| /****************************************************************************** |
| * |
| * GPL LICENSE SUMMARY |
| * |
| * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved. |
| * |
| * 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 <linuxwifi@intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| *****************************************************************************/ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/sched.h> |
| #include <linux/ieee80211.h> |
| #include "iwl-io.h" |
| #include "iwl-trans.h" |
| #include "iwl-agn-hw.h" |
| #include "dev.h" |
| #include "agn.h" |
| |
| static const u8 tid_to_ac[] = { |
| IEEE80211_AC_BE, |
| IEEE80211_AC_BK, |
| IEEE80211_AC_BK, |
| IEEE80211_AC_BE, |
| IEEE80211_AC_VI, |
| IEEE80211_AC_VI, |
| IEEE80211_AC_VO, |
| IEEE80211_AC_VO, |
| }; |
| |
| static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, |
| struct ieee80211_tx_info *info, |
| __le16 fc, __le32 *tx_flags) |
| { |
| if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || |
| info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT || |
| info->flags & IEEE80211_TX_CTL_AMPDU) |
| *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; |
| } |
| |
| /* |
| * handle build REPLY_TX command notification. |
| */ |
| static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv, |
| struct sk_buff *skb, |
| struct iwl_tx_cmd *tx_cmd, |
| struct ieee80211_tx_info *info, |
| struct ieee80211_hdr *hdr, u8 sta_id) |
| { |
| __le16 fc = hdr->frame_control; |
| __le32 tx_flags = tx_cmd->tx_flags; |
| |
| tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; |
| |
| if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) |
| tx_flags |= TX_CMD_FLG_ACK_MSK; |
| else |
| tx_flags &= ~TX_CMD_FLG_ACK_MSK; |
| |
| if (ieee80211_is_probe_resp(fc)) |
| tx_flags |= TX_CMD_FLG_TSF_MSK; |
| else if (ieee80211_is_back_req(fc)) |
| tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; |
| else if (info->band == NL80211_BAND_2GHZ && |
| priv->lib->bt_params && |
| priv->lib->bt_params->advanced_bt_coexist && |
| (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) || |
| ieee80211_is_reassoc_req(fc) || |
| info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)) |
| tx_flags |= TX_CMD_FLG_IGNORE_BT; |
| |
| |
| tx_cmd->sta_id = sta_id; |
| if (ieee80211_has_morefrags(fc)) |
| tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; |
| |
| 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_MSK; |
| } else { |
| tx_cmd->tid_tspec = IWL_TID_NON_QOS; |
| if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) |
| tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; |
| else |
| tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; |
| } |
| |
| iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags); |
| |
| tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); |
| if (ieee80211_is_mgmt(fc)) { |
| if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) |
| tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); |
| else |
| tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); |
| } else { |
| tx_cmd->timeout.pm_frame_timeout = 0; |
| } |
| |
| tx_cmd->driver_txop = 0; |
| tx_cmd->tx_flags = tx_flags; |
| tx_cmd->next_frame_len = 0; |
| } |
| |
| static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv, |
| struct iwl_tx_cmd *tx_cmd, |
| struct ieee80211_tx_info *info, |
| struct ieee80211_sta *sta, |
| __le16 fc) |
| { |
| u32 rate_flags; |
| int rate_idx; |
| u8 rts_retry_limit; |
| u8 data_retry_limit; |
| u8 rate_plcp; |
| |
| if (priv->wowlan) { |
| rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT; |
| data_retry_limit = IWLAGN_LOW_RETRY_LIMIT; |
| } else { |
| /* Set retry limit on RTS packets */ |
| rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT; |
| |
| /* Set retry limit on DATA packets and Probe Responses*/ |
| if (ieee80211_is_probe_resp(fc)) { |
| data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT; |
| rts_retry_limit = |
| min(data_retry_limit, rts_retry_limit); |
| } else if (ieee80211_is_back_req(fc)) |
| data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT; |
| else |
| data_retry_limit = IWLAGN_DEFAULT_TX_RETRY; |
| } |
| |
| tx_cmd->data_retry_limit = data_retry_limit; |
| tx_cmd->rts_retry_limit = rts_retry_limit; |
| |
| /* DATA packets will use the uCode station table for rate/antenna |
| * selection */ |
| if (ieee80211_is_data(fc)) { |
| tx_cmd->initial_rate_index = 0; |
| tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; |
| return; |
| } else if (ieee80211_is_back_req(fc)) |
| tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; |
| |
| /** |
| * If the current TX rate stored in mac80211 has the MCS bit set, it's |
| * not really a TX rate. Thus, we use the lowest supported rate for |
| * this band. Also use the lowest supported rate if the stored rate |
| * index is invalid. |
| */ |
| rate_idx = info->control.rates[0].idx; |
| if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || |
| (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) |
