/*
 * Copyright (c) 2004-2011 Atheros Communications Inc.
 * Copyright (c) 2011-2012 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 "core.h"

#include <linux/skbuff.h>
#include <linux/fs.h>
#include <linux/hex.h>
#include <linux/vmalloc.h>
#include <linux/export.h>

#include "debug.h"
#include "target.h"

struct ath6kl_fwlog_slot {
        __le32 timestamp;
        __le32 length;

        /* max ATH6KL_FWLOG_PAYLOAD_SIZE bytes */
        u8 payload[];
};

#define ATH6KL_FWLOG_MAX_ENTRIES 20

#define ATH6KL_FWLOG_VALID_MASK 0x1ffff

void ath6kl_printk(const char *level, const char *fmt, ...)
{
        struct va_format vaf;
        va_list args;

        va_start(args, fmt);

        vaf.fmt = fmt;
        vaf.va = &args;

        printk("%sath6kl: %pV", level, &vaf);

        va_end(args);
}
EXPORT_SYMBOL(ath6kl_printk);

void ath6kl_info(const char *fmt, ...)
{
        struct va_format vaf = {
                .fmt = fmt,
        };
        va_list args;

        va_start(args, fmt);
        vaf.va = &args;
        ath6kl_printk(KERN_INFO, "%pV", &vaf);
        trace_ath6kl_log_info(&vaf);
        va_end(args);
}
EXPORT_SYMBOL(ath6kl_info);

void ath6kl_err(const char *fmt, ...)
{
        struct va_format vaf = {
                .fmt = fmt,
        };
        va_list args;

        va_start(args, fmt);
        vaf.va = &args;
        ath6kl_printk(KERN_ERR, "%pV", &vaf);
        trace_ath6kl_log_err(&vaf);
        va_end(args);
}
EXPORT_SYMBOL(ath6kl_err);

void ath6kl_warn(const char *fmt, ...)
{
        struct va_format vaf = {
                .fmt = fmt,
        };
        va_list args;

        va_start(args, fmt);
        vaf.va = &args;
        ath6kl_printk(KERN_WARNING, "%pV", &vaf);
        trace_ath6kl_log_warn(&vaf);
        va_end(args);
}
EXPORT_SYMBOL(ath6kl_warn);

int ath6kl_read_tgt_stats(struct ath6kl *ar, struct ath6kl_vif *vif)
{
        long left;

        if (down_interruptible(&ar->sem))
                return -EBUSY;

        set_bit(STATS_UPDATE_PEND, &vif->flags);

        if (ath6kl_wmi_get_stats_cmd(ar->wmi, 0)) {
                up(&ar->sem);
                return -EIO;
        }

        left = wait_event_interruptible_timeout(ar->event_wq,
                                                !test_bit(STATS_UPDATE_PEND,
                                                &vif->flags), WMI_TIMEOUT);

        up(&ar->sem);

        if (left <= 0)
                return -ETIMEDOUT;

        return 0;
}
EXPORT_SYMBOL(ath6kl_read_tgt_stats);

#ifdef CONFIG_ATH6KL_DEBUG

void ath6kl_dbg(enum ATH6K_DEBUG_MASK mask, const char *fmt, ...)
{
        struct va_format vaf;
        va_list args;

        va_start(args, fmt);

        vaf.fmt = fmt;
        vaf.va = &args;

        if (debug_mask & mask)
                ath6kl_printk(KERN_DEBUG, "%pV", &vaf);

        trace_ath6kl_log_dbg(mask, &vaf);

        va_end(args);
}
EXPORT_SYMBOL(ath6kl_dbg);

void ath6kl_dbg_dump(enum ATH6K_DEBUG_MASK mask,
                     const char *msg, const char *prefix,
                     const void *buf, size_t len)
{
        if (debug_mask & mask) {
                if (msg)
                        ath6kl_dbg(mask, "%s\n", msg);

                print_hex_dump_bytes(prefix, DUMP_PREFIX_OFFSET, buf, len);
        }

        /* tracing code doesn't like null strings :/ */
        trace_ath6kl_log_dbg_dump(msg ? msg : "", prefix ? prefix : "",
                                  buf, len);
}
EXPORT_SYMBOL(ath6kl_dbg_dump);

#define REG_OUTPUT_LEN_PER_LINE 25
#define REGTYPE_STR_LEN         100

struct ath6kl_diag_reg_info {
        u32 reg_start;
        u32 reg_end;
        const char *reg_info;
};

static const struct ath6kl_diag_reg_info diag_reg[] = {
        { 0x20000, 0x200fc, "General DMA and Rx registers" },
        { 0x28000, 0x28900, "MAC PCU register & keycache" },
        { 0x20800, 0x20a40, "QCU" },
        { 0x21000, 0x212f0, "DCU" },
        { 0x4000,  0x42e4, "RTC" },
        { 0x540000, 0x540000 + (256 * 1024), "RAM" },
        { 0x29800, 0x2B210, "Base Band" },
        { 0x1C000, 0x1C748, "Analog" },
};

void ath6kl_dump_registers(struct ath6kl_device *dev,
                           struct ath6kl_irq_proc_registers *irq_proc_reg,
                           struct ath6kl_irq_enable_reg *irq_enable_reg)
{
        ath6kl_dbg(ATH6KL_DBG_IRQ, ("<------- Register Table -------->\n"));

