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         {"last_mp_wr_bitmap", item_size(last_mp_wr_bitmap),
  82          item_addr(last_mp_wr_bitmap), MWIFIEX_DBG_SDIO_MP_NUM},
  83         {"last_mp_wr_ports", item_size(last_mp_wr_ports),
  84          item_addr(last_mp_wr_ports), MWIFIEX_DBG_SDIO_MP_NUM},
  85         {"last_mp_wr_len", item_size(last_mp_wr_len),
  86          item_addr(last_mp_wr_len), MWIFIEX_DBG_SDIO_MP_NUM},
  87         {"last_mp_curr_wr_port", item_size(last_mp_curr_wr_port),
  88          item_addr(last_mp_curr_wr_port), MWIFIEX_DBG_SDIO_MP_NUM},
  89         {"last_sdio_mp_index", item_size(last_sdio_mp_index),
  90          item_addr(last_sdio_mp_index), 1},
  91         {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure),
  92          item_addr(num_cmd_host_to_card_failure), 1},
  93         {"num_cmd_sleep_cfm_fail",
  94          item_size(num_cmd_sleep_cfm_host_to_card_failure),
  95          item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1},
  96         {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure),
  97          item_addr(num_tx_host_to_card_failure), 1},
  98         {"num_evt_deauth", item_size(num_event_deauth),
  99          item_addr(num_event_deauth), 1},
 100         {"num_evt_disassoc", item_size(num_event_disassoc),
 101          item_addr(num_event_disassoc), 1},
 102         {"num_evt_link_lost", item_size(num_event_link_lost),
 103          item_addr(num_event_link_lost), 1},
 104         {"num_cmd_deauth", item_size(num_cmd_deauth),
 105          item_addr(num_cmd_deauth), 1},
 106         {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success),
 107          item_addr(num_cmd_assoc_success), 1},
 108         {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure),
 109          item_addr(num_cmd_assoc_failure), 1},
 110         {"cmd_sent", item_size(cmd_sent),
 111          item_addr(cmd_sent), 1},
 112         {"data_sent", item_size(data_sent),
 113          item_addr(data_sent), 1},
 114         {"cmd_resp_received", item_size(cmd_resp_received),
 115          item_addr(cmd_resp_received), 1},
 116         {"event_received", item_size(event_received),
 117          item_addr(event_received), 1},
 118
 119         /* variables defined in struct mwifiex_adapter */
 120         {"cmd_pending", adapter_item_size(cmd_pending),
 121          adapter_item_addr(cmd_pending), 1},
 122         {"tx_pending", adapter_item_size(tx_pending),
 123          adapter_item_addr(tx_pending), 1},
 124         {"rx_pending", adapter_item_size(rx_pending),
 125          adapter_item_addr(rx_pending), 1},
 126 };
 127
 128 static int num_of_items = ARRAY_SIZE(items);
 129
 130 /*
 131  * Firmware initialization complete callback handler.
 132  *
 133  * This function wakes up the function waiting on the init
 134  * wait queue for the firmware initialization to complete.
 135  */
 136 int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter)
 137 {
 138
 139         if (adapter->hw_status == MWIFIEX_HW_STATUS_READY)
 140                 if (adapter->if_ops.init_fw_port)
 141                         adapter->if_ops.init_fw_port(adapter);
 142
 143         adapter->init_wait_q_woken = true;
 144         wake_up_interruptible(&adapter->init_wait_q);
 145         return 0;
 146 }
 147
 148 /*
 149  * This function sends init/shutdown command
 150  * to firmware.
 151  */
 152 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
 153                              u32 func_init_shutdown)
 154 {
 155         u16 cmd;
 156
 157         if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
 158                 cmd = HostCmd_CMD_FUNC_INIT;
 159         } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
 160                 cmd = HostCmd_CMD_FUNC_SHUTDOWN;
 161         } else {
 162                 mwifiex_dbg(priv->adapter, ERROR,
 163                             "unsupported parameter\n");
 164                 return -1;
 165         }
 166
 167         return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
 168 }
 169 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
 170
 171 /*
 172  * IOCTL request handler to set/get debug information.
