drivers/net/wireless/ti/wlcore/event.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include "wlcore.h"
  25 #include "debug.h"
  26 #include "io.h"
  27 #include "event.h"
  28 #include "ps.h"
  29 #include "scan.h"
  30 #include "wl12xx_80211.h"
  31
  32 void wlcore_event_rssi_trigger(struct wl1271 *wl, s8 *metric_arr)
  33 {
  34         struct wl12xx_vif *wlvif;
  35         struct ieee80211_vif *vif;
  36         enum nl80211_cqm_rssi_threshold_event event;
  37         s8 metric = metric_arr[0];
  38
  39         wl1271_debug(DEBUG_EVENT, "RSSI trigger metric: %d", metric);
  40
  41         /* TODO: check actual multi-role support */
  42         wl12xx_for_each_wlvif_sta(wl, wlvif) {
  43                 if (metric <= wlvif->rssi_thold)
  44                         event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
  45                 else
  46                         event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
  47
  48                 vif = wl12xx_wlvif_to_vif(wlvif);
  49                 if (event != wlvif->last_rssi_event)
  50                         ieee80211_cqm_rssi_notify(vif, event, GFP_KERNEL);
  51                 wlvif->last_rssi_event = event;
  52         }
  53 }
  54 EXPORT_SYMBOL_GPL(wlcore_event_rssi_trigger);
  55
  56 static void wl1271_stop_ba_event(struct wl1271 *wl, struct wl12xx_vif *wlvif)
  57 {
  58         struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
  59
  60         if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
  61                 u8 hlid = wlvif->sta.hlid;
  62                 if (!wl->links[hlid].ba_bitmap)
  63                         return;
  64                 ieee80211_stop_rx_ba_session(vif, wl->links[hlid].ba_bitmap,
  65                                              vif->bss_conf.bssid);
  66         } else {
  67                 u8 hlid;
  68                 struct wl1271_link *lnk;
  69                 for_each_set_bit(hlid, wlvif->ap.sta_hlid_map,
  70                                  wl->num_links) {
  71                         lnk = &wl->links[hlid];
  72                         if (!lnk->ba_bitmap)
  73                                 continue;
  74
  75                         ieee80211_stop_rx_ba_session(vif,
  76                                                      lnk->ba_bitmap,
  77                                                      lnk->addr);
  78                 }
  79         }
  80 }
  81
  82 void wlcore_event_soft_gemini_sense(struct wl1271 *wl, u8 enable)
  83 {
  84         struct wl12xx_vif *wlvif;
  85
  86         if (enable) {
  87                 set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
  88         } else {
  89                 clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
  90                 wl12xx_for_each_wlvif_sta(wl, wlvif) {
  91                         wl1271_recalc_rx_streaming(wl, wlvif);
  92                 }
  93         }
  94 }
  95 EXPORT_SYMBOL_GPL(wlcore_event_soft_gemini_sense);
  96
  97 void wlcore_event_sched_scan_completed(struct wl1271 *wl,
  98                                        u8 status)
  99 {
 100         wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT (status 0x%0x)",
 101                      status);
 102
 103         if (wl->sched_vif) {
 104                 ieee80211_sched_scan_stopped(wl->hw);
 105                 wl->sched_vif = NULL;
 106         }
 107 }
 108 EXPORT_SYMBOL_GPL(wlcore_event_sched_scan_completed);
 109
 110 void wlcore_event_ba_rx_constraint(struct wl1271 *wl,
 111                                    unsigned long roles_bitmap,
 112                                    unsigned long allowed_bitmap)
 113 {
 114         struct wl12xx_vif *wlvif;
 115
 116         wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx allowed=0x%lx",
 117                      __func__, roles_bitmap, allowed_bitmap);
 118
 119         wl12xx_for_each_wlvif(wl, wlvif) {
 120                 if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 121                     !test_bit(wlvif->role_id , &roles_bitmap))
 122                         continue;
 123
 124                 wlvif->ba_allowed = !!test_bit(wlvif->role_id,
 125                                                &allowed_bitmap);
 126                 if (!wlvif->ba_allowed)
 127                         wl1271_stop_ba_event(wl, wlvif);
 128         }
 129 }
 130 EXPORT_SYMBOL_GPL(wlcore_event_ba_rx_constraint);
 131
 132 void wlcore_event_channel_switch(struct wl1271 *wl,
 133                                  unsigned long roles_bitmap,
 134                                  bool success)
 135 {
 136         struct wl12xx_vif *wlvif;
 137         struct ieee80211_vif *vif;
 138
 139         wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx success=%d",
 140                      __func__, roles_bitmap, success);
 141
 142         wl12xx_for_each_wlvif_sta(wl, wlvif) {
 143                 if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 144                     !test_bit(wlvif->role_id , &roles_bitmap))
 145                         continue;
 146
 147                 if (!test_and_clear_bit(WLVIF_FLAG_CS_PROGRESS,
 148                                         &wlvif->flags))
 149                         continue;
 150
 151                 vif = wl12xx_wlvif_to_vif(wlvif);
 152
 153                 ieee80211_chswitch_done(vif, success);
 154                 cancel_delayed_work(&wlvif->channel_switch_work);
 155         }
 156 }
