| /* |
| * 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 <net/ieee80211_radiotap.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/wireless.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/bitmap.h> |
| #include <linux/pm_qos_params.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 "wme.h" |
| #include "aes_ccm.h" |
| #include "led.h" |
| #include "cfg.h" |
| #include "debugfs.h" |
| #include "debugfs_netdev.h" |
| |
| /* |
| * For seeing transmitted packets on monitor interfaces |
| * we have a radiotap header too. |
| */ |
| struct ieee80211_tx_status_rtap_hdr { |
| struct ieee80211_radiotap_header hdr; |
| u8 rate; |
| u8 padding_for_rate; |
| __le16 tx_flags; |
| u8 data_retries; |
| } __attribute__ ((packed)); |
| |
| |
| /* must be called under mdev tx lock */ |
| void ieee80211_configure_filter(struct ieee80211_local *local) |
| { |
| 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) |
| 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; |
| |
| changed_flags = local->filter_flags ^ new_flags; |
| |
| /* be a bit nasty */ |
| new_flags |= (1<<31); |
| |
| drv_configure_filter(local, changed_flags, &new_flags, |
| local->mc_count, |
| local->mc_list); |
| |
| WARN_ON(new_flags & (1<<31)); |
| |
| local->filter_flags = new_flags & ~(1<<31); |
| } |
| |
| 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; |
| |
| might_sleep(); |
| |
| scan_chan = local->scan_channel; |
| |
| if (scan_chan) { |
| chan = scan_chan; |
| channel_type = NL80211_CHAN_NO_HT; |
| } else { |
| chan = local->oper_channel; |
| channel_type = local->oper_channel_type; |
| } |
| |
| if (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 (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->dev->dev_addr; |
| 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_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 (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 = |
| !!rcu_dereference(sdata->u.ap.beacon); |
| break; |
| case NL80211_IFTYPE_ADHOC: |
| sdata->vif.bss_conf.enable_beacon = |
| !!rcu_dereference(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->vif, |
| &sdata->vif.bss_conf, changed); |
| |
| /* DEPRECATED */ |
| local->hw.conf.beacon_int = sdata->vif.bss_conf.beacon_int; |
| } |
| |
| 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; |
| } |
| |
| void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
| struct sk_buff *skb) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| int tmp; |
| |
| skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
| skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
| &local->skb_queue : &local->skb_queue_unreliable, skb); |
| tmp = skb_queue_len(&local->skb_queue) + |
| skb_queue_len(&local->skb_queue_unreliable); |
| while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && |
| (skb = skb_dequeue(&local->skb_queue_unreliable))) { |
| dev_kfree_skb_irq(skb); |
| tmp--; |
| I802_DEBUG_INC(local->tx_status_drop); |
| } |
| tasklet_schedule(&local->tasklet); |
| } |
| EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); |
| |
| static void ieee80211_tasklet_handler(unsigned long data) |
| { |
| struct ieee80211_local *local = (struct ieee80211_local *) data; |
| struct sk_buff *skb; |
| struct ieee80211_ra_tid *ra_tid; |
| |
| 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; |
| case IEEE80211_DELBA_MSG: |
| ra_tid = (struct ieee80211_ra_tid *) &skb->cb; |
| ieee80211_stop_tx_ba_cb(local_to_hw(local), |
| ra_tid->ra, ra_tid->tid); |
| dev_kfree_skb(skb); |
| break; |
| case IEEE80211_ADDBA_MSG: |
| ra_tid = (struct ieee80211_ra_tid *) &skb->cb; |
| ieee80211_start_tx_ba_cb(local_to_hw(local), |
| ra_tid->ra, ra_tid->tid); |
| dev_kfree_skb(skb); |
| break ; |
| default: |
| WARN(1, "mac80211: Packet is of unknown type %d\n", |
| skb->pkt_type); |
| dev_kfree_skb(skb); |
| break; |
| } |
| } |
| } |
| |
