drivers/net/wireless/marvell/mwifiex/util.c

   1 /*
   2  * Marvell Wireless LAN device driver: utility functions
   3  *
   4  * Copyright (C) 2011-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 static struct mwifiex_debug_data items[] = {
  29         {"debug_mask", item_size(debug_mask),
  30          item_addr(debug_mask), 1},
  31         {"int_counter", item_size(int_counter),
  32          item_addr(int_counter), 1},
  33         {"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]),
  34          item_addr(packets_out[WMM_AC_VO]), 1},
  35         {"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]),
  36          item_addr(packets_out[WMM_AC_VI]), 1},
  37         {"wmm_ac_be", item_size(packets_out[WMM_AC_BE]),
  38          item_addr(packets_out[WMM_AC_BE]), 1},
  39         {"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]),
  40          item_addr(packets_out[WMM_AC_BK]), 1},
  41         {"tx_buf_size", item_size(tx_buf_size),
  42          item_addr(tx_buf_size), 1},
  43         {"curr_tx_buf_size", item_size(curr_tx_buf_size),
  44          item_addr(curr_tx_buf_size), 1},
  45         {"ps_mode", item_size(ps_mode),
  46          item_addr(ps_mode), 1},
  47         {"ps_state", item_size(ps_state),
  48          item_addr(ps_state), 1},
  49         {"is_deep_sleep", item_size(is_deep_sleep),
  50          item_addr(is_deep_sleep), 1},
  51         {"wakeup_dev_req", item_size(pm_wakeup_card_req),
  52          item_addr(pm_wakeup_card_req), 1},
  53         {"wakeup_tries", item_size(pm_wakeup_fw_try),
  54          item_addr(pm_wakeup_fw_try), 1},
  55         {"hs_configured", item_size(is_hs_configured),
  56          item_addr(is_hs_configured), 1},
  57         {"hs_activated", item_size(hs_activated),
  58          item_addr(hs_activated), 1},
  59         {"num_tx_timeout", item_size(num_tx_timeout),
  60          item_addr(num_tx_timeout), 1},
  61         {"is_cmd_timedout", item_size(is_cmd_timedout),
  62          item_addr(is_cmd_timedout), 1},
  63         {"timeout_cmd_id", item_size(timeout_cmd_id),
  64          item_addr(timeout_cmd_id), 1},
  65         {"timeout_cmd_act", item_size(timeout_cmd_act),
  66          item_addr(timeout_cmd_act), 1},
  67         {"last_cmd_id", item_size(last_cmd_id),
  68          item_addr(last_cmd_id), DBG_CMD_NUM},
  69         {"last_cmd_act", item_size(last_cmd_act),
  70          item_addr(last_cmd_act), DBG_CMD_NUM},
  71         {"last_cmd_index", item_size(last_cmd_index),
  72          item_addr(last_cmd_index), 1},
  73         {"last_cmd_resp_id", item_size(last_cmd_resp_id),
  74          item_addr(last_cmd_resp_id), DBG_CMD_NUM},
  75         {"last_cmd_resp_index", item_size(last_cmd_resp_index),
  76          item_addr(last_cmd_resp_index), 1},
  77         {"last_event", item_size(last_event),
  78          item_addr(last_event), DBG_CMD_NUM},
  79         {"last_event_index", item_size(last_event_index),
  80          item_addr(last_event_index), 1},
  81         {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure),
  82          item_addr(num_cmd_host_to_card_failure), 1},
  83         {"num_cmd_sleep_cfm_fail",
  84          item_size(num_cmd_sleep_cfm_host_to_card_failure),
  85          item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1},
  86         {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure),
  87          item_addr(num_tx_host_to_card_failure), 1},
  88         {"num_evt_deauth", item_size(num_event_deauth),
  89          item_addr(num_event_deauth), 1},
  90         {"num_evt_disassoc", item_size(num_event_disassoc),
  91          item_addr(num_event_disassoc), 1},
  92         {"num_evt_link_lost", item_size(num_event_link_lost),
  93          item_addr(num_event_link_lost), 1},
  94         {"num_cmd_deauth", item_size(num_cmd_deauth),
  95          item_addr(num_cmd_deauth), 1},
  96         {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success),
  97          item_addr(num_cmd_assoc_success), 1},
  98         {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure),
  99          item_addr(num_cmd_assoc_failure), 1},
 100         {"cmd_sent", item_size(cmd_sent),
 101          item_addr(cmd_sent), 1},
 102         {"data_sent", item_size(data_sent),
 103          item_addr(data_sent), 1},
 104         {"cmd_resp_received", item_size(cmd_resp_received),
 105          item_addr(cmd_resp_received), 1},
 106         {"event_received", item_size(event_received),
 107          item_addr(event_received), 1},
 108
 109         /* variables defined in struct mwifiex_adapter */
 110         {"cmd_pending", adapter_item_size(cmd_pending),
 111          adapter_item_addr(cmd_pending), 1},
 112         {"tx_pending", adapter_item_size(tx_pending),
 113          adapter_item_addr(tx_pending), 1},
 114         {"rx_pending", adapter_item_size(rx_pending),
 115          adapter_item_addr(rx_pending), 1},
 116 };
 117
 118 static int num_of_items = ARRAY_SIZE(items);
 119
 120 /*
 121  * Firmware initialization complete callback handler.
