| /* |
| * This file is part of wl12xx |
| * |
| * Copyright (C) 2012 Texas Instruments. All rights reserved. |
| * |
| * 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 "scan.h" |
| #include "../wlcore/debug.h" |
| #include "../wlcore/tx.h" |
| |
| static int wl1271_get_scan_channels(struct wl1271 *wl, |
| struct cfg80211_scan_request *req, |
| struct basic_scan_channel_params *channels, |
| enum ieee80211_band band, bool passive) |
| { |
| struct conf_scan_settings *c = &wl->conf.scan; |
| int i, j; |
| u32 flags; |
| |
| for (i = 0, j = 0; |
| i < req->n_channels && j < WL1271_SCAN_MAX_CHANNELS; |
| i++) { |
| flags = req->channels[i]->flags; |
| |
| if (!test_bit(i, wl->scan.scanned_ch) && |
| !(flags & IEEE80211_CHAN_DISABLED) && |
| (req->channels[i]->band == band) && |
| /* |
| * In passive scans, we scan all remaining |
| * channels, even if not marked as such. |
| * In active scans, we only scan channels not |
| * marked as passive. |
| */ |
| (passive || !(flags & IEEE80211_CHAN_NO_IR))) { |
| wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ", |
| req->channels[i]->band, |
| req->channels[i]->center_freq); |
| wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X", |
| req->channels[i]->hw_value, |
| req->channels[i]->flags); |
| wl1271_debug(DEBUG_SCAN, |
| "max_antenna_gain %d, max_power %d", |
| req->channels[i]->max_antenna_gain, |
| req->channels[i]->max_power); |
| wl1271_debug(DEBUG_SCAN, "beacon_found %d", |
| req->channels[i]->beacon_found); |
| |
| if (!passive) { |
| channels[j].min_duration = |
| cpu_to_le32(c->min_dwell_time_active); |
| channels[j].max_duration = |
| cpu_to_le32(c->max_dwell_time_active); |
| } else { |
| channels[j].min_duration = |
| cpu_to_le32(c->dwell_time_passive); |
| channels[j].max_duration = |
| cpu_to_le32(c->dwell_time_passive); |
| } |
| channels[j].early_termination = 0; |
| channels[j].tx_power_att = req->channels[i]->max_power; |
| channels[j].channel = req->channels[i]->hw_value; |
| |
| memset(&channels[j].bssid_lsb, 0xff, 4); |
| memset(&channels[j].bssid_msb, 0xff, 2); |
| |
| /* Mark the channels we already used */ |
| set_bit(i, wl->scan.scanned_ch); |
| |
| j++; |
| } |
| } |
| |
| return j; |
| } |
| |
| #define WL1271_NOTHING_TO_SCAN 1 |
| |
| static int wl1271_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
| enum ieee80211_band band, |
| bool passive, u32 basic_rate) |
| { |
| struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif); |
| struct wl1271_cmd_scan *cmd; |
| struct wl1271_cmd_trigger_scan_to *trigger; |
| int ret; |
| u16 scan_options = 0; |
| |
| /* skip active scans if we don't have SSIDs */ |
| if (!passive && wl->scan.req->n_ssids == 0) |
| return WL1271_NOTHING_TO_SCAN; |
| |
| cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); |
| trigger = kzalloc(sizeof(*trigger), GFP_KERNEL); |
| if (!cmd || !trigger) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| if (wl->conf.scan.split_scan_timeout) |
| scan_options |= WL1271_SCAN_OPT_SPLIT_SCAN; |
| |
| if (passive) |
| scan_options |= WL1271_SCAN_OPT_PASSIVE; |
| |
| /* scan on the dev role if the regular one is not started */ |
| if (wlcore_is_p2p_mgmt(wlvif)) |
| cmd->params.role_id = wlvif->dev_role_id; |
| else |
| cmd->params.role_id = wlvif->role_id; |
| |
| if (WARN_ON(cmd->params.role_id == WL12XX_INVALID_ROLE_ID)) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| cmd->params.scan_options = cpu_to_le16(scan_options); |
