From a6d4eae80157830af9c9d80de2daf6611696a34e Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 29 May 2008 14:38:28 -0400 Subject: ipw2200: expire and use oldest BSS on adhoc create If there are no networks on the free list, expire the oldest one when creating a new adhoc network. Because ipw2200 and the ieee80211 stack don't actually cull old networks and place them back on the free list unless they are needed for new probe responses, over time the free list would become empty and creating an adhoc network would fail due to the ! list_empty(...) check. Signed-off-by: Dan Williams Signed-off-by: John W. Linville --- drivers/net/wireless/ipw2200.c | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) (limited to 'drivers/net/wireless/ipw2200.c') diff --git a/drivers/net/wireless/ipw2200.c b/drivers/net/wireless/ipw2200.c index d74c061994ae..729336774828 100644 --- a/drivers/net/wireless/ipw2200.c +++ b/drivers/net/wireless/ipw2200.c @@ -7558,8 +7558,31 @@ static int ipw_associate(void *data) priv->ieee->iw_mode == IW_MODE_ADHOC && priv->config & CFG_ADHOC_CREATE && priv->config & CFG_STATIC_ESSID && - priv->config & CFG_STATIC_CHANNEL && - !list_empty(&priv->ieee->network_free_list)) { + priv->config & CFG_STATIC_CHANNEL) { + /* Use oldest network if the free list is empty */ + if (list_empty(&priv->ieee->network_free_list)) { + struct ieee80211_network *oldest = NULL; + struct ieee80211_network *target; + DECLARE_MAC_BUF(mac); + + list_for_each_entry(target, &priv->ieee->network_list, list) { + if ((oldest == NULL) || + (target->last_scanned < oldest->last_scanned)) + oldest = target; + } + + /* If there are no more slots, expire the oldest */ + list_del(&oldest->list); + target = oldest; + IPW_DEBUG_ASSOC("Expired '%s' (%s) from " + "network list.\n", + escape_essid(target->ssid, + target->ssid_len), + print_mac(mac, target->bssid)); + list_add_tail(&target->list, + &priv->ieee->network_free_list); + } + element = priv->ieee->network_free_list.next; network = list_entry(element, struct ieee80211_network, list); ipw_adhoc_create(priv, network); -- cgit v1.2.3 From ea177305b321a4127e448b88de20d5792682ace1 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Mon, 2 Jun 2008 17:51:23 -0400 Subject: ipw2200: queue direct scans When another scan is in progress, a direct scan gets dropped on the floor. However, that direct scan is usually the scan that's really needed by userspace, and gets stomped on by all the broadcast scans the ipw2200 driver issues internally. Make sure the direct scan happens eventually, and as a bonus ensure that the passive scan worker is cleaned up when appropriate. The change of request_passive_scan form a struct work to struct delayed_work is only to make the set_wx_scan() code a bit simpler, it's still only used with a delay of 0 to match previous behavior. Signed-off-by: Dan Williams Signed-off-by: John W. Linville --- drivers/net/wireless/ipw2200.c | 176 +++++++++++++++++++---------------------- 1 file changed, 82 insertions(+), 94 deletions(-) (limited to 'drivers/net/wireless/ipw2200.c') diff --git a/drivers/net/wireless/ipw2200.c b/drivers/net/wireless/ipw2200.c index 729336774828..6e704608947c 100644 --- a/drivers/net/wireless/ipw2200.c +++ b/drivers/net/wireless/ipw2200.c @@ -1753,6 +1753,8 @@ static int ipw_radio_kill_sw(struct ipw_priv *priv, int disable_radio) if (priv->workqueue) { cancel_delayed_work(&priv->request_scan); + cancel_delayed_work(&priv->request_direct_scan); + cancel_delayed_work(&priv->request_passive_scan); cancel_delayed_work(&priv->scan_event); } queue_work(priv->workqueue, &priv->down); @@ -2005,6 +2007,8 @@ static void ipw_irq_tasklet(struct ipw_priv *priv) wake_up_interruptible(&priv->wait_command_queue); priv->status &= ~(STATUS_ASSOCIATED | STATUS_ASSOCIATING); cancel_delayed_work(&priv->request_scan); + cancel_delayed_work(&priv->request_direct_scan); + cancel_delayed_work(&priv->request_passive_scan); cancel_delayed_work(&priv->scan_event); schedule_work(&priv->link_down); queue_delayed_work(priv->workqueue, &priv->rf_kill, 2 * HZ); @@ -4712,6 +4716,12 @@ static void ipw_rx_notification(struct ipw_priv *priv, priv->status &= ~STATUS_SCAN_FORCED; #endif /* CONFIG_IPW2200_MONITOR */ + /* Do queued direct scans first */ + if (priv->status & STATUS_DIRECT_SCAN_PENDING) { + queue_delayed_work(priv->workqueue, + &priv->request_direct_scan, 0); + } + if (!(priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING | STATUS_ROAMING | @@ -6267,7 +6277,7 @@ static void ipw_add_scan_channels(struct ipw_priv *priv, } } -static int ipw_request_scan_helper(struct ipw_priv *priv, int type) +static int ipw_request_scan_helper(struct ipw_priv *priv, int type, int direct) { struct ipw_scan_request_ext scan; int err = 0, scan_type; @@ -6278,22 +6288,31 @@ static int ipw_request_scan_helper(struct ipw_priv *priv, int type) mutex_lock(&priv->mutex); + if (direct && (priv->direct_scan_ssid_len == 0)) { + IPW_DEBUG_HC("Direct scan requested but no SSID to scan for\n"); + priv->status &= ~STATUS_DIRECT_SCAN_PENDING; + goto done; + } + if (priv->status & STATUS_SCANNING) { - IPW_DEBUG_HC("Concurrent scan requested. Ignoring.\n"); - priv->status |= STATUS_SCAN_PENDING; + IPW_DEBUG_HC("Concurrent scan requested. Queuing.\n"); + priv->status |= direct ? STATUS_DIRECT_SCAN_PENDING : + STATUS_SCAN_PENDING; goto done; } if (!(priv->status & STATUS_SCAN_FORCED) && priv->status & STATUS_SCAN_ABORTING) { IPW_DEBUG_HC("Scan request while abort pending. Queuing.\n"); - priv->status |= STATUS_SCAN_PENDING; + priv->status |= direct ? STATUS_DIRECT_SCAN_PENDING : + STATUS_SCAN_PENDING; goto done; } if (priv->status & STATUS_RF_KILL_MASK) { - IPW_DEBUG_HC("Aborting scan due to RF Kill activation\n"); - priv->status |= STATUS_SCAN_PENDING; + IPW_DEBUG_HC("Queuing scan due to RF Kill activation\n"); + priv->status |= direct ? STATUS_DIRECT_SCAN_PENDING : + STATUS_SCAN_PENDING; goto done; } @@ -6321,6 +6340,7 @@ static int ipw_request_scan_helper(struct ipw_priv *priv, int type) cpu_to_le16(20); scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] = cpu_to_le16(120); + scan.dwell_time[IPW_SCAN_ACTIVE_DIRECT_SCAN] = cpu_to_le16(20); #ifdef CONFIG_IPW2200_MONITOR if (priv->ieee->iw_mode == IW_MODE_MONITOR) { @@ -6360,13 +6380,23 @@ static int ipw_request_scan_helper(struct ipw_priv *priv, int type) cpu_to_le16(2000); } else { #endif /* CONFIG_IPW2200_MONITOR */ - /* If we are roaming, then make this a directed scan for the - * current network. Otherwise, ensure that every other scan - * is a fast channel hop scan */ - if ((priv->status & STATUS_ROAMING) - || (!