 173  *
 174  * This function collates/sets the information from/to different driver
 175  * structures.
 176  */
 177 int mwifiex_get_debug_info(struct mwifiex_private *priv,
 178                            struct mwifiex_debug_info *info)
 179 {
 180         struct mwifiex_adapter *adapter = priv->adapter;
 181
 182         if (info) {
 183                 info->debug_mask = adapter->debug_mask;
 184                 memcpy(info->packets_out,
 185                        priv->wmm.packets_out,
 186                        sizeof(priv->wmm.packets_out));
 187                 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
 188                 info->tx_buf_size = (u32) adapter->tx_buf_size;
 189                 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
 190                                                               info->rx_tbl);
 191                 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
 192                                                                 info->tx_tbl);
 193                 info->tdls_peer_num = mwifiex_get_tdls_list(priv,
 194                                                             info->tdls_list);
 195                 info->ps_mode = adapter->ps_mode;
 196                 info->ps_state = adapter->ps_state;
 197                 info->is_deep_sleep = adapter->is_deep_sleep;
 198                 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
 199                 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
 200                 info->is_hs_configured = test_bit(MWIFIEX_IS_HS_CONFIGURED,
 201                                                   &adapter->work_flags);
 202                 info->hs_activated = adapter->hs_activated;
 203                 info->is_cmd_timedout = test_bit(MWIFIEX_IS_CMD_TIMEDOUT,
 204                                                  &adapter->work_flags);
 205                 info->num_cmd_host_to_card_failure
 206                                 = adapter->dbg.num_cmd_host_to_card_failure;
 207                 info->num_cmd_sleep_cfm_host_to_card_failure
 208                         = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
 209                 info->num_tx_host_to_card_failure
 210                                 = adapter->dbg.num_tx_host_to_card_failure;
 211                 info->num_event_deauth = adapter->dbg.num_event_deauth;
 212                 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
 213                 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
 214                 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
 215                 info->num_cmd_assoc_success =
 216                                         adapter->dbg.num_cmd_assoc_success;
 217                 info->num_cmd_assoc_failure =
 218                                         adapter->dbg.num_cmd_assoc_failure;
 219                 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
 220                 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
 221                 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
 222                 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
 223                        sizeof(adapter->dbg.last_cmd_id));
 224                 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
 225                        sizeof(adapter->dbg.last_cmd_act));
 226                 info->last_cmd_index = adapter->dbg.last_cmd_index;
 227                 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
 228                        sizeof(adapter->dbg.last_cmd_resp_id));
 229                 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
 230                 memcpy(info->last_event, adapter->dbg.last_event,
 231                        sizeof(adapter->dbg.last_event));
 232                 info->last_event_index = adapter->dbg.last_event_index;
 233                 memcpy(info->last_mp_wr_bitmap, adapter->dbg.last_mp_wr_bitmap,
 234                        sizeof(adapter->dbg.last_mp_wr_bitmap));
 235                 memcpy(info->last_mp_wr_ports, adapter->dbg.last_mp_wr_ports,
 236                        sizeof(adapter->dbg.last_mp_wr_ports));
 237                 memcpy(info->last_mp_curr_wr_port,
 238                        adapter->dbg.last_mp_curr_wr_port,
 239                        sizeof(adapter->dbg.last_mp_curr_wr_port));
 240                 memcpy(info->last_mp_wr_len, adapter->dbg.last_mp_wr_len,
 241                        sizeof(adapter->dbg.last_mp_wr_len));
 242                 info->last_sdio_mp_index = adapter->dbg.last_sdio_mp_index;
 243                 info->data_sent = adapter->data_sent;
 244                 info->cmd_sent = adapter->cmd_sent;
 245                 info->cmd_resp_received = adapter->cmd_resp_received;
 246         }
 247
 248         return 0;
 249 }
 250
 251 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
 252                                  struct mwifiex_debug_info *info)
 253 {
 254         char *p = buf;
 255         struct mwifiex_debug_data *d = &items[0];
 256         size_t size, addr;
 257         long val;
 258         int i, j;
 259
 260         if (!info)
 261                 return 0;
 262
 263         for (i = 0; i < num_of_items; i++) {
 264                 p += sprintf(p, "%s=", d[i].name);
 265
 266                 size = d[i].size / d[i].num;
 267
 268                 if (i < (num_of_items - 3))
