drivers/net/wireless/mwifiex/cmdevt.c

   1 /*
   2  * Marvell Wireless LAN device driver: commands and events
   3  *
   4  * Copyright (C) 2011-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27 #include "11ac.h"
  28
  29 /*
  30  * This function initializes a command node.
  31  *
  32  * The actual allocation of the node is not done by this function. It only
  33  * initiates a node by filling it with default parameters. Similarly,
  34  * allocation of the different buffers used (IOCTL buffer, data buffer) are
  35  * not done by this function either.
  36  */
  37 static void
  38 mwifiex_init_cmd_node(struct mwifiex_private *priv,
  39                       struct cmd_ctrl_node *cmd_node,
  40                       u32 cmd_oid, void *data_buf, bool sync)
  41 {
  42         cmd_node->priv = priv;
  43         cmd_node->cmd_oid = cmd_oid;
  44         if (sync) {
  45                 cmd_node->wait_q_enabled = true;
  46                 cmd_node->cmd_wait_q_woken = false;
  47                 cmd_node->condition = &cmd_node->cmd_wait_q_woken;
  48         }
  49         cmd_node->data_buf = data_buf;
  50         cmd_node->cmd_skb = cmd_node->skb;
  51 }
  52
  53 /*
  54  * This function returns a command node from the free queue depending upon
  55  * availability.
  56  */
  57 static struct cmd_ctrl_node *
  58 mwifiex_get_cmd_node(struct mwifiex_adapter *adapter)
  59 {
  60         struct cmd_ctrl_node *cmd_node;
  61         unsigned long flags;
  62
  63         spin_lock_irqsave(&adapter->cmd_free_q_lock, flags);
  64         if (list_empty(&adapter->cmd_free_q)) {
  65                 mwifiex_dbg(adapter, ERROR,
  66                             "GET_CMD_NODE: cmd node not available\n");
  67                 spin_unlock_irqrestore(&adapter->cmd_free_q_lock, flags);
  68                 return NULL;
  69         }
  70         cmd_node = list_first_entry(&adapter->cmd_free_q,
  71                                     struct cmd_ctrl_node, list);
  72         list_del(&cmd_node->list);
  73         spin_unlock_irqrestore(&adapter->cmd_free_q_lock, flags);
  74
  75         return cmd_node;
  76 }
  77
  78 /*
  79  * This function cleans up a command node.
  80  *
  81  * The function resets the fields including the buffer pointers.
  82  * This function does not try to free the buffers. They must be
  83  * freed before calling this function.
  84  *
  85  * This function will however call the receive completion callback
  86  * in case a response buffer is still available before resetting
  87  * the pointer.
  88  */
  89 static void
  90 mwifiex_clean_cmd_node(struct mwifiex_adapter *adapter,
  91                        struct cmd_ctrl_node *cmd_node)
  92 {
  93         cmd_node->cmd_oid = 0;
  94         cmd_node->cmd_flag = 0;
  95         cmd_node->data_buf = NULL;
  96         cmd_node->wait_q_enabled = false;
  97
  98         if (cmd_node->cmd_skb)
  99                 skb_trim(cmd_node->cmd_skb, 0);
 100
 101         if (cmd_node->resp_skb) {
 102                 adapter->if_ops.cmdrsp_complete(adapter, cmd_node->resp_skb);
 103                 cmd_node->resp_skb = NULL;
 104         }
 105 }
 106
 107 /*
 108  * This function sends a host command to the firmware.
 109  *
 110  * The function copies the host command into the driver command
 111  * buffer, which will be transferred to the firmware later by the
 112  * main thread.
 113  */
 114 static int mwifiex_cmd_host_cmd(struct mwifiex_private *priv,
 115                                 struct host_cmd_ds_command *cmd,
 116                                 struct mwifiex_ds_misc_cmd *pcmd_ptr)
 117 {
 118         /* Copy the HOST command to command buffer */
 119         memcpy(cmd, pcmd_ptr->cmd, pcmd_ptr->len);
 120         mwifiex_dbg(priv->adapter, CMD,
 121                     "cmd: host cmd size = %d\n", pcmd_ptr->len);
 122         return 0;
 123 }
 124
 125 /*
 126  * This function downloads a command to the firmware.
 127  *
 128  * The function performs sanity tests, sets the command sequence
 129  * number and size, converts the header fields to CPU format before
 130  * sending. Afterwards, it logs the command ID and action for debugging
 131  * and sets up the command timeout timer.
 132  */
 133 static int mwifiex_dnld_cmd_to_fw(struct mwifiex_private *priv,
 134                                   struct cmd_ctrl_node *cmd_node)
 135 {
 136
 137         struct mwifiex_adapter *adapter = priv->adapter;
 138         int ret;
 139         struct host_cmd_ds_command *host_cmd;
 140         uint16_t cmd_code;
 141         uint16_t cmd_size;
 142         unsigned long flags;
 143         __le32 tmp;
 144
 145         if (!adapter || !cmd_node)
 146                 return -1;
 147
 148         host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
 149
 150         /* Sanity test */
 151         if (host_cmd == NULL || host_cmd->size == 0) {
 152                 mwifiex_dbg(adapter, ERROR,
 153                             "DNLD_CMD: host_cmd is null\t"
 154                             "or cmd size is 0, not sending\n");
 155                 if (cmd_node->wait_q_enabled)
 156                         adapter->cmd_wait_q.status = -1;
 157                 mwifiex_recycle_cmd_node(adapter, cmd_node);
 158                 return -1;
 159         }
 160
 161         cmd_code = le16_to_cpu(host_cmd->command);
 162         cmd_size = le16_to_cpu(host_cmd->size);
 163
 164         if (adapter->hw_status == MWIFIEX_HW_STATUS_RESET &&
 165             cmd_code != HostCmd_CMD_FUNC_SHUTDOWN &&
 166             cmd_code != HostCmd_CMD_FUNC_INIT) {
 167                 mwifiex_dbg(adapter, ERROR,
 168                             "DNLD_CMD: FW in reset state, ignore cmd %#x\n",
 169                         cmd_code);
 170                 mwifiex_recycle_cmd_node(adapter, cmd_node);
 171                 queue_work(adapter->workqueue, &adapter->main_work);
 172                 return -1;
 173         }
 174
 175         /* Set command sequence number */
 176         adapter->seq_num++;
 177         host_cmd->seq_num = cpu_to_le16(HostCmd_SET_SEQ_NO_BSS_INFO
 178                                         (adapter->seq_num,
 179                                          cmd_node->priv->bss_num,
 180                                          cmd_node->priv->bss_type));
 181
 182         spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
 183         adapter->curr_cmd = cmd_node;
 184         spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
 185
 186         /* Adjust skb length */
 187         if (cmd_node->cmd_skb->len > cmd_size)
 188                 /*
 189                  * cmd_size is less than sizeof(struct host_cmd_ds_command).
 190                  * Trim off the unused portion.
 191                  */
 192                 skb_trim(cmd_node->cmd_skb, cmd_size);
 193         else if (cmd_node->cmd_skb->len < cmd_size)
 194                 /*
 195                  * cmd_size is larger than sizeof(struct host_cmd_ds_command)
 196                  * because we have appended custom IE TLV. Increase skb length
 197                  * accordingly.
 198                  */
 199                 skb_put(cmd_node->cmd_skb, cmd_size - cmd_node->cmd_skb->len);
 200
 201         mwifiex_dbg(adapter, CMD,
 202                     "cmd: DNLD_CMD: %#x, act %#x, len %d, seqno %#x\n",
 203                     cmd_code,
 204                     le16_to_cpu(*(__le16 *)((u8 *)host_cmd + S_DS_GEN)),
 205                     cmd_size, le16_to_cpu(host_cmd->seq_num));
 206         mwifiex_dbg_dump(adapter, CMD_D, "cmd buffer:", host_cmd, cmd_size);
 207
 208         if (adapter->iface_type == MWIFIEX_USB) {
 209                 tmp = cpu_to_le32(MWIFIEX_USB_TYPE_CMD);
 210                 skb_push(cmd_node->cmd_skb, MWIFIEX_TYPE_LEN);
 211                 memcpy(cmd_node->cmd_skb->data, &tmp, MWIFIEX_TYPE_LEN);
 212                 adapter->cmd_sent = true;
 213                 ret = adapter->if_ops.host_to_card(adapter,
 214                                                    MWIFIEX_USB_EP_CMD_EVENT,
 215                                                    cmd_node->cmd_skb, NULL);
 216                 skb_pull(cmd_node->cmd_skb, MWIFIEX_TYPE_LEN);
 217                 if (ret == -EBUSY)
 218                         cmd_node->cmd_skb = NULL;
 219         } else {
 220                 skb_push(cmd_node->cmd_skb, INTF_HEADER_LEN);
 221                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_CMD,
 222                                                    cmd_node->cmd_skb, NULL);
 223                 skb_pull(cmd_node->cmd_skb, INTF_HEADER_LEN);
 224         }
 225
 226         if (ret == -1) {
 227                 mwifiex_dbg(adapter, ERROR,
 228                             "DNLD_CMD: host to card failed\n");
 229                 if (adapter->iface_type == MWIFIEX_USB)
 230                         adapter->cmd_sent = false;
 231                 if (cmd_node->wait_q_enabled)
 232                         adapter->cmd_wait_q.status = -1;
 233                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 234
 235                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
 236                 adapter->curr_cmd = NULL;
 237                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
 238
 239                 adapter->dbg.num_cmd_host_to_card_failure++;
 240                 return -1;
 241         }
 242
 243         /* Save the last command id and action to debug log */
 244         adapter->dbg.last_cmd_index =
 245                         (adapter->dbg.last_cmd_index + 1) % DBG_CMD_NUM;
 246         adapter->dbg.last_cmd_id[adapter->dbg.last_cmd_index] = cmd_code;
 247         adapter->dbg.last_cmd_act[adapter->dbg.last_cmd_index] =
 248                         le16_to_cpu(*(__le16 *) ((u8 *) host_cmd + S_DS_GEN));
 249
 250         /* Clear BSS_NO_BITS from HostCmd */
 251         cmd_code &= HostCmd_CMD_ID_MASK;
 252
 253         /* Setup the timer after transmit command */
 254         mod_timer(&adapter->cmd_timer,
 255                   jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
 256
 257         return 0;
 258 }
 259
 260 /*
 261  * This function downloads a sleep confirm command to the firmware.
