debug.c

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/*
 * Copyright (c) 2008-2011 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/export.h>
#include <asm/unaligned.h>

#include "ath9k.h"

#define REG_WRITE_D(_ah, _reg, _val) \
    ath9k_hw_common(_ah)->ops->write((_ah), (_val), (_reg))
#define REG_READ_D(_ah, _reg) \
    ath9k_hw_common(_ah)->ops->read((_ah), (_reg))


static ssize_t ath9k_debugfs_read_buf(struct file *file, char __user *user_buf,
                      size_t count, loff_t *ppos)
{
    u8 *buf = file->private_data;
    return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
}

static int ath9k_debugfs_release_buf(struct inode *inode, struct file *file)
{
    vfree(file->private_data);
    return 0;
}

#ifdef CONFIG_ATH_DEBUG

static ssize_t read_file_debug(struct file *file, char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_common *common = ath9k_hw_common(sc->sc_ah);
    char buf[32];
    unsigned int len;

    len = sprintf(buf, "0x%08x\n", common->debug_mask);
    return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_debug(struct file *file, const char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_common *common = ath9k_hw_common(sc->sc_ah);
    unsigned long mask;
    char buf[32];
    ssize_t len;

    len = min(count, sizeof(buf) - 1);
    if (copy_from_user(buf, user_buf, len))
        return -EFAULT;

    buf[len] = '\0';
    if (strict_strtoul(buf, 0, &mask))
        return -EINVAL;

    common->debug_mask = mask;
    return count;
}

static const struct file_operations fops_debug = {
    .read = read_file_debug,
    .write = write_file_debug,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

#endif

#define DMA_BUF_LEN 1024

static ssize_t read_file_tx_chainmask(struct file *file, char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_hw *ah = sc->sc_ah;
    char buf[32];
    unsigned int len;

    len = sprintf(buf, "0x%08x\n", ah->txchainmask);
    return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_tx_chainmask(struct file *file, const char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_hw *ah = sc->sc_ah;
    unsigned long mask;
    char buf[32];
    ssize_t len;

    len = min(count, sizeof(buf) - 1);
    if (copy_from_user(buf, user_buf, len))
        return -EFAULT;

    buf[len] = '\0';
    if (strict_strtoul(buf, 0, &mask))
        return -EINVAL;

    ah->txchainmask = mask;
    ah->caps.tx_chainmask = mask;
    return count;
}

static const struct file_operations fops_tx_chainmask = {
    .read = read_file_tx_chainmask,
    .write = write_file_tx_chainmask,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};


static ssize_t read_file_rx_chainmask(struct file *file, char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_hw *ah = sc->sc_ah;
    char buf[32];
    unsigned int len;

    len = sprintf(buf, "0x%08x\n", ah->rxchainmask);
    return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_rx_chainmask(struct file *file, const char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_hw *ah = sc->sc_ah;
    unsigned long mask;
    char buf[32];
    ssize_t len;

    len = min(count, sizeof(buf) - 1);
    if (copy_from_user(buf, user_buf, len))
        return -EFAULT;

    buf[len] = '\0';
    if (strict_strtoul(buf, 0, &mask))
        return -EINVAL;

    ah->rxchainmask = mask;
    ah->caps.rx_chainmask = mask;
    return count;
}

static const struct file_operations fops_rx_chainmask = {
    .read = read_file_rx_chainmask,
    .write = write_file_rx_chainmask,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static ssize_t read_file_disable_ani(struct file *file, char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_common *common = ath9k_hw_common(sc->sc_ah);
    char buf[32];
    unsigned int len;

    len = sprintf(buf, "%d\n", common->disable_ani);
    return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_disable_ani(struct file *file,
                      const char __user *user_buf,
                      size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_common *common = ath9k_hw_common(sc->sc_ah);
    unsigned long disable_ani;
    char buf[32];
    ssize_t len;

    len = min(count, sizeof(buf) - 1);
    if (copy_from_user(buf, user_buf, len))
        return -EFAULT;

    buf[len] = '\0';
    if (strict_strtoul(buf, 0, &disable_ani))
        return -EINVAL;

    common->disable_ani = !!disable_ani;

    if (disable_ani) {
        clear_bit(SC_OP_ANI_RUN, &sc->sc_flags);
        ath_stop_ani(sc);
    } else {
        ath_check_ani(sc);
    }

    return count;
}

static const struct file_operations fops_disable_ani = {
    .read = read_file_disable_ani,
    .write = write_file_disable_ani,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static ssize_t read_file_ant_diversity(struct file *file, char __user *user_buf,
                       size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_common *common = ath9k_hw_common(sc->sc_ah);
    char buf[32];
    unsigned int len;

    len = sprintf(buf, "%d\n", common->antenna_diversity);
    return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_ant_diversity(struct file *file,
                    const char __user *user_buf,
                    size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_common *common = ath9k_hw_common(sc->sc_ah);
    unsigned long antenna_diversity;
    char buf[32];
    ssize_t len;

    len = min(count, sizeof(buf) - 1);
    if (copy_from_user(buf, user_buf, len))
        return -EFAULT;

    if (!AR_SREV_9565(sc->sc_ah))
        goto exit;

    buf[len] = '\0';
    if (strict_strtoul(buf, 0, &antenna_diversity))
        return -EINVAL;

    common->antenna_diversity = !!antenna_diversity;
    ath9k_ps_wakeup(sc);
    ath_ant_comb_update(sc);
    ath_dbg(common, CONFIG, "Antenna diversity: %d\n",
        common->antenna_diversity);
    ath9k_ps_restore(sc);
exit:
    return count;
}

static const struct file_operations fops_ant_diversity = {
    .read = read_file_ant_diversity,
    .write = write_file_ant_diversity,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static ssize_t read_file_dma(struct file *file, char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_hw *ah = sc->sc_ah;
    char *buf;
    int retval;
    unsigned int len = 0;
    u32 val[ATH9K_NUM_DMA_DEBUG_REGS];
    int i, qcuOffset = 0, dcuOffset = 0;
    u32 *qcuBase = &val[0], *dcuBase = &val[4];

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

    ath9k_ps_wakeup(sc);

    REG_WRITE_D(ah, AR_MACMISC,
          ((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
           (AR_MACMISC_MISC_OBS_BUS_1 <<
            AR_MACMISC_MISC_OBS_BUS_MSB_S)));

    len += snprintf(buf + len, DMA_BUF_LEN - len,
            "Raw DMA Debug values:\n");

    for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++) {
        if (i % 4 == 0)
            len += snprintf(buf + len, DMA_BUF_LEN - len, "\n");

        val[i] = REG_READ_D(ah, AR_DMADBG_0 + (i * sizeof(u32)));
        len += snprintf(buf + len, DMA_BUF_LEN - len, "%d: %08x ",
                i, val[i]);
    }

    len += snprintf(buf + len, DMA_BUF_LEN - len, "\n\n");
    len += snprintf(buf + len, DMA_BUF_LEN - len,
            "Num QCU: chain_st fsp_ok fsp_st DCU: chain_st\n");

    for (i = 0; i < ATH9K_NUM_QUEUES; i++, qcuOffset += 4, dcuOffset += 5) {
        if (i == 8) {
            qcuOffset = 0;
            qcuBase++;
        }

        if (i == 6) {
            dcuOffset = 0;
            dcuBase++;
        }

        len += snprintf(buf + len, DMA_BUF_LEN - len,
            "%2d          %2x      %1x     %2x           %2x\n",
            i, (*qcuBase & (0x7 << qcuOffset)) >> qcuOffset,
            (*qcuBase & (0x8 << qcuOffset)) >> (qcuOffset + 3),
            val[2] & (0x7 << (i * 3)) >> (i * 3),
            (*dcuBase & (0x1f << dcuOffset)) >> dcuOffset);
    }

    len += snprintf(buf + len, DMA_BUF_LEN - len, "\n");