 269                         addr = d[i].addr + (size_t)info;
 270                 else /* The last 3 items are struct mwifiex_adapter variables */
 271                         addr = d[i].addr + (size_t)priv->adapter;
 272
 273                 for (j = 0; j < d[i].num; j++) {
 274                         switch (size) {
 275                         case 1:
 276                                 val = *((u8 *)addr);
 277                                 break;
 278                         case 2:
 279                                 val = get_unaligned((u16 *)addr);
 280                                 break;
 281                         case 4:
 282                                 val = get_unaligned((u32 *)addr);
 283                                 break;
 284                         case 8:
 285                                 val = get_unaligned((long long *)addr);
 286                                 break;
 287                         default:
 288                                 val = -1;
 289                                 break;
 290                         }
 291
 292                         p += sprintf(p, "%#lx ", val);
 293                         addr += size;
 294                 }
 295
 296                 p += sprintf(p, "\n");
 297         }
 298
 299         if (info->tx_tbl_num) {
 300                 p += sprintf(p, "Tx BA stream table:\n");
 301                 for (i = 0; i < info->tx_tbl_num; i++)
 302                         p += sprintf(p, "tid = %d, ra = %pM\n",
 303                                      info->tx_tbl[i].tid, info->tx_tbl[i].ra);
 304         }
 305
 306         if (info->rx_tbl_num) {
 307                 p += sprintf(p, "Rx reorder table:\n");
 308                 for (i = 0; i < info->rx_tbl_num; i++) {
 309                         p += sprintf(p, "tid = %d, ta = %pM, ",
 310                                      info->rx_tbl[i].tid,
 311                                      info->rx_tbl[i].ta);
 312                         p += sprintf(p, "start_win = %d, ",
 313                                      info->rx_tbl[i].start_win);
 314                         p += sprintf(p, "win_size = %d, buffer: ",
 315                                      info->rx_tbl[i].win_size);
 316
 317                         for (j = 0; j < info->rx_tbl[i].win_size; j++)
 318                                 p += sprintf(p, "%c ",
 319                                              info->rx_tbl[i].buffer[j] ?
 320                                              '1' : '0');
 321
 322                         p += sprintf(p, "\n");
 323                 }
 324         }
 325
 326         if (info->tdls_peer_num) {
 327                 p += sprintf(p, "TDLS peer table:\n");
 328                 for (i = 0; i < info->tdls_peer_num; i++) {
 329                         p += sprintf(p, "peer = %pM",
 330                                      info->tdls_list[i].peer_addr);
 331                         p += sprintf(p, "\n");
 332                 }
 333         }
 334
 335         return p - buf;
 336 }
 337
 338 static int
 339 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
 340                           struct rxpd *rx_pd)
 341 {
 342         u16 stype;
 343         u8 category, action_code, *addr2;
 344         struct ieee80211_hdr *ieee_hdr = (void *)payload;
 345
 346         stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
 347
 348         switch (stype) {
 349         case IEEE80211_STYPE_ACTION:
 350                 category = *(payload + sizeof(struct ieee80211_hdr));
 351                 switch (category) {
 352                 case WLAN_CATEGORY_PUBLIC:
 353                         action_code = *(payload + sizeof(struct ieee80211_hdr)
 354                                         + 1);
 355                         if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
 356                                 addr2 = ieee_hdr->addr2;
 357                                 mwifiex_dbg(priv->adapter, INFO,
 358                                             "TDLS discovery response %pM nf=%d, snr=%d\n",
 359                                             addr2, rx_pd->nf, rx_pd->snr);
 360                                 mwifiex_auto_tdls_update_peer_signal(priv,
 361                                                                      addr2,
 362                                                                      rx_pd->snr,
 363                                                                      rx_pd->nf);
 364                         }
 365                         break;
 366                 case WLAN_CATEGORY_BACK:
 367                         /*we dont indicate BACK action frames to cfg80211*/
 368                         mwifiex_dbg(priv->adapter, INFO,
 369                                     "drop BACK action frames");
 370                         return -1;
 371                 default:
 372                         mwifiex_dbg(priv->adapter, INFO,
 373                                     "unknown public action frame category %d\n",
 374                                     category);
 375                 }
 376                 break;
 377         default:
 378                 mwifiex_dbg(priv->adapter, INFO,
 379                     "unknown mgmt frame subtype %#x\n", stype);
 380                 return 0;
 381         }
 382
 383         return 0;
 384 }
 385 /*
 386  * This function processes the received management packet and send it
 387  * to the kernel.