        if (irq_proc_reg != NULL) {
                ath6kl_dbg(ATH6KL_DBG_IRQ,
                           "Host Int status:           0x%x\n",
                           irq_proc_reg->host_int_status);
                ath6kl_dbg(ATH6KL_DBG_IRQ,
                           "CPU Int status:            0x%x\n",
                           irq_proc_reg->cpu_int_status);
                ath6kl_dbg(ATH6KL_DBG_IRQ,
                           "Error Int status:          0x%x\n",
                           irq_proc_reg->error_int_status);
                ath6kl_dbg(ATH6KL_DBG_IRQ,
                           "Counter Int status:        0x%x\n",
                           irq_proc_reg->counter_int_status);
                ath6kl_dbg(ATH6KL_DBG_IRQ,
                           "Mbox Frame:                0x%x\n",
                           irq_proc_reg->mbox_frame);
                ath6kl_dbg(ATH6KL_DBG_IRQ,
                           "Rx Lookahead Valid:        0x%x\n",
                           irq_proc_reg->rx_lkahd_valid);
                ath6kl_dbg(ATH6KL_DBG_IRQ,
                           "Rx Lookahead 0:            0x%x\n",
                           irq_proc_reg->rx_lkahd[0]);
                ath6kl_dbg(ATH6KL_DBG_IRQ,
                           "Rx Lookahead 1:            0x%x\n",
                           irq_proc_reg->rx_lkahd[1]);

                if (dev->ar->mbox_info.gmbox_addr != 0) {
                        /*
                         * If the target supports GMBOX hardware, dump some
                         * additional state.
                         */
                        ath6kl_dbg(ATH6KL_DBG_IRQ,
                                   "GMBOX Host Int status 2:   0x%x\n",
                                   irq_proc_reg->host_int_status2);
                        ath6kl_dbg(ATH6KL_DBG_IRQ,
                                   "GMBOX RX Avail:            0x%x\n",
                                   irq_proc_reg->gmbox_rx_avail);
                        ath6kl_dbg(ATH6KL_DBG_IRQ,
                                   "GMBOX lookahead alias 0:   0x%x\n",
                                   irq_proc_reg->rx_gmbox_lkahd_alias[0]);
                        ath6kl_dbg(ATH6KL_DBG_IRQ,
                                   "GMBOX lookahead alias 1:   0x%x\n",
                                   irq_proc_reg->rx_gmbox_lkahd_alias[1]);
                }
        }

        if (irq_enable_reg != NULL) {
                ath6kl_dbg(ATH6KL_DBG_IRQ,
                           "Int status Enable:         0x%x\n",
                           irq_enable_reg->int_status_en);
                ath6kl_dbg(ATH6KL_DBG_IRQ, "Counter Int status Enable: 0x%x\n",
                           irq_enable_reg->cntr_int_status_en);
        }
        ath6kl_dbg(ATH6KL_DBG_IRQ, "<------------------------------->\n");
}

static void dump_cred_dist(struct htc_endpoint_credit_dist *ep_dist)
{
        ath6kl_dbg(ATH6KL_DBG_CREDIT,
                   "--- endpoint: %d  svc_id: 0x%X ---\n",
                   ep_dist->endpoint, ep_dist->svc_id);
        ath6kl_dbg(ATH6KL_DBG_CREDIT, " dist_flags     : 0x%X\n",
                   ep_dist->dist_flags);
        ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_norm      : %d\n",
                   ep_dist->cred_norm);
        ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_min       : %d\n",
                   ep_dist->cred_min);
        ath6kl_dbg(ATH6KL_DBG_CREDIT, " credits        : %d\n",
                   ep_dist->credits);
        ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_assngd    : %d\n",
                   ep_dist->cred_assngd);
        ath6kl_dbg(ATH6KL_DBG_CREDIT, " seek_cred      : %d\n",
                   ep_dist->seek_cred);
        ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_sz        : %d\n",
                   ep_dist->cred_sz);
        ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_per_msg   : %d\n",
                   ep_dist->cred_per_msg);
        ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_to_dist   : %d\n",
                   ep_dist->cred_to_dist);
        ath6kl_dbg(ATH6KL_DBG_CREDIT, " txq_depth      : %d\n",
                   get_queue_depth(&ep_dist->htc_ep->txq));
        ath6kl_dbg(ATH6KL_DBG_CREDIT,
                   "----------------------------------\n");
}