| rate_idx = rate_lowest_index( |
| &priv->nvm_data->bands[info->band], sta); |
| /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ |
| if (info->band == NL80211_BAND_5GHZ) |
| rate_idx += IWL_FIRST_OFDM_RATE; |
| /* Get PLCP rate for tx_cmd->rate_n_flags */ |
| rate_plcp = iwl_rates[rate_idx].plcp; |
| /* Zero out flags for this packet */ |
| rate_flags = 0; |
| |
| /* 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 up antennas */ |
| if (priv->lib->bt_params && |
| priv->lib->bt_params->advanced_bt_coexist && |
| priv->bt_full_concurrent) { |
| /* operated as 1x1 in full concurrency mode */ |
| priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, |
| first_antenna(priv->nvm_data->valid_tx_ant)); |
| } else |
| priv->mgmt_tx_ant = iwl_toggle_tx_ant( |
| priv, priv->mgmt_tx_ant, |
| priv->nvm_data->valid_tx_ant); |
| rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); |
| |
| /* Set the rate in the TX cmd */ |
| tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); |
| } |
| |
| static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv, |
| struct ieee80211_tx_info *info, |
| struct iwl_tx_cmd *tx_cmd, |
| struct sk_buff *skb_frag) |
| { |
| struct ieee80211_key_conf *keyconf = info->control.hw_key; |
| |
| switch (keyconf->cipher) { |
| case WLAN_CIPHER_SUITE_CCMP: |
| tx_cmd->sec_ctl = TX_CMD_SEC_CCM; |
| memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); |
| if (info->flags & IEEE80211_TX_CTL_AMPDU) |
| tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; |
| 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_MSK) << TX_CMD_SEC_SHIFT); |
| |
| memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); |
| |
| IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " |
| "with key %d\n", keyconf->keyidx); |
| break; |
| |
| default: |
| IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); |
| break; |
| } |
| } |
| |
| /** |
| * iwl_sta_id_or_broadcast - return sta_id or broadcast sta |
| * @context: the current context |
| * @sta: mac80211 station |
| * |
| * In certain circumstances mac80211 passes a station pointer |
| * that may be %NULL, for example during TX or key setup. In |
| * that case, we need to use the broadcast station, so this |
| * inline wraps that pattern. |
| */ |
| static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context, |
| struct ieee80211_sta *sta) |
| { |
| int sta_id; |
| |
| if (!sta) |
| return context->bcast_sta_id; |
| |
| sta_id = iwl_sta_id(sta); |
| |
| /* |
| * mac80211 should not be passing a partially |
| * initialised station! |
| */ |
| WARN_ON(sta_id == IWL_INVALID_STATION); |
| |
| return sta_id; |
| } |
| |
| /* |
| * start REPLY_TX command process |
| */ |
| int iwlagn_tx_skb(struct iwl_priv *priv, |
| struct ieee80211_sta *sta, |
| struct sk_buff *skb) |
| { |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| struct iwl_station_priv *sta_priv = NULL; |
| struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
| struct iwl_device_cmd *dev_cmd; |
| struct iwl_tx_cmd *tx_cmd; |
| __le16 fc; |
| u8 hdr_len; |
| u16 len, seq_number = 0; |
| u8 sta_id, tid = IWL_MAX_TID_COUNT; |
| bool is_agg = false, is_data_qos = false; |
| int txq_id; |
| |
| if (info->control.vif) |
| ctx = iwl_rxon_ctx_from_vif(info->control.vif); |
| |
| if (iwl_is_rfkill(priv)) { |
| IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); |
| goto drop_unlock_priv; |
| } |
| |
| fc = hdr->frame_control; |
| |
| #ifdef CONFIG_IWLWIFI_DEBUG |
| if (ieee80211_is_auth(fc)) |
| IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); |
| else if (ieee80211_is_assoc_req(fc)) |
| IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); |
| else if (ieee80211_is_reassoc_req(fc)) |
| IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); |
| #endif |
| |
| if (unlikely(ieee80211_is_probe_resp(fc))) { |
| struct iwl_wipan_noa_data *noa_data = |
| rcu_dereference(priv->noa_data); |
| |
| if (noa_data && |
| pskb_expand_head(skb, 0, noa_data->length, |
| GFP_ATOMIC) == 0) { |
| memcpy(skb_put(skb, noa_data->length), |
| noa_data->data, noa_data->length); |
| hdr = (struct ieee80211_hdr *)skb->data; |
| } |
| } |
| |
| hdr_len = ieee80211_hdrlen(fc); |
| |
| /* For management frames use broadcast id to do not break aggregation */ |
| if (!ieee80211_is_data(fc)) |
| sta_id = ctx->bcast_sta_id; |
| else { |
| /* Find index into station table for destination station */ |
| sta_id = iwl_sta_id_or_broadcast(ctx, sta); |
| if (sta_id == IWL_INVALID_STATION) { |
| IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", |
| hdr->addr1); |
| goto drop_unlock_priv; |
| } |
| } |
| |
| if (sta) |
| sta_priv = (void *)sta->drv_priv; |
| |
| if (sta_priv && sta_priv->asleep && |
| (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { |
| /* |
| * This sends an asynchronous command to the device, |
| * but we can rely on it being processed before the |
| * next frame is processed -- and the next frame to |
| * this station is the one that will consume this |
| * counter. |
| * For now set the counter to just 1 since we do not |
