/****************************************************************************** * * 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 #include #include "iwl-trans.h" #include "iwl-eeprom-parse.h" #include "mvm.h" #include "sta.h" #include "fw-dbg.h" static void iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, u16 tid, u16 ssn) { struct iwl_fw_dbg_trigger_tlv *trig; struct iwl_fw_dbg_trigger_ba *ba_trig; if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) return; trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); ba_trig = (void *)trig->data; if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) return; if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) return; iwl_mvm_fw_dbg_collect_trig(mvm, trig, "BAR sent to %pM, tid %d, ssn %d", addr, tid, ssn); } /* * Sets most of the Tx cmd's fields */ void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, struct iwl_tx_cmd *tx_cmd, struct ieee80211_tx_info *info, u8 sta_id) { struct ieee80211_hdr *hdr = (void *)skb->data; __le16 fc = hdr->frame_control; u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); u32 len = skb->len + FCS_LEN; u8 ac; if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) tx_flags |= TX_CMD_FLG_ACK; else tx_flags &= ~TX_CMD_FLG_ACK; if (ieee80211_is_probe_resp(fc)) tx_flags |= TX_CMD_FLG_TSF; if (ieee80211_has_morefrags(fc)) tx_flags |= TX_CMD_FLG_MORE_FRAG; if (ieee80211_is_data_qos(fc)) { u8 *qc = ieee80211_get_qos_ctl(hdr); tx_cmd->tid_tspec = qc[0] & 0xf; tx_flags &= ~TX_CMD_FLG_SEQ_CTL; } else if (ieee80211_is_back_req(fc)) { struct ieee80211_bar *bar = (void *)skb->data; u16 control = le16_to_cpu(bar->control); u16 ssn = le16_to_cpu(bar->start_seq_num); tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; tx_cmd->tid_tspec = (control & IEEE80211_BAR_CTRL_TID_INFO_MASK) >> IEEE80211_BAR_CTRL_TID_INFO_SHIFT; WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, ssn); } else { tx_cmd->tid_tspec = IWL_TID_NON_QOS; if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) tx_flags |= TX_CMD_FLG_SEQ_CTL; else tx_flags &= ~TX_CMD_FLG_SEQ_CTL; } /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; else ac = tid_to_mac80211_ac[0]; tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << TX_CMD_FLG_BT_PRIO_POS; if (ieee80211_is_mgmt(fc)) { if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); else if (ieee80211_is_action(fc)) tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); else tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); /* The spec allows Action frames in A-MPDU, we don't support * it */ WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); } else { tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); } if (ieee80211_is_data(fc) && len > mvm->rts_threshold && !is_multicast_ether_addr(ieee80211_get_DA(hdr))) tx_flags |= TX_CMD_FLG_PROT_REQUIRE; if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && ieee80211_action_contains_tpc(skb)) tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; tx_cmd->tx_flags = cpu_to_le32(tx_flags); /* Total # bytes to be transmitted */ tx_cmd->len = cpu_to_le16((u16)skb->len); tx_cmd->next_frame_len = 0; tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); tx_cmd->sta_id = sta_id; } /* * Sets the fields in the Tx cmd that are rate related */ void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, struct ieee80211_tx_info *info, struct ieee80211_sta *sta, __le16 fc) { u32 rate_flags; int rate_idx; u8 rate_plcp; /* Set retry limit on RTS packets */ tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; /* Set retry limit on DATA packets and Probe Responses*/ if (ieee80211_is_probe_resp(fc)) { tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; tx_cmd->rts_retry_limit = min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); } else if (ieee80211_is_back_req(fc)) { tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; } else { tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; } /* * for data packets, rate info comes from the table inside the fw. This * table is controlled by LINK_QUALITY commands */ if (ieee80211_is_data(fc) && sta) { tx_cmd->initial_rate_index = 0; tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); return; } else if (ieee80211_is_back_req(fc)) { tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); } /* HT rate doesn't make sense for a non data frame */ WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n", info->control.rates[0].flags, info->control.rates[0].idx, le16_to_cpu(fc)); rate_idx = info->control.rates[0].idx; /* if the rate isn't a well known legacy rate, take the lowest one */ if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY) rate_idx = rate_lowest_index( &mvm->nvm_data->bands[info->band], sta); /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ if (info->band == IEEE80211_BAND_5GHZ) rate_idx += IWL_FIRST_OFDM_RATE; /* For 2.4 GHZ band, check that there is no need to remap */ BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); /* Get PLCP rate for tx_cmd->rate_n_flags */ rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); mvm->mgmt_last_antenna_idx = iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), mvm->mgmt_last_antenna_idx); if (info->band == IEEE80211_BAND_2GHZ && !