/* FIXME: move to htc.c */
void dump_cred_dist_stats(struct htc_target *target)
{
        struct htc_endpoint_credit_dist *ep_list;

        list_for_each_entry(ep_list, &target->cred_dist_list, list)
                dump_cred_dist(ep_list);

        ath6kl_dbg(ATH6KL_DBG_CREDIT,
                   "credit distribution total %d free %d\n",
                   target->credit_info->total_avail_credits,
                   target->credit_info->cur_free_credits);
}

void ath6kl_debug_war(struct ath6kl *ar, enum ath6kl_war war)
{
        switch (war) {
        case ATH6KL_WAR_INVALID_RATE:
                ar->debug.war_stats.invalid_rate++;
                break;
        }
}

static ssize_t read_file_war_stats(struct file *file, char __user *user_buf,
                                   size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        char *buf;
        unsigned int len = 0, buf_len = 1500;
        ssize_t ret_cnt;

        buf = kzalloc(buf_len, GFP_KERNEL);
        if (!buf)
                return -ENOMEM;

        len += scnprintf(buf + len, buf_len - len, "\n");
        len += scnprintf(buf + len, buf_len - len, "%25s\n",
                         "Workaround stats");
        len += scnprintf(buf + len, buf_len - len, "%25s\n\n",
                         "=================");
        len += scnprintf(buf + len, buf_len - len, "%20s %10u\n",
                         "Invalid rates", ar->debug.war_stats.invalid_rate);

        if (WARN_ON(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_war_stats = {
        .read = read_file_war_stats,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

void ath6kl_debug_fwlog_event(struct ath6kl *ar, const void *buf, size_t len)
{
        struct ath6kl_fwlog_slot *slot;
        struct sk_buff *skb;
        size_t slot_len;

        if (WARN_ON(len > ATH6KL_FWLOG_PAYLOAD_SIZE))
                return;

        slot_len = sizeof(*slot) + ATH6KL_FWLOG_PAYLOAD_SIZE;

        skb = alloc_skb(slot_len, GFP_KERNEL);
        if (!skb)
                return;

        slot = skb_put(skb, slot_len);
        slot->timestamp = cpu_to_le32(jiffies);
        slot->length = cpu_to_le32(len);
        memcpy(slot->payload, buf, len);

        /* Need to pad each record to fixed length ATH6KL_FWLOG_PAYLOAD_SIZE */
        memset(slot->payload + len, 0, ATH6KL_FWLOG_PAYLOAD_SIZE - len);

        spin_lock(&ar->debug.fwlog_queue.lock);

        __skb_queue_tail(&ar->debug.fwlog_queue, skb);
        complete(&ar->debug.fwlog_completion);

        /* drop oldest entries */
        while (skb_queue_len(&ar->debug.fwlog_queue) >
               ATH6KL_FWLOG_MAX_ENTRIES) {
                skb = __skb_dequeue(&ar->debug.fwlog_queue);
                kfree_skb(skb);
        }

        spin_unlock(&ar->debug.fwlog_queue.lock);

        return;
}

static int ath6kl_fwlog_open(struct inode *inode, struct file *file)
{
        struct ath6kl *ar = inode->i_private;

        if (ar->debug.fwlog_open)
                return -EBUSY;

        ar->debug.fwlog_open = true;

        file->private_data = inode->i_private;
        return 0;
}

static int ath6kl_fwlog_release(struct inode *inode, struct file *file)
{
        struct ath6kl *ar = inode->i_private;

        ar->debug.fwlog_open = false;

        return 0;
}

static ssize_t ath6kl_fwlog_read(struct file *file, char __user *user_buf,
                                 size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        struct sk_buff *skb;
        ssize_t ret_cnt;
        size_t len = 0;
        char *buf;

        buf = vmalloc(count);
        if (!buf)
                return -ENOMEM;

        /* read undelivered logs from firmware */
        ath6kl_read_fwlogs(ar);

        spin_lock(&ar->debug.fwlog_queue.lock);

        while ((skb = __skb_dequeue(&ar->debug.fwlog_queue))) {
                if (skb->len > count - len) {
                        /* not enough space, put skb back and leave */
                        __skb_queue_head(&ar->debug.fwlog_queue, skb);
                        break;
                }


                memcpy(buf + len, skb->data, skb->len);
                len += skb->len;

                kfree_skb(skb);
        }

        spin_unlock(&ar->debug.fwlog_queue.lock);

        /* FIXME: what to do if len == 0? */

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

        vfree(buf);

        return ret_cnt;
}

static const struct file_operations fops_fwlog = {
        .open = ath6kl_fwlog_open,
        .release = ath6kl_fwlog_release,
        .read = ath6kl_fwlog_read,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_fwlog_block_read(struct file *file,
                                       char __user *user_buf,
                                       size_t count,
                                       loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        struct sk_buff *skb;
        ssize_t ret_cnt;
        size_t len = 0, not_copied;
        char *buf;
        int ret;

        buf = vmalloc(count);
        if (!buf)
                return -ENOMEM;

        spin_lock(&ar->debug.fwlog_queue.lock);

        if (skb_queue_len(&ar->debug.fwlog_queue) == 0) {
                /* we must init under queue lock */
                init_completion(&ar->debug.fwlog_completion);

                spin_unlock(&ar->debug.fwlog_queue.lock);

                ret = wait_for_completion_interruptible(
                        &ar->debug.fwlog_completion);
                if (ret == -ERESTARTSYS) {
                        vfree(buf);
                        return ret;
                }

                spin_lock(&ar->debug.fwlog_queue.lock);
        }

        while ((skb = __skb_dequeue(&ar->debug.fwlog_queue))) {
                if (skb->len > count - len) {
                        /* not enough space, put skb back and leave */
                        __skb_queue_head(&ar->debug.fwlog_queue, skb);
                        break;
                }


                memcpy(buf + len, skb->data, skb->len);
                len += skb->len;

                kfree_skb(skb);
        }

        spin_unlock(&ar->debug.fwlog_queue.lock);

