/*
 * Copyright (c) 2010-2011 Atheros Communications 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 "htc.h"

static ssize_t read_file_tgt_int_stats(struct file *file, char __user *user_buf,
				       size_t count, loff_t *ppos)
{
	struct ath9k_htc_priv *priv = file->private_data;
	struct ath9k_htc_target_int_stats cmd_rsp;
	char buf[512];
	unsigned int len = 0;
	int ret = 0;

	memset(&cmd_rsp, 0, sizeof(cmd_rsp));

	ath9k_htc_ps_wakeup(priv);

	WMI_CMD(WMI_INT_STATS_CMDID);
	if (ret) {
		ath9k_htc_ps_restore(priv);
		return -EINVAL;
	}

	ath9k_htc_ps_restore(priv);

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "RX",
			 be32_to_cpu(cmd_rsp.rx));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "RXORN",
			 be32_to_cpu(cmd_rsp.rxorn));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "RXEOL",
			 be32_to_cpu(cmd_rsp.rxeol));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "TXURN",
			 be32_to_cpu(cmd_rsp.txurn));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "TXTO",
			 be32_to_cpu(cmd_rsp.txto));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "CST",
			 be32_to_cpu(cmd_rsp.cst));

	if (len > sizeof(buf))
		len = sizeof(buf);

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

static const struct file_operations fops_tgt_int_stats = {
	.read = read_file_tgt_int_stats,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t read_file_tgt_tx_stats(struct file *file, char __user *user_buf,
				      size_t count, loff_t *ppos)
{
	struct ath9k_htc_priv *priv = file->private_data;
	struct ath9k_htc_target_tx_stats cmd_rsp;
	char buf[512];
	unsigned int len = 0;
	int ret = 0;

	memset(&cmd_rsp, 0, sizeof(cmd_rsp));

	ath9k_htc_ps_wakeup(priv);

	WMI_CMD(WMI_TX_STATS_CMDID);
	if (ret) {
		ath9k_htc_ps_restore(priv);
		return -EINVAL;
	}

	ath9k_htc_ps_restore(priv);

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "Xretries",
			 be32_to_cpu(cmd_rsp.xretries));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "FifoErr",
			 be32_to_cpu(cmd_rsp.fifoerr));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "Filtered",
			 be32_to_cpu(cmd_rsp.filtered));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "TimerExp",
			 be32_to_cpu(cmd_rsp.timer_exp));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "ShortRetries",
			 be32_to_cpu(cmd_rsp.shortretries));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "LongRetries",
			 be32_to_cpu(cmd_rsp.longretries));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "QueueNull",
			 be32_to_cpu(cmd_rsp.qnull));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "EncapFail",
			 be32_to_cpu(cmd_rsp.encap_fail));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "NoBuf",
			 be32_to_cpu(cmd_rsp.nobuf));

	if (len > sizeof(buf))
		len = sizeof(buf);

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

static const struct file_operations fops_tgt_tx_stats = {
	.read = read_file_tgt_tx_stats,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t read_file_tgt_rx_stats(struct file *file, char __user *user_buf,
				      size_t count, loff_t *ppos)
{
	struct ath9k_htc_priv *priv = file->private_data;
	struct ath9k_htc_target_rx_stats cmd_rsp;
	char buf[512];
	unsigned int len = 0;
	int ret = 0;

	memset(&cmd_rsp, 0, sizeof(cmd_rsp));

	ath9k_htc_ps_wakeup(priv);

	WMI_CMD(WMI_RX_STATS_CMDID);
	if (ret) {
		ath9k_htc_ps_restore(priv);
		return -EINVAL;
	}

	ath9k_htc_ps_restore(priv);

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "NoBuf",
			 be32_to_cpu(cmd_rsp.nobuf));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "HostSend",
			 be32_to_cpu(cmd_rsp.host_send));

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "HostDone",
			 be32_to_cpu(cmd_rsp.host_done));

	if (len > sizeof(buf))
		len = sizeof(buf);