| * support uAPSD yet. |
| * |
| * FIXME: If we get two non-bufferable frames one |
| * after the other, we might only send out one of |
| * them because this is racy. |
| */ |
| iwl_sta_modify_sleep_tx_count(priv, sta_id, 1); |
| } |
| |
| dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans); |
| |
| if (unlikely(!dev_cmd)) |
| goto drop_unlock_priv; |
| |
| memset(dev_cmd, 0, sizeof(*dev_cmd)); |
| dev_cmd->hdr.cmd = REPLY_TX; |
| tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload; |
| |
| /* Total # bytes to be transmitted */ |
| len = (u16)skb->len; |
| tx_cmd->len = cpu_to_le16(len); |
| |
| if (info->control.hw_key) |
| iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb); |
| |
| /* TODO need this for burst mode later on */ |
| iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); |
| |
| iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc); |
| |
| memset(&info->status, 0, sizeof(info->status)); |
| memset(info->driver_data, 0, sizeof(info->driver_data)); |
| |
| info->driver_data[0] = ctx; |
| info->driver_data[1] = dev_cmd; |
| /* From now on, we cannot access info->control */ |
| |
| spin_lock(&priv->sta_lock); |
| |
| if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { |
| u8 *qc = NULL; |
| struct iwl_tid_data *tid_data; |
| 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; |
| tid_data = &priv->tid_data[sta_id][tid]; |
| |
| /* aggregation is on for this <sta,tid> */ |
| if (info->flags & IEEE80211_TX_CTL_AMPDU && |
| tid_data->agg.state != IWL_AGG_ON) { |
| IWL_ERR(priv, |
| "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n", |
| info->flags, tid_data->agg.state); |
| IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n", |
| sta_id, tid, |
| IEEE80211_SEQ_TO_SN(tid_data->seq_number)); |
| goto drop_unlock_sta; |
| } |
| |
| /* We can receive packets from the stack in IWL_AGG_{ON,OFF} |
| * only. Check this here. |
| */ |
| if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON && |
| tid_data->agg.state != IWL_AGG_OFF, |
| "Tx while agg.state = %d\n", tid_data->agg.state)) |
| goto drop_unlock_sta; |
| |
| seq_number = tid_data->seq_number; |
| seq_number &= IEEE80211_SCTL_SEQ; |
| hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
| hdr->seq_ctrl |= cpu_to_le16(seq_number); |
| seq_number += 0x10; |
| |
| if (info->flags & IEEE80211_TX_CTL_AMPDU) |
| is_agg = true; |
| is_data_qos = true; |
| } |
| |
| /* Copy MAC header from skb into command buffer */ |
| memcpy(tx_cmd->hdr, hdr, hdr_len); |
| |
| txq_id = info->hw_queue; |
| |
| if (is_agg) |
| txq_id = priv->tid_data[sta_id][tid].agg.txq_id; |
| else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { |
| /* |
| * The microcode will clear the more data |
| * bit in the last frame it transmits. |
| */ |
| hdr->frame_control |= |
| cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
| } |
| |
| WARN_ON_ONCE(is_agg && |
| priv->queue_to_mac80211[txq_id] != info->hw_queue); |
| |
| IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid, |
| txq_id, seq_number); |
| |
| if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id)) |
| goto drop_unlock_sta; |
| |
| if (is_data_qos && !ieee80211_has_morefrags(fc)) |
| priv->tid_data[sta_id][tid].seq_number = seq_number; |
| |
| spin_unlock(&priv->sta_lock); |
| |
| /* |
| * Avoid atomic ops if it isn't an associated client. |
| * Also, if this is a packet for aggregation, don't |
| * increase the counter because the ucode will stop |
| * aggregation queues when their respective station |
| * goes to sleep. |
| */ |
| if (sta_priv && sta_priv->client && !is_agg) |
| atomic_inc(&sta_priv->pending_frames); |
| |
| return 0; |
| |
| drop_unlock_sta: |
| if (dev_cmd) |
| iwl_trans_free_tx_cmd(priv->trans, dev_cmd); |
| spin_unlock(&priv->sta_lock); |
| drop_unlock_priv: |
| return -1; |
| } |
| |
| static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq) |
| { |
| int q; |
| |
| for (q = IWLAGN_FIRST_AMPDU_QUEUE; |
| q < priv->cfg->base_params->num_of_queues; q++) { |
| if (!test_and_set_bit(q, priv->agg_q_alloc)) { |
| priv->queue_to_mac80211[q] = mq; |
| return q; |
| } |
| } |
| |
| return -ENOSPC; |
| } |
| |
| static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q) |
| { |
| clear_bit(q, priv->agg_q_alloc); |
| priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE; |
| } |
| |
| int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta, u16 tid) |
| { |
| struct iwl_tid_data *tid_data; |
| int sta_id, txq_id; |
| enum iwl_agg_state agg_state; |
| |
| sta_id = iwl_sta_id(sta); |
| |
| if (sta_id == IWL_INVALID_STATION) { |
| IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); |
| return -ENXIO; |
| } |
| |
| spin_lock_bh(&priv->sta_lock); |
| |
| tid_data = &priv->tid_data[sta_id][tid]; |
| txq_id = tid_data->agg.txq_id; |
| |
| switch (tid_data->agg.state) { |
| case IWL_EMPTYING_HW_QUEUE_ADDBA: |
| /* |
| * This can happen if the peer stops aggregation |
| * again before we've had a chance to drain the |
| * queue we selected previously, i.e. before the |
| * session was really started completely. |
