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  * Firmware shutdown complete callback handler.
 150  *
 151  * This function sets the hardware status to not ready and wakes up
 152  * the function waiting on the init wait queue for the firmware
 153  * shutdown to complete.
 154  */
 155 int mwifiex_shutdown_fw_complete(struct mwifiex_adapter *adapter)
 156 {
 157         adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
 158         adapter->init_wait_q_woken = true;
 159         wake_up_interruptible(&adapter->init_wait_q);
 160         return 0;
 161 }
 162
 163 /*
 164  * This function sends init/shutdown command
 165  * to firmware.
 166  */
 167 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
 168                              u32 func_init_shutdown)
 169 {
 170         u16 cmd;
 171
 172         if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
 173                 cmd = HostCmd_CMD_FUNC_INIT;
 174         } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
 175                 cmd = HostCmd_CMD_FUNC_SHUTDOWN;
 176         } else {
 177                 mwifiex_dbg(priv->adapter, ERROR,
 178                             "unsupported parameter\n");
 179                 return -1;
 180         }
 181
 182         return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
 183 }
 184 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
 185
 186 /*
 187  * IOCTL request handler to set/get debug information.
 188  *
 189  * This function collates/sets the information from/to different driver
 190  * structures.
 191  */
 192 int mwifiex_get_debug_info(struct mwifiex_private *priv,
 193                            struct mwifiex_debug_info *info)
 194 {
 195         struct mwifiex_adapter *adapter = priv->adapter;
 196
 197         if (info) {
 198                 info->debug_mask = adapter->debug_mask;
 199                 memcpy(info->packets_out,
 200                        priv->wmm.packets_out,
 201                        sizeof(priv->wmm.packets_out));
 202                 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
 203                 info->tx_buf_size = (u32) adapter->tx_buf_size;
 204                 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
 205                                                               info->rx_tbl);
 206                 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
 207                                                                 info->tx_tbl);
 208                 info->tdls_peer_num = mwifiex_get_tdls_list(priv,
 209                                                             info->tdls_list);
 210                 info->ps_mode = adapter->ps_mode;
 211                 info->ps_state = adapter->ps_state;
 212                 info->is_deep_sleep = adapter->is_deep_sleep;
 213                 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
 214                 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
 215                 info->is_hs_configured = adapter->is_hs_configured;
 216                 info->hs_activated = adapter->hs_activated;
 217                 info->is_cmd_timedout = adapter->is_cmd_timedout;
 218                 info->num_cmd_host_to_card_failure
 219                                 = adapter->dbg.num_cmd_host_to_card_failure;
 220                 info->num_cmd_sleep_cfm_host_to_card_failure
 221                         = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
 222                 info->num_tx_host_to_card_failure
 223                                 = adapter->dbg.num_tx_host_to_card_failure;
 224                 info->num_event_deauth = adapter->dbg.num_event_deauth;
 225                 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
 226                 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
 227                 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
 228                 info->num_cmd_assoc_success =
 229                                         adapter->dbg.num_cmd_assoc_success;
 230                 info->num_cmd_assoc_failure =
 231                                         adapter->dbg.num_cmd_assoc_failure;
 232                 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
 233                 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
 234                 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
 235                 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
 236                        sizeof(adapter->dbg.last_cmd_id));
 237                 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
