--- /dev/null
+/*
+ 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)
+ goto exit_fail;
+
+ if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb))
+ goto exit_fail;
+ }
+
+ if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false)))
+ goto exit_fail;
+
+ /*
+ * Pausing queue has to be serialized with rt2x00lib_txdone(). Note
+ * we should not use spin_lock_bh variant as bottom halve was already
+ * disabled before ieee80211_xmit() call.
+ */
+ spin_lock(&queue->tx_lock);
+ if (rt2x00queue_threshold(queue))
+ rt2x00queue_pause_queue(queue);
+ spin_unlock(&queue->tx_lock);
+
+ return;
+
+ exit_fail:
+ spin_lock(&queue->tx_lock);
+ rt2x00queue_pause_queue(queue);
+ spin_unlock(&queue->tx_lock);
+ 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);
+
+ /*
+ * 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);
+
+ /* 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 |
+ FIF_PROMISC_IN_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 (*total_flags & FIF_OTHER_BSS ||
+ *total_flags & FIF_PROMISC_IN_BSS)
+ *total_flags |= FIF_PROMISC_IN_BSS | FIF_OTHER_BSS;
+
+ /*
+ * 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;
+ }
+
+ /*
+ * Check if there is any work left for us.
+ */
+ if (rt2x00dev->packet_filter == *total_flags)
+ return;
+ 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 */
+
+int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta)
+{
+ struct rt2x00_dev *rt2x00dev = hw->priv;
+ struct rt2x00_sta *sta_priv = sta_to_rt2x00_sta(sta);
+
+ /*
+ * If there's no space left in the device table store
+ * -1 as wcid but tell mac80211 everything went ok.
+ */
+ if (rt2x00dev->ops->lib->sta_add(rt2x00dev, vif, sta))
+ sta_priv->wcid = -1;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00mac_sta_add);
+
+int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta)
+{
+ struct rt2x00_dev *rt2x00dev = hw->priv;
+ struct rt2x00_sta *sta_priv = sta_to_rt2x00_sta(sta);
+
+ /*
+ * If we never sent the STA to the device no need to clean it up.
+ */
+ if (sta_priv->wcid < 0)
+ return 0;
+
+ return rt2x00dev->ops->lib->sta_remove(rt2x00dev, sta_priv->wcid);
+}
+EXPORT_SYMBOL_GPL(rt2x00mac_sta_remove);
+
+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);
Code Review / kvmfornfv.git / blobdiff