| static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
| struct sta_info *sta, |
| struct sk_buff *skb) |
| { |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| |
| /* |
| * XXX: This is temporary! |
| * |
| * The problem here is that when we get here, the driver will |
| * quite likely have pretty much overwritten info->control by |
| * using info->driver_data or info->rate_driver_data. Thus, |
| * when passing out the frame to the driver again, we would be |
| * passing completely bogus data since the driver would then |
| * expect a properly filled info->control. In mac80211 itself |
| * the same problem occurs, since we need info->control.vif |
| * internally. |
| * |
| * To fix this, we should send the frame through TX processing |
| * again. However, it's not that simple, since the frame will |
| * have been software-encrypted (if applicable) already, and |
| * encrypting it again doesn't do much good. So to properly do |
| * that, we not only have to skip the actual 'raw' encryption |
| * (key selection etc. still has to be done!) but also the |
| * sequence number assignment since that impacts the crypto |
| * encapsulation, of course. |
| * |
| * Hence, for now, fix the bug by just dropping the frame. |
| */ |
| goto drop; |
| |
| sta->tx_filtered_count++; |
| |
| /* |
| * Clear the TX filter mask for this STA when sending the next |
| * packet. If the STA went to power save mode, this will happen |
| * when it wakes up for the next time. |
| */ |
| set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
| |
| /* |
| * This code races in the following way: |
| * |
| * (1) STA sends frame indicating it will go to sleep and does so |
| * (2) hardware/firmware adds STA to filter list, passes frame up |
| * (3) hardware/firmware processes TX fifo and suppresses a frame |
| * (4) we get TX status before having processed the frame and |
| * knowing that the STA has gone to sleep. |
| * |
| * This is actually quite unlikely even when both those events are |
| * processed from interrupts coming in quickly after one another or |
| * even at the same time because we queue both TX status events and |
| * RX frames to be processed by a tasklet and process them in the |
| * same order that they were received or TX status last. Hence, there |
| * is no race as long as the frame RX is processed before the next TX |
| * status, which drivers can ensure, see below. |
| * |
| * Note that this can only happen if the hardware or firmware can |
| * actually add STAs to the filter list, if this is done by the |
| * driver in response to set_tim() (which will only reduce the race |
| * this whole filtering tries to solve, not completely solve it) |
| * this situation cannot happen. |
| * |
| * To completely solve this race drivers need to make sure that they |
| * (a) don't mix the irq-safe/not irq-safe TX status/RX processing |
| * functions and |
| * (b) always process RX events before TX status events if ordering |
| * can be unknown, for example with different interrupt status |
| * bits. |
| */ |
| if (test_sta_flags(sta, WLAN_STA_PS) && |
| skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
| skb_queue_tail(&sta->tx_filtered, skb); |
| return; |
| } |
| |
| if (!test_sta_flags(sta, WLAN_STA_PS) && |
| !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
| /* Software retry the packet once */ |
| info->flags |= IEEE80211_TX_INTFL_RETRIED; |
| ieee80211_add_pending_skb(local, skb); |
| return; |
| } |
| |
| drop: |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| if (net_ratelimit()) |
| printk(KERN_DEBUG "%s: dropped TX filtered frame, " |
| "queue_len=%d PS=%d @%lu\n", |
| wiphy_name(local->hw.wiphy), |
| skb_queue_len(&sta->tx_filtered), |
| !!test_sta_flags(sta, WLAN_STA_PS), jiffies); |
| #endif |
| dev_kfree_skb(skb); |
| } |
| |
| void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
