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_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        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                memset(&sinfo, 0, sizeof(sinfo));
 121                event = (struct mwifiex_assoc_event *)
 122                        (adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
 123                if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
 124                        len = -1;
 125
 126                        if (ieee80211_is_assoc_req(event->frame_control))
 127                                len = 0;
 128                        else if (ieee80211_is_reassoc_req(event->frame_control))
 129                                /* There will be ETH_ALEN bytes of
 130                                 * current_ap_addr before the re-assoc ies.
 131                                 */
 132                                len = ETH_ALEN;
 133
 134                        if (len != -1) {
 135                                sinfo.assoc_req_ies = &event->data[len];
 136                                len = (u8 *)sinfo.assoc_req_ies -
 137                                      (u8 *)&event->frame_control;
 138                                sinfo.assoc_req_ies_len =
 139                                        le16_to_cpu(event->len) - (u16)len;
 140                        }
 141                }
 142                cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
 143                                 GFP_KERNEL);
 144
 145                node = mwifiex_add_sta_entry(priv, event->sta_addr);
 146                if (!node) {
 147                        mwifiex_dbg(adapter, ERROR,
 148                                    "could not create station entry!\n");
 149                        return -1;
 150                }
 151
 152                if (!priv->ap_11n_enabled)
 153                        break;
 154
 155                mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
 156                                       sinfo.assoc_req_ies_len, node);
 157
 158                for (i = 0; i < MAX_NUM_TID; i++) {
 159                        if (node->is_11n_enabled)
 160                                node->ampdu_sta[i] =
 161                                              priv->aggr_prio_tbl[i].ampdu_user;
 162                        else
 163                                node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
 164                }
 165                memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
 166                break;
 167        case EVENT_UAP_STA_DEAUTH:
 168                deauth_mac = adapter->event_body +
 169                             MWIFIEX_UAP_EVENT_EXTRA_HEADER;
 170                cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);
 171
 172                if (priv->ap_11n_enabled) {
 173                        mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
 174                        mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
 175                }
 176                mwifiex_wmm_del_peer_ra_list(priv, deauth_mac);
 177                mwifiex_del_sta_entry(priv, deauth_mac);
 178                break;
 179        case EVENT_UAP_BSS_IDLE:
 180                priv->media_connected = false;
 181                priv->port_open = false;
 182                mwifiex_clean_txrx(priv);
 183                mwifiex_del_all_sta_list(priv);
 184                break;
 185        case EVENT_UAP_BSS_ACTIVE:
 186                priv->media_connected = true;
 187                priv->port_open = true;
 188                break;
 189        case EVENT_UAP_BSS_START:
 190                mwifiex_dbg(adapter, EVENT,
 191                            "AP EVENT: event id: %#x\n", eventcause);
 192                priv->port_open = false;
 193                memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
 194                       ETH_ALEN);
 195                if (priv->hist_data)
 196                        mwifiex_hist_data_reset(priv);
 197                mwifiex_check_uap_capabilties(priv, adapter->event_skb);
 198                break;
 199        case EVENT_UAP_MIC_COUNTERMEASURES:
 200                /* For future development */
 201                mwifiex_dbg(adapter, EVENT,
 202                            "AP EVENT: event id: %#x\n", eventcause);
 203                break;
 204        case EVENT_AMSDU_AGGR_CTRL:
 205                ctrl = get_unaligned_le16(adapter->event_body);
 206                mwifiex_dbg(adapter, EVENT,
 207                            "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 208
 209                if (priv->media_connected) {
 210                        adapter->tx_buf_size =
 211                                min_t(u16, adapter->curr_tx_buf_size, ctrl);
 212                        mwifiex_dbg(adapter, EVENT,
 213                                    "event: tx_buf_size %d\n",
 214                                    adapter->tx_buf_size);
 215                }
 216                break;
 217        case EVENT_ADDBA:
 218                mwifiex_dbg(adapter, EVENT, "event: ADDBA Request\n");
 219                if (priv->media_connected)
