Pileus Git - ~andy/linux/blob - drivers/net/wireless/libertas/cmdresp.c

   1 /**
   2   * This file contains the handling of command
   3   * responses as well as events generated by firmware.
   4   */
   5 #include <linux/slab.h>
   6 #include <linux/delay.h>
   7 #include <linux/sched.h>
   8 #include <asm/unaligned.h>
   9 #include <net/cfg80211.h>
  10
  11 #include "cfg.h"
  12 #include "cmd.h"
  13
  14 /**
  15  *  @brief This function handles disconnect event. it
  16  *  reports disconnect to upper layer, clean tx/rx packets,
  17  *  reset link state etc.
  18  *
  19  *  @param priv    A pointer to struct lbs_private structure
  20  *  @return        n/a
  21  */
  22 void lbs_mac_event_disconnected(struct lbs_private *priv)
  23 {
  24         if (priv->connect_status != LBS_CONNECTED)
  25                 return;
  26
  27         lbs_deb_enter(LBS_DEB_ASSOC);
  28
  29         /*
  30          * Cisco AP sends EAP failure and de-auth in less than 0.5 ms.
  31          * It causes problem in the Supplicant
  32          */
  33         msleep_interruptible(1000);
  34
  35         if (priv->wdev->iftype == NL80211_IFTYPE_STATION)
  36                 lbs_send_disconnect_notification(priv);
  37
  38         /* report disconnect to upper layer */
  39         netif_stop_queue(priv->dev);
  40         netif_carrier_off(priv->dev);
  41
  42         /* Free Tx and Rx packets */
  43         kfree_skb(priv->currenttxskb);
  44         priv->currenttxskb = NULL;
  45         priv->tx_pending_len = 0;
  46
  47         priv->connect_status = LBS_DISCONNECTED;
  48
  49         if (priv->psstate != PS_STATE_FULL_POWER) {
  50                 /* make firmware to exit PS mode */
  51                 lbs_deb_cmd("disconnected, so exit PS mode\n");
  52                 lbs_ps_wakeup(priv, 0);
  53         }
  54         lbs_deb_leave(LBS_DEB_ASSOC);
  55 }
  56
  57 static int lbs_ret_reg_access(struct lbs_private *priv,
  58                                u16 type, struct cmd_ds_command *resp)
  59 {
  60         int ret = 0;
  61
  62         lbs_deb_enter(LBS_DEB_CMD);
  63
  64         switch (type) {
  65         case CMD_RET(CMD_MAC_REG_ACCESS):
  66                 {
  67                         struct cmd_ds_mac_reg_access *reg = &resp->params.macreg;
  68
  69                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
  70                         priv->offsetvalue.value = le32_to_cpu(reg->value);
  71                         break;
  72                 }
  73
  74         case CMD_RET(CMD_BBP_REG_ACCESS):
  75                 {
  76                         struct cmd_ds_bbp_reg_access *reg = &resp->params.bbpreg;
  77
  78                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
  79                         priv->offsetvalue.value = reg->value;
  80                         break;
  81                 }
  82
  83         case CMD_RET(CMD_RF_REG_ACCESS):
  84                 {
  85                         struct cmd_ds_rf_reg_access *reg = &resp->params.rfreg;
  86
  87                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
  88                         priv->offsetvalue.value = reg->value;
  89                         break;
  90                 }
  91
  92         default:
  93                 ret = -1;
  94         }
  95
  96         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
  97         return ret;
  98 }
  99
 100 /**
 101  *  @brief This function parses countryinfo from AP and download country info to FW
 102  *  @param priv    pointer to struct lbs_private
 103  *  @param resp    pointer to command response buffer
 104  *  @return        0; -1
 105  */
 106 static int lbs_ret_802_11d_domain_info(struct cmd_ds_command *resp)
 107 {
 108         struct cmd_ds_802_11d_domain_info *domaininfo =
 109                         &resp->params.domaininforesp;
 110         struct mrvl_ie_domain_param_set *domain = &domaininfo->domain;
 111         u16 action = le16_to_cpu(domaininfo->action);
 112         s16 ret = 0;
 113         u8 nr_triplet = 0;
 114
 115         lbs_deb_enter(LBS_DEB_11D);
 116
 117         lbs_deb_hex(LBS_DEB_11D, "domain info resp", (u8 *) resp,
