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                 /* fall through */
 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 (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
 434                 struct ieee80211_mgmt *mgmt =
 435                         (struct ieee80211_mgmt *) assoc_info;
 436                 if (ieee80211_is_assoc_req(mgmt->frame_control) &&
 437                     assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
 438                     sizeof(mgmt->u.assoc_req)) {
 439                         ies = mgmt->u.assoc_req.variable;
 440                         ies_len = assoc_info + assoc_req_len - ies;
 441                 } else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
 442                            assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
 443                            + sizeof(mgmt->u.reassoc_req)) {
 444                         ies = mgmt->u.reassoc_req.variable;
 445                         ies_len = assoc_info + assoc_req_len - ies;
 446                 }
 447         }
 448
 449         pos = ies;
 450         while (pos && pos + 1 < ies + ies_len) {
 451                 if (pos + 2 + pos[1] > ies + ies_len)
 452                         break;
 453                 if (pos[0] == WLAN_EID_RSN)
 454                         wpa_ie = pos; /* RSN IE */
 455                 else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
 456                          pos[1] >= 4 &&
 457                          pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
 458                         if (pos[5] == 0x01)
 459                                 wpa_ie = pos; /* WPA IE */
 460                         else if (pos[5] == 0x04) {
 461                                 wpa_ie = pos; /* WPS IE */
 462                                 break; /* overrides WPA/RSN IE */
 463                         }
 464                 } else if (pos[0] == 0x44 && wpa_ie == NULL) {
 465                         /*
 466                          * Note: WAPI Parameter Set IE re-uses Element ID that
 467                          * was officially allocated for BSS AC Access Delay. As
 468                          * such, we need to be a bit more careful on when
 469                          * parsing the frame. However, BSS AC Access Delay
 470                          * element is not supposed to be included in
 471                          * (Re)Association Request frames, so this should not
 472                          * cause problems.
 473                          */
 474                         wpa_ie = pos; /* WAPI IE */
 475                         break;
 476                 }
 477                 pos += 2 + pos[1];
 478         }
 479
 480         ath6kl_add_new_sta(vif, mac_addr, aid, wpa_ie,
 481                            wpa_ie ? 2 + wpa_ie[1] : 0,
 482                            keymgmt, ucipher, auth, apsd_info);
 483
 484         /* send event to application */
 485         sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
 486         if (!sinfo)
 487                 return;
 488
 489         /* TODO: sinfo.generation */
 490
 491         sinfo->assoc_req_ies = ies;
 492         sinfo->assoc_req_ies_len = ies_len;
 493
 494         cfg80211_new_sta(vif->ndev, mac_addr, sinfo, GFP_KERNEL);
 495
 496         netif_wake_queue(vif->ndev);
 497
 498         kfree(sinfo);
 499 }
 500
 501 void disconnect_timer_handler(struct timer_list *t)
 502 {
 503         struct ath6kl_vif *vif = from_timer(vif, t, disconnect_timer);
 504
 505         ath6kl_init_profile_info(vif);
 506         ath6kl_disconnect(vif);
 507 }
 508
 509 void ath6kl_disconnect(struct ath6kl_vif *vif)
 510 {
 511         if (test_bit(CONNECTED, &vif->flags) ||
 512             test_bit(CONNECT_PEND, &vif->flags)) {
 513                 ath6kl_wmi_disconnect_cmd(vif->ar->wmi, vif->fw_vif_idx);
 514                 /*
 515                  * Disconnect command is issued, clear the connect pending
 516                  * flag. The connected flag will be cleared in
 517                  * disconnect event notification.
