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         /* Set command sequence number */
 161         adapter->seq_num++;
 162         host_cmd->seq_num = cpu_to_le16(HostCmd_SET_SEQ_NO_BSS_INFO
 163                                         (adapter->seq_num,
 164                                          cmd_node->priv->bss_num,
 165                                          cmd_node->priv->bss_type));
 166
 167         spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
 168         adapter->curr_cmd = cmd_node;
 169         spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
 170
 171         cmd_code = le16_to_cpu(host_cmd->command);
 172         cmd_size = le16_to_cpu(host_cmd->size);
 173
 174         /* Adjust skb length */
 175         if (cmd_node->cmd_skb->len > cmd_size)
 176                 /*
 177                  * cmd_size is less than sizeof(struct host_cmd_ds_command).
 178                  * Trim off the unused portion.
 179                  */
 180                 skb_trim(cmd_node->cmd_skb, cmd_size);
 181         else if (cmd_node->cmd_skb->len < cmd_size)
 182                 /*
 183                  * cmd_size is larger than sizeof(struct host_cmd_ds_command)
 184                  * because we have appended custom IE TLV. Increase skb length
 185                  * accordingly.
 186                  */
 187                 skb_put(cmd_node->cmd_skb, cmd_size - cmd_node->cmd_skb->len);
 188
 189         do_gettimeofday(&tstamp);
 190         dev_dbg(adapter->dev, "cmd: DNLD_CMD: (%lu.%lu): %#x, act %#x, len %d,"
 191                 " seqno %#x\n",
 192                 tstamp.tv_sec, tstamp.tv_usec, cmd_code,
 193                 le16_to_cpu(*(__le16 *) ((u8 *) host_cmd + S_DS_GEN)), cmd_size,
 194                 le16_to_cpu(host_cmd->seq_num));
 195
 196         if (adapter->iface_type == MWIFIEX_USB) {
 197                 tmp = cpu_to_le32(MWIFIEX_USB_TYPE_CMD);
 198                 skb_push(cmd_node->cmd_skb, MWIFIEX_TYPE_LEN);
 199                 memcpy(cmd_node->cmd_skb->data, &tmp, MWIFIEX_TYPE_LEN);
 200                 adapter->cmd_sent = true;
 201                 ret = adapter->if_ops.host_to_card(adapter,
 202                                                    MWIFIEX_USB_EP_CMD_EVENT,
 203                                                    cmd_node->cmd_skb, NULL);
 204                 skb_pull(cmd_node->cmd_skb, MWIFIEX_TYPE_LEN);
 205                 if (ret == -EBUSY)
 206                         cmd_node->cmd_skb = NULL;
 207         } else {
 208                 skb_push(cmd_node->cmd_skb, INTF_HEADER_LEN);
 209                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_CMD,
 210                                                    cmd_node->cmd_skb, NULL);
 211                 skb_pull(cmd_node->cmd_skb, INTF_HEADER_LEN);
 212         }
 213
 214         if (ret == -1) {
 215                 dev_err(adapter->dev, "DNLD_CMD: host to card failed\n");
 216                 if (adapter->iface_type == MWIFIEX_USB)
 217                         adapter->cmd_sent = false;
 218                 if (cmd_node->wait_q_enabled)
 219                         adapter->cmd_wait_q.status = -1;
 220                 mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);
 221
 222                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
 223                 adapter->curr_cmd = NULL;
 224                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
 225
 226                 adapter->dbg.num_cmd_host_to_card_failure++;
 227                 return -1;
 228         }
 229
 230         /* Save the last command id and action to debug log */
 231         adapter->dbg.last_cmd_index =
 232                         (adapter->dbg.last_cmd_index + 1) % DBG_CMD_NUM;
 233         adapter->dbg.last_cmd_id[adapter->dbg.last_cmd_index] = cmd_code;
 234         adapter->dbg.last_cmd_act[adapter->dbg.last_cmd_index] =
 235                         le16_to_cpu(*(__le16 *) ((u8 *) host_cmd + S_DS_GEN));
 236
 237         /* Clear BSS_NO_BITS from HostCmd */
 238         cmd_code &= HostCmd_CMD_ID_MASK;
 239
 240         /* Setup the timer after transmit command */
 241         mod_timer(&adapter->cmd_timer,
 242                   jiffies + (MWIFIEX_TIMER_10S * HZ) / 1000);
 243
 244         return 0;
 245 }
 246
 247 /*
 248  * This function downloads a sleep confirm command to the firmware.
 249  *
 250  * The function performs sanity tests, sets the command sequence
 251  * number and size, converts the header fields to CPU format before
 252  * sending.
 253  *
 254  * No responses are needed for sleep confirm command.
 255  */
 256 static int mwifiex_dnld_sleep_confirm_cmd(struct mwifiex_adapter *adapter)
 257 {
 258         int ret;
 259         struct mwifiex_private *priv;
 260         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf =
 261                                 (struct mwifiex_opt_sleep_confirm *)
 262                                                 adapter->sleep_cfm->data;
 263         struct sk_buff *sleep_cfm_tmp;
 264         __le32 tmp;
 265
 266         priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 267
 268         sleep_cfm_buf->seq_num =
 269                 cpu_to_le16((HostCmd_SET_SEQ_NO_BSS_INFO
 270                                         (adapter->seq_num, priv->bss_num,
 271                                          priv->bss_type)));
 272         adapter->seq_num++;
 273
 274         if (adapter->iface_type == MWIFIEX_USB) {
 275                 sleep_cfm_tmp =
 276                         dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 277                                       + MWIFIEX_TYPE_LEN);
 278                 skb_put(sleep_cfm_tmp, sizeof(struct mwifiex_opt_sleep_confirm)
 279                         + MWIFIEX_TYPE_LEN);
 280                 tmp = cpu_to_le32(MWIFIEX_USB_TYPE_CMD);
 281                 memcpy(sleep_cfm_tmp->data, &tmp, MWIFIEX_TYPE_LEN);
 282                 memcpy(sleep_cfm_tmp->data + MWIFIEX_TYPE_LEN,
 283                        adapter->sleep_cfm->data,
 284                        sizeof(struct mwifiex_opt_sleep_confirm));
 285                 ret = adapter->if_ops.host_to_card(adapter,
 286                                                    MWIFIEX_USB_EP_CMD_EVENT,
 287                                                    sleep_cfm_tmp, NULL);
 288                 if (ret != -EBUSY)
 289                         dev_kfree_skb_any(sleep_cfm_tmp);
 290         } else {
 291                 skb_push(adapter->sleep_cfm, INTF_HEADER_LEN);
 292                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_CMD,
 293                                                    adapter->sleep_cfm, NULL);
 294                 skb_pull(adapter->sleep_cfm, INTF_HEADER_LEN);
 295         }
 296
 297         if (ret == -1) {
 298                 dev_err(adapter->dev, "SLEEP_CFM: failed\n");
 299                 adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure++;
 300                 return -1;
 301         }
 302         if (GET_BSS_ROLE(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY))
 303             == MWIFIEX_BSS_ROLE_STA) {
 304                 if (!sleep_cfm_buf->resp_ctrl)
 305                         /* Response is not needed for sleep
 306                            confirm command */
 307                         adapter->ps_state = PS_STATE_SLEEP;
 308                 else
 309                         adapter->ps_state = PS_STATE_SLEEP_CFM;
 310
 311                 if (!sleep_cfm_buf->resp_ctrl &&
 312                     (adapter->is_hs_configured &&
 313                      !adapter->sleep_period.period)) {
 314                         adapter->pm_wakeup_card_req = true;
 315                         mwifiex_hs_activated_event(mwifiex_get_priv
 316                                         (adapter, MWIFIEX_BSS_ROLE_STA), true);
 317                 }
 318         }
 319
 320         return ret;
 321 }
 322
 323 /*
 324  * This function allocates the command buffers and links them to
 325  * the command free queue.
