CORE/HDD/src/wlan_hdd_debugfs.c

/*
 * Copyright (c) 2013-2017 The Linux Foundation. All rights reserved.
 *
 * Previously licensed under the ISC license by 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.
 */

/*
 * This file was originally distributed by Qualcomm Atheros, Inc.
 * under proprietary terms before Copyright ownership was assigned
 * to the Linux Foundation.
 */

#ifdef WLAN_OPEN_SOURCE
#include <wlan_hdd_includes.h>
#include <wlan_hdd_wowl.h>
#include <vos_sched.h>
#include "wlan_hdd_debugfs.h"
#include "wlan_hdd_debugfs_ocb.h"

#define MAX_USER_COMMAND_SIZE_WOWL_ENABLE 8
#define MAX_USER_COMMAND_SIZE_WOWL_PATTERN 512

#ifdef MULTI_IF_NAME
#define HDD_DEBUGFS_DIRNAME "wlan_wcnss" MULTI_IF_NAME
#else
#define HDD_DEBUGFS_DIRNAME "wlan_wcnss"
#endif

#ifdef WLAN_POWER_DEBUGFS
#define POWER_DEBUGFS_BUFFER_MAX_LEN 4096
#endif

/**
 * __wcnss_wowenable_write() - write wow enable
 * @file: file pointer
 * @buf: buffer
 * @count: count
 * @ppos: position pointer
 *
 * Return: 0 on success, error number otherwise
 */
static ssize_t __wcnss_wowenable_write(struct file *file,
               const char __user *buf, size_t count, loff_t *ppos)
{

    hdd_adapter_t *pAdapter;
    hdd_context_t *hdd_ctx;
    char cmd[MAX_USER_COMMAND_SIZE_WOWL_ENABLE + 1];
    char *sptr, *token;
    v_U8_t wow_enable = 0;
    v_U8_t wow_mp = 0;
    v_U8_t wow_pbm = 0;
    int ret;

    ENTER();

    pAdapter = (hdd_adapter_t *)file->private_data;
    if ((NULL == pAdapter) || (WLAN_HDD_ADAPTER_MAGIC != pAdapter->magic))
    {
        VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL,
                  "%s: Invalid adapter or adapter has invalid magic.",
                  __func__);

        return -EINVAL;
    }

    hdd_ctx = WLAN_HDD_GET_CTX(pAdapter);
    ret = wlan_hdd_validate_context(hdd_ctx);
    if (0 != ret)
        return ret;

    if (!sme_IsFeatureSupportedByFW(WOW))
    {
        VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                  "%s: Wake-on-Wireless feature is not supported "
                  "in firmware!", __func__);

        return -EINVAL;
    }

    if (count > MAX_USER_COMMAND_SIZE_WOWL_ENABLE)
    {
        VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                  "%s: Command length is larger than %d bytes.",
                  __func__, MAX_USER_COMMAND_SIZE_WOWL_ENABLE);

        return -EINVAL;
    }

    /* Get command from user */
    if (copy_from_user(cmd, buf, count))
        return -EFAULT;
    cmd[count] = '\0';
    sptr = cmd;

    /* Get enable or disable wow */
    token = strsep(&sptr, " ");
    if (!token)
        return -EINVAL;
    if (kstrtou8(token, 0, &wow_enable))
        return -EINVAL;

    /* Disable wow */
    if (!wow_enable) {
        if (!hdd_exit_wowl(pAdapter))
        {
          VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                    "%s: hdd_exit_wowl failed!", __func__);

          return -EFAULT;
        }

        return count;
    }

    /* Get enable or disable magic packet mode */
    token = strsep(&sptr, " ");
    if (!token)
        return -EINVAL;
    if (kstrtou8(token, 0, &wow_mp))
        return -EINVAL;
    if (wow_mp > 1)
        wow_mp = 1;

