2008-06-12 09:47:10 +08:00
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/******************************************************************************
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*
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* GPL LICENSE SUMMARY
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*
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2009-01-09 02:20:02 +08:00
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* Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
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2008-06-12 09:47:10 +08:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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2008-12-10 03:28:58 +08:00
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* Intel Linux Wireless <ilw@linux.intel.com>
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2008-06-12 09:47:10 +08:00
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*****************************************************************************/
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2008-09-25 06:13:14 +08:00
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#include <linux/types.h>
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2008-06-12 09:47:10 +08:00
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#include <linux/etherdevice.h>
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2008-09-25 06:13:14 +08:00
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#include <net/mac80211.h>
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2008-06-12 09:47:10 +08:00
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#include "iwl-eeprom.h"
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#include "iwl-dev.h"
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#include "iwl-core.h"
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#include "iwl-sta.h"
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#include "iwl-io.h"
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#include "iwl-helpers.h"
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/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
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* sending probe req. This should be set long enough to hear probe responses
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* from more than one AP. */
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2008-07-11 11:53:39 +08:00
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#define IWL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */
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#define IWL_ACTIVE_DWELL_TIME_52 (20)
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#define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3)
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#define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2)
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2008-06-12 09:47:10 +08:00
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/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
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* Must be set longer than active dwell time.
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* For the most reliable scan, set > AP beacon interval (typically 100msec). */
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#define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
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#define IWL_PASSIVE_DWELL_TIME_52 (10)
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#define IWL_PASSIVE_DWELL_BASE (100)
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#define IWL_CHANNEL_TUNE_TIME 5
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2008-07-11 11:53:39 +08:00
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2008-06-12 09:47:10 +08:00
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/**
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* iwl_scan_cancel - Cancel any currently executing HW scan
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*
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* NOTE: priv->mutex is not required before calling this function
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*/
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int iwl_scan_cancel(struct iwl_priv *priv)
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{
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if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
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clear_bit(STATUS_SCANNING, &priv->status);
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return 0;
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}
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if (test_bit(STATUS_SCANNING, &priv->status)) {
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if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
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2009-01-28 06:27:56 +08:00
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IWL_DEBUG_SCAN(priv, "Queuing scan abort.\n");
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2008-06-12 09:47:10 +08:00
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set_bit(STATUS_SCAN_ABORTING, &priv->status);
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queue_work(priv->workqueue, &priv->abort_scan);
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} else
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2009-01-28 06:27:56 +08:00
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IWL_DEBUG_SCAN(priv, "Scan abort already in progress.\n");
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2008-06-12 09:47:10 +08:00
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return test_bit(STATUS_SCANNING, &priv->status);
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}
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return 0;
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}
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EXPORT_SYMBOL(iwl_scan_cancel);
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/**
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* iwl_scan_cancel_timeout - Cancel any currently executing HW scan
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* @ms: amount of time to wait (in milliseconds) for scan to abort
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*
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* NOTE: priv->mutex must be held before calling this function
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*/
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int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
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{
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unsigned long now = jiffies;
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int ret;
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ret = iwl_scan_cancel(priv);
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if (ret && ms) {
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mutex_unlock(&priv->mutex);
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while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
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test_bit(STATUS_SCANNING, &priv->status))
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msleep(1);
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mutex_lock(&priv->mutex);
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return test_bit(STATUS_SCANNING, &priv->status);
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}
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return ret;
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}
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EXPORT_SYMBOL(iwl_scan_cancel_timeout);
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2009-06-20 04:52:44 +08:00
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static int iwl_send_scan_abort(struct iwl_priv *priv)
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2008-06-12 09:47:10 +08:00
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{
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int ret = 0;
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2009-10-09 17:19:45 +08:00
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struct iwl_rx_packet *pkt;
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2008-06-12 09:47:10 +08:00
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struct iwl_host_cmd cmd = {
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.id = REPLY_SCAN_ABORT_CMD,
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2009-07-25 02:13:05 +08:00
