SAFE public projects git trees. - safe/jmp/linux-2.6/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/delay.h>
   6 #include <linux/sched.h>
   7 #include <linux/if_arp.h>
   8 #include <linux/netdevice.h>
   9 #include <asm/unaligned.h>
  10 #include <net/iw_handler.h>
  11
  12 #include "host.h"
  13 #include "decl.h"
  14 #include "cmd.h"
  15 #include "defs.h"
  16 #include "dev.h"
  17 #include "assoc.h"
  18 #include "wext.h"
  19
  20 /**
  21  *  @brief This function handles disconnect event. it
  22  *  reports disconnect to upper layer, clean tx/rx packets,
  23  *  reset link state etc.
  24  *
  25  *  @param priv    A pointer to struct lbs_private structure
  26  *  @return        n/a
  27  */
  28 void lbs_mac_event_disconnected(struct lbs_private *priv)
  29 {
  30         if (priv->connect_status != LBS_CONNECTED)
  31                 return;
  32
  33         lbs_deb_enter(LBS_DEB_ASSOC);
  34
  35         /*
  36          * Cisco AP sends EAP failure and de-auth in less than 0.5 ms.
  37          * It causes problem in the Supplicant
  38          */
  39         msleep_interruptible(1000);
  40         lbs_send_disconnect_notification(priv);
  41
  42         /* report disconnect to upper layer */
  43         netif_stop_queue(priv->dev);
  44         netif_carrier_off(priv->dev);
  45
  46         /* Free Tx and Rx packets */
  47         kfree_skb(priv->currenttxskb);
  48         priv->currenttxskb = NULL;
  49         priv->tx_pending_len = 0;
  50
  51         /* reset SNR/NF/RSSI values */
  52         memset(priv->SNR, 0x00, sizeof(priv->SNR));
  53         memset(priv->NF, 0x00, sizeof(priv->NF));
  54         memset(priv->RSSI, 0x00, sizeof(priv->RSSI));
  55         memset(priv->rawSNR, 0x00, sizeof(priv->rawSNR));
  56         memset(priv->rawNF, 0x00, sizeof(priv->rawNF));
  57         priv->nextSNRNF = 0;
  58         priv->numSNRNF = 0;
  59         priv->connect_status = LBS_DISCONNECTED;
  60
  61         /* Clear out associated SSID and BSSID since connection is
  62          * no longer valid.
  63          */
  64         memset(&priv->curbssparams.bssid, 0, ETH_ALEN);
  65         memset(&priv->curbssparams.ssid, 0, IEEE80211_MAX_SSID_LEN);
  66         priv->curbssparams.ssid_len = 0;
  67
  68         if (priv->psstate != PS_STATE_FULL_POWER) {
  69                 /* make firmware to exit PS mode */
  70                 lbs_deb_cmd("disconnected, so exit PS mode\n");
  71                 lbs_ps_wakeup(priv, 0);
  72         }
  73         lbs_deb_leave(LBS_DEB_ASSOC);
  74 }
  75
  76 static int lbs_ret_reg_access(struct lbs_private *priv,
  77                                u16 type, struct cmd_ds_command *resp)
  78 {
  79         int ret = 0;
  80
  81         lbs_deb_enter(LBS_DEB_CMD);
  82
  83         switch (type) {
  84         case CMD_RET(CMD_MAC_REG_ACCESS):
  85                 {
  86                         struct cmd_ds_mac_reg_access *reg = &resp->params.macreg;
  87
  88                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
  89                         priv->offsetvalue.value = le32_to_cpu(reg->value);
  90                         break;
  91                 }
  92
  93         case CMD_RET(CMD_BBP_REG_ACCESS):
  94                 {
  95                         struct cmd_ds_bbp_reg_access *reg = &resp->params.bbpreg;
  96
  97                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
  98                         priv->offsetvalue.value = reg->value;
  99                         break;
 100                 }
 101
 102         case CMD_RET(CMD_RF_REG_ACCESS):
 103                 {
 104                         struct cmd_ds_rf_reg_access *reg = &resp->params.rfreg;
 105
 106                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
 107                         priv->offsetvalue.value = reg->value;
