LXR linux/drivers/net/wireless/marvell/mwifiex/uap

   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
  26static int mwifiex_check_uap_capabilities(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 capabilities:",
  42                         event->data, event->len);
  43
  44        skb_push(event, MWIFIEX_BSS_START_EVT_FIX_SIZE);
  45
  46        while ((evt_len >= sizeof(tlv_hdr->header))) {
  47                tlv_hdr = (struct mwifiex_ie_types_data *)curr;
  48                tlv_len = le16_to_cpu(tlv_hdr->header.len);
  49
  50                if (evt_len < tlv_len + sizeof(tlv_hdr->header))
  51                        break;
  52
  53                switch (le16_to_cpu(tlv_hdr->header.type)) {
  54                case WLAN_EID_HT_CAPABILITY:
  55                        priv->ap_11n_enabled = true;
  56                        break;
  57
  58                case WLAN_EID_VHT_CAPABILITY:
  59                        priv->ap_11ac_enabled = true;
  60                        break;
  61
  62                case WLAN_EID_VENDOR_SPECIFIC:
  63                        /* Point the regular IEEE IE 2 bytes into the Marvell IE
  64                         * and setup the IEEE IE type and length byte fields
  65                         */
  66                        wmm_param_ie = (void *)(curr + 2);
  67                        wmm_param_ie->vend_hdr.len = (u8)tlv_len;
  68                        wmm_param_ie->vend_hdr.element_id =
  69                                                WLAN_EID_VENDOR_SPECIFIC;
  70                        mwifiex_dbg(priv->adapter, EVENT,
  71                                    "info: check uap capabilities:\t"
  72                                    "wmm parameter set count: %d\n",
  73                                    wmm_param_ie->qos_info_bitmap & mask);
  74
  75                        mwifiex_wmm_setup_ac_downgrade(priv);
  76                        priv->wmm_enabled = true;
  77                        mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
  78                        break;
  79
  80                default:
  81                        break;
  82                }
  83
  84                curr += (tlv_len + sizeof(tlv_hdr->header));
  85                evt_len -= (tlv_len + sizeof(tlv_hdr->header));
  86        }
  87
  88        return 0;
  89}
  90
  91/*
  92 * This function handles AP interface specific events generated by firmware.
  93 *
  94 * Event specific routines are called by this function based
  95 * upon the generated event cause.
  96 *
  97 *
  98 * Events supported for AP -
  99 *      - EVENT_UAP_STA_ASSOC
 100 *      - EVENT_UAP_STA_DEAUTH
 101 *      - EVENT_UAP_BSS_ACTIVE
 102 *      - EVENT_UAP_BSS_START
 103 *      - EVENT_UAP_BSS_IDLE
 104 *      - EVENT_UAP_MIC_COUNTERMEASURES:
 105 */
 106int mwifiex_process_uap_event(struct mwifiex_private *priv)
 107{
 108        struct mwifiex_adapter *adapter = priv->adapter;
 109        int len, i;
 110        u32 eventcause = adapter->event_cause;
 111        struct station_info *sinfo;
 112        struct mwifiex_assoc_event *event;
 113        struct mwifiex_sta_node *node;
 114        u8 *deauth_mac;
 115        struct host_cmd_ds_11n_batimeout *ba_timeout;
 116        u16 ctrl;
 117
 118        switch (eventcause) {
 119        case EVENT_UAP_STA_ASSOC:
 120                sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
 121                if (!sinfo)
 122                        return -ENOMEM;
 123
 124                event = (struct mwifiex_assoc_event *)
 125                        (adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
 126                if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
 127                        len = -1;
 128
 129                        if (ieee80211_is_assoc_req(event->frame_control))
 130                                len = 0;
 131                        else if (ieee80211_is_reassoc_req(event->frame_control))
 132                                /* There will be ETH_ALEN bytes of
 133                                 * current_ap_addr before the re-assoc ies.
