1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Implementation of mac80211 API. 4 * 5 * Copyright (c) 2017-2020, Silicon Laboratories, Inc. 6 * Copyright (c) 2010, ST-Ericsson 7 */ 8 #include <linux/etherdevice.h> 9 #include <net/mac80211.h> 10 11 #include "sta.h" 12 #include "wfx.h" 13 #include "fwio.h" 14 #include "bh.h" 15 #include "key.h" 16 #include "scan.h" 17 #include "debug.h" 18 #include "hif_tx.h" 19 #include "hif_tx_mib.h" 20 21 #define HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES 2 22 23 u32 wfx_rate_mask_to_hw(struct wfx_dev *wdev, u32 rates) 24 { 25 int i; 26 u32 ret = 0; 27 /* The device only supports 2GHz */ 28 struct ieee80211_supported_band *sband = wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]; 29 30 for (i = 0; i < sband->n_bitrates; i++) { 31 if (rates & BIT(i)) { 32 if (i >= sband->n_bitrates) 33 dev_warn(wdev->dev, "unsupported basic rate\n"); 34 else 35 ret |= BIT(sband->bitrates[i].hw_value); 36 } 37 } 38 return ret; 39 } 40 41 void wfx_cooling_timeout_work(struct work_struct *work) 42 { 43 struct wfx_dev *wdev = container_of(to_delayed_work(work), struct wfx_dev, 44 cooling_timeout_work); 45 46 wdev->chip_frozen = true; 47 wfx_tx_unlock(wdev); 48 } 49 50 void wfx_suspend_hot_dev(struct wfx_dev *wdev, enum sta_notify_cmd cmd) 51 { 52 if (cmd == STA_NOTIFY_AWAKE) { 53 /* Device recover normal temperature */ 54 if (cancel_delayed_work(&wdev->cooling_timeout_work)) 55 wfx_tx_unlock(wdev); 56 } else { 57 /* Device is too hot */ 58 schedule_delayed_work(&wdev->cooling_timeout_work, 10 * HZ); 59 wfx_tx_lock(wdev); 60 } 61 } 62 63 static void wfx_filter_beacon(struct wfx_vif *wvif, bool filter_beacon) 64 { 65 static const struct wfx_hif_ie_table_entry filter_ies[] = { 66 { 67 .ie_id = WLAN_EID_VENDOR_SPECIFIC, 68 .has_changed = 1, 69 .no_longer = 1, 70 .has_appeared = 1, 71 .oui = { 0x50, 0x6F, 0x9A }, 72 }, { 73 .ie_id = WLAN_EID_HT_OPERATION, 74 .has_changed = 1, 75 .no_longer = 1, 76 .has_appeared = 1, 77 }, { 78 .ie_id = WLAN_EID_ERP_INFO, 79 .has_changed = 1, 80 .no_longer = 1, 81 .has_appeared = 1, 82 }, { 83 .ie_id = WLAN_EID_CHANNEL_SWITCH, 84 .has_changed = 1, 85 .no_longer = 1, 86 .has_appeared = 1, 87 } 88 }; 89 90 if (!filter_beacon) { 91 wfx_hif_beacon_filter_control(wvif, 0, 1); 92 } else { 93 wfx_hif_set_beacon_filter_table(wvif, ARRAY_SIZE(filter_ies), filter_ies); 94 wfx_hif_beacon_filter_control(wvif, HIF_BEACON_FILTER_ENABLE, 0); 95 } 96 } 97 98 void wfx_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, 99 unsigned int *total_flags, u64 unused) 100 { 101 bool filter_bssid, filter_prbreq, filter_beacon; 102 struct ieee80211_vif *vif = NULL; 103 struct wfx_dev *wdev = hw->priv; 104 struct wfx_vif *wvif = NULL; 105 106 /* Notes: 107 * - Probe responses (FIF_BCN_PRBRESP_PROMISC) are never filtered 108 * - PS-Poll (FIF_PSPOLL) are never filtered 109 * - RTS, CTS and Ack (FIF_CONTROL) are always filtered 110 * - Broken frames (FIF_FCSFAIL and FIF_PLCPFAIL) are always filtered 111 * - Firmware does (yet) allow to forward unicast traffic sent to other stations (aka. 112 * promiscuous mode) 113 */ 114 *total_flags &= FIF_BCN_PRBRESP_PROMISC | FIF_ALLMULTI | FIF_OTHER_BSS | 115 FIF_PROBE_REQ | FIF_PSPOLL; 116 117 mutex_lock(&wdev->conf_mutex); 118 while ((wvif = wvif_iterate(wdev, wvif)) != NULL) { 119 mutex_lock(&wvif->scan_lock); 120 121 /* Note: FIF_BCN_PRBRESP_PROMISC covers probe response and 122 * beacons from other BSS 123 */ 124 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) 125 filter_beacon = false; 126 else 127 filter_beacon = true; 128 wfx_filter_beacon(wvif, filter_beacon); 129 130 if (*total_flags & FIF_OTHER_BSS) 131 filter_bssid = false; 132 else 133 filter_bssid = true; 134 135 vif = wvif_to_vif(wvif); 136 /* In AP mode, chip can reply to probe request itself */ 137 if (*total_flags & FIF_PROBE_REQ && vif->type == NL80211_IFTYPE_AP) { 138 dev_dbg(wdev->dev, "do not forward probe request in AP mode\n"); 139 *total_flags &= ~FIF_PROBE_REQ; 140 } 141 142 if (*total_flags & FIF_PROBE_REQ) 143 filter_prbreq = false; 144 else 145 filter_prbreq = true; 146 wfx_hif_set_rx_filter(wvif, filter_bssid, filter_prbreq); 147 148 mutex_unlock(&wvif->scan_lock); 149 } 150 mutex_unlock(&wdev->conf_mutex); 151 } 152 153 static int wfx_get_ps_timeout(struct wfx_vif *wvif, bool *enable_ps) 154 { 155 struct ieee80211_channel *chan0 = NULL, *chan1 = NULL; 156 struct ieee80211_conf *conf = &wvif->wdev->hw->conf; 157 struct ieee80211_vif *vif = wvif_to_vif(wvif); 158 159 WARN(!vif->cfg.assoc && enable_ps, 160 "enable_ps is reliable only if associated"); 161 if (wdev_to_wvif(wvif->wdev, 0)) { 162 struct wfx_vif *wvif_ch0 = wdev_to_wvif(wvif->wdev, 0); 163 struct ieee80211_vif *vif_ch0 = wvif_to_vif(wvif_ch0); 164 165 chan0 = vif_ch0->bss_conf.chandef.chan; 166 } 167 if (wdev_to_wvif(wvif->wdev, 1)) { 168 struct wfx_vif *wvif_ch1 = wdev_to_wvif(wvif->wdev, 1); 169 struct ieee80211_vif *vif_ch1 = wvif_to_vif(wvif_ch1); 170 171 chan1 = vif_ch1->bss_conf.chandef.chan; 172 } 173 if (chan0 && chan1 && vif->type != NL80211_IFTYPE_AP) { 174 if (chan0->hw_value == chan1->hw_value) { 175 /* It is useless to enable PS if channels are the same. */ 176 if (enable_ps) 177 *enable_ps = false; 178 if (vif->cfg.assoc && vif->cfg.ps) 179 dev_info(wvif->wdev->dev, "ignoring requested PS mode"); 180 return -1; 181 } 182 /* It is necessary to enable PS if channels are different. */ 183 if (enable_ps) 184 *enable_ps = true; 185 if (wfx_api_older_than(wvif->wdev, 3, 2)) 186 return 0; 187 else 188 return 30; 189 } 190 if (enable_ps) 191 *enable_ps = vif->cfg.ps; 192 if (vif->cfg.assoc && vif->cfg.ps) 193 return conf->dynamic_ps_timeout; 194 else 195 return -1; 196 } 197 198 int wfx_update_pm(struct wfx_vif *wvif) 199 { 200 struct ieee80211_vif *vif = wvif_to_vif(wvif); 201 int ps_timeout; 202 bool ps; 203 204 if (!vif->cfg.assoc) 205 return 0; 206 ps_timeout = wfx_get_ps_timeout(wvif, &ps); 207 if (!ps) 208 ps_timeout = 0; 209 WARN_ON(ps_timeout < 0); 210 if (wvif->uapsd_mask) 211 ps_timeout = 0; 212 213 if (!wait_for_completion_timeout(&wvif->set_pm_mode_complete, TU_TO_JIFFIES(512))) 214 dev_warn(wvif->wdev->dev, "timeout while waiting of set_pm_mode_complete\n"); 215 return wfx_hif_set_pm(wvif, ps, ps_timeout); 