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         if (is_zero_ether_addr(node_addr))
  33                 return NULL;
  34
  35         max_conn = (vif->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;
  36
  37         for (i = 0; i < max_conn; i++) {
  38                 if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
  39                         conn = &ar->sta_list[i];
  40                         break;
  41                 }
  42         }
  43
  44         return conn;
  45 }
  46
  47 struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
  48 {
  49         struct ath6kl_sta *conn = NULL;
  50         u8 ctr;
  51
  52         for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
  53                 if (ar->sta_list[ctr].aid == aid) {
  54                         conn = &ar->sta_list[ctr];
  55                         break;
  56                 }
  57         }
  58         return conn;
  59 }
  60
  61 static void ath6kl_add_new_sta(struct ath6kl_vif *vif, u8 *mac, u16 aid,
  62                                u8 *wpaie, size_t ielen, u8 keymgmt,
  63                                u8 ucipher, u8 auth, u8 apsd_info)
  64 {
  65         struct ath6kl *ar = vif->ar;
  66         struct ath6kl_sta *sta;
  67         u8 free_slot;
  68
  69         free_slot = aid - 1;
  70
  71         sta = &ar->sta_list[free_slot];
  72         memcpy(sta->mac, mac, ETH_ALEN);
  73         if (ielen <= ATH6KL_MAX_IE)
  74                 memcpy(sta->wpa_ie, wpaie, ielen);
  75         sta->aid = aid;
  76         sta->keymgmt = keymgmt;
  77         sta->ucipher = ucipher;
  78         sta->auth = auth;
  79         sta->apsd_info = apsd_info;
  80
  81         ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
  82         ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
  83         aggr_conn_init(vif, vif->aggr_cntxt, sta->aggr_conn);
  84 }
  85
  86 static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
  87 {
  88         struct ath6kl_sta *sta = &ar->sta_list[i];
  89         struct ath6kl_mgmt_buff *entry, *tmp;
  90
  91         /* empty the queued pkts in the PS queue if any */
  92         spin_lock_bh(&sta->psq_lock);
  93         skb_queue_purge(&sta->psq);
  94         skb_queue_purge(&sta->apsdq);
  95
  96         if (sta->mgmt_psq_len != 0) {
  97                 list_for_each_entry_safe(entry, tmp, &sta->mgmt_psq, list) {
  98                         kfree(entry);
  99                 }
 100                 INIT_LIST_HEAD(&sta->mgmt_psq);
 101                 sta->mgmt_psq_len = 0;
 102         }
 103
 104         spin_unlock_bh(&sta->psq_lock);
 105
 106         memset(&ar->ap_stats.sta[sta->aid - 1], 0,
 107                sizeof(struct wmi_per_sta_stat));
 108         eth_zero_addr(sta->mac);
 109         memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
 110         sta->aid = 0;
 111         sta->sta_flags = 0;
 112
 113         ar->sta_list_index = ar->sta_list_index & ~(1 << i);
 114         aggr_reset_state(sta->aggr_conn);
 115 }
 116
 117 static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
 118 {
 119         u8 i, removed = 0;
 120
 121         if (is_zero_ether_addr(mac))
 122                 return removed;
 123
 124         if (is_broadcast_ether_addr(mac)) {
 125                 ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");
 126
 127                 for (i = 0; i < AP_MAX_NUM_STA; i++) {
 128                         if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
 129                                 ath6kl_sta_cleanup(ar, i);
 130                                 removed = 1;
 131                         }
 132                 }
 133         } else {
 134                 for (i = 0; i < AP_MAX_NUM_STA; i++) {
 135                         if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
 136                                 ath6kl_dbg(ATH6KL_DBG_TRC,
 137                                            "deleting station %pM aid=%d reason=%d\n",
 138                                            mac, ar->sta_list[i].aid, reason);
 139                                 ath6kl_sta_cleanup(ar, i);
 140                                 removed = 1;
 141                                 break;
 142                         }
 143                 }
 144         }
 145
 146         return removed;
 147 }
 148
 149 enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
 150 {
 151         struct ath6kl *ar = devt;
 152         return ar->ac2ep_map[ac];
 153 }
 154
 155 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
 156 {
 157         struct ath6kl_cookie *cookie;
 158
 159         cookie = ar->cookie_list;
 160         if (cookie != NULL) {
 161                 ar->cookie_list = cookie->arc_list_next;
 162                 ar->cookie_count--;
 163         }
 164
 165         return cookie;
 166 }
 167
 168 void ath6kl_cookie_init(struct ath6kl *ar)
 169 {
 170         u32 i;
 171
 172         ar->cookie_list = NULL;
 173         ar->cookie_count = 0;
 174
 175         memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));
 176
 177         for (i = 0; i < MAX_COOKIE_NUM; i++)
 178                 ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
 179 }
 180
 181 void ath6kl_cookie_cleanup(struct ath6kl *ar)
 182 {
 183         ar->cookie_list = NULL;
 184         ar->cookie_count = 0;
 185 }
 186
 187 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
 188 {
 189         /* Insert first */
 190
 191         if (!ar || !cookie)
 192                 return;
 193
 194         cookie->arc_list_next = ar->cookie_list;
 195         ar->cookie_list = cookie;
 196         ar->cookie_count++;
 197 }
 198
 199 /*
 200  * Read from the hardware through its diagnostic window. No cooperation
 201  * from the firmware is required for this.
 202  */
 203 int ath6kl_diag_read32(struct ath6kl *ar, u32 address, u32 *value)
 204 {
 205         int ret;
 206
 207         ret = ath6kl_hif_diag_read32(ar, address, value);
 208         if (ret) {
 209                 ath6kl_warn("failed to read32 through diagnose window: %d\n",
 210                             ret);
 211                 return ret;
 212         }
 213
 214         return 0;
 215 }
 216
 217 /*
 218  * Write to the ATH6KL through its diagnostic window. No cooperation from
 219  * the Target is required for this.
