/*
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* Linux roam cache
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*
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* Portions of this code are copyright (c) 2022 Cypress Semiconductor Corporation
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*
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* Copyright (C) 1999-2017, Broadcom Corporation
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*
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* Unless you and Broadcom execute a separate written software license
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* agreement governing use of this software, this software is licensed to you
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* under the terms of the GNU General Public License version 2 (the "GPL"),
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* available at http://www.broadcom.com/licenses/GPLv2.php, with the
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* following added to such license:
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*
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* As a special exception, the copyright holders of this software give you
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* permission to link this software with independent modules, and to copy and
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* distribute the resulting executable under terms of your choice, provided that
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* you also meet, for each linked independent module, the terms and conditions of
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* the license of that module. An independent module is a module which is not
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* derived from this software. The special exception does not apply to any
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* modifications of the software.
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*
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* Notwithstanding the above, under no circumstances may you combine this
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* software in any way with any other Broadcom software provided under a license
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* other than the GPL, without Broadcom's express prior written consent.
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*
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*
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* <<Broadcom-WL-IPTag/Open:>>
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*
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* $Id: wl_roam.c 798173 2019-01-07 09:23:21Z $
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*/
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#include <typedefs.h>
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#include <osl.h>
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#include <bcmwifi_channels.h>
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#include <wlioctl.h>
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#include <bcmutils.h>
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#ifdef WL_CFG80211
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#include <wl_cfg80211.h>
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#endif // endif
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#include <wldev_common.h>
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#include <bcmstdlib_s.h>
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#ifdef ESCAN_CHANNEL_CACHE
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#define MAX_ROAM_CACHE 200
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#define MAX_SSID_BUFSIZE 36
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#define ROAMSCAN_MODE_NORMAL 0
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#define ROAMSCAN_MODE_WES 1
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typedef struct {
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chanspec_t chanspec;
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int ssid_len;
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char ssid[MAX_SSID_BUFSIZE];
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} roam_channel_cache;
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static int n_roam_cache = 0;
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static int roam_band = WLC_BAND_AUTO;
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static roam_channel_cache roam_cache[MAX_ROAM_CACHE];
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static uint band2G, band5G, band6G, band_bw;
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#ifdef WES_SUPPORT
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static int roamscan_mode = ROAMSCAN_MODE_NORMAL;
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#endif /* WES_SUPPORT */
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#ifdef ROAM_CHANNEL_CACHE
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int init_roam_cache(struct bcm_cfg80211 *cfg, int ioctl_ver)
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{
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int err;
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struct net_device *dev = bcmcfg_to_prmry_ndev(cfg);
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s32 mode;
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/* Check support in firmware */
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err = wldev_iovar_getint(dev, "roamscan_mode", &mode);
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if (err && (err == BCME_UNSUPPORTED)) {
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/* If firmware doesn't support, return error. Else proceed */
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WL_ERR(("roamscan_mode iovar failed. %d\n", err));
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return err;
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}
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#ifdef D11AC_IOTYPES
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if (ioctl_ver == 1) {
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/* legacy chanspec */
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band2G = WL_LCHANSPEC_BAND_2G;
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band5G = WL_LCHANSPEC_BAND_5G;
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band_bw = WL_LCHANSPEC_BW_20 | WL_LCHANSPEC_CTL_SB_NONE;
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} else {
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band2G = WL_CHANSPEC_BAND_2G;
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band5G = WL_CHANSPEC_BAND_5G;
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band6G = WL_CHANSPEC_BAND_6G;
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band_bw = WL_CHANSPEC_BW_20;
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}
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#else
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band2G = WL_CHANSPEC_BAND_2G;
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band5G = WL_CHANSPEC_BAND_5G;
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band6G = WL_CHANSPEC_BAND_6G;
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band_bw = WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE;
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#endif /* D11AC_IOTYPES */
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n_roam_cache = 0;
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roam_band = WLC_BAND_AUTO;
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#ifdef WES_SUPPORT
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roamscan_mode = ROAMSCAN_MODE_NORMAL;
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#endif /* WES_SUPPORT */
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return 0;
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}
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#endif /* ROAM_CHANNEL_CACHE */
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#ifdef WES_SUPPORT
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int get_roamscan_mode(struct net_device *dev, int *mode)
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{
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*mode = roamscan_mode;
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return 0;
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}
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int set_roamscan_mode(struct net_device *dev, int mode)
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{
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int error = 0;
