1 /* 2 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org> 3 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 7 * as published by the Free Software Foundation 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 15 #include "mt7601u.h" 16 #include "mac.h" 17 #include <linux/etherdevice.h> 18 #include <linux/version.h> 19 20 static int mt7601u_start(struct ieee80211_hw *hw) 21 { 22 struct mt7601u_dev *dev = hw->priv; 23 int ret; 24 25 mutex_lock(&dev->mutex); 26 27 ret = mt7601u_mac_start(dev); 28 if (ret) 29 goto out; 30 31 ieee80211_queue_delayed_work(dev->hw, &dev->mac_work, 32 MT_CALIBRATE_INTERVAL); 33 ieee80211_queue_delayed_work(dev->hw, &dev->cal_work, 34 MT_CALIBRATE_INTERVAL); 35 out: 36 mutex_unlock(&dev->mutex); 37 return ret; 38 } 39 40 static void mt7601u_stop(struct ieee80211_hw *hw) 41 { 42 struct mt7601u_dev *dev = hw->priv; 43 44 mutex_lock(&dev->mutex); 45 46 cancel_delayed_work_sync(&dev->cal_work); 47 cancel_delayed_work_sync(&dev->mac_work); 48 mt7601u_mac_stop(dev); 49 50 mutex_unlock(&dev->mutex); 51 } 52 53 static int mt7601u_add_interface(struct ieee80211_hw *hw, 54 struct ieee80211_vif *vif) 55 { 56 struct mt7601u_dev *dev = hw->priv; 57 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv; 58 unsigned int idx = 0; 59 unsigned int wcid = GROUP_WCID(idx); 60 61 /* Note: for AP do the AP-STA things mt76 does: 62 * - beacon offsets 63 * - do mac address tricks 64 * - shift vif idx 65 */ 66 mvif->idx = idx; 67 68 if (dev->wcid_mask[wcid / BITS_PER_LONG] & BIT(wcid % BITS_PER_LONG)) 69 return -ENOSPC; 70 dev->wcid_mask[wcid / BITS_PER_LONG] |= BIT(wcid % BITS_PER_LONG); 71 mvif->group_wcid.idx = wcid; 72 mvif->group_wcid.hw_key_idx = -1; 73 74 return 0; 75 } 76 77 static void mt7601u_remove_interface(struct ieee80211_hw *hw, 78 struct ieee80211_vif *vif) 79 { 80 struct mt7601u_dev *dev = hw->priv; 81 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv; 82 unsigned int wcid = mvif->group_wcid.idx; 83 84 dev->wcid_mask[wcid / BITS_PER_LONG] &= ~BIT(wcid % BITS_PER_LONG); 85 } 86 87 static int mt7601u_config(struct ieee80211_hw *hw, u32 changed) 88 { 89 struct mt7601u_dev *dev = hw->priv; 90 int ret = 0; 91 92 mutex_lock(&dev->mutex); 93 94 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { 95 ieee80211_stop_queues(hw); 96 ret = mt7601u_phy_set_channel(dev, &hw->conf.chandef); 97 ieee80211_wake_queues(hw); 98 } 99 100 mutex_unlock(&dev->mutex); 101 102 return ret; 103 } 104 105 static void 106 mt76_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, 107 unsigned int *total_flags, u64 multicast) 108 { 109 struct mt7601u_dev *dev = hw->priv; 110 u32 flags = 0; 111 112 #define MT76_FILTER(_flag, _hw) do { \ 113 flags |= *total_flags & FIF_##_flag; \ 114 dev->rxfilter &= ~(_hw); \ 115 dev->rxfilter |= !(flags & FIF_##_flag) * (_hw); \ 116 } while (0) 117 118 mutex_lock(&dev->mutex); 119 120 dev->rxfilter &= ~MT_RX_FILTR_CFG_OTHER_BSS; 121 122 MT76_FILTER(OTHER_BSS, MT_RX_FILTR_CFG_PROMISC); 123 MT76_FILTER(FCSFAIL, MT_RX_FILTR_CFG_CRC_ERR); 124 MT76_FILTER(PLCPFAIL, MT_RX_FILTR_CFG_PHY_ERR); 125 MT76_FILTER(CONTROL, MT_RX_FILTR_CFG_ACK | 126 MT_RX_FILTR_CFG_CTS | 127 MT_RX_FILTR_CFG_CFEND | 128 MT_RX_FILTR_CFG_CFACK | 129 MT_RX_FILTR_CFG_BA | 130 MT_RX_FILTR_CFG_CTRL_RSV); 131 MT76_FILTER(PSPOLL, MT_RX_FILTR_CFG_PSPOLL); 132 133 *total_flags = flags; 134 mt76_wr(dev, MT_RX_FILTR_CFG, dev->rxfilter); 135 136 mutex_unlock(&dev->mutex); 137 } 138 139 static void 140 mt7601u_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 141 struct ieee80211_bss_conf *info, u32 changed) 142 { 143 struct mt7601u_dev *dev = hw->priv; 144 145 mutex_lock(&dev->mutex); 146 147 if (changed & BSS_CHANGED_ASSOC) 148 mt7601u_phy_con_cal_onoff(dev, info); 149 150 if (changed & BSS_CHANGED_BSSID) { 151 mt7601u_addr_wr(dev, MT_MAC_BSSID_DW0, info->bssid); 152 153 /* Note: this is a hack because beacon_int is not changed 154 * on leave nor is any more appropriate event generated. 