| */ |
| IWL_DEBUG_HT(priv, "AGG stop before setup done\n"); |
| goto turn_off; |
| case IWL_AGG_STARTING: |
| /* |
| * This can happen when the session is stopped before |
| * we receive ADDBA response |
| */ |
| IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n"); |
| goto turn_off; |
| case IWL_AGG_ON: |
| break; |
| default: |
| IWL_WARN(priv, |
| "Stopping AGG while state not ON or starting for %d on %d (%d)\n", |
| sta_id, tid, tid_data->agg.state); |
| spin_unlock_bh(&priv->sta_lock); |
| return 0; |
| } |
| |
| tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); |
| |
| /* There are still packets for this RA / TID in the HW */ |
| if (!test_bit(txq_id, priv->agg_q_alloc)) { |
| IWL_DEBUG_TX_QUEUES(priv, |
| "stopping AGG on STA/TID %d/%d but hwq %d not used\n", |
| sta_id, tid, txq_id); |
| } else if (tid_data->agg.ssn != tid_data->next_reclaimed) { |
| IWL_DEBUG_TX_QUEUES(priv, |
| "Can't proceed: ssn %d, next_recl = %d\n", |
| tid_data->agg.ssn, |
| tid_data->next_reclaimed); |
| tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA; |
| spin_unlock_bh(&priv->sta_lock); |
| return 0; |
| } |
| |
| IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", |
| tid_data->agg.ssn); |
| turn_off: |
| agg_state = tid_data->agg.state; |
| tid_data->agg.state = IWL_AGG_OFF; |
| |
| spin_unlock_bh(&priv->sta_lock); |
| |
| if (test_bit(txq_id, priv->agg_q_alloc)) { |
| /* |
| * If the transport didn't know that we wanted to start |
| * agreggation, don't tell it that we want to stop them. |
| * This can happen when we don't get the addBA response on |
| * time, or we hadn't time to drain the AC queues. |
| */ |
| if (agg_state == IWL_AGG_ON) |
| iwl_trans_txq_disable(priv->trans, txq_id, true); |
| else |
| IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", |
| agg_state); |
| iwlagn_dealloc_agg_txq(priv, txq_id); |
| } |
| |
| ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
| |
| return 0; |
| } |
| |
| int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta, u16 tid, u16 *ssn) |
| { |
| struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); |
| struct iwl_tid_data *tid_data; |
| int sta_id, txq_id, ret; |
| |
| IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", |
| sta->addr, tid); |
| |
| sta_id = iwl_sta_id(sta); |
| if (sta_id == IWL_INVALID_STATION) { |
| IWL_ERR(priv, "Start AGG on invalid station\n"); |
| return -ENXIO; |
| } |
| if (unlikely(tid >= IWL_MAX_TID_COUNT)) |
| return -EINVAL; |
| |
| if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) { |
| IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); |
| return -ENXIO; |
| } |
| |
| txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]); |
| if (txq_id < 0) { |
| IWL_DEBUG_TX_QUEUES(priv, |
| "No free aggregation queue for %pM/%d\n", |
| sta->addr, tid); |
| return txq_id; |
| } |
| |
| ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); |
| if (ret) |
| return ret; |
| |
| spin_lock_bh(&priv->sta_lock); |
| tid_data = &priv->tid_data[sta_id][tid]; |
| tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); |
| tid_data->agg.txq_id = txq_id; |
| |
| *ssn = tid_data->agg.ssn; |
| |
| if (*ssn == tid_data->next_reclaimed) { |
| IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", |
| tid_data->agg.ssn); |
| tid_data->agg.state = IWL_AGG_STARTING; |
| ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
| } else { |
| IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, " |
| "next_reclaimed = %d\n", |
| tid_data->agg.ssn, |
| tid_data->next_reclaimed); |
| tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; |
| } |
| spin_unlock_bh(&priv->sta_lock); |
| |
| return ret; |
| } |
| |
| int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta, u16 tid) |
| { |
| struct iwl_tid_data *tid_data; |
| enum iwl_agg_state agg_state; |
| int sta_id, txq_id; |
| sta_id = iwl_sta_id(sta); |
| |
| /* |
| * First set the agg state to OFF to avoid calling |
| * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty. |
| */ |
| spin_lock_bh(&priv->sta_lock); |
| |
| tid_data = &priv->tid_data[sta_id][tid]; |
| txq_id = tid_data->agg.txq_id; |
| agg_state = tid_data->agg.state; |
| IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n", |
| sta_id, tid, txq_id, tid_data->agg.state); |
| |
| tid_data->agg.state = IWL_AGG_OFF; |
| |
| spin_unlock_bh(&priv->sta_lock); |
| |
| if (iwlagn_txfifo_flush(priv, BIT(txq_id))) |
| IWL_ERR(priv, "Couldn't flush the AGG queue\n"); |
| |
| if (test_bit(txq_id, priv->agg_q_alloc)) { |
| /* |
| * If the transport didn't know that we wanted to start |
| * agreggation, don't tell it that we want to stop them. |
| * This can happen when we don't get the addBA response on |
| * time, or we hadn't time to drain the AC queues. |
| */ |
| if (agg_state == IWL_AGG_ON) |
| iwl_trans_txq_disable(priv->trans, txq_id, true); |
| else |
| IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", |
| agg_state); |
| iwlagn_dealloc_agg_txq(priv, txq_id); |
| } |
| |
| return 0; |
| } |
| |
| int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta, u16 tid, u8 buf_size) |
