drivers/net/wireless/ti/wlcore/event.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include "wlcore.h"
  25 #include "debug.h"
  26 #include "io.h"
  27 #include "event.h"
  28 #include "ps.h"
  29 #include "scan.h"
  30 #include "wl12xx_80211.h"
  31 #include "hw_ops.h"
  32
  33 #define WL18XX_LOGGER_SDIO_BUFF_MAX     (0x1020)
  34 #define WL18XX_DATA_RAM_BASE_ADDRESS    (0x20000000)
  35 #define WL18XX_LOGGER_SDIO_BUFF_ADDR    (0x40159c)
  36 #define WL18XX_LOGGER_BUFF_OFFSET       (sizeof(struct fw_logger_information))
  37 #define WL18XX_LOGGER_READ_POINT_OFFSET         (12)
  38
  39 int wlcore_event_fw_logger(struct wl1271 *wl)
  40 {
  41         int ret;
  42         struct fw_logger_information fw_log;
  43         u8  *buffer;
  44         u32 internal_fw_addrbase = WL18XX_DATA_RAM_BASE_ADDRESS;
  45         u32 addr = WL18XX_LOGGER_SDIO_BUFF_ADDR;
  46         u32 end_buff_addr = WL18XX_LOGGER_SDIO_BUFF_ADDR +
  47                                 WL18XX_LOGGER_BUFF_OFFSET;
  48         u32 available_len;
  49         u32 actual_len;
  50         u32 clear_addr;
  51         size_t len;
  52         u32 start_loc;
  53
  54         buffer = kzalloc(WL18XX_LOGGER_SDIO_BUFF_MAX, GFP_KERNEL);
  55         if (!buffer) {
  56                 wl1271_error("Fail to allocate fw logger memory");
  57                 fw_log.actual_buff_size = cpu_to_le32(0);
  58                 goto out;
  59         }
  60
  61         ret = wlcore_read(wl, addr, buffer, WL18XX_LOGGER_SDIO_BUFF_MAX,
  62                           false);
  63         if (ret < 0) {
  64                 wl1271_error("Fail to read logger buffer, error_id = %d",
  65                              ret);
  66                 fw_log.actual_buff_size = cpu_to_le32(0);
  67                 goto free_out;
  68         }
  69
  70         memcpy(&fw_log, buffer, sizeof(fw_log));
  71
  72         if (le32_to_cpu(fw_log.actual_buff_size) == 0)
  73                 goto free_out;
  74
  75         actual_len = le32_to_cpu(fw_log.actual_buff_size);
  76         start_loc = (le32_to_cpu(fw_log.buff_read_ptr) -
  77                         internal_fw_addrbase) - addr;
  78         end_buff_addr += le32_to_cpu(fw_log.max_buff_size);
  79         available_len = end_buff_addr -
  80                         (le32_to_cpu(fw_log.buff_read_ptr) -
  81                                  internal_fw_addrbase);
  82         actual_len = min(actual_len, available_len);
  83         len = actual_len;
  84
  85         wl12xx_copy_fwlog(wl, &buffer[start_loc], len);
  86         clear_addr = addr + start_loc + le32_to_cpu(fw_log.actual_buff_size) +
  87                         internal_fw_addrbase;
  88
  89         len = le32_to_cpu(fw_log.actual_buff_size) - len;
  90         if (len) {
  91                 wl12xx_copy_fwlog(wl,
  92                                   &buffer[WL18XX_LOGGER_BUFF_OFFSET],
  93                                   len);
  94                 clear_addr = addr + WL18XX_LOGGER_BUFF_OFFSET + len +
  95                                 internal_fw_addrbase;
  96         }
  97
  98         /* double check that clear address and write pointer are the same */
  99         if (clear_addr != le32_to_cpu(fw_log.buff_write_ptr)) {
 100                 wl1271_error("Calculate of clear addr Clear = %x, write = %x",
 101                              clear_addr, le32_to_cpu(fw_log.buff_write_ptr));
 102         }
 103
 104         /* indicate FW about Clear buffer */
 105         ret = wlcore_write32(wl, addr + WL18XX_LOGGER_READ_POINT_OFFSET,
 106                              fw_log.buff_write_ptr);
 107 free_out:
 108         kfree(buffer);
 109 out:
 110         return le32_to_cpu(fw_log.actual_buff_size);
 111 }
 112 EXPORT_SYMBOL_GPL(wlcore_event_fw_logger);
 113
 114 void wlcore_event_rssi_trigger(struct wl1271 *wl, s8 *metric_arr)
 115 {
 116         struct wl12xx_vif *wlvif;
 117         struct ieee80211_vif *vif;
 118         enum nl80211_cqm_rssi_threshold_event event;
 119         s8 metric = metric_arr[0];
 120
 121         wl1271_debug(DEBUG_EVENT, "RSSI trigger metric: %d", metric);
 122
 123         /* TODO: check actual multi-role support */
 124         wl12xx_for_each_wlvif_sta(wl, wlvif) {
 125                 if (metric <= wlvif->rssi_thold)
 126                         event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
 127                 else
 128                         event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
 129
 130                 vif = wl12xx_wlvif_to_vif(wlvif);
 131                 if (event != wlvif->last_rssi_event)
 132                         ieee80211_cqm_rssi_notify(vif, event, metric,
 133                                                   GFP_KERNEL);
 134                 wlvif->last_rssi_event = event;
 135         }
 136 }
 137 EXPORT_SYMBOL_GPL(wlcore_event_rssi_trigger);
 138
 139 static void wl1271_stop_ba_event(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 140 {
