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ath9k: enable the baseband watchdog events for AR9003

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This enables the baseband watchdog events for the AR9003
family on ath9k. Upon an a baseband watchdog interrupt we reset
the hardware, this should address corner case conditions where
normal operation can stall. Enable ATH_DBG_RESET to be able
to review details of the bb watchdog interrupt once it happens.
If you're curious how often this happens just grep the debugfs
interrupt file.

Cc: Sam Ng <sam.ng@atheros.com>
Cc: Paul Shaw <paul.shaw@atheros.com>
Cc: Don Breslin <don.breslin@atheros.com>
Cc: Cliff Holden <cliff.holden@atheros.com
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez 2010-05-13 13:33:44 -04:00 committed by John W. Linville
parent aea702b70a
commit 08578b8f16
3 changed files with 16 additions and 1 deletions
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5
drivers/net/wireless/ath/ath9k/debug.c
View file

@ -269,6 +269,8 @@ void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)
sc->debug.stats.istats.rxlp++;
if (status & ATH9K_INT_RXHP)
sc->debug.stats.istats.rxhp++;
if (status & ATH9K_INT_BB_WATCHDOG)
sc->debug.stats.istats.bb_watchdog++;
} else {
if (status & ATH9K_INT_RX)
sc->debug.stats.istats.rxok++;
@ -319,6 +321,9 @@ static ssize_t read_file_interrupt(struct file *file, char __user *user_buf,
"%8s: %10u\n", "RXLP", sc->debug.stats.istats.rxlp);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RXHP", sc->debug.stats.istats.rxhp);
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "WATCHDOG",
sc->debug.stats.istats.bb_watchdog);
} else {
len += snprintf(buf + len, sizeof(buf) - len,
"%8s: %10u\n", "RX", sc->debug.stats.istats.rxok);

2
drivers/net/wireless/ath/ath9k/debug.h
View file

@ -53,6 +53,7 @@ struct ath_buf;
* @cabend: RX End of CAB traffic
* @dtimsync: DTIM sync lossage
* @dtim: RX Beacon with DTIM
* @bb_watchdog: Baseband watchdog
*/
struct ath_interrupt_stats {
u32 total;
@ -76,6 +77,7 @@ struct ath_interrupt_stats {
u32 cabend;
u32 dtimsync;
u32 dtim;
u32 bb_watchdog;
};
struct ath_rc_stats {

10
drivers/net/wireless/ath/ath9k/main.c
View file

@ -520,6 +520,12 @@ irqreturn_t ath_isr(int irq, void *dev)
!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
goto chip_reset;
if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
(status & ATH9K_INT_BB_WATCHDOG)) {
ar9003_hw_bb_watchdog_dbg_info(ah);
goto chip_reset;
}
if (status & ATH9K_INT_SWBA)
tasklet_schedule(&sc->bcon_tasklet);
@ -1195,7 +1201,9 @@ static int ath9k_start(struct ieee80211_hw *hw)
ATH9K_INT_GLOBAL;
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ah->imask |= ATH9K_INT_RXHP | ATH9K_INT_RXLP;
ah->imask |= ATH9K_INT_RXHP |
ATH9K_INT_RXLP |
ATH9K_INT_BB_WATCHDOG;
else
ah->imask |= ATH9K_INT_RX;