Return-path: Received: from paleale.coelho.fi ([176.9.41.70]:52022 "EHLO farmhouse.coelho.fi" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933886AbeF3InG (ORCPT ); Sat, 30 Jun 2018 04:43:06 -0400 From: Luca Coelho To: kvalo@codeaurora.org Cc: linux-wireless@vger.kernel.org, emmanuel.grumbach@intel.com, ilan.peer@intel.com, johannes@sipsolutions.net, liad.kaufman@intel.com, sara.sharon@intel.com, shaul.triebitz@intel.com, Luca Coelho Date: Sat, 30 Jun 2018 11:42:53 +0300 Message-Id: <20180630084253.30660-5-luca@coelho.fi> (sfid-20180630_104342_451379_48340E34) In-Reply-To: <20180630084253.30660-1-luca@coelho.fi> References: <20180630084253.30660-1-luca@coelho.fi> Subject: [PATCH v2 4/4] iwlwifi: mvm: add radiotap data for HE Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Luca Coelho Add HE information to the radiotap data. Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 169 +++++++++++++++++- 1 file changed, 163 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c index 0d66cb232cf1..d82eeb7e0de7 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c @@ -198,10 +198,20 @@ static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, struct sk_buff *skb, int queue, struct ieee80211_sta *sta) { - if (iwl_mvm_check_pn(mvm, skb, queue, sta)) + struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); + + if (iwl_mvm_check_pn(mvm, skb, queue, sta)) { kfree_skb(skb); - else + } else { + unsigned int radiotap_len = 0; + + if (rx_status->flag & RX_FLAG_RADIOTAP_HE) + radiotap_len += sizeof(struct ieee80211_radiotap_he); + if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU) + radiotap_len += sizeof(struct ieee80211_radiotap_he_mu); + __skb_push(skb, radiotap_len); ieee80211_rx_napi(mvm->hw, sta, skb, napi); + } } static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, @@ -859,6 +869,8 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, struct ieee80211_sta *sta = NULL; struct sk_buff *skb; u8 crypt_len = 0; + struct ieee80211_radiotap_he *he = NULL; + struct ieee80211_radiotap_he_mu *he_mu = NULL; u32 he_type = 0xffffffff; /* this is invalid e.g. because puncture type doesn't allow 0b11 */ #define HE_PHY_DATA_INVAL ((u64)-1) @@ -889,10 +901,43 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, rx_status = IEEE80211_SKB_RXCB(skb); if (rate_n_flags & RATE_MCS_HE_MSK) { - if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) + static const struct ieee80211_radiotap_he known = { + .data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | + IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | + IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN | + IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN), + .data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN | + IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN), + }; + static const struct ieee80211_radiotap_he_mu mu_known = { + .flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN | + IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN | + IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN | + IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN), + .flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN), + }; + unsigned int radiotap_len = 0; + + he = skb_put_data(skb, &known, sizeof(known)); + radiotap_len += sizeof(known); + rx_status->flag |= RX_FLAG_RADIOTAP_HE; + + he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK; + + if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) { he_phy_data = le64_to_cpu(desc->he_phy_data); - he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK; + + if (he_type == RATE_MCS_HE_TYPE_MU) { + he_mu = skb_put_data(skb, &mu_known, + sizeof(mu_known)); + radiotap_len += sizeof(mu_known); + rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU; + } + } + + /* temporarily hide the radiotap data */ + __skb_pull(skb, radiotap_len); } if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, phy_info, desc, @@ -921,6 +966,13 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, /* TSF as indicated by the firmware is at INA time */ rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; } else if (he_type == RATE_MCS_HE_TYPE_SU) { + he->data1 |= + cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN); + if (FIELD_GET(IWL_RX_HE_PHY_UPLINK, + le64_to_cpu(desc->he_phy_data))) + he->data3 |= + cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA3_UL_DL); + if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) { rx_status->ampdu_reference = mvm->ampdu_ref; mvm->ampdu_ref++; @@ -931,8 +983,28 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, le64_to_cpu(desc->he_phy_data))) rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; } + } else if (he_mu && he_phy_data != HE_PHY_DATA_INVAL) { + he_mu->flags1 |= + le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIBG_SYM_OR_USER_NUM_MASK, + he_phy_data), + IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS); + he_mu->flags1 |= + le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_DCM, + he_phy_data), + IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM); + he_mu->flags1 |= + le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_MCS_MASK, + he_phy_data), + IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS); + he_mu->flags2 |= + le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_COMPRESSION, + he_phy_data), + IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP); + he_mu->flags2 |= + le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_PREAMBLE_PUNC_TYPE_MASK, + he_phy_data), + IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW); } - rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise); rx_status->band = desc->channel > 14 ? NL80211_BAND_5GHZ : NL80211_BAND_2GHZ; @@ -1132,6 +1204,17 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996; break; } + he->data2 |= + le16_encode_bits(offs, + IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET); + he->data2 |= + cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN); + if (he_phy_data & IWL_RX_HE_PHY_RU_ALLOC_SEC80) + he->data2 |= + cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC); + } else if (he) { + he->data1 |= + cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); } if (!(rate_n_flags & RATE_MCS_CCK_MSK) && @@ -1158,7 +1241,7 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; if (rate_n_flags & RATE_MCS_BF_MSK) rx_status->enc_flags |= RX_ENC_FLAG_BF; - } else if (rate_n_flags & RATE_MCS_HE_MSK) { + } else if (he) { u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> RATE_MCS_STBC_POS; rx_status->nss = @@ -1173,6 +1256,20 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, rx_status->he_dcm = !!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK); +#define CHECK_TYPE(F) \ + BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F != \ + (RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS)) + + CHECK_TYPE(SU); + CHECK_TYPE(EXT_SU); + CHECK_TYPE(MU); + CHECK_TYPE(TRIG); + + he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS); + + if (rate_n_flags & RATE_MCS_BF_POS) + he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF); + switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >> RATE_MCS_HE_GI_LTF_POS) { case 0: @@ -1191,6 +1288,65 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; break; } + + switch (he_type) { + case RATE_MCS_HE_TYPE_SU: { + u16 val; + + /* LTF syms correspond to streams */ + he->data2 |= + cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN); + switch (rx_status->nss) { + case 1: + val = 0; + break; + case 2: + val = 1; + break; + case 3: + case 4: + val = 2; + break; + case 5: + case 6: + val = 3; + break; + case 7: + case 8: + val = 4; + break; + default: + WARN_ONCE(1, "invalid nss: %d\n", + rx_status->nss); + val = 0; + } + he->data5 |= + le16_encode_bits(val, + IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS); + } + break; + case RATE_MCS_HE_TYPE_MU: { + u16 val; + + if (he_phy_data == HE_PHY_DATA_INVAL) + break; + + val = FIELD_GET(IWL_RX_HE_PHY_HE_LTF_NUM_MASK, + le64_to_cpu(desc->he_phy_data)); + + he->data2 |= + cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN); + he->data5 |= + cpu_to_le16(FIELD_PREP( + IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS, + val)); + } + break; + case RATE_MCS_HE_TYPE_EXT_SU: + case RATE_MCS_HE_TYPE_TRIG: + /* not supported yet */ + break; + } } else { int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, rx_status->band); @@ -1202,6 +1358,7 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, goto out; } rx_status->rate_idx = rate; + } /* management stuff on default queue */ -- 2.18.0