return -1;
}
-static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
- struct ieee80211_vif *vif,
- enum ieee80211_band band,
- struct iwl_scan_channel *scan_ch)
-{
- const struct ieee80211_supported_band *sband;
- u16 passive_dwell = 0;
- u16 active_dwell = 0;
- int added = 0;
- u16 channel = 0;
-
- sband = iwl_get_hw_mode(priv, band);
- if (!sband) {
- IWL_ERR(priv, "invalid band\n");
- return added;
- }
-
- active_dwell = iwl_get_active_dwell_time(priv, band, 0);
- passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
-
- if (passive_dwell <= active_dwell)
- passive_dwell = active_dwell + 1;
-
- channel = iwl_get_single_channel_number(priv, band);
- if (channel) {
- scan_ch->channel = cpu_to_le16(channel);
- scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
- scan_ch->active_dwell = cpu_to_le16(active_dwell);
- scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
- /* Set txpower levels to defaults */
- scan_ch->dsp_atten = 110;
- if (band == IEEE80211_BAND_5GHZ)
- scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
- else
- scan_ch->tx_gain = ((1 << 5) | (5 << 3));
- added++;
- } else
- IWL_ERR(priv, "no valid channel found\n");
- return added;
-}
-
-static int iwl_get_channels_for_scan(struct iwl_priv *priv,
- struct ieee80211_vif *vif,
- enum ieee80211_band band,
- u8 is_active, u8 n_probes,
- struct iwl_scan_channel *scan_ch)
-{
- struct ieee80211_channel *chan;
- const struct ieee80211_supported_band *sband;
- const struct iwl_channel_info *ch_info;
- u16 passive_dwell = 0;
- u16 active_dwell = 0;
- int added, i;
- u16 channel;
-
- sband = iwl_get_hw_mode(priv, band);
- if (!sband)
- return 0;
-
- active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
- passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
-
- if (passive_dwell <= active_dwell)
- passive_dwell = active_dwell + 1;
-
- for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
- chan = priv->scan_request->channels[i];
-
- if (chan->band != band)
- continue;
-
- channel = chan->hw_value;
- scan_ch->channel = cpu_to_le16(channel);
-
- ch_info = iwl_get_channel_info(priv, band, channel);
- if (!is_channel_valid(ch_info)) {
- IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
- channel);
- continue;
- }
-
- if (!is_active || is_channel_passive(ch_info) ||
- (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
- scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
- else
- scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
-
- if (n_probes)
- scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
-
- scan_ch->active_dwell = cpu_to_le16(active_dwell);
- scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
-
- /* Set txpower levels to defaults */
- scan_ch->dsp_atten = 110;
-
- /* NOTE: if we were doing 6Mb OFDM for scans we'd use
- * power level:
- * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
- */
- if (band == IEEE80211_BAND_5GHZ)
- scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
- else
- scan_ch->tx_gain = ((1 << 5) | (5 << 3));
-
- IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
- channel, le32_to_cpu(scan_ch->type),
- (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
- "ACTIVE" : "PASSIVE",
- (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
- active_dwell : passive_dwell);
-
- scan_ch++;
- added++;
- }
-
- IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
- return added;
-}
-
-int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
-{
- struct iwl_host_cmd cmd = {
- .id = REPLY_SCAN_CMD,
- .len = { sizeof(struct iwl_scan_cmd), },
- .flags = CMD_SYNC,
- };
- struct iwl_scan_cmd *scan;
- struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
- u32 rate_flags = 0;
- u16 cmd_len;
- u16 rx_chain = 0;
- enum ieee80211_band band;
- u8 n_probes = 0;
- u8 rx_ant = hw_params(priv).valid_rx_ant;
- u8 rate;
- bool is_active = false;
- int chan_mod;
- u8 active_chains;
- u8 scan_tx_antennas = hw_params(priv).valid_tx_ant;
- int ret;
-
- lockdep_assert_held(&priv->shrd->mutex);
