| /****************************************************************************** |
| * |
| * 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 |
| * Copyright(c) 2016 - 2017 Intel Deutschland GmbH |
| * Copyright(c) 2018 - 2020 Intel Corporation |
| * |
| * 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. |
| * |
| * The full GNU General Public License is included in this distribution |
| * in the file called COPYING. |
| * |
| * Contact Information: |
| * Intel Linux Wireless <linuxwifi@intel.com> |
| * 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 |
| * Copyright(c) 2016 - 2017 Intel Deutschland GmbH |
| * Copyright(c) 2018 - 2020 Intel Corporation |
| * 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 <asm/unaligned.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| #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. |
| */ |
| void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
| { |
| 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 |
| } |
| |
| /* |
| * 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 ieee80211_sta *sta, |
| struct napi_struct *napi, |
| struct sk_buff *skb, |
| struct ieee80211_hdr *hdr, u16 len, |
| u8 crypt_len, |
| struct iwl_rx_cmd_buffer *rxb) |
| { |
| unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); |
| unsigned int fraglen; |
| |
| /* |
| * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len, |
| * but those are all multiples of 4 long) all goes away, but we |
| * want the *end* of it, which is going to be the start of the IP |
| * header, to be aligned when it gets pulled in. |
| * The beginning of the skb->data is aligned on at least a 4-byte |
| * boundary after allocation. Everything here is aligned at least |
| * on a 2-byte boundary so we can just take hdrlen & 3 and pad by |
| * the result. |
| */ |
| skb_reserve(skb, hdrlen & 3); |
| |
| /* 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 : hdrlen + crypt_len + 8; |
| |
| skb_put_data(skb, 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_napi(mvm->hw, sta, skb, napi); |
| } |
| |
| /* |
| * 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; |
| *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 (!fw_has_api(&mvm->fw->ucode_capa, |
| IWL_UCODE_TLV_API_DEPRECATE_TTAK) && |
| !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) |
| return 0; |
| *crypt_len = IEEE80211_TKIP_IV_LEN; |
| /* fall through */ |
| |
| 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: |
| /* Expected in monitor (not having the keys) */ |
| if (!mvm->monitor_on) |
| IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); |
| } |
| |
| return 0; |
| } |
| |
| static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm, |
| struct ieee80211_sta *sta, |
| struct ieee80211_hdr *hdr, u32 len, |
| struct iwl_rx_phy_info *phy_info, |
| u32 rate_n_flags) |
| { |
| struct iwl_mvm_sta *mvmsta; |
| struct iwl_mvm_tcm_mac *mdata; |
| int mac; |
| int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */ |
| struct iwl_mvm_vif *mvmvif; |
| /* expected throughput in 100Kbps, single stream, 20 MHz */ |
| static const u8 thresh_tpt[] = { |
| 9, 18, 30, 42, 60, 78, 90, 96, 120, 135, |
| }; |
| u16 thr; |
| |
| if (ieee80211_is_data_qos(hdr->frame_control)) |
| ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)]; |
| |
| mvmsta = iwl_mvm_sta_from_mac80211(sta); |
| mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; |
| |
| if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) |
| schedule_delayed_work(&mvm->tcm.work, 0); |
| mdata = &mvm->tcm.data[mac]; |
| mdata->rx.pkts[ac]++; |
| |
| /* count the airtime only once for each ampdu */ |
| if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) { |
| mdata->rx.last_ampdu_ref = mvm->ampdu_ref; |
| mdata->rx.airtime += le16_to_cpu(phy_info->frame_time); |
| } |
| |
| if (!(rate_n_flags & (RATE_MCS_HT_MSK | RATE_MCS_VHT_MSK))) |
| return; |
| |
| mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); |
| |
| if (mdata->opened_rx_ba_sessions || |
| mdata->uapsd_nonagg_detect.detected || |
| (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd && |
| !mvmvif->queue_params[IEEE80211_AC_VI].uapsd && |
| !mvmvif->queue_params[IEEE80211_AC_BE].uapsd && |
| !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) || |
