| /* |
| * This file is part of wl1271 |
| * |
| * Copyright (C) 2009-2010 Nokia Corporation |
| * |
| * Contact: Luciano Coelho <luciano.coelho@nokia.com> |
| * |
| * 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 <linux/ieee80211.h> |
| |
| #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); |