-
- if (vif)
- ctx = iwl_rxon_ctx_from_vif(vif);
-
- if (!priv->scan_cmd) {
- priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
- IWL_MAX_SCAN_SIZE, GFP_KERNEL);
- if (!priv->scan_cmd) {
- IWL_DEBUG_SCAN(priv,
- "fail to allocate memory for scan\n");
- return -ENOMEM;
- }
- }
- scan = priv->scan_cmd;
- memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
-
- scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
- scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
-
- if (priv->scan_type != IWL_SCAN_ROC &&
- iwl_is_any_associated(priv)) {
- u16 interval = 0;
- u32 extra;
- u32 suspend_time = 100;
- u32 scan_suspend_time = 100;
-
- IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
- switch (priv->scan_type) {
- case IWL_SCAN_ROC:
- WARN_ON(1);
- break;
- case IWL_SCAN_RADIO_RESET:
- interval = 0;
- break;
- case IWL_SCAN_NORMAL:
- interval = vif->bss_conf.beacon_int;
- break;
- }
-
- scan->suspend_time = 0;
- scan->max_out_time = cpu_to_le32(200 * 1024);
- if (!interval)
- interval = suspend_time;
-
- extra = (suspend_time / interval) << 22;
- scan_suspend_time = (extra |
- ((suspend_time % interval) * 1024));
- scan->suspend_time = cpu_to_le32(scan_suspend_time);
- IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
- scan_suspend_time, interval);
- } else if (priv->scan_type == IWL_SCAN_ROC) {
- scan->suspend_time = 0;
- scan->max_out_time = 0;
- scan->quiet_time = 0;
- scan->quiet_plcp_th = 0;
- }
-
- switch (priv->scan_type) {
- case IWL_SCAN_RADIO_RESET:
- IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
- break;
- case IWL_SCAN_NORMAL:
- if (priv->scan_request->n_ssids) {
- int i, p = 0;
- IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
- for (i = 0; i < priv->scan_request->n_ssids; i++) {
- /* always does wildcard anyway */
- if (!priv->scan_request->ssids[i].ssid_len)
- continue;
- scan->direct_scan[p].id = WLAN_EID_SSID;
- scan->direct_scan[p].len =
- priv->scan_request->ssids[i].ssid_len;
- memcpy(scan->direct_scan[p].ssid,
- priv->scan_request->ssids[i].ssid,
- priv->scan_request->ssids[i].ssid_len);
- n_probes++;
- p++;
- }
- is_active = true;
- } else
- IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
- break;
- case IWL_SCAN_ROC:
- IWL_DEBUG_SCAN(priv, "Start ROC scan.\n");
- break;
- }
-
- scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
- scan->tx_cmd.sta_id = ctx->bcast_sta_id;
- scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
-
- switch (priv->scan_band) {
- case IEEE80211_BAND_2GHZ:
- scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
- chan_mod = le32_to_cpu(
- priv->contexts[IWL_RXON_CTX_BSS].active.flags &
- RXON_FLG_CHANNEL_MODE_MSK)
- >> RXON_FLG_CHANNEL_MODE_POS;
- if (chan_mod == CHANNEL_MODE_PURE_40) {
- rate = IWL_RATE_6M_PLCP;
- } else {
- rate = IWL_RATE_1M_PLCP;
- rate_flags = RATE_MCS_CCK_MSK;
- }
- /*
- * Internal scans are passive, so we can indiscriminately set
- * the BT ignore flag on 2.4 GHz since it applies to TX only.
- */
- if (priv->cfg->bt_params &&
- priv->cfg->bt_params->advanced_bt_coexist)
- scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
- break;
- case IEEE80211_BAND_5GHZ:
- rate = IWL_RATE_6M_PLCP;
- break;
- default:
- IWL_WARN(priv, "Invalid scan band\n");
- return -EIO;
- }
-
- /*
- * If active scanning is requested but a certain channel is
- * marked passive, we can do active scanning if we detect
- * transmissions.
- *
- * There is an issue with some firmware versions that triggers
- * a sysassert on a "good CRC threshold" of zero (== disabled),
- * on a radar channel even though this means that we should NOT
- * send probes.
- *
- * The "good CRC threshold" is the number of frames that we
- * need to receive during our dwell time on a channel before
- * sending out probes -- setting this to a huge value will
- * mean we never reach it, but at the same time work around
- * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
- * here instead of IWL_GOOD_CRC_TH_DISABLED.
