From 52409fae3e4b8d16b68b61902fc09075cd97b75d Mon Sep 17 00:00:00 2001 From: Dominik Sliwa Date: Sun, 2 Jul 2017 16:41:37 +0200 Subject: Backports generated from 4.11 kernel Initial commit. Signed-off-by: Dominik Sliwa --- drivers/net/wireless/ti/wlcore/scan.c | 491 ++++++++++++++++++++++++++++++++++ 1 file changed, 491 insertions(+) create mode 100644 drivers/net/wireless/ti/wlcore/scan.c (limited to 'drivers/net/wireless/ti/wlcore/scan.c') diff --git a/drivers/net/wireless/ti/wlcore/scan.c b/drivers/net/wireless/ti/wlcore/scan.c new file mode 100644 index 0000000..5612f59 --- /dev/null +++ b/drivers/net/wireless/ti/wlcore/scan.c @@ -0,0 +1,491 @@ +/* + * This file is part of wl1271 + * + * Copyright (C) 2009-2010 Nokia Corporation + * + * Contact: Luciano Coelho + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include + +#include "wlcore.h" +#include "debug.h" +#include "cmd.h" +#include "scan.h" +#include "acx.h" +#include "ps.h" +#include "tx.h" + +void wl1271_scan_complete_work(struct work_struct *work) +{ + struct delayed_work *dwork; + struct wl1271 *wl; + struct wl12xx_vif *wlvif; + struct cfg80211_scan_info info = { + .aborted = false, + }; + int ret; + + dwork = to_delayed_work(work); + wl = container_of(dwork, struct wl1271, scan_complete_work); + + wl1271_debug(DEBUG_SCAN, "Scanning complete"); + + mutex_lock(&wl->mutex); + + if (unlikely(wl->state != WLCORE_STATE_ON)) + goto out; + + if (wl->scan.state == WL1271_SCAN_STATE_IDLE) + goto out; + + wlvif = wl->scan_wlvif; + + /* + * Rearm the tx watchdog just before idling scan. This + * prevents just-finished scans from triggering the watchdog + */ + wl12xx_rearm_tx_watchdog_locked(wl); + + wl->scan.state = WL1271_SCAN_STATE_IDLE; + memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch)); + wl->scan.req = NULL; + wl->scan_wlvif = NULL; + + ret = wl1271_ps_elp_wakeup(wl); + if (ret < 0) + goto out; + + if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) { + /* restore hardware connection monitoring template */ + wl1271_cmd_build_ap_probe_req(wl, wlvif, wlvif->probereq); + } + + wl1271_ps_elp_sleep(wl); + + if (wl->scan.failed) { + wl1271_info("Scan completed due to error."); + wl12xx_queue_recovery_work(wl); + } + + wlcore_cmd_regdomain_config_locked(wl); + + ieee80211_scan_completed(wl->hw, &info); + +out: + mutex_unlock(&wl->mutex); + +} + +static void wlcore_started_vifs_iter(void *data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); + bool active = false; + int *count = (int *)data; + + /* + * count active interfaces according to interface type. + * checking only bss_conf.idle is bad for some cases, e.g. + * we don't want to count sta in p2p_find as active interface. + */ + switch (wlvif->bss_type) { + case BSS_TYPE_STA_BSS: + if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) + active = true; + break; + + case BSS_TYPE_AP_BSS: + if (wlvif->wl->active_sta_count > 0) + active = true; + break; + + default: + break; + } + + if (active) + (*count)++; +} + +static int wlcore_count_started_vifs(struct wl1271 *wl) +{ + int count = 