 220                        mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
 221                                         HostCmd_ACT_GEN_SET, 0,
 222                                         adapter->event_body, false);
 223                break;
 224        case EVENT_DELBA:
 225                mwifiex_dbg(adapter, EVENT, "event: DELBA Request\n");
 226                if (priv->media_connected)
 227                        mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 228                break;
 229        case EVENT_BA_STREAM_TIEMOUT:
 230                mwifiex_dbg(adapter, EVENT, "event:  BA Stream timeout\n");
 231                if (priv->media_connected) {
 232                        ba_timeout = (void *)adapter->event_body;
 233                        mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
 234                }
 235                break;
 236        case EVENT_EXT_SCAN_REPORT:
 237                mwifiex_dbg(adapter, EVENT, "event: EXT_SCAN Report\n");
 238                if (adapter->ext_scan)
 239                        return mwifiex_handle_event_ext_scan_report(priv,
 240                                                adapter->event_skb->data);
 241                break;
 242        case EVENT_TX_STATUS_REPORT:
 243                mwifiex_dbg(adapter, EVENT, "event: TX_STATUS Report\n");
 244                mwifiex_parse_tx_status_event(priv, adapter->event_body);
 245                break;
 246        case EVENT_PS_SLEEP:
 247                mwifiex_dbg(adapter, EVENT, "info: EVENT: SLEEP\n");
 248
 249                adapter->ps_state = PS_STATE_PRE_SLEEP;
 250
 251                mwifiex_check_ps_cond(adapter);
 252                break;
 253
 254        case EVENT_PS_AWAKE:
 255                mwifiex_dbg(adapter, EVENT, "info: EVENT: AWAKE\n");
 256                if (!adapter->pps_uapsd_mode &&
 257                    priv->media_connected && adapter->sleep_period.period) {
 258                                adapter->pps_uapsd_mode = true;
 259                                mwifiex_dbg(adapter, EVENT,
 260                                            "event: PPS/UAPSD mode activated\n");
 261                }
 262                adapter->tx_lock_flag = false;
 263                if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 264                        if (mwifiex_check_last_packet_indication(priv)) {
 265                                if (adapter->data_sent ||
 266                                    (adapter->if_ops.is_port_ready &&
 267                                     !adapter->if_ops.is_port_ready(priv))) {
 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        case EVENT_BT_COEX_WLAN_PARA_CHANGE:
 296                dev_err(adapter->dev, "EVENT: BT coex wlan param update\n");
 297                mwifiex_bt_coex_wlan_param_update_event(priv,
 298                                                        adapter->event_skb);
 299                break;
 300        case EVENT_TX_DATA_PAUSE:
 301                mwifiex_dbg(adapter, EVENT, "event: TX DATA PAUSE\n");
 302                mwifiex_process_tx_pause_event(priv, adapter->event_skb);
 303                break;
 304
 305        case EVENT_MULTI_CHAN_INFO:
 306                mwifiex_dbg(adapter, EVENT, "event: multi-chan info\n");
 307                mwifiex_process_multi_chan_event(priv, adapter->event_skb);
 308                break;
 309        case EVENT_RXBA_SYNC:
 310                dev_dbg(adapter->dev, "EVENT: RXBA_SYNC\n");
 311                mwifiex_11n_rxba_sync_event(priv, adapter->event_body,
 312                                            adapter->event_skb->len -
 313                                            sizeof(eventcause));
 314                break;
 315
 316        case EVENT_REMAIN_ON_CHAN_EXPIRED:
 317                mwifiex_dbg(adapter, EVENT,
 318                            "event: uap: Remain on channel expired\n");
 319                cfg80211_remain_on_channel_expired(&priv->wdev,
 320                                                   priv->roc_cfg.cookie,
 321                                                   &priv->roc_cfg.chan,
 322                                                   GFP_ATOMIC);
 323                memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg));
 324                break;
 325
 326        default:
 327                mwifiex_dbg(adapter, EVENT,
 328                            "event: unknown event id: %#x\n", eventcause);
 329                break;
 330        }
 331
 332        return 0;
 333}
 334
 335/* This function deletes station entry from associated station list.
 336 * Also if both AP and STA are 11n enabled, RxReorder tables and TxBA stream
 337 * tables created for this station are deleted.
 338 */
 339void mwifiex_uap_del_sta_data(struct mwifiex_private *priv,
 340                              struct mwifiex_sta_node *node)
 341{
 342        if (priv->ap_11n_enabled && node->is_11n_enabled) {
 343                mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, node->mac_addr);
 344                mwifiex_del_tx_ba_stream_tbl_by_ra(priv, node->mac_addr);
 345        }
 346        mwifiex_del_sta_entry(priv, node->mac_addr);
 347
 348        return;
 349}
 350