    /* Get enable or disable pattern byte matching mode */
    token = strsep(&sptr, " ");
    if (!token)
        return -EINVAL;
    if (kstrtou8(token, 0, &wow_pbm))
        return -EINVAL;
    if (wow_pbm > 1)
        wow_pbm = 1;

    if (!hdd_enter_wowl(pAdapter, wow_mp, wow_pbm))
    {
      VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                "%s: hdd_enter_wowl failed!", __func__);

      return -EFAULT;
    }
    EXIT();
    return count;
}

/**
 * wcnss_wowenable_write() - SSR wrapper for wcnss_wowenable_write
 * @file: file pointer
 * @buf: buffer
 * @count: count
 * @ppos: position pointer
 *
 * Return: 0 on success, error number otherwise
 */
static ssize_t wcnss_wowenable_write(struct file *file,
				 const char __user *buf,
				 size_t count, loff_t *ppos)
{
	ssize_t ret;

	vos_ssr_protect(__func__);
	ret = __wcnss_wowenable_write(file, buf, count, ppos);
	vos_ssr_unprotect(__func__);

	return ret;
}

/**
 * __wcnss_wowpattern_write() - write wow pattern
 * @file: file pointer
 * @buf: buffer
 * @count: count
 * @ppos: position pointer
 *
 * Return: 0 on success, error number otherwise
 */
static ssize_t __wcnss_wowpattern_write(struct file *file,
               const char __user *buf, size_t count, loff_t *ppos)
{
    hdd_adapter_t *pAdapter = (hdd_adapter_t *)file->private_data;
    hdd_context_t *hdd_ctx;
    char cmd[MAX_USER_COMMAND_SIZE_WOWL_PATTERN + 1];
    char *sptr, *token;
    v_U8_t pattern_idx = 0;
    v_U8_t pattern_offset = 0;
    char *pattern_buf;
    char *pattern_mask;
    int ret;

    if ((NULL == pAdapter) || (WLAN_HDD_ADAPTER_MAGIC != pAdapter->magic))
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL,
                   "%s: Invalid adapter or adapter has invalid magic.",
                   __func__);

        return -EINVAL;
    }

    hdd_ctx = WLAN_HDD_GET_CTX(pAdapter);
    ret = wlan_hdd_validate_context(hdd_ctx);
    if (0 != ret)
        return ret;

    if (!sme_IsFeatureSupportedByFW(WOW))
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: Wake-on-Wireless feature is not supported "
                   "in firmware!", __func__);

        return -EINVAL;
    }

    if (count > MAX_USER_COMMAND_SIZE_WOWL_PATTERN)
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: Command length is larger than %d bytes.",
                   __func__, MAX_USER_COMMAND_SIZE_WOWL_PATTERN);

        return -EINVAL;
    }

    /* Get command from user */
    if (copy_from_user(cmd, buf, count))
        return -EFAULT;
    cmd[count] = '\0';
    sptr = cmd;

    /* Get pattern idx */
    token = strsep(&sptr, " ");
    if (!token)
        return -EINVAL;

    if (kstrtou8(token, 0, &pattern_idx))
        return -EINVAL;

    /* Get pattern offset */
    token = strsep(&sptr, " ");

    /* Delete pattern if no further argument */
    if (!token) {
        hdd_del_wowl_ptrn_debugfs(pAdapter, pattern_idx);

        return count;
    }

    if (kstrtou8(token, 0, &pattern_offset))
        return -EINVAL;

    /* Get pattern */
    token = strsep(&sptr, " ");
    if (!token)
        return -EINVAL;

    pattern_buf = token;

    /* Get pattern mask */
    token = strsep(&sptr, " ");
    if (!token)
        return -EINVAL;

    pattern_mask = token;
    pattern_mask[strlen(pattern_mask) - 1] = '\0';

    hdd_add_wowl_ptrn_debugfs(pAdapter, pattern_idx, pattern_offset,
                              pattern_buf, pattern_mask);
    EXIT();
    return count;
}

/**
 * wcnss_wowpattern_write() - SSR wrapper for __wcnss_wowpattern_write
 * @file: file pointer
 * @buf: buffer
 * @count: count
 * @ppos: position pointer
 *
 * Return: 0 on success, error number otherwise
 */
static ssize_t wcnss_wowpattern_write(struct file *file,
				      const char __user *buf,
				      size_t count, loff_t *ppos)
{
	ssize_t ret;

	vos_ssr_protect(__func__);
	ret = __wcnss_wowpattern_write(file, buf, count, ppos);
	vos_ssr_unprotect(__func__);

