drivers/net/wireless/ath/ath6kl/main.c

   1 /*
   2  * Copyright (c) 2004-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "core.h"
  18 #include "hif-ops.h"
  19 #include "cfg80211.h"
  20 #include "target.h"
  21 #include "debug.h"
  22
  23 struct ath6kl_sta *ath6kl_find_sta(struct ath6kl *ar, u8 *node_addr)
  24 {
  25         struct ath6kl_sta *conn = NULL;
  26         u8 i, max_conn;
  27
  28         max_conn = (ar->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;
  29
  30         for (i = 0; i < max_conn; i++) {
  31                 if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
  32                         conn = &ar->sta_list[i];
  33                         break;
  34                 }
  35         }
  36
  37         return conn;
  38 }
  39
  40 struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
  41 {
  42         struct ath6kl_sta *conn = NULL;
  43         u8 ctr;
  44
  45         for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
  46                 if (ar->sta_list[ctr].aid == aid) {
  47                         conn = &ar->sta_list[ctr];
  48                         break;
  49                 }
  50         }
  51         return conn;
  52 }
  53
  54 static void ath6kl_add_new_sta(struct ath6kl *ar, u8 *mac, u16 aid, u8 *wpaie,
  55                         u8 ielen, u8 keymgmt, u8 ucipher, u8 auth)
  56 {
  57         struct ath6kl_sta *sta;
  58         u8 free_slot;
  59
  60         free_slot = aid - 1;
  61
  62         sta = &ar->sta_list[free_slot];
  63         memcpy(sta->mac, mac, ETH_ALEN);
  64         memcpy(sta->wpa_ie, wpaie, ielen);
  65         sta->aid = aid;
  66         sta->keymgmt = keymgmt;
  67         sta->ucipher = ucipher;
  68         sta->auth = auth;
  69
  70         ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
  71         ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
  72 }
  73
  74 static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
  75 {
  76         struct ath6kl_sta *sta = &ar->sta_list[i];
  77
  78         /* empty the queued pkts in the PS queue if any */
  79         spin_lock_bh(&sta->psq_lock);
  80         skb_queue_purge(&sta->psq);
  81         spin_unlock_bh(&sta->psq_lock);
  82
  83         memset(&ar->ap_stats.sta[sta->aid - 1], 0,
  84                sizeof(struct wmi_per_sta_stat));
  85         memset(sta->mac, 0, ETH_ALEN);
  86         memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
  87         sta->aid = 0;
  88         sta->sta_flags = 0;
  89
  90         ar->sta_list_index = ar->sta_list_index & ~(1 << i);
  91
  92 }
  93
  94 static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
  95 {
  96         u8 i, removed = 0;
  97
  98         if (is_zero_ether_addr(mac))
  99                 return removed;
 100
 101         if (is_broadcast_ether_addr(mac)) {
 102                 ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");
 103
 104                 for (i = 0; i < AP_MAX_NUM_STA; i++) {
 105                         if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
 106                                 ath6kl_sta_cleanup(ar, i);
 107                                 removed = 1;
 108                         }
 109                 }
 110         } else {
 111                 for (i = 0; i < AP_MAX_NUM_STA; i++) {
 112                         if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
 113                                 ath6kl_dbg(ATH6KL_DBG_TRC,
 114                                            "deleting station %pM aid=%d reason=%d\n",
 115                                            mac, ar->sta_list[i].aid, reason);
 116                                 ath6kl_sta_cleanup(ar, i);
 117                                 removed = 1;
 118                                 break;
 119                         }
 120                 }
 121         }
 122
 123         return removed;
 124 }
 125
 126 enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
 127 {
 128         struct ath6kl *ar = devt;
 129         return ar->ac2ep_map[ac];
 130 }
 131
 132 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
 133 {
 134         struct ath6kl_cookie *cookie;
 135
 136         cookie = ar->cookie_list;
 137         if (cookie != NULL) {
 138                 ar->cookie_list = cookie->arc_list_next;
 139                 ar->cookie_count--;
 140         }
 141
 142         return cookie;
 143 }
 144
 145 void ath6kl_cookie_init(struct ath6kl *ar)
 146 {
 147         u32 i;
 148
 149         ar->cookie_list = NULL;
 150         ar->cookie_count = 0;
 151
 152         memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));
 153
 154         for (i = 0; i < MAX_COOKIE_NUM; i++)
 155                 ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
 156 }
 157
 158 void ath6kl_cookie_cleanup(struct ath6kl *ar)
 159 {
 160         ar->cookie_list = NULL;
 161         ar->cookie_count = 0;
 162 }
 163
 164 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
 165 {
 166         /* Insert first */
 167
 168         if (!ar || !cookie)
 169                 return;
 170
 171         cookie->arc_list_next = ar->cookie_list;
 172         ar->cookie_list = cookie;
 173         ar->cookie_count++;
 174 }
 175
 176 /* set the window address register (using 4-byte register access ). */
 177 static int ath6kl_set_addrwin_reg(struct ath6kl *ar, u32 reg_addr, u32 addr)
 178 {
 179         int status;
 180         u8 addr_val[4];
 181         s32 i;
 182
 183         /*
 184          * Write bytes 1,2,3 of the register to set the upper address bytes,
 185          * the LSB is written last to initiate the access cycle
 186          */
 187
 188         for (i = 1; i <= 3; i++) {
 189                 /*
 190                  * Fill the buffer with the address byte value we want to
 191                  * hit 4 times.
 192                  */
 193                 memset(addr_val, ((u8 *)&addr)[i], 4);
 194
 195                 /*
 196                  * Hit each byte of the register address with a 4-byte
 197                  * write operation to the same address, this is a harmless
 198                  * operation.
 199                  */
 200                 status = hif_read_write_sync(ar, reg_addr + i, addr_val,
 201                                              4, HIF_WR_SYNC_BYTE_FIX);
 202                 if (status)
 203                         break;
 204         }
 205
 206         if (status) {
 207                 ath6kl_err("failed to write initial bytes of 0x%x to window reg: 0x%X\n",
 208                            addr, reg_addr);
 209                 return status;
 210         }
 211
 212         /*
 213          * Write the address register again, this time write the whole
 214          * 4-byte value. The effect here is that the LSB write causes the
 215          * cycle to start, the extra 3 byte write to bytes 1,2,3 has no
 216          * effect since we are writing the same values again
 217          */
 218         status = hif_read_write_sync(ar, reg_addr, (u8 *)(&addr),
 219                                      4, HIF_WR_SYNC_BYTE_INC);
 220
 221         if (status) {
 222                 ath6kl_err("failed to write 0x%x to window reg: 0x%X\n",
 223                            addr, reg_addr);
 224                 return status;
 225         }
 226
 227         return 0;
 228 }
 229
 230 /*
 231  * Read from the ATH6KL through its diagnostic window. No cooperation from
 232  * the Target is required for this.
 233  */
 234 int ath6kl_read_reg_diag(struct ath6kl *ar, u32 *address, u32 *data)
 235 {
 236         int status;
 237
 238         /* set window register to start read cycle */
 239         status = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS,
 240                                         *address);
 241
 242         if (status)
 243                 return status;
 244
 245         /* read the data */
 246         status = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *)data,
 247                                      sizeof(u32), HIF_RD_SYNC_BYTE_INC);
 248         if (status) {
 249                 ath6kl_err("failed to read from window data addr\n");
 250                 return status;
 251         }
 252
 253         return status;
 254 }
 255
 256
 257 /*
 258  * Write to the ATH6KL through its diagnostic window. No cooperation from
 259  * the Target is required for this.
 260  */
 261 static int ath6kl_write_reg_diag(struct ath6kl *ar, u32 *address, u32 *data)
 262 {
 263         int status;
 264
 265         /* set write data */
 266         status = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *)data,
 267                                      sizeof(u32), HIF_WR_SYNC_BYTE_INC);
 268         if (status) {
 269                 ath6kl_err("failed to write 0x%x to window data addr\n", *data);
 270                 return status;
 271         }
 272
 273         /* set window register, which starts the write cycle */
 274         return ath6kl_set_addrwin_reg(ar, WINDOW_WRITE_ADDR_ADDRESS,
 275                                       *address);
 276 }
 277
 278 int ath6kl_access_datadiag(struct ath6kl *ar, u32 address,
 279                            u8 *data, u32 length, bool read)
 280 {
 281         u32 count;
 282         int status = 0;
 283
 284         for (count = 0; count < length; count += 4, address += 4) {
 285                 if (read) {
 286                         status = ath6kl_read_reg_diag(ar, &address,
 287                                                       (u32 *) &data[count]);
 288                         if (status)
 289                                 break;
 290                 } else {
 291                         status = ath6kl_write_reg_diag(ar, &address,
 292                                                        (u32 *) &data[count]);
 293                         if (status)
 294                                 break;
 295                 }
 296         }
 297
 298         return status;
 299 }
 300
 301 /* FIXME: move to a better place, target.h? */
 302 #define AR6003_RESET_CONTROL_ADDRESS 0x00004000
 303 #define AR6004_RESET_CONTROL_ADDRESS 0x00004000
 304
 305 static void ath6kl_reset_device(struct ath6kl *ar, u32 target_type,
 306                                 bool wait_fot_compltn, bool cold_reset)
 307 {
 308         int status = 0;
 309         u32 address;
 310         u32 data;
 311
 312         if (target_type != TARGET_TYPE_AR6003 &&
 313                 target_type != TARGET_TYPE_AR6004)
 314                 return;
 315
 316         data = cold_reset ? RESET_CONTROL_COLD_RST : RESET_CONTROL_MBOX_RST;
 317
 318         switch (target_type) {
 319         case TARGET_TYPE_AR6003:
 320                 address = AR6003_RESET_CONTROL_ADDRESS;
 321                 break;
 322         case TARGET_TYPE_AR6004:
 323                 address = AR6004_RESET_CONTROL_ADDRESS;
 324                 break;
 325         default:
 326                 address = AR6003_RESET_CONTROL_ADDRESS;
 327                 break;
 328         }
 329
 330         status = ath6kl_write_reg_diag(ar, &address, &data);
 331
 332         if (status)
 333                 ath6kl_err("failed to reset target\n");
 334 }
 335
 336 void ath6kl_stop_endpoint(struct net_device *dev, bool keep_profile,
 337                           bool get_dbglogs)
 338 {
 339         struct ath6kl *ar = ath6kl_priv(dev);
 340         static u8 bcast_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 341         bool discon_issued;
 342
 343         netif_stop_queue(dev);
 344
 345         /* disable the target and the interrupts associated with it */
 346         if (test_bit(WMI_READY, &ar->flag)) {
 347                 discon_issued = (test_bit(CONNECTED, &ar->flag) ||
 348                                  test_bit(CONNECT_PEND, &ar->flag));
 349                 ath6kl_disconnect(ar);
 350                 if (!keep_profile)
 351                         ath6kl_init_profile_info(ar);
 352
 353                 del_timer(&ar->disconnect_timer);
 354
 355                 clear_bit(WMI_READY, &ar->flag);
 356                 ath6kl_wmi_shutdown(ar->wmi);
 357                 clear_bit(WMI_ENABLED, &ar->flag);
 358                 ar->wmi = NULL;
 359
 360                 /*
 361                  * After wmi_shudown all WMI events will be dropped. We
 362                  * need to cleanup the buffers allocated in AP mode and
 363                  * give disconnect notification to stack, which usually
 364                  * happens in the disconnect_event. Simulate the disconnect
 365                  * event by calling the function directly. Sometimes
 366                  * disconnect_event will be received when the debug logs
 367                  * are collected.
 368                  */
 369                 if (discon_issued)
 370                         ath6kl_disconnect_event(ar, DISCONNECT_CMD,
 371                                                 (ar->nw_type & AP_NETWORK) ?
