--- /dev/null
+/******************************************************************************
+ *
+ * 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 <ilw@linux.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 == IEEE80211_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 == IEEE80211_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));
+
+ 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);
+ }
+}
+
+int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
+ struct iwl_device_cmd *cmd)
+{
+ 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);
+ }
+
+ return 0;
+}
+
+/**
+ * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
+ *
+ * Handles block-acknowledge notification from device, which reports success
+ * of frames sent via aggregation.
+ */
+int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
+ struct iwl_rx_cmd_buffer *rxb,
+ struct iwl_device_cmd *cmd)
+{
+ 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 0;
+ }
+
+ 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 0;
+ }
+
+ 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 0;
+ }
+
+ __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);
+ }
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff