debugfs.c

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/*
 * Marvell Wireless LAN device driver: debugfs
 *
 * Copyright (C) 2011, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include <linux/debugfs.h>

#include "main.h"
#include "11n.h"


static struct dentry *mwifiex_dfs_dir;

static char *bss_modes[] = {
    "Unknown",
    "Ad-hoc",
    "Managed",
    "Auto"
};

/* size/addr for mwifiex_debug_info */
#define item_size(n)        (FIELD_SIZEOF(struct mwifiex_debug_info, n))
#define item_addr(n)        (offsetof(struct mwifiex_debug_info, n))

/* size/addr for struct mwifiex_adapter */
#define adapter_item_size(n)    (FIELD_SIZEOF(struct mwifiex_adapter, n))
#define adapter_item_addr(n)    (offsetof(struct mwifiex_adapter, n))

struct mwifiex_debug_data {
    char name[32];      /* variable/array name */
    u32 size;       /* size of the variable/array */
    size_t addr;        /* address of the variable/array */
    int num;        /* number of variables in an array */
};

static struct mwifiex_debug_data items[] = {
    {"int_counter", item_size(int_counter),
     item_addr(int_counter), 1},
    {"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]),
     item_addr(packets_out[WMM_AC_VO]), 1},
    {"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]),
     item_addr(packets_out[WMM_AC_VI]), 1},
    {"wmm_ac_be", item_size(packets_out[WMM_AC_BE]),
     item_addr(packets_out[WMM_AC_BE]), 1},
    {"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]),
     item_addr(packets_out[WMM_AC_BK]), 1},
    {"max_tx_buf_size", item_size(max_tx_buf_size),
     item_addr(max_tx_buf_size), 1},
    {"tx_buf_size", item_size(tx_buf_size),
     item_addr(tx_buf_size), 1},
    {"curr_tx_buf_size", item_size(curr_tx_buf_size),
     item_addr(curr_tx_buf_size), 1},
    {"ps_mode", item_size(ps_mode),
     item_addr(ps_mode), 1},
    {"ps_state", item_size(ps_state),
     item_addr(ps_state), 1},
    {"is_deep_sleep", item_size(is_deep_sleep),
     item_addr(is_deep_sleep), 1},
    {"wakeup_dev_req", item_size(pm_wakeup_card_req),
     item_addr(pm_wakeup_card_req), 1},
    {"wakeup_tries", item_size(pm_wakeup_fw_try),
     item_addr(pm_wakeup_fw_try), 1},
    {"hs_configured", item_size(is_hs_configured),
     item_addr(is_hs_configured), 1},
    {"hs_activated", item_size(hs_activated),
     item_addr(hs_activated), 1},
    {"num_tx_timeout", item_size(num_tx_timeout),
     item_addr(num_tx_timeout), 1},
    {"num_cmd_timeout", item_size(num_cmd_timeout),
     item_addr(num_cmd_timeout), 1},
    {"timeout_cmd_id", item_size(timeout_cmd_id),
     item_addr(timeout_cmd_id), 1},
    {"timeout_cmd_act", item_size(timeout_cmd_act),
     item_addr(timeout_cmd_act), 1},
    {"last_cmd_id", item_size(last_cmd_id),
     item_addr(last_cmd_id), DBG_CMD_NUM},
    {"last_cmd_act", item_size(last_cmd_act),
     item_addr(last_cmd_act), DBG_CMD_NUM},
    {"last_cmd_index", item_size(last_cmd_index),
     item_addr(last_cmd_index), 1},
    {"last_cmd_resp_id", item_size(last_cmd_resp_id),
     item_addr(last_cmd_resp_id), DBG_CMD_NUM},
    {"last_cmd_resp_index", item_size(last_cmd_resp_index),
     item_addr(last_cmd_resp_index), 1},
    {"last_event", item_size(last_event),
     item_addr(last_event), DBG_CMD_NUM},
    {"last_event_index", item_size(last_event_index),
     item_addr(last_event_index), 1},
    {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure),
     item_addr(num_cmd_host_to_card_failure), 1},
    {"num_cmd_sleep_cfm_fail",
     item_size(num_cmd_sleep_cfm_host_to_card_failure),
     item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1},
    {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure),
     item_addr(num_tx_host_to_card_failure), 1},
    {"num_evt_deauth", item_size(num_event_deauth),
     item_addr(num_event_deauth), 1},
    {"num_evt_disassoc", item_size(num_event_disassoc),
     item_addr(num_event_disassoc), 1},
    {"num_evt_link_lost", item_size(num_event_link_lost),
     item_addr(num_event_link_lost), 1},
    {"num_cmd_deauth", item_size(num_cmd_deauth),
     item_addr(num_cmd_deauth), 1},
    {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success),
     item_addr(num_cmd_assoc_success), 1},
    {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure),
     item_addr(num_cmd_assoc_failure), 1},
    {"cmd_sent", item_size(cmd_sent),
     item_addr(cmd_sent), 1},
    {"data_sent", item_size(data_sent),
     item_addr(data_sent), 1},
    {"cmd_resp_received", item_size(cmd_resp_received),
     item_addr(cmd_resp_received), 1},
    {"event_received", item_size(event_received),
     item_addr(event_received), 1},