	return ret;
}

/**
 * __wcnss_patterngen_write() - write pattern
 * @file: file pointer
 * @buf: buffer
 * @count: count
 * @ppos: position pointer
 *
 * Return: 0 on success, error number otherwise
 */
static ssize_t __wcnss_patterngen_write(struct file *file,
					const char __user *buf,
					size_t count, loff_t *ppos)
{
    hdd_adapter_t *pAdapter;
    hdd_context_t *pHddCtx;
    tSirAddPeriodicTxPtrn *addPeriodicTxPtrnParams;
    tSirDelPeriodicTxPtrn *delPeriodicTxPtrnParams;

    char *cmd, *sptr, *token;
    v_U8_t pattern_idx = 0;
    v_U8_t pattern_duration = 0;
    char *pattern_buf;
    v_U16_t pattern_len = 0;
    v_U16_t i = 0;
    int ret;

    ENTER();

    pAdapter = (hdd_adapter_t *)file->private_data;
    if ((NULL == pAdapter) || (WLAN_HDD_ADAPTER_MAGIC != pAdapter->magic))
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL,
                   "%s: Invalid adapter or adapter has invalid magic.",
                   __func__);

        return -EINVAL;
    }

    pHddCtx = WLAN_HDD_GET_CTX(pAdapter);
    ret = wlan_hdd_validate_context(pHddCtx);
    if (0 != ret)
        return ret;

    if (!sme_IsFeatureSupportedByFW(WLAN_PERIODIC_TX_PTRN))
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: Periodic Tx Pattern Offload feature is not supported "
                   "in firmware!", __func__);
        return -EINVAL;
    }

    /* Get command from user */
    if (count <= MAX_USER_COMMAND_SIZE_FRAME)
        cmd = vos_mem_malloc(count + 1);
    else
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: Command length is larger than %d bytes.",
                   __func__, MAX_USER_COMMAND_SIZE_FRAME);

        return -EINVAL;
    }

    if (!cmd)
    {
        VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                  "%s: Memory allocation for cmd failed!", __func__);

        return -EFAULT;
    }

    if (copy_from_user(cmd, buf, count))
    {
        vos_mem_free(cmd);
        return -EFAULT;
    }
    cmd[count] = '\0';
    sptr = cmd;

    /* Get pattern idx */
    token = strsep(&sptr, " ");
    if (!token)
        goto failure;
    if (kstrtou8(token, 0, &pattern_idx))
        goto failure;

    if (pattern_idx > (MAXNUM_PERIODIC_TX_PTRNS - 1))
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: Pattern index %d is not in the range (0 ~ %d).",
                   __func__, pattern_idx, MAXNUM_PERIODIC_TX_PTRNS - 1);

        goto failure;
    }

    /* Get pattern duration */
    token = strsep(&sptr, " ");
    if (!token)
        goto failure;
    if (kstrtou8(token, 0, &pattern_duration))
        goto failure;

    /* Delete pattern using index if duration is 0 */
    if (!pattern_duration)
    {
        delPeriodicTxPtrnParams =
            vos_mem_malloc(sizeof(tSirDelPeriodicTxPtrn));
        if (!delPeriodicTxPtrnParams)
        {
            VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                      "%s: Memory allocation for delPeriodicTxPtrnParams "
                      "failed!", __func__);

            vos_mem_free(cmd);
            return -EFAULT;
        }
        delPeriodicTxPtrnParams->ucPtrnId = pattern_idx;
        delPeriodicTxPtrnParams->ucPatternIdBitmap = 1 << pattern_idx;
        vos_mem_copy(delPeriodicTxPtrnParams->macAddress,
                    pAdapter->macAddressCurrent.bytes, 6);

        /* Delete pattern */
        if (eHAL_STATUS_SUCCESS != sme_DelPeriodicTxPtrn(pHddCtx->hHal,
                                                delPeriodicTxPtrnParams))
        {
            VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                       "%s: sme_DelPeriodicTxPtrn() failed!", __func__);

            vos_mem_free(delPeriodicTxPtrnParams);
            goto failure;
        }
        vos_mem_free(cmd);
        vos_mem_free(delPeriodicTxPtrnParams);
        return count;
    }