 238                        sizeof(adapter->dbg.last_cmd_act));
 239                 info->last_cmd_index = adapter->dbg.last_cmd_index;
 240                 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
 241                        sizeof(adapter->dbg.last_cmd_resp_id));
 242                 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
 243                 memcpy(info->last_event, adapter->dbg.last_event,
 244                        sizeof(adapter->dbg.last_event));
 245                 info->last_event_index = adapter->dbg.last_event_index;
 246                 memcpy(info->last_mp_wr_bitmap, adapter->dbg.last_mp_wr_bitmap,
 247                        sizeof(adapter->dbg.last_mp_wr_bitmap));
 248                 memcpy(info->last_mp_wr_ports, adapter->dbg.last_mp_wr_ports,
 249                        sizeof(adapter->dbg.last_mp_wr_ports));
 250                 memcpy(info->last_mp_curr_wr_port,
 251                        adapter->dbg.last_mp_curr_wr_port,
 252                        sizeof(adapter->dbg.last_mp_curr_wr_port));
 253                 memcpy(info->last_mp_wr_len, adapter->dbg.last_mp_wr_len,
 254                        sizeof(adapter->dbg.last_mp_wr_len));
 255                 info->last_sdio_mp_index = adapter->dbg.last_sdio_mp_index;
 256                 info->data_sent = adapter->data_sent;
 257                 info->cmd_sent = adapter->cmd_sent;
 258                 info->cmd_resp_received = adapter->cmd_resp_received;
 259         }
 260
 261         return 0;
 262 }
 263
 264 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
 265                                  struct mwifiex_debug_info *info)
 266 {
 267         char *p = buf;
 268         struct mwifiex_debug_data *d = &items[0];
 269         size_t size, addr;
 270         long val;
 271         int i, j;
 272
 273         if (!info)
 274                 return 0;
 275
 276         for (i = 0; i < num_of_items; i++) {
 277                 p += sprintf(p, "%s=", d[i].name);
 278
 279                 size = d[i].size / d[i].num;
 280
 281                 if (i < (num_of_items - 3))
 282                         addr = d[i].addr + (size_t)info;
 283                 else /* The last 3 items are struct mwifiex_adapter variables */
 284                         addr = d[i].addr + (size_t)priv->adapter;
 285
 286                 for (j = 0; j < d[i].num; j++) {
 287                         switch (size) {
 288                         case 1:
 289                                 val = *((u8 *)addr);
 290                                 break;
 291                         case 2:
 292                                 val = *((u16 *)addr);
 293                                 break;
 294                         case 4:
 295                                 val = *((u32 *)addr);
 296                                 break;
 297                         case 8:
 298                                 val = *((long long *)addr);
 299                                 break;
 300                         default:
 301                                 val = -1;
 302                                 break;
 303                         }
 304
 305                         p += sprintf(p, "%#lx ", val);
 306                         addr += size;
 307                 }
 308
 309                 p += sprintf(p, "\n");
 310         }
 311
 312         if (info->tx_tbl_num) {
 313                 p += sprintf(p, "Tx BA stream table:\n");
 314                 for (i = 0; i < info->tx_tbl_num; i++)
 315                         p += sprintf(p, "tid = %d, ra = %pM\n",
 316                                      info->tx_tbl[i].tid, info->tx_tbl[i].ra);
 317         }
 318
 319         if (info->rx_tbl_num) {
 320                 p += sprintf(p, "Rx reorder table:\n");
 321                 for (i = 0; i < info->rx_tbl_num; i++) {
 322                         p += sprintf(p, "tid = %d, ta = %pM, ",
 323                                      info->rx_tbl[i].tid,
 324                                      info->rx_tbl[i].ta);
 325                         p += sprintf(p, "start_win = %d, ",
 326                                      info->rx_tbl[i].start_win);
 327                         p += sprintf(p, "win_size = %d, buffer: ",
 328                                      info->rx_tbl[i].win_size);
 329
 330                         for (j = 0; j < info->rx_tbl[i].win_size; j++)
 331                                 p += sprintf(p, "%c ",
 332                                              info->rx_tbl[i].buffer[j] ?