    /* variables defined in struct mwifiex_adapter */
    {"cmd_pending", adapter_item_size(cmd_pending),
     adapter_item_addr(cmd_pending), 1},
    {"tx_pending", adapter_item_size(tx_pending),
     adapter_item_addr(tx_pending), 1},
    {"rx_pending", adapter_item_size(rx_pending),
     adapter_item_addr(rx_pending), 1},
};

static int num_of_items = ARRAY_SIZE(items);

/*
 * Proc info file read handler.
 *
 * This function is called when the 'info' file is opened for reading.
 * It prints the following driver related information -
 *      - Driver name
 *      - Driver version
 *      - Driver extended version
 *      - Interface name
 *      - BSS mode
 *      - Media state (connected or disconnected)
 *      - MAC address
 *      - Total number of Tx bytes
 *      - Total number of Rx bytes
 *      - Total number of Tx packets
 *      - Total number of Rx packets
 *      - Total number of dropped Tx packets
 *      - Total number of dropped Rx packets
 *      - Total number of corrupted Tx packets
 *      - Total number of corrupted Rx packets
 *      - Carrier status (on or off)
 *      - Tx queue status (started or stopped)
 *
 * For STA mode drivers, it also prints the following extra -
 *      - ESSID
 *      - BSSID
 *      - Channel
 *      - Region code
 *      - Multicast count
 *      - Multicast addresses
 */
static ssize_t
mwifiex_info_read(struct file *file, char __user *ubuf,
          size_t count, loff_t *ppos)
{
    struct mwifiex_private *priv =
        (struct mwifiex_private *) file->private_data;
    struct net_device *netdev = priv->netdev;
    struct netdev_hw_addr *ha;
    unsigned long page = get_zeroed_page(GFP_KERNEL);
    char *p = (char *) page, fmt[64];
    struct mwifiex_bss_info info;
    ssize_t ret;
    int i = 0;

    if (!p)
        return -ENOMEM;

    memset(&info, 0, sizeof(info));
    ret = mwifiex_get_bss_info(priv, &info);
    if (ret)
        goto free_and_exit;

    mwifiex_drv_get_driver_version(priv->adapter, fmt, sizeof(fmt) - 1);

    if (!priv->version_str[0])
        mwifiex_get_ver_ext(priv);

    p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
    p += sprintf(p, "driver_version = %s", fmt);
    p += sprintf(p, "\nverext = %s", priv->version_str);
    p += sprintf(p, "\ninterface_name=\"%s\"\n", netdev->name);
    p += sprintf(p, "bss_mode=\"%s\"\n", bss_modes[info.bss_mode]);
    p += sprintf(p, "media_state=\"%s\"\n",
             (!priv->media_connected ? "Disconnected" : "Connected"));
    p += sprintf(p, "mac_address=\"%pM\"\n", netdev->dev_addr);