 220  */
 221 int ath6kl_diag_write32(struct ath6kl *ar, u32 address, __le32 value)
 222 {
 223         int ret;
 224
 225         ret = ath6kl_hif_diag_write32(ar, address, value);
 226
 227         if (ret) {
 228                 ath6kl_err("failed to write 0x%x during diagnose window to 0x%x\n",
 229                            address, value);
 230                 return ret;
 231         }
 232
 233         return 0;
 234 }
 235
 236 int ath6kl_diag_read(struct ath6kl *ar, u32 address, void *data, u32 length)
 237 {
 238         u32 count, *buf = data;
 239         int ret;
 240
 241         if (WARN_ON(length % 4))
 242                 return -EINVAL;
 243
 244         for (count = 0; count < length / 4; count++, address += 4) {
 245                 ret = ath6kl_diag_read32(ar, address, &buf[count]);
 246                 if (ret)
 247                         return ret;
 248         }
 249
 250         return 0;
 251 }
 252
 253 int ath6kl_diag_write(struct ath6kl *ar, u32 address, void *data, u32 length)
 254 {
 255         u32 count;
 256         __le32 *buf = data;
 257         int ret;
 258
 259         if (WARN_ON(length % 4))
 260                 return -EINVAL;
 261
 262         for (count = 0; count < length / 4; count++, address += 4) {
 263                 ret = ath6kl_diag_write32(ar, address, buf[count]);
 264                 if (ret)
 265                         return ret;
 266         }
 267
 268         return 0;
 269 }
 270
 271 int ath6kl_read_fwlogs(struct ath6kl *ar)
 272 {
 273         struct ath6kl_dbglog_hdr debug_hdr;
 274         struct ath6kl_dbglog_buf debug_buf;
 275         u32 address, length, firstbuf, debug_hdr_addr;
 276         int ret, loop;
 277         u8 *buf;
 278
 279         buf = kmalloc(ATH6KL_FWLOG_PAYLOAD_SIZE, GFP_KERNEL);
 280         if (!buf)
 281                 return -ENOMEM;
 282
 283         address = TARG_VTOP(ar->target_type,
 284                             ath6kl_get_hi_item_addr(ar,
 285                                                     HI_ITEM(hi_dbglog_hdr)));
 286
 287         ret = ath6kl_diag_read32(ar, address, &debug_hdr_addr);
 288         if (ret)
 289                 goto out;
 290
 291         /* Get the contents of the ring buffer */
 292         if (debug_hdr_addr == 0) {
 293                 ath6kl_warn("Invalid address for debug_hdr_addr\n");
 294                 ret = -EINVAL;
 295                 goto out;
 296         }
 297
 298         address = TARG_VTOP(ar->target_type, debug_hdr_addr);
 299         ret = ath6kl_diag_read(ar, address, &debug_hdr, sizeof(debug_hdr));
 300         if (ret)
 301                 goto out;
 302
 303         address = TARG_VTOP(ar->target_type,
 304                             le32_to_cpu(debug_hdr.dbuf_addr));
 305         firstbuf = address;
 306         ret = ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf));
 307         if (ret)
 308                 goto out;
 309
 310         loop = 100;
 311
 312         do {
 313                 address = TARG_VTOP(ar->target_type,
 314                                     le32_to_cpu(debug_buf.buffer_addr));
 315                 length = le32_to_cpu(debug_buf.length);
 316
 317                 if (length != 0 && (le32_to_cpu(debug_buf.length) <=
 318                                     le32_to_cpu(debug_buf.bufsize))) {
 319                         length = ALIGN(length, 4);
 320
 321                         ret = ath6kl_diag_read(ar, address,
 322                                                buf, length);
 323                         if (ret)
 324                                 goto out;
 325
 326                         ath6kl_debug_fwlog_event(ar, buf, length);
 327                 }
 328
 329                 address = TARG_VTOP(ar->target_type,
 330                                     le32_to_cpu(debug_buf.next));
 331                 ret = ath6kl_diag_read(ar, address, &debug_buf,
 332                                        sizeof(debug_buf));
 333                 if (ret)
 334                         goto out;
 335
 336                 loop--;
 337
 338                 if (WARN_ON(loop == 0)) {
 339                         ret = -ETIMEDOUT;
 340                         goto out;
 341                 }
 342         } while (address != firstbuf);
 343
 344 out:
 345         kfree(buf);
 346
 347         return ret;
 348 }
 349
 350 static void ath6kl_install_static_wep_keys(struct ath6kl_vif *vif)
 351 {
 352         u8 index;
 353         u8 keyusage;
 354
 355         for (index = 0; index <= WMI_MAX_KEY_INDEX; index++) {
 356                 if (vif->wep_key_list[index].key_len) {
 357                         keyusage = GROUP_USAGE;
 358                         if (index == vif->def_txkey_index)
 359                                 keyusage |= TX_USAGE;
 360
 361                         ath6kl_wmi_addkey_cmd(vif->ar->wmi, vif->fw_vif_idx,
 362                                               index,
 363                                               WEP_CRYPT,
 364                                               keyusage,
 365                                               vif->wep_key_list[index].key_len,
 366                                               NULL, 0,
 367                                               vif->wep_key_list[index].key,
 368                                               KEY_OP_INIT_VAL, NULL,
 369                                               NO_SYNC_WMIFLAG);
 370                 }
 371         }
 372 }
 373
 374 void ath6kl_connect_ap_mode_bss(struct ath6kl_vif *vif, u16 channel)
 375 {
 376         struct ath6kl *ar = vif->ar;
 377         struct ath6kl_req_key *ik;
 378         int res;
 379         u8 key_rsc[ATH6KL_KEY_SEQ_LEN];
 380
 381         ik = &ar->ap_mode_bkey;
 382
 383         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "AP mode started on %u MHz\n", channel);
 384
 385         switch (vif->auth_mode) {
 386         case NONE_AUTH:
 387                 if (vif->prwise_crypto == WEP_CRYPT)
 388                         ath6kl_install_static_wep_keys(vif);
