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Commit 817e11de authored by Sujith's avatar Sujith Committed by John W. Linville
Browse files

ath9k: Add a debugfs file to show interrupt statistics 



Location: ath9k/<phy>/interrupt

Signed-off-by: default avatarSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 3706de6f

drivers/net/wireless/ath9k/core.h

+55 −0
Original line number Diff line number Diff line
@@ -88,16 +88,66 @@ enum ATH_DEBUG { 


#ifdef CONFIG_ATH9K_DEBUG



/**

 * struct ath_interrupt_stats - Contains statistics about interrupts

 * @total: Total no. of interrupts generated so far

 * @rxok: RX with no errors

 * @rxeol: RX with no more RXDESC available

 * @rxorn: RX FIFO overrun

 * @txok: TX completed at the requested rate

 * @txurn: TX FIFO underrun

 * @mib: MIB regs reaching its threshold

 * @rxphyerr: RX with phy errors

 * @rx_keycache_miss: RX with key cache misses

 * @swba: Software Beacon Alert

 * @bmiss: Beacon Miss

 * @bnr: Beacon Not Ready

 * @cst: Carrier Sense TImeout

 * @gtt: Global TX Timeout

 * @tim: RX beacon TIM occurrence

 * @cabend: RX End of CAB traffic

 * @dtimsync: DTIM sync lossage

 * @dtim: RX Beacon with DTIM

 */

struct ath_interrupt_stats {

	u32 total;

	u32 rxok;

	u32 rxeol;

	u32 rxorn;

	u32 txok;

	u32 txeol;

	u32 txurn;

	u32 mib;

	u32 rxphyerr;

	u32 rx_keycache_miss;

	u32 swba;

	u32 bmiss;

	u32 bnr;

	u32 cst;

	u32 gtt;

	u32 tim;

	u32 cabend;

	u32 dtimsync;

	u32 dtim;

};



struct ath_stats {

	struct ath_interrupt_stats istats;

};



struct ath9k_debug {

	int debug_mask;

	struct dentry *debugfs_root;

	struct dentry *debugfs_phy;

	struct dentry *debugfs_dma;

	struct dentry *debugfs_interrupt;

	struct ath_stats stats;

};



void DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...);

int ath9k_init_debug(struct ath_softc *sc);

void ath9k_exit_debug(struct ath_softc *sc);

void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status);



#else
@@ -115,6 +165,11 @@ static inline void ath9k_exit_debug(struct ath_softc *sc) 
{

}



static inline void ath_debug_stat_interrupt(struct ath_softc *sc,

					    enum ath9k_int status)

{

}



#endif /* CONFIG_ATH9K_DEBUG */



struct ath_config {

drivers/net/wireless/ath9k/debug.c

+102 −0
Original line number Diff line number Diff line
@@ -128,6 +128,100 @@ static const struct file_operations fops_dma = { 
	.owner = THIS_MODULE

};





void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)

{

	if (status)

		sc->sc_debug.stats.istats.total++;

	if (status & ATH9K_INT_RX)

		sc->sc_debug.stats.istats.rxok++;

	if (status & ATH9K_INT_RXEOL)

		sc->sc_debug.stats.istats.rxeol++;

	if (status & ATH9K_INT_RXORN)

		sc->sc_debug.stats.istats.rxorn++;

	if (status & ATH9K_INT_TX)

		sc->sc_debug.stats.istats.txok++;

	if (status & ATH9K_INT_TXURN)

		sc->sc_debug.stats.istats.txurn++;

	if (status & ATH9K_INT_MIB)

		sc->sc_debug.stats.istats.mib++;

	if (status & ATH9K_INT_RXPHY)

		sc->sc_debug.stats.istats.rxphyerr++;

	if (status & ATH9K_INT_RXKCM)

		sc->sc_debug.stats.istats.rx_keycache_miss++;

	if (status & ATH9K_INT_SWBA)

		sc->sc_debug.stats.istats.swba++;

	if (status & ATH9K_INT_BMISS)

		sc->sc_debug.stats.istats.bmiss++;