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.flags = CMD_WANT_SKB,
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2008-06-12 09:47:10 +08:00
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};
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/* If there isn't a scan actively going on in the hardware
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* then we are in between scan bands and not actually
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* actively scanning, so don't send the abort command */
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if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
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clear_bit(STATUS_SCAN_ABORTING, &priv->status);
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return 0;
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}
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ret = iwl_send_cmd_sync(priv, &cmd);
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if (ret) {
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clear_bit(STATUS_SCAN_ABORTING, &priv->status);
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return ret;
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}
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2009-10-09 17:19:45 +08:00
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pkt = (struct iwl_rx_packet *)cmd.reply_page;
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if (pkt->u.status != CAN_ABORT_STATUS) {
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2008-06-12 09:47:10 +08:00
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/* The scan abort will return 1 for success or
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* 2 for "failure". A failure condition can be
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* due to simply not being in an active scan which
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* can occur if we send the scan abort before we
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* the microcode has notified us that a scan is
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* completed. */
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2009-10-09 17:19:45 +08:00
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IWL_DEBUG_INFO(priv, "SCAN_ABORT returned %d.\n", pkt->u.status);
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2008-06-12 09:47:10 +08:00
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clear_bit(STATUS_SCAN_ABORTING, &priv->status);
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clear_bit(STATUS_SCAN_HW, &priv->status);
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}
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2009-10-09 17:19:45 +08:00
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priv->alloc_rxb_page--;
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free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
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2008-06-12 09:47:10 +08:00
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return ret;
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}
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/* Service response to REPLY_SCAN_CMD (0x80) */
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static void iwl_rx_reply_scan(struct iwl_priv *priv,
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struct iwl_rx_mem_buffer *rxb)
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{
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#ifdef CONFIG_IWLWIFI_DEBUG
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2009-10-09 17:19:45 +08:00
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struct iwl_rx_packet *pkt = rxb_addr(rxb);
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2008-06-12 09:47:10 +08:00
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struct iwl_scanreq_notification *notif =
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(struct iwl_scanreq_notification *)pkt->u.raw;
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2009-01-28 06:27:56 +08:00
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IWL_DEBUG_RX(priv, "Scan request status = 0x%x\n", notif->status);
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2008-06-12 09:47:10 +08:00
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#endif
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}
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/* Service SCAN_START_NOTIFICATION (0x82) */
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static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
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struct iwl_rx_mem_buffer *rxb)
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{
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2009-10-09 17:19:45 +08:00
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struct iwl_rx_packet *pkt = rxb_addr(rxb);
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2008-06-12 09:47:10 +08:00
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struct iwl_scanstart_notification *notif =
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(struct iwl_scanstart_notification *)pkt->u.raw;
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priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
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2009-01-28 06:27:56 +08:00
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IWL_DEBUG_SCAN(priv, "Scan start: "
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2008-06-12 09:47:10 +08:00
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"%d [802.11%s] "
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"(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
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notif->channel,
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notif->band ? "bg" : "a",
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2008-07-11 11:53:39 +08:00
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le32_to_cpu(notif->tsf_high),
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le32_to_cpu(notif->tsf_low),
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notif->status, notif->beacon_timer);
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2008-06-12 09:47:10 +08:00
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}
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/* Service SCAN_RESULTS_NOTIFICATION (0x83) */
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static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
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struct iwl_rx_mem_buffer *rxb)
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{
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#ifdef CONFIG_IWLWIFI_DEBUG
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2009-10-09 17:19:45 +08:00
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struct iwl_rx_packet *pkt = rxb_addr(rxb);
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2008-06-12 09:47:10 +08:00
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struct iwl_scanresults_notification *notif =
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(struct iwl_scanresults_notification *)pkt->u.raw;
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2009-01-28 06:27:56 +08:00
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IWL_DEBUG_SCAN(priv, "Scan ch.res: "
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2008-06-12 09:47:10 +08:00
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"%d [802.11%s] "
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"(TSF: 0x%08X:%08X) - %d "
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"elapsed=%lu usec (%dms since last)\n",
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notif->channel,
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notif->band ? "bg" : "a",
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le32_to_cpu(notif->tsf_high),
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le32_to_cpu(notif->tsf_low),
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le32_to_cpu(notif->statistics[0]),
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le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
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jiffies_to_msecs(elapsed_jiffies
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(priv->last_scan_jiffies, jiffies)));
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#endif
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priv->last_scan_jiffies = jiffies;
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priv->next_scan_jiffies = 0;
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}
