/* SPDX-License-Identifier: GPL-2.0 */
|
/*
|
* Linux roam cache
|
*
|
* Copyright (C) 1999-2019, Broadcom.
|
*
|
* 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: wl_roam.c 798173 2019-01-07 09:23:21Z $
|
*/
|
|
#include <typedefs.h>
|
#include <osl.h>
|
#include <bcmwifi_channels.h>
|
#include <wlioctl.h>
|
#include <bcmutils.h>
|
#ifdef WL_CFG80211
|
#include <wl_cfg80211.h>
|
#endif // endif
|
#include <wldev_common.h>
|
#include <bcmstdlib_s.h>
|
|
#ifdef ESCAN_CHANNEL_CACHE
|
#define MAX_ROAM_CACHE 200
|
#define MAX_SSID_BUFSIZE 36
|
|
#define ROAMSCAN_MODE_NORMAL 0
|
#define ROAMSCAN_MODE_WES 1
|
|
typedef struct {
|
chanspec_t chanspec;
|
int ssid_len;
|
char ssid[MAX_SSID_BUFSIZE];
|
} roam_channel_cache;
|
|
static int n_roam_cache = 0;
|
static int roam_band = WLC_BAND_AUTO;
|
static roam_channel_cache roam_cache[MAX_ROAM_CACHE];
|
static uint band2G, band5G, band_bw;
|
|
#ifdef ROAM_CHANNEL_CACHE
|
int init_roam_cache(struct bcm_cfg80211 *cfg, int ioctl_ver)
|
{
|
int err;
|
struct net_device *dev = bcmcfg_to_prmry_ndev(cfg);
|
s32 mode;
|
|
/* Check support in firmware */
|
err = wldev_iovar_getint(dev, "roamscan_mode", &mode);
|
if (err && (err == BCME_UNSUPPORTED)) {
|
/* If firmware doesn't support, return error. Else proceed */
|
WL_ERR(("roamscan_mode iovar failed. %d\n", err));
|
return err;
|
}
|
|
#ifdef D11AC_IOTYPES
|
if (ioctl_ver == 1) {
|
/* legacy chanspec */
|
band2G = WL_LCHANSPEC_BAND_2G;
|
band5G = WL_LCHANSPEC_BAND_5G;
|
band_bw = WL_LCHANSPEC_BW_20 | WL_LCHANSPEC_CTL_SB_NONE;
|
} else {
|
band2G = WL_CHANSPEC_BAND_2G;
|
band5G = WL_CHANSPEC_BAND_5G;
|
band_bw = WL_CHANSPEC_BW_20;
|
}
|
#else
|
band2G = WL_CHANSPEC_BAND_2G;
|
band5G = WL_CHANSPEC_BAND_5G;
|
band_bw = WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE;
|
#endif /* D11AC_IOTYPES */
|
|
n_roam_cache = 0;
|
roam_band = WLC_BAND_AUTO;
|
|
return 0;
|
}
|
#endif /* ROAM_CHANNEL_CACHE */
|
|
#ifdef ESCAN_CHANNEL_CACHE
|
void set_roam_band(int band)
|
{
|
roam_band = band;
|
}
|
|
void reset_roam_cache(struct bcm_cfg80211 *cfg)
|
{
|
if (!cfg->rcc_enabled) {
|
return;
|
}
|
|
n_roam_cache = 0;
|
}
|
|
void add_roam_cache(struct bcm_cfg80211 *cfg, wl_bss_info_t *bi)
|
{
|
int i;
|
uint8 channel;
|
char chanbuf[CHANSPEC_STR_LEN];
|
|
if (!cfg->rcc_enabled) {
|
return;
|
}
|
|
if (n_roam_cache >= MAX_ROAM_CACHE)
|
return;
|
|
for (i = 0; i < n_roam_cache; i++) {
|
if ((roam_cache[i].ssid_len == bi->SSID_len) &&
|
(roam_cache[i].chanspec == bi->chanspec) &&
|
(memcmp(roam_cache[i].ssid, bi->SSID, bi->SSID_len) == 0)) {
|
/* identical one found, just return */
|
return;
|
}
|
}
|
|
roam_cache[n_roam_cache].ssid_len = bi->SSID_len;
|
channel = wf_chspec_ctlchan(bi->chanspec);
|
WL_DBG(("CHSPEC = %s, CTL %d\n", wf_chspec_ntoa_ex(bi->chanspec, chanbuf), channel));
|
roam_cache[n_roam_cache].chanspec =
|
(channel <= CH_MAX_2G_CHANNEL ? band2G : band5G) | band_bw | channel;
|
(void)memcpy_s(roam_cache[n_roam_cache].ssid, bi->SSID_len, bi->SSID, bi->SSID_len);
|
|
n_roam_cache++;
|
}
|
|
static bool is_duplicated_channel(const chanspec_t *channels, int n_channels, chanspec_t new)
|
{
|
int i;
|
|
for (i = 0; i < n_channels; i++) {
|
if (channels[i] == new)
|
return TRUE;
|
}
|
|
return FALSE;
|
}
|
|