 518                  */
 519                 clear_bit(CONNECT_PEND, &vif->flags);
 520         }
 521 }
 522
 523 /* WMI Event handlers */
 524
 525 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver,
 526                         enum wmi_phy_cap cap)
 527 {
 528         struct ath6kl *ar = devt;
 529
 530         memcpy(ar->mac_addr, datap, ETH_ALEN);
 531
 532         ath6kl_dbg(ATH6KL_DBG_BOOT,
 533                    "ready event mac addr %pM sw_ver 0x%x abi_ver 0x%x cap 0x%x\n",
 534                    ar->mac_addr, sw_ver, abi_ver, cap);
 535
 536         ar->version.wlan_ver = sw_ver;
 537         ar->version.abi_ver = abi_ver;
 538         ar->hw.cap = cap;
 539
 540         if (strlen(ar->wiphy->fw_version) == 0) {
 541                 snprintf(ar->wiphy->fw_version,
 542                          sizeof(ar->wiphy->fw_version),
 543                          "%u.%u.%u.%u",
 544                          (ar->version.wlan_ver & 0xf0000000) >> 28,
 545                          (ar->version.wlan_ver & 0x0f000000) >> 24,
 546                          (ar->version.wlan_ver & 0x00ff0000) >> 16,
 547                          (ar->version.wlan_ver & 0x0000ffff));
 548         }
 549
 550         /* indicate to the waiting thread that the ready event was received */
 551         set_bit(WMI_READY, &ar->flag);
 552         wake_up(&ar->event_wq);
 553 }
 554
 555 void ath6kl_scan_complete_evt(struct ath6kl_vif *vif, int status)
 556 {
 557         struct ath6kl *ar = vif->ar;
 558         bool aborted = false;
 559
 560         if (status != WMI_SCAN_STATUS_SUCCESS)
 561                 aborted = true;
 562
 563         ath6kl_cfg80211_scan_complete_event(vif, aborted);
 564
 565         if (!ar->usr_bss_filter) {
 566                 clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
 567                 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
 568                                          NONE_BSS_FILTER, 0);
 569         }
 570
 571         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "scan complete: %d\n", status);
 572 }
 573
 574 static int ath6kl_commit_ch_switch(struct ath6kl_vif *vif, u16 channel)
 575 {
 576         struct ath6kl *ar = vif->ar;
 577
 578         vif->profile.ch = cpu_to_le16(channel);
 579
 580         switch (vif->nw_type) {
 581         case AP_NETWORK:
 582                 /*
 583                  * reconfigure any saved RSN IE capabilites in the beacon /
 584                  * probe response to stay in sync with the supplicant.
 585                  */
 586                 if (vif->rsn_capab &&
 587                     test_bit(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
 588                              ar->fw_capabilities))
 589                         ath6kl_wmi_set_ie_cmd(ar->wmi, vif->fw_vif_idx,
 590                                               WLAN_EID_RSN, WMI_RSN_IE_CAPB,
 591                                               (const u8 *) &vif->rsn_capab,
 592                                               sizeof(vif->rsn_capab));
 593
 594                 return ath6kl_wmi_ap_profile_commit(ar->wmi, vif->fw_vif_idx,
 595                                                     &vif->profile);
 596         default:
 597                 ath6kl_err("won't switch channels nw_type=%d\n", vif->nw_type);
 598                 return -ENOTSUPP;
 599         }
 600 }
 601
 602 static void ath6kl_check_ch_switch(struct ath6kl *ar, u16 channel)
 603 {
 604         struct ath6kl_vif *vif;
 605         int res = 0;
 606
 607         if (!ar->want_ch_switch)
 608                 return;
 609
 610         spin_lock_bh(&ar->list_lock);
 611         list_for_each_entry(vif, &ar->vif_list, list) {
 612                 if (ar->want_ch_switch & (1 << vif->fw_vif_idx))
 613                         res = ath6kl_commit_ch_switch(vif, channel);
 614
 615                 /* if channel switch failed, oh well we tried */
 616                 ar->want_ch_switch &= ~(1 << vif->fw_vif_idx);
 617
 618                 if (res)
 619                         ath6kl_err("channel switch failed nw_type %d res %d\n",
 620                                    vif->nw_type, res);
 621         }
 622         spin_unlock_bh(&ar->list_lock);
 623 }
 624
 625 void ath6kl_connect_event(struct ath6kl_vif *vif, u16 channel, u8 *bssid,
 626                           u16 listen_int, u16 beacon_int,
 627                           enum network_type net_type, u8 beacon_ie_len,
 628                           u8 assoc_req_len, u8 assoc_resp_len,
 629                           u8 *assoc_info)
 630 {
 631         struct ath6kl *ar = vif->ar;
 632
 633         ath6kl_cfg80211_connect_event(vif, channel, bssid,
 634                                       listen_int, beacon_int,
 635                                       net_type, beacon_ie_len,
 636                                       assoc_req_len, assoc_resp_len,
 637                                       assoc_info);
 638
 639         memcpy(vif->bssid, bssid, sizeof(vif->bssid));
 640         vif->bss_ch = channel;
 641
 642         if (vif->nw_type == INFRA_NETWORK) {
 643                 ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
 644                                               vif->listen_intvl_t, 0);