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/* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
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static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
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struct iwl_rx_mem_buffer *rxb)
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{
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2008-07-18 14:56:12 +08:00
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#ifdef CONFIG_IWLWIFI_DEBUG
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2009-10-09 17:19:45 +08:00
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struct iwl_rx_packet *pkt = rxb_addr(rxb);
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2008-06-12 09:47:10 +08:00
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struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
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2009-01-28 06:27:56 +08:00
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IWL_DEBUG_SCAN(priv, "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
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2008-06-12 09:47:10 +08:00
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scan_notif->scanned_channels,
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scan_notif->tsf_low,
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scan_notif->tsf_high, scan_notif->status);
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2008-07-18 14:56:12 +08:00
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#endif
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2008-06-12 09:47:10 +08:00
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/* The HW is no longer scanning */
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clear_bit(STATUS_SCAN_HW, &priv->status);
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2009-01-28 06:27:56 +08:00
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IWL_DEBUG_INFO(priv, "Scan pass on %sGHz took %dms\n",
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2008-06-28 16:19:40 +08:00
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(priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
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"2.4" : "5.2",
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2008-06-12 09:47:10 +08:00
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jiffies_to_msecs(elapsed_jiffies
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(priv->scan_pass_start, jiffies)));
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2008-06-28 16:19:40 +08:00
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/* Remove this scanned band from the list of pending
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* bands to scan, band G precedes A in order of scanning
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* as seen in iwl_bg_request_scan */
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if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
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priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
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else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ))
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priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
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2008-06-12 09:47:10 +08:00
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/* If a request to abort was given, or the scan did not succeed
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* then we reset the scan state machine and terminate,
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* re-queuing another scan if one has been requested */
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if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
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2009-01-28 06:27:56 +08:00
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IWL_DEBUG_INFO(priv, "Aborted scan completed.\n");
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2008-06-12 09:47:10 +08:00
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clear_bit(STATUS_SCAN_ABORTING, &priv->status);
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} else {
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/* If there are more bands on this scan pass reschedule */
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2008-06-28 16:19:40 +08:00
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if (priv->scan_bands)
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2008-06-12 09:47:10 +08:00
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goto reschedule;
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}
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priv->last_scan_jiffies = jiffies;
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priv->next_scan_jiffies = 0;
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2009-01-28 06:27:56 +08:00
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IWL_DEBUG_INFO(priv, "Setting scan to off\n");
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2008-06-12 09:47:10 +08:00
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clear_bit(STATUS_SCANNING, &priv->status);
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2009-01-28 06:27:56 +08:00
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IWL_DEBUG_INFO(priv, "Scan took %dms\n",
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2008-06-12 09:47:10 +08:00
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jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
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queue_work(priv->workqueue, &priv->scan_completed);
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return;
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reschedule:
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priv->scan_pass_start = jiffies;
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queue_work(priv->workqueue, &priv->request_scan);
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}
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void iwl_setup_rx_scan_handlers(struct iwl_priv *priv)
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{
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/* scan handlers */
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priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
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priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
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priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
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iwl_rx_scan_results_notif;
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priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
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iwl_rx_scan_complete_notif;
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}
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EXPORT_SYMBOL(iwl_setup_rx_scan_handlers);
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2009-01-24 05:45:12 +08:00
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inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
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enum ieee80211_band band,
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u8 n_probes)
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2008-06-12 09:47:10 +08:00
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{
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if (band == IEEE80211_BAND_5GHZ)
|
2008-07-11 11:53:39 +08:00
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return IWL_ACTIVE_DWELL_TIME_52 +
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IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
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2008-06-12 09:47:10 +08:00
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else
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2008-07-11 11:53:39 +08:00
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return IWL_ACTIVE_DWELL_TIME_24 +
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IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
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2008-06-12 09:47:10 +08:00
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|
|
}
|
2009-01-24 05:45:12 +08:00
|
|
|
EXPORT_SYMBOL(iwl_get_active_dwell_time);
|
2008-06-12 09:47:10 +08:00
|
|
|
|
2009-01-24 05:45:12 +08:00
|
|
|
u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
|
|
|
|
enum ieee80211_band band)
|
2008-06-12 09:47:10 +08:00
|
|
|
{
|
2008-07-11 11:53:39 +08:00
|
|
|
u16 passive = (band == IEEE80211_BAND_2GHZ) ?