| mvmsta->sta_id != mvmvif->ap_sta_id) |
| return; |
| |
| if (rate_n_flags & RATE_MCS_HT_MSK) { |
| thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK]; |
| thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK) >> |
| RATE_HT_MCS_NSS_POS); |
| } else { |
| if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >= |
| ARRAY_SIZE(thresh_tpt))) |
| return; |
| thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK]; |
| thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> |
| RATE_VHT_MCS_NSS_POS); |
| } |
| |
| thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) >> |
| RATE_MCS_CHAN_WIDTH_POS); |
| |
| mdata->uapsd_nonagg_detect.rx_bytes += len; |
| ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr); |
| } |
| |
| static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, |
| struct sk_buff *skb, |
| u32 status) |
| { |
| struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
| struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); |
| |
| if (mvmvif->features & NETIF_F_RXCSUM && |
| status & RX_MPDU_RES_STATUS_CSUM_DONE && |
| status & RX_MPDU_RES_STATUS_CSUM_OK) |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| } |
| |
| /* |
| * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler |
| * |
| * Handles the actual data of the Rx packet from the fw |
| */ |
| void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, |
| struct iwl_rx_cmd_buffer *rxb) |
| { |
| 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 = NULL; |
| struct sk_buff *skb; |
| u32 len; |
| 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 = get_unaligned_le32((__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; |
| } |
| |
| 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; |
| } |
| |
| /* |
| * 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)) ? |
| NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; |
| rx_status->freq = |
| ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), |
| rx_status->band); |
| |
| /* TSF as indicated by the firmware is at INA time */ |
| rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; |
| |
| 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(); |
| if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { |
| u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; |
| |
| id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; |
| |
| if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { |
| sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); |
| if (IS_ERR(sta)) |
| sta = NULL; |
| } |
| } else if (!is_multicast_ether_addr(hdr->addr2)) { |
| /* This is fine since we prevent two stations with the same |
| * address from being added. |
| */ |
| sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); |
| } |
| |
| if (sta) { |
| struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
| struct ieee80211_vif *tx_blocked_vif = |
| rcu_dereference(mvm->csa_tx_blocked_vif); |
| struct iwl_fw_dbg_trigger_tlv *trig; |
| struct ieee80211_vif *vif = mvmsta->vif; |
| |
| /* 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(tx_blocked_vif) && vif == tx_blocked_vif) { |
| struct iwl_mvm_vif *mvmvif = |
| iwl_mvm_vif_from_mac80211(tx_blocked_vif); |
| |
| if (mvmvif->csa_target_freq == rx_status->freq) |
| iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, |
| false); |
| } |
| |
| rs_update_last_rssi(mvm, mvmsta, rx_status); |
| |
| trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, |
| ieee80211_vif_to_wdev(vif), |
| FW_DBG_TRIGGER_RSSI); |
| |
| if (trig && ieee80211_is_beacon(hdr->frame_control)) { |
| struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; |
| s32 rssi; |
| |
| rssi_trig = (void *)trig->data; |
| rssi = le32_to_cpu(rssi_trig->rssi); |
| |
| if (rx_status->signal < rssi) |
| iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, |
| NULL); |
| } |
| |
| if (!mvm->tcm.paused && len >= sizeof(*hdr) && |
| !is_multicast_ether_addr(hdr->addr1) && |
| ieee80211_is_data(hdr->frame_control)) |
| iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info, |
| rate_n_flags); |
| |
| if (ieee80211_is_data(hdr->frame_control)) |
| iwl_mvm_rx_csum(sta, skb, rx_pkt_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->enc_flags |= RX_ENC_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->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_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 { |
