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[karo-tx-linux.git] / drivers / net / wireless / ath / ath6kl / main.c
1 /*
2  * Copyright (c) 2004-2011 Atheros Communications Inc.
3  * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
4  *
5  * Permission to use, copy, modify, and/or distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19
20 #include "core.h"
21 #include "hif-ops.h"
22 #include "cfg80211.h"
23 #include "target.h"
24 #include "debug.h"
25
26 struct ath6kl_sta *ath6kl_find_sta(struct ath6kl_vif *vif, u8 *node_addr)
27 {
28         struct ath6kl *ar = vif->ar;
29         struct ath6kl_sta *conn = NULL;
30         u8 i, max_conn;
31
32         max_conn = (vif->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;
33
34         for (i = 0; i < max_conn; i++) {
35                 if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
36                         conn = &ar->sta_list[i];
37                         break;
38                 }
39         }
40
41         return conn;
42 }
43
44 struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
45 {
46         struct ath6kl_sta *conn = NULL;
47         u8 ctr;
48
49         for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
50                 if (ar->sta_list[ctr].aid == aid) {
51                         conn = &ar->sta_list[ctr];
52                         break;
53                 }
54         }
55         return conn;
56 }
57
58 static void ath6kl_add_new_sta(struct ath6kl_vif *vif, u8 *mac, u16 aid,
59                                u8 *wpaie, size_t ielen, u8 keymgmt,
60                                u8 ucipher, u8 auth, u8 apsd_info)
61 {
62         struct ath6kl *ar = vif->ar;
63         struct ath6kl_sta *sta;
64         u8 free_slot;
65
66         free_slot = aid - 1;
67
68         sta = &ar->sta_list[free_slot];
69         memcpy(sta->mac, mac, ETH_ALEN);
70         if (ielen <= ATH6KL_MAX_IE)
71                 memcpy(sta->wpa_ie, wpaie, ielen);
72         sta->aid = aid;
73         sta->keymgmt = keymgmt;
74         sta->ucipher = ucipher;
75         sta->auth = auth;
76         sta->apsd_info = apsd_info;
77
78         ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
79         ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
80         aggr_conn_init(vif, vif->aggr_cntxt, sta->aggr_conn);
81 }
82
83 static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
84 {
85         struct ath6kl_sta *sta = &ar->sta_list[i];
86         struct ath6kl_mgmt_buff *entry, *tmp;
87
88         /* empty the queued pkts in the PS queue if any */
89         spin_lock_bh(&sta->psq_lock);
90         skb_queue_purge(&sta->psq);
91         skb_queue_purge(&sta->apsdq);
92
93         if (sta->mgmt_psq_len != 0) {
94                 list_for_each_entry_safe(entry, tmp, &sta->mgmt_psq, list) {
95                         kfree(entry);
96                 }
97                 INIT_LIST_HEAD(&sta->mgmt_psq);
98                 sta->mgmt_psq_len = 0;
99         }
100
101         spin_unlock_bh(&sta->psq_lock);
102
103         memset(&ar->ap_stats.sta[sta->aid - 1], 0,
104                sizeof(struct wmi_per_sta_stat));
105         memset(sta->mac, 0, ETH_ALEN);
106         memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
107         sta->aid = 0;
108         sta->sta_flags = 0;
109
110         ar->sta_list_index = ar->sta_list_index & ~(1 << i);
111         aggr_reset_state(sta->aggr_conn);
112 }
113
114 static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
115 {
116         u8 i, removed = 0;
117
118         if (is_zero_ether_addr(mac))
119                 return removed;
120
121         if (is_broadcast_ether_addr(mac)) {
122                 ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");
123
124                 for (i = 0; i < AP_MAX_NUM_STA; i++) {
125                         if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
126                                 ath6kl_sta_cleanup(ar, i);
127                                 removed = 1;
128                         }
129                 }
130         } else {
131                 for (i = 0; i < AP_MAX_NUM_STA; i++) {
132                         if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
133                                 ath6kl_dbg(ATH6KL_DBG_TRC,
134                                            "deleting station %pM aid=%d reason=%d\n",
135                                            mac, ar->sta_list[i].aid, reason);
136                                 ath6kl_sta_cleanup(ar, i);
137                                 removed = 1;
138                                 break;
139                         }
140                 }
141         }
142
143         return removed;
144 }
145
146 enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
147 {
148         struct ath6kl *ar = devt;
149         return ar->ac2ep_map[ac];
150 }
151
152 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
153 {
154         struct ath6kl_cookie *cookie;
155
156         cookie = ar->cookie_list;
157         if (cookie != NULL) {
158                 ar->cookie_list = cookie->arc_list_next;
159                 ar->cookie_count--;
160         }
161
162         return cookie;
163 }
164
165 void ath6kl_cookie_init(struct ath6kl *ar)
166 {
167         u32 i;
168
169         ar->cookie_list = NULL;
170         ar->cookie_count = 0;
171
172         memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));
173
174         for (i = 0; i < MAX_COOKIE_NUM; i++)
175                 ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
176 }
177
178 void ath6kl_cookie_cleanup(struct ath6kl *ar)
179 {
180         ar->cookie_list = NULL;
181         ar->cookie_count = 0;
182 }
183
184 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
185 {
186         /* Insert first */
187
188         if (!ar || !cookie)
189                 return;
190
191         cookie->arc_list_next = ar->cookie_list;
192         ar->cookie_list = cookie;
193         ar->cookie_count++;
194 }
195
196 /*
197  * Read from the hardware through its diagnostic window. No cooperation
198  * from the firmware is required for this.
