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 static inline int handle_cmd_response(struct lbs_private *priv,
 101                                       struct cmd_header *cmd_response)
 102 {
 103         struct cmd_ds_command *resp = (struct cmd_ds_command *) cmd_response;
 104         int ret = 0;
 105         unsigned long flags;
 106         uint16_t respcmd = le16_to_cpu(resp->command);
 107
 108         lbs_deb_enter(LBS_DEB_HOST);
 109
 110         switch (respcmd) {
 111         case CMD_RET(CMD_MAC_REG_ACCESS):
 112         case CMD_RET(CMD_BBP_REG_ACCESS):
 113         case CMD_RET(CMD_RF_REG_ACCESS):
 114                 ret = lbs_ret_reg_access(priv, respcmd, resp);
 115                 break;
 116
 117         case CMD_RET(CMD_802_11_SET_AFC):
 118         case CMD_RET(CMD_802_11_GET_AFC):
 119                 spin_lock_irqsave(&priv->driver_lock, flags);
 120                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.afc,
 121                         sizeof(struct cmd_ds_802_11_afc));
 122                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 123
 124                 break;
 125
 126         case CMD_RET(CMD_802_11_BEACON_STOP):
 127                 break;
 128
 129         case CMD_RET(CMD_802_11_RSSI):
 130                 ret = lbs_ret_802_11_rssi(priv, resp);
 131                 break;
 132
 133         case CMD_RET(CMD_802_11_TPC_CFG):
 134                 spin_lock_irqsave(&priv->driver_lock, flags);
 135                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.tpccfg,
 136                         sizeof(struct cmd_ds_802_11_tpc_cfg));
 137                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 138                 break;
 139
 140         case CMD_RET(CMD_BT_ACCESS):
 141                 spin_lock_irqsave(&priv->driver_lock, flags);
 142                 if (priv->cur_cmd->callback_arg)
 143                         memcpy((void *)priv->cur_cmd->callback_arg,
 144                                &resp->params.bt.addr1, 2 * ETH_ALEN);
 145                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 146                 break;
 147         case CMD_RET(CMD_FWT_ACCESS):
 148                 spin_lock_irqsave(&priv->driver_lock, flags);
 149                 if (priv->cur_cmd->callback_arg)
 150                         memcpy((void *)priv->cur_cmd->callback_arg, &resp->params.fwt,
 151                                sizeof(resp->params.fwt));
 152                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 153                 break;
 154         case CMD_RET(CMD_802_11_BEACON_CTRL):
 155                 ret = lbs_ret_802_11_bcn_ctrl(priv, resp);
 156                 break;
 157
 158         default:
 159                 lbs_pr_err("CMD_RESP: unknown cmd response 0x%04x\n",
 160                            le16_to_cpu(resp->command));
 161                 break;
 162         }
 163         lbs_deb_leave(LBS_DEB_HOST);
 164         return ret;
 165 }
 166
 167 int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
 168 {
 169         uint16_t respcmd, curcmd;
 170         struct cmd_header *resp;
 171         int ret = 0;
 172         unsigned long flags;
 173         uint16_t result;
 174
 175         lbs_deb_enter(LBS_DEB_HOST);
 176
 177         mutex_lock(&priv->lock);
 178         spin_lock_irqsave(&priv->driver_lock, flags);
 179
 180         if (!priv->cur_cmd) {
 181                 lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");
 182                 ret = -1;
 183                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 184                 goto done;
 185         }
 186
 187         resp = (void *)data;
 188         curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
 189         respcmd = le16_to_cpu(resp->command);
 190         result = le16_to_cpu(resp->result);
 191
 192         lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n",
 193                      respcmd, le16_to_cpu(resp->seqnum), len);
 194         lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len);
 195
 196         if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
 197                 lbs_pr_info("Received CMD_RESP with invalid sequence %d (expected %d)\n",
 198                             le16_to_cpu(resp->seqnum), le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum));
 199                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 200                 ret = -1;
 201                 goto done;
 202         }
 203         if (respcmd != CMD_RET(curcmd) &&
 204             respcmd != CMD_RET_802_11_ASSOCIATE && curcmd != CMD_802_11_ASSOCIATE) {
 205                 lbs_pr_info("Invalid CMD_RESP %x to command %x!\n", respcmd, curcmd);
 206                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 207                 ret = -1;
 208                 goto done;
 209         }
 210
 211         if (resp->result == cpu_to_le16(0x0004)) {
 212                 /* 0x0004 means -EAGAIN. Drop the response, let it time out
 213                    and be resubmitted */
 214                 lbs_pr_info("Firmware returns DEFER to command %x. Will let it time out...\n",
 215                             le16_to_cpu(resp->command));
 216                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 217                 ret = -1;
 218                 goto done;
 219         }
 220
 221         /* Now we got response from FW, cancel the command timer */
 222         del_timer(&priv->command_timer);
 223         priv->cmd_timed_out = 0;
 224
 225         /* Store the response code to cur_cmd_retcode. */
 226         priv->cur_cmd_retcode = result;
 227
 228         if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {
 229                 struct cmd_ds_802_11_ps_mode *psmode = (void *) &resp[1];
 230                 u16 action = le16_to_cpu(psmode->action);
 231
 232                 lbs_deb_host(
 233                        "CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",
 234                        result, action);
 235
 236                 if (result) {
 237                         lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",
 238                                     result);
 239                         /*
 240                          * We should not re-try enter-ps command in
 241                          * ad-hoc mode. It takes place in
 242                          * lbs_execute_next_command().