 388  */
 389 int
 390 mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
 391                             struct sk_buff *skb)
 392 {
 393         struct rxpd *rx_pd;
 394         u16 pkt_len;
 395         struct ieee80211_hdr *ieee_hdr;
 396
 397         if (!skb)
 398                 return -1;
 399
 400         if (!priv->mgmt_frame_mask ||
 401             priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
 402                 mwifiex_dbg(priv->adapter, ERROR,
 403                             "do not receive mgmt frames on uninitialized intf");
 404                 return -1;
 405         }
 406
 407         rx_pd = (struct rxpd *)skb->data;
 408
 409         skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
 410         skb_pull(skb, sizeof(pkt_len));
 411
 412         pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
 413
 414         ieee_hdr = (void *)skb->data;
 415         if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
 416                 if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
 417                                               pkt_len, rx_pd))
 418                         return -1;
 419         }
 420         /* Remove address4 */
 421         memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
 422                 skb->data + sizeof(struct ieee80211_hdr),
 423                 pkt_len - sizeof(struct ieee80211_hdr));
 424
 425         pkt_len -= ETH_ALEN + sizeof(pkt_len);
 426         rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
 427
 428         cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,
 429                          CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
 430                          0);
 431
 432         return 0;
 433 }
 434
 435 /*
 436  * This function processes the received packet before sending it to the
 437  * kernel.
 438  *
 439  * It extracts the SKB from the received buffer and sends it to kernel.
 440  * In case the received buffer does not contain the data in SKB format,
 441  * the function creates a blank SKB, fills it with the data from the
 442  * received buffer and then sends this new SKB to the kernel.
 443  */
 444 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
 445 {
 446         struct mwifiex_sta_node *src_node;
 447         struct ethhdr *p_ethhdr;
 448
 449         if (!skb)
 450                 return -1;
 451
 452         priv->stats.rx_bytes += skb->len;
 453         priv->stats.rx_packets++;
 454
 455         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
 456                 p_ethhdr = (void *)skb->data;
 457                 src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source);
 458                 if (src_node) {
 459                         src_node->stats.last_rx = jiffies;
 460                         src_node->stats.rx_bytes += skb->len;
 461                         src_node->stats.rx_packets++;
 462                 }
 463         }
 464
 465         skb->dev = priv->netdev;
 466         skb->protocol = eth_type_trans(skb, priv->netdev);
 467         skb->ip_summed = CHECKSUM_NONE;
 468
 469         /* This is required only in case of 11n and USB/PCIE as we alloc
 470          * a buffer of 4K only if its 11N (to be able to receive 4K
 471          * AMSDU packets). In case of SD we allocate buffers based
 472          * on the size of packet and hence this is not needed.
 473          *
 474          * Modifying the truesize here as our allocation for each
 475          * skb is 4K but we only receive 2K packets and this cause
 476          * the kernel to start dropping packets in case where
 477          * application has allocated buffer based on 2K size i.e.
