| /* |
| * Copyright 2002-2005, Instant802 Networks, Inc. |
| * Copyright 2005-2006, Devicescape Software, Inc. |
| * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <net/mac80211.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/netdevice.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <linux/skbuff.h> |
| #include <linux/etherdevice.h> |
| #include <linux/if_arp.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/bitmap.h> |
| #include <linux/pm_qos_params.h> |
| #include <linux/inetdevice.h> |
| #include <net/net_namespace.h> |
| #include <net/cfg80211.h> |
| |
| #include "ieee80211_i.h" |
| #include "driver-ops.h" |
| #include "rate.h" |
| #include "mesh.h" |
| #include "wep.h" |
| #include "led.h" |
| #include "cfg.h" |
| #include "debugfs.h" |
| |
| |
| bool ieee80211_disable_40mhz_24ghz; |
| module_param(ieee80211_disable_40mhz_24ghz, bool, 0644); |
| MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz, |
| "Disable 40MHz support in the 2.4GHz band"); |
| |
| void ieee80211_configure_filter(struct ieee80211_local *local) |
| { |
| u64 mc; |
| unsigned int changed_flags; |
| unsigned int new_flags = 0; |
| |
| if (atomic_read(&local->iff_promiscs)) |
| new_flags |= FIF_PROMISC_IN_BSS; |
| |
| if (atomic_read(&local->iff_allmultis)) |
| new_flags |= FIF_ALLMULTI; |
| |
| if (local->monitors || local->scanning) |
| new_flags |= FIF_BCN_PRBRESP_PROMISC; |
| |
| if (local->fif_fcsfail) |
| new_flags |= FIF_FCSFAIL; |
| |
| if (local->fif_plcpfail) |
| new_flags |= FIF_PLCPFAIL; |
| |
| if (local->fif_control) |
| new_flags |= FIF_CONTROL; |
| |
| if (local->fif_other_bss) |
| new_flags |= FIF_OTHER_BSS; |
| |
| if (local->fif_pspoll) |
| new_flags |= FIF_PSPOLL; |
| |
| spin_lock_bh(&local->filter_lock); |
| changed_flags = local->filter_flags ^ new_flags; |
| |
| mc = drv_prepare_multicast(local, &local->mc_list); |
| spin_unlock_bh(&local->filter_lock); |
| |
| /* be a bit nasty */ |
| new_flags |= (1<<31); |
| |
| drv_configure_filter(local, changed_flags, &new_flags, mc); |
| |
| WARN_ON(new_flags & (1<<31)); |
| |
| local->filter_flags = new_flags & ~(1<<31); |
| } |
| |
| static void ieee80211_reconfig_filter(struct work_struct *work) |
| { |
| struct ieee80211_local *local = |
| container_of(work, struct ieee80211_local, reconfig_filter); |
| |
| ieee80211_configure_filter(local); |
| } |
| |
| int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) |
| { |
| struct ieee80211_channel *chan, *scan_chan; |
| int ret = 0; |
| int power; |
| enum nl80211_channel_type channel_type; |
| u32 offchannel_flag; |
| |
| might_sleep(); |
| |
| scan_chan = local->scan_channel; |
| |
| offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; |
| if (scan_chan) { |
| chan = scan_chan; |
| channel_type = NL80211_CHAN_NO_HT; |
| local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; |
| } else if (local->tmp_channel && |
| local->oper_channel != local->tmp_channel) { |
| chan = scan_chan = local->tmp_channel; |
| channel_type = local->tmp_channel_type; |
| local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; |
| } else { |
| chan = local->oper_channel; |
| channel_type = local->_oper_channel_type; |
| local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; |
| } |
| offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; |
| |
| if (offchannel_flag || chan != local->hw.conf.channel || |
| channel_type != local->hw.conf.channel_type) { |
| local->hw.conf.channel = chan; |
| local->hw.conf.channel_type = channel_type; |
