debugfs.c

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/*
 * This file is part of wl1271
 *
 * Copyright (C) 2009 Nokia Corporation
 *
 * Contact: Luciano Coelho <[email protected]>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include "debugfs.h"

#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/module.h>

#include "wlcore.h"
#include "debug.h"
#include "acx.h"
#include "ps.h"
#include "io.h"
#include "tx.h"
#include "hw_ops.h"

/* ms */
#define WL1271_DEBUGFS_STATS_LIFETIME 1000

#define WLCORE_MAX_BLOCK_SIZE ((size_t)(4*PAGE_SIZE))

/* debugfs macros idea from mac80211 */
int wl1271_format_buffer(char __user *userbuf, size_t count,
             loff_t *ppos, char *fmt, ...)
{
    va_list args;
    char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
    int res;

    va_start(args, fmt);
    res = vscnprintf(buf, sizeof(buf), fmt, args);
    va_end(args);

    return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
EXPORT_SYMBOL_GPL(wl1271_format_buffer);

void wl1271_debugfs_update_stats(struct wl1271 *wl)
{
    int ret;

    mutex_lock(&wl->mutex);

    if (unlikely(wl->state != WLCORE_STATE_ON))
        goto out;

    ret = wl1271_ps_elp_wakeup(wl);
    if (ret < 0)
        goto out;

    if (!wl->plt &&
        time_after(jiffies, wl->stats.fw_stats_update +
               msecs_to_jiffies(WL1271_DEBUGFS_STATS_LIFETIME))) {
        wl1271_acx_statistics(wl, wl->stats.fw_stats);
        wl->stats.fw_stats_update = jiffies;
    }

    wl1271_ps_elp_sleep(wl);

out:
    mutex_unlock(&wl->mutex);
}
EXPORT_SYMBOL_GPL(wl1271_debugfs_update_stats);

DEBUGFS_READONLY_FILE(retry_count, "%u", wl->stats.retry_count);
DEBUGFS_READONLY_FILE(excessive_retries, "%u",
              wl->stats.excessive_retries);

static ssize_t tx_queue_len_read(struct file *file, char __user *userbuf,
                 size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    u32 queue_len;
    char buf[20];
    int res;

    queue_len = wl1271_tx_total_queue_count(wl);

    res = scnprintf(buf, sizeof(buf), "%u\n", queue_len);
    return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}

static const struct file_operations tx_queue_len_ops = {
    .read = tx_queue_len_read,
    .open = simple_open,
    .llseek = default_llseek,
};

static void chip_op_handler(struct wl1271 *wl, unsigned long value,
                void *arg)
{
    int ret;
    int (*chip_op) (struct wl1271 *wl);

    if (!arg) {
        wl1271_warning("debugfs chip_op_handler with no callback");
        return;
    }

    ret = wl1271_ps_elp_wakeup(wl);
    if (ret < 0)
        return;

    chip_op = arg;
    chip_op(wl);

    wl1271_ps_elp_sleep(wl);
}


static inline void no_write_handler(struct wl1271 *wl,
                    unsigned long value,
                    unsigned long param)
{
}

#define WL12XX_CONF_DEBUGFS(param, conf_sub_struct,         \
                min_val, max_val, write_handler_locked, \
                write_handler_arg)              \
    static ssize_t param##_read(struct file *file,          \
                      char __user *user_buf,        \
                      size_t count, loff_t *ppos)   \
    {                               \
    struct wl1271 *wl = file->private_data;             \
    return wl1271_format_buffer(user_buf, count,            \
                    ppos, "%d\n",           \
                    wl->conf.conf_sub_struct.param);    \
    }                               \
                                    \
    static ssize_t param##_write(struct file *file,         \
                     const char __user *user_buf,   \
                     size_t count, loff_t *ppos)    \
    {                               \
    struct wl1271 *wl = file->private_data;             \
    unsigned long value;                        \
    int ret;                            \
                                    \
    ret = kstrtoul_from_user(user_buf, count, 10, &value);      \
    if (ret < 0) {                          \
        wl1271_warning("illegal value for " #param);        \
        return -EINVAL;                     \
    }                               \
                                    \
    if (value < min_val || value > max_val) {           \
        wl1271_warning(#param " is not in valid range");    \
        return -ERANGE;                     \
    }                               \
                                    \
    mutex_lock(&wl->mutex);                     \
    wl->conf.conf_sub_struct.param = value;             \
                                    \
    write_handler_locked(wl, value, write_handler_arg);     \
                                    \
    mutex_unlock(&wl->mutex);                   \
    return count;                           \
    }                               \
                                    \
    static const struct file_operations param##_ops = {     \
        .read = param##_read,                   \
        .write = param##_write,                 \
        .open = simple_open,                    \
        .llseek = default_llseek,               \
    };

