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wl1271: Update TX packet life time handling with higher resolution time

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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 <juuso.oikarinen@nokia.com>
Reviewed-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Juuso Oikarinen
2010-02-22 08:38:38 +02:00
committed by John W. Linville
parent 1e73eb62ce
commit ac5e1e39c1
3 changed files with 10 additions and 5 deletions
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7
drivers/net/wireless/wl12xx/wl1271_tx.c
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@@ -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 */