| /* |
| Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> |
| <http://rt2x00.serialmonkey.com> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| Module: rt2x00mac |
| Abstract: rt2x00 generic mac80211 routines. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| |
| #include "rt2x00.h" |
| #include "rt2x00lib.h" |
| |
| static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev, |
| struct data_queue *queue, |
| struct sk_buff *frag_skb) |
| { |
| struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(frag_skb); |
| struct ieee80211_tx_info *rts_info; |
| struct sk_buff *skb; |
| unsigned int data_length; |
| int retval = 0; |
| |
| if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
| data_length = sizeof(struct ieee80211_cts); |
| else |
| data_length = sizeof(struct ieee80211_rts); |
| |
| skb = dev_alloc_skb(data_length + rt2x00dev->hw->extra_tx_headroom); |
| if (unlikely(!skb)) { |
| rt2x00_warn(rt2x00dev, "Failed to create RTS/CTS frame\n"); |
| return -ENOMEM; |
| } |
| |
| skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom); |
| skb_put(skb, data_length); |
| |
| /* |
| * Copy TX information over from original frame to |
| * RTS/CTS frame. Note that we set the no encryption flag |
| * since we don't want this frame to be encrypted. |
| * RTS frames should be acked, while CTS-to-self frames |
| * should not. The ready for TX flag is cleared to prevent |
| * it being automatically send when the descriptor is |
| * written to the hardware. |
| */ |
| memcpy(skb->cb, frag_skb->cb, sizeof(skb->cb)); |
| rts_info = IEEE80211_SKB_CB(skb); |
| rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_RTS_CTS; |
| rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_CTS_PROTECT; |
| |
| if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
| rts_info->flags |= IEEE80211_TX_CTL_NO_ACK; |
| else |
| rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK; |
| |
| /* Disable hardware encryption */ |
| rts_info->control.hw_key = NULL; |
| |
| /* |
| * RTS/CTS frame should use the length of the frame plus any |
| * encryption overhead that will be added by the hardware. |
| */ |
| data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb); |
| |
| if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
| ieee80211_ctstoself_get(rt2x00dev->hw, tx_info->control.vif, |
| frag_skb->data, data_length, tx_info, |
| (struct ieee80211_cts *)(skb->data)); |
| else |
| ieee80211_rts_get(rt2x00dev->hw, tx_info->control.vif, |
| frag_skb->data, data_length, tx_info, |
| (struct ieee80211_rts *)(skb->data)); |
| |
| retval = rt2x00queue_write_tx_frame(queue, skb, NULL, true); |
| if (retval) { |
| dev_kfree_skb_any(skb); |
| rt2x00_warn(rt2x00dev, "Failed to send RTS/CTS frame\n"); |
| } |
| |
| return retval; |
| } |
| |
| void rt2x00mac_tx(struct ieee80211_hw *hw, |
| struct ieee80211_tx_control *control, |
| struct sk_buff *skb) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| enum data_queue_qid qid = skb_get_queue_mapping(skb); |
| struct data_queue *queue = NULL; |
| |
| /* |
| * Mac80211 might be calling this function while we are trying |
| * to remove the device or perhaps suspending it. |
| * Note that we can only stop the TX queues inside the TX path |
| * due to possible race conditions in mac80211. |
| */ |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
| goto exit_free_skb; |
| |
| /* |
| * Use the ATIM queue if appropriate and present. |
| */ |
| if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && |
| rt2x00_has_cap_flag(rt2x00dev, REQUIRE_ATIM_QUEUE)) |
| qid = QID_ATIM; |
| |
| queue = rt2x00queue_get_tx_queue(rt2x00dev, qid); |
| if (unlikely(!queue)) { |
| rt2x00_err(rt2x00dev, |
| "Attempt to send packet over invalid queue %d\n" |
| "Please file bug report to %s\n", qid, DRV_PROJECT); |
| goto exit_free_skb; |
| } |
| |
| /* |
| * If CTS/RTS is required. create and queue that frame first. |
| * Make sure we have at least enough entries available to send |
| * this CTS/RTS frame as well as the data frame. |