216 } 217 218 int wfx_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 219 unsigned int link_id, u16 queue, 220 const struct ieee80211_tx_queue_params *params) 221 { 222 struct wfx_dev *wdev = hw->priv; 223 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 224 int old_uapsd = wvif->uapsd_mask; 225 226 WARN_ON(queue >= hw->queues); 227 228 mutex_lock(&wdev->conf_mutex); 229 assign_bit(queue, &wvif->uapsd_mask, params->uapsd); 230 wfx_hif_set_edca_queue_params(wvif, queue, params); 231 if (vif->type == NL80211_IFTYPE_STATION && 232 old_uapsd != wvif->uapsd_mask) { 233 wfx_hif_set_uapsd_info(wvif, wvif->uapsd_mask); 234 wfx_update_pm(wvif); 235 } 236 mutex_unlock(&wdev->conf_mutex); 237 return 0; 238 } 239 240 int wfx_set_rts_threshold(struct ieee80211_hw *hw, u32 value) 241 { 242 struct wfx_dev *wdev = hw->priv; 243 struct wfx_vif *wvif = NULL; 244 245 while ((wvif = wvif_iterate(wdev, wvif)) != NULL) 246 wfx_hif_rts_threshold(wvif, value); 247 return 0; 248 } 249 250 void wfx_event_report_rssi(struct wfx_vif *wvif, u8 raw_rcpi_rssi) 251 { 252 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 253 * RSSI = RCPI / 2 - 110 254 */ 255 struct ieee80211_vif *vif = wvif_to_vif(wvif); 256 int rcpi_rssi; 257 int cqm_evt; 258 259 rcpi_rssi = raw_rcpi_rssi / 2 - 110; 260 if (rcpi_rssi <= vif->bss_conf.cqm_rssi_thold) 261 cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW; 262 else 263 cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH; 264 ieee80211_cqm_rssi_notify(vif, cqm_evt, rcpi_rssi, GFP_KERNEL); 265 } 266 267 static void wfx_beacon_loss_work(struct work_struct *work) 268 { 269 struct wfx_vif *wvif = container_of(to_delayed_work(work), struct wfx_vif, 270 beacon_loss_work); 271 struct ieee80211_vif *vif = wvif_to_vif(wvif); 272 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; 273 274 ieee80211_beacon_loss(vif); 275 schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(bss_conf->beacon_int)); 276 } 277 278 void wfx_set_default_unicast_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif, int idx) 279 { 280 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 281 282 wfx_hif_wep_default_key_id(wvif, idx); 283 } 284 285 void wfx_reset(struct wfx_vif *wvif) 286 { 287 struct wfx_dev *wdev = wvif->wdev; 288 289 wfx_tx_lock_flush(wdev); 290 wfx_hif_reset(wvif, false); 291 wfx_tx_policy_init(wvif); 292 if (wvif_count(wdev) <= 1) 293 wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF); 294 wfx_tx_unlock(wdev); 295 wvif->join_in_progress = false; 296 cancel_delayed_work_sync(&wvif->beacon_loss_work); 297 wvif = NULL; 298 while ((wvif = wvif_iterate(wdev, wvif)) != NULL) 299 wfx_update_pm(wvif); 300 } 301 302 int wfx_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) 303 { 304 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 305 struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *)&sta->drv_priv; 306 307 sta_priv->vif_id = wvif->id; 308 309 if (vif->type == NL80211_IFTYPE_STATION) 310 wfx_hif_set_mfp(wvif, sta->mfp, sta->mfp); 311 312 /* In station mode, the firmware interprets new link-id as a TDLS peer */ 313 if (vif->type == NL80211_IFTYPE_STATION && !sta->tdls) 314 return 0; 315 sta_priv->link_id = ffz(wvif->link_id_map); 316 wvif->link_id_map |= BIT(sta_priv->link_id); 317 WARN_ON(!sta_priv->link_id); 318 WARN_ON(sta_priv->link_id >= HIF_LINK_ID_MAX); 319 wfx_hif_map_link(wvif, false, sta->addr, sta_priv->link_id, sta->mfp); 320 321 return 0; 322 } 323 324 int wfx_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) 325 { 326 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 327 struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *)&sta->drv_priv; 328 329 /* See note in wfx_sta_add() */ 330 if (!sta_priv->link_id) 331 return 0; 332 /* FIXME add a mutex? */ 333 wfx_hif_map_link(wvif, true, sta->addr, sta_priv->link_id, false); 334 wvif->link_id_map &= ~BIT(sta_priv->link_id); 335 return 0; 336 } 337 338 static int wfx_upload_ap_templates(struct wfx_vif *wvif) 339 { 340 struct ieee80211_vif *vif = wvif_to_vif(wvif); 341 struct sk_buff *skb; 342 343 skb = ieee80211_beacon_get(wvif->wdev->hw, vif, 0); 344 if (!skb) 345 return -ENOMEM; 346 wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_BCN, API_RATE_INDEX_B_1MBPS); 347 dev_kfree_skb(skb); 348 349 skb = ieee80211_proberesp_get(wvif->wdev->hw, vif); 350 if (!skb) 351 return -ENOMEM; 352 wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_PRBRES, API_RATE_INDEX_B_1MBPS); 353 dev_kfree_skb(skb); 354 return 0; 355 } 356 357 static void wfx_set_mfp_ap(struct wfx_vif *wvif) 358 { 359 struct ieee80211_vif *vif = wvif_to_vif(wvif); 360 struct sk_buff *skb = ieee80211_beacon_get(wvif->wdev->hw, vif, 0); 361 const int ieoffset = offsetof(struct ieee80211_mgmt, u.beacon.variable); 362 const u16 *ptr = (u16 *)cfg80211_find_ie(WLAN_EID_RSN, skb->data + ieoffset, 363 skb->len - ieoffset); 364 const int pairwise_cipher_suite_count_offset = 8 / sizeof(u16); 365 const int pairwise_cipher_suite_size = 4 / sizeof(u16); 366 const int akm_suite_size = 4 / sizeof(u16); 367 368 if (ptr) { 369 ptr += pairwise_cipher_suite_count_offset; 370 if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb))) 371 return; 372 ptr += 1 + pairwise_cipher_suite_size * *ptr; 373 if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb))) 374 return; 375 ptr += 1 + akm_suite_size * *ptr; 376 if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb))) 377 return; 378 wfx_hif_set_mfp(wvif, *ptr & BIT(7), *ptr & BIT(6)); 379 } 380 } 381 382 int wfx_start_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 383 struct ieee80211_bss_conf *link_conf) 384 { 385 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 386 struct wfx_dev *wdev = wvif->wdev; 387 int ret; 388 389 wvif = NULL; 390 while ((wvif = wvif_iterate(wdev, wvif)) != NULL) 391 wfx_update_pm(wvif); 392 wvif = (struct wfx_vif *)vif->drv_priv; 393 wfx_upload_ap_templates(wvif); 394 ret = wfx_hif_start(wvif, &vif->bss_conf, wvif->channel); 395 if (ret > 0) 396 return -EIO; 397 wfx_set_mfp_ap(wvif); 398 return ret; 399 } 400 401 void wfx_stop_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 402 struct ieee80211_bss_conf *link_conf) 403 { 404 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 405 406 