wireless/bcmdhd/wldev_common.c

/*
 * Common function shared by Linux WEXT, cfg80211 and p2p drivers
 *
 * Copyright (C) 1999-2017, Broadcom Corporation
 *
 *      Unless you and Broadcom execute a separate written software license
 * agreement governing use of this software, this software is licensed to you
 * under the terms of the GNU General Public License version 2 (the "GPL"),
 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
 * following added to such license:
 *
 *      As a special exception, the copyright holders of this software give you
 * permission to link this software with independent modules, and to copy and
 * distribute the resulting executable under terms of your choice, provided that
 * you also meet, for each linked independent module, the terms and conditions of
 * the license of that module.  An independent module is a module which is not
 * derived from this software.  The special exception does not apply to any
 * modifications of the software.
 *
 *      Notwithstanding the above, under no circumstances may you combine this
 * software in any way with any other Broadcom software provided under a license
 * other than the GPL, without Broadcom's express prior written consent.
 *
 *
 * <<Broadcom-WL-IPTag/Open:>>
 *
 * $Id: wldev_common.c 699163 2017-05-12 05:18:23Z $
 */

#include <osl.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/netdevice.h>

#include <wldev_common.h>
#include <bcmutils.h>
#ifdef WL_CFG80211
#include <wl_cfg80211.h>
#endif
#include <dhd_config.h>

#define htod32(i) (i)
#define htod16(i) (i)
#define dtoh32(i) (i)
#define dtoh16(i) (i)
#define htodchanspec(i) (i)
#define dtohchanspec(i) (i)

#define    WLDEV_ERROR(args)                        \
    do {                                        \
        printk(KERN_ERR "WLDEV-ERROR) ");    \
        printk args;                            \
    } while (0)

#define    WLDEV_INFO(args)                        \
    do {                                        \
        printk(KERN_INFO "WLDEV-INFO) ");    \
        printk args;                            \
    } while (0)

extern int dhd_ioctl_entry_local(struct net_device *net, wl_ioctl_t *ioc, int cmd);

s32 wldev_ioctl(
    struct net_device *dev, u32 cmd, void *arg, u32 len, u32 set)
{
    s32 ret = 0;
    struct wl_ioctl ioc;


    memset(&ioc, 0, sizeof(ioc));
    ioc.cmd = cmd;
    ioc.buf = arg;
    ioc.len = len;
    ioc.set = set;

    ret = dhd_ioctl_entry_local(dev, &ioc, cmd);

    return ret;
}


/*
SET commands :
cast buffer to non-const  and call the GET function
*/

s32 wldev_ioctl_set(
    struct net_device *dev, u32 cmd, const void *arg, u32 len)
{
#if defined(STRICT_GCC_WARNINGS) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wcast-qual"
#endif
    return wldev_ioctl(dev, cmd, (void *)arg, len, 1);
#if defined(STRICT_GCC_WARNINGS) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
}


s32 wldev_ioctl_get(
    struct net_device *dev, u32 cmd, void *arg, u32 len)
{
    return wldev_ioctl(dev, cmd, (void *)arg, len, 0);
}

/* Format a iovar buffer, not bsscfg indexed. The bsscfg index will be
 * taken care of in dhd_ioctl_entry. Internal use only, not exposed to
 * wl_iw, wl_cfg80211 and wl_cfgp2p
 */
static s32 wldev_mkiovar(
    const s8 *iovar_name, s8 *param, s32 paramlen,
    s8 *iovar_buf, u32 buflen)
{
    s32 iolen = 0;

    iolen = bcm_mkiovar(iovar_name, param, paramlen, iovar_buf, buflen);
    return iolen;
}

s32 wldev_iovar_getbuf(
    struct net_device *dev, s8 *iovar_name,
    void *param, s32 paramlen, void *buf, s32 buflen, struct mutex* buf_sync)
{
    s32 ret = 0;
    if (buf_sync) {
        mutex_lock(buf_sync);
    }

    if (buf && (buflen > 0)) {
        /* initialize the response buffer */
        memset(buf, 0, buflen);
    } else {
        ret = BCME_BADARG;
        goto exit;
    }

    ret = wldev_mkiovar(iovar_name, param, paramlen, buf, buflen);

    if (!ret) {
        ret = BCME_BUFTOOSHORT;
        goto exit;
    }
    ret = wldev_ioctl_get(dev, WLC_GET_VAR, buf, buflen);
exit:
    if (buf_sync)
        mutex_unlock(buf_sync);
    return ret;
}