(priv->status & STATUS_ASSOCIATED) - && (priv->config & CFG_STATIC_ESSID) - && (le32_to_cpu(scan.full_scan_index) % 2))) { + /* Honor direct scans first, otherwise if we are roaming make + * this a direct scan for the current network. Finally, + * ensure that every other scan is a fast channel hop scan */ + if (direct) { + err = ipw_send_ssid(priv, priv->direct_scan_ssid, + priv->direct_scan_ssid_len); + if (err) { + IPW_DEBUG_HC("Attempt to send SSID command " + "failed\n"); + goto done; + } + + scan_type = IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN; + } else if ((priv->status & STATUS_ROAMING) + || (!(priv->status & STATUS_ASSOCIATED) + && (priv->config & CFG_STATIC_ESSID) + && (le32_to_cpu(scan.full_scan_index) % 2))) { err = ipw_send_ssid(priv, priv->essid, priv->essid_len); if (err) { IPW_DEBUG_HC("Attempt to send SSID command " @@ -6391,7 +6421,12 @@ send_request: } priv->status |= STATUS_SCANNING; - priv->status &= ~STATUS_SCAN_PENDING; + if (direct) { + priv->status &= ~STATUS_DIRECT_SCAN_PENDING; + priv->direct_scan_ssid_len = 0; + } else + priv->status &= ~STATUS_SCAN_PENDING; + queue_delayed_work(priv->workqueue, &priv->scan_check, IPW_SCAN_CHECK_WATCHDOG); done: @@ -6402,15 +6437,22 @@ done: static void ipw_request_passive_scan(struct work_struct *work) { struct ipw_priv *priv = - container_of(work, struct ipw_priv, request_passive_scan); - ipw_request_scan_helper(priv, IW_SCAN_TYPE_PASSIVE); + container_of(work, struct ipw_priv, request_passive_scan.work); + ipw_request_scan_helper(priv, IW_SCAN_TYPE_PASSIVE, 0); } static void ipw_request_scan(struct work_struct *work) { struct ipw_priv *priv = container_of(work, struct ipw_priv, request_scan.work); - ipw_request_scan_helper(priv, IW_SCAN_TYPE_ACTIVE); + ipw_request_scan_helper(priv, IW_SCAN_TYPE_ACTIVE, 0); +} + +static void ipw_request_direct_scan(struct work_struct *work) +{ + struct ipw_priv *priv = + container_of(work, struct ipw_priv, request_direct_scan.work); + ipw_request_scan_helper(priv, IW_SCAN_TYPE_ACTIVE, 1); } static void ipw_bg_abort_scan(struct work_struct *work) @@ -9477,99 +9519,38 @@ static int ipw_wx_get_retry(struct net_device *dev, return 0; } -static int ipw_request_direct_scan(struct ipw_priv *priv, char *essid, - int essid_len) -{ - struct ipw_scan_request_ext scan; - int err = 0, scan_type; - - if (!(priv->status & STATUS_INIT) || - (priv->status & STATUS_EXIT_PENDING)) - return 0; - - mutex_lock(&priv->mutex); - - if (priv->status & STATUS_RF_KILL_MASK) { - IPW_DEBUG_HC("Aborting scan due to RF kill activation\n"); - priv->status |= STATUS_SCAN_PENDING; - goto done; - } - - IPW_DEBUG_HC("starting request direct scan!\n"); - - if (priv->status & (STATUS_SCANNING | STATUS_SCAN_ABORTING)) { - /* We should not sleep here; otherwise we will block most - * of the system (for instance, we hold rtnl_lock when we - * get here). - */ - err = -EAGAIN; - goto done; - } - memset(&scan, 0, sizeof(scan)); - - if (priv->config & CFG_SPEED_SCAN) - scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_SCAN] = - cpu_to_le16(30); - else - scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_SCAN] = - cpu_to_le16(20); - - scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN] = - cpu_to_le16(20); - scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] = cpu_to_le16(120); - scan.dwell_time[IPW_SCAN_ACTIVE_DIRECT_SCAN] = cpu_to_le16(20); - - scan.full_scan_index = cpu_to_le32(ieee80211_get_scans(priv->ieee)); - - err = ipw_send_ssid(priv, essid, essid_len); - if (err) { - IPW_DEBUG_HC("Attempt to send SSID command failed\n"); - goto done; - } - scan_type = IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN; - - ipw_add_scan_channels(priv, &scan, scan_type); - - err = ipw_send_scan_request_ext(priv, &scan); - if (err) { - IPW_DEBUG_HC("Sending scan command failed: %08X\n", err); - goto done; - } - - priv->status |= STATUS_SCANNING; - - done: - mutex_unlock(&priv->mutex); - return err; -} - static int ipw_wx_set_scan(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { struct ipw_priv *priv = ieee80211_priv(dev); struct iw_scan_req *req = (struct iw_scan_req *)extra; + struct delayed_work *work = NULL; mutex_lock(&priv->mutex); + priv->user_requested_scan = 1; - mutex_unlock(&priv->mutex); if (wrqu->data.length == sizeof(struct iw_scan_req)) { if (wrqu->data.flags & IW_SCAN_THIS_ESSID) { - ipw_request_direct_scan(priv, req->essid, - req->essid_len); - return 0; - } - if (req->scan_type == IW_SCAN_TYPE_PASSIVE) { - queue_work(priv->workqueue, - &priv->request_passive_scan); - return 0; + int len = min((int)req->essid_len, + (int)sizeof(priv->direct_scan_ssid)); + memcpy(priv->direct_scan_ssid, req->essid, len); + priv->direct_scan_ssid_len = len; + work = &priv->request_direct_scan; + } else if (req->scan_type == IW_SCAN_TYPE_PASSIVE) { + work = &priv->request_passive_scan; } + } else { + /* Normal active broadcast scan */ + work = &priv->request_scan; } + mutex_unlock(&priv->mutex); + IPW_DEBUG_WX("Start scan\n"); - queue_delayed_work(priv->workqueue, &priv->request_scan, 0); + queue_delayed_work(priv->workqueue, work, 0); return 0; } @@ -10731,6 +10712,8 @@ static void ipw_link_up(struct ipw_priv *priv) } cancel_delayed_work(&priv->request_scan); + cancel_delayed_work(&priv->request_direct_scan); + cancel_delayed_work(&priv->request_passive_scan); cancel_delayed_work(&priv->scan_event); ipw_reset_stats(priv); /* Ensure the rate is updated immediately */ @@ -10761,6 +10744,8 @@ static void ipw_link_down(struct ipw_priv *priv) /* Cancel any queued work ... */ cancel_delayed_work(&priv->request_scan); + cancel_delayed_work(&priv->request_direct_scan); + cancel_delayed_work(&priv->request_passive_scan); cancel_delayed_work(&priv->adhoc_check); cancel_delayed_work(&priv->gather_stats); @@ -10800,8 +10785,9 @@ static int __devinit ipw_setup_deferred_work(struct ipw_priv *priv) INIT_WORK(&priv->up, ipw_bg_up); INIT_WORK(&priv->down, ipw_bg_down); INIT_DELAYED_WORK(&priv->request_scan, ipw_request_scan); + INIT_DELAYED_WORK(&priv->request_direct_scan, ipw_request_direct_scan); + INIT_DELAYED_WORK(&priv->request_passive_scan, ipw_request_passive_scan); INIT_DELAYED_WORK(&priv->scan_event, ipw_scan_event); - INIT_WORK(&priv->request_passive_scan, ipw_request_passive_scan); INIT_DELAYED_WORK(&priv->gather_stats, ipw_bg_gather_stats); INIT_WORK(&priv->abort_scan, ipw_bg_abort_scan); INIT_WORK(&priv->roam, ipw_bg_roam); @@ -11835,6 +11821,8 @@ static void __devexit ipw_pci_remove(struct pci_dev *pdev) cancel_delayed_work(&priv->adhoc_check); cancel_delayed_work(&priv->gather_stats); cancel_delayed_work(&priv->request_scan); + cancel_delayed_work(&priv->request_direct_scan); + cancel_delayed_work(&priv->request_passive_scan); cancel_delayed_work(&priv->scan_event); cancel_delayed_work(&priv->rf_kill); cancel_delayed_work(&priv->scan_check); -- cgit v1.2.3