 134                                 */
 135                                len = ETH_ALEN;
 136
 137                        if (len != -1) {
 138                                sinfo->assoc_req_ies = &event->data[len];
 139                                len = (u8 *)sinfo->assoc_req_ies -
 140                                      (u8 *)&event->frame_control;
 141                                sinfo->assoc_req_ies_len =
 142                                        le16_to_cpu(event->len) - (u16)len;
 143                        }
 144                }
 145                cfg80211_new_sta(priv->netdev, event->sta_addr, sinfo,
 146                                 GFP_KERNEL);
 147
 148                node = mwifiex_add_sta_entry(priv, event->sta_addr);
 149                if (!node) {
 150                        mwifiex_dbg(adapter, ERROR,
 151                                    "could not create station entry!\n");
 152                        kfree(sinfo);
 153                        return -1;
 154                }
 155
 156                if (!priv->ap_11n_enabled) {
 157                        kfree(sinfo);
 158                        break;
 159                }
 160
 161                mwifiex_set_sta_ht_cap(priv, sinfo->assoc_req_ies,
 162                                       sinfo->assoc_req_ies_len, node);
 163
 164                for (i = 0; i < MAX_NUM_TID; i++) {
 165                        if (node->is_11n_enabled)
 166                                node->ampdu_sta[i] =
 167                                              priv->aggr_prio_tbl[i].ampdu_user;
 168                        else
 169                                node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
 170                }
 171                memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
 172                kfree(sinfo);
 173                break;
 174        case EVENT_UAP_STA_DEAUTH:
 175                deauth_mac = adapter->event_body +
 176                             MWIFIEX_UAP_EVENT_EXTRA_HEADER;
 177                cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);
 178
 179                if (priv->ap_11n_enabled) {
 180                        mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
 181                        mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
 182                }
 183                mwifiex_wmm_del_peer_ra_list(priv, deauth_mac);
 184                mwifiex_del_sta_entry(priv, deauth_mac);
 185                break;
 186        case EVENT_UAP_BSS_IDLE:
 187                priv->media_connected = false;
 188                priv->port_open = false;
 189                mwifiex_clean_txrx(priv);
 190                mwifiex_del_all_sta_list(priv);
 191                break;
 192        case EVENT_UAP_BSS_ACTIVE:
 193                priv->media_connected = true;
 194                priv->port_open = true;
 195                break;
 196        case EVENT_UAP_BSS_START:
 197                mwifiex_dbg(adapter, EVENT,
 198                            "AP EVENT: event id: %#x\n", eventcause);
 199                priv->port_open = false;
 200                memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
 201                       ETH_ALEN);
 202                if (priv->hist_data)
 203                        mwifiex_hist_data_reset(priv);
 204                mwifiex_check_uap_capabilities(priv, adapter->event_skb);
 205                break;
 206        case EVENT_UAP_MIC_COUNTERMEASURES:
 207                /* For future development */
 208                mwifiex_dbg(adapter, EVENT,
 209                            "AP EVENT: event id: %#x\n", eventcause);
 210                break;
 211        case EVENT_AMSDU_AGGR_CTRL:
 212                ctrl = get_unaligned_le16(adapter->event_body);
 213                mwifiex_dbg(adapter, EVENT,
 214                            "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 215
 216                if (priv->media_connected) {
 217                        adapter->tx_buf_size =
 218                                min_t(u16, adapter->curr_tx_buf_size, ctrl);
 219                        mwifiex_dbg(adapter, EVENT,
 220                                    "event: tx_buf_size %d\n",
 221                                    adapter->tx_buf_size);
 222                }
 223                break;
 224        case EVENT_ADDBA:
 225                mwifiex_dbg(adapter, EVENT, "event: ADDBA Request\n");
 226                if (priv->media_connected)
 227                        mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
 228                                         HostCmd_ACT_GEN_SET, 0,
 229                                         adapter->event_body, false);
 230                break;
 231        case EVENT_DELBA:
 232                mwifiex_dbg(adapter, EVENT, "event: DELBA Request\n");
 233                if (priv->media_connected)
 234                        mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 235                break;
 236        case EVENT_BA_STREAM_TIEMOUT:
 237                mwifiex_dbg(adapter, EVENT, "event:  BA Stream timeout\n");
 238                if (priv->media_connected) {
 239                        ba_timeout = (void *)adapter->event_body;
 240                        mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
 241                }
 242                break;
 243        case EVENT_EXT_SCAN_REPORT:
 244                mwifiex_dbg(adapter, EVENT, "event: EXT_SCAN Report\n");
 245                if (adapter->ext_scan)
 246                        return mwifiex_handle_event_ext_scan_report(priv,