s32 wldev_iovar_setbuf(
    struct net_device *dev, s8 *iovar_name,
    void *param, s32 paramlen, void *buf, s32 buflen, struct mutex* buf_sync)
{
    s32 ret = 0;
    s32 iovar_len;
    if (buf_sync) {
        mutex_lock(buf_sync);
    }
    iovar_len = wldev_mkiovar(iovar_name, param, paramlen, buf, buflen);
    if (iovar_len > 0)
        ret = wldev_ioctl_set(dev, WLC_SET_VAR, buf, iovar_len);
    else
        ret = BCME_BUFTOOSHORT;

    if (buf_sync)
        mutex_unlock(buf_sync);
    return ret;
}

s32 wldev_iovar_setint(
    struct net_device *dev, s8 *iovar, s32 val)
{
    s8 iovar_buf[WLC_IOCTL_SMLEN];

    val = htod32(val);
    memset(iovar_buf, 0, sizeof(iovar_buf));
    return wldev_iovar_setbuf(dev, iovar, &val, sizeof(val), iovar_buf,
        sizeof(iovar_buf), NULL);
}


s32 wldev_iovar_getint(
    struct net_device *dev, s8 *iovar, s32 *pval)
{
    s8 iovar_buf[WLC_IOCTL_SMLEN];
    s32 err;

    memset(iovar_buf, 0, sizeof(iovar_buf));
    err = wldev_iovar_getbuf(dev, iovar, pval, sizeof(*pval), iovar_buf,
        sizeof(iovar_buf), NULL);
    if (err == 0)
    {
        memcpy(pval, iovar_buf, sizeof(*pval));
        *pval = dtoh32(*pval);
    }
    return err;
}

/** Format a bsscfg indexed iovar buffer. The bsscfg index will be
 *  taken care of in dhd_ioctl_entry. Internal use only, not exposed to
 *  wl_iw, wl_cfg80211 and wl_cfgp2p
 */
s32 wldev_mkiovar_bsscfg(
    const s8 *iovar_name, s8 *param, s32 paramlen,
    s8 *iovar_buf, s32 buflen, s32 bssidx)
{
    const s8 *prefix = "bsscfg:";
    s8 *p;
    u32 prefixlen;
    u32 namelen;
    u32 iolen;

    /* initialize buffer */
    if (!iovar_buf || buflen == 0)
        return BCME_BADARG;
    memset(iovar_buf, 0, buflen);

    if (bssidx == 0) {
        return wldev_mkiovar(iovar_name, param, paramlen,
            iovar_buf, buflen);
    }

    prefixlen = (u32) strlen(prefix); /* lengh of bsscfg prefix */
    namelen = (u32) strlen(iovar_name) + 1; /* lengh of iovar  name + null */
    iolen = prefixlen + namelen + sizeof(u32) + paramlen;

    if (buflen < 0 || iolen > (u32)buflen)
    {
        WLDEV_ERROR(("%s: buffer is too short\n", __FUNCTION__));
        return BCME_BUFTOOSHORT;
    }

    p = (s8 *)iovar_buf;

    /* copy prefix, no null */
    memcpy(p, prefix, prefixlen);
    p += prefixlen;

    /* copy iovar name including null */
    memcpy(p, iovar_name, namelen);
    p += namelen;

    /* bss config index as first param */
    bssidx = htod32(bssidx);
    memcpy(p, &bssidx, sizeof(u32));
    p += sizeof(u32);

    /* parameter buffer follows */
    if (paramlen)
        memcpy(p, param, paramlen);

    return iolen;
}

s32 wldev_iovar_getbuf_bsscfg(
    struct net_device *dev, s8 *iovar_name,
    void *param, s32 paramlen, void *buf, s32 buflen, s32 bsscfg_idx, struct mutex* buf_sync)
{
    s32 ret = 0;
    if (buf_sync) {
        mutex_lock(buf_sync);
    }

    wldev_mkiovar_bsscfg(iovar_name, param, paramlen, buf, buflen, bsscfg_idx);
    ret = wldev_ioctl_get(dev, WLC_GET_VAR, buf, buflen);
    if (buf_sync) {
        mutex_unlock(buf_sync);
    }
    return ret;
}

s32 wldev_iovar_setbuf_bsscfg(
    struct net_device *dev, s8 *iovar_name,
    void *param, s32 paramlen, void *buf, s32 buflen, s32 bsscfg_idx, struct mutex* buf_sync)
{
    s32 ret = 0;
    s32 iovar_len;
    if (buf_sync) {
        mutex_lock(buf_sync);
    }
    iovar_len = wldev_mkiovar_bsscfg(iovar_name, param, paramlen, buf, buflen, bsscfg_idx);
    if (iovar_len > 0)
        ret = wldev_ioctl_set(dev, WLC_SET_VAR, buf, iovar_len);
    else {
        ret = BCME_BUFTOOSHORT;
    }

