From 86a22acfcb40ed9cf4ceee789b45da6a3314ed77 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Fri, 7 Jun 2013 18:12:01 +0200 Subject: [PATCH] ath9k: implement support for .release_buffered_frames() This adds support for PS-Poll and U-APSD driver-buffered frames (part of an aggregation session). Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/ath9k.h | 5 + drivers/net/wireless/ath/ath9k/main.c | 1 + drivers/net/wireless/ath/ath9k/xmit.c | 175 ++++++++++++++++++++----- 3 files changed, 145 insertions(+), 36 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index 4f798276802c..bd35a54a3f04 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -354,6 +354,11 @@ void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid void ath_tx_aggr_wakeup(struct ath_softc *sc, struct ath_node *an); void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc, struct ath_node *an); +void ath9k_release_buffered_frames(struct ieee80211_hw *hw, + struct ieee80211_sta *sta, + u16 tids, int nframes, + enum ieee80211_frame_release_type reason, + bool more_data); /********/ /* VIFs */ diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index e5b186b04b29..bf61a1c3f14c 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -2347,6 +2347,7 @@ struct ieee80211_ops ath9k_ops = { .flush = ath9k_flush, .tx_frames_pending = ath9k_tx_frames_pending, .tx_last_beacon = ath9k_tx_last_beacon, + .release_buffered_frames = ath9k_release_buffered_frames, .get_stats = ath9k_get_stats, .set_antenna = ath9k_set_antenna, .get_antenna = ath9k_get_antenna, diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index 3931bd82629d..6c9ff9c9730f 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -518,6 +518,10 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, !txfail); } else { + if (tx_info->flags & IEEE80211_TX_STATUS_EOSP) { + tx_info->flags &= ~IEEE80211_TX_STATUS_EOSP; + ieee80211_sta_eosp(sta); + } /* retry the un-acked ones */ if (bf->bf_next == NULL && bf_last->bf_stale) { struct ath_buf *tbf; @@ -786,25 +790,20 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, return ndelim; } -static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, - struct ath_txq *txq, - struct ath_atx_tid *tid, - struct list_head *bf_q, - int *aggr_len) +static struct ath_buf * +ath_tx_get_tid_subframe(struct ath_softc *sc, struct ath_txq *txq, + struct ath_atx_tid *tid) { -#define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) - struct ath_buf *bf, *bf_first = NULL, *bf_prev = NULL; - int rl = 0, nframes = 0, ndelim, prev_al = 0; - u16 aggr_limit = 0, al = 0, bpad = 0, - al_delta, h_baw = tid->baw_size / 2; - enum ATH_AGGR_STATUS status = ATH_AGGR_DONE; - struct ieee80211_tx_info *tx_info; struct ath_frame_info *fi; struct sk_buff *skb; + struct ath_buf *bf; u16 seqno; - do { + while (1) { skb = skb_peek(&tid->buf_q); + if (!skb) + break; + fi = get_frame_info(skb); bf = fi->bf; if (!fi->bf) @@ -820,10 +819,8 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, seqno = bf->bf_state.seqno; /* do not step over block-ack window */ - if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno)) { - status = ATH_AGGR_BAW_CLOSED; + if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno)) break; - } if (tid->bar_index > ATH_BA_INDEX(tid->seq_start, seqno)) { struct ath_tx_status ts = {}; @@ -837,6 +834,40 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, continue; } + bf->bf_next = NULL; + bf->bf_lastbf = bf; + return bf; + } + + return NULL; +} + +static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, + struct ath_txq *txq, + struct ath_atx_tid *tid, + struct list_head *bf_q, + int *aggr_len) +{ +#define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) + struct ath_buf *bf, *bf_first = NULL, *bf_prev = NULL; + int rl = 0, nframes = 0, ndelim, prev_al = 0; + u16 aggr_limit = 0, al = 0, bpad = 0, + al_delta, h_baw = tid->baw_size / 2; + enum ATH_AGGR_STATUS status = ATH_AGGR_DONE; + struct ieee80211_tx_info *tx_info; + struct ath_frame_info *fi; + struct sk_buff *skb; + + do { + bf = ath_tx_get_tid_subframe(sc, txq, tid); + if (!bf) { + status = ATH_AGGR_BAW_CLOSED; + break; + } + + skb = bf->bf_mpdu; + fi = get_frame_info(skb); + if (!bf_first) bf_first = bf; @@ -882,7 +913,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, /* link buffers of this frame to the aggregate */ if (!fi->retries) - ath_tx_addto_baw(sc, tid, seqno); + ath_tx_addto_baw(sc, tid, bf->bf_state.seqno); bf->bf_state.ndelim = ndelim; __skb_unlink(skb, &tid->buf_q); @@ -1090,10 +1121,8 @@ static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, struct ath_txq *txq, int len) { struct ath_hw *ah = sc->sc_ah; - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(bf->bf_mpdu); - struct ath_buf *bf_first = bf; + struct ath_buf *bf_first = NULL; struct ath_tx_info info; - bool aggr = !!