 645                 ath6kl_check_ch_switch(ar, channel);
 646         }
 647
 648         netif_wake_queue(vif->ndev);
 649
 650         /* Update connect & link status atomically */
 651         spin_lock_bh(&vif->if_lock);
 652         set_bit(CONNECTED, &vif->flags);
 653         clear_bit(CONNECT_PEND, &vif->flags);
 654         netif_carrier_on(vif->ndev);
 655         spin_unlock_bh(&vif->if_lock);
 656
 657         aggr_reset_state(vif->aggr_cntxt->aggr_conn);
 658         vif->reconnect_flag = 0;
 659
 660         if ((vif->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
 661                 memset(ar->node_map, 0, sizeof(ar->node_map));
 662                 ar->node_num = 0;
 663                 ar->next_ep_id = ENDPOINT_2;
 664         }
 665
 666         if (!ar->usr_bss_filter) {
 667                 set_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
 668                 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
 669                                          CURRENT_BSS_FILTER, 0);
 670         }
 671 }
 672
 673 void ath6kl_tkip_micerr_event(struct ath6kl_vif *vif, u8 keyid, bool ismcast)
 674 {
 675         struct ath6kl_sta *sta;
 676         struct ath6kl *ar = vif->ar;
 677         u8 tsc[6];
 678
 679         /*
 680          * For AP case, keyid will have aid of STA which sent pkt with
 681          * MIC error. Use this aid to get MAC & send it to hostapd.
 682          */
 683         if (vif->nw_type == AP_NETWORK) {
 684                 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
 685                 if (!sta)
 686                         return;
 687
 688                 ath6kl_dbg(ATH6KL_DBG_TRC,
 689                            "ap tkip mic error received from aid=%d\n", keyid);
 690
 691                 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
 692                 cfg80211_michael_mic_failure(vif->ndev, sta->mac,
 693                                              NL80211_KEYTYPE_PAIRWISE, keyid,
 694                                              tsc, GFP_KERNEL);
 695         } else {
 696                 ath6kl_cfg80211_tkip_micerr_event(vif, keyid, ismcast);
 697         }
 698 }
 699
 700 static void ath6kl_update_target_stats(struct ath6kl_vif *vif, u8 *ptr, u32 len)
 701 {
 702         struct wmi_target_stats *tgt_stats =
 703                 (struct wmi_target_stats *) ptr;
 704         struct ath6kl *ar = vif->ar;
 705         struct target_stats *stats = &vif->target_stats;
 706         struct tkip_ccmp_stats *ccmp_stats;
 707         s32 rate;
 708         u8 ac;
 709
 710         if (len < sizeof(*tgt_stats))
 711                 return;
 712
 713         ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
 714
 715         stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
 716         stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
 717         stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
 718         stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
 719         stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
 720         stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
 721         stats->tx_bcast_pkt  += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
 722         stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
 723         stats->tx_rts_success_cnt +=
 724                 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
 725
 726         for (ac = 0; ac < WMM_NUM_AC; ac++)
 727                 stats->tx_pkt_per_ac[ac] +=
 728                         le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
 729
 730         stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
 731         stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
 732         stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
 733         stats->tx_mult_retry_cnt +=
 734                 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
 735         stats->tx_rts_fail_cnt +=
 736                 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
 737
 738         rate = a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate);
 739         stats->tx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
 740
 741         stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
 742         stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
 743         stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
 744         stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
 745         stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
 746         stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
 747         stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
 748         stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
 749         stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
 750         stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
 751         stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
 752         stats->rx_key_cache_miss +=
 753                 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
 754         stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
 755         stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