    /* Check if it's in connected state only when adding patterns */
    if (!hdd_connIsConnected(WLAN_HDD_GET_STATION_CTX_PTR(pAdapter)))
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: Not in Connected state!", __func__);

        goto failure;
    }

    /* Get pattern */
    token = strsep(&sptr, " ");
    if (!token)
        goto failure;

    pattern_buf = token;
    pattern_buf[strlen(pattern_buf) - 1] = '\0';
    pattern_len = strlen(pattern_buf);

    /* Since the pattern is a hex string, 2 characters represent 1 byte. */
    if (pattern_len % 2)
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: Malformed pattern!", __func__);

        goto failure;
    }
    else
        pattern_len >>= 1;

    if (pattern_len < 14 || pattern_len > PERIODIC_TX_PTRN_MAX_SIZE)
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: Not an 802.3 frame!", __func__);

        goto failure;
    }

    addPeriodicTxPtrnParams = vos_mem_malloc(sizeof(tSirAddPeriodicTxPtrn));
    if (!addPeriodicTxPtrnParams)
    {
        VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                  "%s: Memory allocation for addPeriodicTxPtrnParams "
                  "failed!", __func__);

        vos_mem_free(cmd);
        return -EFAULT;
    }

    addPeriodicTxPtrnParams->ucPtrnId = pattern_idx;
    addPeriodicTxPtrnParams->usPtrnIntervalMs = pattern_duration * 500;
    addPeriodicTxPtrnParams->ucPtrnSize = pattern_len;
    vos_mem_copy(addPeriodicTxPtrnParams->macAddress,
                 pAdapter->macAddressCurrent.bytes, 6);

    /* Extract the pattern */
    for(i = 0; i < addPeriodicTxPtrnParams->ucPtrnSize; i++)
    {
        addPeriodicTxPtrnParams->ucPattern[i] =
        (hdd_parse_hex(pattern_buf[0]) << 4) + hdd_parse_hex(pattern_buf[1]);

        /* Skip to next byte */
        pattern_buf += 2;
    }

    /* Add pattern */
    if (eHAL_STATUS_SUCCESS != sme_AddPeriodicTxPtrn(pHddCtx->hHal,
                                            addPeriodicTxPtrnParams))
    {
        VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
                   "%s: sme_AddPeriodicTxPtrn() failed!", __func__);

        vos_mem_free(addPeriodicTxPtrnParams);
        goto failure;
    }
    vos_mem_free(cmd);
    vos_mem_free(addPeriodicTxPtrnParams);
    EXIT();
    return count;

failure:
    vos_mem_free(cmd);
    return -EINVAL;
}

/**
 * wcnss_patterngen_write() - SSR wrapper for __wcnss_patterngen_write
 * @file: file pointer
 * @buf: buffer
 * @count: count
 * @ppos: position pointer
 *
 * Return: 0 on success, error number otherwise
 */
static ssize_t wcnss_patterngen_write(struct file *file,
				      const char __user *buf,
				      size_t count, loff_t *ppos)
{
	ssize_t ret;

	vos_ssr_protect(__func__);
	ret = __wcnss_patterngen_write(file, buf, count, ppos);
	vos_ssr_unprotect(__func__);

	return ret;
}

/**
 * __wlan_hdd_debugfs_open() - open debugfs
 * @inode: inode pointer
 * @file: file pointer
 *
 * Return: 0 on success, error number otherwise
 */
static int __wlan_hdd_debugfs_open(struct inode *inode, struct file *file)
{
	hdd_adapter_t *adapter;
	hdd_context_t *hdd_ctx;
	int ret;

	ENTER();

	if (inode->i_private)
		file->private_data = inode->i_private;

	adapter = (hdd_adapter_t *)file->private_data;
	if ((NULL == adapter) || (WLAN_HDD_ADAPTER_MAGIC != adapter->magic)) {
		VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL,
			   "%s: Invalid adapter or adapter has invalid magic.",
			   __func__);
		return -EINVAL;
	}

	hdd_ctx = WLAN_HDD_GET_CTX(adapter);
	ret = wlan_hdd_validate_context(hdd_ctx);
	if (0 != ret)
		return ret;

