From 04caf863750bc7e042d1e8d57e5ce9d6326ab435 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sun, 14 Nov 2010 15:20:12 +0100 Subject: [PATCH] ath9k: more tx setup cleanups - remove the BUF_HT flag, and instead check for IEEE80211_TX_CTL_AMPDU before calling ath_tx_send_ampdu. - remove a few unused variables - calculate frame length before adding the frame padding - merge the misnamed ath_tx_start_dma function into ath_tx_start - remove an unused argument for assign_aggr_tid_seqno Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/ath9k.h | 4 +- drivers/net/wireless/ath/ath9k/xmit.c | 129 +++++++++++++++------------------ 2 files changed, 59 insertions(+), 74 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index 7111007..d12123a 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -86,7 +86,6 @@ struct ath_config { /** * enum buffer_type - Buffer type flags * - * @BUF_HT: Send this buffer using HT capabilities * @BUF_AMPDU: This buffer is an ampdu, as part of an aggregate (during TX) * @BUF_AGGR: Indicates whether the buffer can be aggregated * (used in aggregation scheduling) @@ -94,7 +93,6 @@ struct ath_config { * @BUF_XRETRY: To denote excessive retries of the buffer */ enum buffer_type { - BUF_HT = BIT(1), BUF_AMPDU = BIT(2), BUF_AGGR = BIT(3), BUF_RETRY = BIT(4), @@ -102,7 +100,6 @@ enum buffer_type { }; #define bf_retries bf_state.bfs_retries -#define bf_isht(bf) (bf->bf_state.bf_type & BUF_HT) #define bf_isampdu(bf) (bf->bf_state.bf_type & BUF_AMPDU) #define bf_isaggr(bf) (bf->bf_state.bf_type & BUF_AGGR) #define bf_isretried(bf) (bf->bf_state.bf_type & BUF_RETRY) @@ -265,6 +262,7 @@ struct ath_tx_control { struct ath_txq *txq; int if_id; enum ath9k_internal_frame_type frame_type; + int frmlen; u8 paprd; }; diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index f3f0d1c..5eeffae 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -1344,13 +1344,11 @@ static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, } static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid, - struct list_head *bf_head, - struct ath_tx_control *txctl, int frmlen) + struct ath_buf *bf, struct ath_tx_control *txctl) { - struct ath_buf *bf; + struct list_head bf_head; u16 bf_seqno; - bf = list_first_entry(bf_head, struct ath_buf, list); bf->bf_state.bf_type |= BUF_AMPDU; TX_STAT_INC(txctl->txq->axq_qnum, a_queued); bf_seqno = ath_frame_seqno(bf->bf_mpdu); @@ -1369,19 +1367,22 @@ static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid, * Add this frame to software queue for scheduling later * for aggregation. */ - list_move_tail(&bf->list, &tid->buf_q); + list_add_tail(&bf->list, &tid->buf_q); ath_tx_queue_tid(txctl->txq, tid); return; } + INIT_LIST_HEAD(&bf_head); + list_add(&bf->list, &bf_head); + /* Add sub-frame to BAW */ if (!bf_isretried(bf)) ath_tx_addto_baw(sc, tid, bf_seqno); /* Queue to h/w without aggregation */ bf->bf_lastbf = bf; - ath_buf_set_rate(sc, bf, frmlen); - ath_tx_txqaddbuf(sc, txctl->txq, bf_head); + ath_buf_set_rate(sc, bf, txctl->frmlen); + ath_tx_txqaddbuf(sc, txctl->txq, &bf_head); } static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, @@ -1426,8 +1427,7 @@ static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb) return htype; } -static void assign_aggr_tid_seqno(struct sk_buff *skb, - struct ath_buf *bf) +static void assign_aggr_tid_seqno(struct sk_buff *skb) { struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); struct ieee80211_hdr *hdr; @@ -1608,15 +1608,20 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len) } static struct ath_buf *ath_tx_setup_buffer(struct ieee80211_hw *hw, - struct sk_buff *skb) + struct ath_txq *txq, + struct sk_buff *skb, int frmlen) { struct ath_wiphy *aphy = hw->priv; struct ath_softc *sc = aphy->sc; + struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(sc->sc_ah); - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb; struct ath_buf *bf; - int hdrlen; - __le16 fc; + struct ath_desc *ds; + enum ath9k_key_type keytype; + u32 keyix; + int frm_type; bf = ath_tx_get_buffer(sc); if (!bf) { @@ -1624,21 +1629,14 @@ static struct ath_buf *ath_tx_setup_buffer(struct ieee80211_hw *hw, return NULL; } - hdrlen = ieee80211_get_hdrlen_from_skb(skb); - fc = hdr->frame_control; - ATH_TXBUF_RESET(bf); - bf->aphy = aphy; - - if (ieee80211_is_data_qos(fc) && conf_is_ht(&hw->conf)) { - bf->bf_state.bf_type |= BUF_HT; - if (sc->sc_flags & SC_OP_TXAGGR) - assign_aggr_tid_seqno(skb, bf); - } + if (ieee80211_is_data_qos(hdr->frame_control) && + conf_is_ht(&hw->conf) && (sc->sc_flags & SC_OP_TXAGGR)) + assign_aggr_tid_seqno(skb); + bf->aphy = aphy; bf->bf_flags = setup_tx_flags(skb); - bf->bf_mpdu = skb; bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, @@ -1652,33 +1650,7 @@ static struct ath_buf *ath_tx_setup_buffer(struct ieee80211_hw *hw, return NULL; } - return bf; -} - -/* FIXME: tx power */ -static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, - struct ath_tx_control *txctl) -{ - struct sk_buff *skb = bf->bf_mpdu; - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; - struct ath_node *an = NULL; - struct list_head bf_head; - struct ath_desc *ds; - struct ath_atx_tid *tid; - struct ath_hw *ah = sc->sc_ah; - enum ath9k_key_type keytype; - u32 keyix; - int frm_type; - __le16 fc; - u8 tidno; - int frmlen; - frm_type = get_hw_packet_type(skb); - fc = hdr->frame_control; - - INIT_LIST_HEAD(&bf_head); - list_add_tail(&bf->list, &bf_head); ds = bf->bf_desc; ath9k_hw_set_desc_link(ah, ds, 0); @@ -1689,7 +1661,6 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, else keyix = ATH9K_TXKEYIX_INVALID; - frmlen = ath_frame_len(bf->bf_mpdu); ath9k_hw_set11n_txdesc(ah, ds, frmlen, frm_type, MAX_RATE_POWER, keyix, keytype, bf->bf_flags); @@ -1699,40 +1670,50 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, true, /* last segment */ ds, /* first descriptor */ bf->bf_buf_addr, - txctl->txq->axq_qnum); + txq->axq_qnum); + + + return bf; +} + +/* FIXME: tx power */ +static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, + struct ath_tx_control *txctl) +{ + struct sk_buff *skb = bf->bf_mpdu; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + struct ath_node *an = NULL; + struct list_head bf_head; + struct ath_atx_tid *tid; + u8 tidno; spin_lock_bh(&txctl->txq->axq_lock); - if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR) && - tx_info->control.sta) { + if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && tx_info->control.sta) { an = (struct ath_node *)tx_info->control.sta->drv_priv; tidno = ieee80211_get_qos_ctl(hdr)[0] & IEEE80211_QOS_CTL_TID_MASK; tid = ATH_AN_2_TID(an, tidno); - WARN_ON(tid->ac->txq != txctl->txq); - if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { - /* - * Try aggregation if it's a unicast data frame - * and the destination is HT capable. - */ - ath_tx_send_ampdu(sc, tid, &bf_head, txctl, frmlen); - } else { - /* - * Send this frame as regular when ADDBA - * exchange is neither complete nor pending. - */ - ath_tx_send_normal(sc, txctl->txq, tid, &bf_head, frmlen); - } + /* + * Try aggregation if it's a unicast data frame + * and the destination is HT capable. + */ + ath_tx_send_ampdu(sc, tid, bf, txctl); } else { + INIT_LIST_HEAD(&bf_head); + list_add_tail(&bf->list, &bf_head); + bf->bf_state.bfs_ftype = txctl->frame_type; bf->bf_state.bfs_paprd = txctl->paprd; if (bf->bf_state.bfs_paprd) - ar9003_hw_set_paprd_txdesc(ah, ds, bf->bf_state.bfs_paprd); + ar9003_hw_set_paprd_txdesc(sc->sc_ah, bf->bf_desc, + bf->bf_state.bfs_paprd); - ath_tx_send_normal(sc, txctl->txq, NULL, &bf_head, frmlen); + ath_tx_send_normal(sc, txctl->txq, NULL, &bf_head, txctl->frmlen); } spin_unlock_bh(&txctl->txq->axq_lock); @@ -1749,8 +1730,14 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, struct ath_txq *txq = txctl->txq; struct ath_buf *bf; int padpos, padsize; + int frmlen = skb->len + FCS_LEN; int q; + if (info->control.hw_key) + frmlen += info->control.hw_key->icv_len; + + txctl->frmlen = frmlen; + /* * As a temporary workaround, assign seq# here; this will likely need * to be cleaned up to work better with Beacon transmission and virtual @@ -1774,7 +1761,7 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, memmove(skb->data, skb->data + padsize, padpos); } - bf = ath_tx_setup_buffer(hw, skb); + bf = ath_tx_setup_buffer(hw, txctl->txq, skb, frmlen); if (unlikely(!bf)) return -ENOMEM; -- 2.7.4