 326  *
 327  * The driver uses a pre allocated number of command buffers, which
 328  * are created at driver initializations and freed at driver cleanup.
 329  * Every command needs to obtain a command buffer from this pool before
 330  * it can be issued. The command free queue lists the command buffers
 331  * currently free to use, while the command pending queue lists the
 332  * command buffers already in use and awaiting handling. Command buffers
 333  * are returned to the free queue after use.
 334  */
 335 int mwifiex_alloc_cmd_buffer(struct mwifiex_adapter *adapter)
 336 {
 337         struct cmd_ctrl_node *cmd_array;
 338         u32 i;
 339
 340         /* Allocate and initialize struct cmd_ctrl_node */
 341         cmd_array = kcalloc(MWIFIEX_NUM_OF_CMD_BUFFER,
 342                             sizeof(struct cmd_ctrl_node), GFP_KERNEL);
 343         if (!cmd_array)
 344                 return -ENOMEM;
 345
 346         adapter->cmd_pool = cmd_array;
 347
 348         /* Allocate and initialize command buffers */
 349         for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++) {
 350                 cmd_array[i].skb = dev_alloc_skb(MWIFIEX_SIZE_OF_CMD_BUFFER);
 351                 if (!cmd_array[i].skb) {
 352                         dev_err(adapter->dev, "ALLOC_CMD_BUF: out of memory\n");
 353                         return -1;
 354                 }
 355         }
 356
 357         for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++)
 358                 mwifiex_insert_cmd_to_free_q(adapter, &cmd_array[i]);
 359
 360         return 0;
 361 }
 362
 363 /*
 364  * This function frees the command buffers.
 365  *
 366  * The function calls the completion callback for all the command
 367  * buffers that still have response buffers associated with them.
 368  */
 369 int mwifiex_free_cmd_buffer(struct mwifiex_adapter *adapter)
 370 {
 371         struct cmd_ctrl_node *cmd_array;
 372         u32 i;
 373
 374         /* Need to check if cmd pool is allocated or not */
 375         if (!adapter->cmd_pool) {
 376                 dev_dbg(adapter->dev, "info: FREE_CMD_BUF: cmd_pool is null\n");
 377                 return 0;
 378         }
 379
 380         cmd_array = adapter->cmd_pool;
 381
 382         /* Release shared memory buffers */
 383         for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++) {
 384                 if (cmd_array[i].skb) {
 385                         dev_dbg(adapter->dev, "cmd: free cmd buffer %d\n", i);
 386                         dev_kfree_skb_any(cmd_array[i].skb);
 387                 }
 388                 if (!cmd_array[i].resp_skb)
 389                         continue;
 390
 391                 if (adapter->iface_type == MWIFIEX_USB)
 392                         adapter->if_ops.cmdrsp_complete(adapter,
 393                                                         cmd_array[i].resp_skb);
 394                 else
 395                         dev_kfree_skb_any(cmd_array[i].resp_skb);
 396         }
 397         /* Release struct cmd_ctrl_node */
 398         if (adapter->cmd_pool) {
 399                 dev_dbg(adapter->dev, "cmd: free cmd pool\n");
 400                 kfree(adapter->cmd_pool);
 401                 adapter->cmd_pool = NULL;
 402         }
 403
 404         return 0;
 405 }
 406
 407 /*
 408  * This function handles events generated by firmware.
 409  *
 410  * Event body of events received from firmware are not used (though they are
 411  * saved), only the event ID is used. Some events are re-invoked by
 412  * the driver, with a new event body.
 413  *
 414  * After processing, the function calls the completion callback
 415  * for cleanup.
 416  */
 417 int mwifiex_process_event(struct mwifiex_adapter *adapter)
 418 {
 419         int ret;
 420         struct mwifiex_private *priv =
 421                 mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 422         struct sk_buff *skb = adapter->event_skb;
 423         u32 eventcause = adapter->event_cause;
 424         struct timeval tstamp;
 425         struct mwifiex_rxinfo *rx_info;
 426
 427         /* Save the last event to debug log */
 428         adapter->dbg.last_event_index =
 429                         (adapter->dbg.last_event_index + 1) % DBG_CMD_NUM;
 430         adapter->dbg.last_event[adapter->dbg.last_event_index] =
 431                                                         (u16) eventcause;
 432
 433         /* Get BSS number and corresponding priv */
 434         priv = mwifiex_get_priv_by_id(adapter, EVENT_GET_BSS_NUM(eventcause),
 435                                       EVENT_GET_BSS_TYPE(eventcause));
 436         if (!priv)
 437                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 438         /* Clear BSS_NO_BITS from event */
 439         eventcause &= EVENT_ID_MASK;
 440         adapter->event_cause = eventcause;
 441
 442         if (skb) {
 443                 rx_info = MWIFIEX_SKB_RXCB(skb);
 444                 rx_info->bss_num = priv->bss_num;
 445                 rx_info->bss_type = priv->bss_type;
 446         }
 447
 448         if (eventcause != EVENT_PS_SLEEP && eventcause != EVENT_PS_AWAKE) {
 449                 do_gettimeofday(&tstamp);
 450                 dev_dbg(adapter->dev, "event: %lu.%lu: cause: %#x\n",
 451                         tstamp.tv_sec, tstamp.tv_usec, eventcause);
 452         } else {
 453                 /* Handle PS_SLEEP/AWAKE events on STA */
 454                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA);
 455                 if (!priv)
 456                         priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 457         }
 458
 459         if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
 460                 ret = mwifiex_process_uap_event(priv);
 461         else
 462                 ret = mwifiex_process_sta_event(priv);
 463
 464         adapter->event_cause = 0;
 465         adapter->event_skb = NULL;
 466         adapter->if_ops.event_complete(adapter, skb);
 467
 468         return ret;
 469 }
 470
 471 /*
 472  * This function is used to send synchronous command to the firmware.
 473  *
 474  * it allocates a wait queue for the command and wait for the command
 475  * response.
 476  */
 477 int mwifiex_send_cmd_sync(struct mwifiex_private *priv, uint16_t cmd_no,
 478                           u16 cmd_action, u32 cmd_oid, void *data_buf)
 479 {
 480         int ret = 0;
 481         struct mwifiex_adapter *adapter = priv->adapter;
 482
 483         adapter->cmd_wait_q_required = true;
 484
 485         ret = mwifiex_send_cmd_async(priv, cmd_no, cmd_action, cmd_oid,
 486                                      data_buf);
 487
 488         return ret;
 489 }
 490
 491
 492 /*
 493  * This function prepares a command and asynchronously send it to the firmware.