int get_roam_channel_list(int target_chan,
|
chanspec_t *channels, int n_channels, const wlc_ssid_t *ssid, int ioctl_ver)
|
{
|
int i, n = 1;
|
char chanbuf[CHANSPEC_STR_LEN];
|
|
/* first index is filled with the given target channel */
|
if (target_chan) {
|
channels[0] = (target_chan & WL_CHANSPEC_CHAN_MASK) |
|
(target_chan <= CH_MAX_2G_CHANNEL ? band2G : band5G) | band_bw;
|
} else {
|
/* If target channel is not provided, set the index to 0 */
|
n = 0;
|
}
|
|
WL_DBG((" %s: %03d 0x%04X\n", __FUNCTION__, target_chan, channels[0]));
|
|
for (i = 0; i < n_roam_cache; i++) {
|
chanspec_t ch = roam_cache[i].chanspec;
|
bool is_2G = ioctl_ver == 1 ? LCHSPEC_IS2G(ch) : CHSPEC_IS2G(ch);
|
bool is_5G = ioctl_ver == 1 ? LCHSPEC_IS5G(ch) : CHSPEC_IS5G(ch);
|
bool band_match = ((roam_band == WLC_BAND_AUTO) ||
|
((roam_band == WLC_BAND_2G) && is_2G) ||
|
((roam_band == WLC_BAND_5G) && is_5G));
|
|
ch = CHSPEC_CHANNEL(ch) | (is_2G ? band2G : band5G) | band_bw;
|
if ((roam_cache[i].ssid_len == ssid->SSID_len) &&
|
band_match && !is_duplicated_channel(channels, n, ch) &&
|
(memcmp(roam_cache[i].ssid, ssid->SSID, ssid->SSID_len) == 0)) {
|
/* match found, add it */
|
WL_DBG(("%s: Chanspec = %s\n", __FUNCTION__,
|
wf_chspec_ntoa_ex(ch, chanbuf)));
|
channels[n++] = ch;
|
if (n >= n_channels) {
|
WL_ERR(("Too many roam scan channels\n"));
|
return n;
|
}
|
}
|
}
|
|
return n;
|
}
|
#endif /* ESCAN_CHANNEL_CACHE */
|
|
#ifdef ROAM_CHANNEL_CACHE
|
void print_roam_cache(struct bcm_cfg80211 *cfg)
|
{
|
int i;
|
|
if (!cfg->rcc_enabled) {
|
return;
|
}
|
|
WL_DBG((" %d cache\n", n_roam_cache));
|
|
for (i = 0; i < n_roam_cache; i++) {
|
roam_cache[i].ssid[roam_cache[i].ssid_len] = 0;
|
WL_DBG(("0x%02X %02d %s\n", roam_cache[i].chanspec,
|
roam_cache[i].ssid_len, roam_cache[i].ssid));
|
}
|
}
|
|
static void add_roamcache_channel(wl_roam_channel_list_t *channels, chanspec_t ch)
|
{
|
int i;
|
|
if (channels->n >= MAX_ROAM_CHANNEL) /* buffer full */
|
return;
|
|
for (i = 0; i < channels->n; i++) {
|
if (channels->channels[i] == ch) /* already in the list */
|
return;
|
}
|
|
channels->channels[i] = ch;
|
channels->n++;
|
|
WL_DBG((" RCC: %02d 0x%04X\n",
|
ch & WL_CHANSPEC_CHAN_MASK, ch));
|
}
|
|
void update_roam_cache(struct bcm_cfg80211 *cfg, int ioctl_ver)
|
{
|
int error, i, prev_channels;
|
wl_roam_channel_list_t channel_list;
|
char iobuf[WLC_IOCTL_SMLEN];
|
struct net_device *dev = bcmcfg_to_prmry_ndev(cfg);
|
wlc_ssid_t ssid;
|
|
if (!cfg->rcc_enabled) {
|
return;
|
}
|
|
if (!wl_get_drv_status(cfg, CONNECTED, dev)) {
|
WL_DBG(("Not associated\n"));
|
return;
|
}
|
|
/* need to read out the current cache list
|
as the firmware may change dynamically
|
*/
|
error = wldev_iovar_getbuf(dev, "roamscan_channels", 0, 0,
|
(void *)&channel_list, sizeof(channel_list), NULL);
|
if (error) {
|
WL_ERR(("Failed to get roamscan channels, error = %d\n", error));
|
return;
|
}
|
|
error = wldev_get_ssid(dev, &ssid);
|
if (error) {
|
WL_ERR(("Failed to get SSID, err=%d\n", error));
|
return;
|
}
|
|
prev_channels = channel_list.n;
|
for (i = 0; i < n_roam_cache; i++) {
|
chanspec_t ch = roam_cache[i].chanspec;
|
bool is_2G = ioctl_ver == 1 ? LCHSPEC_IS2G(ch) : CHSPEC_IS2G(ch);
|
bool is_5G = ioctl_ver == 1 ? LCHSPEC_IS5G(ch) : CHSPEC_IS5G(ch);
|
