diff options
Diffstat (limited to 'drivers/net/wireless/wl12xx/scan.c')
| -rw-r--r-- | drivers/net/wireless/wl12xx/scan.c | 770 |
1 files changed, 770 insertions, 0 deletions
diff --git a/drivers/net/wireless/wl12xx/scan.c b/drivers/net/wireless/wl12xx/scan.c new file mode 100644 index 00000000..fcba055e --- /dev/null +++ b/drivers/net/wireless/wl12xx/scan.c @@ -0,0 +1,770 @@ +/* + * This file is part of wl1271 + * + * Copyright (C) 2009-2010 Nokia Corporation + * + * Contact: Luciano Coelho <luciano.coelho@nokia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include <linux/ieee80211.h> + +#include "wl12xx.h" +#include "debug.h" +#include "cmd.h" +#include "scan.h" +#include "acx.h" +#include "ps.h" +#include "tx.h" + +void wl1271_scan_complete_work(struct work_struct *work) +{ + struct delayed_work *dwork; + struct wl1271 *wl; + struct ieee80211_vif *vif; + struct wl12xx_vif *wlvif; + int ret; + + dwork = container_of(work, struct delayed_work, work); + wl = container_of(dwork, struct wl1271, scan_complete_work); + + wl1271_debug(DEBUG_SCAN, "Scanning complete"); + + mutex_lock(&wl->mutex); + + if (wl->state == WL1271_STATE_OFF) + goto out; + + if (wl->scan.state == WL1271_SCAN_STATE_IDLE) + goto out; + + vif = wl->scan_vif; + wlvif = wl12xx_vif_to_data(vif); + + /* + * Rearm the tx watchdog just before idling scan. This + * prevents just-finished scans from triggering the watchdog + */ + wl12xx_rearm_tx_watchdog_locked(wl); + + wl->scan.state = WL1271_SCAN_STATE_IDLE; + memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch)); + wl->scan.req = NULL; + wl->scan_vif = NULL; + + ret = wl1271_ps_elp_wakeup(wl); + if (ret < 0) + goto out; + + if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) { + /* restore hardware connection monitoring template */ + wl1271_cmd_build_ap_probe_req(wl, wlvif, wlvif->probereq); + } + + wl1271_ps_elp_sleep(wl); + + if (wl->scan.failed) { + wl1271_info("Scan completed due to error."); + wl12xx_queue_recovery_work(wl); + } + + ieee80211_scan_completed(wl->hw, false); + +out: + mutex_unlock(&wl->mutex); + +} + + +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_PASSIVE_SCAN))) { + 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->min_dwell_time_passive); + channels[j].max_duration = + cpu_to_le32(c->max_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 ieee80211_vif *vif, + enum ieee80211_band band, + bool passive, u32 basic_rate) +{ + struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); + 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; + + if (wlvif->bss_type == BSS_TYPE_AP_BSS || + test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) + cmd->params.role_id = wlvif->role_id; + else + cmd->params.role_id = wlvif->dev_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); + 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; +} + +void wl1271_scan_stm(struct wl1271 *wl, struct ieee80211_vif *vif) +{ + struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); + 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, vif, band, false, rate); + if (ret == WL1271_NOTHING_TO_SCAN) { + wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE; + wl1271_scan_stm(wl, vif); + } + + 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, vif, 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, vif); + } + + 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, vif, band, false, rate); + if (ret == WL1271_NOTHING_TO_SCAN) { + wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE; + wl1271_scan_stm(wl, vif); + } + + 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, vif, band, true, rate); + if (ret == WL1271_NOTHING_TO_SCAN) { + wl->scan.state = WL1271_SCAN_STATE_DONE; + wl1271_scan_stm(wl, vif); + } + + 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)); + } +} + +int wl1271_scan(struct wl1271 *wl, struct ieee80211_vif *vif, + const u8 *ssid, size_t ssid_len, + struct cfg80211_scan_request *req) +{ + /* + * cfg80211 should guarantee that we don't get more channels + * than what we have registered. + */ + BUG_ON(req->n_channels > WL1271_MAX_CHANNELS); + + if (wl->scan.state != WL1271_SCAN_STATE_IDLE) + return -EBUSY; + + wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE; + + if (ssid_len && ssid) { + wl->scan.ssid_len = ssid_len; + memcpy(wl->scan.ssid, ssid, ssid_len); + } else { + wl->scan.ssid_len = 0; + } + + wl->scan_vif = vif; + wl->scan.req = req; + memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch)); + + /* we assume failure so that timeout scenarios are handled correctly */ + wl->scan.failed = true; + ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work, + msecs_to_jiffies(WL1271_SCAN_TIMEOUT)); + + wl1271_scan_stm(wl, vif); + + return 0; +} + +int wl1271_scan_stop(struct wl1271 *wl) +{ + 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; +} + +static int +wl1271_scan_get_sched_scan_channels(struct wl1271 *wl, + struct cfg80211_sched_scan_request *req, + struct conn_scan_ch_params *channels, + u32 band, bool radar, bool passive, + int start, int max_channels) +{ + struct conf_sched_scan_settings *c = &wl->conf.sched_scan; + int i, j; + u32 flags; + bool force_passive = !req->n_ssids; + + for (i = 0, j = start; + i < req->n_channels && j < max_channels; + i++) { + flags = req->channels[i]->flags; + + if (force_passive) + flags |= IEEE80211_CHAN_PASSIVE_SCAN; + + if ((req->channels[i]->band == band) && + !