        /* FIXME: what to do if len == 0? */

        not_copied = copy_to_user(user_buf, buf, len);
        if (not_copied != 0) {
                ret_cnt = -EFAULT;
                goto out;
        }

        *ppos = *ppos + len;

        ret_cnt = len;

out:
        vfree(buf);

        return ret_cnt;
}

static const struct file_operations fops_fwlog_block = {
        .open = ath6kl_fwlog_open,
        .release = ath6kl_fwlog_release,
        .read = ath6kl_fwlog_block_read,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_fwlog_mask_read(struct file *file, char __user *user_buf,
                                      size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        char buf[16];
        int len;

        len = snprintf(buf, sizeof(buf), "0x%x\n", ar->debug.fwlog_mask);

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

static ssize_t ath6kl_fwlog_mask_write(struct file *file,
                                       const char __user *user_buf,
                                       size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        int ret;

        ret = kstrtou32_from_user(user_buf, count, 0, &ar->debug.fwlog_mask);
        if (ret)
                return ret;

        ret = ath6kl_wmi_config_debug_module_cmd(ar->wmi,
                                                 ATH6KL_FWLOG_VALID_MASK,
                                                 ar->debug.fwlog_mask);
        if (ret)
                return ret;

        return count;
}

static const struct file_operations fops_fwlog_mask = {
        .open = simple_open,
        .read = ath6kl_fwlog_mask_read,
        .write = ath6kl_fwlog_mask_write,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t read_file_tgt_stats(struct file *file, char __user *user_buf,
                                   size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        struct ath6kl_vif *vif;
        struct target_stats *tgt_stats;
        char *buf;
        unsigned int len = 0, buf_len = 1500;
        int i;
        ssize_t ret_cnt;
        int rv;

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

        buf = kzalloc(buf_len, GFP_KERNEL);
        if (!buf)
                return -ENOMEM;

        rv = ath6kl_read_tgt_stats(ar, vif);
        if (rv < 0) {
                kfree(buf);
                return rv;
        }

        tgt_stats = &vif->target_stats;

        len += scnprintf(buf + len, buf_len - len, "\n");
        len += scnprintf(buf + len, buf_len - len, "%25s\n",
                         "Target Tx stats");
        len += scnprintf(buf + len, buf_len - len, "%25s\n\n",
                         "=================");
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Ucast packets", tgt_stats->tx_ucast_pkt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Bcast packets", tgt_stats->tx_bcast_pkt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Ucast byte", tgt_stats->tx_ucast_byte);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Bcast byte", tgt_stats->tx_bcast_byte);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Rts success cnt", tgt_stats->tx_rts_success_cnt);
        for (i = 0; i < 4; i++)
                len += scnprintf(buf + len, buf_len - len,
                                 "%18s %d %10llu\n", "PER on ac",
                                 i, tgt_stats->tx_pkt_per_ac[i]);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Error", tgt_stats->tx_err);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Fail count", tgt_stats->tx_fail_cnt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Retry count", tgt_stats->tx_retry_cnt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Multi retry cnt", tgt_stats->tx_mult_retry_cnt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Rts fail cnt", tgt_stats->tx_rts_fail_cnt);
        len += scnprintf(buf + len, buf_len - len, "%25s %10llu\n\n",
                         "TKIP counter measure used",
                         tgt_stats->tkip_cnter_measures_invoked);

        len += scnprintf(buf + len, buf_len - len, "%25s\n",
                         "Target Rx stats");
        len += scnprintf(buf + len, buf_len - len, "%25s\n",
                         "=================");

        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Ucast packets", tgt_stats->rx_ucast_pkt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
                         "Ucast Rate", tgt_stats->rx_ucast_rate);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Bcast packets", tgt_stats->rx_bcast_pkt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Ucast byte", tgt_stats->rx_ucast_byte);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Bcast byte", tgt_stats->rx_bcast_byte);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Fragmented pkt", tgt_stats->rx_frgment_pkt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Error", tgt_stats->rx_err);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "CRC Err", tgt_stats->rx_crc_err);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Key cache miss", tgt_stats->rx_key_cache_miss);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Decrypt Err", tgt_stats->rx_decrypt_err);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Duplicate frame", tgt_stats->rx_dupl_frame);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Tkip Mic failure", tgt_stats->tkip_local_mic_fail);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "TKIP format err", tgt_stats->tkip_fmt_err);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "CCMP format Err", tgt_stats->ccmp_fmt_err);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n\n",
                         "CCMP Replay Err", tgt_stats->ccmp_replays);

        len += scnprintf(buf + len, buf_len - len, "%25s\n",
                         "Misc Target stats");
        len += scnprintf(buf + len, buf_len - len, "%25s\n",
                         "=================");
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Beacon Miss count", tgt_stats->cs_bmiss_cnt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Num Connects", tgt_stats->cs_connect_cnt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
                         "Num disconnects", tgt_stats->cs_discon_cnt);
        len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
                         "Beacon avg rssi", tgt_stats->cs_ave_beacon_rssi);
        len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
                         "ARP pkt received", tgt_stats->arp_received);
        len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
                         "ARP pkt matched", tgt_stats->arp_matched);
        len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
                         "ARP pkt replied", tgt_stats->arp_replied);