- *
- * This was fixed in later versions along with some other
- * scan changes, and the threshold behaves as a flag in those
- * versions.
- */
- if (priv->new_scan_threshold_behaviour)
- scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
- IWL_GOOD_CRC_TH_DISABLED;
- else
- scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
- IWL_GOOD_CRC_TH_NEVER;
-
- band = priv->scan_band;
-
- if (priv->cfg->scan_rx_antennas[band])
- rx_ant = priv->cfg->scan_rx_antennas[band];
-
- if (band == IEEE80211_BAND_2GHZ &&
- priv->cfg->bt_params &&
- priv->cfg->bt_params->advanced_bt_coexist) {
- /* transmit 2.4 GHz probes only on first antenna */
- scan_tx_antennas = first_antenna(scan_tx_antennas);
- }
-
- priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band],
- scan_tx_antennas);
- rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
- scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
-
- /* In power save mode use one chain, otherwise use all chains */
- if (test_bit(STATUS_POWER_PMI, &priv->shrd->status)) {
- /* rx_ant has been set to all valid chains previously */
- active_chains = rx_ant &
- ((u8)(priv->chain_noise_data.active_chains));
- if (!active_chains)
- active_chains = rx_ant;
-
- IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
- priv->chain_noise_data.active_chains);
-
- rx_ant = first_antenna(active_chains);
- }
- if (priv->cfg->bt_params &&
- priv->cfg->bt_params->advanced_bt_coexist &&
- priv->bt_full_concurrent) {
- /* operated as 1x1 in full concurrency mode */
- rx_ant = first_antenna(rx_ant);
- }
-
- /* MIMO is not used here, but value is required */
- rx_chain |=
- hw_params(priv).valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
- rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
- rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
- rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
- scan->rx_chain = cpu_to_le16(rx_chain);
- switch (priv->scan_type) {
- case IWL_SCAN_NORMAL:
- cmd_len = iwl_fill_probe_req(priv,
- (struct ieee80211_mgmt *)scan->data,
- vif->addr,
- priv->scan_request->ie,
- priv->scan_request->ie_len,
- IWL_MAX_SCAN_SIZE - sizeof(*scan));
- break;
- case IWL_SCAN_RADIO_RESET:
- case IWL_SCAN_ROC:
- /* use bcast addr, will not be transmitted but must be valid */
- cmd_len = iwl_fill_probe_req(priv,
- (struct ieee80211_mgmt *)scan->data,
- iwl_bcast_addr, NULL, 0,
- IWL_MAX_SCAN_SIZE - sizeof(*scan));
- break;
- default:
- BUG();
- }
- scan->tx_cmd.len = cpu_to_le16(cmd_len);
-
- scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
- RXON_FILTER_BCON_AWARE_MSK);
-
- switch (priv->scan_type) {
- case IWL_SCAN_RADIO_RESET:
- scan->channel_count =
- iwl_get_single_channel_for_scan(priv, vif, band,
- (void *)&scan->data[cmd_len]);
- break;
- case IWL_SCAN_NORMAL:
- scan->channel_count =
- iwl_get_channels_for_scan(priv, vif, band,
- is_active, n_probes,
- (void *)&scan->data[cmd_len]);
- break;
- case IWL_SCAN_ROC: {
- struct iwl_scan_channel *scan_ch;
-
- scan->channel_count = 1;
-
- scan_ch = (void *)&scan->data[cmd_len];
- scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
- scan_ch->channel =
- cpu_to_le16(priv->hw_roc_channel->hw_value);
- scan_ch->active_dwell =
- scan_ch->passive_dwell =
- cpu_to_le16(priv->hw_roc_duration);
-
- /* Set txpower levels to defaults */
- scan_ch->dsp_atten = 110;
-
- /* NOTE: if we were doing 6Mb OFDM for scans we'd use
- * power level:
- * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
- */