| { |
| struct sk_buff *skb2; |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| u16 frag, type; |
| __le16 fc; |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_tx_status_rtap_hdr *rthdr; |
| struct ieee80211_sub_if_data *sdata; |
| struct net_device *prev_dev = NULL; |
| struct sta_info *sta; |
| int retry_count = -1, i; |
| |
| for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
| /* the HW cannot have attempted that rate */ |
| if (i >= hw->max_rates) { |
| info->status.rates[i].idx = -1; |
| info->status.rates[i].count = 0; |
| } |
| |
| retry_count += info->status.rates[i].count; |
| } |
| if (retry_count < 0) |
| retry_count = 0; |
| |
| rcu_read_lock(); |
| |
| sband = local->hw.wiphy->bands[info->band]; |
| |
| sta = sta_info_get(local, hdr->addr1); |
| |
| if (sta) { |
| if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
| test_sta_flags(sta, WLAN_STA_PS)) { |
| /* |
| * The STA is in power save mode, so assume |
| * that this TX packet failed because of that. |
| */ |
| ieee80211_handle_filtered_frame(local, sta, skb); |
| rcu_read_unlock(); |
| return; |
| } |
| |
| fc = hdr->frame_control; |
| |
| if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
| (ieee80211_is_data_qos(fc))) { |
| u16 tid, ssn; |
| u8 *qc; |
| |
| qc = ieee80211_get_qos_ctl(hdr); |
| tid = qc[0] & 0xf; |
| ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) |
| & IEEE80211_SCTL_SEQ); |
| ieee80211_send_bar(sta->sdata, hdr->addr1, |
| tid, ssn); |
| } |
| |
| if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
| ieee80211_handle_filtered_frame(local, sta, skb); |
| rcu_read_unlock(); |
| return; |
| } else { |
| if (!(info->flags & IEEE80211_TX_STAT_ACK)) |
| sta->tx_retry_failed++; |
| sta->tx_retry_count += retry_count; |
| } |
| |
| rate_control_tx_status(local, sband, sta, skb); |
| } |
| |
| rcu_read_unlock(); |
| |
| ieee80211_led_tx(local, 0); |
| |
| /* SNMP counters |
| * Fragments are passed to low-level drivers as separate skbs, so these |
| * are actually fragments, not frames. Update frame counters only for |
| * the first fragment of the frame. */ |
| |
| frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; |
| type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; |
| |
| if (info->flags & IEEE80211_TX_STAT_ACK) { |
| if (frag == 0) { |
| local->dot11TransmittedFrameCount++; |
| if (is_multicast_ether_addr(hdr->addr1)) |
| local->dot11MulticastTransmittedFrameCount++; |
| if (retry_count > 0) |
| local->dot11RetryCount++; |
| if (retry_count > 1) |
| local->dot11MultipleRetryCount++; |
| } |
| |
| /* This counter shall be incremented for an acknowledged MPDU |
| * with an individual address in the address 1 field or an MPDU |
| * with a multicast address in the address 1 field of type Data |
| * or Management. */ |
| if (!is_multicast_ether_addr(hdr->addr1) || |
| type == IEEE80211_FTYPE_DATA || |
| type == IEEE80211_FTYPE_MGMT) |
| local->dot11TransmittedFragmentCount++; |
| } else { |
| if (frag == 0) |
| local->dot11FailedCount++; |
| } |
| |
| /* this was a transmitted frame, but now we want to reuse it */ |
| skb_orphan(skb); |
| |
| /* |
| * This is a bit racy but we can avoid a lot of work |
| * with this test... |
| */ |
| if (!local->monitors && !local->cooked_mntrs) { |
| dev_kfree_skb(skb); |
| return; |
| } |
| |
| /* send frame to monitor interfaces now */ |
| |
| if (skb_headroom(skb) < sizeof(*rthdr)) { |
| printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); |
| dev_kfree_skb(skb); |
| return; |
| } |
| |
| rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
| skb_push(skb, sizeof(*rthdr)); |
| |
| memset(rthdr, 0, sizeof(*rthdr)); |
| rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); |
| rthdr->hdr.it_present = |
| cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | |
| (1 << IEEE80211_RADIOTAP_DATA_RETRIES) | |
| (1 << IEEE80211_RADIOTAP_RATE)); |