        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_tgt_stats = {
        .read = read_file_tgt_stats,
        .open = simple_open,
        .owner = THIS_MODULE,
        .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->credit_info->total_avail_credits);
        len += scnprintf(buf + len, buf_len - len, "%25s%5d\n",
                         "Free credits :",
                         target->credit_info->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(&ep_list->htc_ep->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 = simple_open,
        .owner = THIS_MODULE,
        .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 = sizeof(struct htc_endpoint_stats) / sizeof(u32) *
                (25 + ENDPOINT_MAX * 11);
        buf = kmalloc(buf_len, GFP_KERNEL);
        if (!buf)
                return -ENOMEM;

#define EPSTAT(name)                                                    \
        do {                                                            \
                len = print_endpoint_stat(target, buf, buf_len, len,    \
                                          offsetof(struct htc_endpoint_stats, \
                                                   name),               \
                                          #name);                       \
        } while (0)

        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_from_other);
        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 = simple_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;
        unsigned long n_reg = 0;

        for (i = 0; i < ARRAY_SIZE(diag_reg); i++)
                n_reg = n_reg +
                     (diag_reg[i].reg_end - diag_reg[i].reg_start) / 4 + 1;

        return n_reg;
}

static bool ath6kl_dbg_is_diag_reg_valid(u32 reg_addr)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(diag_reg); i++) {
                if (reg_addr >= diag_reg[i].reg_start &&
                    reg_addr <= diag_reg[i].reg_end)
                        return true;
        }

        return false;
}

static ssize_t ath6kl_regread_read(struct file *file, char __user *user_buf,
                                    size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        u8 buf[50];
        unsigned int len = 0;

        if (ar->debug.dbgfs_diag_reg)
                len += scnprintf(buf + len, sizeof(buf) - len, "0x%x\n",
                                ar->debug.dbgfs_diag_reg);
        else
                len += scnprintf(buf + len, sizeof(buf) - len,
                                 "All diag registers\n");

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

static ssize_t ath6kl_regread_write(struct file *file,
                                    const char __user *user_buf,
                                    size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        unsigned long reg_addr;

        if (kstrtoul_from_user(user_buf, count, 0, &reg_addr))
                return -EINVAL;

        if ((reg_addr % 4) != 0)
                return -EINVAL;

        if (reg_addr && !ath6kl_dbg_is_diag_reg_valid(reg_addr))
                return -EINVAL;

        ar->debug.dbgfs_diag_reg = reg_addr;

        return count;
}

static const struct file_operations fops_diag_reg_read = {
        .read = ath6kl_regread_read,
        .write = ath6kl_regread_write,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static int ath6kl_regdump_open(struct inode *inode, struct file *file)
{
        struct ath6kl *ar = inode->i_private;
        u8 *buf;
        unsigned long int reg_len;
        unsigned int len = 0, n_reg;
        u32 addr;
        __le32 reg_val;
        int i, status;

        /* Dump all the registers if no register is specified */
        if (!ar->debug.dbgfs_diag_reg)
                n_reg = ath6kl_get_num_reg();
        else
                n_reg = 1;

        reg_len = n_reg * REG_OUTPUT_LEN_PER_LINE;
        if (n_reg > 1)
                reg_len += REGTYPE_STR_LEN;

        buf = vmalloc(reg_len);
        if (!buf)
                return -ENOMEM;

        if (n_reg == 1) {
                addr = ar->debug.dbgfs_diag_reg;

                status = ath6kl_diag_read32(ar,
                                TARG_VTOP(ar->target_type, addr),
                                (u32 *)&reg_val);
                if (status)
                        goto fail_reg_read;

                len += scnprintf(buf + len, reg_len - len,
                                 "0x%06x 0x%08x\n", addr, le32_to_cpu(reg_val));
                goto done;
        }

        for (i = 0; i < ARRAY_SIZE(diag_reg); i++) {
                len += scnprintf(buf + len, reg_len - len,
                                "%s\n", diag_reg[i].reg_info);
                for (addr = diag_reg[i].reg_start;
                     addr <= diag_reg[i].reg_end; addr += 4) {
                        status = ath6kl_diag_read32(ar,
                                        TARG_VTOP(ar->target_type, addr),
                                        (u32 *)&reg_val);
                        if (status)
                                goto fail_reg_read;

                        len += scnprintf(buf + len, reg_len - len,
                                        "0x%06x 0x%08x\n",
                                        addr, le32_to_cpu(reg_val));
                }
        }

done:
        file->private_data = buf;
        return 0;

fail_reg_read:
        ath6kl_warn("Unable to read memory:%u\n", addr);
        vfree(buf);
        return -EIO;
}

static ssize_t ath6kl_regdump_read(struct file *file, char __user *user_buf,
                                  size_t count, loff_t *ppos)
{
        u8 *buf = file->private_data;
        return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
}

static int ath6kl_regdump_release(struct inode *inode, struct file *file)
{
        vfree(file->private_data);
        return 0;
}

static const struct file_operations fops_reg_dump = {
        .open = ath6kl_regdump_open,
        .read = ath6kl_regdump_read,
        .release = ath6kl_regdump_release,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_lrssi_roam_write(struct file *file,
                                       const char __user *user_buf,
                                       size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        unsigned long lrssi_roam_threshold;
        int ret;

        if (kstrtoul_from_user(user_buf, count, 0, &lrssi_roam_threshold))
                return -EINVAL;

        ar->lrssi_roam_threshold = lrssi_roam_threshold;

        ret = ath6kl_wmi_set_roam_lrssi_cmd(ar->wmi, ar->lrssi_roam_threshold);

        if (ret)
                return ret;
        return count;
}

static ssize_t ath6kl_lrssi_roam_read(struct file *file,
                                      char __user *user_buf,
                                      size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        char buf[32];
        unsigned int len;

        len = snprintf(buf, sizeof(buf), "%u\n", ar->lrssi_roam_threshold);