|
2008-06-12 09:47:10 +08:00
|
|
|
IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
|
|
|
|
IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
|
|
|
|
|
|
|
|
if (iwl_is_associated(priv)) {
|
|
|
|
/* If we're associated, we clamp the maximum passive
|
|
|
|
* dwell time to be 98% of the beacon interval (minus
|
|
|
|
* 2 * channel tune time) */
|
|
|
|
passive = priv->beacon_int;
|
|
|
|
if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
|
|
|
|
passive = IWL_PASSIVE_DWELL_BASE;
|
|
|
|
passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
return passive;
|
|
|
|
}
|
2009-01-24 05:45:12 +08:00
|
|
|
EXPORT_SYMBOL(iwl_get_passive_dwell_time);
|
2008-06-12 09:47:10 +08:00
|
|
|
|
|
|
|
static int iwl_get_channels_for_scan(struct iwl_priv *priv,
|
|
|
|
enum ieee80211_band band,
|
2008-07-11 11:53:39 +08:00
|
|
|
u8 is_active, u8 n_probes,
|
2008-06-12 09:47:10 +08:00
|
|
|
struct iwl_scan_channel *scan_ch)
|
|
|
|
{
|
2009-06-20 04:52:44 +08:00
|
|
|
struct ieee80211_channel *chan;
|
2008-06-12 09:47:10 +08:00
|
|
|
const struct ieee80211_supported_band *sband;
|
|
|
|
const struct iwl_channel_info *ch_info;
|
|
|
|
u16 passive_dwell = 0;
|
|
|
|
u16 active_dwell = 0;
|
|
|
|
int added, i;
|
2008-07-11 11:53:38 +08:00
|
|
|
u16 channel;
|
2008-06-12 09:47:10 +08:00
|
|
|
|
|
|
|
sband = iwl_get_hw_mode(priv, band);
|
|
|
|
if (!sband)
|
|
|
|
return 0;
|
|
|
|
|
2008-07-11 11:53:39 +08:00
|
|
|
active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
|
2008-06-12 09:47:10 +08:00
|
|
|
passive_dwell = iwl_get_passive_dwell_time(priv, band);
|
|
|
|
|
2008-07-11 11:53:39 +08:00
|
|
|
if (passive_dwell <= active_dwell)
|
|
|
|
passive_dwell = active_dwell + 1;
|
|
|
|
|
2009-06-20 04:52:44 +08:00
|
|
|
for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
|
|
|
|
chan = priv->scan_request->channels[i];
|
|
|
|
|
|
|
|
if (chan->band != band)
|
2008-06-12 09:47:10 +08:00
|
|
|
continue;
|
|
|
|
|
2009-06-20 04:52:44 +08:00
|
|
|
channel = ieee80211_frequency_to_channel(chan->center_freq);
|
2008-07-11 11:53:38 +08:00
|
|
|
scan_ch->channel = cpu_to_le16(channel);
|
2008-06-12 09:47:10 +08:00
|
|
|
|
2008-07-11 11:53:38 +08:00
|
|
|
ch_info = iwl_get_channel_info(priv, band, channel);
|
2008-06-12 09:47:10 +08:00
|
|
|
if (!is_channel_valid(ch_info)) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
|
2008-07-11 11:53:38 +08:00
|
|
|
channel);
|
2008-06-12 09:47:10 +08:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!is_active || is_channel_passive(ch_info) ||
|
2009-06-20 04:52:44 +08:00
|
|
|
(chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
|
2008-07-11 11:53:38 +08:00
|
|
|
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
|
2008-06-12 09:47:10 +08:00
|
|
|
else
|
2008-07-11 11:53:38 +08:00
|
|
|
scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
|
2008-06-12 09:47:10 +08:00
|
|
|
|
2008-09-03 11:18:43 +08:00
|
|
|
if (n_probes)
|
2008-07-11 11:53:39 +08:00
|
|
|
scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
|
2008-06-12 09:47:10 +08:00
|
|
|
|
|
|
|
scan_ch->active_dwell = cpu_to_le16(active_dwell);
|
|
|
|
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
|
|
|
|
|
|
|
|
/* Set txpower levels to defaults */
|
2008-06-12 09:47:12 +08:00
|
|
|
scan_ch->dsp_atten = 110;
|
2008-06-12 09:47:10 +08:00
|
|
|
|
2008-07-11 11:53:39 +08:00
|
|
|
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
|
|
|
|
* power level:
|
|
|
|
* scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
|
|
|
|
*/
|
2008-06-12 09:47:10 +08:00
|
|
|
if (band == IEEE80211_BAND_5GHZ)
|
2008-06-12 09:47:12 +08:00
|
|
|
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
|
2008-07-11 11:53:39 +08:00
|
|
|
else
|
2008-06-12 09:47:12 +08:00
|
|
|
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
|
2008-06-12 09:47:10 +08:00
|
|