 262  *
 263  * The function performs sanity tests, sets the command sequence
 264  * number and size, converts the header fields to CPU format before
 265  * sending.
 266  *
 267  * No responses are needed for sleep confirm command.
 268  */
 269 static int mwifiex_dnld_sleep_confirm_cmd(struct mwifiex_adapter *adapter)
 270 {
 271         int ret;
 272         struct mwifiex_private *priv;
 273         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf =
 274                                 (struct mwifiex_opt_sleep_confirm *)
 275                                                 adapter->sleep_cfm->data;
 276         struct sk_buff *sleep_cfm_tmp;
 277         __le32 tmp;
 278
 279         priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 280
 281         adapter->seq_num++;
 282         sleep_cfm_buf->seq_num =
 283                 cpu_to_le16((HostCmd_SET_SEQ_NO_BSS_INFO
 284                                         (adapter->seq_num, priv->bss_num,
 285                                          priv->bss_type)));
 286
 287         mwifiex_dbg(adapter, CMD,
 288                     "cmd: DNLD_CMD: %#x, act %#x, len %d, seqno %#x\n",
 289                 le16_to_cpu(sleep_cfm_buf->command),
 290                 le16_to_cpu(sleep_cfm_buf->action),
 291                 le16_to_cpu(sleep_cfm_buf->size),
 292                 le16_to_cpu(sleep_cfm_buf->seq_num));
 293         mwifiex_dbg_dump(adapter, CMD_D, "SLEEP_CFM buffer: ", sleep_cfm_buf,
 294                          le16_to_cpu(sleep_cfm_buf->size));
 295
 296         if (adapter->iface_type == MWIFIEX_USB) {
 297                 sleep_cfm_tmp =
 298                         dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 299                                       + MWIFIEX_TYPE_LEN);
 300                 skb_put(sleep_cfm_tmp, sizeof(struct mwifiex_opt_sleep_confirm)
 301                         + MWIFIEX_TYPE_LEN);
 302                 tmp = cpu_to_le32(MWIFIEX_USB_TYPE_CMD);
 303                 memcpy(sleep_cfm_tmp->data, &tmp, MWIFIEX_TYPE_LEN);
 304                 memcpy(sleep_cfm_tmp->data + MWIFIEX_TYPE_LEN,
 305                        adapter->sleep_cfm->data,
 306                        sizeof(struct mwifiex_opt_sleep_confirm));
 307                 ret = adapter->if_ops.host_to_card(adapter,
 308                                                    MWIFIEX_USB_EP_CMD_EVENT,
 309                                                    sleep_cfm_tmp, NULL);
 310                 if (ret != -EBUSY)
 311                         dev_kfree_skb_any(sleep_cfm_tmp);
 312         } else {
 313                 skb_push(adapter->sleep_cfm, INTF_HEADER_LEN);
 314                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_CMD,
 315                                                    adapter->sleep_cfm, NULL);
 316                 skb_pull(adapter->sleep_cfm, INTF_HEADER_LEN);
 317         }
 318
 319         if (ret == -1) {
 320                 mwifiex_dbg(adapter, ERROR, "SLEEP_CFM: failed\n");
 321                 adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure++;
 322                 return -1;
 323         }
 324
 325         if (!le16_to_cpu(sleep_cfm_buf->resp_ctrl))
 326                 /* Response is not needed for sleep confirm command */
 327                 adapter->ps_state = PS_STATE_SLEEP;
 328         else
 329                 adapter->ps_state = PS_STATE_SLEEP_CFM;
 330
 331         if (!le16_to_cpu(sleep_cfm_buf->resp_ctrl) &&
 332             (adapter->is_hs_configured &&
 333              !adapter->sleep_period.period)) {
 334                 adapter->pm_wakeup_card_req = true;
 335                 mwifiex_hs_activated_event(mwifiex_get_priv
 336                                 (adapter, MWIFIEX_BSS_ROLE_ANY), true);
 337         }
 338
 339         return ret;
 340 }
 341
 342 /*
 343  * This function allocates the command buffers and links them to
 344  * the command free queue.
 345  *
 346  * The driver uses a pre allocated number of command buffers, which
 347  * are created at driver initializations and freed at driver cleanup.
 348  * Every command needs to obtain a command buffer from this pool before
 349  * it can be issued. The command free queue lists the command buffers
 350  * currently free to use, while the command pending queue lists the
 351  * command buffers already in use and awaiting handling. Command buffers
 352  * are returned to the free queue after use.
 353  */
 354 int mwifiex_alloc_cmd_buffer(struct mwifiex_adapter *adapter)
 355 {
 356         struct cmd_ctrl_node *cmd_array;
 357         u32 i;
 358
 359         /* Allocate and initialize struct cmd_ctrl_node */
 360         cmd_array = kcalloc(MWIFIEX_NUM_OF_CMD_BUFFER,
 361                             sizeof(struct cmd_ctrl_node), GFP_KERNEL);
 362         if (!cmd_array)
 363                 return -ENOMEM;
 364
 365         adapter->cmd_pool = cmd_array;
 366
 367         /* Allocate and initialize command buffers */
 368         for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++) {
 369                 cmd_array[i].skb = dev_alloc_skb(MWIFIEX_SIZE_OF_CMD_BUFFER);
 370                 if (!cmd_array[i].skb) {
 371                         mwifiex_dbg(adapter, ERROR,
 372                                     "unable to allocate command buffer\n");
 373                         return -ENOMEM;
 374                 }
 375         }
 376
 377         for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++)
 378                 mwifiex_insert_cmd_to_free_q(adapter, &cmd_array[i]);
 379
 380         return 0;
 381 }
 382
 383 /*
 384  * This function frees the command buffers.
 385  *
 386  * The function calls the completion callback for all the command
 387  * buffers that still have response buffers associated with them.
 388  */
 389 int mwifiex_free_cmd_buffer(struct mwifiex_adapter *adapter)
 390 {
 391         struct cmd_ctrl_node *cmd_array;
 392         u32 i;
 393
 394         /* Need to check if cmd pool is allocated or not */
 395         if (!adapter->cmd_pool) {
 396                 mwifiex_dbg(adapter, FATAL,
 397                             "info: FREE_CMD_BUF: cmd_pool is null\n");
 398                 return 0;
 399         }
 400
 401         cmd_array = adapter->cmd_pool;
 402
 403         /* Release shared memory buffers */
 404         for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++) {
 405                 if (cmd_array[i].skb) {
 406                         mwifiex_dbg(adapter, CMD,
 407                                     "cmd: free cmd buffer %d\n", i);
 408                         dev_kfree_skb_any(cmd_array[i].skb);
 409                 }
 410                 if (!cmd_array[i].resp_skb)
 411                         continue;
 412
 413                 if (adapter->iface_type == MWIFIEX_USB)
 414                         adapter->if_ops.cmdrsp_complete(adapter,
 415                                                         cmd_array[i].resp_skb);
 416                 else
 417                         dev_kfree_skb_any(cmd_array[i].resp_skb);
 418         }
 419         /* Release struct cmd_ctrl_node */
 420         if (adapter->cmd_pool) {
 421                 mwifiex_dbg(adapter, CMD,
 422                             "cmd: free cmd pool\n");
 423                 kfree(adapter->cmd_pool);
 424                 adapter->cmd_pool = NULL;
 425         }
 426
 427         return 0;
 428 }
 429
 430 /*
 431  * This function handles events generated by firmware.
