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

   1 /*
   2  * Copyright (c) 2004-2011 Atheros Communications Inc.
   3  * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  19
  20 #include "core.h"
  21 #include "hif-ops.h"
  22 #include "cfg80211.h"
  23 #include "target.h"
  24 #include "debug.h"
  25
  26 struct ath6kl_sta *ath6kl_find_sta(struct ath6kl_vif *vif, u8 *node_addr)
  27 {
  28         struct ath6kl *ar = vif->ar;
  29         struct ath6kl_sta *conn = NULL;
  30         u8 i, max_conn;
  31
  32         max_conn = (vif->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;
  33
  34         for (i = 0; i < max_conn; i++) {
  35                 if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
  36                         conn = &ar->sta_list[i];
  37                         break;
  38                 }
  39         }
  40
  41         return conn;
  42 }
  43
  44 struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
  45 {
  46         struct ath6kl_sta *conn = NULL;
  47         u8 ctr;
  48
  49         for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
  50                 if (ar->sta_list[ctr].aid == aid) {
  51                         conn = &ar->sta_list[ctr];
  52                         break;
  53                 }
  54         }
  55         return conn;
  56 }
  57
  58 static void ath6kl_add_new_sta(struct ath6kl_vif *vif, u8 *mac, u16 aid,
  59                                u8 *wpaie, size_t ielen, u8 keymgmt,
  60                                u8 ucipher, u8 auth, u8 apsd_info)
  61 {
  62         struct ath6kl *ar = vif->ar;
  63         struct ath6kl_sta *sta;
  64         u8 free_slot;
  65
  66         free_slot = aid - 1;
  67
  68         sta = &ar->sta_list[free_slot];
  69         memcpy(sta->mac, mac, ETH_ALEN);
  70         if (ielen <= ATH6KL_MAX_IE)
  71                 memcpy(sta->wpa_ie, wpaie, ielen);
  72         sta->aid = aid;
  73         sta->keymgmt = keymgmt;
  74         sta->ucipher = ucipher;
  75         sta->auth = auth;
  76         sta->apsd_info = apsd_info;
  77
  78         ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
  79         ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
  80         aggr_conn_init(vif, vif->aggr_cntxt, sta->aggr_conn);
  81 }
  82
  83 static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
  84 {
  85         struct ath6kl_sta *sta = &ar->sta_list[i];
  86         struct ath6kl_mgmt_buff *entry, *tmp;
  87
  88         /* empty the queued pkts in the PS queue if any */
  89         spin_lock_bh(&sta->psq_lock);
  90         skb_queue_purge(&sta->psq);
  91         skb_queue_purge(&sta->apsdq);
  92
  93         if (sta->mgmt_psq_len != 0) {
  94                 list_for_each_entry_safe(entry, tmp, &sta->mgmt_psq, list) {
  95                         kfree(entry);
  96                 }
  97                 INIT_LIST_HEAD(&sta->mgmt_psq);
  98                 sta->mgmt_psq_len = 0;
  99         }
 100
 101         spin_unlock_bh(&sta->psq_lock);
 102
 103         memset(&ar->ap_stats.sta[sta->aid - 1], 0,
 104                sizeof(struct wmi_per_sta_stat));
 105         memset(sta->mac, 0, ETH_ALEN);
 106         memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
 107         sta->aid = 0;
 108         sta->sta_flags = 0;
 109
 110         ar->sta_list_index = ar->sta_list_index & ~(1 << i);
 111         aggr_reset_state(sta->aggr_conn);
 112 }
 113
 114 static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
 115 {
 116         u8 i, removed = 0;
 117
 118         if (is_zero_ether_addr(mac))
 119                 return removed;
 120
 121         if (is_broadcast_ether_addr(mac)) {
 122                 ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");
 123
 124                 for (i = 0; i < AP_MAX_NUM_STA; i++) {
 125                         if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
 126                                 ath6kl_sta_cleanup(ar, i);
 127                                 removed = 1;
 128                         }
 129                 }
 130         } else {
 131                 for (i = 0; i < AP_MAX_NUM_STA; i++) {
 132                         if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
 133                                 ath6kl_dbg(ATH6KL_DBG_TRC,
 134                                            "deleting station %pM aid=%d reason=%d\n",
 135                                            mac, ar->sta_list[i].aid, reason);
 136                                 ath6kl_sta_cleanup(ar, i);
 137                                 removed = 1;
 138                                 break;
 139                         }
 140                 }
 141         }
 142
 143         return removed;
 144 }
 145
 146 enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
 147 {
 148         struct ath6kl *ar = devt;
 149         return ar->ac2ep_map[ac];
 150 }
 151
 152 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
 153 {
 154         struct ath6kl_cookie *cookie;
 155
 156         cookie = ar->cookie_list;
 157         if (cookie != NULL) {
 158                 ar->cookie_list = cookie->arc_list_next;
 159                 ar->cookie_count--;
 160         }
 161
 162         return cookie;
 163 }
 164
 165 void ath6kl_cookie_init(struct ath6kl *ar)
 166 {
 167         u32 i;
 168
 169         ar->cookie_list = NULL;
 170         ar->cookie_count = 0;
 171
 172         memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));
 173
 174         for (i = 0; i < MAX_COOKIE_NUM; i++)
 175                 ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
 176 }
 177
 178 void ath6kl_cookie_cleanup(struct ath6kl *ar)
 179 {
 180         ar->cookie_list = NULL;
 181         ar->cookie_count = 0;
 182 }
 183
 184 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
 185 {
 186         /* Insert first */
 187
 188         if (!ar || !cookie)
 189                 return;
 190
 191         cookie->arc_list_next = ar->cookie_list;
 192         ar->cookie_list = cookie;
 193         ar->cookie_count++;
 194 }
 195
 196 /*
 197  * Read from the hardware through its diagnostic window. No cooperation
 198  * from the firmware is required for this.