 243                          */
 244                         if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR &&
 245                             action == CMD_SUBCMD_ENTER_PS)
 246                                 priv->psmode = LBS802_11POWERMODECAM;
 247                 } else if (action == CMD_SUBCMD_ENTER_PS) {
 248                         priv->needtowakeup = 0;
 249                         priv->psstate = PS_STATE_AWAKE;
 250
 251                         lbs_deb_host("CMD_RESP: ENTER_PS command response\n");
 252                         if (priv->connect_status != LBS_CONNECTED) {
 253                                 /*
 254                                  * When Deauth Event received before Enter_PS command
 255                                  * response, We need to wake up the firmware.
 256                                  */
 257                                 lbs_deb_host(
 258                                        "disconnected, invoking lbs_ps_wakeup\n");
 259
 260                                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 261                                 mutex_unlock(&priv->lock);
 262                                 lbs_ps_wakeup(priv, 0);
 263                                 mutex_lock(&priv->lock);
 264                                 spin_lock_irqsave(&priv->driver_lock, flags);
 265                         }
 266                 } else if (action == CMD_SUBCMD_EXIT_PS) {
 267                         priv->needtowakeup = 0;
 268                         priv->psstate = PS_STATE_FULL_POWER;
 269                         lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
 270                 } else {
 271                         lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);
 272                 }
 273
 274                 lbs_complete_command(priv, priv->cur_cmd, result);
 275                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 276
 277                 ret = 0;
 278                 goto done;
 279         }
 280
 281         /* If the command is not successful, cleanup and return failure */
 282         if ((result != 0 || !(respcmd & 0x8000))) {
 283                 lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",
 284                        result, respcmd);
 285                 /*
 286                  * Handling errors here
 287                  */
 288                 switch (respcmd) {
 289                 case CMD_RET(CMD_GET_HW_SPEC):
 290                 case CMD_RET(CMD_802_11_RESET):
 291                         lbs_deb_host("CMD_RESP: reset failed\n");
 292                         break;
 293
 294                 }
 295                 lbs_complete_command(priv, priv->cur_cmd, result);
 296                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 297
 298                 ret = -1;
 299                 goto done;
 300         }
 301
 302         spin_unlock_irqrestore(&priv->driver_lock, flags);
 303
 304         if (priv->cur_cmd && priv->cur_cmd->callback) {
 305                 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
 306                                 resp);
 307         } else
 308                 ret = handle_cmd_response(priv, resp);
 309
 310         spin_lock_irqsave(&priv->driver_lock, flags);
 311
 312         if (priv->cur_cmd) {
 313                 /* Clean up and Put current command back to cmdfreeq */
 314                 lbs_complete_command(priv, priv->cur_cmd, result);
 315         }
 316         spin_unlock_irqrestore(&priv->driver_lock, flags);
 317
 318 done:
 319         mutex_unlock(&priv->lock);
 320         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
 321         return ret;
 322 }
 323
 324 int lbs_process_event(struct lbs_private *priv, u32 event)
 325 {
 326         int ret = 0;
 327         struct cmd_header cmd;
 328
 329         lbs_deb_enter(LBS_DEB_CMD);
 330
 331         switch (event) {
 332         case MACREG_INT_CODE_LINK_SENSED:
 333                 lbs_deb_cmd("EVENT: link sensed\n");
 334                 break;
 335
 336         case MACREG_INT_CODE_DEAUTHENTICATED:
 337                 lbs_deb_cmd("EVENT: deauthenticated\n");
 338                 lbs_mac_event_disconnected(priv);
 339                 break;
 340
 341         case MACREG_INT_CODE_DISASSOCIATED:
 342                 lbs_deb_cmd("EVENT: disassociated\n");
 343                 lbs_mac_event_disconnected(priv);
 344                 break;
 345
 346         case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
 347                 lbs_deb_cmd("EVENT: link lost\n");
