diff options
author | Felix Fietkau <nbd@nbd.name> | 2018-10-25 16:11:34 +0200 |
---|---|---|
committer | Felix Fietkau <nbd@nbd.name> | 2018-11-30 12:21:42 +0100 |
commit | 88046b2c9f6d8b91cc8b3ada547f49f6dd45469b (patch) | |
tree | 9d9cb060a3b528b42fc4fa1e0b5700ba2e4513da /drivers | |
parent | 59b55d066ff625f8613c563bd2ed705bce412fa8 (diff) | |
download | linux-88046b2c9f6d8b91cc8b3ada547f49f6dd45469b.tar.bz2 |
mt76: add support for reporting tx status with skb
MT76x2/MT76x0 has somewhat unreliable tx status reporting, and for that
reason the driver currently does not report per-skb tx ack status at all.
This breaks things like client idle polling, which relies on the tx ack
status of a transmitted nullfunc frame.
This patch adds code to report skb-attached tx status if requested by
mac80211 or the rate control module. Since tx status is polled from a
simple FIFO register, the code needs to account for the possibility of
tx status events getting lost.
The code keeps a list of skbs for which tx status is required and passes
them to mac80211 once tx status has been filled in and the DMA queue is
done with it.
If a tx status event is not received after one second, the status rates
are cleared, and a succesful ACK is indicated to avoid spurious disassoc
during assoc or client polling.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/dma.c | 1 | ||||
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/mac80211.c | 3 | ||||
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76.h | 48 | ||||
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x02.h | 1 | ||||
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x02_mac.c | 74 | ||||
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x02_mac.h | 19 | ||||
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x02_txrx.c | 25 | ||||
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x02_usb_core.c | 42 | ||||
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x02_util.c | 1 | ||||
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/tx.c | 111 | ||||
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/usb.c | 1 |
11 files changed, 231 insertions, 95 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c index f7fbd7016403..2d7bd26875c6 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -258,6 +258,7 @@ int mt76_dma_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q, return -ENOMEM; } + skb->prev = skb->next = NULL; dma_sync_single_for_cpu(dev->dev, t->dma_addr, sizeof(t->txwi), DMA_TO_DEVICE); ret = dev->drv->tx_prepare_skb(dev, &t->txwi, skb, q, wcid, sta, diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c index 2a699e8b79bf..85e05a825b5d 100644 --- a/drivers/net/wireless/mediatek/mt76/mac80211.c +++ b/drivers/net/wireless/mediatek/mt76/mac80211.c @@ -285,6 +285,7 @@ mt76_alloc_device(unsigned int size, const struct ieee80211_ops *ops) spin_lock_init(&dev->cc_lock); mutex_init(&dev->mutex); init_waitqueue_head(&dev->tx_wait); + skb_queue_head_init(&dev->status_list); return dev; } @@ -326,6 +327,7 @@ int mt76_register_device(struct mt76_dev *dev, bool vht, ieee80211_hw_set(hw, TX_FRAG_LIST); ieee80211_hw_set(hw, MFP_CAPABLE); ieee80211_hw_set(hw, AP_LINK_PS); + ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); wiphy->flags |= WIPHY_FLAG_IBSS_RSN; @@ -357,6 +359,7 @@ void mt76_unregister_device(struct mt76_dev *dev) { struct ieee80211_hw *hw = dev->hw; + mt76_tx_status_flush(dev, NULL); ieee80211_unregister_hw(hw); mt76_tx_free(dev); } diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h index 53ddc4fa5884..94ab00b549af 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76.h +++ b/drivers/net/wireless/mediatek/mt76/mt76.h @@ -195,6 +195,8 @@ struct mt76_wcid { u8 tx_rate_nss; s8 max_txpwr_adj; bool sw_iv; + + u8 packet_id; }; struct mt76_txq { @@ -233,6 +235,22 @@ struct mt76_rx_tid { struct sk_buff *reorder_buf[]; }; +#define MT_TX_CB_DMA_DONE BIT(0) +#define MT_TX_CB_TXS_DONE BIT(1) +#define MT_TX_CB_TXS_FAILED BIT(2) + +#define MT_PACKET_ID_MASK GENMASK(7, 0) +#define MT_PACKET_ID_NO_ACK MT_PACKET_ID_MASK + +#define MT_TX_STATUS_SKB_TIMEOUT HZ + +struct mt76_tx_cb { + unsigned long jiffies; + u8 wcid; + u8 pktid; + u8 flags; +}; + enum { MT76_STATE_INITIALIZED, MT76_STATE_RUNNING, @@ -400,6 +418,7 @@ struct mt76_dev { const struct mt76_queue_ops *queue_ops; wait_queue_head_t tx_wait; + struct sk_buff_head status_list; unsigned long wcid_mask[MT76_N_WCIDS / BITS_PER_LONG]; @@ -594,6 +613,13 @@ wcid_to_sta(struct mt76_wcid *wcid) return container_of(ptr, struct ieee80211_sta, drv_priv); } +static inline struct mt76_tx_cb *mt76_tx_skb_cb(struct sk_buff *skb) +{ + BUILD_BUG_ON(sizeof(struct mt76_tx_cb) > + sizeof(IEEE80211_SKB_CB(skb)->status.status_driver_data)); + return ((void *) IEEE80211_SKB_CB(skb)->status.status_driver_data); +} + int mt76_dma_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q, struct sk_buff *skb, struct mt76_wcid *wcid, struct ieee80211_sta *sta); @@ -624,6 +650,28 @@ void mt76_rx_aggr_stop(struct mt76_dev *dev, struct mt76_wcid *wcid, u8 tid); void mt76_wcid_key_setup(struct mt76_dev *dev, struct mt76_wcid *wcid, struct ieee80211_key_conf *key); +int mt76_tx_status_skb_add(struct mt76_dev *dev, struct mt76_wcid *wcid, + struct sk_buff *skb); +struct sk_buff *mt76_tx_status_skb_get(struct mt76_dev *dev, + struct mt76_wcid *wcid, int pktid); +void mt76_tx_status_skb_done(struct mt76_dev *dev, struct sk_buff *skb); +void mt76_tx_complete_skb(struct mt76_dev *dev, struct sk_buff *skb); + +static inline void +mt76_tx_status_check(struct mt76_dev *dev) +{ + spin_lock_bh(&dev->status_list.lock); + mt76_tx_status_skb_get(dev, NULL, 0); + spin_unlock_bh(&dev->status_list.lock); +} + +static inline void +mt76_tx_status_flush(struct mt76_dev *dev, struct mt76_wcid *wcid) +{ + spin_lock_bh(&dev->status_list.lock); + mt76_tx_status_skb_get(dev, wcid, -1); + spin_unlock_bh(&dev->status_list.lock); +} struct ieee80211_sta *mt76_rx_convert(struct sk_buff *skb); diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02.h b/drivers/net/wireless/mediatek/mt76/mt76x02.h index d599b7dddac7..19489a72fc2b 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x02.h +++ b/drivers/net/wireless/mediatek/mt76/mt76x02.h @@ -139,7 +139,6 @@ void mt76x02_set_coverage_class(struct ieee80211_hw *hw, int mt76x02_set_rts_threshold(struct ieee80211_hw *hw, u32 val); int mt76x02_insert_hdr_pad(struct sk_buff *skb); void mt76x02_remove_hdr_pad(struct sk_buff *skb, int len); -void mt76x02_tx_complete(struct mt76_dev *dev, struct sk_buff *skb); bool mt76x02_tx_status_data(struct mt76_dev *mdev, u8 *update); void mt76x02_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q, struct sk_buff *skb); diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c index ad8df680c6a5..90d24af7f6c8 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c @@ -324,8 +324,6 @@ void mt76x02_mac_write_txwi(struct mt76x02_dev *dev, struct mt76x02_txwi *txwi, else txwi->wcid = 0xff; - txwi->pktid = 1; - if (wcid && wcid->sw_iv && key) { u64 pn = atomic64_inc_return(&key->tx_pn); ccmp_pn[0] = pn; @@ -371,8 +369,6 @@ void mt76x02_mac_write_txwi(struct mt76x02_dev *dev, struct mt76x02_txwi *txwi, txwi->ack_ctl |= MT_TXWI_ACK_CTL_REQ; if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) txwi->ack_ctl |= MT_TXWI_ACK_CTL_NSEQ; - if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) - txwi->pktid |= MT_TXWI_PKTID_PROBE; if ((info->flags & IEEE80211_TX_CTL_AMPDU) && sta) { u8 ba_size = IEEE80211_MIN_AMPDU_BUF; @@ -425,9 +421,6 @@ mt76x02_mac_fill_tx_status(struct mt76x02_dev *dev, info->status.ampdu_len = n_frames; info->status.ampdu_ack_len = st->success ? n_frames : 0; - if (st->pktid & MT_TXWI_PKTID_PROBE) - info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE; - if (st->aggr) info->flags |= IEEE80211_TX_CTL_AMPDU | IEEE80211_TX_STAT_AMPDU; @@ -442,11 +435,19 @@ void mt76x02_send_tx_status(struct mt76x02_dev *dev, struct mt76x02_tx_status *stat, u8 *update) { struct ieee80211_tx_info info = {}; - struct ieee80211_sta *sta = NULL; + struct ieee80211_tx_status status = { + .info = &info + }; struct mt76_wcid *wcid = NULL; struct mt76x02_sta *msta = NULL; + struct mt76_dev *mdev = &dev->mt76; + + if (stat->pktid == MT_PACKET_ID_NO_ACK) + return; rcu_read_lock(); + spin_lock_bh(&mdev->status_list.lock); + if (stat->wcid < ARRAY_SIZE(dev->mt76.wcid)) wcid = rcu_dereference(dev->mt76.wcid[stat->wcid]); @@ -454,11 +455,19 @@ void mt76x02_send_tx_status(struct mt76x02_dev *dev, void *priv; priv = msta = container_of(wcid, struct mt76x02_sta, wcid); - sta = container_of(priv, struct ieee80211_sta, - drv_priv); + status.sta = container_of(priv, struct ieee80211_sta, + drv_priv); + } + + if (wcid) { + if (stat->pktid) + status.skb = mt76_tx_status_skb_get(mdev, wcid, + stat->pktid); + if (status.skb) + status.info = IEEE80211_SKB_CB(status.skb); } - if (msta && stat->aggr) { + if (msta && stat->aggr && !status.skb) { u32 stat_val, stat_cache; stat_val = stat->rate; @@ -472,20 +481,24 @@ void mt76x02_send_tx_status(struct mt76x02_dev *dev, goto out; } - mt76x02_mac_fill_tx_status(dev, &info, &msta->status, + mt76x02_mac_fill_tx_status(dev, status.info, &msta->status, msta->n_frames); msta->status = *stat; msta->n_frames = 1; *update = 0; } else { - mt76x02_mac_fill_tx_status(dev, &info, stat, 1); + mt76x02_mac_fill_tx_status(dev, status.info, stat, 1); *update = 1; } - ieee80211_tx_status_noskb(dev->mt76.hw, sta, &info); + if (status.skb) + mt76_tx_status_skb_done(mdev, status.skb); + else + ieee80211_tx_status_ext(mt76_hw(dev), &status); out: + spin_unlock_bh(&mdev->status_list.lock); rcu_read_unlock(); } @@ -707,32 +720,23 @@ void mt76x02_mac_poll_tx_status(struct mt76x02_dev *dev, bool irq) } } -static void -mt76x02_mac_queue_txdone(struct mt76x02_dev *dev, struct sk_buff *skb, - void *txwi_ptr) -{ - struct mt76x02_tx_info *txi = mt76x02_skb_tx_info(skb); - struct mt76x02_txwi *txwi = txwi_ptr; - - mt76x02_mac_poll_tx_status(dev, false); - - txi->tries = 0; - txi->jiffies = jiffies; - txi->wcid = txwi->wcid; - txi->pktid = txwi->pktid; - trace_mac_txdone_add(dev, txwi->wcid, txwi->pktid); - mt76x02_tx_complete(&dev->mt76, skb); -} - void mt76x02_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue *q, struct mt76_queue_entry *e, bool