 199  */
 200 int ath6kl_diag_read32(struct ath6kl *ar, u32 address, u32 *value)
 201 {
 202         int ret;
 203
 204         ret = ath6kl_hif_diag_read32(ar, address, value);
 205         if (ret) {
 206                 ath6kl_warn("failed to read32 through diagnose window: %d\n",
 207                             ret);
 208                 return ret;
 209         }
 210
 211         return 0;
 212 }
 213
 214 /*
 215  * Write to the ATH6KL through its diagnostic window. No cooperation from
 216  * the Target is required for this.
 217  */
 218 int ath6kl_diag_write32(struct ath6kl *ar, u32 address, __le32 value)
 219 {
 220         int ret;
 221
 222         ret = ath6kl_hif_diag_write32(ar, address, value);
 223
 224         if (ret) {
 225                 ath6kl_err("failed to write 0x%x during diagnose window to 0x%d\n",
 226                            address, value);
 227                 return ret;
 228         }
 229
 230         return 0;
 231 }
 232
 233 int ath6kl_diag_read(struct ath6kl *ar, u32 address, void *data, u32 length)
 234 {
 235         u32 count, *buf = data;
 236         int ret;
 237
 238         if (WARN_ON(length % 4))
 239                 return -EINVAL;
 240
 241         for (count = 0; count < length / 4; count++, address += 4) {
 242                 ret = ath6kl_diag_read32(ar, address, &buf[count]);
 243                 if (ret)
 244                         return ret;
 245         }
 246
 247         return 0;
 248 }
 249
 250 int ath6kl_diag_write(struct ath6kl *ar, u32 address, void *data, u32 length)
 251 {
 252         u32 count;
 253         __le32 *buf = data;
 254         int ret;
 255
 256         if (WARN_ON(length % 4))
 257                 return -EINVAL;
 258
 259         for (count = 0; count < length / 4; count++, address += 4) {
 260                 ret = ath6kl_diag_write32(ar, address, buf[count]);
 261                 if (ret)
 262                         return ret;
 263         }
 264
 265         return 0;
 266 }
 267
 268 int ath6kl_read_fwlogs(struct ath6kl *ar)
 269 {
 270         struct ath6kl_dbglog_hdr debug_hdr;
 271         struct ath6kl_dbglog_buf debug_buf;
 272         u32 address, length, dropped, firstbuf, debug_hdr_addr;
 273         int ret, loop;
 274         u8 *buf;
 275
 276         buf = kmalloc(ATH6KL_FWLOG_PAYLOAD_SIZE, GFP_KERNEL);
 277         if (!buf)
 278                 return -ENOMEM;
 279
 280         address = TARG_VTOP(ar->target_type,
 281                             ath6kl_get_hi_item_addr(ar,
 282                                                     HI_ITEM(hi_dbglog_hdr)));
 283
 284         ret = ath6kl_diag_read32(ar, address, &debug_hdr_addr);
 285         if (ret)
 286                 goto out;
 287
 288         /* Get the contents of the ring buffer */
 289         if (debug_hdr_addr == 0) {
 290                 ath6kl_warn("Invalid address for debug_hdr_addr\n");
 291                 ret = -EINVAL;
 292                 goto out;
 293         }
 294
 295         address = TARG_VTOP(ar->target_type, debug_hdr_addr);
 296         ret = ath6kl_diag_read(ar, address, &debug_hdr, sizeof(debug_hdr));
 297         if (ret)
 298                 goto out;
 299
 300         address = TARG_VTOP(ar->target_type,
 301                             le32_to_cpu(debug_hdr.dbuf_addr));
 302         firstbuf = address;
 303         dropped = le32_to_cpu(debug_hdr.dropped);
 304         ret = ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf));
 305         if (ret)
 306                 goto out;
 307
 308         loop = 100;
 309
 310         do {
 311                 address = TARG_VTOP(ar->target_type,
 312                                     le32_to_cpu(debug_buf.buffer_addr));
 313                 length = le32_to_cpu(debug_buf.length);
 314
 315                 if (length != 0 && (le32_to_cpu(debug_buf.length) <=
 316                                     le32_to_cpu(debug_buf.bufsize))) {
 317                         length = ALIGN(length, 4);
 318
 319                         ret = ath6kl_diag_read(ar, address,
 320                                                buf, length);
 321                         if (ret)
 322                                 goto out;
 323
 324                         ath6kl_debug_fwlog_event(ar, buf, length);
 325                 }
 326
 327                 address = TARG_VTOP(ar->target_type,
 328                                     le32_to_cpu(debug_buf.next));
 329                 ret = ath6kl_diag_read(ar, address, &debug_buf,
 330                                        sizeof(debug_buf));
 331                 if (ret)
 332                         goto out;
 333
 334                 loop--;
 335
 336                 if (WARN_ON(loop == 0)) {
 337                         ret = -ETIMEDOUT;
 338                         goto out;
 339                 }
 340         } while (address != firstbuf);
 341
 342 out:
 343         kfree(buf);
 344
 345         return ret;
 346 }
 347
 348 static void ath6kl_install_static_wep_keys(struct ath6kl_vif *vif)
 349 {
 350         u8 index;
 351         u8 keyusage;
 352
 353         for (index = 0; index <= WMI_MAX_KEY_INDEX; index++) {
 354                 if (vif->wep_key_list[index].key_len) {
 355                         keyusage = GROUP_USAGE;
 356                         if (index == vif->def_txkey_index)
 357                                 keyusage |= TX_USAGE;
 358
 359                         ath6kl_wmi_addkey_cmd(vif->ar->wmi, vif->fw_vif_idx,
 360                                               index,
 361                                               WEP_CRYPT,
 362                                               keyusage,
 363                                               vif->wep_key_list[index].key_len,
 364                                               NULL, 0,
 365                                               vif->wep_key_list[index].key,
 366                                               KEY_OP_INIT_VAL, NULL,
 367                                               NO_SYNC_WMIFLAG);
 368                 }
 369         }
 370 }
 371
 372 void ath6kl_connect_ap_mode_bss(struct ath6kl_vif *vif, u16 channel)
 373 {
 374         struct ath6kl *ar = vif->ar;
 375         struct ath6kl_req_key *ik;
 376         int res;
 377         u8 key_rsc[ATH6KL_KEY_SEQ_LEN];
 378