 372                                                 bcast_mac : ar->bssid,
 373                                                 0, NULL, 0);
 374
 375                 ar->user_key_ctrl = 0;
 376
 377         } else {
 378                 ath6kl_dbg(ATH6KL_DBG_TRC,
 379                            "%s: wmi is not ready 0x%p 0x%p\n",
 380                            __func__, ar, ar->wmi);
 381
 382                 /* Shut down WMI if we have started it */
 383                 if (test_bit(WMI_ENABLED, &ar->flag)) {
 384                         ath6kl_dbg(ATH6KL_DBG_TRC,
 385                                    "%s: shut down wmi\n", __func__);
 386                         ath6kl_wmi_shutdown(ar->wmi);
 387                         clear_bit(WMI_ENABLED, &ar->flag);
 388                         ar->wmi = NULL;
 389                 }
 390         }
 391
 392         if (ar->htc_target) {
 393                 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: shut down htc\n", __func__);
 394                 ath6kl_htc_stop(ar->htc_target);
 395         }
 396
 397         /*
 398          * Try to reset the device if we can. The driver may have been
 399          * configure NOT to reset the target during a debug session.
 400          */
 401         ath6kl_dbg(ATH6KL_DBG_TRC,
 402                    "attempting to reset target on instance destroy\n");
 403         ath6kl_reset_device(ar, ar->target_type, true, true);
 404 }
 405
 406 static void ath6kl_install_static_wep_keys(struct ath6kl *ar)
 407 {
 408         u8 index;
 409         u8 keyusage;
 410
 411         for (index = WMI_MIN_KEY_INDEX; index <= WMI_MAX_KEY_INDEX; index++) {
 412                 if (ar->wep_key_list[index].key_len) {
 413                         keyusage = GROUP_USAGE;
 414                         if (index == ar->def_txkey_index)
 415                                 keyusage |= TX_USAGE;
 416
 417                         ath6kl_wmi_addkey_cmd(ar->wmi,
 418                                               index,
 419                                               WEP_CRYPT,
 420                                               keyusage,
 421                                               ar->wep_key_list[index].key_len,
 422                                               NULL,
 423                                               ar->wep_key_list[index].key,
 424                                               KEY_OP_INIT_VAL, NULL,
 425                                               NO_SYNC_WMIFLAG);
 426                 }
 427         }
 428 }
 429
 430 static void ath6kl_connect_ap_mode(struct ath6kl *ar, u16 channel, u8 *bssid,
 431                                    u16 listen_int, u16 beacon_int,
 432                                    u8 assoc_resp_len, u8 *assoc_info)
 433 {
 434         struct net_device *dev = ar->net_dev;
 435         struct station_info sinfo;
 436         struct ath6kl_req_key *ik;
 437         enum crypto_type keyType = NONE_CRYPT;
 438
 439         if (memcmp(dev->dev_addr, bssid, ETH_ALEN) == 0) {
 440                 ik = &ar->ap_mode_bkey;
 441
 442                 switch (ar->auth_mode) {
 443                 case NONE_AUTH:
 444                         if (ar->prwise_crypto == WEP_CRYPT)
 445                                 ath6kl_install_static_wep_keys(ar);
 446                         break;
 447                 case WPA_PSK_AUTH:
 448                 case WPA2_PSK_AUTH:
 449                 case (WPA_PSK_AUTH|WPA2_PSK_AUTH):
 450                         switch (ik->ik_type) {
 451                         case ATH6KL_CIPHER_TKIP:
 452                                 keyType = TKIP_CRYPT;
 453                                 break;
 454                         case ATH6KL_CIPHER_AES_CCM:
 455                                 keyType = AES_CRYPT;
 456                                 break;
 457                         default:
 458                                 goto skip_key;
 459                         }
 460                         ath6kl_wmi_addkey_cmd(ar->wmi, ik->ik_keyix, keyType,
 461                                               GROUP_USAGE, ik->ik_keylen,
 462                                               (u8 *)&ik->ik_keyrsc,
 463                                               ik->ik_keydata,
 464                                               KEY_OP_INIT_VAL, ik->ik_macaddr,
 465                                               SYNC_BOTH_WMIFLAG);
 466                         break;
 467                 }
 468 skip_key:
 469                 set_bit(CONNECTED, &ar->flag);
 470                 return;
 471         }
 472
 473         ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n",
 474                    bssid, channel);
 475
 476         ath6kl_add_new_sta(ar, bssid, channel, assoc_info, assoc_resp_len,
 477                            listen_int & 0xFF, beacon_int,
 478                            (listen_int >> 8) & 0xFF);
 479
 480         /* send event to application */
 481         memset(&sinfo, 0, sizeof(sinfo));
 482
 483         /* TODO: sinfo.generation */
 484         /* TODO: need to deliver (Re)AssocReq IEs somehow.. change in
 485          * cfg80211 needed, e.g., by adding those into sinfo
 486          */
 487         cfg80211_new_sta(ar->net_dev, bssid, &sinfo, GFP_KERNEL);
 488
 489         netif_wake_queue(ar->net_dev);
 490
 491         return;
 492 }
 493
 494 /* Functions for Tx credit handling */
 495 void ath6k_credit_init(struct htc_credit_state_info *cred_info,
 496                        struct list_head *ep_list,
 497                        int tot_credits)
 498 {
 499         struct htc_endpoint_credit_dist *cur_ep_dist;
 500         int count;
 501
 502         cred_info->cur_free_credits = tot_credits;
 503         cred_info->total_avail_credits = tot_credits;
 504
 505         list_for_each_entry(cur_ep_dist, ep_list, list) {
 506                 if (cur_ep_dist->endpoint == ENDPOINT_0)
 507                         continue;
 508
 509                 cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg;
 510
 511                 if (tot_credits > 4)
 512                         if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) ||
 513                             (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) {
 514                                 ath6kl_deposit_credit_to_ep(cred_info,
 515                                                 cur_ep_dist,
 516                                                 cur_ep_dist->cred_min);
 517                                 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
 518                         }
 519
 520                 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) {
 521                         ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist,
 522                                                     cur_ep_dist->cred_min);
 523                         /*
 524                          * Control service is always marked active, it
 525                          * never goes inactive EVER.
