From e039fa4a4195ac4ee895e6f3d1334beed63256fe Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 15 May 2008 12:55:29 +0200 Subject: mac80211: move TX info into skb->cb This patch converts mac80211 and all drivers to have transmit information and status in skb->cb rather than allocating extra memory for it and copying all the data around. To make it fit, a union is used where only data that is necessary for all steps is kept outside of the union. A number of fixes were done by Ivo, as well as the rt2x00 part of this patch. Signed-off-by: Ivo van Doorn Signed-off-by: Johannes Berg Acked-by: David S. Miller Signed-off-by: John W. Linville --- drivers/net/wireless/ath5k/base.c | 70 ++++++++++++++++++--------------------- 1 file changed, 32 insertions(+), 38 deletions(-) (limited to 'drivers/net/wireless/ath5k/base.c') diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c index 32ee351a7650..7d97934265db 100644 --- a/drivers/net/wireless/ath5k/base.c +++ b/drivers/net/wireless/ath5k/base.c @@ -167,8 +167,7 @@ static struct pci_driver ath5k_pci_driver = { /* * Prototypes - MAC 802.11 stack related functions */ -static int ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb, - struct ieee80211_tx_control *ctl); +static int ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb); static int ath5k_reset(struct ieee80211_hw *hw); static int ath5k_start(struct ieee80211_hw *hw); static void ath5k_stop(struct ieee80211_hw *hw); @@ -196,8 +195,7 @@ static int ath5k_get_tx_stats(struct ieee80211_hw *hw, static u64 ath5k_get_tsf(struct ieee80211_hw *hw); static void ath5k_reset_tsf(struct ieee80211_hw *hw); static int ath5k_beacon_update(struct ieee80211_hw *hw, - struct sk_buff *skb, - struct ieee80211_tx_control *ctl); + struct sk_buff *skb); static struct ieee80211_ops ath5k_hw_ops = { .tx = ath5k_tx, @@ -251,9 +249,7 @@ static void ath5k_desc_free(struct ath5k_softc *sc, static int ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf); static int ath5k_txbuf_setup(struct ath5k_softc *sc, - struct ath5k_buf *bf, - struct ieee80211_tx_control *ctl); - + struct ath5k_buf *bf); static inline void ath5k_txbuf_free(struct ath5k_softc *sc, struct ath5k_buf *bf) { @@ -289,8 +285,7 @@ static void ath5k_tx_processq(struct ath5k_softc *sc, static void ath5k_tasklet_tx(unsigned long data); /* Beacon handling */ static int ath5k_beacon_setup(struct ath5k_softc *sc, - struct ath5k_buf *bf, - struct ieee80211_tx_control *ctl); + struct ath5k_buf *bf); static void ath5k_beacon_send(struct ath5k_softc *sc); static void ath5k_beacon_config(struct ath5k_softc *sc); static void ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf); @@ -1295,37 +1290,36 @@ ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf) } static int -ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf, - struct ieee80211_tx_control *ctl) +ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf) { struct ath5k_hw *ah = sc->ah; struct ath5k_txq *txq = sc->txq; struct ath5k_desc *ds = bf->desc; struct sk_buff *skb = bf->skb; + struct ieee80211_tx_info *info = (void*) skb->cb; unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID; int ret; flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK; - bf->ctl = *ctl; + /* XXX endianness */ bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); - if (ctl->flags & IEEE80211_TXCTL_NO_ACK) + if (info->flags & IEEE80211_TX_CTL_NO_ACK) flags |= AR5K_TXDESC_NOACK; pktlen = skb->len; - if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)) { - keyidx = ctl->hw_key->hw_key_idx; - pktlen += ctl->icv_len; + if (!(info->flags & IEEE80211_TX_CTL_DO_NOT_ENCRYPT)) { + keyidx = info->control.hw_key->hw_key_idx; + pktlen += info->control.icv_len; } - ret = ah->ah_setup_tx_desc(ah, ds, pktlen, ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL, (sc->power_level * 2), - ieee80211_get_tx_rate(sc->hw, ctl)->hw_value, - ctl->retry_limit, keyidx, 0, flags, 0, 0); + ieee80211_get_tx_rate(sc->hw, info)->hw_value, + info->control.retry_limit, keyidx, 0, flags, 0, 0); if (ret) goto err_unmap; @@ -1927,11 +1921,11 @@ next: static void ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq) { - struct ieee80211_tx_status txs = {}; struct ath5k_tx_status ts = {}; struct ath5k_buf *bf, *bf0; struct ath5k_desc *ds; struct sk_buff *skb; + struct ieee80211_tx_info *info; int ret; spin_lock(&txq->lock); @@ -1951,24 +1945,25 @@ ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq) } skb = bf->skb; + info = (void*) skb->cb; bf->skb = NULL; + pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE); - txs.control = bf->ctl; - txs.retry_count = ts.ts_shortretry + ts.ts_longretry / 6; + info->status.retry_count = ts.ts_shortretry + ts.ts_longretry / 6; if (unlikely(ts.ts_status)) { sc->ll_stats.dot11ACKFailureCount++; if (ts.ts_status & AR5K_TXERR_XRETRY) - txs.excessive_retries = 1; + info->status.excessive_retries = 1; else if (ts.ts_status & AR5K_TXERR_FILT) - txs.flags |= IEEE80211_TX_STATUS_TX_FILTERED; + info->flags |= IEEE80211_TX_STAT_TX_FILTERED; } else { - txs.flags |= IEEE80211_TX_STATUS_ACK; - txs.ack_signal = ts.ts_rssi; + info->flags |= IEEE80211_TX_STAT_ACK; + info->status.ack_signal = ts.ts_rssi; } - ieee80211_tx_status(sc->hw, skb, &txs); + ieee80211_tx_status(sc->hw, skb); sc->tx_stats[txq->qnum].count++; spin_lock(&sc->txbuflock); @@ -2005,10 +2000,10 @@ ath5k_tasklet_tx(unsigned long data) * Setup the beacon frame for transmit. */ static int -ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf, - struct ieee80211_tx_control *ctl) +ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf) { struct sk_buff *skb = bf->skb; + struct ieee80211_tx_info *info = (void*) skb->cb; struct ath5k_hw *ah = sc->ah; struct ath5k_desc *ds; int ret, antenna = 0; @@ -2047,7 +2042,7 @@ ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf, ret = ah->ah_setup_tx_desc(ah, ds, skb->len, ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_BEACON, (sc->power_level * 2), - ieee80211_get_tx_rate(sc->hw, ctl)->hw_value, + ieee80211_get_tx_rate(sc->hw, info)->hw_value, 1, AR5K_TXKEYIX_INVALID, antenna, flags, 0, 0); if (ret) @@ -2626,11 +2621,11 @@ ath5k_led_event(struct ath5k_softc *sc, int event) \********************/ static int -ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb, - struct ieee80211_tx_control *ctl) +ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb) { struct ath5k_softc *sc = hw->priv; struct ath5k_buf *bf; + struct ieee80211_tx_info *info = (void*) skb->cb; unsigned long flags; int hdrlen; int pad; @@ -2656,13 +2651,13 @@ ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb, memmove(skb->data, skb->data+pad, hdrlen); } - sc->led_txrate = ieee80211_get_tx_rate(hw, ctl)->hw_value; + sc->led_txrate = ieee80211_get_tx_rate(hw, info)->hw_value; spin_lock_irqsave(&sc->txbuflock, flags); if (list_empty(&sc->txbuf)) { ATH5K_ERR(sc, "no further txbuf available, dropping packet\n"); spin_unlock_irqrestore(&sc->txbuflock, flags); - ieee80211_stop_queue(hw, ctl->queue); + ieee80211_stop_queue(hw, info->queue); return -1; } bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list); @@ -2674,7 +2669,7 @@ ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb, bf->skb = skb; - if (ath5k_txbuf_setup(sc, bf, ctl)) { + if (ath5k_txbuf_setup(sc, bf)) { bf->skb = NULL; spin_lock_irqsave(&sc->txbuflock, flags); list_add_tail(&bf->list, &sc->txbuf); @@ -3052,8 +3047,7 @@ ath5k_reset_tsf(struct ieee80211_hw *hw) } static int -ath5k_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb, - struct ieee80211_tx_control *ctl) +ath5k_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb) { struct ath5k_softc *sc = hw->priv; int ret; @@ -3069,7 +3063,7 @@ ath5k_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb, ath5k_txbuf_free(sc, sc->bbuf); sc->bbuf->skb = skb; - ret = ath5k_beacon_setup(sc, sc->bbuf, ctl); + ret = ath5k_beacon_setup(sc, sc->bbuf); if (ret) sc->bbuf->skb = NULL; else -- cgit v1.2.2