// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* * Copyright (C) 2012-2014, 2018-2020 Intel Corporation * Copyright (C) 2013-2015 Intel Mobile Communications GmbH * Copyright (C) 2016-2017 Intel Deutschland GmbH */ #include #include #include #include #include #include "iwl-trans.h" #include "iwl-eeprom-parse.h" #include "mvm.h" #include "sta.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; trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA); if (!trig) return; ba_trig = (void *)trig->data; if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) return; iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "BAR sent to %pM, tid %d, ssn %d", addr, tid, ssn); } #define OPT_HDR(type, skb, off) \ (type *)(skb_network_header(skb) + (off)) static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_hdr *hdr, struct ieee80211_tx_info *info, u16 offload_assist) { #if IS_ENABLED(CONFIG_INET) u16 mh_len = ieee80211_hdrlen(hdr->frame_control); u8 protocol = 0; /* Do not compute checksum if already computed */ if (skb->ip_summed != CHECKSUM_PARTIAL) goto out; /* We do not expect to be requested to csum stuff we do not support */ if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || (skb->protocol != htons(ETH_P_IP) && skb->protocol != htons(ETH_P_IPV6)), "No support for requested checksum\n")) { skb_checksum_help(skb); goto out; } if (skb->protocol == htons(ETH_P_IP)) { protocol = ip_hdr(skb)->protocol; } else { #if IS_ENABLED(CONFIG_IPV6) struct ipv6hdr *ipv6h = (struct ipv6hdr *)skb_network_header(skb); unsigned int off = sizeof(*ipv6h); protocol = ipv6h->nexthdr; while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { struct ipv6_opt_hdr *hp; /* only supported extension headers */ if (protocol != NEXTHDR_ROUTING && protocol != NEXTHDR_HOP && protocol != NEXTHDR_DEST) { skb_checksum_help(skb); goto out; } hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); protocol = hp->nexthdr; off += ipv6_optlen(hp); } /* if we get here - protocol now should be TCP/UDP */ #endif } if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { WARN_ON_ONCE(1); skb_checksum_help(skb); goto out; } /* enable L4 csum */ offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); /* * Set offset to IP header (snap). * We don't support tunneling so no need to take care of inner header. * Size is in words. */ offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ if (skb->protocol == htons(ETH_P_IP) && (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) { ip_hdr(skb)->check = 0; offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); } /* reset UDP/TCP header csum */ if (protocol == IPPROTO_TCP) tcp_hdr(skb)->check = 0; else udp_hdr(skb)->check = 0; /* * mac header len should include IV, size is in words unless * the IV is added by the firmware like in WEP. * In new Tx API, the IV is always added by the firmware. */ if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) mh_len += info->control.hw_key->iv_len; mh_len /= 2; offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; out: #endif return offload_assist; } /* * 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; u16 offload_assist = 0; u8 ac; if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || (ieee80211_is_probe_resp(fc) && !is_multicast_ether_addr(hdr->addr1))) 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; if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); } 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 { if (ieee80211_is_data(fc)) tx_cmd->tid_tspec = IWL_TID_NON_QOS; else tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 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_MAX_TID_COUNT */ 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(hdr->addr1)) 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 - PCIe code will adjust for A-MSDU */ tx_cmd->len = cpu_to_le16((u16)skb->len); tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); tx_cmd->sta_id = sta_id; /* padding is inserted later in transport */ if (ieee80211_hdrlen(fc) % 4 && !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) offload_assist |= BIT(TX_CMD_OFFLD_PAD); tx_cmd->offload_assist |= cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, offload_assist)); } static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, struct ieee80211_tx_info *info, struct ieee80211_sta *sta, __le16 fc) { if (info->band == NL80211_BAND_2GHZ && !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; if (sta && ieee80211_is_data(fc)) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; } return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; } static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, struct ieee80211_tx_info *info, struct ieee80211_sta *sta, __le16 fc) { int rate_idx = -1; u8 rate_plcp; u32 rate_flags = 0; /* info->control is only relevant for non HW rate control */ if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { /* HT rate doesn't make sense for a non data frame */ WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && !ieee80211_is_data(fc), "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", info->control.rates[0].flags, info->control.rates[0].idx, le16_to_cpu(fc), sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 