 333                                              '1' : '0');
 334
 335                         p += sprintf(p, "\n");
 336                 }
 337         }
 338
 339         if (info->tdls_peer_num) {
 340                 p += sprintf(p, "TDLS peer table:\n");
 341                 for (i = 0; i < info->tdls_peer_num; i++) {
 342                         p += sprintf(p, "peer = %pM",
 343                                      info->tdls_list[i].peer_addr);
 344                         p += sprintf(p, "\n");
 345                 }
 346         }
 347
 348         return p - buf;
 349 }
 350
 351 static int
 352 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
 353                           struct rxpd *rx_pd)
 354 {
 355         u16 stype;
 356         u8 category, action_code, *addr2;
 357         struct ieee80211_hdr *ieee_hdr = (void *)payload;
 358
 359         stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
 360
 361         switch (stype) {
 362         case IEEE80211_STYPE_ACTION:
 363                 category = *(payload + sizeof(struct ieee80211_hdr));
 364                 switch (category) {
 365                 case WLAN_CATEGORY_PUBLIC:
 366                         action_code = *(payload + sizeof(struct ieee80211_hdr)
 367                                         + 1);
 368                         if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
 369                                 addr2 = ieee_hdr->addr2;
 370                                 mwifiex_dbg(priv->adapter, INFO,
 371                                             "TDLS discovery response %pM nf=%d, snr=%d\n",
 372                                             addr2, rx_pd->nf, rx_pd->snr);
 373                                 mwifiex_auto_tdls_update_peer_signal(priv,
 374                                                                      addr2,
 375                                                                      rx_pd->snr,
 376                                                                      rx_pd->nf);
 377                         }
 378                         break;
 379                 case WLAN_CATEGORY_BACK:
 380                         /*we dont indicate BACK action frames to cfg80211*/
 381                         mwifiex_dbg(priv->adapter, INFO,
 382                                     "drop BACK action frames");
 383                         return -1;
 384                 default:
 385                         mwifiex_dbg(priv->adapter, INFO,
 386                                     "unknown public action frame category %d\n",
 387                                     category);
 388                 }
 389                 break;
 390         default:
 391                 mwifiex_dbg(priv->adapter, INFO,
 392                     "unknown mgmt frame subtype %#x\n", stype);
 393                 return 0;
 394         }
 395
 396         return 0;
 397 }
 398 /*
 399  * This function processes the received management packet and send it
 400  * to the kernel.
 401  */
 402 int
 403 mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
 404                             struct sk_buff *skb)
 405 {
 406         struct rxpd *rx_pd;
 407         u16 pkt_len;
 408         struct ieee80211_hdr *ieee_hdr;
 409
 410         if (!skb)
 411                 return -1;
 412
 413         if (!priv->mgmt_frame_mask ||
 414             priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
 415                 mwifiex_dbg(priv->adapter, ERROR,
 416                             "do not receive mgmt frames on uninitialized intf");
 417                 return -1;
 418         }
 419
 420         rx_pd = (struct rxpd *)skb->data;
 421
 422         skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
 423         skb_pull(skb, sizeof(pkt_len));
 424
 425         pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
 426
 427         ieee_hdr = (void *)skb->data;
 428         if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
 429                 if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
 430                                               pkt_len, rx_pd))
 431                         return -1;
 432         }
 433         /* Remove address4 */
 434         memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
 435                 skb->data + sizeof(struct ieee80211_hdr),
 436                 pkt_len - sizeof(struct ieee80211_hdr));
 437
 438         pkt_len -= ETH_ALEN + sizeof(pkt_len);
 439         rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
 440
 441         cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,
 442                          CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
 443                          0);
 444
 445         return 0;
 446 }
 447
 448 /*
 449  * This function processes the received packet before sending it to the
 450  * kernel.
 451  *
 452  * It extracts the SKB from the received buffer and sends it to kernel.
 453  * In case the received buffer does not contain the data in SKB format,
 454  * the function creates a blank SKB, fills it with the data from the
 455  * received buffer and then sends this new SKB to the kernel.
 456  */
 457 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
 458 {
 459         struct mwifiex_sta_node *src_node;
 460         struct ethhdr *p_ethhdr;
 461
 462         if (!skb)
 463                 return -1;
 464
 465         priv->stats.rx_bytes += skb->len;
 466         priv->stats.rx_packets++;
 467
 468         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
 469                 p_ethhdr = (void *)skb->data;
 470                 src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source);
 471                 if (src_node) {
 472                         src_node->stats.last_rx = jiffies;
 473                         src_node->stats.rx_bytes += skb->len;
 474                         src_node->stats.rx_packets++;
 475                 }
 476         }
 477
 478         skb->dev = priv->netdev;
 479         skb->protocol = eth_type_trans(skb, priv->netdev);
 480         skb->ip_summed = CHECKSUM_NONE;
 481
 482         /* This is required only in case of 11n and USB/PCIE as we alloc
 483          * a buffer of 4K only if its 11N (to be able to receive 4K
 484          * AMSDU packets). In case of SD we allocate buffers based
 485          * on the size of packet and hence this is not needed.