 379         ik = &ar->ap_mode_bkey;
 380
 381         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "AP mode started on %u MHz\n", channel);
 382
 383         switch (vif->auth_mode) {
 384         case NONE_AUTH:
 385                 if (vif->prwise_crypto == WEP_CRYPT)
 386                         ath6kl_install_static_wep_keys(vif);
 387                 if (!ik->valid || ik->key_type != WAPI_CRYPT)
 388                         break;
 389                 /* for WAPI, we need to set the delayed group key, continue: */
 390         case WPA_PSK_AUTH:
 391         case WPA2_PSK_AUTH:
 392         case (WPA_PSK_AUTH | WPA2_PSK_AUTH):
 393                 if (!ik->valid)
 394                         break;
 395
 396                 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
 397                            "Delayed addkey for the initial group key for AP mode\n");
 398                 memset(key_rsc, 0, sizeof(key_rsc));
 399                 res = ath6kl_wmi_addkey_cmd(
 400                         ar->wmi, vif->fw_vif_idx, ik->key_index, ik->key_type,
 401                         GROUP_USAGE, ik->key_len, key_rsc, ATH6KL_KEY_SEQ_LEN,
 402                         ik->key,
 403                         KEY_OP_INIT_VAL, NULL, SYNC_BOTH_WMIFLAG);
 404                 if (res) {
 405                         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
 406                                    "Delayed addkey failed: %d\n", res);
 407                 }
 408                 break;
 409         }
 410
 411         if (ar->last_ch != channel)
 412                 /* we actually don't know the phymode, default to HT20 */
 413                 ath6kl_cfg80211_ch_switch_notify(vif, channel, WMI_11G_HT20);
 414
 415         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, NONE_BSS_FILTER, 0);
 416         set_bit(CONNECTED, &vif->flags);
 417         netif_carrier_on(vif->ndev);
 418 }
 419
 420 void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr,
 421                                 u8 keymgmt, u8 ucipher, u8 auth,
 422                                 u8 assoc_req_len, u8 *assoc_info, u8 apsd_info)
 423 {
 424         u8 *ies = NULL, *wpa_ie = NULL, *pos;
 425         size_t ies_len = 0;
 426         struct station_info sinfo;
 427
 428         ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid);
 429
 430         if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
 431                 struct ieee80211_mgmt *mgmt =
 432                         (struct ieee80211_mgmt *) assoc_info;
 433                 if (ieee80211_is_assoc_req(mgmt->frame_control) &&
 434                     assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
 435                     sizeof(mgmt->u.assoc_req)) {
 436                         ies = mgmt->u.assoc_req.variable;
 437                         ies_len = assoc_info + assoc_req_len - ies;
 438                 } else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
 439                            assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
 440                            + sizeof(mgmt->u.reassoc_req)) {
 441                         ies = mgmt->u.reassoc_req.variable;
 442                         ies_len = assoc_info + assoc_req_len - ies;
 443                 }
 444         }
 445
 446         pos = ies;
 447         while (pos && pos + 1 < ies + ies_len) {
 448                 if (pos + 2 + pos[1] > ies + ies_len)
 449                         break;
 450                 if (pos[0] == WLAN_EID_RSN)
 451                         wpa_ie = pos; /* RSN IE */
 452                 else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
 453                          pos[1] >= 4 &&
 454                          pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
 455                         if (pos[5] == 0x01)
 456                                 wpa_ie = pos; /* WPA IE */
 457                         else if (pos[5] == 0x04) {
 458                                 wpa_ie = pos; /* WPS IE */
 459                                 break; /* overrides WPA/RSN IE */
 460                         }
 461                 } else if (pos[0] == 0x44 && wpa_ie == NULL) {
 462                         /*
 463                          * Note: WAPI Parameter Set IE re-uses Element ID that
 464                          * was officially allocated for BSS AC Access Delay. As
 465                          * such, we need to be a bit more careful on when
 466                          * parsing the frame. However, BSS AC Access Delay
 467                          * element is not supposed to be included in
 468                          * (Re)Association Request frames, so this should not
 469                          * cause problems.
 470                          */
 471                         wpa_ie = pos; /* WAPI IE */
 472                         break;
 473                 }
 474                 pos += 2 + pos[1];
 475         }
 476
 477         ath6kl_add_new_sta(vif, mac_addr, aid, wpa_ie,
 478                            wpa_ie ? 2 + wpa_ie[1] : 0,
 479                            keymgmt, ucipher, auth, apsd_info);
 480
 481         /* send event to application */
 482         memset(&sinfo, 0, sizeof(sinfo));
 483
 484         /* TODO: sinfo.generation */
 485
 486         sinfo.assoc_req_ies = ies;
 487         sinfo.assoc_req_ies_len = ies_len;
 488         sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
 489
 490         cfg80211_new_sta(vif->ndev, mac_addr, &sinfo, GFP_KERNEL);
 491
 492         netif_wake_queue(vif->ndev);
 493 }
 494
 495 void disconnect_timer_handler(unsigned long ptr)
 496 {
 497         struct net_device *dev = (struct net_device *)ptr;
 498         struct ath6kl_vif *vif = netdev_priv(dev);
 499
 500         ath6kl_init_profile_info(vif);
 501         ath6kl_disconnect(vif);
 502 }
 503
 504 void ath6kl_disconnect(struct ath6kl_vif *vif)
 505 {
 506         if (test_bit(CONNECTED, &vif->flags) ||
 507             test_bit(CONNECT_PEND, &vif->flags)) {
 508                 ath6kl_wmi_disconnect_cmd(vif->ar->wmi, vif->fw_vif_idx);
 509                 /*
 510                  * Disconnect command is issued, clear the connect pending
 511                  * flag. The connected flag will be cleared in
 512                  * disconnect event notification.
