From e6a9854b05c1a6af1308fe2b8c68f35abf28a3ee Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 21 Oct 2008 12:40:02 +0200 Subject: mac80211/drivers: rewrite the rate control API So after the previous changes we were still unhappy with how convoluted the API is and decided to make things simpler for everybody. This completely changes the rate control API, now taking into account 802.11n with MCS rates and more control, most drivers don't support that though. Signed-off-by: Felix Fietkau Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- drivers/net/wireless/b43legacy/dma.c | 46 +++++++++++++++++++++++++----------- 1 file changed, 32 insertions(+), 14 deletions(-) (limited to 'drivers/net/wireless/b43legacy/dma.c') diff --git a/drivers/net/wireless/b43legacy/dma.c b/drivers/net/wireless/b43legacy/dma.c index fb6819e40f38..308c2647f002 100644 --- a/drivers/net/wireless/b43legacy/dma.c +++ b/drivers/net/wireless/b43legacy/dma.c @@ -1411,6 +1411,7 @@ void b43legacy_dma_handle_txstatus(struct b43legacy_wldev *dev, struct b43legacy_dmaring *ring; struct b43legacy_dmadesc_generic *desc; struct b43legacy_dmadesc_meta *meta; + int retry_limit; int slot; ring = parse_cookie(dev, status->cookie, &slot); @@ -1437,25 +1438,42 @@ void b43legacy_dma_handle_txstatus(struct b43legacy_wldev *dev, struct ieee80211_tx_info *info; BUG_ON(!meta->skb); info = IEEE80211_SKB_CB(meta->skb); - /* Call back to inform the ieee80211 subsystem about the - * status of the transmission. - * Some fields of txstat are already filled in dma_tx(). - */ - memset(&info->status, 0, sizeof(info->status)); + /* preserve the confiured retry limit before clearing the status + * The xmit function has overwritten the rc's value with the actual + * retry limit done by the hardware */ + retry_limit = info->status.rates[0].count; + ieee80211_tx_info_clear_status(info); - if (status->acked) { + if (status->acked) info->flags |= IEEE80211_TX_STAT_ACK; + + if (status->rts_count > dev->wl->hw->conf.short_frame_max_tx_count) { + /* + * If the short retries (RTS, not data frame) have exceeded + * the limit, the hw will not have tried the selected rate, + * but will have used the fallback rate instead. + * Don't let the rate control count attempts for the selected + * rate in this case, otherwise the statistics will be off. + */ + info->status.rates[0].count = 0; + info->status.rates[1].count = status->frame_count; } else { - if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) - info->status.excessive_retries = 1; + if (status->frame_count > retry_limit) { + info->status.rates[0].count = retry_limit; + info->status.rates[1].count = status->frame_count - + retry_limit; + + } else { + info->status.rates[0].count = status->frame_count; + info->status.rates[1].idx = -1; + } } - if (status->frame_count == 0) { - /* The frame was not transmitted at all. */ - info->status.retry_count = 0; - } else - info->status.retry_count = status->frame_count - - 1; + + /* Call back to inform the ieee80211 subsystem about the + * status of the transmission. + * Some fields of txstat are already filled in dma_tx(). + */ ieee80211_tx_status_irqsafe(dev->wl->hw, meta->skb); /* skb is freed by ieee80211_tx_status_irqsafe() */ meta->skb = NULL; -- cgit v1.2.3 From 95f8e38deffc55f7108bcfa3e180bd5b3d53fc04 Mon Sep 17 00:00:00 2001 From: Ilpo Järvinen Date: Thu, 30 Oct 2008 13:43:41 +0200 Subject: b43legacy: reindent misleading statement MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Ilpo Järvinen Signed-off-by: John W. Linville --- drivers/net/wireless/b43legacy/dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/wireless/b43legacy/dma.c') diff --git a/drivers/net/wireless/b43legacy/dma.c b/drivers/net/wireless/b43legacy/dma.c index 308c2647f002..3649fc367098 100644 --- a/drivers/net/wireless/b43legacy/dma.c +++ b/drivers/net/wireless/b43legacy/dma.c @@ -919,7 +919,7 @@ struct b43legacy_dmaring *b43legacy_setup_dmaring(struct b43legacy_wldev *dev, if (!ring->txhdr_cache) goto err_kfree_meta; - dma_test = ssb_dma_map_single(dev->dev, + dma_test = ssb_dma_map_single(dev->dev, ring->txhdr_cache, sizeof(struct b43legacy_txhdr_fw3), DMA_TO_DEVICE); -- cgit v1.2.3