dhd_dbg.c

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/*
 * Copyright (c) 2012 Broadcom Corporation
 *
 * 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/debugfs.h>
#include <linux/if_ether.h>
#include <linux/if.h>
#include <linux/ieee80211.h>
#include <linux/module.h>

#include <defs.h>
#include <brcmu_wifi.h>
#include <brcmu_utils.h>
#include "dhd.h"
#include "dhd_bus.h"
#include "dhd_dbg.h"

static struct dentry *root_folder;

void brcmf_debugfs_init(void)
{
    root_folder = debugfs_create_dir(KBUILD_MODNAME, NULL);
    if (IS_ERR(root_folder))
        root_folder = NULL;
}

void brcmf_debugfs_exit(void)
{
    if (!root_folder)
        return;

    debugfs_remove_recursive(root_folder);
    root_folder = NULL;
}

int brcmf_debugfs_attach(struct brcmf_pub *drvr)
{
    if (!root_folder)
        return -ENODEV;

    drvr->dbgfs_dir = debugfs_create_dir(dev_name(drvr->dev), root_folder);
    return PTR_RET(drvr->dbgfs_dir);
}

void brcmf_debugfs_detach(struct brcmf_pub *drvr)
{
    if (!IS_ERR_OR_NULL(drvr->dbgfs_dir))
        debugfs_remove_recursive(drvr->dbgfs_dir);
}

struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr)
{
    return drvr->dbgfs_dir;
}

static
ssize_t brcmf_debugfs_sdio_counter_read(struct file *f, char __user *data,
                    size_t count, loff_t *ppos)
{
    struct brcmf_sdio_count *sdcnt = f->private_data;
    char buf[750];
    int res;

    /* only allow read from start */
    if (*ppos > 0)
        return 0;

    res = scnprintf(buf, sizeof(buf),
            "intrcount:    %u\nlastintrs:    %u\n"
            "pollcnt:      %u\nregfails:     %u\n"
            "tx_sderrs:    %u\nfcqueued:     %u\n"
            "rxrtx:        %u\nrx_toolong:   %u\n"
            "rxc_errors:   %u\nrx_hdrfail:   %u\n"
            "rx_badhdr:    %u\nrx_badseq:    %u\n"
            "fc_rcvd:      %u\nfc_xoff:      %u\n"
            "fc_xon:       %u\nrxglomfail:   %u\n"
            "rxglomframes: %u\nrxglompkts:   %u\n"
            "f2rxhdrs:     %u\nf2rxdata:     %u\n"
            "f2txdata:     %u\nf1regdata:    %u\n"
            "tickcnt:      %u\ntx_ctlerrs:   %lu\n"
            "tx_ctlpkts:   %lu\nrx_ctlerrs:   %lu\n"
            "rx_ctlpkts:   %lu\nrx_readahead: %lu\n",
            sdcnt->intrcount, sdcnt->lastintrs,
            sdcnt->pollcnt, sdcnt->regfails,
            sdcnt->tx_sderrs, sdcnt->fcqueued,
            sdcnt->rxrtx, sdcnt->rx_toolong,
            sdcnt->rxc_errors, sdcnt->rx_hdrfail,
            sdcnt->rx_badhdr, sdcnt->rx_badseq,
            sdcnt->fc_rcvd, sdcnt->fc_xoff,
            sdcnt->fc_xon, sdcnt->rxglomfail,
            sdcnt->rxglomframes, sdcnt->rxglompkts,
            sdcnt->f2rxhdrs, sdcnt->f2rxdata,
            sdcnt->f2txdata, sdcnt->f1regdata,
            sdcnt->tickcnt, sdcnt->tx_ctlerrs,
            sdcnt->tx_ctlpkts, sdcnt->rx_ctlerrs,
            sdcnt->rx_ctlpkts, sdcnt->rx_readahead_cnt);

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

static const struct file_operations brcmf_debugfs_sdio_counter_ops = {
    .owner = THIS_MODULE,
    .open = simple_open,
    .read = brcmf_debugfs_sdio_counter_read
};

void brcmf_debugfs_create_sdio_count(struct brcmf_pub *drvr,
                     struct brcmf_sdio_count *sdcnt)
{
    struct dentry *dentry = drvr->dbgfs_dir;

    if (!IS_ERR_OR_NULL(dentry))
        debugfs_create_file("counters", S_IRUGO, dentry,
                    sdcnt, &brcmf_debugfs_sdio_counter_ops);
}