	if (status & ATH9K_INT_BNR)

		sc->sc_debug.stats.istats.bnr++;

	if (status & ATH9K_INT_CST)

		sc->sc_debug.stats.istats.cst++;

	if (status & ATH9K_INT_GTT)

		sc->sc_debug.stats.istats.gtt++;

	if (status & ATH9K_INT_TIM)

		sc->sc_debug.stats.istats.tim++;

	if (status & ATH9K_INT_CABEND)

		sc->sc_debug.stats.istats.cabend++;

	if (status & ATH9K_INT_DTIMSYNC)

		sc->sc_debug.stats.istats.dtimsync++;

	if (status & ATH9K_INT_DTIM)

		sc->sc_debug.stats.istats.dtim++;

}



static ssize_t read_file_interrupt(struct file *file, char __user *user_buf,

				   size_t count, loff_t *ppos)

{

	struct ath_softc *sc = file->private_data;

	char buf[512];

	unsigned int len = 0;



	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "RX", sc->sc_debug.stats.istats.rxok);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "RXEOL", sc->sc_debug.stats.istats.rxeol);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "RXORN", sc->sc_debug.stats.istats.rxorn);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "TX", sc->sc_debug.stats.istats.txok);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "TXURN", sc->sc_debug.stats.istats.txurn);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "MIB", sc->sc_debug.stats.istats.mib);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "RXPHY", sc->sc_debug.stats.istats.rxphyerr);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "RXKCM", sc->sc_debug.stats.istats.rx_keycache_miss);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "SWBA", sc->sc_debug.stats.istats.swba);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "BMISS", sc->sc_debug.stats.istats.bmiss);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "BNR", sc->sc_debug.stats.istats.bnr);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "CST", sc->sc_debug.stats.istats.cst);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "GTT", sc->sc_debug.stats.istats.gtt);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "TIM", sc->sc_debug.stats.istats.tim);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "CABEND", sc->sc_debug.stats.istats.cabend);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "DTIMSYNC", sc->sc_debug.stats.istats.dtimsync);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "DTIM", sc->sc_debug.stats.istats.dtim);

	len += snprintf(buf + len, sizeof(buf) - len,

		"%8s: %10u\n", "TOTAL", sc->sc_debug.stats.istats.total);



	return simple_read_from_buffer(user_buf, count, ppos, buf, len);

}



static const struct file_operations fops_interrupt = {

	.read = read_file_interrupt,

	.open = ath9k_debugfs_open,

	.owner = THIS_MODULE

};



int ath9k_init_debug(struct ath_softc *sc)

{

	sc->sc_debug.debug_mask = ath9k_debug;
@@ -146,6 +240,13 @@ int ath9k_init_debug(struct ath_softc *sc) 
	if (!sc->sc_debug.debugfs_dma)

		goto err;



	sc->sc_debug.debugfs_interrupt = debugfs_create_file("interrupt",

						     S_IRUGO,

						     sc->sc_debug.debugfs_phy,

						     sc, &fops_interrupt);

	if (!sc->sc_debug.debugfs_interrupt)

		goto err;



	return 0;

err:

	ath9k_exit_debug(sc);
@@ -154,6 +255,7 @@ int ath9k_init_debug(struct ath_softc *sc) 


void ath9k_exit_debug(struct ath_softc *sc)

{

	debugfs_remove(sc->sc_debug.debugfs_interrupt);

	debugfs_remove(sc->sc_debug.debugfs_dma);

	debugfs_remove(sc->sc_debug.debugfs_phy);

	debugfs_remove(sc->sc_debug.debugfs_root);

drivers/net/wireless/ath9k/main.c

+2 −0
Original line number Diff line number Diff line
@@ -598,6 +598,8 @@ static irqreturn_t ath_isr(int irq, void *dev) 
		}

	} while (0);



	ath_debug_stat_interrupt(sc, status);



	if (sched) {

		/* turn off every interrupt except SWBA */

		ath9k_hw_set_interrupts(ah, (sc->sc_imask & ATH9K_INT_SWBA));