- if (priv->hw_roc_channel->band == IEEE80211_BAND_5GHZ)
- scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
- else
- scan_ch->tx_gain = ((1 << 5) | (5 << 3));
- }
- break;
- }
-
- if (scan->channel_count == 0) {
- IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
- return -EIO;
- }
-
- cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) +
- scan->channel_count * sizeof(struct iwl_scan_channel);
- cmd.data[0] = scan;
- cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
- scan->len = cpu_to_le16(cmd.len[0]);
-
- /* set scan bit here for PAN params */
- set_bit(STATUS_SCAN_HW, &priv->shrd->status);
-
- ret = iwlagn_set_pan_params(priv);
- if (ret)
- return ret;
-
- ret = iwl_trans_send_cmd(trans(priv), &cmd);
- if (ret) {
- clear_bit(STATUS_SCAN_HW, &priv->shrd->status);
- iwlagn_set_pan_params(priv);
- }
-
- return ret;
-}
-
int iwlagn_manage_ibss_station(struct iwl_priv *priv,
struct ieee80211_vif *vif, bool add)
{
u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant_idx, u8 valid);
/* scan */
-int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif);
void iwlagn_post_scan(struct iwl_priv *priv);
void iwlagn_disable_roc(struct iwl_priv *priv);
u16 iwl_fill_probe_req(struct iwl_priv *priv, struct ieee80211_mgmt *frame,
const u8 *ta, const u8 *ie, int ie_len, int left);
void iwl_setup_rx_scan_handlers(struct iwl_priv *priv);
-u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
- enum ieee80211_band band,
- u8 n_probes);
-u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
- enum ieee80211_band band,
- struct ieee80211_vif *vif);
void iwl_setup_scan_deferred_work(struct iwl_priv *priv);
void iwl_cancel_scan_deferred_work(struct iwl_priv *priv);
int __must_check iwl_scan_initiate(struct iwl_priv *priv,
iwl_rx_scan_complete_notif;
}
-inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
- enum ieee80211_band band,
- u8 n_probes)
+static u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
+ enum ieee80211_band band, u8 n_probes)
{
if (band == IEEE80211_BAND_5GHZ)
return IWL_ACTIVE_DWELL_TIME_52 +
IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
}
-u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
- enum ieee80211_band band,
- struct ieee80211_vif *vif)
+static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
+ enum ieee80211_band band)
{
struct iwl_rxon_context *ctx;
u16 passive = (band == IEEE80211_BAND_2GHZ) ?
return passive;
}
+static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
+ struct ieee80211_vif *vif,
+ enum ieee80211_band band,
+ struct iwl_scan_channel *scan_ch)
+{
+ const struct ieee80211_supported_band *sband;
+ u16 passive_dwell = 0;
+ u16 active_dwell = 0;
+ int added = 0;
+ u16 channel = 0;
+
+ sband = iwl_get_hw_mode(priv, band);
+ if (!sband) {
+ IWL_ERR(priv, "invalid band\n");
+ return added;
+ }
+
+ active_dwell = iwl_get_active_dwell_time(priv, band, 0);
+ passive_dwell = iwl_get_passive_dwell_time(priv, band);
+
+ if (passive_dwell <= active_dwell)
+ passive_dwell = active_dwell + 1;
+
+ channel = iwl_get_single_channel_number(priv, band);
+ if (channel) {
+ scan_ch->channel = cpu_to_le16(channel);
+ scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
+ scan_ch->active_dwell = cpu_to_le16(active_dwell);
+ scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
+ /* Set txpower levels to defaults */
+ scan_ch->dsp_atten = 110;
+ if (band == IEEE80211_BAND_5GHZ)
+ scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
+ else
+ scan_ch->tx_gain = ((1 << 5) | (5 << 3));
+ added++;
