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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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2
drivers/net/wireless/wl12xx/wl1271.h
View File

@ -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;

6
drivers/net/wireless/wl12xx/wl1271_main.c
View File

@ -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

7
drivers/net/wireless/wl12xx/wl1271_tx.c
View File

@ -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 */