Commit 8b30b1fe authored by Sujith's avatar Sujith Committed by John W. Linville

mac80211: Re-enable aggregation

Wireless HW without any dedicated queues for aggregation
do not need the ampdu_queues mechanism present right now
in mac80211. Since mac80211 is still incomplete wrt TX MQ
changes, do not allow aggregation sessions for drivers that
set ampdu_queues.

This is only an interim hack until Intel fixes the requeue issue.
Signed-off-by: default avatarSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: default avatarLuis Rodriguez <Luis.Rodriguez@Atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 4393dce9
......@@ -953,10 +953,7 @@ static int ath_attach(u16 devid,
&sc->sbands[IEEE80211_BAND_5GHZ];
}
/* FIXME: Have to figure out proper hw init values later */
hw->queues = 4;
hw->ampdu_queues = 1;
/* Register rate control */
hw->rate_control_algorithm = "ath9k_rate_control";
......@@ -1745,7 +1742,8 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_NOISE_DBM;
IEEE80211_HW_NOISE_DBM |
IEEE80211_HW_AMPDU_AGGREGATION;
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_AP) |
......
......@@ -871,7 +871,8 @@ int iwl_setup_mac(struct iwl_priv *priv)
/* Tell mac80211 our characteristics */
hw->flags = IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_NOISE_DBM;
IEEE80211_HW_NOISE_DBM |
IEEE80211_HW_AMPDU_AGGREGATION;
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_AP) |
BIT(NL80211_IFTYPE_STATION) |
......
......@@ -250,6 +250,9 @@ typedef unsigned char *sk_buff_data_t;
* @tc_verd: traffic control verdict
* @ndisc_nodetype: router type (from link layer)
* @do_not_encrypt: set to prevent encryption of this frame
* @requeue: set to indicate that the wireless core should attempt
* a software retry on this frame if we failed to
* receive an ACK for it
* @dma_cookie: a cookie to one of several possible DMA operations
* done by skb DMA functions
* @secmark: security marking
......@@ -326,6 +329,7 @@ struct sk_buff {
#endif
#if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
__u8 do_not_encrypt:1;
__u8 requeue:1;
#endif
/* 0/13/14 bit hole */
......
......@@ -242,7 +242,6 @@ struct ieee80211_bss_conf {
* @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be
* set by rate control algorithms to indicate probe rate, will
* be cleared for fragmented frames (except on the last fragment)
* @IEEE80211_TX_CTL_REQUEUE: REMOVE THIS
*/
enum mac80211_tx_control_flags {
IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
......@@ -258,9 +257,6 @@ enum mac80211_tx_control_flags {
IEEE80211_TX_STAT_AMPDU = BIT(10),
IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11),
IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12),
/* XXX: remove this */
IEEE80211_TX_CTL_REQUEUE = BIT(13),
};
enum mac80211_rate_control_flags {
......@@ -847,6 +843,9 @@ enum ieee80211_tkip_key_type {
* @IEEE80211_HW_SPECTRUM_MGMT:
* Hardware supports spectrum management defined in 802.11h
* Measurement, Channel Switch, Quieting, TPC
*
* @IEEE80211_HW_AMPDU_AGGREGATION:
* Hardware supports 11n A-MPDU aggregation.
*/
enum ieee80211_hw_flags {
IEEE80211_HW_RX_INCLUDES_FCS = 1<<1,
......@@ -858,6 +857,7 @@ enum ieee80211_hw_flags {
IEEE80211_HW_SIGNAL_DBM = 1<<7,
IEEE80211_HW_NOISE_DBM = 1<<8,
IEEE80211_HW_SPECTRUM_MGMT = 1<<9,
IEEE80211_HW_AMPDU_AGGREGATION = 1<<10,
};
/**
......
......@@ -544,6 +544,7 @@ static struct sk_buff *__skb_clone(struct sk_buff *n, struct sk_buff *skb)
C(truesize);
#if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
C(do_not_encrypt);
C(requeue);
#endif
atomic_set(&n->users, 1);
......