 756
 757         rate = a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate);
 758         stats->rx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
 759
 760         ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
 761
 762         stats->tkip_local_mic_fail +=
 763                 le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
 764         stats->tkip_cnter_measures_invoked +=
 765                 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
 766         stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
 767
 768         stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
 769         stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
 770
 771         stats->pwr_save_fail_cnt +=
 772                 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
 773         stats->noise_floor_calib =
 774                 a_sle32_to_cpu(tgt_stats->noise_floor_calib);
 775
 776         stats->cs_bmiss_cnt +=
 777                 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
 778         stats->cs_low_rssi_cnt +=
 779                 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
 780         stats->cs_connect_cnt +=
 781                 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
 782         stats->cs_discon_cnt +=
 783                 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
 784
 785         stats->cs_ave_beacon_rssi =
 786                 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
 787
 788         stats->cs_last_roam_msec =
 789                 tgt_stats->cserv_stats.cs_last_roam_msec;
 790         stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
 791         stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
 792
 793         stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
 794
 795         stats->wow_pkt_dropped +=
 796                 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
 797         stats->wow_host_pkt_wakeups +=
 798                 tgt_stats->wow_stats.wow_host_pkt_wakeups;
 799         stats->wow_host_evt_wakeups +=
 800                 tgt_stats->wow_stats.wow_host_evt_wakeups;
 801         stats->wow_evt_discarded +=
 802                 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
 803
 804         stats->arp_received = le32_to_cpu(tgt_stats->arp_stats.arp_received);
 805         stats->arp_replied = le32_to_cpu(tgt_stats->arp_stats.arp_replied);
 806         stats->arp_matched = le32_to_cpu(tgt_stats->arp_stats.arp_matched);
 807
 808         if (test_bit(STATS_UPDATE_PEND, &vif->flags)) {
 809                 clear_bit(STATS_UPDATE_PEND, &vif->flags);
 810                 wake_up(&ar->event_wq);
 811         }
 812 }
 813
 814 static void ath6kl_add_le32(__le32 *var, __le32 val)
 815 {
 816         *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
 817 }
 818
 819 void ath6kl_tgt_stats_event(struct ath6kl_vif *vif, u8 *ptr, u32 len)
 820 {
 821         struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
 822         struct ath6kl *ar = vif->ar;
 823         struct wmi_ap_mode_stat *ap = &ar->ap_stats;
 824         struct wmi_per_sta_stat *st_ap, *st_p;
 825         u8 ac;
 826
 827         if (vif->nw_type == AP_NETWORK) {
 828                 if (len < sizeof(*p))
 829                         return;
 830
 831                 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
 832                         st_ap = &ap->sta[ac];
 833                         st_p = &p->sta[ac];
 834
 835                         ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
 836                         ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
 837                         ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
 838                         ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
 839                         ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
 840                         ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
 841                         ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
 842                         ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
 843                 }
 844
 845         } else {
 846                 ath6kl_update_target_stats(vif, ptr, len);
 847         }
 848 }
 849
 850 void ath6kl_wakeup_event(void *dev)
 851 {
 852         struct ath6kl *ar = (struct ath6kl *) dev;
 853
 854         wake_up(&ar->event_wq);
 855 }
 856
 857 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
 858 {
 859         struct ath6kl *ar = (struct ath6kl *) devt;
 860
 861         ar->tx_pwr = tx_pwr;
 862         wake_up(&ar->event_wq);
 863 }
 864
 865 void ath6kl_pspoll_event(struct ath6kl_vif *vif, u8 aid)
 866 {
 867         struct ath6kl_sta *conn;
 868         struct sk_buff *skb;
 869         bool psq_empty = false;
 870         struct ath6kl *ar = vif->ar;
 871         struct ath6kl_mgmt_buff *mgmt_buf;
 872
 873         conn = ath6kl_find_sta_by_aid(ar, aid);
 874
 875         if (!conn)
 876                 return;
 877         /*
 878          * Send out a packet queued on ps queue. When the ps queue
 879          * becomes empty update the PVB for this station.
