416 lines
10 KiB
C
416 lines
10 KiB
C
/*
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* Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
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* Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "mt7601u.h"
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#include "mac.h"
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#include <linux/etherdevice.h>
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static int mt7601u_start(struct ieee80211_hw *hw)
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{
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struct mt7601u_dev *dev = hw->priv;
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int ret;
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mutex_lock(&dev->mutex);
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ret = mt7601u_mac_start(dev);
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if (ret)
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goto out;
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ieee80211_queue_delayed_work(dev->hw, &dev->mac_work,
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MT_CALIBRATE_INTERVAL);
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ieee80211_queue_delayed_work(dev->hw, &dev->cal_work,
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MT_CALIBRATE_INTERVAL);
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out:
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mutex_unlock(&dev->mutex);
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return ret;
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}
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static void mt7601u_stop(struct ieee80211_hw *hw)
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{
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struct mt7601u_dev *dev = hw->priv;
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mutex_lock(&dev->mutex);
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cancel_delayed_work_sync(&dev->cal_work);
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cancel_delayed_work_sync(&dev->mac_work);
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mt7601u_mac_stop(dev);
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mutex_unlock(&dev->mutex);
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}
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static int mt7601u_add_interface(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif)
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{
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struct mt7601u_dev *dev = hw->priv;
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struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
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unsigned int idx = 0;
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unsigned int wcid = GROUP_WCID(idx);
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/* Note: for AP do the AP-STA things mt76 does:
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* - beacon offsets
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* - do mac address tricks
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* - shift vif idx
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*/
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mvif->idx = idx;
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if (dev->wcid_mask[wcid / BITS_PER_LONG] & BIT(wcid % BITS_PER_LONG))
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return -ENOSPC;
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dev->wcid_mask[wcid / BITS_PER_LONG] |= BIT(wcid % BITS_PER_LONG);
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mvif->group_wcid.idx = wcid;
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mvif->group_wcid.hw_key_idx = -1;
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return 0;
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}
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static void mt7601u_remove_interface(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif)
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{
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struct mt7601u_dev *dev = hw->priv;
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struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
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unsigned int wcid = mvif->group_wcid.idx;
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dev->wcid_mask[wcid / BITS_PER_LONG] &= ~BIT(wcid % BITS_PER_LONG);
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}
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static int mt7601u_config(struct ieee80211_hw *hw, u32 changed)
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{
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struct mt7601u_dev *dev = hw->priv;
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int ret = 0;
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mutex_lock(&dev->mutex);
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if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
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ieee80211_stop_queues(hw);
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ret = mt7601u_phy_set_channel(dev, &hw->conf.chandef);
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ieee80211_wake_queues(hw);
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}
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mutex_unlock(&dev->mutex);
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return ret;
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}
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static void
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mt76_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
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unsigned int *total_flags, u64 multicast)
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{
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struct mt7601u_dev *dev = hw->priv;
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u32 flags = 0;
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#define MT76_FILTER(_flag, _hw) do { \
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flags |= *total_flags & FIF_##_flag; \
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dev->rxfilter &= ~(_hw); \
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dev->rxfilter |= !(flags & FIF_##_flag) * (_hw); \
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} while (0)
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mutex_lock(&dev->mutex);
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dev->rxfilter &= ~MT_RX_FILTR_CFG_OTHER_BSS;
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MT76_FILTER(OTHER_BSS, MT_RX_FILTR_CFG_PROMISC);
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MT76_FILTER(FCSFAIL, MT_RX_FILTR_CFG_CRC_ERR);
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MT76_FILTER(PLCPFAIL, MT_RX_FILTR_CFG_PHY_ERR);
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MT76_FILTER(CONTROL, MT_RX_FILTR_CFG_ACK |
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MT_RX_FILTR_CFG_CTS |
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MT_RX_FILTR_CFG_CFEND |
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MT_RX_FILTR_CFG_CFACK |
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MT_RX_FILTR_CFG_BA |
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MT_RX_FILTR_CFG_CTRL_RSV);
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MT76_FILTER(PSPOLL, MT_RX_FILTR_CFG_PSPOLL);
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*total_flags = flags;
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mt76_wr(dev, MT_RX_FILTR_CFG, dev->rxfilter);
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mutex_unlock(&dev->mutex);
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}
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static void
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mt7601u_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
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struct ieee80211_bss_conf *info, u32 changed)
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{
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struct mt7601u_dev *dev = hw->priv;
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mutex_lock(&dev->mutex);
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if (changed & BSS_CHANGED_ASSOC)
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mt7601u_phy_con_cal_onoff(dev, info);
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if (changed & BSS_CHANGED_BSSID) {
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mt7601u_addr_wr(dev, MT_MAC_BSSID_DW0, info->bssid);
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/* Note: this is a hack because beacon_int is not changed
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* on leave nor is any more appropriate event generated.