WL12XX_CONF_DEBUGFS(irq_pkt_threshold, rx, 0, 65535,
            chip_op_handler, wl1271_acx_init_rx_interrupt)
WL12XX_CONF_DEBUGFS(irq_blk_threshold, rx, 0, 65535,
            chip_op_handler, wl1271_acx_init_rx_interrupt)
WL12XX_CONF_DEBUGFS(irq_timeout, rx, 0, 100,
            chip_op_handler, wl1271_acx_init_rx_interrupt)

static ssize_t gpio_power_read(struct file *file, char __user *user_buf,
              size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    bool state = test_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);

    int res;
    char buf[10];

    res = scnprintf(buf, sizeof(buf), "%d\n", state);

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

static ssize_t gpio_power_write(struct file *file,
               const char __user *user_buf,
               size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    unsigned long value;
    int ret;

    ret = kstrtoul_from_user(user_buf, count, 10, &value);
    if (ret < 0) {
        wl1271_warning("illegal value in gpio_power");
        return -EINVAL;
    }

    mutex_lock(&wl->mutex);

    if (value)
        wl1271_power_on(wl);
    else
        wl1271_power_off(wl);

    mutex_unlock(&wl->mutex);
    return count;
}

static const struct file_operations gpio_power_ops = {
    .read = gpio_power_read,
    .write = gpio_power_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t start_recovery_write(struct file *file,
                    const char __user *user_buf,
                    size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;

    mutex_lock(&wl->mutex);
    wl12xx_queue_recovery_work(wl);
    mutex_unlock(&wl->mutex);

    return count;
}

static const struct file_operations start_recovery_ops = {
    .write = start_recovery_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t dynamic_ps_timeout_read(struct file *file, char __user *user_buf,
              size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;

    return wl1271_format_buffer(user_buf, count,
                    ppos, "%d\n",
                    wl->conf.conn.dynamic_ps_timeout);
}

static ssize_t dynamic_ps_timeout_write(struct file *file,
                    const char __user *user_buf,
                    size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    struct wl12xx_vif *wlvif;
    unsigned long value;
    int ret;

    ret = kstrtoul_from_user(user_buf, count, 10, &value);
    if (ret < 0) {
        wl1271_warning("illegal value in dynamic_ps");
        return -EINVAL;
    }

    if (value < 1 || value > 65535) {
        wl1271_warning("dyanmic_ps_timeout is not in valid range");
        return -ERANGE;
    }

    mutex_lock(&wl->mutex);

    wl->conf.conn.dynamic_ps_timeout = value;

    if (unlikely(wl->state != WLCORE_STATE_ON))
        goto out;

    ret = wl1271_ps_elp_wakeup(wl);
    if (ret < 0)
        goto out;

    /* In case we're already in PSM, trigger it again to set new timeout
     * immediately without waiting for re-association
     */

    wl12xx_for_each_wlvif_sta(wl, wlvif) {
        if (test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags))
            wl1271_ps_set_mode(wl, wlvif, STATION_AUTO_PS_MODE);
    }

    wl1271_ps_elp_sleep(wl);

out:
    mutex_unlock(&wl->mutex);
    return count;
}

static const struct file_operations dynamic_ps_timeout_ops = {
    .read = dynamic_ps_timeout_read,
    .write = dynamic_ps_timeout_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t forced_ps_read(struct file *file, char __user *user_buf,
              size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;

    return wl1271_format_buffer(user_buf, count,
                    ppos, "%d\n",
                    wl->conf.conn.forced_ps);
}

static ssize_t forced_ps_write(struct file *file,
                    const char __user *user_buf,
                    size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    struct wl12xx_vif *wlvif;
    unsigned long value;
    int ret, ps_mode;

    ret = kstrtoul_from_user(user_buf, count, 10, &value);
    if (ret < 0) {
        wl1271_warning("illegal value in forced_ps");
        return -EINVAL;
    }

    if (value != 1 && value != 0) {
        wl1271_warning("forced_ps should be either 0 or 1");
        return -ERANGE;
    }

    mutex_lock(&wl->mutex);

    if (wl->conf.conn.forced_ps == value)
        goto out;

    wl->conf.conn.forced_ps = value;

    if (unlikely(wl->state != WLCORE_STATE_ON))
        goto out;

    ret = wl1271_ps_elp_wakeup(wl);
    if (ret < 0)
        goto out;