 486          *
 487          * Modifying the truesize here as our allocation for each
 488          * skb is 4K but we only receive 2K packets and this cause
 489          * the kernel to start dropping packets in case where
 490          * application has allocated buffer based on 2K size i.e.
 491          * if there a 64K packet received (in IP fragments and
 492          * application allocates 64K to receive this packet but
 493          * this packet would almost double up because we allocate
 494          * each 1.5K fragment in 4K and pass it up. As soon as the
 495          * 64K limit hits kernel will start to drop rest of the
 496          * fragments. Currently we fail the Filesndl-ht.scr script
 497          * for UDP, hence this fix
 498          */
 499         if ((priv->adapter->iface_type == MWIFIEX_USB ||
 500              priv->adapter->iface_type == MWIFIEX_PCIE) &&
 501             (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
 502                 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
 503
 504         if (in_interrupt())
 505                 netif_rx(skb);
 506         else
 507                 netif_rx_ni(skb);
 508
 509         return 0;
 510 }
 511
 512 /*
 513  * IOCTL completion callback handler.
 514  *
 515  * This function is called when a pending IOCTL is completed.
 516  *
 517  * If work queue support is enabled, the function wakes up the
 518  * corresponding waiting function. Otherwise, it processes the
 519  * IOCTL response and frees the response buffer.
 520  */
 521 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
 522                          struct cmd_ctrl_node *cmd_node)
 523 {
 524         WARN_ON(!cmd_node->wait_q_enabled);
 525         mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n",
 526                     adapter->cmd_wait_q.status);
 527
 528         *cmd_node->condition = true;
 529         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 530
 531         return 0;
 532 }
 533
 534 /* This function will return the pointer to station entry in station list
 535  * table which matches specified mac address.
 536  * This function should be called after acquiring RA list spinlock.
 537  * NULL is returned if station entry is not found in associated STA list.
 538  */
 539 struct mwifiex_sta_node *
 540 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 541 {
 542         struct mwifiex_sta_node *node;
 543
 544         if (!mac)
 545                 return NULL;
 546
 547         list_for_each_entry(node, &priv->sta_list, list) {
 548                 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
 549                         return node;
 550         }
 551
 552         return NULL;
 553 }
 554
 555 static struct mwifiex_sta_node *
 556 mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status)
 557 {
 558         struct mwifiex_sta_node *node;
 559
 560         list_for_each_entry(node, &priv->sta_list, list) {
 561                 if (node->tdls_status == status)
 562                         return node;
 563         }
 564
 565         return NULL;
 566 }
 567
 568 /* If tdls channel switching is on-going, tx data traffic should be
 569  * blocked until the switching stage completed.
 570  */
 571 u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv)
 572 {
 573         struct mwifiex_sta_node *sta_ptr;
 574
 575         if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
 576                 return false;
 577
 578         sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING);
 579         if (sta_ptr)
 580                 return true;
 581
 582         return false;
 583 }
 584
 585 u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv)
 586 {
 587         struct mwifiex_sta_node *sta_ptr;
 588
 589         if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
 590                 return false;
 591
 592         sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN);
 593         if (sta_ptr)
 594                 return true;
 595
 596         return false;
 597 }
 598
 599 /* If tdls channel switching is on-going or tdls operate on off-channel,
 600  * cmd path should be blocked until tdls switched to base-channel.
 601  */
 602 u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv)
 603 {
 604         if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
 605                 return true;
 606
 607         if (mwifiex_is_tdls_chan_switching(priv) ||
 608             mwifiex_is_tdls_off_chan(priv))
 609                 return false;
 610
 611         return true;
 612 }
 613
 614 /* This function will add a sta_node entry to associated station list
 615  * table with the given mac address.
 616  * If entry exist already, existing entry is returned.
 617  * If received mac address is NULL, NULL is returned.
 618  */
 619 struct mwifiex_sta_node *
 620 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 621 {
 622         struct mwifiex_sta_node *node;
 623         unsigned long flags;
 624
 625         if (!mac)
 626                 return NULL;
 627
 628         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 629         node = mwifiex_get_sta_entry(priv, mac);
 630         if (node)
 631                 goto done;
 632
 633         node = kzalloc(sizeof(*node), GFP_ATOMIC);
 634         if (!node)
 635                 goto done;
 636
 637         memcpy(node->mac_addr, mac, ETH_ALEN);
 638         list_add_tail(&node->list, &priv->sta_list);
 639
 640 done:
 641         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 642         return node;
 643 }
 644
 645 /* This function will search for HT IE in association request IEs
 646  * and set station HT parameters accordingly.