 432  *
 433  * Event body of events received from firmware are not used (though they are
 434  * saved), only the event ID is used. Some events are re-invoked by
 435  * the driver, with a new event body.
 436  *
 437  * After processing, the function calls the completion callback
 438  * for cleanup.
 439  */
 440 int mwifiex_process_event(struct mwifiex_adapter *adapter)
 441 {
 442         int ret;
 443         struct mwifiex_private *priv =
 444                 mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 445         struct sk_buff *skb = adapter->event_skb;
 446         u32 eventcause = adapter->event_cause;
 447         struct mwifiex_rxinfo *rx_info;
 448
 449         /* Save the last event to debug log */
 450         adapter->dbg.last_event_index =
 451                         (adapter->dbg.last_event_index + 1) % DBG_CMD_NUM;
 452         adapter->dbg.last_event[adapter->dbg.last_event_index] =
 453                                                         (u16) eventcause;
 454
 455         /* Get BSS number and corresponding priv */
 456         priv = mwifiex_get_priv_by_id(adapter, EVENT_GET_BSS_NUM(eventcause),
 457                                       EVENT_GET_BSS_TYPE(eventcause));
 458         if (!priv)
 459                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 460
 461         /* Clear BSS_NO_BITS from event */
 462         eventcause &= EVENT_ID_MASK;
 463         adapter->event_cause = eventcause;
 464
 465         if (skb) {
 466                 rx_info = MWIFIEX_SKB_RXCB(skb);
 467                 memset(rx_info, 0, sizeof(*rx_info));
 468                 rx_info->bss_num = priv->bss_num;
 469                 rx_info->bss_type = priv->bss_type;
 470                 mwifiex_dbg_dump(adapter, EVT_D, "Event Buf:",
 471                                  skb->data, skb->len);
 472         }
 473
 474         mwifiex_dbg(adapter, EVENT, "EVENT: cause: %#x\n", eventcause);
 475
 476         if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
 477                 ret = mwifiex_process_uap_event(priv);
 478         else
 479                 ret = mwifiex_process_sta_event(priv);
 480
 481         adapter->event_cause = 0;
 482         adapter->event_skb = NULL;
 483         adapter->if_ops.event_complete(adapter, skb);
 484
 485         return ret;
 486 }
 487
 488 /*
 489  * This function prepares a command and send it to the firmware.
 490  *
 491  * Preparation includes -
 492  *      - Sanity tests to make sure the card is still present or the FW
 493  *        is not reset
 494  *      - Getting a new command node from the command free queue
 495  *      - Initializing the command node for default parameters
 496  *      - Fill up the non-default parameters and buffer pointers
 497  *      - Add the command to pending queue
 498  */
 499 int mwifiex_send_cmd(struct mwifiex_private *priv, u16 cmd_no,
 500                      u16 cmd_action, u32 cmd_oid, void *data_buf, bool sync)
 501 {
 502         int ret;
 503         struct mwifiex_adapter *adapter = priv->adapter;
 504         struct cmd_ctrl_node *cmd_node;
 505         struct host_cmd_ds_command *cmd_ptr;
 506
 507         if (!adapter) {
 508                 pr_err("PREP_CMD: adapter is NULL\n");
 509                 return -1;
 510         }
 511
 512         if (adapter->is_suspended) {
 513                 mwifiex_dbg(adapter, ERROR,
 514                             "PREP_CMD: device in suspended state\n");
 515                 return -1;
 516         }
 517
 518         if (adapter->hs_enabling && cmd_no != HostCmd_CMD_802_11_HS_CFG_ENH) {
 519                 mwifiex_dbg(adapter, ERROR,
 520                             "PREP_CMD: host entering sleep state\n");
 521                 return -1;
 522         }
 523
 524         if (adapter->surprise_removed) {
 525                 mwifiex_dbg(adapter, ERROR,
 526                             "PREP_CMD: card is removed\n");
 527                 return -1;
 528         }
 529
 530         if (adapter->is_cmd_timedout) {
 531                 mwifiex_dbg(adapter, ERROR,
 532                             "PREP_CMD: FW is in bad state\n");
 533                 return -1;
 534         }
 535
 536         if (adapter->hw_status == MWIFIEX_HW_STATUS_RESET) {
 537                 if (cmd_no != HostCmd_CMD_FUNC_INIT) {
 538                         mwifiex_dbg(adapter, ERROR,
 539                                     "PREP_CMD: FW in reset state\n");
 540                         return -1;
 541                 }
 542         }
 543
 544         /* Get a new command node */
 545         cmd_node = mwifiex_get_cmd_node(adapter);
 546
 547         if (!cmd_node) {
 548                 mwifiex_dbg(adapter, ERROR,
 549                             "PREP_CMD: no free cmd node\n");
 550                 return -1;
 551         }
 552
 553         /* Initialize the command node */
 554         mwifiex_init_cmd_node(priv, cmd_node, cmd_oid, data_buf, sync);
 555
 556         if (!cmd_node->cmd_skb) {
 557                 mwifiex_dbg(adapter, ERROR,
 558                             "PREP_CMD: no free cmd buf\n");
 559                 return -1;
 560         }
 561
 562         memset(skb_put(cmd_node->cmd_skb, sizeof(struct host_cmd_ds_command)),
 563                0, sizeof(struct host_cmd_ds_command));
 564
 565         cmd_ptr = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
 566         cmd_ptr->command = cpu_to_le16(cmd_no);
 567         cmd_ptr->result = 0;
 568
 569         /* Prepare command */
 570         if (cmd_no) {
 571                 switch (cmd_no) {
 572                 case HostCmd_CMD_UAP_SYS_CONFIG:
 573                 case HostCmd_CMD_UAP_BSS_START:
 574                 case HostCmd_CMD_UAP_BSS_STOP:
 575                 case HostCmd_CMD_UAP_STA_DEAUTH:
 576                 case HOST_CMD_APCMD_SYS_RESET:
 577                 case HOST_CMD_APCMD_STA_LIST:
 578                         ret = mwifiex_uap_prepare_cmd(priv, cmd_no, cmd_action,
 579                                                       cmd_oid, data_buf,
 580                                                       cmd_ptr);
 581                         break;
 582                 default:
 583                         ret = mwifiex_sta_prepare_cmd(priv, cmd_no, cmd_action,
 584                                                       cmd_oid, data_buf,
 585                                                       cmd_ptr);
 586                         break;
 587                 }
 588         } else {
 589                 ret = mwifiex_cmd_host_cmd(priv, cmd_ptr, data_buf);
 590                 cmd_node->cmd_flag |= CMD_F_HOSTCMD;
 591         }
 592
 593         /* Return error, since the command preparation failed */
 594         if (ret) {
 595                 mwifiex_dbg(adapter, ERROR,
 596                             "PREP_CMD: cmd %#x preparation failed\n",
 597                         cmd_no);
 598                 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
 599                 return -1;
 600         }
 601
 602         /* Send command */
 603         if (cmd_no == HostCmd_CMD_802_11_SCAN ||
 604             cmd_no == HostCmd_CMD_802_11_SCAN_EXT) {
 605                 mwifiex_queue_scan_cmd(priv, cmd_node);
 606         } else {
 607                 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
 608                 queue_work(adapter->workqueue, &adapter->main_work);
 609                 if (cmd_node->wait_q_enabled)
 610                         ret = mwifiex_wait_queue_complete(adapter, cmd_node);
 611         }
 612
 613         return ret;
 614 }
 615
 616 /*
 617  * This function returns a command to the command free queue.
 618  *
 619  * The function also calls the completion callback if required, before
 620  * cleaning the command node and re-inserting it into the free queue.
 621  */
 622 void
 623 mwifiex_insert_cmd_to_free_q(struct mwifiex_adapter *adapter,
 624                              struct cmd_ctrl_node *cmd_node)
 625 {
 626         unsigned long flags;
 627
 628         if (!cmd_node)
 629                 return;
 630
 631         if (cmd_node->wait_q_enabled)
 632                 mwifiex_complete_cmd(adapter, cmd_node);
 633         /* Clean the node */
 634         mwifiex_clean_cmd_node(adapter, cmd_node);
 635
 636         /* Insert node into cmd_free_q */
 637         spin_lock_irqsave(&adapter->cmd_free_q_lock, flags);
 638         list_add_tail(&cmd_node->list, &adapter->cmd_free_q);
 639         spin_unlock_irqrestore(&adapter->cmd_free_q_lock, flags);
 640 }
 641
 642 /* This function reuses a command node. */
 643 void mwifiex_recycle_cmd_node(struct mwifiex_adapter *adapter,
 644                               struct cmd_ctrl_node *cmd_node)
 645 {
 646         struct host_cmd_ds_command *host_cmd = (void *)cmd_node->cmd_skb->data;
 647
 648         mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
 649
 650         atomic_dec(&adapter->cmd_pending);
 651         mwifiex_dbg(adapter, CMD,
 652                     "cmd: FREE_CMD: cmd=%#x, cmd_pending=%d\n",
 653                 le16_to_cpu(host_cmd->command),
 654                 atomic_read(&adapter->cmd_pending));
 655 }
 656
 657 /*
 658  * This function queues a command to the command pending queue.