| { |
| struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; |
| struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); |
| int q, fifo; |
| u16 ssn; |
| |
| buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); |
| |
| spin_lock_bh(&priv->sta_lock); |
| ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn; |
| q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id; |
| priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON; |
| spin_unlock_bh(&priv->sta_lock); |
| |
| fifo = ctx->ac_to_fifo[tid_to_ac[tid]]; |
| |
| iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid, |
| buf_size, ssn, 0); |
| |
| /* |
| * If the limit is 0, then it wasn't initialised yet, |
| * use the default. We can do that since we take the |
| * minimum below, and we don't want to go above our |
| * default due to hardware restrictions. |
| */ |
| if (sta_priv->max_agg_bufsize == 0) |
| sta_priv->max_agg_bufsize = |
| LINK_QUAL_AGG_FRAME_LIMIT_DEF; |
| |
| /* |
| * Even though in theory the peer could have different |
| * aggregation reorder buffer sizes for different sessions, |
| * our ucode doesn't allow for that and has a global limit |
| * for each station. Therefore, use the minimum of all the |
| * aggregation sessions and our default value. |
| */ |
| sta_priv->max_agg_bufsize = |
| min(sta_priv->max_agg_bufsize, buf_size); |
| |
| if (priv->hw_params.use_rts_for_aggregation) { |
| /* |
| * switch to RTS/CTS if it is the prefer protection |
| * method for HT traffic |
| */ |
| |
| sta_priv->lq_sta.lq.general_params.flags |= |
| LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; |
| } |
| priv->agg_tids_count++; |
| IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", |
| priv->agg_tids_count); |
| |
| sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit = |
| sta_priv->max_agg_bufsize; |
| |
| IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n", |
| sta->addr, tid); |
| |
| return iwl_send_lq_cmd(priv, ctx, |
| &sta_priv->lq_sta.lq, CMD_ASYNC, false); |
| } |
| |
| static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid) |
| { |
| struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid]; |
| enum iwl_rxon_context_id ctx; |
| struct ieee80211_vif *vif; |
| u8 *addr; |
| |
| lockdep_assert_held(&priv->sta_lock); |
| |
| addr = priv->stations[sta_id].sta.sta.addr; |
| ctx = priv->stations[sta_id].ctxid; |
| vif = priv->contexts[ctx].vif; |
| |
| switch (priv->tid_data[sta_id][tid].agg.state) { |
| case IWL_EMPTYING_HW_QUEUE_DELBA: |
| /* There are no packets for this RA / TID in the HW any more */ |
| if (tid_data->agg.ssn == tid_data->next_reclaimed) { |
| IWL_DEBUG_TX_QUEUES(priv, |
| "Can continue DELBA flow ssn = next_recl = %d\n", |
| tid_data->next_reclaimed); |
| iwl_trans_txq_disable(priv->trans, |
| tid_data->agg.txq_id, true); |
| iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id); |
| tid_data->agg.state = IWL_AGG_OFF; |
| ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid); |
| } |
| break; |
| case IWL_EMPTYING_HW_QUEUE_ADDBA: |
| /* There are no packets for this RA / TID in the HW any more */ |
| if (tid_data->agg.ssn == tid_data->next_reclaimed) { |
| IWL_DEBUG_TX_QUEUES(priv, |
| "Can continue ADDBA flow ssn = next_recl = %d\n", |
| tid_data->next_reclaimed); |
| tid_data->agg.state = IWL_AGG_STARTING; |
| ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid); |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx, |
| const u8 *addr1) |
| { |
| struct ieee80211_sta *sta; |
| struct iwl_station_priv *sta_priv; |
| |
| rcu_read_lock(); |
| sta = ieee80211_find_sta(ctx->vif, addr1); |
| if (sta) { |
| sta_priv = (void *)sta->drv_priv; |
| /* avoid atomic ops if this isn't a client */ |
| if (sta_priv->client && |
| atomic_dec_return(&sta_priv->pending_frames) == 0) |
| ieee80211_sta_block_awake(priv->hw, sta, false); |
| } |
| rcu_read_unlock(); |
| } |
| |
| /** |
| * translate ucode response to mac80211 tx status control values |
| */ |
| static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, 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); |
| if (rate_n_flags & RATE_MCS_HT_MSK) |
| r->flags |= IEEE80211_TX_RC_MCS; |
| if (rate_n_flags & RATE_MCS_GF_MSK) |
| r->flags |= IEEE80211_TX_RC_GREEN_FIELD; |
| if (rate_n_flags & RATE_MCS_HT40_MSK) |
| r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
| if (rate_n_flags & RATE_MCS_DUP_MSK) |
| r->flags |= IEEE80211_TX_RC_DUP_DATA; |
| if (rate_n_flags & RATE_MCS_SGI_MSK) |
| r->flags |= IEEE80211_TX_RC_SHORT_GI; |
| r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); |
| } |
| |
| #ifdef CONFIG_IWLWIFI_DEBUG |
| const char *iwl_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(FIFO_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(INSUFFICIENT_CF_POLL); |
| TX_STATUS_FAIL(PASSIVE_NO_RX); |
| TX_STATUS_FAIL(NO_BEACON_ON_RADAR); |
| } |
| |
| return "UNKNOWN"; |
| |
| #undef TX_STATUS_FAIL |
| #undef TX_STATUS_POSTPONE |
| } |
| #endif /* CONFIG_IWLWIFI_DEBUG */ |
| |