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 non 2 GHZ band, remap mac80211 rate * indices into driver indices */ if (info->band != NL80211_BAND_2GHZ) 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); /* Set CCK flag as needed */ if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) rate_flags |= RATE_MCS_CCK_MSK; return (u32)rate_plcp | rate_flags; } static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, struct ieee80211_tx_info *info, struct ieee80211_sta *sta, __le16 fc) { return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | iwl_mvm_get_tx_ant(mvm, info, sta, fc); } /* * 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) { /* 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) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 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); } /* Set the rate in the TX cmd */ tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); } static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, u8 *crypto_hdr) { struct ieee80211_key_conf *keyconf = info->control.hw_key; u64 pn; 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; } /* * 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; enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; u64 pn; switch (keyconf->cipher) { case WLAN_CIPHER_SUITE_CCMP: iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); break; case WLAN_CIPHER_SUITE_TKIP: tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; pn = atomic64_inc_return(&keyconf->tx_pn); ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); break; case WLAN_CIPHER_SUITE_WEP104: tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; fallthrough; 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; case WLAN_CIPHER_SUITE_GCMP: case WLAN_CIPHER_SUITE_GCMP_256: type = TX_CMD_SEC_GCMP; fallthrough; case WLAN_CIPHER_SUITE_CCMP_256: /* TODO: Taking the key from the table might introduce a race * when PTK rekeying is done, having an old packets with a PN * based on the old key but the message encrypted with a new * one. * Need to handle this. */ tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; tx_cmd->key[0] = keyconf->hw_key_idx; iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 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_tx_cmd * iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_tx_info *info, int hdrlen, struct ieee80211_sta *sta, u8 sta_id) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct iwl_device_tx_cmd *dev_cmd; struct iwl_tx_cmd *tx_cmd; dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); if (unlikely(!dev_cmd)) return NULL; dev_cmd->hdr.cmd = TX_CMD; if (iwl_mvm_has_new_tx_api(mvm)) { u16 offload_assist = 0; u32 rate_n_flags = 0; u16 flags = 0; struct iwl_mvm_sta *mvmsta = sta ? iwl_mvm_sta_from_mac80211(sta) : NULL; if (ieee80211_is_data_qos(hdr->frame_control)) { u8 *qc = ieee80211_get_qos_ctl(hdr); if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); } offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, offload_assist); /* padding is inserted later in transport */ if (ieee80211_hdrlen(hdr->frame_control) % 4 && !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) offload_assist |= BIT(TX_CMD_OFFLD_PAD); if (!info->control.hw_key) flags |= IWL_TX_FLAGS_ENCRYPT_DIS; /* * For data packets rate info comes from the fw. Only * set rate/antenna during connection establishment or in case * no station is given. */ if (!sta || !ieee80211_is_data(hdr->frame_control) || mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { flags |= IWL_TX_FLAGS_CMD_RATE; rate_n_flags = iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, hdr->frame_control); } if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; cmd->offload_assist |= cpu_to_le32(offload_assist); /* Total # bytes to be transmitted */ cmd->len = cpu_to_le16((u16)skb->len); /* Copy MAC header from skb into command buffer */ memcpy(cmd->hdr, hdr, hdrlen); cmd->flags = cpu_to_le16(flags); cmd->rate_n_flags = cpu_to_le32(rate_n_flags); } else { struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; cmd->offload_assist |= cpu_to_le16(offload_assist); /* Total # bytes to be transmitted */ cmd->len = cpu_to_le16((u16)skb->len); /* Copy MAC header from skb into command buffer */ memcpy(cmd->hdr, hdr, hdrlen); cmd->flags = cpu_to_le32(flags); cmd->rate_n_flags = cpu_to_le32(rate_n_flags); } goto out; } 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); /* Copy MAC header from skb into command buffer */ memcpy(tx_cmd->hdr, hdr, hdrlen); out: return dev_cmd; } static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, struct iwl_device_tx_cmd *cmd) { struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); memset(&skb_info->status, 0, sizeof(skb_info->status)); memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); skb_info->driver_data[1] = cmd; } static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, struct ieee80211_tx_info *info, struct ieee80211_hdr *hdr) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif); __le16 fc = hdr->frame_control; switch (info->control.vif->type) { case NL80211_IFTYPE_AP: case NL80211_IFTYPE_ADHOC: /* * Non-bufferable frames use the broadcast station, thus they * use the probe queue. * Also take care of the case where we send a deauth