......@@ -458,7 +458,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
u8 *state;
int ret;
if (tid >= STA_TID_NUM)
if ((tid >= STA_TID_NUM) || !(hw->flags & IEEE80211_HW_AMPDU_AGGREGATION))
return -EINVAL;
#ifdef CONFIG_MAC80211_HT_DEBUG
......@@ -515,17 +515,19 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
(unsigned long)&sta->timer_to_tid[tid];
init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
/* create a new queue for this aggregation */
ret = ieee80211_ht_agg_queue_add(local, sta, tid);
if (hw->ampdu_queues) {
/* create a new queue for this aggregation */
ret = ieee80211_ht_agg_queue_add(local, sta, tid);
/* case no queue is available to aggregation
* don't switch to aggregation */
if (ret) {
/* case no queue is available to aggregation
* don't switch to aggregation */
if (ret) {
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "BA request denied - queue unavailable for"
" tid %d\n", tid);
printk(KERN_DEBUG "BA request denied - "
"queue unavailable for tid %d\n", tid);
#endif /* CONFIG_MAC80211_HT_DEBUG */
goto err_unlock_queue;
goto err_unlock_queue;
}
}
sdata = sta->sdata;
......@@ -544,7 +546,8 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
/* No need to requeue the packets in the agg queue, since we
* held the tx lock: no packet could be enqueued to the newly
* allocated queue */
ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
if (hw->ampdu_queues)
ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "BA request denied - HW unavailable for"
" tid %d\n", tid);
......@@ -554,7 +557,8 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
}
/* Will put all the packets in the new SW queue */
ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
if (hw->ampdu_queues)
ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
spin_unlock_bh(&sta->lock);
/* send an addBA request */
......@@ -622,7 +626,8 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
ra, tid);
#endif /* CONFIG_MAC80211_HT_DEBUG */
ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
if (hw->ampdu_queues)
ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
*state = HT_AGG_STATE_REQ_STOP_BA_MSK |
(initiator << HT_AGG_STATE_INITIATOR_SHIFT);
......@@ -635,7 +640,8 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
if (ret) {
WARN_ON(ret != -EBUSY);
*state = HT_AGG_STATE_OPERATIONAL;
ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
if (hw->ampdu_queues)
ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
goto stop_BA_exit;
}
......@@ -691,7 +697,8 @@ void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
#endif
ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
if (hw->ampdu_queues)
ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
}
spin_unlock_bh(&sta->lock);
rcu_read_unlock();
......@@ -745,16 +752,18 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
ieee80211_send_delba(sta->sdata, ra, tid,
WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
agg_queue = sta->tid_to_tx_q[tid];
ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
/* We just requeued the all the frames that were in the
* removed queue, and since we might miss a softirq we do
* netif_schedule_queue. ieee80211_wake_queue is not used
* here as this queue is not necessarily stopped
*/
netif_schedule_queue(netdev_get_tx_queue(local->mdev, agg_queue));
if (hw->ampdu_queues) {
agg_queue = sta->tid_to_tx_q[tid];
ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
/* We just requeued the all the frames that were in the
* removed queue, and since we might miss a softirq we do
* netif_schedule_queue. ieee80211_wake_queue is not used
* here as this queue is not necessarily stopped
*/
netif_schedule_queue(netdev_get_tx_queue(local->mdev,
agg_queue));
}
spin_lock_bh(&sta->lock);
*state = HT_AGG_STATE_IDLE;
sta->ampdu_mlme.addba_req_num[tid] = 0;
......@@ -1011,7 +1020,8 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local,
*state |= HT_ADDBA_RECEIVED_MSK;
sta->ampdu_mlme.addba_req_num[tid] = 0;
if (*state == HT_AGG_STATE_OPERATIONAL)
if (*state == HT_AGG_STATE_OPERATIONAL &&
local->hw.ampdu_queues)
ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
spin_unlock_bh(&sta->lock);
......
......@@ -386,8 +386,6 @@ static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
struct sta_info *sta,
struct sk_buff *skb)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
sta->tx_filtered_count++;
/*
......@@ -434,10 +432,9 @@ static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
return;
}
if (!test_sta_flags(sta, WLAN_STA_PS) &&
!(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
if (!test_sta_flags(sta, WLAN_STA_PS) && !skb->requeue) {
/* Software retry the packet once */
info->flags |= IEEE80211_TX_CTL_REQUEUE;
skb->requeue = 1;
ieee80211_remove_tx_extra(local, sta->key, skb);
dev_queue_xmit(skb);
return;
......
......@@ -669,7 +669,6 @@ static int ap_sta_ps_end(struct sta_info *sta)
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
int sent = 0;
struct ieee80211_tx_info *info;
atomic_dec(&sdata->bss->num_sta_ps);
......@@ -685,13 +684,11 @@ static int ap_sta_ps_end(struct sta_info *sta)
/* Send all buffered frames to the station */
while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) {
info = IEEE80211_SKB_CB(skb);
sent++;
info->flags |= IEEE80211_TX_CTL_REQUEUE;
skb->requeue = 1;
dev_queue_xmit(skb);
}
while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) {
info = IEEE80211_SKB_CB(skb);
local->total_ps_buffered--;
sent++;
#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
......@@ -699,7 +696,7 @@ static int ap_sta_ps_end(struct sta_info *sta)
"since STA not sleeping anymore\n", sdata->dev->name,
sta->sta.addr, sta->sta.aid);
#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
info->flags |= IEEE80211_TX_CTL_REQUEUE;
skb->requeue = 1;
dev_queue_xmit(skb);
}
......