| static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status) |
| { |
| status &= AGG_TX_STATUS_MSK; |
| |
| switch (status) { |
| case AGG_TX_STATE_UNDERRUN_MSK: |
| priv->reply_agg_tx_stats.underrun++; |
| break; |
| case AGG_TX_STATE_BT_PRIO_MSK: |
| priv->reply_agg_tx_stats.bt_prio++; |
| break; |
| case AGG_TX_STATE_FEW_BYTES_MSK: |
| priv->reply_agg_tx_stats.few_bytes++; |
| break; |
| case AGG_TX_STATE_ABORT_MSK: |
| priv->reply_agg_tx_stats.abort++; |
| break; |
| case AGG_TX_STATE_LAST_SENT_TTL_MSK: |
| priv->reply_agg_tx_stats.last_sent_ttl++; |
| break; |
| case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK: |
| priv->reply_agg_tx_stats.last_sent_try++; |
| break; |
| case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK: |
| priv->reply_agg_tx_stats.last_sent_bt_kill++; |
| break; |
| case AGG_TX_STATE_SCD_QUERY_MSK: |
| priv->reply_agg_tx_stats.scd_query++; |
| break; |
| case AGG_TX_STATE_TEST_BAD_CRC32_MSK: |
| priv->reply_agg_tx_stats.bad_crc32++; |
| break; |
| case AGG_TX_STATE_RESPONSE_MSK: |
| priv->reply_agg_tx_stats.response++; |
| break; |
| case AGG_TX_STATE_DUMP_TX_MSK: |
| priv->reply_agg_tx_stats.dump_tx++; |
| break; |
| case AGG_TX_STATE_DELAY_TX_MSK: |
| priv->reply_agg_tx_stats.delay_tx++; |
| break; |
| default: |
| priv->reply_agg_tx_stats.unknown++; |
| break; |
| } |
| } |
| |
| static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp) |
| { |
| return le32_to_cpup((__le32 *)&tx_resp->status + |
| tx_resp->frame_count) & IEEE80211_MAX_SN; |
| } |
| |
| static void iwl_rx_reply_tx_agg(struct iwl_priv *priv, |
| struct iwlagn_tx_resp *tx_resp) |
| { |
| struct agg_tx_status *frame_status = &tx_resp->status; |
| int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> |
| IWLAGN_TX_RES_TID_POS; |
| int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> |
| IWLAGN_TX_RES_RA_POS; |
| struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg; |
| u32 status = le16_to_cpu(tx_resp->status.status); |
| int i; |
| |
| WARN_ON(tid == IWL_TID_NON_QOS); |
| |
| if (agg->wait_for_ba) |
| IWL_DEBUG_TX_REPLY(priv, |
| "got tx response w/o block-ack\n"); |
| |
| agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); |
| agg->wait_for_ba = (tx_resp->frame_count > 1); |
| |
| /* |
| * If the BT kill count is non-zero, we'll get this |
| * notification again. |
| */ |
| if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && |
| priv->lib->bt_params && |
| priv->lib->bt_params->advanced_bt_coexist) { |
| IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n"); |
| } |
| |
| if (tx_resp->frame_count == 1) |
| return; |
| |
| IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n", |
| agg->txq_id, |
| le32_to_cpu(tx_resp->rate_n_flags), |
| iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count); |
| |
| /* Construct bit-map of pending frames within Tx window */ |
| for (i = 0; i < tx_resp->frame_count; i++) { |
| u16 fstatus = le16_to_cpu(frame_status[i].status); |
| u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS; |
| |
| if (status & AGG_TX_STATUS_MSK) |
| iwlagn_count_agg_tx_err_status(priv, fstatus); |
| |
| if (status & (AGG_TX_STATE_FEW_BYTES_MSK | |
| AGG_TX_STATE_ABORT_MSK)) |
| continue; |
| |
| if (status & AGG_TX_STATUS_MSK || retry_cnt > 1) |
| IWL_DEBUG_TX_REPLY(priv, |
| "%d: status %s (0x%04x), try-count (0x%01x)\n", |
| i, |
| iwl_get_agg_tx_fail_reason(fstatus), |
| fstatus & AGG_TX_STATUS_MSK, |
| retry_cnt); |
| } |
| } |
| |
| #ifdef CONFIG_IWLWIFI_DEBUG |
| #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x |
| |
| const char *iwl_get_agg_tx_fail_reason(u16 status) |
| { |
| status &= AGG_TX_STATUS_MSK; |
| switch (status) { |
| case AGG_TX_STATE_TRANSMITTED: |
| return "SUCCESS"; |
| AGG_TX_STATE_FAIL(UNDERRUN_MSK); |
| AGG_TX_STATE_FAIL(BT_PRIO_MSK); |
| AGG_TX_STATE_FAIL(FEW_BYTES_MSK); |
| AGG_TX_STATE_FAIL(ABORT_MSK); |
| AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK); |
| AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK); |
| AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK); |
| AGG_TX_STATE_FAIL(SCD_QUERY_MSK); |
| AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK); |
| AGG_TX_STATE_FAIL(RESPONSE_MSK); |
| AGG_TX_STATE_FAIL(DUMP_TX_MSK); |
| AGG_TX_STATE_FAIL(DELAY_TX_MSK); |
| } |
| |
| return "UNKNOWN"; |
| } |
| #endif /* CONFIG_IWLWIFI_DEBUG */ |
| |
| static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status) |
| { |
| status &= TX_STATUS_MSK; |
| |
| switch (status) { |
| case TX_STATUS_POSTPONE_DELAY: |
| priv->reply_tx_stats.pp_delay++; |
| break; |
| case TX_STATUS_POSTPONE_FEW_BYTES: |
| priv->reply_tx_stats.pp_few_bytes++; |
| break; |
| case TX_STATUS_POSTPONE_BT_PRIO: |
| priv->reply_tx_stats.pp_bt_prio++; |
| break; |
| case TX_STATUS_POSTPONE_QUIET_PERIOD: |
| priv->reply_tx_stats.pp_quiet_period++; |
| break; |
| case TX_STATUS_POSTPONE_CALC_TTAK: |
| priv->reply_tx_stats.pp_calc_ttak++; |
| break; |
| case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY: |
| priv->reply_tx_stats.int_crossed_retry++; |
| break; |
| case TX_STATUS_FAIL_SHORT_LIMIT: |