 141         struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
 142
 143         if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
 144                 u8 hlid = wlvif->sta.hlid;
 145                 if (!wl->links[hlid].ba_bitmap)
 146                         return;
 147                 ieee80211_stop_rx_ba_session(vif, wl->links[hlid].ba_bitmap,
 148                                              vif->bss_conf.bssid);
 149         } else {
 150                 u8 hlid;
 151                 struct wl1271_link *lnk;
 152                 for_each_set_bit(hlid, wlvif->ap.sta_hlid_map,
 153                                  wl->num_links) {
 154                         lnk = &wl->links[hlid];
 155                         if (!lnk->ba_bitmap)
 156                                 continue;
 157
 158                         ieee80211_stop_rx_ba_session(vif,
 159                                                      lnk->ba_bitmap,
 160                                                      lnk->addr);
 161                 }
 162         }
 163 }
 164
 165 void wlcore_event_soft_gemini_sense(struct wl1271 *wl, u8 enable)
 166 {
 167         struct wl12xx_vif *wlvif;
 168
 169         if (enable) {
 170                 set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
 171         } else {
 172                 clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
 173                 wl12xx_for_each_wlvif_sta(wl, wlvif) {
 174                         wl1271_recalc_rx_streaming(wl, wlvif);
 175                 }
 176         }
 177 }
 178 EXPORT_SYMBOL_GPL(wlcore_event_soft_gemini_sense);
 179
 180 void wlcore_event_sched_scan_completed(struct wl1271 *wl,
 181                                        u8 status)
 182 {
 183         wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT (status 0x%0x)",
 184                      status);
 185
 186         if (wl->sched_vif) {
 187                 ieee80211_sched_scan_stopped(wl->hw);
 188                 wl->sched_vif = NULL;
 189         }
 190 }
 191 EXPORT_SYMBOL_GPL(wlcore_event_sched_scan_completed);
 192
 193 void wlcore_event_ba_rx_constraint(struct wl1271 *wl,
 194                                    unsigned long roles_bitmap,
 195                                    unsigned long allowed_bitmap)
 196 {
 197         struct wl12xx_vif *wlvif;
 198
 199         wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx allowed=0x%lx",
 200                      __func__, roles_bitmap, allowed_bitmap);
 201
 202         wl12xx_for_each_wlvif(wl, wlvif) {
 203                 if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 204                     !test_bit(wlvif->role_id , &roles_bitmap))
 205                         continue;
 206
 207                 wlvif->ba_allowed = !!test_bit(wlvif->role_id,
 208                                                &allowed_bitmap);
 209                 if (!wlvif->ba_allowed)
 210                         wl1271_stop_ba_event(wl, wlvif);
 211         }
 212 }
 213 EXPORT_SYMBOL_GPL(wlcore_event_ba_rx_constraint);
 214
 215 void wlcore_event_channel_switch(struct wl1271 *wl,
 216                                  unsigned long roles_bitmap,
 217                                  bool success)
 218 {
 219         struct wl12xx_vif *wlvif;
 220         struct ieee80211_vif *vif;
 221
 222         wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx success=%d",
 223                      __func__, roles_bitmap, success);
 224
 225         wl12xx_for_each_wlvif(wl, wlvif) {
 226                 if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 227                     !test_bit(wlvif->role_id , &roles_bitmap))
 228                         continue;
 229
 230                 if (!test_and_clear_bit(WLVIF_FLAG_CS_PROGRESS,
 231                                         &wlvif->flags))
 232                         continue;
 233
 234                 vif = wl12xx_wlvif_to_vif(wlvif);
 235
 236                 if (wlvif->bss_type == BSS_TYPE_STA_BSS) {
 237                         ieee80211_chswitch_done(vif, success);
 238                         cancel_delayed_work(&wlvif->channel_switch_work);
 239                 } else {
 240                         set_bit(WLVIF_FLAG_BEACON_DISABLED, &wlvif->flags);
 241                         ieee80211_csa_finish(vif);
 242                 }
 243         }
 244 }
 245 EXPORT_SYMBOL_GPL(wlcore_event_channel_switch);
 246
 247 void wlcore_event_dummy_packet(struct wl1271 *wl)
 248 {
 249         if (wl->plt) {
 250                 wl1271_info("Got DUMMY_PACKET event in PLT mode.  FW bug, ignoring.");
 251                 return;
 252         }
 253
 254         wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
 255         wl1271_tx_dummy_packet(wl);
 256 }
 257 EXPORT_SYMBOL_GPL(wlcore_event_dummy_packet);
 258
 259 static void wlcore_disconnect_sta(struct wl1271 *wl, unsigned long sta_bitmap)
 260 {