199  */
200 int ath6kl_diag_read32(struct ath6kl *ar, u32 address, u32 *value)
201 {
202         int ret;
203
204         ret = ath6kl_hif_diag_read32(ar, address, value);
205         if (ret) {
206                 ath6kl_warn("failed to read32 through diagnose window: %d\n",
207                             ret);
208                 return ret;
209         }
210
211         return 0;
212 }
213
214 /*
215  * Write to the ATH6KL through its diagnostic window. No cooperation from
216  * the Target is required for this.
217  */
218 int ath6kl_diag_write32(struct ath6kl *ar, u32 address, __le32 value)
219 {
220         int ret;
221
222         ret = ath6kl_hif_diag_write32(ar, address, value);
223
224         if (ret) {
225                 ath6kl_err("failed to write 0x%x during diagnose window to 0x%d\n",
226                            address, value);
227                 return ret;
228         }
229
230         return 0;
231 }
232
233 int ath6kl_diag_read(struct ath6kl *ar, u32 address, void *data, u32 length)
234 {
235         u32 count, *buf = data;
236         int ret;
237
238         if (WARN_ON(length % 4))
239                 return -EINVAL;
240
241         for (count = 0; count < length / 4; count++, address += 4) {
242                 ret = ath6kl_diag_read32(ar, address, &buf[count]);
243                 if (ret)
244                         return ret;
245         }
246
247         return 0;
248 }
249
250 int ath6kl_diag_write(struct ath6kl *ar, u32 address, void *data, u32 length)
251 {
252         u32 count;
253         __le32 *buf = data;
254         int ret;
255
256         if (WARN_ON(length % 4))
257                 return -EINVAL;
258
259         for (count = 0; count < length / 4; count++, address += 4) {
260                 ret = ath6kl_diag_write32(ar, address, buf[count]);
261                 if (ret)
262                         return ret;
263         }
264
265         return 0;
266 }
267
268 int ath6kl_read_fwlogs(struct ath6kl *ar)
269 {
270         struct ath6kl_dbglog_hdr debug_hdr;
271         struct ath6kl_dbglog_buf debug_buf;
272         u32 address, length, dropped, firstbuf, debug_hdr_addr;
273         int ret, loop;
274         u8 *buf;
275
276         buf = kmalloc(ATH6KL_FWLOG_PAYLOAD_SIZE, GFP_KERNEL);
277         if (!buf)
278                 return -ENOMEM;
279
280         address = TARG_VTOP(ar->target_type,
281                             ath6kl_get_hi_item_addr(ar,
282                                                     HI_ITEM(hi_dbglog_hdr)));
283
284         ret = ath6kl_diag_read32(ar, address, &debug_hdr_addr);
285         if (ret)
286                 goto out;
287
288         /* Get the contents of the ring buffer */
289         if (debug_hdr_addr == 0) {
290                 ath6kl_warn("Invalid address for debug_hdr_addr\n");
291                 ret = -EINVAL;
292                 goto out;
293         }
294
295         address = TARG_VTOP(ar->target_type, debug_hdr_addr);
296         ret = ath6kl_diag_read(ar, address, &debug_hdr, sizeof(debug_hdr));
297         if (ret)
298                 goto out;
299
300         address = TARG_VTOP(ar->target_type,
301                             le32_to_cpu(debug_hdr.dbuf_addr));
302         firstbuf = address;
303         dropped = le32_to_cpu(debug_hdr.dropped);
304         ret = ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf));
305         if (ret)
306                 goto out;
307
308         loop = 100;
309
310         do {
311                 address = TARG_VTOP(ar->target_type,
312                                     le32_to_cpu(debug_buf.buffer_addr));
313                 length = le32_to_cpu(debug_buf.length);
314
315                 if (length != 0 && (le32_to_cpu(debug_buf.length) <=
316                                     le32_to_cpu(debug_buf.bufsize))) {
317                         length = ALIGN(length, 4);
318
319                         ret = ath6kl_diag_read(ar, address,
320                                                buf, length);
321                         if (ret)
322                                 goto out;
323
324                         ath6kl_debug_fwlog_event(ar, buf, length);
325                 }
326
327                 address = TARG_VTOP(ar->target_type,
328                                     le32_to_cpu(debug_buf.next));
329                 ret = ath6kl_diag_read(ar, address, &debug_buf,
330                                        sizeof(debug_buf));
331                 if (ret)
332                         goto out;
333
334                 loop--;
335
336                 if (WARN_ON(loop == 0)) {
337                         ret = -ETIMEDOUT;
338                         goto out;
339                 }
340         } while (address != firstbuf);
341
342 out:
343         kfree(buf);
344
345         return ret;
346 }
347
348 /* FIXME: move to a better place, target.h? */
349 #define AR6003_RESET_CONTROL_ADDRESS 0x00004000
350 #define AR6004_RESET_CONTROL_ADDRESS 0x00004000
351
352 void ath6kl_reset_device(struct ath6kl *ar, u32 target_type,
353                          bool wait_fot_compltn, bool cold_reset)
354 {
355         int status = 0;
356         u32 address;
357         __le32 data;
358
359         if (target_type != TARGET_TYPE_AR6003 &&
360             target_type != TARGET_TYPE_AR6004)
361                 return;
362
363         data = cold_reset ? cpu_to_le32(RESET_CONTROL_COLD_RST) :
364                             cpu_to_le32(RESET_CONTROL_MBOX_RST);
365
366         switch (target_type) {
367         case TARGET_TYPE_AR6003:
368                 address = AR6003_RESET_CONTROL_ADDRESS;
369                 break;
370         case TARGET_TYPE_AR6004:
371                 address = AR6004_RESET_CONTROL_ADDRESS;
372                 break;
373         }
374
375         status = ath6kl_diag_write32(ar, address, data);
376
377         if (status)
378                 ath6kl_err("failed to reset target\n");
379 }
380
381 static void ath6kl_install_static_wep_keys(struct ath6kl_vif *vif)
382 {
383         u8 index;
384         u8 keyusage;
385
386         for (index = 0; index <= WMI_MAX_KEY_INDEX; index++) {
387                 if (vif->wep_key_list[index].key_len) {
388                         keyusage = GROUP_USAGE;
389                         if (index == vif->def_txkey_index)
390                                 keyusage |= TX_USAGE;
391
392                         ath6kl_wmi_addkey_cmd(vif->ar->wmi, vif->fw_vif_idx,
393                                               index,
394                                               WEP_CRYPT,
395                                               keyusage,
396                                               vif->wep_key_list[index].key_len,