    /* In case we're already in PSM, trigger it again to switch mode
     * immediately without waiting for re-association
     */

    ps_mode = value ? STATION_POWER_SAVE_MODE : STATION_AUTO_PS_MODE;

    wl12xx_for_each_wlvif_sta(wl, wlvif) {
        if (test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags))
            wl1271_ps_set_mode(wl, wlvif, ps_mode);
    }

    wl1271_ps_elp_sleep(wl);

out:
    mutex_unlock(&wl->mutex);
    return count;
}

static const struct file_operations forced_ps_ops = {
    .read = forced_ps_read,
    .write = forced_ps_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t split_scan_timeout_read(struct file *file, char __user *user_buf,
              size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;

    return wl1271_format_buffer(user_buf, count,
                    ppos, "%d\n",
                    wl->conf.scan.split_scan_timeout / 1000);
}

static ssize_t split_scan_timeout_write(struct file *file,
                    const char __user *user_buf,
                    size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    unsigned long value;
    int ret;

    ret = kstrtoul_from_user(user_buf, count, 10, &value);
    if (ret < 0) {
        wl1271_warning("illegal value in split_scan_timeout");
        return -EINVAL;
    }

    if (value == 0)
        wl1271_info("split scan will be disabled");

    mutex_lock(&wl->mutex);

    wl->conf.scan.split_scan_timeout = value * 1000;

    mutex_unlock(&wl->mutex);
    return count;
}

static const struct file_operations split_scan_timeout_ops = {
    .read = split_scan_timeout_read,
    .write = split_scan_timeout_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t driver_state_read(struct file *file, char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    int res = 0;
    ssize_t ret;
    char *buf;

#define DRIVER_STATE_BUF_LEN 1024

    buf = kmalloc(DRIVER_STATE_BUF_LEN, GFP_KERNEL);
    if (!buf)
        return -ENOMEM;

    mutex_lock(&wl->mutex);

#define DRIVER_STATE_PRINT(x, fmt)   \
    (res += scnprintf(buf + res, DRIVER_STATE_BUF_LEN - res,\
              #x " = " fmt "\n", wl->x))

#define DRIVER_STATE_PRINT_LONG(x) DRIVER_STATE_PRINT(x, "%ld")
#define DRIVER_STATE_PRINT_INT(x)  DRIVER_STATE_PRINT(x, "%d")
#define DRIVER_STATE_PRINT_STR(x)  DRIVER_STATE_PRINT(x, "%s")
#define DRIVER_STATE_PRINT_LHEX(x) DRIVER_STATE_PRINT(x, "0x%lx")
#define DRIVER_STATE_PRINT_HEX(x)  DRIVER_STATE_PRINT(x, "0x%x")

    DRIVER_STATE_PRINT_INT(tx_blocks_available);
    DRIVER_STATE_PRINT_INT(tx_allocated_blocks);
    DRIVER_STATE_PRINT_INT(tx_allocated_pkts[0]);
    DRIVER_STATE_PRINT_INT(tx_allocated_pkts[1]);
    DRIVER_STATE_PRINT_INT(tx_allocated_pkts[2]);
    DRIVER_STATE_PRINT_INT(tx_allocated_pkts[3]);
    DRIVER_STATE_PRINT_INT(tx_frames_cnt);
    DRIVER_STATE_PRINT_LHEX(tx_frames_map[0]);
    DRIVER_STATE_PRINT_INT(tx_queue_count[0]);
    DRIVER_STATE_PRINT_INT(tx_queue_count[1]);
    DRIVER_STATE_PRINT_INT(tx_queue_count[2]);
    DRIVER_STATE_PRINT_INT(tx_queue_count[3]);
    DRIVER_STATE_PRINT_INT(tx_packets_count);
    DRIVER_STATE_PRINT_INT(tx_results_count);
    DRIVER_STATE_PRINT_LHEX(flags);
    DRIVER_STATE_PRINT_INT(tx_blocks_freed);
    DRIVER_STATE_PRINT_INT(rx_counter);
    DRIVER_STATE_PRINT_INT(state);
    DRIVER_STATE_PRINT_INT(channel);
    DRIVER_STATE_PRINT_INT(band);
    DRIVER_STATE_PRINT_INT(power_level);
    DRIVER_STATE_PRINT_INT(sg_enabled);
    DRIVER_STATE_PRINT_INT(enable_11a);
    DRIVER_STATE_PRINT_INT(noise);
    DRIVER_STATE_PRINT_HEX(ap_fw_ps_map);
    DRIVER_STATE_PRINT_LHEX(ap_ps_map);
    DRIVER_STATE_PRINT_HEX(quirks);
    DRIVER_STATE_PRINT_HEX(irq);
    /* TODO: ref_clock and tcxo_clock were moved to wl12xx priv */
    DRIVER_STATE_PRINT_HEX(hw_pg_ver);
    DRIVER_STATE_PRINT_HEX(platform_quirks);
    DRIVER_STATE_PRINT_HEX(chip.id);
    DRIVER_STATE_PRINT_STR(chip.fw_ver_str);
    DRIVER_STATE_PRINT_STR(chip.phy_fw_ver_str);
    DRIVER_STATE_PRINT_INT(sched_scanning);