	EXIT();
	return 0;
}

/**
 * wlan_hdd_debugfs_open() - SSR wrapper for __wlan_hdd_debugfs_open
 * @inode: inode pointer
 * @file: file pointer
 *
 * Return: 0 on success, error number otherwise
 */
int wlan_hdd_debugfs_open(struct inode *inode, struct file *file)
{
	int ret;

	vos_ssr_protect(__func__);
	ret = __wlan_hdd_debugfs_open(inode, file);
	vos_ssr_unprotect(__func__);

	return ret;
}

#ifdef WLAN_POWER_DEBUGFS
/**
 * hdd_power_debugstats_cb() - callback routine for Power stats debugs
 * @response: Pointer to Power stats response
 * @context: Pointer to statsContext
 *
 * Return: None
 */
static void hdd_power_debugstats_cb(struct power_stats_response *response,
						void *context)
{
	struct statsContext *stats_context;
	struct power_stats_response *power_stats;
	hdd_adapter_t *adapter;
	uint32_t power_stats_len;
	uint32_t stats_registers_len;

	ENTER();
	if (NULL == context) {
		hddLog(LOGE, FL("context is NULL"));
		return;
	}

	stats_context = (struct statsContext *)context;

	spin_lock(&hdd_context_lock);
	adapter = stats_context->pAdapter;
	if ((POWER_STATS_MAGIC != stats_context->magic) ||
	    (NULL == adapter) ||
	    (WLAN_HDD_ADAPTER_MAGIC != adapter->magic)) {
		spin_unlock(&hdd_context_lock);
		hddLog(LOGE, FL("Invalid context, adapter [%pK] magic [%08x]"),
			adapter, stats_context->magic);
		return;
	}

	/* Invalidate the Stats context magic */
	stats_context->magic = 0;

	stats_registers_len = (sizeof(response->debug_registers[0]) *
					response->num_debug_register);
	power_stats_len = stats_registers_len + sizeof(*power_stats);
	adapter->chip_power_stats = vos_mem_malloc(power_stats_len);
	if (!adapter->chip_power_stats) {
		hddLog(LOGE, FL("Power stats memory alloc fails!"));
		goto exit_stats_cb;
	}

	power_stats = adapter->chip_power_stats;
	vos_mem_zero(power_stats, power_stats_len);

	power_stats->cumulative_sleep_time_ms
			= response->cumulative_sleep_time_ms;
	power_stats->cumulative_total_on_time_ms
			= response->cumulative_total_on_time_ms;
	power_stats->deep_sleep_enter_counter
			= response->deep_sleep_enter_counter;
	power_stats->last_deep_sleep_enter_tstamp_ms
			= response->last_deep_sleep_enter_tstamp_ms;
	power_stats->debug_register_fmt
			= response->debug_register_fmt;
	power_stats->num_debug_register
			= response->num_debug_register;

	power_stats->debug_registers = (uint32_t *)(power_stats + 1);

	vos_mem_copy(power_stats->debug_registers,
			response->debug_registers,
			stats_registers_len);

exit_stats_cb:
	complete(&stats_context->completion);
	spin_unlock(&hdd_context_lock);
	EXIT();
}

/**
 * __wlan_hdd_read_power_debugfs() - API to collect Chip power stats from FW
 * @file: file pointer
 * @buf: buffer
 * @count: count
 * @pos: position pointer
 *
 * Return: Number of bytes read on success, error number otherwise
 */
static ssize_t __wlan_hdd_read_power_debugfs(struct file *file,
				char __user *buf,
				size_t count, loff_t *pos)
{
	hdd_adapter_t *adapter;
	hdd_context_t *hdd_ctx;
	struct statsContext context;
	struct power_stats_response *chip_power_stats;
	ssize_t ret_cnt = 0;
	int rc = 0, j;
	unsigned int len = 0;
	char *power_debugfs_buf;

	ENTER();
	adapter = (hdd_adapter_t *)file->private_data;
	if ((NULL == adapter) || (WLAN_HDD_ADAPTER_MAGIC != adapter->magic)) {
		hddLog(LOGE,
			FL("Invalid adapter or adapter has invalid magic"));
		return -EINVAL;
	}

	hdd_ctx = WLAN_HDD_GET_CTX(adapter);
	ret_cnt = wlan_hdd_validate_context(hdd_ctx);
	if (0 != ret_cnt)
		return ret_cnt;

	mutex_lock(&hdd_ctx->power_stats_lock);

	if (adapter->chip_power_stats)
		vos_mem_free(adapter->chip_power_stats);

