drivers/net/wireless/mwifiex/uap_event.c

   1 /*
   2  * Marvell Wireless LAN device driver: AP event handling
   3  *
   4  * Copyright (C) 2012-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "main.h"
  22 #include "11n.h"
  23
  24 #define MWIFIEX_BSS_START_EVT_FIX_SIZE    12
  25
  26 static int mwifiex_check_uap_capabilties(struct mwifiex_private *priv,
  27                                          struct sk_buff *event)
  28 {
  29         int evt_len;
  30         u8 *curr;
  31         u16 tlv_len;
  32         struct mwifiex_ie_types_data *tlv_hdr;
  33         struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
  34         int mask = IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK;
  35
  36         priv->wmm_enabled = false;
  37         skb_pull(event, MWIFIEX_BSS_START_EVT_FIX_SIZE);
  38         evt_len = event->len;
  39         curr = event->data;
  40
  41         mwifiex_dbg_dump(priv->adapter, EVT_D, "uap capabilties:",
  42                          event->data, event->len);
  43
  44         while ((evt_len >= sizeof(tlv_hdr->header))) {
  45                 tlv_hdr = (struct mwifiex_ie_types_data *)curr;
  46                 tlv_len = le16_to_cpu(tlv_hdr->header.len);
  47
  48                 if (evt_len < tlv_len + sizeof(tlv_hdr->header))
  49                         break;
  50
  51                 switch (le16_to_cpu(tlv_hdr->header.type)) {
  52                 case WLAN_EID_HT_CAPABILITY:
  53                         priv->ap_11n_enabled = true;
  54                         break;
  55
  56                 case WLAN_EID_VHT_CAPABILITY:
  57                         priv->ap_11ac_enabled = true;
  58                         break;
  59
  60                 case WLAN_EID_VENDOR_SPECIFIC:
  61                         /* Point the regular IEEE IE 2 bytes into the Marvell IE
  62                          * and setup the IEEE IE type and length byte fields
  63                          */
  64                         wmm_param_ie = (void *)(curr + 2);
  65                         wmm_param_ie->vend_hdr.len = (u8)tlv_len;
  66                         wmm_param_ie->vend_hdr.element_id =
  67                                                 WLAN_EID_VENDOR_SPECIFIC;
  68                         mwifiex_dbg(priv->adapter, EVENT,
  69                                     "info: check uap capabilities:\t"
  70                                     "wmm parameter set count: %d\n",
  71                                     wmm_param_ie->qos_info_bitmap & mask);
  72
  73                         mwifiex_wmm_setup_ac_downgrade(priv);
  74                         priv->wmm_enabled = true;
  75                         mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
  76                         break;
  77
  78                 default:
  79                         break;
  80                 }
  81
  82                 curr += (tlv_len + sizeof(tlv_hdr->header));
  83                 evt_len -= (tlv_len + sizeof(tlv_hdr->header));
  84         }
  85
  86         return 0;
  87 }
  88
  89 /*
  90  * This function handles AP interface specific events generated by firmware.
  91  *
  92  * Event specific routines are called by this function based
  93  * upon the generated event cause.
  94  *
  95  *
  96  * Events supported for AP -
  97  *      - EVENT_UAP_STA_ASSOC
  98  *      - EVENT_UAP_STA_DEAUTH
  99  *      - EVENT_UAP_BSS_ACTIVE
 100  *      - EVENT_UAP_BSS_START
 101  *      - EVENT_UAP_BSS_IDLE
 102  *      - EVENT_UAP_MIC_COUNTERMEASURES:
 103  */
 104 int mwifiex_process_uap_event(struct mwifiex_private *priv)
 105 {
 106         struct mwifiex_adapter *adapter = priv->adapter;
 107         int len, i;
 108         u32 eventcause = adapter->event_cause;
 109         struct station_info sinfo;
 110         struct mwifiex_assoc_event *event;
 111         struct mwifiex_sta_node *node;
 112         u8 *deauth_mac;
 113         struct host_cmd_ds_11n_batimeout *ba_timeout;
 114         u16 ctrl;
 115
 116         switch (eventcause) {
 117         case EVENT_UAP_STA_ASSOC:
 118                 memset(&sinfo, 0, sizeof(sinfo));
 119                 event = (struct mwifiex_assoc_event *)
 120                         (adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
 121                 if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
 122                         len = -1;
 123
 124                         if (ieee80211_is_assoc_req(event->frame_control))
 125                                 len = 0;
 126                         else if (ieee80211_is_reassoc_req(event->frame_control))
 127                                 /* There will be ETH_ALEN bytes of
 128                                  * current_ap_addr before the re-assoc ies.