 122  *
 123  * This function wakes up the function waiting on the init
 124  * wait queue for the firmware initialization to complete.
 125  */
 126 int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter)
 127 {
 128
 129         if (adapter->hw_status == MWIFIEX_HW_STATUS_READY)
 130                 if (adapter->if_ops.init_fw_port)
 131                         adapter->if_ops.init_fw_port(adapter);
 132
 133         adapter->init_wait_q_woken = true;
 134         wake_up_interruptible(&adapter->init_wait_q);
 135         return 0;
 136 }
 137
 138 /*
 139  * Firmware shutdown complete callback handler.
 140  *
 141  * This function sets the hardware status to not ready and wakes up
 142  * the function waiting on the init wait queue for the firmware
 143  * shutdown to complete.
 144  */
 145 int mwifiex_shutdown_fw_complete(struct mwifiex_adapter *adapter)
 146 {
 147         adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
 148         adapter->init_wait_q_woken = true;
 149         wake_up_interruptible(&adapter->init_wait_q);
 150         return 0;
 151 }
 152
 153 /*
 154  * This function sends init/shutdown command
 155  * to firmware.
 156  */
 157 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
 158                              u32 func_init_shutdown)
 159 {
 160         u16 cmd;
 161
 162         if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
 163                 cmd = HostCmd_CMD_FUNC_INIT;
 164         } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
 165                 cmd = HostCmd_CMD_FUNC_SHUTDOWN;
 166         } else {
 167                 mwifiex_dbg(priv->adapter, ERROR,
 168                             "unsupported parameter\n");
 169                 return -1;
 170         }
 171
 172         return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
 173 }
 174 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
 175
 176 /*
 177  * IOCTL request handler to set/get debug information.
 178  *
 179  * This function collates/sets the information from/to different driver
 180  * structures.
 181  */
 182 int mwifiex_get_debug_info(struct mwifiex_private *priv,
 183                            struct mwifiex_debug_info *info)
 184 {
 185         struct mwifiex_adapter *adapter = priv->adapter;
 186
 187         if (info) {
 188                 info->debug_mask = adapter->debug_mask;
 189                 memcpy(info->packets_out,
 190                        priv->wmm.packets_out,
 191                        sizeof(priv->wmm.packets_out));
 192                 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
 193                 info->tx_buf_size = (u32) adapter->tx_buf_size;
 194                 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
 195                                                               info->rx_tbl);
 196                 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
 197                                                                 info->tx_tbl);
 198                 info->tdls_peer_num = mwifiex_get_tdls_list(priv,
 199                                                             info->tdls_list);
 200                 info->ps_mode = adapter->ps_mode;
 201                 info->ps_state = adapter->ps_state;
 202                 info->is_deep_sleep = adapter->is_deep_sleep;
 203                 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
 204                 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
 205                 info->is_hs_configured = adapter->is_hs_configured;
 206                 info->hs_activated = adapter->hs_activated;
 207                 info->is_cmd_timedout = adapter->is_cmd_timedout;
 208                 info->num_cmd_host_to_card_failure
 209                                 = adapter->dbg.num_cmd_host_to_card_failure;
 210                 info->num_cmd_sleep_cfm_host_to_card_failure
 211                         = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
 212                 info->num_tx_host_to_card_failure
 213                                 = adapter->dbg.num_tx_host_to_card_failure;
 214                 info->num_event_deauth = adapter->dbg.num_event_deauth;
 215                 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
 216                 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
 217                 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
 218                 info->num_cmd_assoc_success =