 494  *
 495  * Preparation includes -
 496  *      - Sanity tests to make sure the card is still present or the FW
 497  *        is not reset
 498  *      - Getting a new command node from the command free queue
 499  *      - Initializing the command node for default parameters
 500  *      - Fill up the non-default parameters and buffer pointers
 501  *      - Add the command to pending queue
 502  */
 503 int mwifiex_send_cmd_async(struct mwifiex_private *priv, uint16_t cmd_no,
 504                            u16 cmd_action, u32 cmd_oid, void *data_buf)
 505 {
 506         int ret;
 507         struct mwifiex_adapter *adapter = priv->adapter;
 508         struct cmd_ctrl_node *cmd_node;
 509         struct host_cmd_ds_command *cmd_ptr;
 510
 511         if (!adapter) {
 512                 pr_err("PREP_CMD: adapter is NULL\n");
 513                 return -1;
 514         }
 515
 516         if (adapter->is_suspended) {
 517                 dev_err(adapter->dev, "PREP_CMD: device in suspended state\n");
 518                 return -1;
 519         }
 520
 521         if (adapter->surprise_removed) {
 522                 dev_err(adapter->dev, "PREP_CMD: card is removed\n");
 523                 return -1;
 524         }
 525
 526         if (adapter->hw_status == MWIFIEX_HW_STATUS_RESET) {
 527                 if (cmd_no != HostCmd_CMD_FUNC_INIT) {
 528                         dev_err(adapter->dev, "PREP_CMD: FW in reset state\n");
 529                         return -1;
 530                 }
 531         }
 532
 533         /* Get a new command node */
 534         cmd_node = mwifiex_get_cmd_node(adapter);
 535
 536         if (!cmd_node) {
 537                 dev_err(adapter->dev, "PREP_CMD: no free cmd node\n");
 538                 return -1;
 539         }
 540
 541         /* Initialize the command node */
 542         mwifiex_init_cmd_node(priv, cmd_node, cmd_oid, data_buf);
 543
 544         if (!cmd_node->cmd_skb) {
 545                 dev_err(adapter->dev, "PREP_CMD: no free cmd buf\n");
 546                 return -1;
 547         }
 548
 549         memset(skb_put(cmd_node->cmd_skb, sizeof(struct host_cmd_ds_command)),
 550                0, sizeof(struct host_cmd_ds_command));
 551
 552         cmd_ptr = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
 553         cmd_ptr->command = cpu_to_le16(cmd_no);
 554         cmd_ptr->result = 0;
 555
 556         /* Prepare command */
 557         if (cmd_no) {
 558                 switch (cmd_no) {
 559                 case HostCmd_CMD_UAP_SYS_CONFIG:
 560                 case HostCmd_CMD_UAP_BSS_START:
 561                 case HostCmd_CMD_UAP_BSS_STOP:
 562                         ret = mwifiex_uap_prepare_cmd(priv, cmd_no, cmd_action,
 563                                                       cmd_oid, data_buf,
 564                                                       cmd_ptr);
 565                         break;
 566                 default:
 567                         ret = mwifiex_sta_prepare_cmd(priv, cmd_no, cmd_action,
 568                                                       cmd_oid, data_buf,
 569                                                       cmd_ptr);
 570                         break;
 571                 }
 572         } else {
 573                 ret = mwifiex_cmd_host_cmd(priv, cmd_ptr, data_buf);
 574                 cmd_node->cmd_flag |= CMD_F_HOSTCMD;
 575         }
 576
 577         /* Return error, since the command preparation failed */
 578         if (ret) {
 579                 dev_err(adapter->dev, "PREP_CMD: cmd %#x preparation failed\n",
 580                         cmd_no);
 581                 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
 582                 return -1;
 583         }
 584
 585         /* Send command */
 586         if (cmd_no == HostCmd_CMD_802_11_SCAN) {
 587                 mwifiex_queue_scan_cmd(priv, cmd_node);
 588         } else {
 589                 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
 590                 queue_work(adapter->workqueue, &adapter->main_work);
 591                 if (cmd_node->wait_q_enabled)
 592                         ret = mwifiex_wait_queue_complete(adapter, cmd_node);
 593         }
 594
 595         return ret;
 596 }
 597
 598 /*
 599  * This function returns a command to the command free queue.
 600  *
 601  * The function also calls the completion callback if required, before
 602  * cleaning the command node and re-inserting it into the free queue.
 603  */
 604 void
 605 mwifiex_insert_cmd_to_free_q(struct mwifiex_adapter *adapter,
 606                              struct cmd_ctrl_node *cmd_node)
 607 {
 608         unsigned long flags;
 609
 610         if (!cmd_node)
 611                 return;
 612
 613         if (cmd_node->wait_q_enabled)
 614                 mwifiex_complete_cmd(adapter, cmd_node);
 615         /* Clean the node */
 616         mwifiex_clean_cmd_node(adapter, cmd_node);
 617
 618         /* Insert node into cmd_free_q */
 619         spin_lock_irqsave(&adapter->cmd_free_q_lock, flags);
 620         list_add_tail(&cmd_node->list, &adapter->cmd_free_q);
 621         spin_unlock_irqrestore(&adapter->cmd_free_q_lock, flags);
 622 }
 623
 624 /*
 625  * This function queues a command to the command pending queue.
 626  *
 627  * This in effect adds the command to the command list to be executed.
 628  * Exit PS command is handled specially, by placing it always to the
 629  * front of the command queue.
 630  */
 631 void
 632 mwifiex_insert_cmd_to_pending_q(struct mwifiex_adapter *adapter,
 633                                 struct cmd_ctrl_node *cmd_node, u32 add_tail)
 634 {
 635         struct host_cmd_ds_command *host_cmd = NULL;
 636         u16 command;
 637         unsigned long flags;
 638
 639         host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
 640         if (!host_cmd) {
 641                 dev_err(adapter->dev, "QUEUE_CMD: host_cmd is NULL\n");
 642                 return;
 643         }
 644
 645         command = le16_to_cpu(host_cmd->command);
 646
 647         /* Exit_PS command needs to be queued in the header always. */
 648         if (command == HostCmd_CMD_802_11_PS_MODE_ENH) {
 649                 struct host_cmd_ds_802_11_ps_mode_enh *pm =
 650                                                 &host_cmd->params.psmode_enh;
 651                 if ((le16_to_cpu(pm->action) == DIS_PS) ||
 652                     (le16_to_cpu(pm->action) == DIS_AUTO_PS)) {
 653                         if (adapter->ps_state != PS_STATE_AWAKE)
 654                                 add_tail = false;
 655                 }
 656         }
 657
 658         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 659         if (add_tail)
 660                 list_add_tail(&cmd_node->list, &adapter->cmd_pending_q);
 661         else
 662                 list_add(&cmd_node->list, &adapter->cmd_pending_q);
 663         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 664
 665         dev_dbg(adapter->dev, "cmd: QUEUE_CMD: cmd=%#x is queued\n", command);
 666 }
 667
 668 /*
 669  * This function executes the next command in command pending queue.
 670  *
 671  * This function will fail if a command is already in processing stage,
 672  * otherwise it will dequeue the first command from the command pending
 673  * queue and send to the firmware.
 674  *
 675  * If the device is currently in host sleep mode, any commands, except the
 676  * host sleep configuration command will de-activate the host sleep. For PS
 677  * mode, the function will put the firmware back to sleep if applicable.