#undef DRIVER_STATE_PRINT_INT
#undef DRIVER_STATE_PRINT_LONG
#undef DRIVER_STATE_PRINT_HEX
#undef DRIVER_STATE_PRINT_LHEX
#undef DRIVER_STATE_PRINT_STR
#undef DRIVER_STATE_PRINT
#undef DRIVER_STATE_BUF_LEN

    mutex_unlock(&wl->mutex);

    ret = simple_read_from_buffer(user_buf, count, ppos, buf, res);
    kfree(buf);
    return ret;
}

static const struct file_operations driver_state_ops = {
    .read = driver_state_read,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t vifs_state_read(struct file *file, char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    struct wl12xx_vif *wlvif;
    int ret, res = 0;
    const int buf_size = 4096;
    char *buf;
    char tmp_buf[64];

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

    mutex_lock(&wl->mutex);

#define VIF_STATE_PRINT(x, fmt)             \
    (res += scnprintf(buf + res, buf_size - res,    \
              #x " = " fmt "\n", wlvif->x))

#define VIF_STATE_PRINT_LONG(x)  VIF_STATE_PRINT(x, "%ld")
#define VIF_STATE_PRINT_INT(x)   VIF_STATE_PRINT(x, "%d")
#define VIF_STATE_PRINT_STR(x)   VIF_STATE_PRINT(x, "%s")
#define VIF_STATE_PRINT_LHEX(x)  VIF_STATE_PRINT(x, "0x%lx")
#define VIF_STATE_PRINT_LLHEX(x) VIF_STATE_PRINT(x, "0x%llx")
#define VIF_STATE_PRINT_HEX(x)   VIF_STATE_PRINT(x, "0x%x")

#define VIF_STATE_PRINT_NSTR(x, len)                \
    do {                            \
        memset(tmp_buf, 0, sizeof(tmp_buf));        \
        memcpy(tmp_buf, wlvif->x,           \
               min_t(u8, len, sizeof(tmp_buf) - 1));    \
        res += scnprintf(buf + res, buf_size - res, \
                 #x " = %s\n", tmp_buf);    \
    } while (0)

    wl12xx_for_each_wlvif(wl, wlvif) {
        VIF_STATE_PRINT_INT(role_id);
        VIF_STATE_PRINT_INT(bss_type);
        VIF_STATE_PRINT_LHEX(flags);
        VIF_STATE_PRINT_INT(p2p);
        VIF_STATE_PRINT_INT(dev_role_id);
        VIF_STATE_PRINT_INT(dev_hlid);

        if (wlvif->bss_type == BSS_TYPE_STA_BSS ||
            wlvif->bss_type == BSS_TYPE_IBSS) {
            VIF_STATE_PRINT_INT(sta.hlid);
            VIF_STATE_PRINT_INT(sta.ba_rx_bitmap);
            VIF_STATE_PRINT_INT(sta.basic_rate_idx);
            VIF_STATE_PRINT_INT(sta.ap_rate_idx);
            VIF_STATE_PRINT_INT(sta.p2p_rate_idx);
            VIF_STATE_PRINT_INT(sta.qos);
        } else {
            VIF_STATE_PRINT_INT(ap.global_hlid);
            VIF_STATE_PRINT_INT(ap.bcast_hlid);
            VIF_STATE_PRINT_LHEX(ap.sta_hlid_map[0]);
            VIF_STATE_PRINT_INT(ap.mgmt_rate_idx);
            VIF_STATE_PRINT_INT(ap.bcast_rate_idx);
            VIF_STATE_PRINT_INT(ap.ucast_rate_idx[0]);
            VIF_STATE_PRINT_INT(ap.ucast_rate_idx[1]);
            VIF_STATE_PRINT_INT(ap.ucast_rate_idx[2]);
            VIF_STATE_PRINT_INT(ap.ucast_rate_idx[3]);
        }
        VIF_STATE_PRINT_INT(last_tx_hlid);
        VIF_STATE_PRINT_LHEX(links_map[0]);
        VIF_STATE_PRINT_NSTR(ssid, wlvif->ssid_len);
        VIF_STATE_PRINT_INT(band);
        VIF_STATE_PRINT_INT(channel);
        VIF_STATE_PRINT_HEX(bitrate_masks[0]);
        VIF_STATE_PRINT_HEX(bitrate_masks[1]);
        VIF_STATE_PRINT_HEX(basic_rate_set);
        VIF_STATE_PRINT_HEX(basic_rate);
        VIF_STATE_PRINT_HEX(rate_set);
        VIF_STATE_PRINT_INT(beacon_int);
        VIF_STATE_PRINT_INT(default_key);
        VIF_STATE_PRINT_INT(aid);
        VIF_STATE_PRINT_INT(session_counter);
        VIF_STATE_PRINT_INT(psm_entry_retry);
        VIF_STATE_PRINT_INT(power_level);
        VIF_STATE_PRINT_INT(rssi_thold);
        VIF_STATE_PRINT_INT(last_rssi_event);
        VIF_STATE_PRINT_INT(ba_support);
        VIF_STATE_PRINT_INT(ba_allowed);
        VIF_STATE_PRINT_LLHEX(tx_security_seq);
        VIF_STATE_PRINT_INT(tx_security_last_seq_lsb);
    }