 108                         break;
 109                 }
 110
 111         default:
 112                 ret = -1;
 113         }
 114
 115         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 116         return ret;
 117 }
 118
 119 static inline int handle_cmd_response(struct lbs_private *priv,
 120                                       struct cmd_header *cmd_response)
 121 {
 122         struct cmd_ds_command *resp = (struct cmd_ds_command *) cmd_response;
 123         int ret = 0;
 124         unsigned long flags;
 125         uint16_t respcmd = le16_to_cpu(resp->command);
 126
 127         lbs_deb_enter(LBS_DEB_HOST);
 128
 129         switch (respcmd) {
 130         case CMD_RET(CMD_MAC_REG_ACCESS):
 131         case CMD_RET(CMD_BBP_REG_ACCESS):
 132         case CMD_RET(CMD_RF_REG_ACCESS):
 133                 ret = lbs_ret_reg_access(priv, respcmd, resp);
 134                 break;
 135
 136         case CMD_RET(CMD_802_11_SET_AFC):
 137         case CMD_RET(CMD_802_11_GET_AFC):
 138                 spin_lock_irqsave(&priv->driver_lock, flags);
 139                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.afc,
 140                         sizeof(struct cmd_ds_802_11_afc));
 141                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 142
 143                 break;
 144
 145         case CMD_RET(CMD_802_11_BEACON_STOP):
 146                 break;
 147
 148         case CMD_RET(CMD_802_11_RSSI):
 149                 ret = lbs_ret_802_11_rssi(priv, resp);
 150                 break;
 151
 152         case CMD_RET(CMD_802_11_TPC_CFG):
 153                 spin_lock_irqsave(&priv->driver_lock, flags);
 154                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.tpccfg,
 155                         sizeof(struct cmd_ds_802_11_tpc_cfg));
 156                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 157                 break;
 158
 159         case CMD_RET(CMD_BT_ACCESS):
 160                 spin_lock_irqsave(&priv->driver_lock, flags);
 161                 if (priv->cur_cmd->callback_arg)
 162                         memcpy((void *)priv->cur_cmd->callback_arg,
 163                                &resp->params.bt.addr1, 2 * ETH_ALEN);
 164                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 165                 break;
 166         case CMD_RET(CMD_FWT_ACCESS):
 167                 spin_lock_irqsave(&priv->driver_lock, flags);
 168                 if (priv->cur_cmd->callback_arg)
 169                         memcpy((void *)priv->cur_cmd->callback_arg, &resp->params.fwt,
 170                                sizeof(resp->params.fwt));
 171                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 172                 break;
 173         case CMD_RET(CMD_802_11_BEACON_CTRL):
 174                 ret = lbs_ret_802_11_bcn_ctrl(priv, resp);
 175                 break;
 176
 177         default:
 178                 lbs_pr_err("CMD_RESP: unknown cmd response 0x%04x\n",
 179                            le16_to_cpu(resp->command));
 180                 break;
 181         }
 182         lbs_deb_leave(LBS_DEB_HOST);
 183         return ret;
 184 }
 185
 186 int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
 187 {
 188         uint16_t respcmd, curcmd;
 189         struct cmd_header *resp;
 190         int ret = 0;
 191         unsigned long flags;
 192         uint16_t result;
 193
 194         lbs_deb_enter(LBS_DEB_HOST);
 195
 196         mutex_lock(&priv->lock);
 197         spin_lock_irqsave(&priv->driver_lock, flags);
 198
 199         if (!priv->cur_cmd) {
 200                 lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");
 201                 ret = -1;
 202                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 203                 goto done;
 204         }