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

static const struct file_operations fops_lrssi_roam_threshold = {
        .read = ath6kl_lrssi_roam_read,
        .write = ath6kl_lrssi_roam_write,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_regwrite_read(struct file *file,
                                    char __user *user_buf,
                                    size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        u8 buf[32];
        unsigned int len = 0;

        len = scnprintf(buf, sizeof(buf), "Addr: 0x%x Val: 0x%x\n",
                        ar->debug.diag_reg_addr_wr, ar->debug.diag_reg_val_wr);

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

static ssize_t ath6kl_regwrite_write(struct file *file,
                                     const char __user *user_buf,
                                     size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        char buf[32];
        char *sptr, *token;
        unsigned int len = 0;
        u32 reg_addr, reg_val;

        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, &reg_addr))
                return -EINVAL;

        if (!ath6kl_dbg_is_diag_reg_valid(reg_addr))
                return -EINVAL;

        if (kstrtou32(sptr, 0, &reg_val))
                return -EINVAL;

        ar->debug.diag_reg_addr_wr = reg_addr;
        ar->debug.diag_reg_val_wr = reg_val;

        if (ath6kl_diag_write32(ar, ar->debug.diag_reg_addr_wr,
                                cpu_to_le32(ar->debug.diag_reg_val_wr)))
                return -EIO;

        return count;
}

static const struct file_operations fops_diag_reg_write = {
        .read = ath6kl_regwrite_read,
        .write = ath6kl_regwrite_write,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

int ath6kl_debug_roam_tbl_event(struct ath6kl *ar, const void *buf,
                                size_t len)
{
        const struct wmi_target_roam_tbl *tbl;
        u16 num_entries;

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

        tbl = (const struct wmi_target_roam_tbl *) buf;
        num_entries = le16_to_cpu(tbl->num_entries);
        if (struct_size(tbl, info, num_entries) > len)
                return -EINVAL;

        if (ar->debug.roam_tbl == NULL ||
            ar->debug.roam_tbl_len < (unsigned int) len) {
                kfree(ar->debug.roam_tbl);
                ar->debug.roam_tbl = kmalloc(len, GFP_ATOMIC);
                if (ar->debug.roam_tbl == NULL)
                        return -ENOMEM;
        }

        memcpy(ar->debug.roam_tbl, buf, len);
        ar->debug.roam_tbl_len = len;

        if (test_bit(ROAM_TBL_PEND, &ar->flag)) {
                clear_bit(ROAM_TBL_PEND, &ar->flag);
                wake_up(&ar->event_wq);
        }

        return 0;
}

static ssize_t ath6kl_roam_table_read(struct file *file, char __user *user_buf,
                                      size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        int ret;
        long left;
        struct wmi_target_roam_tbl *tbl;
        u16 num_entries, i;
        char *buf;
        unsigned int len, buf_len;
        ssize_t ret_cnt;

        if (down_interruptible(&ar->sem))
                return -EBUSY;

        set_bit(ROAM_TBL_PEND, &ar->flag);

        ret = ath6kl_wmi_get_roam_tbl_cmd(ar->wmi);
        if (ret) {
                up(&ar->sem);
                return ret;
        }

        left = wait_event_interruptible_timeout(
                ar->event_wq, !test_bit(ROAM_TBL_PEND, &ar->flag), WMI_TIMEOUT);
        up(&ar->sem);

        if (left <= 0)
                return -ETIMEDOUT;

        if (ar->debug.roam_tbl == NULL)
                return -ENOMEM;

        tbl = (struct wmi_target_roam_tbl *) ar->debug.roam_tbl;
        num_entries = le16_to_cpu(tbl->num_entries);

        buf_len = 100 + num_entries * 100;
        buf = kzalloc(buf_len, GFP_KERNEL);
        if (buf == NULL)
                return -ENOMEM;
        len = 0;
        len += scnprintf(buf + len, buf_len - len,
                         "roam_mode=%u\n\n"
                         "# roam_util bssid rssi rssidt last_rssi util bias\n",
                         le16_to_cpu(tbl->roam_mode));

        for (i = 0; i < num_entries; i++) {
                struct wmi_bss_roam_info *info = &tbl->info[i];
                len += scnprintf(buf + len, buf_len - len,
                                 "%d %pM %d %d %d %d %d\n",
                                 a_sle32_to_cpu(info->roam_util), info->bssid,
                                 info->rssi, info->rssidt, info->last_rssi,
                                 info->util, info->bias);
        }

        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_roam_table = {
        .read = ath6kl_roam_table_read,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_force_roam_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[20];
        size_t len;
        u8 bssid[ETH_ALEN];