 678  */
 679 int mwifiex_exec_next_cmd(struct mwifiex_adapter *adapter)
 680 {
 681         struct mwifiex_private *priv;
 682         struct cmd_ctrl_node *cmd_node;
 683         int ret = 0;
 684         struct host_cmd_ds_command *host_cmd;
 685         unsigned long cmd_flags;
 686         unsigned long cmd_pending_q_flags;
 687
 688         /* Check if already in processing */
 689         if (adapter->curr_cmd) {
 690                 dev_err(adapter->dev, "EXEC_NEXT_CMD: cmd in processing\n");
 691                 return -1;
 692         }
 693
 694         spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
 695         /* Check if any command is pending */
 696         spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_pending_q_flags);
 697         if (list_empty(&adapter->cmd_pending_q)) {
 698                 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
 699                                        cmd_pending_q_flags);
 700                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
 701                 return 0;
 702         }
 703         cmd_node = list_first_entry(&adapter->cmd_pending_q,
 704                                     struct cmd_ctrl_node, list);
 705         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
 706                                cmd_pending_q_flags);
 707
 708         host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
 709         priv = cmd_node->priv;
 710
 711         if (adapter->ps_state != PS_STATE_AWAKE) {
 712                 dev_err(adapter->dev, "%s: cannot send cmd in sleep state,"
 713                                 " this should not happen\n", __func__);
 714                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
 715                 return ret;
 716         }
 717
 718         spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_pending_q_flags);
 719         list_del(&cmd_node->list);
 720         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
 721                                cmd_pending_q_flags);
 722
 723         spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
 724         ret = mwifiex_dnld_cmd_to_fw(priv, cmd_node);
 725         priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 726         /* Any command sent to the firmware when host is in sleep
 727          * mode should de-configure host sleep. We should skip the
 728          * host sleep configuration command itself though
 729          */
 730         if (priv && (host_cmd->command !=
 731              cpu_to_le16(HostCmd_CMD_802_11_HS_CFG_ENH))) {
 732                 if (adapter->hs_activated) {
 733                         adapter->is_hs_configured = false;
 734                         mwifiex_hs_activated_event(priv, false);
 735                 }
 736         }
 737
 738         return ret;
 739 }
 740
 741 /*
 742  * This function handles the command response.
 743  *
 744  * After processing, the function cleans the command node and puts
 745  * it back to the command free queue.
 746  */
 747 int mwifiex_process_cmdresp(struct mwifiex_adapter *adapter)
 748 {
 749         struct host_cmd_ds_command *resp;
 750         struct mwifiex_private *priv =
 751                 mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 752         int ret = 0;
 753         uint16_t orig_cmdresp_no;
 754         uint16_t cmdresp_no;
 755         uint16_t cmdresp_result;
 756         struct timeval tstamp;
 757         unsigned long flags;
 758
 759         /* Now we got response from FW, cancel the command timer */
 760         del_timer(&adapter->cmd_timer);
 761
 762         if (!adapter->curr_cmd || !adapter->curr_cmd->resp_skb) {
 763                 resp = (struct host_cmd_ds_command *) adapter->upld_buf;
 764                 dev_err(adapter->dev, "CMD_RESP: NULL curr_cmd, %#x\n",
 765                         le16_to_cpu(resp->command));
 766                 return -1;
 767         }
 768
 769         adapter->num_cmd_timeout = 0;
 770
 771         resp = (struct host_cmd_ds_command *) adapter->curr_cmd->resp_skb->data;
 772         if (adapter->curr_cmd->cmd_flag & CMD_F_CANCELED) {
 773                 dev_err(adapter->dev, "CMD_RESP: %#x been canceled\n",
 774                         le16_to_cpu(resp->command));
 775                 mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);
 776                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
 777                 adapter->curr_cmd = NULL;
 778                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
 779                 return -1;
 780         }
 781
 782         if (adapter->curr_cmd->cmd_flag & CMD_F_HOSTCMD) {
 783                 /* Copy original response back to response buffer */
 784                 struct mwifiex_ds_misc_cmd *hostcmd;
 785                 uint16_t size = le16_to_cpu(resp->size);
 786                 dev_dbg(adapter->dev, "info: host cmd resp size = %d\n", size);
 787                 size = min_t(u16, size, MWIFIEX_SIZE_OF_CMD_BUFFER);
 788                 if (adapter->curr_cmd->data_buf) {
 789                         hostcmd = adapter->curr_cmd->data_buf;
 790                         hostcmd->len = size;
 791                         memcpy(hostcmd->cmd, resp, size);
 792                 }
 793         }
 794         orig_cmdresp_no = le16_to_cpu(resp->command);
 795
 796         /* Get BSS number and corresponding priv */
 797         priv = mwifiex_get_priv_by_id(adapter,
 798                              HostCmd_GET_BSS_NO(le16_to_cpu(resp->seq_num)),
 799                              HostCmd_GET_BSS_TYPE(le16_to_cpu(resp->seq_num)));
 800         if (!priv)
 801                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 802         /* Clear RET_BIT from HostCmd */
 803         resp->command = cpu_to_le16(orig_cmdresp_no & HostCmd_CMD_ID_MASK);
 804
 805         cmdresp_no = le16_to_cpu(resp->command);
 806         cmdresp_result = le16_to_cpu(resp->result);
 807
 808         /* Save the last command response to debug log */
 809         adapter->dbg.last_cmd_resp_index =
 810                         (adapter->dbg.last_cmd_resp_index + 1) % DBG_CMD_NUM;
 811         adapter->dbg.last_cmd_resp_id[adapter->dbg.last_cmd_resp_index] =
 812                                                                 orig_cmdresp_no;
 813
 814         do_gettimeofday(&tstamp);
 815         dev_dbg(adapter->dev, "cmd: CMD_RESP: (%lu.%lu): 0x%x, result %d,"
 816                 " len %d, seqno 0x%x\n",
 817                tstamp.tv_sec, tstamp.tv_usec, orig_cmdresp_no, cmdresp_result,
 818                le16_to_cpu(resp->size), le16_to_cpu(resp->seq_num));
 819
 820         if (!(orig_cmdresp_no & HostCmd_RET_BIT)) {
 821                 dev_err(adapter->dev, "CMD_RESP: invalid cmd resp\n");
 822                 if (adapter->curr_cmd->wait_q_enabled)
 823                         adapter->cmd_wait_q.status = -1;
 824
 825                 mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);
 826                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
 827                 adapter->curr_cmd = NULL;
 828                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
 829                 return -1;
 830         }
 831
 832         if (adapter->curr_cmd->cmd_flag & CMD_F_HOSTCMD) {
 833                 adapter->curr_cmd->cmd_flag &= ~CMD_F_HOSTCMD;
 834                 if ((cmdresp_result == HostCmd_RESULT_OK) &&
 835                     (cmdresp_no == HostCmd_CMD_802_11_HS_CFG_ENH))
 836                         ret = mwifiex_ret_802_11_hs_cfg(priv, resp);
 837         } else {
 838                 /* handle response */
 839                 ret = mwifiex_process_sta_cmdresp(priv, cmdresp_no, resp);
 840         }
 841
 842         /* Check init command response */
 843         if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING) {
 844                 if (ret) {
 845                         dev_err(adapter->dev, "%s: cmd %#x failed during "
 846                                 "initialization\n", __func__, cmdresp_no);
 847                         mwifiex_init_fw_complete(adapter);
 848                         return -1;
 849                 } else if (adapter->last_init_cmd == cmdresp_no)
 850                         adapter->hw_status = MWIFIEX_HW_STATUS_INIT_DONE;
 851         }
 852
 853         if (adapter->curr_cmd) {
 854                 if (adapter->curr_cmd->wait_q_enabled)
 855                         adapter->cmd_wait_q.status = ret;
 856
 857                 /* Clean up and put current command back to cmd_free_q */
 858                 mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);
 859
 860                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
 861                 adapter->curr_cmd = NULL;
 862                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
 863         }
 864
 865         return ret;
 866 }
 867
 868 /*
 869  * This function handles the timeout of command sending.