| priv->reply_tx_stats.short_limit++; |
| break; |
| case TX_STATUS_FAIL_LONG_LIMIT: |
| priv->reply_tx_stats.long_limit++; |
| break; |
| case TX_STATUS_FAIL_FIFO_UNDERRUN: |
| priv->reply_tx_stats.fifo_underrun++; |
| break; |
| case TX_STATUS_FAIL_DRAIN_FLOW: |
| priv->reply_tx_stats.drain_flow++; |
| break; |
| case TX_STATUS_FAIL_RFKILL_FLUSH: |
| priv->reply_tx_stats.rfkill_flush++; |
| break; |
| case TX_STATUS_FAIL_LIFE_EXPIRE: |
| priv->reply_tx_stats.life_expire++; |
| break; |
| case TX_STATUS_FAIL_DEST_PS: |
| priv->reply_tx_stats.dest_ps++; |
| break; |
| case TX_STATUS_FAIL_HOST_ABORTED: |
| priv->reply_tx_stats.host_abort++; |
| break; |
| case TX_STATUS_FAIL_BT_RETRY: |
| priv->reply_tx_stats.bt_retry++; |
| break; |
| case TX_STATUS_FAIL_STA_INVALID: |
| priv->reply_tx_stats.sta_invalid++; |
| break; |
| case TX_STATUS_FAIL_FRAG_DROPPED: |
| priv->reply_tx_stats.frag_drop++; |
| break; |
| case TX_STATUS_FAIL_TID_DISABLE: |
| priv->reply_tx_stats.tid_disable++; |
| break; |
| case TX_STATUS_FAIL_FIFO_FLUSHED: |
| priv->reply_tx_stats.fifo_flush++; |
| break; |
| case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL: |
| priv->reply_tx_stats.insuff_cf_poll++; |
| break; |
| case TX_STATUS_FAIL_PASSIVE_NO_RX: |
| priv->reply_tx_stats.fail_hw_drop++; |
| break; |
| case TX_STATUS_FAIL_NO_BEACON_ON_RADAR: |
| priv->reply_tx_stats.sta_color_mismatch++; |
| break; |
| default: |
| priv->reply_tx_stats.unknown++; |
| break; |
| } |
| } |
| |
| static void iwlagn_set_tx_status(struct iwl_priv *priv, |
| struct ieee80211_tx_info *info, |
| struct iwlagn_tx_resp *tx_resp) |
| { |
| u16 status = le16_to_cpu(tx_resp->status.status); |
| |
| info->flags &= ~IEEE80211_TX_CTL_AMPDU; |
| |
| info->status.rates[0].count = tx_resp->failure_frame + 1; |
| info->flags |= iwl_tx_status_to_mac80211(status); |
| iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), |
| info); |
| if (!iwl_is_tx_success(status)) |
| iwlagn_count_tx_err_status(priv, status); |
| } |
| |
| static void iwl_check_abort_status(struct iwl_priv *priv, |
| u8 frame_count, u32 status) |
| { |
| if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { |
| IWL_ERR(priv, "Tx flush command to flush out all frames\n"); |
| if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) |
| queue_work(priv->workqueue, &priv->tx_flush); |
| } |
| } |
| |
| void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb) |
| { |
| struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| u16 sequence = le16_to_cpu(pkt->hdr.sequence); |
| int txq_id = SEQ_TO_QUEUE(sequence); |
| int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence); |
| struct iwlagn_tx_resp *tx_resp = (void *)pkt->data; |
| struct ieee80211_hdr *hdr; |
| u32 status = le16_to_cpu(tx_resp->status.status); |
| u16 ssn = iwlagn_get_scd_ssn(tx_resp); |
| int tid; |
| int sta_id; |
| int freed; |
| struct ieee80211_tx_info *info; |
| struct sk_buff_head skbs; |
| struct sk_buff *skb; |
| struct iwl_rxon_context *ctx; |
| bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE); |
| |
| tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> |
| IWLAGN_TX_RES_TID_POS; |
| sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> |
| IWLAGN_TX_RES_RA_POS; |
| |
| spin_lock_bh(&priv->sta_lock); |
| |
| if (is_agg) { |
| WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT || |
| tid >= IWL_MAX_TID_COUNT); |
| if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id) |
| IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id, |
| priv->tid_data[sta_id][tid].agg.txq_id); |
| iwl_rx_reply_tx_agg(priv, tx_resp); |
| } |
| |
| __skb_queue_head_init(&skbs); |
| |
| if (tx_resp->frame_count == 1) { |
| u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl); |
| next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10); |
| |
| if (is_agg) { |
| /* If this is an aggregation queue, we can rely on the |
| * ssn since the wifi sequence number corresponds to |
| * the index in the TFD ring (%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. |
| */ |
| next_reclaimed = ssn; |
| } |
| |
| if (tid != IWL_TID_NON_QOS) { |
| priv->tid_data[sta_id][tid].next_reclaimed = |
| next_reclaimed; |
| IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n", |
| next_reclaimed); |
| } |
| |
| iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs); |
| |
| iwlagn_check_ratid_empty(priv, sta_id, tid); |
| freed = 0; |
| |
| /* process frames */ |
| skb_queue_walk(&skbs, skb) { |
| hdr = (struct ieee80211_hdr *)skb->data; |
| |
| if (!ieee80211_is_data_qos(hdr->frame_control)) |
| priv->last_seq_ctl = tx_resp->seq_ctl; |
| |
| info = IEEE80211_SKB_CB(skb); |
| ctx = info->driver_data[0]; |
| iwl_trans_free_tx_cmd(priv->trans, |
| info->driver_data[1]); |
| |
| memset(&info->status, 0, sizeof(info->status)); |
| |
| if (status == TX_STATUS_FAIL_PASSIVE_NO_RX && |
| ctx->vif && |
| ctx->vif->type == NL80211_IFTYPE_STATION) { |
| /* block and stop all queues */ |
| priv->passive_no_rx = true; |
| IWL_DEBUG_TX_QUEUES(priv, |
| "stop all queues: passive channel\n"); |