 261         u32 num_packets = wl->conf.tx.max_tx_retries;
 262         struct wl12xx_vif *wlvif;
 263         struct ieee80211_vif *vif;
 264         struct ieee80211_sta *sta;
 265         const u8 *addr;
 266         int h;
 267
 268         for_each_set_bit(h, &sta_bitmap, wl->num_links) {
 269                 bool found = false;
 270                 /* find the ap vif connected to this sta */
 271                 wl12xx_for_each_wlvif_ap(wl, wlvif) {
 272                         if (!test_bit(h, wlvif->ap.sta_hlid_map))
 273                                 continue;
 274                         found = true;
 275                         break;
 276                 }
 277                 if (!found)
 278                         continue;
 279
 280                 vif = wl12xx_wlvif_to_vif(wlvif);
 281                 addr = wl->links[h].addr;
 282
 283                 rcu_read_lock();
 284                 sta = ieee80211_find_sta(vif, addr);
 285                 if (sta) {
 286                         wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
 287                         ieee80211_report_low_ack(sta, num_packets);
 288                 }
 289                 rcu_read_unlock();
 290         }
 291 }
 292
 293 void wlcore_event_max_tx_failure(struct wl1271 *wl, unsigned long sta_bitmap)
 294 {
 295         wl1271_debug(DEBUG_EVENT, "MAX_TX_FAILURE_EVENT_ID");
 296         wlcore_disconnect_sta(wl, sta_bitmap);
 297 }
 298 EXPORT_SYMBOL_GPL(wlcore_event_max_tx_failure);
 299
 300 void wlcore_event_inactive_sta(struct wl1271 *wl, unsigned long sta_bitmap)
 301 {
 302         wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
 303         wlcore_disconnect_sta(wl, sta_bitmap);
 304 }
 305 EXPORT_SYMBOL_GPL(wlcore_event_inactive_sta);
 306
 307 void wlcore_event_roc_complete(struct wl1271 *wl)
 308 {
 309         wl1271_debug(DEBUG_EVENT, "REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID");
 310         if (wl->roc_vif)
 311                 ieee80211_ready_on_channel(wl->hw);
 312 }
 313 EXPORT_SYMBOL_GPL(wlcore_event_roc_complete);
 314
 315 void wlcore_event_beacon_loss(struct wl1271 *wl, unsigned long roles_bitmap)
 316 {
 317         /*
 318          * We are HW_MONITOR device. On beacon loss - queue
 319          * connection loss work. Cancel it on REGAINED event.
 320          */
 321         struct wl12xx_vif *wlvif;
 322         struct ieee80211_vif *vif;
 323         int delay = wl->conf.conn.synch_fail_thold *
 324                                 wl->conf.conn.bss_lose_timeout;
 325
 326         wl1271_info("Beacon loss detected. roles:0x%lx", roles_bitmap);
 327
 328         wl12xx_for_each_wlvif_sta(wl, wlvif) {
 329                 if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 330                     !test_bit(wlvif->role_id , &roles_bitmap))
 331                         continue;
 332
 333                 vif = wl12xx_wlvif_to_vif(wlvif);
 334
 335                 /* don't attempt roaming in case of p2p */
 336                 if (wlvif->p2p) {
 337                         ieee80211_connection_loss(vif);
 338                         continue;
 339                 }
 340
 341                 /*
 342                  * if the work is already queued, it should take place.
 343                  * We don't want to delay the connection loss
 344                  * indication any more.
 345                  */
 346                 ieee80211_queue_delayed_work(wl->hw,
 347                                              &wlvif->connection_loss_work,
 348                                              msecs_to_jiffies(delay));
 349
 350                 ieee80211_cqm_beacon_loss_notify(vif, GFP_KERNEL);
 351         }
 352 }
 353 EXPORT_SYMBOL_GPL(wlcore_event_beacon_loss);
 354
 355 int wl1271_event_unmask(struct wl1271 *wl)
 356 {
 357         int ret;
 358
 359         wl1271_debug(DEBUG_EVENT, "unmasking event_mask 0x%x", wl->event_mask);
 360         ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
 361         if (ret < 0)
 362                 return ret;
 363
 364         return 0;
 365 }
 366
 367 int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
 368 {
 369         int ret;
 370
 371         wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
 372
 373         if (mbox_num > 1)
 374                 return -EINVAL;
 375
 376         /* first we read the mbox descriptor */
 377         ret = wlcore_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
 378                           wl->mbox_size, false);
 379         if (ret < 0)
 380                 return ret;
 381
 382         /* process the descriptor */
 383         ret = wl->ops->process_mailbox_events(wl);
 384         if (ret < 0)
 385                 return ret;
 386
 387         /*
 388          * TODO: we just need this because one bit is in a different
 389          * place.  Is there any better way?
 390          */
 391         ret = wl->ops->ack_event(wl);
 392
 393         return ret;
 394 }