+ } else
+ IWL_ERR(priv, "no valid channel found\n");
+ return added;
+}
+
+static int iwl_get_channels_for_scan(struct iwl_priv *priv,
+ struct ieee80211_vif *vif,
+ enum ieee80211_band band,
+ u8 is_active, u8 n_probes,
+ struct iwl_scan_channel *scan_ch)
+{
+ struct ieee80211_channel *chan;
+ const struct ieee80211_supported_band *sband;
+ const struct iwl_channel_info *ch_info;
+ u16 passive_dwell = 0;
+ u16 active_dwell = 0;
+ int added, i;
+ u16 channel;
+
+ sband = iwl_get_hw_mode(priv, band);
+ if (!sband)
+ return 0;
+
+ active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
+ passive_dwell = iwl_get_passive_dwell_time(priv, band);
+
+ if (passive_dwell <= active_dwell)
+ passive_dwell = active_dwell + 1;
+
+ for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
+ chan = priv->scan_request->channels[i];
+
+ if (chan->band != band)
+ continue;
+
+ channel = chan->hw_value;
+ scan_ch->channel = cpu_to_le16(channel);
+
+ ch_info = iwl_get_channel_info(priv, band, channel);
+ if (!is_channel_valid(ch_info)) {
+ IWL_DEBUG_SCAN(priv,
+ "Channel %d is INVALID for this band.\n",
+ channel);
+ continue;
+ }
+
+ if (!is_active || is_channel_passive(ch_info) ||
+ (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
+ scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
+ else
+ scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
+
+ if (n_probes)
+ scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
+
+ scan_ch->active_dwell = cpu_to_le16(active_dwell);
+ scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
+
+ /* Set txpower levels to defaults */
+ scan_ch->dsp_atten = 110;
+
+ /* NOTE: if we were doing 6Mb OFDM for scans we'd use
+ * power level:
+ * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
+ */
+ if (band == IEEE80211_BAND_5GHZ)
+ scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
+ else
+ scan_ch->tx_gain = ((1 << 5) | (5 << 3));
+
+ IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
+ channel, le32_to_cpu(scan_ch->type),
+ (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
+ "ACTIVE" : "PASSIVE",
+ (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
+ active_dwell : passive_dwell);
+
+ scan_ch++;
+ added++;
+ }
+
+ IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
+ return added;
+}
+
+static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
+{
+ struct iwl_host_cmd cmd = {
+ .id = REPLY_SCAN_CMD,
+ .len = { sizeof(struct iwl_scan_cmd), },
+ .flags = CMD_SYNC,
+ };
+ struct iwl_scan_cmd *scan;
+ struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+ u32 rate_flags = 0;
+ u16 cmd_len;
+ u16 rx_chain = 0;
+ enum ieee80211_band band;
+ u8 n_probes = 0;
+ u8 rx_ant = hw_params(priv).valid_rx_ant;
+ u8 rate;
+ bool is_active = false;
+ int chan_mod;
+ u8 active_chains;
+ u8 scan_tx_antennas = hw_params(priv).valid_tx_ant;
+ int ret;
+
+ lockdep_assert_held(&priv->shrd->mutex);
+
+ if (vif)
+ ctx = iwl_rxon_ctx_from_vif(vif);
+
+ if (!priv->scan_cmd) {
+ priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
+ IWL_MAX_SCAN_SIZE, GFP_KERNEL);
+ if (!priv->scan_cmd) {
+ IWL_DEBUG_SCAN(priv,
+ "fail to allocate memory for scan\n");
+ return -ENOMEM;
+ }
+ }
+ scan = priv->scan_cmd;
+ memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
+
+ scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
+ scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
+
+ if (priv->scan_type != IWL_SCAN_ROC &&
+ iwl_is_any_associated(priv)) {
+ u16 interval = 0;
+ u32 extra;
+ u32 suspend_time = 100;
