drivers/net/wireless/ath/ath10k/debugfs_sta.c

/*
 * Copyright (c) 2014 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "core.h"
#include "wmi-ops.h"
#include "debug.h"

static ssize_t ath10k_dbg_sta_read_aggr_mode(struct file *file,
					     char __user *user_buf,
					     size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	char buf[32];
	int len = 0;

	mutex_lock(&ar->conf_mutex);
	len = scnprintf(buf, sizeof(buf) - len, "aggregation mode: %s\n",
			(arsta->aggr_mode == ATH10K_DBG_AGGR_MODE_AUTO) ?
			"auto" : "manual");
	mutex_unlock(&ar->conf_mutex);

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

static ssize_t ath10k_dbg_sta_write_aggr_mode(struct file *file,
					      const char __user *user_buf,
					      size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	u32 aggr_mode;
	int ret;

	if (kstrtouint_from_user(user_buf, count, 0, &aggr_mode))
		return -EINVAL;

	if (aggr_mode >= ATH10K_DBG_AGGR_MODE_MAX)
		return -EINVAL;

	mutex_lock(&ar->conf_mutex);
	if ((ar->state != ATH10K_STATE_ON) ||
	    (aggr_mode == arsta->aggr_mode)) {
		ret = count;
		goto out;
	}

	ret = ath10k_wmi_addba_clear_resp(ar, arsta->arvif->vdev_id, sta->addr);
	if (ret) {
		ath10k_warn(ar, "failed to clear addba session ret: %d\n", ret);
		goto out;
	}

	arsta->aggr_mode = aggr_mode;
out:
	mutex_unlock(&ar->conf_mutex);
	return ret;
}

static const struct file_operations fops_aggr_mode = {
	.read = ath10k_dbg_sta_read_aggr_mode,
	.write = ath10k_dbg_sta_write_aggr_mode,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

void ath10k_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, struct dentry *dir)
{
	debugfs_create_file("aggr_mode", S_IRUGO | S_IWUSR, dir, sta,
			    &fops_aggr_mode);
}