 389                 if (!ik->valid || ik->key_type != WAPI_CRYPT)
 390                         break;
 391                 /* for WAPI, we need to set the delayed group key, continue: */
 392                 fallthrough;
 393         case WPA_PSK_AUTH:
 394         case WPA2_PSK_AUTH:
 395         case (WPA_PSK_AUTH | WPA2_PSK_AUTH):
 396                 if (!ik->valid)
 397                         break;
 398
 399                 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
 400                            "Delayed addkey for the initial group key for AP mode\n");
 401                 memset(key_rsc, 0, sizeof(key_rsc));
 402                 res = ath6kl_wmi_addkey_cmd(
 403                         ar->wmi, vif->fw_vif_idx, ik->key_index, ik->key_type,
 404                         GROUP_USAGE, ik->key_len, key_rsc, ATH6KL_KEY_SEQ_LEN,
 405                         ik->key,
 406                         KEY_OP_INIT_VAL, NULL, SYNC_BOTH_WMIFLAG);
 407                 if (res) {
 408                         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
 409                                    "Delayed addkey failed: %d\n", res);
 410                 }
 411                 break;
 412         }
 413
 414         if (ar->last_ch != channel)
 415                 /* we actually don't know the phymode, default to HT20 */
 416                 ath6kl_cfg80211_ch_switch_notify(vif, channel, WMI_11G_HT20);
 417
 418         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, NONE_BSS_FILTER, 0);
 419         set_bit(CONNECTED, &vif->flags);
 420         netif_carrier_on(vif->ndev);
 421 }
 422
 423 void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr,
 424                                 u8 keymgmt, u8 ucipher, u8 auth,
 425                                 u8 assoc_req_len, u8 *assoc_info, u8 apsd_info)
 426 {
 427         u8 *ies = NULL, *wpa_ie = NULL, *pos;
 428         size_t ies_len = 0;
 429         struct station_info *sinfo;
 430
 431         ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid);
 432
 433         if (aid < 1 || aid > AP_MAX_NUM_STA)
 434                 return;
 435
 436         if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
 437                 struct ieee80211_mgmt *mgmt =
 438                         (struct ieee80211_mgmt *) assoc_info;
 439                 if (ieee80211_is_assoc_req(mgmt->frame_control) &&
 440                     assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
 441                     sizeof(mgmt->u.assoc_req)) {
 442                         ies = mgmt->u.assoc_req.variable;
 443                         ies_len = assoc_info + assoc_req_len - ies;
 444                 } else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
 445                            assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
 446                            + sizeof(mgmt->u.reassoc_req)) {
 447                         ies = mgmt->u.reassoc_req.variable;
 448                         ies_len = assoc_info + assoc_req_len - ies;
 449                 }
 450         }
 451
 452         pos = ies;
 453         while (pos && pos + 1 < ies + ies_len) {
 454                 if (pos + 2 + pos[1] > ies + ies_len)
 455                         break;
 456                 if (pos[0] == WLAN_EID_RSN)
 457                         wpa_ie = pos; /* RSN IE */
 458                 else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
 459                          pos[1] >= 4 &&
 460                          pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
 461                         if (pos[5] == 0x01)
 462                                 wpa_ie = pos; /* WPA IE */
 463                         else if (pos[5] == 0x04) {
 464                                 wpa_ie = pos; /* WPS IE */
 465                                 break; /* overrides WPA/RSN IE */
 466                         }
 467                 } else if (pos[0] == 0x44 && wpa_ie == NULL) {
 468                         /*
 469                          * Note: WAPI Parameter Set IE re-uses Element ID that
 470                          * was officially allocated for BSS AC Access Delay. As
 471                          * such, we need to be a bit more careful on when
 472                          * parsing the frame. However, BSS AC Access Delay
 473                          * element is not supposed to be included in
 474                          * (Re)Association Request frames, so this should not
 475                          * cause problems.
 476                          */
 477                         wpa_ie = pos; /* WAPI IE */
 478                         break;
 479                 }
 480                 pos += 2 + pos[1];
 481         }
 482
 483         ath6kl_add_new_sta(vif, mac_addr, aid, wpa_ie,
 484                            wpa_ie ? 2 + wpa_ie[1] : 0,
 485                            keymgmt, ucipher, auth, apsd_info);
 486
 487         /* send event to application */
 488         sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
 489         if (!sinfo)
 490                 return;
 491
 492         /* TODO: sinfo.generation */
 493
 494         sinfo->assoc_req_ies = ies;
 495         sinfo->assoc_req_ies_len = ies_len;
 496
 497         cfg80211_new_sta(vif->ndev, mac_addr, sinfo, GFP_KERNEL);
 498
 499         netif_wake_queue(vif->ndev);
 500
 501         kfree(sinfo);
 502 }
 503
 504 void disconnect_timer_handler(struct timer_list *t)
 505 {
 506         struct ath6kl_vif *vif = from_timer(vif, t, disconnect_timer);
 507
 508         ath6kl_init_profile_info(vif);
 509         ath6kl_disconnect(vif);
 510 }
 511
 512 void ath6kl_disconnect(struct ath6kl_vif *vif)
 513 {
 514         if (test_bit(CONNECTED, &vif->flags) ||
 515             test_bit(CONNECT_PEND, &vif->flags)) {
 516                 ath6kl_wmi_disconnect_cmd(vif->ar->wmi, vif->fw_vif_idx);
 517                 /*
 518                  * Disconnect command is issued, clear the connect pending
 519                  * flag. The connected flag will be cleared in
 520                  * disconnect event notification.