| |
| cmd->params.n_ch = wl1271_get_scan_channels(wl, wl->scan.req, |
| cmd->channels, |
| band, passive); |
| if (cmd->params.n_ch == 0) { |
| ret = WL1271_NOTHING_TO_SCAN; |
| goto out; |
| } |
| |
| cmd->params.tx_rate = cpu_to_le32(basic_rate); |
| cmd->params.n_probe_reqs = wl->conf.scan.num_probe_reqs; |
| cmd->params.tid_trigger = CONF_TX_AC_ANY_TID; |
| cmd->params.scan_tag = WL1271_SCAN_DEFAULT_TAG; |
| |
| if (band == IEEE80211_BAND_2GHZ) |
| cmd->params.band = WL1271_SCAN_BAND_2_4_GHZ; |
| else |
| cmd->params.band = WL1271_SCAN_BAND_5_GHZ; |
| |
| if (wl->scan.ssid_len && wl->scan.ssid) { |
| cmd->params.ssid_len = wl->scan.ssid_len; |
| memcpy(cmd->params.ssid, wl->scan.ssid, wl->scan.ssid_len); |
| } |
| |
| memcpy(cmd->addr, vif->addr, ETH_ALEN); |
| |
| ret = wl12xx_cmd_build_probe_req(wl, wlvif, |
| cmd->params.role_id, band, |
| wl->scan.ssid, wl->scan.ssid_len, |
| wl->scan.req->ie, |
| wl->scan.req->ie_len, NULL, 0, false); |
| if (ret < 0) { |
| wl1271_error("PROBE request template failed"); |
| goto out; |
| } |
| |
| trigger->timeout = cpu_to_le32(wl->conf.scan.split_scan_timeout); |
| ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger, |
| sizeof(*trigger), 0); |
| if (ret < 0) { |
| wl1271_error("trigger scan to failed for hw scan"); |
| goto out; |
| } |
| |
| wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd)); |
| |
| ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0); |
| if (ret < 0) { |
| wl1271_error("SCAN failed"); |
| goto out; |
| } |
| |
| out: |
| kfree(cmd); |
| kfree(trigger); |
| return ret; |
| } |
| |
| int wl12xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif) |
| { |
| struct wl1271_cmd_header *cmd = NULL; |
| int ret = 0; |
| |
| if (WARN_ON(wl->scan.state == WL1271_SCAN_STATE_IDLE)) |
| return -EINVAL; |
| |
| wl1271_debug(DEBUG_CMD, "cmd scan stop"); |
| |
| cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); |
| if (!cmd) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, cmd, |
| sizeof(*cmd), 0); |
| if (ret < 0) { |
| wl1271_error("cmd stop_scan failed"); |
| goto out; |
| } |
| out: |
| kfree(cmd); |
| return ret; |
| } |
| |
| void wl1271_scan_stm(struct wl1271 *wl, struct wl12xx_vif *wlvif) |
| { |
| int ret = 0; |
| enum ieee80211_band band; |
| u32 rate, mask; |
| |
| switch (wl->scan.state) { |
| case WL1271_SCAN_STATE_IDLE: |
| break; |
| |
| case WL1271_SCAN_STATE_2GHZ_ACTIVE: |
| band = IEEE80211_BAND_2GHZ; |
| mask = wlvif->bitrate_masks[band]; |
| if (wl->scan.req->no_cck) { |
| mask &= ~CONF_TX_CCK_RATES; |
| if (!mask) |
| mask = CONF_TX_RATE_MASK_BASIC_P2P; |
| } |
| rate = wl1271_tx_min_rate_get(wl, mask); |
| ret = wl1271_scan_send(wl, wlvif, band, false, rate); |
| if (ret == WL1271_NOTHING_TO_SCAN) { |
| wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE; |
| wl1271_scan_stm(wl, wlvif); |
| } |
| |
| break; |
| |
| case WL1271_SCAN_STATE_2GHZ_PASSIVE: |
| band = IEEE80211_BAND_2GHZ; |
| mask = wlvif->bitrate_masks[band]; |
| if (wl->scan.req->no_cck) { |
| mask &= ~CONF_TX_CCK_RATES; |
| if (!mask) |
| mask = CONF_TX_RATE_MASK_BASIC_P2P; |
| } |
| rate = wl1271_tx_min_rate_get(wl, mask); |
| ret = wl1271_scan_send(wl, wlvif, band, true, rate); |
| if (ret == WL1271_NOTHING_TO_SCAN) { |
| if (wl->enable_11a) |
| wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE; |
| else |