 526                          */
 527                         cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
 528                 } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC)
 529                         /* this is the lowest priority data endpoint */
 530                         cred_info->lowestpri_ep_dist = cur_ep_dist->list;
 531
 532                 /*
 533                  * Streams have to be created (explicit | implicit) for all
 534                  * kinds of traffic. BE endpoints are also inactive in the
 535                  * beginning. When BE traffic starts it creates implicit
 536                  * streams that redistributes credits.
 537                  *
 538                  * Note: all other endpoints have minimums set but are
 539                  * initially given NO credits. credits will be distributed
 540                  * as traffic activity demands
 541                  */
 542         }
 543
 544         WARN_ON(cred_info->cur_free_credits <= 0);
 545
 546         list_for_each_entry(cur_ep_dist, ep_list, list) {
 547                 if (cur_ep_dist->endpoint == ENDPOINT_0)
 548                         continue;
 549
 550                 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC)
 551                         cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg;
 552                 else {
 553                         /*
 554                          * For the remaining data endpoints, we assume that
 555                          * each cred_per_msg are the same. We use a simple
 556                          * calculation here, we take the remaining credits
 557                          * and determine how many max messages this can
 558                          * cover and then set each endpoint's normal value
 559                          * equal to 3/4 this amount.
 560                          */
 561                         count = (cred_info->cur_free_credits /
 562                                  cur_ep_dist->cred_per_msg)
 563                                 * cur_ep_dist->cred_per_msg;
 564                         count = (count * 3) >> 2;
 565                         count = max(count, cur_ep_dist->cred_per_msg);
 566                         cur_ep_dist->cred_norm = count;
 567
 568                 }
 569         }
 570 }
 571
 572 /* initialize and setup credit distribution */
 573 int ath6k_setup_credit_dist(void *htc_handle,
 574                             struct htc_credit_state_info *cred_info)
 575 {
 576         u16 servicepriority[5];
 577
 578         memset(cred_info, 0, sizeof(struct htc_credit_state_info));
 579
 580         servicepriority[0] = WMI_CONTROL_SVC;  /* highest */
 581         servicepriority[1] = WMI_DATA_VO_SVC;
 582         servicepriority[2] = WMI_DATA_VI_SVC;
 583         servicepriority[3] = WMI_DATA_BE_SVC;
 584         servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */
 585
 586         /* set priority list */
 587         ath6kl_htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5);
 588
 589         return 0;
 590 }
 591
 592 /* reduce an ep's credits back to a set limit */
 593 static void ath6k_reduce_credits(struct htc_credit_state_info *cred_info,
 594                                  struct htc_endpoint_credit_dist  *ep_dist,
 595                                  int limit)
 596 {
 597         int credits;
 598
 599         ep_dist->cred_assngd = limit;
 600
 601         if (ep_dist->credits <= limit)
 602                 return;
 603
 604         credits = ep_dist->credits - limit;
 605         ep_dist->credits -= credits;
 606         cred_info->cur_free_credits += credits;
 607 }
 608
 609 static void ath6k_credit_update(struct htc_credit_state_info *cred_info,
 610                                 struct list_head *epdist_list)
 611 {
 612         struct htc_endpoint_credit_dist *cur_dist_list;
 613
 614         list_for_each_entry(cur_dist_list, epdist_list, list) {
 615                 if (cur_dist_list->endpoint == ENDPOINT_0)
 616                         continue;
 617
 618                 if (cur_dist_list->cred_to_dist > 0) {
 619                         cur_dist_list->credits +=
 620                                         cur_dist_list->cred_to_dist;
 621                         cur_dist_list->cred_to_dist = 0;
 622                         if (cur_dist_list->credits >
 623                             cur_dist_list->cred_assngd)
 624                                 ath6k_reduce_credits(cred_info,
 625                                                 cur_dist_list,
 626                                                 cur_dist_list->cred_assngd);
 627
 628                         if (cur_dist_list->credits >
 629                             cur_dist_list->cred_norm)
 630                                 ath6k_reduce_credits(cred_info, cur_dist_list,
 631                                                      cur_dist_list->cred_norm);
 632
 633                         if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) {
 634                                 if (cur_dist_list->txq_depth == 0)
 635                                         ath6k_reduce_credits(cred_info,
 636                                                              cur_dist_list, 0);
 637                         }
 638                 }
 639         }
 640 }
 641
 642 /*
 643  * HTC has an endpoint that needs credits, ep_dist is the endpoint in
 644  * question.
 645  */
 646 void ath6k_seek_credits(struct htc_credit_state_info *cred_info,
 647                         struct htc_endpoint_credit_dist *ep_dist)
 648 {
 649         struct htc_endpoint_credit_dist *curdist_list;
 650         int credits = 0;
 651         int need;
 652
 653         if (ep_dist->svc_id == WMI_CONTROL_SVC)
 654                 goto out;
 655
 656         if ((ep_dist->svc_id == WMI_DATA_VI_SVC) ||
 657             (ep_dist->svc_id == WMI_DATA_VO_SVC))
 658                 if ((ep_dist->cred_assngd >= ep_dist->cred_norm))
 659                         goto out;
 660
 661         /*
 662          * For all other services, we follow a simple algorithm of:
 663          *
 664          * 1. checking the free pool for credits
 665          * 2. checking lower priority endpoints for credits to take
 666          */
 667
 668         credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
 669
 670         if (credits >= ep_dist->seek_cred)
 671                 goto out;
 672
 673         /*
 674          * We don't have enough in the free pool, try taking away from
 675          * lower priority services The rule for taking away credits:
 676          *
 677          *   1. Only take from lower priority endpoints
 678          *   2. Only take what is allocated above the minimum (never
 679          *      starve an endpoint completely)
 680          *   3. Only take what you need.
 681          */
 682
 683         list_for_each_entry_reverse(curdist_list,
 684                                     &cred_info->lowestpri_ep_dist,
 685                                     list) {
 686                 if (curdist_list == ep_dist)
 687                         break;
 688
 689                 need = ep_dist->seek_cred - cred_info->cur_free_credits;
 690
 691                 if ((curdist_list->cred_assngd - need) >=
 692                      curdist_list->cred_min) {
 693                         /*
 694                          * The current one has been allocated more than
 695                          * it's minimum and it has enough credits assigned
 696                          * above it's minimum to fulfill our need try to
 697                          * take away just enough to fulfill our need.
