コード例 #1
0
void iwl_bg_abort_scan(struct work_struct *work)
{
	struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);

	if (!test_bit(STATUS_READY, &priv->status) ||
	    !test_bit(STATUS_GEO_CONFIGURED, &priv->status))
		return;

	cancel_delayed_work(&priv->scan_check);

	mutex_lock(&priv->mutex);
	if (test_bit(STATUS_SCAN_ABORTING, &priv->status))
		iwl_send_scan_abort(priv);
	mutex_unlock(&priv->mutex);
}
コード例 #2
0
void iwl_bg_scan_check(struct work_struct *data)
{
	struct iwl_priv *priv =
	    container_of(data, struct iwl_priv, scan_check.work);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);
	if (test_bit(STATUS_SCANNING, &priv->status) &&
	    !test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG_SCAN(priv, "Scan completion watchdog (%dms)\n",
			       jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));

		if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
			iwl_send_scan_abort(priv);
	}
	mutex_unlock(&priv->mutex);
}
コード例 #3
0
ファイル: scan.c プロジェクト: EvolutionMod/ath10-lenovo
static void iwl_do_scan_abort(struct iwl_priv *priv)
{
    int ret;

    lockdep_assert_held(&priv->mutex);

    if (!test_bit(STATUS_SCANNING, &priv->status)) {
        IWL_DEBUG_SCAN(priv, "Not performing scan to abort\n");
        return;
    }

    if (test_and_set_bit(STATUS_SCAN_ABORTING, &priv->status)) {
        IWL_DEBUG_SCAN(priv, "Scan abort in progress\n");
        return;
    }

    ret = iwl_send_scan_abort(priv);
    if (ret) {
        IWL_DEBUG_SCAN(priv, "Send scan abort failed %d\n", ret);
        iwl_force_scan_end(priv);
    } else
        IWL_DEBUG_SCAN(priv, "Successfully send scan abort\n");
}
コード例 #4
0
static void iwl_bg_request_scan(struct work_struct *data)
{
	struct iwl_priv *priv =
	    container_of(data, struct iwl_priv, request_scan);
	struct iwl_host_cmd cmd = {
		.id = REPLY_SCAN_CMD,
		.len = sizeof(struct iwl_scan_cmd),
		.meta.flags = CMD_SIZE_HUGE,
	};
	struct iwl_scan_cmd *scan;
	struct ieee80211_conf *conf = NULL;
	int ret = 0;
	u32 tx_ant;
	u16 cmd_len;
	enum ieee80211_band band;
	u8 n_probes = 2;
	u8 rx_chain = priv->hw_params.valid_rx_ant;

	conf = ieee80211_get_hw_conf(priv->hw);

	mutex_lock(&priv->mutex);

	if (!iwl_is_ready(priv)) {
		IWL_WARNING("request scan called when driver not ready.\n");
		goto done;
	}

	/* Make sure the scan wasn't cancelled before this queued work
	 * was given the chance to run... */
	if (!test_bit(STATUS_SCANNING, &priv->status))
		goto done;

	/* This should never be called or scheduled if there is currently
	 * a scan active in the hardware. */
	if (test_bit(STATUS_SCAN_HW, &priv->status)) {
		IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
			       "Ignoring second request.\n");
		ret = -EIO;
		goto done;
	}

	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
		goto done;
	}

	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
		goto done;
	}

	if (iwl_is_rfkill(priv)) {
		IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
		goto done;
	}

	if (!test_bit(STATUS_READY, &priv->status)) {
		IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
		goto done;
	}

	if (!priv->scan_bands) {
		IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
		goto done;
	}

	if (!priv->scan) {
		priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
				     IWL_MAX_SCAN_SIZE, GFP_KERNEL);
		if (!priv->scan) {
			ret = -ENOMEM;
			goto done;
		}
	}
	scan = priv->scan;
	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 (iwl_is_associated(priv)) {
		u16 interval = 0;
		u32 extra;
		u32 suspend_time = 100;
		u32 scan_suspend_time = 100;
		unsigned long flags;

		IWL_DEBUG_INFO("Scanning while associated...\n");

		spin_lock_irqsave(&priv->lock, flags);
		interval = priv->beacon_int;
		spin_unlock_irqrestore(&priv->lock, flags);

