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Commit 78fc4856 authored by Vasanthakumar Thiagarajan's avatar Vasanthakumar Thiagarajan Committed by Kalle Valo
Browse files

ath6kl: Add debugfs file entry to dump credit distribution stats 



It would be at <dbgfs_root>/ieee80211/phyX/ath6kl/credit_dist_stats.

Signed-off-by: default avatarVasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Signed-off-by: default avatarKalle Valo <kvalo@qca.qualcomm.com>
parent 03f68a95

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

+69 −0
Original line number Diff line number Diff line
@@ -290,6 +290,72 @@ static const struct file_operations fops_tgt_stats = { 
	.llseek = default_llseek,

};



#define print_credit_info(fmt_str, ep_list_field)		\

	(len += scnprintf(buf + len, buf_len - len, fmt_str,	\

			 ep_list->ep_list_field))

#define CREDIT_INFO_DISPLAY_STRING_LEN	200

#define CREDIT_INFO_LEN	128



static ssize_t read_file_credit_dist_stats(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;

	struct htc_endpoint_credit_dist *ep_list;

	char *buf;

	unsigned int buf_len, len = 0;

	ssize_t ret_cnt;



	buf_len = CREDIT_INFO_DISPLAY_STRING_LEN +

		  get_queue_depth(&target->cred_dist_list) * CREDIT_INFO_LEN;

	buf = kzalloc(buf_len, GFP_KERNEL);

	if (!buf)

		return -ENOMEM;



	len += scnprintf(buf + len, buf_len - len, "%25s%5d\n",

			 "Total Avail Credits: ",

			 target->cred_dist_cntxt->total_avail_credits);

	len += scnprintf(buf + len, buf_len - len, "%25s%5d\n",

			 "Free credits :",

			 target->cred_dist_cntxt->cur_free_credits);



	len += scnprintf(buf + len, buf_len - len,

			 " Epid  Flags    Cred_norm  Cred_min  Credits  Cred_assngd"

			 "  Seek_cred  Cred_sz  Cred_per_msg  Cred_to_dist"

			 "  qdepth\n");



	list_for_each_entry(ep_list, &target->cred_dist_list, list) {

		print_credit_info("  %2d", endpoint);

		print_credit_info("%10x", dist_flags);

		print_credit_info("%8d", cred_norm);

		print_credit_info("%9d", cred_min);

		print_credit_info("%9d", credits);

		print_credit_info("%10d", cred_assngd);

		print_credit_info("%13d", seek_cred);

		print_credit_info("%12d", cred_sz);

		print_credit_info("%9d", cred_per_msg);

		print_credit_info("%14d", cred_to_dist);

		len += scnprintf(buf + len, buf_len - len, "%12d\n",

				 get_queue_depth(&((struct htc_endpoint *)

						 ep_list->htc_rsvd)->txq));

	}



	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 const struct file_operations fops_credit_dist_stats = {

	.read = read_file_credit_dist_stats,

	.open = ath6kl_debugfs_open,

	.owner = THIS_MODULE,

	.llseek = default_llseek,

};



int ath6kl_debug_init(struct ath6kl *ar)

{

	ar->debugfs_phy = debugfs_create_dir("ath6kl",
@@ -300,6 +366,9 @@ int ath6kl_debug_init(struct ath6kl *ar) 
	debugfs_create_file("tgt_stats", S_IRUSR, ar->debugfs_phy, ar,

			    &fops_tgt_stats);



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

			    &fops_credit_dist_stats);



	return 0;

}

#endif