397                                               NULL, 0,
398                                               vif->wep_key_list[index].key,
399                                               KEY_OP_INIT_VAL, NULL,
400                                               NO_SYNC_WMIFLAG);
401                 }
402         }
403 }
404
405 void ath6kl_connect_ap_mode_bss(struct ath6kl_vif *vif, u16 channel)
406 {
407         struct ath6kl *ar = vif->ar;
408         struct ath6kl_req_key *ik;
409         int res;
410         u8 key_rsc[ATH6KL_KEY_SEQ_LEN];
411
412         ik = &ar->ap_mode_bkey;
413
414         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "AP mode started on %u MHz\n", channel);
415
416         switch (vif->auth_mode) {
417         case NONE_AUTH:
418                 if (vif->prwise_crypto == WEP_CRYPT)
419                         ath6kl_install_static_wep_keys(vif);
420                 if (!ik->valid || ik->key_type != WAPI_CRYPT)
421                         break;
422                 /* for WAPI, we need to set the delayed group key, continue: */
423         case WPA_PSK_AUTH:
424         case WPA2_PSK_AUTH:
425         case (WPA_PSK_AUTH | WPA2_PSK_AUTH):
426                 if (!ik->valid)
427                         break;
428
429                 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
430                            "Delayed addkey for the initial group key for AP mode\n");
431                 memset(key_rsc, 0, sizeof(key_rsc));
432                 res = ath6kl_wmi_addkey_cmd(
433                         ar->wmi, vif->fw_vif_idx, ik->key_index, ik->key_type,
434                         GROUP_USAGE, ik->key_len, key_rsc, ATH6KL_KEY_SEQ_LEN,
435                         ik->key,
436                         KEY_OP_INIT_VAL, NULL, SYNC_BOTH_WMIFLAG);
437                 if (res) {
438                         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
439                                    "Delayed addkey failed: %d\n", res);
440                 }
441                 break;
442         }
443
444         if (ar->last_ch != channel)
445                 /* we actually don't know the phymode, default to HT20 */
446                 ath6kl_cfg80211_ch_switch_notify(vif, channel, WMI_11G_HT20);
447
448         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, NONE_BSS_FILTER, 0);
449         set_bit(CONNECTED, &vif->flags);
450         netif_carrier_on(vif->ndev);
451 }
452
453 void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr,
454                                 u8 keymgmt, u8 ucipher, u8 auth,
455                                 u8 assoc_req_len, u8 *assoc_info, u8 apsd_info)
456 {
457         u8 *ies = NULL, *wpa_ie = NULL, *pos;
458         size_t ies_len = 0;
459         struct station_info sinfo;
460
461         ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid);
462
463         if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
464                 struct ieee80211_mgmt *mgmt =
465                         (struct ieee80211_mgmt *) assoc_info;
466                 if (ieee80211_is_assoc_req(mgmt->frame_control) &&
467                     assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
468                     sizeof(mgmt->u.assoc_req)) {
469                         ies = mgmt->u.assoc_req.variable;
470                         ies_len = assoc_info + assoc_req_len - ies;
471                 } else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
472                            assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
473                            + sizeof(mgmt->u.reassoc_req)) {
474                         ies = mgmt->u.reassoc_req.variable;
475                         ies_len = assoc_info + assoc_req_len - ies;
476                 }
477         }
478
479         pos = ies;
480         while (pos && pos + 1 < ies + ies_len) {
481                 if (pos + 2 + pos[1] > ies + ies_len)
482                         break;
483                 if (pos[0] == WLAN_EID_RSN)
484                         wpa_ie = pos; /* RSN IE */
485                 else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
486                          pos[1] >= 4 &&
487                          pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
488                         if (pos[5] == 0x01)
489                                 wpa_ie = pos; /* WPA IE */
490                         else if (pos[5] == 0x04) {
491                                 wpa_ie = pos; /* WPS IE */
492                                 break; /* overrides WPA/RSN IE */
493                         }
494                 } else if (pos[0] == 0x44 && wpa_ie == NULL) {
495                         /*
496                          * Note: WAPI Parameter Set IE re-uses Element ID that
497                          * was officially allocated for BSS AC Access Delay. As
498                          * such, we need to be a bit more careful on when
499                          * parsing the frame. However, BSS AC Access Delay
500                          * element is not supposed to be included in
501                          * (Re)Association Request frames, so this should not
502                          * cause problems.
503                          */
504                         wpa_ie = pos; /* WAPI IE */
505                         break;
506                 }
507                 pos += 2 + pos[1];
508         }
509
510         ath6kl_add_new_sta(vif, mac_addr, aid, wpa_ie,
511                            wpa_ie ? 2 + wpa_ie[1] : 0,
512                            keymgmt, ucipher, auth, apsd_info);
513
514         /* send event to application */
515         memset(&sinfo, 0, sizeof(sinfo));
516
517         /* TODO: sinfo.generation */
518
519         sinfo.assoc_req_ies = ies;
520         sinfo.assoc_req_ies_len = ies_len;
521         sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
522
523         cfg80211_new_sta(vif->ndev, mac_addr, &sinfo, GFP_KERNEL);
524
525         netif_wake_queue(vif->ndev);
526 }
527
528 void disconnect_timer_handler(unsigned long ptr)
529 {
530         struct net_device *dev = (struct net_device *)ptr;
531         struct ath6kl_vif *vif = netdev_priv(dev);
532
533         ath6kl_init_profile_info(vif);
534         ath6kl_disconnect(vif);
535 }
536
537 void ath6kl_disconnect(struct ath6kl_vif *vif)
538 {
539         if (test_bit(CONNECTED, &vif->flags) ||
540             test_bit(CONNECT_PEND, &vif->flags)) {
541                 ath6kl_wmi_disconnect_cmd(vif->ar->wmi, vif->fw_vif_idx);
542                 /*
543                  * Disconnect command is issued, clear the connect pending
544                  * flag. The connected flag will be cleared in
545                  * disconnect event notification.