 521                  */
 522                 clear_bit(CONNECT_PEND, &vif->flags);
 523         }
 524 }
 525
 526 /* WMI Event handlers */
 527
 528 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver,
 529                         enum wmi_phy_cap cap)
 530 {
 531         struct ath6kl *ar = devt;
 532
 533         memcpy(ar->mac_addr, datap, ETH_ALEN);
 534
 535         ath6kl_dbg(ATH6KL_DBG_BOOT,
 536                    "ready event mac addr %pM sw_ver 0x%x abi_ver 0x%x cap 0x%x\n",
 537                    ar->mac_addr, sw_ver, abi_ver, cap);
 538
 539         ar->version.wlan_ver = sw_ver;
 540         ar->version.abi_ver = abi_ver;
 541         ar->hw.cap = cap;
 542
 543         if (strlen(ar->wiphy->fw_version) == 0) {
 544                 snprintf(ar->wiphy->fw_version,
 545                          sizeof(ar->wiphy->fw_version),
 546                          "%u.%u.%u.%u",
 547                          (ar->version.wlan_ver & 0xf0000000) >> 28,
 548                          (ar->version.wlan_ver & 0x0f000000) >> 24,
 549                          (ar->version.wlan_ver & 0x00ff0000) >> 16,
 550                          (ar->version.wlan_ver & 0x0000ffff));
 551         }
 552
 553         /* indicate to the waiting thread that the ready event was received */
 554         set_bit(WMI_READY, &ar->flag);
 555         wake_up(&ar->event_wq);
 556 }
 557
 558 void ath6kl_scan_complete_evt(struct ath6kl_vif *vif, int status)
 559 {
 560         struct ath6kl *ar = vif->ar;
 561         bool aborted = false;
 562
 563         if (status != WMI_SCAN_STATUS_SUCCESS)
 564                 aborted = true;
 565
 566         ath6kl_cfg80211_scan_complete_event(vif, aborted);
 567
 568         if (!ar->usr_bss_filter) {
 569                 clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
 570                 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
 571                                          NONE_BSS_FILTER, 0);
 572         }
 573
 574         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "scan complete: %d\n", status);
 575 }
 576
 577 static int ath6kl_commit_ch_switch(struct ath6kl_vif *vif, u16 channel)
 578 {
 579         struct ath6kl *ar = vif->ar;
 580
 581         vif->profile.ch = cpu_to_le16(channel);
 582
 583         switch (vif->nw_type) {
 584         case AP_NETWORK:
 585                 /*
 586                  * reconfigure any saved RSN IE capabilites in the beacon /
 587                  * probe response to stay in sync with the supplicant.
 588                  */
 589                 if (vif->rsn_capab &&
 590                     test_bit(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
 591                              ar->fw_capabilities))
 592                         ath6kl_wmi_set_ie_cmd(ar->wmi, vif->fw_vif_idx,
 593                                               WLAN_EID_RSN, WMI_RSN_IE_CAPB,
 594                                               (const u8 *) &vif->rsn_capab,
 595                                               sizeof(vif->rsn_capab));
 596
 597                 return ath6kl_wmi_ap_profile_commit(ar->wmi, vif->fw_vif_idx,
 598                                                     &vif->profile);
 599         default:
 600                 ath6kl_err("won't switch channels nw_type=%d\n", vif->nw_type);
 601                 return -ENOTSUPP;
 602         }
 603 }
 604
 605 static void ath6kl_check_ch_switch(struct ath6kl *ar, u16 channel)
 606 {
 607         struct ath6kl_vif *vif;
 608         int res = 0;
 609
 610         if (!ar->want_ch_switch)
 611                 return;
 612
 613         spin_lock_bh(&ar->list_lock);
 614         list_for_each_entry(vif, &ar->vif_list, list) {
 615                 if (ar->want_ch_switch & (1 << vif->fw_vif_idx))
 616                         res = ath6kl_commit_ch_switch(vif, channel);
 617
 618                 /* if channel switch failed, oh well we tried */
 619                 ar->want_ch_switch &= ~(1 << vif->fw_vif_idx);
 620
 621                 if (res)
 622                         ath6kl_err("channel switch failed nw_type %d res %d\n",
 623                                    vif->nw_type, res);
 624         }
 625         spin_unlock_bh(&ar->list_lock);
 626 }
 627
 628 void ath6kl_connect_event(struct ath6kl_vif *vif, u16 channel, u8 *bssid,
 629                           u16 listen_int, u16 beacon_int,
 630                           enum network_type net_type, u8 beacon_ie_len,
 631                           u8 assoc_req_len, u8 assoc_resp_len,
 632                           u8 *assoc_info)
 633 {
 634         struct ath6kl *ar = vif->ar;
 635
 636         ath6kl_cfg80211_connect_event(vif, channel, bssid,
 637                                       listen_int, beacon_int,
 638                                       net_type, beacon_ie_len,
 639                                       assoc_req_len, assoc_resp_len,
 640                                       assoc_info);
 641
 642         memcpy(vif->bssid, bssid, sizeof(vif->bssid));
 643         vif->bss_ch = channel;
 644
 645         if (vif->nw_type == INFRA_NETWORK) {
 646                 ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
 647                                               vif->listen_intvl_t, 0);
 648                 ath6kl_check_ch_switch(ar, channel);
 649         }
 650
 651         netif_wake_queue(vif->ndev);
 652
 653         /* Update connect & link status atomically */
 654         spin_lock_bh(&vif->if_lock);
 655         set_bit(CONNECTED, &vif->flags);
 656         clear_bit(CONNECT_PEND, &vif->flags);
 657         netif_carrier_on(vif->ndev);
 658         spin_unlock_bh(&vif->if_lock);
 659
 660         aggr_reset_state(vif->aggr_cntxt->aggr_conn);
 661         vif->reconnect_flag = 0;
 662
 663         if ((vif->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
 664                 memset(ar->node_map, 0, sizeof(ar->node_map));
 665                 ar->node_num = 0;
 666                 ar->next_ep_id = ENDPOINT_2;
 667         }
 668
 669         if (!ar->usr_bss_filter) {
 670                 set_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
 671                 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
 672                                          CURRENT_BSS_FILTER, 0);
 673         }
 674 }
 675
 676 void ath6kl_tkip_micerr_event(struct ath6kl_vif *vif, u8 keyid, bool ismcast)
 677 {
 678         struct ath6kl_sta *sta;
 679         struct ath6kl *ar = vif->ar;
 680         u8 tsc[6];
 681
 682         /*
 683          * For AP case, keyid will have aid of STA which sent pkt with
 684          * MIC error. Use this aid to get MAC & send it to hostapd.
