1 files changed, 124 insertions, 60 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index 3c803f6922ef..23644cf884f1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -2,7 +2,7 @@
  *
  * GPL LICENSE SUMMARY
  *
- * Copyright(c) 2008 Intel Corporation. All rights reserved.
+ * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -46,15 +46,6 @@
 #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3)
 #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2)
 
-/* For faster active scanning, scan will move to the next channel if fewer than
- * PLCP_QUIET_THRESH packets are heard on this channel within
- * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
- * time if it's a quiet channel (nothing responded to our probe, and there's
- * no other traffic).
- * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
-#define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)  /* packets */
-#define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(10)  /* msec */
-
 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
  * Must be set longer than active dwell time.
  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
@@ -63,7 +54,6 @@
 #define IWL_PASSIVE_DWELL_BASE      (100)
 #define IWL_CHANNEL_TUNE_TIME       5
 
-#define IWL_SCAN_PROBE_MASK(n) 	cpu_to_le32((BIT(n) | (BIT(n) - BIT(1))))
 
 
 /**
@@ -80,12 +70,12 @@ int iwl_scan_cancel(struct iwl_priv *priv)
 
 	if (test_bit(STATUS_SCANNING, &priv->status)) {
 		if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
-			IWL_DEBUG_SCAN("Queuing scan abort.\n");
+			IWL_DEBUG_SCAN(priv, "Queuing scan abort.\n");
 			set_bit(STATUS_SCAN_ABORTING, &priv->status);
 			queue_work(priv->workqueue, &priv->abort_scan);
 
 		} else
-			IWL_DEBUG_SCAN("Scan abort already in progress.\n");
+			IWL_DEBUG_SCAN(priv, "Scan abort already in progress.\n");
 
 		return test_bit(STATUS_SCANNING, &priv->status);
 	}
@@ -119,7 +109,7 @@ int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
 }
 EXPORT_SYMBOL(iwl_scan_cancel_timeout);
 
-static int iwl_send_scan_abort(struct iwl_priv *priv)
+int iwl_send_scan_abort(struct iwl_priv *priv)
 {
 	int ret = 0;
 	struct iwl_rx_packet *res;
@@ -150,7 +140,7 @@ static int iwl_send_scan_abort(struct iwl_priv *priv)
 		 * can occur if we send the scan abort before we
 		 * the microcode has notified us that a scan is
 		 * completed. */
-		IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
+		IWL_DEBUG_INFO(priv, "SCAN_ABORT returned %d.\n", res->u.status);
 		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 		clear_bit(STATUS_SCAN_HW, &priv->status);
 	}
@@ -160,7 +150,7 @@ static int iwl_send_scan_abort(struct iwl_priv *priv)
 
 	return ret;
 }
-
+EXPORT_SYMBOL(iwl_send_scan_abort);
 
 /* Service response to REPLY_SCAN_CMD (0x80) */
 static void iwl_rx_reply_scan(struct iwl_priv *priv,
@@ -171,7 +161,7 @@ static void iwl_rx_reply_scan(struct iwl_priv *priv,
 	struct iwl_scanreq_notification *notif =
 	    (struct iwl_scanreq_notification *)pkt->u.raw;
 
-	IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
+	IWL_DEBUG_RX(priv, "Scan request status = 0x%x\n", notif->status);
 #endif
 }
 
@@ -183,7 +173,7 @@ static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
 	struct iwl_scanstart_notification *notif =
 	    (struct iwl_scanstart_notification *)pkt->u.raw;
 	priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
-	IWL_DEBUG_SCAN("Scan start: "
+	IWL_DEBUG_SCAN(priv, "Scan start: "
 		       "%d [802.11%s] "
 		       "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
 		       notif->channel,
@@ -202,7 +192,7 @@ static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
 	struct iwl_scanresults_notification *notif =
 	    (struct iwl_scanresults_notification *)pkt->u.raw;
 
-	IWL_DEBUG_SCAN("Scan ch.res: "
+	IWL_DEBUG_SCAN(priv, "Scan ch.res: "
 		       "%d [802.11%s] "
 		       "(TSF: 0x%08X:%08X) - %d "
 		       "elapsed=%lu usec (%dms since last)\n",
@@ -228,7 +218,7 @@ static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
 	struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 	struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
 
