drivers/net/wireless/mwifiex/uap_event.c

   1 /*
   2  * Marvell Wireless LAN device driver: AP event handling
   3  *
   4  * Copyright (C) 2012, 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.filled = STATION_INFO_ASSOC_REQ_IES;
  72                                 sinfo.assoc_req_ies = &event->data[len];
  73                                 len = (u8 *)sinfo.assoc_req_ies -
  74                                       (u8 *)&event->frame_control;
  75                                 sinfo.assoc_req_ies_len =
  76                                         le16_to_cpu(event->len) - (u16)len;
  77                         }
  78                 }
  79                 cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
  80                                  GFP_KERNEL);
  81
  82                 node = mwifiex_add_sta_entry(priv, event->sta_addr);
  83                 if (!node) {
  84                         dev_warn(adapter->dev,
  85                                  "could not create station entry!\n");
  86                         return -1;
  87                 }
  88
  89                 if (!priv->ap_11n_enabled)
  90                         break;
  91
  92                 mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
  93                                        sinfo.assoc_req_ies_len, node);
  94
  95                 for (i = 0; i < MAX_NUM_TID; i++) {
  96                         if (node->is_11n_enabled)
  97                                 node->ampdu_sta[i] =
  98                                               priv->aggr_prio_tbl[i].ampdu_user;
  99                         else
 100                                 node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
 101                 }
 102                 memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
 103                 break;
 104         case EVENT_UAP_STA_DEAUTH:
 105                 deauth_mac = adapter->event_body +
 106                              MWIFIEX_UAP_EVENT_EXTRA_HEADER;
 107                 cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);
 108
 109                 if (priv->ap_11n_enabled) {
 110                         mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
 111                         mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
 112                 }
 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                 break;
 135         case EVENT_UAP_MIC_COUNTERMEASURES:
 136                 /* For future development */
 137                 dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
 138                 break;
 139         case EVENT_AMSDU_AGGR_CTRL:
 140                 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 141                 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 142
 143                 if (priv->media_connected) {
 144                         adapter->tx_buf_size =
 145                                 min_t(u16, adapter->curr_tx_buf_size, ctrl);
 146                         dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 147                                 adapter->tx_buf_size);
 148                 }
 149                 break;
 150         case EVENT_ADDBA:
 151                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
 152                 if (priv->media_connected)
 153                         mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
 154                                          HostCmd_ACT_GEN_SET, 0,
 155                                          adapter->event_body, false);
 156                 break;
 157         case EVENT_DELBA:
 158                 dev_dbg(adapter->dev, "event: DELBA Request\n");
 159                 if (priv->media_connected)
 160                         mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 161                 break;
 162         case EVENT_BA_STREAM_TIEMOUT:
 163                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 164                 if (priv->media_connected) {
 165                         ba_timeout = (void *)adapter->event_body;
 166                         mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
 167                 }
 168                 break;
 169         case EVENT_EXT_SCAN_REPORT:
 170                 dev_dbg(adapter->dev, "event: EXT_SCAN Report\n");
 171                 if (adapter->ext_scan)
 172                         return mwifiex_handle_event_ext_scan_report(priv,
 173                                                 adapter->event_skb->data);
 174                 break;
 175         default:
 176                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 177                         eventcause);
 178                 break;
 179         }
 180
 181         return 0;
 182 }
 183
 184 /* This function deletes station entry from associated station list.
 185  * Also if both AP and STA are 11n enabled, RxReorder tables and TxBA stream
 186  * tables created for this station are deleted.
 187  */
 188 void mwifiex_uap_del_sta_data(struct mwifiex_private *priv,
 189                               struct mwifiex_sta_node *node)
 190 {
 191         if (priv->ap_11n_enabled && node->is_11n_enabled) {
 192                 mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, node->mac_addr);
 193                 mwifiex_del_tx_ba_stream_tbl_by_ra(priv, node->mac_addr);
 194         }
 195         mwifiex_del_sta_entry(priv, node->mac_addr);
 196
 197         return;
 198 }