/****************************************************************************** * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, * USA * * The full GNU General Public License is included in this distribution * in the file called COPYING. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *****************************************************************************/ #include "iwl-trans.h" #include "mvm.h" #include "fw-api.h" /* * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler * * Copies the phy information in mvm->last_phy_info, it will be used when the * actual data will come from the fw in the next packet. */ int iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { struct iwl_rx_packet *pkt = rxb_addr(rxb); memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info)); mvm->ampdu_ref++; #ifdef CONFIG_IWLWIFI_DEBUGFS if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { spin_lock(&mvm->drv_stats_lock); mvm->drv_rx_stats.ampdu_count++; spin_unlock(&mvm->drv_stats_lock); } #endif return 0; } /* * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211 * * Adds the rxb to a new skb and give it to mac80211 */ static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_hdr *hdr, u16 len, u32 ampdu_status, u8 crypt_len, struct iwl_rx_cmd_buffer *rxb) { unsigned int hdrlen, fraglen; /* If frame is small enough to fit in skb->head, pull it completely. * If not, only pull ieee80211_hdr (including crypto if present, and * an additional 8 bytes for SNAP/ethertype, see below) so that * splice() or TCP coalesce are more efficient. * * Since, in addition, ieee80211_data_to_8023() always pull in at * least 8 bytes (possibly more for mesh) we can do the same here * to save the cost of doing it later. That still doesn't pull in * the actual IP header since the typical case has a SNAP header. * If the latter changes (there are efforts in the standards group * to do so) we should revisit this and ieee80211_data_to_8023(). */ hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr) + crypt_len + 8; memcpy(skb_put(skb, hdrlen), hdr, hdrlen); fraglen = len - hdrlen; if (fraglen) { int offset = (void *)hdr + hdrlen - rxb_addr(rxb) + rxb_offset(rxb); skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, fraglen, rxb->truesize); } ieee80211_rx(mvm->hw, skb); } /* * iwl_mvm_get_signal_strength - use new rx PHY INFO API * values are reported by the fw as positive values - need to negate * to obtain their dBM. Account for missing antennas by replacing 0 * values by -256dBm: practically 0 power and a non-feasible 8 bit value. */ static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, struct iwl_rx_phy_info *phy_info, struct ieee80211_rx_status *rx_status) { int energy_a, energy_b, energy_c, max_energy; u32 val; val = le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> IWL_RX_INFO_ENERGY_ANT_A_POS; energy_a = energy_a ? -energy_a : S8_MIN; energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> IWL_RX_INFO_ENERGY_ANT_B_POS; energy_b = energy_b ? -energy_b : S8_MIN; energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> IWL_RX_INFO_ENERGY_ANT_C_POS; energy_c = energy_c ? -energy_c : S8_MIN; max_energy = max(energy_a, energy_b); max_energy = max(max_energy, energy_c); IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", energy_a, energy_b, energy_c, max_energy); rx_status->signal = max_energy; rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA) >> RX_RES_PHY_FLAGS_ANTENNA_POS; rx_status->chain_signal[0] = energy_a; rx_status->chain_signal[1] = energy_b; rx_status->chain_signal[2] = energy_c; } /* * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format * @mvm: the mvm object * @hdr: 80211 header * @stats: status in mac80211's format * @rx_pkt_status: status coming from fw * * returns non 0 value if the packet should be dropped */ static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr, struct ieee80211_rx_status *stats, u32 rx_pkt_status, u8 *crypt_len) { if (!ieee80211_has_protected(hdr->frame_control) || (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == RX_MPDU_RES_STATUS_SEC_NO_ENC) return 0; /* packet was encrypted with unknown alg */ if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == RX_MPDU_RES_STATUS_SEC_ENC_ERR) return 0; switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { case RX_MPDU_RES_STATUS_SEC_CCM_ENC: /* alg is CCM: check MIC only */ if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) return -1; stats->flag |= RX_FLAG_DECRYPTED; IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n"); *crypt_len = IEEE80211_CCMP_HDR_LEN; return 0; case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: /* Don't drop the frame and decrypt it in SW */ if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) return 0; *crypt_len = IEEE80211_TKIP_IV_LEN; /* fall through if TTAK OK */ case RX_MPDU_RES_STATUS_SEC_WEP_ENC: if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) return -1; stats->flag |= RX_FLAG_DECRYPTED; if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == RX_MPDU_RES_STATUS_SEC_WEP_ENC) *crypt_len = IEEE80211_WEP_IV_LEN; return 0; case RX_MPDU_RES_STATUS_SEC_EXT_ENC: if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) return -1; stats->flag |= RX_FLAG_DECRYPTED; return 0; default: IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); } return 0; } /* * 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; struct ieee80211_sta *sta; struct sk_buff *skb; u32 len; u32 ampdu_status; u32 rate_n_flags; u32 rx_pkt_status; u8 crypt_len = 0; 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)); /* 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 0; } rx_status = IEEE80211_SKB_RXCB(skb); /* * 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, &crypt_len)) { IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", rx_pkt_status); kfree_skb(skb); 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); kfree_skb(skb); 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;*/ iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, (unsigned long long)rx_status->mactime); rcu_read_lock(); /* * We