#undef VIF_STATE_PRINT_INT
#undef VIF_STATE_PRINT_LONG
#undef VIF_STATE_PRINT_HEX
#undef VIF_STATE_PRINT_LHEX
#undef VIF_STATE_PRINT_LLHEX
#undef VIF_STATE_PRINT_STR
#undef VIF_STATE_PRINT_NSTR
#undef VIF_STATE_PRINT

    mutex_unlock(&wl->mutex);

    ret = simple_read_from_buffer(user_buf, count, ppos, buf, res);
    kfree(buf);
    return ret;
}

static const struct file_operations vifs_state_ops = {
    .read = vifs_state_read,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t dtim_interval_read(struct file *file, char __user *user_buf,
                  size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    u8 value;

    if (wl->conf.conn.wake_up_event == CONF_WAKE_UP_EVENT_DTIM ||
        wl->conf.conn.wake_up_event == CONF_WAKE_UP_EVENT_N_DTIM)
        value = wl->conf.conn.listen_interval;
    else
        value = 0;

    return wl1271_format_buffer(user_buf, count, ppos, "%d\n", value);
}

static ssize_t dtim_interval_write(struct file *file,
                   const char __user *user_buf,
                   size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    unsigned long value;
    int ret;

    ret = kstrtoul_from_user(user_buf, count, 10, &value);
    if (ret < 0) {
        wl1271_warning("illegal value for dtim_interval");
        return -EINVAL;
    }

    if (value < 1 || value > 10) {
        wl1271_warning("dtim value is not in valid range");
        return -ERANGE;
    }

    mutex_lock(&wl->mutex);

    wl->conf.conn.listen_interval = value;
    /* for some reason there are different event types for 1 and >1 */
    if (value == 1)
        wl->conf.conn.wake_up_event = CONF_WAKE_UP_EVENT_DTIM;
    else
        wl->conf.conn.wake_up_event = CONF_WAKE_UP_EVENT_N_DTIM;

    /*
     * we don't reconfigure ACX_WAKE_UP_CONDITIONS now, so it will only
     * take effect on the next time we enter psm.
     */
    mutex_unlock(&wl->mutex);
    return count;
}

static const struct file_operations dtim_interval_ops = {
    .read = dtim_interval_read,
    .write = dtim_interval_write,
    .open = simple_open,
    .llseek = default_llseek,
};



static ssize_t suspend_dtim_interval_read(struct file *file,
                      char __user *user_buf,
                      size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    u8 value;

    if (wl->conf.conn.suspend_wake_up_event == CONF_WAKE_UP_EVENT_DTIM ||
        wl->conf.conn.suspend_wake_up_event == CONF_WAKE_UP_EVENT_N_DTIM)
        value = wl->conf.conn.suspend_listen_interval;
    else
        value = 0;

    return wl1271_format_buffer(user_buf, count, ppos, "%d\n", value);
}

static ssize_t suspend_dtim_interval_write(struct file *file,
                       const char __user *user_buf,
                       size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    unsigned long value;
    int ret;

    ret = kstrtoul_from_user(user_buf, count, 10, &value);
    if (ret < 0) {
        wl1271_warning("illegal value for suspend_dtim_interval");
        return -EINVAL;
    }

    if (value < 1 || value > 10) {
        wl1271_warning("suspend_dtim value is not in valid range");
        return -ERANGE;
    }

    mutex_lock(&wl->mutex);

    wl->conf.conn.suspend_listen_interval = value;
    /* for some reason there are different event types for 1 and >1 */
    if (value == 1)
        wl->conf.conn.suspend_wake_up_event = CONF_WAKE_UP_EVENT_DTIM;
    else
        wl->conf.conn.suspend_wake_up_event = CONF_WAKE_UP_EVENT_N_DTIM;

    mutex_unlock(&wl->mutex);
    return count;
}


static const struct file_operations suspend_dtim_interval_ops = {
    .read = suspend_dtim_interval_read,
    .write = suspend_dtim_interval_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t beacon_interval_read(struct file *file, char __user *user_buf,
                    size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    u8 value;

    if (wl->conf.conn.wake_up_event == CONF_WAKE_UP_EVENT_BEACON ||
        wl->conf.conn.wake_up_event == CONF_WAKE_UP_EVENT_N_BEACONS)
        value = wl->conf.conn.listen_interval;
    else
        value = 0;

    return wl1271_format_buffer(user_buf, count, ppos, "%d\n", value);
}

static ssize_t beacon_interval_write(struct file *file,
                     const char __user *user_buf,
                     size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    unsigned long value;
    int ret;

    ret = kstrtoul_from_user(user_buf, count, 10, &value);
    if (ret < 0) {
        wl1271_warning("illegal value for beacon_interval");
        return -EINVAL;
    }

    if (value < 1 || value > 255) {
        wl1271_warning("beacon interval value is not in valid range");
        return -ERANGE;
    }

    mutex_lock(&wl->mutex);

    wl->conf.conn.listen_interval = value;
    /* for some reason there are different event types for 1 and >1 */
    if (value == 1)
        wl->conf.conn.wake_up_event = CONF_WAKE_UP_EVENT_BEACON;
    else
        wl->conf.conn.wake_up_event = CONF_WAKE_UP_EVENT_N_BEACONS;