    if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
        p += sprintf(p, "multicast_count=\"%d\"\n",
                 netdev_mc_count(netdev));
        p += sprintf(p, "essid=\"%s\"\n", info.ssid.ssid);
        p += sprintf(p, "bssid=\"%pM\"\n", info.bssid);
        p += sprintf(p, "channel=\"%d\"\n", (int) info.bss_chan);
        p += sprintf(p, "country_code = \"%s\"\n", info.country_code);

        netdev_for_each_mc_addr(ha, netdev)
            p += sprintf(p, "multicast_address[%d]=\"%pM\"\n",
                    i++, ha->addr);
    }

    p += sprintf(p, "num_tx_bytes = %lu\n", priv->stats.tx_bytes);
    p += sprintf(p, "num_rx_bytes = %lu\n", priv->stats.rx_bytes);
    p += sprintf(p, "num_tx_pkts = %lu\n", priv->stats.tx_packets);
    p += sprintf(p, "num_rx_pkts = %lu\n", priv->stats.rx_packets);
    p += sprintf(p, "num_tx_pkts_dropped = %lu\n", priv->stats.tx_dropped);
    p += sprintf(p, "num_rx_pkts_dropped = %lu\n", priv->stats.rx_dropped);
    p += sprintf(p, "num_tx_pkts_err = %lu\n", priv->stats.tx_errors);
    p += sprintf(p, "num_rx_pkts_err = %lu\n", priv->stats.rx_errors);
    p += sprintf(p, "carrier %s\n", ((netif_carrier_ok(priv->netdev))
                     ? "on" : "off"));
    p += sprintf(p, "tx queue %s\n", ((netif_queue_stopped(priv->netdev))
                      ? "stopped" : "started"));

    ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
                      (unsigned long) p - page);

free_and_exit:
    free_page(page);
    return ret;
}

/*
 * Proc getlog file read handler.
 *
 * This function is called when the 'getlog' file is opened for reading
 * It prints the following log information -
 *      - Number of multicast Tx frames
 *      - Number of failed packets
 *      - Number of Tx retries
 *      - Number of multicast Tx retries
 *      - Number of duplicate frames
 *      - Number of RTS successes
 *      - Number of RTS failures
 *      - Number of ACK failures
 *      - Number of fragmented Rx frames
 *      - Number of multicast Rx frames
 *      - Number of FCS errors
 *      - Number of Tx frames
 *      - WEP ICV error counts
 */
static ssize_t
mwifiex_getlog_read(struct file *file, char __user *ubuf,
            size_t count, loff_t *ppos)
{
    struct mwifiex_private *priv =
        (struct mwifiex_private *) file->private_data;
    unsigned long page = get_zeroed_page(GFP_KERNEL);
    char *p = (char *) page;
    ssize_t ret;
    struct mwifiex_ds_get_stats stats;

    if (!p)
        return -ENOMEM;

    memset(&stats, 0, sizeof(stats));
    ret = mwifiex_get_stats_info(priv, &stats);
    if (ret)
        goto free_and_exit;

    p += sprintf(p, "\n"
             "mcasttxframe     %u\n"
             "failed           %u\n"
             "retry            %u\n"
             "multiretry       %u\n"
             "framedup         %u\n"
             "rtssuccess       %u\n"
             "rtsfailure       %u\n"
             "ackfailure       %u\n"
             "rxfrag           %u\n"
             "mcastrxframe     %u\n"
             "fcserror         %u\n"
             "txframe          %u\n"
             "wepicverrcnt-1   %u\n"
             "wepicverrcnt-2   %u\n"
             "wepicverrcnt-3   %u\n"
             "wepicverrcnt-4   %u\n",
             stats.mcast_tx_frame,
             stats.failed,
             stats.retry,
             stats.multi_retry,
             stats.frame_dup,
             stats.rts_success,
             stats.rts_failure,
             stats.ack_failure,
             stats.rx_frag,
             stats.mcast_rx_frame,
             stats.fcs_error,
             stats.tx_frame,
             stats.wep_icv_error[0],
             stats.wep_icv_error[1],
             stats.wep_icv_error[2],
             stats.wep_icv_error[3]);


    ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
                      (unsigned long) p - page);

free_and_exit:
    free_page(page);
    return ret;
}

static struct mwifiex_debug_info info;

/*
 * Proc debug file read handler.
 *
 * This function is called when the 'debug' file is opened for reading
 * It prints the following log information -
 *      - Interrupt count
 *      - WMM AC VO packets count
 *      - WMM AC VI packets count
 *      - WMM AC BE packets count
 *      - WMM AC BK packets count
 *      - Maximum Tx buffer size
 *      - Tx buffer size
 *      - Current Tx buffer size
 *      - Power Save mode
 *      - Power Save state
 *      - Deep Sleep status
 *      - Device wakeup required status
 *      - Number of wakeup tries
 *      - Host Sleep configured status
 *      - Host Sleep activated status
 *      - Number of Tx timeouts
 *      - Number of command timeouts
 *      - Last timed out command ID
 *      - Last timed out command action
 *      - Last command ID
 *      - Last command action
 *      - Last command index
 *      - Last command response ID
 *      - Last command response index
 *      - Last event
 *      - Last event index
 *      - Number of host to card command failures
 *      - Number of sleep confirm command failures
 *      - Number of host to card data failure
 *      - Number of deauthentication events
 *      - Number of disassociation events
 *      - Number of link lost events
 *      - Number of deauthentication commands
 *      - Number of association success commands
 *      - Number of association failure commands
 *      - Number of commands sent
 *      - Number of data packets sent
 *      - Number of command responses received
 *      - Number of events received
 *      - Tx BA stream table (TID, RA)
 *      - Rx reorder table (TID, TA, Start window, Window size, Buffer)
 */
static ssize_t
mwifiex_debug_read(struct file *file, char __user *ubuf,
           size_t count, loff_t *ppos)
{
    struct mwifiex_private *priv =
        (struct mwifiex_private *) file->private_data;
    struct mwifiex_debug_data *d = &items[0];
    unsigned long page = get_zeroed_page(GFP_KERNEL);
    char *p = (char *) page;
    ssize_t ret;
    size_t size, addr;
    long val;
    int i, j;

    if (!p)
        return -ENOMEM;

    ret = mwifiex_get_debug_info(priv, &info);
    if (ret)
        goto free_and_exit;

    for (i = 0; i < num_of_items; i++) {
        p += sprintf(p, "%s=", d[i].name);

        size = d[i].size / d[i].num;

        if (i < (num_of_items - 3))
            addr = d[i].addr + (size_t) &info;
        else /* The last 3 items are struct mwifiex_adapter variables */
            addr = d[i].addr + (size_t) priv->adapter;

        for (j = 0; j < d[i].num; j++) {
            switch (size) {
            case 1:
                val = *((u8 *) addr);
                break;
            case 2:
                val = *((u16 *) addr);
                break;
            case 4:
                val = *((u32 *) addr);
                break;
            case 8:
                val = *((long long *) addr);
                break;
            default:
                val = -1;
                break;
            }

            p += sprintf(p, "%#lx ", val);
            addr += size;
        }

        p += sprintf(p, "\n");
    }

    if (info.tx_tbl_num) {
        p += sprintf(p, "Tx BA stream table:\n");
        for (i = 0; i < info.tx_tbl_num; i++)
            p += sprintf(p, "tid = %d, ra = %pM\n",
                     info.tx_tbl[i].tid, info.tx_tbl[i].ra);
    }

    if (info.rx_tbl_num) {
        p += sprintf(p, "Rx reorder table:\n");
        for (i = 0; i < info.rx_tbl_num; i++) {
            p += sprintf(p, "tid = %d, ta = %pM, "
                     "start_win = %d, "
                     "win_size = %d, buffer: ",
                     info.rx_tbl[i].tid,
                     info.rx_tbl[i].ta,
                     info.rx_tbl[i].start_win,
                     info.rx_tbl[i].win_size);

            for (j = 0; j < info.rx_tbl[i].win_size; j++)
                p += sprintf(p, "%c ",
                         info.rx_tbl[i].buffer[j] ?
                         '1' : '0');

            p += sprintf(p, "\n");
        }
    }

    ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
                      (unsigned long) p - page);

free_and_exit:
    free_page(page);
    return ret;
}

static u32 saved_reg_type, saved_reg_offset, saved_reg_value;