 880          */
 881         spin_lock_bh(&conn->psq_lock);
 882         psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
 883         spin_unlock_bh(&conn->psq_lock);
 884
 885         if (psq_empty)
 886                 /* TODO: Send out a NULL data frame */
 887                 return;
 888
 889         spin_lock_bh(&conn->psq_lock);
 890         if (conn->mgmt_psq_len > 0) {
 891                 mgmt_buf = list_first_entry(&conn->mgmt_psq,
 892                                         struct ath6kl_mgmt_buff, list);
 893                 list_del(&mgmt_buf->list);
 894                 conn->mgmt_psq_len--;
 895                 spin_unlock_bh(&conn->psq_lock);
 896
 897                 conn->sta_flags |= STA_PS_POLLED;
 898                 ath6kl_wmi_send_mgmt_cmd(ar->wmi, vif->fw_vif_idx,
 899                                          mgmt_buf->id, mgmt_buf->freq,
 900                                          mgmt_buf->wait, mgmt_buf->buf,
 901                                          mgmt_buf->len, mgmt_buf->no_cck);
 902                 conn->sta_flags &= ~STA_PS_POLLED;
 903                 kfree(mgmt_buf);
 904         } else {
 905                 skb = skb_dequeue(&conn->psq);
 906                 spin_unlock_bh(&conn->psq_lock);
 907
 908                 conn->sta_flags |= STA_PS_POLLED;
 909                 ath6kl_data_tx(skb, vif->ndev);
 910                 conn->sta_flags &= ~STA_PS_POLLED;
 911         }
 912
 913         spin_lock_bh(&conn->psq_lock);
 914         psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
 915         spin_unlock_bh(&conn->psq_lock);
 916
 917         if (psq_empty)
 918                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, conn->aid, 0);
 919 }
 920
 921 void ath6kl_dtimexpiry_event(struct ath6kl_vif *vif)
 922 {
 923         bool mcastq_empty = false;
 924         struct sk_buff *skb;
 925         struct ath6kl *ar = vif->ar;
 926
 927         /*
 928          * If there are no associated STAs, ignore the DTIM expiry event.
 929          * There can be potential race conditions where the last associated
 930          * STA may disconnect & before the host could clear the 'Indicate
 931          * DTIM' request to the firmware, the firmware would have just
 932          * indicated a DTIM expiry event. The race is between 'clear DTIM
 933          * expiry cmd' going from the host to the firmware & the DTIM
 934          * expiry event happening from the firmware to the host.
 935          */
 936         if (!ar->sta_list_index)
 937                 return;
 938
 939         spin_lock_bh(&ar->mcastpsq_lock);
 940         mcastq_empty = skb_queue_empty(&ar->mcastpsq);
 941         spin_unlock_bh(&ar->mcastpsq_lock);
 942
 943         if (mcastq_empty)
 944                 return;
 945
 946         /* set the STA flag to dtim_expired for the frame to go out */
 947         set_bit(DTIM_EXPIRED, &vif->flags);
 948
 949         spin_lock_bh(&ar->mcastpsq_lock);
 950         while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
 951                 spin_unlock_bh(&ar->mcastpsq_lock);
 952
 953                 ath6kl_data_tx(skb, vif->ndev);
 954
 955                 spin_lock_bh(&ar->mcastpsq_lock);
 956         }
 957         spin_unlock_bh(&ar->mcastpsq_lock);
 958
 959         clear_bit(DTIM_EXPIRED, &vif->flags);
 960
 961         /* clear the LSB of the BitMapCtl field of the TIM IE */
 962         ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, MCAST_AID, 0);
 963 }
 964
 965 void ath6kl_disconnect_event(struct ath6kl_vif *vif, u8 reason, u8 *bssid,
 966                              u8 assoc_resp_len, u8 *assoc_info,
 967                              u16 prot_reason_status)
 968 {
 969         struct ath6kl *ar = vif->ar;
 970
 971         if (vif->nw_type == AP_NETWORK) {
 972                 /* disconnect due to other STA vif switching channels */
 973                 if (reason == BSS_DISCONNECTED &&
 974                     prot_reason_status == WMI_AP_REASON_STA_ROAM) {
 975                         ar->want_ch_switch |= 1 << vif->fw_vif_idx;
 976                         /* bail back to this channel if STA vif fails connect */
 977                         ar->last_ch = le16_to_cpu(vif->profile.ch);
 978                 }
 979
 980                 if (prot_reason_status == WMI_AP_REASON_MAX_STA) {
 981                         /* send max client reached notification to user space */
 982                         cfg80211_conn_failed(vif->ndev, bssid,
 983                                              NL80211_CONN_FAIL_MAX_CLIENTS,
 984                                              GFP_KERNEL);
 985                 }
 986
 987                 if (prot_reason_status == WMI_AP_REASON_ACL) {
