diff options
Diffstat (limited to 'drivers/net/wireless/ralink/rt2x00/rt2x00mac.c')
| -rw-r--r-- | drivers/net/wireless/ralink/rt2x00/rt2x00mac.c | 827 |
1 files changed, 827 insertions, 0 deletions
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00mac.c b/drivers/net/wireless/ralink/rt2x00/rt2x00mac.c new file mode 100644 index 000000000..4202c6517 --- /dev/null +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00mac.c @@ -0,0 +1,827 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> + <http://rt2x00.serialmonkey.com> + + */ + +/* + 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; + + if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) { + /* + * This is special case for ieee80211_restart_hw(), otherwise + * mac80211 never call start() two times in row without stop(); + */ + set_bit(DEVICE_STATE_RESET, &rt2x00dev->flags); + rt2x00dev->ops->lib->pre_reset_hw(rt2x00dev); + rt2x00lib_stop(rt2x00dev); + } + 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); + +void +rt2x00mac_reconfig_complete(struct ieee80211_hw *hw, + enum ieee80211_reconfig_type reconfig_type) +{ + struct rt2x00_dev *rt2x00dev = hw->priv; + + if (reconfig_type == IEEE80211_RECONFIG_TYPE_RESTART) + clear_bit(DEVICE_STATE_RESET, &rt2x00dev->flags); +} +EXPORT_SYMBOL_GPL(rt2x00mac_reconfig_complete); + +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 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) + 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; + + /* The hardware can't do MFP */ + if (!rt2x00_has_cap_hw_crypto(rt2x00dev) || (sta && sta->mfp)) + 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, + u64 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 (vif->cfg.assoc) + rt2x00dev->intf_associated++; + else + rt2x00dev->intf_associated--; + + rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); + } + + /* + * 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, + unsigned int link_id, 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; + + set_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags); + + tx_queue_for_each(rt2x00dev, queue) + rt2x00queue_flush_queue(queue, drop); + + clear_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags); +} +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); |