|
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
|
2008-07-11 11:53:39 +08:00
|
|
|
channel, le32_to_cpu(scan_ch->type),
|
2008-07-11 11:53:38 +08:00
|
|
|
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
|
|
|
|
"ACTIVE" : "PASSIVE",
|
|
|
|
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
|
2008-06-12 09:47:10 +08:00
|
|
|
active_dwell : passive_dwell);
|
|
|
|
|
|
|
|
scan_ch++;
|
|
|
|
added++;
|
|
|
|
}
|
|
|
|
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
|
2008-06-12 09:47:10 +08:00
|
|
|
return added;
|
|
|
|
}
|
|
|
|
|
2008-06-12 09:47:12 +08:00
|
|
|
void iwl_init_scan_params(struct iwl_priv *priv)
|
|
|
|
{
|
2008-10-15 03:32:45 +08:00
|
|
|
u8 ant_idx = fls(priv->hw_params.valid_tx_ant) - 1;
|
2008-06-12 09:47:12 +08:00
|
|
|
if (!priv->scan_tx_ant[IEEE80211_BAND_5GHZ])
|
2008-10-15 03:32:45 +08:00
|
|
|
priv->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
|
2008-06-12 09:47:12 +08:00
|
|
|
if (!priv->scan_tx_ant[IEEE80211_BAND_2GHZ])
|
2008-10-15 03:32:45 +08:00
|
|
|
priv->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;
|
2008-06-12 09:47:12 +08:00
|
|
|
}
|
2009-10-31 05:36:11 +08:00
|
|
|
EXPORT_SYMBOL(iwl_init_scan_params);
|
2008-06-12 09:47:12 +08:00
|
|
|
|
2009-06-20 04:52:44 +08:00
|
|
|
static int iwl_scan_initiate(struct iwl_priv *priv)
|
2008-06-12 09:47:10 +08:00
|
|
|
{
|
|
|
|
if (!iwl_is_ready_rf(priv)) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "Aborting scan due to not ready.\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (test_bit(STATUS_SCANNING, &priv->status)) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "Scan already in progress.\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
return -EAGAIN;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
return -EAGAIN;
|
|
|
|
}
|
|
|
|
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_INFO(priv, "Starting scan...\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
set_bit(STATUS_SCANNING, &priv->status);
|
|
|
|
priv->scan_start = jiffies;
|
|
|
|
priv->scan_pass_start = priv->scan_start;
|
|
|
|
|
|
|
|
queue_work(priv->workqueue, &priv->request_scan);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-02-19 07:54:27 +08:00
|
|
|
#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;
|
2009-06-20 04:52:44 +08:00
|
|
|
int ret, i;
|
2009-02-19 07:54:27 +08:00
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2009-06-20 04:52:44 +08:00
|
|
|
priv->scan_bands = 0;
|
|
|
|
for (i = 0; i < req->n_channels; i++)
|
|
|
|
priv->scan_bands |= BIT(req->channels[i]->band);
|
|
|
|
|
2009-04-21 05:36:56 +08:00
|
|
|
priv->scan_request = req;
|
2009-02-19 07:54:27 +08:00
|
|
|
|
|
|
|
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);
|
|
|
|
|
2008-06-12 09:47:10 +08:00
|
|
|
#define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
|
|
|
|
|
2009-01-24 05:45:12 +08:00
|
|
|
void iwl_bg_scan_check(struct work_struct *data)
|
2008-06-12 09:47:10 +08:00
|
|
|
{
|
|
|
|
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)) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "Scan completion watchdog resetting "
|
2008-06-12 09:47:10 +08:00
|
|
|
"adapter (%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);
|
|
|
|
}
|
2009-01-24 05:45:12 +08:00
|
|
|
EXPORT_SYMBOL(iwl_bg_scan_check);
|
|
|
|
|
2008-06-12 09:47:10 +08:00
|
|
|
/**
|
|
|
|
* iwl_fill_probe_req - fill in all required fields and IE for probe request
|
|
|
|
*/
|
2008-06-12 09:47:12 +08:00
|
|
|
|
2009-04-21 05:36:56 +08:00
|
|
|
u16 iwl_fill_probe_req(struct iwl_priv *priv, struct ieee80211_mgmt *frame,
|
|
|
|
const u8 *ies, int ie_len, int left)
|
2008-06-12 09:47:10 +08:00
|
|
|
{
|
|
|
|
int len = 0;
|
|
|
|
u8 *pos = NULL;
|
2008-06-12 09:47:12 +08:00
|
|
|
|
2008-06-12 09:47:10 +08:00
|
|
|
/* Make sure there is enough space for the probe request,