155 * rt2x00 doesn't seem to be bothered though. 156 */ 157 if (is_zero_ether_addr(info->bssid)) 158 mt7601u_mac_config_tsf(dev, false, 0); 159 } 160 161 if (changed & BSS_CHANGED_BASIC_RATES) { 162 mt7601u_wr(dev, MT_LEGACY_BASIC_RATE, info->basic_rates); 163 mt7601u_wr(dev, MT_HT_FBK_CFG0, 0x65432100); 164 mt7601u_wr(dev, MT_HT_FBK_CFG1, 0xedcba980); 165 mt7601u_wr(dev, MT_LG_FBK_CFG0, 0xedcba988); 166 mt7601u_wr(dev, MT_LG_FBK_CFG1, 0x00002100); 167 } 168 169 if (changed & BSS_CHANGED_BEACON_INT) 170 mt7601u_mac_config_tsf(dev, true, info->beacon_int); 171 172 if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT) 173 mt7601u_mac_set_protection(dev, info->use_cts_prot, 174 info->ht_operation_mode); 175 176 if (changed & BSS_CHANGED_ERP_PREAMBLE) 177 mt7601u_mac_set_short_preamble(dev, info->use_short_preamble); 178 179 if (changed & BSS_CHANGED_ERP_SLOT) { 180 int slottime = info->use_short_slot ? 9 : 20; 181 182 mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG, 183 MT_BKOFF_SLOT_CFG_SLOTTIME, slottime); 184 } 185 186 if (changed & BSS_CHANGED_ASSOC) 187 mt7601u_phy_recalibrate_after_assoc(dev); 188 189 mutex_unlock(&dev->mutex); 190 } 191 192 static int 193 mt76_wcid_alloc(struct mt7601u_dev *dev) 194 { 195 int i, idx = 0; 196 197 for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) { 198 idx = ffs(~dev->wcid_mask[i]); 199 if (!idx) 200 continue; 201 202 idx--; 203 dev->wcid_mask[i] |= BIT(idx); 204 break; 205 } 206 207 idx = i * BITS_PER_LONG + idx; 208 if (idx > 119) 209 return -1; 210 211 return idx; 212 } 213 214 static int 215 mt7601u_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 216 struct ieee80211_sta *sta) 217 { 218 struct mt7601u_dev *dev = hw->priv; 219 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv; 220 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv; 221 int ret = 0; 222 int idx = 0; 223 224 mutex_lock(&dev->mutex); 225 226 idx = mt76_wcid_alloc(dev); 227 if (idx < 0) { 228 ret = -ENOSPC; 229 goto out; 230 } 231 232 msta->wcid.idx = idx; 233 msta->wcid.hw_key_idx = -1; 234 mt7601u_mac_wcid_setup(dev, idx, mvif->idx, sta->addr); 235 mt76_clear(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx)); 236 rcu_assign_pointer(dev->wcid[idx], &msta->wcid); 237 mt7601u_mac_set_ampdu_factor(dev); 238 239 out: 240 mutex_unlock(&dev->mutex); 241 242 return ret; 243 } 244 245 static int 246 mt7601u_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 247 struct ieee80211_sta *sta) 248 { 249 struct mt7601u_dev *dev = hw->priv; 250 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv; 251 int idx = msta->wcid.idx; 252 253 mutex_lock(&dev->mutex); 254 rcu_assign_pointer(dev->wcid[idx], NULL); 255 mt76_set(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx)); 256 dev->wcid_mask[idx / BITS_PER_LONG] &= ~BIT(idx % BITS_PER_LONG); 257 mt7601u_mac_wcid_setup(dev, idx, 0, NULL); 258 mt7601u_mac_set_ampdu_factor(dev); 259 mutex_unlock(&dev->mutex); 260 261 return 0; 262 } 263 264 static void 265 mt7601u_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 266 enum sta_notify_cmd cmd, struct ieee80211_sta *sta) 267 { 268 } 269 270 static void 271 mt7601u_sw_scan(struct ieee80211_hw *hw, 272 struct ieee80211_vif *vif, 273 const u8 *mac_addr) 274 { 275 struct mt7601u_dev *dev = hw->priv; 276 277 mt7601u_agc_save(dev); 278 set_bit(MT7601U_STATE_SCANNING, &dev->state); 279 } 280 281 static void 282 mt7601u_sw_scan_complete(struct ieee80211_hw *hw, 283 struct ieee80211_vif *vif) 284 { 285 struct mt7601u_dev *dev = hw->priv; 286 287 mt7601u_agc_restore(dev); 288 clear_bit(MT7601U_STATE_SCANNING, &dev->state); 289 } 290 291 static int 292 mt7601u_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 293 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 294 struct ieee80211_key_conf *key) 295 { 296 struct mt7601u_dev *dev = hw->priv; 297 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv; 298 struct mt76_sta *msta = sta ? (struct mt76_sta *) sta->drv_priv : NULL; 299 struct mt76_wcid *wcid = msta ? &msta->wcid : &mvif->group_wcid; 300 int idx = key->keyidx; 301 int ret; 302 303 if (cmd == SET_KEY) { 304 key->hw_key_idx = wcid->idx; 305 wcid->hw_key_idx = idx; 306 } else { 307 if (idx == wcid->hw_key_idx) 308 wcid->hw_key_idx = -1; 309 310 key = NULL; 311 } 312 313 if (!msta) { 314 if (key || wcid->hw_key_idx == idx) { 315 ret = mt76_mac_wcid_set_key(dev, wcid->idx, key); 316 if (ret) 317 return ret; 318 } 319 320 return mt76_mac_shared_key_setup(dev, mvif->idx, idx, key); 321 } 322 323 return mt76_mac_wcid_set_key(dev, msta->wcid.idx, key); 324 } 325 326 static int mt7601u_set_rts_threshold(struct ieee80211_hw *hw, u32 value) 327 { 328 struct mt7601u_dev *dev = hw->priv; 329 330 mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, value); 331 332 return 0; 333 } 334 335 static int 336 mt76_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 337 enum ieee80211_ampdu_mlme_action action, 338 struct ieee80211_sta *sta, u16 tid, u16 *ssn, u8 buf_size) 339 { 340 struct mt7601u_dev *dev = hw->priv; 341 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv; 342 343 WARN_ON(msta->wcid.idx > GROUP_WCID(0)); 344 345 switch (action) { 346 case IEEE80211_AMPDU_RX_START: 347 mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid)); 348 break; 349 case IEEE80211_AMPDU_RX_STOP: 350 mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, 351 BIT(16 + tid)); 352 break; 353 case IEEE80211_AMPDU_TX_OPERATIONAL: 354 ieee80211_send_bar(vif, sta->addr, tid, msta->agg_ssn[tid]); 355 break; 356 case IEEE80211_AMPDU_TX_STOP_FLUSH: 357 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 358 break; 359 case IEEE80211_AMPDU_TX_START: 360 msta->agg_ssn[tid] = *ssn << 4; 361 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 362 break; 363 case IEEE80211_AMPDU_TX_STOP_CONT: 364 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 365 break; 366 } 367 368 return 0; 369 } 370 371 static void 372 mt76_sta_rate_tbl_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 373 struct ieee80211_sta *sta) 374 { 375 struct mt7601u_dev *dev = hw->priv; 376 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv; 377 struct ieee80211_sta_rates *rates; 378 struct ieee80211_tx_rate rate = {}; 379 380 rcu_read_lock(); 381 rates = rcu_dereference(sta->rates); 382 383 if (!rates) 384 goto out; 385 386 rate.idx = rates->rate[0].idx; 387 rate.flags = rates->rate[0].flags; 388 mt76_mac_wcid_set_rate(dev, &msta->wcid, &rate); 389 390 out: 391 rcu_read_unlock(); 392 } 393 394 const struct ieee80211_ops mt7601u_ops = { 395 .tx = mt7601u_tx, 396 .start = mt7601u_start, 397 .stop = mt7601u_stop, 398 .add_interface = mt7601u_add_interface, 399 .remove_interface = mt7601u_remove_interface, 400 .config = mt7601u_config, 401 .configure_filter = mt76_configure_filter, 402 .bss_info_changed = mt7601u_bss_info_changed, 403 .sta_add = mt7601u_sta_add, 404 .sta_remove = mt7601u_sta_remove, 405 .sta_notify = mt7601u_sta_notify, 406 .set_key = mt7601u_set_key, 407 .conf_tx = mt7601u_conf_tx, 408 .sw_scan_start = mt7601u_sw_scan, 409 .sw_scan_complete = mt7601u_sw_scan_complete, 410 .ampdu_action = mt76_ampdu_action, 411 .sta_rate_tbl_update = mt76_sta_rate_tbl_update, 412 .set_rts_threshold = mt7601u_set_rts_threshold, 413 }; 414