ lkpi_sta_sync_from_ni(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_node *ni, bool updchnctx) { -#if defined(LKPI_80211_HT) - lkpi_sta_sync_ht_from_ni(vif, sta, ni); -#endif -#if defined(LKPI_80211_VHT) - lkpi_sta_sync_vht_from_ni(vif, sta, ni); -#endif - /* * Ensure rx_nss is at least 1 as otherwise drivers run into * unexpected problems. */ - sta->deflink.rx_nss = MAX(1, sta->deflink.rx_nss); + sta->deflink.rx_nss = 1; + +#if defined(LKPI_80211_HT) + lkpi_sta_sync_ht_from_ni(hw, vif, sta, ni); +#endif +#if defined(LKPI_80211_VHT) + lkpi_sta_sync_vht_from_ni(hw, vif, sta, ni); +#endif /* * We are also called from node allocation which net80211 @@ -6237,7 +6281,6 @@ lkpi_ic_getradiocaps_ht(struct ieee80211com *ic, struct ieee80211_hw *hw, #endif IMPROVE("PS, ampdu_*, ht_cap.mcs.tx_params, ..."); - ic->ic_htcaps |= IEEE80211_HTCAP_SMPS_OFF; /* Only add HT40 channels if supported. */ if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) != 0 &&