    if (buf_sync) {
        mutex_unlock(buf_sync);
    }
    return ret;
}

s32 wldev_iovar_setint_bsscfg(
    struct net_device *dev, s8 *iovar, s32 val, s32 bssidx)
{
    s8 iovar_buf[WLC_IOCTL_SMLEN];

    val = htod32(val);
    memset(iovar_buf, 0, sizeof(iovar_buf));
    return wldev_iovar_setbuf_bsscfg(dev, iovar, &val, sizeof(val), iovar_buf,
        sizeof(iovar_buf), bssidx, NULL);
}


s32 wldev_iovar_getint_bsscfg(
    struct net_device *dev, s8 *iovar, s32 *pval, s32 bssidx)
{
    s8 iovar_buf[WLC_IOCTL_SMLEN];
    s32 err;

    memset(iovar_buf, 0, sizeof(iovar_buf));
    err = wldev_iovar_getbuf_bsscfg(dev, iovar, pval, sizeof(*pval), iovar_buf,
        sizeof(iovar_buf), bssidx, NULL);
    if (err == 0)
    {
        memcpy(pval, iovar_buf, sizeof(*pval));
        *pval = dtoh32(*pval);
    }
    return err;
}

int wldev_get_link_speed(
    struct net_device *dev, int *plink_speed)
{
    int error;

    if (!plink_speed)
        return -ENOMEM;
    *plink_speed = 0;
    error = wldev_ioctl_get(dev, WLC_GET_RATE, plink_speed, sizeof(int));
    if (unlikely(error))
        return error;

    /* Convert internal 500Kbps to Kbps */
    *plink_speed *= 500;
    return error;
}

int wldev_get_rssi(
    struct net_device *dev, scb_val_t *scb_val)
{
    int error;

    if (!scb_val)
        return -ENOMEM;
    memset(scb_val, 0, sizeof(scb_val_t));
    error = wldev_ioctl_get(dev, WLC_GET_RSSI, scb_val, sizeof(scb_val_t));
    if (unlikely(error))
        return error;

    return error;
}

int wldev_get_ssid(
    struct net_device *dev, wlc_ssid_t *pssid)
{
    int error;

    if (!pssid)
        return -ENOMEM;
    memset(pssid, 0, sizeof(wlc_ssid_t));
    error = wldev_ioctl_get(dev, WLC_GET_SSID, pssid, sizeof(wlc_ssid_t));
    if (unlikely(error))
        return error;
    pssid->SSID_len = dtoh32(pssid->SSID_len);
    return error;
}

int wldev_get_band(
    struct net_device *dev, uint *pband)
{
    int error;

    *pband = 0;
    error = wldev_ioctl_get(dev, WLC_GET_BAND, pband, sizeof(uint));
    return error;
}

int wldev_set_band(
    struct net_device *dev, uint band)
{
    int error = -1;

    if ((band == WLC_BAND_AUTO) || (band == WLC_BAND_5G) || (band == WLC_BAND_2G)) {
        error = wldev_ioctl_set(dev, WLC_SET_BAND, &band, sizeof(band));
        if (!error)
            dhd_bus_band_set(dev, band);
    }
    return error;
}
int wldev_get_datarate(struct net_device *dev, int *datarate)
{
    int error = 0;

    error = wldev_ioctl_get(dev, WLC_GET_RATE, datarate, sizeof(int));
    if (error) {
        return -1;
    } else {
        *datarate = dtoh32(*datarate);
    }

    return error;
}

#ifdef WL_CFG80211
extern chanspec_t
wl_chspec_driver_to_host(chanspec_t chanspec);
#define WL_EXTRA_BUF_MAX 2048
int wldev_get_mode(
    struct net_device *dev, uint8 *cap, uint8 caplen)
{
    int error = 0;
    int chanspec = 0;
    uint16 band = 0;
    uint16 bandwidth = 0;
    wl_bss_info_t *bss = NULL;
    char* buf = NULL;

    buf = kzalloc(WL_EXTRA_BUF_MAX, GFP_KERNEL);
    if (!buf) {
        WLDEV_ERROR(("%s:ENOMEM\n", __FUNCTION__));
        return -ENOMEM;
    }