 870  *
 871  * It will re-send the same command again.
 872  */
 873 void
 874 mwifiex_cmd_timeout_func(unsigned long function_context)
 875 {
 876         struct mwifiex_adapter *adapter =
 877                 (struct mwifiex_adapter *) function_context;
 878         struct cmd_ctrl_node *cmd_node;
 879         struct timeval tstamp;
 880
 881         adapter->num_cmd_timeout++;
 882         adapter->dbg.num_cmd_timeout++;
 883         if (!adapter->curr_cmd) {
 884                 dev_dbg(adapter->dev, "cmd: empty curr_cmd\n");
 885                 return;
 886         }
 887         cmd_node = adapter->curr_cmd;
 888         if (cmd_node) {
 889                 adapter->dbg.timeout_cmd_id =
 890                         adapter->dbg.last_cmd_id[adapter->dbg.last_cmd_index];
 891                 adapter->dbg.timeout_cmd_act =
 892                         adapter->dbg.last_cmd_act[adapter->dbg.last_cmd_index];
 893                 do_gettimeofday(&tstamp);
 894                 dev_err(adapter->dev,
 895                         "%s: Timeout cmd id (%lu.%lu) = %#x, act = %#x\n",
 896                         __func__, tstamp.tv_sec, tstamp.tv_usec,
 897                         adapter->dbg.timeout_cmd_id,
 898                         adapter->dbg.timeout_cmd_act);
 899
 900                 dev_err(adapter->dev, "num_data_h2c_failure = %d\n",
 901                         adapter->dbg.num_tx_host_to_card_failure);
 902                 dev_err(adapter->dev, "num_cmd_h2c_failure = %d\n",
 903                         adapter->dbg.num_cmd_host_to_card_failure);
 904
 905                 dev_err(adapter->dev, "num_cmd_timeout = %d\n",
 906                         adapter->dbg.num_cmd_timeout);
 907                 dev_err(adapter->dev, "num_tx_timeout = %d\n",
 908                         adapter->dbg.num_tx_timeout);
 909
 910                 dev_err(adapter->dev, "last_cmd_index = %d\n",
 911                         adapter->dbg.last_cmd_index);
 912                 dev_err(adapter->dev, "last_cmd_id: %*ph\n",
 913                         (int)sizeof(adapter->dbg.last_cmd_id),
 914                         adapter->dbg.last_cmd_id);
 915                 dev_err(adapter->dev, "last_cmd_act: %*ph\n",
 916                         (int)sizeof(adapter->dbg.last_cmd_act),
 917                         adapter->dbg.last_cmd_act);
 918
 919                 dev_err(adapter->dev, "last_cmd_resp_index = %d\n",
 920                         adapter->dbg.last_cmd_resp_index);
 921                 dev_err(adapter->dev, "last_cmd_resp_id: %*ph\n",
 922                         (int)sizeof(adapter->dbg.last_cmd_resp_id),
 923                         adapter->dbg.last_cmd_resp_id);
 924
 925                 dev_err(adapter->dev, "last_event_index = %d\n",
 926                         adapter->dbg.last_event_index);
 927                 dev_err(adapter->dev, "last_event: %*ph\n",
 928                         (int)sizeof(adapter->dbg.last_event),
 929                         adapter->dbg.last_event);
 930
 931                 dev_err(adapter->dev, "data_sent=%d cmd_sent=%d\n",
 932                         adapter->data_sent, adapter->cmd_sent);
 933
 934                 dev_err(adapter->dev, "ps_mode=%d ps_state=%d\n",
 935                         adapter->ps_mode, adapter->ps_state);
 936
 937                 if (cmd_node->wait_q_enabled) {
 938                         adapter->cmd_wait_q.status = -ETIMEDOUT;
 939                         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 940                         mwifiex_cancel_pending_ioctl(adapter);
 941                         /* reset cmd_sent flag to unblock new commands */
 942                         adapter->cmd_sent = false;
 943                 }
 944         }
 945         if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING)
 946                 mwifiex_init_fw_complete(adapter);
 947
 948         if (adapter->if_ops.card_reset)
 949                 adapter->if_ops.card_reset(adapter);
 950 }
 951
 952 /*
 953  * This function cancels all the pending commands.
 954  *
 955  * The current command, all commands in command pending queue and all scan
 956  * commands in scan pending queue are cancelled. All the completion callbacks
 957  * are called with failure status to ensure cleanup.
 958  */
 959 void
 960 mwifiex_cancel_all_pending_cmd(struct mwifiex_adapter *adapter)
 961 {
 962         struct cmd_ctrl_node *cmd_node = NULL, *tmp_node;
 963         unsigned long flags;
 964
 965         /* Cancel current cmd */
 966         if ((adapter->curr_cmd) && (adapter->curr_cmd->wait_q_enabled)) {
 967                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
 968                 adapter->curr_cmd->wait_q_enabled = false;
 969                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
 970                 adapter->cmd_wait_q.status = -1;
 971                 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
 972         }
 973         /* Cancel all pending command */
 974         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 975         list_for_each_entry_safe(cmd_node, tmp_node,
 976                                  &adapter->cmd_pending_q, list) {
 977                 list_del(&cmd_node->list);
 978                 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 979
 980                 if (cmd_node->wait_q_enabled) {
 981                         adapter->cmd_wait_q.status = -1;
 982                         mwifiex_complete_cmd(adapter, cmd_node);
 983                         cmd_node->wait_q_enabled = false;
 984                 }
 985                 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
 986                 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 987         }
 988         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 989
 990         /* Cancel all pending scan command */
 991         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
 992         list_for_each_entry_safe(cmd_node, tmp_node,
 993                                  &adapter->scan_pending_q, list) {
 994                 list_del(&cmd_node->list);
 995                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
 996
 997                 cmd_node->wait_q_enabled = false;
 998                 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
 999                 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1000         }
1001         spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1002
1003         spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1004         adapter->scan_processing = false;
1005         spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1006 }
1007
1008 /*
1009  * This function cancels all pending commands that matches with
1010  * the given IOCTL request.
1011  *
1012  * Both the current command buffer and the pending command queue are
1013  * searched for matching IOCTL request. The completion callback of
1014  * the matched command is called with failure status to ensure cleanup.
1015  * In case of scan commands, all pending commands in scan pending queue
1016  * are cancelled.
1017  */
1018 void
1019 mwifiex_cancel_pending_ioctl(struct mwifiex_adapter *adapter)
1020 {
1021         struct cmd_ctrl_node *cmd_node = NULL, *tmp_node = NULL;
1022         unsigned long cmd_flags;
1023         unsigned long scan_pending_q_flags;
1024         uint16_t cancel_scan_cmd = false;
1025
1026         if ((adapter->curr_cmd) &&
1027             (adapter->curr_cmd->wait_q_enabled)) {
1028                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
1029                 cmd_node = adapter->curr_cmd;
1030                 cmd_node->wait_q_enabled = false;
1031                 cmd_node->cmd_flag |= CMD_F_CANCELED;
1032                 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
1033                 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1034                 adapter->curr_cmd = NULL;
1035                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
1036         }
1037
1038         /* Cancel all pending scan command */
1039         spin_lock_irqsave(&adapter->scan_pending_q_lock,
1040                           scan_pending_q_flags);
1041         list_for_each_entry_safe(cmd_node, tmp_node,
1042                                  &adapter->scan_pending_q, list) {
1043                 list_del(&cmd_node->list);
1044                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1045                                        scan_pending_q_flags);
1046                 cmd_node->wait_q_enabled = false;
1047                 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
1048                 spin_lock_irqsave(&adapter->scan_pending_q_lock,
1049                                   scan_pending_q_flags);
1050                 cancel_scan_cmd = true;
1051         }
1052         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1053                                scan_pending_q_flags);
1054
1055         if (cancel_scan_cmd) {
1056                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
1057                 adapter->scan_processing = false;
1058                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
1059         }
1060         adapter->cmd_wait_q.status = -1;
1061 }
1062
1063 /*
1064  * This function sends the sleep confirm command to firmware, if
1065  * possible.