 647  */
 648 void
 649 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
 650                        int ies_len, struct mwifiex_sta_node *node)
 651 {
 652         struct ieee_types_header *ht_cap_ie;
 653         const struct ieee80211_ht_cap *ht_cap;
 654
 655         if (!ies)
 656                 return;
 657
 658         ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies,
 659                                              ies_len);
 660         if (ht_cap_ie) {
 661                 ht_cap = (void *)(ht_cap_ie + 1);
 662                 node->is_11n_enabled = 1;
 663                 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
 664                                   IEEE80211_HT_CAP_MAX_AMSDU ?
 665                                   MWIFIEX_TX_DATA_BUF_SIZE_8K :
 666                                   MWIFIEX_TX_DATA_BUF_SIZE_4K;
 667         } else {
 668                 node->is_11n_enabled = 0;
 669         }
 670
 671         return;
 672 }
 673
 674 /* This function will delete a station entry from station list */
 675 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 676 {
 677         struct mwifiex_sta_node *node;
 678         unsigned long flags;
 679
 680         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 681
 682         node = mwifiex_get_sta_entry(priv, mac);
 683         if (node) {
 684                 list_del(&node->list);
 685                 kfree(node);
 686         }
 687
 688         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 689         return;
 690 }
 691
 692 /* This function will delete all stations from associated station list. */
 693 void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
 694 {
 695         struct mwifiex_sta_node *node, *tmp;
 696         unsigned long flags;
 697
 698         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 699
 700         list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
 701                 list_del(&node->list);
 702                 kfree(node);
 703         }
 704
 705         INIT_LIST_HEAD(&priv->sta_list);
 706         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 707         return;
 708 }
 709
 710 /* This function adds histogram data to histogram array*/
 711 void mwifiex_hist_data_add(struct mwifiex_private *priv,
 712                            u8 rx_rate, s8 snr, s8 nflr)
 713 {
 714         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 715
 716         if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES)
 717                 mwifiex_hist_data_reset(priv);
 718         mwifiex_hist_data_set(priv, rx_rate, snr, nflr);
 719 }
 720
 721 /* function to add histogram record */
 722 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
 723                            s8 nflr)
 724 {
 725         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 726         s8 nf   = -nflr;
 727         s8 rssi = snr - nflr;
 728
 729         atomic_inc(&phist_data->num_samples);
 730         atomic_inc(&phist_data->rx_rate[rx_rate]);
 731         atomic_inc(&phist_data->snr[snr + 128]);
 732         atomic_inc(&phist_data->noise_flr[nf + 128]);
 733         atomic_inc(&phist_data->sig_str[rssi + 128]);
 734 }
 735
 736 /* function to reset histogram data during init/reset */
 737 void mwifiex_hist_data_reset(struct mwifiex_private *priv)
 738 {
 739         int ix;
 740         struct mwifiex_histogram_data *phist_data = priv->hist_data;
 741
 742         atomic_set(&phist_data->num_samples, 0);
 743         for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++)
 744                 atomic_set(&phist_data->rx_rate[ix], 0);
 745         for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++)
 746                 atomic_set(&phist_data->snr[ix], 0);
 747         for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++)
 748                 atomic_set(&phist_data->noise_flr[ix], 0);
 749         for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++)
 750                 atomic_set(&phist_data->sig_str[ix], 0);
 751 }
 752
 753 void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags)
 754 {
 755         struct sk_buff *skb;
 756         int buf_len, pad;
 757
 758         buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ;
 759
 760         skb = __dev_alloc_skb(buf_len, flags);
 761
 762         if (!skb)
 763                 return NULL;
 764
 765         skb_reserve(skb, MWIFIEX_RX_HEADROOM);
 766
 767         pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) -
 768               (long)skb->data;
 769
 770         skb_reserve(skb, pad);
 771
 772         return skb;
 773 }
 774 EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf);