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         case WPA_PSK_AUTH:
 393         case WPA2_PSK_AUTH:
 394         case (WPA_PSK_AUTH | WPA2_PSK_AUTH):
 395                 if (!ik->valid)
 396                         break;
 397
 398                 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
 399                            "Delayed addkey for the initial group key for AP mode\n");
 400                 memset(key_rsc, 0, sizeof(key_rsc));
 401                 res = ath6kl_wmi_addkey_cmd(
 402                         ar->wmi, vif->fw_vif_idx, ik->key_index, ik->key_type,
 403                         GROUP_USAGE, ik->key_len, key_rsc, ATH6KL_KEY_SEQ_LEN,
 404                         ik->key,
 405                         KEY_OP_INIT_VAL, NULL, SYNC_BOTH_WMIFLAG);
 406                 if (res) {
 407                         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
 408                                    "Delayed addkey failed: %d\n", res);
 409                 }
 410                 break;
 411         }
 412
 413         if (ar->last_ch != channel)
 414                 /* we actually don't know the phymode, default to HT20 */
 415                 ath6kl_cfg80211_ch_switch_notify(vif, channel, WMI_11G_HT20);
 416
 417         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, NONE_BSS_FILTER, 0);
 418         set_bit(CONNECTED, &vif->flags);
 419         netif_carrier_on(vif->ndev);
 420 }
 421
 422 void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr,
 423                                 u8 keymgmt, u8 ucipher, u8 auth,
 424                                 u8 assoc_req_len, u8 *assoc_info, u8 apsd_info)
 425 {
 426         u8 *ies = NULL, *wpa_ie = NULL, *pos;
 427         size_t ies_len = 0;
 428         struct station_info *sinfo;
 429
 430         ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid);
 431
 432         if (aid < 1 || aid > AP_MAX_NUM_STA)
 433                 return;
 434
 435         if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
 436                 struct ieee80211_mgmt *mgmt =
 437                         (struct ieee80211_mgmt *) assoc_info;
 438                 if (ieee80211_is_assoc_req(mgmt->frame_control) &&
 439                     assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
 440                     sizeof(mgmt->u.assoc_req)) {
 441                         ies = mgmt->u.assoc_req.variable;
 442                         ies_len = assoc_info + assoc_req_len - ies;
 443                 } else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
 444                            assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
 445                            + sizeof(mgmt->u.reassoc_req)) {
 446                         ies = mgmt->u.reassoc_req.variable;
 447                         ies_len = assoc_info + assoc_req_len - ies;
 448                 }
 449         }
 450
 451         pos = ies;
 452         while (pos && pos + 1 < ies + ies_len) {
 453                 if (pos + 2 + pos[1] > ies + ies_len)
 454                         break;
 455                 if (pos[0] == WLAN_EID_RSN)
 456                         wpa_ie = pos; /* RSN IE */
 457                 else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
 458                          pos[1] >= 4 &&
 459                          pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
 460                         if (pos[5] == 0x01)
 461                                 wpa_ie = pos; /* WPA IE */
 462                         else if (pos[5] == 0x04) {
 463                                 wpa_ie = pos; /* WPS IE */
 464                                 break; /* overrides WPA/RSN IE */
 465                         }
 466                 } else if (pos[0] == 0x44 && wpa_ie == NULL) {
 467                         /*
 468                          * Note: WAPI Parameter Set IE re-uses Element ID that
 469                          * was officially allocated for BSS AC Access Delay. As
 470                          * such, we need to be a bit more careful on when
 471                          * parsing the frame. However, BSS AC Access Delay
 472                          * element is not supposed to be included in
 473                          * (Re)Association Request frames, so this should not
 474                          * cause problems.