 118                         (int)le16_to_cpu(resp->size));
 119
 120         nr_triplet = (le16_to_cpu(domain->header.len) - COUNTRY_CODE_LEN) /
 121                 sizeof(struct ieee80211_country_ie_triplet);
 122
 123         lbs_deb_11d("domain info resp: nr_triplet %d\n", nr_triplet);
 124
 125         if (nr_triplet > MRVDRV_MAX_TRIPLET_802_11D) {
 126                 lbs_deb_11d("invalid number of triplets returned!!\n");
 127                 return -1;
 128         }
 129
 130         switch (action) {
 131         case CMD_ACT_SET:       /*Proc set action */
 132                 break;
 133
 134         case CMD_ACT_GET:
 135                 break;
 136         default:
 137                 lbs_deb_11d("invalid action:%d\n", domaininfo->action);
 138                 ret = -1;
 139                 break;
 140         }
 141
 142         lbs_deb_leave_args(LBS_DEB_11D, "ret %d", ret);
 143         return ret;
 144 }
 145
 146 static inline int handle_cmd_response(struct lbs_private *priv,
 147                                       struct cmd_header *cmd_response)
 148 {
 149         struct cmd_ds_command *resp = (struct cmd_ds_command *) cmd_response;
 150         int ret = 0;
 151         unsigned long flags;
 152         uint16_t respcmd = le16_to_cpu(resp->command);
 153
 154         lbs_deb_enter(LBS_DEB_HOST);
 155
 156         switch (respcmd) {
 157         case CMD_RET(CMD_MAC_REG_ACCESS):
 158         case CMD_RET(CMD_BBP_REG_ACCESS):
 159         case CMD_RET(CMD_RF_REG_ACCESS):
 160                 ret = lbs_ret_reg_access(priv, respcmd, resp);
 161                 break;
 162
 163         case CMD_RET(CMD_802_11_SET_AFC):
 164         case CMD_RET(CMD_802_11_GET_AFC):
 165                 spin_lock_irqsave(&priv->driver_lock, flags);
 166                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.afc,
 167                         sizeof(struct cmd_ds_802_11_afc));
 168                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 169
 170                 break;
 171
 172         case CMD_RET(CMD_802_11_BEACON_STOP):
 173                 break;
 174
 175         case CMD_RET(CMD_802_11_RSSI):
 176                 ret = lbs_ret_802_11_rssi(priv, resp);
 177                 break;
 178
 179         case CMD_RET(CMD_802_11D_DOMAIN_INFO):
 180                 ret = lbs_ret_802_11d_domain_info(resp);
 181                 break;
 182
 183         case CMD_RET(CMD_802_11_TPC_CFG):
 184                 spin_lock_irqsave(&priv->driver_lock, flags);
 185                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.tpccfg,
 186                         sizeof(struct cmd_ds_802_11_tpc_cfg));
 187                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 188                 break;
 189
 190         case CMD_RET(CMD_BT_ACCESS):
 191                 spin_lock_irqsave(&priv->driver_lock, flags);
 192                 if (priv->cur_cmd->callback_arg)
 193                         memcpy((void *)priv->cur_cmd->callback_arg,
 194                                &resp->params.bt.addr1, 2 * ETH_ALEN);
 195                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 196                 break;
 197         case CMD_RET(CMD_FWT_ACCESS):
 198                 spin_lock_irqsave(&priv->driver_lock, flags);
 199                 if (priv->cur_cmd->callback_arg)
 200                         memcpy((void *)priv->cur_cmd->callback_arg, &resp->params.fwt,
 201                                sizeof(resp->params.fwt));
 202                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 203                 break;
 204         case CMD_RET(CMD_802_11_BEACON_CTRL):
 205                 ret = lbs_ret_802_11_bcn_ctrl(priv, resp);
 206                 break;
 207
 208         default:
 209                 lbs_pr_err("CMD_RESP: unknown cmd response 0x%04x\n",
 210                            le16_to_cpu(resp->command));
 211                 break;
 212         }
 213         lbs_deb_leave(LBS_DEB_HOST);
 214         return ret;
 215 }
 216
 217 int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
 218 {
 219         uint16_t respcmd, curcmd;
