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authorChristian Lamparter <chunkeey@web.de>2008-09-06 02:56:04 +0200
committerJohn W. Linville <linville@tuxdriver.com>2008-09-11 15:53:31 -0400
commita0db663ff192e21ebb703f962308675f22fb38a8 (patch)
tree2f886aa24c8a0af53c32b8ba0d84b43076e6214c /drivers/net/wireless
parent3c9355222cc521ca2e8c355a9b05e773900c5dc0 (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/wireless')
-rw-r--r--drivers/net/wireless/p54/p54.h2
-rw-r--r--drivers/net/wireless/p54/p54common.c11
-rw-r--r--drivers/net/wireless/p54/p54common.h3
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));