-	IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
+	IWL_DEBUG_SCAN(priv, "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
 		       scan_notif->scanned_channels,
 		       scan_notif->tsf_low,
 		       scan_notif->tsf_high, scan_notif->status);
@@ -240,7 +230,7 @@ static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
 	/* The scan completion notification came in, so kill that timer... */
 	cancel_delayed_work(&priv->scan_check);
 
-	IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
+	IWL_DEBUG_INFO(priv, "Scan pass on %sGHz took %dms\n",
 		       (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
 						"2.4" : "5.2",
 		       jiffies_to_msecs(elapsed_jiffies
@@ -258,7 +248,7 @@ static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
 	 * then we reset the scan state machine and terminate,
 	 * re-queuing another scan if one has been requested */
 	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
-		IWL_DEBUG_INFO("Aborted scan completed.\n");
+		IWL_DEBUG_INFO(priv, "Aborted scan completed.\n");
 		clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 	} else {
 		/* If there are more bands on this scan pass reschedule */
@@ -268,11 +258,11 @@ static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
 
 	priv->last_scan_jiffies = jiffies;
 	priv->next_scan_jiffies = 0;
-	IWL_DEBUG_INFO("Setting scan to off\n");
+	IWL_DEBUG_INFO(priv, "Setting scan to off\n");
 
 	clear_bit(STATUS_SCANNING, &priv->status);
 
-	IWL_DEBUG_INFO("Scan took %dms\n",
+	IWL_DEBUG_INFO(priv, "Scan took %dms\n",
 		jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
 
 	queue_work(priv->workqueue, &priv->scan_completed);
@@ -296,9 +286,9 @@ void iwl_setup_rx_scan_handlers(struct iwl_priv *priv)
 }
 EXPORT_SYMBOL(iwl_setup_rx_scan_handlers);
 
-static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
-					    enum ieee80211_band band,
-					    u8 n_probes)
+inline 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 +
@@ -307,9 +297,10 @@ static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
 		return IWL_ACTIVE_DWELL_TIME_24 +
 			IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
 }
+EXPORT_SYMBOL(iwl_get_active_dwell_time);
 
-static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
-				      enum ieee80211_band band)
+u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
+			       enum ieee80211_band band)
 {
 	u16 passive = (band == IEEE80211_BAND_2GHZ) ?
 	    IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
@@ -327,6 +318,7 @@ static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
 
 	return passive;
 }
+EXPORT_SYMBOL(iwl_get_passive_dwell_time);
 
 static int iwl_get_channels_for_scan(struct iwl_priv *priv,
 				     enum ieee80211_band band,
@@ -363,7 +355,7 @@ static int iwl_get_channels_for_scan(struct iwl_priv *priv,
 
 		ch_info = iwl_get_channel_info(priv, band, channel);
 		if (!is_channel_valid(ch_info)) {
-			IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
+			IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
 					channel);
 			continue;
 		}
@@ -392,7 +384,7 @@ static int iwl_get_channels_for_scan(struct iwl_priv *priv,
 		else
 			scan_ch->tx_gain = ((1 << 5) | (5 << 3));
 
-		IWL_DEBUG_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n",
+		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",
@@ -403,7 +395,7 @@ static int iwl_get_channels_for_scan(struct iwl_priv *priv,
 		added++;
 	}
 
-	IWL_DEBUG_SCAN("total channels to scan %d \n", added);
+	IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
 	return added;
 }
 
@@ -419,21 +411,21 @@ void iwl_init_scan_params(struct iwl_priv *priv)
 int iwl_scan_initiate(struct iwl_priv *priv)
 {
 	if (!iwl_is_ready_rf(priv)) {
-		IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
+		IWL_DEBUG_SCAN(priv, "Aborting scan due to not ready.\n");
 		return -EIO;
 	}
 
 	if (test_bit(STATUS_SCANNING, &priv->status)) {
-		IWL_DEBUG_SCAN("Scan already in progress.\n");
+		IWL_DEBUG_SCAN(priv, "Scan already in progress.\n");
 		return -EAGAIN;
 	}
 
 	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
-		IWL_DEBUG_SCAN("Scan request while abort pending\n");
+		IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n");
 		return -EAGAIN;
 	}
 