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; else rate_flags = BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; /* Set CCK flag as needed */ if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) rate_flags |= RATE_MCS_CCK_MSK; /* Set the rate in the TX cmd */ tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags); } /* * Sets the fields in the Tx cmd that are crypto related */ static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, struct ieee80211_tx_info *info, struct iwl_tx_cmd *tx_cmd, struct sk_buff *skb_frag, int hdrlen) { struct ieee80211_key_conf *keyconf = info->control.hw_key; u8 *crypto_hdr = skb_frag->data + hdrlen; u64 pn; switch (keyconf->cipher) { case WLAN_CIPHER_SUITE_CCMP: case WLAN_CIPHER_SUITE_CCMP_256: iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); pn = atomic64_inc_return(&keyconf->tx_pn); crypto_hdr[0] = pn; crypto_hdr[2] = 0; crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); crypto_hdr[1] = pn >> 8; crypto_hdr[4] = pn >> 16; crypto_hdr[5] = pn >> 24; crypto_hdr[6] = pn >> 32; crypto_hdr[7] = pn >> 40; break; case WLAN_CIPHER_SUITE_TKIP: tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); break; case WLAN_CIPHER_SUITE_WEP104: tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; /* fall through */ case WLAN_CIPHER_SUITE_WEP40: tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & TX_CMD_SEC_WEP_KEY_IDX_MSK); memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); break; default: tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; } } /* * Allocates and sets the Tx cmd the driver data pointers in the skb */ static struct iwl_device_cmd * iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, int hdrlen, struct ieee80211_sta *sta, u8 sta_id) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct iwl_device_cmd *dev_cmd; struct iwl_tx_cmd *tx_cmd; dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); if (unlikely(!dev_cmd)) return NULL; memset(dev_cmd, 0, sizeof(*dev_cmd)); dev_cmd->hdr.cmd = TX_CMD; tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; if (info->control.hw_key) iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); memset(&info->status, 0, sizeof(info->status)); info->driver_data[0] = NULL; info->driver_data[1] = dev_cmd; return dev_cmd; } int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct iwl_device_cmd *dev_cmd; struct iwl_tx_cmd *tx_cmd; u8 sta_id; int hdrlen = ieee80211_hdrlen(hdr->frame_control); if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU)) return -1; if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && (!info->control.vif || info->hw_queue != info->control.vif->cab_queue))) return -1; /* * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel * queue. STATION (HS2.0) uses the auxiliary context of the FW, * and hence needs to be sent on the aux queue */ if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && info->control.vif->type == NL80211_IFTYPE_STATION) IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue; /* * If the interface on which the frame is sent is the P2P_DEVICE * or an AP/GO interface use the broadcast station associated * with it; otherwise if the interface is a managed interface * use the AP station associated with it for multicast traffic * (this is not possible for unicast packets as a TLDS discovery * response are sent without a station entry); otherwise use the * AUX station. */ sta_id = mvm->aux_sta.sta_id; if (info->control.vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif); if (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE || info->control.vif->type == NL80211_IFTYPE_AP) sta_id = mvmvif->bcast_sta.sta_id; else if (info->control.vif->type == NL80211_IFTYPE_STATION && is_multicast_ether_addr(hdr->addr1)) { u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); if (ap_sta_id != IWL_MVM_STATION_COUNT) sta_id = ap_sta_id; } } IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue); dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, NULL, sta_id); if (!dev_cmd) return -1; /* From now on, we cannot access info->control */ tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; /* Copy MAC header from skb into command buffer */ memcpy(tx_cmd->hdr, hdr, hdrlen); if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) { iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); return -1; } return 0; } /* * Sets the fields in the Tx cmd that are crypto related */ int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_sta *sta) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct iwl_mvm_sta *mvmsta; struct iwl_device_cmd *dev_cmd; struct iwl_tx_cmd *tx_cmd; __le16 fc; u16 seq_number = 0; u8 tid = IWL_MAX_TID_COUNT; u8 txq_id = info->hw_queue; bool is_data_qos = false, is_ampdu = false; int hdrlen; mvmsta = iwl_mvm_sta_from_mac80211(sta); fc = hdr->frame_control; hdrlen = ieee80211_hdrlen(fc); if (WARN_ON_ONCE(!mvmsta)) return -1; if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) return -1; dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, sta, mvmsta->sta_id); if (!dev_cmd) goto drop; tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; /* From now on, we cannot access info->control */ /* * we handle that entirely ourselves -- for uAPSD the firmware * will always send a notification, and for PS-Poll responses * we'll notify mac80211 when getting frame status */ info->flags &= ~IEEE80211_TX_STATUS_EOSP; spin_lock(&mvmsta->lock); if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { u8 *qc = NULL; qc = ieee80211_get_qos_ctl(hdr); tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) goto drop_unlock_sta; seq_number = mvmsta->tid_data[tid].seq_number; seq_number &= IEEE80211_SCTL_SEQ; hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); hdr->seq_ctrl |= cpu_to_le16(seq_number); is_data_qos = true; is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; } /* Copy MAC header from skb into command buffer */ memcpy(tx_cmd->hdr, hdr, hdrlen); WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); if (sta->tdls) { /* default to TID 0 for non-QoS packets */ u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; } if (is_ampdu) { if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) goto drop_unlock_sta; txq_id = mvmsta->tid_data[tid].txq_id; } IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) goto drop_unlock_sta; if (is_data_qos && !ieee80211_has_morefrags(fc)) mvmsta->tid_data[tid].seq_number = seq_number + 0x10; spin_unlock(&mvmsta->lock); if (txq_id < mvm->first_agg_queue) atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); return 0; drop_unlock_sta: iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); spin_unlock(&mvmsta->lock); drop: return -1; } static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, struct ieee80211_sta *sta, u8 tid) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; struct ieee80211_vif *vif = mvmsta->vif; lockdep_assert_held(&mvmsta->lock); if ((tid_data->state == IWL_AGG_ON || tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && iwl_mvm_tid_queued(tid_data) == 0) { /* * Now that this aggregation queue is empty tell mac80211 so it * knows we no longer have frames buffered for the station on * this TID (for the TIM bitmap calculation.) */ ieee80211_sta_set_buffered(sta, tid, false); } if (tid_data->ssn != tid_data->next_reclaimed) return; switch (tid_data->state) { case IWL_EMPTYING_HW_QUEUE_ADDBA: IWL_DEBUG_TX_QUEUES(mvm, "Can continue addBA flow ssn = next_recl = %d\n", tid_data->next_reclaimed); tid_data->state = IWL_AGG_STARTING; ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); break; case IWL_EMPTYING_HW_QUEUE_DELBA: IWL_DEBUG_TX_QUEUES(mvm, "Can continue DELBA flow ssn = next_recl = %d\n", tid_data->next_reclaimed); iwl_mvm_disable_txq(mvm, tid_data->txq_id, vif->hw_queue[tid_to_mac80211_ac[tid]], tid, CMD_ASYNC); tid_data->state = IWL_AGG_OFF; ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); break; default: break; } } #ifdef CONFIG_IWLWIFI_DEBUG const char *iwl_mvm_get_tx_fail_reason(u32 status) { #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x switch (status & TX_STATUS_MSK) { case TX_STATUS_SUCCESS: return "SUCCESS"; TX_STATUS_POSTPONE(DELAY); TX_STATUS_POSTPONE(FEW_BYTES); TX_STATUS_POSTPONE(BT_PRIO); TX_STATUS_POSTPONE(QUIET_PERIOD); TX_STATUS_POSTPONE(CALC_TTAK); TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); TX_STATUS_FAIL(SHORT_LIMIT); TX_STATUS_FAIL(LONG_LIMIT); TX_STATUS_FAIL(UNDERRUN); TX_STATUS_FAIL(DRAIN_FLOW); TX_STATUS_FAIL(RFKILL_FLUSH); TX_STATUS_FAIL(LIFE_EXPIRE); TX_STATUS_FAIL(DEST_PS); TX_STATUS_FAIL(HOST_ABORTED); TX_STATUS_FAIL(BT_RETRY); TX_STATUS_FAIL(STA_INVALID); TX_STATUS_FAIL(FRAG_DROPPED); TX_STATUS_FAIL(TID_DISABLE); TX_STATUS_FAIL(FIFO_FLUSHED); TX_STATUS_FAIL(SMALL_CF_POLL); TX_STATUS_FAIL(FW_DROP); TX_STATUS_FAIL(STA_COLOR_MISMATCH); } return "UNKNOWN"; #undef TX_STATUS_FAIL #undef TX_STATUS_POSTPONE } #endif /* CONFIG_IWLWIFI_DEBUG */ void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, enum ieee80211_band band, struct ieee80211_tx_rate *r) { if (rate_n_flags & RATE_HT_MCS_GF_MSK) r->flags |= IEEE80211_TX_RC_GREEN_FIELD; switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { case RATE_MCS_CHAN_WIDTH_20: break; case RATE_MCS_CHAN_WIDTH_40: r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; break; case RATE_MCS_CHAN_WIDTH_80: r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; break; case RATE_MCS_CHAN_WIDTH_160: r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; break; } if (rate_n_flags & RATE_MCS_SGI_MSK) r->flags |= IEEE80211_TX_RC_SHORT_GI; if (rate_n_flags & RATE_MCS_HT_MSK) { r->flags |= IEEE80211_TX_RC_MCS; r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; } else if (rate_n_flags & RATE_MCS_VHT_MSK) { ieee80211_rate_set_vht( r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> RATE_VHT_MCS_NSS_POS) + 1); r->flags |= IEEE80211_TX_RC_VHT_MCS; } else { r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, band); } } /** * translate ucode response to mac80211 tx status control values */ static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, struct ieee80211_tx_info *info) { struct ieee80211_tx_rate *r = &info->status.rates[0]; info->status.antenna = ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); } static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) { struct ieee80211_sta *sta; u16 sequence = le16_to_cpu(pkt->hdr.sequence); int txq_id = SEQ_TO_QUEUE(sequence); struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); u32 status = le16_to_cpu(tx_resp->status.status); u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); struct iwl_mvm_sta *mvmsta; struct sk_buff_head skbs; u8 skb_freed = 0; u16 next_reclaimed, seq_ctl; __skb_queue_head_init(&skbs); seq_ctl = le16_to_cpu(tx_resp->seq_ctl); /* we can free until ssn % q.n_bd not inclusive */ iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); while (!skb_queue_empty(&skbs)) { struct sk_buff *skb = __skb_dequeue(&skbs); struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); skb_freed++; iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); memset(&info->status, 0, sizeof(info->status)); info->flags &= ~IEEE80211_TX_CTL_AMPDU; /* inform mac80211 about what happened with the frame */ switch (status & TX_STATUS_MSK) { case TX_STATUS_SUCCESS: case TX_STATUS_DIRECT_DONE: info->flags |= IEEE80211_TX_STAT_ACK; break; case TX_STATUS_FAIL_DEST_PS: info->flags |= IEEE80211_TX_STAT_TX_FILTERED; break; default: break; } info->status.rates[0].count = tx_resp->failure_frame + 1; iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), info); info->status.status_driver_data[1] = (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); /* Single frame failure in an AMPDU queue => send BAR */ if (txq_id >= mvm->first_agg_queue && !(info->flags & IEEE80211_TX_STAT_ACK) && !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; /* W/A FW bug: seq_ctl is wrong when the status isn't success */ if (status != TX_STATUS_SUCCESS) { struct ieee80211_hdr *hdr = (void *)skb->data; seq_ctl = le16_to_cpu(hdr->seq_ctrl); } /* * TODO: this is not accurate if we are freeing more than one * packet. */ info->status.tx_time = le16_to_cpu(tx_resp->wireless_media_time); BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); info->status.status_driver_data[0] = (void *)(uintptr_t)tx_resp->reduced_tpc; ieee80211_tx_status(mvm->hw, skb); } if (txq_id >= mvm->first_agg_queue) { /* If this is an aggregation queue, we use the ssn since: * ssn = wifi seq_num % 256. * The seq_ctl is the sequence control of the packet to which * this Tx response relates. But if there is a hole in the * bitmap of the BA we received, this Tx response may allow to * reclaim the hole and all the subsequent packets that were * already acked. In that case, seq_ctl != ssn, and the next * packet to be reclaimed will be ssn and not seq_ctl. In that * case, several packets will be reclaimed even if * frame_count = 1. * * The ssn is the index (% 256) of the latest packet that has * treated (acked / dropped) + 1. */ next_reclaimed = ssn; } else { /* The next packet to be reclaimed is the one after this one */ next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); } IWL_DEBUG_TX_REPLY(mvm, "TXQ %d status %s (0x%08x)\n", txq_id, iwl_mvm_get_tx_fail_reason(status), status); IWL_DEBUG_TX_REPLY(mvm, "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", le32_to_cpu(tx_resp->initial_rate), tx_resp->failure_frame, SEQ_TO_INDEX(sequence), ssn, next_reclaimed, seq_ctl); rcu_read_lock(); sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); /* * sta can't be NULL otherwise it'd mean that the sta has been freed in * the firmware while we still have packets for it in the Tx queues. */ if (WARN_ON_ONCE(!sta)) goto out; if (!IS_ERR(sta)) { mvmsta = iwl_mvm_sta_from_mac80211(sta); if (tid != IWL_TID_NON_QOS) { struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; spin_lock_bh(&mvmsta->lock); tid_data->next_reclaimed = next_reclaimed; IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", next_reclaimed); iwl_mvm_check_ratid_empty(mvm, sta, tid); spin_unlock_bh(&mvmsta->lock); } if (mvmsta->next_status_eosp) { mvmsta->next_status_eosp = false; ieee80211_sta_eosp(sta); } } else { mvmsta = NULL; } /* * If the txq is not an AMPDU queue, there is no chance we freed * several skbs. Check that out... */ if (txq_id >= mvm->first_agg_queue) goto out; /* We can't free more than one frame at once on a shared queue */ WARN_ON(skb_freed > 1); /* If we have still frames for this STA nothing to do here */ if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) goto out; if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { /* * If there are no pending frames for this STA and * the tx to this station is not disabled, notify * mac80211 that this station can now wake up in its * STA table. * If mvmsta is not NULL, sta is valid. */ spin_lock_bh(&mvmsta->lock); if (!mvmsta->disable_tx) ieee80211_sta_block_awake(mvm->hw, sta, false); spin_unlock_bh(&mvmsta->lock); } if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { /* * We are draining and this was the last packet - pre_rcu_remove * has been called already. We might be after the * synchronize_net already. * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. */ set_bit(sta_id, mvm->sta_drained); schedule_work(&mvm->sta_drained_wk); } out: rcu_read_unlock(); } #ifdef CONFIG_IWLWIFI_DEBUG #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x static const char *iwl_get_agg_tx_status(u16 status) { switch (status & AGG_TX_STATE_STATUS_MSK) { AGG_TX_STATE_(TRANSMITTED); AGG_TX_STATE_(UNDERRUN); AGG_TX_STATE_(BT_PRIO); AGG_TX_STATE_(FEW_BYTES); AGG_TX_STATE_(ABORT); AGG_TX_STATE_(LAST_SENT_TTL); AGG_TX_STATE_(LAST_SENT_TRY_CNT); AGG_TX_STATE_(LAST_SENT_BT_KILL); AGG_TX_STATE_(SCD_QUERY); AGG_TX_STATE_(TEST_BAD_CRC32); AGG_TX_STATE_(RESPONSE); AGG_TX_STATE_(DUMP_TX); AGG_TX_STATE_(DELAY_TX); } return "UNKNOWN"; } static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) { struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; struct agg_tx_status *frame_status = &tx_resp->status; int i; for (i = 0; i < tx_resp->frame_count; i++) { u16 fstatus = le16_to_cpu(frame_status[i].status); IWL_DEBUG_TX_REPLY(mvm, "status %s (0x%04x), try-count (%d) seq (0x%x)\n", iwl_get_agg_tx_status(fstatus), fstatus & AGG_TX_STATE_STATUS_MSK, (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> AGG_TX_STATE_TRY_CNT_POS, le16_to_cpu(frame_status[i].sequence)); } } #else static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) {} #endif /* CONFIG_IWLWIFI_DEBUG */ static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) { struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); u16 sequence = le16_to_cpu(pkt->hdr.sequence); struct ieee80211_sta *sta; if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue)) return; if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) return; iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); rcu_read_lock(); sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); mvmsta->tid_data[tid].rate_n_flags = le32_to_cpu(tx_resp->initial_rate); mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc; mvmsta->tid_data[tid].tx_time = le16_to_cpu(tx_resp->wireless_media_time); } rcu_read_unlock(); } void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) { struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; if (tx_resp->frame_count == 1) iwl_mvm_rx_tx_cmd_single(mvm, pkt); else iwl_mvm_rx_tx_cmd_agg(mvm, pkt); } static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info, struct iwl_mvm_ba_notif *ba_notif, struct iwl_mvm_tid_data *tid_data) { info->flags |= IEEE80211_TX_STAT_AMPDU; info->status.ampdu_ack_len = ba_notif->txed_2_done; info->status.ampdu_len = ba_notif->txed; iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags, info); /* TODO: not accounted if the whole A-MPDU failed */ info->status.tx_time = tid_data->tx_time; info->status.status_driver_data[0] = (void *)(uintptr_t)tid_data->reduced_tpc; info->status.status_driver_data[1] = (void *)(uintptr_t)tid_data->rate_n_flags; } void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) { struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data; struct sk_buff_head reclaimed_skbs; struct iwl_mvm_tid_data *tid_data; struct ieee80211_sta *sta; struct iwl_mvm_sta *mvmsta; struct sk_buff *skb; int sta_id, tid, freed; /* "flow" corresponds to Tx queue */ u16 scd_flow = le16_to_cpu(ba_notif->scd_flow); /* "ssn" is start of block-ack Tx window, corresponds to index * (in Tx queue's circular buffer) of first TFD/frame in window */ u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn); sta_id = ba_notif->sta_id; tid = ba_notif->tid; if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || tid >= IWL_MAX_TID_COUNT, "sta_id %d tid %d", sta_id, tid)) return; rcu_read_lock(); sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); /* Reclaiming frames for a station that has been deleted ? */ if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { rcu_read_unlock(); return; } mvmsta = iwl_mvm_sta_from_mac80211(sta); tid_data = &mvmsta->tid_data[tid]; if (tid_data->txq_id != scd_flow) { IWL_ERR(mvm, "invalid BA notification: Q %d, tid %d, flow %d\n", tid_data->txq_id, tid, scd_flow); rcu_read_unlock(); return; } spin_lock_bh(&mvmsta->lock); __skb_queue_head_init(&reclaimed_skbs); /* * Release all TFDs before the SSN, i.e. all TFDs in front of * block-ack window (we assume that they've been successfully * transmitted ... if not, it's too late anyway). */ iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn, &reclaimed_skbs); IWL_DEBUG_TX_REPLY(mvm, "BA_NOTIFICATION Received from %pM, sta_id = %d\n", (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id); IWL_DEBUG_TX_REPLY(mvm, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), (unsigned long long)le64_to_cpu(ba_notif->bitmap), scd_flow, ba_resp_scd_ssn, ba_notif->txed, ba_notif->txed_2_done); tid_data->next_reclaimed = ba_resp_scd_ssn; iwl_mvm_check_ratid_empty(mvm, sta, tid); freed = 0; skb_queue_walk(&reclaimed_skbs, skb) { struct ieee80211_hdr *hdr = (void *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); if (ieee80211_is_data_qos(hdr->frame_control)) freed++; else WARN_ON_ONCE(1); iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); memset(&info->status, 0, sizeof(info->status)); /* Packet was transmitted successfully, failures come as single * frames because before failing a frame the firmware transmits * it without aggregation at least once. */ info->flags |= IEEE80211_TX_STAT_ACK; /* this is the first skb we deliver in this batch */ /* put the rate scaling data there */ if (freed == 1) iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data); } spin_unlock_bh(&mvmsta->lock); /* We got a BA notif with 0 acked or scd_ssn didn't progress which is * possible (i.e. first MPDU in the aggregation wasn't acked) * Still it's important to update RS about sent vs. acked. */ if (skb_queue_empty(&reclaimed_skbs)) { struct ieee80211_tx_info ba_info = {}; struct ieee80211_chanctx_conf *chanctx_conf = NULL; if (mvmsta->vif) chanctx_conf = rcu_dereference(mvmsta->vif->chanctx_conf); if (WARN_ON_ONCE(!chanctx_conf)) goto out; ba_info.band = chanctx_conf->def.chan->band; iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data); IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info); } out: rcu_read_unlock(); while (!skb_queue_empty(&reclaimed_skbs)) { skb = __skb_dequeue(&reclaimed_skbs); ieee80211_tx_status(mvm->hw, skb); } } /* * Note that there are transports that buffer frames before they reach * the firmware. This means that after flush_tx_path is called, the * queue might not be empty. The race-free way to handle this is to: * 1) set the station as draining * 2) flush the Tx path * 3) wait for the transport queues to be empty */ int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) { int ret; struct iwl_tx_path_flush_cmd flush_cmd = { .queues_ctl = cpu_to_le32(tfd_msk), .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), }; ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, sizeof(flush_cmd), &flush_cmd); if (ret) IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); return ret; }