summaryrefslogtreecommitdiffstats
path: root/net/mac80211/tx.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/mac80211/tx.c')
-rw-r--r--net/mac80211/tx.c302
1 files changed, 261 insertions, 41 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 203044379ce0..91461c415525 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -24,7 +24,10 @@
#include <net/ieee80211_radiotap.h>
#include <net/cfg80211.h>
#include <net/mac80211.h>
+#include <net/codel.h>
+#include <net/codel_impl.h>
#include <asm/unaligned.h>
+#include <net/fq_impl.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
@@ -590,6 +593,9 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
else if (tx->sta &&
(key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
tx->key = key;
+ else if (ieee80211_is_group_privacy_action(tx->skb) &&
+ (key = rcu_dereference(tx->sdata->default_multicast_key)))
+ tx->key = key;
else if (ieee80211_is_mgmt(hdr->frame_control) &&
is_multicast_ether_addr(hdr->addr1) &&
ieee80211_is_robust_mgmt_frame(tx->skb) &&
@@ -622,7 +628,8 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
case WLAN_CIPHER_SUITE_GCMP_256:
if (!ieee80211_is_data_present(hdr->frame_control) &&
!ieee80211_use_mfp(hdr->frame_control, tx->sta,
- tx->skb))
+ tx->skb) &&
+ !ieee80211_is_group_privacy_action(tx->skb))
tx->key = NULL;
else
skip_hw = (tx->key->conf.flags &
@@ -1236,27 +1243,21 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
return TX_CONTINUE;
}
-static void ieee80211_drv_tx(struct ieee80211_local *local,
- struct ieee80211_vif *vif,
- struct ieee80211_sta *pubsta,
- struct sk_buff *skb)
+static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
+ struct ieee80211_vif *vif,
+ struct ieee80211_sta *pubsta,
+ struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- struct ieee80211_tx_control control = {
- .sta = pubsta,
- };
struct ieee80211_txq *txq = NULL;
- struct txq_info *txqi;
- u8 ac;
if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
(info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
- goto tx_normal;
+ return NULL;
if (!ieee80211_is_data(hdr->frame_control))
- goto tx_normal;
+ return NULL;
if (pubsta) {
u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
@@ -1267,51 +1268,234 @@ static void ieee80211_drv_tx(struct ieee80211_local *local,
}
if (!txq)
- goto tx_normal;
+ return NULL;
- ac = txq->ac;
- txqi = to_txq_info(txq);
- atomic_inc(&sdata->txqs_len[ac]);
- if (atomic_read(&sdata->txqs_len[ac]) >= local->hw.txq_ac_max_pending)
- netif_stop_subqueue(sdata->dev, ac);
+ return to_txq_info(txq);
+}
+
+static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
+{
+ IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
+}
+
+static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi)
+{
+ IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif;
+}
+
+static u32 codel_skb_len_func(const struct sk_buff *skb)
+{
+ return skb->len;
+}
+
+static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
+{
+ const struct ieee80211_tx_info *info;
+
+ info = (const struct ieee80211_tx_info *)skb->cb;
+ return info->control.enqueue_time;
+}
+
+static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
+ void *ctx)
+{
+ struct ieee80211_local *local;
+ struct txq_info *txqi;
+ struct fq *fq;
+ struct fq_flow *flow;
+
+ txqi = ctx;
+ local = vif_to_sdata(txqi->txq.vif)->local;
+ fq = &local->fq;
+
+ if (cvars == &txqi->def_cvars)
+ flow = &txqi->def_flow;
+ else
+ flow = &fq->flows[cvars - local->cvars];
+
+ return fq_flow_dequeue(fq, flow);
+}
+
+static void codel_drop_func(struct sk_buff *skb,
+ void *ctx)
+{
+ struct ieee80211_local *local;
+ struct ieee80211_hw *hw;
+ struct txq_info *txqi;