 698                          */
 699                         ath6k_reduce_credits(cred_info, curdist_list,
 700                                         curdist_list->cred_assngd - need);
 701
 702                         if (cred_info->cur_free_credits >=
 703                             ep_dist->seek_cred)
 704                                 break;
 705                 }
 706
 707                 if (curdist_list->endpoint == ENDPOINT_0)
 708                         break;
 709         }
 710
 711         credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
 712
 713 out:
 714         /* did we find some credits? */
 715         if (credits)
 716                 ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits);
 717
 718         ep_dist->seek_cred = 0;
 719 }
 720
 721 /* redistribute credits based on activity change */
 722 static void ath6k_redistribute_credits(struct htc_credit_state_info *info,
 723                                        struct list_head *ep_dist_list)
 724 {
 725         struct htc_endpoint_credit_dist *curdist_list;
 726
 727         list_for_each_entry(curdist_list, ep_dist_list, list) {
 728                 if (curdist_list->endpoint == ENDPOINT_0)
 729                         continue;
 730
 731                 if ((curdist_list->svc_id == WMI_DATA_BK_SVC)  ||
 732                     (curdist_list->svc_id == WMI_DATA_BE_SVC))
 733                         curdist_list->dist_flags |= HTC_EP_ACTIVE;
 734
 735                 if ((curdist_list->svc_id != WMI_CONTROL_SVC) &&
 736                     !(curdist_list->dist_flags & HTC_EP_ACTIVE)) {
 737                         if (curdist_list->txq_depth == 0)
 738                                 ath6k_reduce_credits(info,
 739                                                 curdist_list, 0);
 740                         else
 741                                 ath6k_reduce_credits(info,
 742                                                 curdist_list,
 743                                                 curdist_list->cred_min);
 744                 }
 745         }
 746 }
 747
 748 /*
 749  *
 750  * This function is invoked whenever endpoints require credit
 751  * distributions. A lock is held while this function is invoked, this
 752  * function shall NOT block. The ep_dist_list is a list of distribution
 753  * structures in prioritized order as defined by the call to the
 754  * htc_set_credit_dist() api.
 755  */
 756 void ath6k_credit_distribute(struct htc_credit_state_info *cred_info,
 757                              struct list_head *ep_dist_list,
 758                              enum htc_credit_dist_reason reason)
 759 {
 760         switch (reason) {
 761         case HTC_CREDIT_DIST_SEND_COMPLETE:
 762                 ath6k_credit_update(cred_info, ep_dist_list);
 763                 break;
 764         case HTC_CREDIT_DIST_ACTIVITY_CHANGE:
 765                 ath6k_redistribute_credits(cred_info, ep_dist_list);
 766                 break;
 767         default:
 768                 break;
 769         }
 770
 771         WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits);
 772         WARN_ON(cred_info->cur_free_credits < 0);
 773 }
 774
 775 void disconnect_timer_handler(unsigned long ptr)
 776 {
 777         struct net_device *dev = (struct net_device *)ptr;
 778         struct ath6kl *ar = ath6kl_priv(dev);
 779
 780         ath6kl_init_profile_info(ar);
 781         ath6kl_disconnect(ar);
 782 }
 783
 784 void ath6kl_disconnect(struct ath6kl *ar)
 785 {
 786         if (test_bit(CONNECTED, &ar->flag) ||
 787             test_bit(CONNECT_PEND, &ar->flag)) {
 788                 ath6kl_wmi_disconnect_cmd(ar->wmi);
 789                 /*
 790                  * Disconnect command is issued, clear the connect pending
 791                  * flag. The connected flag will be cleared in
 792                  * disconnect event notification.
 793                  */
 794                 clear_bit(CONNECT_PEND, &ar->flag);
 795         }
 796 }
 797
 798 /* WMI Event handlers */
 799
 800 static const char *get_hw_id_string(u32 id)
 801 {
 802         switch (id) {
 803         case AR6003_REV1_VERSION:
 804                 return "1.0";
 805         case AR6003_REV2_VERSION:
 806                 return "2.0";
 807         case AR6003_REV3_VERSION:
 808                 return "2.1.1";
 809         default:
 810                 return "unknown";
 811         }
 812 }
 813
 814 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver)
 815 {
 816         struct ath6kl *ar = devt;
 817         struct net_device *dev = ar->net_dev;
 818
 819         memcpy(dev->dev_addr, datap, ETH_ALEN);
 820         ath6kl_dbg(ATH6KL_DBG_TRC, "%s: mac addr = %pM\n",
 821                    __func__, dev->dev_addr);
 822
 823         ar->version.wlan_ver = sw_ver;
 824         ar->version.abi_ver = abi_ver;
 825
 826         snprintf(ar->wdev->wiphy->fw_version,
 827                  sizeof(ar->wdev->wiphy->fw_version),
 828                  "%u.%u.%u.%u",
 829                  (ar->version.wlan_ver & 0xf0000000) >> 28,
 830                  (ar->version.wlan_ver & 0x0f000000) >> 24,
 831                  (ar->version.wlan_ver & 0x00ff0000) >> 16,
 832                  (ar->version.wlan_ver & 0x0000ffff));
 833
 834         /* indicate to the waiting thread that the ready event was received */
 835         set_bit(WMI_READY, &ar->flag);
 836         wake_up(&ar->event_wq);
 837
 838         ath6kl_info("hw %s fw %s\n",
 839                     get_hw_id_string(ar->wdev->wiphy->hw_version),
 840                     ar->wdev->wiphy->fw_version);
 841 }
 842
 843 void ath6kl_scan_complete_evt(struct ath6kl *ar, int status)
 844 {
 845         ath6kl_cfg80211_scan_complete_event(ar, status);
 846
 847         if (!ar->usr_bss_filter)
 848                 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
 849
 850         ath6kl_dbg(ATH6KL_DBG_WLAN_SCAN, "scan complete: %d\n", status);
 851 }
 852
 853 void ath6kl_connect_event(struct ath6kl *ar, u16 channel, u8 *bssid,
 854                           u16 listen_int, u16 beacon_int,
 855                           enum network_type net_type, u8 beacon_ie_len,
 856                           u8 assoc_req_len, u8 assoc_resp_len,
 857                           u8 *assoc_info)
 858 {
 859         unsigned long flags;
 860
 861         if (ar->nw_type == AP_NETWORK) {
 862                 ath6kl_connect_ap_mode(ar, channel, bssid, listen_int,
 863                                        beacon_int, assoc_resp_len,
 864                                        assoc_info);
 865                 return;
 866         }
 867
 868         ath6kl_cfg80211_connect_event(ar, channel, bssid,
 869                                       listen_int, beacon_int,
 870                                       net_type, beacon_ie_len,
 871                                       assoc_req_len, assoc_resp_len,
 872                                       assoc_info);
 873
 874         memcpy(ar->bssid, bssid, sizeof(ar->bssid));
 875         ar->bss_ch = channel;
 876
 877         if ((ar->nw_type == INFRA_NETWORK))
 878                 ath6kl_wmi_listeninterval_cmd(ar->wmi, ar->listen_intvl_t,
 879                                               ar->listen_intvl_b);
 880
 881         netif_wake_queue(ar->net_dev);
 882
 883         /* Update connect & link status atomically */