| |
| if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
| !is_multicast_ether_addr(hdr->addr1)) |
| rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); |
| |
| /* |
| * XXX: Once radiotap gets the bitmap reset thing the vendor |
| * extensions proposal contains, we can actually report |
| * the whole set of tries we did. |
| */ |
| if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || |
| (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) |
| rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
| else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
| rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
| if (info->status.rates[0].idx >= 0 && |
| !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) |
| rthdr->rate = sband->bitrates[ |
| info->status.rates[0].idx].bitrate / 5; |
| |
| /* for now report the total retry_count */ |
| rthdr->data_retries = retry_count; |
| |
| /* XXX: is this sufficient for BPF? */ |
| skb_set_mac_header(skb, 0); |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| skb->pkt_type = PACKET_OTHERHOST; |
| skb->protocol = htons(ETH_P_802_2); |
| memset(skb->cb, 0, sizeof(skb->cb)); |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
| if (!netif_running(sdata->dev)) |
| continue; |
| |
| if (prev_dev) { |
| skb2 = skb_clone(skb, GFP_ATOMIC); |
| if (skb2) { |
| skb2->dev = prev_dev; |
| netif_rx(skb2); |
| } |
| } |
| |
| prev_dev = sdata->dev; |
| } |
| } |
| if (prev_dev) { |
| skb->dev = prev_dev; |
| netif_rx(skb); |
| skb = NULL; |
| } |
| rcu_read_unlock(); |
| dev_kfree_skb(skb); |
| } |
| EXPORT_SYMBOL(ieee80211_tx_status); |
| |
| static void ieee80211_restart_work(struct work_struct *work) |
| { |
| struct ieee80211_local *local = |
| container_of(work, struct ieee80211_local, restart_work); |
| |
| rtnl_lock(); |
| ieee80211_reconfig(local); |
| rtnl_unlock(); |
| } |
| |
| void ieee80211_restart_hw(struct ieee80211_hw *hw) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| /* use this reason, __ieee80211_resume will unblock it */ |
| ieee80211_stop_queues_by_reason(hw, |
| IEEE80211_QUEUE_STOP_REASON_SUSPEND); |
| |
| schedule_work(&local->restart_work); |
| } |
| EXPORT_SYMBOL(ieee80211_restart_hw); |
| |
| 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->netnsok = true; |
| wiphy->privid = mac80211_wiphy_privid; |
| |
| /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */ |
| wiphy->bss_priv_size = sizeof(struct ieee80211_bss) - |
| sizeof(struct cfg80211_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.conf.long_frame_max_tx_count = wiphy->retry_long; |
| local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; |
| local->hw.conf.radio_enabled = true; |
| local->user_power_level = -1; |
| |
| INIT_LIST_HEAD(&local->interfaces); |
| mutex_init(&local->iflist_mtx); |
| mutex_init(&local->scan_mtx); |
| |
| spin_lock_init(&local->key_lock); |
| spin_lock_init(&local->filter_lock); |
| spin_lock_init(&local->queue_stop_reason_lock); |
| |
| INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); |
| |
| INIT_WORK(&local->restart_work, ieee80211_restart_work); |
| |
| 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]); |
| tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
| (unsigned long)local); |
| tasklet_disable(&local->tx_pending_tasklet); |
| |
| tasklet_init(&local->tasklet, |
| ieee80211_tasklet_handler, |
| (unsigned long) local); |
| tasklet_disable(&local->tasklet); |
| |
| skb_queue_head_init(&local->skb_queue); |
| skb_queue_head_init(&local->skb_queue_unreliable); |
| |
| spin_lock_init(&local->ampdu_lock); |
| |
| 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, i, j, max_bitrates; |
| bool supp_ht; |
| static const u32 cipher_suites[] = { |
| 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 |
| }; |
| |
| /* |
| * 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.n_channels = channels; |
