diff options
| author | Christian Lamparter <chunkeey@web.de> | 2008-09-06 02:56:04 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-09-11 15:53:31 -0400 |
| commit | a0db663ff192e21ebb703f962308675f22fb38a8 (patch) | |
| tree | 2f886aa24c8a0af53c32b8ba0d84b43076e6214c /drivers/net | |
| parent | 3c9355222cc521ca2e8c355a9b05e773900c5dc0 (diff) | |
p54: 32-bit tsf timestamps
tcpdump:
02:15:42.874518 61112184us tsft 48.0 Mb/s 2437 MHz (0x0480) antenna 1 [0x0000000e] CF +QoS Data IV
02:15:42.874557 >>>4356079526us<<< tsft 24.0 Mb/s 2437 MHz (0x0480) antenna 1 [0x0000000e] Acknowledgment
02:15:42.976844 61214513us tsft 1.0 Mb/s 2437 MHz (0x0480) antenna 0 [0x0000000e] Beacon
as one can see on the huge jump, it's very plausible that firmware does not report the
full 64-bit mac time, just the lower 32bit and some kinds of flags...
Therefore if we want a useful timestamp we have to emulate the high bits.
Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/p54/p54.h | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/p54/p54common.c | 11 | ||||
| -rw-r--r-- | drivers/net/wireless/p54/p54common.h | 3 |
3 files changed, 14 insertions, 2 deletions
diff --git a/drivers/net/wireless/p54/p54.h b/drivers/net/wireless/p54/p54.h index 98d4f8e7d84..36b8e584c6c 100644 --- a/drivers/net/wireless/p54/p54.h +++ b/drivers/net/wireless/p54/p54.h @@ -87,6 +87,8 @@ struct p54_common { void *cached_vdcf; unsigned int fw_var; unsigned int fw_interface; + u32 tsf_low32; + u32 tsf_high32; struct ieee80211_tx_queue_stats tx_stats[8]; void *eeprom; struct completion eeprom_comp; diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c index f96f7c7e6af..526d3a282b7 100644 --- a/drivers/net/wireless/p54/p54common.c +++ b/drivers/net/wireless/p54/p54common.c @@ -426,10 +426,12 @@ EXPORT_SYMBOL_GPL(p54_parse_eeprom); static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb) { + struct p54_common *priv = dev->priv; struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data; struct ieee80211_rx_status rx_status = {0}; u16 freq = le16_to_cpu(hdr->freq); size_t header_len = sizeof(*hdr); + u32 tsf32; rx_status.signal = hdr->rssi; /* XX correct? */ @@ -438,7 +440,13 @@ static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb) rx_status.freq = freq; rx_status.band = IEEE80211_BAND_2GHZ; rx_status.antenna = hdr->antenna; - rx_status.mactime = le64_to_cpu(hdr->timestamp); + + tsf32 = le32_to_cpu(hdr->tsf32); + if (tsf32 < priv->tsf_low32) + priv->tsf_high32++; + rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32; + priv->tsf_low32 = tsf32; + rx_status.flag |= RX_FLAG_TSFT; if (hdr->magic & cpu_to_le16(0x4000)) @@ -1037,6 +1045,7 @@ static void p54_stop(struct ieee80211_hw *dev) while ((skb = skb_dequeue(&priv->tx_queue))) kfree_skb(skb); priv->stop(dev); + priv->tsf_high32 = priv->tsf_low32 = 0; priv->mode = IEEE80211_IF_TYPE_INVALID; } diff --git a/drivers/net/wireless/p54/p54common.h b/drivers/net/wireless/p54/p54common.h index 73a9a2c923d..976cbf9689b 100644 --- a/drivers/net/wireless/p54/p54common.h +++ b/drivers/net/wireless/p54/p54common.h @@ -185,7 +185,8 @@ struct p54_rx_hdr { u8 rssi; u8 quality; u16 unknown2; - __le64 timestamp; + __le32 tsf32; + __le32 unalloc0; u8 align[0]; } __attribute__ ((packed)); |