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* rt2x00 doesn't seem to be bothered though.
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*/
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if (is_zero_ether_addr(info->bssid))
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mt7601u_mac_config_tsf(dev, false, 0);
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}
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if (changed & BSS_CHANGED_BASIC_RATES) {
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mt7601u_wr(dev, MT_LEGACY_BASIC_RATE, info->basic_rates);
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mt7601u_wr(dev, MT_HT_FBK_CFG0, 0x65432100);
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mt7601u_wr(dev, MT_HT_FBK_CFG1, 0xedcba980);
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mt7601u_wr(dev, MT_LG_FBK_CFG0, 0xedcba988);
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mt7601u_wr(dev, MT_LG_FBK_CFG1, 0x00002100);
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}
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if (changed & BSS_CHANGED_BEACON_INT)
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mt7601u_mac_config_tsf(dev, true, info->beacon_int);
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if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT)
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mt7601u_mac_set_protection(dev, info->use_cts_prot,
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info->ht_operation_mode);
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if (changed & BSS_CHANGED_ERP_PREAMBLE)
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mt7601u_mac_set_short_preamble(dev, info->use_short_preamble);
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if (changed & BSS_CHANGED_ERP_SLOT) {
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int slottime = info->use_short_slot ? 9 : 20;
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mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG,
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MT_BKOFF_SLOT_CFG_SLOTTIME, slottime);
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}
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if (changed & BSS_CHANGED_ASSOC)
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mt7601u_phy_recalibrate_after_assoc(dev);
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mutex_unlock(&dev->mutex);
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}
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static int
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mt76_wcid_alloc(struct mt7601u_dev *dev)
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{
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int i, idx = 0;
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for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) {
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idx = ffs(~dev->wcid_mask[i]);
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if (!idx)
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continue;
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idx--;
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dev->wcid_mask[i] |= BIT(idx);
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break;
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}
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idx = i * BITS_PER_LONG + idx;
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if (idx > 119)
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return -1;
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return idx;
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}
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static int
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mt7601u_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
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struct ieee80211_sta *sta)
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{
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struct mt7601u_dev *dev = hw->priv;
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struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
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struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
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int ret = 0;
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int idx = 0;
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mutex_lock(&dev->mutex);
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idx = mt76_wcid_alloc(dev);
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if (idx < 0) {
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ret = -ENOSPC;
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goto out;
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}
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msta->wcid.idx = idx;
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msta->wcid.hw_key_idx = -1;
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mt7601u_mac_wcid_setup(dev, idx, mvif->idx, sta->addr);
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mt76_clear(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
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rcu_assign_pointer(dev->wcid[idx], &msta->wcid);
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mt7601u_mac_set_ampdu_factor(dev);
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out:
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mutex_unlock(&dev->mutex);
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return ret;
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}
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static int
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mt7601u_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
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struct ieee80211_sta *sta)
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{
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struct mt7601u_dev *dev = hw->priv;
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struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
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int idx = msta->wcid.idx;
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mutex_lock(&dev->mutex);
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rcu_assign_pointer(dev->wcid[idx], NULL);
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mt76_set(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
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dev->wcid_mask[idx / BITS_PER_LONG] &= ~BIT(idx % BITS_PER_LONG);
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mt7601u_mac_wcid_setup(dev, idx, 0, NULL);
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mt7601u_mac_set_ampdu_factor(dev);
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mutex_unlock(&dev->mutex);
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return 0;
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}
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static void
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mt7601u_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
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enum sta_notify_cmd cmd, struct ieee80211_sta *sta)
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{
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}
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static void
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mt7601u_sw_scan(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif,
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const u8 *mac_addr)
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{
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struct mt7601u_dev *dev = hw->priv;
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mt7601u_agc_save(dev);
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set_bit(MT7601U_STATE_SCANNING, &dev->state);
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}
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static void
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mt7601u_sw_scan_complete(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif)
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{
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struct mt7601u_dev *dev = hw->priv;
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mt7601u_agc_restore(dev);
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clear_bit(MT7601U_STATE_SCANNING, &dev->state);
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}
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static int
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mt7601u_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