 219                                         adapter->dbg.num_cmd_assoc_success;
 220                 info->num_cmd_assoc_failure =
 221                                         adapter->dbg.num_cmd_assoc_failure;
 222                 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
 223                 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
 224                 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
 225                 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
 226                        sizeof(adapter->dbg.last_cmd_id));
 227                 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
 228                        sizeof(adapter->dbg.last_cmd_act));
 229                 info->last_cmd_index = adapter->dbg.last_cmd_index;
 230                 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
 231                        sizeof(adapter->dbg.last_cmd_resp_id));
 232                 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
 233                 memcpy(info->last_event, adapter->dbg.last_event,
 234                        sizeof(adapter->dbg.last_event));
 235                 info->last_event_index = adapter->dbg.last_event_index;
 236                 info->data_sent = adapter->data_sent;
 237                 info->cmd_sent = adapter->cmd_sent;
 238                 info->cmd_resp_received = adapter->cmd_resp_received;
 239         }
 240
 241         return 0;
 242 }
 243
 244 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
 245                                  struct mwifiex_debug_info *info)
 246 {
 247         char *p = buf;
 248         struct mwifiex_debug_data *d = &items[0];
 249         size_t size, addr;
 250         long val;
 251         int i, j;
 252
 253         if (!info)
 254                 return 0;
 255
 256         for (i = 0; i < num_of_items; i++) {
 257                 p += sprintf(p, "%s=", d[i].name);
 258
 259                 size = d[i].size / d[i].num;
 260
 261                 if (i < (num_of_items - 3))
 262                         addr = d[i].addr + (size_t)info;
 263                 else /* The last 3 items are struct mwifiex_adapter variables */
 264                         addr = d[i].addr + (size_t)priv->adapter;
 265
 266                 for (j = 0; j < d[i].num; j++) {
 267                         switch (size) {
 268                         case 1:
 269                                 val = *((u8 *)addr);
 270                                 break;
 271                         case 2:
 272                                 val = *((u16 *)addr);
 273                                 break;
 274                         case 4:
 275                                 val = *((u32 *)addr);
 276                                 break;
 277                         case 8:
 278                                 val = *((long long *)addr);
 279                                 break;
 280                         default:
 281                                 val = -1;
 282                                 break;
 283                         }
 284
 285                         p += sprintf(p, "%#lx ", val);
 286                         addr += size;
 287                 }
 288
 289                 p += sprintf(p, "\n");
 290         }
 291
 292         if (info->tx_tbl_num) {
 293                 p += sprintf(p, "Tx BA stream table:\n");
 294                 for (i = 0; i < info->tx_tbl_num; i++)
 295                         p += sprintf(p, "tid = %d, ra = %pM\n",
 296                                      info->tx_tbl[i].tid, info->tx_tbl[i].ra);
 297         }
 298
 299         if (info->rx_tbl_num) {
 300                 p += sprintf(p, "Rx reorder table:\n");
 301                 for (i = 0; i < info->rx_tbl_num; i++) {
 302                         p += sprintf(p, "tid = %d, ta = %pM, ",
 303                                      info->rx_tbl[i].tid,
 304                                      info->rx_tbl[i].ta);
 305                         p += sprintf(p, "start_win = %d, ",
 306                                      info->rx_tbl[i].start_win);
 307                         p += sprintf(p, "win_size = %d, buffer: ",
 308                                      info->rx_tbl[i].win_size);
 309
 310                         for (j = 0; j < info->rx_tbl[i].win_size; j++)
 311                                 p += sprintf(p, "%c ",
 312                                              info->rx_tbl[i].buffer[j] ?
