drivers/net/wireless/ti/wl18xx/event.c

   1 /*
   2  * This file is part of wl12xx
   3  *
   4  * Copyright (C) 2012 Texas Instruments. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <net/genetlink.h>
  23 #include "event.h"
  24 #include "scan.h"
  25 #include "conf.h"
  26 #include "../wlcore/cmd.h"
  27 #include "../wlcore/debug.h"
  28 #include "../wlcore/vendor_cmd.h"
  29
  30 int wl18xx_wait_for_event(struct wl1271 *wl, enum wlcore_wait_event event,
  31                           bool *timeout)
  32 {
  33         u32 local_event;
  34
  35         switch (event) {
  36         case WLCORE_EVENT_PEER_REMOVE_COMPLETE:
  37                 local_event = PEER_REMOVE_COMPLETE_EVENT_ID;
  38                 break;
  39
  40         case WLCORE_EVENT_DFS_CONFIG_COMPLETE:
  41                 local_event = DFS_CHANNELS_CONFIG_COMPLETE_EVENT;
  42                 break;
  43
  44         default:
  45                 /* event not implemented */
  46                 return 0;
  47         }
  48         return wlcore_cmd_wait_for_event_or_timeout(wl, local_event, timeout);
  49 }
  50
  51 static const char *wl18xx_radar_type_decode(u8 radar_type)
  52 {
  53         switch (radar_type) {
  54         case RADAR_TYPE_REGULAR:
  55                 return "REGULAR";
  56         case RADAR_TYPE_CHIRP:
  57                 return "CHIRP";
  58         case RADAR_TYPE_NONE:
  59         default:
  60                 return "N/A";
  61         }
  62 }
  63
  64 static int wlcore_smart_config_sync_event(struct wl1271 *wl, u8 sync_channel,
  65                                           u8 sync_band)
  66 {
  67         struct sk_buff *skb;
  68         enum nl80211_band band;
  69         int freq;
  70
  71         if (sync_band == WLCORE_BAND_5GHZ)
  72                 band = NL80211_BAND_5GHZ;
  73         else
  74                 band = NL80211_BAND_2GHZ;
  75
  76         freq = ieee80211_channel_to_frequency(sync_channel, band);
  77
  78         wl1271_debug(DEBUG_EVENT,
  79                      "SMART_CONFIG_SYNC_EVENT_ID, freq: %d (chan: %d band %d)",
  80                      freq, sync_channel, sync_band);
  81         skb = cfg80211_vendor_event_alloc(wl->hw->wiphy, NULL, 20,
  82                                           WLCORE_VENDOR_EVENT_SC_SYNC,
  83                                           GFP_KERNEL);
  84
  85         if (nla_put_u32(skb, WLCORE_VENDOR_ATTR_FREQ, freq)) {
  86                 kfree_skb(skb);
  87                 return -EMSGSIZE;
  88         }
  89         cfg80211_vendor_event(skb, GFP_KERNEL);
  90         return 0;
  91 }
  92
  93 static int wlcore_smart_config_decode_event(struct wl1271 *wl,
  94                                             u8 ssid_len, u8 *ssid,
  95                                             u8 pwd_len, u8 *pwd)
  96 {
  97         struct sk_buff *skb;
  98
  99         wl1271_debug(DEBUG_EVENT, "SMART_CONFIG_DECODE_EVENT_ID");
 100         wl1271_dump_ascii(DEBUG_EVENT, "SSID:", ssid, ssid_len);
 101
 102         skb = cfg80211_vendor_event_alloc(wl->hw->wiphy, NULL,
 103                                           ssid_len + pwd_len + 20,
 104                                           WLCORE_VENDOR_EVENT_SC_DECODE,
 105                                           GFP_KERNEL);
 106
 107         if (nla_put(skb, WLCORE_VENDOR_ATTR_SSID, ssid_len, ssid) ||
 108             nla_put(skb, WLCORE_VENDOR_ATTR_PSK, pwd_len, pwd)) {
 109                 kfree_skb(skb);
 110                 return -EMSGSIZE;
 111         }
 112         cfg80211_vendor_event(skb, GFP_KERNEL);
 113         return 0;
 114 }
 115
 116 static void wlcore_event_time_sync(struct wl1271 *wl,
 117                                    u16 tsf_high_msb, u16 tsf_high_lsb,
 118                                    u16 tsf_low_msb, u16 tsf_low_lsb)
 119 {
 120         u32 clock_low;
 121         u32 clock_high;
 122
 123         clock_high = (tsf_high_msb << 16) | tsf_high_lsb;
 124         clock_low = (tsf_low_msb << 16) | tsf_low_lsb;
 125
 126         wl1271_info("TIME_SYNC_EVENT_ID: clock_high %u, clock low %u",
 127                     clock_high, clock_low);
 128 }
 129
 130 int wl18xx_process_mailbox_events(struct wl1271 *wl)
 131 {
 132         struct wl18xx_event_mailbox *mbox = wl->mbox;
 133         u32 vector;
 134
 135         vector = le32_to_cpu(mbox->events_vector);
 136         wl1271_debug(DEBUG_EVENT, "MBOX vector: 0x%x", vector);
 137
 138         if (vector & SCAN_COMPLETE_EVENT_ID) {
 139                 wl1271_debug(DEBUG_EVENT, "scan results: %d",
 140                              mbox->number_of_scan_results);
 141
 142                 if (wl->scan_wlvif)
 143                         wl18xx_scan_completed(wl, wl->scan_wlvif);
 144         }
 145
 146         if (vector & TIME_SYNC_EVENT_ID)