bool band_match = ((roam_band == WLC_BAND_AUTO) ||
|
((roam_band == WLC_BAND_2G) && is_2G) ||
|
((roam_band == WLC_BAND_5G) && is_5G));
|
|
if ((roam_cache[i].ssid_len == ssid.SSID_len) &&
|
band_match && (memcmp(roam_cache[i].ssid, ssid.SSID, ssid.SSID_len) == 0)) {
|
/* match found, add it */
|
ch = CHSPEC_CHANNEL(ch) | (is_2G ? band2G : band5G) | band_bw;
|
add_roamcache_channel(&channel_list, ch);
|
}
|
}
|
if (prev_channels != channel_list.n) {
|
/* channel list updated */
|
error = wldev_iovar_setbuf(dev, "roamscan_channels", &channel_list,
|
sizeof(channel_list), iobuf, sizeof(iobuf), NULL);
|
if (error) {
|
WL_ERR(("Failed to update roamscan channels, error = %d\n", error));
|
}
|
}
|
|
WL_DBG(("%d AP, %d cache item(s), err=%d\n", n_roam_cache, channel_list.n, error));
|
}
|
|
void wl_update_roamscan_cache_by_band(struct net_device *dev, int band)
|
{
|
int i, error, ioctl_ver, wes_mode;
|
wl_roam_channel_list_t chanlist_before, chanlist_after;
|
char iobuf[WLC_IOCTL_SMLEN];
|
|
roam_band = band;
|
|
error = wldev_iovar_getint(dev, "roamscan_mode", &wes_mode);
|
if (error) {
|
WL_ERR(("Failed to get roamscan mode, error = %d\n", error));
|
return;
|
}
|
|
ioctl_ver = wl_cfg80211_get_ioctl_version();
|
/* in case of WES mode, update channel list by band based on the cache in DHD */
|
if (wes_mode) {
|
int n = 0;
|
chanlist_before.n = n_roam_cache;
|
|
for (n = 0; n < n_roam_cache; n++) {
|
chanspec_t ch = roam_cache[n].chanspec;
|
bool is_2G = ioctl_ver == 1 ? LCHSPEC_IS2G(ch) : CHSPEC_IS2G(ch);
|
chanlist_before.channels[n] = CHSPEC_CHANNEL(ch) |
|
(is_2G ? band2G : band5G) | band_bw;
|
}
|
} else {
|
if (band == WLC_BAND_AUTO) {
|
return;
|
}
|
error = wldev_iovar_getbuf(dev, "roamscan_channels", 0, 0,
|
(void *)&chanlist_before, sizeof(wl_roam_channel_list_t), NULL);
|
if (error) {
|
WL_ERR(("Failed to get roamscan channels, error = %d\n", error));
|
return;
|
}
|
}
|
chanlist_after.n = 0;
|
/* filtering by the given band */
|
for (i = 0; i < chanlist_before.n; i++) {
|
chanspec_t chspec = chanlist_before.channels[i];
|
bool is_2G = ioctl_ver == 1 ? LCHSPEC_IS2G(chspec) : CHSPEC_IS2G(chspec);
|
bool is_5G = ioctl_ver == 1 ? LCHSPEC_IS5G(chspec) : CHSPEC_IS5G(chspec);
|
bool band_match = ((band == WLC_BAND_AUTO) ||
|
((band == WLC_BAND_2G) && is_2G) ||
|
((band == WLC_BAND_5G) && is_5G));
|
if (band_match) {
|
chanlist_after.channels[chanlist_after.n++] = chspec;
|
}
|
}
|
|
if (wes_mode) {
|
/* need to set ROAMSCAN_MODE_NORMAL to update roamscan_channels,
|
* otherwise, it won't be updated
|
*/
|
wldev_iovar_setint(dev, "roamscan_mode", ROAMSCAN_MODE_NORMAL);
|
|
error = wldev_iovar_setbuf(dev, "roamscan_channels", &chanlist_after,
|
sizeof(wl_roam_channel_list_t), iobuf, sizeof(iobuf), NULL);
|
if (error) {
|
WL_ERR(("Failed to update roamscan channels, error = %d\n", error));
|
}
|
wldev_iovar_setint(dev, "roamscan_mode", ROAMSCAN_MODE_WES);
|
} else {
|
if (chanlist_before.n == chanlist_after.n) {
|
return;
|
}
|
error = wldev_iovar_setbuf(dev, "roamscan_channels", &chanlist_after,
|
sizeof(wl_roam_channel_list_t), iobuf, sizeof(iobuf), NULL);
|
if (error) {
|
WL_ERR(("Failed to update roamscan channels, error = %d\n", error));
|
}
|
}
|
}
|
#endif /* ROAM_CHANNEL_CACHE */
|
#endif /* ESCAN_CHANNEL_CACHE */
|