| 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); |
| return; |
| } |
| rx_status->rate_idx = rate; |
| } |
| |
| #ifdef CONFIG_IWLWIFI_DEBUGFS |
| iwl_mvm_update_frame_stats(mvm, rate_n_flags, |
| rx_status->flag & RX_FLAG_AMPDU_DETAILS); |
| #endif |
| |
| if (unlikely((ieee80211_is_beacon(hdr->frame_control) || |
| ieee80211_is_probe_resp(hdr->frame_control)) && |
| mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) |
| mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; |
| |
| if (unlikely(ieee80211_is_beacon(hdr->frame_control) || |
| ieee80211_is_probe_resp(hdr->frame_control))) |
| rx_status->boottime_ns = ktime_get_boottime_ns(); |
| |
| iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, |
| crypt_len, rxb); |
| } |
| |
| struct iwl_mvm_stat_data { |
| struct iwl_mvm *mvm; |
| __le32 flags; |
| __le32 mac_id; |
| u8 beacon_filter_average_energy; |
| void *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); |
| u16 vif_id = mvmvif->id; |
| |
| /* 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 (iwl_mvm_has_new_rx_stats_api(mvm)) { |
| struct mvm_statistics_general *general = |
| data->general; |
| |
| mvmvif->beacon_stats.num_beacons = |
| le32_to_cpu(general->beacon_counter[vif_id]); |
| mvmvif->beacon_stats.avg_signal = |
| -general->beacon_average_energy[vif_id]; |
| } else { |
| struct mvm_statistics_general_v8 *general = |
| data->general; |
| |
| mvmvif->beacon_stats.num_beacons = |
| le32_to_cpu(general->beacon_counter[vif_id]); |
| mvmvif->beacon_stats.avg_signal = |
| -general->beacon_average_energy[vif_id]; |
| } |
| |
| /* make sure that beacon statistics don't go backwards with TCM |
| * request to clear statistics |
| */ |
| if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) |
| mvmvif->beacon_stats.accu_num_beacons += |
| mvmvif->beacon_stats.num_beacons; |
| |
| if (mvmvif->id != id) |
| return; |
| |
| if (vif->type != NL80211_IFTYPE_STATION) |
| return; |
| |
| if (sig == 0) { |
| IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); |
| 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, |
| sig, |
| 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, |
| sig, |
| GFP_KERNEL); |
| } |
| } |
| |
| static inline void |
| iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) |
| { |
| struct iwl_fw_dbg_trigger_tlv *trig; |
| struct iwl_fw_dbg_trigger_stats *trig_stats; |
| u32 trig_offset, trig_thold; |
| |
| trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS); |
| if (!trig) |
| return; |
| |
| trig_stats = (void *)trig->data; |
| |
| trig_offset = le32_to_cpu(trig_stats->stop_offset); |
| trig_thold = le32_to_cpu(trig_stats->stop_threshold); |
| |
| if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) |
| return; |
| |
| if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) |
| return; |
| |
| iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); |
| } |
| |
| void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, |
| struct iwl_rx_packet *pkt) |
| { |
| struct iwl_mvm_stat_data data = { |
| .mvm = mvm, |
| }; |
| int expected_size; |
| int i; |
| u8 *energy; |
| __le32 *bytes; |
| __le32 *air_time; |
| __le32 flags; |
| |
| if (!iwl_mvm_has_new_rx_stats_api(mvm)) { |
| if (iwl_mvm_has_new_rx_api(mvm)) |
| expected_size = sizeof(struct iwl_notif_statistics_v11); |
| else |
| expected_size = sizeof(struct iwl_notif_statistics_v10); |
| } else { |
| expected_size = sizeof(struct iwl_notif_statistics); |
| } |
| |
| if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size, |
| "received invalid statistics size (%d)!\n", |
| iwl_rx_packet_payload_len(pkt))) |
| return; |
| |
| if (!iwl_mvm_has_new_rx_stats_api(mvm)) { |
| struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; |
| |
| data.mac_id = stats->rx.general.mac_id; |
| data.beacon_filter_average_energy = |
| stats->general.common.beacon_filter_average_energy; |
| |
| mvm->rx_stats_v3 = stats->rx; |
| |
| mvm->radio_stats.rx_time = |
| le64_to_cpu(stats->general.common.rx_time); |
| mvm->radio_stats.tx_time = |
| le64_to_cpu(stats->general.common.tx_time); |
| mvm->radio_stats.on_time_rf = |
| le64_to_cpu(stats->general.common.on_time_rf); |
| mvm->radio_stats.on_time_scan = |
| le64_to_cpu(stats->general.common.on_time_scan); |