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

static const struct file_operations fops_tgt_rx_stats = {
	.read = read_file_tgt_rx_stats,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t read_file_xmit(struct file *file, char __user *user_buf,
			      size_t count, loff_t *ppos)
{
	struct ath9k_htc_priv *priv = file->private_data;
	char buf[512];
	unsigned int len = 0;

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "Buffers queued",
			 priv->debug.tx_stats.buf_queued);
	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "Buffers completed",
			 priv->debug.tx_stats.buf_completed);
	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "SKBs queued",
			 priv->debug.tx_stats.skb_queued);
	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "SKBs success",
			 priv->debug.tx_stats.skb_success);
	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "SKBs failed",
			 priv->debug.tx_stats.skb_failed);
	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "CAB queued",
			 priv->debug.tx_stats.cab_queued);

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "BE queued",
			 priv->debug.tx_stats.queue_stats[IEEE80211_AC_BE]);
	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "BK queued",
			 priv->debug.tx_stats.queue_stats[IEEE80211_AC_BK]);
	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "VI queued",
			 priv->debug.tx_stats.queue_stats[IEEE80211_AC_VI]);
	len += scnprintf(buf + len, sizeof(buf) - len,
			 "%20s : %10u\n", "VO queued",
			 priv->debug.tx_stats.queue_stats[IEEE80211_AC_VO]);

	if (len > sizeof(buf))
		len = sizeof(buf);

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

static const struct file_operations fops_xmit = {
	.read = read_file_xmit,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

void ath9k_htc_err_stat_rx(struct ath9k_htc_priv *priv,
			     struct ath_rx_status *rs)
{
	ath9k_cmn_debug_stat_rx(&priv->debug.rx_stats, rs);
}

static ssize_t read_file_skb_rx(struct file *file, char __user *user_buf,
			      size_t count, loff_t *ppos)
{
	struct ath9k_htc_priv *priv = file->private_data;
	char *buf;
	unsigned int len = 0, size = 1500;
	ssize_t retval = 0;

	buf = kzalloc(size, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

	len += scnprintf(buf + len, size - len,
			 "%20s : %10u\n", "SKBs allocated",
			 priv->debug.skbrx_stats.skb_allocated);
	len += scnprintf(buf + len, size - len,
			 "%20s : %10u\n", "SKBs completed",
			 priv->debug.skbrx_stats.skb_completed);
	len += scnprintf(buf + len, size - len,
			 "%20s : %10u\n", "SKBs Dropped",
			 priv->debug.skbrx_stats.skb_dropped);

	if (len > size)
		len = size;

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

	return retval;
}

static const struct file_operations fops_skb_rx = {
	.read = read_file_skb_rx,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t read_file_slot(struct file *file, char __user *user_buf,
			      size_t count, loff_t *ppos)
{
	struct ath9k_htc_priv *priv = file->private_data;
	char buf[512];
	unsigned int len = 0;

	spin_lock_bh(&priv->tx.tx_lock);

	len += scnprintf(buf + len, sizeof(buf) - len, "TX slot bitmap : ");

	len += bitmap_scnprintf(buf + len, sizeof(buf) - len,
			       priv->tx.tx_slot, MAX_TX_BUF_NUM);

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

	len += scnprintf(buf + len, sizeof(buf) - len,
			 "Used slots     : %d\n",
			 bitmap_weight(priv->tx.tx_slot, MAX_TX_BUF_NUM));

	spin_unlock_bh(&priv->tx.tx_lock);

	if (len > sizeof(buf))
		len = sizeof(buf);