		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("suspend_time 0x%X beacon interval %d\n",
			       scan_suspend_time, interval);
	}

	/* We should add the ability for user to lock to PASSIVE ONLY */
	if (priv->one_direct_scan) {
		IWL_DEBUG_SCAN("Start direct scan for '%s'\n",
				iwl_escape_essid(priv->direct_ssid,
				priv->direct_ssid_len));
		scan->direct_scan[0].id = WLAN_EID_SSID;
		scan->direct_scan[0].len = priv->direct_ssid_len;
		memcpy(scan->direct_scan[0].ssid,
		       priv->direct_ssid, priv->direct_ssid_len);
		n_probes++;
	} else if (!iwl_is_associated(priv) && priv->essid_len) {
		IWL_DEBUG_SCAN("Start direct scan for '%s' (not associated)\n",
				iwl_escape_essid(priv->essid, priv->essid_len));
		scan->direct_scan[0].id = WLAN_EID_SSID;
		scan->direct_scan[0].len = priv->essid_len;
		memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
		n_probes++;
	} else {
		IWL_DEBUG_SCAN("Start indirect scan.\n");
	}

	scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
	scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
	scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;


	if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
		band = IEEE80211_BAND_2GHZ;
		scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
		tx_ant = iwl_scan_tx_ant(priv, band);
		if (priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK)
			scan->tx_cmd.rate_n_flags =
				iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
							tx_ant);
		else
			scan->tx_cmd.rate_n_flags =
				iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
							tx_ant |
							RATE_MCS_CCK_MSK);
		scan->good_CRC_th = 0;
	} else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
		band = IEEE80211_BAND_5GHZ;
		tx_ant = iwl_scan_tx_ant(priv, band);
		scan->tx_cmd.rate_n_flags =
				iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
							tx_ant);
		scan->good_CRC_th = IWL_GOOD_CRC_TH;

		/* Force use of chains B and C (0x6) for scan Rx for 4965
		 * Avoid A (0x1) because of its off-channel reception on A-band.
		 * MIMO is not used here, but value is required */
		if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
			rx_chain = 0x6;
	} else {
		IWL_WARNING("Invalid scan band count\n");
		goto done;
	}

	scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
				cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
				(rx_chain << RXON_RX_CHAIN_FORCE_SEL_POS) |
				(0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));

	cmd_len = iwl_fill_probe_req(priv, band,
				     (struct ieee80211_mgmt *)scan->data,
				     IWL_MAX_SCAN_SIZE - sizeof(*scan));

	scan->tx_cmd.len = cpu_to_le16(cmd_len);

	if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
		scan->filter_flags = RXON_FILTER_PROMISC_MSK;

	scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
			       RXON_FILTER_BCON_AWARE_MSK);

	scan->channel_count =
		iwl_get_channels_for_scan(priv, band, 1, /* active */
			n_probes,
			(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);

	if (scan->channel_count == 0) {
		IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count);
		goto done;
	}

	cmd.len += le16_to_cpu(scan->tx_cmd.len) +
	    scan->channel_count * sizeof(struct iwl_scan_channel);
	cmd.data = scan;
	scan->len = cpu_to_le16(cmd.len);

	set_bit(STATUS_SCAN_HW, &priv->status);
	ret = iwl_send_cmd_sync(priv, &cmd);
	if (ret)
		goto done;

	queue_delayed_work(priv->workqueue, &priv->scan_check,
			   IWL_SCAN_CHECK_WATCHDOG);

	mutex_unlock(&priv->mutex);
	return;

 done:
	/* inform mac80211 scan aborted */
	queue_work(priv->workqueue, &priv->scan_completed);
	mutex_unlock(&priv->mutex);
}

static void iwl_bg_abort_scan(struct work_struct *work)
{
	struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);

	if (!iwl_is_ready(priv))
		return;

	mutex_lock(&priv->mutex);

	set_bit(STATUS_SCAN_ABORTING, &priv->status);
	iwl_send_scan_abort(priv);

	mutex_unlock(&priv->mutex);
}

void iwl_setup_scan_deferred_work(struct iwl_priv *priv)
{
	/*  FIXME: move here when resolved PENDING
	 *  INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed); */
	INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
	INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
	INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
}