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Commit e8091281 authored by Jouni Malinen's avatar Jouni Malinen Committed by Kalle Valo
Browse files

ath6kl: Add endpoint_stats debugfs file 



This file can be used to fetch endpoint statistics counters and
to clear them by writing 0 to it.

Signed-off-by: default avatarJouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: default avatarKalle Valo <kvalo@qca.qualcomm.com>
parent 6981ffdc

drivers/net/wireless/ath/ath6kl/debug.c

+102 −0
Original line number Diff line number Diff line
@@ -595,6 +595,105 @@ static const struct file_operations fops_credit_dist_stats = { 
	.llseek = default_llseek,

};



static unsigned int print_endpoint_stat(struct htc_target *target, char *buf,

					unsigned int buf_len, unsigned int len,

					int offset, const char *name)

{

	int i;

	struct htc_endpoint_stats *ep_st;

	u32 *counter;



	len += scnprintf(buf + len, buf_len - len, "%s:", name);

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

		ep_st = &target->endpoint[i].ep_st;

		counter = ((u32 *) ep_st) + (offset / 4);

		len += scnprintf(buf + len, buf_len - len, " %u", *counter);

	}

	len += scnprintf(buf + len, buf_len - len, "\n");



	return len;

}



static ssize_t ath6kl_endpoint_stats_read(struct file *file,

					  char __user *user_buf,

					  size_t count, loff_t *ppos)

{

	struct ath6kl *ar = file->private_data;

	struct htc_target *target = ar->htc_target;

	char *buf;

	unsigned int buf_len, len = 0;

	ssize_t ret_cnt;



	buf_len = 1000 + ENDPOINT_MAX * 100;

	buf = kzalloc(buf_len, GFP_KERNEL);

	if (!buf)

		return -ENOMEM;



#define EPSTAT(name)							\

	len = print_endpoint_stat(target, buf, buf_len, len,		\

				  offsetof(struct htc_endpoint_stats, name), \

				  #name)

	EPSTAT(cred_low_indicate);

	EPSTAT(tx_issued);

	EPSTAT(tx_pkt_bundled);

	EPSTAT(tx_bundles);

	EPSTAT(tx_dropped);

	EPSTAT(tx_cred_rpt);

	EPSTAT(cred_rpt_from_rx);

	EPSTAT(cred_rpt_ep0);

	EPSTAT(cred_from_rx);

	EPSTAT(cred_from_other);

	EPSTAT(cred_from_ep0);

	EPSTAT(cred_cosumd);

	EPSTAT(cred_retnd);

	EPSTAT(rx_pkts);

	EPSTAT(rx_lkahds);

	EPSTAT(rx_bundl);

	EPSTAT(rx_bundle_lkahd);

	EPSTAT(rx_bundle_from_hdr);

	EPSTAT(rx_alloc_thresh_hit);

	EPSTAT(rxalloc_thresh_byte);

#undef EPSTAT



	if (len > buf_len)

		len = buf_len;



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

	kfree(buf);

	return ret_cnt;

}



static ssize_t ath6kl_endpoint_stats_write(struct file *file,

					   const char __user *user_buf,

					   size_t count, loff_t *ppos)

{

	struct ath6kl *ar = file->private_data;

	struct htc_target *target = ar->htc_target;

	int ret, i;

	u32 val;

	struct htc_endpoint_stats *ep_st;



	ret = kstrtou32_from_user(user_buf, count, 0, &val);

	if (ret)

		return ret;

	if (val == 0) {

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

			ep_st = &target->endpoint[i].ep_st;

			memset(ep_st, 0, sizeof(*ep_st));

		}

	}



	return count;

}



static const struct file_operations fops_endpoint_stats = {

	.open = ath6kl_debugfs_open,

	.read = ath6kl_endpoint_stats_read,

	.write = ath6kl_endpoint_stats_write,

	.owner = THIS_MODULE,

	.llseek = default_llseek,

};



static unsigned long ath6kl_get_num_reg(void)

{

	int i;
@@ -901,6 +1000,9 @@ int ath6kl_debug_init(struct ath6kl *ar) 
	debugfs_create_file("credit_dist_stats", S_IRUSR, ar->debugfs_phy, ar,

			    &fops_credit_dist_stats);



	debugfs_create_file("endpoint_stats", S_IRUSR | S_IWUSR,

			    ar->debugfs_phy, ar, &fops_endpoint_stats);



	debugfs_create_file("fwlog", S_IRUSR, ar->debugfs_phy, ar,

			    &fops_fwlog);