From: Naftali Goldstein Date: Wed, 22 Aug 2018 09:18:19 +0000 (+0300) Subject: iwlwifi: mvm: fix setting HE ppe FW config X-Git-Tag: v4.19.21~128 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=394f925664bd3516c511fe3ee3be3afc682183ad;p=platform%2Fkernel%2Flinux-rpi.git iwlwifi: mvm: fix setting HE ppe FW config [ Upstream commit 189b8d441b0f7825f0b4278851c52afaa0515ed2 ] The FW expects to get the ppe value for each NSS-BW pair in the same format as in the he phy capabilities IE, which means that a value of 0 implies ppe should be used for BPSK (mcs 0). If there are no PPE thresholds in the IE, or if for some NSS-RU pair there's no threshold set for it (this could happen because it's a variable-sized field), it means no PPE should not be used for that pair, so the value sent to FW should be 7 which corresponds to "none". Fixes: 514c30696fbc ("iwlwifi: add support for IEEE802.11ax") Signed-off-by: Naftali Goldstein Signed-off-by: Luca Coelho Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/mac.h b/drivers/net/wireless/intel/iwlwifi/fw/api/mac.h index 55594c9..47dbd2d 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/api/mac.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/api/mac.h @@ -442,7 +442,7 @@ struct iwl_he_backoff_conf { * Support for Nss x BW (or RU) matrix: * (0=SISO, 1=MIMO2) x (0-20MHz, 1-40MHz, 2-80MHz, 3-160MHz) * Each entry contains 2 QAM thresholds for 8us and 16us: - * 0=BPSK, 1=QPSK, 2=16QAM, 3=64QAM, 4=256QAM, 5=1024QAM, 6/7=RES + * 0=BPSK, 1=QPSK, 2=16QAM, 3=64QAM, 4=256QAM, 5=1024QAM, 6=RES, 7=NONE * i.e. QAM_th1 < QAM_th2 such if TX uses QAM_tx: * QAM_tx < QAM_th1 --> PPE=0us * QAM_th1 <= QAM_tx < QAM_th2 --> PPE=8us diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index 9a764af..0f357e8 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -1997,7 +1997,13 @@ static void iwl_mvm_cfg_he_sta(struct iwl_mvm *mvm, if (sta->he_cap.he_cap_elem.mac_cap_info[4] & IEEE80211_HE_MAC_CAP4_BQR) sta_ctxt_cmd.htc_flags |= cpu_to_le32(IWL_HE_HTC_BQR_SUPP); - /* If PPE Thresholds exist, parse them into a FW-familiar format */ + /* + * Initialize the PPE thresholds to "None" (7), as described in Table + * 9-262ac of 80211.ax/D3.0. + */ + memset(&sta_ctxt_cmd.pkt_ext, 7, sizeof(sta_ctxt_cmd.pkt_ext)); + + /* If PPE Thresholds exist, parse them into a FW-familiar format. */ if (sta->he_cap.he_cap_elem.phy_cap_info[6] & IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) { u8 nss = (sta->he_cap.ppe_thres[0] &