 659  *
 660  * This in effect adds the command to the command list to be executed.
 661  * Exit PS command is handled specially, by placing it always to the
 662  * front of the command queue.
 663  */
 664 void
 665 mwifiex_insert_cmd_to_pending_q(struct mwifiex_adapter *adapter,
 666                                 struct cmd_ctrl_node *cmd_node, u32 add_tail)
 667 {
 668         struct host_cmd_ds_command *host_cmd = NULL;
 669         u16 command;
 670         unsigned long flags;
 671
 672         host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
 673         if (!host_cmd) {
 674                 mwifiex_dbg(adapter, ERROR, "QUEUE_CMD: host_cmd is NULL\n");
 675                 return;
 676         }
 677
 678         command = le16_to_cpu(host_cmd->command);
 679
 680         /* Exit_PS command needs to be queued in the header always. */
 681         if (command == HostCmd_CMD_802_11_PS_MODE_ENH) {
 682                 struct host_cmd_ds_802_11_ps_mode_enh *pm =
 683                                                 &host_cmd->params.psmode_enh;
 684                 if ((le16_to_cpu(pm->action) == DIS_PS) ||
 685                     (le16_to_cpu(pm->action) == DIS_AUTO_PS)) {
 686                         if (adapter->ps_state != PS_STATE_AWAKE)
 687                                 add_tail = false;
 688                 }
 689         }
 690
 691         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 692         if (add_tail)
 693                 list_add_tail(&cmd_node->list, &adapter->cmd_pending_q);
 694         else
 695                 list_add(&cmd_node->list, &adapter->cmd_pending_q);
 696         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 697
 698         atomic_inc(&adapter->cmd_pending);
 699         mwifiex_dbg(adapter, CMD,
 700                     "cmd: QUEUE_CMD: cmd=%#x, cmd_pending=%d\n",
 701                 command, atomic_read(&adapter->cmd_pending));
 702 }
 703
 704 /*
 705  * This function executes the next command in command pending queue.
 706  *
 707  * This function will fail if a command is already in processing stage,
 708  * otherwise it will dequeue the first command from the command pending
 709  * queue and send to the firmware.
 710  *
 711  * If the device is currently in host sleep mode, any commands, except the
 712  * host sleep configuration command will de-activate the host sleep. For PS
 713  * mode, the function will put the firmware back to sleep if applicable.
 714  */
 715 int mwifiex_exec_next_cmd(struct mwifiex_adapter *adapter)
 716 {
 717         struct mwifiex_private *priv;
 718         struct cmd_ctrl_node *cmd_node;
 719         int ret = 0;
 720         struct host_cmd_ds_command *host_cmd;
 721         unsigned long cmd_flags;
 722         unsigned long cmd_pending_q_flags;
 723
 724         /* Check if already in processing */
 725         if (adapter->curr_cmd) {
 726                 mwifiex_dbg(adapter, FATAL,
 727                             "EXEC_NEXT_CMD: cmd in processing\n");
 728                 return -1;
 729         }
 730
 731         spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
 732         /* Check if any command is pending */
 733         spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_pending_q_flags);
 734         if (list_empty(&adapter->cmd_pending_q)) {
 735                 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
 736                                        cmd_pending_q_flags);
 737                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
 738                 return 0;
 739         }
 740         cmd_node = list_first_entry(&adapter->cmd_pending_q,
 741                                     struct cmd_ctrl_node, list);
 742         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
 743                                cmd_pending_q_flags);
 744
 745         host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
 746         priv = cmd_node->priv;
 747
 748         if (adapter->ps_state != PS_STATE_AWAKE) {
 749                 mwifiex_dbg(adapter, ERROR,
 750                             "%s: cannot send cmd in sleep state,\t"
 751                             "this should not happen\n", __func__);
 752                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
 753                 return ret;
 754         }
 755
 756         spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_pending_q_flags);
 757         list_del(&cmd_node->list);
 758         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
 759                                cmd_pending_q_flags);
 760
 761         spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
 762         ret = mwifiex_dnld_cmd_to_fw(priv, cmd_node);
 763         priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 764         /* Any command sent to the firmware when host is in sleep
 765          * mode should de-configure host sleep. We should skip the
 766          * host sleep configuration command itself though
 767          */
 768         if (priv && (host_cmd->command !=
 769              cpu_to_le16(HostCmd_CMD_802_11_HS_CFG_ENH))) {
 770                 if (adapter->hs_activated) {
 771                         adapter->is_hs_configured = false;
 772                         mwifiex_hs_activated_event(priv, false);
 773                 }
 774         }
 775
 776         return ret;
 777 }
 778
 779 /*
 780  * This function handles the command response.
 781  *
 782  * After processing, the function cleans the command node and puts
 783  * it back to the command free queue.
 784  */
 785 int mwifiex_process_cmdresp(struct mwifiex_adapter *adapter)
 786 {
 787         struct host_cmd_ds_command *resp;
 788         struct mwifiex_private *priv =
 789                 mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 790         int ret = 0;
 791         uint16_t orig_cmdresp_no;
 792         uint16_t cmdresp_no;
 793         uint16_t cmdresp_result;
 794         unsigned long flags;
 795
 796         /* Now we got response from FW, cancel the command timer */
 797         del_timer_sync(&adapter->cmd_timer);
 798
 799         if (!adapter->curr_cmd || !adapter->curr_cmd->resp_skb) {
 800                 resp = (struct host_cmd_ds_command *) adapter->upld_buf;
 801                 mwifiex_dbg(adapter, ERROR,
 802                             "CMD_RESP: NULL curr_cmd, %#x\n",
 803                             le16_to_cpu(resp->command));
 804                 return -1;
 805         }
 806
 807         adapter->is_cmd_timedout = 0;
 808
 809         resp = (struct host_cmd_ds_command *) adapter->curr_cmd->resp_skb->data;
 810         if (adapter->curr_cmd->cmd_flag & CMD_F_HOSTCMD) {
 811                 /* Copy original response back to response buffer */
 812                 struct mwifiex_ds_misc_cmd *hostcmd;
 813                 uint16_t size = le16_to_cpu(resp->size);
 814                 mwifiex_dbg(adapter, INFO,
 815                             "info: host cmd resp size = %d\n", size);
 816                 size = min_t(u16, size, MWIFIEX_SIZE_OF_CMD_BUFFER);
 817                 if (adapter->curr_cmd->data_buf) {
 818                         hostcmd = adapter->curr_cmd->data_buf;
 819                         hostcmd->len = size;
 820                         memcpy(hostcmd->cmd, resp, size);
 821                 }
 822         }
 823         orig_cmdresp_no = le16_to_cpu(resp->command);
 824
 825         /* Get BSS number and corresponding priv */
 826         priv = mwifiex_get_priv_by_id(adapter,
 827                              HostCmd_GET_BSS_NO(le16_to_cpu(resp->seq_num)),
 828                              HostCmd_GET_BSS_TYPE(le16_to_cpu(resp->seq_num)));
 829         if (!priv)
 830                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 831         /* Clear RET_BIT from HostCmd */
 832         resp->command = cpu_to_le16(orig_cmdresp_no & HostCmd_CMD_ID_MASK);
 833
 834         cmdresp_no = le16_to_cpu(resp->command);
 835         cmdresp_result = le16_to_cpu(resp->result);
 836
 837         /* Save the last command response to debug log */
 838         adapter->dbg.last_cmd_resp_index =
 839                         (adapter->dbg.last_cmd_resp_index + 1) % DBG_CMD_NUM;
 840         adapter->dbg.last_cmd_resp_id[adapter->dbg.last_cmd_resp_index] =
 841                                                                 orig_cmdresp_no;
 842
 843         mwifiex_dbg(adapter, CMD,
 844                     "cmd: CMD_RESP: 0x%x, result %d, len %d, seqno 0x%x\n",
 845                     orig_cmdresp_no, cmdresp_result,
 846                     le16_to_cpu(resp->size), le16_to_cpu(resp->seq_num));
 847         mwifiex_dbg_dump(adapter, CMD_D, "CMD_RESP buffer:", resp,
 848                          le16_to_cpu(resp->size));
 849
 850         if (!(orig_cmdresp_no & HostCmd_RET_BIT)) {
 851                 mwifiex_dbg(adapter, ERROR, "CMD_RESP: invalid cmd resp\n");
 852                 if (adapter->curr_cmd->wait_q_enabled)
 853                         adapter->cmd_wait_q.status = -1;
 854
 855                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 856                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
 857                 adapter->curr_cmd = NULL;
 858                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
 859                 return -1;
 860         }
 861
 862         if (adapter->curr_cmd->cmd_flag & CMD_F_HOSTCMD) {
 863                 adapter->curr_cmd->cmd_flag &= ~CMD_F_HOSTCMD;
 864                 if ((cmdresp_result == HostCmd_RESULT_OK) &&
 865                     (cmdresp_no == HostCmd_CMD_802_11_HS_CFG_ENH))
 866                         ret = mwifiex_ret_802_11_hs_cfg(priv, resp);
 867         } else {
 868                 /* handle response */
 869                 ret = mwifiex_process_sta_cmdresp(priv, cmdresp_no, resp);
 870         }
 871
 872         /* Check init command response */
 873         if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING) {
 874                 if (ret) {
 875                         mwifiex_dbg(adapter, ERROR,
 876                                     "%s: cmd %#x failed during\t"
 877                                     "initialization\n", __func__, cmdresp_no);
 878                         mwifiex_init_fw_complete(adapter);
 879                         return -1;
 880                 } else if (adapter->last_init_cmd == cmdresp_no)
 881                         adapter->hw_status = MWIFIEX_HW_STATUS_INIT_DONE;
 882         }
 883
 884         if (adapter->curr_cmd) {
 885                 if (adapter->curr_cmd->wait_q_enabled)
 886                         adapter->cmd_wait_q.status = ret;
 887
 888                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 889
 890                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
 891                 adapter->curr_cmd = NULL;
 892                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
 893         }
 894
 895         return ret;
 896 }
 897
 898 /*
 899  * This function handles the timeout of command sending.