0; + + ieee80211_iterate_active_interfaces_atomic(wl->hw, + IEEE80211_IFACE_ITER_RESUME_ALL, + wlcore_started_vifs_iter, &count); + return count; +} + +static int +wlcore_scan_get_channels(struct wl1271 *wl, + struct ieee80211_channel *req_channels[], + u32 n_channels, + u32 n_ssids, + struct conn_scan_ch_params *channels, + u32 band, bool radar, bool passive, + int start, int max_channels, + u8 *n_pactive_ch, + int scan_type) +{ + int i, j; + u32 flags; + bool force_passive = !n_ssids; + u32 min_dwell_time_active, max_dwell_time_active; + u32 dwell_time_passive, dwell_time_dfs; + + /* configure dwell times according to scan type */ + if (scan_type == SCAN_TYPE_SEARCH) { + struct conf_scan_settings *c = &wl->conf.scan; + bool active_vif_exists = !!wlcore_count_started_vifs(wl); + + min_dwell_time_active = active_vif_exists ? + c->min_dwell_time_active : + c->min_dwell_time_active_long; + max_dwell_time_active = active_vif_exists ? + c->max_dwell_time_active : + c->max_dwell_time_active_long; + dwell_time_passive = c->dwell_time_passive; + dwell_time_dfs = c->dwell_time_dfs; + } else { + struct conf_sched_scan_settings *c = &wl->conf.sched_scan; + u32 delta_per_probe; + + if (band == NL80211_BAND_5GHZ) + delta_per_probe = c->dwell_time_delta_per_probe_5; + else + delta_per_probe = c->dwell_time_delta_per_probe; + + min_dwell_time_active = c->base_dwell_time + + n_ssids * c->num_probe_reqs * delta_per_probe; + + max_dwell_time_active = min_dwell_time_active + + c->max_dwell_time_delta; + dwell_time_passive = c->dwell_time_passive; + dwell_time_dfs = c->dwell_time_dfs; + } + min_dwell_time_active = DIV_ROUND_UP(min_dwell_time_active, 1000); + max_dwell_time_active = DIV_ROUND_UP(max_dwell_time_active, 1000); + dwell_time_passive = DIV_ROUND_UP(dwell_time_passive, 1000); + dwell_time_dfs = DIV_ROUND_UP(dwell_time_dfs, 1000); + + for (i = 0, j = start; + i < n_channels && j < max_channels; + i++) { + flags = req_channels[i]->flags; + + if (force_passive) + flags |= IEEE80211_CHAN_NO_IR; + + if ((req_channels[i]->band == band) && + !(flags & IEEE80211_CHAN_DISABLED) && + (!!(flags & IEEE80211_CHAN_RADAR) == radar) && + /* if radar is set, we ignore the passive flag */ + (radar || + !!(flags & IEEE80211_CHAN_NO_IR) == passive)) { + if (flags & IEEE80211_CHAN_RADAR) { + channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS; + + channels[j].passive_duration = + cpu_to_le16(dwell_time_dfs); + } else { + channels[j].passive_duration = + cpu_to_le16(dwell_time_passive); + } + + channels[j].min_duration = + cpu_to_le16(min_dwell_time_active); + channels[j].max_duration = + cpu_to_le16(max_dwell_time_active); + + channels[j].tx_power_att = req_channels[i]->max_power; + channels[j].channel = req_channels[i]->hw_value; + + if (n_pactive_ch && + (band == NL80211_BAND_2GHZ) && + (channels[j].channel >= 12) && + (channels[j].channel <= 14) && + (flags & IEEE80211_CHAN_NO_IR) && + !force_passive) { + /* pactive channels treated as DFS */ + channels[j].flags = SCAN_CHANNEL_FLAGS_DFS; + + /* + * n_pactive_ch is counted down from the end of + * the passive channel list + */ + (*n_pactive_ch)++; + wl1271_debug(DEBUG_SCAN, "n_pactive_ch = %d", + *n_pactive_ch); + } + + wl1271_debug(DEBUG_SCAN, "freq %d, ch. %d, flags 0x%x, power %d, min/max_dwell %d/%d%s%s", + req_channels[i]->center_freq, + req_channels[i]->hw_value, + req_channels[i]->flags, + req_channels[i]->max_power, + min_dwell_time_active, + max_dwell_time_active, + flags & IEEE80211_CHAN_RADAR ? + ", DFS" : "", + flags & IEEE80211_CHAN_NO_IR ? + ", NO-IR" : ""); + j++; + } + } + + return j - start; +} + +bool +wlcore_set_scan_chan_params(struct wl1271 *wl, + struct wlcore_scan_channels *cfg, + struct ieee80211_channel *channels[], + u32 n_channels, + u32 n_ssids, + int scan_type) +{ + u8 n_pactive_ch = 0; + + cfg->passive[0] = + wlcore_scan_get_channels(wl, + channels, + n_channels, + n_ssids, + cfg->channels_2, + NL80211_BAND_2GHZ, + false, true, 0, + MAX_CHANNELS_2GHZ, + &n_pactive_ch, + scan_type); + cfg->active[0] = + wlcore_scan_get_channels(wl, + channels, + n_channels, + n_ssids, + cfg->channels_2, + NL80211_BAND_2GHZ, + false, false, + cfg->passive[0], + MAX_CHANNELS_2GHZ, + &n_pactive_ch, + scan_type); + cfg->passive[1] = + wlcore_scan_get_channels(wl, + channels, + n_channels, + n_ssids, + cfg->channels_5, + NL80211_BAND_5GHZ, + false, true, 0, + wl->max_channels_5, + &n_pactive_ch, + scan_type); + cfg->dfs = + wlcore_scan_get_channels(wl, + channels, + n_channels, + n_ssids, + cfg->channels_5, + NL80211_BAND_5GHZ, + true, true, + cfg->passive[1], + wl->max_channels_5, + &n_pactive_ch, + scan_type); + cfg->active[1] = + wlcore_scan_get_channels(wl, + channels, + n_channels, + n_ssids, + cfg->channels_5, + NL80211_BAND_5GHZ, + false, false, + cfg->passive[1] + cfg->dfs, + wl->max_channels_5, + &n_pactive_ch, + scan_type); + + /* 802.11j channels are not supported yet */ + cfg->passive[2] = 0; + cfg->active[2] = 0; + + cfg->passive_active = n_pactive_ch; + + wl1271_debug(DEBUG_SCAN, " 2.4GHz: active %d passive %d", + cfg->active[0], cfg->passive[0]); + wl1271_debug(DEBUG_SCAN, " 5GHz: active %d passive %d", + cfg->active[1], cfg->passive[1]); + wl1271_debug(DEBUG_SCAN, " DFS: %d", cfg->dfs); + + return cfg->passive[0] || cfg->active[0] || + cfg->passive[1] || cfg->active[1] || cfg->dfs || + cfg->passive[2] || cfg->active[2]; +} +EXPORT_SYMBOL_GPL(wlcore_set_scan_chan_params); + +int wlcore_scan(struct wl1271 *wl, struct ieee80211_vif *vif, + const u8 *ssid, size_t ssid_len, + struct cfg80211_scan_request *req) +{ + struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); + + /* + * cfg80211 should guarantee that we don't get more channels + * than what we have registered. + */ + BUG_ON(req->n_channels > WL1271_MAX_CHANNELS); + + if (wl->scan.state != WL1271_SCAN_STATE_IDLE) + return -EBUSY; + + wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE; + + if (ssid_len && ssid) { + wl->scan.ssid_len = ssid_len; + memcpy(wl->scan.ssid, ssid, ssid_len); + } else { + wl->scan.ssid_len = 0; + } + + wl->scan_wlvif = wlvif; + wl->scan.req = req; + memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch)); + + /* we assume failure so that timeout scenarios are handled correctly */ + wl->scan.failed = true; + ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work, + msecs_to_jiffies(WL1271_SCAN_TIMEOUT)); + + wl->ops->scan_start(wl, wlvif, req); + + return 0; +} +/* Returns the scan type to be used or a negative value on error */ +int +wlcore_scan_sched_scan_ssid_list(struct wl1271 *wl, + struct wl12xx_vif *wlvif, + struct cfg80211_sched_scan_request *req) +{ + struct wl1271_cmd_sched_scan_ssid_list *cmd = NULL; + struct cfg80211_match_set *sets = req->match_sets; + struct cfg80211_ssid *ssids = req->ssids; + int ret = 0, type, i, j, n_match_ssids = 0; + + wl1271_debug((DEBUG_CMD | DEBUG_SCAN), "cmd sched scan ssid list"); + + /* count the match sets that contain SSIDs */ + for (i = 0; i < req->n_match_sets; i++) + if (sets[i].ssid.ssid_len > 0) + n_match_ssids++; + + /* No filter, no ssids or only bcast ssid */ + if (!n_match_ssids && + (!req->n_ssids || + (req->n_ssids == 1 && req->ssids[0].ssid_len == 0))) { + type = SCAN_SSID_FILTER_ANY; + goto out; + } + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (!cmd) { + ret = -ENOMEM; + goto out; + } + + cmd->role_id = wlvif->role_id; + if (!n_match_ssids) { + /* No filter, with ssids */ + type = SCAN_SSID_FILTER_DISABLED; + + for (i = 0; i < req->n_ssids; i++) { + cmd->ssids[cmd->n_ssids].type = (ssids[i].ssid_len) ? + SCAN_SSID_TYPE_HIDDEN : SCAN_SSID_TYPE_PUBLIC; + cmd->ssids[cmd->n_ssids].len = ssids[i].ssid_len; + memcpy(cmd->ssids[cmd->n_ssids].ssid, ssids[i].ssid, + ssids[i].ssid_len); + cmd->n_ssids++; + } + } else { + type = SCAN_SSID_FILTER_LIST; + + /* Add all SSIDs from the filters */ + for (i = 0; i < req->n_match_sets; i++) { + /* ignore sets without SSIDs */ + if (!sets[i].ssid.ssid_len) + continue; + + cmd->ssids[cmd->n_ssids].type = SCAN_SSID_TYPE_PUBLIC; + cmd->ssids[cmd->n_ssids].len = sets[i].ssid.ssid_len; + memcpy(cmd->ssids[cmd->n_ssids].ssid, + sets[i].ssid.ssid, sets[i].ssid.ssid_len); + cmd->n_ssids++; + } + if ((req->n_ssids > 1) || + (req->n_ssids == 1 && req->ssids[0].ssid_len > 0)) { + /* + * Mark all the SSIDs passed in the SSID list as HIDDEN, + * so they're used in probe requests. + */ + for (i = 0; i < req->n_ssids; i++) { + if (!req->ssids[i].ssid_len) + continue; + + for (j = 0; j < cmd->n_ssids; j++) + if ((req->ssids[i].ssid_len == + cmd->ssids[j].len) && + !memcmp(req->ssids[i].ssid, + cmd->ssids[j].ssid, + req->ssids[i].ssid_len)) { + cmd->ssids[j].type = + SCAN_SSID_TYPE_HIDDEN; + break; + } + /* Fail if SSID isn't present in the filters */ + if (j == cmd->n_ssids) { + ret = -EINVAL; + goto out_free; + } + } + } + } + + ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_SSID_CFG, cmd, + sizeof(*cmd), 0); + if (ret < 0) { + wl1271_error("cmd sched scan ssid list failed"); + goto out_free; + } + +out_free: + kfree(cmd); +out: + if (ret < 0) + return ret; + return type; +} +EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_ssid_list); + +void wlcore_scan_sched_scan_results(struct wl1271 *wl) +{ + wl1271_debug(DEBUG_SCAN, "got periodic scan results"); + + ieee80211_sched_scan_results(wl->hw); +} +EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_results); -- cgit v1.2.3