	adapter->chip_power_stats = NULL;
	context.pAdapter = adapter;
	context.magic = POWER_STATS_MAGIC;

	init_completion(&context.completion);

	if (eHAL_STATUS_SUCCESS !=
		sme_power_debug_stats_req(hdd_ctx->hHal,
					hdd_power_debugstats_cb,
					&context)) {
		hddLog(LOGE, FL("chip power stats request failed"));
		ret_cnt = -EINVAL;
		goto out;
	}

	rc = wait_for_completion_timeout(&context.completion,
			msecs_to_jiffies(WLAN_WAIT_TIME_POWER_STATS));
	if (!rc) {
		hddLog(LOGE, FL("Target response timed out Power stats"));
		/* Invalidate the Stats context magic */
		spin_lock(&hdd_context_lock);
		context.magic = 0;
		spin_unlock(&hdd_context_lock);
		ret_cnt = -ETIMEDOUT;
		goto out;
	}

	chip_power_stats = adapter->chip_power_stats;
	if (!chip_power_stats) {
		hddLog(LOGE, FL("Power stats retrieval fails!"));
		ret_cnt = -EINVAL;
		goto out;
	}

	power_debugfs_buf = vos_mem_malloc(POWER_DEBUGFS_BUFFER_MAX_LEN);
	if (!power_debugfs_buf) {
		hddLog(LOGE, FL("Power stats buffer alloc fails!"));
		vos_mem_free(chip_power_stats);
		adapter->chip_power_stats = NULL;
		ret_cnt = -EINVAL;
		goto out;
	}

	len += scnprintf(power_debugfs_buf, POWER_DEBUGFS_BUFFER_MAX_LEN,
			"POWER DEBUG STATS\n=================\n"
			"cumulative_sleep_time_ms: %d\n"
			"cumulative_total_on_time_ms: %d\n"
			"deep_sleep_enter_counter: %d\n"
			"last_deep_sleep_enter_tstamp_ms: %d\n"
			"debug_register_fmt: %d\n"
			"num_debug_register: %d\n",
			chip_power_stats->cumulative_sleep_time_ms,
			chip_power_stats->cumulative_total_on_time_ms,
			chip_power_stats->deep_sleep_enter_counter,
			chip_power_stats->last_deep_sleep_enter_tstamp_ms,
			chip_power_stats->debug_register_fmt,
			chip_power_stats->num_debug_register);

	for (j = 0; j < chip_power_stats->num_debug_register; j++) {
		if ((POWER_DEBUGFS_BUFFER_MAX_LEN - len) > 0)
			len += scnprintf(power_debugfs_buf + len,
					POWER_DEBUGFS_BUFFER_MAX_LEN - len,
					"debug_registers[%d]: 0x%x\n", j,
					chip_power_stats->debug_registers[j]);
		else
			j = chip_power_stats->num_debug_register;
	}

	vos_mem_free(chip_power_stats);
	adapter->chip_power_stats = NULL;

	ret_cnt = simple_read_from_buffer(buf, count, pos,
					power_debugfs_buf, len);
	vos_mem_free(power_debugfs_buf);

out:
	mutex_unlock(&hdd_ctx->power_stats_lock);
	return ret_cnt;
}

/**
 * wlan_hdd_read_power_debugfs() - SSR wrapper function to read power debugfs
 * @file: file pointer
 * @buf: buffer
 * @count: count
 * @pos: position pointer
 *
 * Return: Number of bytes read on success, error number otherwise
 */
static ssize_t wlan_hdd_read_power_debugfs(struct file *file,
				char __user *buf,
				size_t count, loff_t *pos)
{
	int ret;

	vos_ssr_protect(__func__);
	ret = __wlan_hdd_read_power_debugfs(file, buf, count, pos);
	vos_ssr_unprotect(__func__);

	return ret;
}

/**
 * __wlan_hdd_open_power_debugfs() - Function to save private on open
 * @inode: Pointer to inode structure
 * @file: file pointer
 *
 * Return: zero
 */
static int __wlan_hdd_open_power_debugfs(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}