 685          */
 686         if (vif->nw_type == AP_NETWORK) {
 687                 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
 688                 if (!sta)
 689                         return;
 690
 691                 ath6kl_dbg(ATH6KL_DBG_TRC,
 692                            "ap tkip mic error received from aid=%d\n", keyid);
 693
 694                 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
 695                 cfg80211_michael_mic_failure(vif->ndev, sta->mac,
 696                                              NL80211_KEYTYPE_PAIRWISE, keyid,
 697                                              tsc, GFP_KERNEL);
 698         } else {
 699                 ath6kl_cfg80211_tkip_micerr_event(vif, keyid, ismcast);
 700         }
 701 }
 702
 703 static void ath6kl_update_target_stats(struct ath6kl_vif *vif, u8 *ptr, u32 len)
 704 {
 705         struct wmi_target_stats *tgt_stats =
 706                 (struct wmi_target_stats *) ptr;
 707         struct ath6kl *ar = vif->ar;
 708         struct target_stats *stats = &vif->target_stats;
 709         struct tkip_ccmp_stats *ccmp_stats;
 710         s32 rate;
 711         u8 ac;
 712
 713         if (len < sizeof(*tgt_stats))
 714                 return;
 715
 716         ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
 717
 718         stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
 719         stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
 720         stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
 721         stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
 722         stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
 723         stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
 724         stats->tx_bcast_pkt  += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
 725         stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
 726         stats->tx_rts_success_cnt +=
 727                 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
 728
 729         for (ac = 0; ac < WMM_NUM_AC; ac++)
 730                 stats->tx_pkt_per_ac[ac] +=
 731                         le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
 732
 733         stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
 734         stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
 735         stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
 736         stats->tx_mult_retry_cnt +=
 737                 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
 738         stats->tx_rts_fail_cnt +=
 739                 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
 740
 741         rate = a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate);
 742         stats->tx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
 743
 744         stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
 745         stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
 746         stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
 747         stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
 748         stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
 749         stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
 750         stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
 751         stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
 752         stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
 753         stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
 754         stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
 755         stats->rx_key_cache_miss +=
 756                 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
 757         stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
 758         stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
 759
 760         rate = a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate);
 761         stats->rx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
 762
 763         ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
 764
 765         stats->tkip_local_mic_fail +=
 766                 le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
 767         stats->tkip_cnter_measures_invoked +=
 768                 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
 769         stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
 770
 771         stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
 772         stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
 773
 774         stats->pwr_save_fail_cnt +=
 775                 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
 776         stats->noise_floor_calib =
 777                 a_sle32_to_cpu(tgt_stats->noise_floor_calib);
 778
 779         stats->cs_bmiss_cnt +=
 780                 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
 781         stats->cs_low_rssi_cnt +=
 782                 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
 783         stats->cs_connect_cnt +=
 784                 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
 785         stats->cs_discon_cnt +=
 786                 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
 787
 788         stats->cs_ave_beacon_rssi =
 789                 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
 790
 791         stats->cs_last_roam_msec =
 792                 tgt_stats->cserv_stats.cs_last_roam_msec;
 793         stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
 794         stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
 795
 796         stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
 797
 798         stats->wow_pkt_dropped +=
 799                 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
 800         stats->wow_host_pkt_wakeups +=
 801                 tgt_stats->wow_stats.wow_host_pkt_wakeups;
 802         stats->wow_host_evt_wakeups +=
 803                 tgt_stats->wow_stats.wow_host_evt_wakeups;
 804         stats->wow_evt_discarded +=
 805                 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
 806
 807         stats->arp_received = le32_to_cpu(tgt_stats->arp_stats.arp_received);
 808         stats->arp_replied = le32_to_cpu(tgt_stats->arp_stats.arp_replied);
 809         stats->arp_matched = le32_to_cpu(tgt_stats->arp_stats.arp_matched);
 810
 811         if (test_bit(STATS_UPDATE_PEND, &vif->flags)) {
 812                 clear_bit(STATS_UPDATE_PEND, &vif->flags);
 813                 wake_up(&ar->event_wq);
 814         }
 815 }
 816
 817 static void ath6kl_add_le32(__le32 *var, __le32 val)
 818 {
 819         *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
 820 }
 821
 822 void ath6kl_tgt_stats_event(struct ath6kl_vif *vif, u8 *ptr, u32 len)
 823 {
 824         struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
 825         struct ath6kl *ar = vif->ar;
 826         struct wmi_ap_mode_stat *ap = &ar->ap_stats;
 827         struct wmi_per_sta_stat *st_ap, *st_p;
 828         u8 ac;
 829
 830         if (vif->nw_type == AP_NETWORK) {
 831                 if (len < sizeof(*p))
 832                         return;
 833
 834                 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
 835                         st_ap = &ap->sta[ac];
 836                         st_p = &p->sta[ac];
 837
 838                         ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
 839                         ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
 840                         ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
 841                         ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
 842                         ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
 843                         ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
 844                         ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
 845                         ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
 846                 }
 847
 848         } else {
 849                 ath6kl_update_target_stats(vif, ptr, len);
 850         }
 851 }
 852
 853 void ath6kl_wakeup_event(void *dev)
 854 {
 855         struct ath6kl *ar = dev;
 856
 857         wake_up(&ar->event_wq);
 858 }
 859
 860 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
 861 {
 862         struct ath6kl *ar = devt;
 863
 864         ar->tx_pwr = tx_pwr;
 865         wake_up(&ar->event_wq);
 866 }
 867
 868 void ath6kl_pspoll_event(struct ath6kl_vif *vif, u8 aid)
 869 {
 870         struct ath6kl_sta *conn;
 871         struct sk_buff *skb;
 872         bool psq_empty = false;
 873         struct ath6kl *ar = vif->ar;
 874         struct ath6kl_mgmt_buff *mgmt_buf;
 875
 876         conn = ath6kl_find_sta_by_aid(ar, aid);
 877
 878         if (!conn)
 879                 return;
 880         /*
 881          * Send out a packet queued on ps queue. When the ps queue
 882          * becomes empty update the PVB for this station.