 348                 lbs_mac_event_disconnected(priv);
 349                 break;
 350
 351         case MACREG_INT_CODE_PS_SLEEP:
 352                 lbs_deb_cmd("EVENT: ps sleep\n");
 353
 354                 /* handle unexpected PS SLEEP event */
 355                 if (priv->psstate == PS_STATE_FULL_POWER) {
 356                         lbs_deb_cmd(
 357                                "EVENT: in FULL POWER mode, ignoreing PS_SLEEP\n");
 358                         break;
 359                 }
 360                 priv->psstate = PS_STATE_PRE_SLEEP;
 361
 362                 lbs_ps_confirm_sleep(priv);
 363
 364                 break;
 365
 366         case MACREG_INT_CODE_HOST_AWAKE:
 367                 lbs_deb_cmd("EVENT: host awake\n");
 368                 if (priv->reset_deep_sleep_wakeup)
 369                         priv->reset_deep_sleep_wakeup(priv);
 370                 priv->is_deep_sleep = 0;
 371                 lbs_cmd_async(priv, CMD_802_11_WAKEUP_CONFIRM, &cmd,
 372                                 sizeof(cmd));
 373                 priv->is_host_sleep_activated = 0;
 374                 wake_up_interruptible(&priv->host_sleep_q);
 375                 break;
 376
 377         case MACREG_INT_CODE_DEEP_SLEEP_AWAKE:
 378                 if (priv->reset_deep_sleep_wakeup)
 379                         priv->reset_deep_sleep_wakeup(priv);
 380                 lbs_deb_cmd("EVENT: ds awake\n");
 381                 priv->is_deep_sleep = 0;
 382                 priv->wakeup_dev_required = 0;
 383                 wake_up_interruptible(&priv->ds_awake_q);
 384                 break;
 385
 386         case MACREG_INT_CODE_PS_AWAKE:
 387                 lbs_deb_cmd("EVENT: ps awake\n");
 388                 /* handle unexpected PS AWAKE event */
 389                 if (priv->psstate == PS_STATE_FULL_POWER) {
 390                         lbs_deb_cmd(
 391                                "EVENT: In FULL POWER mode - ignore PS AWAKE\n");
 392                         break;
 393                 }
 394
 395                 priv->psstate = PS_STATE_AWAKE;
 396
 397                 if (priv->needtowakeup) {
 398                         /*
 399                          * wait for the command processing to finish
 400                          * before resuming sending
 401                          * priv->needtowakeup will be set to FALSE
 402                          * in lbs_ps_wakeup()
 403                          */
 404                         lbs_deb_cmd("waking up ...\n");
 405                         lbs_ps_wakeup(priv, 0);
 406                 }
 407                 break;
 408
 409         case MACREG_INT_CODE_MIC_ERR_UNICAST:
 410                 lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");
 411                 lbs_send_mic_failureevent(priv, event);
 412                 break;
 413
 414         case MACREG_INT_CODE_MIC_ERR_MULTICAST:
 415                 lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");
 416                 lbs_send_mic_failureevent(priv, event);
 417                 break;
 418
 419         case MACREG_INT_CODE_MIB_CHANGED:
 420                 lbs_deb_cmd("EVENT: MIB CHANGED\n");
 421                 break;
 422         case MACREG_INT_CODE_INIT_DONE:
 423                 lbs_deb_cmd("EVENT: INIT DONE\n");
 424                 break;
 425         case MACREG_INT_CODE_ADHOC_BCN_LOST:
 426                 lbs_deb_cmd("EVENT: ADHOC beacon lost\n");
 427                 break;
 428         case MACREG_INT_CODE_RSSI_LOW:
 429                 lbs_pr_alert("EVENT: rssi low\n");
 430                 break;
 431         case MACREG_INT_CODE_SNR_LOW:
 432                 lbs_pr_alert("EVENT: snr low\n");
 433                 break;
 434         case MACREG_INT_CODE_MAX_FAIL:
 435                 lbs_pr_alert("EVENT: max fail\n");
 436                 break;
 437         case MACREG_INT_CODE_RSSI_HIGH:
 438                 lbs_pr_alert("EVENT: rssi high\n");
 439                 break;
 440         case MACREG_INT_CODE_SNR_HIGH:
 441                 lbs_pr_alert("EVENT: snr high\n");
 442                 break;
 443
 444         case MACREG_INT_CODE_MESH_AUTO_STARTED:
 445                 /* Ignore spurious autostart events */
 446                 lbs_pr_info("EVENT: MESH_AUTO_STARTED (ignoring)\n");
 447                 break;
 448
 449         default:
 450                 lbs_pr_alert("EVENT: unknown event id %d\n", event);
 451                 break;
 452         }
 453
 454         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 455         return ret;
 456 }