 475                          */
 476                         wpa_ie = pos; /* WAPI IE */
 477                         break;
 478                 }
 479                 pos += 2 + pos[1];
 480         }
 481
 482         ath6kl_add_new_sta(vif, mac_addr, aid, wpa_ie,
 483                            wpa_ie ? 2 + wpa_ie[1] : 0,
 484                            keymgmt, ucipher, auth, apsd_info);
 485
 486         /* send event to application */
 487         sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
 488         if (!sinfo)
 489                 return;
 490
 491         /* TODO: sinfo.generation */
 492
 493         sinfo->assoc_req_ies = ies;
 494         sinfo->assoc_req_ies_len = ies_len;
 495
 496         cfg80211_new_sta(vif->ndev, mac_addr, sinfo, GFP_KERNEL);
 497
 498         netif_wake_queue(vif->ndev);
 499
 500         kfree(sinfo);
 501 }
 502
 503 void disconnect_timer_handler(struct timer_list *t)
 504 {
 505         struct ath6kl_vif *vif = from_timer(vif, t, disconnect_timer);
 506
 507         ath6kl_init_profile_info(vif);
 508         ath6kl_disconnect(vif);
 509 }
 510
 511 void ath6kl_disconnect(struct ath6kl_vif *vif)
 512 {
 513         if (test_bit(CONNECTED, &vif->flags) ||
 514             test_bit(CONNECT_PEND, &vif->flags)) {
 515                 ath6kl_wmi_disconnect_cmd(vif->ar->wmi, vif->fw_vif_idx);
 516                 /*
 517                  * Disconnect command is issued, clear the connect pending
 518                  * flag. The connected flag will be cleared in
 519                  * disconnect event notification.
 520                  */
 521                 clear_bit(CONNECT_PEND, &vif->flags);
 522         }
 523 }
 524
 525 /* WMI Event handlers */
 526
 527 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver,
 528                         enum wmi_phy_cap cap)
 529 {
 530         struct ath6kl *ar = devt;
 531
 532         memcpy(ar->mac_addr, datap, ETH_ALEN);
 533
 534         ath6kl_dbg(ATH6KL_DBG_BOOT,
 535                    "ready event mac addr %pM sw_ver 0x%x abi_ver 0x%x cap 0x%x\n",
 536                    ar->mac_addr, sw_ver, abi_ver, cap);
 537
 538         ar->version.wlan_ver = sw_ver;
 539         ar->version.abi_ver = abi_ver;
 540         ar->hw.cap = cap;
 541
 542         if (strlen(ar->wiphy->fw_version) == 0) {
 543                 snprintf(ar->wiphy->fw_version,
 544                          sizeof(ar->wiphy->fw_version),
 545                          "%u.%u.%u.%u",
 546                          (ar->version.wlan_ver & 0xf0000000) >> 28,
 547                          (ar->version.wlan_ver & 0x0f000000) >> 24,
 548                          (ar->version.wlan_ver & 0x00ff0000) >> 16,
 549                          (ar->version.wlan_ver & 0x0000ffff));
 550         }
 551
 552         /* indicate to the waiting thread that the ready event was received */
 553         set_bit(WMI_READY, &ar->flag);
 554         wake_up(&ar->event_wq);
 555 }
 556
 557 void ath6kl_scan_complete_evt(struct ath6kl_vif *vif, int status)
 558 {
 559         struct ath6kl *ar = vif->ar;
 560         bool aborted = false;
 561
 562         if (status != WMI_SCAN_STATUS_SUCCESS)
 563                 aborted = true;
 564
 565         ath6kl_cfg80211_scan_complete_event(vif, aborted);
 566
 567         if (!ar->usr_bss_filter) {
 568                 clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
 569                 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
 570                                          NONE_BSS_FILTER, 0);
 571         }
 572
 573         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "scan complete: %d\n", status);
 574 }
 575
 576 static int ath6kl_commit_ch_switch(struct ath6kl_vif *vif, u16 channel)
 577 {
 578         struct ath6kl *ar = vif->ar;
 579
 580         vif->profile.ch = cpu_to_le16(channel);
 581
 582         switch (vif->nw_type) {
 583         case AP_NETWORK:
 584                 /*
 585                  * reconfigure any saved RSN IE capabilites in the beacon /
 586                  * probe response to stay in sync with the supplicant.
