Commit 08578b8f authored by Luis R. Rodriguez's avatar Luis R. Rodriguez Committed by John W. Linville
Browse files

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: default avatarLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent aea702b7

drivers/net/wireless/ath/ath9k/debug.c

+5 −0
Original line number Diff line number Diff line
@@ -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);

drivers/net/wireless/ath/ath9k/debug.h

+2 −0
Original line number Diff line number Diff line
@@ -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 {

drivers/net/wireless/ath/ath9k/main.c

+9 −1
Original line number Diff line number Diff line
@@ -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;

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