 313                                              '1' : '0');
 314
 315                         p += sprintf(p, "\n");
 316                 }
 317         }
 318
 319         if (info->tdls_peer_num) {
 320                 p += sprintf(p, "TDLS peer table:\n");
 321                 for (i = 0; i < info->tdls_peer_num; i++) {
 322                         p += sprintf(p, "peer = %pM",
 323                                      info->tdls_list[i].peer_addr);
 324                         p += sprintf(p, "\n");
 325                 }
 326         }
 327
 328         return p - buf;
 329 }
 330
 331 static int
 332 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
 333                           struct rxpd *rx_pd)
 334 {
 335         u16 stype;
 336         u8 category, action_code, *addr2;
 337         struct ieee80211_hdr *ieee_hdr = (void *)payload;
 338
 339         stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
 340
 341         switch (stype) {
 342         case IEEE80211_STYPE_ACTION:
 343                 category = *(payload + sizeof(struct ieee80211_hdr));
 344                 switch (category) {
 345                 case WLAN_CATEGORY_PUBLIC:
 346                         action_code = *(payload + sizeof(struct ieee80211_hdr)
 347                                         + 1);
 348                         if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
 349                                 addr2 = ieee_hdr->addr2;
 350                                 mwifiex_dbg(priv->adapter, INFO,
 351                                             "TDLS discovery response %pM nf=%d, snr=%d\n",
 352                                             addr2, rx_pd->nf, rx_pd->snr);
 353                                 mwifiex_auto_tdls_update_peer_signal(priv,
 354                                                                      addr2,
 355                                                                      rx_pd->snr,
 356                                                                      rx_pd->nf);
 357                         }
 358                         break;
 359                 case WLAN_CATEGORY_BACK:
 360                         /*we dont indicate BACK action frames to cfg80211*/
 361                         mwifiex_dbg(priv->adapter, INFO,
 362                                     "drop BACK action frames");
 363                         return -1;
 364                 default:
 365                         mwifiex_dbg(priv->adapter, INFO,
 366                                     "unknown public action frame category %d\n",
 367                                     category);
 368                 }
 369         default:
 370                 mwifiex_dbg(priv->adapter, INFO,
 371                     "unknown mgmt frame subtype %#x\n", stype);
 372                 return 0;
 373         }
 374
 375         return 0;
 376 }
 377 /*
 378  * This function processes the received management packet and send it
 379  * to the kernel.
 380  */
 381 int
 382 mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
 383                             struct sk_buff *skb)
 384 {
 385         struct rxpd *rx_pd;
 386         u16 pkt_len;
 387         struct ieee80211_hdr *ieee_hdr;
 388
 389         if (!skb)
 390                 return -1;
 391
 392         if (!priv->mgmt_frame_mask ||
 393             priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
 394                 mwifiex_dbg(priv->adapter, ERROR,
 395                             "do not receive mgmt frames on uninitialized intf");
 396                 return -1;
 397         }
 398
 399         rx_pd = (struct rxpd *)skb->data;
 400
 401         skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
 402         skb_pull(skb, sizeof(pkt_len));
 403
 404         pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
 405
 406         ieee_hdr = (void *)skb->data;
 407         if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
 408                 if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
 409                                               pkt_len, rx_pd))
 410                         return -1;
 411         }
 412         /* Remove address4 */
 413         memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
 414                 skb->data + sizeof(struct ieee80211_hdr),
 415                 pkt_len - sizeof(struct ieee80211_hdr));
 416
 417         pkt_len -= ETH_ALEN + sizeof(pkt_len);
 418         rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
 419
 420         cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,
 421                          CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
 422                          0);
 423
 424         return 0;
 425 }
 426
 427 /*
 428  * This function processes the received packet before sending it to the
 429  * kernel.
 430  *
 431  * It extracts the SKB from the received buffer and sends it to kernel.
 432  * In case the received buffer does not contain the data in SKB format,
 433  * the function creates a blank SKB, fills it with the data from the
 434  * received buffer and then sends this new SKB to the kernel.
 435  */
 436 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
 437 {
 438         struct mwifiex_sta_node *src_node;
 439         struct ethhdr *p_ethhdr;
 440
 441         if (!skb)
 442                 return -1;
 443
 444         priv->stats.rx_bytes += skb->len;
 445         priv->stats.rx_packets++;
 446
 447         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
 448                 p_ethhdr = (void *)skb->data;
 449                 src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source);
 450                 if (src_node) {
 451                         src_node->stats.last_rx = jiffies;
 452                         src_node->stats.rx_bytes += skb->len;
 453                         src_node->stats.rx_packets++;
 454                 }
 455         }
 456
 457         skb->dev = priv->netdev;
 458         skb->protocol = eth_type_trans(skb, priv->netdev);
 459         skb->ip_summed = CHECKSUM_NONE;
 460
 461         /* This is required only in case of 11n and USB/PCIE as we alloc
 462          * a buffer of 4K only if its 11N (to be able to receive 4K
 463          * AMSDU packets). In case of SD we allocate buffers based
 464          * on the size of packet and hence this is not needed.