 883          */
 884         spin_lock_bh(&conn->psq_lock);
 885         psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
 886         spin_unlock_bh(&conn->psq_lock);
 887
 888         if (psq_empty)
 889                 /* TODO: Send out a NULL data frame */
 890                 return;
 891
 892         spin_lock_bh(&conn->psq_lock);
 893         if (conn->mgmt_psq_len > 0) {
 894                 mgmt_buf = list_first_entry(&conn->mgmt_psq,
 895                                         struct ath6kl_mgmt_buff, list);
 896                 list_del(&mgmt_buf->list);
 897                 conn->mgmt_psq_len--;
 898                 spin_unlock_bh(&conn->psq_lock);
 899
 900                 conn->sta_flags |= STA_PS_POLLED;
 901                 ath6kl_wmi_send_mgmt_cmd(ar->wmi, vif->fw_vif_idx,
 902                                          mgmt_buf->id, mgmt_buf->freq,
 903                                          mgmt_buf->wait, mgmt_buf->buf,
 904                                          mgmt_buf->len, mgmt_buf->no_cck);
 905                 conn->sta_flags &= ~STA_PS_POLLED;
 906                 kfree(mgmt_buf);
 907         } else {
 908                 skb = skb_dequeue(&conn->psq);
 909                 spin_unlock_bh(&conn->psq_lock);
 910
 911                 conn->sta_flags |= STA_PS_POLLED;
 912                 ath6kl_data_tx(skb, vif->ndev);
 913                 conn->sta_flags &= ~STA_PS_POLLED;
 914         }
 915
 916         spin_lock_bh(&conn->psq_lock);
 917         psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
 918         spin_unlock_bh(&conn->psq_lock);
 919
 920         if (psq_empty)
 921                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, conn->aid, 0);
 922 }
 923
 924 void ath6kl_dtimexpiry_event(struct ath6kl_vif *vif)
 925 {
 926         bool mcastq_empty = false;
 927         struct sk_buff *skb;
 928         struct ath6kl *ar = vif->ar;
 929
 930         /*
 931          * If there are no associated STAs, ignore the DTIM expiry event.
 932          * There can be potential race conditions where the last associated
 933          * STA may disconnect & before the host could clear the 'Indicate
 934          * DTIM' request to the firmware, the firmware would have just
 935          * indicated a DTIM expiry event. The race is between 'clear DTIM
 936          * expiry cmd' going from the host to the firmware & the DTIM
 937          * expiry event happening from the firmware to the host.
 938          */
 939         if (!ar->sta_list_index)
 940                 return;
 941
 942         spin_lock_bh(&ar->mcastpsq_lock);
 943         mcastq_empty = skb_queue_empty(&ar->mcastpsq);
 944         spin_unlock_bh(&ar->mcastpsq_lock);
 945
 946         if (mcastq_empty)
 947                 return;
 948
 949         /* set the STA flag to dtim_expired for the frame to go out */
 950         set_bit(DTIM_EXPIRED, &vif->flags);
 951
 952         spin_lock_bh(&ar->mcastpsq_lock);
 953         while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
 954                 spin_unlock_bh(&ar->mcastpsq_lock);
 955
 956                 ath6kl_data_tx(skb, vif->ndev);
 957
 958                 spin_lock_bh(&ar->mcastpsq_lock);
 959         }
 960         spin_unlock_bh(&ar->mcastpsq_lock);
 961
 962         clear_bit(DTIM_EXPIRED, &vif->flags);
 963
 964         /* clear the LSB of the BitMapCtl field of the TIM IE */
 965         ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, MCAST_AID, 0);
 966 }
 967
 968 void ath6kl_disconnect_event(struct ath6kl_vif *vif, u8 reason, u8 *bssid,
 969                              u8 assoc_resp_len, u8 *assoc_info,
 970                              u16 prot_reason_status)
 971 {
 972         struct ath6kl *ar = vif->ar;
 973
 974         if (vif->nw_type == AP_NETWORK) {
 975                 /* disconnect due to other STA vif switching channels */
 976                 if (reason == BSS_DISCONNECTED &&
 977                     prot_reason_status == WMI_AP_REASON_STA_ROAM) {
 978                         ar->want_ch_switch |= 1 << vif->fw_vif_idx;
 979                         /* bail back to this channel if STA vif fails connect */
 980                         ar->last_ch = le16_to_cpu(vif->profile.ch);
 981                 }
 982
 983                 if (prot_reason_status == WMI_AP_REASON_MAX_STA) {
 984                         /* send max client reached notification to user space */
 985                         cfg80211_conn_failed(vif->ndev, bssid,
 986                                              NL80211_CONN_FAIL_MAX_CLIENTS,
 987                                              GFP_KERNEL);
 988                 }
 989
 990                 if (prot_reason_status == WMI_AP_REASON_ACL) {
 991                         /* send blocked client notification to user space */
 992                         cfg80211_conn_failed(vif->ndev, bssid,
 993                                              NL80211_CONN_FAIL_BLOCKED_CLIENT,
 994                                              GFP_KERNEL);
 995                 }
 996
 997                 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
 998                         return;
 999
1000                 /* if no more associated STAs, empty the mcast PS q */
1001                 if (ar->sta_list_index == 0) {
1002                         spin_lock_bh(&ar->mcastpsq_lock);
1003                         skb_queue_purge(&ar->mcastpsq);
1004                         spin_unlock_bh(&ar->mcastpsq_lock);
1005
1006                         /* clear the LSB of the TIM IE's BitMapCtl field */
1007                         if (test_bit(WMI_READY, &ar->flag))
1008                                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1009                                                        MCAST_AID, 0);
1010                 }
1011
1012                 if (!is_broadcast_ether_addr(bssid)) {
1013                         /* send event to application */
1014                         cfg80211_del_sta(vif->ndev, bssid, GFP_KERNEL);
1015                 }
1016
1017                 if (memcmp(vif->ndev->dev_addr, bssid, ETH_ALEN) == 0) {
1018                         memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
1019                         clear_bit(CONNECTED, &vif->flags);
1020                 }
1021                 return;
1022         }
1023
1024         ath6kl_cfg80211_disconnect_event(vif, reason, bssid,
1025                                          assoc_resp_len, assoc_info,
1026                                          prot_reason_status);
1027
1028         aggr_reset_state(vif->aggr_cntxt->aggr_conn);
1029
1030         del_timer(&vif->disconnect_timer);
1031
1032         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "disconnect reason is %d\n", reason);
1033
1034         /*
1035          * If the event is due to disconnect cmd from the host, only they
1036          * the target would stop trying to connect. Under any other
1037          * condition, target would keep trying to connect.