1066  *
1067  * The sleep confirm command cannot be issued if command response,
1068  * data response or event response is awaiting handling, or if we
1069  * are in the middle of sending a command, or expecting a command
1070  * response.
1071  */
1072 void
1073 mwifiex_check_ps_cond(struct mwifiex_adapter *adapter)
1074 {
1075         if (!adapter->cmd_sent &&
1076             !adapter->curr_cmd && !IS_CARD_RX_RCVD(adapter))
1077                 mwifiex_dnld_sleep_confirm_cmd(adapter);
1078         else
1079                 dev_dbg(adapter->dev,
1080                         "cmd: Delay Sleep Confirm (%s%s%s)\n",
1081                         (adapter->cmd_sent) ? "D" : "",
1082                         (adapter->curr_cmd) ? "C" : "",
1083                         (IS_CARD_RX_RCVD(adapter)) ? "R" : "");
1084 }
1085
1086 /*
1087  * This function sends a Host Sleep activated event to applications.
1088  *
1089  * This event is generated by the driver, with a blank event body.
1090  */
1091 void
1092 mwifiex_hs_activated_event(struct mwifiex_private *priv, u8 activated)
1093 {
1094         if (activated) {
1095                 if (priv->adapter->is_hs_configured) {
1096                         priv->adapter->hs_activated = true;
1097                         mwifiex_update_rxreor_flags(priv->adapter,
1098                                                     RXREOR_FORCE_NO_DROP);
1099                         dev_dbg(priv->adapter->dev, "event: hs_activated\n");
1100                         priv->adapter->hs_activate_wait_q_woken = true;
1101                         wake_up_interruptible(
1102                                 &priv->adapter->hs_activate_wait_q);
1103                 } else {
1104                         dev_dbg(priv->adapter->dev, "event: HS not configured\n");
1105                 }
1106         } else {
1107                 dev_dbg(priv->adapter->dev, "event: hs_deactivated\n");
1108                 priv->adapter->hs_activated = false;
1109         }
1110 }
1111
1112 /*
1113  * This function handles the command response of a Host Sleep configuration
1114  * command.
1115  *
1116  * Handling includes changing the header fields into CPU format
1117  * and setting the current host sleep activation status in driver.
1118  *
1119  * In case host sleep status change, the function generates an event to
1120  * notify the applications.
1121  */
1122 int mwifiex_ret_802_11_hs_cfg(struct mwifiex_private *priv,
1123                               struct host_cmd_ds_command *resp)
1124 {
1125         struct mwifiex_adapter *adapter = priv->adapter;
1126         struct host_cmd_ds_802_11_hs_cfg_enh *phs_cfg =
1127                 &resp->params.opt_hs_cfg;
1128         uint32_t conditions = le32_to_cpu(phs_cfg->params.hs_config.conditions);
1129
1130         if (phs_cfg->action == cpu_to_le16(HS_ACTIVATE) &&
1131             adapter->iface_type == MWIFIEX_SDIO) {
1132                 mwifiex_hs_activated_event(priv, true);
1133                 return 0;
1134         } else {
1135                 dev_dbg(adapter->dev, "cmd: CMD_RESP: HS_CFG cmd reply"
1136                         " result=%#x, conditions=0x%x gpio=0x%x gap=0x%x\n",
1137                         resp->result, conditions,
1138                         phs_cfg->params.hs_config.gpio,
1139                         phs_cfg->params.hs_config.gap);
1140         }
1141         if (conditions != HOST_SLEEP_CFG_CANCEL) {
1142                 adapter->is_hs_configured = true;
1143                 if (adapter->iface_type == MWIFIEX_USB ||
1144                     adapter->iface_type == MWIFIEX_PCIE)
1145                         mwifiex_hs_activated_event(priv, true);
1146         } else {
1147                 adapter->is_hs_configured = false;
1148                 if (adapter->hs_activated)
1149                         mwifiex_hs_activated_event(priv, false);
1150         }
1151
1152         return 0;
1153 }
1154
1155 /*
1156  * This function wakes up the adapter and generates a Host Sleep
1157  * cancel event on receiving the power up interrupt.
1158  */
1159 void
1160 mwifiex_process_hs_config(struct mwifiex_adapter *adapter)
1161 {
1162         dev_dbg(adapter->dev, "info: %s: auto cancelling host sleep"
1163                 " since there is interrupt from the firmware\n", __func__);
1164
1165         adapter->if_ops.wakeup(adapter);
1166         adapter->hs_activated = false;
1167         adapter->is_hs_configured = false;
1168         mwifiex_hs_activated_event(mwifiex_get_priv(adapter,
1169                                                     MWIFIEX_BSS_ROLE_ANY),
1170                                    false);
1171 }
1172 EXPORT_SYMBOL_GPL(mwifiex_process_hs_config);
1173
1174 /*
1175  * This function handles the command response of a sleep confirm command.
1176  *
1177  * The function sets the card state to SLEEP if the response indicates success.
1178  */
1179 void
1180 mwifiex_process_sleep_confirm_resp(struct mwifiex_adapter *adapter,
1181                                    u8 *pbuf, u32 upld_len)
1182 {
1183         struct host_cmd_ds_command *cmd = (struct host_cmd_ds_command *) pbuf;
1184         struct mwifiex_private *priv =
1185                 mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1186         uint16_t result = le16_to_cpu(cmd->result);
1187         uint16_t command = le16_to_cpu(cmd->command);
1188         uint16_t seq_num = le16_to_cpu(cmd->seq_num);
1189
1190         if (!upld_len) {
1191                 dev_err(adapter->dev, "%s: cmd size is 0\n", __func__);
1192                 return;
1193         }
1194
1195         /* Get BSS number and corresponding priv */
1196         priv = mwifiex_get_priv_by_id(adapter, HostCmd_GET_BSS_NO(seq_num),
1197                                       HostCmd_GET_BSS_TYPE(seq_num));
1198         if (!priv)
1199                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1200
1201         /* Update sequence number */
1202         seq_num = HostCmd_GET_SEQ_NO(seq_num);
1203         /* Clear RET_BIT from HostCmd */
1204         command &= HostCmd_CMD_ID_MASK;
1205
1206         if (command != HostCmd_CMD_802_11_PS_MODE_ENH) {
1207                 dev_err(adapter->dev,
1208                         "%s: rcvd unexpected resp for cmd %#x, result = %x\n",
1209                         __func__, command, result);
1210                 return;
1211         }
1212
1213         if (result) {
1214                 dev_err(adapter->dev, "%s: sleep confirm cmd failed\n",
1215                         __func__);
1216                 adapter->pm_wakeup_card_req = false;
1217                 adapter->ps_state = PS_STATE_AWAKE;
1218                 return;
1219         }
1220         adapter->pm_wakeup_card_req = true;
1221         if (adapter->is_hs_configured)
1222                 mwifiex_hs_activated_event(mwifiex_get_priv
1223                                                 (adapter, MWIFIEX_BSS_ROLE_ANY),
1224                                            true);
1225         adapter->ps_state = PS_STATE_SLEEP;
1226         cmd->command = cpu_to_le16(command);
1227         cmd->seq_num = cpu_to_le16(seq_num);
1228 }
1229 EXPORT_SYMBOL_GPL(mwifiex_process_sleep_confirm_resp);
1230
1231 /*
1232  * This function prepares an enhanced power mode command.
