diff options
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-lib.c | 427 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn.h | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-core.h | 6 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-scan.c | 439 |
4 files changed, 433 insertions, 440 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c index e8b324c84da8..0a1f331cb572 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c @@ -190,433 +190,6 @@ int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band) 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) { diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.h b/drivers/net/wireless/iwlwifi/iwl-agn.h index 4bc1f4669e5a..5c4f8c72ee60 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.h +++ b/drivers/net/wireless/iwlwifi/iwl-agn.h @@ -146,7 +146,6 @@ static inline bool iwl_is_tx_success(u32 status) 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); diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h index 6d7ad45c6d6f..74d4cff09fae 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.h +++ b/drivers/net/wireless/iwlwifi/iwl-core.h @@ -330,12 +330,6 @@ int iwl_force_reset(struct iwl_priv *priv, int mode, bool external); 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, diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c index fc5af3475392..8ac6b05c6c78 100644 --- a/drivers/net/wireless/iwlwifi/iwl-scan.c +++ b/drivers/net/wireless/iwlwifi/iwl-scan.c @@ -299,9 +299,8 @@ void iwl_setup_rx_scan_handlers(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 + @@ -311,9 +310,8 @@ inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, 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) ? @@ -342,6 +340,435 @@ u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, 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; |