| changed |= IEEE80211_CONF_CHANGE_CHANNEL; |
| } |
| |
| if (!conf_is_ht(&local->hw.conf)) { |
| /* |
| * mac80211.h documents that this is only valid |
| * when the channel is set to an HT type, and |
| * that otherwise STATIC is used. |
| */ |
| local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; |
| } else if (local->hw.conf.smps_mode != local->smps_mode) { |
| local->hw.conf.smps_mode = local->smps_mode; |
| changed |= IEEE80211_CONF_CHANGE_SMPS; |
| } |
| |
| if (scan_chan) |
| power = chan->max_power; |
| else |
| power = local->power_constr_level ? |
| (chan->max_power - local->power_constr_level) : |
| chan->max_power; |
| |
| if (local->user_power_level >= 0) |
| power = min(power, local->user_power_level); |
| |
| if (local->hw.conf.power_level != power) { |
| changed |= IEEE80211_CONF_CHANGE_POWER; |
| local->hw.conf.power_level = power; |
| } |
| |
| if (changed && local->open_count) { |
| ret = drv_config(local, changed); |
| /* |
| * Goal: |
| * HW reconfiguration should never fail, the driver has told |
| * us what it can support so it should live up to that promise. |
| * |
| * Current status: |
| * rfkill is not integrated with mac80211 and a |
| * configuration command can thus fail if hardware rfkill |
| * is enabled |
| * |
| * FIXME: integrate rfkill with mac80211 and then add this |
| * WARN_ON() back |
| * |
| */ |
| /* WARN_ON(ret); */ |
| } |
| |
| return ret; |
| } |
| |
| void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
| u32 changed) |
| { |
| struct ieee80211_local *local = sdata->local; |
| static const u8 zero[ETH_ALEN] = { 0 }; |
| |
| if (!changed) |
| return; |
| |
| if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
| /* |
| * While not associated, claim a BSSID of all-zeroes |
| * so that drivers don't do any weird things with the |
| * BSSID at that time. |
| */ |
| if (sdata->vif.bss_conf.assoc) |
| sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; |
| else |
| sdata->vif.bss_conf.bssid = zero; |
| } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
| sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; |
| else if (sdata->vif.type == NL80211_IFTYPE_AP) |
| sdata->vif.bss_conf.bssid = sdata->vif.addr; |
| else if (sdata->vif.type == NL80211_IFTYPE_WDS) |
| sdata->vif.bss_conf.bssid = NULL; |
| else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
| sdata->vif.bss_conf.bssid = zero; |
| } else { |
| WARN_ON(1); |
| return; |
| } |
| |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_AP: |
| case NL80211_IFTYPE_ADHOC: |
| case NL80211_IFTYPE_WDS: |
| case NL80211_IFTYPE_MESH_POINT: |
| break; |
| default: |
| /* do not warn to simplify caller in scan.c */ |
| changed &= ~BSS_CHANGED_BEACON_ENABLED; |
| if (WARN_ON(changed & BSS_CHANGED_BEACON)) |
| return; |
| break; |
| } |
| |
| if (changed & BSS_CHANGED_BEACON_ENABLED) { |
| if (local->quiescing || !ieee80211_sdata_running(sdata) || |
| test_bit(SCAN_SW_SCANNING, &local->scanning)) { |
| sdata->vif.bss_conf.enable_beacon = false; |
| } else { |
| /* |
| * Beacon should be enabled, but AP mode must |
| * check whether there is a beacon configured. |
| */ |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_AP: |
| sdata->vif.bss_conf.enable_beacon = |
| !!sdata->u.ap.beacon; |
| break; |
| case NL80211_IFTYPE_ADHOC: |
| sdata->vif.bss_conf.enable_beacon = |
| !!sdata->u.ibss.presp; |
| break; |
| case NL80211_IFTYPE_MESH_POINT: |
| sdata->vif.bss_conf.enable_beacon = true; |
| break; |
| default: |
| /* not reached */ |
| WARN_ON(1); |
| break; |
| } |
| } |
| } |