 129                                  */
 130                                 len = ETH_ALEN;
 131
 132                         if (len != -1) {
 133                                 sinfo.assoc_req_ies = &event->data[len];
 134                                 len = (u8 *)sinfo.assoc_req_ies -
 135                                       (u8 *)&event->frame_control;
 136                                 sinfo.assoc_req_ies_len =
 137                                         le16_to_cpu(event->len) - (u16)len;
 138                         }
 139                 }
 140                 cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
 141                                  GFP_KERNEL);
 142
 143                 node = mwifiex_add_sta_entry(priv, event->sta_addr);
 144                 if (!node) {
 145                         mwifiex_dbg(adapter, ERROR,
 146                                     "could not create station entry!\n");
 147                         return -1;
 148                 }
 149
 150                 if (!priv->ap_11n_enabled)
 151                         break;
 152
 153                 mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
 154                                        sinfo.assoc_req_ies_len, node);
 155
 156                 for (i = 0; i < MAX_NUM_TID; i++) {
 157                         if (node->is_11n_enabled)
 158                                 node->ampdu_sta[i] =
 159                                               priv->aggr_prio_tbl[i].ampdu_user;
 160                         else
 161                                 node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
 162                 }
 163                 memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
 164                 break;
 165         case EVENT_UAP_STA_DEAUTH:
 166                 deauth_mac = adapter->event_body +
 167                              MWIFIEX_UAP_EVENT_EXTRA_HEADER;
 168                 cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);
 169
 170                 if (priv->ap_11n_enabled) {
 171                         mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
 172                         mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
 173                 }
 174                 mwifiex_wmm_del_peer_ra_list(priv, deauth_mac);
 175                 mwifiex_del_sta_entry(priv, deauth_mac);
 176                 break;
 177         case EVENT_UAP_BSS_IDLE:
 178                 priv->media_connected = false;
 179                 if (netif_carrier_ok(priv->netdev))
 180                         netif_carrier_off(priv->netdev);
 181                 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 182
 183                 mwifiex_clean_txrx(priv);
 184                 mwifiex_del_all_sta_list(priv);
 185                 break;
 186         case EVENT_UAP_BSS_ACTIVE:
 187                 priv->media_connected = true;
 188                 if (!netif_carrier_ok(priv->netdev))
 189                         netif_carrier_on(priv->netdev);
 190                 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 191                 break;
 192         case EVENT_UAP_BSS_START:
 193                 mwifiex_dbg(adapter, EVENT,
 194                             "AP EVENT: event id: %#x\n", eventcause);
 195                 memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
 196                        ETH_ALEN);
 197                 if (priv->hist_data)
 198                         mwifiex_hist_data_reset(priv);
 199                 mwifiex_check_uap_capabilties(priv, adapter->event_skb);
 200                 break;
 201         case EVENT_UAP_MIC_COUNTERMEASURES:
 202                 /* For future development */
 203                 mwifiex_dbg(adapter, EVENT,
 204                             "AP EVENT: event id: %#x\n", eventcause);
 205                 break;
 206         case EVENT_AMSDU_AGGR_CTRL:
 207                 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 208                 mwifiex_dbg(adapter, EVENT,
 209                             "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 210
 211                 if (priv->media_connected) {
 212                         adapter->tx_buf_size =
 213                                 min_t(u16, adapter->curr_tx_buf_size, ctrl);
 214                         mwifiex_dbg(adapter, EVENT,
 215                                     "event: tx_buf_size %d\n",
 216                                     adapter->tx_buf_size);
 217                 }
 218                 break;
 219         case EVENT_ADDBA:
 220                 mwifiex_dbg(adapter, EVENT, "event: ADDBA Request\n");
 221                 if (priv->media_connected)
 222                         mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
 223                                          HostCmd_ACT_GEN_SET, 0,