 478          * if there a 64K packet received (in IP fragments and
 479          * application allocates 64K to receive this packet but
 480          * this packet would almost double up because we allocate
 481          * each 1.5K fragment in 4K and pass it up. As soon as the
 482          * 64K limit hits kernel will start to drop rest of the
 483          * fragments. Currently we fail the Filesndl-ht.scr script
 484          * for UDP, hence this fix
 485          */
 486         if ((priv->adapter->iface_type == MWIFIEX_USB ||
 487              priv->adapter->iface_type == MWIFIEX_PCIE) &&
 488             (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
 489                 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
 490
 491         if (in_interrupt())
 492                 netif_rx(skb);
 493         else
 494                 netif_rx_ni(skb);
 495
 496         return 0;
 497 }
 498
 499 /*
 500  * IOCTL completion callback handler.
 501  *
 502  * This function is called when a pending IOCTL is completed.
 503  *
 504  * If work queue support is enabled, the function wakes up the
 505  * corresponding waiting function. Otherwise, it processes the
 506  * IOCTL response and frees the response buffer.
 507  */
 508 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
 509                          struct cmd_ctrl_node *cmd_node)
 510 {
 511         WARN_ON(!cmd_node->wait_q_enabled);
 512         mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n",
 513                     adapter->cmd_wait_q.status);
 514
 515         *cmd_node->condition = true;
 516         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 517
 518         return 0;
 519 }
 520
 521 /* This function will return the pointer to station entry in station list
 522  * table which matches specified mac address.
 523  * This function should be called after acquiring RA list spinlock.
 524  * NULL is returned if station entry is not found in associated STA list.
 525  */
 526 struct mwifiex_sta_node *
 527 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 528 {
 529         struct mwifiex_sta_node *node;
 530
 531         if (!mac)
 532                 return NULL;
 533
 534         list_for_each_entry(node, &priv->sta_list, list) {
 535                 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
 536                         return node;
 537         }
 538
 539         return NULL;
 540 }
 541
 542 static struct mwifiex_sta_node *
 543 mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status)
 544 {
 545         struct mwifiex_sta_node *node;
 546
 547         list_for_each_entry(node, &priv->sta_list, list) {
 548                 if (node->tdls_status == status)
 549                         return node;
 550         }
 551
 552         return NULL;
 553 }
 554
 555 /* If tdls channel switching is on-going, tx data traffic should be
 556  * blocked until the switching stage completed.
 557  */
 558 u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv)
 559 {
 560         struct mwifiex_sta_node *sta_ptr;
 561
 562         if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
 563                 return false;
 564
 565         sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING);
 566         if (sta_ptr)
 567                 return true;
 568
 569         return false;
 570 }
 571
 572 u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv)
 573 {
 574         struct mwifiex_sta_node *sta_ptr;
 575
 576         if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
 577                 return false;
 578
 579         sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN);
 580         if (sta_ptr)
 581                 return true;
 582
 583         return false;
 584 }
 585
 586 /* If tdls channel switching is on-going or tdls operate on off-channel,
 587  * cmd path should be blocked until tdls switched to base-channel.
 588  */
 589 u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv)
 590 {
 591         if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
 592                 return true;
 593
 594         if (mwifiex_is_tdls_chan_switching(priv) ||
 595             mwifiex_is_tdls_off_chan(priv))
 596                 return false;
 597
 598         return true;
 599 }
 600
 601 /* This function will add a sta_node entry to associated station list
 602  * table with the given mac address.
 603  * If entry exist already, existing entry is returned.
 604  * If received mac address is NULL, NULL is returned.
 605  */
 606 struct mwifiex_sta_node *
 607 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 608 {
 609         struct mwifiex_sta_node *node;
 610         unsigned long flags;
 611
 612         if (!mac)
 613                 return NULL;
 614
 615         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 616         node = mwifiex_get_sta_entry(priv, mac);
 617         if (node)
 618                 goto done;
 619
 620         node = kzalloc(sizeof(*node), GFP_ATOMIC);
 621         if (!node)
 622                 goto done;
 623
 624         memcpy(node->mac_addr, mac, ETH_ALEN);
 625         list_add_tail(&node->list, &priv->sta_list);
 626
 627 done:
 628         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 629         return node;
 630 }
 631
 632 /* This function will search for HT IE in association request IEs
 633  * and set station HT parameters accordingly.