| * Note that when the driver has set the set_rts_threshold() |
| * callback function it doesn't need software generation of |
| * either RTS or CTS-to-self frame and handles everything |
| * inside the hardware. |
| */ |
| if (!rt2x00dev->ops->hw->set_rts_threshold && |
| (tx_info->control.rates[0].flags & (IEEE80211_TX_RC_USE_RTS_CTS | |
| IEEE80211_TX_RC_USE_CTS_PROTECT))) { |
| if (rt2x00queue_available(queue) <= 1) { |
| /* |
| * Recheck for full queue under lock to avoid race |
| * conditions with rt2x00lib_txdone(). |
| */ |
| spin_lock(&queue->tx_lock); |
| if (rt2x00queue_threshold(queue)) |
| rt2x00queue_pause_queue(queue); |
| spin_unlock(&queue->tx_lock); |
| |
| goto exit_free_skb; |
| } |
| |
| if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb)) |
| goto exit_free_skb; |
| } |
| |
| if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false))) |
| goto exit_free_skb; |
| |
| return; |
| |
| exit_free_skb: |
| ieee80211_free_txskb(hw, skb); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_tx); |
| |
| int rt2x00mac_start(struct ieee80211_hw *hw) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
| return 0; |
| |
| return rt2x00lib_start(rt2x00dev); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_start); |
| |
| void rt2x00mac_stop(struct ieee80211_hw *hw) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
| return; |
| |
| rt2x00lib_stop(rt2x00dev); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_stop); |
| |
| int rt2x00mac_add_interface(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct rt2x00_intf *intf = vif_to_intf(vif); |
| struct data_queue *queue = rt2x00dev->bcn; |
| struct queue_entry *entry = NULL; |
| unsigned int i; |
| |
| /* |
| * Don't allow interfaces to be added |
| * the device has disappeared. |
| */ |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
| !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) |
| return -ENODEV; |
| |
| /* |
| * Loop through all beacon queues to find a free |
| * entry. Since there are as much beacon entries |
| * as the maximum interfaces, this search shouldn't |
| * fail. |
| */ |
| for (i = 0; i < queue->limit; i++) { |
| entry = &queue->entries[i]; |
| if (!test_and_set_bit(ENTRY_BCN_ASSIGNED, &entry->flags)) |
| break; |
| } |
| |
| if (unlikely(i == queue->limit)) |
| return -ENOBUFS; |
| |
| /* |
| * We are now absolutely sure the interface can be created, |
| * increase interface count and start initialization. |
| */ |
| |
| if (vif->type == NL80211_IFTYPE_AP) |
| rt2x00dev->intf_ap_count++; |
| else |
| rt2x00dev->intf_sta_count++; |
| |
| mutex_init(&intf->beacon_skb_mutex); |
| intf->beacon = entry; |
| |
| /* |
| * The MAC address must be configured after the device |
| * has been initialized. Otherwise the device can reset |
| * the MAC registers. |
| * The BSSID address must only be configured in AP mode, |
| * however we should not send an empty BSSID address for |
| * STA interfaces at this time, since this can cause |
| * invalid behavior in the device. |
| */ |
| rt2x00lib_config_intf(rt2x00dev, intf, vif->type, |
| vif->addr, NULL); |
| |
| /* |
| * Some filters depend on the current working mode. We can force |
| * an update during the next configure_filter() run by mac80211 by |
| * resetting the current packet_filter state. |
| */ |
| rt2x00dev->packet_filter = 0; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_add_interface); |
| |
| void rt2x00mac_remove_interface(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct rt2x00_intf *intf = vif_to_intf(vif); |
| |
| /* |
| * Don't allow interfaces to be remove while |
| * either the device has disappeared or when |
| * no interface is present. |
| */ |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
| (vif->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) || |
| (vif->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count)) |
| return; |
| |
| if (vif->type == NL80211_IFTYPE_AP) |
| rt2x00dev->intf_ap_count--; |