/*
 * Proc regrdwr file write handler.
 *
 * This function is called when the 'regrdwr' file is opened for writing
 *
 * This function can be used to write to a register.
 */
static ssize_t
mwifiex_regrdwr_write(struct file *file,
              const char __user *ubuf, size_t count, loff_t *ppos)
{
    unsigned long addr = get_zeroed_page(GFP_KERNEL);
    char *buf = (char *) addr;
    size_t buf_size = min(count, (size_t) (PAGE_SIZE - 1));
    int ret;
    u32 reg_type = 0, reg_offset = 0, reg_value = UINT_MAX;

    if (!buf)
        return -ENOMEM;


    if (copy_from_user(buf, ubuf, buf_size)) {
        ret = -EFAULT;
        goto done;
    }

    sscanf(buf, "%u %x %x", &reg_type, &reg_offset, &reg_value);

    if (reg_type == 0 || reg_offset == 0) {
        ret = -EINVAL;
        goto done;
    } else {
        saved_reg_type = reg_type;
        saved_reg_offset = reg_offset;
        saved_reg_value = reg_value;
        ret = count;
    }
done:
    free_page(addr);
    return ret;
}

/*
 * Proc regrdwr file read handler.
 *
 * This function is called when the 'regrdwr' file is opened for reading
 *
 * This function can be used to read from a register.
 */
static ssize_t
mwifiex_regrdwr_read(struct file *file, char __user *ubuf,
             size_t count, loff_t *ppos)
{
    struct mwifiex_private *priv =
        (struct mwifiex_private *) file->private_data;
    unsigned long addr = get_zeroed_page(GFP_KERNEL);
    char *buf = (char *) addr;
    int pos = 0, ret = 0;
    u32 reg_value;

    if (!buf)
        return -ENOMEM;

    if (!saved_reg_type) {
        /* No command has been given */
        pos += snprintf(buf, PAGE_SIZE, "0");
        goto done;
    }
    /* Set command has been given */
    if (saved_reg_value != UINT_MAX) {
        ret = mwifiex_reg_write(priv, saved_reg_type, saved_reg_offset,
                    saved_reg_value);

        pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n",
                saved_reg_type, saved_reg_offset,
                saved_reg_value);

        ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);

        goto done;
    }
    /* Get command has been given */
    ret = mwifiex_reg_read(priv, saved_reg_type,
                   saved_reg_offset, &reg_value);
    if (ret) {
        ret = -EINVAL;
        goto done;
    }

    pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n", saved_reg_type,
            saved_reg_offset, reg_value);

    ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);

done:
    free_page(addr);
    return ret;
}

static u32 saved_offset = -1, saved_bytes = -1;

/*
 * Proc rdeeprom file write handler.
 *
 * This function is called when the 'rdeeprom' file is opened for writing
 *
 * This function can be used to write to a RDEEPROM location.
 */
static ssize_t
mwifiex_rdeeprom_write(struct file *file,
               const char __user *ubuf, size_t count, loff_t *ppos)
{
    unsigned long addr = get_zeroed_page(GFP_KERNEL);
    char *buf = (char *) addr;
    size_t buf_size = min(count, (size_t) (PAGE_SIZE - 1));
    int ret = 0;
    int offset = -1, bytes = -1;

    if (!buf)
        return -ENOMEM;


    if (copy_from_user(buf, ubuf, buf_size)) {
        ret = -EFAULT;
        goto done;
    }

    sscanf(buf, "%d %d", &offset, &bytes);

    if (offset == -1 || bytes == -1) {
        ret = -EINVAL;
        goto done;
    } else {
        saved_offset = offset;
        saved_bytes = bytes;
        ret = count;
    }
done:
    free_page(addr);
    return ret;
}