 884         spin_lock_irqsave(&ar->lock, flags);
 885         set_bit(CONNECTED, &ar->flag);
 886         clear_bit(CONNECT_PEND, &ar->flag);
 887         netif_carrier_on(ar->net_dev);
 888         spin_unlock_irqrestore(&ar->lock, flags);
 889
 890         aggr_reset_state(ar->aggr_cntxt);
 891         ar->reconnect_flag = 0;
 892
 893         if ((ar->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
 894                 memset(ar->node_map, 0, sizeof(ar->node_map));
 895                 ar->node_num = 0;
 896                 ar->next_ep_id = ENDPOINT_2;
 897         }
 898
 899         if (!ar->usr_bss_filter)
 900                 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
 901 }
 902
 903 void ath6kl_tkip_micerr_event(struct ath6kl *ar, u8 keyid, bool ismcast)
 904 {
 905         struct ath6kl_sta *sta;
 906         u8 tsc[6];
 907         /*
 908          * For AP case, keyid will have aid of STA which sent pkt with
 909          * MIC error. Use this aid to get MAC & send it to hostapd.
 910          */
 911         if (ar->nw_type == AP_NETWORK) {
 912                 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
 913                 if (!sta)
 914                         return;
 915
 916                 ath6kl_dbg(ATH6KL_DBG_TRC,
 917                            "ap tkip mic error received from aid=%d\n", keyid);
 918
 919                 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
 920                 cfg80211_michael_mic_failure(ar->net_dev, sta->mac,
 921                                              NL80211_KEYTYPE_PAIRWISE, keyid,
 922                                              tsc, GFP_KERNEL);
 923         } else
 924                 ath6kl_cfg80211_tkip_micerr_event(ar, keyid, ismcast);
 925
 926 }
 927
 928 static void ath6kl_update_target_stats(struct ath6kl *ar, u8 *ptr, u32 len)
 929 {
 930         struct wmi_target_stats *tgt_stats =
 931                 (struct wmi_target_stats *) ptr;
 932         struct target_stats *stats = &ar->target_stats;
 933         struct tkip_ccmp_stats *ccmp_stats;
 934         struct bss *conn_bss = NULL;
 935         struct cserv_stats *c_stats;
 936         u8 ac;
 937
 938         if (len < sizeof(*tgt_stats))
 939                 return;
 940
 941         /* update the RSSI of the connected bss */
 942         if (test_bit(CONNECTED, &ar->flag)) {
 943                 conn_bss = ath6kl_wmi_find_node(ar->wmi, ar->bssid);
 944                 if (conn_bss) {
 945                         c_stats = &tgt_stats->cserv_stats;
 946                         conn_bss->ni_rssi =
 947                                 a_sle16_to_cpu(c_stats->cs_ave_beacon_rssi);
 948                         conn_bss->ni_snr =
 949                                 tgt_stats->cserv_stats.cs_ave_beacon_snr;
 950                         ath6kl_wmi_node_return(ar->wmi, conn_bss);
 951                 }
 952         }
 953
 954         ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
 955
 956         stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
 957         stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
 958         stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
 959         stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
 960         stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
 961         stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
 962         stats->tx_bcast_pkt  += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
 963         stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
 964         stats->tx_rts_success_cnt +=
 965                 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
 966
 967         for (ac = 0; ac < WMM_NUM_AC; ac++)
 968                 stats->tx_pkt_per_ac[ac] +=
 969                         le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
 970
 971         stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
 972         stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
 973         stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
 974         stats->tx_mult_retry_cnt +=
 975                 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
 976         stats->tx_rts_fail_cnt +=
 977                 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
 978         stats->tx_ucast_rate =
 979             ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate));
 980
 981         stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
 982         stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
 983         stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
 984         stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
 985         stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
 986         stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
 987         stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
 988         stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
 989         stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
 990         stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
 991         stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
 992         stats->rx_key_cache_miss +=
 993                 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
 994         stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
 995         stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
 996         stats->rx_ucast_rate =
 997             ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate));
 998
 999         ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
1000
1001         stats->tkip_local_mic_fail +=
1002                 le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
1003         stats->tkip_cnter_measures_invoked +=
1004                 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
1005         stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
1006
1007         stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
1008         stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
1009
1010         stats->pwr_save_fail_cnt +=
1011                 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
1012         stats->noise_floor_calib =
1013                 a_sle32_to_cpu(tgt_stats->noise_floor_calib);
1014
1015         stats->cs_bmiss_cnt +=
1016                 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
1017         stats->cs_low_rssi_cnt +=
1018                 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
1019         stats->cs_connect_cnt +=
1020                 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
1021         stats->cs_discon_cnt +=
1022                 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
1023
1024         stats->cs_ave_beacon_rssi =
1025                 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
1026
1027         stats->cs_last_roam_msec =
1028                 tgt_stats->cserv_stats.cs_last_roam_msec;
1029         stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
1030         stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
1031
1032         stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
1033
1034         stats->wow_pkt_dropped +=
1035                 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
1036         stats->wow_host_pkt_wakeups +=