| |
| drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); |
| } |
| |
| u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) |
| { |
| sdata->vif.bss_conf.use_cts_prot = false; |
| sdata->vif.bss_conf.use_short_preamble = false; |
| sdata->vif.bss_conf.use_short_slot = false; |
| return BSS_CHANGED_ERP_CTS_PROT | |
| BSS_CHANGED_ERP_PREAMBLE | |
| BSS_CHANGED_ERP_SLOT; |
| } |
| |
| static void ieee80211_tasklet_handler(unsigned long data) |
| { |
| struct ieee80211_local *local = (struct ieee80211_local *) data; |
| struct sk_buff *skb; |
| |
| while ((skb = skb_dequeue(&local->skb_queue)) || |
| (skb = skb_dequeue(&local->skb_queue_unreliable))) { |
| switch (skb->pkt_type) { |
| case IEEE80211_RX_MSG: |
| /* Clear skb->pkt_type in order to not confuse kernel |
| * netstack. */ |
| skb->pkt_type = 0; |
| ieee80211_rx(local_to_hw(local), skb); |
| break; |
| case IEEE80211_TX_STATUS_MSG: |
| skb->pkt_type = 0; |
| ieee80211_tx_status(local_to_hw(local), skb); |
| break; |
| default: |
| WARN(1, "mac80211: Packet is of unknown type %d\n", |
| skb->pkt_type); |
| dev_kfree_skb(skb); |
| break; |
| } |
| } |
| } |
| |
| static void ieee80211_restart_work(struct work_struct *work) |
| { |
| struct ieee80211_local *local = |
| container_of(work, struct ieee80211_local, restart_work); |
| |
| /* wait for scan work complete */ |
| flush_workqueue(local->workqueue); |
| |
| mutex_lock(&local->mtx); |
| WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), |
| "%s called with hardware scan in progress\n", __func__); |
| mutex_unlock(&local->mtx); |
| |
| rtnl_lock(); |
| if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning))) |
| ieee80211_scan_cancel(local); |
| ieee80211_reconfig(local); |
| rtnl_unlock(); |
| } |
| |
| void ieee80211_restart_hw(struct ieee80211_hw *hw) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| trace_api_restart_hw(local); |
| |
| /* use this reason, ieee80211_reconfig will unblock it */ |
| ieee80211_stop_queues_by_reason(hw, |
| IEEE80211_QUEUE_STOP_REASON_SUSPEND); |
| |
| schedule_work(&local->restart_work); |
| } |
| EXPORT_SYMBOL(ieee80211_restart_hw); |
| |
| static void ieee80211_recalc_smps_work(struct work_struct *work) |
| { |
| struct ieee80211_local *local = |
| container_of(work, struct ieee80211_local, recalc_smps); |
| |
| mutex_lock(&local->iflist_mtx); |
| ieee80211_recalc_smps(local); |
| mutex_unlock(&local->iflist_mtx); |
| } |
| |
| #ifdef CONFIG_INET |
| static int ieee80211_ifa_changed(struct notifier_block *nb, |
| unsigned long data, void *arg) |
| { |
| struct in_ifaddr *ifa = arg; |
| struct ieee80211_local *local = |
| container_of(nb, struct ieee80211_local, |
| ifa_notifier); |
| struct net_device *ndev = ifa->ifa_dev->dev; |
| struct wireless_dev *wdev = ndev->ieee80211_ptr; |
| struct in_device *idev; |
| struct ieee80211_sub_if_data *sdata; |
| struct ieee80211_bss_conf *bss_conf; |
| struct ieee80211_if_managed *ifmgd; |
| int c = 0; |
| |
| /* Make sure it's our interface that got changed */ |
| if (!wdev) |
| return NOTIFY_DONE; |
| |
| if (wdev->wiphy != local->hw.wiphy) |
| return NOTIFY_DONE; |
| |
| sdata = IEEE80211_DEV_TO_SUB_IF(ndev); |
| bss_conf = &sdata->vif.bss_conf; |
| |
| if (!ieee80211_sdata_running(sdata)) |
| return NOTIFY_DONE; |
| |
| /* ARP filtering is only supported in managed mode */ |
| if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| return NOTIFY_DONE; |
| |
| idev = sdata->dev->ip_ptr; |
| if (!idev) |
| return NOTIFY_DONE; |
| |
| ifmgd = &sdata->u.mgd; |