 900  *
 901  * It will re-send the same command again.
 902  */
 903 void
 904 mwifiex_cmd_timeout_func(unsigned long function_context)
 905 {
 906         struct mwifiex_adapter *adapter =
 907                 (struct mwifiex_adapter *) function_context;
 908         struct cmd_ctrl_node *cmd_node;
 909
 910         adapter->is_cmd_timedout = 1;
 911         if (!adapter->curr_cmd) {
 912                 mwifiex_dbg(adapter, ERROR,
 913                             "cmd: empty curr_cmd\n");
 914                 return;
 915         }
 916         cmd_node = adapter->curr_cmd;
 917         if (cmd_node) {
 918                 adapter->dbg.timeout_cmd_id =
 919                         adapter->dbg.last_cmd_id[adapter->dbg.last_cmd_index];
 920                 adapter->dbg.timeout_cmd_act =
 921                         adapter->dbg.last_cmd_act[adapter->dbg.last_cmd_index];
 922                 mwifiex_dbg(adapter, MSG,
 923                             "%s: Timeout cmd id = %#x, act = %#x\n", __func__,
 924                             adapter->dbg.timeout_cmd_id,
 925                             adapter->dbg.timeout_cmd_act);
 926
 927                 mwifiex_dbg(adapter, MSG,
 928                             "num_data_h2c_failure = %d\n",
 929                             adapter->dbg.num_tx_host_to_card_failure);
 930                 mwifiex_dbg(adapter, MSG,
 931                             "num_cmd_h2c_failure = %d\n",
 932                             adapter->dbg.num_cmd_host_to_card_failure);
 933
 934                 mwifiex_dbg(adapter, MSG,
 935                             "is_cmd_timedout = %d\n",
 936                             adapter->is_cmd_timedout);
 937                 mwifiex_dbg(adapter, MSG,
 938                             "num_tx_timeout = %d\n",
 939                             adapter->dbg.num_tx_timeout);
 940
 941                 mwifiex_dbg(adapter, MSG,
 942                             "last_cmd_index = %d\n",
 943                             adapter->dbg.last_cmd_index);
 944                 mwifiex_dbg(adapter, MSG,
 945                             "last_cmd_id: %*ph\n",
 946                             (int)sizeof(adapter->dbg.last_cmd_id),
 947                             adapter->dbg.last_cmd_id);
 948                 mwifiex_dbg(adapter, MSG,
 949                             "last_cmd_act: %*ph\n",
 950                             (int)sizeof(adapter->dbg.last_cmd_act),
 951                             adapter->dbg.last_cmd_act);
 952
 953                 mwifiex_dbg(adapter, MSG,
 954                             "last_cmd_resp_index = %d\n",
 955                             adapter->dbg.last_cmd_resp_index);
 956                 mwifiex_dbg(adapter, MSG,
 957                             "last_cmd_resp_id: %*ph\n",
 958                             (int)sizeof(adapter->dbg.last_cmd_resp_id),
 959                             adapter->dbg.last_cmd_resp_id);
 960
 961                 mwifiex_dbg(adapter, MSG,
 962                             "last_event_index = %d\n",
 963                             adapter->dbg.last_event_index);
 964                 mwifiex_dbg(adapter, MSG,
 965                             "last_event: %*ph\n",
 966                             (int)sizeof(adapter->dbg.last_event),
 967                             adapter->dbg.last_event);
 968
 969                 mwifiex_dbg(adapter, MSG,
 970                             "data_sent=%d cmd_sent=%d\n",
 971                             adapter->data_sent, adapter->cmd_sent);
 972
 973                 mwifiex_dbg(adapter, MSG,
 974                             "ps_mode=%d ps_state=%d\n",
 975                             adapter->ps_mode, adapter->ps_state);
 976
 977                 if (cmd_node->wait_q_enabled) {
 978                         adapter->cmd_wait_q.status = -ETIMEDOUT;
 979                         mwifiex_cancel_pending_ioctl(adapter);
 980                 }
 981         }
 982         if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING) {
 983                 mwifiex_init_fw_complete(adapter);
 984                 return;
 985         }
 986
 987         if (adapter->if_ops.device_dump)
 988                 adapter->if_ops.device_dump(adapter);
 989
 990         if (adapter->if_ops.card_reset)
 991                 adapter->if_ops.card_reset(adapter);
 992 }
 993
 994 /*
 995  * This function cancels all the pending commands.
 996  *
 997  * The current command, all commands in command pending queue and all scan
 998  * commands in scan pending queue are cancelled. All the completion callbacks
 999  * are called with failure status to ensure cleanup.
1000  */
1001 void
1002 mwifiex_cancel_all_pending_cmd(struct mwifiex_adapter *adapter)
1003 {
1004         struct cmd_ctrl_node *cmd_node = NULL, *tmp_node;
1005         unsigned long flags, cmd_flags;
1006         struct mwifiex_private *priv;
1007         int i;
1008
1009         spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
1010         /* Cancel current cmd */
1011         if ((adapter->curr_cmd) && (adapter->curr_cmd->wait_q_enabled)) {
1012                 adapter->curr_cmd->wait_q_enabled = false;
1013                 adapter->cmd_wait_q.status = -1;
1014                 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1015                 /* no recycle probably wait for response */
1016         }
1017         /* Cancel all pending command */
1018         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
1019         list_for_each_entry_safe(cmd_node, tmp_node,
1020                                  &adapter->cmd_pending_q, list) {
1021                 list_del(&cmd_node->list);
1022                 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
1023
1024                 if (cmd_node->wait_q_enabled)
1025                         adapter->cmd_wait_q.status = -1;
1026                 mwifiex_recycle_cmd_node(adapter, cmd_node);
1027                 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
1028         }
1029         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
1030         spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
1031
1032         /* Cancel all pending scan command */
1033         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1034         list_for_each_entry_safe(cmd_node, tmp_node,
1035                                  &adapter->scan_pending_q, list) {
1036                 list_del(&cmd_node->list);
1037
1038                 cmd_node->wait_q_enabled = false;
1039                 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
1040         }
1041         spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1042
1043         if (adapter->scan_processing) {
1044                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
1045                 adapter->scan_processing = false;
1046                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
1047                 for (i = 0; i < adapter->priv_num; i++) {
1048                         priv = adapter->priv[i];
1049                         if (!priv)
1050                                 continue;
1051                         if (priv->scan_request) {
1052                                 mwifiex_dbg(adapter, WARN, "info: aborting scan\n");
1053                                 cfg80211_scan_done(priv->scan_request, 1);
1054                                 priv->scan_request = NULL;
1055                         }
1056                 }
1057         }
1058 }
1059
1060 /*
1061  * This function cancels all pending commands that matches with
1062  * the given IOCTL request.
1063  *
1064  * Both the current command buffer and the pending command queue are
1065  * searched for matching IOCTL request. The completion callback of
1066  * the matched command is called with failure status to ensure cleanup.
1067  * In case of scan commands, all pending commands in scan pending queue
1068  * are cancelled.