1037                 tgt_stats->wow_stats.wow_host_pkt_wakeups;
1038         stats->wow_host_evt_wakeups +=
1039                 tgt_stats->wow_stats.wow_host_evt_wakeups;
1040         stats->wow_evt_discarded +=
1041                 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
1042
1043         if (test_bit(STATS_UPDATE_PEND, &ar->flag)) {
1044                 clear_bit(STATS_UPDATE_PEND, &ar->flag);
1045                 wake_up(&ar->event_wq);
1046         }
1047 }
1048
1049 static void ath6kl_add_le32(__le32 *var, __le32 val)
1050 {
1051         *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
1052 }
1053
1054 void ath6kl_tgt_stats_event(struct ath6kl *ar, u8 *ptr, u32 len)
1055 {
1056         struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
1057         struct wmi_ap_mode_stat *ap = &ar->ap_stats;
1058         struct wmi_per_sta_stat *st_ap, *st_p;
1059         u8 ac;
1060
1061         if (ar->nw_type == AP_NETWORK) {
1062                 if (len < sizeof(*p))
1063                         return;
1064
1065                 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
1066                         st_ap = &ap->sta[ac];
1067                         st_p = &p->sta[ac];
1068
1069                         ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
1070                         ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
1071                         ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
1072                         ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
1073                         ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
1074                         ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
1075                         ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
1076                         ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
1077                 }
1078
1079         } else {
1080                 ath6kl_update_target_stats(ar, ptr, len);
1081         }
1082 }
1083
1084 void ath6kl_wakeup_event(void *dev)
1085 {
1086         struct ath6kl *ar = (struct ath6kl *) dev;
1087
1088         wake_up(&ar->event_wq);
1089 }
1090
1091 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
1092 {
1093         struct ath6kl *ar = (struct ath6kl *) devt;
1094
1095         ar->tx_pwr = tx_pwr;
1096         wake_up(&ar->event_wq);
1097 }
1098
1099 void ath6kl_pspoll_event(struct ath6kl *ar, u8 aid)
1100 {
1101         struct ath6kl_sta *conn;
1102         struct sk_buff *skb;
1103         bool psq_empty = false;
1104
1105         conn = ath6kl_find_sta_by_aid(ar, aid);
1106
1107         if (!conn)
1108                 return;
1109         /*
1110          * Send out a packet queued on ps queue. When the ps queue
1111          * becomes empty update the PVB for this station.
1112          */
1113         spin_lock_bh(&conn->psq_lock);
1114         psq_empty  = skb_queue_empty(&conn->psq);
1115         spin_unlock_bh(&conn->psq_lock);
1116
1117         if (psq_empty)
1118                 /* TODO: Send out a NULL data frame */
1119                 return;
1120
1121         spin_lock_bh(&conn->psq_lock);
1122         skb = skb_dequeue(&conn->psq);
1123         spin_unlock_bh(&conn->psq_lock);
1124
1125         conn->sta_flags |= STA_PS_POLLED;
1126         ath6kl_data_tx(skb, ar->net_dev);
1127         conn->sta_flags &= ~STA_PS_POLLED;
1128
1129         spin_lock_bh(&conn->psq_lock);
1130         psq_empty  = skb_queue_empty(&conn->psq);
1131         spin_unlock_bh(&conn->psq_lock);
1132
1133         if (psq_empty)
1134                 ath6kl_wmi_set_pvb_cmd(ar->wmi, conn->aid, 0);
1135 }
1136
1137 void ath6kl_dtimexpiry_event(struct ath6kl *ar)
1138 {
1139         bool mcastq_empty = false;
1140         struct sk_buff *skb;
1141
1142         /*
1143          * If there are no associated STAs, ignore the DTIM expiry event.
1144          * There can be potential race conditions where the last associated
1145          * STA may disconnect & before the host could clear the 'Indicate
1146          * DTIM' request to the firmware, the firmware would have just
1147          * indicated a DTIM expiry event. The race is between 'clear DTIM
1148          * expiry cmd' going from the host to the firmware & the DTIM
1149          * expiry event happening from the firmware to the host.
1150          */
1151         if (!ar->sta_list_index)
1152                 return;
1153
1154         spin_lock_bh(&ar->mcastpsq_lock);
1155         mcastq_empty = skb_queue_empty(&ar->mcastpsq);
1156         spin_unlock_bh(&ar->mcastpsq_lock);
1157
1158         if (mcastq_empty)
1159                 return;
1160
1161         /* set the STA flag to dtim_expired for the frame to go out */
1162         set_bit(DTIM_EXPIRED, &ar->flag);
1163
1164         spin_lock_bh(&ar->mcastpsq_lock);
1165         while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
1166                 spin_unlock_bh(&ar->mcastpsq_lock);
1167
1168                 ath6kl_data_tx(skb, ar->net_dev);
1169
1170                 spin_lock_bh(&ar->mcastpsq_lock);
1171         }
1172         spin_unlock_bh(&ar->mcastpsq_lock);
1173
1174         clear_bit(DTIM_EXPIRED, &ar->flag);
1175
1176         /* clear the LSB of the BitMapCtl field of the TIM IE */
1177         ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0);
1178 }
1179
1180 void ath6kl_disconnect_event(struct ath6kl *ar, u8 reason, u8 *bssid,
1181                              u8 assoc_resp_len, u8 *assoc_info,
1182                              u16 prot_reason_status)
1183 {
1184         struct bss *wmi_ssid_node = NULL;
1185         unsigned long flags;
1186
1187         if (ar->nw_type == AP_NETWORK) {
1188                 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
1189                         return;
1190
1191                 /* if no more associated STAs, empty the mcast PS q */
1192                 if (ar->sta_list_index == 0) {
1193                         spin_lock_bh(&ar->mcastpsq_lock);
1194                         skb_queue_purge(&ar->mcastpsq);
1195                         spin_unlock_bh(&ar->mcastpsq_lock);
1196
1197                         /* clear the LSB of the TIM IE's BitMapCtl field */
1198                         if (test_bit(WMI_READY, &ar->flag))
1199                                 ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0);
1200                 }
1201
1202                 if (!is_broadcast_ether_addr(bssid)) {
1203                         /* send event to application */
1204                         cfg80211_del_sta(ar->net_dev, bssid, GFP_KERNEL);
1205                 }
1206
1207                 clear_bit(CONNECTED, &ar->flag);
1208                 return;
1209         }
1210
1211         ath6kl_cfg80211_disconnect_event(ar, reason, bssid,
1212                                        assoc_resp_len, assoc_info,
1213                                        prot_reason_status);
1214
1215         aggr_reset_state(ar->aggr_cntxt);
1216
1217         del_timer(&ar->disconnect_timer);
1218
1219         ath6kl_dbg(ATH6KL_DBG_WLAN_CONNECT,
1220                    "disconnect reason is %d\n", reason);
1221
1222         /*
1223          * If the event is due to disconnect cmd from the host, only they
1224          * the target would stop trying to connect. Under any other
1225          * condition, target would keep trying to connect.
