/*
 * Copyright (c) 2012 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 <linux/skbuff.h>
#include <linux/export.h>
#include "core.h"
#include "wmi.h"
#include "debug.h"
#include "debugfs_pri.h"

#ifdef CONFIG_ATH6KL_DEBUG

struct wmi_set_inact_period_cmd {
	__le32 inact_period;
	u8 num_null_func;
} __packed;

static inline struct sk_buff *ath6kl_wmi_get_new_buf_pri(u32 size)
{
	struct sk_buff *skb;

	skb = ath6kl_buf_alloc(size);
	if (!skb)
		return NULL;

	skb_put(skb, size);
	if (size)
		memset(skb->data, 0, size);

	return skb;
}

static int ath6kl_wmi_inact_period_cmd(struct wmi *wmi, u32 inact_period,
				       u8 num_null_func)
{
	struct sk_buff *skb;
	struct wmi_set_inact_period_cmd *cmd;
	int ret;

	skb = ath6kl_wmi_get_new_buf_pri(sizeof(*cmd));
	if (!skb)
		return -ENOMEM;

	cmd = (struct wmi_set_inact_period_cmd *) skb->data;
	cmd->inact_period = cpu_to_le32(inact_period);
	cmd->num_null_func = num_null_func;

	ret = ath6kl_wmi_cmd_send(wmi, 0, skb, WMI_AP_CONN_INACT_CMDID,
				  NO_SYNC_WMIFLAG);

	return ret;
}

static int ath6kl_wmi_set_err_report_bitmask(struct wmi *wmi, u8 if_idx,
					     u32 mask)
{
	struct sk_buff *skb;
	struct wmi_tgt_err_report_mask *cmd;
	int ret;

	skb = ath6kl_wmi_get_new_buf_pri(sizeof(*cmd));
	if (!skb)
		return -ENOMEM;

	cmd = (struct wmi_tgt_err_report_mask *) skb->data;
	cmd->mask = cpu_to_le32(mask);
	ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb,
				  WMI_TARGET_ERROR_REPORT_BITMASK_CMDID,
				  NO_SYNC_WMIFLAG);
	return ret;
}

int ath6kl_wmi_error_report_event(struct wmi *wmi, u8 *data, int len)
{
	struct wmi_tgt_err_report_evt *report;

	if (len < sizeof(*report))
		return -EINVAL;

	report = (struct wmi_tgt_err_report_evt *) data;
	ath6kl_dbg(ATH6KL_DBG_WMI, "Reason for error report: 0x%x\n",
		   report->err_val);

	return 0;
}

static int ath6kl_debugfs_open_pri(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}

static ssize_t ath6kl_inact_period_write(struct file *file,
					 const char __user *user_buf,
					 size_t count, loff_t *ppos)
{
	struct ath6kl *ar = file->private_data;
	int ret;
	char buf[32];
	u32 inact_period;
	size_t len;

	if (WARN_ON(!test_bit(WMI_READY, &ar->flag)))
		return -EIO;

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len))
		return -EFAULT;

	buf[len] = '\0';
	if (kstrtou32(buf, 0, &inact_period))
		return -EINVAL;

	ret = ath6kl_wmi_inact_period_cmd(ar->wmi, inact_period, 0);

	if (ret)
		return ret;

	return count;
}

static const struct file_operations fops_inact_period = {
	.write = ath6kl_inact_period_write,
	.open = ath6kl_debugfs_open_pri,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath6kl_bmisstime_write(struct file *file,
				      const char __user *user_buf,
				      size_t count, loff_t *ppos)
{
	struct ath6kl *ar = file->private_data;
	struct ath6kl_vif *vif;
	u16 bmiss_time;
	char buf[32];
	ssize_t len;

	if (WARN_ON(!test_bit(WMI_READY, &ar->flag)))
		return -EIO;

	vif = ath6kl_vif_first(ar);
	if (!vif)
		return -EIO;

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len))
		return -EFAULT;

	buf[len] = '\0';
	if (kstrtou16(buf, 0, &bmiss_time))
		return -EINVAL;

	vif->bmiss_time_t = bmiss_time;