1233  *
1234  * This function can be used to disable power save or to configure
1235  * power save with auto PS or STA PS or auto deep sleep.
1236  *
1237  * Preparation includes -
1238  *      - Setting command ID, action and proper size
1239  *      - Setting Power Save bitmap, PS parameters TLV, PS mode TLV,
1240  *        auto deep sleep TLV (as required)
1241  *      - Ensuring correct endian-ness
1242  */
1243 int mwifiex_cmd_enh_power_mode(struct mwifiex_private *priv,
1244                                struct host_cmd_ds_command *cmd,
1245                                u16 cmd_action, uint16_t ps_bitmap,
1246                                struct mwifiex_ds_auto_ds *auto_ds)
1247 {
1248         struct host_cmd_ds_802_11_ps_mode_enh *psmode_enh =
1249                 &cmd->params.psmode_enh;
1250         u8 *tlv;
1251         u16 cmd_size = 0;
1252
1253         cmd->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
1254         if (cmd_action == DIS_AUTO_PS) {
1255                 psmode_enh->action = cpu_to_le16(DIS_AUTO_PS);
1256                 psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
1257                 cmd->size = cpu_to_le16(S_DS_GEN + sizeof(psmode_enh->action) +
1258                                         sizeof(psmode_enh->params.ps_bitmap));
1259         } else if (cmd_action == GET_PS) {
1260                 psmode_enh->action = cpu_to_le16(GET_PS);
1261                 psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
1262                 cmd->size = cpu_to_le16(S_DS_GEN + sizeof(psmode_enh->action) +
1263                                         sizeof(psmode_enh->params.ps_bitmap));
1264         } else if (cmd_action == EN_AUTO_PS) {
1265                 psmode_enh->action = cpu_to_le16(EN_AUTO_PS);
1266                 psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
1267                 cmd_size = S_DS_GEN + sizeof(psmode_enh->action) +
1268                                         sizeof(psmode_enh->params.ps_bitmap);
1269                 tlv = (u8 *) cmd + cmd_size;
1270                 if (ps_bitmap & BITMAP_STA_PS) {
1271                         struct mwifiex_adapter *adapter = priv->adapter;
1272                         struct mwifiex_ie_types_ps_param *ps_tlv =
1273                                 (struct mwifiex_ie_types_ps_param *) tlv;
1274                         struct mwifiex_ps_param *ps_mode = &ps_tlv->param;
1275                         ps_tlv->header.type = cpu_to_le16(TLV_TYPE_PS_PARAM);
1276                         ps_tlv->header.len = cpu_to_le16(sizeof(*ps_tlv) -
1277                                         sizeof(struct mwifiex_ie_types_header));
1278                         cmd_size += sizeof(*ps_tlv);
1279                         tlv += sizeof(*ps_tlv);
1280                         dev_dbg(adapter->dev, "cmd: PS Command: Enter PS\n");
1281                         ps_mode->null_pkt_interval =
1282                                         cpu_to_le16(adapter->null_pkt_interval);
1283                         ps_mode->multiple_dtims =
1284                                         cpu_to_le16(adapter->multiple_dtim);
1285                         ps_mode->bcn_miss_timeout =
1286                                         cpu_to_le16(adapter->bcn_miss_time_out);
1287                         ps_mode->local_listen_interval =
1288                                 cpu_to_le16(adapter->local_listen_interval);
1289                         ps_mode->adhoc_wake_period =
1290                                 cpu_to_le16(adapter->adhoc_awake_period);
1291                         ps_mode->delay_to_ps =
1292                                         cpu_to_le16(adapter->delay_to_ps);
1293                         ps_mode->mode = cpu_to_le16(adapter->enhanced_ps_mode);
1294
1295                 }
1296                 if (ps_bitmap & BITMAP_AUTO_DS) {
1297                         struct mwifiex_ie_types_auto_ds_param *auto_ds_tlv =
1298                                 (struct mwifiex_ie_types_auto_ds_param *) tlv;
1299                         u16 idletime = 0;
1300
1301                         auto_ds_tlv->header.type =
1302                                 cpu_to_le16(TLV_TYPE_AUTO_DS_PARAM);
1303                         auto_ds_tlv->header.len =
1304                                 cpu_to_le16(sizeof(*auto_ds_tlv) -
1305                                         sizeof(struct mwifiex_ie_types_header));
1306                         cmd_size += sizeof(*auto_ds_tlv);
1307                         tlv += sizeof(*auto_ds_tlv);
1308                         if (auto_ds)
1309                                 idletime = auto_ds->idle_time;
1310                         dev_dbg(priv->adapter->dev,
1311                                 "cmd: PS Command: Enter Auto Deep Sleep\n");
1312                         auto_ds_tlv->deep_sleep_timeout = cpu_to_le16(idletime);
1313                 }
1314                 cmd->size = cpu_to_le16(cmd_size);
1315         }
1316         return 0;
1317 }
1318
1319 /*
1320  * This function handles the command response of an enhanced power mode
1321  * command.
1322  *
1323  * Handling includes changing the header fields into CPU format
1324  * and setting the current enhanced power mode in driver.
1325  */
1326 int mwifiex_ret_enh_power_mode(struct mwifiex_private *priv,
1327                                struct host_cmd_ds_command *resp,
1328                                struct mwifiex_ds_pm_cfg *pm_cfg)
1329 {
1330         struct mwifiex_adapter *adapter = priv->adapter;
1331         struct host_cmd_ds_802_11_ps_mode_enh *ps_mode =
1332                 &resp->params.psmode_enh;
1333         uint16_t action = le16_to_cpu(ps_mode->action);
1334         uint16_t ps_bitmap = le16_to_cpu(ps_mode->params.ps_bitmap);
1335         uint16_t auto_ps_bitmap =
1336                 le16_to_cpu(ps_mode->params.ps_bitmap);
1337
1338         dev_dbg(adapter->dev,
1339                 "info: %s: PS_MODE cmd reply result=%#x action=%#X\n",
1340                 __func__, resp->result, action);
1341         if (action == EN_AUTO_PS) {
1342                 if (auto_ps_bitmap & BITMAP_AUTO_DS) {
1343                         dev_dbg(adapter->dev, "cmd: Enabled auto deep sleep\n");
1344                         priv->adapter->is_deep_sleep = true;
1345                 }
1346                 if (auto_ps_bitmap & BITMAP_STA_PS) {
1347                         dev_dbg(adapter->dev, "cmd: Enabled STA power save\n");
1348                         if (adapter->sleep_period.period)
1349                                 dev_dbg(adapter->dev,
1350                                         "cmd: set to uapsd/pps mode\n");
1351                 }
1352         } else if (action == DIS_AUTO_PS) {
1353                 if (ps_bitmap & BITMAP_AUTO_DS) {
1354                         priv->adapter->is_deep_sleep = false;
1355                         dev_dbg(adapter->dev, "cmd: Disabled auto deep sleep\n");
1356                 }
1357                 if (ps_bitmap & BITMAP_STA_PS) {
1358                         dev_dbg(adapter->dev, "cmd: Disabled STA power save\n");
1359                         if (adapter->sleep_period.period) {
1360                                 adapter->delay_null_pkt = false;
1361                                 adapter->tx_lock_flag = false;
1362                                 adapter->pps_uapsd_mode = false;
1363                         }
1364                 }
1365         } else if (action == GET_PS) {
1366                 if (ps_bitmap & BITMAP_STA_PS)
1367                         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_PSP;
1368                 else
1369                         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
1370
1371                 dev_dbg(adapter->dev, "cmd: ps_bitmap=%#x\n", ps_bitmap);
1372
1373                 if (pm_cfg) {
1374                         /* This section is for get power save mode */
1375                         if (ps_bitmap & BITMAP_STA_PS)
1376                                 pm_cfg->param.ps_mode = 1;
1377                         else
1378                                 pm_cfg->param.ps_mode = 0;
1379                 }
1380         }
1381         return 0;
1382 }
1383
1384 /*
1385  * This function prepares command to get hardware specifications.