| mutex_lock(&ifmgd->mtx); |
| |
| /* Copy the addresses to the bss_conf list */ |
| ifa = idev->ifa_list; |
| while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { |
| bss_conf->arp_addr_list[c] = ifa->ifa_address; |
| ifa = ifa->ifa_next; |
| c++; |
| } |
| |
| /* If not all addresses fit the list, disable filtering */ |
| if (ifa) { |
| sdata->arp_filter_state = false; |
| c = 0; |
| } else { |
| sdata->arp_filter_state = true; |
| } |
| bss_conf->arp_addr_cnt = c; |
| |
| /* Configure driver only if associated */ |
| if (ifmgd->associated) { |
| bss_conf->arp_filter_enabled = sdata->arp_filter_state; |
| ieee80211_bss_info_change_notify(sdata, |
| BSS_CHANGED_ARP_FILTER); |
| } |
| |
| mutex_unlock(&ifmgd->mtx); |
| |
| return NOTIFY_DONE; |
| } |
| #endif |
| |
| static int ieee80211_napi_poll(struct napi_struct *napi, int budget) |
| { |
| struct ieee80211_local *local = |
| container_of(napi, struct ieee80211_local, napi); |
| |
| return local->ops->napi_poll(&local->hw, budget); |
| } |
| |
| void ieee80211_napi_schedule(struct ieee80211_hw *hw) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| napi_schedule(&local->napi); |
| } |
| EXPORT_SYMBOL(ieee80211_napi_schedule); |
| |
| void ieee80211_napi_complete(struct ieee80211_hw *hw) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| napi_complete(&local->napi); |
| } |
| EXPORT_SYMBOL(ieee80211_napi_complete); |
| |
| /* There isn't a lot of sense in it, but you can transmit anything you like */ |
| static const struct ieee80211_txrx_stypes |
| ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { |
| [NL80211_IFTYPE_ADHOC] = { |
| .tx = 0xffff, |
| .rx = BIT(IEEE80211_STYPE_ACTION >> 4), |
| }, |
| [NL80211_IFTYPE_STATION] = { |
| .tx = 0xffff, |
| .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | |
| BIT(IEEE80211_STYPE_PROBE_REQ >> 4), |
| }, |
| [NL80211_IFTYPE_AP] = { |
| .tx = 0xffff, |
| .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | |
| BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | |
| BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | |
| BIT(IEEE80211_STYPE_DISASSOC >> 4) | |
| BIT(IEEE80211_STYPE_AUTH >> 4) | |
| BIT(IEEE80211_STYPE_DEAUTH >> 4) | |
| BIT(IEEE80211_STYPE_ACTION >> 4), |
| }, |
| [NL80211_IFTYPE_AP_VLAN] = { |
| /* copy AP */ |
| .tx = 0xffff, |
| .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | |
| BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | |
| BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | |
| BIT(IEEE80211_STYPE_DISASSOC >> 4) | |
| BIT(IEEE80211_STYPE_AUTH >> 4) | |
| BIT(IEEE80211_STYPE_DEAUTH >> 4) | |
| BIT(IEEE80211_STYPE_ACTION >> 4), |
| }, |
| [NL80211_IFTYPE_P2P_CLIENT] = { |
| .tx = 0xffff, |
| .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | |
| BIT(IEEE80211_STYPE_PROBE_REQ >> 4), |
| }, |
| [NL80211_IFTYPE_P2P_GO] = { |
| .tx = 0xffff, |
| .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | |
| BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | |
| BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | |
| BIT(IEEE80211_STYPE_DISASSOC >> 4) | |
| BIT(IEEE80211_STYPE_AUTH >> 4) | |
| BIT(IEEE80211_STYPE_DEAUTH >> 4) | |
| BIT(IEEE80211_STYPE_ACTION >> 4), |
| }, |
| }; |
| |
| struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
| const struct ieee80211_ops *ops) |
| { |
| struct ieee80211_local *local; |
| int priv_size, i; |
| struct wiphy *wiphy; |
| |
| /* Ensure 32-byte alignment of our private data and hw private data. |
| * We use the wiphy priv data for both our ieee80211_local and for |