	/* Enable error report event for bmiss */
	ath6kl_wmi_set_err_report_bitmask(ar->wmi, vif->fw_vif_idx,
					  ATH6KL_ERR_REPORT_BMISS_MASK);

	ath6kl_wmi_bmisstime_cmd(ar->wmi, vif->fw_vif_idx,
				 vif->bmiss_time_t, 0);
	return count;
}

static ssize_t ath6kl_bmisstime_read(struct file *file,
				     char __user *user_buf,
				     size_t count, loff_t *ppos)
{
	struct ath6kl *ar = file->private_data;
	struct ath6kl_vif *vif;
	char buf[32];
	int len;

	vif = ath6kl_vif_first(ar);
	if (!vif)
		return -EIO;

	len = scnprintf(buf, sizeof(buf), "%u\n", vif->bmiss_time_t);

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

static const struct file_operations fops_bmisstime = {
	.read = ath6kl_bmisstime_read,
	.write = ath6kl_bmisstime_write,
	.open = ath6kl_debugfs_open_pri,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath6kl_max_num_sta_write(struct file *file,
				      const char __user *user_buf,
				      size_t count, loff_t *ppos)
{
	struct ath6kl *ar = file->private_data;
	int ret;
	u8 val;

	if (WARN_ON(!test_bit(WMI_READY, &ar->flag)))
		return -EIO;

	ret = kstrtou8_from_user(user_buf, count, 0, &val);
	if (ret)
		return ret;

	ret = ath6kl_wmi_ap_set_num_sta(ar->wmi, 0, val);
	if (ret)
		return ret;

	return count;
}
static const struct file_operations fops_max_num_sta = {
	.open = ath6kl_debugfs_open_pri,
	.write = ath6kl_max_num_sta_write,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath6kl_tp_track_write(struct file *file,
				      const char __user *user_buf,
				      size_t count, loff_t *ppos)
{
	struct ath6kl_tp_ctl tp_ctl;
	struct ath6kl *ar = file->private_data;
	char *sptr, *token;
	char buf[200];
	ssize_t len;
	u32 val32;

	len = min(count, sizeof(buf) - 1);

	if (copy_from_user(buf, user_buf, len))
		return -EFAULT;
	buf[len] = '\0';
	sptr = buf;

	token = strsep(&sptr, " ");
	if (!token)
		return -EINVAL;

	if (kstrtou32(token, 0, &val32))
		return -EINVAL;
	tp_ctl.thr_type = (unsigned int)(val32);

	token = strsep(&sptr, " ");
	if (!token)
		return -EINVAL;
	if (kstrtou32(token, 0, &val32))
		return -EINVAL;
	tp_ctl.thr_a = (unsigned long)(val32);

	token = strsep(&sptr, " ");
	if (!token)
		return -EINVAL;
	if (kstrtou32(token, 0, &val32))
		return -EINVAL;
	tp_ctl.thr_b = (unsigned long)(val32);

	token = strsep(&sptr, " ");
	if (!token)
		return -EINVAL;
	if (kstrtou32(token, 0, &val32))
		return -EINVAL;
	tp_ctl.thr_c = (unsigned long)(val32);

	ath6kl_tp_cfg(ar, ar->tp_ctl.interval_s, tp_ctl.thr_type,
		      tp_ctl.thr_a, tp_ctl.thr_b, tp_ctl.thr_c);

	return len;
}

static ssize_t ath6kl_tp_track_read(struct file *file, char __user *user_buf,
				    size_t count, loff_t *ppos)
{
	struct ath6kl *ar = file->private_data;
	struct ath6kl_tp_ctl *tp_ctl = &ar->tp_ctl;
	char buf[200];
	unsigned int len = 0, buf_len = 0;
	ssize_t ret_cnt;

	buf_len = sizeof(buf)-1;
	len += scnprintf(buf + len, buf_len - len, "\n");

	len += scnprintf(buf + len, buf_len - len, "%d %ld %ld %ld\n",
			 tp_ctl->thr_type, tp_ctl->thr_a,
			 tp_ctl->thr_b, tp_ctl->thr_c);