to a * station that we don't have, or similarly an association * response (with non-success status) for a station we can't * accept. * Also, disassociate frames might happen, particular with * reason 7 ("Class 3 frame received from nonassociated STA"). */ if (ieee80211_is_mgmt(fc) && (!ieee80211_is_bufferable_mmpdu(fc) || ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) return mvm->probe_queue; if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && is_multicast_ether_addr(hdr->addr1)) return mvmvif->cab_queue; WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, "fc=0x%02x", le16_to_cpu(fc)); return mvm->probe_queue; case NL80211_IFTYPE_P2P_DEVICE: if (ieee80211_is_mgmt(fc)) return mvm->p2p_dev_queue; WARN_ON_ONCE(1); return mvm->p2p_dev_queue; default: WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); return -1; } } static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, struct sk_buff *skb) { struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; struct iwl_probe_resp_data *resp_data; u8 *ie, *pos; u8 match[] = { (WLAN_OUI_WFA >> 16) & 0xff, (WLAN_OUI_WFA >> 8) & 0xff, WLAN_OUI_WFA & 0xff, WLAN_OUI_TYPE_WFA_P2P, }; rcu_read_lock(); resp_data = rcu_dereference(mvmvif->probe_resp_data); if (!resp_data) goto out; if (!resp_data->notif.noa_active) goto out; ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, mgmt->u.probe_resp.variable, skb->len - base_len, match, 4, 2); if (!ie) { IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); goto out; } if (skb_tailroom(skb) < resp_data->noa_len) { if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { IWL_ERR(mvm, "Failed to reallocate probe resp\n"); goto out; } } pos = skb_put(skb, resp_data->noa_len); *pos++ = WLAN_EID_VENDOR_SPECIFIC; /* Set length of IE body (not including ID and length itself) */ *pos++ = resp_data->noa_len - 2; *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; *pos++ = WLAN_OUI_WFA & 0xff; *pos++ = WLAN_OUI_TYPE_WFA_P2P; memcpy(pos, &resp_data->notif.noa_attr, resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); out: rcu_read_unlock(); } 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; struct iwl_device_tx_cmd *dev_cmd; u8 sta_id; int hdrlen = ieee80211_hdrlen(hdr->frame_control); __le16 fc = hdr->frame_control; bool offchannel = IEEE80211_SKB_CB(skb)->flags & IEEE80211_TX_CTL_TX_OFFCHAN; int queue = -1; if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) return -1; memcpy(&info, skb->cb, sizeof(info)); if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) return -1; if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) return -1; 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 || info.control.vif->type == NL80211_IFTYPE_ADHOC) { if (!ieee80211_is_data(hdr->frame_control)) sta_id = mvmvif->bcast_sta.sta_id; else sta_id = mvmvif->mcast_sta.sta_id; queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr); } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { queue = mvm->snif_queue; sta_id = mvm->snif_sta.sta_id; } else if (info.control.vif->type == NL80211_IFTYPE_STATION && offchannel) { /* * 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. */ sta_id = mvm->aux_sta.sta_id; queue = mvm->aux_queue; } } if (queue < 0) { IWL_ERR(mvm, "No queue was found. Dropping TX\n"); return -1; } if (unlikely(ieee80211_is_probe_resp(fc))) iwl_mvm_probe_resp_set_noa(mvm, skb); IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); if (!dev_cmd) return -1; /* From now on, we cannot access info->control */ iwl_mvm_skb_prepare_status(skb, dev_cmd); if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); return -1; } return 0; } unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, struct ieee80211_sta *sta, unsigned int tid) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band; u8 ac = tid_to_mac80211_ac[tid]; unsigned int txf; int lmac = iwl_mvm_get_lmac_id(mvm->fw, band); /* For HE redirect to trigger based fifos */ if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) ac += 4; txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); /* * Don't send an AMSDU that will be longer than the TXF. * Add a security margin of 256 for the TX command + headers. * We also want to have the start of the next packet inside the * fifo to be able to send bursts. */ return min_t(unsigned int, mvmsta->max_amsdu_len, mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); } #ifdef CONFIG_INET static int iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, netdev_features_t netdev_flags, struct sk_buff_head *mpdus_skb) { struct sk_buff *tmp, *next; struct ieee80211_hdr *hdr = (void *)skb->data; char cb[sizeof(skb->cb)]; u16 i = 0; unsigned int tcp_payload_len; unsigned int mss = skb_shinfo(skb)->gso_size; bool ipv4 = (skb->protocol == htons(ETH_P_IP)); bool qos = ieee80211_is_data_qos(hdr->frame_control); u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; skb_shinfo(skb)->gso_size = num_subframes * mss; memcpy(cb, skb->cb, sizeof(cb)); next = skb_gso_segment(skb, netdev_flags); skb_shinfo(skb)->gso_size = mss; skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; if (WARN_ON_ONCE(IS_ERR(next))) return -EINVAL; else if (next) consume_skb(skb); skb_list_walk_safe(next, tmp, next) { memcpy(tmp->cb, cb, sizeof(tmp->cb)); /* * Compute