wireless: mwifiex: initial commit for Marvell mwifiex driver

[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / mwifiex / debugfs.c

/*
 * 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",
        "Managed",
        "Ad-hoc",
        "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 */
        {"ioctl_pending", adapter_item_size(ioctl_pending),
         adapter_item_addr(ioctl_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);

/*
 * Generic proc file open handler.
 *
 * This function is called every time a file is accessed for read or write.
 */
static int
mwifiex_open_generic(struct inode *inode, struct file *file)
{
        file->private_data = inode->i_private;
        return 0;
}

/*
 * 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 = 0;
        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=\"%02x:%02x:%02x:%02x:%02x:%02x\"\n",
                     netdev->dev_addr[0], netdev->dev_addr[1],
                     netdev->dev_addr[2], netdev->dev_addr[3],
                     netdev->dev_addr[4], netdev->dev_addr[5]);

        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=\"%02x:%02x:%02x:%02x:%02x:%02x\"\n",
                             info.bssid[0], info.bssid[1],
                             info.bssid[2], info.bssid[3],
                             info.bssid[4], info.bssid[5]);
                p += sprintf(p, "channel=\"%d\"\n", (int) info.bss_chan);
                p += sprintf(p, "region_code = \"%02x\"\n", info.region_code);

                netdev_for_each_mc_addr(ha, netdev)
                        p += sprintf(p, "multicast_address[%d]="
                                     "\"%02x:%02x:%02x:%02x:%02x:%02x\"\n", i++,
                                     ha->addr[0], ha->addr[1],
                                     ha->addr[2], ha->addr[3],
                                     ha->addr[4], ha->addr[5]);
        }

        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 = 0;
        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 = 0;
        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 = %02x:%02x:%02x:%02x:%02x:%02x\n",
                                     info.tx_tbl[i].tid, info.tx_tbl[i].ra[0],
                                     info.tx_tbl[i].ra[1], info.tx_tbl[i].ra[2],
                                     info.tx_tbl[i].ra[3], info.tx_tbl[i].ra[4],
                                     info.tx_tbl[i].ra[5]);
        }

        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 = %02x:%02x:%02x:%02x:%02x:%02x, "
                                     "start_win = %d, "
                                     "win_size = %d, buffer: ",
                                     info.rx_tbl[i].tid,
                                     info.rx_tbl[i].ta[0], info.rx_tbl[i].ta[1],
                                     info.rx_tbl[i].ta[2], info.rx_tbl[i].ta[3],
                                     info.rx_tbl[i].ta[4], info.rx_tbl[i].ta[5],
                                     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 = 0;
        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 = 0;
        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 = mwifiex_open_generic,                                   \
};

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

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


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);

        return;
}

/*
 * 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);
        return;
}

/*
 * 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);
}