	if (WARN_ON(len > buf_len))
		len = buf_len;
	ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);

	return ret_cnt;
}

static const struct file_operations fops_throughput_track = {
	.read = ath6kl_tp_track_read,
	.write = ath6kl_tp_track_write,
	.open = ath6kl_debugfs_open_pri,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath6kl_tp_current_read(struct file *file, char __user *user_buf,
				      size_t count, loff_t *ppos)
{
	struct ath6kl *ar = file->private_data;
	struct ath6kl_vif *vif, *tmp_vif;
	struct ath6kl_vif_tp_status *vif_tp_status;
	char buf[200];
	unsigned int len = 0, buf_len = 0;
	ssize_t ret_cnt;

	buf_len = sizeof(buf)-1;
	len += scnprintf(buf + len, buf_len - len, "\n");

	list_for_each_entry_safe(vif, tmp_vif, &ar->vif_list, list) {
		vif_tp_status = &vif->vif_tp_status;
		len += scnprintf(buf + len, buf_len - len, "%s %d %ld\n",
			vif->ndev->name, vif_tp_status->cur_level,
				vif_tp_status->cur_tp);
	}

	if (WARN_ON(len > buf_len))
		len = buf_len;
	ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);

	return ret_cnt;
}

static const struct file_operations fops_throughput_current = {
	.read = ath6kl_tp_current_read,
	.open = ath6kl_debugfs_open_pri,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath6kl_packet_filter_write(struct file *file,
					  const char __user *user_buf,
					  size_t count, loff_t *ppos)
{
	struct ath6kl *ar = file->private_data;
	struct ath6kl_vif *vif;
	char buf[512];
	ssize_t len;
	int ret;

	if (WARN_ON(!test_bit(WMI_READY, &ar->flag)))
		return -EIO;

	vif = ath6kl_vif_first(ar);

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len))
		return -EFAULT;
	buf[len] = '\0';

	ret = ath6kl_ioctl_pkt_filter_set(vif, buf, len);
	if (ret) {
		ath6kl_err("failed to set pkt filter:%d\n", ret);
		return ret;
	}

	return count;
}

static const struct file_operations fops_packet_filter = {
	.open = ath6kl_debugfs_open_pri,
	.write = ath6kl_packet_filter_write,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath6kl_hw_info_read(struct file *file, char __user *user_buf,
				      size_t count, loff_t *ppos)
{
	struct ath6kl *ar = file->private_data;
	char buf[48];
	int len;

	len = snprintf(buf, sizeof(buf), "hw_info: %s, 0x%x\n",
		       ar->hw.name, ar->version.target_ver);

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

static const struct file_operations fops_hw_info = {
	.open = ath6kl_debugfs_open_pri,
	.read = ath6kl_hw_info_read,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

int ath6kl_init_debugfs_pri(struct ath6kl *ar)
{
	debugfs_create_file("inactivity_period", S_IWUSR, ar->debugfs_phy, ar,
			    &fops_inact_period);

	debugfs_create_file("bmiss_time", S_IRUSR | S_IWUSR, ar->debugfs_phy,
			    ar, &fops_bmisstime);

	debugfs_create_file("max_num_sta", S_IWUSR, ar->debugfs_phy,
			    ar, &fops_max_num_sta);

	debugfs_create_file("throughput_track", S_IRUSR | S_IWUSR,
			    ar->debugfs_phy, ar, &fops_throughput_track);

	debugfs_create_file("throughput_current", S_IRUSR,
			    ar->debugfs_phy, ar, &fops_throughput_current);

	debugfs_create_file("packet_filter", S_IWUSR, ar->debugfs_phy, ar,
			    &fops_packet_filter);

	debugfs_create_file("hw_info", S_IRUSR, ar->debugfs_phy, ar,
			    &fops_hw_info);

	return 0;
}

#else

int ath6kl_wmi_error_report_event(struct wmi *wmi, u8 *data, int len)
{
	return 0;
}

#endif