 220         struct cmd_header *resp;
 221         int ret = 0;
 222         unsigned long flags;
 223         uint16_t result;
 224
 225         lbs_deb_enter(LBS_DEB_HOST);
 226
 227         mutex_lock(&priv->lock);
 228         spin_lock_irqsave(&priv->driver_lock, flags);
 229
 230         if (!priv->cur_cmd) {
 231                 lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");
 232                 ret = -1;
 233                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 234                 goto done;
 235         }
 236
 237         resp = (void *)data;
 238         curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
 239         respcmd = le16_to_cpu(resp->command);
 240         result = le16_to_cpu(resp->result);
 241
 242         lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n",
 243                      respcmd, le16_to_cpu(resp->seqnum), len);
 244         lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len);
 245
 246         if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
 247                 lbs_pr_info("Received CMD_RESP with invalid sequence %d (expected %d)\n",
 248                             le16_to_cpu(resp->seqnum), le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum));
 249                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 250                 ret = -1;
 251                 goto done;
 252         }
 253         if (respcmd != CMD_RET(curcmd) &&
 254             respcmd != CMD_RET_802_11_ASSOCIATE && curcmd != CMD_802_11_ASSOCIATE) {
 255                 lbs_pr_info("Invalid CMD_RESP %x to command %x!\n", respcmd, curcmd);
 256                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 257                 ret = -1;
 258                 goto done;
 259         }
 260
 261         if (resp->result == cpu_to_le16(0x0004)) {
 262                 /* 0x0004 means -EAGAIN. Drop the response, let it time out
 263                    and be resubmitted */
 264                 lbs_pr_info("Firmware returns DEFER to command %x. Will let it time out...\n",
 265                             le16_to_cpu(resp->command));
 266                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 267                 ret = -1;
 268                 goto done;
 269         }
 270
 271         /* Now we got response from FW, cancel the command timer */
 272         del_timer(&priv->command_timer);
 273         priv->cmd_timed_out = 0;
 274
 275         /* Store the response code to cur_cmd_retcode. */
 276         priv->cur_cmd_retcode = result;
 277
 278         if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {
 279                 struct cmd_ds_802_11_ps_mode *psmode = (void *) &resp[1];
 280                 u16 action = le16_to_cpu(psmode->action);
 281
 282                 lbs_deb_host(
 283                        "CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",
 284                        result, action);
 285
 286                 if (result) {
 287                         lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",
 288                                     result);
 289                         /*
 290                          * We should not re-try enter-ps command in
 291                          * ad-hoc mode. It takes place in
 292                          * lbs_execute_next_command().
 293                          */
 294                         if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR &&
 295                             action == CMD_SUBCMD_ENTER_PS)
 296                                 priv->psmode = LBS802_11POWERMODECAM;
 297                 } else if (action == CMD_SUBCMD_ENTER_PS) {
 298                         priv->needtowakeup = 0;
 299                         priv->psstate = PS_STATE_AWAKE;
 300
 301                         lbs_deb_host("CMD_RESP: ENTER_PS command response\n");
 302                         if (priv->connect_status != LBS_CONNECTED) {
 303                                 /*
 304                                  * When Deauth Event received before Enter_PS command
 305                                  * response, We need to wake up the firmware.