|
|
|
|
* two mandatory IEs and the data */
|
|
|
|
left -= 24;
|
|
|
|
if (left < 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
|
|
|
|
memcpy(frame->da, iwl_bcast_addr, ETH_ALEN);
|
|
|
|
memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
|
|
|
|
memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN);
|
|
|
|
frame->seq_ctrl = 0;
|
|
|
|
|
2008-06-12 09:47:12 +08:00
|
|
|
len += 24;
|
|
|
|
|
2008-06-12 09:47:10 +08:00
|
|
|
/* ...next IE... */
|
2008-06-12 09:47:12 +08:00
|
|
|
pos = &frame->u.probe_req.variable[0];
|
2008-06-12 09:47:10 +08:00
|
|
|
|
2008-06-12 09:47:12 +08:00
|
|
|
/* fill in our indirect SSID IE */
|
2008-06-12 09:47:10 +08:00
|
|
|
left -= 2;
|
|
|
|
if (left < 0)
|
|
|
|
return 0;
|
|
|
|
*pos++ = WLAN_EID_SSID;
|
|
|
|
*pos++ = 0;
|
|
|
|
|
2008-06-12 09:47:12 +08:00
|
|
|
len += 2;
|
2008-06-12 09:47:10 +08:00
|
|
|
|
2009-04-21 05:36:56 +08:00
|
|
|
if (WARN_ON(left < ie_len))
|
|
|
|
return len;
|
2008-06-12 09:47:10 +08:00
|
|
|
|
2009-04-21 05:36:56 +08:00
|
|
|
memcpy(pos, ies, ie_len);
|
|
|
|
len += ie_len;
|
|
|
|
left -= ie_len;
|
2008-06-12 09:47:12 +08:00
|
|
|
|
2008-06-12 09:47:10 +08:00
|
|
|
return (u16)len;
|
|
|
|
}
|
2009-01-24 05:45:12 +08:00
|
|
|
EXPORT_SYMBOL(iwl_fill_probe_req);
|
2008-06-12 09:47:10 +08:00
|
|
|
|
|
|
|
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),
|
2009-07-25 02:13:05 +08:00
|
|
|
.flags = CMD_SIZE_HUGE,
|
2008-06-12 09:47:10 +08:00
|
|
|
};
|
|
|
|
struct iwl_scan_cmd *scan;
|
|
|
|
struct ieee80211_conf *conf = NULL;
|
2008-06-12 09:47:12 +08:00
|
|
|
int ret = 0;
|
2008-10-15 03:32:45 +08:00
|
|
|
u32 rate_flags = 0;
|
2008-06-12 09:47:10 +08:00
|
|
|
u16 cmd_len;
|
2009-05-09 04:44:42 +08:00
|
|
|
u16 rx_chain = 0;
|
2008-06-12 09:47:10 +08:00
|
|
|
enum ieee80211_band band;
|
2009-04-21 05:36:56 +08:00
|
|
|
u8 n_probes = 0;
|
2009-05-09 04:44:42 +08:00
|
|
|
u8 rx_ant = priv->hw_params.valid_rx_ant;
|
2008-10-15 03:32:45 +08:00
|
|
|
u8 rate;
|
2009-04-21 05:36:56 +08:00
|
|
|
bool is_active = false;
|
2009-05-23 02:01:49 +08:00
|
|
|
int chan_mod;
|
2009-11-07 06:52:47 +08:00
|
|
|
u8 active_chains;
|
2008-06-12 09:47:10 +08:00
|
|
|
|
|
|
|
conf = ieee80211_get_hw_conf(priv->hw);
|
|
|
|
|
|
|
|
mutex_lock(&priv->mutex);
|
|
|
|
|
2009-05-16 07:13:46 +08:00
|
|
|
cancel_delayed_work(&priv->scan_check);
|
|
|
|
|
2008-06-12 09:47:10 +08:00
|
|
|
if (!iwl_is_ready(priv)) {
|
2008-12-19 10:37:32 +08:00
|
|
|
IWL_WARN(priv, "request scan called when driver not ready.\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
2008-10-24 14:48:56 +08:00
|
|
|
/* Make sure the scan wasn't canceled before this queued work
|
2008-06-12 09:47:10 +08:00
|
|
|
* 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)) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests in parallel. "
|
2008-06-12 09:47:10 +08:00
|
|
|
"Ignoring second request.\n");
|
|
|
|
ret = -EIO;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_HC(priv, "Scan request while abort pending. Queuing.\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (iwl_is_rfkill(priv)) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!test_bit(STATUS_READY, &priv->status)) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_HC(priv, "Scan request while uninitialized. Queuing.\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!priv->scan_bands) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
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;
|
|
|
|
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
|
|
|
|
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);
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
|
2008-06-12 09:47:10 +08:00
|
|
|
scan_suspend_time, interval);
|
|
|
|
}
|
|
|
|
|
2009-04-21 05:36:56 +08:00
|
|
|
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");