 587                  */
 588                 if (vif->rsn_capab &&
 589                     test_bit(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
 590                              ar->fw_capabilities))
 591                         ath6kl_wmi_set_ie_cmd(ar->wmi, vif->fw_vif_idx,
 592                                               WLAN_EID_RSN, WMI_RSN_IE_CAPB,
 593                                               (const u8 *) &vif->rsn_capab,
 594                                               sizeof(vif->rsn_capab));
 595
 596                 return ath6kl_wmi_ap_profile_commit(ar->wmi, vif->fw_vif_idx,
 597                                                     &vif->profile);
 598         default:
 599                 ath6kl_err("won't switch channels nw_type=%d\n", vif->nw_type);
 600                 return -ENOTSUPP;
 601         }
 602 }
 603
 604 static void ath6kl_check_ch_switch(struct ath6kl *ar, u16 channel)
 605 {
 606         struct ath6kl_vif *vif;
 607         int res = 0;
 608
 609         if (!ar->want_ch_switch)
 610                 return;
 611
 612         spin_lock_bh(&ar->list_lock);
 613         list_for_each_entry(vif, &ar->vif_list, list) {
 614                 if (ar->want_ch_switch & (1 << vif->fw_vif_idx))
 615                         res = ath6kl_commit_ch_switch(vif, channel);
 616
 617                 /* if channel switch failed, oh well we tried */
 618                 ar->want_ch_switch &= ~(1 << vif->fw_vif_idx);
 619
 620                 if (res)
 621                         ath6kl_err("channel switch failed nw_type %d res %d\n",
 622                                    vif->nw_type, res);
 623         }
 624         spin_unlock_bh(&ar->list_lock);
 625 }
 626
 627 void ath6kl_connect_event(struct ath6kl_vif *vif, u16 channel, u8 *bssid,
 628                           u16 listen_int, u16 beacon_int,
 629                           enum network_type net_type, u8 beacon_ie_len,
 630                           u8 assoc_req_len, u8 assoc_resp_len,
 631                           u8 *assoc_info)
 632 {
 633         struct ath6kl *ar = vif->ar;
 634
 635         ath6kl_cfg80211_connect_event(vif, channel, bssid,
 636                                       listen_int, beacon_int,
 637                                       net_type, beacon_ie_len,
 638                                       assoc_req_len, assoc_resp_len,
 639                                       assoc_info);
 640
 641         memcpy(vif->bssid, bssid, sizeof(vif->bssid));
 642         vif->bss_ch = channel;
 643
 644         if ((vif->nw_type == INFRA_NETWORK)) {
 645                 ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
 646                                               vif->listen_intvl_t, 0);
 647                 ath6kl_check_ch_switch(ar, channel);
 648         }
 649
 650         netif_wake_queue(vif->ndev);
 651
 652         /* Update connect & link status atomically */
 653         spin_lock_bh(&vif->if_lock);
 654         set_bit(CONNECTED, &vif->flags);
 655         clear_bit(CONNECT_PEND, &vif->flags);
 656         netif_carrier_on(vif->ndev);
 657         spin_unlock_bh(&vif->if_lock);
 658
 659         aggr_reset_state(vif->aggr_cntxt->aggr_conn);
 660         vif->reconnect_flag = 0;
 661
 662         if ((vif->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
 663                 memset(ar->node_map, 0, sizeof(ar->node_map));
 664                 ar->node_num = 0;
 665                 ar->next_ep_id = ENDPOINT_2;
 666         }
 667
 668         if (!ar->usr_bss_filter) {
 669                 set_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
 670                 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
 671                                          CURRENT_BSS_FILTER, 0);
 672         }
 673 }
 674
 675 void ath6kl_tkip_micerr_event(struct ath6kl_vif *vif, u8 keyid, bool ismcast)
 676 {
 677         struct ath6kl_sta *sta;
 678         struct ath6kl *ar = vif->ar;
 679         u8 tsc[6];
 680
 681         /*
 682          * For AP case, keyid will have aid of STA which sent pkt with
 683          * MIC error. Use this aid to get MAC & send it to hostapd.
