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, GFP_KERNEL);
 133                 wlvif->last_rssi_event = event;
 134         }
 135 }
 136 EXPORT_SYMBOL_GPL(wlcore_event_rssi_trigger);
 137
 138 static void wl1271_stop_ba_event(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 139 {
 140         struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
 141
 142         if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
 143                 u8 hlid = wlvif->sta.hlid;
 144                 if (!wl->links[hlid].ba_bitmap)
 145                         return;
 146                 ieee80211_stop_rx_ba_session(vif, wl->links[hlid].ba_bitmap,
 147                                              vif->bss_conf.bssid);
 148         } else {
 149                 u8 hlid;
 150                 struct wl1271_link *lnk;
 151                 for_each_set_bit(hlid, wlvif->ap.sta_hlid_map,
 152                                  wl->num_links) {
 153                         lnk = &wl->links[hlid];
 154                         if (!lnk->ba_bitmap)
 155                                 continue;
 156
 157                         ieee80211_stop_rx_ba_session(vif,
 158                                                      lnk->ba_bitmap,
 159                                                      lnk->addr);
 160                 }
 161         }
 162 }
 163
 164 void wlcore_event_soft_gemini_sense(struct wl1271 *wl, u8 enable)
 165 {
 166         struct wl12xx_vif *wlvif;
 167
 168         if (enable) {
 169                 set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
 170         } else {
 171                 clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
 172                 wl12xx_for_each_wlvif_sta(wl, wlvif) {
 173                         wl1271_recalc_rx_streaming(wl, wlvif);
 174                 }
 175         }
 176 }
 177 EXPORT_SYMBOL_GPL(wlcore_event_soft_gemini_sense);
 178
 179 void wlcore_event_sched_scan_completed(struct wl1271 *wl,
 180                                        u8 status)
 181 {
 182         wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT (status 0x%0x)",
 183                      status);
 184
 185         if (wl->sched_vif) {
 186                 ieee80211_sched_scan_stopped(wl->hw);
 187                 wl->sched_vif = NULL;
 188         }
 189 }
 190 EXPORT_SYMBOL_GPL(wlcore_event_sched_scan_completed);
 191
 192 void wlcore_event_ba_rx_constraint(struct wl1271 *wl,
 193                                    unsigned long roles_bitmap,
 194                                    unsigned long allowed_bitmap)
 195 {
 196         struct wl12xx_vif *wlvif;
 197
 198         wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx allowed=0x%lx",
 199                      __func__, roles_bitmap, allowed_bitmap);
 200
 201         wl12xx_for_each_wlvif(wl, wlvif) {
 202                 if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 203                     !test_bit(wlvif->role_id , &roles_bitmap))
 204                         continue;
 205
 206                 wlvif->ba_allowed = !!test_bit(wlvif->role_id,
 207                                                &allowed_bitmap);
 208                 if (!wlvif->ba_allowed)
 209                         wl1271_stop_ba_event(wl, wlvif);
 210         }
 211 }
 212 EXPORT_SYMBOL_GPL(wlcore_event_ba_rx_constraint);
 213
 214 void wlcore_event_channel_switch(struct wl1271 *wl,
 215                                  unsigned long roles_bitmap,
 216                                  bool success)
 217 {
 218         struct wl12xx_vif *wlvif;
 219         struct ieee80211_vif *vif;
 220
 221         wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx success=%d",
 222                      __func__, roles_bitmap, success);
 223
 224         wl12xx_for_each_wlvif(wl, wlvif) {
 225                 if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 226                     !test_bit(wlvif->role_id , &roles_bitmap))
 227                         continue;
 228
 229                 if (!test_and_clear_bit(WLVIF_FLAG_CS_PROGRESS,
 230                                         &wlvif->flags))
 231                         continue;
 232
 233                 vif = wl12xx_wlvif_to_vif(wlvif);
 234
 235                 if (wlvif->bss_type == BSS_TYPE_STA_BSS) {
 236                         ieee80211_chswitch_done(vif, success);
 237                         cancel_delayed_work(&wlvif->channel_switch_work);
 238                 } else {
 239                         set_bit(WLVIF_FLAG_BEACON_DISABLED, &wlvif->flags);
 240                         ieee80211_csa_finish(vif);
 241                 }
 242         }
 243 }
 244 EXPORT_SYMBOL_GPL(wlcore_event_channel_switch);
 245
 246 void wlcore_event_dummy_packet(struct wl1271 *wl)
 247 {
 248         if (wl->plt) {
 249                 wl1271_info("Got DUMMY_PACKET event in PLT mode.  FW bug, ignoring.");
 250                 return;
 251         }
 252
 253         wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
 254         wl1271_tx_dummy_packet(wl);
 255 }
 256 EXPORT_SYMBOL_GPL(wlcore_event_dummy_packet);