    /*
     * we don't reconfigure ACX_WAKE_UP_CONDITIONS now, so it will only
     * take effect on the next time we enter psm.
     */
    mutex_unlock(&wl->mutex);
    return count;
}

static const struct file_operations beacon_interval_ops = {
    .read = beacon_interval_read,
    .write = beacon_interval_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t rx_streaming_interval_write(struct file *file,
               const char __user *user_buf,
               size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    struct wl12xx_vif *wlvif;
    unsigned long value;
    int ret;

    ret = kstrtoul_from_user(user_buf, count, 10, &value);
    if (ret < 0) {
        wl1271_warning("illegal value in rx_streaming_interval!");
        return -EINVAL;
    }

    /* valid values: 0, 10-100 */
    if (value && (value < 10 || value > 100)) {
        wl1271_warning("value is not in range!");
        return -ERANGE;
    }

    mutex_lock(&wl->mutex);

    wl->conf.rx_streaming.interval = value;

    ret = wl1271_ps_elp_wakeup(wl);
    if (ret < 0)
        goto out;

    wl12xx_for_each_wlvif_sta(wl, wlvif) {
        wl1271_recalc_rx_streaming(wl, wlvif);
    }

    wl1271_ps_elp_sleep(wl);
out:
    mutex_unlock(&wl->mutex);
    return count;
}

static ssize_t rx_streaming_interval_read(struct file *file,
                char __user *userbuf,
                size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    return wl1271_format_buffer(userbuf, count, ppos,
                    "%d\n", wl->conf.rx_streaming.interval);
}

static const struct file_operations rx_streaming_interval_ops = {
    .read = rx_streaming_interval_read,
    .write = rx_streaming_interval_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t rx_streaming_always_write(struct file *file,
               const char __user *user_buf,
               size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    struct wl12xx_vif *wlvif;
    unsigned long value;
    int ret;

    ret = kstrtoul_from_user(user_buf, count, 10, &value);
    if (ret < 0) {
        wl1271_warning("illegal value in rx_streaming_write!");
        return -EINVAL;
    }

    /* valid values: 0, 10-100 */
    if (!(value == 0 || value == 1)) {
        wl1271_warning("value is not in valid!");
        return -EINVAL;
    }

    mutex_lock(&wl->mutex);

    wl->conf.rx_streaming.always = value;

    ret = wl1271_ps_elp_wakeup(wl);
    if (ret < 0)
        goto out;

    wl12xx_for_each_wlvif_sta(wl, wlvif) {
        wl1271_recalc_rx_streaming(wl, wlvif);
    }

    wl1271_ps_elp_sleep(wl);
out:
    mutex_unlock(&wl->mutex);
    return count;
}

static ssize_t rx_streaming_always_read(struct file *file,
                char __user *userbuf,
                size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    return wl1271_format_buffer(userbuf, count, ppos,
                    "%d\n", wl->conf.rx_streaming.always);
}

static const struct file_operations rx_streaming_always_ops = {
    .read = rx_streaming_always_read,
    .write = rx_streaming_always_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t beacon_filtering_write(struct file *file,
                      const char __user *user_buf,
                      size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    struct wl12xx_vif *wlvif;
    char buf[10];
    size_t len;
    unsigned long value;
    int ret;

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

    ret = kstrtoul(buf, 0, &value);
    if (ret < 0) {
        wl1271_warning("illegal value for beacon_filtering!");
        return -EINVAL;
    }

    mutex_lock(&wl->mutex);

    ret = wl1271_ps_elp_wakeup(wl);
    if (ret < 0)
        goto out;

    wl12xx_for_each_wlvif(wl, wlvif) {
        ret = wl1271_acx_beacon_filter_opt(wl, wlvif, !!value);
    }

    wl1271_ps_elp_sleep(wl);
out:
    mutex_unlock(&wl->mutex);
    return count;
}

static const struct file_operations beacon_filtering_ops = {
    .write = beacon_filtering_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t fw_stats_raw_read(struct file *file,
                 char __user *userbuf,
                 size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;

    wl1271_debugfs_update_stats(wl);

    return simple_read_from_buffer(userbuf, count, ppos,
                       wl->stats.fw_stats,
                       wl->stats.fw_stats_len);
}

static const struct file_operations fw_stats_raw_ops = {
    .read = fw_stats_raw_read,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t sleep_auth_read(struct file *file, char __user *user_buf,
                   size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;