| wl->scan.state = WL1271_SCAN_STATE_DONE; |
| wl1271_scan_stm(wl, wlvif); |
| } |
| |
| break; |
| |
| case WL1271_SCAN_STATE_5GHZ_ACTIVE: |
| band = IEEE80211_BAND_5GHZ; |
| rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]); |
| ret = wl1271_scan_send(wl, wlvif, band, false, rate); |
| if (ret == WL1271_NOTHING_TO_SCAN) { |
| wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE; |
| wl1271_scan_stm(wl, wlvif); |
| } |
| |
| break; |
| |
| case WL1271_SCAN_STATE_5GHZ_PASSIVE: |
| band = IEEE80211_BAND_5GHZ; |
| rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]); |
| ret = wl1271_scan_send(wl, wlvif, band, true, rate); |
| if (ret == WL1271_NOTHING_TO_SCAN) { |
| wl->scan.state = WL1271_SCAN_STATE_DONE; |
| wl1271_scan_stm(wl, wlvif); |
| } |
| |
| break; |
| |
| case WL1271_SCAN_STATE_DONE: |
| wl->scan.failed = false; |
| cancel_delayed_work(&wl->scan_complete_work); |
| ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work, |
| msecs_to_jiffies(0)); |
| break; |
| |
| default: |
| wl1271_error("invalid scan state"); |
| break; |
| } |
| |
| if (ret < 0) { |
| cancel_delayed_work(&wl->scan_complete_work); |
| ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work, |
| msecs_to_jiffies(0)); |
| } |
| } |
| |
| static void wl12xx_adjust_channels(struct wl1271_cmd_sched_scan_config *cmd, |
| struct wlcore_scan_channels *cmd_channels) |
| { |
| memcpy(cmd->passive, cmd_channels->passive, sizeof(cmd->passive)); |
| memcpy(cmd->active, cmd_channels->active, sizeof(cmd->active)); |
| cmd->dfs = cmd_channels->dfs; |
| cmd->n_pactive_ch = cmd_channels->passive_active; |
| |
| memcpy(cmd->channels_2, cmd_channels->channels_2, |
| sizeof(cmd->channels_2)); |
| memcpy(cmd->channels_5, cmd_channels->channels_5, |
| sizeof(cmd->channels_5)); |
| /* channels_4 are not supported, so no need to copy them */ |
| } |
| |
| int wl1271_scan_sched_scan_config(struct wl1271 *wl, |
| struct wl12xx_vif *wlvif, |
| struct cfg80211_sched_scan_request *req, |
| struct ieee80211_scan_ies *ies) |
| { |
| struct wl1271_cmd_sched_scan_config *cfg = NULL; |
| struct wlcore_scan_channels *cfg_channels = NULL; |
| struct conf_sched_scan_settings *c = &wl->conf.sched_scan; |
| int i, ret; |
| bool force_passive = !req->n_ssids; |
| |
| wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config"); |
| |
| cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); |
| if (!cfg) |
| return -ENOMEM; |
| |
| cfg->role_id = wlvif->role_id; |
| cfg->rssi_threshold = c->rssi_threshold; |
| cfg->snr_threshold = c->snr_threshold; |
| cfg->n_probe_reqs = c->num_probe_reqs; |
| /* cycles set to 0 it means infinite (until manually stopped) */ |
| cfg->cycles = 0; |
| /* report APs when at least 1 is found */ |
| cfg->report_after = 1; |
| /* don't stop scanning automatically when something is found */ |
| cfg->terminate = 0; |
| cfg->tag = WL1271_SCAN_DEFAULT_TAG; |
| /* don't filter on BSS type */ |
| cfg->bss_type = SCAN_BSS_TYPE_ANY; |
| /* currently NL80211 supports only a single interval */ |
| for (i = 0; i < SCAN_MAX_CYCLE_INTERVALS; i++) |
| cfg->intervals[i] = cpu_to_le32(req->interval); |
| |
| cfg->ssid_len = 0; |
| ret = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req); |
| if (ret < 0) |
| goto out; |
| |
| cfg->filter_type = ret; |
| |
| wl1271_debug(DEBUG_SCAN, "filter_type = %d", cfg->filter_type); |
| |
| cfg_channels = kzalloc(sizeof(*cfg_channels), GFP_KERNEL); |