    len += snprintf(buf + len, DMA_BUF_LEN - len,
        "qcu_stitch state:   %2x    qcu_fetch state:        %2x\n",
        (val[3] & 0x003c0000) >> 18, (val[3] & 0x03c00000) >> 22);
    len += snprintf(buf + len, DMA_BUF_LEN - len,
        "qcu_complete state: %2x    dcu_complete state:     %2x\n",
        (val[3] & 0x1c000000) >> 26, (val[6] & 0x3));
    len += snprintf(buf + len, DMA_BUF_LEN - len,
        "dcu_arb state:      %2x    dcu_fp state:           %2x\n",
        (val[5] & 0x06000000) >> 25, (val[5] & 0x38000000) >> 27);
    len += snprintf(buf + len, DMA_BUF_LEN - len,
        "chan_idle_dur:     %3d    chan_idle_dur_valid:     %1d\n",
        (val[6] & 0x000003fc) >> 2, (val[6] & 0x00000400) >> 10);
    len += snprintf(buf + len, DMA_BUF_LEN - len,
        "txfifo_valid_0:      %1d    txfifo_valid_1:          %1d\n",
        (val[6] & 0x00000800) >> 11, (val[6] & 0x00001000) >> 12);
    len += snprintf(buf + len, DMA_BUF_LEN - len,
        "txfifo_dcu_num_0:   %2d    txfifo_dcu_num_1:       %2d\n",
        (val[6] & 0x0001e000) >> 13, (val[6] & 0x001e0000) >> 17);

    len += snprintf(buf + len, DMA_BUF_LEN - len, "pcu observe: 0x%x\n",
            REG_READ_D(ah, AR_OBS_BUS_1));
    len += snprintf(buf + len, DMA_BUF_LEN - len,
            "AR_CR: 0x%x\n", REG_READ_D(ah, AR_CR));

    ath9k_ps_restore(sc);

    if (len > DMA_BUF_LEN)
        len = DMA_BUF_LEN;

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

static const struct file_operations fops_dma = {
    .read = read_file_dma,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};


void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)
{
    if (status)
        sc->debug.stats.istats.total++;
    if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
        if (status & ATH9K_INT_RXLP)
            sc->debug.stats.istats.rxlp++;
        if (status & ATH9K_INT_RXHP)
            sc->debug.stats.istats.rxhp++;
        if (status & ATH9K_INT_BB_WATCHDOG)
            sc->debug.stats.istats.bb_watchdog++;
    } else {
        if (status & ATH9K_INT_RX)
            sc->debug.stats.istats.rxok++;
    }
    if (status & ATH9K_INT_RXEOL)
        sc->debug.stats.istats.rxeol++;
    if (status & ATH9K_INT_RXORN)
        sc->debug.stats.istats.rxorn++;
    if (status & ATH9K_INT_TX)
        sc->debug.stats.istats.txok++;
    if (status & ATH9K_INT_TXURN)
        sc->debug.stats.istats.txurn++;
    if (status & ATH9K_INT_RXPHY)
        sc->debug.stats.istats.rxphyerr++;
    if (status & ATH9K_INT_RXKCM)
        sc->debug.stats.istats.rx_keycache_miss++;
    if (status & ATH9K_INT_SWBA)
        sc->debug.stats.istats.swba++;
    if (status & ATH9K_INT_BMISS)
        sc->debug.stats.istats.bmiss++;
    if (status & ATH9K_INT_BNR)
        sc->debug.stats.istats.bnr++;
    if (status & ATH9K_INT_CST)
        sc->debug.stats.istats.cst++;
    if (status & ATH9K_INT_GTT)
        sc->debug.stats.istats.gtt++;
    if (status & ATH9K_INT_TIM)
        sc->debug.stats.istats.tim++;
    if (status & ATH9K_INT_CABEND)
        sc->debug.stats.istats.cabend++;
    if (status & ATH9K_INT_DTIMSYNC)
        sc->debug.stats.istats.dtimsync++;
    if (status & ATH9K_INT_DTIM)
        sc->debug.stats.istats.dtim++;
    if (status & ATH9K_INT_TSFOOR)
        sc->debug.stats.istats.tsfoor++;
    if (status & ATH9K_INT_MCI)
        sc->debug.stats.istats.mci++;
    if (status & ATH9K_INT_GENTIMER)
        sc->debug.stats.istats.gen_timer++;
}

static ssize_t read_file_interrupt(struct file *file, char __user *user_buf,
                   size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    unsigned int len = 0;
    int rv;
    int mxlen = 4000;
    char *buf = kmalloc(mxlen, GFP_KERNEL);
    if (!buf)
        return -ENOMEM;

#define PR_IS(a, s)                     \
    do {                            \
        len += snprintf(buf + len, mxlen - len,     \
                "%21s: %10u\n", a,      \
                sc->debug.stats.istats.s);  \
    } while (0)

    if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
        PR_IS("RXLP", rxlp);
        PR_IS("RXHP", rxhp);
        PR_IS("WATHDOG", bb_watchdog);
    } else {
        PR_IS("RX", rxok);
    }
    PR_IS("RXEOL", rxeol);
    PR_IS("RXORN", rxorn);
    PR_IS("TX", txok);
    PR_IS("TXURN", txurn);
    PR_IS("MIB", mib);
    PR_IS("RXPHY", rxphyerr);
    PR_IS("RXKCM", rx_keycache_miss);
    PR_IS("SWBA", swba);
    PR_IS("BMISS", bmiss);
    PR_IS("BNR", bnr);
    PR_IS("CST", cst);
    PR_IS("GTT", gtt);
    PR_IS("TIM", tim);
    PR_IS("CABEND", cabend);
    PR_IS("DTIMSYNC", dtimsync);
    PR_IS("DTIM", dtim);
    PR_IS("TSFOOR", tsfoor);
    PR_IS("MCI", mci);
    PR_IS("GENTIMER", gen_timer);
    PR_IS("TOTAL", total);

    len += snprintf(buf + len, mxlen - len,
            "SYNC_CAUSE stats:\n");

    PR_IS("Sync-All", sync_cause_all);
    PR_IS("RTC-IRQ", sync_rtc_irq);
    PR_IS("MAC-IRQ", sync_mac_irq);
    PR_IS("EEPROM-Illegal-Access", eeprom_illegal_access);
    PR_IS("APB-Timeout", apb_timeout);
    PR_IS("PCI-Mode-Conflict", pci_mode_conflict);
    PR_IS("HOST1-Fatal", host1_fatal);
    PR_IS("HOST1-Perr", host1_perr);
    PR_IS("TRCV-FIFO-Perr", trcv_fifo_perr);
    PR_IS("RADM-CPL-EP", radm_cpl_ep);
    PR_IS("RADM-CPL-DLLP-Abort", radm_cpl_dllp_abort);
    PR_IS("RADM-CPL-TLP-Abort", radm_cpl_tlp_abort);
    PR_IS("RADM-CPL-ECRC-Err", radm_cpl_ecrc_err);
    PR_IS("RADM-CPL-Timeout", radm_cpl_timeout);
    PR_IS("Local-Bus-Timeout", local_timeout);
    PR_IS("PM-Access", pm_access);
    PR_IS("MAC-Awake", mac_awake);
    PR_IS("MAC-Asleep", mac_asleep);
    PR_IS("MAC-Sleep-Access", mac_sleep_access);

    if (len > mxlen)
        len = mxlen;

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

static const struct file_operations fops_interrupt = {
    .read = read_file_interrupt,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

#define PR_QNUM(_n) sc->tx.txq_map[_n]->axq_qnum
#define PR(str, elem)                           \
    do {                                \
        len += snprintf(buf + len, size - len,          \
                "%s%13u%11u%10u%10u\n", str,        \
        sc->debug.stats.txstats[PR_QNUM(WME_AC_BE)].elem, \
        sc->debug.stats.txstats[PR_QNUM(WME_AC_BK)].elem, \
        sc->debug.stats.txstats[PR_QNUM(WME_AC_VI)].elem, \
        sc->debug.stats.txstats[PR_QNUM(WME_AC_VO)].elem); \
        if (len >= size)              \
            goto done;            \
} while(0)