 634  */
 635 void
 636 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
 637                        int ies_len, struct mwifiex_sta_node *node)
 638 {
 639         struct ieee_types_header *ht_cap_ie;
 640         const struct ieee80211_ht_cap *ht_cap;
 641
 642         if (!ies)
 643                 return;
 644
 645         ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies,
 646                                              ies_len);
 647         if (ht_cap_ie) {
 648                 ht_cap = (void *)(ht_cap_ie + 1);
 649                 node->is_11n_enabled = 1;
 650                 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
 651                                   IEEE80211_HT_CAP_MAX_AMSDU ?
 652                                   MWIFIEX_TX_DATA_BUF_SIZE_8K :
 653                                   MWIFIEX_TX_DATA_BUF_SIZE_4K;
 654         } else {
 655                 node->is_11n_enabled = 0;
 656         }
 657
 658         return;
 659 }
 660
 661 /* This function will delete a station entry from station list */
 662 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 663 {
 664         struct mwifiex_sta_node *node;
 665         unsigned long flags;
 666
 667         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 668
 669         node = mwifiex_get_sta_entry(priv, mac);
 670         if (node) {
 671                 list_del(&node->list);
 672                 kfree(node);
 673         }
 674
 675         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 676         return;
 677 }
 678
 679 /* This function will delete all stations from associated station list. */
 680 void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
 681 {
 682         struct mwifiex_sta_node *node, *tmp;
 683         unsigned long flags;
 684
 685         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 686
 687         list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
 688                 list_del(&node->list);
 689                 kfree(node);
 690         }
 691
 692         INIT_LIST_HEAD(&priv->sta_list);
 693         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 694         return;
 695 }
 696
 697 /* This function adds histogram data to histogram array*/
 698 void mwifiex_hist_data_add(struct mwifiex_private *priv,
 699                            u8 rx_rate, s8 snr, s8 nflr)
 700 {
 701         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 702
 703         if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES)
 704                 mwifiex_hist_data_reset(priv);
 705         mwifiex_hist_data_set(priv, rx_rate, snr, nflr);
 706 }
 707
 708 /* function to add histogram record */
 709 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
 710                            s8 nflr)
 711 {
 712         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 713         s8 nf   = -nflr;
 714         s8 rssi = snr - nflr;
 715
 716         atomic_inc(&phist_data->num_samples);
 717         atomic_inc(&phist_data->rx_rate[rx_rate]);
 718         atomic_inc(&phist_data->snr[snr + 128]);
 719         atomic_inc(&phist_data->noise_flr[nf + 128]);
 720         atomic_inc(&phist_data->sig_str[rssi + 128]);
 721 }
 722
 723 /* function to reset histogram data during init/reset */
 724 void mwifiex_hist_data_reset(struct mwifiex_private *priv)
 725 {
 726         int ix;
 727         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 728
 729         atomic_set(&phist_data->num_samples, 0);
 730         for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++)
 731                 atomic_set(&phist_data->rx_rate[ix], 0);
 732         for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++)
 733                 atomic_set(&phist_data->snr[ix], 0);
 734         for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++)
 735                 atomic_set(&phist_data->noise_flr[ix], 0);
 736         for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++)
 737                 atomic_set(&phist_data->sig_str[ix], 0);
 738 }
 739
 740 void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags)
 741 {
 742         struct sk_buff *skb;
 743         int buf_len, pad;
 744
 745         buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ;
 746
 747         skb = __dev_alloc_skb(buf_len, flags);
 748
 749         if (!skb)
 750                 return NULL;
 751
 752         skb_reserve(skb, MWIFIEX_RX_HEADROOM);
 753
 754         pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) -
 755               (long)skb->data;
 756
 757         skb_reserve(skb, pad);
 758
 759         return skb;
 760 }
 761 EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf);
 762
 763 void mwifiex_fw_dump_event(struct mwifiex_private *priv)
 764 {
 765         mwifiex_send_cmd(priv, HostCmd_CMD_FW_DUMP_EVENT, HostCmd_ACT_GEN_SET,
 766                          0, NULL, true);
 767 }
 768 EXPORT_SYMBOL_GPL(mwifiex_fw_dump_event);