From bf9dfedaad9e65f2f580d3a573401d521d48b932 Mon Sep 17 00:00:00 2001 From: Shaul Triebitz Date: Mon, 23 Jul 2018 11:40:30 +0300 Subject: iwlwifi: mvm: handle RX no data notification Handle RX no data notification, which is used for advertising NDP to radiotap. Signed-off-by: Golan Ben Ami Signed-off-by: Shaul Triebitz Signed-off-by: Luca Coelho Signed-off-by: Kalle Valo --- .../net/wireless/intel/iwlwifi/fw/api/datapath.h | 5 + drivers/net/wireless/intel/iwlwifi/fw/api/rx.h | 49 ++++++++ drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 2 + drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 2 + drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 126 ++++++++++++++++++++- 5 files changed, 183 insertions(+), 1 deletion(-) (limited to 'drivers/net/wireless') diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h index eff3249af48a..fdc54a5dc9de 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h @@ -104,6 +104,11 @@ enum iwl_data_path_subcmd_ids { */ HE_AIR_SNIFFER_CONFIG_CMD = 0x13, + /** + * @RX_NO_DATA_NOTIF: &struct iwl_rx_no_data + */ + RX_NO_DATA_NOTIF = 0xF5, + /** * @TLC_MNG_UPDATE_NOTIF: &struct iwl_tlc_update_notif */ diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/rx.h b/drivers/net/wireless/intel/iwlwifi/fw/api/rx.h index 8961227ff44d..0791a854fc8f 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/api/rx.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/api/rx.h @@ -697,6 +697,55 @@ struct iwl_rx_mpdu_desc { #define IWL_CD_STTS_WIFI_STATUS_POS 4 #define IWL_CD_STTS_WIFI_STATUS_MSK 0xF0 +#define RX_NO_DATA_CHAIN_A_POS 0 +#define RX_NO_DATA_CHAIN_A_MSK (0xff << RX_NO_DATA_CHAIN_A_POS) +#define RX_NO_DATA_CHAIN_B_POS 8 +#define RX_NO_DATA_CHAIN_B_MSK (0xff << RX_NO_DATA_CHAIN_B_POS) +#define RX_NO_DATA_CHANNEL_POS 16 +#define RX_NO_DATA_CHANNEL_MSK (0xff << RX_NO_DATA_CHANNEL_POS) + +#define RX_NO_DATA_INFO_TYPE_POS 0 +#define RX_NO_DATA_INFO_TYPE_MSK (0xff << RX_NO_DATA_INFO_TYPE_POS) +#define RX_NO_DATA_INFO_TYPE_NONE 0 +#define RX_NO_DATA_INFO_TYPE_RX_ERR 1 +#define RX_NO_DATA_INFO_TYPE_NDP 2 +#define RX_NO_DATA_INFO_TYPE_MU_UNMATCHED 3 +#define RX_NO_DATA_INFO_TYPE_HE_TB_UNMATCHED 4 + +#define RX_NO_DATA_INFO_ERR_POS 8 +#define RX_NO_DATA_INFO_ERR_MSK (0xff << RX_NO_DATA_INFO_ERR_POS) +#define RX_NO_DATA_INFO_ERR_NONE 0 +#define RX_NO_DATA_INFO_ERR_BAD_PLCP 1 +#define RX_NO_DATA_INFO_ERR_UNSUPPORTED_RATE 2 +#define RX_NO_DATA_INFO_ERR_NO_DELIM 3 +#define RX_NO_DATA_INFO_ERR_BAD_MAC_HDR 4 + +#define RX_NO_DATA_FRAME_TIME_POS 0 +#define RX_NO_DATA_FRAME_TIME_MSK (0xfffff << RX_NO_DATA_FRAME_TIME_POS) + +/** + * struct iwl_rx_no_data - RX no data descriptor + * @info: 7:0 frame type, 15:8 RX error type + * @rssi: 7:0 energy chain-A, + * 15:8 chain-B, measured at FINA time (FINA_ENERGY), 16:23 channel + * @on_air_rise_time: GP2 during on air rise + * @fr_time: frame time + * @rate: rate/mcs of frame + * @phy_info: &enum iwl_rx_phy_data0 and &enum iwl_rx_phy_info_type + * @rx_vec: DW-12:9 raw RX vectors from DSP according to modulation type. + * for VHT: OFDM_RX_VECTOR_SIGA1_OUT, OFDM_RX_VECTOR_SIGA2_OUT + * for HE: OFDM_RX_VECTOR_HE_SIGA1_OUT, OFDM_RX_VECTOR_HE_SIGA2_OUT + */ +struct iwl_rx_no_data { + __le32 info; + __le32 rssi; + __le32 on_air_rise_time; + __le32 fr_time; + __le32 rate; + __le32 phy_info[2]; + __le32 rx_vec[3]; +} __packed; /* RX_NO_DATA_NTFY_API_S_VER_1 */ + /** * enum iwl_completion_desc_transfer_status - transfer status (bits 1-3) * @IWL_CD_STTS_UNUSED: unused diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h index 707bc7d1f37f..1aa690e081ff 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h @@ -1556,6 +1556,8 @@ void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, struct iwl_rx_cmd_buffer *rxb); void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, struct iwl_rx_cmd_buffer *rxb, int queue); +void iwl_mvm_rx_monitor_ndp(struct iwl_mvm *mvm, struct napi_struct *napi, + struct iwl_rx_cmd_buffer *rxb, int queue); void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, struct iwl_rx_cmd_buffer *rxb, int queue); int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask, diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c index a31dc99b63f7..30c5127034a0 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c @@ -1073,6 +1073,8 @@ static void iwl_mvm_rx_mq(struct iwl_op_mode *op_mode, iwl_mvm_rx_queue_notif(mvm, rxb, 0); else if (cmd == WIDE_ID(LEGACY_GROUP, FRAME_RELEASE)) iwl_mvm_rx_frame_release(mvm, napi, rxb, 0); + else if (cmd == WIDE_ID(DATA_PATH_GROUP, RX_NO_DATA_NOTIF)) + iwl_mvm_rx_monitor_ndp(mvm, napi, rxb, 0); else iwl_mvm_rx_common(mvm, rxb, pkt); } diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c index 8b014456e6d8..7bd8676508f5 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c @@ -200,7 +200,8 @@ static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, { struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); - if (iwl_mvm_check_pn(mvm, skb, queue, sta)) { + if (!