(flags & IEEE80211_CHAN_DISABLED) && + (!!(flags & IEEE80211_CHAN_RADAR) == radar) && + /* if radar is set, we ignore the passive flag */ + (radar || + !!(flags & IEEE80211_CHAN_PASSIVE_SCAN) == passive)) { + 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_power %d", + req->channels[i]->max_power); + + if (flags & IEEE80211_CHAN_RADAR) { + channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS; + + channels[j].passive_duration = + cpu_to_le16(c->dwell_time_dfs); + } else { + channels[j].passive_duration = + cpu_to_le16(c->dwell_time_passive); + } + + channels[j].min_duration = + cpu_to_le16(c->min_dwell_time_active); + channels[j].max_duration = + cpu_to_le16(c->max_dwell_time_active); + + channels[j].tx_power_att = req->channels[i]->max_power; + channels[j].channel = req->channels[i]->hw_value; + + j++; + } + } + + return j - start; +} + +static bool +wl1271_scan_sched_scan_channels(struct wl1271 *wl, + struct cfg80211_sched_scan_request *req, + struct wl1271_cmd_sched_scan_config *cfg) +{ + cfg->passive[0] = + wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_2, + IEEE80211_BAND_2GHZ, + false, true, 0, + MAX_CHANNELS_2GHZ); + cfg->active[0] = + wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_2, + IEEE80211_BAND_2GHZ, + false, false, + cfg->passive[0], + MAX_CHANNELS_2GHZ); + cfg->passive[1] = + wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_5, + IEEE80211_BAND_5GHZ, + false, true, 0, + MAX_CHANNELS_5GHZ); + cfg->dfs = + wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_5, + IEEE80211_BAND_5GHZ, + true, true, + cfg->passive[1], + MAX_CHANNELS_5GHZ); + cfg->active[1] = + wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_5, + IEEE80211_BAND_5GHZ, + false, false, + cfg->passive[1] + cfg->dfs, + MAX_CHANNELS_5GHZ); + /* 802.11j channels are not supported yet */ + cfg->passive[2] = 0; + cfg->active[2] = 0; + + wl1271_debug(DEBUG_SCAN, " 2.4GHz: active %d passive %d", + cfg->active[0], cfg->passive[0]); + wl1271_debug(DEBUG_SCAN, " 5GHz: active %d passive %d", + cfg->active[1], cfg->passive[1]); + wl1271_debug(DEBUG_SCAN, " DFS: %d", cfg->dfs); + + return cfg->passive[0] || cfg->active[0] || + cfg->passive[1] || cfg->active[1] || cfg->dfs || + cfg->passive[2] || cfg->active[2]; +} + +/* Returns the scan type to be used or a negative value on error */ +static int +wl12xx_scan_sched_scan_ssid_list(struct wl1271 *wl, + 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, "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; + } + + 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 (!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; + } + } + } + } + + wl1271_dump(DEBUG_SCAN, "SSID_LIST: ", cmd, sizeof(*cmd)); + + 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; +} + +int wl1271_scan_sched_scan_config(struct wl1271 *wl, + struct wl12xx_vif *wlvif, + struct cfg80211_sched_scan_request *req, + struct ieee80211_sched_scan_ies *ies) +{ + struct wl1271_cmd_sched_scan_config *cfg = 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->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 = wl12xx_scan_sched_scan_ssid_list(wl, req); + if (ret < 0) + goto out; + + cfg->filter_type = ret; + + wl1271_debug(DEBUG_SCAN, "filter_type = %d", cfg->filter_type); + + if (!wl1271_scan_sched_scan_channels(wl, req, cfg)) { + wl1271_error("scan channel list is empty"); + ret = -EINVAL; + goto out; + } + + if (!force_passive && cfg->active[0]) { + u8 band = IEEE80211_BAND_2GHZ; + ret = wl12xx_cmd_build_probe_req(wl, wlvif, + wlvif->dev_role_id, band, + req->ssids[0].ssid, + req->ssids[0].ssid_len, + ies->ie[band], + ies->len[band]); + 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->dev_role_id, band, + req->ssids[0].ssid, + req->ssids[0].ssid_len, + ies->ie[band], + ies->len[band]); + 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); + 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 (test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags)) + return -EBUSY; + + start = kzalloc(sizeof(*start), GFP_KERNEL); + if (!start) + return -ENOMEM; + + 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; +} + +void wl1271_scan_sched_scan_results(struct wl1271 *wl) +{ + wl1271_debug(DEBUG_SCAN, "got periodic scan results"); + + ieee80211_sched_scan_results(wl->hw); +} + +void wl1271_scan_sched_scan_stop(struct wl1271 *wl) +{ + 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->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); +} |