    return wl1271_format_buffer(user_buf, count,
                    ppos, "%d\n",
                    wl->sleep_auth);
}

static ssize_t sleep_auth_write(struct file *file,
                const char __user *user_buf,
                size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    unsigned long value;
    int ret;

    ret = kstrtoul_from_user(user_buf, count, 0, &value);
    if (ret < 0) {
        wl1271_warning("illegal value in sleep_auth");
        return -EINVAL;
    }

    if (value < 0 || value > WL1271_PSM_MAX) {
        wl1271_warning("sleep_auth must be between 0 and %d",
                   WL1271_PSM_MAX);
        return -ERANGE;
    }

    mutex_lock(&wl->mutex);

    wl->conf.conn.sta_sleep_auth = value;

    if (unlikely(wl->state != WLCORE_STATE_ON)) {
        /* this will show up on "read" in case we are off */
        wl->sleep_auth = value;
        goto out;
    }

    ret = wl1271_ps_elp_wakeup(wl);
    if (ret < 0)
        goto out;

    ret = wl1271_acx_sleep_auth(wl, value);
    if (ret < 0)
        goto out_sleep;

out_sleep:
    wl1271_ps_elp_sleep(wl);
out:
    mutex_unlock(&wl->mutex);
    return count;
}

static const struct file_operations sleep_auth_ops = {
    .read = sleep_auth_read,
    .write = sleep_auth_write,
    .open = simple_open,
    .llseek = default_llseek,
};

static ssize_t dev_mem_read(struct file *file,
         char __user *user_buf, size_t count,
         loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    struct wlcore_partition_set part, old_part;
    size_t bytes = count;
    int ret;
    char *buf;

    /* only requests of dword-aligned size and offset are supported */
    if (bytes % 4)
        return -EINVAL;

    if (*ppos % 4)
        return -EINVAL;

    /* function should return in reasonable time */
    bytes = min(bytes, WLCORE_MAX_BLOCK_SIZE);

    if (bytes == 0)
        return -EINVAL;

    memset(&part, 0, sizeof(part));
    part.mem.start = file->f_pos;
    part.mem.size = bytes;

    buf = kmalloc(bytes, GFP_KERNEL);
    if (!buf)
        return -ENOMEM;

    mutex_lock(&wl->mutex);

    if (unlikely(wl->state == WLCORE_STATE_OFF)) {
        ret = -EFAULT;
        goto skip_read;
    }

    /*
     * Don't fail if elp_wakeup returns an error, so the device's memory
     * could be read even if the FW crashed
     */
    wl1271_ps_elp_wakeup(wl);

    /* store current partition and switch partition */
    memcpy(&old_part, &wl->curr_part, sizeof(old_part));
    ret = wlcore_set_partition(wl, &part);
    if (ret < 0)
        goto part_err;

    ret = wlcore_raw_read(wl, 0, buf, bytes, false);
    if (ret < 0)
        goto read_err;

read_err:
    /* recover partition */
    ret = wlcore_set_partition(wl, &old_part);
    if (ret < 0)
        goto part_err;

part_err:
    wl1271_ps_elp_sleep(wl);

skip_read:
    mutex_unlock(&wl->mutex);

    if (ret == 0) {
        ret = copy_to_user(user_buf, buf, bytes);
        if (ret < bytes) {
            bytes -= ret;
            *ppos += bytes;
            ret = 0;
        } else {
            ret = -EFAULT;
        }
    }

    kfree(buf);

    return ((ret == 0) ? bytes : ret);
}

static ssize_t dev_mem_write(struct file *file, const char __user *user_buf,
        size_t count, loff_t *ppos)
{
    struct wl1271 *wl = file->private_data;
    struct wlcore_partition_set part, old_part;
    size_t bytes = count;
    int ret;
    char *buf;

    /* only requests of dword-aligned size and offset are supported */
    if (bytes % 4)
        return -EINVAL;

    if (*ppos % 4)
        return -EINVAL;

    /* function should return in reasonable time */
    bytes = min(bytes, WLCORE_MAX_BLOCK_SIZE);

    if (bytes == 0)
        return -EINVAL;

    memset(&part, 0, sizeof(part));
    part.mem.start = file->f_pos;
    part.mem.size = bytes;

    buf = kmalloc(bytes, GFP_KERNEL);
    if (!buf)
        return -ENOMEM;

    ret = copy_from_user(buf, user_buf, bytes);
    if (ret) {
        ret = -EFAULT;
        goto err_out;
    }

    mutex_lock(&wl->mutex);

    if (unlikely(wl->state == WLCORE_STATE_OFF)) {
        ret = -EFAULT;
        goto skip_write;
    }

    /*
     * Don't fail if elp_wakeup returns an error, so the device's memory
     * could be read even if the FW crashed
     */
    wl1271_ps_elp_wakeup(wl);