-	IWL_DEBUG_INFO("Starting scan...\n");
+	IWL_DEBUG_INFO(priv, "Starting scan...\n");
 	if (priv->cfg->sku & IWL_SKU_G)
 		priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
 	if (priv->cfg->sku & IWL_SKU_A)
@@ -448,9 +440,77 @@ int iwl_scan_initiate(struct iwl_priv *priv)
 }
 EXPORT_SYMBOL(iwl_scan_initiate);
 
+#define IWL_DELAY_NEXT_SCAN (HZ*2)
+
+int iwl_mac_hw_scan(struct ieee80211_hw *hw,
+		     struct cfg80211_scan_request *req)
+{
+	unsigned long flags;
+	struct iwl_priv *priv = hw->priv;
+	int ret;
+	u8 *ssid = NULL;
+	size_t ssid_len = 0;
+
+	if (req->n_ssids) {
+		ssid = req->ssids[0].ssid;
+		ssid_len = req->ssids[0].ssid_len;
+	}
+
+	IWL_DEBUG_MAC80211(priv, "enter\n");
+
+	mutex_lock(&priv->mutex);
+	spin_lock_irqsave(&priv->lock, flags);
+
+	if (!iwl_is_ready_rf(priv)) {
+		ret = -EIO;
+		IWL_DEBUG_MAC80211(priv, "leave - not ready or exit pending\n");
+		goto out_unlock;
+	}
+
+	/* We don't schedule scan within next_scan_jiffies period.
+	 * Avoid scanning during possible EAPOL exchange, return
+	 * success immediately.
+	 */
+	if (priv->next_scan_jiffies &&
+	    time_after(priv->next_scan_jiffies, jiffies)) {
+		IWL_DEBUG_SCAN(priv, "scan rejected: within next scan period\n");
+		queue_work(priv->workqueue, &priv->scan_completed);
+		ret = 0;
+		goto out_unlock;
+	}
+
+	/* if we just finished scan ask for delay */
+	if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
+	    time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
+		IWL_DEBUG_SCAN(priv, "scan rejected: within previous scan period\n");
+		queue_work(priv->workqueue, &priv->scan_completed);
+		ret = 0;
+		goto out_unlock;
+	}
+
+	if (ssid_len) {
+		priv->one_direct_scan = 1;
+		priv->direct_ssid_len =  ssid_len;
+		memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
+	} else {
+		priv->one_direct_scan = 0;
+	}
+
+	ret = iwl_scan_initiate(priv);
+
+	IWL_DEBUG_MAC80211(priv, "leave\n");
+
+out_unlock:
+	spin_unlock_irqrestore(&priv->lock, flags);
+	mutex_unlock(&priv->mutex);
+
+	return ret;
+}
+EXPORT_SYMBOL(iwl_mac_hw_scan);
+
 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
 
-static void iwl_bg_scan_check(struct work_struct *data)
+void iwl_bg_scan_check(struct work_struct *data)
 {
 	struct iwl_priv *priv =
 	    container_of(data, struct iwl_priv, scan_check.work);
@@ -461,7 +521,7 @@ static void iwl_bg_scan_check(struct work_struct *data)
 	mutex_lock(&priv->mutex);
 	if (test_bit(STATUS_SCANNING, &priv->status) ||
 	    test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
-		IWL_DEBUG(IWL_DL_SCAN, "Scan completion watchdog resetting "
+		IWL_DEBUG_SCAN(priv, "Scan completion watchdog resetting "
 			"adapter (%dms)\n",
 			jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
 
@@ -470,6 +530,8 @@ static void iwl_bg_scan_check(struct work_struct *data)
 	}
 	mutex_unlock(&priv->mutex);
 }
+EXPORT_SYMBOL(iwl_bg_scan_check);
+
 /**
  * iwl_supported_rate_to_ie - fill in the supported rate in IE field
  *
@@ -527,10 +589,10 @@ static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
  * iwl_fill_probe_req - fill in all required fields and IE for probe request
  */
 