1069  */
1070 void
1071 mwifiex_cancel_pending_ioctl(struct mwifiex_adapter *adapter)
1072 {
1073         struct cmd_ctrl_node *cmd_node = NULL, *tmp_node = NULL;
1074         unsigned long cmd_flags;
1075         unsigned long scan_pending_q_flags;
1076         struct mwifiex_private *priv;
1077         int i;
1078
1079         if ((adapter->curr_cmd) &&
1080             (adapter->curr_cmd->wait_q_enabled)) {
1081                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
1082                 cmd_node = adapter->curr_cmd;
1083                 /* setting curr_cmd to NULL is quite dangerous, because
1084                  * mwifiex_process_cmdresp checks curr_cmd to be != NULL
1085                  * at the beginning then relies on it and dereferences
1086                  * it at will
1087                  * this probably works since mwifiex_cmd_timeout_func
1088                  * is the only caller of this function and responses
1089                  * at that point
1090                  */
1091                 adapter->curr_cmd = NULL;
1092                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
1093
1094                 mwifiex_recycle_cmd_node(adapter, cmd_node);
1095         }
1096
1097         /* Cancel all pending scan command */
1098         spin_lock_irqsave(&adapter->scan_pending_q_lock,
1099                           scan_pending_q_flags);
1100         list_for_each_entry_safe(cmd_node, tmp_node,
1101                                  &adapter->scan_pending_q, list) {
1102                 list_del(&cmd_node->list);
1103                 cmd_node->wait_q_enabled = false;
1104                 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
1105         }
1106         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1107                                scan_pending_q_flags);
1108
1109         if (adapter->scan_processing) {
1110                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
1111                 adapter->scan_processing = false;
1112                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
1113                 for (i = 0; i < adapter->priv_num; i++) {
1114                         priv = adapter->priv[i];
1115                         if (!priv)
1116                                 continue;
1117                         if (priv->scan_request) {
1118                                 mwifiex_dbg(adapter, WARN, "info: aborting scan\n");
1119                                 cfg80211_scan_done(priv->scan_request, 1);
1120                                 priv->scan_request = NULL;
1121                         }
1122                 }
1123         }
1124 }
1125
1126 /*
1127  * This function sends the sleep confirm command to firmware, if
1128  * possible.
1129  *
1130  * The sleep confirm command cannot be issued if command response,
1131  * data response or event response is awaiting handling, or if we
1132  * are in the middle of sending a command, or expecting a command
1133  * response.
1134  */
1135 void
1136 mwifiex_check_ps_cond(struct mwifiex_adapter *adapter)
1137 {
1138         if (!adapter->cmd_sent &&
1139             !adapter->curr_cmd && !IS_CARD_RX_RCVD(adapter))
1140                 mwifiex_dnld_sleep_confirm_cmd(adapter);
1141         else
1142                 mwifiex_dbg(adapter, CMD,
1143                             "cmd: Delay Sleep Confirm (%s%s%s)\n",
1144                             (adapter->cmd_sent) ? "D" : "",
1145                             (adapter->curr_cmd) ? "C" : "",
1146                             (IS_CARD_RX_RCVD(adapter)) ? "R" : "");
1147 }
1148
1149 /*
1150  * This function sends a Host Sleep activated event to applications.
1151  *
1152  * This event is generated by the driver, with a blank event body.
1153  */
1154 void
1155 mwifiex_hs_activated_event(struct mwifiex_private *priv, u8 activated)
1156 {
1157         if (activated) {
1158                 if (priv->adapter->is_hs_configured) {
1159                         priv->adapter->hs_activated = true;
1160                         mwifiex_update_rxreor_flags(priv->adapter,
1161                                                     RXREOR_FORCE_NO_DROP);
1162                         mwifiex_dbg(priv->adapter, EVENT,
1163                                     "event: hs_activated\n");
1164                         priv->adapter->hs_activate_wait_q_woken = true;
1165                         wake_up_interruptible(
1166                                 &priv->adapter->hs_activate_wait_q);
1167                 } else {
1168                         mwifiex_dbg(priv->adapter, EVENT,
1169                                     "event: HS not configured\n");
1170                 }
1171         } else {
1172                 mwifiex_dbg(priv->adapter, EVENT,
1173                             "event: hs_deactivated\n");
1174                 priv->adapter->hs_activated = false;
1175         }
1176 }
1177
1178 /*
1179  * This function handles the command response of a Host Sleep configuration
1180  * command.
1181  *
1182  * Handling includes changing the header fields into CPU format
1183  * and setting the current host sleep activation status in driver.
1184  *
1185  * In case host sleep status change, the function generates an event to
1186  * notify the applications.
1187  */
1188 int mwifiex_ret_802_11_hs_cfg(struct mwifiex_private *priv,
1189                               struct host_cmd_ds_command *resp)
1190 {
1191         struct mwifiex_adapter *adapter = priv->adapter;
1192         struct host_cmd_ds_802_11_hs_cfg_enh *phs_cfg =
1193                 &resp->params.opt_hs_cfg;
1194         uint32_t conditions = le32_to_cpu(phs_cfg->params.hs_config.conditions);
1195
1196         if (phs_cfg->action == cpu_to_le16(HS_ACTIVATE) &&
1197             adapter->iface_type != MWIFIEX_USB) {
1198                 mwifiex_hs_activated_event(priv, true);
1199                 return 0;
1200         } else {
1201                 mwifiex_dbg(adapter, CMD,
1202                             "cmd: CMD_RESP: HS_CFG cmd reply\t"
1203                             " result=%#x, conditions=0x%x gpio=0x%x gap=0x%x\n",
1204                             resp->result, conditions,
1205                             phs_cfg->params.hs_config.gpio,
1206                             phs_cfg->params.hs_config.gap);
1207         }
1208         if (conditions != HS_CFG_CANCEL) {
1209                 adapter->is_hs_configured = true;
1210                 if (adapter->iface_type == MWIFIEX_USB)
1211                         mwifiex_hs_activated_event(priv, true);
1212         } else {
1213                 adapter->is_hs_configured = false;
1214                 if (adapter->hs_activated)
1215                         mwifiex_hs_activated_event(priv, false);
1216         }
1217
1218         return 0;
1219 }
1220
1221 /*
1222  * This function wakes up the adapter and generates a Host Sleep
1223  * cancel event on receiving the power up interrupt.
1224  */
1225 void
1226 mwifiex_process_hs_config(struct mwifiex_adapter *adapter)
1227 {
1228         mwifiex_dbg(adapter, INFO,
1229                     "info: %s: auto cancelling host sleep\t"
1230                     "since there is interrupt from the firmware\n",
1231                     __func__);
1232
1233         adapter->if_ops.wakeup(adapter);
1234         adapter->hs_activated = false;
1235         adapter->is_hs_configured = false;
1236         adapter->is_suspended = false;
1237         mwifiex_hs_activated_event(mwifiex_get_priv(adapter,
1238                                                     MWIFIEX_BSS_ROLE_ANY),
1239                                    false);
1240 }
1241 EXPORT_SYMBOL_GPL(mwifiex_process_hs_config);
1242
1243 /*
1244  * This function handles the command response of a sleep confirm command.
1245  *
1246  * The function sets the card state to SLEEP if the response indicates success.
1247  */
1248 void
1249 mwifiex_process_sleep_confirm_resp(struct mwifiex_adapter *adapter,
1250                                    u8 *pbuf, u32 upld_len)
1251 {
1252         struct host_cmd_ds_command *cmd = (struct host_cmd_ds_command *) pbuf;
1253         struct mwifiex_private *priv =
1254                 mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1255         uint16_t result = le16_to_cpu(cmd->result);
1256         uint16_t command = le16_to_cpu(cmd->command);
1257         uint16_t seq_num = le16_to_cpu(cmd->seq_num);
1258
1259         if (!upld_len) {
1260                 mwifiex_dbg(adapter, ERROR,
1261                             "%s: cmd size is 0\n", __func__);
1262                 return;
1263         }
1264
1265         mwifiex_dbg(adapter, CMD,
1266                     "cmd: CMD_RESP: 0x%x, result %d, len %d, seqno 0x%x\n",
1267                     command, result, le16_to_cpu(cmd->size), seq_num);
1268
1269         /* Get BSS number and corresponding priv */
1270         priv = mwifiex_get_priv_by_id(adapter, HostCmd_GET_BSS_NO(seq_num),
1271                                       HostCmd_GET_BSS_TYPE(seq_num));
1272         if (!priv)
1273                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1274
1275         /* Update sequence number */
1276         seq_num = HostCmd_GET_SEQ_NO(seq_num);
1277         /* Clear RET_BIT from HostCmd */
1278         command &= HostCmd_CMD_ID_MASK;
1279
1280         if (command != HostCmd_CMD_802_11_PS_MODE_ENH) {
1281                 mwifiex_dbg(adapter, ERROR,
1282                             "%s: rcvd unexpected resp for cmd %#x, result = %x\n",
1283                             __func__, command, result);
1284                 return;
1285         }
1286
1287         if (result) {
1288                 mwifiex_dbg(adapter, ERROR,
1289                             "%s: sleep confirm cmd failed\n",
1290                             __func__);
1291                 adapter->pm_wakeup_card_req = false;
1292                 adapter->ps_state = PS_STATE_AWAKE;
1293                 return;
1294         }
1295         adapter->pm_wakeup_card_req = true;
1296         if (adapter->is_hs_configured)
1297                 mwifiex_hs_activated_event(mwifiex_get_priv
1298                                                 (adapter, MWIFIEX_BSS_ROLE_ANY),
1299                                            true);
1300         adapter->ps_state = PS_STATE_SLEEP;
1301         cmd->command = cpu_to_le16(command);
1302         cmd->seq_num = cpu_to_le16(seq_num);
1303 }
1304 EXPORT_SYMBOL_GPL(mwifiex_process_sleep_confirm_resp);
1305
1306 /*
1307  * This function prepares an enhanced power mode command.