#define PRX(str, elem)                          \
do {                                    \
    len += snprintf(buf + len, size - len,              \
            "%s%13u%11u%10u%10u\n", str,            \
            (unsigned int)(sc->tx.txq_map[WME_AC_BE]->elem),    \
            (unsigned int)(sc->tx.txq_map[WME_AC_BK]->elem),    \
            (unsigned int)(sc->tx.txq_map[WME_AC_VI]->elem),    \
            (unsigned int)(sc->tx.txq_map[WME_AC_VO]->elem));   \
    if (len >= size)                        \
        goto done;                      \
} while(0)

#define PRQLE(str, elem)                        \
do {                                    \
    len += snprintf(buf + len, size - len,              \
            "%s%13i%11i%10i%10i\n", str,            \
            list_empty(&sc->tx.txq_map[WME_AC_BE]->elem),   \
            list_empty(&sc->tx.txq_map[WME_AC_BK]->elem),   \
            list_empty(&sc->tx.txq_map[WME_AC_VI]->elem),   \
            list_empty(&sc->tx.txq_map[WME_AC_VO]->elem));  \
    if (len >= size)                        \
        goto done;                      \
} while (0)

static ssize_t read_file_xmit(struct file *file, char __user *user_buf,
                  size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    char *buf;
    unsigned int len = 0, size = 8000;
    int i;
    ssize_t retval = 0;
    char tmp[32];

    buf = kzalloc(size, GFP_KERNEL);
    if (buf == NULL)
        return -ENOMEM;

    len += sprintf(buf, "Num-Tx-Queues: %i  tx-queues-setup: 0x%x"
               " poll-work-seen: %u\n"
               "%30s %10s%10s%10s\n\n",
               ATH9K_NUM_TX_QUEUES, sc->tx.txqsetup,
               sc->tx_complete_poll_work_seen,
               "BE", "BK", "VI", "VO");

    PR("MPDUs Queued:    ", queued);
    PR("MPDUs Completed: ", completed);
    PR("MPDUs XRetried:  ", xretries);
    PR("Aggregates:      ", a_aggr);
    PR("AMPDUs Queued HW:", a_queued_hw);
    PR("AMPDUs Queued SW:", a_queued_sw);
    PR("AMPDUs Completed:", a_completed);
    PR("AMPDUs Retried:  ", a_retries);
    PR("AMPDUs XRetried: ", a_xretries);
    PR("FIFO Underrun:   ", fifo_underrun);
    PR("TXOP Exceeded:   ", xtxop);
    PR("TXTIMER Expiry:  ", timer_exp);
    PR("DESC CFG Error:  ", desc_cfg_err);
    PR("DATA Underrun:   ", data_underrun);
    PR("DELIM Underrun:  ", delim_underrun);
    PR("TX-Pkts-All:     ", tx_pkts_all);
    PR("TX-Bytes-All:    ", tx_bytes_all);
    PR("hw-put-tx-buf:   ", puttxbuf);
    PR("hw-tx-start:     ", txstart);
    PR("hw-tx-proc-desc: ", txprocdesc);
    PR("TX-Failed:       ", txfailed);
    len += snprintf(buf + len, size - len,
            "%s%11p%11p%10p%10p\n", "txq-memory-address:",
            sc->tx.txq_map[WME_AC_BE],
            sc->tx.txq_map[WME_AC_BK],
            sc->tx.txq_map[WME_AC_VI],
            sc->tx.txq_map[WME_AC_VO]);
    if (len >= size)
        goto done;

    PRX("axq-qnum:        ", axq_qnum);
    PRX("axq-depth:       ", axq_depth);
    PRX("axq-ampdu_depth: ", axq_ampdu_depth);
    PRX("axq-stopped      ", stopped);
    PRX("tx-in-progress   ", axq_tx_inprogress);
    PRX("pending-frames   ", pending_frames);
    PRX("txq_headidx:     ", txq_headidx);
    PRX("txq_tailidx:     ", txq_headidx);

    PRQLE("axq_q empty:       ", axq_q);
    PRQLE("axq_acq empty:     ", axq_acq);
    for (i = 0; i < ATH_TXFIFO_DEPTH; i++) {
        snprintf(tmp, sizeof(tmp) - 1, "txq_fifo[%i] empty: ", i);
        PRQLE(tmp, txq_fifo[i]);
    }

    /* Print out more detailed queue-info */
    for (i = 0; i <= WME_AC_BK; i++) {
        struct ath_txq *txq = &(sc->tx.txq[i]);
        struct ath_atx_ac *ac;
        struct ath_atx_tid *tid;
        if (len >= size)
            goto done;
        spin_lock_bh(&txq->axq_lock);
        if (!list_empty(&txq->axq_acq)) {
            ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac,
                          list);
            len += snprintf(buf + len, size - len,
                    "txq[%i] first-ac: %p sched: %i\n",
                    i, ac, ac->sched);
            if (list_empty(&ac->tid_q) || (len >= size))
                goto done_for;
            tid = list_first_entry(&ac->tid_q, struct ath_atx_tid,
                           list);
            len += snprintf(buf + len, size - len,
                    " first-tid: %p sched: %i paused: %i\n",
                    tid, tid->sched, tid->paused);
        }
    done_for:
        spin_unlock_bh(&txq->axq_lock);
    }

done:
    if (len > size)
        len = size;

    retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
    kfree(buf);

    return retval;
}

static ssize_t read_file_stations(struct file *file, char __user *user_buf,
                  size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    char *buf;
    unsigned int len = 0, size = 64000;
    struct ath_node *an = NULL;
    ssize_t retval = 0;
    int q;

    buf = kzalloc(size, GFP_KERNEL);
    if (buf == NULL)
        return -ENOMEM;

    len += snprintf(buf + len, size - len,
            "Stations:\n"
            " tid: addr sched paused buf_q-empty an ac baw\n"
            " ac: addr sched tid_q-empty txq\n");

    spin_lock(&sc->nodes_lock);
    list_for_each_entry(an, &sc->nodes, list) {
        unsigned short ma = an->maxampdu;
        if (ma == 0)
            ma = 65535; /* see ath_lookup_rate */
        len += snprintf(buf + len, size - len,
                "iface: %pM  sta: %pM max-ampdu: %hu mpdu-density: %uus\n",
                an->vif->addr, an->sta->addr, ma,
                (unsigned int)(an->mpdudensity));
        if (len >= size)
            goto done;

        for (q = 0; q < WME_NUM_TID; q++) {
            struct ath_atx_tid *tid = &(an->tid[q]);
            len += snprintf(buf + len, size - len,
                    " tid: %p %s %s %i %p %p %hu\n",
                    tid, tid->sched ? "sched" : "idle",
                    tid->paused ? "paused" : "running",
                    skb_queue_empty(&tid->buf_q),
                    tid->an, tid->ac, tid->baw_size);
            if (len >= size)
                goto done;
        }

        for (q = 0; q < WME_NUM_AC; q++) {
            struct ath_atx_ac *ac = &(an->ac[q]);
            len += snprintf(buf + len, size - len,
                    " ac: %p %s %i %p\n",
                    ac, ac->sched ? "sched" : "idle",
                    list_empty(&ac->tid_q), ac->txq);
            if (len >= size)
                goto done;
        }
    }

done:
    spin_unlock(&sc->nodes_lock);
    if (len > size)
        len = size;

    retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
    kfree(buf);

    return retval;
}

static ssize_t read_file_misc(struct file *file, char __user *user_buf,
                  size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_common *common = ath9k_hw_common(sc->sc_ah);
    struct ieee80211_hw *hw = sc->hw;
    struct ath9k_vif_iter_data iter_data;
    char buf[512];
    unsigned int len = 0;
    ssize_t retval = 0;
    unsigned int reg;
    u32 rxfilter;

    len += snprintf(buf + len, sizeof(buf) - len,
            "BSSID: %pM\n", common->curbssid);
    len += snprintf(buf + len, sizeof(buf) - len,
            "BSSID-MASK: %pM\n", common->bssidmask);
    len += snprintf(buf + len, sizeof(buf) - len,
            "OPMODE: %s\n", ath_opmode_to_string(sc->sc_ah->opmode));

    ath9k_ps_wakeup(sc);
    rxfilter = ath9k_hw_getrxfilter(sc->sc_ah);
    ath9k_ps_restore(sc);