1038          */
1039         if (reason == DISCONNECT_CMD) {
1040                 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1041                         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
1042                                                  NONE_BSS_FILTER, 0);
1043         } else {
1044                 set_bit(CONNECT_PEND, &vif->flags);
1045                 if (((reason == ASSOC_FAILED) &&
1046                      (prot_reason_status == 0x11)) ||
1047                     ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) &&
1048                      (vif->reconnect_flag == 1))) {
1049                         set_bit(CONNECTED, &vif->flags);
1050                         return;
1051                 }
1052         }
1053
1054         /* restart disconnected concurrent vifs waiting for new channel */
1055         ath6kl_check_ch_switch(ar, ar->last_ch);
1056
1057         /* update connect & link status atomically */
1058         spin_lock_bh(&vif->if_lock);
1059         clear_bit(CONNECTED, &vif->flags);
1060         netif_carrier_off(vif->ndev);
1061         spin_unlock_bh(&vif->if_lock);
1062
1063         if ((reason != CSERV_DISCONNECT) || (vif->reconnect_flag != 1))
1064                 vif->reconnect_flag = 0;
1065
1066         if (reason != CSERV_DISCONNECT)
1067                 ar->user_key_ctrl = 0;
1068
1069         netif_stop_queue(vif->ndev);
1070         memset(vif->bssid, 0, sizeof(vif->bssid));
1071         vif->bss_ch = 0;
1072
1073         ath6kl_tx_data_cleanup(ar);
1074 }
1075
1076 struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar)
1077 {
1078         struct ath6kl_vif *vif;
1079
1080         spin_lock_bh(&ar->list_lock);
1081         if (list_empty(&ar->vif_list)) {
1082                 spin_unlock_bh(&ar->list_lock);
1083                 return NULL;
1084         }
1085
1086         vif = list_first_entry(&ar->vif_list, struct ath6kl_vif, list);
1087
1088         spin_unlock_bh(&ar->list_lock);
1089
1090         return vif;
1091 }
1092
1093 static int ath6kl_open(struct net_device *dev)
1094 {
1095         struct ath6kl_vif *vif = netdev_priv(dev);
1096
1097         set_bit(WLAN_ENABLED, &vif->flags);
1098
1099         if (test_bit(CONNECTED, &vif->flags)) {
1100                 netif_carrier_on(dev);
1101                 netif_wake_queue(dev);
1102         } else {
1103                 netif_carrier_off(dev);
1104         }
1105
1106         return 0;
1107 }
1108
1109 static int ath6kl_close(struct net_device *dev)
1110 {
1111         struct ath6kl_vif *vif = netdev_priv(dev);
1112
1113         netif_stop_queue(dev);
1114
1115         ath6kl_cfg80211_stop(vif);
1116
1117         clear_bit(WLAN_ENABLED, &vif->flags);
1118
1119         return 0;
1120 }
1121
1122 static int ath6kl_set_features(struct net_device *dev,
1123                                netdev_features_t features)
1124 {
1125         struct ath6kl_vif *vif = netdev_priv(dev);
1126         struct ath6kl *ar = vif->ar;
1127         int err = 0;
1128
1129         if ((features & NETIF_F_RXCSUM) &&
1130             (ar->rx_meta_ver != WMI_META_VERSION_2)) {
1131                 ar->rx_meta_ver = WMI_META_VERSION_2;
1132                 err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1133                                                          vif->fw_vif_idx,
1134                                                          ar->rx_meta_ver, 0, 0);
1135                 if (err) {
1136                         dev->features = features & ~NETIF_F_RXCSUM;
1137                         return err;
1138                 }
1139         } else if (!(features & NETIF_F_RXCSUM) &&
1140                    (ar->rx_meta_ver == WMI_META_VERSION_2)) {
1141                 ar->rx_meta_ver = 0;
1142                 err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1143                                                          vif->fw_vif_idx,
1144                                                          ar->rx_meta_ver, 0, 0);
1145                 if (err) {
1146                         dev->features = features | NETIF_F_RXCSUM;
1147                         return err;
1148                 }
1149         }
1150
1151         return err;
1152 }
1153
1154 static void ath6kl_set_multicast_list(struct net_device *ndev)
1155 {
1156         struct ath6kl_vif *vif = netdev_priv(ndev);
1157         bool mc_all_on = false;
1158         int mc_count = netdev_mc_count(ndev);
1159         struct netdev_hw_addr *ha;
1160         bool found;
1161         struct ath6kl_mc_filter *mc_filter, *tmp;
1162         struct list_head mc_filter_new;
1163         int ret;
1164
1165         if (!test_bit(WMI_READY, &vif->ar->flag) ||
1166             !test_bit(WLAN_ENABLED, &vif->flags))
1167                 return;
1168
1169         /* Enable multicast-all filter. */
1170         mc_all_on = !!(ndev->flags & IFF_PROMISC) ||
1171                     !!(ndev->flags & IFF_ALLMULTI) ||
1172                     !!(mc_count > ATH6K_MAX_MC_FILTERS_PER_LIST);
1173
1174         if (mc_all_on)
1175                 set_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1176         else
1177                 clear_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1178
1179         if (test_bit(ATH6KL_FW_CAPABILITY_WOW_MULTICAST_FILTER,
1180                      vif->ar->fw_capabilities)) {
1181                 mc_all_on = mc_all_on || (vif->ar->state == ATH6KL_STATE_ON);
1182         }
1183
1184         if (!(ndev->flags & IFF_MULTICAST)) {
1185                 mc_all_on = false;
1186                 set_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1187         } else {