| else |
| rt2x00dev->intf_sta_count--; |
| |
| /* |
| * Release beacon entry so it is available for |
| * new interfaces again. |
| */ |
| clear_bit(ENTRY_BCN_ASSIGNED, &intf->beacon->flags); |
| |
| /* |
| * Make sure the bssid and mac address registers |
| * are cleared to prevent false ACKing of frames. |
| */ |
| rt2x00lib_config_intf(rt2x00dev, intf, |
| NL80211_IFTYPE_UNSPECIFIED, NULL, NULL); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface); |
| |
| int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct ieee80211_conf *conf = &hw->conf; |
| |
| /* |
| * mac80211 might be calling this function while we are trying |
| * to remove the device or perhaps suspending it. |
| */ |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
| return 0; |
| |
| /* |
| * Some configuration parameters (e.g. channel and antenna values) can |
| * only be set when the radio is enabled, but do require the RX to |
| * be off. During this period we should keep link tuning enabled, |
| * if for any reason the link tuner must be reset, this will be |
| * handled by rt2x00lib_config(). |
| */ |
| rt2x00queue_stop_queue(rt2x00dev->rx); |
| |
| /* Do not race with with link tuner. */ |
| mutex_lock(&rt2x00dev->conf_mutex); |
| |
| /* |
| * When we've just turned on the radio, we want to reprogram |
| * everything to ensure a consistent state |
| */ |
| rt2x00lib_config(rt2x00dev, conf, changed); |
| |
| /* |
| * After the radio has been enabled we need to configure |
| * the antenna to the default settings. rt2x00lib_config_antenna() |
| * should determine if any action should be taken based on |
| * checking if diversity has been enabled or no antenna changes |
| * have been made since the last configuration change. |
| */ |
| rt2x00lib_config_antenna(rt2x00dev, rt2x00dev->default_ant); |
| |
| mutex_unlock(&rt2x00dev->conf_mutex); |
| |
| /* Turn RX back on */ |
| rt2x00queue_start_queue(rt2x00dev->rx); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_config); |
| |
| void rt2x00mac_configure_filter(struct ieee80211_hw *hw, |
| unsigned int changed_flags, |
| unsigned int *total_flags, |
| u64 multicast) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| |
| /* |
| * Mask off any flags we are going to ignore |
| * from the total_flags field. |
| */ |
| *total_flags &= |
| FIF_ALLMULTI | |
| FIF_FCSFAIL | |
| FIF_PLCPFAIL | |
| FIF_CONTROL | |
| FIF_PSPOLL | |
| FIF_OTHER_BSS; |
| |
| /* |
| * Apply some rules to the filters: |
| * - Some filters imply different filters to be set. |
| * - Some things we can't filter out at all. |
| * - Multicast filter seems to kill broadcast traffic so never use it. |
| */ |
| *total_flags |= FIF_ALLMULTI; |
| |
| /* |
| * If the device has a single filter for all control frames, |
| * FIF_CONTROL and FIF_PSPOLL flags imply each other. |
| * And if the device has more than one filter for control frames |
| * of different types, but has no a separate filter for PS Poll frames, |
| * FIF_CONTROL flag implies FIF_PSPOLL. |
| */ |
| if (!rt2x00_has_cap_control_filters(rt2x00dev)) { |
| if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL) |
| *total_flags |= FIF_CONTROL | FIF_PSPOLL; |
| } |
| if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev)) { |
| if (*total_flags & FIF_CONTROL) |
| *total_flags |= FIF_PSPOLL; |
| } |
| |
| rt2x00dev->packet_filter = *total_flags; |
| |
| rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter); |
| |
| static void rt2x00mac_set_tim_iter(void *data, u8 *mac, |
| struct ieee80211_vif *vif) |
| { |
| struct rt2x00_intf *intf = vif_to_intf(vif); |
| |
| if (vif->type != NL80211_IFTYPE_AP && |
| vif->type != NL80211_IFTYPE_ADHOC && |
| vif->type != NL80211_IFTYPE_MESH_POINT && |
| vif->type != NL80211_IFTYPE_WDS) |
| return; |
| |
| set_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags); |
| } |
| |
| int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, |
| bool set) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| |
| if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
| return 0; |
| |
| ieee80211_iterate_active_interfaces_atomic( |
| rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL, |
| rt2x00mac_set_tim_iter, rt2x00dev); |
| |
| /* queue work to upodate the beacon template */ |
| ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_set_tim); |
| |
| #ifdef CONFIG_RT2X00_LIB_CRYPTO |
| static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len) |
| { |
| if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY) |
| memcpy(crypto->key, |
| &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY], |
| sizeof(crypto->key)); |
| |
| if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY) |
| memcpy(crypto->tx_mic, |
| &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], |
| sizeof(crypto->tx_mic)); |
| |
| if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY) |
| memcpy(crypto->rx_mic, |
| &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], |
| sizeof(crypto->rx_mic)); |
| } |
| |
| int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, |
| struct ieee80211_vif *vif, struct ieee80211_sta *sta, |
| struct ieee80211_key_conf *key) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| int (*set_key) (struct rt2x00_dev *rt2x00dev, |
| struct rt2x00lib_crypto *crypto, |
| struct ieee80211_key_conf *key); |
| struct rt2x00lib_crypto crypto; |
| static const u8 bcast_addr[ETH_ALEN] = |
| { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; |
| struct rt2x00_sta *sta_priv = NULL; |
| |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
| return 0; |
| |
| if (!rt2x00_has_cap_hw_crypto(rt2x00dev)) |
| return -EOPNOTSUPP; |
| |
| /* |
| * To support IBSS RSN, don't program group keys in IBSS, the |
| * hardware will then not attempt to decrypt the frames. |
| */ |
| if (vif->type == NL80211_IFTYPE_ADHOC && |
| !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) |
| return -EOPNOTSUPP; |
| |
| if (key->keylen > 32) |
| return -ENOSPC; |
| |
| memset(&crypto, 0, sizeof(crypto)); |
| |
| crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif); |
| crypto.cipher = rt2x00crypto_key_to_cipher(key); |
| if (crypto.cipher == CIPHER_NONE) |
| return -EOPNOTSUPP; |
| if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev)) |
| return -EOPNOTSUPP; |
| |
| crypto.cmd = cmd; |
| |
| if (sta) { |
| crypto.address = sta->addr; |
| sta_priv = sta_to_rt2x00_sta(sta); |
| crypto.wcid = sta_priv->wcid; |
| } else |
| crypto.address = bcast_addr; |
| |
| if (crypto.cipher == CIPHER_TKIP) |
| memcpy_tkip(&crypto, &key->key[0], key->keylen); |
| else |
| memcpy(crypto.key, &key->key[0], key->keylen); |
| /* |
| * Each BSS has a maximum of 4 shared keys. |
| * Shared key index values: |
| * 0) BSS0 key0 |
| * 1) BSS0 key1 |
| * ... |
| * 4) BSS1 key0 |
| * ... |
| * 8) BSS2 key0 |
| * ... |
| * Both pairwise as shared key indeces are determined by |
| * driver. This is required because the hardware requires |
| * keys to be assigned in correct order (When key 1 is |
| * provided but key 0 is not, then the key is not found |
| * by the hardware during RX). |
| */ |
| if (cmd == SET_KEY) |
| key->hw_key_idx = 0; |
| |
| if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) |
| set_key = rt2x00dev->ops->lib->config_pairwise_key; |
| else |
| set_key = rt2x00dev->ops->lib->config_shared_key; |
| |
| if (!set_key) |
| return -EOPNOTSUPP; |
| |
| return set_key(rt2x00dev, &crypto, key); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_set_key); |
| #endif /* CONFIG_RT2X00_LIB_CRYPTO */ |
| |
| void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| const u8 *mac_addr) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| set_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); |
| rt2x00link_stop_tuner(rt2x00dev); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start); |
| |
| void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| clear_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); |