+ u32 scan_suspend_time = 100;
+
+ IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
+ switch (priv->scan_type) {
+ case IWL_SCAN_ROC:
+ WARN_ON(1);
+ break;
+ case IWL_SCAN_RADIO_RESET:
+ interval = 0;
+ break;
+ case IWL_SCAN_NORMAL:
+ interval = vif->bss_conf.beacon_int;
+ break;
+ }
+
+ scan->suspend_time = 0;
+ scan->max_out_time = cpu_to_le32(200 * 1024);
+ if (!interval)
+ interval = suspend_time;
+
+ extra = (suspend_time / interval) << 22;
+ scan_suspend_time = (extra |
+ ((suspend_time % interval) * 1024));
+ scan->suspend_time = cpu_to_le32(scan_suspend_time);
+ IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
+ scan_suspend_time, interval);
+ } else if (priv->scan_type == IWL_SCAN_ROC) {
+ scan->suspend_time = 0;
+ scan->max_out_time = 0;
+ scan->quiet_time = 0;
+ scan->quiet_plcp_th = 0;
+ }
+
+ switch (priv->scan_type) {
+ case IWL_SCAN_RADIO_RESET:
+ IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
+ break;
+ case IWL_SCAN_NORMAL:
+ if (priv->scan_request->n_ssids) {
+ int i, p = 0;
+ IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
+ for (i = 0; i < priv->scan_request->n_ssids; i++) {
+ /* always does wildcard anyway */
+ if (!priv->scan_request->ssids[i].ssid_len)
+ continue;
+ scan->direct_scan[p].id = WLAN_EID_SSID;
+ scan->direct_scan[p].len =
+ priv->scan_request->ssids[i].ssid_len;
+ memcpy(scan->direct_scan[p].ssid,
+ priv->scan_request->ssids[i].ssid,
+ priv->scan_request->ssids[i].ssid_len);
+ n_probes++;
+ p++;
+ }
+ is_active = true;
+ } else
+ IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
+ break;
+ case IWL_SCAN_ROC:
+ IWL_DEBUG_SCAN(priv, "Start ROC scan.\n");
+ break;
+ }
+
+ scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
+ scan->tx_cmd.sta_id = ctx->bcast_sta_id;
+ scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
+
+ switch (priv->scan_band) {
+ case IEEE80211_BAND_2GHZ:
+ scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
+ chan_mod = le32_to_cpu(
+ priv->contexts[IWL_RXON_CTX_BSS].active.flags &
+ RXON_FLG_CHANNEL_MODE_MSK)
+ >> RXON_FLG_CHANNEL_MODE_POS;
+ if (chan_mod == CHANNEL_MODE_PURE_40) {
+ rate = IWL_RATE_6M_PLCP;
+ } else {
+ rate = IWL_RATE_1M_PLCP;
+ rate_flags = RATE_MCS_CCK_MSK;
+ }
+ /*
+ * Internal scans are passive, so we can indiscriminately set
+ * the BT ignore flag on 2.4 GHz since it applies to TX only.
+ */
+ if (priv->cfg->bt_params &&
+ priv->cfg->bt_params->advanced_bt_coexist)
+ scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
+ break;
+ case IEEE80211_BAND_5GHZ:
+ rate = IWL_RATE_6M_PLCP;
+ break;
+ default:
+ IWL_WARN(priv, "Invalid scan band\n");
+ return -EIO;
+ }
+
+ /*
+ * If active scanning is requested but a certain channel is
+ * marked passive, we can do active scanning if we detect
+ * transmissions.
+ *
+ * There is an issue with some firmware versions that triggers
+ * a sysassert on a "good CRC threshold" of zero (== disabled),
+ * on a radar channel even though this means that we should NOT
+ * send probes.
+ *
+ * The "good CRC threshold" is the number of frames that we
+ * need to receive during our dwell time on a channel before
+ * sending out probes -- setting this to a huge value will
+ * mean we never reach it, but at the same time work around
+ * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
+ * here instead of IWL_GOOD_CRC_TH_DISABLED.
+ *
+ * This was fixed in later versions along with some other
+ * scan changes, and the threshold behaves as a flag in those
+ * versions.