| * the driver's private data |
| * |
| * In memory it'll be like this: |
| * |
| * +-------------------------+ |
| * | struct wiphy | |
| * +-------------------------+ |
| * | struct ieee80211_local | |
| * +-------------------------+ |
| * | driver's private data | |
| * +-------------------------+ |
| * |
| */ |
| priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; |
| |
| wiphy = wiphy_new(&mac80211_config_ops, priv_size); |
| |
| if (!wiphy) |
| return NULL; |
| |
| wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; |
| |
| wiphy->flags |= WIPHY_FLAG_NETNS_OK | |
| WIPHY_FLAG_4ADDR_AP | |
| WIPHY_FLAG_4ADDR_STATION; |
| wiphy->privid = mac80211_wiphy_privid; |
| |
| wiphy->bss_priv_size = sizeof(struct ieee80211_bss); |
| |
| local = wiphy_priv(wiphy); |
| |
| local->hw.wiphy = wiphy; |
| |
| local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); |
| |
| BUG_ON(!ops->tx); |
| BUG_ON(!ops->start); |
| BUG_ON(!ops->stop); |
| BUG_ON(!ops->config); |
| BUG_ON(!ops->add_interface); |
| BUG_ON(!ops->remove_interface); |
| BUG_ON(!ops->configure_filter); |
| local->ops = ops; |
| |
| /* set up some defaults */ |
| local->hw.queues = 1; |
| local->hw.max_rates = 1; |
| local->hw.max_report_rates = 0; |
| local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; |
| local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; |
| local->user_power_level = -1; |
| local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; |
| local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; |
| |
| INIT_LIST_HEAD(&local->interfaces); |
| |
| __hw_addr_init(&local->mc_list); |
| |
| mutex_init(&local->iflist_mtx); |
| mutex_init(&local->mtx); |
| |
| mutex_init(&local->key_mtx); |
| spin_lock_init(&local->filter_lock); |
| spin_lock_init(&local->queue_stop_reason_lock); |
| |
| INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); |
| |
| ieee80211_work_init(local); |
| |
| INIT_WORK(&local->restart_work, ieee80211_restart_work); |
| |
| INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); |
| INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work); |
| local->smps_mode = IEEE80211_SMPS_OFF; |
| |
| INIT_WORK(&local->dynamic_ps_enable_work, |
| ieee80211_dynamic_ps_enable_work); |
| INIT_WORK(&local->dynamic_ps_disable_work, |
| ieee80211_dynamic_ps_disable_work); |
| setup_timer(&local->dynamic_ps_timer, |
| ieee80211_dynamic_ps_timer, (unsigned long) local); |
| |
| sta_info_init(local); |
| |
| for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { |
| skb_queue_head_init(&local->pending[i]); |
| atomic_set(&local->agg_queue_stop[i], 0); |
| } |
| tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
| (unsigned long)local); |
| |
| tasklet_init(&local->tasklet, |
| ieee80211_tasklet_handler, |
| (unsigned long) local); |
| |
| skb_queue_head_init(&local->skb_queue); |
| skb_queue_head_init(&local->skb_queue_unreliable); |
| |
| /* init dummy netdev for use w/ NAPI */ |
| init_dummy_netdev(&local->napi_dev); |
| |
| return local_to_hw(local); |
| } |
| EXPORT_SYMBOL(ieee80211_alloc_hw); |
| |
| int ieee80211_register_hw(struct ieee80211_hw *hw) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| int result; |
| enum ieee80211_band band; |
| int channels, max_bitrates; |
| bool supp_ht; |
| static const u32 cipher_suites[] = { |
| /* keep WEP first, it may be removed below */ |
| WLAN_CIPHER_SUITE_WEP40, |
| WLAN_CIPHER_SUITE_WEP104, |
| WLAN_CIPHER_SUITE_TKIP, |
| WLAN_CIPHER_SUITE_CCMP, |
| |
| /* keep last -- depends on hw flags! */ |