 988                         /* send blocked client notification to user space */
 989                         cfg80211_conn_failed(vif->ndev, bssid,
 990                                              NL80211_CONN_FAIL_BLOCKED_CLIENT,
 991                                              GFP_KERNEL);
 992                 }
 993
 994                 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
 995                         return;
 996
 997                 /* if no more associated STAs, empty the mcast PS q */
 998                 if (ar->sta_list_index == 0) {
 999                         spin_lock_bh(&ar->mcastpsq_lock);
1000                         skb_queue_purge(&ar->mcastpsq);
1001                         spin_unlock_bh(&ar->mcastpsq_lock);
1002
1003                         /* clear the LSB of the TIM IE's BitMapCtl field */
1004                         if (test_bit(WMI_READY, &ar->flag))
1005                                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1006                                                        MCAST_AID, 0);
1007                 }
1008
1009                 if (!is_broadcast_ether_addr(bssid)) {
1010                         /* send event to application */
1011                         cfg80211_del_sta(vif->ndev, bssid, GFP_KERNEL);
1012                 }
1013
1014                 if (memcmp(vif->ndev->dev_addr, bssid, ETH_ALEN) == 0) {
1015                         memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
1016                         clear_bit(CONNECTED, &vif->flags);
1017                 }
1018                 return;
1019         }
1020
1021         ath6kl_cfg80211_disconnect_event(vif, reason, bssid,
1022                                          assoc_resp_len, assoc_info,
1023                                          prot_reason_status);
1024
1025         aggr_reset_state(vif->aggr_cntxt->aggr_conn);
1026
1027         del_timer(&vif->disconnect_timer);
1028
1029         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "disconnect reason is %d\n", reason);
1030
1031         /*
1032          * If the event is due to disconnect cmd from the host, only they
1033          * the target would stop trying to connect. Under any other
1034          * condition, target would keep trying to connect.
1035          */
1036         if (reason == DISCONNECT_CMD) {
1037                 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1038                         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
1039                                                  NONE_BSS_FILTER, 0);
1040         } else {
1041                 set_bit(CONNECT_PEND, &vif->flags);
1042                 if (((reason == ASSOC_FAILED) &&
1043                      (prot_reason_status == 0x11)) ||
1044                     ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) &&
1045                      (vif->reconnect_flag == 1))) {
1046                         set_bit(CONNECTED, &vif->flags);
1047                         return;
1048                 }
1049         }
1050
1051         /* restart disconnected concurrent vifs waiting for new channel */
1052         ath6kl_check_ch_switch(ar, ar->last_ch);
1053
1054         /* update connect & link status atomically */
1055         spin_lock_bh(&vif->if_lock);
1056         clear_bit(CONNECTED, &vif->flags);
1057         netif_carrier_off(vif->ndev);
1058         spin_unlock_bh(&vif->if_lock);
1059
1060         if ((reason != CSERV_DISCONNECT) || (vif->reconnect_flag != 1))
1061                 vif->reconnect_flag = 0;
1062
1063         if (reason != CSERV_DISCONNECT)
1064                 ar->user_key_ctrl = 0;
1065
1066         netif_stop_queue(vif->ndev);
1067         memset(vif->bssid, 0, sizeof(vif->bssid));
1068         vif->bss_ch = 0;
1069
1070         ath6kl_tx_data_cleanup(ar);
1071 }
1072
1073 struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar)
1074 {
1075         struct ath6kl_vif *vif;
1076
1077         spin_lock_bh(&ar->list_lock);
1078         if (list_empty(&ar->vif_list)) {
1079                 spin_unlock_bh(&ar->list_lock);
1080                 return NULL;
1081         }
1082
1083         vif = list_first_entry(&ar->vif_list, struct ath6kl_vif, list);
1084
1085         spin_unlock_bh(&ar->list_lock);
1086
1087         return vif;
1088 }
1089
1090 static int ath6kl_open(struct net_device *dev)
1091 {
1092         struct ath6kl_vif *vif = netdev_priv(dev);
1093
1094         set_bit(WLAN_ENABLED, &vif->flags);
1095
1096         if (test_bit(CONNECTED, &vif->flags)) {
1097                 netif_carrier_on(dev);
1098                 netif_wake_queue(dev);
1099         } else {
1100                 netif_carrier_off(dev);
1101         }