    len += snprintf(buf + len, sizeof(buf) - len,
            "RXFILTER: 0x%x", rxfilter);

    if (rxfilter & ATH9K_RX_FILTER_UCAST)
        len += snprintf(buf + len, sizeof(buf) - len, " UCAST");
    if (rxfilter & ATH9K_RX_FILTER_MCAST)
        len += snprintf(buf + len, sizeof(buf) - len, " MCAST");
    if (rxfilter & ATH9K_RX_FILTER_BCAST)
        len += snprintf(buf + len, sizeof(buf) - len, " BCAST");
    if (rxfilter & ATH9K_RX_FILTER_CONTROL)
        len += snprintf(buf + len, sizeof(buf) - len, " CONTROL");
    if (rxfilter & ATH9K_RX_FILTER_BEACON)
        len += snprintf(buf + len, sizeof(buf) - len, " BEACON");
    if (rxfilter & ATH9K_RX_FILTER_PROM)
        len += snprintf(buf + len, sizeof(buf) - len, " PROM");
    if (rxfilter & ATH9K_RX_FILTER_PROBEREQ)
        len += snprintf(buf + len, sizeof(buf) - len, " PROBEREQ");
    if (rxfilter & ATH9K_RX_FILTER_PHYERR)
        len += snprintf(buf + len, sizeof(buf) - len, " PHYERR");
    if (rxfilter & ATH9K_RX_FILTER_MYBEACON)
        len += snprintf(buf + len, sizeof(buf) - len, " MYBEACON");
    if (rxfilter & ATH9K_RX_FILTER_COMP_BAR)
        len += snprintf(buf + len, sizeof(buf) - len, " COMP_BAR");
    if (rxfilter & ATH9K_RX_FILTER_PSPOLL)
        len += snprintf(buf + len, sizeof(buf) - len, " PSPOLL");
    if (rxfilter & ATH9K_RX_FILTER_PHYRADAR)
        len += snprintf(buf + len, sizeof(buf) - len, " PHYRADAR");
    if (rxfilter & ATH9K_RX_FILTER_MCAST_BCAST_ALL)
        len += snprintf(buf + len, sizeof(buf) - len, " MCAST_BCAST_ALL");
    if (rxfilter & ATH9K_RX_FILTER_CONTROL_WRAPPER)
        len += snprintf(buf + len, sizeof(buf) - len, " CONTROL_WRAPPER");

    len += snprintf(buf + len, sizeof(buf) - len, "\n");

    reg = sc->sc_ah->imask;

    len += snprintf(buf + len, sizeof(buf) - len, "INTERRUPT-MASK: 0x%x", reg);

    if (reg & ATH9K_INT_SWBA)
        len += snprintf(buf + len, sizeof(buf) - len, " SWBA");
    if (reg & ATH9K_INT_BMISS)
        len += snprintf(buf + len, sizeof(buf) - len, " BMISS");
    if (reg & ATH9K_INT_CST)
        len += snprintf(buf + len, sizeof(buf) - len, " CST");
    if (reg & ATH9K_INT_RX)
        len += snprintf(buf + len, sizeof(buf) - len, " RX");
    if (reg & ATH9K_INT_RXHP)
        len += snprintf(buf + len, sizeof(buf) - len, " RXHP");
    if (reg & ATH9K_INT_RXLP)
        len += snprintf(buf + len, sizeof(buf) - len, " RXLP");
    if (reg & ATH9K_INT_BB_WATCHDOG)
        len += snprintf(buf + len, sizeof(buf) - len, " BB_WATCHDOG");

    len += snprintf(buf + len, sizeof(buf) - len, "\n");

    ath9k_calculate_iter_data(hw, NULL, &iter_data);

    len += snprintf(buf + len, sizeof(buf) - len,
            "VIF-COUNTS: AP: %i STA: %i MESH: %i WDS: %i"
            " ADHOC: %i TOTAL: %hi BEACON-VIF: %hi\n",
            iter_data.naps, iter_data.nstations, iter_data.nmeshes,
            iter_data.nwds, iter_data.nadhocs,
            sc->nvifs, sc->nbcnvifs);

    if (len > sizeof(buf))
        len = sizeof(buf);

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

static ssize_t read_file_reset(struct file *file, char __user *user_buf,
                   size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    char buf[512];
    unsigned int len = 0;

    len += snprintf(buf + len, sizeof(buf) - len,
            "%17s: %2d\n", "Baseband Hang",
            sc->debug.stats.reset[RESET_TYPE_BB_HANG]);
    len += snprintf(buf + len, sizeof(buf) - len,
            "%17s: %2d\n", "Baseband Watchdog",
            sc->debug.stats.reset[RESET_TYPE_BB_WATCHDOG]);
    len += snprintf(buf + len, sizeof(buf) - len,
            "%17s: %2d\n", "Fatal HW Error",
            sc->debug.stats.reset[RESET_TYPE_FATAL_INT]);
    len += snprintf(buf + len, sizeof(buf) - len,
            "%17s: %2d\n", "TX HW error",
            sc->debug.stats.reset[RESET_TYPE_TX_ERROR]);
    len += snprintf(buf + len, sizeof(buf) - len,
            "%17s: %2d\n", "TX Path Hang",
            sc->debug.stats.reset[RESET_TYPE_TX_HANG]);
    len += snprintf(buf + len, sizeof(buf) - len,
            "%17s: %2d\n", "PLL RX Hang",
            sc->debug.stats.reset[RESET_TYPE_PLL_HANG]);

    if (len > sizeof(buf))
        len = sizeof(buf);

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

void ath_debug_stat_tx(struct ath_softc *sc, struct ath_buf *bf,
               struct ath_tx_status *ts, struct ath_txq *txq,
               unsigned int flags)
{
#define TX_SAMP_DBG(c) (sc->debug.bb_mac_samp[sc->debug.sampidx].ts\
            [sc->debug.tsidx].c)
    int qnum = txq->axq_qnum;

    TX_STAT_INC(qnum, tx_pkts_all);
    sc->debug.stats.txstats[qnum].tx_bytes_all += bf->bf_mpdu->len;

    if (bf_isampdu(bf)) {
        if (flags & ATH_TX_ERROR)
            TX_STAT_INC(qnum, a_xretries);
        else
            TX_STAT_INC(qnum, a_completed);
    } else {
        if (ts->ts_status & ATH9K_TXERR_XRETRY)
            TX_STAT_INC(qnum, xretries);
        else
            TX_STAT_INC(qnum, completed);
    }

    if (ts->ts_status & ATH9K_TXERR_FIFO)
        TX_STAT_INC(qnum, fifo_underrun);
    if (ts->ts_status & ATH9K_TXERR_XTXOP)
        TX_STAT_INC(qnum, xtxop);
    if (ts->ts_status & ATH9K_TXERR_TIMER_EXPIRED)
        TX_STAT_INC(qnum, timer_exp);
    if (ts->ts_flags & ATH9K_TX_DESC_CFG_ERR)
        TX_STAT_INC(qnum, desc_cfg_err);
    if (ts->ts_flags & ATH9K_TX_DATA_UNDERRUN)
        TX_STAT_INC(qnum, data_underrun);
    if (ts->ts_flags & ATH9K_TX_DELIM_UNDERRUN)
        TX_STAT_INC(qnum, delim_underrun);