 157 EXPORT_SYMBOL_GPL(wlcore_event_channel_switch);
 158
 159 void wlcore_event_dummy_packet(struct wl1271 *wl)
 160 {
 161         wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
 162         wl1271_tx_dummy_packet(wl);
 163 }
 164 EXPORT_SYMBOL_GPL(wlcore_event_dummy_packet);
 165
 166 static void wlcore_disconnect_sta(struct wl1271 *wl, unsigned long sta_bitmap)
 167 {
 168         u32 num_packets = wl->conf.tx.max_tx_retries;
 169         struct wl12xx_vif *wlvif;
 170         struct ieee80211_vif *vif;
 171         struct ieee80211_sta *sta;
 172         const u8 *addr;
 173         int h;
 174
 175         for_each_set_bit(h, &sta_bitmap, wl->num_links) {
 176                 bool found = false;
 177                 /* find the ap vif connected to this sta */
 178                 wl12xx_for_each_wlvif_ap(wl, wlvif) {
 179                         if (!test_bit(h, wlvif->ap.sta_hlid_map))
 180                                 continue;
 181                         found = true;
 182                         break;
 183                 }
 184                 if (!found)
 185                         continue;
 186
 187                 vif = wl12xx_wlvif_to_vif(wlvif);
 188                 addr = wl->links[h].addr;
 189
 190                 rcu_read_lock();
 191                 sta = ieee80211_find_sta(vif, addr);
 192                 if (sta) {
 193                         wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
 194                         ieee80211_report_low_ack(sta, num_packets);
 195                 }
 196                 rcu_read_unlock();
 197         }
 198 }
 199
 200 void wlcore_event_max_tx_failure(struct wl1271 *wl, unsigned long sta_bitmap)
 201 {
 202         wl1271_debug(DEBUG_EVENT, "MAX_TX_FAILURE_EVENT_ID");
 203         wlcore_disconnect_sta(wl, sta_bitmap);
 204 }
 205 EXPORT_SYMBOL_GPL(wlcore_event_max_tx_failure);
 206
 207 void wlcore_event_inactive_sta(struct wl1271 *wl, unsigned long sta_bitmap)
 208 {
 209         wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
 210         wlcore_disconnect_sta(wl, sta_bitmap);
 211 }
 212 EXPORT_SYMBOL_GPL(wlcore_event_inactive_sta);
 213
 214 void wlcore_event_roc_complete(struct wl1271 *wl)
 215 {
 216         wl1271_debug(DEBUG_EVENT, "REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID");
 217         if (wl->roc_vif)
 218                 ieee80211_ready_on_channel(wl->hw);
 219 }
 220 EXPORT_SYMBOL_GPL(wlcore_event_roc_complete);
 221
 222 void wlcore_event_beacon_loss(struct wl1271 *wl, unsigned long roles_bitmap)
 223 {
 224         /*
 225          * We are HW_MONITOR device. On beacon loss - queue
 226          * connection loss work. Cancel it on REGAINED event.
 227          */
 228         struct wl12xx_vif *wlvif;
 229         struct ieee80211_vif *vif;
 230         int delay = wl->conf.conn.synch_fail_thold *
 231                                 wl->conf.conn.bss_lose_timeout;
 232
 233         wl1271_info("Beacon loss detected. roles:0x%lx", roles_bitmap);
 234
 235         wl12xx_for_each_wlvif_sta(wl, wlvif) {
 236                 if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 237                     !test_bit(wlvif->role_id , &roles_bitmap))
 238                         continue;
 239
 240                 vif = wl12xx_wlvif_to_vif(wlvif);
 241
 242                 /* don't attempt roaming in case of p2p */
 243                 if (wlvif->p2p) {
 244                         ieee80211_connection_loss(vif);
 245                         continue;
 246                 }
 247
 248                 /*
 249                  * if the work is already queued, it should take place.
 250                  * We don't want to delay the connection loss
 251                  * indication any more.
 252                  */
 253                 ieee80211_queue_delayed_work(wl->hw,
 254                                              &wlvif->connection_loss_work,
 255                                              msecs_to_jiffies(delay));
 256
 257                 ieee80211_cqm_rssi_notify(
 258                                 vif,
 259                                 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
 260                                 GFP_KERNEL);
 261         }
 262 }
 263 EXPORT_SYMBOL_GPL(wlcore_event_beacon_loss);
 264
 265 int wl1271_event_unmask(struct wl1271 *wl)
 266 {
 267         int ret;
 268
 269         wl1271_debug(DEBUG_EVENT, "unmasking event_mask 0x%x", wl->event_mask);
 270         ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
 271         if (ret < 0)
 272                 return ret;
 273
 274         return 0;
 275 }
 276
 277 int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
 278 {
 279         int ret;
 280
 281         wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
 282
 283         if (mbox_num > 1)
 284                 return -EINVAL;
 285
 286         /* first we read the mbox descriptor */
 287         ret = wlcore_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
 288                           wl->mbox_size, false);
 289         if (ret < 0)
 290                 return ret;
 291
 292         /* process the descriptor */
 293         ret = wl->ops->process_mailbox_events(wl);
 294         if (ret < 0)
 295                 return ret;
 296
 297         /*
 298          * TODO: we just need this because one bit is in a different
 299          * place.  Is there any better way?
 300          */
 301         ret = wl->ops->ack_event(wl);
 302
 303         return ret;
 304 }