1102
1103         return 0;
1104 }
1105
1106 static int ath6kl_close(struct net_device *dev)
1107 {
1108         struct ath6kl_vif *vif = netdev_priv(dev);
1109
1110         netif_stop_queue(dev);
1111
1112         ath6kl_cfg80211_stop(vif);
1113
1114         clear_bit(WLAN_ENABLED, &vif->flags);
1115
1116         return 0;
1117 }
1118
1119 static int ath6kl_set_features(struct net_device *dev,
1120                                netdev_features_t features)
1121 {
1122         struct ath6kl_vif *vif = netdev_priv(dev);
1123         struct ath6kl *ar = vif->ar;
1124         int err = 0;
1125
1126         if ((features & NETIF_F_RXCSUM) &&
1127             (ar->rx_meta_ver != WMI_META_VERSION_2)) {
1128                 ar->rx_meta_ver = WMI_META_VERSION_2;
1129                 err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1130                                                          vif->fw_vif_idx,
1131                                                          ar->rx_meta_ver, 0, 0);
1132                 if (err) {
1133                         dev->features = features & ~NETIF_F_RXCSUM;
1134                         return err;
1135                 }
1136         } else if (!(features & NETIF_F_RXCSUM) &&
1137                    (ar->rx_meta_ver == WMI_META_VERSION_2)) {
1138                 ar->rx_meta_ver = 0;
1139                 err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1140                                                          vif->fw_vif_idx,
1141                                                          ar->rx_meta_ver, 0, 0);
1142                 if (err) {
1143                         dev->features = features | NETIF_F_RXCSUM;
1144                         return err;
1145                 }
1146         }
1147
1148         return err;
1149 }
1150
1151 static void ath6kl_set_multicast_list(struct net_device *ndev)
1152 {
1153         struct ath6kl_vif *vif = netdev_priv(ndev);
1154         bool mc_all_on = false;
1155         int mc_count = netdev_mc_count(ndev);
1156         struct netdev_hw_addr *ha;
1157         bool found;
1158         struct ath6kl_mc_filter *mc_filter, *tmp;
1159         struct list_head mc_filter_new;
1160         int ret;
1161
1162         if (!test_bit(WMI_READY, &vif->ar->flag) ||
1163             !test_bit(WLAN_ENABLED, &vif->flags))
1164                 return;
1165
1166         /* Enable multicast-all filter. */
1167         mc_all_on = !!(ndev->flags & IFF_PROMISC) ||
1168                     !!(ndev->flags & IFF_ALLMULTI) ||
1169                     !!(mc_count > ATH6K_MAX_MC_FILTERS_PER_LIST);
1170
1171         if (mc_all_on)
1172                 set_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1173         else
1174                 clear_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1175
1176         if (test_bit(ATH6KL_FW_CAPABILITY_WOW_MULTICAST_FILTER,
1177                      vif->ar->fw_capabilities)) {
1178                 mc_all_on = mc_all_on || (vif->ar->state == ATH6KL_STATE_ON);
1179         }
1180
1181         if (!(ndev->flags & IFF_MULTICAST)) {
1182                 mc_all_on = false;
1183                 set_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1184         } else {
1185                 clear_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1186         }
1187
1188         /* Enable/disable "multicast-all" filter*/
1189         ath6kl_dbg(ATH6KL_DBG_TRC, "%s multicast-all filter\n",
1190                    mc_all_on ? "enabling" : "disabling");
1191
1192         ret = ath6kl_wmi_mcast_filter_cmd(vif->ar->wmi, vif->fw_vif_idx,
1193                                                   mc_all_on);
1194         if (ret) {
1195                 ath6kl_warn("Failed to %s multicast-all receive\n",
1196                             mc_all_on ? "enable" : "disable");
1197                 return;
1198         }
1199
1200         if (test_bit(NETDEV_MCAST_ALL_ON, &vif->flags))
1201                 return;
1202
1203         /* Keep the driver and firmware mcast list in sync. */
1204         list_for_each_entry_safe(mc_filter, tmp, &vif->mc_filter, list) {
1205                 found = false;
1206                 netdev_for_each_mc_addr(ha, ndev) {
1207                         if (memcmp(ha->addr, mc_filter->hw_addr,
1208                                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1209                                 found = true;
1210                                 break;
1211                         }
1212                 }
1213
1214                 if (!found) {
1215                         /*
1216                          * Delete the filter which was previously set
1217                          * but not in the new request.