    /* store current partition and switch partition */
    memcpy(&old_part, &wl->curr_part, sizeof(old_part));
    ret = wlcore_set_partition(wl, &part);
    if (ret < 0)
        goto part_err;

    ret = wlcore_raw_write(wl, 0, buf, bytes, false);
    if (ret < 0)
        goto write_err;

write_err:
    /* recover partition */
    ret = wlcore_set_partition(wl, &old_part);
    if (ret < 0)
        goto part_err;

part_err:
    wl1271_ps_elp_sleep(wl);

skip_write:
    mutex_unlock(&wl->mutex);

    if (ret == 0)
        *ppos += bytes;

err_out:
    kfree(buf);

    return ((ret == 0) ? bytes : ret);
}

static loff_t dev_mem_seek(struct file *file, loff_t offset, int orig)
{
    loff_t ret;

    /* only requests of dword-aligned size and offset are supported */
    if (offset % 4)
        return -EINVAL;

    switch (orig) {
    case SEEK_SET:
        file->f_pos = offset;
        ret = file->f_pos;
        break;
    case SEEK_CUR:
        file->f_pos += offset;
        ret = file->f_pos;
        break;
    default:
        ret = -EINVAL;
    }

    return ret;
}

static const struct file_operations dev_mem_ops = {
    .open = simple_open,
    .read = dev_mem_read,
    .write = dev_mem_write,
    .llseek = dev_mem_seek,
};

static int wl1271_debugfs_add_files(struct wl1271 *wl,
                    struct dentry *rootdir)
{
    int ret = 0;
    struct dentry *entry, *streaming;

    DEBUGFS_ADD(tx_queue_len, rootdir);
    DEBUGFS_ADD(retry_count, rootdir);
    DEBUGFS_ADD(excessive_retries, rootdir);

    DEBUGFS_ADD(gpio_power, rootdir);
    DEBUGFS_ADD(start_recovery, rootdir);
    DEBUGFS_ADD(driver_state, rootdir);
    DEBUGFS_ADD(vifs_state, rootdir);
    DEBUGFS_ADD(dtim_interval, rootdir);
    DEBUGFS_ADD(suspend_dtim_interval, rootdir);
    DEBUGFS_ADD(beacon_interval, rootdir);
    DEBUGFS_ADD(beacon_filtering, rootdir);
    DEBUGFS_ADD(dynamic_ps_timeout, rootdir);
    DEBUGFS_ADD(forced_ps, rootdir);
    DEBUGFS_ADD(split_scan_timeout, rootdir);
    DEBUGFS_ADD(irq_pkt_threshold, rootdir);
    DEBUGFS_ADD(irq_blk_threshold, rootdir);
    DEBUGFS_ADD(irq_timeout, rootdir);
    DEBUGFS_ADD(fw_stats_raw, rootdir);
    DEBUGFS_ADD(sleep_auth, rootdir);

    streaming = debugfs_create_dir("rx_streaming", rootdir);
    if (!streaming || IS_ERR(streaming))
        goto err;

    DEBUGFS_ADD_PREFIX(rx_streaming, interval, streaming);
    DEBUGFS_ADD_PREFIX(rx_streaming, always, streaming);

    DEBUGFS_ADD_PREFIX(dev, mem, rootdir);

    return 0;

err:
    if (IS_ERR(entry))
        ret = PTR_ERR(entry);
    else
        ret = -ENOMEM;

    return ret;
}

void wl1271_debugfs_reset(struct wl1271 *wl)
{
    if (!wl->stats.fw_stats)
        return;

    memset(wl->stats.fw_stats, 0, wl->stats.fw_stats_len);
    wl->stats.retry_count = 0;
    wl->stats.excessive_retries = 0;
}

int wl1271_debugfs_init(struct wl1271 *wl)
{
    int ret;
    struct dentry *rootdir;

    rootdir = debugfs_create_dir(KBUILD_MODNAME,
                     wl->hw->wiphy->debugfsdir);

    if (IS_ERR(rootdir)) {
        ret = PTR_ERR(rootdir);
        goto out;
    }

    wl->stats.fw_stats = kzalloc(wl->stats.fw_stats_len, GFP_KERNEL);
    if (!wl->stats.fw_stats) {
        ret = -ENOMEM;
        goto out_remove;
    }

    wl->stats.fw_stats_update = jiffies;

    ret = wl1271_debugfs_add_files(wl, rootdir);
    if (ret < 0)
        goto out_exit;

    ret = wlcore_debugfs_init(wl, rootdir);
    if (ret < 0)
        goto out_exit;

    goto out;

out_exit:
    wl1271_debugfs_exit(wl);

out_remove:
    debugfs_remove_recursive(rootdir);

out:
    return ret;
}

void wl1271_debugfs_exit(struct wl1271 *wl)
{
    kfree(wl->stats.fw_stats);
    wl->stats.fw_stats = NULL;
}