546                  */
547                 clear_bit(CONNECT_PEND, &vif->flags);
548         }
549 }
550
551 /* WMI Event handlers */
552
553 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver,
554                         enum wmi_phy_cap cap)
555 {
556         struct ath6kl *ar = devt;
557
558         memcpy(ar->mac_addr, datap, ETH_ALEN);
559
560         ath6kl_dbg(ATH6KL_DBG_BOOT,
561                    "ready event mac addr %pM sw_ver 0x%x abi_ver 0x%x cap 0x%x\n",
562                    ar->mac_addr, sw_ver, abi_ver, cap);
563
564         ar->version.wlan_ver = sw_ver;
565         ar->version.abi_ver = abi_ver;
566         ar->hw.cap = cap;
567
568         if (strlen(ar->wiphy->fw_version) == 0) {
569                 snprintf(ar->wiphy->fw_version,
570                          sizeof(ar->wiphy->fw_version),
571                          "%u.%u.%u.%u",
572                          (ar->version.wlan_ver & 0xf0000000) >> 28,
573                          (ar->version.wlan_ver & 0x0f000000) >> 24,
574                          (ar->version.wlan_ver & 0x00ff0000) >> 16,
575                          (ar->version.wlan_ver & 0x0000ffff));
576         }
577
578         /* indicate to the waiting thread that the ready event was received */
579         set_bit(WMI_READY, &ar->flag);
580         wake_up(&ar->event_wq);
581 }
582
583 void ath6kl_scan_complete_evt(struct ath6kl_vif *vif, int status)
584 {
585         struct ath6kl *ar = vif->ar;
586         bool aborted = false;
587
588         if (status != WMI_SCAN_STATUS_SUCCESS)
589                 aborted = true;
590
591         ath6kl_cfg80211_scan_complete_event(vif, aborted);
592
593         if (!ar->usr_bss_filter) {
594                 clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
595                 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
596                                          NONE_BSS_FILTER, 0);
597         }
598
599         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "scan complete: %d\n", status);
600 }
601
602 static int ath6kl_commit_ch_switch(struct ath6kl_vif *vif, u16 channel)
603 {
604
605         struct ath6kl *ar = vif->ar;
606
607         vif->profile.ch = cpu_to_le16(channel);
608
609         switch (vif->nw_type) {
610         case AP_NETWORK:
611                 /*
612                  * reconfigure any saved RSN IE capabilites in the beacon /
613                  * probe response to stay in sync with the supplicant.
614                  */
615                 if (vif->rsn_capab &&
616                     test_bit(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
617                              ar->fw_capabilities))
618                         ath6kl_wmi_set_ie_cmd(ar->wmi, vif->fw_vif_idx,
619                                               WLAN_EID_RSN, WMI_RSN_IE_CAPB,
620                                               (const u8 *) &vif->rsn_capab,
621                                               sizeof(vif->rsn_capab));
622
623                 return ath6kl_wmi_ap_profile_commit(ar->wmi, vif->fw_vif_idx,
624                                                     &vif->profile);
625         default:
626                 ath6kl_err("won't switch channels nw_type=%d\n", vif->nw_type);
627                 return -ENOTSUPP;
628         }
629 }
630
631 static void ath6kl_check_ch_switch(struct ath6kl *ar, u16 channel)
632 {
633
634         struct ath6kl_vif *vif;
635         int res = 0;
636
637         if (!ar->want_ch_switch)
638                 return;
639
640         spin_lock_bh(&ar->list_lock);
641         list_for_each_entry(vif, &ar->vif_list, list) {
642                 if (ar->want_ch_switch & (1 << vif->fw_vif_idx))
643                         res = ath6kl_commit_ch_switch(vif, channel);
644
645                 /* if channel switch failed, oh well we tried */
646                 ar->want_ch_switch &= ~(1 << vif->fw_vif_idx);
647
648                 if (res)
649                         ath6kl_err("channel switch failed nw_type %d res %d\n",
650                                    vif->nw_type, res);
651         }
652         spin_unlock_bh(&ar->list_lock);
653 }
654
655 void ath6kl_connect_event(struct ath6kl_vif *vif, u16 channel, u8 *bssid,
656                           u16 listen_int, u16 beacon_int,
657                           enum network_type net_type, u8 beacon_ie_len,
658                           u8 assoc_req_len, u8 assoc_resp_len,
659                           u8 *assoc_info)
660 {
661         struct ath6kl *ar = vif->ar;
662
663         ath6kl_cfg80211_connect_event(vif, channel, bssid,
664                                       listen_int, beacon_int,
665                                       net_type, beacon_ie_len,
666                                       assoc_req_len, assoc_resp_len,
667                                       assoc_info);
668
669         memcpy(vif->bssid, bssid, sizeof(vif->bssid));
670         vif->bss_ch = channel;
671
672         if ((vif->nw_type == INFRA_NETWORK)) {
673                 ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
674                                               vif->listen_intvl_t, 0);
675                 ath6kl_check_ch_switch(ar, channel);
676         }
677
678         netif_wake_queue(vif->ndev);
679
680         /* Update connect & link status atomically */
681         spin_lock_bh(&vif->if_lock);
682         set_bit(CONNECTED, &vif->flags);
683         clear_bit(CONNECT_PEND, &vif->flags);
684         netif_carrier_on(vif->ndev);
685         spin_unlock_bh(&vif->if_lock);
686
687         aggr_reset_state(vif->aggr_cntxt->aggr_conn);
688         vif->reconnect_flag = 0;
689
690         if ((vif->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
691                 memset(ar->node_map, 0, sizeof(ar->node_map));
692                 ar->node_num = 0;
693                 ar->next_ep_id = ENDPOINT_2;
694         }
695
696         if (!ar->usr_bss_filter) {
697                 set_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
698                 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
699                                          CURRENT_BSS_FILTER, 0);
700         }
701 }
702
703 void ath6kl_tkip_micerr_event(struct ath6kl_vif *vif, u8 keyid, bool ismcast)
704 {
705         struct ath6kl_sta *sta;
706         struct ath6kl *ar = vif->ar;
707         u8 tsc[6];
708
709         /*
710          * For AP case, keyid will have aid of STA which sent pkt with
711          * MIC error. Use this aid to get MAC & send it to hostapd.
