479 lines
12 KiB
C
479 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* This file is part of wl1271
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*
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* Copyright (C) 2009-2010 Nokia Corporation
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*
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* Contact: Luciano Coelho <luciano.coelho@nokia.com>
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*/
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#include <linux/ieee80211.h>
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#include <linux/pm_runtime.h>
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#include "wlcore.h"
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#include "debug.h"
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#include "cmd.h"
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#include "scan.h"
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#include "acx.h"
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#include "tx.h"
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void wl1271_scan_complete_work(struct work_struct *work)
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{
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struct delayed_work *dwork;
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struct wl1271 *wl;
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struct wl12xx_vif *wlvif;
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struct cfg80211_scan_info info = {
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.aborted = false,
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};
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int ret;
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dwork = to_delayed_work(work);
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wl = container_of(dwork, struct wl1271, scan_complete_work);
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wl1271_debug(DEBUG_SCAN, "Scanning complete");
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mutex_lock(&wl->mutex);
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if (unlikely(wl->state != WLCORE_STATE_ON))
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goto out;
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if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
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goto out;
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wlvif = wl->scan_wlvif;
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/*
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* Rearm the tx watchdog just before idling scan. This
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* prevents just-finished scans from triggering the watchdog
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*/
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wl12xx_rearm_tx_watchdog_locked(wl);
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wl->scan.state = WL1271_SCAN_STATE_IDLE;
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memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
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wl->scan.req = NULL;
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wl->scan_wlvif = NULL;
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ret = pm_runtime_resume_and_get(wl->dev);
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if (ret < 0)
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goto out;
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if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) {
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/* restore hardware connection monitoring template */
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wl1271_cmd_build_ap_probe_req(wl, wlvif, wlvif->probereq);
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}
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if (wl->scan.failed) {
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wl1271_info("Scan completed due to error.");
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wl12xx_queue_recovery_work(wl);
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}
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wlcore_cmd_regdomain_config_locked(wl);
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pm_runtime_mark_last_busy(wl->dev);
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pm_runtime_put_autosuspend(wl->dev);
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ieee80211_scan_completed(wl->hw, &info);
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out:
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mutex_unlock(&wl->mutex);
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}
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static void wlcore_started_vifs_iter(void *data, u8 *mac,
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struct ieee80211_vif *vif)
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{
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struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
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bool active = false;
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int *count = (int *)data;
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/*
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* count active interfaces according to interface type.
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* checking only bss_conf.idle is bad for some cases, e.g.
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* we don't want to count sta in p2p_find as active interface.
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*/
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switch (wlvif->bss_type) {
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case BSS_TYPE_STA_BSS:
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if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags))
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active = true;
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break;
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case BSS_TYPE_AP_BSS:
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if (wlvif->wl->active_sta_count > 0)
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active = true;
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break;
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default:
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break;
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}
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if (active)
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(*count)++;
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}
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static int wlcore_count_started_vifs(struct wl1271 *wl)
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{
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int count = 0;
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ieee80211_iterate_active_interfaces_atomic(wl->hw,
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IEEE80211_IFACE_ITER_RESUME_ALL,
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wlcore_started_vifs_iter, &count);
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return count;
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}
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static int
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wlcore_scan_get_channels(struct wl1271 *wl,
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struct ieee80211_channel *req_channels[],
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u32 n_channels,
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u32 n_ssids,
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struct conn_scan_ch_params *channels,
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u32 band, bool radar, bool passive,
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int start, int max_channels,
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u8 *n_pactive_ch,
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int scan_type)
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{
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int i, j;
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u32 flags;
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bool force_passive = !n_ssids;
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u32 min_dwell_time_active, max_dwell_time_active;
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u32 dwell_time_passive, dwell_time_dfs;
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/* configure dwell times according to scan type */
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if (scan_type == SCAN_TYPE_SEARCH) {
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struct conf_scan_settings *c = &wl->conf.scan;
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bool active_vif_exists = !!wlcore_count_started_vifs(wl);
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min_dwell_time_active = active_vif_exists ?
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c->min_dwell_time_active :
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c->min_dwell_time_active_long;
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max_dwell_time_active = active_vif_exists ?
