/*
* 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 "wlcore.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;
u32 min_dwell_time_active, max_dwell_time_active, delta_per_probe;
u32 dwell_time_passive, dwell_time_dfs;
if (band == IEEE80211_BAND_5GHZ)
delta_per_probe = c->dwell_time_delta_per_probe_5;
else
delta_per_probe = c->dwell_time_delta_per_probe;
min_dwell_time_active = c->base_dwell_time +
req->n_ssids * c->num_probe_reqs * delta_per_probe;
max_dwell_time_active = min_dwell_time_active + c->max_dwell_time_delta;
min_dwell_time_active = DIV_ROUND_UP(min_dwell_time_active, 1000);
max_dwell_time_active = DIV_ROUND_UP(max_dwell_time_active, 1000);
dwell_time_passive = DIV_ROUND_UP(c->dwell_time_passive, 1000);
dwell_time_dfs = DIV_ROUND_UP(c->dwell_time_dfs, 1000);
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);
wl1271_debug(DEBUG_SCAN, "min_dwell_time %d max dwell time %d",
min_dwell_time_active,
max_dwell_time_active);
if (flags & IEEE80211_CHAN_RADAR) {
channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS;
channels[j].passive_duration =
cpu_to_le16(dwell_time_dfs);
} else {
channels[j].passive_duration =
cpu_to_le16(dwell_time_passive);
}
channels[j].min_duration =
cpu_to_le16(min_dwell_time_active);
channels[j].max_duration =
cpu_to_le16(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 wl12xx_vif *wlvif,
struct cfg80211_sched_scan_request *req)
{
struct wl1271_cmd_sched_scan_ssid_list *cmd = NULL;
struct cfg80211_match_set *sets = req->match_sets;
struct cfg80211_ssid *ssids = req->ssids;
int ret = 0, type, i, j, n_match_ssids = 0;
wl1271_debug(DEBUG_CMD, "cmd sched scan ssid list");
/* count the match sets that contain SSIDs */
for (i = 0; i < req->n_match_sets; i++)
if (sets[i].ssid.ssid_len > 0)
n_match_ssids++;
/* No filter, no ssids or only bcast ssid */
if (!n_match_ssids &&
(!req->n_ssids ||
(req->n_ssids == 1 && req->ssids[0].ssid_len == 0))) {
type = SCAN_SSID_FILTER_ANY;
goto out;
}
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd) {
ret = -ENOMEM;
goto out;
}
cmd->role_id = wlvif->dev_role_id;
if (!n_match_ssids) {
/* No filter, with ssids */
type = SCAN_SSID_FILTER_DISABLED;
for (i = 0; i < req->n_ssids; i++) {
cmd->ssids[cmd->n_ssids].type = (ssids[i].ssid_len) ?
SCAN_SSID_TYPE_HIDDEN : SCAN_SSID_TYPE_PUBLIC;
cmd->ssids[cmd->n_ssids].len = ssids[i].ssid_len;
memcpy(cmd->ssids[cmd->n_ssids].ssid, ssids[i].ssid,
ssids[i].ssid_len);
cmd->n_ssids++;
}
} else {
type = SCAN_SSID_FILTER_LIST;
/* Add all SSIDs from the filters */
for (i = 0; i < req->n_match_sets; i++) {
/* ignore sets without SSIDs */
if (!sets[i].ssid.ssid_len)
continue;
cmd->ssids[cmd->n_ssids].type = SCAN_SSID_TYPE_PUBLIC;
cmd->ssids[cmd->n_ssids].len = sets[i].ssid.ssid_len;
memcpy(cmd->ssids[cmd->n_ssids].ssid,
sets[i].ssid.ssid, sets[i].ssid.ssid_len);
cmd->n_ssids++;
}
if ((req->n_ssids > 1) ||
(req->n_ssids == 1 && req->ssids[0].ssid_len > 0)) {
/*
* Mark all the SSIDs passed in the SSID list as HIDDEN,
* so they're used in probe requests.
*/
for (i = 0; i < req->n_ssids; i++) {
if (!req->ssids[i].ssid_len)
continue;
for (j = 0; j < cmd->n_ssids; j++)
if (!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->role_id = wlvif->dev_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 = wl12xx_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);
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->role_id = wlvif->dev_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;
}
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 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->dev_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);
}