| if (!cfg_channels) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| if (!wlcore_set_scan_chan_params(wl, cfg_channels, req->channels, |
| req->n_channels, req->n_ssids, |
| SCAN_TYPE_PERIODIC)) { |
| wl1271_error("scan channel list is empty"); |
| ret = -EINVAL; |
| goto out; |
| } |
| wl12xx_adjust_channels(cfg, cfg_channels); |
| |
| if (!force_passive && cfg->active[0]) { |
| u8 band = IEEE80211_BAND_2GHZ; |
| ret = wl12xx_cmd_build_probe_req(wl, wlvif, |
| wlvif->role_id, band, |
| req->ssids[0].ssid, |
| req->ssids[0].ssid_len, |
| ies->ies[band], |
| ies->len[band], |
| ies->common_ies, |
| ies->common_ie_len, |
| true); |
| if (ret < 0) { |
| wl1271_error("2.4GHz PROBE request template failed"); |
| goto out; |
| } |
| } |
| |
| if (!force_passive && cfg->active[1]) { |
| u8 band = IEEE80211_BAND_5GHZ; |
| ret = wl12xx_cmd_build_probe_req(wl, wlvif, |
| wlvif->role_id, band, |
| req->ssids[0].ssid, |
| req->ssids[0].ssid_len, |
| ies->ies[band], |
| ies->len[band], |
| ies->common_ies, |
| ies->common_ie_len, |
| true); |
| if (ret < 0) { |
| wl1271_error("5GHz PROBE request template failed"); |
| goto out; |
| } |
| } |
| |
| wl1271_dump(DEBUG_SCAN, "SCAN_CFG: ", cfg, sizeof(*cfg)); |
| |
| ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_CFG, cfg, |
| sizeof(*cfg), 0); |
| if (ret < 0) { |
| wl1271_error("SCAN configuration failed"); |
| goto out; |
| } |
| out: |
| kfree(cfg_channels); |
| kfree(cfg); |
| return ret; |
| } |
| |
| int wl1271_scan_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif) |
| { |
| struct wl1271_cmd_sched_scan_start *start; |
| int ret = 0; |
| |
| wl1271_debug(DEBUG_CMD, "cmd periodic scan start"); |
| |
| if (wlvif->bss_type != BSS_TYPE_STA_BSS) |
| return -EOPNOTSUPP; |
| |
| if ((wl->quirks & WLCORE_QUIRK_NO_SCHED_SCAN_WHILE_CONN) && |
| test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags)) |
| return -EBUSY; |
| |
| start = kzalloc(sizeof(*start), GFP_KERNEL); |
| if (!start) |
| return -ENOMEM; |
| |
| start->role_id = wlvif->role_id; |
| start->tag = WL1271_SCAN_DEFAULT_TAG; |
| |
| ret = wl1271_cmd_send(wl, CMD_START_PERIODIC_SCAN, start, |
| sizeof(*start), 0); |
| if (ret < 0) { |
| wl1271_error("failed to send scan start command"); |
| goto out_free; |
| } |
| |
| out_free: |
| kfree(start); |
| return ret; |
| } |
| |
| int wl12xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
| struct cfg80211_sched_scan_request *req, |
| struct ieee80211_scan_ies *ies) |
| { |
| int ret; |
| |
| ret = wl1271_scan_sched_scan_config(wl, wlvif, req, ies); |
| if (ret < 0) |
| return ret; |
| |
| return wl1271_scan_sched_scan_start(wl, wlvif); |
| } |
| |
| void wl12xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif) |
| { |
| struct wl1271_cmd_sched_scan_stop *stop; |
| int ret = 0; |
| |
| wl1271_debug(DEBUG_CMD, "cmd periodic scan stop"); |
| |
| /* FIXME: what to do if alloc'ing to stop fails? */ |
| stop = kzalloc(sizeof(*stop), GFP_KERNEL); |
| if (!stop) { |
| wl1271_error("failed to alloc memory to send sched scan stop"); |
| return; |
| } |
| |
| stop->role_id = wlvif->role_id; |
| stop->tag = WL1271_SCAN_DEFAULT_TAG; |
| |
| ret = wl1271_cmd_send(wl, CMD_STOP_PERIODIC_SCAN, stop, |
| sizeof(*stop), 0); |
| if (ret < 0) { |
| wl1271_error("failed to send sched scan stop command"); |
| goto out_free; |
| } |
| |
| 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); |
| } |