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Commit c0b74876 authored by Sujith Manoharan's avatar Sujith Manoharan Committed by John W. Linville
Browse files

ath9k: Add a debugfs file to dump queue statistics 



Signed-off-by: default avatarSujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 78ef731c

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

+53 −0
Original line number Diff line number Diff line
@@ -558,6 +558,50 @@ static ssize_t read_file_xmit(struct file *file, char __user *user_buf, 
	return retval;

}



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

				size_t count, loff_t *ppos)

{

	struct ath_softc *sc = file->private_data;

	struct ath_txq *txq;

	char *buf;

	unsigned int len = 0, size = 1024;

	ssize_t retval = 0;

	int i;

	char *qname[4] = {"VO", "VI", "BE", "BK"};



	buf = kzalloc(size, GFP_KERNEL);

	if (buf == NULL)

		return -ENOMEM;



	for (i = 0; i < IEEE80211_NUM_ACS; i++) {

		txq = sc->tx.txq_map[i];

		len += snprintf(buf + len, size - len, "(%s): ", qname[i]);



		ath_txq_lock(sc, txq);



		len += snprintf(buf + len, size - len, "%s: %d ",

				"qnum", txq->axq_qnum);

		len += snprintf(buf + len, size - len, "%s: %2d ",

				"qdepth", txq->axq_depth);

		len += snprintf(buf + len, size - len, "%s: %2d ",

				"ampdu-depth", txq->axq_ampdu_depth);

		len += snprintf(buf + len, size - len, "%s: %3d ",

				"pending", txq->pending_frames);

		len += snprintf(buf + len, size - len, "%s: %d\n",

				"stopped", txq->stopped);



		ath_txq_unlock(sc, txq);

	}



	if (len > size)

		len = size;



	retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);

	kfree(buf);



	return retval;

}



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

				  size_t count, loff_t *ppos)

{
@@ -828,6 +872,13 @@ static const struct file_operations fops_xmit = { 
	.llseek = default_llseek,

};



static const struct file_operations fops_queues = {

	.read = read_file_queues,

	.open = simple_open,

	.owner = THIS_MODULE,

	.llseek = default_llseek,

};



static const struct file_operations fops_stations = {

	.read = read_file_stations,

	.open = simple_open,
@@ -1553,6 +1604,8 @@ int ath9k_init_debug(struct ath_hw *ah) 
			    &fops_interrupt);

	debugfs_create_file("xmit", S_IRUSR, sc->debug.debugfs_phy, sc,

			    &fops_xmit);

	debugfs_create_file("queues", S_IRUSR, sc->debug.debugfs_phy, sc,

			    &fops_queues);

	debugfs_create_u32("qlen_bk", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,

			   &sc->tx.txq_max_pending[IEEE80211_AC_BK]);

	debugfs_create_u32("qlen_be", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,