 465          *
 466          * Modifying the truesize here as our allocation for each
 467          * skb is 4K but we only receive 2K packets and this cause
 468          * the kernel to start dropping packets in case where
 469          * application has allocated buffer based on 2K size i.e.
 470          * if there a 64K packet received (in IP fragments and
 471          * application allocates 64K to receive this packet but
 472          * this packet would almost double up because we allocate
 473          * each 1.5K fragment in 4K and pass it up. As soon as the
 474          * 64K limit hits kernel will start to drop rest of the
 475          * fragments. Currently we fail the Filesndl-ht.scr script
 476          * for UDP, hence this fix
 477          */
 478         if ((priv->adapter->iface_type == MWIFIEX_USB ||
 479              priv->adapter->iface_type == MWIFIEX_PCIE) &&
 480             (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
 481                 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
 482
 483         if (in_interrupt())
 484                 netif_rx(skb);
 485         else
 486                 netif_rx_ni(skb);
 487
 488         return 0;
 489 }
 490
 491 /*
 492  * IOCTL completion callback handler.
 493  *
 494  * This function is called when a pending IOCTL is completed.
 495  *
 496  * If work queue support is enabled, the function wakes up the
 497  * corresponding waiting function. Otherwise, it processes the
 498  * IOCTL response and frees the response buffer.
 499  */
 500 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
 501                          struct cmd_ctrl_node *cmd_node)
 502 {
 503         WARN_ON(!cmd_node->wait_q_enabled);
 504         mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n",
 505                     adapter->cmd_wait_q.status);
 506
 507         *cmd_node->condition = true;
 508         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 509
 510         return 0;
 511 }
 512
 513 /* This function will return the pointer to station entry in station list
 514  * table which matches specified mac address.
 515  * This function should be called after acquiring RA list spinlock.
 516  * NULL is returned if station entry is not found in associated STA list.
 517  */
 518 struct mwifiex_sta_node *
 519 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 520 {
 521         struct mwifiex_sta_node *node;
 522
 523         if (!mac)
 524                 return NULL;
 525
 526         list_for_each_entry(node, &priv->sta_list, list) {
 527                 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
 528                         return node;
 529         }
 530
 531         return NULL;
 532 }
 533
 534 static struct mwifiex_sta_node *
 535 mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status)
 536 {
 537         struct mwifiex_sta_node *node;
 538
 539         list_for_each_entry(node, &priv->sta_list, list) {
 540                 if (node->tdls_status == status)
 541                         return node;
 542         }
 543
 544         return NULL;
 545 }
 546
 547 /* If tdls channel switching is on-going, tx data traffic should be
 548  * blocked until the switching stage completed.
 549  */
 550 u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv)
 551 {
 552         struct mwifiex_sta_node *sta_ptr;
 553
 554         if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
 555                 return false;
 556
 557         sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING);
 558         if (sta_ptr)
 559                 return true;
 560
 561         return false;
 562 }
 563
 564 u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv)
 565 {
 566         struct mwifiex_sta_node *sta_ptr;
 567
 568         if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
 569                 return false;
 570
 571         sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN);
 572         if (sta_ptr)
 573                 return true;
 574
 575         return false;
 576 }
 577
 578 /* If tdls channel switching is on-going or tdls operate on off-channel,
 579  * cmd path should be blocked until tdls switched to base-channel.
 580  */
 581 u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv)
 582 {
 583         if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
 584                 return true;
 585
 586         if (mwifiex_is_tdls_chan_switching(priv) ||
 587             mwifiex_is_tdls_off_chan(priv))
 588                 return false;
 589
 590         return true;
 591 }
 592
 593 /* This function will add a sta_node entry to associated station list
 594  * table with the given mac address.
 595  * If entry exist already, existing entry is returned.
 596  * If received mac address is NULL, NULL is returned.