 513                  */
 514                 clear_bit(CONNECT_PEND, &vif->flags);
 515         }
 516 }
 517
 518 /* WMI Event handlers */
 519
 520 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver,
 521                         enum wmi_phy_cap cap)
 522 {
 523         struct ath6kl *ar = devt;
 524
 525         memcpy(ar->mac_addr, datap, ETH_ALEN);
 526
 527         ath6kl_dbg(ATH6KL_DBG_BOOT,
 528                    "ready event mac addr %pM sw_ver 0x%x abi_ver 0x%x cap 0x%x\n",
 529                    ar->mac_addr, sw_ver, abi_ver, cap);
 530
 531         ar->version.wlan_ver = sw_ver;
 532         ar->version.abi_ver = abi_ver;
 533         ar->hw.cap = cap;
 534
 535         if (strlen(ar->wiphy->fw_version) == 0) {
 536                 snprintf(ar->wiphy->fw_version,
 537                          sizeof(ar->wiphy->fw_version),
 538                          "%u.%u.%u.%u",
 539                          (ar->version.wlan_ver & 0xf0000000) >> 28,
 540                          (ar->version.wlan_ver & 0x0f000000) >> 24,
 541                          (ar->version.wlan_ver & 0x00ff0000) >> 16,
 542                          (ar->version.wlan_ver & 0x0000ffff));
 543         }
 544
 545         /* indicate to the waiting thread that the ready event was received */
 546         set_bit(WMI_READY, &ar->flag);
 547         wake_up(&ar->event_wq);
 548 }
 549
 550 void ath6kl_scan_complete_evt(struct ath6kl_vif *vif, int status)
 551 {
 552         struct ath6kl *ar = vif->ar;
 553         bool aborted = false;
 554
 555         if (status != WMI_SCAN_STATUS_SUCCESS)
 556                 aborted = true;
 557
 558         ath6kl_cfg80211_scan_complete_event(vif, aborted);
 559
 560         if (!ar->usr_bss_filter) {
 561                 clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
 562                 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
 563                                          NONE_BSS_FILTER, 0);
 564         }
 565
 566         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "scan complete: %d\n", status);
 567 }
 568
 569 static int ath6kl_commit_ch_switch(struct ath6kl_vif *vif, u16 channel)
 570 {
 571
 572         struct ath6kl *ar = vif->ar;
 573
 574         vif->profile.ch = cpu_to_le16(channel);
 575
 576         switch (vif->nw_type) {
 577         case AP_NETWORK:
 578                 /*
 579                  * reconfigure any saved RSN IE capabilites in the beacon /
 580                  * probe response to stay in sync with the supplicant.
 581                  */
 582                 if (vif->rsn_capab &&
 583                     test_bit(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
 584                              ar->fw_capabilities))
 585                         ath6kl_wmi_set_ie_cmd(ar->wmi, vif->fw_vif_idx,
 586                                               WLAN_EID_RSN, WMI_RSN_IE_CAPB,
 587                                               (const u8 *) &vif->rsn_capab,
 588                                               sizeof(vif->rsn_capab));
 589
 590                 return ath6kl_wmi_ap_profile_commit(ar->wmi, vif->fw_vif_idx,
 591                                                     &vif->profile);
 592         default:
 593                 ath6kl_err("won't switch channels nw_type=%d\n", vif->nw_type);
 594                 return -ENOTSUPP;
 595         }
 596 }
 597
 598 static void ath6kl_check_ch_switch(struct ath6kl *ar, u16 channel)
 599 {
 600
 601         struct ath6kl_vif *vif;
 602         int res = 0;
 603
 604         if (!ar->want_ch_switch)
 605                 return;
 606
 607         spin_lock_bh(&ar->list_lock);
 608         list_for_each_entry(vif, &ar->vif_list, list) {
 609                 if (ar->want_ch_switch & (1 << vif->fw_vif_idx))
 610                         res = ath6kl_commit_ch_switch(vif, channel);
 611
 612                 /* if channel switch failed, oh well we tried */
 613                 ar->want_ch_switch &= ~(1 << vif->fw_vif_idx);
 614
 615                 if (res)
 616                         ath6kl_err("channel switch failed nw_type %d res %d\n",
 617                                    vif->nw_type, res);
 618         }
 619         spin_unlock_bh(&ar->list_lock);
 620 }
 621
 622 void ath6kl_connect_event(struct ath6kl_vif *vif, u16 channel, u8 *bssid,
 623                           u16 listen_int, u16 beacon_int,
 624                           enum network_type net_type, u8 beacon_ie_len,
 625                           u8 assoc_req_len, u8 assoc_resp_len,
 626                           u8 *assoc_info)
 627 {
 628         struct ath6kl *ar = vif->ar;
 629
 630         ath6kl_cfg80211_connect_event(vif, channel, bssid,
 631                                       listen_int, beacon_int,
 632                                       net_type, beacon_ie_len,
 633                                       assoc_req_len, assoc_resp_len,
 634                                       assoc_info);
 635
 636         memcpy(vif->bssid, bssid, sizeof(vif->bssid));
 637         vif->bss_ch = channel;
 638
 639         if ((vif->nw_type == INFRA_NETWORK)) {
 640                 ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
 641                                               vif->listen_intvl_t, 0);
 642                 ath6kl_check_ch_switch(ar, channel);
 643         }
 644
 645         netif_wake_queue(vif->ndev);
 646
 647         /* Update connect & link status atomically */
 648         spin_lock_bh(&vif->if_lock);
 649         set_bit(CONNECTED, &vif->flags);
 650         clear_bit(CONNECT_PEND, &vif->flags);
 651         netif_carrier_on(vif->ndev);
 652         spin_unlock_bh(&vif->if_lock);
 653
 654         aggr_reset_state(vif->aggr_cntxt->aggr_conn);
 655         vif->reconnect_flag = 0;
 656
 657         if ((vif->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
 658                 memset(ar->node_map, 0, sizeof(ar->node_map));
 659                 ar->node_num = 0;
 660                 ar->next_ep_id = ENDPOINT_2;
 661         }
 662
 663         if (!ar->usr_bss_filter) {
 664                 set_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
 665                 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
 666                                          CURRENT_BSS_FILTER, 0);
 667         }
 668 }
 669
 670 void ath6kl_tkip_micerr_event(struct ath6kl_vif *vif, u8 keyid, bool ismcast)
 671 {
 672         struct ath6kl_sta *sta;
 673         struct ath6kl *ar = vif->ar;
 674         u8 tsc[6];
 675
 676         /*
 677          * For AP case, keyid will have aid of STA which sent pkt with
 678          * MIC error. Use this aid to get MAC & send it to hostapd.