| |
| data.general = &stats->general; |
| |
| flags = stats->flag; |
| } else { |
| struct iwl_notif_statistics *stats = (void *)&pkt->data; |
| |
| data.mac_id = stats->rx.general.mac_id; |
| data.beacon_filter_average_energy = |
| stats->general.common.beacon_filter_average_energy; |
| |
| mvm->rx_stats = stats->rx; |
| |
| mvm->radio_stats.rx_time = |
| le64_to_cpu(stats->general.common.rx_time); |
| mvm->radio_stats.tx_time = |
| le64_to_cpu(stats->general.common.tx_time); |
| mvm->radio_stats.on_time_rf = |
| le64_to_cpu(stats->general.common.on_time_rf); |
| mvm->radio_stats.on_time_scan = |
| le64_to_cpu(stats->general.common.on_time_scan); |
| |
| data.general = &stats->general; |
| |
| flags = stats->flag; |
| } |
| data.flags = flags; |
| |
| iwl_mvm_rx_stats_check_trigger(mvm, pkt); |
| |
| ieee80211_iterate_active_interfaces(mvm->hw, |
| IEEE80211_IFACE_ITER_NORMAL, |
| iwl_mvm_stat_iterator, |
| &data); |
| |
| if (!iwl_mvm_has_new_rx_api(mvm)) |
| return; |
| |
| if (!iwl_mvm_has_new_rx_stats_api(mvm)) { |
| struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; |
| |
| energy = (void *)&v11->load_stats.avg_energy; |
| bytes = (void *)&v11->load_stats.byte_count; |
| air_time = (void *)&v11->load_stats.air_time; |
| } else { |
| struct iwl_notif_statistics *stats = (void *)&pkt->data; |
| |
| energy = (void *)&stats->load_stats.avg_energy; |
| bytes = (void *)&stats->load_stats.byte_count; |
| air_time = (void *)&stats->load_stats.air_time; |
| } |
| |
| rcu_read_lock(); |
| for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { |
| struct iwl_mvm_sta *sta; |
| |
| if (!energy[i]) |
| continue; |
| |
| sta = iwl_mvm_sta_from_staid_rcu(mvm, i); |
| if (!sta) |
| continue; |
| sta->avg_energy = energy[i]; |
| } |
| rcu_read_unlock(); |
| |
| /* |
| * Don't update in case the statistics are not cleared, since |
| * we will end up counting twice the same airtime, once in TCM |
| * request and once in statistics notification. |
| */ |
| if (!(le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)) |
| return; |
| |
| spin_lock(&mvm->tcm.lock); |
| for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) { |
| struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i]; |
| u32 airtime = le32_to_cpu(air_time[i]); |
| u32 rx_bytes = le32_to_cpu(bytes[i]); |
| |
| mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes; |
| if (airtime) { |
| /* re-init every time to store rate from FW */ |
| ewma_rate_init(&mdata->uapsd_nonagg_detect.rate); |
| ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, |
| rx_bytes * 8 / airtime); |
| } |
| |
| mdata->rx.airtime += airtime; |
| } |
| spin_unlock(&mvm->tcm.lock); |
| } |
| |
| void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
| { |
| iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); |
| } |
| |
| void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, |
| struct iwl_rx_cmd_buffer *rxb) |
| { |
| struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| struct iwl_ba_window_status_notif *notif = (void *)pkt->data; |
| int i; |
| u32 pkt_len = iwl_rx_packet_payload_len(pkt); |
| |
| if (WARN_ONCE(pkt_len != sizeof(*notif), |
| "Received window status notification of wrong size (%u)\n", |
| pkt_len)) |
| return; |
| |
| rcu_read_lock(); |
| for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { |
| struct ieee80211_sta *sta; |
| u8 sta_id, tid; |
| u64 bitmap; |
| u32 ssn; |
| u16 ratid; |
| u16 received_mpdu; |
| |
| ratid = le16_to_cpu(notif->ra_tid[i]); |
| /* check that this TID is valid */ |
| if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) |
| continue; |
| |
| received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); |
| if (received_mpdu == 0) |
| continue; |
| |
| tid = ratid & BA_WINDOW_STATUS_TID_MSK; |
| /* get the station */ |
| sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) |
| >> BA_WINDOW_STATUS_STA_ID_POS; |
| sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); |
| if (IS_ERR_OR_NULL(sta)) |
| continue; |
| bitmap = le64_to_cpu(notif->bitmap[i]); |
| ssn = le32_to_cpu(notif->start_seq_num[i]); |
| |
| /* update mac80211 with the bitmap for the reordering buffer */ |
| ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, |
| received_mpdu); |
| } |
| rcu_read_unlock(); |
| } |