......@@ -661,6 +661,7 @@ ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
static ieee80211_tx_result debug_noinline
ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
size_t hdrlen, per_fragm, num_fragm, payload_len, left;
struct sk_buff **frags, *first, *frag;
......@@ -677,9 +678,7 @@ ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
* This scenario is handled in __ieee80211_tx_prepare but extra
* caution taken here as fragmented ampdu may cause Tx stop.
*/
if (WARN_ON(tx->flags & IEEE80211_TX_CTL_AMPDU ||
skb_get_queue_mapping(tx->skb) >=
ieee80211_num_regular_queues(&tx->local->hw)))
if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
return TX_DROP;
first = tx->skb;
......@@ -951,7 +950,8 @@ __ieee80211_tx_prepare(struct ieee80211_tx_data *tx,
struct ieee80211_sub_if_data *sdata;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
int hdrlen;
int hdrlen, tid;
u8 *qc, *state;
memset(tx, 0, sizeof(*tx));
tx->skb = skb;
......@@ -982,6 +982,15 @@ __ieee80211_tx_prepare(struct ieee80211_tx_data *tx,
tx->sta = sta_info_get(local, hdr->addr1);
if (tx->sta && ieee80211_is_data_qos(hdr->frame_control)) {
qc = ieee80211_get_qos_ctl(hdr);
tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
state = &tx->sta->ampdu_mlme.tid_state_tx[tid];
if (*state == HT_AGG_STATE_OPERATIONAL)
info->flags |= IEEE80211_TX_CTL_AMPDU;
}
if (is_multicast_ether_addr(hdr->addr1)) {
tx->flags &= ~IEEE80211_TX_UNICAST;
info->flags |= IEEE80211_TX_CTL_NO_ACK;
......@@ -1172,7 +1181,7 @@ retry:
* queues, there's no reason for a driver to reject
* a frame there, warn and drop it.
*/
if (WARN_ON(queue >= ieee80211_num_regular_queues(&local->hw)))
if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
goto drop;
store = &local->pending_packet[queue];
......
......@@ -114,8 +114,8 @@ u16 ieee80211_select_queue(struct net_device *dev, struct sk_buff *skb)
{
struct ieee80211_master_priv *mpriv = netdev_priv(dev);
struct ieee80211_local *local = mpriv->local;
struct ieee80211_hw *hw = &local->hw;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct sta_info *sta;
u16 queue;
u8 tid;
......@@ -124,21 +124,19 @@ u16 ieee80211_select_queue(struct net_device *dev, struct sk_buff *skb)
if (unlikely(queue >= local->hw.queues))
queue = local->hw.queues - 1;
if (info->flags & IEEE80211_TX_CTL_REQUEUE) {
if (skb->requeue) {
if (!hw->ampdu_queues)
return queue;
rcu_read_lock();
sta = sta_info_get(local, hdr->addr1);
tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
if (sta) {
struct ieee80211_hw *hw = &local->hw;
int ampdu_queue = sta->tid_to_tx_q[tid];
if ((ampdu_queue < ieee80211_num_queues(hw)) &&
test_bit(ampdu_queue, local->queue_pool)) {
test_bit(ampdu_queue, local->queue_pool))
queue = ampdu_queue;
info->flags |= IEEE80211_TX_CTL_AMPDU;
} else {
info->flags &= ~IEEE80211_TX_CTL_AMPDU;
}
}
rcu_read_unlock();
......@@ -159,20 +157,18 @@ u16 ieee80211_select_queue(struct net_device *dev, struct sk_buff *skb)
*p++ = ack_policy | tid;
*p = 0;
if (!hw->ampdu_queues)
return queue;
rcu_read_lock();
sta = sta_info_get(local, hdr->addr1);
if (sta) {
int ampdu_queue = sta->tid_to_tx_q[tid];
struct ieee80211_hw *hw = &local->hw;
if ((ampdu_queue < ieee80211_num_queues(hw)) &&
test_bit(ampdu_queue, local->queue_pool)) {
test_bit(ampdu_queue, local->queue_pool))
queue = ampdu_queue;
info->flags |= IEEE80211_TX_CTL_AMPDU;
} else {
info->flags &= ~IEEE80211_TX_CTL_AMPDU;
}
}
rcu_read_unlock();
......
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