 679          */
 680         if (vif->nw_type == AP_NETWORK) {
 681                 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
 682                 if (!sta)
 683                         return;
 684
 685                 ath6kl_dbg(ATH6KL_DBG_TRC,
 686                            "ap tkip mic error received from aid=%d\n", keyid);
 687
 688                 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
 689                 cfg80211_michael_mic_failure(vif->ndev, sta->mac,
 690                                              NL80211_KEYTYPE_PAIRWISE, keyid,
 691                                              tsc, GFP_KERNEL);
 692         } else
 693                 ath6kl_cfg80211_tkip_micerr_event(vif, keyid, ismcast);
 694
 695 }
 696
 697 static void ath6kl_update_target_stats(struct ath6kl_vif *vif, u8 *ptr, u32 len)
 698 {
 699         struct wmi_target_stats *tgt_stats =
 700                 (struct wmi_target_stats *) ptr;
 701         struct ath6kl *ar = vif->ar;
 702         struct target_stats *stats = &vif->target_stats;
 703         struct tkip_ccmp_stats *ccmp_stats;
 704         u8 ac;
 705
 706         if (len < sizeof(*tgt_stats))
 707                 return;
 708
 709         ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
 710
 711         stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
 712         stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
 713         stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
 714         stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
 715         stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
 716         stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
 717         stats->tx_bcast_pkt  += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
 718         stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
 719         stats->tx_rts_success_cnt +=
 720                 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
 721
 722         for (ac = 0; ac < WMM_NUM_AC; ac++)
 723                 stats->tx_pkt_per_ac[ac] +=
 724                         le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
 725
 726         stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
 727         stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
 728         stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
 729         stats->tx_mult_retry_cnt +=
 730                 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
 731         stats->tx_rts_fail_cnt +=
 732                 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
 733         stats->tx_ucast_rate =
 734             ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate));
 735
 736         stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
 737         stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
 738         stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
 739         stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
 740         stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
 741         stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
 742         stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
 743         stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
 744         stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
 745         stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
 746         stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
 747         stats->rx_key_cache_miss +=
 748                 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
 749         stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
 750         stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
 751         stats->rx_ucast_rate =
 752             ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate));
 753
 754         ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
 755
 756         stats->tkip_local_mic_fail +=
 757                 le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
 758         stats->tkip_cnter_measures_invoked +=
 759                 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
 760         stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
 761
 762         stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
 763         stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
 764
 765         stats->pwr_save_fail_cnt +=
 766                 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
 767         stats->noise_floor_calib =
 768                 a_sle32_to_cpu(tgt_stats->noise_floor_calib);
 769
 770         stats->cs_bmiss_cnt +=
 771                 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
 772         stats->cs_low_rssi_cnt +=
 773                 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
 774         stats->cs_connect_cnt +=
 775                 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
 776         stats->cs_discon_cnt +=
 777                 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
 778
 779         stats->cs_ave_beacon_rssi =
 780                 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
 781
 782         stats->cs_last_roam_msec =
 783                 tgt_stats->cserv_stats.cs_last_roam_msec;
 784         stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
 785         stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
 786
 787         stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
 788
 789         stats->wow_pkt_dropped +=
 790                 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
 791         stats->wow_host_pkt_wakeups +=
 792                 tgt_stats->wow_stats.wow_host_pkt_wakeups;
 793         stats->wow_host_evt_wakeups +=
 794                 tgt_stats->wow_stats.wow_host_evt_wakeups;
 795         stats->wow_evt_discarded +=
 796                 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
 797
 798         stats->arp_received = le32_to_cpu(tgt_stats->arp_stats.arp_received);
 799         stats->arp_replied = le32_to_cpu(tgt_stats->arp_stats.arp_replied);
 800         stats->arp_matched = le32_to_cpu(tgt_stats->arp_stats.arp_matched);
 801
 802         if (test_bit(STATS_UPDATE_PEND, &vif->flags)) {
 803                 clear_bit(STATS_UPDATE_PEND, &vif->flags);
 804                 wake_up(&ar->event_wq);
 805         }
 806 }
 807
 808 static void ath6kl_add_le32(__le32 *var, __le32 val)
 809 {
 810         *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
 811 }
 812
 813 void ath6kl_tgt_stats_event(struct ath6kl_vif *vif, u8 *ptr, u32 len)
 814 {
 815         struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
 816         struct ath6kl *ar = vif->ar;
 817         struct wmi_ap_mode_stat *ap = &ar->ap_stats;
 818         struct wmi_per_sta_stat *st_ap, *st_p;
 819         u8 ac;
 820
 821         if (vif->nw_type == AP_NETWORK) {
 822                 if (len < sizeof(*p))
 823                         return;
 824
 825                 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
 826                         st_ap = &ap->sta[ac];
 827                         st_p = &p->sta[ac];
 828
 829                         ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
 830                         ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
 831                         ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
 832                         ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
 833                         ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
 834                         ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
 835                         ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
 836                         ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
 837                 }
 838
 839         } else {
 840                 ath6kl_update_target_stats(vif, ptr, len);
 841         }
 842 }
 843
 844 void ath6kl_wakeup_event(void *dev)
 845 {
 846         struct ath6kl *ar = (struct ath6kl *) dev;
 847
 848         wake_up(&ar->event_wq);
 849 }
 850
 851 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
 852 {
 853         struct ath6kl *ar = (struct ath6kl *) devt;
 854
 855         ar->tx_pwr = tx_pwr;
 856         wake_up(&ar->event_wq);
 857 }
 858
 859 void ath6kl_pspoll_event(struct ath6kl_vif *vif, u8 aid)
 860 {
 861         struct ath6kl_sta *conn;
 862         struct sk_buff *skb;
 863         bool psq_empty = false;
 864         struct ath6kl *ar = vif->ar;
 865         struct ath6kl_mgmt_buff *mgmt_buf;
 866
 867         conn = ath6kl_find_sta_by_aid(ar, aid);
 868
 869         if (!conn)
 870                 return;
 871         /*
 872          * Send out a packet queued on ps queue. When the ps queue
 873          * becomes empty update the PVB for this station.