the length of all the data added for the A-MSDU. * This will be used to compute the length to write in the TX * command. We have: SNAP + IP + TCP for n -1 subframes and * ETH header for n subframes. */ tcp_payload_len = skb_tail_pointer(tmp) - skb_transport_header(tmp) - tcp_hdrlen(tmp) + tmp->data_len; if (ipv4) ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); if (tcp_payload_len > mss) { skb_shinfo(tmp)->gso_size = mss; skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; } else { if (qos) { u8 *qc; if (ipv4) ip_send_check(ip_hdr(tmp)); qc = ieee80211_get_qos_ctl((void *)tmp->data); *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; } skb_shinfo(tmp)->gso_size = 0; } skb_mark_not_on_list(tmp); __skb_queue_tail(mpdus_skb, tmp); i++; } return 0; } static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_tx_info *info, struct ieee80211_sta *sta, struct sk_buff_head *mpdus_skb) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct ieee80211_hdr *hdr = (void *)skb->data; unsigned int mss = skb_shinfo(skb)->gso_size; unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; u16 snap_ip_tcp, pad; netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; u8 tid; snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + tcp_hdrlen(skb); if (!mvmsta->max_amsdu_len || !ieee80211_is_data_qos(hdr->frame_control) || !mvmsta->amsdu_enabled) return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); /* * Do not build AMSDU for IPv6 with extension headers. * ask stack to segment and checkum the generated MPDUs for us. */ if (skb->protocol == htons(ETH_P_IPV6) && ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != IPPROTO_TCP) { netdev_flags &= ~NETIF_F_CSUM_MASK; return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); } tid = ieee80211_get_tid(hdr); if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) return -EINVAL; /* * No need to lock amsdu_in_ampdu_allowed since it can't be modified * during an BA session. */ if ((info->flags & IEEE80211_TX_CTL_AMPDU && !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || !(mvmsta->amsdu_enabled & BIT(tid))) return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); /* * Take the min of ieee80211 station and mvm station */ max_amsdu_len = min_t(unsigned int, sta->max_amsdu_len, iwl_mvm_max_amsdu_size(mvm, sta, tid)); /* * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not * supported. This is a spec requirement (IEEE 802.11-2015 * section 8.7.3 NOTE 3). */ if (info->flags & IEEE80211_TX_CTL_AMPDU && !sta->vht_cap.vht_supported) max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); /* Sub frame header + SNAP + IP header + TCP header + MSS */ subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; pad = (4 - subf_len) & 0x3; /* * If we have N subframes in the A-MSDU, then the A-MSDU's size is * N * subf_len + (N - 1) * pad. */ num_subframes = (max_amsdu_len + pad) / (subf_len + pad); if (sta->max_amsdu_subframes && num_subframes > sta->max_amsdu_subframes) num_subframes = sta->max_amsdu_subframes; tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - tcp_hdrlen(skb) + skb->data_len; /* * Make sure we have enough TBs for the A-MSDU: * 2 for each subframe * 1 more for each fragment * 1 more for the potential data in the header */ if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > mvm->trans->max_skb_frags) num_subframes = 1; if (num_subframes > 1) *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; /* This skb fits in one single A-MSDU */ if (num_subframes * mss >= tcp_payload_len) { __skb_queue_tail(mpdus_skb, skb); return 0; } /* * Trick the segmentation function to make it * create SKBs that can fit into one A-MSDU. */ return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, mpdus_skb); } #else /* CONFIG_INET */ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_tx_info *info, struct ieee80211_sta *sta, struct sk_buff_head *mpdus_skb) { /* Impossible to get TSO with CONFIG_INET */ WARN_ON(1); return -1; } #endif /* Check if there are any timed-out TIDs on a given shared TXQ */ static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) { unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; unsigned long now = jiffies; int tid; if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) return false; for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + IWL_MVM_DQA_QUEUE_TIMEOUT, now)) return true; } return false; } static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, int airtime) { int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; struct iwl_mvm_tcm_mac *mdata; if (mac >= NUM_MAC_INDEX_DRIVER) return; mdata = &mvm->tcm.data[mac]; if (mvm->tcm.paused) return; if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) schedule_delayed_work(&mvm->tcm.work, 0); mdata->tx.airtime += airtime; } static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, int tid) { u32 ac = tid_to_mac80211_ac[tid]; int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; struct iwl_mvm_tcm_mac *mdata; if (mac >= NUM_MAC_INDEX_DRIVER) return -EINVAL; mdata = &mvm->tcm.data[mac]; mdata->tx.pkts[ac]++; return 0; } /* * Sets the fields in the Tx cmd that are crypto related. * * This function must be called with BHs disabled. */ static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_tx_info *info, struct ieee80211_sta *sta) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct iwl_mvm_sta *mvmsta; struct iwl_device_tx_cmd *dev_cmd; __le16 fc; u16 seq_number = 0; u8 tid = IWL_MAX_TID_COUNT; u16 txq_id; bool is_ampdu = false; int hdrlen; mvmsta = iwl_mvm_sta_from_mac80211(sta); fc = hdr->frame_control; hdrlen = ieee80211_hdrlen(fc); if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) return -1; if (WARN_ON_ONCE(!mvmsta)) return -1; if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) return -1; if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->he_cap.has_he) return -1; if (unlikely(ieee80211_is_probe_resp(fc))) iwl_mvm_probe_resp_set_noa(mvm, skb); dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, sta, mvmsta->sta_id); if (!dev_cmd) goto drop; /* * 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); /* nullfunc frames should go to the MGMT queue regardless of QOS, * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default * assignment of MGMT TID */ if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { tid = ieee80211_get_tid(hdr); if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) goto drop_unlock_sta; is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; if (WARN_ONCE(is_ampdu && mvmsta->tid_data[tid].state != IWL_AGG_ON, "Invalid internal agg state %d for TID %d", mvmsta->tid_data[tid].state, tid)) goto drop_unlock_sta; seq_number = mvmsta->tid_data[tid].seq_number; seq_number &= IEEE80211_SCTL_SEQ; if (!iwl_mvm_has_new_tx_api(mvm)) { struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); hdr->seq_ctrl |= cpu_to_le16(seq_number); /* update the tx_cmd hdr as it was already copied */ tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; } } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) { tid = IWL_TID_NON_QOS; } txq_id = mvmsta->tid_data[tid].txq_id; WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); spin_unlock(&mvmsta->lock); return -1; } if (!iwl_mvm_has_new_tx_api(mvm)) { /* Keep track of the time of the last frame for this RA/TID */ mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; /* * If we have timed-out TIDs - schedule the worker that will * reconfig the queues and update them * * Note that the no lock is taken here in order to not serialize * the TX flow. This isn't dangerous because scheduling * mvm->add_stream_wk can't ruin the state, and if we DON'T * schedule it due to some race condition then next TX we get * here we will. */ if (unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED && iwl_mvm_txq_should_update(mvm, txq_id))) schedule_work(&mvm->add_stream_wk); } IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", mvmsta->sta_id, tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number), skb->len); /* From now on, we cannot access info->control */ iwl_mvm_skb_prepare_status(skb, dev_cmd); if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) goto drop_unlock_sta; if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) mvmsta->tid_data[tid].seq_number = seq_number + 0x10; spin_unlock(&mvmsta->lock); if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid)) goto drop; return 0; drop_unlock_sta: iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); spin_unlock(&mvmsta->lock); drop: IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid); return -1; } int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_sta *sta) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct ieee80211_tx_info info; struct sk_buff_head mpdus_skbs; unsigned int payload_len; int ret; struct sk_buff *orig_skb = skb; if (WARN_ON_ONCE(!mvmsta)) return -1; if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) return -1; memcpy(&info, skb->cb, sizeof(info)); if (!skb_is_gso(skb)) return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - tcp_hdrlen(skb) + skb->data_len; if (payload_len <= skb_shinfo(skb)->gso_size) return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); __skb_queue_head_init(&mpdus_skbs); ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); if (ret) return ret; if (WARN_ON(skb_queue_empty(&mpdus_skbs))) return ret; while (!skb_queue_empty(&mpdus_skbs)) { skb = __skb_dequeue(&mpdus_skbs); ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); if (ret) { /* Free skbs created as part of TSO logic that have not yet been dequeued */ __skb_queue_purge(&mpdus_skbs); /* skb here is not necessarily same as skb that entered this method, * so free it explicitly. */ if (skb == orig_skb) ieee80211_free_txskb(mvm->hw, skb); else kfree_skb(skb); /* there was error, but we consumed skb one way or another, so return 0 */ return 0; } } return 0; } 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; u16 normalized_ssn; lockdep_assert_held(&mvmsta->lock); if ((tid_data->state == IWL_AGG_ON || tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && iwl_mvm_tid_queued(mvm, tid_data) == 0) { /* * Now that this aggregation or DQA 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); } /* * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need * to align the wrap around of ssn so we compare relevant values. */ normalized_ssn = tid_data->ssn; if (mvm->trans->trans_cfg->gen2) normalized_ssn &= 0xff; if (normalized_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); 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 nl80211_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_tx_status_check_trigger(struct iwl_mvm *mvm, u32 status, __le16 frame_control) { struct iwl_fw_dbg_trigger_tlv *trig; struct iwl_fw_dbg_trigger_tx_status *status_trig; int i; if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { enum iwl_fw_ini_time_point tp = IWL_FW_INI_TIME_POINT_TX_FAILED; if (ieee80211_is_action(frame_control)) tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; iwl_dbg_tlv_time_point(&mvm->fwrt, tp, NULL); return; } trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_TX_STATUS); if (!trig) return; status_trig = (void *)trig->data; for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { /* don't collect on status 0 */ if (!status_trig->statuses[i].status) break; if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) continue; iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "Tx status %d was received", status & TX_STATUS_MSK); break; } } /* * iwl_mvm_get_scd_ssn - returns the SSN of the SCD * @tx_resp: the Tx response from the fw (agg or non-agg) * * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since * it can't know that everything will go well until the end of the AMPDU, it * can't know in advance the number of MPDUs that will be sent in the current * batch. This is why it writes the agg Tx response while it fetches the MPDUs. * Hence, it can't know in advance what the SSN of the SCD will be at the end * of the batch. This is why the SSN of the SCD is written at the end of the * whole struct at a variable offset. This function knows how to cope with the * variable offset and returns the SSN of the SCD. */ static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, struct iwl_mvm_tx_resp *tx_resp) { return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + tx_resp->frame_count) & 0xfff; } 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_v3 is almost the same */ 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); struct agg_tx_status *agg_status = iwl_mvm_get_agg_status(mvm, tx_resp); u32 status = le16_to_cpu(agg_status->status); u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); struct sk_buff_head skbs; u8 skb_freed = 0; u8 lq_color; u16 next_reclaimed, seq_ctl; bool is_ndp = false; __skb_queue_head_init(&skbs); if (iwl_mvm_has_new_tx_api(mvm)) txq_id = le16_to_cpu(tx_resp->tx_queue); 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); struct ieee80211_hdr *hdr = (void *)skb->data; bool flushed = false; skb_freed++; iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); memset(&info->status, 0, sizeof(info->status)); /* 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_FIFO_FLUSHED: case TX_STATUS_FAIL_DRAIN_FLOW: flushed = true; break; case TX_STATUS_FAIL_DEST_PS: /* the FW should have stopped the queue and not * return this status */ WARN_ON(1); info->flags |= IEEE80211_TX_STAT_TX_FILTERED; break; default: break; } if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && ieee80211_is_mgmt(hdr->frame_control)) iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); /* * If we are freeing multiple frames, mark all the frames * but the first one as acked, since they were acknowledged * before * */ if (skb_freed > 1) info->flags |= IEEE80211_TX_STAT_ACK; iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 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 (info->flags & IEEE80211_TX_CTL_AMPDU && !(info->flags & IEEE80211_TX_STAT_ACK) && !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; info->flags &= ~IEEE80211_TX_CTL_AMPDU; /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ if (ieee80211_is_back_req(hdr->frame_control)) seq_ctl = 0; else if (status != TX_STATUS_SUCCESS) seq_ctl = le16_to_cpu(hdr->seq_ctrl); if (unlikely(!seq_ctl)) { struct ieee80211_hdr *hdr = (void *)skb->data; /* * If it is an NDP, we can't update next_reclaim since * its sequence control is 0. Note that for that same * reason, NDPs are never sent to A-MPDU'able queues * so that we can never have more than one freed frame * for a single Tx resonse (see WARN_ON below). */ if (ieee80211_is_qos_nullfunc(hdr->frame_control)) is_ndp = true; } /* * 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); lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); info->status.status_driver_data[0] = RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); ieee80211_tx_status(mvm->hw, skb); } /* This is an aggregation queue or might become one, so 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; 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)) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); iwl_mvm_tx_airtime(mvm, mvmsta, le16_to_cpu(tx_resp->wireless_media_time)); if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); if (sta->wme && tid != IWL_MGMT_TID) { struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; bool send_eosp_ndp = false; spin_lock_bh(&mvmsta->lock); if (!is_ndp) { tid_data->next_reclaimed = next_reclaimed; IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", next_reclaimed); } else { IWL_DEBUG_TX_REPLY(mvm, "NDP - don't update next_reclaimed\n"); } iwl_mvm_check_ratid_empty(mvm, sta, tid); if (mvmsta->sleep_tx_count) { mvmsta->sleep_tx_count--; if (mvmsta->sleep_tx_count && !iwl_mvm_tid_queued(mvm, tid_data)) { /* * The number of frames in the queue * dropped to 0 even if we sent less * frames than we thought we had on the * Tx queue. * This means we had holes in the BA * window that we just filled, ask * mac80211 to send EOSP since the * firmware won't know how to do that. * Send NDP and the firmware will send * EOSP notification that will trigger * a call to ieee80211_sta_eosp(). */ send_eosp_ndp = true; } } spin_unlock_bh(&mvmsta->lock); if (send_eosp_ndp) { iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, IEEE80211_FRAME_RELEASE_UAPSD, 1, tid, false, false); mvmsta->sleep_tx_count = 0; ieee80211_send_eosp_nullfunc(sta, tid); } } if (mvmsta->next_status_eosp) { mvmsta->next_status_eosp = false; ieee80211_sta_eosp(sta); } } 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_(TX_ON_AIR_DROP); 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 = iwl_mvm_get_agg_status(mvm, tx_resp); int i; bool tirgger_timepoint = false; for (i = 0; i < tx_resp->frame_count; i++) { u16 fstatus = le16_to_cpu(frame_status[i].status); /* In case one frame wasn't transmitted trigger time point */ tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != AGG_TX_STATE_TRANSMITTED); 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)); } if (tirgger_timepoint) iwl_dbg_tlv_time_point(&mvm->fwrt, IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); } #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 iwl_mvm_sta *mvmsta; int queue = SEQ_TO_QUEUE(sequence); struct ieee80211_sta *sta; if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) return; iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); rcu_read_lock(); mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); if (WARN_ON_ONCE(!sta || !sta->wme)) { rcu_read_unlock(); return; } if (!WARN_ON_ONCE(!mvmsta)) { mvmsta->tid_data[tid].rate_n_flags = le32_to_cpu(tx_resp->initial_rate); mvmsta->tid_data[tid].tx_time = le16_to_cpu(tx_resp->wireless_media_time); mvmsta->tid_data[tid].lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); iwl_mvm_tx_airtime(mvm, mvmsta, 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_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, int txq, int index, struct ieee80211_tx_info *tx_info, u32 rate, bool is_flush) { struct sk_buff_head reclaimed_skbs; struct iwl_mvm_tid_data *tid_data = NULL; struct ieee80211_sta *sta; struct iwl_mvm_sta *mvmsta = NULL; struct sk_buff *skb; int freed; if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 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(!sta)) { rcu_read_unlock(); return; } __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, txq, index, &reclaimed_skbs); skb_queue_walk(&reclaimed_skbs, skb) { struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 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. */ if (!is_flush) info->flags |= IEEE80211_TX_STAT_ACK; } /* * It's possible to get a BA response after invalidating the rcu (rcu is * invalidated in order to prevent new Tx from being sent, but there may * be some frames already in-flight). * In this case we just want to reclaim, and could skip all the * sta-dependent stuff since it's in the middle of being removed * anyways. */ if (IS_ERR(sta)) goto out; mvmsta = iwl_mvm_sta_from_mac80211(sta); tid_data = &mvmsta->tid_data[tid]; if (tid_data->txq_id != txq) { IWL_ERR(mvm, "invalid reclaim request: Q %d, tid %d\n", tid_data->txq_id, tid); rcu_read_unlock(); return; } spin_lock_bh(&mvmsta->lock); tid_data->next_reclaimed = index; iwl_mvm_check_ratid_empty(mvm, sta, tid); freed = 0; /* pack lq color from tid_data along the reduced txp */ tx_info->status.status_driver_data[0] = RS_DRV_DATA_PACK(tid_data->lq_color, tx_info->status.status_driver_data[0]); tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; skb_queue_walk(&reclaimed_skbs, skb) { struct ieee80211_hdr *hdr = (void *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); if (!is_flush) { if (ieee80211_is_data_qos(hdr->frame_control)) freed++; else WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); } /* this is the first skb we deliver in this batch */ /* put the rate scaling data there */ if (freed == 1) { info->flags |= IEEE80211_TX_STAT_AMPDU; memcpy(&info->status, &tx_info->status, sizeof(tx_info->status)); iwl_mvm_hwrate_to_tx_status(rate, info); } } 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 (!is_flush && skb_queue_empty(&reclaimed_skbs)) { 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; tx_info->band = chanctx_conf->def.chan->band; iwl_mvm_hwrate_to_tx_status(rate, tx_info); if (!iwl_mvm_has_tlc_offload(mvm)) { IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); } } out: rcu_read_unlock(); while (!skb_queue_empty(&reclaimed_skbs)) { skb = __skb_dequeue(&reclaimed_skbs); ieee80211_tx_status(mvm->hw, skb); } } void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) { struct iwl_rx_packet *pkt = rxb_addr(rxb); unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); int sta_id, tid, txq, index; struct ieee80211_tx_info ba_info = {}; struct iwl_mvm_ba_notif *ba_notif; struct iwl_mvm_tid_data *tid_data; struct iwl_mvm_sta *mvmsta; ba_info.flags = IEEE80211_TX_STAT_AMPDU; if (iwl_mvm_has_new_tx_api(mvm)) { struct iwl_mvm_compressed_ba_notif *ba_res = (void *)pkt->data; u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); u16 tfd_cnt; int i; if (unlikely(sizeof(*ba_res) > pkt_len)) return; sta_id = ba_res->sta_id; ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); ba_info.status.tx_time = (u16)le32_to_cpu(ba_res->wireless_time); ba_info.status.status_driver_data[0] = (void *)(uintptr_t)ba_res->reduced_txp; tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len) return; rcu_read_lock(); mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); /* * It's possible to get a BA response after invalidating the rcu * (rcu is invalidated in order to prevent new Tx from being * sent, but there may be some frames already in-flight). * In this case we just want to reclaim, and could skip all the * sta-dependent stuff since it's in the middle of being removed * anyways. */ /* Free per TID */ for (i = 0; i < tfd_cnt; i++) { struct iwl_mvm_compressed_ba_tfd *ba_tfd = &ba_res->tfd[i]; tid = ba_tfd->tid; if (tid == IWL_MGMT_TID) tid = IWL_MAX_TID_COUNT; if (mvmsta) mvmsta->tid_data[i].lq_color = lq_color; iwl_mvm_tx_reclaim(mvm, sta_id, tid, (int)(le16_to_cpu(ba_tfd->q_num)), le16_to_cpu(ba_tfd->tfd_index), &ba_info, le32_to_cpu(ba_res->tx_rate), false); } if (mvmsta) iwl_mvm_tx_airtime(mvm, mvmsta, le32_to_cpu(ba_res->wireless_time)); rcu_read_unlock(); IWL_DEBUG_TX_REPLY(mvm, "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", sta_id, le32_to_cpu(ba_res->flags), le16_to_cpu(ba_res->txed), le16_to_cpu(ba_res->done)); return; } ba_notif = (void *)pkt->data; sta_id = ba_notif->sta_id; tid = ba_notif->tid; /* "flow" corresponds to Tx queue */ txq = 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 */ index = le16_to_cpu(ba_notif->scd_ssn); rcu_read_lock(); mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); if (WARN_ON_ONCE(!mvmsta)) { rcu_read_unlock(); return; } tid_data = &mvmsta->tid_data[tid]; ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; ba_info.status.ampdu_len = ba_notif->txed; ba_info.status.tx_time = tid_data->tx_time; ba_info.status.status_driver_data[0] = (void *)(uintptr_t)ba_notif->reduced_txp; rcu_read_unlock(); iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, tid_data->rate_n_flags, false); IWL_DEBUG_TX_REPLY(mvm, "BA_NOTIFICATION Received from %pM, sta_id = %d\n", ba_notif->sta_addr, 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), le64_to_cpu(ba_notif->bitmap), txq, index, ba_notif->txed, ba_notif->txed_2_done); IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", ba_notif->reduced_txp); } /* * 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) { int ret; struct iwl_tx_path_flush_cmd_v1 flush_cmd = { .queues_ctl = cpu_to_le32(tfd_msk), .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), }; WARN_ON(iwl_mvm_has_new_tx_api(mvm)); ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, sizeof(flush_cmd), &flush_cmd); if (ret) IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); return ret; } int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) { int ret; struct iwl_tx_path_flush_cmd_rsp *rsp; struct iwl_tx_path_flush_cmd flush_cmd = { .sta_id = cpu_to_le32(sta_id), .tid_mask = cpu_to_le16(tids), }; struct iwl_host_cmd cmd = { .id = TXPATH_FLUSH, .len = { sizeof(flush_cmd), }, .data = { &flush_cmd, }, }; WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) cmd.flags |= CMD_WANT_SKB; IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", sta_id, tids); ret = iwl_mvm_send_cmd(mvm, &cmd); if (ret) { IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); return ret; } if (cmd.flags & CMD_WANT_SKB) { int i; int num_flushed_queues; if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { ret = -EIO; goto free_rsp; } rsp = (void *)cmd.resp_pkt->data; if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, "sta_id %d != rsp_sta_id %d", sta_id, le16_to_cpu(rsp->sta_id))) { ret = -EIO; goto free_rsp; } num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, "num_flushed_queues %d", num_flushed_queues)) { ret = -EIO; goto free_rsp; } for (i = 0; i < num_flushed_queues; i++) { struct ieee80211_tx_info tx_info = {}; struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; int tid = le16_to_cpu(queue_info->tid); int read_before = le16_to_cpu(queue_info->read_before_flush); int read_after = le16_to_cpu(queue_info->read_after_flush); int queue_num = le16_to_cpu(queue_info->queue_num); if (tid == IWL_MGMT_TID) tid = IWL_MAX_TID_COUNT; IWL_DEBUG_TX_QUEUES(mvm, "tid %d queue_id %d read-before %d read-after %d\n", tid, queue_num, read_before, read_after); iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, &tx_info, 0, true); } free_rsp: iwl_free_resp(&cmd); } return ret; } int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal) { struct iwl_mvm_int_sta *int_sta = sta; struct iwl_mvm_sta *mvm_sta = sta; BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != offsetof(struct iwl_mvm_sta, sta_id)); if (iwl_mvm_has_new_tx_api(mvm)) return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff); if (internal) return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk); return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk); }