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roamscan_mode = mode;
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n_roam_cache = 0;
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error = wldev_iovar_setint(dev, "roamscan_mode", mode);
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if (error) {
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WL_ERR(("Failed to set roamscan mode to %d, error = %d\n", mode, error));
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}
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return error;
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}
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int get_roamscan_channel_list(struct net_device *dev, unsigned char channels[],
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int n_channels)
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{
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int n = 0;
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int max_channel_number = MIN(n_channels, n_roam_cache);
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if (roamscan_mode == ROAMSCAN_MODE_WES) {
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for (n = 0; n < max_channel_number; n++) {
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channels[n] = roam_cache[n].chanspec & WL_CHANSPEC_CHAN_MASK;
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WL_DBG(("channel[%d] - [%02d] \n", n, channels[n]));
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}
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}
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return n;
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}
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int set_roamscan_channel_list(struct net_device *dev,
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unsigned char n, unsigned char channels[], int ioctl_ver)
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{
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int i;
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int error;
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wl_roam_channel_list_t channel_list;
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char iobuf[WLC_IOCTL_SMLEN];
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roamscan_mode = ROAMSCAN_MODE_WES;
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if (n > MAX_ROAM_CHANNEL)
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n = MAX_ROAM_CHANNEL;
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for (i = 0; i < n; i++) {
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chanspec_t chanspec;
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if (channels[i] <= CH_MAX_2G_CHANNEL) {
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chanspec = band2G | band_bw | channels[i];
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} else {
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chanspec = band5G | band_bw | channels[i];
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}
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roam_cache[i].chanspec = chanspec;
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channel_list.channels[i] = chanspec;
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WL_DBG(("channel[%d] - [%02d] \n", i, channels[i]));
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}
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n_roam_cache = n;
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channel_list.n = n;
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/* need to set ROAMSCAN_MODE_NORMAL to update roamscan_channels,
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* otherwise, it won't be updated
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*/
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error = wldev_iovar_setint(dev, "roamscan_mode", ROAMSCAN_MODE_NORMAL);
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if (error) {
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WL_ERR(("Failed to set roamscan mode to %d, error = %d\n",
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ROAMSCAN_MODE_NORMAL, error));
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return error;
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}
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error = wldev_iovar_setbuf(dev, "roamscan_channels", &channel_list,
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sizeof(channel_list), iobuf, sizeof(iobuf), NULL);
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if (error) {
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WL_ERR(("Failed to set roamscan channels, error = %d\n", error));
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return error;
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}
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error = wldev_iovar_setint(dev, "roamscan_mode", ROAMSCAN_MODE_WES);
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if (error) {
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WL_ERR(("Failed to set roamscan mode to %d, error = %d\n",
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ROAMSCAN_MODE_WES, error));
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}
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return error;
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}
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#endif /* WES_SUPPORT */
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#ifdef ESCAN_CHANNEL_CACHE
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void set_roam_band(int band)
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{
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roam_band = band;
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}
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void reset_roam_cache(struct bcm_cfg80211 *cfg)
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{
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if (!cfg->rcc_enabled) {
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return;
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}
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#ifdef WES_SUPPORT
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if (roamscan_mode == ROAMSCAN_MODE_WES)
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return;
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#endif /* WES_SUPPORT */
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n_roam_cache = 0;
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}
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void add_roam_cache(struct bcm_cfg80211 *cfg, wl_bss_info_t *bi)
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{
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int i;
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uint8 channel;
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char chanbuf[CHANSPEC_STR_LEN];
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if (!cfg->rcc_enabled) {
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return;
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}
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#ifdef WES_SUPPORT
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if (roamscan_mode == ROAMSCAN_MODE_WES)
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return;
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#endif /* WES_SUPPORT */
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if (n_roam_cache >= MAX_ROAM_CACHE)
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return;
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for (i = 0; i < n_roam_cache; i++) {
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if ((roam_cache[i].ssid_len == bi->SSID_len) &&
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(roam_cache[i].chanspec == bi->chanspec) &&
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(memcmp(roam_cache[i].ssid, bi->SSID, bi->SSID_len) == 0)) {
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/* identical one found, just return */
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return;
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}
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}
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roam_cache[n_roam_cache].ssid_len = bi->SSID_len;
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channel = wf_chspec_ctlchan(bi->chanspec);
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WL_DBG(("CHSPEC = %s, CTL %d\n", wf_chspec_ntoa_ex(bi->chanspec, chanbuf), channel));
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roam_cache[n_roam_cache].chanspec =
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(CHSPEC_IS6G(wl_chspec_driver_to_host(bi->chanspec))?
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band6G : (channel <= CH_MAX_2G_CHANNEL ? band2G : band5G)) | band_bw | channel;
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(void)memcpy_s(roam_cache[n_roam_cache].ssid, bi->SSID_len, bi->SSID, bi->SSID_len);
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n_roam_cache++;
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}
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static bool is_duplicated_channel(const chanspec_t *channels, int n_channels, chanspec_t new)
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{
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int i;
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for (i = 0; i < n_channels; i++) {
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if (channels[i] == new)
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return TRUE;
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}
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return FALSE;
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}
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int get_roam_channel_list(int target_chan,
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chanspec_t *channels, int n_channels, const wlc_ssid_t *ssid, int ioctl_ver,
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struct ieee80211_channel *chan)
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{
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int i, n = 1;
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char chanbuf[CHANSPEC_STR_LEN];
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/* first index is filled with the given target channel */
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if (target_chan) {
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channels[0] = (target_chan & WL_CHANSPEC_CHAN_MASK) |
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(chan->center_freq > FREQ_START_6G_CHANNEL ?
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band6G : (target_chan <= CH_MAX_2G_CHANNEL ? band2G : band5G)) | band_bw;
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} else {
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/* If target channel is not provided, set the index to 0 */
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n = 0;
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}
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WL_DBG((" %s: %03d 0x%04X\n", __FUNCTION__, target_chan, channels[0]));
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#ifdef WES_SUPPORT
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if (roamscan_mode == ROAMSCAN_MODE_WES) {
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for (i = 0; i < n_roam_cache; i++) {
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chanspec_t ch = roam_cache[i].chanspec;
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bool is_2G = ioctl_ver == 1 ? LCHSPEC_IS2G(ch) : CHSPEC_IS2G(ch);
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bool is_5G = ioctl_ver == 1 ? LCHSPEC_IS5G(ch) : CHSPEC_IS5G(ch);
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bool is_6G = CHSPEC_IS6G(ch);
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bool band_match = ((roam_band == WLC_BAND_AUTO) ||
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((roam_band == WLC_BAND_2G) && is_2G) ||
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((roam_band == WLC_BAND_5G) && is_5G) ||
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((roam_band == WLC_BAND_6G) && is_6G));
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ch = CHSPEC_CHANNEL(ch) | (is_2G ? band2G : band5G) | band_bw;
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ch = CHSPEC_CHANNEL(ch) |
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(is_6G ? band6G : (is_2G ? band2G : band5G)) | band_bw;
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if (band_match && !is_duplicated_channel(channels, n, ch)) {
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WL_DBG(("%s: Chanspec = %s\n", __FUNCTION__,
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wf_chspec_ntoa_ex(ch, chanbuf)));
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channels[n++] = ch;
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if (n >= n_channels) {
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WL_ERR(("Too many roam scan channels\n"));
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return n;
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}
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}
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}
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return n;
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}
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#endif /* WES_SUPPORT */
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for (i = 0; i < n_roam_cache; i++) {
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chanspec_t ch = roam_cache[i].chanspec;
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bool is_2G = ioctl_ver == 1 ? LCHSPEC_IS2G(ch) : CHSPEC_IS2G(ch);
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bool is_5G = ioctl_ver == 1 ? LCHSPEC_IS5G(ch) : CHSPEC_IS5G(ch);
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bool is_6G = CHSPEC_IS6G(ch);
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bool band_match = ((roam_band == WLC_BAND_AUTO) ||
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((roam_band == WLC_BAND_2G) && is_2G) ||
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((roam_band == WLC_BAND_5G) && is_5G) ||
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((roam_band == WLC_BAND_6G) && is_6G));
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ch = CHSPEC_CHANNEL(ch) | (is_6G ? band6G : (is_2G ? band2G : band5G)) | band_bw;
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if ((roam_cache[i].ssid_len == ssid->SSID_len) &&
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band_match && !is_duplicated_channel(channels, n, ch) &&
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(memcmp(roam_cache[i].ssid, ssid->SSID, ssid->SSID_len) == 0)) {
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/* match found, add it */
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WL_DBG(("%s: Chanspec = %s\n", __FUNCTION__,
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wf_chspec_ntoa_ex(ch, chanbuf)));
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channels[n++] = ch;
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if (n >= n_channels) {
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WL_ERR(("Too many roam scan channels\n"));
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return n;
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}
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}
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}
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return n;
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}
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#endif /* ESCAN_CHANNEL_CACHE */
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#ifdef ROAM_CHANNEL_CACHE
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void print_roam_cache(struct bcm_cfg80211 *cfg)
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{
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int i;
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if (!cfg->rcc_enabled) {
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return;
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}
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WL_DBG((" %d cache\n", n_roam_cache));
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for (i = 0; i < n_roam_cache; i++) {
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roam_cache[i].ssid[roam_cache[i].ssid_len] = 0;
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WL_DBG(("0x%02X %02d %s\n", roam_cache[i].chanspec,