 205
 206         resp = (void *)data;
 207         curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
 208         respcmd = le16_to_cpu(resp->command);
 209         result = le16_to_cpu(resp->result);
 210
 211         lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n",
 212                      respcmd, le16_to_cpu(resp->seqnum), len);
 213         lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len);
 214
 215         if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
 216                 lbs_pr_info("Received CMD_RESP with invalid sequence %d (expected %d)\n",
 217                             le16_to_cpu(resp->seqnum), le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum));
 218                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 219                 ret = -1;
 220                 goto done;
 221         }
 222         if (respcmd != CMD_RET(curcmd) &&
 223             respcmd != CMD_RET_802_11_ASSOCIATE && curcmd != CMD_802_11_ASSOCIATE) {
 224                 lbs_pr_info("Invalid CMD_RESP %x to command %x!\n", respcmd, curcmd);
 225                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 226                 ret = -1;
 227                 goto done;
 228         }
 229
 230         if (resp->result == cpu_to_le16(0x0004)) {
 231                 /* 0x0004 means -EAGAIN. Drop the response, let it time out
 232                    and be resubmitted */
 233                 lbs_pr_info("Firmware returns DEFER to command %x. Will let it time out...\n",
 234                             le16_to_cpu(resp->command));
 235                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 236                 ret = -1;
 237                 goto done;
 238         }
 239
 240         /* Now we got response from FW, cancel the command timer */
 241         del_timer(&priv->command_timer);
 242         priv->cmd_timed_out = 0;
 243         if (priv->nr_retries) {
 244                 lbs_pr_info("Received result %x to command %x after %d retries\n",
 245                             result, curcmd, priv->nr_retries);
 246                 priv->nr_retries = 0;
 247         }
 248
 249         /* Store the response code to cur_cmd_retcode. */
 250         priv->cur_cmd_retcode = result;
 251
 252         if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {
 253                 struct cmd_ds_802_11_ps_mode *psmode = (void *) &resp[1];
 254                 u16 action = le16_to_cpu(psmode->action);
 255
 256                 lbs_deb_host(
 257                        "CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",
 258                        result, action);
 259
 260                 if (result) {
 261                         lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",
 262                                     result);
 263                         /*
 264                          * We should not re-try enter-ps command in
 265                          * ad-hoc mode. It takes place in
 266                          * lbs_execute_next_command().
 267                          */
 268                         if (priv->mode == IW_MODE_ADHOC &&
 269                             action == CMD_SUBCMD_ENTER_PS)
 270                                 priv->psmode = LBS802_11POWERMODECAM;
 271                 } else if (action == CMD_SUBCMD_ENTER_PS) {
 272                         priv->needtowakeup = 0;
 273                         priv->psstate = PS_STATE_AWAKE;
 274
 275                         lbs_deb_host("CMD_RESP: ENTER_PS command response\n");
 276                         if (priv->connect_status != LBS_CONNECTED) {
 277                                 /*
 278                                  * When Deauth Event received before Enter_PS command
 279                                  * response, We need to wake up the firmware.