 684          */
 685         if (vif->nw_type == AP_NETWORK) {
 686                 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
 687                 if (!sta)
 688                         return;
 689
 690                 ath6kl_dbg(ATH6KL_DBG_TRC,
 691                            "ap tkip mic error received from aid=%d\n", keyid);
 692
 693                 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
 694                 cfg80211_michael_mic_failure(vif->ndev, sta->mac,
 695                                              NL80211_KEYTYPE_PAIRWISE, keyid,
 696                                              tsc, GFP_KERNEL);
 697         } else {
 698                 ath6kl_cfg80211_tkip_micerr_event(vif, keyid, ismcast);
 699         }
 700 }
 701
 702 static void ath6kl_update_target_stats(struct ath6kl_vif *vif, u8 *ptr, u32 len)
 703 {
 704         struct wmi_target_stats *tgt_stats =
 705                 (struct wmi_target_stats *) ptr;
 706         struct ath6kl *ar = vif->ar;
 707         struct target_stats *stats = &vif->target_stats;
 708         struct tkip_ccmp_stats *ccmp_stats;
 709         s32 rate;
 710         u8 ac;
 711
 712         if (len < sizeof(*tgt_stats))
 713                 return;
 714
 715         ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
 716
 717         stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
 718         stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
 719         stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
 720         stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
 721         stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
 722         stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
 723         stats->tx_bcast_pkt  += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
 724         stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
 725         stats->tx_rts_success_cnt +=
 726                 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
 727
 728         for (ac = 0; ac < WMM_NUM_AC; ac++)
 729                 stats->tx_pkt_per_ac[ac] +=
 730                         le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
 731
 732         stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
 733         stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
 734         stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
 735         stats->tx_mult_retry_cnt +=
 736                 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
 737         stats->tx_rts_fail_cnt +=
 738                 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
 739
 740         rate = a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate);
 741         stats->tx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
 742
 743         stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
 744         stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
 745         stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
 746         stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
 747         stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
 748         stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
 749         stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
 750         stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
 751         stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
 752         stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
 753         stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
 754         stats->rx_key_cache_miss +=
 755                 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
 756         stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
 757         stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
 758
 759         rate = a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate);
 760         stats->rx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
 761
 762         ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
 763
 764         stats->tkip_local_mic_fail +=
 765                 le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
 766         stats->tkip_cnter_measures_invoked +=
 767                 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
 768         stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
 769
 770         stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
 771         stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
 772
 773         stats->pwr_save_fail_cnt +=
 774                 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
 775         stats->noise_floor_calib =
 776                 a_sle32_to_cpu(tgt_stats->noise_floor_calib);
 777
 778         stats->cs_bmiss_cnt +=
 779                 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
 780         stats->cs_low_rssi_cnt +=
 781                 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
 782         stats->cs_connect_cnt +=
 783                 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
 784         stats->cs_discon_cnt +=
 785                 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
 786
 787         stats->cs_ave_beacon_rssi =
 788                 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
 789
 790         stats->cs_last_roam_msec =
 791                 tgt_stats->cserv_stats.cs_last_roam_msec;
 792         stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
 793         stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
 794
 795         stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
 796
 797         stats->wow_pkt_dropped +=
 798                 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
 799         stats->wow_host_pkt_wakeups +=
 800                 tgt_stats->wow_stats.wow_host_pkt_wakeups;
 801         stats->wow_host_evt_wakeups +=
 802                 tgt_stats->wow_stats.wow_host_evt_wakeups;
 803         stats->wow_evt_discarded +=
 804                 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
 805
 806         stats->arp_received = le32_to_cpu(tgt_stats->arp_stats.arp_received);
 807         stats->arp_replied = le32_to_cpu(tgt_stats->arp_stats.arp_replied);
 808         stats->arp_matched = le32_to_cpu(tgt_stats->arp_stats.arp_matched);
 809
 810         if (test_bit(STATS_UPDATE_PEND, &vif->flags)) {
 811                 clear_bit(STATS_UPDATE_PEND, &vif->flags);
 812                 wake_up(&ar->event_wq);
 813         }
 814 }
 815
 816 static void ath6kl_add_le32(__le32 *var, __le32 val)
 817 {
 818         *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
 819 }
 820
 821 void ath6kl_tgt_stats_event(struct ath6kl_vif *vif, u8 *ptr, u32 len)
 822 {
 823         struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
 824         struct ath6kl *ar = vif->ar;
 825         struct wmi_ap_mode_stat *ap = &ar->ap_stats;
 826         struct wmi_per_sta_stat *st_ap, *st_p;
 827         u8 ac;
 828
 829         if (vif->nw_type == AP_NETWORK) {
 830                 if (len < sizeof(*p))
 831                         return;
 832
 833                 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
 834                         st_ap = &ap->sta[ac];
 835                         st_p = &p->sta[ac];
 836
 837                         ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
 838                         ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
 839                         ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
 840                         ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
 841                         ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
 842                         ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
 843                         ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
 844                         ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
 845                 }
 846
 847         } else {
 848                 ath6kl_update_target_stats(vif, ptr, len);
 849         }
 850 }
 851
 852 void ath6kl_wakeup_event(void *dev)
 853 {
 854         struct ath6kl *ar = (struct ath6kl *) dev;
 855
 856         wake_up(&ar->event_wq);
 857 }
 858
 859 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
 860 {
 861         struct ath6kl *ar = (struct ath6kl *) devt;
 862
 863         ar->tx_pwr = tx_pwr;
 864         wake_up(&ar->event_wq);
 865 }
 866
 867 void ath6kl_pspoll_event(struct ath6kl_vif *vif, u8 aid)
 868 {
 869         struct ath6kl_sta *conn;
 870         struct sk_buff *skb;
 871         bool psq_empty = false;
 872         struct ath6kl *ar = vif->ar;
 873         struct ath6kl_mgmt_buff *mgmt_buf;
 874
 875         conn = ath6kl_find_sta_by_aid(ar, aid);
 876
 877         if (!conn)
 878                 return;
 879         /*
 880          * Send out a packet queued on ps queue. When the ps queue
 881          * becomes empty update the PVB for this station.