| WLAN_CIPHER_SUITE_AES_CMAC |
| }; |
| |
| if (hw->max_report_rates == 0) |
| hw->max_report_rates = hw->max_rates; |
| |
| /* |
| * generic code guarantees at least one band, |
| * set this very early because much code assumes |
| * that hw.conf.channel is assigned |
| */ |
| channels = 0; |
| max_bitrates = 0; |
| supp_ht = false; |
| for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| struct ieee80211_supported_band *sband; |
| |
| sband = local->hw.wiphy->bands[band]; |
| if (!sband) |
| continue; |
| if (!local->oper_channel) { |
| /* init channel we're on */ |
| local->hw.conf.channel = |
| local->oper_channel = &sband->channels[0]; |
| local->hw.conf.channel_type = NL80211_CHAN_NO_HT; |
| } |
| channels += sband->n_channels; |
| |
| if (max_bitrates < sband->n_bitrates) |
| max_bitrates = sband->n_bitrates; |
| supp_ht = supp_ht || sband->ht_cap.ht_supported; |
| } |
| |
| local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + |
| sizeof(void *) * channels, GFP_KERNEL); |
| if (!local->int_scan_req) |
| return -ENOMEM; |
| |
| /* if low-level driver supports AP, we also support VLAN */ |
| if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) |
| local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); |
| |
| /* mac80211 always supports monitor */ |
| local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); |
| |
| #ifndef CONFIG_MAC80211_MESH |
| /* mesh depends on Kconfig, but drivers should set it if they want */ |
| local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); |
| #endif |
| |
| /* mac80211 supports control port protocol changing */ |
| local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; |
| |
| if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
| local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; |
| else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) |
| local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; |
| |
| WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) |
| && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), |
| "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); |
| |
| /* |
| * Calculate scan IE length -- we need this to alloc |
| * memory and to subtract from the driver limit. It |
| * includes the (extended) supported rates and HT |
| * information -- SSID is the driver's responsibility. |
| */ |
| local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ |
| if (supp_ht) |
| local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); |
| |
| if (!local->ops->hw_scan) { |
| /* For hw_scan, driver needs to set these up. */ |
| local->hw.wiphy->max_scan_ssids = 4; |
| local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; |
| } |
| |
| /* |
| * If the driver supports any scan IEs, then assume the |
| * limit includes the IEs mac80211 will add, otherwise |
| * leave it at zero and let the driver sort it out; we |
| * still pass our IEs to the driver but userspace will |
| * not be allowed to in that case. |
| */ |
| if (local->hw.wiphy->max_scan_ie_len) |
| local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; |
| |
| /* Set up cipher suites unless driver already did */ |
| if (!local->hw.wiphy->cipher_suites) { |
| local->hw.wiphy->cipher_suites = cipher_suites; |
| local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); |
| if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) |
| local->hw.wiphy->n_cipher_suites--; |
| } |
| if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { |
| if (local->hw.wiphy->cipher_suites == cipher_suites) { |
| local->hw.wiphy->cipher_suites += 2; |
| local->hw.wiphy->n_cipher_suites -= 2; |
| } else { |
| u32 *suites; |
| int r, w = 0; |
| |
| /* Filter out WEP */ |
| |
| suites = kmemdup( |
| local->hw.wiphy->cipher_suites, |
| sizeof(u32) * local->hw.wiphy->n_cipher_suites, |
| GFP_KERNEL); |
| if (!suites) |
| return -ENOMEM; |
| for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { |
| u32 suite = local->hw.wiphy->cipher_suites[r]; |
| if (suite == WLAN_CIPHER_SUITE_WEP40 || |
| suite == WLAN_CIPHER_SUITE_WEP104) |
| continue; |
| suites[w++] = suite; |
| } |
| local->hw.wiphy->cipher_suites = suites; |
| local->hw.wiphy->n_cipher_suites = w; |
| local->wiphy_ciphers_allocated = true; |
| } |
| } |
| |
| result = wiphy_register(local->hw.wiphy); |
| if (result < 0) |
| goto fail_wiphy_register; |
| |
| /* |
| * We use the number of queues for feature tests (QoS, HT) internally |
| * so restrict them appropriately. |
| */ |
| if (hw->queues > IEEE80211_MAX_QUEUES) |
| hw->queues = IEEE80211_MAX_QUEUES; |
| |
| local->workqueue = |
| create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); |
| if (!local->workqueue) { |
| result = -ENOMEM; |
| goto fail_workqueue; |
| } |
| |
| /* |
| * The hardware needs headroom for sending the frame, |
| * and we need some headroom for passing the frame to monitor |
| * interfaces, but never both at the same time. |
| */ |
| BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM != |
| sizeof(struct ieee80211_tx_status_rtap_hdr)); |
| local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
| sizeof(struct ieee80211_tx_status_rtap_hdr)); |
| |
| debugfs_hw_add(local); |
| |
| /* |
| * if the driver doesn't specify a max listen interval we |
| * use 5 which should be a safe default |
| */ |
| if (local->hw.max_listen_interval == 0) |
| local->hw.max_listen_interval = 5; |
| |
| local->hw.conf.listen_interval = local->hw.max_listen_interval; |
| |
| local->dynamic_ps_forced_timeout = -1; |
| |
| result = sta_info_start(local); |
| if (result < 0) |
| goto fail_sta_info; |
| |
| result = ieee80211_wep_init(local); |
| if (result < 0) |
| wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", |
| result); |
| |
| rtnl_lock(); |
| |
| result = ieee80211_init_rate_ctrl_alg(local, |
| hw->rate_control_algorithm); |
| if (result < 0) { |
| wiphy_debug(local->hw.wiphy, |
| "Failed to initialize rate control algorithm\n"); |
| goto fail_rate; |
| } |
| |
| /* add one default STA interface if supported */ |
| if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { |
| result = ieee80211_if_add(local, "wlan%d", NULL, |
| NL80211_IFTYPE_STATION, NULL); |
| if (result) |
| wiphy_warn(local->hw.wiphy, |
| "Failed to add default virtual iface\n"); |
| } |
| |
| rtnl_unlock(); |
| |
| ieee80211_led_init(local); |
| |
| local->network_latency_notifier.notifier_call = |
| ieee80211_max_network_latency; |
| result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, |
| &local->network_latency_notifier); |
| if (result) { |
| rtnl_lock(); |
| goto fail_pm_qos; |
| } |
| |
| #ifdef CONFIG_INET |
| local->ifa_notifier.notifier_call = ieee80211_ifa_changed; |
| result = register_inetaddr_notifier(&local->ifa_notifier); |
| if (result) |
| goto fail_ifa; |
| #endif |
| |
| netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, |
| local->hw.napi_weight); |
| |
| return 0; |
| |
| #ifdef CONFIG_INET |
| fail_ifa: |
| pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, |
| &local->network_latency_notifier); |
| rtnl_lock(); |