| ieee80211_stop_queues(priv->hw); |
| |
| IWL_DEBUG_TX_REPLY(priv, |
| "TXQ %d status %s (0x%08x) " |
| "rate_n_flags 0x%x retries %d\n", |
| txq_id, |
| iwl_get_tx_fail_reason(status), |
| status, |
| le32_to_cpu(tx_resp->rate_n_flags), |
| tx_resp->failure_frame); |
| |
| IWL_DEBUG_TX_REPLY(priv, |
| "FrameCnt = %d, idx=%d\n", |
| tx_resp->frame_count, cmd_index); |
| } |
| |
| /* check if BAR is needed */ |
| if (is_agg && !iwl_is_tx_success(status)) |
| info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
| iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb), |
| tx_resp); |
| if (!is_agg) |
| iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1); |
| |
| freed++; |
| } |
| |
| if (tid != IWL_TID_NON_QOS) { |
| priv->tid_data[sta_id][tid].next_reclaimed = |
| next_reclaimed; |
| IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n", |
| next_reclaimed); |
| } |
| |
| if (!is_agg && freed != 1) |
| IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed); |
| |
| IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id, |
| iwl_get_tx_fail_reason(status), status); |
| |
| IWL_DEBUG_TX_REPLY(priv, |
| "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n", |
| le32_to_cpu(tx_resp->rate_n_flags), |
| tx_resp->failure_frame, |
| SEQ_TO_INDEX(sequence), ssn, |
| le16_to_cpu(tx_resp->seq_ctl)); |
| } |
| |
| iwl_check_abort_status(priv, tx_resp->frame_count, status); |
| spin_unlock_bh(&priv->sta_lock); |
| |
| while (!skb_queue_empty(&skbs)) { |
| skb = __skb_dequeue(&skbs); |
| ieee80211_tx_status(priv->hw, skb); |
| } |
| } |
| |
| /** |
| * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA |
| * |
| * Handles block-acknowledge notification from device, which reports success |
| * of frames sent via aggregation. |
| */ |
| void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, |
| struct iwl_rx_cmd_buffer *rxb) |
| { |
| struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data; |
| struct iwl_ht_agg *agg; |
| struct sk_buff_head reclaimed_skbs; |
| struct sk_buff *skb; |
| int sta_id; |
| int tid; |
| int freed; |
| |
| /* "flow" corresponds to Tx queue */ |
| u16 scd_flow = le16_to_cpu(ba_resp->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_resp->scd_ssn); |
| |
| if (scd_flow >= priv->cfg->base_params->num_of_queues) { |
| IWL_ERR(priv, |
| "BUG_ON scd_flow is bigger than number of queues\n"); |
| return; |
| } |
| |
| sta_id = ba_resp->sta_id; |
| tid = ba_resp->tid; |
| agg = &priv->tid_data[sta_id][tid].agg; |
| |
| spin_lock_bh(&priv->sta_lock); |
| |
| if (unlikely(!agg->wait_for_ba)) { |
| if (unlikely(ba_resp->bitmap)) |
| IWL_ERR(priv, "Received BA when not expected\n"); |
| spin_unlock_bh(&priv->sta_lock); |
| return; |
| } |
| |
| if (unlikely(scd_flow != agg->txq_id)) { |
| /* |
| * FIXME: this is a uCode bug which need to be addressed, |
| * log the information and return for now. |
| * Since it is can possibly happen very often and in order |
| * not to fill the syslog, don't use IWL_ERR or IWL_WARN |
| */ |
| IWL_DEBUG_TX_QUEUES(priv, |
| "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n", |
| scd_flow, sta_id, tid, agg->txq_id); |
| spin_unlock_bh(&priv->sta_lock); |
| 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(priv->trans, scd_flow, ba_resp_scd_ssn, |
| &reclaimed_skbs); |
| |
| IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " |
| "sta_id = %d\n", |
| agg->wait_for_ba, |
| (u8 *) &ba_resp->sta_addr_lo32, |
| ba_resp->sta_id); |
| IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, " |
| "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", |
| ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl), |
| (unsigned long long)le64_to_cpu(ba_resp->bitmap), |
| scd_flow, ba_resp_scd_ssn, ba_resp->txed, |
| ba_resp->txed_2_done); |
| |
| /* Mark that the expected block-ack response arrived */ |
| agg->wait_for_ba = false; |
| |
| /* Sanity check values reported by uCode */ |
| if (ba_resp->txed_2_done > ba_resp->txed) { |
| IWL_DEBUG_TX_REPLY(priv, |
| "bogus sent(%d) and ack(%d) count\n", |
| ba_resp->txed, ba_resp->txed_2_done); |
| /* |
| * set txed_2_done = txed, |
| * so it won't impact rate scale |
| */ |
| ba_resp->txed = ba_resp->txed_2_done; |
| } |
| |
| priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn; |
| |
| iwlagn_check_ratid_empty(priv, sta_id, 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(priv->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; |
| |
| if (freed == 1) { |
| /* this is the first skb we deliver in this batch */ |
| /* put the rate scaling data there */ |
| info = IEEE80211_SKB_CB(skb); |
| memset(&info->status, 0, sizeof(info->status)); |
| info->flags |= IEEE80211_TX_STAT_AMPDU; |
| info->status.ampdu_ack_len = ba_resp->txed_2_done; |
| info->status.ampdu_len = ba_resp->txed; |
| iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, |
| info); |
| } |
| } |
| |
| spin_unlock_bh(&priv->sta_lock); |
| |
| while (!skb_queue_empty(&reclaimed_skbs)) { |
| skb = __skb_dequeue(&reclaimed_skbs); |
| ieee80211_tx_status(priv->hw, skb); |
| } |
| } |