    *(u32*) buf = htod32(WL_EXTRA_BUF_MAX);
    error = wldev_ioctl_get(dev, WLC_GET_BSS_INFO, (void*)buf, WL_EXTRA_BUF_MAX);
    if (error) {
        WLDEV_ERROR(("%s:failed:%d\n", __FUNCTION__, error));
        kfree(buf);
        buf = NULL;
        return error;
    }
    bss = (struct  wl_bss_info *)(buf + 4);
    chanspec = wl_chspec_driver_to_host(bss->chanspec);

    band = chanspec & WL_CHANSPEC_BAND_MASK;
    bandwidth = chanspec & WL_CHANSPEC_BW_MASK;

    if (band == WL_CHANSPEC_BAND_2G) {
        if (bss->n_cap)
            strncpy(cap, "n", caplen);
        else
            strncpy(cap, "bg", caplen);
    } else if (band == WL_CHANSPEC_BAND_5G) {
        if (bandwidth == WL_CHANSPEC_BW_80)
            strncpy(cap, "ac", caplen);
        else if ((bandwidth == WL_CHANSPEC_BW_40) || (bandwidth == WL_CHANSPEC_BW_20)) {
            if ((bss->nbss_cap & 0xf00) && (bss->n_cap))
                strncpy(cap, "n|ac", caplen);
            else if (bss->n_cap)
                strncpy(cap, "n", caplen);
            else if (bss->vht_cap)
                strncpy(cap, "ac", caplen);
            else
                strncpy(cap, "a", caplen);
        } else {
            WLDEV_ERROR(("%s:Mode get failed\n", __FUNCTION__));
            error = BCME_ERROR;
        }
    }
    kfree(buf);
    buf = NULL;
    return error;
}
#endif

int wldev_set_country(
    struct net_device *dev, char *country_code, bool notify, bool user_enforced, int revinfo)
{
    int error = -1;
    wl_country_t cspec = {{0}, 0, {0}};
    wl_country_t cur_cspec = {{0}, 0, {0}};    /* current ccode */
    scb_val_t scbval;
#ifdef WL_CFG80211
    struct wireless_dev *wdev = ndev_to_wdev(dev);
    struct wiphy *wiphy = wdev->wiphy;
    struct bcm_cfg80211 *cfg = wiphy_priv(wiphy);
#endif

    if (!country_code)
        return error;

    bzero(&scbval, sizeof(scb_val_t));
    error = wldev_iovar_getbuf(dev, "country", NULL, 0, &cur_cspec, sizeof(wl_country_t), NULL);
    if (error < 0) {
        WLDEV_ERROR(("%s: get country failed = %d\n", __FUNCTION__, error));
        return error;
    }

    cspec.rev = revinfo;
    memcpy(cspec.country_abbrev, country_code, WLC_CNTRY_BUF_SZ);
    memcpy(cspec.ccode, country_code, WLC_CNTRY_BUF_SZ);
    error = dhd_conf_map_country_list(dhd_get_pub(dev), &cspec);
    if (error)
        dhd_get_customized_country_code(dev, (char *)&cspec.country_abbrev, &cspec);

    WLDEV_INFO(("%s: Current country %s rev %d\n",
        __FUNCTION__, cur_cspec.ccode, cur_cspec.rev));

    if ((error < 0) ||
        dhd_force_country_change(dev) ||
        (strncmp(cspec.ccode, cur_cspec.ccode, WLC_CNTRY_BUF_SZ) != 0)) {
        if ((user_enforced)
#ifdef WL_CFG80211
            && (wl_get_drv_status(cfg, CONNECTED, dev))
#endif
        ) {
            bzero(&scbval, sizeof(scb_val_t));
            error = wldev_ioctl_set(dev, WLC_DISASSOC,
                                    &scbval, sizeof(scb_val_t));
            if (error < 0) {
                WLDEV_ERROR(("%s: set country failed due to Disassoc error %d\n",
                    __FUNCTION__, error));
                return error;
            }
        }

        error = dhd_conf_set_country(dhd_get_pub(dev), &cspec);
        if (error < 0) {
            WLDEV_ERROR(("%s: set country for %s as %s rev %d failed\n",
                __FUNCTION__, country_code, cspec.ccode, cspec.rev));
            return error;
        }
        dhd_conf_fix_country(dhd_get_pub(dev));
        dhd_conf_get_country(dhd_get_pub(dev), &cspec);
        dhd_bus_country_set(dev, &cspec, notify);
        printf("%s: set country for %s as %s rev %d\n",
            __FUNCTION__, country_code, cspec.ccode, cspec.rev);
    }
    return 0;
}