/**
 * wlan_hdd_open_power_debugfs() - SSR wrapper function to save private on open
 * @inode: Pointer to inode structure
 * @file: file pointer
 *
 * Return: zero
 */
static int wlan_hdd_open_power_debugfs(struct inode *inode, struct file *file)
{
	int ret;

	vos_ssr_protect(__func__);
	ret = __wlan_hdd_open_power_debugfs(inode, file);
	vos_ssr_unprotect(__func__);

	return ret;
}

#endif


static const struct file_operations fops_wowenable = {
    .write = wcnss_wowenable_write,
    .open = wlan_hdd_debugfs_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static const struct file_operations fops_wowpattern = {
    .write = wcnss_wowpattern_write,
    .open = wlan_hdd_debugfs_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static const struct file_operations fops_patterngen = {
    .write = wcnss_patterngen_write,
    .open = wlan_hdd_debugfs_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

#ifdef WLAN_POWER_DEBUGFS
static const struct file_operations fops_powerdebugs = {
	.read = wlan_hdd_read_power_debugfs,
	.open = wlan_hdd_open_power_debugfs,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

/**
 * wlan_hdd_init_power_stats_debugfs() - API to init power stats debugfs
 *
 * Return: VOS_STATUS
 */
static VOS_STATUS wlan_hdd_init_power_stats_debugfs(hdd_adapter_t *adapter,
						    hdd_context_t *hdd_ctx)
{
	if (NULL == debugfs_create_file("power_stats",
				S_IRUSR | S_IRGRP | S_IROTH,
				hdd_ctx->debugfs_phy, adapter,
				&fops_powerdebugs))
		return VOS_STATUS_E_FAILURE;

	mutex_init(&hdd_ctx->power_stats_lock);

	return VOS_STATUS_SUCCESS;
}

/**
 * wlan_hdd_deinit_power_stats_debugfs() - API to deinit power stats debugfs
 *
 * Return: None
 */
static void wlan_hdd_deinit_power_stats_debugfs(hdd_context_t *hdd_ctx)
{
	mutex_destroy(&hdd_ctx->power_stats_lock);
}
#else
static VOS_STATUS wlan_hdd_init_power_stats_debugfs(hdd_adapter_t *adapter,
						    hdd_context_t *hdd_ctx)
{
	return VOS_STATUS_SUCCESS;
}

static void wlan_hdd_deinit_power_stats_debugfs(hdd_context_t *hdd_ctx)
{
	return;
}
#endif

VOS_STATUS hdd_debugfs_init(hdd_adapter_t *pAdapter)
{
    hdd_context_t *pHddCtx = WLAN_HDD_GET_CTX(pAdapter);
    pHddCtx->debugfs_phy = debugfs_create_dir(HDD_DEBUGFS_DIRNAME, 0);

    if (NULL == pHddCtx->debugfs_phy)
        return VOS_STATUS_E_FAILURE;

    if (NULL == debugfs_create_file("wow_enable", S_IRUSR | S_IWUSR,
        pHddCtx->debugfs_phy, pAdapter, &fops_wowenable))
        return VOS_STATUS_E_FAILURE;

    if (NULL == debugfs_create_file("wow_pattern", S_IRUSR | S_IWUSR,
        pHddCtx->debugfs_phy, pAdapter, &fops_wowpattern))
        return VOS_STATUS_E_FAILURE;

    if (NULL == debugfs_create_file("pattern_gen", S_IRUSR | S_IWUSR,
        pHddCtx->debugfs_phy, pAdapter, &fops_patterngen))
        return VOS_STATUS_E_FAILURE;

    if (VOS_STATUS_SUCCESS != wlan_hdd_init_power_stats_debugfs(pAdapter,
                                                                pHddCtx))
        return VOS_STATUS_E_FAILURE;

    if (wlan_hdd_create_dsrc_tx_stats_file(pAdapter, pHddCtx))
        return VOS_STATUS_E_FAILURE;

    if (wlan_hdd_create_dsrc_chan_stats_file(pAdapter, pHddCtx))
        return VOS_STATUS_E_FAILURE;

    return VOS_STATUS_SUCCESS;
}

void hdd_debugfs_exit(hdd_context_t *pHddCtx)
{
    wlan_hdd_deinit_power_stats_debugfs(pHddCtx);
    debugfs_remove_recursive(pHddCtx->debugfs_phy);
}
#endif /* #ifdef WLAN_OPEN_SOURCE */