1386  *
1387  * Preparation includes -
1388  *      - Setting command ID, action and proper size
1389  *      - Setting permanent address parameter
1390  *      - Ensuring correct endian-ness
1391  */
1392 int mwifiex_cmd_get_hw_spec(struct mwifiex_private *priv,
1393                             struct host_cmd_ds_command *cmd)
1394 {
1395         struct host_cmd_ds_get_hw_spec *hw_spec = &cmd->params.hw_spec;
1396
1397         cmd->command = cpu_to_le16(HostCmd_CMD_GET_HW_SPEC);
1398         cmd->size =
1399                 cpu_to_le16(sizeof(struct host_cmd_ds_get_hw_spec) + S_DS_GEN);
1400         memcpy(hw_spec->permanent_addr, priv->curr_addr, ETH_ALEN);
1401
1402         return 0;
1403 }
1404
1405 /*
1406  * This function handles the command response of get hardware
1407  * specifications.
1408  *
1409  * Handling includes changing the header fields into CPU format
1410  * and saving/updating the following parameters in driver -
1411  *      - Firmware capability information
1412  *      - Firmware band settings
1413  *      - Ad-hoc start band and channel
1414  *      - Ad-hoc 11n activation status
1415  *      - Firmware release number
1416  *      - Number of antennas
1417  *      - Hardware address
1418  *      - Hardware interface version
1419  *      - Firmware version
1420  *      - Region code
1421  *      - 11n capabilities
1422  *      - MCS support fields
1423  *      - MP end port
1424  */
1425 int mwifiex_ret_get_hw_spec(struct mwifiex_private *priv,
1426                             struct host_cmd_ds_command *resp)
1427 {
1428         struct host_cmd_ds_get_hw_spec *hw_spec = &resp->params.hw_spec;
1429         struct mwifiex_adapter *adapter = priv->adapter;
1430         int i;
1431
1432         adapter->fw_cap_info = le32_to_cpu(hw_spec->fw_cap_info);
1433
1434         if (IS_SUPPORT_MULTI_BANDS(adapter))
1435                 adapter->fw_bands = (u8) GET_FW_DEFAULT_BANDS(adapter);
1436         else
1437                 adapter->fw_bands = BAND_B;
1438
1439         adapter->config_bands = adapter->fw_bands;
1440
1441         if (adapter->fw_bands & BAND_A) {
1442                 if (adapter->fw_bands & BAND_GN) {
1443                         adapter->config_bands |= BAND_AN;
1444                         adapter->fw_bands |= BAND_AN;
1445                 }
1446                 if (adapter->fw_bands & BAND_AN) {
1447                         adapter->adhoc_start_band = BAND_A | BAND_AN;
1448                         adapter->adhoc_11n_enabled = true;
1449                 } else {
1450                         adapter->adhoc_start_band = BAND_A;
1451                 }
1452                 priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL_A;
1453         } else if (adapter->fw_bands & BAND_GN) {
1454                 adapter->adhoc_start_band = BAND_G | BAND_B | BAND_GN;
1455                 priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
1456                 adapter->adhoc_11n_enabled = true;
1457         } else if (adapter->fw_bands & BAND_G) {
1458                 adapter->adhoc_start_band = BAND_G | BAND_B;
1459                 priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
1460         } else if (adapter->fw_bands & BAND_B) {
1461                 adapter->adhoc_start_band = BAND_B;
1462                 priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
1463         }
1464
1465         adapter->fw_release_number = le32_to_cpu(hw_spec->fw_release_number);
1466         adapter->number_of_antenna = le16_to_cpu(hw_spec->number_of_antenna);
1467
1468         if (le32_to_cpu(hw_spec->dot_11ac_dev_cap)) {
1469                 adapter->is_hw_11ac_capable = true;
1470
1471                 /* Copy 11AC cap */
1472                 adapter->hw_dot_11ac_dev_cap =
1473                                         le32_to_cpu(hw_spec->dot_11ac_dev_cap);
1474                 adapter->usr_dot_11ac_dev_cap_bg = adapter->hw_dot_11ac_dev_cap;
1475                 adapter->usr_dot_11ac_dev_cap_a = adapter->hw_dot_11ac_dev_cap;
1476
1477                 /* Copy 11AC mcs */
1478                 adapter->hw_dot_11ac_mcs_support =
1479                                 le32_to_cpu(hw_spec->dot_11ac_mcs_support);
1480                 adapter->usr_dot_11ac_mcs_support =
1481                                         adapter->hw_dot_11ac_mcs_support;
1482         } else {
1483                 adapter->is_hw_11ac_capable = false;
1484         }
1485
1486         dev_dbg(adapter->dev, "info: GET_HW_SPEC: fw_release_number- %#x\n",
1487                 adapter->fw_release_number);
1488         dev_dbg(adapter->dev, "info: GET_HW_SPEC: permanent addr: %pM\n",
1489                 hw_spec->permanent_addr);
1490         dev_dbg(adapter->dev,
1491                 "info: GET_HW_SPEC: hw_if_version=%#x version=%#x\n",
1492                 le16_to_cpu(hw_spec->hw_if_version),
1493                 le16_to_cpu(hw_spec->version));
1494
1495         if (priv->curr_addr[0] == 0xff)
1496                 memmove(priv->curr_addr, hw_spec->permanent_addr, ETH_ALEN);
1497
1498         adapter->region_code = le16_to_cpu(hw_spec->region_code);
1499
1500         for (i = 0; i < MWIFIEX_MAX_REGION_CODE; i++)
1501                 /* Use the region code to search for the index */
1502                 if (adapter->region_code == region_code_index[i])
1503                         break;
1504
1505         /* If it's unidentified region code, use the default (USA) */
1506         if (i >= MWIFIEX_MAX_REGION_CODE) {
1507                 adapter->region_code = 0x10;
1508                 dev_dbg(adapter->dev,
1509                         "cmd: unknown region code, use default (USA)\n");
1510         }
1511
1512         adapter->hw_dot_11n_dev_cap = le32_to_cpu(hw_spec->dot_11n_dev_cap);
1513         adapter->hw_dev_mcs_support = hw_spec->dev_mcs_support;
1514
1515         if (adapter->if_ops.update_mp_end_port)
1516                 adapter->if_ops.update_mp_end_port(adapter,
1517                                         le16_to_cpu(hw_spec->mp_end_port));
1518
1519         return 0;
1520 }