drivers/net/wireless/mwifiex/cmdevt.c

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