352 lines
8.7 KiB
C
352 lines
8.7 KiB
C
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/*
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* This file is part of wl18xx
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*
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* Copyright (C) 2012 Texas Instruments. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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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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static void wl18xx_adjust_channels(struct wl18xx_cmd_scan_params *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->passive_active = 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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static int wl18xx_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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struct cfg80211_scan_request *req)
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{
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struct wl18xx_cmd_scan_params *cmd;
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struct wlcore_scan_channels *cmd_channels = NULL;
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int ret;
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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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/* 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->role_id = wlvif->dev_role_id;
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else
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cmd->role_id = wlvif->role_id;
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if (WARN_ON(cmd->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->scan_type = SCAN_TYPE_SEARCH;
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cmd->rssi_threshold = -127;
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cmd->snr_threshold = 0;
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cmd->bss_type = SCAN_BSS_TYPE_ANY;
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cmd->ssid_from_list = 0;
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cmd->filter = 0;
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cmd->add_broadcast = 0;
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cmd->urgency = 0;
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cmd->protect = 0;
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cmd->n_probe_reqs = wl->conf.scan.num_probe_reqs;
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cmd->terminate_after = 0;
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/* configure channels */
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WARN_ON(req->n_ssids > 1);
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cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
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if (!cmd_channels) {
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ret = -ENOMEM;
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goto out;
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}
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wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
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req->n_channels, req->n_ssids,
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SCAN_TYPE_SEARCH);
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wl18xx_adjust_channels(cmd, cmd_channels);
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/*
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* all the cycles params (except total cycles) should
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* remain 0 for normal scan
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*/
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cmd->total_cycles = 1;
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if (req->no_cck)
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cmd->rate = WL18XX_SCAN_RATE_6;
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cmd->tag = WL1271_SCAN_DEFAULT_TAG;
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if (req->n_ssids) {
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cmd->ssid_len = req->ssids[0].ssid_len;
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memcpy(cmd->ssid, req->ssids[0].ssid, cmd->ssid_len);
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}
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/* TODO: per-band ies? */
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if (cmd->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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cmd->role_id, band,
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req->ssids ? req->ssids[0].ssid : NULL,
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req->ssids ? req->ssids[0].ssid_len : 0,
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req->ie,
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req->ie_len,
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NULL,
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0,
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false);
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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 (cmd->active[1] || cmd->dfs) {
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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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cmd->role_id, band,
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req->ssids ? req->ssids[0].ssid : NULL,
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req->ssids ? req->ssids[0].ssid_len : 0,
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req->ie,
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req->ie_len,
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NULL,
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0,
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false);
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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: ", 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_channels);
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kfree(cmd);
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return ret;
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}
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void wl18xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif)
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{
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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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}
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static
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int wl18xx_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 wl18xx_cmd_scan_params *cmd;
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struct wlcore_scan_channels *cmd_channels = NULL;
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struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
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int ret;
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int filter_type;
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wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
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filter_type = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
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if (filter_type < 0)
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return filter_type;
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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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cmd->role_id = wlvif->role_id;
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if (WARN_ON(cmd->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->scan_type = SCAN_TYPE_PERIODIC;
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cmd->rssi_threshold = c->rssi_threshold;
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cmd->snr_threshold = c->snr_threshold;
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/* don't filter on BSS type */
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cmd->bss_type = SCAN_BSS_TYPE_ANY;
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cmd->ssid_from_list = 1;
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if (filter_type == SCAN_SSID_FILTER_LIST)
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cmd->filter = 1;
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cmd->add_broadcast = 0;
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cmd->urgency = 0;
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cmd->protect = 0;
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cmd->n_probe_reqs = c->num_probe_reqs;
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/* don't stop scanning automatically when something is found */
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cmd->terminate_after = 0;
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cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
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if (!cmd_channels) {
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ret = -ENOMEM;
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goto out;
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}
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/* configure channels */
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wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
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req->n_channels, req->n_ssids,
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SCAN_TYPE_PERIODIC);
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wl18xx_adjust_channels(cmd, cmd_channels);
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if (c->num_short_intervals && c->long_interval &&
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c->long_interval > req->scan_plans[0].interval * MSEC_PER_SEC) {
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cmd->short_cycles_msec =
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cpu_to_le16(req->scan_plans[0].interval * MSEC_PER_SEC);
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cmd->long_cycles_msec = cpu_to_le16(c->long_interval);
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cmd->short_cycles_count = c->num_short_intervals;
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} else {
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cmd->short_cycles_msec = 0;
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cmd->long_cycles_msec =
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cpu_to_le16(req->scan_plans[0].interval * MSEC_PER_SEC);
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cmd->short_cycles_count = 0;
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}
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wl1271_debug(DEBUG_SCAN, "short_interval: %d, long_interval: %d, num_short: %d",
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le16_to_cpu(cmd->short_cycles_msec),
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le16_to_cpu(cmd->long_cycles_msec),
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cmd->short_cycles_count);
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cmd->total_cycles = 0;
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cmd->tag = WL1271_SCAN_DEFAULT_TAG;
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/* create a PERIODIC_SCAN_REPORT_EVENT whenever we've got a match */
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cmd->report_threshold = 1;
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cmd->terminate_on_report = 0;
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if (cmd->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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cmd->role_id, band,
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req->ssids ? req->ssids[0].ssid : NULL,
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req->ssids ? req->ssids[0].ssid_len : 0,
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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 (cmd->active[1] || cmd->dfs) {
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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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cmd->role_id, band,
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req->ssids ? req->ssids[0].ssid : NULL,
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req->ssids ? req->ssids[0].ssid_len : 0,
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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: ", 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_channels);
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kfree(cmd);
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return ret;
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}
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int wl18xx_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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return wl18xx_scan_sched_scan_config(wl, wlvif, req, ies);
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}
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static int __wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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u8 scan_type)
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{
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struct wl18xx_cmd_scan_stop *stop;
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int ret;
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wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
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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 -ENOMEM;
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}
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stop->role_id = wlvif->role_id;
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stop->scan_type = scan_type;
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ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, stop, 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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}
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out_free:
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kfree(stop);
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return ret;
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}
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void wl18xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
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{
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__wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_PERIODIC);
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}
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int wl18xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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struct cfg80211_scan_request *req)
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{
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return wl18xx_scan_send(wl, wlvif, req);
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}
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int wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
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{
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return __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_SEARCH);
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}
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