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
  25
  26
  27 /*
  28  * This function handles AP interface specific events generated by firmware.
  29  *
  30  * Event specific routines are called by this function based
  31  * upon the generated event cause.
  32  *
  33  *
  34  * Events supported for AP -
  35  *      - EVENT_UAP_STA_ASSOC
  36  *      - EVENT_UAP_STA_DEAUTH
  37  *      - EVENT_UAP_BSS_ACTIVE
  38  *      - EVENT_UAP_BSS_START
  39  *      - EVENT_UAP_BSS_IDLE
  40  *      - EVENT_UAP_MIC_COUNTERMEASURES:
  41  */
  42 int mwifiex_process_uap_event(struct mwifiex_private *priv)
  43 {
  44         struct mwifiex_adapter *adapter = priv->adapter;
  45         int len, i;
  46         u32 eventcause = adapter->event_cause;
  47         struct station_info sinfo;
  48         struct mwifiex_assoc_event *event;
  49         struct mwifiex_sta_node *node;
  50         u8 *deauth_mac;
  51         struct host_cmd_ds_11n_batimeout *ba_timeout;
  52         u16 ctrl;
  53
  54         switch (eventcause) {
  55         case EVENT_UAP_STA_ASSOC:
  56                 memset(&sinfo, 0, sizeof(sinfo));
  57                 event = (struct mwifiex_assoc_event *)
  58                         (adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
  59                 if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
  60                         len = -1;
  61
  62                         if (ieee80211_is_assoc_req(event->frame_control))
  63                                 len = 0;
  64                         else if (ieee80211_is_reassoc_req(event->frame_control))
  65                                 /* There will be ETH_ALEN bytes of
  66                                  * current_ap_addr before the re-assoc ies.
  67                                  */
  68                                 len = ETH_ALEN;
  69
  70                         if (len != -1) {
  71                                 sinfo.assoc_req_ies = &event->data[len];
  72                                 len = (u8 *)sinfo.assoc_req_ies -
  73                                       (u8 *)&event->frame_control;
  74                                 sinfo.assoc_req_ies_len =
  75                                         le16_to_cpu(event->len) - (u16)len;
  76                         }
  77                 }
  78                 cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
  79                                  GFP_KERNEL);
  80
  81                 node = mwifiex_add_sta_entry(priv, event->sta_addr);
  82                 if (!node) {
  83                         dev_warn(adapter->dev,
  84                                  "could not create station entry!\n");
  85                         return -1;
  86                 }
  87
  88                 if (!priv->ap_11n_enabled)
  89                         break;
  90
  91                 mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
  92                                        sinfo.assoc_req_ies_len, node);
  93
  94                 for (i = 0; i < MAX_NUM_TID; i++) {
  95                         if (node->is_11n_enabled)
  96                                 node->ampdu_sta[i] =
  97                                               priv->aggr_prio_tbl[i].ampdu_user;
  98                         else
  99                                 node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
 100                 }
 101                 memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
 102                 break;
 103         case EVENT_UAP_STA_DEAUTH:
 104                 deauth_mac = adapter->event_body +
 105                              MWIFIEX_UAP_EVENT_EXTRA_HEADER;
 106                 cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);
 107
 108                 if (priv->ap_11n_enabled) {
 109                         mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
 110                         mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
 111                 }
 112                 mwifiex_wmm_del_peer_ra_list(priv, deauth_mac);
 113                 mwifiex_del_sta_entry(priv, deauth_mac);
 114                 break;
 115         case EVENT_UAP_BSS_IDLE:
 116                 priv->media_connected = false;
 117                 if (netif_carrier_ok(priv->netdev))
 118                         netif_carrier_off(priv->netdev);
 119                 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 120
 121                 mwifiex_clean_txrx(priv);
 122                 mwifiex_del_all_sta_list(priv);
 123                 break;
 124         case EVENT_UAP_BSS_ACTIVE:
 125                 priv->media_connected = true;
 126                 if (!netif_carrier_ok(priv->netdev))
 127                         netif_carrier_on(priv->netdev);
 128                 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 129                 break;
 130         case EVENT_UAP_BSS_START:
 131                 dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
 132                 memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
 133                        ETH_ALEN);
 134                 if (priv->hist_data)
 135                         mwifiex_hist_data_reset(priv);
 136                 break;
 137         case EVENT_UAP_MIC_COUNTERMEASURES:
 138                 /* For future development */
 139                 dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
 140                 break;
 141         case EVENT_AMSDU_AGGR_CTRL:
 142                 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 143                 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 144
 145                 if (priv->media_connected) {
 146                         adapter->tx_buf_size =
 147                                 min_t(u16, adapter->curr_tx_buf_size, ctrl);
 148                         dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 149                                 adapter->tx_buf_size);
 150                 }
 151                 break;
 152         case EVENT_ADDBA:
 153                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
 154                 if (priv->media_connected)
 155                         mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
 156                                          HostCmd_ACT_GEN_SET, 0,
 157                                          adapter->event_body, false);
 158                 break;
 159         case EVENT_DELBA:
 160                 dev_dbg(adapter->dev, "event: DELBA Request\n");
 161                 if (priv->media_connected)
 162                         mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 163                 break;
 164         case EVENT_BA_STREAM_TIEMOUT:
 165                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 166                 if (priv->media_connected) {
 167                         ba_timeout = (void *)adapter->event_body;
 168                         mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
 169                 }
 170                 break;
 171         case EVENT_EXT_SCAN_REPORT:
 172                 dev_dbg(adapter->dev, "event: EXT_SCAN Report\n");
 173                 if (adapter->ext_scan)
 174                         return mwifiex_handle_event_ext_scan_report(priv,
 175                                                 adapter->event_skb->data);
 176                 break;
 177         case EVENT_TX_STATUS_REPORT:
 178                 dev_dbg(adapter->dev, "event: TX_STATUS Report\n");
 179                 mwifiex_parse_tx_status_event(priv, adapter->event_body);
 180                 break;
 181         default:
 182                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 183                         eventcause);
 184                 break;
 185         }
 186
 187         return 0;
 188 }
 189
 190 /* This function deletes station entry from associated station list.
 191  * Also if both AP and STA are 11n enabled, RxReorder tables and TxBA stream
 192  * tables created for this station are deleted.
 193  */
 194 void mwifiex_uap_del_sta_data(struct mwifiex_private *priv,
 195                               struct mwifiex_sta_node *node)
 196 {
 197         if (priv->ap_11n_enabled && node->is_11n_enabled) {
 198                 mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, node->mac_addr);
 199                 mwifiex_del_tx_ba_stream_tbl_by_ra(priv, node->mac_addr);
 200         }
 201         mwifiex_del_sta_entry(priv, node->mac_addr);
 202
 203         return;
 204 }