712          */
713         if (vif->nw_type == AP_NETWORK) {
714                 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
715                 if (!sta)
716                         return;
717
718                 ath6kl_dbg(ATH6KL_DBG_TRC,
719                            "ap tkip mic error received from aid=%d\n", keyid);
720
721                 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
722                 cfg80211_michael_mic_failure(vif->ndev, sta->mac,
723                                              NL80211_KEYTYPE_PAIRWISE, keyid,
724                                              tsc, GFP_KERNEL);
725         } else
726                 ath6kl_cfg80211_tkip_micerr_event(vif, keyid, ismcast);
727
728 }
729
730 static void ath6kl_update_target_stats(struct ath6kl_vif *vif, u8 *ptr, u32 len)
731 {
732         struct wmi_target_stats *tgt_stats =
733                 (struct wmi_target_stats *) ptr;
734         struct ath6kl *ar = vif->ar;
735         struct target_stats *stats = &vif->target_stats;
736         struct tkip_ccmp_stats *ccmp_stats;
737         u8 ac;
738
739         if (len < sizeof(*tgt_stats))
740                 return;
741
742         ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
743
744         stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
745         stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
746         stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
747         stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
748         stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
749         stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
750         stats->tx_bcast_pkt  += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
751         stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
752         stats->tx_rts_success_cnt +=
753                 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
754
755         for (ac = 0; ac < WMM_NUM_AC; ac++)
756                 stats->tx_pkt_per_ac[ac] +=
757                         le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
758
759         stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
760         stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
761         stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
762         stats->tx_mult_retry_cnt +=
763                 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
764         stats->tx_rts_fail_cnt +=
765                 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
766         stats->tx_ucast_rate =
767             ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate));
768
769         stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
770         stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
771         stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
772         stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
773         stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
774         stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
775         stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
776         stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
777         stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
778         stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
779         stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
780         stats->rx_key_cache_miss +=
781                 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
782         stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
783         stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
784         stats->rx_ucast_rate =
785             ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate));
786
787         ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
788
789         stats->tkip_local_mic_fail +=
790                 le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
791         stats->tkip_cnter_measures_invoked +=
792                 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
793         stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
794
795         stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
796         stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
797
798         stats->pwr_save_fail_cnt +=
799                 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
800         stats->noise_floor_calib =
801                 a_sle32_to_cpu(tgt_stats->noise_floor_calib);
802
803         stats->cs_bmiss_cnt +=
804                 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
805         stats->cs_low_rssi_cnt +=
806                 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
807         stats->cs_connect_cnt +=
808                 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
809         stats->cs_discon_cnt +=
810                 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
811
812         stats->cs_ave_beacon_rssi =
813                 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
814
815         stats->cs_last_roam_msec =
816                 tgt_stats->cserv_stats.cs_last_roam_msec;
817         stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
818         stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
819
820         stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
821
822         stats->wow_pkt_dropped +=
823                 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
824         stats->wow_host_pkt_wakeups +=
825                 tgt_stats->wow_stats.wow_host_pkt_wakeups;
826         stats->wow_host_evt_wakeups +=
827                 tgt_stats->wow_stats.wow_host_evt_wakeups;
828         stats->wow_evt_discarded +=
829                 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
830
831         stats->arp_received = le32_to_cpu(tgt_stats->arp_stats.arp_received);
832         stats->arp_replied = le32_to_cpu(tgt_stats->arp_stats.arp_replied);
833         stats->arp_matched = le32_to_cpu(tgt_stats->arp_stats.arp_matched);
834
835         if (test_bit(STATS_UPDATE_PEND, &vif->flags)) {
836                 clear_bit(STATS_UPDATE_PEND, &vif->flags);
837                 wake_up(&ar->event_wq);
838         }
839 }
840
841 static void ath6kl_add_le32(__le32 *var, __le32 val)
842 {
843         *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
844 }
845
846 void ath6kl_tgt_stats_event(struct ath6kl_vif *vif, u8 *ptr, u32 len)
847 {
848         struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
849         struct ath6kl *ar = vif->ar;
850         struct wmi_ap_mode_stat *ap = &ar->ap_stats;
851         struct wmi_per_sta_stat *st_ap, *st_p;
852         u8 ac;
853
854         if (vif->nw_type == AP_NETWORK) {
855                 if (len < sizeof(*p))
856                         return;
857
858                 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
859                         st_ap = &ap->sta[ac];
860                         st_p = &p->sta[ac];
861
862                         ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
863                         ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
864                         ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
865                         ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
866                         ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
867                         ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
868                         ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
869                         ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
870                 }
871
872         } else {
873                 ath6kl_update_target_stats(vif, ptr, len);
874         }
875 }
876
877 void ath6kl_wakeup_event(void *dev)
878 {
879         struct ath6kl *ar = (struct ath6kl *) dev;
880
881         wake_up(&ar->event_wq);
882 }
883
884 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
885 {
886         struct ath6kl *ar = (struct ath6kl *) devt;
887
888         ar->tx_pwr = tx_pwr;
889         wake_up(&ar->event_wq);
890 }
891
892 void ath6kl_pspoll_event(struct ath6kl_vif *vif, u8 aid)
893 {
894         struct ath6kl_sta *conn;
895         struct sk_buff *skb;
896         bool psq_empty = false;
897         struct ath6kl *ar = vif->ar;
898         struct ath6kl_mgmt_buff *mgmt_buf;
899
900         conn = ath6kl_find_sta_by_aid(ar, aid);
901
902         if (!conn)
903                 return;
904         /*
905          * Send out a packet queued on ps queue. When the ps queue
906          * becomes empty update the PVB for this station.