+ */
+ if (priv->new_scan_threshold_behaviour)
+ scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
+ IWL_GOOD_CRC_TH_DISABLED;
+ else
+ scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
+ IWL_GOOD_CRC_TH_NEVER;
+
+ band = priv->scan_band;
+
+ if (priv->cfg->scan_rx_antennas[band])
+ rx_ant = priv->cfg->scan_rx_antennas[band];
+
+ if (band == IEEE80211_BAND_2GHZ &&
+ priv->cfg->bt_params &&
+ priv->cfg->bt_params->advanced_bt_coexist) {
+ /* transmit 2.4 GHz probes only on first antenna */
+ scan_tx_antennas = first_antenna(scan_tx_antennas);
+ }
+
+ priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv,
+ priv->scan_tx_ant[band],
+ scan_tx_antennas);
+ rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
+ scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
+
+ /* In power save mode use one chain, otherwise use all chains */
+ if (test_bit(STATUS_POWER_PMI, &priv->shrd->status)) {
+ /* rx_ant has been set to all valid chains previously */
+ active_chains = rx_ant &
+ ((u8)(priv->chain_noise_data.active_chains));
+ if (!active_chains)
+ active_chains = rx_ant;
+
+ IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
+ priv->chain_noise_data.active_chains);
+
+ rx_ant = first_antenna(active_chains);
+ }
+ if (priv->cfg->bt_params &&
+ priv->cfg->bt_params->advanced_bt_coexist &&
+ priv->bt_full_concurrent) {
+ /* operated as 1x1 in full concurrency mode */
+ rx_ant = first_antenna(rx_ant);
+ }
+
+ /* MIMO is not used here, but value is required */
+ rx_chain |=
+ hw_params(priv).valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
+ rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
+ rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
+ rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
+ scan->rx_chain = cpu_to_le16(rx_chain);
+ switch (priv->scan_type) {
+ case IWL_SCAN_NORMAL:
+ cmd_len = iwl_fill_probe_req(priv,
+ (struct ieee80211_mgmt *)scan->data,
+ vif->addr,
+ priv->scan_request->ie,
+ priv->scan_request->ie_len,
+ IWL_MAX_SCAN_SIZE - sizeof(*scan));
+ break;
+ case IWL_SCAN_RADIO_RESET:
+ case IWL_SCAN_ROC:
+ /* use bcast addr, will not be transmitted but must be valid */
+ cmd_len = iwl_fill_probe_req(priv,
+ (struct ieee80211_mgmt *)scan->data,
+ iwl_bcast_addr, NULL, 0,
+ IWL_MAX_SCAN_SIZE - sizeof(*scan));
+ break;
+ default:
+ BUG();
+ }
+ scan->tx_cmd.len = cpu_to_le16(cmd_len);
+
+ scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
+ RXON_FILTER_BCON_AWARE_MSK);
+
+ switch (priv->scan_type) {
+ case IWL_SCAN_RADIO_RESET:
+ scan->channel_count =
+ iwl_get_single_channel_for_scan(priv, vif, band,
+ (void *)&scan->data[cmd_len]);
+ break;
+ case IWL_SCAN_NORMAL:
+ scan->channel_count =
+ iwl_get_channels_for_scan(priv, vif, band,
+ is_active, n_probes,
+ (void *)&scan->data[cmd_len]);
+ break;
+ case IWL_SCAN_ROC: {
+ struct iwl_scan_channel *scan_ch;
+
+ scan->channel_count = 1;
+
+ scan_ch = (void *)&scan->data[cmd_len];
+ scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
+ scan_ch->channel =
+ cpu_to_le16(priv->hw_roc_channel->hw_value);
+ scan_ch->active_dwell =
+ scan_ch->passive_dwell =
+ cpu_to_le16(priv->hw_roc_duration);
+
+ /* Set txpower levels to defaults */
+ scan_ch->dsp_atten = 110;
+
+ /* NOTE: if we were doing 6Mb OFDM for scans we'd use
+ * power level:
+ * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
+ */
+ if (priv->hw_roc_channel->band == IEEE80211_BAND_5GHZ)
+ scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
+ else
+ scan_ch->tx_gain = ((1 << 5) | (5 << 3));
+ }
+ break;
+ }
+
+ if (scan->channel_count == 0) {
+ IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
+ return -EIO;
+ }
+
+ cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) +
+ scan->channel_count * sizeof(struct iwl_scan_channel);
+ cmd.data[0] = scan;
+ cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
+ scan->len = cpu_to_le16(cmd.len[0]);
+
+ /* set scan bit here for PAN params */
+ set_bit(STATUS_SCAN_HW, &priv->shrd->status);
+
+ ret = iwlagn_set_pan_params(priv);
+ if (ret)
+ return ret;
+
+ ret = iwl_trans_send_cmd(trans(priv), &cmd);
+ if (ret) {
+ clear_bit(STATUS_SCAN_HW, &priv->shrd->status);
+ iwlagn_set_pan_params(priv);
+ }
+
+ return ret;
+}
+
void iwl_init_scan_params(struct iwl_priv *priv)
{
u8 ant_idx = fls(hw_params(priv).valid_tx_ant) - 1;
projects / cascardo / linux.git / commitdiff