 882          */
 883         spin_lock_bh(&conn->psq_lock);
 884         psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
 885         spin_unlock_bh(&conn->psq_lock);
 886
 887         if (psq_empty)
 888                 /* TODO: Send out a NULL data frame */
 889                 return;
 890
 891         spin_lock_bh(&conn->psq_lock);
 892         if (conn->mgmt_psq_len > 0) {
 893                 mgmt_buf = list_first_entry(&conn->mgmt_psq,
 894                                         struct ath6kl_mgmt_buff, list);
 895                 list_del(&mgmt_buf->list);
 896                 conn->mgmt_psq_len--;
 897                 spin_unlock_bh(&conn->psq_lock);
 898
 899                 conn->sta_flags |= STA_PS_POLLED;
 900                 ath6kl_wmi_send_mgmt_cmd(ar->wmi, vif->fw_vif_idx,
 901                                          mgmt_buf->id, mgmt_buf->freq,
 902                                          mgmt_buf->wait, mgmt_buf->buf,
 903                                          mgmt_buf->len, mgmt_buf->no_cck);
 904                 conn->sta_flags &= ~STA_PS_POLLED;
 905                 kfree(mgmt_buf);
 906         } else {
 907                 skb = skb_dequeue(&conn->psq);
 908                 spin_unlock_bh(&conn->psq_lock);
 909
 910                 conn->sta_flags |= STA_PS_POLLED;
 911                 ath6kl_data_tx(skb, vif->ndev);
 912                 conn->sta_flags &= ~STA_PS_POLLED;
 913         }
 914
 915         spin_lock_bh(&conn->psq_lock);
 916         psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
 917         spin_unlock_bh(&conn->psq_lock);
 918
 919         if (psq_empty)
 920                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, conn->aid, 0);
 921 }
 922
 923 void ath6kl_dtimexpiry_event(struct ath6kl_vif *vif)
 924 {
 925         bool mcastq_empty = false;
 926         struct sk_buff *skb;
 927         struct ath6kl *ar = vif->ar;
 928
 929         /*
 930          * If there are no associated STAs, ignore the DTIM expiry event.
 931          * There can be potential race conditions where the last associated
 932          * STA may disconnect & before the host could clear the 'Indicate
 933          * DTIM' request to the firmware, the firmware would have just
 934          * indicated a DTIM expiry event. The race is between 'clear DTIM
 935          * expiry cmd' going from the host to the firmware & the DTIM
 936          * expiry event happening from the firmware to the host.