(rx_status->flag & RX_FLAG_NO_PSDU) && + iwl_mvm_check_pn(mvm, skb, queue, sta)) { kfree_skb(skb); } else { unsigned int radiotap_len = 0; @@ -1606,6 +1607,129 @@ out: rcu_read_unlock(); } +void iwl_mvm_rx_monitor_ndp(struct iwl_mvm *mvm, struct napi_struct *napi, + struct iwl_rx_cmd_buffer *rxb, int queue) +{ + struct ieee80211_rx_status *rx_status; + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_rx_no_data *desc = (void *)pkt->data; + u32 rate_n_flags = le32_to_cpu(desc->rate); + u32 gp2_on_air_rise = le32_to_cpu(desc->on_air_rise_time); + u32 rssi = le32_to_cpu(desc->rssi); + u32 info_type = le32_to_cpu(desc->info) & RX_NO_DATA_INFO_TYPE_MSK; + u16 phy_info = IWL_RX_MPDU_PHY_TSF_OVERLOAD; + struct ieee80211_sta *sta = NULL; + struct sk_buff *skb; + u8 channel, energy_a, energy_b; + struct iwl_mvm_rx_phy_data phy_data = { + .d0 = desc->phy_info[0], + .info_type = IWL_RX_PHY_INFO_TYPE_NONE, + }; + + if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) + return; + + /* Currently only NDP type is supported */ + if (info_type != RX_NO_DATA_INFO_TYPE_NDP) + return; + + energy_a = (rssi & RX_NO_DATA_CHAIN_A_MSK) >> RX_NO_DATA_CHAIN_A_POS; + energy_b = (rssi & RX_NO_DATA_CHAIN_B_MSK) >> RX_NO_DATA_CHAIN_B_POS; + channel = (rssi & RX_NO_DATA_CHANNEL_MSK) >> RX_NO_DATA_CHANNEL_POS; + + phy_data.info_type = + le32_get_bits(desc->phy_info[1], + IWL_RX_PHY_DATA1_INFO_TYPE_MASK); + + /* Dont use dev_alloc_skb(), we'll have enough headroom once + * ieee80211_hdr pulled. + */ + skb = alloc_skb(128, GFP_ATOMIC); + if (!skb) { + IWL_ERR(mvm, "alloc_skb failed\n"); + return; + } + + rx_status = IEEE80211_SKB_RXCB(skb); + + /* 0-length PSDU */ + rx_status->flag |= RX_FLAG_NO_PSDU; + /* currently this is the only type for which we get this notif */ + rx_status->zero_length_psdu_type = + IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING; + + /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ + switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { + case RATE_MCS_CHAN_WIDTH_20: + break; + case RATE_MCS_CHAN_WIDTH_40: + rx_status->bw = RATE_INFO_BW_40; + break; + case RATE_MCS_CHAN_WIDTH_80: + rx_status->bw = RATE_INFO_BW_80; + break; + case RATE_MCS_CHAN_WIDTH_160: + rx_status->bw = RATE_INFO_BW_160; + break; + } + + if (rate_n_flags & RATE_MCS_HE_MSK) + iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, + phy_info, queue); + + iwl_mvm_decode_lsig(skb, &phy_data); + + rx_status->device_timestamp = gp2_on_air_rise; + rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : + NL80211_BAND_2GHZ; + rx_status->freq = ieee80211_channel_to_frequency(channel, + rx_status->band); + iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, + energy_b); + + rcu_read_lock(); + + if (!(rate_n_flags & RATE_MCS_CCK_MSK) && + rate_n_flags & RATE_MCS_SGI_MSK) + rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; + if (rate_n_flags & RATE_HT_MCS_GF_MSK) + rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; + if (rate_n_flags & RATE_MCS_LDPC_MSK) + rx_status->enc_flags |= RX_ENC_FLAG_LDPC; + if (rate_n_flags & RATE_MCS_HT_MSK) { + u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> + RATE_MCS_STBC_POS; + rx_status->encoding = RX_ENC_HT; + rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; + rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; + } else if (rate_n_flags & RATE_MCS_VHT_MSK) { + u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> + RATE_MCS_STBC_POS; + rx_status->nss = + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> + RATE_VHT_MCS_NSS_POS) + 1; + rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; + rx_status->encoding = RX_ENC_VHT; + 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)) { + int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, + rx_status->band); + + if (WARN(rate < 0 || rate > 0xFF, + "Invalid rate flags 0x%x, band %d,\n", + rate_n_flags, rx_status->band)) { + kfree_skb(skb); + goto out; + } + rx_status->rate_idx = rate; + } + + iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta); +out: + rcu_read_unlock(); +} void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, struct iwl_rx_cmd_buffer *rxb, int queue) { -- cgit v1.2.3