499 lines
13 KiB
C
499 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* This file is part of wl12xx
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*
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* Copyright (C) 2012 Texas Instruments. All rights reserved.
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*/
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#include <linux/ieee80211.h>
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#include "scan.h"
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#include "../wlcore/debug.h"
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#include "../wlcore/tx.h"
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static int wl1271_get_scan_channels(struct wl1271 *wl,
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struct cfg80211_scan_request *req,
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struct basic_scan_channel_params *channels,
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enum nl80211_band band, bool passive)
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{
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struct conf_scan_settings *c = &wl->conf.scan;
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int i, j;
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u32 flags;
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for (i = 0, j = 0;
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i < req->n_channels && j < WL1271_SCAN_MAX_CHANNELS;
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i++) {
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flags = req->channels[i]->flags;
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if (!test_bit(i, wl->scan.scanned_ch) &&
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!(flags & IEEE80211_CHAN_DISABLED) &&
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(req->channels[i]->band == band) &&
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/*
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* In passive scans, we scan all remaining
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* channels, even if not marked as such.
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* In active scans, we only scan channels not
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* marked as passive.
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*/
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(passive || !(flags & IEEE80211_CHAN_NO_IR))) {
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wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ",
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req->channels[i]->band,
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req->channels[i]->center_freq);
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wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X",
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req->channels[i]->hw_value,
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req->channels[i]->flags);
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wl1271_debug(DEBUG_SCAN,
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"max_antenna_gain %d, max_power %d",
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req->channels[i]->max_antenna_gain,
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req->channels[i]->max_power);
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wl1271_debug(DEBUG_SCAN, "beacon_found %d",
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req->channels[i]->beacon_found);
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if (!passive) {
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channels[j].min_duration =
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cpu_to_le32(c->min_dwell_time_active);
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channels[j].max_duration =
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cpu_to_le32(c->max_dwell_time_active);
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} else {
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channels[j].min_duration =
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cpu_to_le32(c->dwell_time_passive);
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channels[j].max_duration =
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cpu_to_le32(c->dwell_time_passive);
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}
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channels[j].early_termination = 0;
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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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memset(&channels[j].bssid_lsb, 0xff, 4);
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memset(&channels[j].bssid_msb, 0xff, 2);
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/* Mark the channels we already used */
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set_bit(i, wl->scan.scanned_ch);
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j++;
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}
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}
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return j;
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}
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#define WL1271_NOTHING_TO_SCAN 1
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static int wl1271_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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enum nl80211_band band,
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bool passive, u32 basic_rate)
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{
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struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
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struct wl1271_cmd_scan *cmd;
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struct wl1271_cmd_trigger_scan_to *trigger;
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int ret;
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u16 scan_options = 0;
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/* skip active scans if we don't have SSIDs */
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if (!passive && wl->scan.req->n_ssids == 0)
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return WL1271_NOTHING_TO_SCAN;
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cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
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trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
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if (!cmd || !trigger) {
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ret = -ENOMEM;
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goto out;
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}
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if (wl->conf.scan.split_scan_timeout)
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scan_options |= WL1271_SCAN_OPT_SPLIT_SCAN;
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if (passive)
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scan_options |= WL1271_SCAN_OPT_PASSIVE;
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/* scan on the dev role if the regular one is not started */
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if (wlcore_is_p2p_mgmt(wlvif))
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cmd->params.role_id = wlvif->dev_role_id;
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else
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cmd->params.role_id = wlvif->role_id;
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if (WARN_ON(cmd->params.role_id == WL12XX_INVALID_ROLE_ID)) {
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ret = -EINVAL;
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goto out;
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}
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cmd->params.scan_options = cpu_to_le16(scan_options);
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cmd->params.n_ch = wl1271_get_scan_channels(wl, wl->scan.req,
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cmd->channels,
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band, passive);