 874          */
 875         spin_lock_bh(&conn->psq_lock);
 876         psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
 877         spin_unlock_bh(&conn->psq_lock);
 878
 879         if (psq_empty)
 880                 /* TODO: Send out a NULL data frame */
 881                 return;
 882
 883         spin_lock_bh(&conn->psq_lock);
 884         if (conn->mgmt_psq_len > 0) {
 885                 mgmt_buf = list_first_entry(&conn->mgmt_psq,
 886                                         struct ath6kl_mgmt_buff, list);
 887                 list_del(&mgmt_buf->list);
 888                 conn->mgmt_psq_len--;
 889                 spin_unlock_bh(&conn->psq_lock);
 890
 891                 conn->sta_flags |= STA_PS_POLLED;
 892                 ath6kl_wmi_send_mgmt_cmd(ar->wmi, vif->fw_vif_idx,
 893                                          mgmt_buf->id, mgmt_buf->freq,
 894                                          mgmt_buf->wait, mgmt_buf->buf,
 895                                          mgmt_buf->len, mgmt_buf->no_cck);
 896                 conn->sta_flags &= ~STA_PS_POLLED;
 897                 kfree(mgmt_buf);
 898         } else {
 899                 skb = skb_dequeue(&conn->psq);
 900                 spin_unlock_bh(&conn->psq_lock);
 901
 902                 conn->sta_flags |= STA_PS_POLLED;
 903                 ath6kl_data_tx(skb, vif->ndev);
 904                 conn->sta_flags &= ~STA_PS_POLLED;
 905         }
 906
 907         spin_lock_bh(&conn->psq_lock);
 908         psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
 909         spin_unlock_bh(&conn->psq_lock);
 910
 911         if (psq_empty)
 912                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, conn->aid, 0);
 913 }
 914
 915 void ath6kl_dtimexpiry_event(struct ath6kl_vif *vif)
 916 {
 917         bool mcastq_empty = false;
 918         struct sk_buff *skb;
 919         struct ath6kl *ar = vif->ar;
 920
 921         /*
 922          * If there are no associated STAs, ignore the DTIM expiry event.
 923          * There can be potential race conditions where the last associated
 924          * STA may disconnect & before the host could clear the 'Indicate
 925          * DTIM' request to the firmware, the firmware would have just
 926          * indicated a DTIM expiry event. The race is between 'clear DTIM
 927          * expiry cmd' going from the host to the firmware & the DTIM
 928          * expiry event happening from the firmware to the host.
 929          */
 930         if (!ar->sta_list_index)
 931                 return;
 932
 933         spin_lock_bh(&ar->mcastpsq_lock);
 934         mcastq_empty = skb_queue_empty(&ar->mcastpsq);
 935         spin_unlock_bh(&ar->mcastpsq_lock);
 936
 937         if (mcastq_empty)
 938                 return;
 939
 940         /* set the STA flag to dtim_expired for the frame to go out */
 941         set_bit(DTIM_EXPIRED, &vif->flags);
 942
 943         spin_lock_bh(&ar->mcastpsq_lock);
 944         while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
 945                 spin_unlock_bh(&ar->mcastpsq_lock);
 946
 947                 ath6kl_data_tx(skb, vif->ndev);
 948
 949                 spin_lock_bh(&ar->mcastpsq_lock);
 950         }
 951         spin_unlock_bh(&ar->mcastpsq_lock);
 952
 953         clear_bit(DTIM_EXPIRED, &vif->flags);
 954
 955         /* clear the LSB of the BitMapCtl field of the TIM IE */
 956         ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, MCAST_AID, 0);
 957 }
 958
 959 void ath6kl_disconnect_event(struct ath6kl_vif *vif, u8 reason, u8 *bssid,
 960                              u8 assoc_resp_len, u8 *assoc_info,
 961                              u16 prot_reason_status)
 962 {
 963         struct ath6kl *ar = vif->ar;
 964
 965         if (vif->nw_type == AP_NETWORK) {
 966                 /* disconnect due to other STA vif switching channels */
 967                 if (reason == BSS_DISCONNECTED &&
 968                     prot_reason_status == WMI_AP_REASON_STA_ROAM) {
 969                         ar->want_ch_switch |= 1 << vif->fw_vif_idx;
 970                         /* bail back to this channel if STA vif fails connect */
 971                         ar->last_ch = le16_to_cpu(vif->profile.ch);
 972                 }
 973
 974                 if (prot_reason_status == WMI_AP_REASON_MAX_STA) {
 975                         /* send max client reached notification to user space */
 976                         cfg80211_conn_failed(vif->ndev, bssid,
 977                                              NL80211_CONN_FAIL_MAX_CLIENTS,
 978                                              GFP_KERNEL);
 979                 }
 980
 981                 if (prot_reason_status == WMI_AP_REASON_ACL) {
 982                         /* send blocked client notification to user space */
 983                         cfg80211_conn_failed(vif->ndev, bssid,
 984                                              NL80211_CONN_FAIL_BLOCKED_CLIENT,
 985                                              GFP_KERNEL);
 986                 }
 987
 988                 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
 989                         return;
 990
 991                 /* if no more associated STAs, empty the mcast PS q */
 992                 if (ar->sta_list_index == 0) {
 993                         spin_lock_bh(&ar->mcastpsq_lock);
 994                         skb_queue_purge(&ar->mcastpsq);
 995                         spin_unlock_bh(&ar->mcastpsq_lock);
 996
 997                         /* clear the LSB of the TIM IE's BitMapCtl field */
 998                         if (test_bit(WMI_READY, &ar->flag))
 999                                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1000                                                        MCAST_AID, 0);
1001                 }
1002
1003                 if (!is_broadcast_ether_addr(bssid)) {
1004                         /* send event to application */
1005                         cfg80211_del_sta(vif->ndev, bssid, GFP_KERNEL);
1006                 }
1007
1008                 if (memcmp(vif->ndev->dev_addr, bssid, ETH_ALEN) == 0) {
1009                         memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
1010                         clear_bit(CONNECTED, &vif->flags);
1011                 }
1012                 return;
1013         }
1014
1015         ath6kl_cfg80211_disconnect_event(vif, reason, bssid,
1016                                          assoc_resp_len, assoc_info,
1017                                          prot_reason_status);
1018
1019         aggr_reset_state(vif->aggr_cntxt->aggr_conn);
1020
1021         del_timer(&vif->disconnect_timer);
1022
1023         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "disconnect reason is %d\n", reason);
1024
1025         /*
1026          * If the event is due to disconnect cmd from the host, only they
1027          * the target would stop trying to connect. Under any other
1028          * condition, target would keep trying to connect.