 247                                                adapter->event_skb->data);
 248                break;
 249        case EVENT_TX_STATUS_REPORT:
 250                mwifiex_dbg(adapter, EVENT, "event: TX_STATUS Report\n");
 251                mwifiex_parse_tx_status_event(priv, adapter->event_body);
 252                break;
 253        case EVENT_PS_SLEEP:
 254                mwifiex_dbg(adapter, EVENT, "info: EVENT: SLEEP\n");
 255
 256                adapter->ps_state = PS_STATE_PRE_SLEEP;
 257
 258                mwifiex_check_ps_cond(adapter);
 259                break;
 260
 261        case EVENT_PS_AWAKE:
 262                mwifiex_dbg(adapter, EVENT, "info: EVENT: AWAKE\n");
 263                if (!adapter->pps_uapsd_mode &&
 264                    priv->media_connected && adapter->sleep_period.period) {
 265                                adapter->pps_uapsd_mode = true;
 266                                mwifiex_dbg(adapter, EVENT,
 267                                            "event: PPS/UAPSD mode activated\n");
 268                }
 269                adapter->tx_lock_flag = false;
 270                if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 271                        if (mwifiex_check_last_packet_indication(priv)) {
 272                                if (adapter->data_sent ||
 273                                    (adapter->if_ops.is_port_ready &&
 274                                     !adapter->if_ops.is_port_ready(priv))) {
 275                                        adapter->ps_state = PS_STATE_AWAKE;
 276                                        adapter->pm_wakeup_card_req = false;
 277                                        adapter->pm_wakeup_fw_try = false;
 278                                        break;
 279                                }
 280                                if (!mwifiex_send_null_packet
 281                                        (priv,
 282                                         MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 283                                         MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 284                                                adapter->ps_state =
 285                                                        PS_STATE_SLEEP;
 286                                        return 0;
 287                        }
 288                }
 289                adapter->ps_state = PS_STATE_AWAKE;
 290                adapter->pm_wakeup_card_req = false;
 291                adapter->pm_wakeup_fw_try = false;
 292                break;
 293
 294        case EVENT_CHANNEL_REPORT_RDY:
 295                mwifiex_dbg(adapter, EVENT, "event: Channel Report\n");
 296                mwifiex_11h_handle_chanrpt_ready(priv, adapter->event_skb);
 297                break;
 298        case EVENT_RADAR_DETECTED:
 299                mwifiex_dbg(adapter, EVENT, "event: Radar detected\n");
 300                mwifiex_11h_handle_radar_detected(priv, adapter->event_skb);
 301                break;
 302        case EVENT_BT_COEX_WLAN_PARA_CHANGE:
 303                mwifiex_dbg(adapter, EVENT, "event: BT coex wlan param update\n");
 304                mwifiex_bt_coex_wlan_param_update_event(priv,
 305                                                        adapter->event_skb);
 306                break;
 307        case EVENT_TX_DATA_PAUSE:
 308                mwifiex_dbg(adapter, EVENT, "event: TX DATA PAUSE\n");
 309                mwifiex_process_tx_pause_event(priv, adapter->event_skb);
 310                break;
 311
 312        case EVENT_MULTI_CHAN_INFO:
 313                mwifiex_dbg(adapter, EVENT, "event: multi-chan info\n");
 314                mwifiex_process_multi_chan_event(priv, adapter->event_skb);
 315                break;
 316        case EVENT_RXBA_SYNC:
 317                dev_dbg(adapter->dev, "EVENT: RXBA_SYNC\n");
 318                mwifiex_11n_rxba_sync_event(priv, adapter->event_body,
 319                                            adapter->event_skb->len -
 320                                            sizeof(eventcause));
 321                break;
 322
 323        case EVENT_REMAIN_ON_CHAN_EXPIRED:
 324                mwifiex_dbg(adapter, EVENT,
 325                            "event: uap: Remain on channel expired\n");
 326                cfg80211_remain_on_channel_expired(&priv->wdev,
 327                                                   priv->roc_cfg.cookie,
 328                                                   &priv->roc_cfg.chan,
 329                                                   GFP_ATOMIC);
 330                memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg));
 331                break;
 332
 333        default:
 334                mwifiex_dbg(adapter, EVENT,
 335                            "event: unknown event id: %#x\n", eventcause);
 336                break;
 337        }
 338
 339        return 0;
 340}
 341
 342/* This function deletes station entry from associated station list.
 343 * Also if both AP and STA are 11n enabled, RxReorder tables and TxBA stream
 344 * tables created for this station are deleted.
 345 */
 346void mwifiex_uap_del_sta_data(struct mwifiex_private *priv,
 347                              struct mwifiex_sta_node *node)
 348{
 349        if (priv->ap_11n_enabled && node->is_11n_enabled) {
 350                mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, node->mac_addr);
 351                mwifiex_del_tx_ba_stream_tbl_by_ra(priv, node->mac_addr);
 352        }
 353        mwifiex_del_sta_entry(priv, node->mac_addr);
 354
 355        return;
 356}
 357