flush) { struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76); + struct mt76x02_txwi *txwi; - if (e->txwi) - mt76x02_mac_queue_txdone(dev, e->skb, &e->txwi->txwi); - else + if (!e->txwi) { dev_kfree_skb_any(e->skb); + return; + } + + mt76x02_mac_poll_tx_status(dev, false); + + txwi = (struct mt76x02_txwi *) &e->txwi->txwi; + trace_mac_txdone_add(dev, txwi->wcid, txwi->pktid); + + mt76_tx_complete_skb(mdev, e->skb); } EXPORT_SYMBOL_GPL(mt76x02_tx_complete_skb); @@ -817,6 +821,8 @@ void mt76x02_mac_work(struct work_struct *work) if (!dev->beacon_mask) mt76x02_check_mac_err(dev); + mt76_tx_status_check(&dev->mt76); + ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mac_work, MT_CALIBRATE_INTERVAL); } diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.h b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.h index e2c47ca18d85..b076c4305585 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.h +++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.h @@ -42,15 +42,6 @@ struct mt76x02_vif { struct mt76_wcid group_wcid; }; -struct mt76x02_tx_info { - unsigned long jiffies; - u8 tries; - - u8 wcid; - u8 pktid; - u8 retry; -}; - DECLARE_EWMA(signal, 10, 8); struct mt76x02_sta { @@ -153,8 +144,6 @@ enum mt76x2_phy_bandwidth { #define MT_TXWI_ACK_CTL_NSEQ BIT(1) #define MT_TXWI_ACK_CTL_BA_WINDOW GENMASK(7, 2) -#define MT_TXWI_PKTID_PROBE BIT(7) - struct mt76x02_txwi { __le16 flags; __le16 rate; @@ -190,14 +179,6 @@ static inline bool mt76x02_wait_for_mac(struct mt76_dev *dev) return false; } -static inline struct mt76x02_tx_info * -mt76x02_skb_tx_info(struct sk_buff *skb) -{ - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - - return (void *)info->status.status_driver_data; -} - void mt76x02_txq_init(struct mt76x02_dev *dev, struct ieee80211_txq *txq); void mt76x02_mac_set_short_preamble(struct mt76x02_dev *dev, bool enable); diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_txrx.c b/drivers/net/wireless/mediatek/mt76/mt76x02_txrx.c index c008e08602f3..4598cb2cc3ff 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x02_txrx.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x02_txrx.c @@ -140,21 +140,6 @@ void mt76x02_tx_set_txpwr_auto(struct mt76x02_dev *dev, s8 txpwr) } EXPORT_SYMBOL_GPL(mt76x02_tx_set_txpwr_auto); -void mt76x02_tx_complete(struct mt76_dev *dev, struct sk_buff *skb) -{ - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - - if (info->flags & IEEE80211_TX_CTL_AMPDU) { - ieee80211_free_txskb(dev->hw, skb); - } else { - ieee80211_tx_info_clear_status(info); - info->status.rates[0].idx = -1; - info->flags |= IEEE80211_TX_STAT_ACK; - ieee80211_tx_status(dev->hw, skb); - } -} -EXPORT_SYMBOL_GPL(mt76x02_tx_complete); - bool mt76x02_tx_status_data(struct mt76_dev *mdev, u8 *update) { struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76); @@ -169,14 +154,15 @@ bool mt76x02_tx_status_data(struct mt76_dev *mdev, u8 *update) } EXPORT_SYMBOL_GPL(mt76x02_tx_status_data); -int mt76x02_tx_prepare_skb(struct mt76_dev *mdev, void *txwi, +int mt76x02_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr, struct sk_buff *skb, struct mt76_queue *q, struct mt76_wcid *wcid, struct ieee80211_sta *sta, u32 *tx_info) { struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76); - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct mt76x02_txwi *txwi = txwi_ptr; int qsel = MT_QSEL_EDCA; + int pid; int ret; if (q == &dev->mt76.q_tx[MT_TXQ_PSD] && wcid && wcid->idx < 128) @@ -184,11 +170,14 @@ int mt76x02_tx_prepare_skb(struct mt76_dev *mdev, void *txwi, mt76x02_mac_write_txwi(dev, txwi, skb, wcid, sta, skb->len); + pid = mt76_tx_status_skb_add(mdev, wcid, skb); + txwi->pktid = pid; + ret = mt76x02_insert_hdr_pad(skb); if (ret < 0) return ret; - if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) + if (pid && pid != MT_PACKET_ID_NO_ACK) qsel = MT_QSEL_MGMT; *tx_info = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) | diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_usb_core.c b/drivers/net/wireless/mediatek/mt76/mt76x02_usb_core.c index dc2226c722dd..81970cf777c0 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x02_usb_core.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x02_usb_core.c @@ -30,7 +30,7 @@ void mt76x02u_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue *q, struct mt76_queue_entry *e, bool flush) { mt76x02u_remove_dma_hdr(e->skb); - mt76x02_tx_complete(mdev, e->skb); + mt76_tx_complete_skb(mdev, e->skb); } EXPORT_SYMBOL_GPL(mt76x02u_tx_complete_skb); @@ -67,27 +67,6 @@ int mt76x02u_skb_dma_info(struct sk_buff *skb, int port, u32 flags) return 0; } -static int -mt76x02u_set_txinfo(struct sk_buff *skb, struct mt76_wcid *wcid, u8 ep) -{ - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - enum mt76_qsel qsel; - u32 flags; - - if ((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) || - ep == MT_EP_OUT_HCCA) - qsel = MT_QSEL_MGMT; - else - qsel = MT_QSEL_EDCA; - - flags = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) | - MT_TXD_INFO_80211; - if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv) - flags |= MT_TXD_INFO_WIV; - - return mt76x02u_skb_dma_info(skb, WLAN_PORT, flags); -} - int mt76x02u_tx_prepare_skb(struct mt76_dev *mdev, void *data, struct sk_buff *skb, struct mt76_queue *q, struct mt76_wcid *wcid, struct ieee80211_sta *sta, @@ -95,13 +74,30 @@ int mt76x02u_tx_prepare_skb(struct mt76_dev *mdev, void *data, { struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76); struct mt76x02_txwi *txwi; + enum mt76_qsel qsel; int len = skb->len; + u32 flags; + int pid; mt76x02_insert_hdr_pad(skb); txwi = skb_push(skb, sizeof(struct mt76x02_txwi)); mt76x02_mac_write_txwi(dev, txwi, skb, wcid, sta, len); - return mt76x02u_set_txinfo(skb, wcid, q2ep(q->hw_idx)); + pid = mt76_tx_status_skb_add(mdev, wcid, skb); + txwi->pktid = pid; + + if ((pid && pid != MT_PACKET_ID_NO_ACK) || + q2ep(q->hw_idx) == MT_EP_OUT_HCCA) + qsel = MT_QSEL_MGMT; + else + qsel = MT_QSEL_EDCA; + + flags = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) | + MT_TXD_INFO_80211; + if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv) + flags |= MT_TXD_INFO_WIV; + + return mt76x02u_skb_dma_info(skb, WLAN_PORT, flags); } EXPORT_SYMBOL_GPL(mt76x02u_tx_prepare_skb); diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c index c0f923942edc..adfc46419b6b 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c @@ -215,6 +215,7 @@ int mt76x02_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, int i; mutex_lock(&dev->mt76.mutex); + mt76_tx_status_flush(&dev->mt76, &msta->wcid); rcu_assign_pointer(dev->mt76.wcid[idx], NULL); for (i = 0; i < ARRAY_SIZE(sta->txq); i++) mt76_txq_remove(&dev->mt76, sta->txq[i]); diff --git a/drivers/net/wireless/mediatek/mt76/tx.c b/drivers/net/wireless/mediatek/mt76/tx.c index 7cbce03aa65b..e6cd583aafd3 100644 --- a/drivers/net/wireless/mediatek/mt76/tx.c +++ b/drivers/net/wireless/mediatek/mt76/tx.c @@ -103,6 +103,117 @@ mt76_check_agg_ssn(struct mt76_txq *mtxq, struct sk_buff *skb) mtxq->agg_ssn = le16_to_cpu(hdr->seq_ctrl) + 0x10; } +static void +__mt76_tx_status_skb_done(struct mt76_dev *dev, struct sk_buff *skb, u8 flags) +{ + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb); + u8 done = MT_TX_CB_DMA_DONE | MT_TX_CB_TXS_DONE; + + flags |= cb->flags; + cb->flags = flags; + + if ((flags & done) != done) + return; + + __skb_unlink(skb, &dev->status_list); + + /* Tx status can be unreliable. if it fails, mark the frame as ACKed */ + if (flags & MT_TX_CB_TXS_FAILED) { + ieee80211_tx_info_clear_status(info); + info->status.rates[0].idx = -1; + info->flags |= IEEE80211_TX_STAT_ACK; + } + + ieee80211_tx_status(dev->hw, skb); +} + +void +mt76_tx_status_skb_done(struct mt76_dev *dev, struct sk_buff *skb) +{ + __mt76_tx_status_skb_done(dev, skb, MT_TX_CB_TXS_DONE); +} +EXPORT_SYMBOL_GPL(mt76_tx_status_skb_done); + +int +mt76_tx_status_skb_add(struct mt76_dev *dev, struct mt76_wcid *wcid, + struct sk_buff *skb) +{ + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb); + int pid; + + if (!wcid) + return 0; + + if (info->flags & IEEE80211_TX_CTL_NO_ACK) + return MT_PACKET_ID_NO_ACK; + + if (!(info->flags & (IEEE80211_TX_CTL_REQ_TX_STATUS | + IEEE80211_TX_CTL_RATE_CTRL_PROBE))) + return 0; + + spin_lock_bh(&dev->status_list.lock); + + memset(cb, 0, sizeof(*cb)); + wcid->packet_id = (wcid->packet_id + 1) & MT_PACKET_ID_MASK; + if (!wcid->packet_id || wcid->packet_id == MT_PACKET_ID_NO_ACK) + wcid->packet_id = 1; + + pid = wcid->packet_id; + cb->wcid = wcid->idx; + cb->pktid = pid; + cb->jiffies = jiffies; + + __skb_queue_tail(&dev->status_list, skb); + spin_unlock_bh(&dev->status_list.lock); + + return pid; +} +EXPORT_SYMBOL_GPL(mt76_tx_status_skb_add); + +struct sk_buff * +mt76_tx_status_skb_get(struct mt76_dev *dev, struct mt76_wcid *wcid, int pktid) +{ + struct sk_buff *skb, *tmp; + + if (pktid == MT_PACKET_ID_NO_ACK) + return NULL; + + skb_queue_walk_safe(&dev->status_list, skb, tmp) { + struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb); + + if (wcid && cb->wcid != wcid->idx) + continue; + + if (cb->pktid == pktid) + return skb; + + if (!pktid && + !time_after(jiffies, cb->jiffies + MT_TX_STATUS_SKB_TIMEOUT)) + continue; + + __mt76_tx_status_skb_done(dev, skb, MT_TX_CB_TXS_FAILED | + MT_TX_CB_TXS_DONE); + } + + return NULL; +} +EXPORT_SYMBOL_GPL(mt76_tx_status_skb_get); + +void mt76_tx_complete_skb(struct mt76_dev *dev, struct sk_buff *skb) +{ + if (!skb->prev) { + ieee80211_free_txskb(dev->hw, skb); + return; + } + + spin_lock_bh(&dev->status_list.lock); + __mt76_tx_status_skb_done(dev, skb, MT_TX_CB_DMA_DONE); + spin_unlock_bh(&dev->status_list.lock); +} +EXPORT_SYMBOL_GPL(mt76_tx_complete_skb); + void mt76_tx(struct mt76_dev *dev, struct ieee80211_sta *sta, struct mt76_wcid *wcid, struct sk_buff *skb) diff --git a/drivers/net/wireless/mediatek/mt76/usb.c b/drivers/net/wireless/mediatek/mt76/usb.c index 24d41288ea59..b061263453d4 100644 --- a/drivers/net/wireless/mediatek/mt76/usb.c +++ b/drivers/net/wireless/mediatek/mt76/usb.c @@ -700,6 +700,7 @@ mt76u_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q, if (q->queued == q->ndesc) return -ENOSPC; + skb->prev = skb->next = NULL; err = dev->drv->tx_prepare_skb(dev, NULL, skb, q, wcid, sta, NULL); if (err < 0) return err; |