#ifdef CONFIG_ATH9K_MAC_DEBUG
    spin_lock(&sc->debug.samp_lock);
    TX_SAMP_DBG(jiffies) = jiffies;
    TX_SAMP_DBG(rssi_ctl0) = ts->ts_rssi_ctl0;
    TX_SAMP_DBG(rssi_ctl1) = ts->ts_rssi_ctl1;
    TX_SAMP_DBG(rssi_ctl2) = ts->ts_rssi_ctl2;
    TX_SAMP_DBG(rssi_ext0) = ts->ts_rssi_ext0;
    TX_SAMP_DBG(rssi_ext1) = ts->ts_rssi_ext1;
    TX_SAMP_DBG(rssi_ext2) = ts->ts_rssi_ext2;
    TX_SAMP_DBG(rateindex) = ts->ts_rateindex;
    TX_SAMP_DBG(isok) = !!(ts->ts_status & ATH9K_TXERR_MASK);
    TX_SAMP_DBG(rts_fail_cnt) = ts->ts_shortretry;
    TX_SAMP_DBG(data_fail_cnt) = ts->ts_longretry;
    TX_SAMP_DBG(rssi) = ts->ts_rssi;
    TX_SAMP_DBG(tid) = ts->tid;
    TX_SAMP_DBG(qid) = ts->qid;

    if (ts->ts_flags & ATH9K_TX_BA) {
        TX_SAMP_DBG(ba_low) = ts->ba_low;
        TX_SAMP_DBG(ba_high) = ts->ba_high;
    } else {
        TX_SAMP_DBG(ba_low) = 0;
        TX_SAMP_DBG(ba_high) = 0;
    }

    sc->debug.tsidx = (sc->debug.tsidx + 1) % ATH_DBG_MAX_SAMPLES;
    spin_unlock(&sc->debug.samp_lock);
#endif

#undef TX_SAMP_DBG
}

static const struct file_operations fops_xmit = {
    .read = read_file_xmit,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static const struct file_operations fops_stations = {
    .read = read_file_stations,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static const struct file_operations fops_misc = {
    .read = read_file_misc,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static const struct file_operations fops_reset = {
    .read = read_file_reset,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static ssize_t read_file_recv(struct file *file, char __user *user_buf,
                  size_t count, loff_t *ppos)
{
#define PHY_ERR(s, p) \
    len += snprintf(buf + len, size - len, "%22s : %10u\n", s, \
            sc->debug.stats.rxstats.phy_err_stats[p]);

#define RXS_ERR(s, e)                       \
    do {                            \
        len += snprintf(buf + len, size - len,      \
                "%22s : %10u\n", s,     \
                sc->debug.stats.rxstats.e); \
    } while (0)

    struct ath_softc *sc = file->private_data;
    char *buf;
    unsigned int len = 0, size = 1600;
    ssize_t retval = 0;

    buf = kzalloc(size, GFP_KERNEL);
    if (buf == NULL)
        return -ENOMEM;

    RXS_ERR("CRC ERR", crc_err);
    RXS_ERR("DECRYPT CRC ERR", decrypt_crc_err);
    RXS_ERR("PHY ERR", phy_err);
    RXS_ERR("MIC ERR", mic_err);
    RXS_ERR("PRE-DELIM CRC ERR", pre_delim_crc_err);
    RXS_ERR("POST-DELIM CRC ERR", post_delim_crc_err);
    RXS_ERR("DECRYPT BUSY ERR", decrypt_busy_err);
    RXS_ERR("RX-LENGTH-ERR", rx_len_err);
    RXS_ERR("RX-OOM-ERR", rx_oom_err);
    RXS_ERR("RX-RATE-ERR", rx_rate_err);
    RXS_ERR("RX-DROP-RXFLUSH", rx_drop_rxflush);
    RXS_ERR("RX-TOO-MANY-FRAGS", rx_too_many_frags_err);

    PHY_ERR("UNDERRUN ERR", ATH9K_PHYERR_UNDERRUN);
    PHY_ERR("TIMING ERR", ATH9K_PHYERR_TIMING);
    PHY_ERR("PARITY ERR", ATH9K_PHYERR_PARITY);
    PHY_ERR("RATE ERR", ATH9K_PHYERR_RATE);
    PHY_ERR("LENGTH ERR", ATH9K_PHYERR_LENGTH);
    PHY_ERR("RADAR ERR", ATH9K_PHYERR_RADAR);
    PHY_ERR("SERVICE ERR", ATH9K_PHYERR_SERVICE);
    PHY_ERR("TOR ERR", ATH9K_PHYERR_TOR);
    PHY_ERR("OFDM-TIMING ERR", ATH9K_PHYERR_OFDM_TIMING);
    PHY_ERR("OFDM-SIGNAL-PARITY ERR", ATH9K_PHYERR_OFDM_SIGNAL_PARITY);
    PHY_ERR("OFDM-RATE ERR", ATH9K_PHYERR_OFDM_RATE_ILLEGAL);
    PHY_ERR("OFDM-LENGTH ERR", ATH9K_PHYERR_OFDM_LENGTH_ILLEGAL);
    PHY_ERR("OFDM-POWER-DROP ERR", ATH9K_PHYERR_OFDM_POWER_DROP);
    PHY_ERR("OFDM-SERVICE ERR", ATH9K_PHYERR_OFDM_SERVICE);
    PHY_ERR("OFDM-RESTART ERR", ATH9K_PHYERR_OFDM_RESTART);
    PHY_ERR("FALSE-RADAR-EXT ERR", ATH9K_PHYERR_FALSE_RADAR_EXT);
    PHY_ERR("CCK-TIMING ERR", ATH9K_PHYERR_CCK_TIMING);
    PHY_ERR("CCK-HEADER-CRC ERR", ATH9K_PHYERR_CCK_HEADER_CRC);
    PHY_ERR("CCK-RATE ERR", ATH9K_PHYERR_CCK_RATE_ILLEGAL);
    PHY_ERR("CCK-SERVICE ERR", ATH9K_PHYERR_CCK_SERVICE);
    PHY_ERR("CCK-RESTART ERR", ATH9K_PHYERR_CCK_RESTART);
    PHY_ERR("CCK-LENGTH ERR", ATH9K_PHYERR_CCK_LENGTH_ILLEGAL);
    PHY_ERR("CCK-POWER-DROP ERR", ATH9K_PHYERR_CCK_POWER_DROP);
    PHY_ERR("HT-CRC ERR", ATH9K_PHYERR_HT_CRC_ERROR);
    PHY_ERR("HT-LENGTH ERR", ATH9K_PHYERR_HT_LENGTH_ILLEGAL);
    PHY_ERR("HT-RATE ERR", ATH9K_PHYERR_HT_RATE_ILLEGAL);

    RXS_ERR("RX-Pkts-All", rx_pkts_all);
    RXS_ERR("RX-Bytes-All", rx_bytes_all);
    RXS_ERR("RX-Beacons", rx_beacons);
    RXS_ERR("RX-Frags", rx_frags);

    if (len > size)
        len = size;

    retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
    kfree(buf);

    return retval;

#undef RXS_ERR
#undef PHY_ERR
}

void ath_debug_stat_rx(struct ath_softc *sc, struct ath_rx_status *rs)
{
#define RX_PHY_ERR_INC(c) sc->debug.stats.rxstats.phy_err_stats[c]++
#define RX_SAMP_DBG(c) (sc->debug.bb_mac_samp[sc->debug.sampidx].rs\
            [sc->debug.rsidx].c)

    RX_STAT_INC(rx_pkts_all);
    sc->debug.stats.rxstats.rx_bytes_all += rs->rs_datalen;

    if (rs->rs_status & ATH9K_RXERR_CRC)
        RX_STAT_INC(crc_err);
    if (rs->rs_status & ATH9K_RXERR_DECRYPT)
        RX_STAT_INC(decrypt_crc_err);
    if (rs->rs_status & ATH9K_RXERR_MIC)
        RX_STAT_INC(mic_err);
    if (rs->rs_status & ATH9K_RX_DELIM_CRC_PRE)
        RX_STAT_INC(pre_delim_crc_err);
    if (rs->rs_status & ATH9K_RX_DELIM_CRC_POST)
        RX_STAT_INC(post_delim_crc_err);
    if (rs->rs_status & ATH9K_RX_DECRYPT_BUSY)
        RX_STAT_INC(decrypt_busy_err);

    if (rs->rs_status & ATH9K_RXERR_PHY) {
        RX_STAT_INC(phy_err);
        if (rs->rs_phyerr < ATH9K_PHYERR_MAX)
            RX_PHY_ERR_INC(rs->rs_phyerr);
    }