| rt2x00link_start_tuner(rt2x00dev); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete); |
| |
| int rt2x00mac_get_stats(struct ieee80211_hw *hw, |
| struct ieee80211_low_level_stats *stats) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| |
| /* |
| * The dot11ACKFailureCount, dot11RTSFailureCount and |
| * dot11RTSSuccessCount are updated in interrupt time. |
| * dot11FCSErrorCount is updated in the link tuner. |
| */ |
| memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats)); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_get_stats); |
| |
| void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_bss_conf *bss_conf, |
| u32 changes) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct rt2x00_intf *intf = vif_to_intf(vif); |
| |
| /* |
| * mac80211 might be calling this function while we are trying |
| * to remove the device or perhaps suspending it. |
| */ |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
| return; |
| |
| /* |
| * Update the BSSID. |
| */ |
| if (changes & BSS_CHANGED_BSSID) |
| rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL, |
| bss_conf->bssid); |
| |
| /* |
| * Start/stop beaconing. |
| */ |
| if (changes & BSS_CHANGED_BEACON_ENABLED) { |
| mutex_lock(&intf->beacon_skb_mutex); |
| if (!bss_conf->enable_beacon && intf->enable_beacon) { |
| rt2x00dev->intf_beaconing--; |
| intf->enable_beacon = false; |
| |
| if (rt2x00dev->intf_beaconing == 0) { |
| /* |
| * Last beaconing interface disabled |
| * -> stop beacon queue. |
| */ |
| rt2x00queue_stop_queue(rt2x00dev->bcn); |
| } |
| /* |
| * Clear beacon in the H/W for this vif. This is needed |
| * to disable beaconing on this particular interface |
| * and keep it running on other interfaces. |
| */ |
| rt2x00queue_clear_beacon(rt2x00dev, vif); |
| } else if (bss_conf->enable_beacon && !intf->enable_beacon) { |
| rt2x00dev->intf_beaconing++; |
| intf->enable_beacon = true; |
| /* |
| * Upload beacon to the H/W. This is only required on |
| * USB devices. PCI devices fetch beacons periodically. |
| */ |
| if (rt2x00_is_usb(rt2x00dev)) |
| rt2x00queue_update_beacon(rt2x00dev, vif); |
| |
| if (rt2x00dev->intf_beaconing == 1) { |
| /* |
| * First beaconing interface enabled |
| * -> start beacon queue. |
| */ |
| rt2x00queue_start_queue(rt2x00dev->bcn); |
| } |
| } |
| mutex_unlock(&intf->beacon_skb_mutex); |
| } |
| |
| /* |
| * When the association status has changed we must reset the link |
| * tuner counter. This is because some drivers determine if they |
| * should perform link tuning based on the number of seconds |
| * while associated or not associated. |
| */ |
| if (changes & BSS_CHANGED_ASSOC) { |
| rt2x00dev->link.count = 0; |
| |
| if (bss_conf->assoc) |
| rt2x00dev->intf_associated++; |
| else |
| rt2x00dev->intf_associated--; |
| |
| rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); |
| |
| clear_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); |
| } |
| |
| /* |
| * Check for access point which do not support 802.11e . We have to |
| * generate data frames sequence number in S/W for such AP, because |
| * of H/W bug. |
| */ |
| if (changes & BSS_CHANGED_QOS && !bss_conf->qos) |
| set_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); |
| |
| /* |
| * When the erp information has changed, we should perform |
| * additional configuration steps. For all other changes we are done. |
| */ |
| if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE | |
| BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES | |
| BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT)) |
| rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); |
| |
| int rt2x00mac_conf_tx(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, u16 queue_idx, |
| const struct ieee80211_tx_queue_params *params) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct data_queue *queue; |
| |
| queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx); |
| if (unlikely(!queue)) |
| return -EINVAL; |
| |
| /* |
| * The passed variables are stored as real value ((2^n)-1). |