 306                                  */
 307                                 lbs_deb_host(
 308                                        "disconnected, invoking lbs_ps_wakeup\n");
 309
 310                                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 311                                 mutex_unlock(&priv->lock);
 312                                 lbs_ps_wakeup(priv, 0);
 313                                 mutex_lock(&priv->lock);
 314                                 spin_lock_irqsave(&priv->driver_lock, flags);
 315                         }
 316                 } else if (action == CMD_SUBCMD_EXIT_PS) {
 317                         priv->needtowakeup = 0;
 318                         priv->psstate = PS_STATE_FULL_POWER;
 319                         lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
 320                 } else {
 321                         lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);
 322                 }
 323
 324                 lbs_complete_command(priv, priv->cur_cmd, result);
 325                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 326
 327                 ret = 0;
 328                 goto done;
 329         }
 330
 331         /* If the command is not successful, cleanup and return failure */
 332         if ((result != 0 || !(respcmd & 0x8000))) {
 333                 lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",
 334                        result, respcmd);
 335                 /*
 336                  * Handling errors here
 337                  */
 338                 switch (respcmd) {
 339                 case CMD_RET(CMD_GET_HW_SPEC):
 340                 case CMD_RET(CMD_802_11_RESET):
 341                         lbs_deb_host("CMD_RESP: reset failed\n");
 342                         break;
 343
 344                 }
 345                 lbs_complete_command(priv, priv->cur_cmd, result);
 346                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 347
 348                 ret = -1;
 349                 goto done;
 350         }
 351
 352         spin_unlock_irqrestore(&priv->driver_lock, flags);
 353
 354         if (priv->cur_cmd && priv->cur_cmd->callback) {
 355                 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
 356                                 resp);
 357         } else
 358                 ret = handle_cmd_response(priv, resp);
 359
 360         spin_lock_irqsave(&priv->driver_lock, flags);
 361
 362         if (priv->cur_cmd) {
 363                 /* Clean up and Put current command back to cmdfreeq */
 364                 lbs_complete_command(priv, priv->cur_cmd, result);
 365         }
 366         spin_unlock_irqrestore(&priv->driver_lock, flags);
 367
 368 done:
 369         mutex_unlock(&priv->lock);
 370         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
 371         return ret;
 372 }
 373
 374 int lbs_process_event(struct lbs_private *priv, u32 event)
 375 {
 376         int ret = 0;
 377         struct cmd_header cmd;
 378
 379         lbs_deb_enter(LBS_DEB_CMD);
 380
 381         switch (event) {
 382         case MACREG_INT_CODE_LINK_SENSED:
 383                 lbs_deb_cmd("EVENT: link sensed\n");
 384                 break;
 385
 386         case MACREG_INT_CODE_DEAUTHENTICATED:
 387                 lbs_deb_cmd("EVENT: deauthenticated\n");
 388                 lbs_mac_event_disconnected(priv);
 389                 break;
 390
 391         case MACREG_INT_CODE_DISASSOCIATED:
 392                 lbs_deb_cmd("EVENT: disassociated\n");
 393                 lbs_mac_event_disconnected(priv);
 394                 break;
 395
 396         case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
 397                 lbs_deb_cmd("EVENT: link lost\n");
 398                 lbs_mac_event_disconnected(priv);
 399                 break;
 400
 401         case MACREG_INT_CODE_PS_SLEEP:
 402                 lbs_deb_cmd("EVENT: ps sleep\n");
 403
 404                 /* handle unexpected PS SLEEP event */
 405                 if (priv->psstate == PS_STATE_FULL_POWER) {
 406                         lbs_deb_cmd(
 407                                "EVENT: in FULL POWER mode, ignoreing PS_SLEEP\n");