1226          */
1227         if (reason == DISCONNECT_CMD) {
1228                 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1229                         ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
1230         } else {
1231                 set_bit(CONNECT_PEND, &ar->flag);
1232                 if (((reason == ASSOC_FAILED) &&
1233                     (prot_reason_status == 0x11)) ||
1234                     ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0)
1235                      && (ar->reconnect_flag == 1))) {
1236                         set_bit(CONNECTED, &ar->flag);
1237                         return;
1238                 }
1239         }
1240
1241         if ((reason == NO_NETWORK_AVAIL) && test_bit(WMI_READY, &ar->flag))  {
1242                 ath6kl_wmi_node_free(ar->wmi, bssid);
1243
1244                 /*
1245                  * In case any other same SSID nodes are present remove it,
1246                  * since those nodes also not available now.
1247                  */
1248                 do {
1249                         /*
1250                          * Find the nodes based on SSID and remove it
1251                          *
1252                          * Note: This case will not work out for
1253                          * Hidden-SSID
1254                          */
1255                         wmi_ssid_node = ath6kl_wmi_find_ssid_node(ar->wmi,
1256                                                                   ar->ssid,
1257                                                                   ar->ssid_len,
1258                                                                   false,
1259                                                                   true);
1260
1261                         if (wmi_ssid_node)
1262                                 ath6kl_wmi_node_free(ar->wmi,
1263                                                      wmi_ssid_node->ni_macaddr);
1264
1265                 } while (wmi_ssid_node);
1266         }
1267
1268         /* update connect & link status atomically */
1269         spin_lock_irqsave(&ar->lock, flags);
1270         clear_bit(CONNECTED, &ar->flag);
1271         netif_carrier_off(ar->net_dev);
1272         spin_unlock_irqrestore(&ar->lock, flags);
1273
1274         if ((reason != CSERV_DISCONNECT) || (ar->reconnect_flag != 1))
1275                 ar->reconnect_flag = 0;
1276
1277         if (reason != CSERV_DISCONNECT)
1278                 ar->user_key_ctrl = 0;
1279
1280         netif_stop_queue(ar->net_dev);
1281         memset(ar->bssid, 0, sizeof(ar->bssid));
1282         ar->bss_ch = 0;
1283
1284         ath6kl_tx_data_cleanup(ar);
1285 }
1286
1287 static int ath6kl_open(struct net_device *dev)
1288 {
1289         struct ath6kl *ar = ath6kl_priv(dev);
1290         unsigned long flags;
1291
1292         spin_lock_irqsave(&ar->lock, flags);
1293
1294         set_bit(WLAN_ENABLED, &ar->flag);
1295
1296         if (test_bit(CONNECTED, &ar->flag)) {
1297                 netif_carrier_on(dev);
1298                 netif_wake_queue(dev);
1299         } else
1300                 netif_carrier_off(dev);
1301
1302         spin_unlock_irqrestore(&ar->lock, flags);
1303
1304         return 0;
1305 }
1306
1307 static int ath6kl_close(struct net_device *dev)
1308 {
1309         struct ath6kl *ar = ath6kl_priv(dev);
1310
1311         netif_stop_queue(dev);
1312
1313         ath6kl_disconnect(ar);
1314
1315         if (test_bit(WMI_READY, &ar->flag)) {
1316                 if (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0,
1317                                               0, 0, 0))
1318                         return -EIO;
1319
1320                 clear_bit(WLAN_ENABLED, &ar->flag);
1321         }
1322
1323         ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED);
1324
1325         return 0;
1326 }
1327
1328 static struct net_device_stats *ath6kl_get_stats(struct net_device *dev)
1329 {
1330         struct ath6kl *ar = ath6kl_priv(dev);
1331
1332         return &ar->net_stats;
1333 }
1334
1335 static struct net_device_ops ath6kl_netdev_ops = {
1336         .ndo_open               = ath6kl_open,
1337         .ndo_stop               = ath6kl_close,
1338         .ndo_start_xmit         = ath6kl_data_tx,
1339         .ndo_get_stats          = ath6kl_get_stats,
1340 };
1341
1342 void init_netdev(struct net_device *dev)
1343 {
1344         dev->netdev_ops = &ath6kl_netdev_ops;
1345         dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1346
1347         dev->needed_headroom = ETH_HLEN;
1348         dev->needed_headroom += sizeof(struct ath6kl_llc_snap_hdr) +
1349                                 sizeof(struct wmi_data_hdr) + HTC_HDR_LENGTH
1350                                 + WMI_MAX_TX_META_SZ + ATH6KL_HTC_ALIGN_BYTES;
1351
1352         return;
1353 }