 224                                          adapter->event_body, false);
 225                 break;
 226         case EVENT_DELBA:
 227                 mwifiex_dbg(adapter, EVENT, "event: DELBA Request\n");
 228                 if (priv->media_connected)
 229                         mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 230                 break;
 231         case EVENT_BA_STREAM_TIEMOUT:
 232                 mwifiex_dbg(adapter, EVENT, "event:  BA Stream timeout\n");
 233                 if (priv->media_connected) {
 234                         ba_timeout = (void *)adapter->event_body;
 235                         mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
 236                 }
 237                 break;
 238         case EVENT_EXT_SCAN_REPORT:
 239                 mwifiex_dbg(adapter, EVENT, "event: EXT_SCAN Report\n");
 240                 if (adapter->ext_scan)
 241                         return mwifiex_handle_event_ext_scan_report(priv,
 242                                                 adapter->event_skb->data);
 243                 break;
 244         case EVENT_TX_STATUS_REPORT:
 245                 mwifiex_dbg(adapter, EVENT, "event: TX_STATUS Report\n");
 246                 mwifiex_parse_tx_status_event(priv, adapter->event_body);
 247                 break;
 248         case EVENT_PS_SLEEP:
 249                 mwifiex_dbg(adapter, EVENT, "info: EVENT: SLEEP\n");
 250
 251                 adapter->ps_state = PS_STATE_PRE_SLEEP;
 252
 253                 mwifiex_check_ps_cond(adapter);
 254                 break;
 255
 256         case EVENT_PS_AWAKE:
 257                 mwifiex_dbg(adapter, EVENT, "info: EVENT: AWAKE\n");
 258                 if (!adapter->pps_uapsd_mode &&
 259                     priv->media_connected && adapter->sleep_period.period) {
 260                                 adapter->pps_uapsd_mode = true;
 261                                 mwifiex_dbg(adapter, EVENT,
 262                                             "event: PPS/UAPSD mode activated\n");
 263                 }
 264                 adapter->tx_lock_flag = false;
 265                 if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 266                         if (mwifiex_check_last_packet_indication(priv)) {
 267                                 if (adapter->data_sent) {
 268                                         adapter->ps_state = PS_STATE_AWAKE;
 269                                         adapter->pm_wakeup_card_req = false;
 270                                         adapter->pm_wakeup_fw_try = false;
 271                                         break;
 272                                 }
 273                                 if (!mwifiex_send_null_packet
 274                                         (priv,
 275                                          MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 276                                          MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 277                                                 adapter->ps_state =
 278                                                         PS_STATE_SLEEP;
 279                                         return 0;
 280                         }
 281                 }
 282                 adapter->ps_state = PS_STATE_AWAKE;
 283                 adapter->pm_wakeup_card_req = false;
 284                 adapter->pm_wakeup_fw_try = false;
 285                 break;
 286
 287         case EVENT_CHANNEL_REPORT_RDY:
 288                 mwifiex_dbg(adapter, EVENT, "event: Channel Report\n");
 289                 mwifiex_11h_handle_chanrpt_ready(priv, adapter->event_skb);
 290                 break;
 291         case EVENT_RADAR_DETECTED:
 292                 mwifiex_dbg(adapter, EVENT, "event: Radar detected\n");
 293                 mwifiex_11h_handle_radar_detected(priv, adapter->event_skb);
 294                 break;
 295         default:
 296                 mwifiex_dbg(adapter, EVENT,
 297                             "event: unknown event id: %#x\n", eventcause);
 298                 break;
 299         }
 300
 301         return 0;
 302 }
 303
 304 /* This function deletes station entry from associated station list.
 305  * Also if both AP and STA are 11n enabled, RxReorder tables and TxBA stream
 306  * tables created for this station are deleted.
 307  */
 308 void mwifiex_uap_del_sta_data(struct mwifiex_private *priv,
 309                               struct mwifiex_sta_node *node)
 310 {
 311         if (priv->ap_11n_enabled && node->is_11n_enabled) {
 312                 mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, node->mac_addr);
 313                 mwifiex_del_tx_ba_stream_tbl_by_ra(priv, node->mac_addr);
 314         }
 315         mwifiex_del_sta_entry(priv, node->mac_addr);
 316
 317         return;
 318 }