 280                                  */
 281                                 lbs_deb_host(
 282                                        "disconnected, invoking lbs_ps_wakeup\n");
 283
 284                                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 285                                 mutex_unlock(&priv->lock);
 286                                 lbs_ps_wakeup(priv, 0);
 287                                 mutex_lock(&priv->lock);
 288                                 spin_lock_irqsave(&priv->driver_lock, flags);
 289                         }
 290                 } else if (action == CMD_SUBCMD_EXIT_PS) {
 291                         priv->needtowakeup = 0;
 292                         priv->psstate = PS_STATE_FULL_POWER;
 293                         lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
 294                 } else {
 295                         lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);
 296                 }
 297
 298                 lbs_complete_command(priv, priv->cur_cmd, result);
 299                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 300
 301                 ret = 0;
 302                 goto done;
 303         }
 304
 305         /* If the command is not successful, cleanup and return failure */
 306         if ((result != 0 || !(respcmd & 0x8000))) {
 307                 lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",
 308                        result, respcmd);
 309                 /*
 310                  * Handling errors here
 311                  */
 312                 switch (respcmd) {
 313                 case CMD_RET(CMD_GET_HW_SPEC):
 314                 case CMD_RET(CMD_802_11_RESET):
 315                         lbs_deb_host("CMD_RESP: reset failed\n");
 316                         break;
 317
 318                 }
 319                 lbs_complete_command(priv, priv->cur_cmd, result);
 320                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 321
 322                 ret = -1;
 323                 goto done;
 324         }
 325
 326         spin_unlock_irqrestore(&priv->driver_lock, flags);
 327
 328         if (priv->cur_cmd && priv->cur_cmd->callback) {
 329                 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
 330                                 resp);
 331         } else
 332                 ret = handle_cmd_response(priv, resp);
 333
 334         spin_lock_irqsave(&priv->driver_lock, flags);
 335
 336         if (priv->cur_cmd) {
 337                 /* Clean up and Put current command back to cmdfreeq */
 338                 lbs_complete_command(priv, priv->cur_cmd, result);
 339         }
 340         spin_unlock_irqrestore(&priv->driver_lock, flags);
 341
 342 done:
 343         mutex_unlock(&priv->lock);
 344         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
 345         return ret;
 346 }
 347
 348 static int lbs_send_confirmwake(struct lbs_private *priv)
 349 {
 350         struct cmd_header cmd;
 351         int ret = 0;
 352
 353         lbs_deb_enter(LBS_DEB_HOST);
 354
 355         cmd.command = cpu_to_le16(CMD_802_11_WAKEUP_CONFIRM);
 356         cmd.size = cpu_to_le16(sizeof(cmd));
 357         cmd.seqnum = cpu_to_le16(++priv->seqnum);
 358         cmd.result = 0;
 359
 360         lbs_deb_hex(LBS_DEB_HOST, "wake confirm", (u8 *) &cmd,
 361                 sizeof(cmd));
 362
 363         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &cmd, sizeof(cmd));
 364         if (ret)
 365                 lbs_pr_alert("SEND_WAKEC_CMD: Host to Card failed for Confirm Wake\n");
 366
 367         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
 368         return ret;
 369 }
 370
 371 int lbs_process_event(struct lbs_private *priv, u32 event)
 372 {
 373         int ret = 0;
 374
 375         lbs_deb_enter(LBS_DEB_CMD);
 376
 377         switch (event) {
 378         case MACREG_INT_CODE_LINK_SENSED:
 379                 lbs_deb_cmd("EVENT: link sensed\n");
 380                 break;
 381
 382         case MACREG_INT_CODE_DEAUTHENTICATED:
 383                 lbs_deb_cmd("EVENT: deauthenticated\n");
 384                 lbs_mac_event_disconnected(priv);
 385                 break;
 386
 387         case MACREG_INT_CODE_DISASSOCIATED:
 388                 lbs_deb_cmd("EVENT: disassociated\n");
 389                 lbs_mac_event_disconnected(priv);
 390                 break;
 391
 392         case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