1308  *
1309  * This function can be used to disable power save or to configure
1310  * power save with auto PS or STA PS or auto deep sleep.
1311  *
1312  * Preparation includes -
1313  *      - Setting command ID, action and proper size
1314  *      - Setting Power Save bitmap, PS parameters TLV, PS mode TLV,
1315  *        auto deep sleep TLV (as required)
1316  *      - Ensuring correct endian-ness
1317  */
1318 int mwifiex_cmd_enh_power_mode(struct mwifiex_private *priv,
1319                                struct host_cmd_ds_command *cmd,
1320                                u16 cmd_action, uint16_t ps_bitmap,
1321                                struct mwifiex_ds_auto_ds *auto_ds)
1322 {
1323         struct host_cmd_ds_802_11_ps_mode_enh *psmode_enh =
1324                 &cmd->params.psmode_enh;
1325         u8 *tlv;
1326         u16 cmd_size = 0;
1327
1328         cmd->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
1329         if (cmd_action == DIS_AUTO_PS) {
1330                 psmode_enh->action = cpu_to_le16(DIS_AUTO_PS);
1331                 psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
1332                 cmd->size = cpu_to_le16(S_DS_GEN + sizeof(psmode_enh->action) +
1333                                         sizeof(psmode_enh->params.ps_bitmap));
1334         } else if (cmd_action == GET_PS) {
1335                 psmode_enh->action = cpu_to_le16(GET_PS);
1336                 psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
1337                 cmd->size = cpu_to_le16(S_DS_GEN + sizeof(psmode_enh->action) +
1338                                         sizeof(psmode_enh->params.ps_bitmap));
1339         } else if (cmd_action == EN_AUTO_PS) {
1340                 psmode_enh->action = cpu_to_le16(EN_AUTO_PS);
1341                 psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
1342                 cmd_size = S_DS_GEN + sizeof(psmode_enh->action) +
1343                                         sizeof(psmode_enh->params.ps_bitmap);
1344                 tlv = (u8 *) cmd + cmd_size;
1345                 if (ps_bitmap & BITMAP_STA_PS) {
1346                         struct mwifiex_adapter *adapter = priv->adapter;
1347                         struct mwifiex_ie_types_ps_param *ps_tlv =
1348                                 (struct mwifiex_ie_types_ps_param *) tlv;
1349                         struct mwifiex_ps_param *ps_mode = &ps_tlv->param;
1350                         ps_tlv->header.type = cpu_to_le16(TLV_TYPE_PS_PARAM);
1351                         ps_tlv->header.len = cpu_to_le16(sizeof(*ps_tlv) -
1352                                         sizeof(struct mwifiex_ie_types_header));
1353                         cmd_size += sizeof(*ps_tlv);
1354                         tlv += sizeof(*ps_tlv);
1355                         mwifiex_dbg(priv->adapter, CMD,
1356                                     "cmd: PS Command: Enter PS\n");
1357                         ps_mode->null_pkt_interval =
1358                                         cpu_to_le16(adapter->null_pkt_interval);
1359                         ps_mode->multiple_dtims =
1360                                         cpu_to_le16(adapter->multiple_dtim);
1361                         ps_mode->bcn_miss_timeout =
1362                                         cpu_to_le16(adapter->bcn_miss_time_out);
1363                         ps_mode->local_listen_interval =
1364                                 cpu_to_le16(adapter->local_listen_interval);
1365                         ps_mode->adhoc_wake_period =
1366                                 cpu_to_le16(adapter->adhoc_awake_period);
1367                         ps_mode->delay_to_ps =
1368                                         cpu_to_le16(adapter->delay_to_ps);
1369                         ps_mode->mode = cpu_to_le16(adapter->enhanced_ps_mode);
1370
1371                 }
1372                 if (ps_bitmap & BITMAP_AUTO_DS) {
1373                         struct mwifiex_ie_types_auto_ds_param *auto_ds_tlv =
1374                                 (struct mwifiex_ie_types_auto_ds_param *) tlv;
1375                         u16 idletime = 0;
1376
1377                         auto_ds_tlv->header.type =
1378                                 cpu_to_le16(TLV_TYPE_AUTO_DS_PARAM);
1379                         auto_ds_tlv->header.len =
1380                                 cpu_to_le16(sizeof(*auto_ds_tlv) -
1381                                         sizeof(struct mwifiex_ie_types_header));
1382                         cmd_size += sizeof(*auto_ds_tlv);
1383                         tlv += sizeof(*auto_ds_tlv);
1384                         if (auto_ds)
1385                                 idletime = auto_ds->idle_time;
1386                         mwifiex_dbg(priv->adapter, CMD,
1387                                     "cmd: PS Command: Enter Auto Deep Sleep\n");
1388                         auto_ds_tlv->deep_sleep_timeout = cpu_to_le16(idletime);
1389                 }
1390                 cmd->size = cpu_to_le16(cmd_size);
1391         }
1392         return 0;
1393 }
1394
1395 /*
1396  * This function handles the command response of an enhanced power mode
1397  * command.
1398  *
1399  * Handling includes changing the header fields into CPU format
1400  * and setting the current enhanced power mode in driver.
1401  */
1402 int mwifiex_ret_enh_power_mode(struct mwifiex_private *priv,
1403                                struct host_cmd_ds_command *resp,
1404                                struct mwifiex_ds_pm_cfg *pm_cfg)
1405 {
1406         struct mwifiex_adapter *adapter = priv->adapter;
1407         struct host_cmd_ds_802_11_ps_mode_enh *ps_mode =
1408                 &resp->params.psmode_enh;
1409         uint16_t action = le16_to_cpu(ps_mode->action);
1410         uint16_t ps_bitmap = le16_to_cpu(ps_mode->params.ps_bitmap);
1411         uint16_t auto_ps_bitmap =
1412                 le16_to_cpu(ps_mode->params.ps_bitmap);
1413
1414         mwifiex_dbg(adapter, INFO,
1415                     "info: %s: PS_MODE cmd reply result=%#x action=%#X\n",
1416                     __func__, resp->result, action);
1417         if (action == EN_AUTO_PS) {
1418                 if (auto_ps_bitmap & BITMAP_AUTO_DS) {
1419                         mwifiex_dbg(adapter, CMD,
1420                                     "cmd: Enabled auto deep sleep\n");
1421                         priv->adapter->is_deep_sleep = true;
1422                 }
1423                 if (auto_ps_bitmap & BITMAP_STA_PS) {
1424                         mwifiex_dbg(adapter, CMD,
1425                                     "cmd: Enabled STA power save\n");
1426                         if (adapter->sleep_period.period)
1427                                 mwifiex_dbg(adapter, CMD,
1428                                             "cmd: set to uapsd/pps mode\n");
1429                 }
1430         } else if (action == DIS_AUTO_PS) {
1431                 if (ps_bitmap & BITMAP_AUTO_DS) {
1432                         priv->adapter->is_deep_sleep = false;
1433                         mwifiex_dbg(adapter, CMD,
1434                                     "cmd: Disabled auto deep sleep\n");
1435                 }
1436                 if (ps_bitmap & BITMAP_STA_PS) {
1437                         mwifiex_dbg(adapter, CMD,
1438                                     "cmd: Disabled STA power save\n");
1439                         if (adapter->sleep_period.period) {
1440                                 adapter->delay_null_pkt = false;
1441                                 adapter->tx_lock_flag = false;
1442                                 adapter->pps_uapsd_mode = false;
1443                         }
1444                 }
1445         } else if (action == GET_PS) {
1446                 if (ps_bitmap & BITMAP_STA_PS)
1447                         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_PSP;
1448                 else
1449                         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
1450
1451                 mwifiex_dbg(adapter, CMD,
1452                             "cmd: ps_bitmap=%#x\n", ps_bitmap);
1453
1454                 if (pm_cfg) {
1455                         /* This section is for get power save mode */
1456                         if (ps_bitmap & BITMAP_STA_PS)
1457                                 pm_cfg->param.ps_mode = 1;
1458                         else
1459                                 pm_cfg->param.ps_mode = 0;
1460                 }
1461         }
1462         return 0;
1463 }
1464
1465 /*
1466  * This function prepares command to get hardware specifications.