 147                 wlcore_event_time_sync(wl,
 148                         mbox->time_sync_tsf_high_msb,
 149                         mbox->time_sync_tsf_high_lsb,
 150                         mbox->time_sync_tsf_low_msb,
 151                         mbox->time_sync_tsf_low_lsb);
 152
 153         if (vector & RADAR_DETECTED_EVENT_ID) {
 154                 wl1271_info("radar event: channel %d type %s",
 155                             mbox->radar_channel,
 156                             wl18xx_radar_type_decode(mbox->radar_type));
 157
 158                 if (!wl->radar_debug_mode)
 159                         ieee80211_radar_detected(wl->hw);
 160         }
 161
 162         if (vector & PERIODIC_SCAN_REPORT_EVENT_ID) {
 163                 wl1271_debug(DEBUG_EVENT,
 164                              "PERIODIC_SCAN_REPORT_EVENT (results %d)",
 165                              mbox->number_of_sched_scan_results);
 166
 167                 wlcore_scan_sched_scan_results(wl);
 168         }
 169
 170         if (vector & PERIODIC_SCAN_COMPLETE_EVENT_ID)
 171                 wlcore_event_sched_scan_completed(wl, 1);
 172
 173         if (vector & RSSI_SNR_TRIGGER_0_EVENT_ID)
 174                 wlcore_event_rssi_trigger(wl, mbox->rssi_snr_trigger_metric);
 175
 176         if (vector & BA_SESSION_RX_CONSTRAINT_EVENT_ID)
 177                 wlcore_event_ba_rx_constraint(wl,
 178                                 le16_to_cpu(mbox->rx_ba_role_id_bitmap),
 179                                 le16_to_cpu(mbox->rx_ba_allowed_bitmap));
 180
 181         if (vector & BSS_LOSS_EVENT_ID)
 182                 wlcore_event_beacon_loss(wl,
 183                                          le16_to_cpu(mbox->bss_loss_bitmap));
 184
 185         if (vector & CHANNEL_SWITCH_COMPLETE_EVENT_ID)
 186                 wlcore_event_channel_switch(wl,
 187                         le16_to_cpu(mbox->channel_switch_role_id_bitmap),
 188                         true);
 189
 190         if (vector & DUMMY_PACKET_EVENT_ID)
 191                 wlcore_event_dummy_packet(wl);
 192
 193         /*
 194          * "TX retries exceeded" has a different meaning according to mode.
 195          * In AP mode the offending station is disconnected.
 196          */
 197         if (vector & MAX_TX_FAILURE_EVENT_ID)
 198                 wlcore_event_max_tx_failure(wl,
 199                                 le16_to_cpu(mbox->tx_retry_exceeded_bitmap));
 200
 201         if (vector & INACTIVE_STA_EVENT_ID)
 202                 wlcore_event_inactive_sta(wl,
 203                                 le16_to_cpu(mbox->inactive_sta_bitmap));
 204
 205         if (vector & REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID)
 206                 wlcore_event_roc_complete(wl);
 207
 208         if (vector & SMART_CONFIG_SYNC_EVENT_ID)
 209                 wlcore_smart_config_sync_event(wl, mbox->sc_sync_channel,
 210                                                mbox->sc_sync_band);
 211
 212         if (vector & SMART_CONFIG_DECODE_EVENT_ID)
 213                 wlcore_smart_config_decode_event(wl,
 214                                                  mbox->sc_ssid_len,
 215                                                  mbox->sc_ssid,
 216                                                  mbox->sc_pwd_len,
 217                                                  mbox->sc_pwd);
 218         if (vector & FW_LOGGER_INDICATION)
 219                 wlcore_event_fw_logger(wl);
 220
 221         if (vector & RX_BA_WIN_SIZE_CHANGE_EVENT_ID) {
 222                 struct wl12xx_vif *wlvif;
 223                 struct ieee80211_vif *vif;
 224                 struct ieee80211_sta *sta;
 225                 u8 link_id = mbox->rx_ba_link_id;
 226                 u8 win_size = mbox->rx_ba_win_size;
 227                 const u8 *addr;
 228
 229                 wlvif = wl->links[link_id].wlvif;
 230                 vif = wl12xx_wlvif_to_vif(wlvif);
 231
 232                 /* Update RX aggregation window size and call
 233                  * MAC routine to stop active RX aggregations for this link
 234                  */
 235                 if (wlvif->bss_type != BSS_TYPE_AP_BSS)
 236                         addr = vif->bss_conf.bssid;
 237                 else
 238                         addr = wl->links[link_id].addr;
 239
 240                 sta = ieee80211_find_sta(vif, addr);
 241                 if (sta) {
 242                         sta->max_rx_aggregation_subframes = win_size;
 243                         ieee80211_stop_rx_ba_session(vif,
 244                                                 wl->links[link_id].ba_bitmap,
 245                                                 addr);
 246                 }
 247         }
 248
 249         return 0;
 250 }