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

        if (!mac_pton(buf, bssid))
                return -EINVAL;

        ret = ath6kl_wmi_force_roam_cmd(ar->wmi, bssid);
        if (ret)
                return ret;

        return count;
}

static const struct file_operations fops_force_roam = {
        .write = ath6kl_force_roam_write,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_roam_mode_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[20];
        size_t len;
        enum wmi_roam_mode mode;

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

        if (strcasecmp(buf, "default") == 0)
                mode = WMI_DEFAULT_ROAM_MODE;
        else if (strcasecmp(buf, "bssbias") == 0)
                mode = WMI_HOST_BIAS_ROAM_MODE;
        else if (strcasecmp(buf, "lock") == 0)
                mode = WMI_LOCK_BSS_MODE;
        else
                return -EINVAL;

        ret = ath6kl_wmi_set_roam_mode_cmd(ar->wmi, mode);
        if (ret)
                return ret;

        return count;
}

static const struct file_operations fops_roam_mode = {
        .write = ath6kl_roam_mode_write,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

void ath6kl_debug_set_keepalive(struct ath6kl *ar, u8 keepalive)
{
        ar->debug.keepalive = keepalive;
}

static ssize_t ath6kl_keepalive_read(struct file *file, char __user *user_buf,
                                     size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        char buf[16];
        int len;

        len = snprintf(buf, sizeof(buf), "%u\n", ar->debug.keepalive);

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

static ssize_t ath6kl_keepalive_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;

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

        ret = ath6kl_wmi_set_keepalive_cmd(ar->wmi, 0, val);
        if (ret)
                return ret;

        return count;
}

static const struct file_operations fops_keepalive = {
        .open = simple_open,
        .read = ath6kl_keepalive_read,
        .write = ath6kl_keepalive_write,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

void ath6kl_debug_set_disconnect_timeout(struct ath6kl *ar, u8 timeout)
{
        ar->debug.disc_timeout = timeout;
}

static ssize_t ath6kl_disconnect_timeout_read(struct file *file,
                                              char __user *user_buf,
                                              size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        char buf[16];
        int len;

        len = snprintf(buf, sizeof(buf), "%u\n", ar->debug.disc_timeout);

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

static ssize_t ath6kl_disconnect_timeout_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;

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

        ret = ath6kl_wmi_disctimeout_cmd(ar->wmi, 0, val);
        if (ret)
                return ret;

        return count;
}

static const struct file_operations fops_disconnect_timeout = {
        .open = simple_open,
        .read = ath6kl_disconnect_timeout_read,
        .write = ath6kl_disconnect_timeout_write,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_create_qos_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[200];
        ssize_t len;
        char *sptr, *token;
        struct wmi_create_pstream_cmd pstream;
        u32 val32;
        u16 val16;

        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';
        sptr = buf;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou8(token, 0, &pstream.user_pri))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou8(token, 0, &pstream.traffic_direc))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou8(token, 0, &pstream.traffic_class))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou8(token, 0, &pstream.traffic_type))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou8(token, 0, &pstream.voice_psc_cap))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.min_service_int = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.max_service_int = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.inactivity_int = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.suspension_int = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.service_start_time = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou8(token, 0, &pstream.tsid))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou16(token, 0, &val16))
                return -EINVAL;
        pstream.nominal_msdu = cpu_to_le16(val16);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou16(token, 0, &val16))
                return -EINVAL;
        pstream.max_msdu = cpu_to_le16(val16);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.min_data_rate = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.mean_data_rate = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.peak_data_rate = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.max_burst_size = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.delay_bound = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.min_phy_rate = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.sba = cpu_to_le32(val32);

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou32(token, 0, &val32))
                return -EINVAL;
        pstream.medium_time = cpu_to_le32(val32);

        pstream.nominal_phy = le32_to_cpu(pstream.min_phy_rate) / 1000000;

        ath6kl_wmi_create_pstream_cmd(ar->wmi, vif->fw_vif_idx, &pstream);

        return count;
}

static const struct file_operations fops_create_qos = {
        .write = ath6kl_create_qos_write,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_delete_qos_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[100];
        ssize_t len;
        char *sptr, *token;
        u8 traffic_class;
        u8 tsid;

        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';
        sptr = buf;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou8(token, 0, &traffic_class))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou8(token, 0, &tsid))
                return -EINVAL;

        ath6kl_wmi_delete_pstream_cmd(ar->wmi, vif->fw_vif_idx,
                                      traffic_class, tsid);

        return count;
}

static const struct file_operations fops_delete_qos = {
        .write = ath6kl_delete_qos_write,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_bgscan_int_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 bgscan_int;
        char buf[32];
        ssize_t len;

        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, &bgscan_int))
                return -EINVAL;

        if (bgscan_int == 0)
                bgscan_int = 0xffff;

        vif->bg_scan_period = bgscan_int;

        ath6kl_wmi_scanparams_cmd(ar->wmi, 0, 0, 0, bgscan_int, 0, 0, 0, 3,
                                  0, 0, 0);

        return count;
}

static const struct file_operations fops_bgscan_int = {
        .write = ath6kl_bgscan_int_write,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_listen_int_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 listen_interval;
        char buf[32];
        ssize_t len;