907          */
908         spin_lock_bh(&conn->psq_lock);
909         psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
910         spin_unlock_bh(&conn->psq_lock);
911
912         if (psq_empty)
913                 /* TODO: Send out a NULL data frame */
914                 return;
915
916         spin_lock_bh(&conn->psq_lock);
917         if (conn->mgmt_psq_len > 0) {
918                 mgmt_buf = list_first_entry(&conn->mgmt_psq,
919                                         struct ath6kl_mgmt_buff, list);
920                 list_del(&mgmt_buf->list);
921                 conn->mgmt_psq_len--;
922                 spin_unlock_bh(&conn->psq_lock);
923
924                 conn->sta_flags |= STA_PS_POLLED;
925                 ath6kl_wmi_send_mgmt_cmd(ar->wmi, vif->fw_vif_idx,
926                                          mgmt_buf->id, mgmt_buf->freq,
927                                          mgmt_buf->wait, mgmt_buf->buf,
928                                          mgmt_buf->len, mgmt_buf->no_cck);
929                 conn->sta_flags &= ~STA_PS_POLLED;
930                 kfree(mgmt_buf);
931         } else {
932                 skb = skb_dequeue(&conn->psq);
933                 spin_unlock_bh(&conn->psq_lock);
934
935                 conn->sta_flags |= STA_PS_POLLED;
936                 ath6kl_data_tx(skb, vif->ndev);
937                 conn->sta_flags &= ~STA_PS_POLLED;
938         }
939
940         spin_lock_bh(&conn->psq_lock);
941         psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
942         spin_unlock_bh(&conn->psq_lock);
943
944         if (psq_empty)
945                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, conn->aid, 0);
946 }
947
948 void ath6kl_dtimexpiry_event(struct ath6kl_vif *vif)
949 {
950         bool mcastq_empty = false;
951         struct sk_buff *skb;
952         struct ath6kl *ar = vif->ar;
953
954         /*
955          * If there are no associated STAs, ignore the DTIM expiry event.
956          * There can be potential race conditions where the last associated
957          * STA may disconnect & before the host could clear the 'Indicate
958          * DTIM' request to the firmware, the firmware would have just
959          * indicated a DTIM expiry event. The race is between 'clear DTIM
960          * expiry cmd' going from the host to the firmware & the DTIM
961          * expiry event happening from the firmware to the host.
962          */
963         if (!ar->sta_list_index)
964                 return;
965
966         spin_lock_bh(&ar->mcastpsq_lock);
967         mcastq_empty = skb_queue_empty(&ar->mcastpsq);
968         spin_unlock_bh(&ar->mcastpsq_lock);
969
970         if (mcastq_empty)
971                 return;
972
973         /* set the STA flag to dtim_expired for the frame to go out */
974         set_bit(DTIM_EXPIRED, &vif->flags);
975
976         spin_lock_bh(&ar->mcastpsq_lock);
977         while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
978                 spin_unlock_bh(&ar->mcastpsq_lock);
979
980                 ath6kl_data_tx(skb, vif->ndev);
981
982                 spin_lock_bh(&ar->mcastpsq_lock);
983         }
984         spin_unlock_bh(&ar->mcastpsq_lock);
985
986         clear_bit(DTIM_EXPIRED, &vif->flags);
987
988         /* clear the LSB of the BitMapCtl field of the TIM IE */
989         ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, MCAST_AID, 0);
990 }
991
992 void ath6kl_disconnect_event(struct ath6kl_vif *vif, u8 reason, u8 *bssid,
993                              u8 assoc_resp_len, u8 *assoc_info,
994                              u16 prot_reason_status)
995 {
996         struct ath6kl *ar = vif->ar;
997
998         if (vif->nw_type == AP_NETWORK) {
999                 /* disconnect due to other STA vif switching channels */
1000                 if (reason == BSS_DISCONNECTED &&
1001                     prot_reason_status == WMI_AP_REASON_STA_ROAM) {
1002                         ar->want_ch_switch |= 1 << vif->fw_vif_idx;
1003                         /* bail back to this channel if STA vif fails connect */
1004                         ar->last_ch = le16_to_cpu(vif->profile.ch);
1005                 }
1006
1007                 if (prot_reason_status == WMI_AP_REASON_MAX_STA) {
1008                         /* send max client reached notification to user space */
1009                         cfg80211_conn_failed(vif->ndev, bssid,
1010                                              NL80211_CONN_FAIL_MAX_CLIENTS,
1011                                              GFP_KERNEL);
1012                 }
1013
1014                 if (prot_reason_status == WMI_AP_REASON_ACL) {
1015                         /* send blocked client notification to user space */
1016                         cfg80211_conn_failed(vif->ndev, bssid,
1017                                              NL80211_CONN_FAIL_BLOCKED_CLIENT,
1018                                              GFP_KERNEL);
1019                 }
1020
1021                 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
1022                         return;
1023
1024                 /* if no more associated STAs, empty the mcast PS q */
1025                 if (ar->sta_list_index == 0) {
1026                         spin_lock_bh(&ar->mcastpsq_lock);
1027                         skb_queue_purge(&ar->mcastpsq);
1028                         spin_unlock_bh(&ar->mcastpsq_lock);
1029
1030                         /* clear the LSB of the TIM IE's BitMapCtl field */
1031                         if (test_bit(WMI_READY, &ar->flag))
1032                                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1033                                                        MCAST_AID, 0);
1034                 }
1035
1036                 if (!is_broadcast_ether_addr(bssid)) {
1037                         /* send event to application */
1038                         cfg80211_del_sta(vif->ndev, bssid, GFP_KERNEL);
1039                 }
1040
1041                 if (memcmp(vif->ndev->dev_addr, bssid, ETH_ALEN) == 0) {
1042                         memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
1043                         clear_bit(CONNECTED, &vif->flags);
1044                 }
1045                 return;
1046         }
1047
1048         ath6kl_cfg80211_disconnect_event(vif, reason, bssid,
1049                                          assoc_resp_len, assoc_info,
1050                                          prot_reason_status);
1051
1052         aggr_reset_state(vif->aggr_cntxt->aggr_conn);
1053
1054         del_timer(&vif->disconnect_timer);
1055
1056         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "disconnect reason is %d\n", reason);
1057
1058         /*
1059          * If the event is due to disconnect cmd from the host, only they
1060          * the target would stop trying to connect. Under any other
1061          * condition, target would keep trying to connect.