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c->max_dwell_time_active :
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c->max_dwell_time_active_long;
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dwell_time_passive = c->dwell_time_passive;
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dwell_time_dfs = c->dwell_time_dfs;
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} else {
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struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
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u32 delta_per_probe;
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if (band == NL80211_BAND_5GHZ)
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delta_per_probe = c->dwell_time_delta_per_probe_5;
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else
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delta_per_probe = c->dwell_time_delta_per_probe;
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min_dwell_time_active = c->base_dwell_time +
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n_ssids * c->num_probe_reqs * delta_per_probe;
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max_dwell_time_active = min_dwell_time_active +
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c->max_dwell_time_delta;
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dwell_time_passive = c->dwell_time_passive;
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dwell_time_dfs = c->dwell_time_dfs;
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}
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min_dwell_time_active = DIV_ROUND_UP(min_dwell_time_active, 1000);
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max_dwell_time_active = DIV_ROUND_UP(max_dwell_time_active, 1000);
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dwell_time_passive = DIV_ROUND_UP(dwell_time_passive, 1000);
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dwell_time_dfs = DIV_ROUND_UP(dwell_time_dfs, 1000);
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for (i = 0, j = start;
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i < n_channels && j < max_channels;
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i++) {
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flags = req_channels[i]->flags;
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if (force_passive)
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flags |= IEEE80211_CHAN_NO_IR;
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if ((req_channels[i]->band == band) &&
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!(flags & IEEE80211_CHAN_DISABLED) &&
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(!!(flags & IEEE80211_CHAN_RADAR) == radar) &&
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/* if radar is set, we ignore the passive flag */
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(radar ||
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!!(flags & IEEE80211_CHAN_NO_IR) == passive)) {
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if (flags & IEEE80211_CHAN_RADAR) {
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channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS;
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channels[j].passive_duration =
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cpu_to_le16(dwell_time_dfs);
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} else {
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channels[j].passive_duration =
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cpu_to_le16(dwell_time_passive);
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}
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channels[j].min_duration =
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cpu_to_le16(min_dwell_time_active);
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channels[j].max_duration =
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cpu_to_le16(max_dwell_time_active);
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channels[j].tx_power_att = req_channels[i]->max_power;
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channels[j].channel = req_channels[i]->hw_value;
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if (n_pactive_ch &&
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(band == NL80211_BAND_2GHZ) &&
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(channels[j].channel >= 12) &&
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(channels[j].channel <= 14) &&
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(flags & IEEE80211_CHAN_NO_IR) &&
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!force_passive) {
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/* pactive channels treated as DFS */
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channels[j].flags = SCAN_CHANNEL_FLAGS_DFS;
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/*
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* n_pactive_ch is counted down from the end of
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* the passive channel list
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*/
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(*n_pactive_ch)++;
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wl1271_debug(DEBUG_SCAN, "n_pactive_ch = %d",
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*n_pactive_ch);
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}
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wl1271_debug(DEBUG_SCAN, "freq %d, ch. %d, flags 0x%x, power %d, min/max_dwell %d/%d%s%s",
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req_channels[i]->center_freq,
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req_channels[i]->hw_value,
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req_channels[i]->flags,
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req_channels[i]->max_power,
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min_dwell_time_active,
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max_dwell_time_active,
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flags & IEEE80211_CHAN_RADAR ?
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", DFS" : "",
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flags & IEEE80211_CHAN_NO_IR ?
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", NO-IR" : "");
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j++;
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}
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}
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return j - start;
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}
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bool
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wlcore_set_scan_chan_params(struct wl1271 *wl,
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struct wlcore_scan_channels *cfg,
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struct ieee80211_channel *channels[],
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u32 n_channels,
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u32 n_ssids,
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int scan_type)
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{
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u8 n_pactive_ch = 0;
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cfg->passive[0] =
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wlcore_scan_get_channels(wl,
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channels,
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n_channels,
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n_ssids,
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cfg->channels_2,
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NL80211_BAND_2GHZ,
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false, true, 0,
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MAX_CHANNELS_2GHZ,
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&n_pactive_ch,
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scan_type);
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cfg->active[0] =
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wlcore_scan_get_channels(wl,
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channels,
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n_channels,
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n_ssids,
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cfg->channels_2,
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NL80211_BAND_2GHZ,
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false, false,
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cfg->passive[0],
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MAX_CHANNELS_2GHZ,
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&n_pactive_ch,
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scan_type);
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cfg->passive[1] =
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wlcore_scan_get_channels(wl,
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channels,
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n_channels,
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n_ssids,
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cfg->channels_5,
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NL80211_BAND_5GHZ,
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false, true, 0,
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wl->max_channels_5,
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&n_pactive_ch,
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scan_type);
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cfg->dfs =
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wlcore_scan_get_channels(wl,
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channels,
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n_channels,
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n_ssids,
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cfg->channels_5,
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NL80211_BAND_5GHZ,
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true, true,
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cfg->passive[1],
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wl->max_channels_5,
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&n_pactive_ch,
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scan_type);
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cfg->active[1] =
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wlcore_scan_get_channels(wl,
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channels,
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n_channels,
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n_ssids,
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cfg->channels_5,
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NL80211_BAND_5GHZ,
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false, false,
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cfg->passive[1] + cfg->dfs,
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wl->max_channels_5,
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&n_pactive_ch,
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scan_type);
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/* 802.11j channels are not supported yet */
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cfg->passive[2] = 0;
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cfg->active[2] = 0;
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cfg->passive_active = n_pactive_ch;
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wl1271_debug(DEBUG_SCAN, " 2.4GHz: active %d passive %d",
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cfg->active[0], cfg->passive[0]);
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wl1271_debug(DEBUG_SCAN, " 5GHz: active %d passive %d",
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cfg->active[1], cfg->passive[1]);
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wl1271_debug(DEBUG_SCAN, " DFS: %d", cfg->dfs);
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return cfg->passive[0] || cfg->active[0] ||
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cfg->passive[1] || cfg->active[1] || cfg->dfs ||
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cfg->passive[2] || cfg->active[2];
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}
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EXPORT_SYMBOL_GPL(wlcore_set_scan_chan_params);
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int wlcore_scan(struct wl1271 *wl, struct ieee80211_vif *vif,
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const u8 *ssid, size_t ssid_len,
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struct cfg80211_scan_request *req)
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{
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struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
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/*
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* cfg80211 should guarantee that we don't get more channels
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* than what we have registered.
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*/
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BUG_ON(req->n_channels > WL1271_MAX_CHANNELS);
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if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
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return -EBUSY;
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wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE;
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if (ssid_len && ssid) {
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wl->scan.ssid_len = ssid_len;
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memcpy(wl->scan.ssid, ssid, ssid_len);
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} else {
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wl->scan.ssid_len = 0;
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}
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wl->scan_wlvif = wlvif;
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wl->scan.req = req;
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memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
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/* we assume failure so that timeout scenarios are handled correctly */
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wl->scan.failed = true;
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ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
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msecs_to_jiffies(WL1271_SCAN_TIMEOUT));
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wl->ops->scan_start(wl, wlvif, req);
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return 0;
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}
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/* Returns the scan type to be used or a negative value on error */
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int
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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);
|