 408                         break;
 409                 }
 410                 priv->psstate = PS_STATE_PRE_SLEEP;
 411
 412                 lbs_ps_confirm_sleep(priv);
 413
 414                 break;
 415
 416         case MACREG_INT_CODE_HOST_AWAKE:
 417                 lbs_deb_cmd("EVENT: host awake\n");
 418                 if (priv->reset_deep_sleep_wakeup)
 419                         priv->reset_deep_sleep_wakeup(priv);
 420                 priv->is_deep_sleep = 0;
 421                 lbs_cmd_async(priv, CMD_802_11_WAKEUP_CONFIRM, &cmd,
 422                                 sizeof(cmd));
 423                 priv->is_host_sleep_activated = 0;
 424                 wake_up_interruptible(&priv->host_sleep_q);
 425                 break;
 426
 427         case MACREG_INT_CODE_DEEP_SLEEP_AWAKE:
 428                 if (priv->reset_deep_sleep_wakeup)
 429                         priv->reset_deep_sleep_wakeup(priv);
 430                 lbs_deb_cmd("EVENT: ds awake\n");
 431                 priv->is_deep_sleep = 0;
 432                 priv->wakeup_dev_required = 0;
 433                 wake_up_interruptible(&priv->ds_awake_q);
 434                 break;
 435
 436         case MACREG_INT_CODE_PS_AWAKE:
 437                 lbs_deb_cmd("EVENT: ps awake\n");
 438                 /* handle unexpected PS AWAKE event */
 439                 if (priv->psstate == PS_STATE_FULL_POWER) {
 440                         lbs_deb_cmd(
 441                                "EVENT: In FULL POWER mode - ignore PS AWAKE\n");
 442                         break;
 443                 }
 444
 445                 priv->psstate = PS_STATE_AWAKE;
 446
 447                 if (priv->needtowakeup) {
 448                         /*
 449                          * wait for the command processing to finish
 450                          * before resuming sending
 451                          * priv->needtowakeup will be set to FALSE
 452                          * in lbs_ps_wakeup()
 453                          */
 454                         lbs_deb_cmd("waking up ...\n");
 455                         lbs_ps_wakeup(priv, 0);
 456                 }
 457                 break;
 458
 459         case MACREG_INT_CODE_MIC_ERR_UNICAST:
 460                 lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");
 461                 lbs_send_mic_failureevent(priv, event);
 462                 break;
 463
 464         case MACREG_INT_CODE_MIC_ERR_MULTICAST:
 465                 lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");
 466                 lbs_send_mic_failureevent(priv, event);
 467                 break;
 468
 469         case MACREG_INT_CODE_MIB_CHANGED:
 470                 lbs_deb_cmd("EVENT: MIB CHANGED\n");
 471                 break;
 472         case MACREG_INT_CODE_INIT_DONE:
 473                 lbs_deb_cmd("EVENT: INIT DONE\n");
 474                 break;
 475         case MACREG_INT_CODE_ADHOC_BCN_LOST:
 476                 lbs_deb_cmd("EVENT: ADHOC beacon lost\n");
 477                 break;
 478         case MACREG_INT_CODE_RSSI_LOW:
 479                 lbs_pr_alert("EVENT: rssi low\n");
 480                 break;
 481         case MACREG_INT_CODE_SNR_LOW:
 482                 lbs_pr_alert("EVENT: snr low\n");
 483                 break;
 484         case MACREG_INT_CODE_MAX_FAIL:
 485                 lbs_pr_alert("EVENT: max fail\n");
 486                 break;
 487         case MACREG_INT_CODE_RSSI_HIGH:
 488                 lbs_pr_alert("EVENT: rssi high\n");
 489                 break;
 490         case MACREG_INT_CODE_SNR_HIGH:
 491                 lbs_pr_alert("EVENT: snr high\n");
 492                 break;
 493
 494         case MACREG_INT_CODE_MESH_AUTO_STARTED:
 495                 /* Ignore spurious autostart events */
 496                 lbs_pr_info("EVENT: MESH_AUTO_STARTED (ignoring)\n");
 497                 break;
 498
 499         default:
 500                 lbs_pr_alert("EVENT: unknown event id %d\n", event);
 501                 break;
 502         }
 503
 504         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 505         return ret;
 506 }