1062          */
1063         if (reason == DISCONNECT_CMD) {
1064                 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1065                         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
1066                                                  NONE_BSS_FILTER, 0);
1067         } else {
1068                 set_bit(CONNECT_PEND, &vif->flags);
1069                 if (((reason == ASSOC_FAILED) &&
1070                      (prot_reason_status == 0x11)) ||
1071                     ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) &&
1072                      (vif->reconnect_flag == 1))) {
1073                         set_bit(CONNECTED, &vif->flags);
1074                         return;
1075                 }
1076         }
1077
1078         /* restart disconnected concurrent vifs waiting for new channel */
1079         ath6kl_check_ch_switch(ar, ar->last_ch);
1080
1081         /* update connect & link status atomically */
1082         spin_lock_bh(&vif->if_lock);
1083         clear_bit(CONNECTED, &vif->flags);
1084         netif_carrier_off(vif->ndev);
1085         spin_unlock_bh(&vif->if_lock);
1086
1087         if ((reason != CSERV_DISCONNECT) || (vif->reconnect_flag != 1))
1088                 vif->reconnect_flag = 0;
1089
1090         if (reason != CSERV_DISCONNECT)
1091                 ar->user_key_ctrl = 0;
1092
1093         netif_stop_queue(vif->ndev);
1094         memset(vif->bssid, 0, sizeof(vif->bssid));
1095         vif->bss_ch = 0;
1096
1097         ath6kl_tx_data_cleanup(ar);
1098 }
1099
1100 struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar)
1101 {
1102         struct ath6kl_vif *vif;
1103
1104         spin_lock_bh(&ar->list_lock);
1105         if (list_empty(&ar->vif_list)) {
1106                 spin_unlock_bh(&ar->list_lock);
1107                 return NULL;
1108         }
1109
1110         vif = list_first_entry(&ar->vif_list, struct ath6kl_vif, list);
1111
1112         spin_unlock_bh(&ar->list_lock);
1113
1114         return vif;
1115 }
1116
1117 static int ath6kl_open(struct net_device *dev)
1118 {
1119         struct ath6kl_vif *vif = netdev_priv(dev);
1120
1121         set_bit(WLAN_ENABLED, &vif->flags);
1122
1123         if (test_bit(CONNECTED, &vif->flags)) {
1124                 netif_carrier_on(dev);
1125                 netif_wake_queue(dev);
1126         } else
1127                 netif_carrier_off(dev);
1128
1129         return 0;
1130 }
1131
1132 static int ath6kl_close(struct net_device *dev)
1133 {
1134         struct ath6kl_vif *vif = netdev_priv(dev);
1135
1136         netif_stop_queue(dev);
1137
1138         ath6kl_cfg80211_stop(vif);
1139
1140         clear_bit(WLAN_ENABLED, &vif->flags);
1141
1142         return 0;
1143 }
1144
1145 static struct net_device_stats *ath6kl_get_stats(struct net_device *dev)
1146 {
1147         struct ath6kl_vif *vif = netdev_priv(dev);
1148
1149         return &vif->net_stats;
1150 }
1151
1152 static int ath6kl_set_features(struct net_device *dev,
1153                                netdev_features_t features)
1154 {
1155         struct ath6kl_vif *vif = netdev_priv(dev);
1156         struct ath6kl *ar = vif->ar;
1157         int err = 0;
1158
1159         if ((features & NETIF_F_RXCSUM) &&
1160             (ar->rx_meta_ver != WMI_META_VERSION_2)) {
1161                 ar->rx_meta_ver = WMI_META_VERSION_2;
1162                 err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1163                                                          vif->fw_vif_idx,
1164                                                          ar->rx_meta_ver, 0, 0);
1165                 if (err) {
1166                         dev->features = features & ~NETIF_F_RXCSUM;
1167                         return err;
1168                 }
1169         } else if (!(features & NETIF_F_RXCSUM) &&
1170                    (ar->rx_meta_ver == WMI_META_VERSION_2)) {
1171                 ar->rx_meta_ver = 0;
1172                 err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1173                                                          vif->fw_vif_idx,
1174                                                          ar->rx_meta_ver, 0, 0);
1175                 if (err) {
1176                         dev->features = features | NETIF_F_RXCSUM;
1177                         return err;
1178                 }
1179
1180         }
1181
1182         return err;
1183 }
1184
1185 static void ath6kl_set_multicast_list(struct net_device *ndev)
1186 {
1187         struct ath6kl_vif *vif = netdev_priv(ndev);
1188         bool mc_all_on = false;
1189         int mc_count = netdev_mc_count(ndev);
1190         struct netdev_hw_addr *ha;
1191         bool found;
1192         struct ath6kl_mc_filter *mc_filter, *tmp;
1193         struct list_head mc_filter_new;
1194         int ret;
1195
1196         if (!test_bit(WMI_READY, &vif->ar->flag) ||
1197             !test_bit(WLAN_ENABLED, &vif->flags))
1198                 return;
1199
1200         /* Enable multicast-all filter. */
1201         mc_all_on = !!(ndev->flags & IFF_PROMISC) ||
1202                     !!(ndev->flags & IFF_ALLMULTI) ||
1203                     !!(mc_count > ATH6K_MAX_MC_FILTERS_PER_LIST);
1204
1205         if (mc_all_on)
1206                 set_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1207         else
1208                 clear_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1209
1210         if (test_bit(ATH6KL_FW_CAPABILITY_WOW_MULTICAST_FILTER,