|
2008-06-12 09:47:10 +08:00
|
|
|
|
|
|
|
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;
|
|
|
|
|
|
|
|
|
2008-06-28 16:19:40 +08:00
|
|
|
if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
|
2008-06-12 09:47:12 +08:00
|
|
|
band = IEEE80211_BAND_2GHZ;
|
2008-06-12 09:47:10 +08:00
|
|
|
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
|
2009-05-23 02:01:49 +08:00
|
|
|
chan_mod = le32_to_cpu(priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_MSK)
|
|
|
|
>> RXON_FLG_CHANNEL_MODE_POS;
|
|
|
|
if (chan_mod == CHANNEL_MODE_PURE_40) {
|
2008-10-15 03:32:45 +08:00
|
|
|
rate = IWL_RATE_6M_PLCP;
|
|
|
|
} else {
|
|
|
|
rate = IWL_RATE_1M_PLCP;
|
|
|
|
rate_flags = RATE_MCS_CCK_MSK;
|
|
|
|
}
|
2008-06-12 09:47:10 +08:00
|
|
|
scan->good_CRC_th = 0;
|
2008-06-28 16:19:40 +08:00
|
|
|
} else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
|
2008-06-12 09:47:12 +08:00
|
|
|
band = IEEE80211_BAND_5GHZ;
|
2008-10-15 03:32:45 +08:00
|
|
|
rate = IWL_RATE_6M_PLCP;
|
2009-04-21 05:36:57 +08:00
|
|
|
/*
|
|
|
|
* If active scaning is requested but a certain channel
|
|
|
|
* is marked passive, we can do active scanning if we
|
|
|
|
* detect transmissions.
|
|
|
|
*/
|
|
|
|
scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
|
2008-06-12 09:47:10 +08:00
|
|
|
|
2008-06-12 09:47:12 +08:00
|
|
|
/* 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.
|
2008-10-06 16:05:30 +08:00
|
|
|
*/
|
2008-06-12 09:47:12 +08:00
|
|
|
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
|
2009-05-09 04:44:42 +08:00
|
|
|
rx_ant = ANT_BC;
|
2008-06-28 16:19:40 +08:00
|
|
|
} else {
|
2008-12-19 10:37:32 +08:00
|
|
|
IWL_WARN(priv, "Invalid scan band count\n");
|
2008-06-12 09:47:10 +08:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
2008-10-15 03:32:45 +08:00
|
|
|
priv->scan_tx_ant[band] =
|
|
|
|
iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band]);
|
|
|
|
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);
|
|
|
|
|
2009-11-07 06:52:47 +08:00
|
|
|
/* In power save mode use one chain, otherwise use all chains */
|
|
|
|
if (test_bit(STATUS_POWER_PMI, &priv->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);
|
|
|
|
}
|
2008-10-06 16:05:30 +08:00
|
|
|
/* MIMO is not used here, but value is required */
|
2009-05-09 04:44:42 +08:00
|
|
|
rx_chain |= ANT_ABC << RXON_RX_CHAIN_VALID_POS;
|
2009-11-07 06:52:47 +08:00
|
|
|
rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
|
2009-05-09 04:44:42 +08:00
|
|
|
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);
|
2009-04-21 05:36:56 +08:00
|
|
|
cmd_len = iwl_fill_probe_req(priv,
|
|
|
|
(struct ieee80211_mgmt *)scan->data,
|
|
|
|
priv->scan_request->ie,
|
|
|
|
priv->scan_request->ie_len,
|
|
|
|
IWL_MAX_SCAN_SIZE - sizeof(*scan));
|
2008-06-12 09:47:10 +08:00
|
|
|
|
|
|
|
scan->tx_cmd.len = cpu_to_le16(cmd_len);
|
|
|
|
|
2009-04-21 05:37:00 +08:00
|
|
|
if (iwl_is_monitor_mode(priv))
|
2008-06-12 09:47:10 +08:00
|
|
|
scan->filter_flags = RXON_FILTER_PROMISC_MSK;
|
|
|
|
|
2008-06-12 09:47:12 +08:00
|
|
|
scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
|
|
|
|
RXON_FILTER_BCON_AWARE_MSK);
|
|
|
|
|
2008-07-11 11:53:39 +08:00
|
|
|
scan->channel_count =
|
2009-04-21 05:36:56 +08:00
|
|
|
iwl_get_channels_for_scan(priv, band, is_active, n_probes,
|
2008-07-11 11:53:39 +08:00
|
|
|
(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
|
|
|
|
|
2008-06-12 09:47:12 +08:00
|
|
|
if (scan->channel_count == 0) {
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
|
2008-06-12 09:47:12 +08:00
|
|
|
goto done;
|
|
|
|
}
|
2008-06-12 09:47:10 +08:00
|
|
|
|
|
|
|
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:
|
2008-10-24 14:48:54 +08:00
|
|
|
/* Cannot perform scan. Make sure we clear scanning
|
|
|
|
* bits from status so next scan request can be performed.