 257
 258 static void wlcore_disconnect_sta(struct wl1271 *wl, unsigned long sta_bitmap)
 259 {
 260         u32 num_packets = wl->conf.tx.max_tx_retries;
 261         struct wl12xx_vif *wlvif;
 262         struct ieee80211_vif *vif;
 263         struct ieee80211_sta *sta;
 264         const u8 *addr;
 265         int h;
 266
 267         for_each_set_bit(h, &sta_bitmap, wl->num_links) {
 268                 bool found = false;
 269                 /* find the ap vif connected to this sta */
 270                 wl12xx_for_each_wlvif_ap(wl, wlvif) {
 271                         if (!test_bit(h, wlvif->ap.sta_hlid_map))
 272                                 continue;
 273                         found = true;
 274                         break;
 275                 }
 276                 if (!found)
 277                         continue;
 278
 279                 vif = wl12xx_wlvif_to_vif(wlvif);
 280                 addr = wl->links[h].addr;
 281
 282                 rcu_read_lock();
 283                 sta = ieee80211_find_sta(vif, addr);
 284                 if (sta) {
 285                         wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
 286                         ieee80211_report_low_ack(sta, num_packets);
 287                 }
 288                 rcu_read_unlock();
 289         }
 290 }
 291
 292 void wlcore_event_max_tx_failure(struct wl1271 *wl, unsigned long sta_bitmap)
 293 {
 294         wl1271_debug(DEBUG_EVENT, "MAX_TX_FAILURE_EVENT_ID");
 295         wlcore_disconnect_sta(wl, sta_bitmap);
 296 }
 297 EXPORT_SYMBOL_GPL(wlcore_event_max_tx_failure);
 298
 299 void wlcore_event_inactive_sta(struct wl1271 *wl, unsigned long sta_bitmap)
 300 {
 301         wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
 302         wlcore_disconnect_sta(wl, sta_bitmap);
 303 }
 304 EXPORT_SYMBOL_GPL(wlcore_event_inactive_sta);
 305
 306 void wlcore_event_roc_complete(struct wl1271 *wl)
 307 {
 308         wl1271_debug(DEBUG_EVENT, "REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID");
 309         if (wl->roc_vif)
 310                 ieee80211_ready_on_channel(wl->hw);
 311 }
 312 EXPORT_SYMBOL_GPL(wlcore_event_roc_complete);
 313
 314 void wlcore_event_beacon_loss(struct wl1271 *wl, unsigned long roles_bitmap)
 315 {
 316         /*
 317          * We are HW_MONITOR device. On beacon loss - queue
 318          * connection loss work. Cancel it on REGAINED event.
 319          */
 320         struct wl12xx_vif *wlvif;
 321         struct ieee80211_vif *vif;
 322         int delay = wl->conf.conn.synch_fail_thold *
 323                                 wl->conf.conn.bss_lose_timeout;
 324
 325         wl1271_info("Beacon loss detected. roles:0x%lx", roles_bitmap);
 326
 327         wl12xx_for_each_wlvif_sta(wl, wlvif) {
 328                 if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 329                     !test_bit(wlvif->role_id , &roles_bitmap))
 330                         continue;
 331
 332                 vif = wl12xx_wlvif_to_vif(wlvif);
 333
 334                 /* don't attempt roaming in case of p2p */
 335                 if (wlvif->p2p) {
 336                         ieee80211_connection_loss(vif);
 337                         continue;
 338                 }
 339
 340                 /*
 341                  * if the work is already queued, it should take place.
 342                  * We don't want to delay the connection loss
 343                  * indication any more.
 344                  */
 345                 ieee80211_queue_delayed_work(wl->hw,
 346                                              &wlvif->connection_loss_work,
 347                                              msecs_to_jiffies(delay));
 348
 349                 ieee80211_cqm_beacon_loss_notify(vif, GFP_KERNEL);
 350         }
 351 }
 352 EXPORT_SYMBOL_GPL(wlcore_event_beacon_loss);
 353
 354 int wl1271_event_unmask(struct wl1271 *wl)
 355 {
 356         int ret;
 357
 358         wl1271_debug(DEBUG_EVENT, "unmasking event_mask 0x%x", wl->event_mask);
 359         ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
 360         if (ret < 0)
 361                 return ret;
 362
 363         return 0;
 364 }
 365
 366 int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
 367 {
 368         int ret;
 369
 370         wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
 371
 372         if (mbox_num > 1)
 373                 return -EINVAL;
 374
 375         /* first we read the mbox descriptor */
 376         ret = wlcore_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
 377                           wl->mbox_size, false);
 378         if (ret < 0)
 379                 return ret;
 380
 381         /* process the descriptor */
 382         ret = wl->ops->process_mailbox_events(wl);
 383         if (ret < 0)
 384                 return ret;
 385
 386         /*
 387          * TODO: we just need this because one bit is in a different
 388          * place.  Is there any better way?
 389          */
 390         ret = wl->ops->ack_event(wl);
 391
 392         return ret;
 393 }