 393                 lbs_deb_cmd("EVENT: link lost\n");
 394                 lbs_mac_event_disconnected(priv);
 395                 break;
 396
 397         case MACREG_INT_CODE_PS_SLEEP:
 398                 lbs_deb_cmd("EVENT: ps sleep\n");
 399
 400                 /* handle unexpected PS SLEEP event */
 401                 if (priv->psstate == PS_STATE_FULL_POWER) {
 402                         lbs_deb_cmd(
 403                                "EVENT: in FULL POWER mode, ignoreing PS_SLEEP\n");
 404                         break;
 405                 }
 406                 priv->psstate = PS_STATE_PRE_SLEEP;
 407
 408                 lbs_ps_confirm_sleep(priv);
 409
 410                 break;
 411
 412         case MACREG_INT_CODE_HOST_AWAKE:
 413                 lbs_deb_cmd("EVENT: host awake\n");
 414                 if (priv->reset_deep_sleep_wakeup)
 415                         priv->reset_deep_sleep_wakeup(priv);
 416                 priv->is_deep_sleep = 0;
 417                 lbs_send_confirmwake(priv);
 418                 break;
 419
 420         case MACREG_INT_CODE_DEEP_SLEEP_AWAKE:
 421                 if (priv->reset_deep_sleep_wakeup)
 422                         priv->reset_deep_sleep_wakeup(priv);
 423                 lbs_deb_cmd("EVENT: ds awake\n");
 424                 priv->is_deep_sleep = 0;
 425                 priv->wakeup_dev_required = 0;
 426                 wake_up_interruptible(&priv->ds_awake_q);
 427                 break;
 428
 429         case MACREG_INT_CODE_PS_AWAKE:
 430                 lbs_deb_cmd("EVENT: ps awake\n");
 431                 /* handle unexpected PS AWAKE event */
 432                 if (priv->psstate == PS_STATE_FULL_POWER) {
 433                         lbs_deb_cmd(
 434                                "EVENT: In FULL POWER mode - ignore PS AWAKE\n");
 435                         break;
 436                 }
 437
 438                 priv->psstate = PS_STATE_AWAKE;
 439
 440                 if (priv->needtowakeup) {
 441                         /*
 442                          * wait for the command processing to finish
 443                          * before resuming sending
 444                          * priv->needtowakeup will be set to FALSE
 445                          * in lbs_ps_wakeup()
 446                          */
 447                         lbs_deb_cmd("waking up ...\n");
 448                         lbs_ps_wakeup(priv, 0);
 449                 }
 450                 break;
 451
 452         case MACREG_INT_CODE_MIC_ERR_UNICAST:
 453                 lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");
 454                 lbs_send_mic_failureevent(priv, event);
 455                 break;
 456
 457         case MACREG_INT_CODE_MIC_ERR_MULTICAST:
 458                 lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");
 459                 lbs_send_mic_failureevent(priv, event);
 460                 break;
 461
 462         case MACREG_INT_CODE_MIB_CHANGED:
 463                 lbs_deb_cmd("EVENT: MIB CHANGED\n");
 464                 break;
 465         case MACREG_INT_CODE_INIT_DONE:
 466                 lbs_deb_cmd("EVENT: INIT DONE\n");
 467                 break;
 468         case MACREG_INT_CODE_ADHOC_BCN_LOST:
 469                 lbs_deb_cmd("EVENT: ADHOC beacon lost\n");
 470                 break;
 471         case MACREG_INT_CODE_RSSI_LOW:
 472                 lbs_pr_alert("EVENT: rssi low\n");
 473                 break;
 474         case MACREG_INT_CODE_SNR_LOW:
 475                 lbs_pr_alert("EVENT: snr low\n");
 476                 break;
 477         case MACREG_INT_CODE_MAX_FAIL:
 478                 lbs_pr_alert("EVENT: max fail\n");
 479                 break;
 480         case MACREG_INT_CODE_RSSI_HIGH:
 481                 lbs_pr_alert("EVENT: rssi high\n");
 482                 break;
 483         case MACREG_INT_CODE_SNR_HIGH:
 484                 lbs_pr_alert("EVENT: snr high\n");
 485                 break;
 486
 487         case MACREG_INT_CODE_MESH_AUTO_STARTED:
 488                 /* Ignore spurious autostart events */
 489                 lbs_pr_info("EVENT: MESH_AUTO_STARTED (ignoring)\n");
 490                 break;
 491
 492         default:
 493                 lbs_pr_alert("EVENT: unknown event id %d\n", event);
 494                 break;
 495         }
 496
 497         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 498         return ret;
 499 }