| local->int_scan_req.channels = kzalloc(sizeof(void *) * channels, GFP_KERNEL); |
| if (!local->int_scan_req.channels) |
| 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); |
| |
| 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; |
| |
| /* |
| * 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; |
| |
| 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--; |
| |
| 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->hw.workqueue = |
| create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); |
| if (!local->hw.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. |
| */ |
| local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
| sizeof(struct ieee80211_tx_status_rtap_hdr)); |
| |
| debugfs_hw_add(local); |
| |
| if (local->hw.max_listen_interval == 0) |
| local->hw.max_listen_interval = 1; |
| |
| local->hw.conf.listen_interval = local->hw.max_listen_interval; |
| |
| result = sta_info_start(local); |
| if (result < 0) |
| goto fail_sta_info; |
| |
| result = ieee80211_wep_init(local); |
| if (result < 0) { |
| printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", |
| wiphy_name(local->hw.wiphy), result); |
| goto fail_wep; |
| } |
| |
| rtnl_lock(); |
| |
| result = ieee80211_init_rate_ctrl_alg(local, |
| hw->rate_control_algorithm); |
| if (result < 0) { |
| printk(KERN_DEBUG "%s: Failed to initialize rate control " |
| "algorithm\n", wiphy_name(local->hw.wiphy)); |
| 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) |
| printk(KERN_WARNING "%s: Failed to add default virtual iface\n", |
| wiphy_name(local->hw.wiphy)); |
| } |
| |
| rtnl_unlock(); |
| |
| ieee80211_led_init(local); |
| |
| /* alloc internal scan request */ |
| i = 0; |
| local->int_scan_req.ssids = &local->scan_ssid; |
| local->int_scan_req.n_ssids = 1; |
| for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| if (!hw->wiphy->bands[band]) |
| continue; |
| for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) { |
| local->int_scan_req.channels[i] = |
| &hw->wiphy->bands[band]->channels[j]; |
| i++; |
| } |
| } |
| |
| 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; |
| } |
| |
| return 0; |
| |
| fail_pm_qos: |
| ieee80211_led_exit(local); |
| ieee80211_remove_interfaces(local); |
| fail_rate: |
| rtnl_unlock(); |
| ieee80211_wep_free(local); |
| fail_wep: |
| sta_info_stop(local); |
| fail_sta_info: |
| debugfs_hw_del(local); |
| destroy_workqueue(local->hw.workqueue); |
| fail_workqueue: |
| wiphy_unregister(local->hw.wiphy); |
| fail_wiphy_register: |
| kfree(local->int_scan_req.channels); |
| 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); |
| |
| 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(); |
| |
| ieee80211_clear_tx_pending(local); |
| sta_info_stop(local); |
| rate_control_deinitialize(local); |
| debugfs_hw_del(local); |
| |
| if (skb_queue_len(&local->skb_queue) |
| || skb_queue_len(&local->skb_queue_unreliable)) |
| printk(KERN_WARNING "%s: skb_queue not empty\n", |
| wiphy_name(local->hw.wiphy)); |
| skb_queue_purge(&local->skb_queue); |
| skb_queue_purge(&local->skb_queue_unreliable); |
| |
| destroy_workqueue(local->hw.workqueue); |
| wiphy_unregister(local->hw.wiphy); |
| ieee80211_wep_free(local); |
| ieee80211_led_exit(local); |
| kfree(local->int_scan_req.channels); |
| } |
| 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->scan_mtx); |
| |
| 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_pid_init(); |
| if (ret) |
| return ret; |
| |
| ieee80211_debugfs_netdev_init(); |
| |
| return 0; |
| } |
| |
| static void __exit ieee80211_exit(void) |
| { |
| rc80211_pid_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_debugfs_netdev_exit(); |
| } |
| |
| |
| subsys_initcall(ieee80211_init); |
| module_exit(ieee80211_exit); |
| |
| MODULE_DESCRIPTION("IEEE 802.11 subsystem"); |
| MODULE_LICENSE("GPL"); |