#ifdef CONFIG_ATH9K_MAC_DEBUG
    spin_lock(&sc->debug.samp_lock);
    RX_SAMP_DBG(jiffies) = jiffies;
    RX_SAMP_DBG(rssi_ctl0) = rs->rs_rssi_ctl0;
    RX_SAMP_DBG(rssi_ctl1) = rs->rs_rssi_ctl1;
    RX_SAMP_DBG(rssi_ctl2) = rs->rs_rssi_ctl2;
    RX_SAMP_DBG(rssi_ext0) = rs->rs_rssi_ext0;
    RX_SAMP_DBG(rssi_ext1) = rs->rs_rssi_ext1;
    RX_SAMP_DBG(rssi_ext2) = rs->rs_rssi_ext2;
    RX_SAMP_DBG(antenna) = rs->rs_antenna;
    RX_SAMP_DBG(rssi) = rs->rs_rssi;
    RX_SAMP_DBG(rate) = rs->rs_rate;
    RX_SAMP_DBG(is_mybeacon) = rs->is_mybeacon;

    sc->debug.rsidx = (sc->debug.rsidx + 1) % ATH_DBG_MAX_SAMPLES;
    spin_unlock(&sc->debug.samp_lock);

#endif

#undef RX_PHY_ERR_INC
#undef RX_SAMP_DBG
}

static const struct file_operations fops_recv = {
    .read = read_file_recv,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

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

    len = sprintf(buf, "0x%08x\n", sc->debug.regidx);
    return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_regidx(struct file *file, const char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    unsigned long regidx;
    char buf[32];
    ssize_t len;

    len = min(count, sizeof(buf) - 1);
    if (copy_from_user(buf, user_buf, len))
        return -EFAULT;

    buf[len] = '\0';
    if (strict_strtoul(buf, 0, &regidx))
        return -EINVAL;

    sc->debug.regidx = regidx;
    return count;
}

static const struct file_operations fops_regidx = {
    .read = read_file_regidx,
    .write = write_file_regidx,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static ssize_t read_file_regval(struct file *file, char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_hw *ah = sc->sc_ah;
    char buf[32];
    unsigned int len;
    u32 regval;

    ath9k_ps_wakeup(sc);
    regval = REG_READ_D(ah, sc->debug.regidx);
    ath9k_ps_restore(sc);
    len = sprintf(buf, "0x%08x\n", regval);
    return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_regval(struct file *file, const char __user *user_buf,
                 size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_hw *ah = sc->sc_ah;
    unsigned long regval;
    char buf[32];
    ssize_t len;

    len = min(count, sizeof(buf) - 1);
    if (copy_from_user(buf, user_buf, len))
        return -EFAULT;

    buf[len] = '\0';
    if (strict_strtoul(buf, 0, &regval))
        return -EINVAL;

    ath9k_ps_wakeup(sc);
    REG_WRITE_D(ah, sc->debug.regidx, regval);
    ath9k_ps_restore(sc);
    return count;
}

static const struct file_operations fops_regval = {
    .read = read_file_regval,
    .write = write_file_regval,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

#define REGDUMP_LINE_SIZE   20

static int open_file_regdump(struct inode *inode, struct file *file)
{
    struct ath_softc *sc = inode->i_private;
    unsigned int len = 0;
    u8 *buf;
    int i;
    unsigned long num_regs, regdump_len, max_reg_offset;

    max_reg_offset = AR_SREV_9300_20_OR_LATER(sc->sc_ah) ? 0x16bd4 : 0xb500;
    num_regs = max_reg_offset / 4 + 1;
    regdump_len = num_regs * REGDUMP_LINE_SIZE + 1;
    buf = vmalloc(regdump_len);
    if (!buf)
        return -ENOMEM;

    ath9k_ps_wakeup(sc);
    for (i = 0; i < num_regs; i++)
        len += scnprintf(buf + len, regdump_len - len,
            "0x%06x 0x%08x\n", i << 2, REG_READ(sc->sc_ah, i << 2));
    ath9k_ps_restore(sc);

    file->private_data = buf;

    return 0;
}

static const struct file_operations fops_regdump = {
    .open = open_file_regdump,
    .read = ath9k_debugfs_read_buf,
    .release = ath9k_debugfs_release_buf,
    .owner = THIS_MODULE,
    .llseek = default_llseek,/* read accesses f_pos */
};

static ssize_t read_file_dump_nfcal(struct file *file, char __user *user_buf,
                    size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_hw *ah = sc->sc_ah;
    struct ath9k_nfcal_hist *h = sc->caldata.nfCalHist;
    struct ath_common *common = ath9k_hw_common(ah);
    struct ieee80211_conf *conf = &common->hw->conf;
    u32 len = 0, size = 1500;
    u32 i, j;
    ssize_t retval = 0;
    char *buf;
    u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask;
    u8 nread;

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

    len += snprintf(buf + len, size - len,
            "Channel Noise Floor : %d\n", ah->noise);
    len += snprintf(buf + len, size - len,
            "Chain | privNF | # Readings | NF Readings\n");
    for (i = 0; i < NUM_NF_READINGS; i++) {
        if (!(chainmask & (1 << i)) ||
            ((i >= AR5416_MAX_CHAINS) && !conf_is_ht40(conf)))
            continue;

        nread = AR_PHY_CCA_FILTERWINDOW_LENGTH - h[i].invalidNFcount;
        len += snprintf(buf + len, size - len, " %d\t %d\t %d\t\t",
                i, h[i].privNF, nread);
        for (j = 0; j < nread; j++)
            len += snprintf(buf + len, size - len,
                    " %d", h[i].nfCalBuffer[j]);
        len += snprintf(buf + len, size - len, "\n");
    }

    if (len > size)
        len = size;

    retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
    kfree(buf);

    return retval;
}

static const struct file_operations fops_dump_nfcal = {
    .read = read_file_dump_nfcal,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static ssize_t read_file_base_eeprom(struct file *file, char __user *user_buf,
                     size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_hw *ah = sc->sc_ah;
    u32 len = 0, size = 1500;
    ssize_t retval = 0;
    char *buf;

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

    len = ah->eep_ops->dump_eeprom(ah, true, buf, len, size);

    retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
    kfree(buf);

    return retval;
}

static const struct file_operations fops_base_eeprom = {
    .read = read_file_base_eeprom,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

static ssize_t read_file_modal_eeprom(struct file *file, char __user *user_buf,
                      size_t count, loff_t *ppos)
{
    struct ath_softc *sc = file->private_data;
    struct ath_hw *ah = sc->sc_ah;
    u32 len = 0, size = 6000;
    char *buf;
    size_t retval;

    buf = kzalloc(size, GFP_KERNEL);
    if (buf == NULL)
        return -ENOMEM;

    len = ah->eep_ops->dump_eeprom(ah, false, buf, len, size);

    retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
    kfree(buf);

    return retval;
}

static const struct file_operations fops_modal_eeprom = {
    .read = read_file_modal_eeprom,
    .open = simple_open,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

#ifdef CONFIG_ATH9K_MAC_DEBUG

void ath9k_debug_samp_bb_mac(struct ath_softc *sc)
{
#define ATH_SAMP_DBG(c) (sc->debug.bb_mac_samp[sc->debug.sampidx].c)
    struct ath_hw *ah = sc->sc_ah;
    struct ath_common *common = ath9k_hw_common(ah);
    unsigned long flags;
    int i;

    ath9k_ps_wakeup(sc);

    spin_lock_bh(&sc->debug.samp_lock);

    spin_lock_irqsave(&common->cc_lock, flags);
    ath_hw_cycle_counters_update(common);

    ATH_SAMP_DBG(cc.cycles) = common->cc_ani.cycles;
    ATH_SAMP_DBG(cc.rx_busy) = common->cc_ani.rx_busy;
    ATH_SAMP_DBG(cc.rx_frame) = common->cc_ani.rx_frame;
    ATH_SAMP_DBG(cc.tx_frame) = common->cc_ani.tx_frame;
    spin_unlock_irqrestore(&common->cc_lock, flags);

    ATH_SAMP_DBG(noise) = ah->noise;