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

static const struct file_operations fops_slot = {
	.read = read_file_slot,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t read_file_queue(struct file *file, char __user *user_buf,
			       size_t count, loff_t *ppos)
{
	struct ath9k_htc_priv *priv = file->private_data;
	char buf[512];
	unsigned int len = 0;

	len += scnprintf(buf + len, sizeof(buf) - len, "%20s : %10u\n",
			 "Mgmt endpoint", skb_queue_len(&priv->tx.mgmt_ep_queue));

	len += scnprintf(buf + len, sizeof(buf) - len, "%20s : %10u\n",
			 "Cab endpoint", skb_queue_len(&priv->tx.cab_ep_queue));

	len += scnprintf(buf + len, sizeof(buf) - len, "%20s : %10u\n",
			 "Data BE endpoint", skb_queue_len(&priv->tx.data_be_queue));

	len += scnprintf(buf + len, sizeof(buf) - len, "%20s : %10u\n",
			 "Data BK endpoint", skb_queue_len(&priv->tx.data_bk_queue));

	len += scnprintf(buf + len, sizeof(buf) - len, "%20s : %10u\n",
			 "Data VI endpoint", skb_queue_len(&priv->tx.data_vi_queue));

	len += scnprintf(buf + len, sizeof(buf) - len, "%20s : %10u\n",
			 "Data VO endpoint", skb_queue_len(&priv->tx.data_vo_queue));

	len += scnprintf(buf + len, sizeof(buf) - len, "%20s : %10u\n",
			 "Failed queue", skb_queue_len(&priv->tx.tx_failed));

	spin_lock_bh(&priv->tx.tx_lock);
	len += scnprintf(buf + len, sizeof(buf) - len, "%20s : %10u\n",
			 "Queued count", priv->tx.queued_cnt);
	spin_unlock_bh(&priv->tx.tx_lock);

	if (len > sizeof(buf))
		len = sizeof(buf);

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

}

static const struct file_operations fops_queue = {
	.read = read_file_queue,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t read_file_debug(struct file *file, char __user *user_buf,
			       size_t count, loff_t *ppos)
{
	struct ath9k_htc_priv *priv = file->private_data;
	struct ath_common *common = ath9k_hw_common(priv->ah);
	char buf[32];
	unsigned int len;

	len = sprintf(buf, "0x%08x\n", common->debug_mask);
	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_debug(struct file *file, const char __user *user_buf,
				size_t count, loff_t *ppos)
{
	struct ath9k_htc_priv *priv = file->private_data;
	struct ath_common *common = ath9k_hw_common(priv->ah);
	unsigned long mask;
	char buf[32];
	ssize_t len;

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

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

	common->debug_mask = mask;
	return count;
}

static const struct file_operations fops_debug = {
	.read = read_file_debug,
	.write = write_file_debug,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

/* Ethtool support for get-stats */
#define AMKSTR(nm) #nm "_BE", #nm "_BK", #nm "_VI", #nm "_VO"
static const char ath9k_htc_gstrings_stats[][ETH_GSTRING_LEN] = {
	"tx_pkts_nic",
	"tx_bytes_nic",
	"rx_pkts_nic",
	"rx_bytes_nic",

	AMKSTR(d_tx_pkts),

	"d_rx_crc_err",
	"d_rx_decrypt_crc_err",
	"d_rx_phy_err",
	"d_rx_mic_err",
	"d_rx_pre_delim_crc_err",
	"d_rx_post_delim_crc_err",
	"d_rx_decrypt_busy_err",

	"d_rx_phyerr_radar",
	"d_rx_phyerr_ofdm_timing",
	"d_rx_phyerr_cck_timing",

};
#define ATH9K_HTC_SSTATS_LEN ARRAY_SIZE(ath9k_htc_gstrings_stats)

void ath9k_htc_get_et_strings(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif,
			      u32 sset, u8 *data)
{
	if (sset == ETH_SS_STATS)
		memcpy(data, *ath9k_htc_gstrings_stats,
		       sizeof(ath9k_htc_gstrings_stats));
}

int ath9k_htc_get_et_sset_count(struct ieee80211_hw *hw,
				struct ieee80211_vif *vif, int sset)
{
	if (sset == ETH_SS_STATS)
		return ATH9K_HTC_SSTATS_LEN;
	return 0;
}

