diff options
Diffstat (limited to 'drivers/net/wireless/p54/txrx.c')
| -rw-r--r-- | drivers/net/wireless/p54/txrx.c | 73 |
1 files changed, 72 insertions, 1 deletions
diff --git a/drivers/net/wireless/p54/txrx.c b/drivers/net/wireless/p54/txrx.c index 042842e..6ed9c32 100644 --- a/drivers/net/wireless/p54/txrx.c +++ b/drivers/net/wireless/p54/txrx.c @@ -16,9 +16,11 @@ * published by the Free Software Foundation. */ +#include <linux/export.h> #include <linux/init.h> #include <linux/firmware.h> #include <linux/etherdevice.h> +#include <asm/div64.h> #include <net/mac80211.h> @@ -507,6 +509,8 @@ static void p54_rx_stats(struct p54_common *priv, struct sk_buff *skb) struct p54_hdr *hdr = (struct p54_hdr *) skb->data; struct p54_statistics *stats = (struct p54_statistics *) hdr->data; struct sk_buff *tmp; + struct ieee80211_channel *chan; + unsigned int i, rssi, tx, cca, dtime, dtotal, dcca, dtx, drssi, unit; u32 tsf32; if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) @@ -523,8 +527,75 @@ static void p54_rx_stats(struct p54_common *priv, struct sk_buff *skb) priv->noise = p54_rssi_to_dbm(priv, le32_to_cpu(stats->noise)); + /* + * STSW450X LMAC API page 26 - 3.8 Statistics + * "The exact measurement period can be derived from the + * timestamp member". + */ + dtime = tsf32 - priv->survey_raw.timestamp; + + /* + * STSW450X LMAC API page 26 - 3.8.1 Noise histogram + * The LMAC samples RSSI, CCA and transmit state at regular + * periods (typically 8 times per 1k [as in 1024] usec). + */ + cca = le32_to_cpu(stats->sample_cca); + tx = le32_to_cpu(stats->sample_tx); + rssi = 0; + for (i = 0; i < ARRAY_SIZE(stats->sample_noise); i++) + rssi += le32_to_cpu(stats->sample_noise[i]); + + dcca = cca - priv->survey_raw.cached_cca; + drssi = rssi - priv->survey_raw.cached_rssi; + dtx = tx - priv->survey_raw.cached_tx; + dtotal = dcca + drssi + dtx; + + /* + * update statistics when more than a second is over since the + * last call, or when a update is badly needed. + */ + if (dtotal && (priv->update_stats || dtime >= USEC_PER_SEC) && + dtime >= dtotal) { + priv->survey_raw.timestamp = tsf32; + priv->update_stats = false; + unit = dtime / dtotal; + + if (dcca) { + priv->survey_raw.cca += dcca * unit; + priv->survey_raw.cached_cca = cca; + } + if (dtx) { + priv->survey_raw.tx += dtx * unit; + priv->survey_raw.cached_tx = tx; + } + if (drssi) { + priv->survey_raw.rssi += drssi * unit; + priv->survey_raw.cached_rssi = rssi; + } + + /* 1024 usec / 8 times = 128 usec / time */ + if (!(priv->phy_ps || priv->phy_idle)) + priv->survey_raw.active += dtotal * unit; + else + priv->survey_raw.active += (dcca + dtx) * unit; + } + + chan = priv->curchan; + if (chan) { + struct survey_info *survey = &priv->survey[chan->hw_value]; + survey->noise = clamp_t(s8, priv->noise, -128, 127); + survey->channel_time = priv->survey_raw.active; + survey->channel_time_tx = priv->survey_raw.tx; + survey->channel_time_busy = priv->survey_raw.tx + + priv->survey_raw.cca; + do_div(survey->channel_time, 1024); + do_div(survey->channel_time_tx, 1024); + do_div(survey->channel_time_busy, 1024); + } + tmp = p54_find_and_unlink_skb(priv, hdr->req_id); dev_kfree_skb_any(tmp); + complete(&priv->stat_comp); } static void p54_rx_trap(struct p54_common *priv, struct sk_buff *skb) @@ -619,7 +690,7 @@ static void p54_tx_80211_header(struct p54_common *priv, struct sk_buff *skb, if (!(info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)) *flags |= P54_HDR_FLAG_DATA_OUT_SEQNR; - if (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE) + if (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE) *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL; if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) |