1029          */
1030         if (reason == DISCONNECT_CMD) {
1031                 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1032                         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
1033                                                  NONE_BSS_FILTER, 0);
1034         } else {
1035                 set_bit(CONNECT_PEND, &vif->flags);
1036                 if (((reason == ASSOC_FAILED) &&
1037                      (prot_reason_status == 0x11)) ||
1038                     ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) &&
1039                      (vif->reconnect_flag == 1))) {
1040                         set_bit(CONNECTED, &vif->flags);
1041                         return;
1042                 }
1043         }
1044
1045         /* restart disconnected concurrent vifs waiting for new channel */
1046         ath6kl_check_ch_switch(ar, ar->last_ch);
1047
1048         /* update connect & link status atomically */
1049         spin_lock_bh(&vif->if_lock);
1050         clear_bit(CONNECTED, &vif->flags);
1051         netif_carrier_off(vif->ndev);
1052         spin_unlock_bh(&vif->if_lock);
1053
1054         if ((reason != CSERV_DISCONNECT) || (vif->reconnect_flag != 1))
1055                 vif->reconnect_flag = 0;
1056
1057         if (reason != CSERV_DISCONNECT)
1058                 ar->user_key_ctrl = 0;
1059
1060         netif_stop_queue(vif->ndev);
1061         memset(vif->bssid, 0, sizeof(vif->bssid));
1062         vif->bss_ch = 0;
1063
1064         ath6kl_tx_data_cleanup(ar);
1065 }
1066
1067 struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar)
1068 {
1069         struct ath6kl_vif *vif;
1070
1071         spin_lock_bh(&ar->list_lock);
1072         if (list_empty(&ar->vif_list)) {
1073                 spin_unlock_bh(&ar->list_lock);
1074                 return NULL;
1075         }
1076
1077         vif = list_first_entry(&ar->vif_list, struct ath6kl_vif, list);
1078
1079         spin_unlock_bh(&ar->list_lock);
1080
1081         return vif;
1082 }
1083
1084 static int ath6kl_open(struct net_device *dev)
1085 {
1086         struct ath6kl_vif *vif = netdev_priv(dev);
1087
1088         set_bit(WLAN_ENABLED, &vif->flags);
1089
1090         if (test_bit(CONNECTED, &vif->flags)) {
1091                 netif_carrier_on(dev);
1092                 netif_wake_queue(dev);
1093         } else
1094                 netif_carrier_off(dev);
1095
1096         return 0;
1097 }
1098
1099 static int ath6kl_close(struct net_device *dev)
1100 {
1101         struct ath6kl_vif *vif = netdev_priv(dev);
1102
1103         netif_stop_queue(dev);
1104
1105         ath6kl_cfg80211_stop(vif);
1106
1107         clear_bit(WLAN_ENABLED, &vif->flags);
1108
1109         return 0;
1110 }
1111
1112 static struct net_device_stats *ath6kl_get_stats(struct net_device *dev)
1113 {
1114         struct ath6kl_vif *vif = netdev_priv(dev);
1115
1116         return &vif->net_stats;
1117 }
1118
1119 static int ath6kl_set_features(struct net_device *dev,
1120                                netdev_features_t features)
1121 {
1122         struct ath6kl_vif *vif = netdev_priv(dev);
1123         struct ath6kl *ar = vif->ar;
1124         int err = 0;
1125
1126         if ((features & NETIF_F_RXCSUM) &&
1127             (ar->rx_meta_ver != WMI_META_VERSION_2)) {
1128                 ar->rx_meta_ver = WMI_META_VERSION_2;
1129                 err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1130                                                          vif->fw_vif_idx,
1131                                                          ar->rx_meta_ver, 0, 0);
1132                 if (err) {
1133                         dev->features = features & ~NETIF_F_RXCSUM;
1134                         return err;
1135                 }
1136         } else if (!(features & NETIF_F_RXCSUM) &&
1137                    (ar->rx_meta_ver == WMI_META_VERSION_2)) {
1138                 ar->rx_meta_ver = 0;
1139                 err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1140                                                          vif->fw_vif_idx,
1141                                                          ar->rx_meta_ver, 0, 0);
1142                 if (err) {
1143                         dev->features = features | NETIF_F_RXCSUM;
1144                         return err;
1145                 }
1146
1147         }
1148
1149         return err;
1150 }
1151
1152 static void ath6kl_set_multicast_list(struct net_device *ndev)
1153 {
1154         struct ath6kl_vif *vif = netdev_priv(ndev);
1155         bool mc_all_on = false;
1156         int mc_count = netdev_mc_count(ndev);
1157         struct netdev_hw_addr *ha;
1158         bool found;
1159         struct ath6kl_mc_filter *mc_filter, *tmp;
1160         struct list_head mc_filter_new;
1161         int ret;
1162
1163         if (!test_bit(WMI_READY, &vif->ar->flag) ||
1164             !test_bit(WLAN_ENABLED, &vif->flags))
1165                 return;
1166
1167         /* Enable multicast-all filter. */
1168         mc_all_on = !!(ndev->flags & IFF_PROMISC) ||
1169                     !!(ndev->flags & IFF_ALLMULTI) ||
1170                     !!(mc_count > ATH6K_MAX_MC_FILTERS_PER_LIST);
1171
1172         if (mc_all_on)
1173                 set_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1174         else
1175                 clear_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1176
1177         if (test_bit(ATH6KL_FW_CAPABILITY_WOW_MULTICAST_FILTER,
1178                      vif->ar->fw_capabilities)) {
1179                 mc_all_on = mc_all_on || (vif->ar->state == ATH6KL_STATE_ON);
1180         }
1181
1182         if (!(ndev->flags & IFF_MULTICAST)) {
