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authorLuis R. Rodriguez <lrodriguez@atheros.com>2010-05-13 13:33:44 -0400
committerJohn W. Linville <linville@tuxdriver.com>2010-06-02 16:13:00 -0400
commit08578b8f16ca551499c54f2cd229df3e58c8f381 (patch)
treefb44cbd61cdad7494a63fa6b35a3936e4f792162
parentaea702b70ae0964c16e17944e4a5ce2c2b038ced (diff)
ath9k: enable the baseband watchdog events for AR9003
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>
-rw-r--r--drivers/net/wireless/ath/ath9k/debug.c5
-rw-r--r--drivers/net/wireless/ath/ath9k/debug.h2
-rw-r--r--drivers/net/wireless/ath/ath9k/main.c10
3 files changed, 16 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index 29898f8d1893..ee8387740ebe 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -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);
diff --git a/drivers/net/wireless/ath/ath9k/debug.h b/drivers/net/wireless/ath/ath9k/debug.h
index 5147b8709e10..5d21704e87ff 100644
--- a/drivers/net/wireless/ath/ath9k/debug.h
+++ b/drivers/net/wireless/ath/ath9k/debug.h
@@ -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 {
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index abfa0493236f..b98b2f2ed07d 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -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;