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if (cmd->params.n_ch == 0) {
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ret = WL1271_NOTHING_TO_SCAN;
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goto out;
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}
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cmd->params.tx_rate = cpu_to_le32(basic_rate);
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cmd->params.n_probe_reqs = wl->conf.scan.num_probe_reqs;
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cmd->params.tid_trigger = CONF_TX_AC_ANY_TID;
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cmd->params.scan_tag = WL1271_SCAN_DEFAULT_TAG;
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if (band == NL80211_BAND_2GHZ)
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cmd->params.band = WL1271_SCAN_BAND_2_4_GHZ;
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else
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cmd->params.band = WL1271_SCAN_BAND_5_GHZ;
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if (wl->scan.ssid_len) {
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cmd->params.ssid_len = wl->scan.ssid_len;
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memcpy(cmd->params.ssid, wl->scan.ssid, wl->scan.ssid_len);
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}
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memcpy(cmd->addr, vif->addr, ETH_ALEN);
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ret = wl12xx_cmd_build_probe_req(wl, wlvif,
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cmd->params.role_id, band,
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wl->scan.ssid, wl->scan.ssid_len,
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wl->scan.req->ie,
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wl->scan.req->ie_len, NULL, 0, false);
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if (ret < 0) {
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wl1271_error("PROBE request template failed");
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goto out;
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}
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trigger->timeout = cpu_to_le32(wl->conf.scan.split_scan_timeout);
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ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
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sizeof(*trigger), 0);
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if (ret < 0) {
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wl1271_error("trigger scan to failed for hw scan");
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goto out;
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}
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wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
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ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
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if (ret < 0) {
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wl1271_error("SCAN failed");
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goto out;
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}
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out:
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kfree(cmd);
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kfree(trigger);
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return ret;
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}
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int wl12xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
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{
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struct wl1271_cmd_header *cmd = NULL;
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int ret = 0;
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if (WARN_ON(wl->scan.state == WL1271_SCAN_STATE_IDLE))
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return -EINVAL;
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wl1271_debug(DEBUG_CMD, "cmd scan stop");
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cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
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if (!cmd) {
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ret = -ENOMEM;
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goto out;
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}
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ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, cmd,
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sizeof(*cmd), 0);
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if (ret < 0) {
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wl1271_error("cmd stop_scan failed");
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goto out;
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}
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out:
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kfree(cmd);
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return ret;
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}
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void wl1271_scan_stm(struct wl1271 *wl, struct wl12xx_vif *wlvif)
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{
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int ret = 0;
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enum nl80211_band band;
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u32 rate, mask;
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switch (wl->scan.state) {
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case WL1271_SCAN_STATE_IDLE:
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break;
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case WL1271_SCAN_STATE_2GHZ_ACTIVE:
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band = NL80211_BAND_2GHZ;
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mask = wlvif->bitrate_masks[band];
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if (wl->scan.req->no_cck) {
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mask &= ~CONF_TX_CCK_RATES;
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if (!mask)
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mask = CONF_TX_RATE_MASK_BASIC_P2P;
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}
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rate = wl1271_tx_min_rate_get(wl, mask);
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ret = wl1271_scan_send(wl, wlvif, band, false, rate);
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if (ret == WL1271_NOTHING_TO_SCAN) {
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wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE;
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wl1271_scan_stm(wl, wlvif);
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}
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break;
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case WL1271_SCAN_STATE_2GHZ_PASSIVE:
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band = NL80211_BAND_2GHZ;
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mask = wlvif->bitrate_masks[band];
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if (wl->scan.req->no_cck) {
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mask &= ~CONF_TX_CCK_RATES;
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if (!mask)
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mask = CONF_TX_RATE_MASK_BASIC_P2P;
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}
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rate = wl1271_tx_min_rate_get(wl, mask);
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ret = wl1271_scan_send(wl, wlvif, band, true, rate);
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if (ret == WL1271_NOTHING_TO_SCAN) {
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if (wl->enable_11a)
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wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE;
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else
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wl->scan.state = WL1271_SCAN_STATE_DONE;