    REG_WRITE_D(ah, AR_MACMISC,
          ((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
           (AR_MACMISC_MISC_OBS_BUS_1 <<
            AR_MACMISC_MISC_OBS_BUS_MSB_S)));

    for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++)
        ATH_SAMP_DBG(dma_dbg_reg_vals[i]) = REG_READ_D(ah,
                AR_DMADBG_0 + (i * sizeof(u32)));

    ATH_SAMP_DBG(pcu_obs) = REG_READ_D(ah, AR_OBS_BUS_1);
    ATH_SAMP_DBG(pcu_cr) = REG_READ_D(ah, AR_CR);

    memcpy(ATH_SAMP_DBG(nfCalHist), sc->caldata.nfCalHist,
            sizeof(ATH_SAMP_DBG(nfCalHist)));

    sc->debug.sampidx = (sc->debug.sampidx + 1) % ATH_DBG_MAX_SAMPLES;
    spin_unlock_bh(&sc->debug.samp_lock);
    ath9k_ps_restore(sc);

#undef ATH_SAMP_DBG
}

static int open_file_bb_mac_samps(struct inode *inode, struct file *file)
{
#define ATH_SAMP_DBG(c) bb_mac_samp[sampidx].c
    struct ath_softc *sc = inode->i_private;
    struct ath_hw *ah = sc->sc_ah;
    struct ath_common *common = ath9k_hw_common(ah);
    struct ieee80211_conf *conf = &common->hw->conf;
    struct ath_dbg_bb_mac_samp *bb_mac_samp;
    struct ath9k_nfcal_hist *h;
    int i, j, qcuOffset = 0, dcuOffset = 0;
    u32 *qcuBase, *dcuBase, size = 30000, len = 0;
    u32 sampidx = 0;
    u8 *buf;
    u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask;
    u8 nread;

    if (test_bit(SC_OP_INVALID, &sc->sc_flags))
        return -EAGAIN;

    buf = vmalloc(size);
    if (!buf)
        return -ENOMEM;
    bb_mac_samp = vmalloc(sizeof(*bb_mac_samp) * ATH_DBG_MAX_SAMPLES);
    if (!bb_mac_samp) {
        vfree(buf);
        return -ENOMEM;
    }
    /* Account the current state too */
    ath9k_debug_samp_bb_mac(sc);

    spin_lock_bh(&sc->debug.samp_lock);
    memcpy(bb_mac_samp, sc->debug.bb_mac_samp,
            sizeof(*bb_mac_samp) * ATH_DBG_MAX_SAMPLES);
    len += snprintf(buf + len, size - len,
            "Current Sample Index: %d\n", sc->debug.sampidx);
    spin_unlock_bh(&sc->debug.samp_lock);

    len += snprintf(buf + len, size - len,
            "Raw DMA Debug Dump:\n");
    len += snprintf(buf + len, size - len, "Sample |\t");
    for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++)
        len += snprintf(buf + len, size - len, " DMA Reg%d |\t", i);
    len += snprintf(buf + len, size - len, "\n");

    for (sampidx = 0; sampidx < ATH_DBG_MAX_SAMPLES; sampidx++) {
        len += snprintf(buf + len, size - len, "%d\t", sampidx);

        for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++)
            len += snprintf(buf + len, size - len, " %08x\t",
                    ATH_SAMP_DBG(dma_dbg_reg_vals[i]));
        len += snprintf(buf + len, size - len, "\n");
    }
    len += snprintf(buf + len, size - len, "\n");

    len += snprintf(buf + len, size - len,
            "Sample Num QCU: chain_st fsp_ok fsp_st DCU: chain_st\n");
    for (sampidx = 0; sampidx < ATH_DBG_MAX_SAMPLES; sampidx++) {
        qcuBase = &ATH_SAMP_DBG(dma_dbg_reg_vals[0]);
        dcuBase = &ATH_SAMP_DBG(dma_dbg_reg_vals[4]);

        for (i = 0; i < ATH9K_NUM_QUEUES; i++,
                qcuOffset += 4, dcuOffset += 5) {
            if (i == 8) {
                qcuOffset = 0;
                qcuBase++;
            }

            if (i == 6) {
                dcuOffset = 0;
                dcuBase++;
            }
            if (!sc->debug.stats.txstats[i].queued)
                continue;

            len += snprintf(buf + len, size - len,
                "%4d %7d    %2x      %1x     %2x         %2x\n",
                sampidx, i,
                (*qcuBase & (0x7 << qcuOffset)) >> qcuOffset,
                (*qcuBase & (0x8 << qcuOffset)) >>
                (qcuOffset + 3),
                ATH_SAMP_DBG(dma_dbg_reg_vals[2]) &
                (0x7 << (i * 3)) >> (i * 3),
                (*dcuBase & (0x1f << dcuOffset)) >> dcuOffset);
        }
        len += snprintf(buf + len, size - len, "\n");
    }
    len += snprintf(buf + len, size - len,
            "samp qcu_sh qcu_fh qcu_comp dcu_comp dcu_arb dcu_fp "
            "ch_idle_dur ch_idle_dur_val txfifo_val0 txfifo_val1 "
            "txfifo_dcu0 txfifo_dcu1 pcu_obs AR_CR\n");

    for (sampidx = 0; sampidx < ATH_DBG_MAX_SAMPLES; sampidx++) {
        qcuBase = &ATH_SAMP_DBG(dma_dbg_reg_vals[0]);
        dcuBase = &ATH_SAMP_DBG(dma_dbg_reg_vals[4]);

        len += snprintf(buf + len, size - len, "%4d %5x %5x ", sampidx,
            (ATH_SAMP_DBG(dma_dbg_reg_vals[3]) & 0x003c0000) >> 18,
            (ATH_SAMP_DBG(dma_dbg_reg_vals[3]) & 0x03c00000) >> 22);
        len += snprintf(buf + len, size - len, "%7x %8x ",
            (ATH_SAMP_DBG(dma_dbg_reg_vals[3]) & 0x1c000000) >> 26,
            (ATH_SAMP_DBG(dma_dbg_reg_vals[6]) & 0x3));
        len += snprintf(buf + len, size - len, "%7x %7x ",
            (ATH_SAMP_DBG(dma_dbg_reg_vals[5]) & 0x06000000) >> 25,
            (ATH_SAMP_DBG(dma_dbg_reg_vals[5]) & 0x38000000) >> 27);
        len += snprintf(buf + len, size - len, "%7d %12d ",
            (ATH_SAMP_DBG(dma_dbg_reg_vals[6]) & 0x000003fc) >> 2,
            (ATH_SAMP_DBG(dma_dbg_reg_vals[6]) & 0x00000400) >> 10);
        len += snprintf(buf + len, size - len, "%12d %12d ",
            (ATH_SAMP_DBG(dma_dbg_reg_vals[6]) & 0x00000800) >> 11,
            (ATH_SAMP_DBG(dma_dbg_reg_vals[6]) & 0x00001000) >> 12);
        len += snprintf(buf + len, size - len, "%12d %12d ",
            (ATH_SAMP_DBG(dma_dbg_reg_vals[6]) & 0x0001e000) >> 13,
            (ATH_SAMP_DBG(dma_dbg_reg_vals[6]) & 0x001e0000) >> 17);
        len += snprintf(buf + len, size - len, "0x%07x 0x%07x\n",
                ATH_SAMP_DBG(pcu_obs), ATH_SAMP_DBG(pcu_cr));
    }

    len += snprintf(buf + len, size - len,
            "Sample ChNoise Chain privNF #Reading Readings\n");
    for (sampidx = 0; sampidx < ATH_DBG_MAX_SAMPLES; sampidx++) {
        h = ATH_SAMP_DBG(nfCalHist);
        if (!ATH_SAMP_DBG(noise))
            continue;

        for (i = 0; i < NUM_NF_READINGS; i++) {
            if (!(chainmask & (1 << i)) ||
                ((i >= AR5416_MAX_CHAINS) && !conf_is_ht40(conf)))
                continue;

            nread = AR_PHY_CCA_FILTERWINDOW_LENGTH -
                h[i].invalidNFcount;
            len += snprintf(buf + len, size - len,
                    "%4d %5d %4d\t   %d\t %d\t",
                    sampidx, ATH_SAMP_DBG(noise),
                    i, h[i].privNF, nread);
            for (j = 0; j < nread; j++)
                len += snprintf(buf + len, size - len,
                    " %d", h[i].nfCalBuffer[j]);
            len += snprintf(buf + len, size - len, "\n");
        }
    }
    len += snprintf(buf + len, size - len, "\nCycle counters:\n"
            "Sample Total    Rxbusy   Rxframes Txframes\n");
    for (sampidx = 0; sampidx < ATH_DBG_MAX_SAMPLES; sampidx++) {
        if (!ATH_SAMP_DBG(cc.cycles))
            continue;
        len += snprintf(buf + len, size - len,
                "%4d %08x %08x %08x %08x\n",
                sampidx, ATH_SAMP_DBG(cc.cycles),
                ATH_SAMP_DBG(cc.rx_busy),
                ATH_SAMP_DBG(cc.rx_frame),
                ATH_SAMP_DBG(cc.tx_frame));
    }

    len += snprintf(buf + len, size - len, "Tx status Dump :\n");
    len += snprintf(buf + len, size - len,
            "Sample rssi:- ctl0 ctl1 ctl2 ext0 ext1 ext2 comb "
            "isok rts_fail data_fail rate tid qid "
                    "ba_low  ba_high tx_before(ms)\n");
    for (sampidx = 0; sampidx < ATH_DBG_MAX_SAMPLES; sampidx++) {
        for (i = 0; i < ATH_DBG_MAX_SAMPLES; i++) {
            if (!ATH_SAMP_DBG(ts[i].jiffies))
                continue;
            len += snprintf(buf + len, size - len, "%-14d"
                "%-4d %-4d %-4d %-4d %-4d %-4d %-4d %-4d %-8d "
                "%-9d %-4d %-3d %-3d %08x %08x %-11d\n",
                sampidx,
                ATH_SAMP_DBG(ts[i].rssi_ctl0),
                ATH_SAMP_DBG(ts[i].rssi_ctl1),
                ATH_SAMP_DBG(ts[i].rssi_ctl2),
                ATH_SAMP_DBG(ts[i].rssi_ext0),
                ATH_SAMP_DBG(ts[i].rssi_ext1),
                ATH_SAMP_DBG(ts[i].rssi_ext2),
                ATH_SAMP_DBG(ts[i].rssi),
                ATH_SAMP_DBG(ts[i].isok),
                ATH_SAMP_DBG(ts[i].rts_fail_cnt),
                ATH_SAMP_DBG(ts[i].data_fail_cnt),
                ATH_SAMP_DBG(ts[i].rateindex),
                ATH_SAMP_DBG(ts[i].tid),
                ATH_SAMP_DBG(ts[i].qid),
                ATH_SAMP_DBG(ts[i].ba_low),
                ATH_SAMP_DBG(ts[i].ba_high),
                jiffies_to_msecs(jiffies -
                    ATH_SAMP_DBG(ts[i].jiffies)));
        }
    }

    len += snprintf(buf + len, size - len, "Rx status Dump :\n");
    len += snprintf(buf + len, size - len, "Sample rssi:- ctl0 ctl1 ctl2 "
            "ext0 ext1 ext2 comb beacon ant rate rx_before(ms)\n");
    for (sampidx = 0; sampidx < ATH_DBG_MAX_SAMPLES; sampidx++) {
        for (i = 0; i < ATH_DBG_MAX_SAMPLES; i++) {
            if (!ATH_SAMP_DBG(rs[i].jiffies))
                continue;
            len += snprintf(buf + len, size - len, "%-14d"
                "%-4d %-4d %-4d %-4d %-4d %-4d %-4d %-9s %-2d %02x %-13d\n",
                sampidx,
                ATH_SAMP_DBG(rs[i].rssi_ctl0),
                ATH_SAMP_DBG(rs[i].rssi_ctl1),
                ATH_SAMP_DBG(rs[i].rssi_ctl2),
                ATH_SAMP_DBG(rs[i].rssi_ext0),
                ATH_SAMP_DBG(rs[i].rssi_ext1),
                ATH_SAMP_DBG(rs[i].rssi_ext2),
                ATH_SAMP_DBG(rs[i].rssi),
                ATH_SAMP_DBG(rs[i].is_mybeacon) ?
                "True" : "False",
                ATH_SAMP_DBG(rs[i].antenna),
                ATH_SAMP_DBG(rs[i].rate),
                jiffies_to_msecs(jiffies -
                    ATH_SAMP_DBG(rs[i].jiffies)));
        }
    }

    vfree(bb_mac_samp);
    file->private_data = buf;

    return 0;
#undef ATH_SAMP_DBG
}

static const struct file_operations fops_samps = {
    .open = open_file_bb_mac_samps,
    .read = ath9k_debugfs_read_buf,
    .release = ath9k_debugfs_release_buf,
    .owner = THIS_MODULE,
    .llseek = default_llseek,
};

#endif

int ath9k_init_debug(struct ath_hw *ah)
{
    struct ath_common *common = ath9k_hw_common(ah);
    struct ath_softc *sc = (struct ath_softc *) common->priv;

    sc->debug.debugfs_phy = debugfs_create_dir("ath9k",
                           sc->hw->wiphy->debugfsdir);
    if (!sc->debug.debugfs_phy)
        return -ENOMEM;

#ifdef CONFIG_ATH_DEBUG
    debugfs_create_file("debug", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
                sc, &fops_debug);
#endif

    ath9k_dfs_init_debug(sc);

    debugfs_create_file("dma", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_dma);
    debugfs_create_file("interrupt", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_interrupt);
    debugfs_create_file("xmit", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_xmit);
    debugfs_create_u32("qlen_bk", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
               &sc->tx.txq_max_pending[WME_AC_BK]);
    debugfs_create_u32("qlen_be", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
               &sc->tx.txq_max_pending[WME_AC_BE]);
    debugfs_create_u32("qlen_vi", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
               &sc->tx.txq_max_pending[WME_AC_VI]);
    debugfs_create_u32("qlen_vo", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
               &sc->tx.txq_max_pending[WME_AC_VO]);
    debugfs_create_file("stations", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_stations);
    debugfs_create_file("misc", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_misc);
    debugfs_create_file("reset", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_reset);
    debugfs_create_file("recv", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_recv);
    debugfs_create_file("rx_chainmask", S_IRUSR | S_IWUSR,
                sc->debug.debugfs_phy, sc, &fops_rx_chainmask);
    debugfs_create_file("tx_chainmask", S_IRUSR | S_IWUSR,
                sc->debug.debugfs_phy, sc, &fops_tx_chainmask);
    debugfs_create_file("disable_ani", S_IRUSR | S_IWUSR,
                sc->debug.debugfs_phy, sc, &fops_disable_ani);
    debugfs_create_bool("paprd", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
                &sc->sc_ah->config.enable_paprd);
    debugfs_create_file("regidx", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
                sc, &fops_regidx);
    debugfs_create_file("regval", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
                sc, &fops_regval);
    debugfs_create_bool("ignore_extcca", S_IRUSR | S_IWUSR,
                sc->debug.debugfs_phy,
                &ah->config.cwm_ignore_extcca);
    debugfs_create_file("regdump", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_regdump);
    debugfs_create_file("dump_nfcal", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_dump_nfcal);
    debugfs_create_file("base_eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_base_eeprom);
    debugfs_create_file("modal_eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_modal_eeprom);
#ifdef CONFIG_ATH9K_MAC_DEBUG
    debugfs_create_file("samples", S_IRUSR, sc->debug.debugfs_phy, sc,
                &fops_samps);
#endif
    debugfs_create_u32("gpio_mask", S_IRUSR | S_IWUSR,
               sc->debug.debugfs_phy, &sc->sc_ah->gpio_mask);
    debugfs_create_u32("gpio_val", S_IRUSR | S_IWUSR,
               sc->debug.debugfs_phy, &sc->sc_ah->gpio_val);
    debugfs_create_file("diversity", S_IRUSR | S_IWUSR,
                sc->debug.debugfs_phy, sc, &fops_ant_diversity);

    return 0;
}