| * Ralink registers require to know the bit number 'n'. |
| */ |
| if (params->cw_min > 0) |
| queue->cw_min = fls(params->cw_min); |
| else |
| queue->cw_min = 5; /* cw_min: 2^5 = 32. */ |
| |
| if (params->cw_max > 0) |
| queue->cw_max = fls(params->cw_max); |
| else |
| queue->cw_max = 10; /* cw_min: 2^10 = 1024. */ |
| |
| queue->aifs = params->aifs; |
| queue->txop = params->txop; |
| |
| rt2x00_dbg(rt2x00dev, |
| "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n", |
| queue_idx, queue->cw_min, queue->cw_max, queue->aifs, |
| queue->txop); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx); |
| |
| void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev); |
| |
| wiphy_rfkill_set_hw_state(hw->wiphy, !active); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll); |
| |
| void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
| u32 queues, bool drop) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct data_queue *queue; |
| |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
| return; |
| |
| tx_queue_for_each(rt2x00dev, queue) |
| rt2x00queue_flush_queue(queue, drop); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_flush); |
| |
| int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct link_ant *ant = &rt2x00dev->link.ant; |
| struct antenna_setup *def = &rt2x00dev->default_ant; |
| struct antenna_setup setup; |
| |
| // The antenna value is not supposed to be 0, |
| // or exceed the maximum number of antenna's. |
| if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3)) |
| return -EINVAL; |
| |
| // When the client tried to configure the antenna to or from |
| // diversity mode, we must reset the default antenna as well |
| // as that controls the diversity switch. |
| if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3) |
| ant->flags &= ~ANTENNA_TX_DIVERSITY; |
| if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3) |
| ant->flags &= ~ANTENNA_RX_DIVERSITY; |
| |
| // If diversity is being enabled, check if we need hardware |
| // or software diversity. In the latter case, reset the value, |
| // and make sure we update the antenna flags to have the |
| // link tuner pick up the diversity tuning. |
| if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) { |
| tx_ant = ANTENNA_SW_DIVERSITY; |
| ant->flags |= ANTENNA_TX_DIVERSITY; |
| } |
| |
| if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) { |
| rx_ant = ANTENNA_SW_DIVERSITY; |
| ant->flags |= ANTENNA_RX_DIVERSITY; |
| } |
| |
| setup.tx = tx_ant; |
| setup.rx = rx_ant; |
| setup.rx_chain_num = 0; |
| setup.tx_chain_num = 0; |
| |
| rt2x00lib_config_antenna(rt2x00dev, setup); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna); |
| |
| int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct link_ant *ant = &rt2x00dev->link.ant; |
| struct antenna_setup *active = &rt2x00dev->link.ant.active; |
| |
| // When software diversity is active, we must report this to the |
| // client and not the current active antenna state. |
| if (ant->flags & ANTENNA_TX_DIVERSITY) |
| *tx_ant = ANTENNA_HW_DIVERSITY; |
| else |
| *tx_ant = active->tx; |
| |
| if (ant->flags & ANTENNA_RX_DIVERSITY) |
| *rx_ant = ANTENNA_HW_DIVERSITY; |
| else |
| *rx_ant = active->rx; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna); |
| |
| void rt2x00mac_get_ringparam(struct ieee80211_hw *hw, |
| u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct data_queue *queue; |
| |
| tx_queue_for_each(rt2x00dev, queue) { |
| *tx += queue->length; |
| *tx_max += queue->limit; |
| } |
| |
| *rx = rt2x00dev->rx->length; |
| *rx_max = rt2x00dev->rx->limit; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam); |
| |
| bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw) |
| { |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| struct data_queue *queue; |
| |
| tx_queue_for_each(rt2x00dev, queue) { |
| if (!rt2x00queue_empty(queue)) |
| return true; |
| } |
| |
| return false; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending); |