wfx_reset(wvif); 407 } 408 409 static void wfx_join(struct wfx_vif *wvif) 410 { 411 struct ieee80211_vif *vif = wvif_to_vif(wvif); 412 struct ieee80211_bss_conf *conf = &vif->bss_conf; 413 struct cfg80211_bss *bss = NULL; 414 u8 ssid[IEEE80211_MAX_SSID_LEN]; 415 const u8 *ssid_ie = NULL; 416 int ssid_len = 0; 417 int ret; 418 419 wfx_tx_lock_flush(wvif->wdev); 420 421 bss = cfg80211_get_bss(wvif->wdev->hw->wiphy, wvif->channel, conf->bssid, NULL, 0, 422 IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY); 423 if (!bss && !vif->cfg.ibss_joined) { 424 wfx_tx_unlock(wvif->wdev); 425 return; 426 } 427 428 rcu_read_lock(); /* protect ssid_ie */ 429 if (bss) 430 ssid_ie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID); 431 if (ssid_ie) { 432 ssid_len = ssid_ie[1]; 433 if (ssid_len > IEEE80211_MAX_SSID_LEN) 434 ssid_len = IEEE80211_MAX_SSID_LEN; 435 memcpy(ssid, &ssid_ie[2], ssid_len); 436 } 437 rcu_read_unlock(); 438 439 cfg80211_put_bss(wvif->wdev->hw->wiphy, bss); 440 441 wvif->join_in_progress = true; 442 ret = wfx_hif_join(wvif, conf, wvif->channel, ssid, ssid_len); 443 if (ret) { 444 ieee80211_connection_loss(vif); 445 wfx_reset(wvif); 446 } else { 447 /* Due to beacon filtering it is possible that the AP's beacon is not known for the 448 * mac80211 stack. Disable filtering temporary to make sure the stack receives at 449 * least one 450 */ 451 wfx_filter_beacon(wvif, false); 452 } 453 wfx_tx_unlock(wvif->wdev); 454 } 455 456 static void wfx_join_finalize(struct wfx_vif *wvif, struct ieee80211_bss_conf *info) 457 { 458 struct ieee80211_vif *vif = wvif_to_vif(wvif); 459 struct ieee80211_sta *sta = NULL; 460 int ampdu_density = 0; 461 bool greenfield = false; 462 463 rcu_read_lock(); /* protect sta */ 464 if (info->bssid && !vif->cfg.ibss_joined) 465 sta = ieee80211_find_sta(vif, info->bssid); 466 if (sta && sta->deflink.ht_cap.ht_supported) 467 ampdu_density = sta->deflink.ht_cap.ampdu_density; 468 if (sta && sta->deflink.ht_cap.ht_supported && 469 !(info->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)) 470 greenfield = !!(sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD); 471 rcu_read_unlock(); 472 473 wvif->join_in_progress = false; 474 wfx_hif_set_association_mode(wvif, ampdu_density, greenfield, info->use_short_preamble); 475 wfx_hif_keep_alive_period(wvif, 0); 476 /* beacon_loss_count is defined to 7 in net/mac80211/mlme.c. Let's use the same value. */ 477 wfx_hif_set_bss_params(wvif, vif->cfg.aid, 7); 478 wfx_hif_set_beacon_wakeup_period(wvif, 1, 1); 479 wfx_update_pm(wvif); 480 } 481 482 int wfx_join_ibss(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 483 { 484 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 485 486 wfx_upload_ap_templates(wvif); 487 wfx_join(wvif); 488 return 0; 489 } 490 491 void wfx_leave_ibss(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 492 { 493 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 494 495 wfx_reset(wvif); 496 } 497 498 static void wfx_enable_beacon(struct wfx_vif *wvif, bool enable) 499 { 500 /* Driver has Content After DTIM Beacon in queue. Driver is waiting for a signal from the 501 * firmware. Since we are going to stop to send beacons, this signal will never happens. See 502 * also wfx_suspend_resume_mc() 503 */ 504 if (!enable && wfx_tx_queues_has_cab(wvif)) { 505 wvif->after_dtim_tx_allowed = true; 506 wfx_bh_request_tx(wvif->wdev); 507 } 508 wfx_hif_beacon_transmit(wvif, enable); 509 } 510 511 void wfx_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 512 struct ieee80211_bss_conf *info, u64 changed) 513 { 514 struct wfx_dev *wdev = hw->priv; 515 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 516 int i; 517 518 mutex_lock(&wdev->conf_mutex); 519 520 if (changed & BSS_CHANGED_BASIC_RATES || 521 changed & BSS_CHANGED_BEACON_INT || 522 changed & BSS_CHANGED_BSSID) { 523 if (vif->type == NL80211_IFTYPE_STATION) 524 wfx_join(wvif); 525 } 526 527 if (changed & BSS_CHANGED_ASSOC) { 528 if (vif->cfg.assoc || vif->cfg.ibss_joined) 529 wfx_join_finalize(wvif, info); 530 else if (!vif->cfg.assoc && vif->type == NL80211_IFTYPE_STATION) 531 wfx_reset(wvif); 532 else 533 dev_warn(wdev->dev, "misunderstood change: ASSOC\n"); 534 } 535 536 if (changed & BSS_CHANGED_BEACON_INFO) { 537 if (vif->type != NL80211_IFTYPE_STATION) 538 dev_warn(wdev->dev, "misunderstood change: BEACON_INFO\n"); 539 wfx_hif_set_beacon_wakeup_period(wvif, info->dtim_period, info->dtim_period); 540 /* We temporary forwarded beacon for join process. It is now no more necessary. */ 541 wfx_filter_beacon(wvif, true); 542 } 543 544 if (changed & BSS_CHANGED_ARP_FILTER) { 545 for (i = 0; i < HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES; i++) { 546 __be32 *arp_addr = &vif->cfg.arp_addr_list[i]; 547 548 if (vif->cfg.arp_addr_cnt > HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES) 549 arp_addr = NULL; 550 if (i >= vif->cfg.arp_addr_cnt) 551 arp_addr = NULL; 552 wfx_hif_set_arp_ipv4_filter(wvif, i, arp_addr); 553 } 554 } 555 556 if (changed & BSS_CHANGED_AP_PROBE_RESP || changed & BSS_CHANGED_BEACON) 557 wfx_upload_ap_templates(wvif); 558 559 if (changed & BSS_CHANGED_BEACON_ENABLED) 560 wfx_enable_beacon(wvif, info->enable_beacon); 561 562 if (changed & BSS_CHANGED_KEEP_ALIVE) 563 wfx_hif_keep_alive_period(wvif, 564 info->max_idle_period * USEC_PER_TU / USEC_PER_MSEC); 565 566 if (changed & BSS_CHANGED_ERP_CTS_PROT) 567 wfx_hif_erp_use_protection(wvif, info->use_cts_prot); 568 569 if (changed & BSS_CHANGED_ERP_SLOT) 570 wfx_hif_slot_time(wvif, info->use_short_slot ? 9 : 20); 571 572 if (changed & BSS_CHANGED_CQM) 573 wfx_hif_set_rcpi_rssi_threshold(wvif, info->cqm_rssi_thold, info->cqm_rssi_hyst); 574 575 if (changed & BSS_CHANGED_TXPOWER) 576 wfx_hif_set_output_power(wvif, info->txpower); 577 578 if (changed & BSS_CHANGED_PS) 579 wfx_update_pm(wvif); 580 581 mutex_unlock(&wdev->conf_mutex); 582 } 583 584 static int wfx_update_tim(struct wfx_vif *wvif) 585 { 586 struct ieee80211_vif *vif = wvif_to_vif(wvif); 587 struct sk_buff *skb; 588 u16 tim_offset, tim_length; 589 u8 *tim_ptr; 590 591 skb = ieee80211_beacon_get_tim(wvif->wdev->hw, vif, &tim_offset, 592 &tim_length, 0); 593 if (!skb) 594 return -ENOENT; 595 tim_ptr = skb->data + tim_offset; 596 597 if (tim_offset && tim_length >= 6) { 598 /* Firmware handles DTIM counter internally */ 599 tim_ptr[2] = 0; 600 601 /* Set/reset aid0 bit */ 602 if (wfx_tx_queues_has_cab(wvif)) 603 tim_ptr[4] |= 1; 604 else 605 tim_ptr[4] &= ~1; 606 } 607 608 wfx_hif_update_ie_beacon(wvif, tim_ptr, tim_length); 609 dev_kfree_skb(skb); 610 611 return 0; 612 } 613 614 static void wfx_update_tim_work(struct work_struct *work) 615 { 616 struct wfx_vif *wvif = container_of(work, struct wfx_vif, update_tim_work); 617 618 wfx_update_tim(wvif); 619 } 620 621 int wfx_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set) 622 { 623 struct wfx_dev *wdev = hw->priv; 624 struct wfx_sta_priv *sta_dev = (struct wfx_sta_priv *)&sta->drv_priv; 625 struct wfx_vif *wvif = wdev_to_wvif(wdev, sta_dev->vif_id); 626 627 if (!wvif) { 628 dev_warn(wdev->dev, "%s: received event for non-existent vif\n", __func__); 629 return -EIO; 630 } 631 schedule_work(&wvif->update_tim_work); 632 return 0; 633 } 634 635 void wfx_suspend_resume_mc(struct wfx_vif *wvif, enum sta_notify_cmd notify_cmd) 636 { 637 struct wfx_vif *wvif_it; 638 639 if (notify_cmd != STA_NOTIFY_AWAKE) 640 return; 641 642 /* Device won't be able to honor CAB if a scan is in progress on any interface. Prefer to 643 * skip this DTIM and wait for the next one. 644 */ 645 wvif_it = NULL; 646 while ((wvif_it = wvif_iterate(wvif->wdev, wvif_it)) != NULL) 647 if (mutex_is_locked(&wvif_it->scan_lock)) 648 return; 649 650 if (!wfx_tx_queues_has_cab(wvif) || wvif->after_dtim_tx_allowed) 651 dev_warn(wvif->wdev->dev, "incorrect sequence (%d CAB in queue)", 652 wfx_tx_queues_has_cab(wvif)); 653 wvif->after_dtim_tx_allowed = true; 654 wfx_bh_request_tx(wvif->wdev); 655 } 656 657 int wfx_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 658 struct ieee80211_ampdu_params *params) 659 { 660 /* Aggregation is implemented fully in firmware */ 661 switch (params->action) { 662 case IEEE80211_AMPDU_RX_START: 663 case IEEE80211_AMPDU_RX_STOP: 664 /* Just acknowledge it to enable frame re-ordering */ 665 return 0; 666 default: 667 /* Leave the firmware doing its business for tx aggregation */ 668 return -EOPNOTSUPP; 669 } 670 } 671 672 int wfx_add_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf) 673 { 674 return 0; 675 } 676 677 void wfx_remove_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf) 678 { 679 } 680 681 void wfx_change_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf, u32 changed) 682 { 683 } 684 685 int wfx_assign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 686 struct ieee80211_bss_conf *link_conf, 687 struct ieee80211_chanctx_conf *conf) 688 { 689 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 690 struct ieee80211_channel *ch = conf->def.chan; 691 692 WARN(wvif->channel, "channel overwrite"); 693 wvif->channel = ch; 694 695 return 0; 696 } 697 698 void wfx_unassign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 699 struct ieee80211_bss_conf *link_conf, 700 struct ieee80211_chanctx_conf *conf) 701 { 702 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 703 struct ieee80211_channel *ch = conf->def.chan; 704 705 WARN(wvif->channel != ch, "channel mismatch"); 706 wvif->channel = NULL; 707 } 708 709 int wfx_config(struct ieee80211_hw *hw, u32 changed) 710 { 711 return 0; 712 } 713 714 int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 715 { 716 int i; 717 struct wfx_dev *wdev = hw->priv; 718 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 719 720 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER | 721 IEEE80211_VIF_SUPPORTS_UAPSD | 722 IEEE80211_VIF_SUPPORTS_CQM_RSSI; 723 724 mutex_lock(&wdev->conf_mutex); 725 726 switch (vif->type) { 727 case NL80211_IFTYPE_STATION: 728 case NL80211_IFTYPE_ADHOC: 729 case NL80211_IFTYPE_AP: 730 break; 731 default: 732 mutex_unlock(&wdev->conf_mutex); 733 return -EOPNOTSUPP; 734 } 735 736 wvif->wdev = wdev; 737 738 wvif->link_id_map = 1; /* link-id 0 is reserved for multicast */ 739 INIT_WORK(&wvif->update_tim_work, wfx_update_tim_work); 740 INIT_DELAYED_WORK(&wvif->beacon_loss_work, wfx_beacon_loss_work); 741 742 init_completion(&wvif->set_pm_mode_complete); 743 complete(&wvif->set_pm_mode_complete); 744 INIT_WORK(&wvif->tx_policy_upload_work, wfx_tx_policy_upload_work); 745 746 mutex_init(&wvif->scan_lock); 747 init_completion(&wvif->scan_complete); 748 INIT_WORK(&wvif->scan_work, wfx_hw_scan_work); 749 750 wfx_tx_queues_init(wvif); 751 wfx_tx_policy_init(wvif); 752 753 for (i = 0; i < ARRAY_SIZE(wdev->vif); i++) { 754 if (!wdev->vif[i]) { 755 wdev->vif[i] = vif; 756 wvif->id = i; 757 break; 758 } 759 } 760 WARN(i == ARRAY_SIZE(wdev->vif), "try to instantiate more vif than supported"); 761 762 wfx_hif_set_macaddr(wvif, vif->addr); 763 764 mutex_unlock(&wdev->conf_mutex); 765 766 wvif = NULL; 767 while ((wvif = wvif_iterate(wdev, wvif)) != NULL) { 768 /* Combo mode does not support Block Acks. We can re-enable them */ 769 if (wvif_count(wdev) == 1) 770 wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF); 771 else 772 wfx_hif_set_block_ack_policy(wvif, 0x00, 0x00); 773 } 774 return 0; 775 } 776 777 void wfx_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 778 { 779 struct wfx_dev *wdev = hw->priv; 780 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; 781 782 wait_for_completion_timeout(&wvif->set_pm_mode_complete, msecs_to_jiffies(300)); 783 wfx_tx_queues_check_empty(wvif); 784 785 mutex_lock(&wdev->conf_mutex); 786 WARN(wvif->link_id_map != 1, "corrupted state"); 787 788 wfx_hif_reset(wvif, false); 789 wfx_hif_set_macaddr(wvif, NULL); 790 wfx_tx_policy_init(wvif); 791 792 cancel_delayed_work_sync(&wvif->beacon_loss_work); 793 wdev->vif[wvif->id] = NULL; 794 795 mutex_unlock(&wdev->conf_mutex); 796 797 wvif = NULL; 798 while ((wvif = wvif_iterate(wdev, wvif)) != NULL) { 799 /* Combo mode does not support Block Acks. We can re-enable them */ 800 if (wvif_count(wdev) == 1) 801 wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF); 802 else 803 wfx_hif_set_block_ack_policy(wvif, 0x00, 0x00); 804 } 805 } 806 807 int wfx_start(struct ieee80211_hw *hw) 808 { 809 return 0; 810 } 811 812 void wfx_stop(struct ieee80211_hw *hw) 813 { 814 struct wfx_dev *wdev = hw->priv; 815 816 WARN_ON(!skb_queue_empty_lockless(&wdev->tx_pending)); 817 } 818