(bf->bf_state.bf_type & BUF_AGGR); memset(&info, 0, sizeof(info)); info.is_first = true; @@ -1101,24 +1130,11 @@ static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, info.txpower = MAX_RATE_POWER; info.qcu = txq->axq_qnum; - info.flags = ATH9K_TXDESC_INTREQ; - if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) - info.flags |= ATH9K_TXDESC_NOACK; - if (tx_info->flags & IEEE80211_TX_CTL_LDPC) - info.flags |= ATH9K_TXDESC_LDPC; - - ath_buf_set_rate(sc, bf, &info, len); - - if (tx_info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) - info.flags |= ATH9K_TXDESC_CLRDMASK; - - if (bf->bf_state.bfs_paprd) - info.flags |= (u32) bf->bf_state.bfs_paprd << ATH9K_TXDESC_PAPRD_S; - - while (bf) { struct sk_buff *skb = bf->bf_mpdu; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); struct ath_frame_info *fi = get_frame_info(skb); + bool aggr = !!(bf->bf_state.bf_type & BUF_AGGR); info.type = get_hw_packet_type(skb); if (bf->bf_next) @@ -1126,6 +1142,26 @@ static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, else info.link = 0; + if (!bf_first) { + bf_first = bf; + + info.flags = ATH9K_TXDESC_INTREQ; + if ((tx_info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) || + txq == sc->tx.uapsdq) + info.flags |= ATH9K_TXDESC_CLRDMASK; + + if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) + info.flags |= ATH9K_TXDESC_NOACK; + if (tx_info->flags & IEEE80211_TX_CTL_LDPC) + info.flags |= ATH9K_TXDESC_LDPC; + + if (bf->bf_state.bfs_paprd) + info.flags |= (u32) bf->bf_state.bfs_paprd << + ATH9K_TXDESC_PAPRD_S; + + ath_buf_set_rate(sc, bf, &info, len); + } + info.buf_addr[0] = bf->bf_buf_addr; info.buf_len[0] = skb->len; info.pkt_len = fi->framelen; @@ -1135,7 +1171,7 @@ static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, if (aggr) { if (bf == bf_first) info.aggr = AGGR_BUF_FIRST; - else if (!bf->bf_next) + else if (bf == bf_first->bf_lastbf) info.aggr = AGGR_BUF_LAST; else info.aggr = AGGR_BUF_MIDDLE; @@ -1144,6 +1180,9 @@ static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, info.aggr_len = len; } + if (bf == bf_first->bf_lastbf) + bf_first = NULL; + ath9k_hw_set_txdesc(ah, bf->bf_desc, &info); bf = bf->bf_next; } @@ -1328,6 +1367,70 @@ void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, ath_txq_unlock_complete(sc, txq); } +void ath9k_release_buffered_frames(struct ieee80211_hw *hw, + struct ieee80211_sta *sta, + u16 tids, int nframes, + enum ieee80211_frame_release_type reason, + bool more_data) +{ + struct ath_softc *sc = hw->priv; + struct ath_node *an = (struct ath_node *)sta->drv_priv; + struct ath_txq *txq = sc->tx.uapsdq; + struct ieee80211_tx_info *info; + struct list_head bf_q; + struct ath_buf *bf_tail = NULL, *bf; + int sent = 0; + int i; + + INIT_LIST_HEAD(&bf_q); + for (i = 0; tids && nframes; i++, tids >>= 1) { + struct ath_atx_tid *tid; + + if (!(tids & 1)) + continue; + + tid = ATH_AN_2_TID(an, i); + if (tid->paused) + continue; + + ath_txq_lock(sc, tid->ac->txq); + while (!skb_queue_empty(&tid->buf_q) && nframes > 0) { + bf = ath_tx_get_tid_subframe(sc, sc->tx.uapsdq, tid); + if (!bf) + break; + + __skb_unlink(bf->bf_mpdu, &tid->buf_q); + list_add_tail(&bf->list, &bf_q); + ath_set_rates(tid->an->vif, tid->an->sta, bf); + ath_tx_addto_baw(sc, tid, bf->bf_state.seqno); + bf->bf_state.bf_type &= ~BUF_AGGR; + if (bf_tail) + bf_tail->bf_next = bf; + + bf_tail = bf; + nframes--; + sent++; + TX_STAT_INC(txq->axq_qnum, a_queued_hw); + + if (skb_queue_empty(&tid->buf_q)) + ieee80211_sta_set_buffered(an->sta, i, false); + } + ath_txq_unlock_complete(sc, tid->ac->txq); + } + + if (list_empty(&bf_q)) + return; + + info = IEEE80211_SKB_CB(bf_tail->bf_mpdu); + info->flags |= IEEE80211_TX_STATUS_EOSP; + + bf = list_first_entry(&bf_q, struct ath_buf, list); + ath_txq_lock(sc, txq); + ath_tx_fill_desc(sc, bf, txq, 0); + ath_tx_txqaddbuf(sc, txq, &bf_q, false); + ath_txq_unlock(sc, txq); +} + /********************/ /* Queue Management */ /********************/ -- 2.39.5