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struct ieee80211_vif *vif, struct ieee80211_sta *sta,
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struct ieee80211_key_conf *key)
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{
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struct mt7601u_dev *dev = hw->priv;
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struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
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struct mt76_sta *msta = sta ? (struct mt76_sta *) sta->drv_priv : NULL;
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struct mt76_wcid *wcid = msta ? &msta->wcid : &mvif->group_wcid;
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int idx = key->keyidx;
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int ret;
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if (cmd == SET_KEY) {
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key->hw_key_idx = wcid->idx;
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wcid->hw_key_idx = idx;
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} else {
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if (idx == wcid->hw_key_idx)
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wcid->hw_key_idx = -1;
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key = NULL;
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}
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if (!msta) {
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if (key || wcid->hw_key_idx == idx) {
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ret = mt76_mac_wcid_set_key(dev, wcid->idx, key);
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if (ret)
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return ret;
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}
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return mt76_mac_shared_key_setup(dev, mvif->idx, idx, key);
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}
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return mt76_mac_wcid_set_key(dev, msta->wcid.idx, key);
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}
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static int mt7601u_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
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{
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struct mt7601u_dev *dev = hw->priv;
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mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, value);
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return 0;
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}
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static int
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mt76_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
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struct ieee80211_ampdu_params *params)
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{
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struct mt7601u_dev *dev = hw->priv;
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struct ieee80211_sta *sta = params->sta;
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enum ieee80211_ampdu_mlme_action action = params->action;
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u16 tid = params->tid;
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u16 *ssn = ¶ms->ssn;
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struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
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WARN_ON(msta->wcid.idx > GROUP_WCID(0));
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switch (action) {
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case IEEE80211_AMPDU_RX_START:
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mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
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break;
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case IEEE80211_AMPDU_RX_STOP:
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mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4,
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BIT(16 + tid));
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break;
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case IEEE80211_AMPDU_TX_OPERATIONAL:
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ieee80211_send_bar(vif, sta->addr, tid, msta->agg_ssn[tid]);
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break;
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case IEEE80211_AMPDU_TX_STOP_FLUSH:
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case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
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break;
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case IEEE80211_AMPDU_TX_START:
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msta->agg_ssn[tid] = *ssn << 4;
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ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
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break;
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case IEEE80211_AMPDU_TX_STOP_CONT:
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ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
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break;
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}
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return 0;
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}
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static void
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mt76_sta_rate_tbl_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
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struct ieee80211_sta *sta)
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{
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struct mt7601u_dev *dev = hw->priv;
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struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
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struct ieee80211_sta_rates *rates;
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struct ieee80211_tx_rate rate = {};
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rcu_read_lock();
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rates = rcu_dereference(sta->rates);
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if (!rates)
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goto out;
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rate.idx = rates->rate[0].idx;
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rate.flags = rates->rate[0].flags;
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mt76_mac_wcid_set_rate(dev, &msta->wcid, &rate);
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out:
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rcu_read_unlock();
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}
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const struct ieee80211_ops mt7601u_ops = {
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.tx = mt7601u_tx,
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.start = mt7601u_start,
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.stop = mt7601u_stop,
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.add_interface = mt7601u_add_interface,
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.remove_interface = mt7601u_remove_interface,
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.config = mt7601u_config,
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.configure_filter = mt76_configure_filter,
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.bss_info_changed = mt7601u_bss_info_changed,
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.sta_add = mt7601u_sta_add,
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.sta_remove = mt7601u_sta_remove,
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.sta_notify = mt7601u_sta_notify,
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.set_key = mt7601u_set_key,
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.conf_tx = mt7601u_conf_tx,
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.sw_scan_start = mt7601u_sw_scan,
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.sw_scan_complete = mt7601u_sw_scan_complete,
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.ampdu_action = mt76_ampdu_action,
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.sta_rate_tbl_update = mt76_sta_rate_tbl_update,
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.set_rts_threshold = mt7601u_set_rts_threshold,
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};
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