 937          */
 938         if (!ar->sta_list_index)
 939                 return;
 940
 941         spin_lock_bh(&ar->mcastpsq_lock);
 942         mcastq_empty = skb_queue_empty(&ar->mcastpsq);
 943         spin_unlock_bh(&ar->mcastpsq_lock);
 944
 945         if (mcastq_empty)
 946                 return;
 947
 948         /* set the STA flag to dtim_expired for the frame to go out */
 949         set_bit(DTIM_EXPIRED, &vif->flags);
 950
 951         spin_lock_bh(&ar->mcastpsq_lock);
 952         while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
 953                 spin_unlock_bh(&ar->mcastpsq_lock);
 954
 955                 ath6kl_data_tx(skb, vif->ndev);
 956
 957                 spin_lock_bh(&ar->mcastpsq_lock);
 958         }
 959         spin_unlock_bh(&ar->mcastpsq_lock);
 960
 961         clear_bit(DTIM_EXPIRED, &vif->flags);
 962
 963         /* clear the LSB of the BitMapCtl field of the TIM IE */
 964         ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, MCAST_AID, 0);
 965 }
 966
 967 void ath6kl_disconnect_event(struct ath6kl_vif *vif, u8 reason, u8 *bssid,
 968                              u8 assoc_resp_len, u8 *assoc_info,
 969                              u16 prot_reason_status)
 970 {
 971         struct ath6kl *ar = vif->ar;
 972
 973         if (vif->nw_type == AP_NETWORK) {
 974                 /* disconnect due to other STA vif switching channels */
 975                 if (reason == BSS_DISCONNECTED &&
 976                     prot_reason_status == WMI_AP_REASON_STA_ROAM) {
 977                         ar->want_ch_switch |= 1 << vif->fw_vif_idx;
 978                         /* bail back to this channel if STA vif fails connect */
 979                         ar->last_ch = le16_to_cpu(vif->profile.ch);
 980                 }
 981
 982                 if (prot_reason_status == WMI_AP_REASON_MAX_STA) {
 983                         /* send max client reached notification to user space */
 984                         cfg80211_conn_failed(vif->ndev, bssid,
 985                                              NL80211_CONN_FAIL_MAX_CLIENTS,
 986                                              GFP_KERNEL);
 987                 }
 988
 989                 if (prot_reason_status == WMI_AP_REASON_ACL) {
 990                         /* send blocked client notification to user space */
 991                         cfg80211_conn_failed(vif->ndev, bssid,
 992                                              NL80211_CONN_FAIL_BLOCKED_CLIENT,
 993                                              GFP_KERNEL);
 994                 }
 995
 996                 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
 997                         return;
 998
 999                 /* if no more associated STAs, empty the mcast PS q */
1000                 if (ar->sta_list_index == 0) {
1001                         spin_lock_bh(&ar->mcastpsq_lock);
1002                         skb_queue_purge(&ar->mcastpsq);
1003                         spin_unlock_bh(&ar->mcastpsq_lock);
1004
1005                         /* clear the LSB of the TIM IE's BitMapCtl field */
1006                         if (test_bit(WMI_READY, &ar->flag))
1007                                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1008                                                        MCAST_AID, 0);
1009                 }
1010
1011                 if (!is_broadcast_ether_addr(bssid)) {
1012                         /* send event to application */
1013                         cfg80211_del_sta(vif->ndev, bssid, GFP_KERNEL);
1014                 }
1015
1016                 if (memcmp(vif->ndev->dev_addr, bssid, ETH_ALEN) == 0) {
1017                         memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
1018                         clear_bit(CONNECTED, &vif->flags);
1019                 }
1020                 return;
1021         }
1022
1023         ath6kl_cfg80211_disconnect_event(vif, reason, bssid,
1024                                          assoc_resp_len, assoc_info,
1025                                          prot_reason_status);
1026
1027         aggr_reset_state(vif->aggr_cntxt->aggr_conn);
1028
1029         del_timer(&vif->disconnect_timer);
1030
1031         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "disconnect reason is %d\n", reason);
1032
1033         /*
1034          * If the event is due to disconnect cmd from the host, only they
1035          * the target would stop trying to connect. Under any other
1036          * condition, target would keep trying to connect.
1037          */
1038         if (reason == DISCONNECT_CMD) {
1039                 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1040                         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
1041                                                  NONE_BSS_FILTER, 0);
1042         } else {
1043                 set_bit(CONNECT_PEND, &vif->flags);
1044                 if (((reason == ASSOC_FAILED) &&
1045                      (prot_reason_status == 0x11)) ||
1046                     ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) &&
1047                      (vif->reconnect_flag == 1))) {
1048                         set_bit(CONNECTED, &vif->flags);
1049                         return;
1050                 }
1051         }
1052
1053         /* restart disconnected concurrent vifs waiting for new channel */
1054         ath6kl_check_ch_switch(ar, ar->last_ch);
1055
1056         /* update connect & link status atomically */
1057         spin_lock_bh(&vif->if_lock);
1058         clear_bit(CONNECTED, &vif->flags);
1059         netif_carrier_off(vif->ndev);
1060         spin_unlock_bh(&vif->if_lock);
1061
1062         if ((reason != CSERV_DISCONNECT) || (vif->reconnect_flag != 1))
1063                 vif->reconnect_flag = 0;
1064
1065         if (reason != CSERV_DISCONNECT)
