From ac5e1e39c1eeaaff7e6f03bf7cf7a444b42fbc23 Mon Sep 17 00:00:00 2001 From: Juuso Oikarinen Date: Mon, 22 Feb 2010 08:38:38 +0200 Subject: [PATCH] wl1271: Update TX packet life time handling with higher resolution time This patch uses a higher precision timer to synchronize with the firmware clock. Improved precision is needed as on some platforms a jiffy may be up to tens of milliseconds, and the required precision is closer to TU's. Signed-off-by: Juuso Oikarinen Reviewed-by: Teemu Paasikivi Signed-off-by: John W. Linville --- drivers/net/wireless/wl12xx/wl1271.h | 2 +- drivers/net/wireless/wl12xx/wl1271_main.c | 6 ++++-- drivers/net/wireless/wl12xx/wl1271_tx.c | 7 +++++-- 3 files changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/wl12xx/wl1271.h b/drivers/net/wireless/wl12xx/wl1271.h index 457ce725027a..41de47caa201 100644 --- a/drivers/net/wireless/wl12xx/wl1271.h +++ b/drivers/net/wireless/wl12xx/wl1271.h @@ -404,7 +404,7 @@ struct wl1271 { u32 tx_packets_count; /* Time-offset between host and chipset clocks */ - int time_offset; + s64 time_offset; /* Session counter for the chipset */ int session_counter; diff --git a/drivers/net/wireless/wl12xx/wl1271_main.c b/drivers/net/wireless/wl12xx/wl1271_main.c index 9f7416864053..4c4d22acaeea 100644 --- a/drivers/net/wireless/wl12xx/wl1271_main.c +++ b/drivers/net/wireless/wl12xx/wl1271_main.c @@ -374,6 +374,7 @@ static void wl1271_power_on(struct wl1271 *wl) static void wl1271_fw_status(struct wl1271 *wl, struct wl1271_fw_status *status) { + struct timespec ts; u32 total = 0; int i; @@ -402,8 +403,9 @@ static void wl1271_fw_status(struct wl1271 *wl, ieee80211_queue_work(wl->hw, &wl->tx_work); /* update the host-chipset time offset */ - wl->time_offset = jiffies_to_usecs(jiffies) - - le32_to_cpu(status->fw_localtime); + getnstimeofday(&ts); + wl->time_offset = (timespec_to_ns(&ts) >> 10) - + (s64)le32_to_cpu(status->fw_localtime); } #define WL1271_IRQ_MAX_LOOPS 10 diff --git a/drivers/net/wireless/wl12xx/wl1271_tx.c b/drivers/net/wireless/wl12xx/wl1271_tx.c index 7926471cd095..a32d3014781d 100644 --- a/drivers/net/wireless/wl12xx/wl1271_tx.c +++ b/drivers/net/wireless/wl12xx/wl1271_tx.c @@ -86,8 +86,10 @@ static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra) static int wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb, u32 extra, struct ieee80211_tx_info *control) { + struct timespec ts; struct wl1271_tx_hw_descr *desc; int pad, ac; + s64 hosttime; u16 tx_attr; desc = (struct wl1271_tx_hw_descr *) skb->data; @@ -101,8 +103,9 @@ static int wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb, } /* configure packet life time */ - desc->start_time = cpu_to_le32(jiffies_to_usecs(jiffies) - - wl->time_offset); + getnstimeofday(&ts); + hosttime = (timespec_to_ns(&ts) >> 10); + desc->start_time = cpu_to_le32(hosttime - wl->time_offset); desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); /* configure the tx attributes */ -- 2.39.5