LXR linux/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
  32void 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}
  54EXPORT_SYMBOL_GPL(wlcore_event_rssi_trigger);
  55
  56static 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                                 WL12XX_MAX_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
  82void 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}
  95EXPORT_SYMBOL_GPL(wlcore_event_soft_gemini_sense);
  96
  97void 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}
 108EXPORT_SYMBOL_GPL(wlcore_event_sched_scan_completed);
 109
 110void 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}
 130EXPORT_SYMBOL_GPL(wlcore_event_ba_rx_constraint);
 131
 132void 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}
 157EXPORT_SYMBOL_GPL(wlcore_event_channel_switch);
 158
 159void 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}
 164EXPORT_SYMBOL_GPL(wlcore_event_dummy_packet);
 165
 166static 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, WL12XX_MAX_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
 200void 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}
 205EXPORT_SYMBOL_GPL(wlcore_event_max_tx_failure);
 206
 207void 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}
 212EXPORT_SYMBOL_GPL(wlcore_event_inactive_sta);
 213
 214void 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}
 220EXPORT_SYMBOL_GPL(wlcore_event_roc_complete);
 221
 222void 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}
 263EXPORT_SYMBOL_GPL(wlcore_event_beacon_loss);
 264
 265int wl1271_event_unmask(struct wl1271 *wl)
 266{
 267        int ret;
 268
 269        ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
 270        if (ret < 0)
 271                return ret;
 272
 273        return 0;
 274}
 275
 276int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
 277{
 278        int ret;
 279
 280        wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
 281
 282        if (mbox_num > 1)
 283                return -EINVAL;
 284
 285        /* first we read the mbox descriptor */
 286        ret = wlcore_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
 287                          wl->mbox_size, false);
 288        if (ret < 0)
 289                return ret;
 290
 291        /* process the descriptor */
 292        ret = wl->ops->process_mailbox_events(wl);
 293        if (ret < 0)
 294                return ret;
 295
 296        /*
 297         * TODO: we just need this because one bit is in a different
 298         * place.  Is there any better way?
 299         */
 300        ret = wl->ops->ack_event(wl);
 301
 302        return ret;
 303}
 304