#define STXBASE priv->debug.tx_stats
#define SRXBASE priv->debug.rx_stats
#define SKBTXBASE priv->debug.tx_stats
#define SKBRXBASE priv->debug.skbrx_stats
#define ASTXQ(a)					\
	data[i++] = STXBASE.a[IEEE80211_AC_BE];		\
	data[i++] = STXBASE.a[IEEE80211_AC_BK];		\
	data[i++] = STXBASE.a[IEEE80211_AC_VI];		\
	data[i++] = STXBASE.a[IEEE80211_AC_VO]

void ath9k_htc_get_et_stats(struct ieee80211_hw *hw,
			    struct ieee80211_vif *vif,
			    struct ethtool_stats *stats, u64 *data)
{
	struct ath9k_htc_priv *priv = hw->priv;
	int i = 0;

	data[i++] = SKBTXBASE.skb_success;
	data[i++] = SKBTXBASE.skb_success_bytes;
	data[i++] = SKBRXBASE.skb_completed;
	data[i++] = SKBRXBASE.skb_completed_bytes;

	ASTXQ(queue_stats);

	data[i++] = SRXBASE.crc_err;
	data[i++] = SRXBASE.decrypt_crc_err;
	data[i++] = SRXBASE.phy_err;
	data[i++] = SRXBASE.mic_err;
	data[i++] = SRXBASE.pre_delim_crc_err;
	data[i++] = SRXBASE.post_delim_crc_err;
	data[i++] = SRXBASE.decrypt_busy_err;

	data[i++] = SRXBASE.phy_err_stats[ATH9K_PHYERR_RADAR];
	data[i++] = SRXBASE.phy_err_stats[ATH9K_PHYERR_OFDM_TIMING];
	data[i++] = SRXBASE.phy_err_stats[ATH9K_PHYERR_CCK_TIMING];

	WARN_ON(i != ATH9K_HTC_SSTATS_LEN);
}

void ath9k_htc_deinit_debug(struct ath9k_htc_priv *priv)
{
	ath9k_cmn_spectral_deinit_debug(&priv->spec_priv);
}

int ath9k_htc_init_debug(struct ath_hw *ah)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) common->priv;

	priv->debug.debugfs_phy = debugfs_create_dir(KBUILD_MODNAME,
					     priv->hw->wiphy->debugfsdir);
	if (!priv->debug.debugfs_phy)
		return -ENOMEM;

	ath9k_cmn_spectral_init_debug(&priv->spec_priv, priv->debug.debugfs_phy);

	debugfs_create_file("tgt_int_stats", S_IRUSR, priv->debug.debugfs_phy,
			    priv, &fops_tgt_int_stats);
	debugfs_create_file("tgt_tx_stats", S_IRUSR, priv->debug.debugfs_phy,
			    priv, &fops_tgt_tx_stats);
	debugfs_create_file("tgt_rx_stats", S_IRUSR, priv->debug.debugfs_phy,
			    priv, &fops_tgt_rx_stats);
	debugfs_create_file("xmit", S_IRUSR, priv->debug.debugfs_phy,
			    priv, &fops_xmit);
	debugfs_create_file("skb_rx", S_IRUSR, priv->debug.debugfs_phy,
			    priv, &fops_skb_rx);

	ath9k_cmn_debug_recv(priv->debug.debugfs_phy, &priv->debug.rx_stats);
	ath9k_cmn_debug_phy_err(priv->debug.debugfs_phy, &priv->debug.rx_stats);

	debugfs_create_file("slot", S_IRUSR, priv->debug.debugfs_phy,
			    priv, &fops_slot);
	debugfs_create_file("queue", S_IRUSR, priv->debug.debugfs_phy,
			    priv, &fops_queue);
	debugfs_create_file("debug", S_IRUSR | S_IWUSR, priv->debug.debugfs_phy,
			    priv, &fops_debug);

	ath9k_cmn_debug_base_eeprom(priv->debug.debugfs_phy, priv->ah);
	ath9k_cmn_debug_modal_eeprom(priv->debug.debugfs_phy, priv->ah);

	return 0;
}