1218                          */
1219                         ath6kl_dbg(ATH6KL_DBG_TRC,
1220                                    "Removing %pM from multicast filter\n",
1221                                    mc_filter->hw_addr);
1222                         ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1223                                         vif->fw_vif_idx, mc_filter->hw_addr,
1224                                         false);
1225                         if (ret) {
1226                                 ath6kl_warn("Failed to remove multicast filter:%pM\n",
1227                                             mc_filter->hw_addr);
1228                                 return;
1229                         }
1230
1231                         list_del(&mc_filter->list);
1232                         kfree(mc_filter);
1233                 }
1234         }
1235
1236         INIT_LIST_HEAD(&mc_filter_new);
1237
1238         netdev_for_each_mc_addr(ha, ndev) {
1239                 found = false;
1240                 list_for_each_entry(mc_filter, &vif->mc_filter, list) {
1241                         if (memcmp(ha->addr, mc_filter->hw_addr,
1242                                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1243                                 found = true;
1244                                 break;
1245                         }
1246                 }
1247
1248                 if (!found) {
1249                         mc_filter = kzalloc(sizeof(struct ath6kl_mc_filter),
1250                                             GFP_ATOMIC);
1251                         if (!mc_filter) {
1252                                 WARN_ON(1);
1253                                 goto out;
1254                         }
1255
1256                         memcpy(mc_filter->hw_addr, ha->addr,
1257                                ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE);
1258                         /* Set the multicast filter */
1259                         ath6kl_dbg(ATH6KL_DBG_TRC,
1260                                    "Adding %pM to multicast filter list\n",
1261                                    mc_filter->hw_addr);
1262                         ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1263                                         vif->fw_vif_idx, mc_filter->hw_addr,
1264                                         true);
1265                         if (ret) {
1266                                 ath6kl_warn("Failed to add multicast filter :%pM\n",
1267                                             mc_filter->hw_addr);
1268                                 kfree(mc_filter);
1269                                 goto out;
1270                         }
1271
1272                         list_add_tail(&mc_filter->list, &mc_filter_new);
1273                 }
1274         }
1275
1276 out:
1277         list_splice_tail(&mc_filter_new, &vif->mc_filter);
1278 }
1279
1280 static const struct net_device_ops ath6kl_netdev_ops = {
1281         .ndo_open               = ath6kl_open,
1282         .ndo_stop               = ath6kl_close,
1283         .ndo_start_xmit         = ath6kl_data_tx,
1284         .ndo_set_features       = ath6kl_set_features,
1285         .ndo_set_rx_mode        = ath6kl_set_multicast_list,
1286 };
1287
1288 void init_netdev(struct net_device *dev)
1289 {
1290         struct ath6kl *ar = ath6kl_priv(dev);
1291
1292         dev->netdev_ops = &ath6kl_netdev_ops;
1293         dev->needs_free_netdev = true;
1294         dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1295
1296         dev->needed_headroom = ETH_HLEN;
1297         dev->needed_headroom += roundup(sizeof(struct ath6kl_llc_snap_hdr) +
1298                                         sizeof(struct wmi_data_hdr) +
1299                                         HTC_HDR_LENGTH +
1300                                         WMI_MAX_TX_META_SZ +
1301                                         ATH6KL_HTC_ALIGN_BYTES, 4);
1302
1303         if (!test_bit(ATH6KL_FW_CAPABILITY_NO_IP_CHECKSUM,
1304                       ar->fw_capabilities))
1305                 dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1306
1307         return;
1308 }