/* * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler * * Handles the actual data of the Rx packet from the fw */ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { struct ieee80211_hdr *hdr; struct ieee80211_rx_status rx_status = {}; struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_rx_phy_info *phy_info; struct iwl_rx_mpdu_res_start *rx_res; u32 len; u32 ampdu_status; u32 rate_n_flags; u32 rx_pkt_status; phy_info = &mvm->last_phy_info; rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); len = le16_to_cpu(rx_res->byte_count); rx_pkt_status = le32_to_cpup((__le32 *) (pkt->data + sizeof(*rx_res) + len)); memset(&rx_status, 0, sizeof(rx_status)); /* * drop the packet if it has failed being decrypted by HW */ if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) { IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", rx_pkt_status); return 0; } if ((unlikely(phy_info->cfg_phy_cnt > 20))) { IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n", phy_info->cfg_phy_cnt); return 0; } /* * Keep packets with CRC errors (and with overrun) for monitor mode * (otherwise the firmware discards them) but mark them as bad. */ if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); rx_status.flag |= RX_FLAG_FAILED_FCS_CRC; } /* This will be used in several places later */ rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); /* rx_status carries information about the packet to mac80211 */ rx_status.mactime = le64_to_cpu(phy_info->timestamp); rx_status.device_timestamp = le32_to_cpu(phy_info->system_timestamp); rx_status.band = (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; rx_status.freq = ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), rx_status.band); /* * TSF as indicated by the fw is at INA time, but mac80211 expects the * TSF at the beginning of the MPDU. */ /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/ if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_RX_ENERGY_API) iwl_mvm_get_signal_strength(mvm, phy_info, &rx_status); else iwl_mvm_calc_rssi(mvm, phy_info, &rx_status); IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status.signal, (unsigned long long)rx_status.mactime); /* set the preamble flag if appropriate */ if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) rx_status.flag |= RX_FLAG_SHORTPRE; if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { /* * We know which subframes of an A-MPDU belong * together since we get a single PHY response * from the firmware for all of them */ rx_status.flag |= RX_FLAG_AMPDU_DETAILS; rx_status.ampdu_reference = mvm->ampdu_ref; } /* Set up the HT phy flags */ switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { case RATE_MCS_CHAN_WIDTH_20: break; case RATE_MCS_CHAN_WIDTH_40: rx_status.flag |= RX_FLAG_40MHZ; break; case RATE_MCS_CHAN_WIDTH_80: rx_status.flag |= RX_FLAG_80MHZ; break; case RATE_MCS_CHAN_WIDTH_160: rx_status.flag |= RX_FLAG_160MHZ; break; } if (rate_n_flags & RATE_MCS_SGI_MSK) rx_status.flag |= RX_FLAG_SHORT_GI; if (rate_n_flags & RATE_HT_MCS_GF_MSK) rx_status.flag |= RX_FLAG_HT_GF; if (rate_n_flags & RATE_MCS_HT_MSK) { rx_status.flag |= RX_FLAG_HT; rx_status.rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; } else if (rate_n_flags & RATE_MCS_VHT_MSK) { rx_status.vht_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.flag |= RX_FLAG_VHT; } else {
/* * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler * * Handles the actual data of the Rx packet from the fw */ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { struct ieee80211_hdr *hdr; struct ieee80211_rx_status rx_status = {}; struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_rx_phy_info *phy_info; struct iwl_rx_mpdu_res_start *rx_res; u32 len; u32 ampdu_status; u32 rate_n_flags; u32 rx_pkt_status; phy_info = &mvm->last_phy_info; rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); len = le16_to_cpu(rx_res->byte_count); rx_pkt_status = le32_to_cpup((__le32 *) (pkt->data + sizeof(*rx_res) + len)); memset(&rx_status, 0, sizeof(rx_status)); /* * drop the packet if it has failed being decrypted by HW */ if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) { IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", rx_pkt_status); return 0; } if ((unlikely(phy_info->cfg_phy_cnt > 20))) { IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n", phy_info->cfg_phy_cnt); return 0; } if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); return 0; } /* This will be used in several places later */ rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); /* rx_status carries information about the packet to mac80211 */ rx_status.mactime = le64_to_cpu(phy_info->timestamp); rx_status.device_timestamp = le32_to_cpu(phy_info->system_timestamp); rx_status.band = (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; rx_status.freq = ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), rx_status.band); /* * TSF as indicated by the fw is at INA time, but mac80211 expects the * TSF at the beginning of the MPDU. */ /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/ /* Find max signal strength (dBm) among 3 antenna/receiver chains */ rx_status.signal = iwl_mvm_calc_rssi(mvm, phy_info); IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status.signal, (unsigned long long)rx_status.mactime); /* * "antenna number" * * It seems that the antenna field in the phy flags value * is actually a bit field. This is undefined by radiotap, * it wants an actual antenna number but I always get "7" * for most legacy frames I receive indicating that the * same frame was received on all three RX chains. * * I think this field should be removed in favor of a * new 802.11n radiotap field "RX chains" that is defined * as a bitmask. */ rx_status.antenna = (le16_to_cpu(phy_info->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA) >> RX_RES_PHY_FLAGS_ANTENNA_POS; /* set the preamble flag if appropriate */ if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) rx_status.flag |= RX_FLAG_SHORTPRE; if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { /* * We know which subframes of an A-MPDU belong * together since we get a single PHY response * from the firmware for all of them */ rx_status.flag |= RX_FLAG_AMPDU_DETAILS; rx_status.ampdu_reference = mvm->ampdu_ref; } /* Set up the HT phy flags */ switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { case RATE_MCS_CHAN_WIDTH_20: break; case RATE_MCS_CHAN_WIDTH_40: rx_status.flag |= RX_FLAG_40MHZ; break; case RATE_MCS_CHAN_WIDTH_80: rx_status.flag |= RX_FLAG_80MHZ; break; case RATE_MCS_CHAN_WIDTH_160: rx_status.flag |= RX_FLAG_160MHZ; break; } if (rate_n_flags & RATE_MCS_SGI_MSK) rx_status.flag |= RX_FLAG_SHORT_GI; if (rate_n_flags & RATE_HT_MCS_GF_MSK) rx_status.flag |= RX_FLAG_HT_GF; if (rate_n_flags & RATE_MCS_HT_MSK) { rx_status.flag |= RX_FLAG_HT; rx_status.rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; } else if (rate_n_flags & RATE_MCS_VHT_MSK) { rx_status.vht_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.flag |= RX_FLAG_VHT; } else {