/*
 * Proc rdeeprom read write handler.
 *
 * This function is called when the 'rdeeprom' file is opened for reading
 *
 * This function can be used to read from a RDEEPROM location.
 */
static ssize_t
mwifiex_rdeeprom_read(struct file *file, char __user *ubuf,
              size_t count, loff_t *ppos)
{
    struct mwifiex_private *priv =
        (struct mwifiex_private *) file->private_data;
    unsigned long addr = get_zeroed_page(GFP_KERNEL);
    char *buf = (char *) addr;
    int pos = 0, ret = 0, i;
    u8 value[MAX_EEPROM_DATA];

    if (!buf)
        return -ENOMEM;

    if (saved_offset == -1) {
        /* No command has been given */
        pos += snprintf(buf, PAGE_SIZE, "0");
        goto done;
    }

    /* Get command has been given */
    ret = mwifiex_eeprom_read(priv, (u16) saved_offset,
                  (u16) saved_bytes, value);
    if (ret) {
        ret = -EINVAL;
        goto done;
    }

    pos += snprintf(buf, PAGE_SIZE, "%d %d ", saved_offset, saved_bytes);

    for (i = 0; i < saved_bytes; i++)
        pos += snprintf(buf + strlen(buf), PAGE_SIZE, "%d ", value[i]);

    ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);

done:
    free_page(addr);
    return ret;
}


#define MWIFIEX_DFS_ADD_FILE(name) do {                                 \
    if (!debugfs_create_file(#name, 0644, priv->dfs_dev_dir,        \
            priv, &mwifiex_dfs_##name##_fops))              \
        return;                                                 \
} while (0);

#define MWIFIEX_DFS_FILE_OPS(name)                                      \
static const struct file_operations mwifiex_dfs_##name##_fops = {       \
    .read = mwifiex_##name##_read,                                  \
    .write = mwifiex_##name##_write,                                \
    .open = simple_open,                                            \
};

#define MWIFIEX_DFS_FILE_READ_OPS(name)                                 \
static const struct file_operations mwifiex_dfs_##name##_fops = {       \
    .read = mwifiex_##name##_read,                                  \
    .open = simple_open,                                            \
};

#define MWIFIEX_DFS_FILE_WRITE_OPS(name)                                \
static const struct file_operations mwifiex_dfs_##name##_fops = {       \
    .write = mwifiex_##name##_write,                                \
    .open = simple_open,                                            \
};


MWIFIEX_DFS_FILE_READ_OPS(info);
MWIFIEX_DFS_FILE_READ_OPS(debug);
MWIFIEX_DFS_FILE_READ_OPS(getlog);
MWIFIEX_DFS_FILE_OPS(regrdwr);
MWIFIEX_DFS_FILE_OPS(rdeeprom);

/*
 * This function creates the debug FS directory structure and the files.
 */
void
mwifiex_dev_debugfs_init(struct mwifiex_private *priv)
{
    if (!mwifiex_dfs_dir || !priv)
        return;

    priv->dfs_dev_dir = debugfs_create_dir(priv->netdev->name,
                           mwifiex_dfs_dir);

    if (!priv->dfs_dev_dir)
        return;

    MWIFIEX_DFS_ADD_FILE(info);
    MWIFIEX_DFS_ADD_FILE(debug);
    MWIFIEX_DFS_ADD_FILE(getlog);
    MWIFIEX_DFS_ADD_FILE(regrdwr);
    MWIFIEX_DFS_ADD_FILE(rdeeprom);
}

/*
 * This function removes the debug FS directory structure and the files.
 */
void
mwifiex_dev_debugfs_remove(struct mwifiex_private *priv)
{
    if (!priv)
        return;

    debugfs_remove_recursive(priv->dfs_dev_dir);
}

/*
 * This function creates the top level proc directory.
 */
void
mwifiex_debugfs_init(void)
{
    if (!mwifiex_dfs_dir)
        mwifiex_dfs_dir = debugfs_create_dir("mwifiex", NULL);
}

/*
 * This function removes the top level proc directory.
 */
void
mwifiex_debugfs_remove(void)
{
    if (mwifiex_dfs_dir)
        debugfs_remove(mwifiex_dfs_dir);
}