+
+ txqi = ctx;
+ local = vif_to_sdata(txqi->txq.vif)->local;
+ hw = &local->hw;
+
+ ieee80211_free_txskb(hw, skb);
+}
+
+static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
+ struct fq_tin *tin,
+ struct fq_flow *flow)
+{
+ struct ieee80211_local *local;
+ struct txq_info *txqi;
+ struct codel_vars *cvars;
+ struct codel_params *cparams;
+ struct codel_stats *cstats;
+
+ local = container_of(fq, struct ieee80211_local, fq);
+ txqi = container_of(tin, struct txq_info, tin);
+ cparams = &local->cparams;
+ cstats = &local->cstats;
+
+ if (flow == &txqi->def_flow)
+ cvars = &txqi->def_cvars;
+ else
+ cvars = &local->cvars[flow - fq->flows];
+
+ return codel_dequeue(txqi,
+ &flow->backlog,
+ cparams,
+ cvars,
+ cstats,
+ codel_skb_len_func,
+ codel_skb_time_func,
+ codel_drop_func,
+ codel_dequeue_func);
+}
+
+static void fq_skb_free_func(struct fq *fq,
+ struct fq_tin *tin,
+ struct fq_flow *flow,
+ struct sk_buff *skb)
+{
+ struct ieee80211_local *local;
+
+ local = container_of(fq, struct ieee80211_local, fq);
+ ieee80211_free_txskb(&local->hw, skb);
+}
+
+static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
+ struct fq_tin *tin,
+ int idx,
+ struct sk_buff *skb)
+{
+ struct txq_info *txqi;
+
+ txqi = container_of(tin, struct txq_info, tin);
+ return &txqi->def_flow;
+}
+
+static void ieee80211_txq_enqueue(struct ieee80211_local *local,
+ struct txq_info *txqi,
+ struct sk_buff *skb)
+{
+ struct fq *fq = &local->fq;
+ struct fq_tin *tin = &txqi->tin;
+
+ ieee80211_set_skb_enqueue_time(skb);
+ fq_tin_enqueue(fq, tin, skb,
+ fq_skb_free_func,
+ fq_flow_get_default_func);
+}
+
+void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
+ struct sta_info *sta,
+ struct txq_info *txqi, int tid)
+{
+ fq_tin_init(&txqi->tin);
+ fq_flow_init(&txqi->def_flow);
+ codel_vars_init(&txqi->def_cvars);
+
+ txqi->txq.vif = &sdata->vif;
+
+ if (sta) {
+ txqi->txq.sta = &sta->sta;
+ sta->sta.txq[tid] = &txqi->txq;
+ txqi->txq.tid = tid;
+ txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
+ } else {
+ sdata->vif.txq = &txqi->txq;
+ txqi->txq.tid = 0;
+ txqi->txq.ac = IEEE80211_AC_BE;
+ }
+}
+
+void ieee80211_txq_purge(struct ieee80211_local *local,
+ struct txq_info *txqi)
+{
+ struct fq *fq = &local->fq;
+ struct fq_tin *tin = &txqi->tin;
+
+ fq_tin_reset(fq, tin, fq_skb_free_func);
+}
+
+int ieee80211_txq_setup_flows(struct ieee80211_local *local)
+{
+ struct fq *fq = &local->fq;
+ int ret;
+ int i;
- spin_lock_bh(&txqi->queue.lock);
- txqi->byte_cnt += skb->len;
- __skb_queue_tail(&txqi->queue, skb);
- spin_unlock_bh(&txqi->queue.lock);
+ if (!local->ops->wake_tx_queue)
+ return 0;
- drv_wake_tx_queue(local, txqi);
+ ret = fq_init(fq, 4096);
+ if (ret)
+ return ret;
+
+ codel_params_init(&local->cparams);
+ codel_stats_init(&local->cstats);
+ local->cparams.interval = MS2TIME(100);
+ local->cparams.target = MS2TIME(20);
+ local->cparams.ecn = true;
+
+ local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
+ GFP_KERNEL);
+ if (!local->cvars) {
+ spin_lock_bh(&fq->lock);
+ fq_reset(fq, fq_skb_free_func);
+ spin_unlock_bh(&fq->lock);
+ return -ENOMEM;
+ }
- return;
+ for (i = 0; i < fq->flows_cnt; i++)
+ codel_vars_init(&local->cvars[i]);
-tx_normal:
- drv_tx(local, &control, skb);
+ return 0;
+}
+
+void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
+{
+ struct fq *fq = &local->fq;
+
+ if (!local->ops->wake_tx_queue)
+ return;
+
+ kfree(local->cvars);
+ local->cvars = NULL;
+
+ spin_lock_bh(&fq->lock);
+ fq_reset(fq, fq_skb_free_func);
+ spin_unlock_bh(&fq->lock);
}
struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
struct ieee80211_txq *txq)
{
struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
struct txq_info *txqi = container_of(txq, struct txq_info, txq);
struct ieee80211_hdr *hdr;
struct sk_buff *skb = NULL;
- u8 ac = txq->ac;
+ struct fq *fq = &local->fq;
+ struct fq_tin *tin = &txqi->tin;
- spin_lock_bh(&txqi->queue.lock);
+ spin_lock_bh(&fq->lock);
if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
goto out;
- skb = __skb_dequeue(&txqi->queue);
+ skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
if (!skb)
goto out;
- txqi->byte_cnt -= skb->len;
-
- atomic_dec(&sdata->txqs_len[ac]);
- if (__netif_subqueue_stopped(sdata->dev, ac))
- ieee80211_propagate_queue_wake(local, sdata->vif.hw_queue[ac]);
+ ieee80211_set_skb_vif(skb, txqi);
hdr = (struct ieee80211_hdr *)skb->data;
if (txq->sta && ieee80211_is_data_qos(hdr->frame_control)) {
@@ -1327,7 +1511,7 @@ struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
}
out:
- spin_unlock_bh(&txqi->queue.lock);
+ spin_unlock_bh(&fq->lock);
if (skb && skb_has_frag_list(skb) &&
!ieee80211_hw_check(&local->hw, TX_FRAG_LIST))
@@ -1343,7 +1527,10 @@ static bool ieee80211_tx_frags(struct ieee80211_local *local,
struct sk_buff_head *skbs,
bool txpending)
{
+ struct ieee80211_tx_control control = {};
+ struct fq *fq = &local->fq;
struct sk_buff *skb, *tmp;
+ struct txq_info *txqi;
unsigned long flags;
skb_queue_walk_safe(skbs, skb, tmp) {
@@ -1358,6 +1545,21 @@ static bool ieee80211_tx_frags(struct ieee80211_local *local,
}
#endif
+ txqi = ieee80211_get_txq(local, vif, sta, skb);
+ if (txqi) {
+ info->control.vif = vif;
+
+ __skb_unlink(skb, skbs);
+
+ spin_lock_bh(&fq->lock);
+ ieee80211_txq_enqueue(local, txqi, skb);
+ spin_unlock_bh(&fq->lock);
+
+ drv_wake_tx_queue(local, txqi);
+
+ continue;
+ }
+
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
if (local->queue_stop_reasons[q] ||
(!txpending && !skb_queue_empty(&local->pending[q]))) {
@@ -1400,9 +1602,10 @@ static bool ieee80211_tx_frags(struct ieee80211_local *local,
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
info->control.vif = vif;
+ control.sta = sta;
__skb_unlink(skb, skbs);
- ieee80211_drv_tx(local, vif, sta, skb);
+ drv_tx(local, &control, skb);
}
return true;
@@ -2882,6 +3085,9 @@ static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb)
{
struct ieee80211_local *local = sdata->local;
+ struct fq *fq = &local->fq;
+ struct fq_tin *tin;
+ struct fq_flow *flow;
u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
struct ieee80211_txq *txq = sta->sta.txq[tid];
struct txq_info *txqi;
@@ -2893,6 +3099,7 @@ static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
__be16 len;
void *data;
bool ret = false;
+ unsigned int orig_len;
int n = 1, nfrags;
if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
@@ -2909,12 +3116,20 @@ static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
max_amsdu_len = min_t(int, max_amsdu_len,
sta->sta.max_rc_amsdu_len);
- spin_lock_bh(&txqi->queue.lock);
+ spin_lock_bh(&fq->lock);
+
+ /* TODO: Ideally aggregation should be done on dequeue to remain
+ * responsive to environment changes.
+ */
- head = skb_peek_tail(&txqi->queue);
+ tin = &txqi->tin;
+ flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
+ head = skb_peek_tail(&flow->queue);
if (!head)
goto out;
+ orig_len = head->len;
+
if (skb->len + head->len > max_amsdu_len)
goto out;
@@ -2953,8 +3168,13 @@ static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
head->data_len += skb->len;
*frag_tail = skb;
+ flow->backlog += head->len - orig_len;
+ tin->backlog_bytes += head->len - orig_len;
+
+ fq_recalc_backlog(fq, tin, flow);
+
out:
- spin_unlock_bh(&txqi->queue.lock);
+ spin_unlock_bh(&fq->lock);
return ret;
}