have tx blocked stations (with CS bit). If we heard frames from * a blocked station on a new channel we can TX to it again. */ if (unlikely(mvm->csa_tx_block_bcn_timeout)) { sta = ieee80211_find_sta( rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2); if (sta) iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false); } /* This is fine since we don't support multiple AP interfaces */ sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); if (sta) { struct iwl_mvm_sta *mvmsta; mvmsta = iwl_mvm_sta_from_mac80211(sta); rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); } rcu_read_unlock(); /* 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->vht_flag |= RX_VHT_FLAG_80MHZ; break; case RATE_MCS_CHAN_WIDTH_160: rx_status->vht_flag |= RX_VHT_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_LDPC_MSK) rx_status->flag |= RX_FLAG_LDPC; if (rate_n_flags & RATE_MCS_HT_MSK) { u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >> RATE_MCS_STBC_POS; rx_status->flag |= RX_FLAG_HT; rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; } else if (rate_n_flags & RATE_MCS_VHT_MSK) { u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >> RATE_MCS_STBC_POS; 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; rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; if (rate_n_flags & RATE_MCS_BF_MSK) rx_status->vht_flag |= RX_VHT_FLAG_BF; } else { rx_status->rate_idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, rx_status->band); } #ifdef CONFIG_IWLWIFI_DEBUGFS iwl_mvm_update_frame_stats(mvm, rate_n_flags, rx_status->flag & RX_FLAG_AMPDU_DETAILS); #endif iwl_mvm_pass_packet_to_mac80211(mvm, skb, hdr, len, ampdu_status, crypt_len, rxb); return 0; } static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm, struct mvm_statistics_rx *rx_stats) { lockdep_assert_held(&mvm->mutex); mvm->rx_stats = *rx_stats; } struct iwl_mvm_stat_data { struct iwl_mvm *mvm; __le32 mac_id; __s8 beacon_filter_average_energy; struct mvm_statistics_general_v8 *general; }; static void iwl_mvm_stat_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_mvm_stat_data *data = _data; struct iwl_mvm *mvm = data->mvm; int sig = -data->beacon_filter_average_energy; int last_event; int thold = vif->bss_conf.cqm_rssi_thold; int hyst = vif->bss_conf.cqm_rssi_hyst; u16 id = le32_to_cpu(data->mac_id); struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); /* This doesn't need the MAC ID check since it's not taking the * data copied into the "data" struct, but rather the data from * the notification directly. */ if (data->general) { mvmvif->beacon_stats.num_beacons = le32_to_cpu(data->general->beacon_counter[mvmvif->id]); mvmvif->beacon_stats.avg_signal = -data->general->beacon_average_energy[mvmvif->id]; } if (mvmvif->id != id) return; if (vif->type != NL80211_IFTYPE_STATION) return; mvmvif->bf_data.ave_beacon_signal = sig; /* BT Coex */ if (mvmvif->bf_data.bt_coex_min_thold != mvmvif->bf_data.bt_coex_max_thold) { last_event = mvmvif->bf_data.last_bt_coex_event; if (sig > mvmvif->bf_data.bt_coex_max_thold && (last_event <= mvmvif->bf_data.bt_coex_min_thold || last_event == 0)) { mvmvif->bf_data.last_bt_coex_event = sig; IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", sig); iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); } else if (sig < mvmvif->bf_data.bt_coex_min_thold && (last_event >= mvmvif->bf_data.bt_coex_max_thold || last_event == 0)) { mvmvif->bf_data.last_bt_coex_event = sig; IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", sig); iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); } } if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) return; /* CQM Notification */ last_event = mvmvif->bf_data.last_cqm_event; if (thold && sig < thold && (last_event == 0 || sig < last_event - hyst)) { mvmvif->bf_data.last_cqm_event = sig; IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", sig); ieee80211_cqm_rssi_notify( vif, NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, GFP_KERNEL); } else if (sig > thold && (last_event == 0 || sig > last_event + hyst)) { mvmvif->bf_data.last_cqm_event = sig; IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", sig); ieee80211_cqm_rssi_notify( vif, NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, GFP_KERNEL); } } void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) { size_t v8_len = sizeof(struct iwl_notif_statistics_v8); size_t v10_len = sizeof(struct iwl_notif_statistics_v10); struct iwl_mvm_stat_data data = { .mvm = mvm, }; u32 temperature; if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_STATS_V10) { struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data; if (iwl_rx_packet_payload_len(pkt) != v10_len) goto invalid; temperature = le32_to_cpu(stats->general.radio_temperature); data.mac_id = stats->rx.general.mac_id; data.beacon_filter_average_energy = stats->general.beacon_filter_average_energy; iwl_mvm_update_rx_statistics(mvm, &stats->rx); mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time); mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time); mvm->radio_stats.on_time_rf = le64_to_cpu(stats->general.on_time_rf); mvm->radio_stats.on_time_scan = le64_to_cpu(stats->general.on_time_scan); data.general = &stats->general; } else { struct iwl_notif_statistics_v8 *stats = (void *)&pkt->data; if (iwl_rx_packet_payload_len(pkt) != v8_len) goto invalid; temperature = le32_to_cpu(stats->general.radio_temperature); data.mac_id = stats->rx.general.mac_id; data.beacon_filter_average_energy = stats->general.beacon_filter_average_energy; iwl_mvm_update_rx_statistics(mvm, &stats->rx); } /* Only handle rx statistics temperature changes if async temp * notifications are not supported */ if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_ASYNC_DTM)) iwl_mvm_tt_temp_changed(mvm, temperature); ieee80211_iterate_active_interfaces(mvm->hw, IEEE80211_IFACE_ITER_NORMAL, iwl_mvm_stat_iterator, &data); return; invalid: IWL_ERR(mvm, "received invalid statistics size (%d)!\n", iwl_rx_packet_payload_len(pkt)); } int iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); return 0; }