1467  *
1468  * Preparation includes -
1469  *      - Setting command ID, action and proper size
1470  *      - Setting permanent address parameter
1471  *      - Ensuring correct endian-ness
1472  */
1473 int mwifiex_cmd_get_hw_spec(struct mwifiex_private *priv,
1474                             struct host_cmd_ds_command *cmd)
1475 {
1476         struct host_cmd_ds_get_hw_spec *hw_spec = &cmd->params.hw_spec;
1477
1478         cmd->command = cpu_to_le16(HostCmd_CMD_GET_HW_SPEC);
1479         cmd->size =
1480                 cpu_to_le16(sizeof(struct host_cmd_ds_get_hw_spec) + S_DS_GEN);
1481         memcpy(hw_spec->permanent_addr, priv->curr_addr, ETH_ALEN);
1482
1483         return 0;
1484 }
1485
1486 /*
1487  * This function handles the command response of get hardware
1488  * specifications.
1489  *
1490  * Handling includes changing the header fields into CPU format
1491  * and saving/updating the following parameters in driver -
1492  *      - Firmware capability information
1493  *      - Firmware band settings
1494  *      - Ad-hoc start band and channel
1495  *      - Ad-hoc 11n activation status
1496  *      - Firmware release number
1497  *      - Number of antennas
1498  *      - Hardware address
1499  *      - Hardware interface version
1500  *      - Firmware version
1501  *      - Region code
1502  *      - 11n capabilities
1503  *      - MCS support fields
1504  *      - MP end port
1505  */
1506 int mwifiex_ret_get_hw_spec(struct mwifiex_private *priv,
1507                             struct host_cmd_ds_command *resp)
1508 {
1509         struct host_cmd_ds_get_hw_spec *hw_spec = &resp->params.hw_spec;
1510         struct mwifiex_adapter *adapter = priv->adapter;
1511         struct mwifiex_ie_types_header *tlv;
1512         struct hw_spec_api_rev *api_rev;
1513         u16 resp_size, api_id;
1514         int i, left_len, parsed_len = 0;
1515
1516         adapter->fw_cap_info = le32_to_cpu(hw_spec->fw_cap_info);
1517
1518         if (IS_SUPPORT_MULTI_BANDS(adapter))
1519                 adapter->fw_bands = (u8) GET_FW_DEFAULT_BANDS(adapter);
1520         else
1521                 adapter->fw_bands = BAND_B;
1522
1523         adapter->config_bands = adapter->fw_bands;
1524
1525         if (adapter->fw_bands & BAND_A) {
1526                 if (adapter->fw_bands & BAND_GN) {
1527                         adapter->config_bands |= BAND_AN;
1528                         adapter->fw_bands |= BAND_AN;
1529                 }
1530                 if (adapter->fw_bands & BAND_AN) {
1531                         adapter->adhoc_start_band = BAND_A | BAND_AN;
1532                         adapter->adhoc_11n_enabled = true;
1533                 } else {
1534                         adapter->adhoc_start_band = BAND_A;
1535                 }
1536                 priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL_A;
1537         } else if (adapter->fw_bands & BAND_GN) {
1538                 adapter->adhoc_start_band = BAND_G | BAND_B | BAND_GN;
1539                 priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
1540                 adapter->adhoc_11n_enabled = true;
1541         } else if (adapter->fw_bands & BAND_G) {
1542                 adapter->adhoc_start_band = BAND_G | BAND_B;
1543                 priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
1544         } else if (adapter->fw_bands & BAND_B) {
1545                 adapter->adhoc_start_band = BAND_B;
1546                 priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
1547         }
1548
1549         adapter->fw_release_number = le32_to_cpu(hw_spec->fw_release_number);
1550         adapter->fw_api_ver = (adapter->fw_release_number >> 16) & 0xff;
1551         adapter->number_of_antenna = le16_to_cpu(hw_spec->number_of_antenna);
1552
1553         if (le32_to_cpu(hw_spec->dot_11ac_dev_cap)) {
1554                 adapter->is_hw_11ac_capable = true;
1555
1556                 /* Copy 11AC cap */
1557                 adapter->hw_dot_11ac_dev_cap =
1558                                         le32_to_cpu(hw_spec->dot_11ac_dev_cap);
1559                 adapter->usr_dot_11ac_dev_cap_bg = adapter->hw_dot_11ac_dev_cap
1560                                         & ~MWIFIEX_DEF_11AC_CAP_BF_RESET_MASK;
1561                 adapter->usr_dot_11ac_dev_cap_a = adapter->hw_dot_11ac_dev_cap
1562                                         & ~MWIFIEX_DEF_11AC_CAP_BF_RESET_MASK;
1563
1564                 /* Copy 11AC mcs */
1565                 adapter->hw_dot_11ac_mcs_support =
1566                                 le32_to_cpu(hw_spec->dot_11ac_mcs_support);
1567                 adapter->usr_dot_11ac_mcs_support =
1568                                         adapter->hw_dot_11ac_mcs_support;
1569         } else {
1570                 adapter->is_hw_11ac_capable = false;
1571         }
1572
1573         resp_size = le16_to_cpu(resp->size) - S_DS_GEN;
1574         if (resp_size > sizeof(struct host_cmd_ds_get_hw_spec)) {
1575                 /* we have variable HW SPEC information */
1576                 left_len = resp_size - sizeof(struct host_cmd_ds_get_hw_spec);
1577                 while (left_len > sizeof(struct mwifiex_ie_types_header)) {
1578                         tlv = (void *)&hw_spec->tlvs + parsed_len;
1579                         switch (le16_to_cpu(tlv->type)) {
1580                         case TLV_TYPE_API_REV:
1581                                 api_rev = (struct hw_spec_api_rev *)tlv;
1582                                 api_id = le16_to_cpu(api_rev->api_id);
1583                                 switch (api_id) {
1584                                 case KEY_API_VER_ID:
1585                                         adapter->key_api_major_ver =
1586                                                         api_rev->major_ver;
1587                                         adapter->key_api_minor_ver =
1588                                                         api_rev->minor_ver;
1589                                         mwifiex_dbg(adapter, INFO,
1590                                                     "key_api v%d.%d\n",
1591                                                     adapter->key_api_major_ver,
1592                                                     adapter->key_api_minor_ver);
1593                                         break;
1594                                 case FW_API_VER_ID:
1595                                         adapter->fw_api_ver =
1596                                                         api_rev->major_ver;
1597                                         mwifiex_dbg(adapter, INFO,
1598                                                     "Firmware api version %d\n",
1599                                                     adapter->fw_api_ver);
1600                                         break;
1601                                 default:
1602                                         mwifiex_dbg(adapter, FATAL,
1603                                                     "Unknown api_id: %d\n",
1604                                                     api_id);
1605                                         break;
1606                                 }
1607                                 break;
1608                         default:
1609                                 mwifiex_dbg(adapter, FATAL,
1610                                             "Unknown GET_HW_SPEC TLV type: %#x\n",
1611                                             le16_to_cpu(tlv->type));
1612                                 break;
1613                         }
1614                         parsed_len += le16_to_cpu(tlv->len) +
1615                                       sizeof(struct mwifiex_ie_types_header);
1616                         left_len -= le16_to_cpu(tlv->len) +
1617                                       sizeof(struct mwifiex_ie_types_header);
1618                 }
1619         }
1620
1621         mwifiex_dbg(adapter, INFO,
1622                     "info: GET_HW_SPEC: fw_release_number- %#x\n",
1623                     adapter->fw_release_number);
1624         mwifiex_dbg(adapter, INFO,
1625                     "info: GET_HW_SPEC: permanent addr: %pM\n",
1626                     hw_spec->permanent_addr);
1627         mwifiex_dbg(adapter, INFO,
1628                     "info: GET_HW_SPEC: hw_if_version=%#x version=%#x\n",
1629                     le16_to_cpu(hw_spec->hw_if_version),
1630                     le16_to_cpu(hw_spec->version));
1631
1632         ether_addr_copy(priv->adapter->perm_addr, hw_spec->permanent_addr);
1633         adapter->region_code = le16_to_cpu(hw_spec->region_code);
1634
1635         for (i = 0; i < MWIFIEX_MAX_REGION_CODE; i++)
1636                 /* Use the region code to search for the index */
1637                 if (adapter->region_code == region_code_index[i])
1638                         break;
1639
1640         /* If it's unidentified region code, use the default (USA) */
1641         if (i >= MWIFIEX_MAX_REGION_CODE) {
1642                 adapter->region_code = 0x10;
1643                 mwifiex_dbg(adapter, WARN,
1644                             "cmd: unknown region code, use default (USA)\n");
1645         }
1646
1647         adapter->hw_dot_11n_dev_cap = le32_to_cpu(hw_spec->dot_11n_dev_cap);
1648         adapter->hw_dev_mcs_support = hw_spec->dev_mcs_support;
1649         adapter->user_dev_mcs_support = adapter->hw_dev_mcs_support;
1650
1651         if (adapter->if_ops.update_mp_end_port)
1652                 adapter->if_ops.update_mp_end_port(adapter,
1653                                         le16_to_cpu(hw_spec->mp_end_port));
1654
1655         if (adapter->fw_api_ver == MWIFIEX_FW_V15)
1656                 adapter->scan_chan_gap_enabled = true;
1657
1658         return 0;
1659 }