1188                 clear_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1189         }
1190
1191         /* Enable/disable "multicast-all" filter*/
1192         ath6kl_dbg(ATH6KL_DBG_TRC, "%s multicast-all filter\n",
1193                    mc_all_on ? "enabling" : "disabling");
1194
1195         ret = ath6kl_wmi_mcast_filter_cmd(vif->ar->wmi, vif->fw_vif_idx,
1196                                                   mc_all_on);
1197         if (ret) {
1198                 ath6kl_warn("Failed to %s multicast-all receive\n",
1199                             mc_all_on ? "enable" : "disable");
1200                 return;
1201         }
1202
1203         if (test_bit(NETDEV_MCAST_ALL_ON, &vif->flags))
1204                 return;
1205
1206         /* Keep the driver and firmware mcast list in sync. */
1207         list_for_each_entry_safe(mc_filter, tmp, &vif->mc_filter, list) {
1208                 found = false;
1209                 netdev_for_each_mc_addr(ha, ndev) {
1210                         if (memcmp(ha->addr, mc_filter->hw_addr,
1211                                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1212                                 found = true;
1213                                 break;
1214                         }
1215                 }
1216
1217                 if (!found) {
1218                         /*
1219                          * Delete the filter which was previously set
1220                          * but not in the new request.
1221                          */
1222                         ath6kl_dbg(ATH6KL_DBG_TRC,
1223                                    "Removing %pM from multicast filter\n",
1224                                    mc_filter->hw_addr);
1225                         ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1226                                         vif->fw_vif_idx, mc_filter->hw_addr,
1227                                         false);
1228                         if (ret) {
1229                                 ath6kl_warn("Failed to remove multicast filter:%pM\n",
1230                                             mc_filter->hw_addr);
1231                                 return;
1232                         }
1233
1234                         list_del(&mc_filter->list);
1235                         kfree(mc_filter);
1236                 }
1237         }
1238
1239         INIT_LIST_HEAD(&mc_filter_new);
1240
1241         netdev_for_each_mc_addr(ha, ndev) {
1242                 found = false;
1243                 list_for_each_entry(mc_filter, &vif->mc_filter, list) {
1244                         if (memcmp(ha->addr, mc_filter->hw_addr,
1245                                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1246                                 found = true;
1247                                 break;
1248                         }
1249                 }
1250
1251                 if (!found) {
1252                         mc_filter = kzalloc(sizeof(struct ath6kl_mc_filter),
1253                                             GFP_ATOMIC);
1254                         if (!mc_filter) {
1255                                 WARN_ON(1);
1256                                 goto out;
1257                         }
1258
1259                         memcpy(mc_filter->hw_addr, ha->addr,
1260                                ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE);
1261                         /* Set the multicast filter */
1262                         ath6kl_dbg(ATH6KL_DBG_TRC,
1263                                    "Adding %pM to multicast filter list\n",
1264                                    mc_filter->hw_addr);
1265                         ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1266                                         vif->fw_vif_idx, mc_filter->hw_addr,
1267                                         true);
1268                         if (ret) {
1269                                 ath6kl_warn("Failed to add multicast filter :%pM\n",
1270                                             mc_filter->hw_addr);
1271                                 kfree(mc_filter);
1272                                 goto out;
1273                         }
1274
1275                         list_add_tail(&mc_filter->list, &mc_filter_new);
1276                 }
1277         }
1278
1279 out:
1280         list_splice_tail(&mc_filter_new, &vif->mc_filter);
1281 }
1282
1283 static const struct net_device_ops ath6kl_netdev_ops = {
1284         .ndo_open               = ath6kl_open,
1285         .ndo_stop               = ath6kl_close,
1286         .ndo_start_xmit         = ath6kl_data_tx,
1287         .ndo_set_features       = ath6kl_set_features,
1288         .ndo_set_rx_mode        = ath6kl_set_multicast_list,
1289 };
1290
1291 void init_netdev(struct net_device *dev)
1292 {
1293         struct ath6kl *ar = ath6kl_priv(dev);
1294
1295         dev->netdev_ops = &ath6kl_netdev_ops;
1296         dev->needs_free_netdev = true;
1297         dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1298
1299         dev->needed_headroom = ETH_HLEN;
1300         dev->needed_headroom += roundup(sizeof(struct ath6kl_llc_snap_hdr) +
1301                                         sizeof(struct wmi_data_hdr) +
1302                                         HTC_HDR_LENGTH +
1303                                         WMI_MAX_TX_META_SZ +
1304                                         ATH6KL_HTC_ALIGN_BYTES, 4);
1305
1306         if (!test_bit(ATH6KL_FW_CAPABILITY_NO_IP_CHECKSUM,
1307                       ar->fw_capabilities))
1308                 dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1309
1310         return;
1311 }