-static u16 iwl_fill_probe_req(struct iwl_priv *priv,
-				  enum ieee80211_band band,
-				  struct ieee80211_mgmt *frame,
-				  int left)
+u16 iwl_fill_probe_req(struct iwl_priv *priv,
+		       enum ieee80211_band band,
+		       struct ieee80211_mgmt *frame,
+		       int left)
 {
 	int len = 0;
 	u8 *pos = NULL;
@@ -624,6 +686,7 @@ static u16 iwl_fill_probe_req(struct iwl_priv *priv,
 
 	return (u16)len;
 }
+EXPORT_SYMBOL(iwl_fill_probe_req);
 
 static void iwl_bg_request_scan(struct work_struct *data)
 {
@@ -650,7 +713,7 @@ static void iwl_bg_request_scan(struct work_struct *data)
 	mutex_lock(&priv->mutex);
 
 	if (!iwl_is_ready(priv)) {
-		IWL_WARNING("request scan called when driver not ready.\n");
+		IWL_WARN(priv, "request scan called when driver not ready.\n");
 		goto done;
 	}
 
@@ -662,34 +725,34 @@ static void iwl_bg_request_scan(struct work_struct *data)
 	/* 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. "
+		IWL_DEBUG_INFO(priv, "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");
+		IWL_DEBUG_SCAN(priv, "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");
+		IWL_DEBUG_HC(priv, "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");
+		IWL_DEBUG_HC(priv, "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");
+		IWL_DEBUG_HC(priv, "Scan request while uninitialized.  Queuing.\n");
 		goto done;
 	}
 
 	if (!priv->scan_bands) {
-		IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
+		IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
 		goto done;
 	}
 
@@ -714,7 +777,7 @@ static void iwl_bg_request_scan(struct work_struct *data)
 		u32 scan_suspend_time = 100;
 		unsigned long flags;
 
-		IWL_DEBUG_INFO("Scanning while associated...\n");
+		IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
 
 		spin_lock_irqsave(&priv->lock, flags);
 		interval = priv->beacon_int;
@@ -729,13 +792,13 @@ static void iwl_bg_request_scan(struct work_struct *data)
 		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",
+		IWL_DEBUG_SCAN(priv, "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_DEBUG_SCAN(priv, "Start direct scan for '%s'\n",
 				print_ssid(ssid, priv->direct_ssid,
 					   priv->direct_ssid_len));
 		scan->direct_scan[0].id = WLAN_EID_SSID;
@@ -744,7 +807,7 @@ static void iwl_bg_request_scan(struct work_struct *data)
 		       priv->direct_ssid, priv->direct_ssid_len);
 		n_probes++;
 	} else {
-		IWL_DEBUG_SCAN("Start indirect scan.\n");
+		IWL_DEBUG_SCAN(priv, "Start indirect scan.\n");
 	}
 
 	scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
@@ -773,7 +836,7 @@ static void iwl_bg_request_scan(struct work_struct *data)
 		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");
+		IWL_WARN(priv, "Invalid scan band count\n");
 		goto done;
 	}
 
@@ -806,7 +869,7 @@ static void iwl_bg_request_scan(struct work_struct *data)
 			(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);
+		IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
 		goto done;
 	}
 
@@ -839,7 +902,7 @@ static void iwl_bg_request_scan(struct work_struct *data)
 	mutex_unlock(&priv->mutex);
 }
 
-static void iwl_bg_abort_scan(struct work_struct *work)
+void iwl_bg_abort_scan(struct work_struct *work)
 {
 	struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
 
@@ -853,18 +916,19 @@ static void iwl_bg_abort_scan(struct work_struct *work)
 
 	mutex_unlock(&priv->mutex);
 }
+EXPORT_SYMBOL(iwl_bg_abort_scan);
 
-static void iwl_bg_scan_completed(struct work_struct *work)
+void iwl_bg_scan_completed(struct work_struct *work)
 {
 	struct iwl_priv *priv =
 	    container_of(work, struct iwl_priv, scan_completed);
 
-	IWL_DEBUG_SCAN("SCAN complete scan\n");
+	IWL_DEBUG_SCAN(priv, "SCAN complete scan\n");
 
 	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 		return;
 
-	ieee80211_scan_completed(priv->hw);
+	ieee80211_scan_completed(priv->hw, false);
 
 	/* Since setting the TXPOWER may have been deferred while
 	 * performing the scan, fire one off */
@@ -872,7 +936,7 @@ static void iwl_bg_scan_completed(struct work_struct *work)
 	iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 	mutex_unlock(&priv->mutex);
 }
-
+EXPORT_SYMBOL(iwl_bg_scan_completed);
 
 void iwl_setup_scan_deferred_work(struct iwl_priv *priv)
 {