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roam_cache[i].ssid_len, roam_cache[i].ssid));
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}
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}
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static void add_roamcache_channel(wl_roam_channel_list_t *channels, chanspec_t ch)
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{
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int i;
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if (channels->n >= MAX_ROAM_CHANNEL) /* buffer full */
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return;
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for (i = 0; i < channels->n; i++) {
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if (channels->channels[i] == ch) /* already in the list */
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return;
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}
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channels->channels[i] = ch;
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channels->n++;
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WL_DBG((" RCC: %02d 0x%04X\n",
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ch & WL_CHANSPEC_CHAN_MASK, ch));
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}
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void update_roam_cache(struct bcm_cfg80211 *cfg, int ioctl_ver)
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{
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int error, i, prev_channels;
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wl_roam_channel_list_t channel_list;
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char iobuf[WLC_IOCTL_SMLEN];
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struct net_device *dev = bcmcfg_to_prmry_ndev(cfg);
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wlc_ssid_t ssid;
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if (!cfg->rcc_enabled) {
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return;
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}
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#ifdef WES_SUPPORT
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if (roamscan_mode == ROAMSCAN_MODE_WES) {
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/* no update when ROAMSCAN_MODE_WES */
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return;
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}
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#endif /* WES_SUPPORT */
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if (!wl_get_drv_status(cfg, CONNECTED, dev)) {
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WL_DBG(("Not associated\n"));
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return;
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}
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/* need to read out the current cache list
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as the firmware may change dynamically
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*/
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error = wldev_iovar_getbuf(dev, "roamscan_channels", 0, 0,
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(void *)&channel_list, sizeof(channel_list), NULL);
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if (error) {
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WL_ERR(("Failed to get roamscan channels, error = %d\n", error));
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return;
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}
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error = wldev_get_ssid(dev, &ssid);
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if (error) {
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WL_ERR(("Failed to get SSID, err=%d\n", error));
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return;
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}
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prev_channels = channel_list.n;
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for (i = 0; i < n_roam_cache; i++) {
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chanspec_t ch = roam_cache[i].chanspec;
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bool is_2G = ioctl_ver == 1 ? LCHSPEC_IS2G(ch) : CHSPEC_IS2G(ch);
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bool is_5G = ioctl_ver == 1 ? LCHSPEC_IS5G(ch) : CHSPEC_IS5G(ch);
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bool is_6G = CHSPEC_IS6G(ch);
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bool band_match = ((roam_band == WLC_BAND_AUTO) ||
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((roam_band == WLC_BAND_2G) && is_2G) ||
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((roam_band == WLC_BAND_5G) && is_5G) ||
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((roam_band == WLC_BAND_6G) && is_6G));
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if ((roam_cache[i].ssid_len == ssid.SSID_len) &&
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band_match && (memcmp(roam_cache[i].ssid, ssid.SSID, ssid.SSID_len) == 0)) {
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/* match found, add it */
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ch = CHSPEC_CHANNEL(ch) |
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(is_6G ? band6G : (is_2G ? band2G : band5G)) | band_bw;
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add_roamcache_channel(&channel_list, ch);
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}
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}
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if (prev_channels != channel_list.n) {
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/* channel list updated */
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error = wldev_iovar_setbuf(dev, "roamscan_channels", &channel_list,
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sizeof(channel_list), iobuf, sizeof(iobuf), NULL);
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if (error) {
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WL_ERR(("Failed to update roamscan channels, error = %d\n", error));
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}
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}
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WL_DBG(("%d AP, %d cache item(s), err=%d\n", n_roam_cache, channel_list.n, error));
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}
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void wl_update_roamscan_cache_by_band(struct net_device *dev, int band)
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{
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int i, error, ioctl_ver, wes_mode;
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wl_roam_channel_list_t chanlist_before, chanlist_after;
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char iobuf[WLC_IOCTL_SMLEN];
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roam_band = band;
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error = wldev_iovar_getint(dev, "roamscan_mode", &wes_mode);
|
if (error) {
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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++) {
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chanspec_t ch = roam_cache[n].chanspec;
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bool is_2G = ioctl_ver == 1 ? LCHSPEC_IS2G(ch) : CHSPEC_IS2G(ch);
|
bool is_6G = CHSPEC_IS6G(ch);
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chanlist_before.channels[n] = CHSPEC_CHANNEL(ch) |
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(is_6G ? band6G : (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 is_6G = CHSPEC_IS6G(chspec);
|
bool band_match = ((band == WLC_BAND_AUTO) ||
|
((band == WLC_BAND_2G) && is_2G) ||
|
((band == WLC_BAND_5G) && is_5G) ||
|
((band == WLC_BAND_6G) && is_6G));
|
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 */
|