| #endif |
| fail_pm_qos: |
| ieee80211_led_exit(local); |
| ieee80211_remove_interfaces(local); |
| fail_rate: |
| rtnl_unlock(); |
| ieee80211_wep_free(local); |
| sta_info_stop(local); |
| fail_sta_info: |
| destroy_workqueue(local->workqueue); |
| fail_workqueue: |
| wiphy_unregister(local->hw.wiphy); |
| fail_wiphy_register: |
| if (local->wiphy_ciphers_allocated) |
| kfree(local->hw.wiphy->cipher_suites); |
| kfree(local->int_scan_req); |
| return result; |
| } |
| EXPORT_SYMBOL(ieee80211_register_hw); |
| |
| void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| tasklet_kill(&local->tx_pending_tasklet); |
| tasklet_kill(&local->tasklet); |
| |
| pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, |
| &local->network_latency_notifier); |
| #ifdef CONFIG_INET |
| unregister_inetaddr_notifier(&local->ifa_notifier); |
| #endif |
| |
| rtnl_lock(); |
| |
| /* |
| * At this point, interface list manipulations are fine |
| * because the driver cannot be handing us frames any |
| * more and the tasklet is killed. |
| */ |
| ieee80211_remove_interfaces(local); |
| |
| rtnl_unlock(); |
| |
| /* |
| * Now all work items will be gone, but the |
| * timer might still be armed, so delete it |
| */ |
| del_timer_sync(&local->work_timer); |
| |
| cancel_work_sync(&local->restart_work); |
| cancel_work_sync(&local->reconfig_filter); |
| |
| ieee80211_clear_tx_pending(local); |
| sta_info_stop(local); |
| rate_control_deinitialize(local); |
| |
| if (skb_queue_len(&local->skb_queue) || |
| skb_queue_len(&local->skb_queue_unreliable)) |
| wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); |
| skb_queue_purge(&local->skb_queue); |
| skb_queue_purge(&local->skb_queue_unreliable); |
| |
| destroy_workqueue(local->workqueue); |
| wiphy_unregister(local->hw.wiphy); |
| ieee80211_wep_free(local); |
| ieee80211_led_exit(local); |
| kfree(local->int_scan_req); |
| } |
| EXPORT_SYMBOL(ieee80211_unregister_hw); |
| |
| void ieee80211_free_hw(struct ieee80211_hw *hw) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| mutex_destroy(&local->iflist_mtx); |
| mutex_destroy(&local->mtx); |
| |
| if (local->wiphy_ciphers_allocated) |
| kfree(local->hw.wiphy->cipher_suites); |
| |
| wiphy_free(local->hw.wiphy); |
| } |
| EXPORT_SYMBOL(ieee80211_free_hw); |
| |
| static int __init ieee80211_init(void) |
| { |
| struct sk_buff *skb; |
| int ret; |
| |
| BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
| BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + |
| IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); |
| |
| ret = rc80211_minstrel_init(); |
| if (ret) |
| return ret; |
| |
| ret = rc80211_minstrel_ht_init(); |
| if (ret) |
| goto err_minstrel; |
| |
| ret = rc80211_pid_init(); |
| if (ret) |
| goto err_pid; |
| |
| ret = ieee80211_iface_init(); |
| if (ret) |
| goto err_netdev; |
| |
| return 0; |
| err_netdev: |
| rc80211_pid_exit(); |
| err_pid: |
| rc80211_minstrel_ht_exit(); |
| err_minstrel: |
| rc80211_minstrel_exit(); |
| |
| return ret; |
| } |
| |
| static void __exit ieee80211_exit(void) |
| { |
| rc80211_pid_exit(); |
| rc80211_minstrel_ht_exit(); |
| rc80211_minstrel_exit(); |
| |
| /* |
| * For key todo, it'll be empty by now but the work |
| * might still be scheduled. |
| */ |
| flush_scheduled_work(); |
| |
| if (mesh_allocated) |
| ieee80211s_stop(); |
| |
| ieee80211_iface_exit(); |
| } |
| |
| |
| subsys_initcall(ieee80211_init); |
| module_exit(ieee80211_exit); |
| |
| MODULE_DESCRIPTION("IEEE 802.11 subsystem"); |
| MODULE_LICENSE("GPL"); |