        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, &listen_interval))
                return -EINVAL;

        if ((listen_interval < 15) || (listen_interval > 3000))
                return -EINVAL;

        vif->listen_intvl_t = listen_interval;
        ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
                                      vif->listen_intvl_t, 0);

        return count;
}

static ssize_t ath6kl_listen_int_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->listen_intvl_t);

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

static const struct file_operations fops_listen_int = {
        .read = ath6kl_listen_int_read,
        .write = ath6kl_listen_int_write,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

static ssize_t ath6kl_power_params_write(struct file *file,
                                                const char __user *user_buf,
                                                size_t count, loff_t *ppos)
{
        struct ath6kl *ar = file->private_data;
        u8 buf[100];
        unsigned int len = 0;
        char *sptr, *token;
        u16 idle_period, ps_poll_num, dtim,
                tx_wakeup, num_tx;

        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 (kstrtou16(token, 0, &idle_period))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou16(token, 0, &ps_poll_num))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou16(token, 0, &dtim))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou16(token, 0, &tx_wakeup))
                return -EINVAL;

        token = strsep(&sptr, " ");
        if (!token)
                return -EINVAL;
        if (kstrtou16(token, 0, &num_tx))
                return -EINVAL;

        ath6kl_wmi_pmparams_cmd(ar->wmi, 0, idle_period, ps_poll_num,
                                dtim, tx_wakeup, num_tx, 0);

        return count;
}

static const struct file_operations fops_power_params = {
        .write = ath6kl_power_params_write,
        .open = simple_open,
        .owner = THIS_MODULE,
        .llseek = default_llseek,
};

void ath6kl_debug_init(struct ath6kl *ar)
{
        skb_queue_head_init(&ar->debug.fwlog_queue);
        init_completion(&ar->debug.fwlog_completion);

        /*
         * Actually we are lying here but don't know how to read the mask
         * value from the firmware.
         */
        ar->debug.fwlog_mask = 0;
}

/*
 * Initialisation needs to happen in two stages as fwlog events can come
 * before cfg80211 is initialised, and debugfs depends on cfg80211
 * initialisation.
 */
int ath6kl_debug_init_fs(struct ath6kl *ar)
{
        ar->debugfs_phy = debugfs_create_dir("ath6kl",
                                             ar->wiphy->debugfsdir);

        debugfs_create_file("tgt_stats", 0400, ar->debugfs_phy, ar,
                            &fops_tgt_stats);

        if (ar->hif_type == ATH6KL_HIF_TYPE_SDIO)
                debugfs_create_file("credit_dist_stats", 0400,
                                    ar->debugfs_phy, ar,
                                    &fops_credit_dist_stats);

        debugfs_create_file("endpoint_stats", 0600,
                            ar->debugfs_phy, ar, &fops_endpoint_stats);

        debugfs_create_file("fwlog", 0400, ar->debugfs_phy, ar, &fops_fwlog);

        debugfs_create_file("fwlog_block", 0400, ar->debugfs_phy, ar,
                            &fops_fwlog_block);

        debugfs_create_file("fwlog_mask", 0600, ar->debugfs_phy,
                            ar, &fops_fwlog_mask);

        debugfs_create_file("reg_addr", 0600, ar->debugfs_phy, ar,
                            &fops_diag_reg_read);

        debugfs_create_file("reg_dump", 0400, ar->debugfs_phy, ar,
                            &fops_reg_dump);

        debugfs_create_file("lrssi_roam_threshold", 0600,
                            ar->debugfs_phy, ar, &fops_lrssi_roam_threshold);

        debugfs_create_file("reg_write", 0600,
                            ar->debugfs_phy, ar, &fops_diag_reg_write);

        debugfs_create_file("war_stats", 0400, ar->debugfs_phy, ar,
                            &fops_war_stats);

        debugfs_create_file("roam_table", 0400, ar->debugfs_phy, ar,
                            &fops_roam_table);

        debugfs_create_file("force_roam", 0200, ar->debugfs_phy, ar,
                            &fops_force_roam);

        debugfs_create_file("roam_mode", 0200, ar->debugfs_phy, ar,
                            &fops_roam_mode);

        debugfs_create_file("keepalive", 0600, ar->debugfs_phy, ar,
                            &fops_keepalive);

        debugfs_create_file("disconnect_timeout", 0600,
                            ar->debugfs_phy, ar, &fops_disconnect_timeout);

        debugfs_create_file("create_qos", 0200, ar->debugfs_phy, ar,
                            &fops_create_qos);

        debugfs_create_file("delete_qos", 0200, ar->debugfs_phy, ar,
                            &fops_delete_qos);

        debugfs_create_file("bgscan_interval", 0200,
                            ar->debugfs_phy, ar, &fops_bgscan_int);

        debugfs_create_file("listen_interval", 0600,
                            ar->debugfs_phy, ar, &fops_listen_int);

        debugfs_create_file("power_params", 0200, ar->debugfs_phy, ar,
                            &fops_power_params);

        return 0;
}

void ath6kl_debug_cleanup(struct ath6kl *ar)
{
        skb_queue_purge(&ar->debug.fwlog_queue);
        complete(&ar->debug.fwlog_completion);
        kfree(ar->debug.roam_tbl);
}

#endif