1066                 ar->user_key_ctrl = 0;
1067
1068         netif_stop_queue(vif->ndev);
1069         memset(vif->bssid, 0, sizeof(vif->bssid));
1070         vif->bss_ch = 0;
1071
1072         ath6kl_tx_data_cleanup(ar);
1073 }
1074
1075 struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar)
1076 {
1077         struct ath6kl_vif *vif;
1078
1079         spin_lock_bh(&ar->list_lock);
1080         if (list_empty(&ar->vif_list)) {
1081                 spin_unlock_bh(&ar->list_lock);
1082                 return NULL;
1083         }
1084
1085         vif = list_first_entry(&ar->vif_list, struct ath6kl_vif, list);
1086
1087         spin_unlock_bh(&ar->list_lock);
1088
1089         return vif;
1090 }
1091
1092 static int ath6kl_open(struct net_device *dev)
1093 {
1094         struct ath6kl_vif *vif = netdev_priv(dev);
1095
1096         set_bit(WLAN_ENABLED, &vif->flags);
1097
1098         if (test_bit(CONNECTED, &vif->flags)) {
1099                 netif_carrier_on(dev);
1100                 netif_wake_queue(dev);
1101         } else {
1102                 netif_carrier_off(dev);
1103         }
1104
1105         return 0;
1106 }
1107
1108 static int ath6kl_close(struct net_device *dev)
1109 {
1110         struct ath6kl_vif *vif = netdev_priv(dev);
1111
1112         netif_stop_queue(dev);
1113
1114         ath6kl_cfg80211_stop(vif);
1115
1116         clear_bit(WLAN_ENABLED, &vif->flags);
1117
1118         return 0;
1119 }
1120
1121 static int ath6kl_set_features(struct net_device *dev,
1122                                netdev_features_t features)
1123 {
1124         struct ath6kl_vif *vif = netdev_priv(dev);
1125         struct ath6kl *ar = vif->ar;
1126         int err = 0;
1127
1128         if ((features & NETIF_F_RXCSUM) &&
1129             (ar->rx_meta_ver != WMI_META_VERSION_2)) {
1130                 ar->rx_meta_ver = WMI_META_VERSION_2;
1131                 err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1132                                                          vif->fw_vif_idx,
1133                                                          ar->rx_meta_ver, 0, 0);
1134                 if (err) {
1135                         dev->features = features & ~NETIF_F_RXCSUM;
1136                         return err;
1137                 }
1138         } else if (!(features & NETIF_F_RXCSUM) &&
1139                    (ar->rx_meta_ver == WMI_META_VERSION_2)) {
1140                 ar->rx_meta_ver = 0;
1141                 err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1142                                                          vif->fw_vif_idx,
1143                                                          ar->rx_meta_ver, 0, 0);
1144                 if (err) {
1145                         dev->features = features | NETIF_F_RXCSUM;
1146                         return err;
1147                 }
1148         }
1149
1150         return err;
1151 }
1152
1153 static void ath6kl_set_multicast_list(struct net_device *ndev)
1154 {
1155         struct ath6kl_vif *vif = netdev_priv(ndev);
1156         bool mc_all_on = false;
1157         int mc_count = netdev_mc_count(ndev);
1158         struct netdev_hw_addr *ha;
1159         bool found;
1160         struct ath6kl_mc_filter *mc_filter, *tmp;
1161         struct list_head mc_filter_new;
1162         int ret;
1163
1164         if (!test_bit(WMI_READY, &vif->ar->flag) ||
1165             !test_bit(WLAN_ENABLED, &vif->flags))
1166                 return;
1167
1168         /* Enable multicast-all filter. */
1169         mc_all_on = !!(ndev->flags & IFF_PROMISC) ||
1170                     !!(ndev->flags & IFF_ALLMULTI) ||
1171                     !!(mc_count > ATH6K_MAX_MC_FILTERS_PER_LIST);
1172
1173         if (mc_all_on)
1174                 set_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1175         else
1176                 clear_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1177
1178         if (test_bit(ATH6KL_FW_CAPABILITY_WOW_MULTICAST_FILTER,
1179                      vif->ar->fw_capabilities)) {
1180                 mc_all_on = mc_all_on || (vif->ar->state == ATH6KL_STATE_ON);
1181         }
1182
1183         if (!(ndev->flags & IFF_MULTICAST)) {
1184                 mc_all_on = false;
1185                 set_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1186         } else {
1187                 clear_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1188         }
1189
1190         /* Enable/disable "multicast-all" filter*/
1191         ath6kl_dbg(ATH6KL_DBG_TRC, "%s multicast-all filter\n",
1192                    mc_all_on ? "enabling" : "disabling");
1193
1194         ret = ath6kl_wmi_mcast_filter_cmd(vif->ar->wmi, vif->fw_vif_idx,
1195                                                   mc_all_on);
1196         if (ret) {
1197                 ath6kl_warn("Failed to %s multicast-all receive\n",
1198                             mc_all_on ? "enable" : "disable");
1199                 return;
1200         }
1201
1202         if (test_bit(NETDEV_MCAST_ALL_ON, &vif->flags))
1203                 return;
1204
1205         /* Keep the driver and firmware mcast list in sync. */
1206         list_for_each_entry_safe(mc_filter, tmp, &vif->mc_filter, list) {
1207                 found = false;
1208                 netdev_for_each_mc_addr(ha, ndev) {
1209                         if (memcmp(ha->addr, mc_filter->hw_addr,
1210                                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1211                                 found = true;
1212                                 break;
1213                         }
1214                 }
1215
1216                 if (!found) {
1217                         /*
1218                          * Delete the filter which was previously set
1219                          * but not in the new request.