1211                      vif->ar->fw_capabilities)) {
1212                 mc_all_on = mc_all_on || (vif->ar->state == ATH6KL_STATE_ON);
1213         }
1214
1215         if (!(ndev->flags & IFF_MULTICAST)) {
1216                 mc_all_on = false;
1217                 set_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1218         } else {
1219                 clear_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1220         }
1221
1222         /* Enable/disable "multicast-all" filter*/
1223         ath6kl_dbg(ATH6KL_DBG_TRC, "%s multicast-all filter\n",
1224                    mc_all_on ? "enabling" : "disabling");
1225
1226         ret = ath6kl_wmi_mcast_filter_cmd(vif->ar->wmi, vif->fw_vif_idx,
1227                                                   mc_all_on);
1228         if (ret) {
1229                 ath6kl_warn("Failed to %s multicast-all receive\n",
1230                             mc_all_on ? "enable" : "disable");
1231                 return;
1232         }
1233
1234         if (test_bit(NETDEV_MCAST_ALL_ON, &vif->flags))
1235                 return;
1236
1237         /* Keep the driver and firmware mcast list in sync. */
1238         list_for_each_entry_safe(mc_filter, tmp, &vif->mc_filter, list) {
1239                 found = false;
1240                 netdev_for_each_mc_addr(ha, ndev) {
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                         /*
1250                          * Delete the filter which was previously set
1251                          * but not in the new request.
1252                          */
1253                         ath6kl_dbg(ATH6KL_DBG_TRC,
1254                                    "Removing %pM from multicast filter\n",
1255                                    mc_filter->hw_addr);
1256                         ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1257                                         vif->fw_vif_idx, mc_filter->hw_addr,
1258                                         false);
1259                         if (ret) {
1260                                 ath6kl_warn("Failed to remove multicast filter:%pM\n",
1261                                             mc_filter->hw_addr);
1262                                 return;
1263                         }
1264
1265                         list_del(&mc_filter->list);
1266                         kfree(mc_filter);
1267                 }
1268         }
1269
1270         INIT_LIST_HEAD(&mc_filter_new);
1271
1272         netdev_for_each_mc_addr(ha, ndev) {
1273                 found = false;
1274                 list_for_each_entry(mc_filter, &vif->mc_filter, list) {
1275                         if (memcmp(ha->addr, mc_filter->hw_addr,
1276                                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1277                                 found = true;
1278                                 break;
1279                         }
1280                 }
1281
1282                 if (!found) {
1283                         mc_filter = kzalloc(sizeof(struct ath6kl_mc_filter),
1284                                             GFP_ATOMIC);
1285                         if (!mc_filter) {
1286                                 WARN_ON(1);
1287                                 goto out;
1288                         }
1289
1290                         memcpy(mc_filter->hw_addr, ha->addr,
1291                                ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE);
1292                         /* Set the multicast filter */
1293                         ath6kl_dbg(ATH6KL_DBG_TRC,
1294                                    "Adding %pM to multicast filter list\n",
1295                                    mc_filter->hw_addr);
1296                         ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1297                                         vif->fw_vif_idx, mc_filter->hw_addr,
1298                                         true);
1299                         if (ret) {
1300                                 ath6kl_warn("Failed to add multicast filter :%pM\n",
1301                                             mc_filter->hw_addr);
1302                                 kfree(mc_filter);
1303                                 goto out;
1304                         }
1305
1306                         list_add_tail(&mc_filter->list, &mc_filter_new);
1307                 }
1308         }
1309
1310 out:
1311         list_splice_tail(&mc_filter_new, &vif->mc_filter);
1312 }
1313
1314 static const struct net_device_ops ath6kl_netdev_ops = {
1315         .ndo_open               = ath6kl_open,
1316         .ndo_stop               = ath6kl_close,
1317         .ndo_start_xmit         = ath6kl_data_tx,
1318         .ndo_get_stats          = ath6kl_get_stats,
1319         .ndo_set_features       = ath6kl_set_features,
1320         .ndo_set_rx_mode        = ath6kl_set_multicast_list,
1321 };
1322
1323 void init_netdev(struct net_device *dev)
1324 {
1325         dev->netdev_ops = &ath6kl_netdev_ops;
1326         dev->destructor = free_netdev;
1327         dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1328
1329         dev->needed_headroom = ETH_HLEN;
1330         dev->needed_headroom += sizeof(struct ath6kl_llc_snap_hdr) +
1331                                 sizeof(struct wmi_data_hdr) + HTC_HDR_LENGTH
1332                                 + WMI_MAX_TX_META_SZ + ATH6KL_HTC_ALIGN_BYTES;
1333
1334         dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1335
1336         return;
1337 }