1183                 mc_all_on = false;
1184                 set_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1185         } else {
1186                 clear_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1187         }
1188
1189         /* Enable/disable "multicast-all" filter*/
1190         ath6kl_dbg(ATH6KL_DBG_TRC, "%s multicast-all filter\n",
1191                    mc_all_on ? "enabling" : "disabling");
1192
1193         ret = ath6kl_wmi_mcast_filter_cmd(vif->ar->wmi, vif->fw_vif_idx,
1194                                                   mc_all_on);
1195         if (ret) {
1196                 ath6kl_warn("Failed to %s multicast-all receive\n",
1197                             mc_all_on ? "enable" : "disable");
1198                 return;
1199         }
1200
1201         if (test_bit(NETDEV_MCAST_ALL_ON, &vif->flags))
1202                 return;
1203
1204         /* Keep the driver and firmware mcast list in sync. */
1205         list_for_each_entry_safe(mc_filter, tmp, &vif->mc_filter, list) {
1206                 found = false;
1207                 netdev_for_each_mc_addr(ha, ndev) {
1208                         if (memcmp(ha->addr, mc_filter->hw_addr,
1209                                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1210                                 found = true;
1211                                 break;
1212                         }
1213                 }
1214
1215                 if (!found) {
1216                         /*
1217                          * Delete the filter which was previously set
1218                          * but not in the new request.
1219                          */
1220                         ath6kl_dbg(ATH6KL_DBG_TRC,
1221                                    "Removing %pM from multicast filter\n",
1222                                    mc_filter->hw_addr);
1223                         ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1224                                         vif->fw_vif_idx, mc_filter->hw_addr,
1225                                         false);
1226                         if (ret) {
1227                                 ath6kl_warn("Failed to remove multicast filter:%pM\n",
1228                                             mc_filter->hw_addr);
1229                                 return;
1230                         }
1231
1232                         list_del(&mc_filter->list);
1233                         kfree(mc_filter);
1234                 }
1235         }
1236
1237         INIT_LIST_HEAD(&mc_filter_new);
1238
1239         netdev_for_each_mc_addr(ha, ndev) {
1240                 found = false;
1241                 list_for_each_entry(mc_filter, &vif->mc_filter, list) {
1242                         if (memcmp(ha->addr, mc_filter->hw_addr,
1243                                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1244                                 found = true;
1245                                 break;
1246                         }
1247                 }
1248
1249                 if (!found) {
1250                         mc_filter = kzalloc(sizeof(struct ath6kl_mc_filter),
1251                                             GFP_ATOMIC);
1252                         if (!mc_filter) {
1253                                 WARN_ON(1);
1254                                 goto out;
1255                         }
1256
1257                         memcpy(mc_filter->hw_addr, ha->addr,
1258                                ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE);
1259                         /* Set the multicast filter */
1260                         ath6kl_dbg(ATH6KL_DBG_TRC,
1261                                    "Adding %pM to multicast filter list\n",
1262                                    mc_filter->hw_addr);
1263                         ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1264                                         vif->fw_vif_idx, mc_filter->hw_addr,
1265                                         true);
1266                         if (ret) {
1267                                 ath6kl_warn("Failed to add multicast filter :%pM\n",
1268                                             mc_filter->hw_addr);
1269                                 kfree(mc_filter);
1270                                 goto out;
1271                         }
1272
1273                         list_add_tail(&mc_filter->list, &mc_filter_new);
1274                 }
1275         }
1276
1277 out:
1278         list_splice_tail(&mc_filter_new, &vif->mc_filter);
1279 }
1280
1281 static const struct net_device_ops ath6kl_netdev_ops = {
1282         .ndo_open               = ath6kl_open,
1283         .ndo_stop               = ath6kl_close,
1284         .ndo_start_xmit         = ath6kl_data_tx,
1285         .ndo_get_stats          = ath6kl_get_stats,
1286         .ndo_set_features       = ath6kl_set_features,
1287         .ndo_set_rx_mode        = ath6kl_set_multicast_list,
1288 };
1289
1290 void init_netdev(struct net_device *dev)
1291 {
1292         dev->netdev_ops = &ath6kl_netdev_ops;
1293         dev->destructor = free_netdev;
1294         dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1295
1296         dev->needed_headroom = ETH_HLEN;
1297         dev->needed_headroom += roundup(sizeof(struct ath6kl_llc_snap_hdr) +
1298                                         sizeof(struct wmi_data_hdr) +
1299                                         HTC_HDR_LENGTH +
1300                                         WMI_MAX_TX_META_SZ +
1301                                         ATH6KL_HTC_ALIGN_BYTES, 4);
1302
1303         dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1304
1305         return;
1306 }