|
|
|
|
* If we don't clear scanning status bit here all next scan
|
|
|
|
* will fail
|
|
|
|
*/
|
|
|
|
clear_bit(STATUS_SCAN_HW, &priv->status);
|
|
|
|
clear_bit(STATUS_SCANNING, &priv->status);
|
2008-06-12 09:47:10 +08:00
|
|
|
/* inform mac80211 scan aborted */
|
|
|
|
queue_work(priv->workqueue, &priv->scan_completed);
|
|
|
|
mutex_unlock(&priv->mutex);
|
|
|
|
}
|
|
|
|
|
2009-01-24 05:45:12 +08:00
|
|
|
void iwl_bg_abort_scan(struct work_struct *work)
|
2008-06-12 09:47:10 +08:00
|
|
|
{
|
|
|
|
struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
|
|
|
|
|
2009-08-22 04:34:25 +08:00
|
|
|
if (!test_bit(STATUS_READY, &priv->status) ||
|
|
|
|
!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
|
2008-06-12 09:47:10 +08:00
|
|
|
return;
|
|
|
|
|
|
|
|
mutex_lock(&priv->mutex);
|
|
|
|
|
|
|
|
set_bit(STATUS_SCAN_ABORTING, &priv->status);
|
|
|
|
iwl_send_scan_abort(priv);
|
|
|
|
|
|
|
|
mutex_unlock(&priv->mutex);
|
|
|
|
}
|
2009-01-24 05:45:12 +08:00
|
|
|
EXPORT_SYMBOL(iwl_bg_abort_scan);
|
2008-06-12 09:47:10 +08:00
|
|
|
|
2009-01-24 05:45:12 +08:00
|
|
|
void iwl_bg_scan_completed(struct work_struct *work)
|
2008-10-06 16:05:32 +08:00
|
|
|
{
|
|
|
|
struct iwl_priv *priv =
|
|
|
|
container_of(work, struct iwl_priv, scan_completed);
|
|
|
|
|
2009-01-28 06:27:56 +08:00
|
|
|
IWL_DEBUG_SCAN(priv, "SCAN complete scan\n");
|
2008-10-06 16:05:32 +08:00
|
|
|
|
2009-05-16 07:13:46 +08:00
|
|
|
cancel_delayed_work(&priv->scan_check);
|
|
|
|
|
2009-04-23 16:45:04 +08:00
|
|
|
ieee80211_scan_completed(priv->hw, false);
|
|
|
|
|
2008-10-06 16:05:32 +08:00
|
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* Since setting the TXPOWER may have been deferred while
|
|
|
|
* performing the scan, fire one off */
|
|
|
|
mutex_lock(&priv->mutex);
|
|
|
|
iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
|
|
|
|
mutex_unlock(&priv->mutex);
|
|
|
|
}
|
2009-01-24 05:45:12 +08:00
|
|
|
EXPORT_SYMBOL(iwl_bg_scan_completed);
|
2008-10-06 16:05:32 +08:00
|
|
|
|
2008-06-12 09:47:10 +08:00
|
|
|
void iwl_setup_scan_deferred_work(struct iwl_priv *priv)
|
|
|
|
{
|
2008-10-06 16:05:32 +08:00
|
|
|
INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
|
2008-06-12 09:47:10 +08:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(iwl_setup_scan_deferred_work);
|
|
|
|
|