1220                          */
1221                         ath6kl_dbg(ATH6KL_DBG_TRC,
1222                                    "Removing %pM from multicast filter\n",
1223                                    mc_filter->hw_addr);
1224                         ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1225                                         vif->fw_vif_idx, mc_filter->hw_addr,
1226                                         false);
1227                         if (ret) {
1228                                 ath6kl_warn("Failed to remove multicast filter:%pM\n",
1229                                             mc_filter->hw_addr);
1230                                 return;
1231                         }
1232
1233                         list_del(&mc_filter->list);
1234                         kfree(mc_filter);
1235                 }
1236         }
1237
1238         INIT_LIST_HEAD(&mc_filter_new);
1239
1240         netdev_for_each_mc_addr(ha, ndev) {
1241                 found = false;
1242                 list_for_each_entry(mc_filter, &vif->mc_filter, list) {
1243                         if (memcmp(ha->addr, mc_filter->hw_addr,
1244                                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1245                                 found = true;
1246                                 break;
1247                         }
1248                 }
1249
1250                 if (!found) {
1251                         mc_filter = kzalloc(sizeof(struct ath6kl_mc_filter),
1252                                             GFP_ATOMIC);
1253                         if (!mc_filter) {
1254                                 WARN_ON(1);
1255                                 goto out;
1256                         }
1257
1258                         memcpy(mc_filter->hw_addr, ha->addr,
1259                                ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE);
1260                         /* Set the multicast filter */
1261                         ath6kl_dbg(ATH6KL_DBG_TRC,
1262                                    "Adding %pM to multicast filter list\n",
1263                                    mc_filter->hw_addr);
1264                         ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1265                                         vif->fw_vif_idx, mc_filter->hw_addr,
1266                                         true);
1267                         if (ret) {
1268                                 ath6kl_warn("Failed to add multicast filter :%pM\n",
1269                                             mc_filter->hw_addr);
1270                                 kfree(mc_filter);
1271                                 goto out;
1272                         }
1273
1274                         list_add_tail(&mc_filter->list, &mc_filter_new);
1275                 }
1276         }
1277
1278 out:
1279         list_splice_tail(&mc_filter_new, &vif->mc_filter);
1280 }
1281
1282 static const struct net_device_ops ath6kl_netdev_ops = {
1283         .ndo_open               = ath6kl_open,
1284         .ndo_stop               = ath6kl_close,
1285         .ndo_start_xmit         = ath6kl_data_tx,
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         struct ath6kl *ar = ath6kl_priv(dev);
1293
1294         dev->netdev_ops = &ath6kl_netdev_ops;
1295         dev->needs_free_netdev = true;
1296         dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1297
1298         dev->needed_headroom = ETH_HLEN;
1299         dev->needed_headroom += roundup(sizeof(struct ath6kl_llc_snap_hdr) +
1300                                         sizeof(struct wmi_data_hdr) +
1301                                         HTC_HDR_LENGTH +
1302                                         WMI_MAX_TX_META_SZ +
1303                                         ATH6KL_HTC_ALIGN_BYTES, 4);
1304
1305         if (!test_bit(ATH6KL_FW_CAPABILITY_NO_IP_CHECKSUM,
1306                       ar->fw_capabilities))
1307                 dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1308
1309         return;
1310 }