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wl1271_scan_stm(wl, wlvif);
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}
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break;
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case WL1271_SCAN_STATE_5GHZ_ACTIVE:
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band = NL80211_BAND_5GHZ;
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rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
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ret = wl1271_scan_send(wl, wlvif, band, false, rate);
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if (ret == WL1271_NOTHING_TO_SCAN) {
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wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE;
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wl1271_scan_stm(wl, wlvif);
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}
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break;
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case WL1271_SCAN_STATE_5GHZ_PASSIVE:
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band = NL80211_BAND_5GHZ;
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rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
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ret = wl1271_scan_send(wl, wlvif, band, true, rate);
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if (ret == WL1271_NOTHING_TO_SCAN) {
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wl->scan.state = WL1271_SCAN_STATE_DONE;
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wl1271_scan_stm(wl, wlvif);
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}
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break;
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case WL1271_SCAN_STATE_DONE:
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wl->scan.failed = false;
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cancel_delayed_work(&wl->scan_complete_work);
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ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
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msecs_to_jiffies(0));
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break;
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default:
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wl1271_error("invalid scan state");
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break;
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}
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if (ret < 0) {
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cancel_delayed_work(&wl->scan_complete_work);
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ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
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msecs_to_jiffies(0));
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}
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}
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static void wl12xx_adjust_channels(struct wl1271_cmd_sched_scan_config *cmd,
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struct wlcore_scan_channels *cmd_channels)
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{
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memcpy(cmd->passive, cmd_channels->passive, sizeof(cmd->passive));
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memcpy(cmd->active, cmd_channels->active, sizeof(cmd->active));
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cmd->dfs = cmd_channels->dfs;
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cmd->n_pactive_ch = cmd_channels->passive_active;
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memcpy(cmd->channels_2, cmd_channels->channels_2,
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sizeof(cmd->channels_2));
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memcpy(cmd->channels_5, cmd_channels->channels_5,
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sizeof(cmd->channels_5));
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/* channels_4 are not supported, so no need to copy them */
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}
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int wl1271_scan_sched_scan_config(struct wl1271 *wl,
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struct wl12xx_vif *wlvif,
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struct cfg80211_sched_scan_request *req,
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struct ieee80211_scan_ies *ies)
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{
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struct wl1271_cmd_sched_scan_config *cfg = NULL;
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struct wlcore_scan_channels *cfg_channels = NULL;
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struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
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int i, ret;
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bool force_passive = !req->n_ssids;
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wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
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cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
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if (!cfg)
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return -ENOMEM;
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cfg->role_id = wlvif->role_id;
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cfg->rssi_threshold = c->rssi_threshold;
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cfg->snr_threshold = c->snr_threshold;
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cfg->n_probe_reqs = c->num_probe_reqs;
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/* cycles set to 0 it means infinite (until manually stopped) */
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cfg->cycles = 0;
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/* report APs when at least 1 is found */
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cfg->report_after = 1;
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/* don't stop scanning automatically when something is found */
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cfg->terminate = 0;
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cfg->tag = WL1271_SCAN_DEFAULT_TAG;
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/* don't filter on BSS type */
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cfg->bss_type = SCAN_BSS_TYPE_ANY;
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/* currently NL80211 supports only a single interval */
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for (i = 0; i < SCAN_MAX_CYCLE_INTERVALS; i++)
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cfg->intervals[i] = cpu_to_le32(req->scan_plans[0].interval *
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MSEC_PER_SEC);
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cfg->ssid_len = 0;
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ret = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
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if (ret < 0)
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goto out;
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cfg->filter_type = ret;
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wl1271_debug(DEBUG_SCAN, "filter_type = %d", cfg->filter_type);
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cfg_channels = kzalloc(sizeof(*cfg_channels), GFP_KERNEL);
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if (!cfg_channels) {
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ret = -ENOMEM;
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goto out;
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}
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if (!wlcore_set_scan_chan_params(wl, cfg_channels, req->channels,
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req->n_channels, req->n_ssids,
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SCAN_TYPE_PERIODIC)) {
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wl1271_error("scan channel list is empty");
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ret = -EINVAL;
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goto out;
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}
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wl12xx_adjust_channels(cfg, cfg_channels);
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if (!force_passive && cfg->active[0]) {
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u8 band = NL80211_BAND_2GHZ;
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ret = wl12xx_cmd_build_probe_req(wl, wlvif,
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wlvif->role_id, band,
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req->ssids[0].ssid,
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req->ssids[0].ssid_len,
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ies->ies[band],
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ies->len[band],
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ies->common_ies,
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ies->common_ie_len,
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true);
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if (ret < 0) {
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wl1271_error("2.4GHz PROBE request template failed");
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goto out;
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}
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}
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if (!force_passive && cfg->active[1]) {
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u8 band = NL80211_BAND_5GHZ;
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ret = wl12xx_cmd_build_probe_req(wl, wlvif,
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wlvif->role_id, band,
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req->ssids[0].ssid,
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req->ssids[0].ssid_len,
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ies->ies[band],
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ies->len[band],
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ies->common_ies,
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ies->common_ie_len,
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true);
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if (ret < 0) {
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wl1271_error("5GHz PROBE request template failed");
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goto out;
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}
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}
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wl1271_dump(DEBUG_SCAN, "SCAN_CFG: ", cfg, sizeof(*cfg));
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ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_CFG, cfg,
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sizeof(*cfg), 0);
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if (ret < 0) {
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wl1271_error("SCAN configuration failed");
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goto out;
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}
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out:
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kfree(cfg_channels);
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kfree(cfg);
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return ret;
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}
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int wl1271_scan_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif)
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{
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struct wl1271_cmd_sched_scan_start *start;
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int ret = 0;
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wl1271_debug(DEBUG_CMD, "cmd periodic scan start");
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if (wlvif->bss_type != BSS_TYPE_STA_BSS)
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return -EOPNOTSUPP;
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if ((wl->quirks & WLCORE_QUIRK_NO_SCHED_SCAN_WHILE_CONN) &&
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test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
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return -EBUSY;
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start = kzalloc(sizeof(*start), GFP_KERNEL);
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if (!start)
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return -ENOMEM;
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start->role_id = wlvif->role_id;
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start->tag = WL1271_SCAN_DEFAULT_TAG;
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ret = wl1271_cmd_send(wl, CMD_START_PERIODIC_SCAN, start,
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sizeof(*start), 0);
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if (ret < 0) {
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wl1271_error("failed to send scan start command");
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goto out_free;
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}
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out_free:
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kfree(start);
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return ret;
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}
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int wl12xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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struct cfg80211_sched_scan_request *req,
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struct ieee80211_scan_ies *ies)
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{
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int ret;
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ret = wl1271_scan_sched_scan_config(wl, wlvif, req, ies);
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if (ret < 0)
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return ret;
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return wl1271_scan_sched_scan_start(wl, wlvif);
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}
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void wl12xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
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{
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struct wl1271_cmd_sched_scan_stop *stop;
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int ret = 0;
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wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
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/* FIXME: what to do if alloc'ing to stop fails? */
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stop = kzalloc(sizeof(*stop), GFP_KERNEL);
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if (!stop) {
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wl1271_error("failed to alloc memory to send sched scan stop");
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return;
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}
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stop->role_id = wlvif->role_id;
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stop->tag = WL1271_SCAN_DEFAULT_TAG;
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ret = wl1271_cmd_send(wl, CMD_STOP_PERIODIC_SCAN, stop,
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sizeof(*stop), 0);
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if (ret < 0) {
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wl1271_error("failed to send sched scan stop command");
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goto out_free;
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|
}
|
|
|
|
out_free:
|
|
kfree(stop);
|
|
}
|
|
|
|
int wl12xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
|
|
struct cfg80211_scan_request *req)
|
|
{
|
|
wl1271_scan_stm(wl, wlvif);
|
|
return 0;
|
|
}
|
|
|
|
void wl12xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif)
|
|
{
|
|
wl1271_scan_stm(wl, wlvif);
|
|
}
|