 597  */
 598 struct mwifiex_sta_node *
 599 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 600 {
 601         struct mwifiex_sta_node *node;
 602         unsigned long flags;
 603
 604         if (!mac)
 605                 return NULL;
 606
 607         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 608         node = mwifiex_get_sta_entry(priv, mac);
 609         if (node)
 610                 goto done;
 611
 612         node = kzalloc(sizeof(*node), GFP_ATOMIC);
 613         if (!node)
 614                 goto done;
 615
 616         memcpy(node->mac_addr, mac, ETH_ALEN);
 617         list_add_tail(&node->list, &priv->sta_list);
 618
 619 done:
 620         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 621         return node;
 622 }
 623
 624 /* This function will search for HT IE in association request IEs
 625  * and set station HT parameters accordingly.
 626  */
 627 void
 628 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
 629                        int ies_len, struct mwifiex_sta_node *node)
 630 {
 631         struct ieee_types_header *ht_cap_ie;
 632         const struct ieee80211_ht_cap *ht_cap;
 633
 634         if (!ies)
 635                 return;
 636
 637         ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies,
 638                                              ies_len);
 639         if (ht_cap_ie) {
 640                 ht_cap = (void *)(ht_cap_ie + 1);
 641                 node->is_11n_enabled = 1;
 642                 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
 643                                   IEEE80211_HT_CAP_MAX_AMSDU ?
 644                                   MWIFIEX_TX_DATA_BUF_SIZE_8K :
 645                                   MWIFIEX_TX_DATA_BUF_SIZE_4K;
 646         } else {
 647                 node->is_11n_enabled = 0;
 648         }
 649
 650         return;
 651 }
 652
 653 /* This function will delete a station entry from station list */
 654 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 655 {
 656         struct mwifiex_sta_node *node;
 657         unsigned long flags;
 658
 659         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 660
 661         node = mwifiex_get_sta_entry(priv, mac);
 662         if (node) {
 663                 list_del(&node->list);
 664                 kfree(node);
 665         }
 666
 667         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 668         return;
 669 }
 670
 671 /* This function will delete all stations from associated station list. */
 672 void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
 673 {
 674         struct mwifiex_sta_node *node, *tmp;
 675         unsigned long flags;
 676
 677         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 678
 679         list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
 680                 list_del(&node->list);
 681                 kfree(node);
 682         }
 683
 684         INIT_LIST_HEAD(&priv->sta_list);
 685         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 686         return;
 687 }
 688
 689 /* This function adds histogram data to histogram array*/
 690 void mwifiex_hist_data_add(struct mwifiex_private *priv,
 691                            u8 rx_rate, s8 snr, s8 nflr)
 692 {
 693         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 694
 695         if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES)
 696                 mwifiex_hist_data_reset(priv);
 697         mwifiex_hist_data_set(priv, rx_rate, snr, nflr);
 698 }
 699
 700 /* function to add histogram record */
 701 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
 702                            s8 nflr)
 703 {
 704         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 705
 706         atomic_inc(&phist_data->num_samples);
 707         atomic_inc(&phist_data->rx_rate[rx_rate]);
 708         atomic_inc(&phist_data->snr[snr]);
 709         atomic_inc(&phist_data->noise_flr[128 + nflr]);
 710         atomic_inc(&phist_data->sig_str[nflr - snr]);
 711 }
 712
 713 /* function to reset histogram data during init/reset */
 714 void mwifiex_hist_data_reset(struct mwifiex_private *priv)
 715 {
 716         int ix;
 717         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 718
 719         atomic_set(&phist_data->num_samples, 0);
 720         for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++)
 721                 atomic_set(&phist_data->rx_rate[ix], 0);
 722         for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++)
 723                 atomic_set(&phist_data->snr[ix], 0);
 724         for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++)
 725                 atomic_set(&phist_data->noise_flr[ix], 0);
 726         for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++)
 727                 atomic_set(&phist_data->sig_str[ix], 0);
 728 }
 729
 730 void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags)
 731 {
 732         struct sk_buff *skb;
 733         int buf_len, pad;
 734
 735         buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ;
 736
 737         skb = __dev_alloc_skb(buf_len, flags);
 738
 739         if (!skb)
 740                 return NULL;
 741
 742         skb_reserve(skb, MWIFIEX_RX_HEADROOM);
 743
 744         pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) -
 745               (long)skb->data;
 746
 747         skb_reserve(skb, pad);
 748
 749         return skb;
 750 }
 751 EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf);