From 2f7fe87034298d94301315ba4bb65c7284c709d0 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sun, 5 Oct 2008 18:05:48 +0200 Subject: [PATCH] ath5k: implement multi-rate retry support, fix tx status reporting Clean up the tx status reporting, fix retry counters (short retries are virtual collisions, not actual retries). Implement multi-rate retry support. This also fixes strong throughput fluctuations with rc80211_pid Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- drivers/net/wireless/ath5k/ath5k.h | 4 +- drivers/net/wireless/ath5k/base.c | 48 +++++++++++++++++++-- drivers/net/wireless/ath5k/desc.c | 69 ++++++++++++++++++++---------- 3 files changed, 95 insertions(+), 26 deletions(-) diff --git a/drivers/net/wireless/ath5k/ath5k.h b/drivers/net/wireless/ath5k/ath5k.h index 7134c40d6a69..53ea439aff48 100644 --- a/drivers/net/wireless/ath5k/ath5k.h +++ b/drivers/net/wireless/ath5k/ath5k.h @@ -431,7 +431,9 @@ struct ath5k_tx_status { u16 ts_seqnum; u16 ts_tstamp; u8 ts_status; - u8 ts_rate; + u8 ts_rate[4]; + u8 ts_retry[4]; + u8 ts_final_idx; s8 ts_rssi; u8 ts_shortretry; u8 ts_longretry; diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c index 47be49acf55e..9b95c4049b31 100644 --- a/drivers/net/wireless/ath5k/base.c +++ b/drivers/net/wireless/ath5k/base.c @@ -541,6 +541,12 @@ ath5k_pci_probe(struct pci_dev *pdev, goto err_irq; } + /* set up multi-rate retry capabilities */ + if (sc->ah->ah_version == AR5K_AR5212) { + hw->max_altrates = 3; + hw->max_altrate_tries = 11; + } + /* Finish private driver data initialization */ ret = ath5k_attach(pdev, hw); if (ret) @@ -1173,7 +1179,9 @@ ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf) struct sk_buff *skb = bf->skb; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID; - int ret; + struct ieee80211_rate *rate; + unsigned int mrr_rate[3], mrr_tries[3]; + int i, ret; flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK; @@ -1198,6 +1206,22 @@ ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf) if (ret) goto err_unmap; + memset(mrr_rate, 0, sizeof(mrr_rate)); + memset(mrr_tries, 0, sizeof(mrr_tries)); + for (i = 0; i < 3; i++) { + rate = ieee80211_get_alt_retry_rate(sc->hw, info, i); + if (!rate) + break; + + mrr_rate[i] = rate->hw_value; + mrr_tries[i] = info->control.retries[i].limit; + } + + ah->ah_setup_mrr_tx_desc(ah, ds, + mrr_rate[0], mrr_tries[0], + mrr_rate[1], mrr_tries[1], + mrr_rate[2], mrr_tries[2]); + ds->ds_link = 0; ds->ds_data = bf->skbaddr; @@ -1814,7 +1838,7 @@ ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq) struct ath5k_desc *ds; struct sk_buff *skb; struct ieee80211_tx_info *info; - int ret; + int i, ret; spin_lock(&txq->lock); list_for_each_entry_safe(bf, bf0, &txq->q, list) { @@ -1836,7 +1860,25 @@ ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq) pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE); - info->status.retry_count = ts.ts_shortretry + ts.ts_longretry / 6; + memset(&info->status, 0, sizeof(info->status)); + info->tx_rate_idx = ath5k_hw_to_driver_rix(sc, + ts.ts_rate[ts.ts_final_idx]); + info->status.retry_count = ts.ts_longretry; + + for (i = 0; i < 4; i++) { + struct ieee80211_tx_altrate *r = + &info->status.retries[i]; + + if (ts.ts_rate[i]) { + r->rate_idx = ath5k_hw_to_driver_rix(sc, ts.ts_rate[i]); + r->limit = ts.ts_retry[i]; + } else { + r->rate_idx = -1; + r->limit = 0; + } + } + + info->status.excessive_retries = 0; if (unlikely(ts.ts_status)) { sc->ll_stats.dot11ACKFailureCount++; if (ts.ts_status & AR5K_TXERR_XRETRY) diff --git a/drivers/net/wireless/ath5k/desc.c b/drivers/net/wireless/ath5k/desc.c index d45b90a6e06c..dd1374052ba9 100644 --- a/drivers/net/wireless/ath5k/desc.c +++ b/drivers/net/wireless/ath5k/desc.c @@ -318,6 +318,15 @@ ath5k_hw_setup_mrr_tx_desc(struct ath5k_hw *ah, struct ath5k_desc *desc, return 0; } +/* no mrr support for cards older than 5212 */ +static int +ath5k_hw_setup_no_mrr(struct ath5k_hw *ah, struct ath5k_desc *desc, + unsigned int tx_rate1, u_int tx_tries1, u_int tx_rate2, + u_int tx_tries2, unsigned int tx_rate3, u_int tx_tries3) +{ + return 0; +} + /* * Proccess the tx status descriptor on 5210/5211 */ @@ -352,8 +361,10 @@ static int ath5k_hw_proc_2word_tx_status(struct ath5k_hw *ah, AR5K_DESC_TX_STATUS1_ACK_SIG_STRENGTH); ts->ts_antenna = 1; ts->ts_status = 0; - ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_0, + ts->ts_rate[0] = AR5K_REG_MS(tx_ctl->tx_control_0, AR5K_2W_TX_DESC_CTL0_XMIT_RATE); + ts->ts_retry[0] = ts->ts_longretry; + ts->ts_final_idx = 0; if (!(tx_status->tx_status_0 & AR5K_DESC_TX_STATUS0_FRAME_XMIT_OK)) { if (tx_status->tx_status_0 & @@ -405,29 +416,43 @@ static int ath5k_hw_proc_4word_tx_status(struct ath5k_hw *ah, AR5K_DESC_TX_STATUS1_XMIT_ANTENNA) ? 2 : 1; ts->ts_status = 0; - switch (AR5K_REG_MS(tx_status->tx_status_1, - AR5K_DESC_TX_STATUS1_FINAL_TS_INDEX)) { - case 0: - ts->ts_rate = tx_ctl->tx_control_3 & - AR5K_4W_TX_DESC_CTL3_XMIT_RATE0; - break; + ts->ts_final_idx = AR5K_REG_MS(tx_status->tx_status_1, + AR5K_DESC_TX_STATUS1_FINAL_TS_INDEX); + + /* The longretry counter has the number of un-acked retries + * for the final rate. To get the total number of retries + * we have to add the retry counters for the other rates + * as well + */ + ts->ts_retry[ts->ts_final_idx] = ts->ts_longretry; + switch (ts->ts_final_idx) { + case 3: + ts->ts_rate[3] = AR5K_REG_MS(tx_ctl->tx_control_3, + AR5K_4W_TX_DESC_CTL3_XMIT_RATE3); + + ts->ts_retry[2] = AR5K_REG_MS(tx_ctl->tx_control_2, + AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2); + ts->ts_longretry += ts->ts_retry[2]; + /* fall through */ + case 2: + ts->ts_rate[2] = AR5K_REG_MS(tx_ctl->tx_control_3, + AR5K_4W_TX_DESC_CTL3_XMIT_RATE2); + + ts->ts_retry[1] = AR5K_REG_MS(tx_ctl->tx_control_2, + AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1); + ts->ts_longretry += ts->ts_retry[1]; + /* fall through */ case 1: - ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3, + ts->ts_rate[1] = AR5K_REG_MS(tx_ctl->tx_control_3, AR5K_4W_TX_DESC_CTL3_XMIT_RATE1); - ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2, + + ts->ts_retry[0] = AR5K_REG_MS(tx_ctl->tx_control_2, AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1); - break; - case 2: - ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3, - AR5K_4W_TX_DESC_CTL3_XMIT_RATE2); - ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2, - AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2); - break; - case 3: - ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3, - AR5K_4W_TX_DESC_CTL3_XMIT_RATE3); - ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2, - AR5K_4W_TX_DESC_CTL2_XMIT_TRIES3); + ts->ts_longretry += ts->ts_retry[0]; + /* fall through */ + case 0: + ts->ts_rate[0] = tx_ctl->tx_control_3 & + AR5K_4W_TX_DESC_CTL3_XMIT_RATE0; break; } @@ -653,7 +678,7 @@ int ath5k_hw_init_desc_functions(struct ath5k_hw *ah) } else { ah->ah_setup_rx_desc = ath5k_hw_setup_rx_desc; ah->ah_setup_tx_desc = ath5k_hw_setup_2word_tx_desc; - ah->ah_setup_mrr_tx_desc = ath5k_hw_setup_mrr_tx_desc; + ah->ah_setup_mrr_tx_desc = ath5k_hw_setup_no_mrr; ah->ah_proc_tx_desc = ath5k_hw_proc_2word_tx_status; } -- GitLab